CN115494913A

CN115494913A - Folding rotating shaft structure and folding electronic equipment

Info

Publication number: CN115494913A
Application number: CN202110674456.6A
Authority: CN
Inventors: 谢志; 吴伟峰; 詹强; 刘勇; 石拓
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-12-20
Also published as: WO2022262684A1

Abstract

The application provides a folding rotating shaft structure and folding electronic equipment, which comprise a first cam connecting rod assembly, a second cam connecting rod assembly, an elastic driving assembly and a damping assembly, wherein the first cam connecting rod assembly comprises a first cam, a third cam, a second cam and a fourth cam, the third cam is arranged opposite to the first cam, the second cam and the fourth cam is arranged opposite to the second cam; the elastic driving component is used for providing elastic driving force so that the first cam and the third cam, and the second cam and the fourth cam can approach each other along the length direction of the first cam connecting rod component; and the damping assembly comprises a damping bracket, and the damping bracket is arranged between the first cam connecting rod assembly and the second cam connecting rod assembly and rotates under the action of elastic force to generate friction damping force. The application provides a folding pivot structure and folding electronic equipment passes through damping assembly's setting, can bring the damping effect for the user when opening and closing.

Description

Folding rotating shaft structure and folding electronic equipment

Technical Field

The application relates to the technical field of folding screens, in particular to a folding rotating shaft structure and folding electronic equipment.

Background

As the flexible folding screen technology becomes mature, flexible folding electronic products have become a trend, and folding electronic products (such as folding mobile phones, folding flat panels, folding computers and other electronic devices) need to meet higher reliability and better operation experience.

In order to ensure good bending experience, the folding electronic equipment needs to have a certain damping or hovering function in the bending process, the folding rotating shaft structure is a core mechanism for realizing folding, but the current folding rotating shaft structure design has the problems that the hand feeling is not good when the folding rotating shaft structure is opened, and better experience cannot be brought to consumers. How to design a damping mechanism to achieve better user experience is a problem to be solved urgently at present.

Disclosure of Invention

In view of this, the application provides a folding pivot structure and folding electronic equipment with damping effect, adopts the embodiment of this application, bends or opens and to have the damping in-process, can guarantee the stability of flexible screen, simple structure.

In a first aspect, an embodiment of the present application provides a folding spindle structure, including: the coaxial rotating first cam connecting rod component comprises a first connecting rod and a second connecting rod which are symmetrically arranged, and the first connecting rod and the second connecting rod can rotate relative to each other; the first cam set is also included; the first cam group comprises a first cam, a third cam arranged opposite to the first cam, a second cam and a fourth cam arranged opposite to the second cam; the second end of the first connecting rod is fixed with the third cam which coaxially rotates with the first connecting rod, the second end of the second connecting rod is fixed with the fourth cam which coaxially rotates with the second connecting rod, and the third cam and the fourth cam are positioned on the same side of the first cam connecting rod component; the first cam and the second cam do not rotate with the first connecting rod and the second connecting rod; the second cam connecting rod assembly comprises a third connecting rod and a fourth connecting rod which are symmetrically arranged, the third connecting rod and the fourth connecting rod can rotate relative to each other, the third connecting rod and the first connecting rod rotate coaxially, and the fourth connecting rod and the second connecting rod rotate coaxially; the first end of the third connecting rod is fixedly connected with the first end of the first connecting rod through a first connecting rod pin shaft, and the first end of the fourth connecting rod is fixedly connected with the first end of the second connecting rod through a second connecting rod pin shaft; the first synchronous component comprises a first driving gear and a second driving gear, the first driving gear is fixed at the second end of the first connecting rod, and the first driving gear is arranged on one surface of the third cam, which deviates from the first cam; the second driving gear is fixed at the second end of the second connecting rod, the second driving gear is arranged on one surface of the fourth cam, which is deviated from the second cam, and the first driving gear and the second driving gear are meshed with each other; the second synchronous component comprises a third driving gear and a fourth driving gear, the third driving gear is fixed at the second end of the third connecting rod, the fourth driving gear is fixed at the second end of the fourth connecting rod, and the third driving gear and the fourth driving gear are meshed with each other; the elastic driving component is used for providing elastic driving force so that the first cam and the third cam, and the second cam and the fourth cam can approach each other along the direction of a rotating axis of the rotating connection of the first connecting rod and the second connecting rod; and the damping assembly comprises a damping bracket, and the damping bracket is arranged between the first cam connecting rod assembly and the second cam connecting rod assembly and rotates under the action of elastic force to generate friction damping force.

Adopt the embodiment of this application, through set up damping subassembly in folding pivot structure, this damping subassembly produces the friction pair with first cam link assembly and second cam link assembly under elastic drive assembly's drive effect, and then produces pivoted damping force, can bring the damping effect for the user when opening or closing.

In one possible design, the elastic driving assembly includes a first abutting plate, a first cam shaft, a first elastic member, a second cam shaft, and a second elastic member; the first camshaft penetrates through the first connecting rod and the third connecting rod, the second camshaft penetrates through the second connecting rod and the fourth connecting rod, so that the first connecting rod and the second connecting rod rotate relative to each other, and the third connecting rod and the fourth connecting rod rotate relative to each other; the first cam shaft is further arranged through the first cam and the damping support, and the second cam shaft is further arranged through the second cam and the damping support; the first abutting plate is positioned at one end, far away from the first cam and the second cam, of the first cam shaft and the second cam shaft; the first elastic piece is sleeved on the first cam shaft, and two ends of the first elastic piece respectively elastically abut against one surface of the first cam, which is far away from the third cam, and the first abutting plate; the second elastic piece is sleeved on the second cam shaft, and two ends of the second elastic piece are respectively elastically abutted against one surface of the second cam, which is far away from the fourth cam, and the first abutting plate.

With this configuration, the elastic drive assembly can drive the first cam and the third cam, and the second cam and the fourth cam to approach each other in the direction of the rotation axis between the first link and the second link.

In a possible design, the second cam link assembly further includes a second cam set, the folding rotating shaft structure further includes a limiting piece, and the second cam set includes a fifth cam, a seventh cam disposed opposite to the fifth cam, a sixth cam, and an eighth cam disposed opposite to the sixth cam; the second end of the third connecting rod is fixed with the seventh cam which coaxially rotates with the third connecting rod, the second end of the fourth connecting rod is fixed with the eighth cam which coaxially rotates with the fourth connecting rod, the seventh cam and the eighth cam are positioned at the same side of the second cam connecting rod assembly, the fifth cam and the sixth cam do not rotate along with the third connecting rod and the fourth connecting rod, the limiting piece is positioned at one end of the first cam shaft and the second cam shaft, which is far away from the fifth cam and the sixth cam, and one surface of the fifth cam and one surface of the sixth cam, which is back to the seventh cam and the eighth cam, are both abutted against the limiting piece. Based on the design, the embodiment of the application can bring a damping effect to a user when the door is opened or closed.

In one possible design, the first synchronizing assembly further comprises two first synchronizing gears, the two first synchronizing gears are arranged between the first driving gear and the second driving gear, and the adjacent first driving gear, the two first synchronizing gears and the second driving gear are meshed with each other; the second synchronizing assembly further comprises two second synchronizing gears, the third driving gear and the fourth driving gear are arranged between the two second synchronizing gears and are adjacent to each other, and the third driving gear, the two second synchronizing gears and the fourth driving gear are meshed with each other. Based on the design, the second synchronous gear can enable the third link and the fourth link in the second cam link assembly to move synchronously, and the synchronism of the folding rotating shaft structure and the folding electronic equipment is maintained.

In one possible design, the first cam and the second cam are fixedly connected or integrally formed by a first connecting plate, and the fifth cam and the sixth cam are fixedly connected or integrally formed by a second connecting plate; the elastic driving assembly further comprises a third cam shaft, a third elastic piece, a fourth cam shaft and a fourth elastic piece; the third camshaft penetrates through the first connecting plate, the first synchronous gear, the damping support, the second synchronous gear and the second connecting plate; the fourth camshaft penetrates through the first connecting plate, the other first synchronous gear, the damping bracket, the other second synchronous gear and the second connecting plate; the third elastic piece is sleeved on the third cam shaft, and two ends of the third elastic piece respectively elastically abut against one surface of the first connecting plate, which is far away from the third cam, and the abutting plate; the fourth elastic piece is sleeved on the fourth cam shaft, and two ends of the fourth elastic piece are respectively elastically abutted against one surface of the first connecting plate, which is far away from the fourth cam, and the abutting plate.

In one possible design, the damping assembly further includes a third cam set, the damping bracket includes a ninth cam and a tenth cam, the third cam set includes an eleventh cam disposed opposite the ninth cam, a twelfth cam disposed opposite the tenth cam; the ninth cam and the eleventh cam are both sleeved on the first cam shaft, the tenth cam and the twelfth cam are both sleeved on the second cam shaft, the ninth cam is meshed with the eleventh cam, and the tenth cam is meshed with the twelfth cam; the ninth cam and the tenth cam are fixed at two ends of the damping support, the first cam shaft penetrates through the ninth cam, and the second cam shaft penetrates through the tenth cam; the eleventh cam which rotates coaxially with the third connecting rod is fixed at the second end of the third connecting rod, and the twelfth cam which rotates coaxially with the fourth connecting rod is fixed at the second end of the fourth connecting rod; or, the eleventh cam which rotates coaxially with the first link is fixed to the second end of the first link, and the twelfth cam which rotates coaxially with the second link is fixed to the second end of the second link.

In one possible design, the damping assembly further includes a third cam set including a ninth cam, a tenth cam, a fifteenth cam, and a sixteenth cam, the damping mount includes a first double-faced cam and a second double-faced cam, the first double-faced cam is located between the ninth cam and the fifteenth cam, the second double-faced cam is located between the tenth cam and the sixteenth cam, the first double-faced cam includes an eleventh cam disposed opposite to the ninth cam and a thirteenth cam disposed opposite to the fifteenth cam, the second double-faced cam includes a twelfth cam disposed opposite to the tenth cam and a fourteenth cam disposed opposite to the sixteenth cam; the ninth cam, the eleventh cam, the thirteenth cam and the fifteenth cam are all sleeved on the first cam shaft, and the tenth cam, the twelfth cam, the fourteenth cam and the sixteenth cam are all sleeved on the second cam shaft; the first double-faced cam and the second double-faced cam are fixed at two ends of the damping support, the first cam shaft penetrates through the first double-faced cam, and the second cam shaft penetrates through the second double-faced cam; the ninth cam is engaged with the eleventh cam, the tenth cam is engaged with the twelfth cam, the thirteenth cam is engaged with the fifteenth cam, and the fourteenth cam is engaged with the sixteenth cam; the second end of the first connecting rod is fixed with the ninth cam which coaxially rotates with the first connecting rod, the second end of the second connecting rod is fixed with the tenth cam which coaxially rotates with the second connecting rod, the second end of the third connecting rod is fixed with the fifteenth cam which coaxially rotates with the third connecting rod, and the second end of the fourth connecting rod is fixed with the sixteenth cam which coaxially rotates with the fourth connecting rod. Based on the design, the embodiment of the application can bring a damping effect to a user when the door is opened or closed.

In one possible design, the coaxial rotation damping assembly further includes a first friction plate, a second friction plate, and a third friction plate; the first friction plate is sleeved on the first cam shaft, the second cam shaft, the third cam shaft and the fourth cam shaft, and the first friction plate is close to the first driving gear and the second driving gear; a first end of the second friction plate is sleeved on the first connecting rod pin shaft, a second end of the second friction plate is sleeved on the first camshaft, and a second end of the second friction plate is positioned between the first friction plate and the damping bracket; the first end of the third friction plate is sleeved on the second connecting rod pin shaft, the second end of the third friction plate is sleeved on the second cam shaft, and the second end of the third friction plate is located between the first friction plate and the damping support. Based on such design, can promote folding electronic equipment damping force when rotating, can bring the damping effect for the user when opening or closing.

In one possible design, the damping assembly further includes a fourth friction plate, a fifth friction plate, and a sixth friction plate; the fourth friction plate is sleeved on the first cam shaft, the second cam shaft, the third cam shaft and the fourth cam shaft; the fourth friction plate is arranged close to the third driving gear and the fourth driving gear; a first end of the fifth friction plate is sleeved on the first connecting rod pin shaft, a second end of the fifth friction plate is sleeved on the first camshaft, and a second end of the fifth friction plate is positioned between the fourth friction plate and the damping support; the first end of the sixth friction plate is sleeved on the second connecting rod pin shaft, the second end of the sixth friction plate is sleeved on the second cam shaft, and the second end of the sixth friction plate is positioned between the fourth friction plate and the damping support and coaxially rotates. Based on such design, can promote folding electronic equipment damping force when rotating, can bring the damping effect for the user when opening or closing.

In one possible design, the elastic driving assembly further includes a fifth elastic member, a sixth elastic member, and a second abutting plate; the fifth elastic piece is sleeved on the first cam shaft, and two ends of the fifth elastic piece respectively and elastically abut against one surface of the fifth cam, which is opposite to the seventh cam, and the second abutting plate so as to abut against the limiting sheet; the sixth elastic piece is sleeved on the second cam shaft, and two ends of the sixth elastic piece respectively elastically abut against one surface of the sixth cam, which is opposite to the eighth cam, and the second abutting plate so as to abut against the limiting piece.

In one possible design, the elastic driving assembly further includes a fifth elastic member, a sixth elastic member, a seventh elastic member, an eighth elastic member, and a second abutting plate; the fifth elastic piece is sleeved on the first cam shaft, and two ends of the fifth elastic piece are respectively elastically abutted against one surface of the fifth cam, which is opposite to the seventh cam, and the second abutting plate so as to abut against the limiting piece; the sixth elastic piece is sleeved on the second cam shaft, and two ends of the sixth elastic piece respectively and the sixth cam are opposite to one surface of the eighth cam and elastically abut against the second abutting plate so as to abut against the limiting sheet; the seventh elastic piece is sleeved on the third cam shaft, and two ends of the seventh elastic piece respectively elastically abut against one surface of the second connecting plate, which is far away from the seventh cam, and the second abutting plate so as to abut against the limiting sheet; the eighth elastic piece is sleeved on the fourth cam shaft, and two ends of the eighth elastic piece respectively elastically abut against one surface of the second connecting plate, which is far away from the eighth cam, and the second abutting plate so as to abut against the limiting piece.

In one possible design, the damping assembly further includes a first friction plate, a second friction plate, a third friction plate, a fourth friction plate, a fifth friction plate, and a sixth friction plate; the second friction plate and the second friction plate are sleeved at one ends, far away from the first cam and the second cam, of the first cam shaft, the second cam, the third cam shaft and the fourth cam shaft; the fifth friction plate and the sixth friction plate are sleeved at one ends, far away from the fifth cam and the sixth cam, of the first cam shaft, the second cam shaft, the third cam shaft and the fourth cam shaft; one end of each of the first camshaft, the second camshaft, the third camshaft and the fourth camshaft is sleeved with a first friction plate, and the first friction plate is positioned between the second friction plate and the third friction plate; a fourth friction plate is sleeved at the other end of each of the first camshaft, the second camshaft, the third camshaft and the fourth camshaft, and the fourth friction plate is positioned between the fifth friction plate and the sixth friction plate; two ends of the first elastic piece respectively elastically abut against the third friction plate and one surface of the first cam, which is far away from the third cam; two ends of the second elastic piece respectively elastically abut against the third friction plate and one surface of the second cam, which is far away from the fourth cam; two ends of the fifth elastic piece respectively elastically abut against the sixth friction plate and one surface of the fifth cam, which is far away from the seventh cam; two ends of the sixth elastic piece respectively elastically abut against the sixth friction plate and one surface of the sixth cam, which is far away from the eighth cam.

In a possible design, two ends of the third elastic member respectively elastically abut against the third friction plate and one surface of the first connecting plate departing from the third cam; two ends of the fourth elastic piece respectively elastically abut against the third friction plate and one surface of the first connecting plate, which is far away from the fourth cam; two ends of the seventh elastic piece respectively elastically abut against the sixth friction plate and one surface of the second connecting plate, which is far away from the seventh cam; two ends of the eighth elastic piece respectively elastically abut against the sixth friction plate and one surface of the second connecting plate, which is far away from the eighth cam.

In one possible design, the first connecting rod rotates to drive the first cam shaft and the second cam shaft to rotate together.

In one possible design, the first link rotates to rotate the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft together.

In a second aspect, an embodiment of the present application further provides a folding spindle structure, including: a first limiting sheet; the coaxial rotating first cam connecting rod assembly comprises a first connecting rod and a second connecting rod which are symmetrically arranged, and the first connecting rod and the second connecting rod can rotate relative to each other; the cam group comprises a first cam group and a second cam group; the first cam group comprises a first cam, a third cam arranged opposite to the first cam, a second cam and a fourth cam arranged opposite to the second cam; the second end of the first connecting rod is fixedly provided with the first cam which coaxially rotates with the first connecting rod, the second end of the second connecting rod is fixedly provided with the second cam which coaxially rotates with the second connecting rod, and the first cam and the second cam are positioned on the same side of the first cam connecting rod assembly; the second cam connecting rod assembly comprises a third connecting rod and a fourth connecting rod which are symmetrically arranged, the third connecting rod and the fourth connecting rod can rotate relative to each other, the third connecting rod and the first connecting rod rotate coaxially, and the fourth connecting rod and the second connecting rod rotate coaxially; further comprising: the first end of the third connecting rod is fixedly connected with the first end of the first connecting rod through a first connecting rod pin shaft, and the first end of the fourth connecting rod is fixedly connected with the first end of the second connecting rod through a second connecting rod pin shaft; the second cam group comprises a fifth cam, a seventh cam arranged opposite to the fifth cam, a sixth cam and an eighth cam arranged opposite to the sixth cam; the second end of the third connecting rod is fixed with the seventh cam which coaxially rotates with the third connecting rod, the second end of the fourth connecting rod is fixed with the eighth cam which coaxially rotates with the fourth connecting rod, and the seventh cam and the eighth cam are positioned on the same side of the second cam connecting rod assembly; the first synchronous component comprises a first driving gear and a second driving gear, the first driving gear is fixed at the second end of the first connecting rod, and the first driving gear is arranged on one surface of the third cam, which deviates from the first cam; the second driving gear is fixed at the second end of the second connecting rod, the second driving gear is arranged on one surface of the fourth cam, which is far away from the second cam, and the first driving gear and the second driving gear are meshed with each other; the second synchronous component comprises a third driving gear and a fourth driving gear, the third driving gear is fixed at the second end of the third connecting rod, the fourth driving gear is fixed at the second end of the fourth connecting rod, and the third driving gear and the fourth driving gear are meshed with each other; the elastic driving assembly comprises a first elastic piece, a first cam shaft, a second cam shaft and a second elastic piece; two ends of the first elastic piece respectively elastically abut against one surface of the third cam departing from the first cam and one surface of the fifth cam departing from the seventh cam; two ends of the second elastic piece respectively elastically abut against one surface of the fourth cam departing from the second cam and one surface of the sixth cam departing from the eighth cam; the first cam shaft penetrates through the first limiting piece, the first connecting rod and the third connecting rod, and the first cam shaft further penetrates through the first cam and the third cam; the second cam shaft penetrates through a first limiting piece, the second connecting rod and the fourth connecting rod, the second cam shaft further penetrates through the second cam and the fourth cam, and the first limiting piece does not rotate along with the first connecting rod and the second connecting rod.

By adopting the embodiment of the application, the elastic driving assembly is arranged at the middle position of the folding rotating shaft structure, the first connecting plate and the second connecting plate can move towards the middle position, and based on the design, the damping effect can be brought to a user when the folding rotating shaft structure is opened and closed.

In a possible design, the folding rotating shaft structure further comprises a second limiting piece; the second limiting piece is sleeved at the second ends of the first cam shaft and the second cam shaft, and the second limiting piece does not rotate along with the third connecting rod and the fourth connecting rod. Based on such design, can increase damping force, promote the damping effect.

In a third aspect, an embodiment of the present application further provides a foldable electronic device, including a flexible screen, a first housing, and a second housing, where the foldable electronic device further includes the folding spindle structure as described above; the first shell and the second shell rotate relatively or rotate back to back through the folding rotating shaft structure; the first shell comprises a first surface, the second shell comprises a second surface, the flexible screen continuously covers the first surface of the first shell, the folding rotating shaft structure and the second surface of the second shell, and the flexible screen is fixedly connected with the first surface of the first shell and the second surface of the second shell respectively.

The application provides a folding pivot structure and folding electronic equipment is through setting up damping subassembly in folding pivot structure, and this damping subassembly produces the friction pair with first cam link assembly and second cam link assembly under elastic drive assembly's drive effect, and then produces pivoted damping force, can bring the damping effect for the user when opening or closing.

Drawings

Fig. 1 is a schematic view of a foldable electronic device according to an embodiment of the present application.

Fig. 2 is a schematic view of a folding spindle structure in an embodiment of the present application.

Fig. 3 is a disassembled schematic view of the folding spindle structure according to the embodiment of the present application.

Fig. 4 is another exploded view of the folding spindle structure according to the embodiment of the present disclosure.

Fig. 5 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 6 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 7 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 8 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 9 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 10 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 11 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 12 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 13 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 14 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 15 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 16 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 17 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 18 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 19 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 20 is a schematic view of another embodiment of the folding spindle structure of the present application.

Fig. 21 is a schematic view of another embodiment of the folding spindle structure of the present application.

Description of the main elements

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1, which is a schematic structural diagram of a foldable electronic device 100 according to an embodiment of the present disclosure. In some possible implementations, the foldable electronic device 100 may be at least one of a foldable mobile phone, a foldable tablet, a foldable computer, a foldable notebook, an in-vehicle mobile device, an electronic device with a flexible foldable display screen, and the like. In the embodiment of the present application, the foldable electronic device 100 may be a foldable mobile phone, and the foldable mode thereof is an inner folding mode or an outer folding mode.

The folding electronic device 100 may include a folding hinge structure 10, a first housing 20, a second housing 30, and a flexible screen 40. The two opposite sides of the foldable electronic device 100 are respectively connected to the first housing 20 and the second housing 30, so that the first housing 20 and the second housing 30 can be relatively rotated or rotated back to back through the foldable rotating shaft structure 10, and the switch between the flat state and the folded state is realized. The flexible screen 40 is disposed on the first housing 20, the folding spindle structure 10 and the second housing 30. Specifically, the first casing 20 includes a first surface, the second casing 30 includes a second surface, the flexible screen 40 continuously covers the first surface of the first casing 20, the folding spindle structure 10 and the second surface of the second casing 30, and the flexible screen 40 is respectively and fixedly connected to the first surface of the first casing 20 and the second surface of the second casing 30.

It is understood that in some implementations, the flexible screen 40 may be used to display information and provide an interactive interface for a user, and the flexible screen 40 may be fixedly connected to the first housing 20 and the second housing 30 by using glue, etc. The first casing 20 and the second casing 30 may respectively form an installation space for installing electronic components such as a circuit board, a battery, a receiver, a speaker, a camera, etc. of the foldable electronic device 100. The circuit board may integrate electronic components such as a main controller, a storage unit, an antenna module, and a power management module of the foldable electronic device 100, and the battery may supply power to the electronic components such as the flexible screen, the circuit board, the receiver, the speaker, and the camera.

When the first housing 20 and the second housing 30 are rotated to be stacked on each other (the stacking finger sides may be attached without a gap, or may be opposite to each other), the foldable electronic device 100 may be in a folded state. Conversely, when the first casing 20 and the second casing 30 are rotated back to the limit position from the stacked state, that is, when the rotation back cannot be continued, the first casing 20 and the second casing 30 are flattened, and the folded electronic device 100 is in the flattened state. When the foldable electronic device 100 is completely unfolded, the flexible screen 40 can be unfolded, and the foldable electronic device 100 has a large screen display effect. In a folded state, the first housing 20 is stacked on the second housing 30, and the flexible screen 40 may be interposed between the first housing 20 and the second housing 30.

It is understood that the folded electronic device 100 may be unfolded from 0 to 180. That is, the folded electronic device 100 may be unfolded or fully closed. Alternatively, the foldable electronic device 100 may be unfolded by 30 °,70 °,150 °, and 180 °. When the folded electronic device 100 is unfolded 70-150, the folded electronic device 100 can be freely stopped at a desired angle. It is understood that the folded electronic device 100 can be freely stopped at any one of the angles of 0-180.

The present application provides a foldable electronic device 100 with a damping feel during opening and folding, which is mainly achieved by the folding hinge structure 10 of the foldable electronic device 100. For the purposes of understanding, the following detailed description is to be read in connection with the drawings and the detailed description.

Fig. 2 to fig. 4 are schematic structural views of an embodiment of a folding spindle structure 10 according to the present application.

It is understood that, in the present embodiment, the folding spindle structure 10 may include a first cam link assembly 11, a second cam link assembly 12, a damping assembly 13, an elastic driving assembly 14, a limiting plate 15, a first link pin 16, and a second link pin 17.

Specifically, the first cam link assembly 11 may include a first link 111, a second link 112, a first cam set 113, and a first link plate 114. The first link 111 and the second link 112 are symmetrically disposed, and the first link 111 and the second link 112 may rotate relative to each other. The first cam set 113 can include a first cam 1132 engaged with a third cam 1133 disposed opposite the first cam 1132. The first cam set 113 may further include a second cam 1134 engaged with a fourth cam 1135 disposed opposite the second cam 1134. The first cam 1132 may be disposed at a first end of the first connection plate 114, and the third cam 1133 may be disposed at a second end of the first connection plate 114. It should be noted that, in the embodiment of the present application, the first cam 1132 and the second cam 1134 only need to rotate with the first link 111 and the second link 112, and therefore, the first cam 1132 and the second cam 1134 may be fixed in other ways besides being fixedly connected by the first connection plate 114 or being made into a structure of a conjoined cam, and the present application is not limited in particular.

In one embodiment of the present application, the first cam 1132 and the second cam 1134 are fixedly connected or integrally formed.

A first end of the first link 111 may be fixedly connected to a first end of the first link pin 16. Specifically, a first end of the first link 111 may be provided with a first fixing hole 1111, the first fixing hole 1111 may be engaged with a first end of the first link pin 16, and the first end of the first link pin 16 may be inserted into the first fixing hole 1111 and fixed in the first fixing hole 1111. A first end of the second link 112 may be fixedly connected to a first end of the second link pin 17. Specifically, a first end of the second link 112 may be provided with a second fixing hole 1121, the second fixing hole 1121 may be matched with a first end of the second link pin 17, and the first end of the second link pin 17 may be inserted into the second fixing hole 1121 and fixed in the second fixing hole 1121.

It is understood that the third cam 1133 rotating coaxially with the first link 111 is fixed to the second end of the first link 111, the fourth cam 1135 rotating coaxially with the second link 112 is fixed to the second end of the second link 112, and the third cam 1133 and the fourth cam 1135 are located on the same side of the first cam link assembly 11.

In this embodiment, the second cam link assembly 12 may include a third link 121, a fourth link 122, a second cam set 123, and a second connecting plate 124. The third link 121 and the fourth link 122 are symmetrically disposed, and the third link 121 and the fourth link 122 may rotate relative to each other. The third link 121 rotates coaxially with the first link 111, and the fourth link 122 rotates coaxially with the second link 112. The second cam set 123 may include a fifth cam 1232 engaged with a seventh cam 1233 disposed opposite the fifth cam 1232. The second cam set 123 can further include a sixth cam 1234 engaged with an eighth cam 1235 disposed opposite the sixth cam 1234. The fifth cam 1232 may be fixed to the second end of the third link 121, the seventh cam 1233 may be disposed at the first end of the second link plate 124, the sixth cam 1234 may be fixed to the second end of the fourth link 122, and the eighth cam 1235 may be disposed at the second end of the second link plate 124. Similarly, in the embodiment of the present application, the seventh cam 1233 and the eighth cam 1235 only need to rotate with the third link 121 and the fourth link 122, and therefore, the seventh cam 1233 and the eighth cam 1235 may be fixed by other methods besides being fixedly connected by the second connecting plate 124 or being in a structure of a conjoined cam, and the present application is not limited in particular.

The first end of the third link 121 may be fixedly connected to the second end of the first link pin 16. Specifically, the first end of the third link 121 may be provided with a third fixing hole 1211, the third fixing hole 1211 may be matched with the second end of the first link pin 16, and the second end of the first link pin 16 may be inserted into the third fixing hole 1211 and fixed in the third fixing hole 1211. A first end of the fourth link 122 may be fixedly connected to a second end of the second link pin 17. Specifically, a first end of the fourth link 122 may be provided with a fourth fixing hole 1221, the fourth fixing hole 1221 may be matched with a second end of the second link pin 17, and the second end of the second link pin 17 may be inserted into the fourth fixing hole 1221 and fixed in the fourth fixing hole 1221. It is understood that the fifth cam 1232, which rotates coaxially with the third link 121, is fixed to the second end of the third link 121, the sixth cam 1234, which rotates coaxially with the fourth link 122, is fixed to the second end of the fourth link 122, and the fifth cam 1232 and the sixth cam 1234 are located on the same side of the second cam link assembly 12.

The elastic driving assembly 14 includes a first abutting plate 141, a first cam shaft 142, a first elastic member 143, a second cam shaft 144 and a second elastic member 145. One end of the first cam shaft 142 may be connected to the first abutting plate 141, and the other end of the first cam shaft 142 may penetrate through the first elastic member 143 and penetrate through the rotation axes of the first connecting rod 111 and the third connecting rod 121, so as to realize the relative rotation of the first connecting rod 111 and the third connecting rod 121, and further penetrate through the axes of the first cam 1132 and the seventh cam 1233. One end of the second cam shaft 144 is connected to the first abutting plate 141, and the other end of the second cam shaft 144 can penetrate through the second elastic member 145 and penetrate through the rotation axes of the second connecting rod 112 and the fourth connecting rod 122, so as to realize the relative rotation between the second connecting rod 112 and the fourth connecting rod 122, and further penetrate through the axes of the second cam 1134 and the eighth cam 1235. The first elastic member 143 and the second elastic member 145 are respectively sleeved on the first cam shaft 142 and the second cam shaft 144. Two ends of the first elastic element 143 elastically abut against a surface of the first cam 1132 departing from the third cam 1133 and the first abutting plate 141, respectively. Two ends of the second elastic member 145 elastically abut against a surface of the second cam 1134 departing from the fourth cam 1135 and the first abutting plate 141, respectively. Based on such design, the first cam shaft 142 can sequentially pass through the first abutting plate 141, the first elastic member 143, the first cam 1132 and the third cam 1133. The second cam shaft 144 may sequentially pass through the first holding plate 141, the second elastic member 145, the second cam 1134, and the fourth cam 1135.

It is understood that the first cam shaft 142 may be inserted through the first link 111 and the third link 121, and the second cam shaft 144 may be inserted through the second link 112 and the fourth link 122, so that the first link 111 and the second link 112 rotate relative to each other, and the third link 121 and the fourth link 122 rotate relative to each other.

In this embodiment, the first cam 1132 and the third cam 1133 have a protrusion and a notch respectively disposed on opposite surfaces thereof for engagement. The second cam 1134 and the fourth cam 1135 have a protrusion and a notch on their opposite surfaces, respectively. Based on such design, the elastic driving component 14 can drive the first cam 1132 and the third cam 1133 and the second cam 1134 and the fourth cam 1135 in the first cam set 113 to cooperate to unfold or fold the foldable electronic device 100. Specifically, the elastic driving assembly 14 is configured to provide an elastic driving force to enable the first cam 1132 and the third cam 1133 and the second cam 1134 and the fourth cam 1135 to approach each other along a rotation axis direction of the first link 111 and the second link 112. The opposite surfaces of the fifth cam 1232 and the seventh cam 1233 are respectively provided with a projection and a notch for engagement. The opposite surfaces of the sixth cam 1234 and the eighth cam 1235 are provided with a protrusion and a notch, respectively, which are engaged with each other. Based on such design, the elastic driving component 14 can drive the fifth cam 1232 and the seventh cam 1233 and the sixth cam 1234 and the eighth cam 1235 of the second cam set 123 to cooperate to unfold or fold the foldable electronic device 100. Specifically, the elastic driving assembly 14 is used for providing an elastic driving force to enable the fifth cam 1232 and the seventh cam 1233 and the sixth cam 1234 and the eighth cam 1235 to approach each other along the length direction of the second cam link assembly 12.

In this embodiment, the first elastic element 143 and the second elastic element 145 may be energy storage springs.

In this embodiment, the folding spindle structure 10 further includes a first synchronizing assembly 18.

The first synchronizing assembly 18 may include a first drive gear 181 and a second drive gear 182. The first driving gear 181 is fixed at the second end of the first connecting rod 111, and the first driving gear 181 is disposed on a surface of the third cam 1133 departing from the first cam 1132 and sleeved on the first cam shaft 142. The second driving gear 182 is fixed at the second end of the second link 112, and the second driving gear 182 may be disposed on a surface of the fourth cam 1135 facing away from the second cam 1134 and sleeved on the second cam shaft 144. In this application scenario, the first driving gear 181 and the second driving gear 182 may be engaged with each other.

In this embodiment, the folding spindle structure 10 may further include a second synchronizing assembly 19.

The second synchronizing assembly 19 may include a third driving gear 191 and a fourth driving gear 192. The third driving gear 191 is fixed to a second end of the third link 121, and the third driving gear 191 may be sleeved on the first cam shaft 142. The fourth driving gear 192 is fixed to the second end of the fourth link 122, and the fourth driving gear 192 may be sleeved on the second cam shaft 144. In this application scenario, the third driving gear 191 and the fourth driving gear 192 may mesh with each other.

Based on the design, the first link 111, the second link 112, the third link 121 and the fourth link 122 are all links with driving gear structures, and can be used for driving other components to move. For example, the mutual engagement between the first link 111 and the second link 112, and the mutual engagement between the third link 121 and the fourth link 122 ensure the synchronism of the movement of the folding electronic device 100. The first link 111 and the third link 121 are connected by a first link pin 16, and the second link 112 and the fourth link 122 are connected by a second link pin 17, so that the motion of the foldable electronic device 100 can be kept synchronous.

In this embodiment, the damping assembly 13 includes a damping bracket 131.

The damping bracket 131 is disposed between the first cam link assembly 11 and the second cam link assembly 12, and rotates under the action of an elastic force to generate a certain frictional damping force, thereby ensuring that the damping force is generated at a set angle. Specifically, the damping bracket 131 is disposed between the first link 111 and the second link 112 and between the third link 121 and the fourth link 122.

Specifically, the damping bracket 131 is provided with a through hole 1311 and a through hole 1312, the second connecting plate 124 is provided with a through hole 1241 and a through hole 1242, and the limiting piece 15 may be provided with a first slot 151 and a second slot 152. Based on such design, the second end of the first cam shaft 142 may sequentially pass through the first abutting plate 141, the first elastic member 143, the first cam 1132, the third cam 1133, the first driving gear 181, the through hole 1311 of the damping bracket 131, the third driving gear 191, the through hole 1241 of the second connecting plate 124, and the first slot 151, so as to be snapped in the first slot 151. The second cam shaft 144 may sequentially pass through the first abutting plate 141, the second elastic member 145, the second cam 1134, the fourth cam 1135, the second driving gear 182, the through hole 1312 of the damping bracket 131, the fourth driving gear 192, the through hole 1242 of the second connecting plate 124, and the second slot 152, so as to be fastened in the second slot 152. Based on such a design, the limiting piece 15 can ensure that the first cam shaft 142 and the second cam shaft 144 cannot be disengaged from the folding spindle structure 10 under the action of the spring force. It can be understood that the limiting plate 15 is located at one end of the first cam shaft 142 and the second cam shaft 144 away from the fifth cam and the sixth cam, and one surfaces of the fifth cam 1232 and the sixth cam 1234 opposite to the seventh cam 1233 and the eighth cam 1235 are both abutted against the limiting plate 15.

It is understood that the elastic driving assembly 14 can provide an elastic driving force to make the first cam 1132 and the third cam 1133, and the second cam 1134 and the fourth cam 1135 approach each other along the direction of the rotation axis of the first link 111 and the second link 112.

Based on such a design, the damping bracket 131, under the driving force provided by the elastic driving component 14, can generate friction pairs with the first link 111, the second link 112, the third link 121, and the fourth link 122, thereby increasing the rotational damping force, achieving the intermediate hovering requirement of the folding electronic device 100, and providing a damping feeling for the user.

It is understood that in another possible embodiment, the first synchronizing assembly 18 may further include a double number of first synchronizing gears 183, the second synchronizing assembly 19 may further include a double number of second synchronizing gears 193, and the first synchronizing gears 183 may be disposed between the first driving gear 181 and the second driving gear 182. In this application scenario, the adjacent first driving gear 181, the first synchronizing gear 183, and the second driving gear 182 may be engaged with each other. The second synchronizing gear 193 may be disposed between the third driving gear 191 and the fourth driving gear 192. In this application scenario, the adjacent third driving gear 191, the second synchronizing gear 193, and the fourth driving gear 192 may mesh with each other.

In some possible implementations, the elastic driving assembly 14 may further include a third cam shaft 146, a third elastic member 147, a fourth cam shaft 148 and a fourth elastic member 149. One end of the third cam shaft 146 may be connected to the first abutting plate 141, and the other end of the third cam shaft 146 may penetrate through the third elastic member 147 and the first connecting plate 114, sequentially penetrate through the first synchronizing gear 183, the damping bracket 131, the second synchronizing gear 193, the second connecting plate 124, and the limiting piece 15, and be fixed to the limiting piece 15. One end of the fourth cam shaft 148 is connected to the first abutting plate 141, and the other end of the fourth cam shaft 148 can penetrate through the fourth elastic member 149 and the first connecting plate 114, sequentially penetrate through the first synchronizing gear 183, the damping bracket 131, the second synchronizing gear 193, the second connecting plate 124, and the limiting piece 15, and is fixed to the limiting piece 15. The third elastic member 147 and the fourth elastic member 149 are respectively sleeved on the third cam shaft 146 and the fourth cam shaft 148. Two ends of the third elastic element 147 elastically abut against a surface of the first connecting plate 114 departing from the third cam 1133 and the first abutting plate 141 respectively. Two ends of the fourth elastic element 149 elastically abut against a surface of the first connecting plate 114 departing from the fourth cam 1135 and the first abutting plate 141 respectively.

Specifically, the limiting plate 15 is further provided with a third opening 153 and a fourth opening 154, and the second end of the third cam shaft 146 may sequentially pass through the first abutting plate 141, the third elastic member 147, the first connecting plate 114, the first synchronizing gear 183, the damping bracket 131, the second synchronizing gear 193, the second connecting plate 124 and the third opening 153, and be fixed in the third opening 153. The fourth cam shaft 148 may sequentially pass through the first holding plate 141, the fourth elastic member 149, the first connection plate 114, the first synchronizing gear 183, the damping bracket 131, the second synchronizing gear 193, the second connection plate 124, and the fourth slot 154, and be fixed in the fourth slot 154.

In this embodiment, the third elastic member 147 and the fourth elastic member 149 may be energy storage springs.

It is understood that, in some embodiments, the first cam shaft 142 may be disposed through the first link 111 and the third link 121, and the first cam shaft 142 is further disposed through the first cam 1132 and the damping bracket 131. The second cam shaft 144 may be inserted through the second link 112 and the fourth link 122, and the second cam shaft 144 is further inserted through the second cam 1134 and the damping bracket 131.

Please refer to fig. 5, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding hinge structure 10 shown in fig. 2 is that, as shown in fig. 5, the second connecting plate 124, the third link 121 and the fourth link 122 in the present embodiment are not provided with the cam structures engaged with each other. The damping bracket 131 may rotate under the elastic force to generate a certain frictional damping force, thereby ensuring that the damping force is generated at a set angle. In this embodiment, the folding spindle structure 10 may adopt fewer structural elements, so as to provide a damping feel for a user, and has a simple structure.

Please refer to fig. 6, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding hinge structure 10 shown in fig. 2 to 4 is that, as shown in fig. 6, the first connecting plate 114, the first link 111 and the second link 112 in the present embodiment are not provided with the cam structures engaged with each other. The damping bracket 131 can rotate under the action of the elastic force to generate a certain frictional damping force, thereby ensuring that the damping force is generated within a set angle. In this embodiment, the folding spindle structure 10 may adopt fewer structural elements, so as to provide a damping feel for a user, and has a simple structure.

Please refer to fig. 7, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle structure 10 shown in fig. 2 is that in this embodiment, the elastic driving assembly 14 may further include a fifth elastic element 1410, a sixth elastic element 1411, a seventh elastic element 1412, an eighth elastic element 1413, and a second abutting plate (not shown in the drawings).

As shown in fig. 7, in the present embodiment, the fifth elastic element 1410 is sleeved on the first cam shaft 142, the sixth elastic element 1411 is sleeved on the second cam shaft 144, the seventh elastic element 1412 is sleeved on the third cam shaft 146, and the eighth elastic element 1413 is sleeved on the fourth cam shaft 148.

Two ends of the fifth elastic element 1410 respectively elastically abut against a surface of the second connecting plate 124 departing from the seventh cam 1233 and the second abutting plate, so as to abut against the limiting piece 15. Two ends of the sixth elastic element 1411 elastically abut against a surface of the second connecting plate 124 departing from the eighth cam 1235 and a second end of the second cam shaft 144, respectively.

Two ends of the seventh elastic element 1412 elastically abut against a surface of the second connecting plate 124 departing from the seventh cam 1233 and the second abutting plate, respectively, so as to abut against the limiting piece 15. Two ends of the eighth elastic element 1413 respectively elastically abut against a surface of the second connecting plate 124 away from the eighth cam 1235 and the second connecting plate, so as to abut against the limiting piece 15. In this embodiment, the fifth elastic element 1410, the sixth elastic element 1411, the seventh elastic element 1412 and the eighth elastic element 1413 may be energy storage springs.

Please refer to fig. 8 and fig. 9, which are schematic structural diagrams of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle structure 10 shown in fig. 2 is that the damping assembly 13 in this embodiment includes a damping bracket 131 and a third cam set 132.

In this embodiment, the damping support 131 is provided with a ninth cam 1321 and a tenth cam 1323 at both ends, and the third cam set 132 may include an eleventh cam 1322 disposed opposite to the ninth cam 1321 and a twelfth cam 1324 disposed opposite to the tenth cam 1323. The ninth cam 1321 and the eleventh cam 1322 are both sleeved on the first cam shaft 142. The tenth cam 1323 and the twelfth cam 1324 are sleeved on the second cam shaft 144.

It is to be understood that the ninth cam 1321 and the tenth cam 1323 are fixed to both ends of the damping bracket 131. The eleventh cam 1322 that rotates coaxially with the third link 121 is fixed to a second end of the third link 121, and the twelfth cam 1324 that rotates coaxially with the fourth link 122 is fixed to a second end of the fourth link 122. The damping bracket 131 is sleeved on the third cam shaft 146 and the fourth cam shaft 148. The damping bracket 131 is disposed adjacent to the first cam link assembly 11.

As shown in fig. 9, in the present embodiment, an eleventh cam 1322 and a twelfth cam 1324 are disposed at two ends of the damping bracket 131. The third cam set 132 may include a ninth cam 1321 disposed to face the eleventh cam 1322 and a tenth cam 1323 disposed to face the twelfth cam 1324, and the eleventh cam 1322 and the twelfth cam 1324 may be fixed to both ends of the damping bracket 131. The ninth cam 1321 that rotates coaxially with the first link 111 is fixed to a second end of the first link 111, and the tenth cam 1323 that rotates coaxially with the second link 112 is fixed to a second end of the second link 112. The damping bracket 131 is sleeved on the third cam shaft 146 and the fourth cam shaft 148. The damping bracket 131 is disposed adjacent to the second cam link assembly 12.

Please refer to fig. 10, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle structure 10 shown in fig. 8 is that, as shown in fig. 10, in the present embodiment, the third cam group 132 includes a ninth cam 1321, a tenth cam 1323, a fifteenth cam 1332, a sixteenth cam 1334, and a damping bracket 131. Wherein, a first double-sided cam and a second double-sided cam are respectively arranged at two ends of the damping bracket 131. The first and second cams are fixed to both ends of the damping bracket 131, the first cam shaft 142 may be inserted through the first cam, and the second cam shaft 144 may be inserted through the second cam. The first double cam may include an eleventh cam 1322 and a thirteenth cam 1331, and the second double cam may include a twelfth cam 1324 and a fourteenth cam 1333.

The ninth cam 1321 is disposed opposite to the eleventh cam 1322, the thirteenth cam 1331 is disposed opposite to the fifteenth cam 1332, the tenth cam 1323 is disposed opposite to the twelfth cam 1324, and the fourteenth cam 1333 is disposed opposite to the sixteenth cam 1334.

In this embodiment, the ninth cam 1321, the eleventh cam 1322, the thirteenth cam 1331 and the fifteenth cam 1332 are all sleeved on the first cam shaft 142, and the tenth cam 1323, the twelfth cam 1324, the fourteenth cam 1333 and the sixteenth cam 1334 are all sleeved on the second cam shaft 144.

The ninth cam 1321 is engaged with the eleventh cam 1322, and the tenth cam 1323 is engaged with the twelfth cam 1324. The thirteenth cam 1331 is engaged with the fifteenth cam 1332, and the fourteenth cam 1333 is engaged with the sixteenth cam 1334. The damping bracket 131 is sleeved on the third cam shaft 146 and the fourth cam shaft 148. The eleventh cam 1322 and the thirteenth cam 1331 are fixed to a first end of the damping bracket 131, and the twelfth cam 1324 and the fourteenth cam 1333 are fixed to a second end of the damping bracket 131.

Based on the embodiments shown in fig. 8 to 10, a larger torque can be obtained in a limited space, and if the space for folding the electronic device 100 is limited, when the elastic force of the elastic member is limited, a larger rotational holding force and a self-flattening or self-closing driving torque can be achieved by increasing the number of pairs of concave cams.

Please refer to fig. 11, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application. The difference from the embodiment of the folding spindle structure 10 shown in fig. 2 is that the damping assembly 13 in this embodiment may include a damping bracket 131, a first friction plate 134, a second friction plate 135 and a third friction plate 136.

The first friction plate 134 is sleeved on the first cam shaft 142, the second cam shaft 144, the third cam shaft 146 and the fourth cam shaft 148, and the first friction plate 134 is arranged close to the first driving gear 181 and the second driving gear 182, that is, the first friction plate 134 at this time is a static friction plate. A first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, a second end of the second friction plate 135 is sleeved on the first cam shaft 142, and a second end of the second friction plate 135 is located between the first friction plate 134 and the damping support 131. That is, the second friction plate 135 is a dynamic friction plate and can rotate coaxially with the first link 111.

The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, the second end of the third friction plate 136 is sleeved on the second cam shaft 144, and the second end of the third friction plate 136 is located between the first friction plate 134 and the damping support 131. That is, the third friction plate 136 is a dynamic friction plate and can rotate coaxially with the second link 112.

Furthermore, in this embodiment, the damping assembly 13 may further include a fourth friction plate, a fifth friction plate and a sixth friction plate, that is, the fourth friction plate may be further disposed between the first friction plate 134 and the first cam link assembly 11, a first end of the fifth friction plate may be sleeved on the first link pin 16, a second end of the fifth friction plate may be sleeved on the first cam shaft 142, and a second end of the fourth friction plate is located between the first friction plate 134 and the fourth friction plate. A first end of the sixth friction plate may be sleeved on the second connecting rod pin 17, a second end of the sixth friction plate may be sleeved on the second cam shaft 144, and the second end of the sixth friction plate is located between the first friction plate 134 and the fourth friction plate.

Please refer to fig. 12, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application. The difference from the embodiment of the folding spindle structure 10 shown in fig. 11 is that the first friction plate 134 is disposed adjacent to the third driving gear 191 and the fourth driving gear 192. A first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, a second end of the second friction plate 135 is sleeved on the first cam shaft 142, and a second end of the second friction plate 135 is located between the first friction plate 134 and the damping support 131. That is, the second friction plate 135 is a dynamic friction plate and can rotate coaxially with the first link 111. The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, the second end of the third friction plate 136 is sleeved on the second cam shaft 144, and the second end of the third friction plate 136 is located between the first friction plate 134 and the damping support 131. That is, the third friction plate 136 is a dynamic friction plate and can rotate coaxially with the second link 112.

Please refer to fig. 13, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application. The difference from the embodiment of the folding rotary shaft structure 10 shown in fig. 11 is that in this embodiment, the damping assembly 13 may further include a fourth friction plate 137, a fifth friction plate 138 and a sixth friction plate 139.

The fourth friction plate 137 is sleeved on the first cam shaft 142, the second cam shaft 144, the third cam shaft 146 and the fourth cam shaft 148, and the fourth friction plate 137 is disposed close to the third driving gear 191 and the fourth driving gear 192. A first end of the fifth friction plate 138 is sleeved on the first connecting rod pin 16, a second end of the fifth friction plate 138 is sleeved on the first cam shaft 142, and a second end of the fifth friction plate 138 is located between the fourth friction plate and the damping support 131. A first end of the sixth friction plate 139 is sleeved on the second connecting rod pin 17, a second end of the sixth friction plate 139 is sleeved on the second cam shaft 144, and a second end of the sixth friction plate 139 is located between the fourth friction plate 137 and the damping support 131.

Based on the embodiments shown in fig. 11 to 12, when the elastic force of the elastic member is limited, a larger intermediate hovering force can be achieved by increasing the number of pairs of friction pairs.

Please refer to fig. 14, which is a schematic structural diagram of a folding hinge structure 10 according to another embodiment of the present application. The difference from the embodiment of the folding rotary shaft structure 10 shown in fig. 8 is that in this embodiment, the damping assembly 13 may further include a first friction plate 134, a second friction plate 135 and a third friction plate 136.

The first friction plate 134 is sleeved on the first cam shaft 142, the second cam shaft 144, the third cam shaft 146 and the fourth cam shaft 148, and the first friction plate 134 is arranged close to the first driving gear 181 and the second driving gear 182. The first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, the second end of the second friction plate 135 is sleeved on the first cam shaft 142, the second end of the second friction plate 135 is located between the first friction plate 134 and the ninth cam 1321, and the ninth cam 1321 is sleeved on the first cam shaft 142. The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, the second end of the third friction plate 136 is sleeved on the second cam shaft 144, and the second end of the third friction plate 136 is located between the tenth cam 1323 and the first friction plate 134.

Please refer to fig. 15, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application. The difference from the embodiment of the folding spindle structure 10 shown in fig. 14 is that, in this embodiment, the first friction plate 134 is disposed adjacent to the third driving gear 191 and the fourth driving gear 192. The first friction plate 134 is sleeved on the first cam shaft 142, the second cam shaft 144, the third cam shaft 146 and the fourth cam shaft 148.

A first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, a second end of the second friction plate 135 is sleeved on the first cam shaft 142, and a second end of the second friction plate 135 is located between the first friction plate 134 and the eleventh cam 1322.

The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, the second end of the third friction plate 136 is sleeved on the second cam shaft 144, and the second end of the third friction plate 136 is located between the twelfth cam 1324 and the first friction plate 134.

In one embodiment, as shown in fig. 16, the first cam shaft 142 and the second cam shaft 144 may each be a flat shaft or a profiled shaft. In other possible embodiments, the third cam shaft 146 and the fourth cam shaft 148 may also be flat shafts or profiled shafts, that is, the shaft hole of the first cam 1132, the shaft hole of the second cam 1134, and the shaft hole of the first synchronizing gear 183 are all flat holes or profiled holes. Due to such a design, it is ensured that the first connecting rod 111 rotates to drive the first cam shaft 142, the second cam shaft 144, the third cam shaft 146 and the fourth cam shaft 148 to rotate together.

Please refer to fig. 17, which is a schematic structural diagram of a folding hinge structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle structure 10 shown in fig. 7 is that, in the present embodiment, the damping assembly 13 includes a damping bracket 131, a first friction plate 134, a second friction plate 135 and a third friction plate 136.

The first end of the first cam shaft 142, the first end of the second cam shaft 144, the first end of the third cam shaft 146, and the first end of the fourth cam shaft 148 are all sleeved with the second friction plate 135 and the third friction plate 136, and the first end of the first elastic member 143, the first end of the second elastic member 145, the first end of the third elastic member 147, and the first end of the fourth elastic member 149 all elastically abut against the third friction plate 136. A first friction plate 134 is respectively sleeved on the first end of the first cam shaft 142, the first end of the second cam shaft 144, the first end of the third cam shaft 146 and the first end of the fourth cam shaft 148, and the first friction plate 134 is located between the second friction plate 135 and the third friction plate 136.

The second end of the first cam shaft 142, the second end of the second cam shaft 144, the second end of the third cam shaft 146, and the second end of the fourth cam shaft 148 are all sleeved with the second friction plate 135 and the third friction plate 136, and the first end of the fifth elastic element 1410, the first end of the sixth elastic element 1411, the first end of the seventh elastic element 1412, and the first end of the eighth elastic element 1413 are all elastically abutted against the third friction plate 136. A first friction plate 134 is respectively sleeved on the second end of the first camshaft 142, the second end of the second camshaft 144, the second end of the third camshaft 146 and the second end of the fourth camshaft 148, and the first friction plate 134 is located between the second friction plate 135 and the third friction plate 136.

In some possible embodiments, the second friction plate 135 may be a first holding plate. In other possible embodiments, a first abutting plate 141 may be further added between the second friction plate 135 and the first ends of the first cam shaft 142, the second cam shaft 144, the third cam shaft 146, and the fourth cam shaft 148, or a first abutting plate 141 may be further added between the third friction plate 136 and the first elastic member 143, the second elastic member 145, the third elastic member 147, and the fourth elastic member 149.

With this arrangement, the second friction plate 135 and the third friction plate 136 are static friction plates and the first friction plate 134 is dynamic friction plate at the distal end of the elastic member, and can rotate together with the first cam shaft 142, the second cam shaft 144, the third cam shaft 146, and the fourth cam shaft 148. Based on the design, the rotary damping force is improved, the rotary intermediate hovering requirement is met, and the damping feeling is provided for a user.

It is understood that, in this embodiment, the folding spindle structure 10 may be provided with a plurality of friction plates on both sides, and in other possible embodiments, the folding spindle structure 10 may also be provided with a plurality of friction plates on one side.

Please refer to fig. 18, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle structure 10 shown in fig. 17 is that in this embodiment, the damping assembly 13 further includes a third cam set 132.

In this embodiment, the third cam set 132 may include a ninth cam 1321 engaged with the first cam 1322 provided opposite to the ninth cam 1321, a tenth cam 1323 engaged with the first cam 1322, and a twelfth cam 1324 provided opposite to the tenth cam 1323. The ninth cam 1321 and the eleventh cam 1322 are both sleeved on the first cam shaft 142. The tenth cam 1323 and the twelfth cam 1324 are sleeved on the second cam shaft 144.

It is understood that the ninth cam 1321 is fixed to the first end of the damping bracket 131 and the tenth cam 1323 is fixed to the second end of the damping bracket 131. The eleventh cam 1322 that rotates coaxially with the third link 121 is fixed to a second end of the third link 121, and the twelfth cam 1324 that rotates coaxially with the fourth link 122 is fixed to a second end of the fourth link 122. The damping bracket 131 is sleeved on the third cam shaft 146 and the fourth cam shaft 148. The damping bracket 131 is disposed near the first cam link assembly 11. In another embodiment, as shown in FIG. 19, the damping bracket 131 may be located proximate to the location of the second cam link assembly 12. The eleventh cam 1322 is fixed to the first end of the damping bracket 131, and the twelfth cam 1324 is fixed to the second end of the damping bracket 131. The ninth cam 1321 that rotates coaxially with the first link 111 is fixed to a second end of the first link 111, and the tenth cam 1323 that rotates coaxially with the second link 112 is fixed to a second end of the second link 112. The damping bracket 131 is sleeved on the third cam shaft 146 and the fourth cam shaft 148.

Please refer to fig. 20, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle structure 10 shown in fig. 18 is that in this embodiment, as shown in fig. 20, the folding spindle structure 10 in this embodiment further includes a fourth cam set 133, and the fourth cam set 133 may include a thirteenth cam 1331 engaged with the fourth cam set 133, a fifteenth cam 1332 disposed opposite to the thirteenth cam 1331, a fourteenth cam 1333 engaged with the fourth cam set 133, and a sixteenth cam 1334 disposed opposite to the fourteenth cam 1333.

Based on the embodiment shown in fig. 17 to 20, when the strength of the dynamic friction plate is limited, the opening and closing torque force is adjusted by arranging the friction pair at the far end to match with the pair of concave cams, the transmission mechanism is simplified, and the space utilization rate is improved.

Please refer to fig. 21, which is a schematic structural diagram of a folding spindle structure 10 according to another embodiment of the present application.

The difference from the embodiment of the folding spindle arrangement 10 shown in fig. 2 is that:

in this embodiment, the folding spindle structure 10 may include a first cam link assembly 11, a second cam link assembly 12, an elastic driving assembly 14, a limiting plate 15, a first link pin 16, a second link pin 17, a first synchronizing assembly 18, and a second synchronizing assembly 19.

The first cam link assembly 11 may include a first link 111, a second link 112, a first cam set 113, and a first link plate 114. The first cam set 113 can include a first cam 1132 engaged with a third cam 1133 disposed opposite the first cam 1132. The first cam set 113 may further include a second cam 1134 engaged with the first cam, and a fourth cam 1135 disposed opposite to the second cam 1134. The third cam 1133 may be disposed at a first end of the first connection plate 114, and the fourth cam 1135 may be disposed at a second end of the first connection plate 114.

The second cam link assembly 12 may include a third link 121, a fourth link 122, a second cam set 123, and a second connecting plate 124. The second cam set 123 may include a fifth cam 1232 engaged with a seventh cam 1233 disposed opposite the fifth cam 1232. The second cam set 123 can also include a sixth cam 1234 engaged with an eighth cam 1235 positioned opposite the sixth cam 1234. The fifth cam 1232 may be disposed at a first end of the second connecting plate 124, and the sixth cam 1234 may be disposed at a second end of the second connecting plate 124.

The first connecting rod 111 is fixedly connected with the third connecting rod 121 through the first connecting rod pin 16, and the second connecting rod 112 is fixedly connected with the fourth connecting rod 122 through the second connecting rod pin 17.

The second end of first connecting rod 111 is fixed with first connecting rod 111 coaxial rotation's first cam 1132, the second end of second connecting rod 112 be fixed with second connecting rod 112 coaxial rotation's second cam 1134, just first cam 1132 with second cam 1134 all are located the same side of first cam link assembly 11. The seventh cam 1233 that rotates coaxially with the third link 121 is fixed to the second end of the third link 121, the eighth cam 1235 that rotates coaxially with the fourth link 122 is fixed to the second end of the fourth link 122, and the seventh cam 1233 and the eighth cam 1235 are located on the same side of the second cam link assembly 12.

The elastic driving assembly 14 includes a first cam shaft 142, a first elastic member 143, a second cam shaft 144, and a second elastic member 145. One end of the first cam shaft 142 may be connected to the position-limiting plate 15, and the other end of the first cam shaft 142 may penetrate through the axis of the first cam 1132 and be connected to the axis of the third cam 1133, and sequentially penetrate through the first connecting plate 114, the first elastic member 143, the second connecting plate 124, the fifth cam 1232, and the seventh cam 1233 to be connected to another position-limiting plate 15. One end of the second cam shaft 144 is connected to the position-limiting plate 15, and the other end of the second cam shaft 144 may penetrate through the axis of the second cam 1134 and be connected to the axis of the fourth cam 1135, and sequentially penetrate through the first connecting plate 114, the second elastic member 145, the second connecting plate 124, the sixth cam 1234, and the eighth cam 1235 to be connected to another position-limiting plate 15. Two ends of the first elastic element 143 elastically abut against a surface of the first connecting plate 114 facing away from the third cam 1133 and a surface of the second connecting plate 124 facing away from the fifth cam 1232, respectively. Two ends of the second elastic member 145 elastically abut against a surface of the first connecting plate 114 departing from the third cam 1133 and a surface of the second connecting plate 124 departing from the fifth cam 1232, respectively.

The first synchronizing assembly 18 may include first and second drive gears 181 and 182 and a double number of first synchronizing gears 183. The first driving gear 181 is fixed at the second end of the first connecting rod 111, and the first driving gear 181 is disposed on a surface of the third cam 1133 facing away from the first cam 1132 and is sleeved on the first cam shaft 142. The second driving gear 182 is fixed at the second end of the second link 112, and the second driving gear 182 may be disposed on a surface of the fourth cam 1135 facing away from the second cam 1134 and sleeved on the second cam shaft 144. The first synchronizing gear 183 may be disposed between the first driving gear 181 and the second driving gear 182. In this application scenario, the adjacent first driving gear 181, the first synchronizing gear 183 and the second driving gear 182 may be engaged with each other.

The second synchronizing assembly 19 may include third and fourth drive gears 191, 192 and a double number of second synchronizing gears 193. The third driving gear 191 is fixed to a second end of the third link 121, and the third driving gear 191 may be sleeved on the first cam shaft 142. The fourth driving gear 192 is fixed to the second end of the fourth connecting rod 122, and the fourth driving gear 192 can be sleeved on the second cam shaft 144. In this application scenario, the third driving gear 191 and the fourth driving gear 192 may mesh with each other. The second synchronizing gear 193 may be disposed between the third driving gear 191 and the fourth driving gear 192. In this application scenario, the adjacent third driving gear 191, the second synchronizing gear 193, and the fourth driving gear 192 may mesh with each other.

In some possible implementations, the elastic driving assembly 14 may further include a third cam shaft 146, a third elastic member 147, a fourth cam shaft 148 and a fourth elastic member 149. The third elastic member 147 and the fourth elastic member 149 are respectively sleeved on the third cam shaft 146 and the fourth cam shaft 148.

One end of the third cam shaft 146 may be connected to the stopper 15, and the other end of the third cam shaft 146 may sequentially penetrate through the first synchronizing gear 183, the first connecting plate 114, the third elastic member 147, the second connecting plate 124, and the second synchronizing gear 193 to be connected to another stopper 15. One end of the fourth cam shaft 148 is connected to the stopper 15, and the other end of the fourth cam shaft 148 may sequentially pass through the first synchronizing gear 183, the first connecting plate 114, the third elastic member 147, the second connecting plate 124, and the second synchronizing gear 193 to be connected to another stopper 15. Two ends of the third elastic element 147 respectively elastically abut against a surface of the first connecting plate 114 departing from the third cam 1133 and a surface of the second connecting plate 124 departing from the fifth cam 1232. Two ends of the fourth elastic element 149 respectively elastically abut against a surface of the first connecting plate 114 departing from the fourth cam 1135 and a surface of the second connecting plate 124 departing from the sixth cam 1234.

In this embodiment, the limiting piece 15 does not rotate along with the rotation of the first link 111 and the second link 112, and the other limiting piece 15 does not rotate along with the rotation of the third link 121 and the fourth link 122. Based on the design, a friction pair can be generated between the limiting piece 15 and the first connecting rod 111 and the second connecting rod 112 to generate a damping force, and a friction pair can be generated between the other limiting piece 15 and the third connecting rod 121 and the fourth connecting rod 122 to generate a damping force.

In another possible embodiment, a friction pair may be disposed between the limiting plate 15 and the first cam link assembly 11, and a friction pair may be disposed between the limiting plate 15 and the second cam link assembly 12.

Based on the embodiment shown in fig. 21, the elastic driving assembly 14 can be disposed at the middle position of the folding spindle structure, and the first connecting plate 114 and the second connecting plate 124 can move to the middle position, and based on such design, the damping effect can be brought to the user when opening and closing.

The folding rotating shaft structure and the folding electronic equipment have friction force between 0-180 degrees, can realize the realization of damping force at a specific angle, can automatically flatten and keep a flattening state when approaching 180 degrees, can automatically close and keep a closing state when approaching 0 degrees, and can freely hover at an intermediate angle of 0-180 degrees. The folding rotating shaft structure and the folding electronic equipment provided by the embodiment of the application can bring a damping effect to a user when being opened and closed, and the application scene of the folding rotating shaft structure is wide.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A folding spindle structure, comprising:

the first cam connecting rod assembly comprises a first connecting rod and a second connecting rod which are symmetrically arranged, and the first connecting rod and the second connecting rod can rotate relative to each other; the first cam set is also included; the first cam group comprises a first cam, a third cam arranged opposite to the first cam, a second cam and a fourth cam arranged opposite to the second cam;

the second end of the first connecting rod is fixedly provided with the third cam which coaxially rotates with the first connecting rod, the second end of the second connecting rod is fixedly provided with the fourth cam which coaxially rotates with the second connecting rod, and the third cam and the fourth cam are positioned on the same side of the first cam connecting rod assembly; the first cam and the second cam do not rotate with the first link and the second link;

the second cam connecting rod assembly comprises a third connecting rod and a fourth connecting rod which are symmetrically arranged, the third connecting rod and the fourth connecting rod can rotate relative to each other, the third connecting rod and the first connecting rod rotate coaxially, and the fourth connecting rod and the second connecting rod rotate coaxially; the first end of the third connecting rod is fixedly connected with the first end of the first connecting rod through a first connecting rod pin shaft, and the first end of the fourth connecting rod is fixedly connected with the first end of the second connecting rod through a second connecting rod pin shaft;

the first synchronous assembly comprises a first driving gear and a second driving gear, the first driving gear is fixed at the second end of the first connecting rod, and the first driving gear is arranged on one surface of the third cam, which is deviated from the first cam; the second driving gear is fixed at the second end of the second connecting rod, the second driving gear is arranged on one surface of the fourth cam, which is far away from the second cam, and the first driving gear and the second driving gear are meshed with each other;

the second synchronous component comprises a third driving gear and a fourth driving gear, the third driving gear is fixed at the second end of the third connecting rod, the fourth driving gear is fixed at the second end of the fourth connecting rod, and the third driving gear and the fourth driving gear are meshed with each other;

the elastic driving component is used for providing elastic driving force so that the first cam and the third cam, and the second cam and the fourth cam can approach each other along the direction of a rotating axis of the rotating connection of the first connecting rod and the second connecting rod;

and the damping assembly comprises a damping bracket, and the damping bracket is arranged between the first cam connecting rod assembly and the second cam connecting rod assembly and rotates under the action of elastic force to generate friction damping force.

2. The folding spindle structure of claim 1, wherein the elastic driving assembly includes a first abutting plate, a first cam shaft, a first elastic member, a second cam shaft, and a second elastic member;

the first camshaft is arranged through the first connecting rod and the third connecting rod, the second camshaft is arranged through the second connecting rod and the fourth connecting rod, so that the first connecting rod and the second connecting rod rotate relative to each other, and the third connecting rod and the fourth connecting rod rotate relative to each other;

the first cam shaft is further arranged through the first cam and the damping support, and the second cam shaft is further arranged through the second cam and the damping support;

the first abutting plate is positioned at one end, far away from the first cam and the second cam, of the first cam shaft and the second cam shaft;

the first elastic piece is sleeved on the first cam shaft, and two ends of the first elastic piece are respectively elastically abutted against one surface of the first cam, which is far away from the third cam, and the first abutting plate;

the second elastic piece is sleeved on the second cam shaft, and two ends of the second elastic piece are respectively elastically abutted against one surface of the second cam, which is far away from the fourth cam, and the first abutting plate.

3. The folding spindle structure of claim 2,

the second cam connecting rod assembly further comprises a second cam group, the folding rotating shaft structure further comprises a limiting piece, and the second cam group comprises a fifth cam, a seventh cam, a sixth cam and an eighth cam, wherein the seventh cam and the sixth cam are arranged opposite to each other; the second end of the third connecting rod is fixed with the seventh cam which coaxially rotates with the third connecting rod, the second end of the fourth connecting rod is fixed with the eighth cam which coaxially rotates with the fourth connecting rod, the seventh cam and the eighth cam are positioned on the same side of the second cam connecting rod assembly, and the fifth cam and the sixth cam do not rotate along with the third connecting rod and the fourth connecting rod;

the limiting piece is located at one end, far away from the fifth cam and the sixth cam, of the first cam shaft and the second cam shaft, and one surfaces, back to the seventh cam and the eighth cam, of the fifth cam and the sixth cam are abutted to the limiting piece.

4. The folding spindle structure of claim 3,

the first synchronous assembly further comprises two first synchronous gears, the two first synchronous gears are arranged between the first driving gear and the second driving gear, and the adjacent first driving gear, the two first synchronous gears and the second driving gear are meshed with each other;

the second synchronizing assembly further comprises two second synchronizing gears, the third driving gear and the fourth driving gear are arranged between the two second synchronizing gears and are adjacent to each other, and the third driving gear, the two second synchronizing gears and the fourth driving gear are meshed with each other.

5. The folding spindle structure of claim 4,

the first cam and the second cam are fixedly connected or integrally formed through a first connecting plate, and the fifth cam and the sixth cam are fixedly connected or integrally formed through a second connecting plate;

the elastic driving assembly further comprises a third cam shaft, a third elastic piece, a fourth cam shaft and a fourth elastic piece;

the third camshaft penetrates through the first connecting plate, the first synchronous gear, the damping support, the second synchronous gear and the second connecting plate;

the fourth camshaft penetrates through the first connecting plate, the other first synchronous gear, the damping bracket, the other second synchronous gear and the second connecting plate;

the third elastic piece is sleeved on the third cam shaft, and two ends of the third elastic piece respectively elastically abut against one surface of the first connecting plate, which is far away from the third cam, and the abutting plate;

the fourth elastic piece is sleeved on the fourth cam shaft, and two ends of the fourth elastic piece are respectively elastically abutted against one surface of the first connecting plate, which is far away from the fourth cam, and the abutting plate.

6. The folding spindle structure of claim 5,

the damping assembly further comprises a third cam set comprising a ninth cam and a tenth cam, the third cam set comprising an eleventh cam disposed opposite the ninth cam and a twelfth cam disposed opposite the tenth cam; the ninth cam and the eleventh cam are both sleeved on the first cam shaft, the tenth cam and the twelfth cam are both sleeved on the second cam shaft, the ninth cam is meshed with the eleventh cam, and the tenth cam is meshed with the twelfth cam;

the ninth cam and the tenth cam are fixed at two ends of the damping support, the first cam shaft penetrates through the ninth cam, and the second cam shaft penetrates through the tenth cam;

the eleventh cam which rotates coaxially with the third connecting rod is fixed at the second end of the third connecting rod, and the twelfth cam which rotates coaxially with the fourth connecting rod is fixed at the second end of the fourth connecting rod; or, the eleventh cam which rotates coaxially with the first link is fixed to the second end of the first link, and the twelfth cam which rotates coaxially with the second link is fixed to the second end of the second link.

7. The folding spindle structure of claim 5,

the damping assembly further comprises a third cam set, the third cam set comprises a ninth cam, a tenth cam, a fifteenth cam and a sixteenth cam, the damping bracket comprises a first double-faced cam and a second double-faced cam, the first double-faced cam is positioned between the ninth cam and the fifteenth cam, the second double-faced cam is positioned between the tenth cam and the sixteenth cam, the first double-faced cam comprises an eleventh cam arranged opposite to the ninth cam and a thirteenth cam arranged opposite to the fifteenth cam, and the second double-faced cam comprises a twelfth cam arranged opposite to the tenth cam and a fourteenth cam arranged opposite to the sixteenth cam; the ninth cam, the eleventh cam, the thirteenth cam and the fifteenth cam are all sleeved on the first cam shaft, and the tenth cam, the twelfth cam, the fourteenth cam and the sixteenth cam are all sleeved on the second cam shaft;

the first double-faced cam and the second double-faced cam are fixed at two ends of the damping bracket, the first cam shaft penetrates through the first double-faced cam, and the second cam shaft penetrates through the second double-faced cam; the ninth cam is engaged with the eleventh cam, the tenth cam is engaged with the twelfth cam, the thirteenth cam is engaged with the fifteenth cam, and the fourteenth cam is engaged with the sixteenth cam;

the second end of the first connecting rod is fixed with the ninth cam which coaxially rotates with the first connecting rod, the second end of the second connecting rod is fixed with the tenth cam which coaxially rotates with the second connecting rod, the second end of the third connecting rod is fixed with the fifteenth cam which coaxially rotates with the third connecting rod, and the second end of the fourth connecting rod is fixed with the sixteenth cam which coaxially rotates with the fourth connecting rod.

8. The folding spindle structure of claim 5,

the damping assembly further comprises a first friction plate, a second friction plate and a third friction plate; the first friction plate is sleeved on the first cam shaft, the second cam shaft, the third cam shaft and the fourth cam shaft, and the first friction plate is arranged close to the first driving gear and the second driving gear; a first end of the second friction plate is sleeved on the first connecting rod pin shaft, a second end of the second friction plate is sleeved on the first camshaft, and a second end of the second friction plate is positioned between the first friction plate and the damping support; the first end of the third friction plate is sleeved on the second connecting rod pin shaft, the second end of the third friction plate is sleeved on the second cam shaft, and the second end of the third friction plate is located between the first friction plate and the damping support.

9. The folding spindle structure of claim 8,

the damping assembly further comprises a fourth friction plate, a fifth friction plate and a sixth friction plate; the fourth friction plate is sleeved on the first cam shaft, the second cam shaft, the third cam shaft and the fourth cam shaft; the fourth friction plate is arranged close to the third driving gear and the fourth driving gear; a first end of the fifth friction plate is sleeved on the first connecting rod pin shaft, a second end of the fifth friction plate is sleeved on the first camshaft, and a second end of the fifth friction plate is positioned between the fourth friction plate and the damping support; the first end of the sixth friction plate is sleeved on the second connecting rod pin shaft, the second end of the sixth friction plate is sleeved on the second camshaft, and the second end of the sixth friction plate is located between the fourth friction plate and the damping support.

10. A folding spindle arrangement according to claim 3,

the elastic driving assembly further comprises a fifth elastic piece, a sixth elastic piece and a second abutting plate;

the fifth elastic piece is sleeved on the first cam shaft, and two ends of the fifth elastic piece respectively and the fifth cam are opposite to one surface of the seventh cam and elastically abut against the second abutting plate so as to abut against the limiting sheet;

the sixth elastic piece is sleeved on the second cam shaft, and two ends of the sixth elastic piece respectively and the sixth cam are opposite to one surface of the eighth cam and the second abutting plate elastically abut against the limiting piece.

11. The folding spindle structure of claim 5,

the elastic driving assembly further comprises a fifth elastic piece, a sixth elastic piece, a seventh elastic piece, an eighth elastic piece and a second abutting plate;

the fifth elastic piece is sleeved on the first cam shaft, and two ends of the fifth elastic piece respectively and elastically abut against one surface of the fifth cam, which is opposite to the seventh cam, and the second abutting plate so as to abut against the limiting sheet;

the sixth elastic piece is sleeved on the second cam shaft, and two ends of the sixth elastic piece respectively and the sixth cam are opposite to one surface of the eighth cam and elastically abut against the second abutting plate so as to abut against the limiting sheet;

the seventh elastic piece is sleeved on the third cam shaft, and two ends of the seventh elastic piece respectively elastically abut against one surface of the second connecting plate, which is far away from the seventh cam, and the second abutting plate so as to abut against the limiting sheet;

the eighth elastic piece is sleeved on the fourth cam shaft, and two ends of the eighth elastic piece respectively elastically abut against one surface of the second connecting plate, which is far away from the eighth cam, and the second abutting plate so as to abut against the limiting piece.

12. The folding spindle structure of claim 10,

the damping assembly further comprises a first friction plate, a second friction plate, a third friction plate, a fourth friction plate, a fifth friction plate and a sixth friction plate;

the second friction plate and the third friction plate are sleeved at one ends, far away from the first cam and the second cam, of the first cam shaft, the second cam, the third cam shaft and the fourth cam shaft; the fifth friction plate and the sixth friction plate are sleeved at one ends, far away from the fifth cam and the sixth cam, of the first cam shaft, the second cam shaft, the third cam shaft and the fourth cam shaft;

one end of each of the first camshaft, the second camshaft, the third camshaft and the fourth camshaft is sleeved with a first friction plate, and the first friction plate is positioned between the second friction plate and the third friction plate; a fourth friction plate is sleeved at the other end of each of the first camshaft, the second camshaft, the third camshaft and the fourth camshaft, and the fourth friction plate is positioned between the fifth friction plate and the sixth friction plate; two ends of the first elastic piece respectively elastically abut against the third friction plate and one surface of the first cam, which is far away from the third cam; two ends of the second elastic piece respectively elastically abut against the third friction plate and one surface of the second cam, which is far away from the fourth cam;

two ends of the fifth elastic piece respectively and elastically abut against the sixth friction plate and one surface of the fifth cam, which is far away from the seventh cam; two ends of the sixth elastic piece respectively elastically abut against the sixth friction plate and one surface of the sixth cam, which is far away from the eighth cam.

13. A folding spindle structure, comprising:

a first limiting sheet;

the first cam connecting rod component comprises a first connecting rod and a second connecting rod which are symmetrically arranged, and the first connecting rod and the second connecting rod can rotate relative to each other; the first cam group is arranged on the first cam; the first cam group comprises a first cam, a third cam arranged opposite to the first cam, a second cam and a fourth cam arranged opposite to the second cam;

the second end of the first connecting rod is fixedly provided with the first cam which coaxially rotates with the first connecting rod, the second end of the second connecting rod is fixedly provided with the second cam which coaxially rotates with the second connecting rod, and the first cam and the second cam are positioned on the same side of the first cam connecting rod assembly;

the second cam connecting rod assembly comprises a third connecting rod and a fourth connecting rod which are symmetrically arranged, the third connecting rod and the fourth connecting rod can rotate relative to each other, the third connecting rod and the first connecting rod rotate coaxially, and the fourth connecting rod and the second connecting rod rotate coaxially; further comprising: the first end of the third connecting rod is fixedly connected with the first end of the first connecting rod through a first connecting rod pin shaft, and the first end of the fourth connecting rod is fixedly connected with the first end of the second connecting rod through a second connecting rod pin shaft; the second cam group comprises a fifth cam, a seventh cam arranged opposite to the fifth cam, a sixth cam and an eighth cam arranged opposite to the sixth cam;

the second end of the third connecting rod is fixed with the seventh cam which coaxially rotates with the third connecting rod, the second end of the fourth connecting rod is fixed with the eighth cam which coaxially rotates with the fourth connecting rod, and the seventh cam and the eighth cam are positioned on the same side of the second cam connecting rod assembly;

the first synchronous assembly comprises a first driving gear and a second driving gear, the first driving gear is fixed at the second end of the first connecting rod, and the first driving gear is arranged on one surface of the third cam, which is deviated from the first cam; the second driving gear is fixed at the second end of the second connecting rod, the second driving gear is arranged on one surface of the fourth cam, which is deviated from the second cam, and the first driving gear and the second driving gear are meshed with each other;

the elastic driving assembly comprises a first elastic piece, a first cam shaft, a second cam shaft and a second elastic piece; two ends of the first elastic piece respectively elastically abut against one surface of the third cam departing from the first cam and one surface of the fifth cam departing from the seventh cam; two ends of the second elastic piece respectively elastically abut against one surface of the fourth cam departing from the second cam and one surface of the sixth cam departing from the eighth cam; the first cam shaft penetrates through the first limiting piece, the first connecting rod and the third connecting rod, and the first cam shaft further penetrates through the first cam and the third cam; the second cam shaft penetrates through the second cam and the fourth cam, and the first limiting piece does not rotate along with the first connecting rod and the second connecting rod.

14. The folding spindle structure of claim 13, further comprising:

the folding rotating shaft structure further comprises a second limiting piece;

the second limiting piece is sleeved at the second ends of the first cam shaft and the second cam shaft, and the second limiting piece does not rotate along with the third connecting rod and the fourth connecting rod.

15. A folding electronic device comprising a flexible screen, a first housing and a second housing, wherein the folding electronic device further comprises a folding hinge structure according to any one of claims 1-12 or a folding hinge structure according to any one of claims 13-14;

the first shell and the second shell rotate relatively or rotate back to back through the folding rotating shaft structure;

the first shell comprises a first surface, the second shell comprises a second surface, the flexible screen continuously covers the first surface of the first shell, the folding rotating shaft structure and the second surface of the second shell, and the flexible screen is fixedly connected with the first surface of the first shell and the second surface of the second shell respectively.