WO2024179142A1

WO2024179142A1 - Seat lifting adjustment mechanism

Info

Publication number: WO2024179142A1
Application number: PCT/CN2023/140110
Authority: WO
Inventors: 任秉文; 孙祝兵; 曹生炜
Original assignee: 浙江联宜电机有限公司
Priority date: 2023-02-28
Filing date: 2023-12-20
Publication date: 2024-09-06
Also published as: CN116268837A

Abstract

A seat lifting adjustment mechanism, comprising an upper support (1), which is connected to a seat, and a lower support (2), which is located below the upper support (1) and is arranged parallel to the upper support (1). A first scissor structure and a second scissor structure that are symmetrically arranged are provided between the upper support (1) and the lower support (2). The first scissor structure and the second scissor structure are provided at the edges of two sides of the upper support (1) and the lower support (2), respectively. The first scissor structure comprises a first scissor arm (31) and a second scissor arm (32), the midpoint of the first scissor arm (31) being hinged to the midpoint of the second scissor arm (32). The second scissor structure comprises a third scissor arm (33) and a fourth scissor arm (34), the midpoint of the third scissor arm (33) being hinged to the midpoint of the fourth scissor arm (34). An electrical push rod (21) used for driving the second scissor arm (32) and the fourth scissor arm (34) to rotate synchronously is provided on the lower support (2). According to the described seat lifting adjustment mechanism, the steps required for adjusting the height of a seat are reduced, operation is simpler and more convenient, multiple instances of trial sitting and adjustment are not needed, and the lifting adjustment of the seat is more convenient.

Description

Seat lift adjustment mechanism

Technical Field

The invention belongs to a lifting and adjusting mechanism, and in particular relates to a seat lifting and adjusting mechanism.

Background Art

In the prior art, many seats have been equipped with a lifting function to accommodate different usage requirements and users of different heights. However, some current seat lifting structures have problems such as small travel and insufficient load-bearing capacity.

A seat lifting mechanism is disclosed in a Chinese patent application with publication number CN106427701A. The seat lifting mechanism comprises an upper support, a lower support, a first support rod, a second support rod, an upper slider, a lower slider, and a transmission rod, wherein the transmission rod is fixedly connected to the bottom of the lower support, the first support rod and the second support rod are cross-hinged at the center, the upper end of the first support rod is hinged to the upper support, the lower end of the first support rod is hinged to the lower slider, the lower slider is slidably connected to the lower support, the upper end of the second support rod is hinged to the upper slider, the lower end of the second support rod is hinged to the lower support, the upper slider is slidably connected to the upper support, the lower slider comprises a lower support connection part and a transmission rod connection part, the lower support connection part is slidably connected to the lower support, and the transmission rod is provided with a transmission member, and the transmission member slidably connects the transmission rod connection part to the transmission rod.

When the seat lifting mechanism is actually used, it is necessary to manually operate the mechanical structure to adjust the overall height of the seat. At the same time, different seat heights need to be locked by bolts. There are many operating steps. It is necessary to try sitting several times before adjusting it to a comfortable height. In addition, it is inconvenient for some patients with limited mobility to operate, and the scope of application is small.

Technical issues

The present invention aims to provide a seat lifting and adjusting mechanism, which solves the problems existing in the prior art, such as many operating steps, troublesome height adjustment, and inconvenient use.

Technical Solutions

The above-mentioned technical objectives of the present invention are mainly solved by the following technical solutions: a seat lifting and adjusting mechanism comprises an upper bracket connected to the seat and a lower bracket located below the upper bracket and arranged parallel to the upper bracket, wherein a first scissor structure and a second scissor structure which are symmetrically arranged with each other are arranged between the upper bracket and the lower bracket, and the first scissor structure and the second scissor structure are respectively arranged at the two side edges of the upper bracket and the lower bracket, the first scissor structure comprises a first scissor arm whose upper end is rotatably connected to the left rear side of the upper bracket and whose lower end is slidably connected to the left side of the lower bracket, and a second scissor arm whose upper end is slidably connected to the left side of the upper bracket and whose lower end is rotatably connected to the left rear side of the lower bracket, the first scissor arm is hinged at the midpoint of the first scissor arm and the midpoint of the second scissor arm, and the second scissor structure comprises an upper end rotatably connected to the right rear side of the upper bracket and whose lower end is slidably connected to the right side of the lower bracket The third scissors arm is dynamically connected and the fourth scissors arm is slidingly connected to the right side of the upper bracket and rotationally connected to the right rear side of the lower bracket at the upper end. The third scissors arm is hinged at the midpoint of the third scissors arm and the midpoint of the fourth scissors arm. The lower bracket is provided with an electric push rod for driving the second scissors arm and the fourth scissors arm to rotate synchronously. The setting of the above-mentioned first scissors structure and the second scissors structure can support the upper bracket, and can move up and down through the cooperation of the first scissors structure and the second scissors structure to achieve the effect of height adjustment, and the electric push rod can drive the second scissors arm and the fourth scissors arm to flip, so that the first scissors arm and the third scissors arm rotate synchronously around the hinge point, thereby realizing automatic lifting of the seat, making the lifting and adjustment of the seat simpler, and the height can be adjusted while sitting on the seat without multiple trial sitting and adjustment, making the lifting and adjustment more convenient.

Preferably, the upper bracket includes a first horizontal bar and a second horizontal bar which are parallel to each other on the left and right sides, a first guide wheel and a second guide wheel are respectively provided on the inner sides of the upper ends of the second scissors arm and the fourth scissors arm, and a first guide groove and a second guide groove are respectively provided on the inner sides of the first horizontal bar and the second horizontal bar, and the first guide wheel and the second guide wheel can slide in the first guide groove and the second guide groove respectively; the above-mentioned first guide wheel can slide in the first guide groove, and the second guide wheel can slide in the second guide groove, thereby realizing the movement of the lower ends of the second scissors arm and the fourth scissors arm, and playing a guiding role, so that the movement of the lower ends of the second scissors arm and the fourth scissors arm is more stable and smooth.

Preferably, the lower bracket comprises two left and right third cross bars and a fourth cross bar parallel to each other, a third guide wheel and a fourth guide wheel are respectively provided on the inner sides of the lower ends of the first scissors arm and the third scissors arm, the inner sides of the third cross bar and the fourth cross bar are respectively provided with a third guide groove and a fourth guide groove, the third guide wheel and the fourth guide wheel can slide in the third guide groove and the fourth guide groove respectively; the third guide wheel can slide in the third guide groove, and the fourth guide wheel can slide in the fourth guide groove, thereby realizing the movement of the lower ends of the first scissors arm and the third scissors arm and playing a guiding role, so that the movement of the lower ends of the first scissors arm and the third scissors arm is more stable and smooth, and at the same time cooperate with the third guide wheel and the fourth guide wheel, so that the first scissors arm, the second scissors arm, the third scissors arm and the fourth scissors arm can move synchronously, thereby ensuring the stable lifting and lowering movement of the upper bracket.

Preferably, a first strut is connected between the first scissors arm and the third scissors arm, and a second strut is connected between the second scissors arm and the fourth scissors arm; the first strut is arranged to support the first scissors arm and the third scissors arm, so as to avoid the first scissors arm and the third scissors arm shifting inwards and causing structural distortion, thereby affecting normal movement, and the second strut is arranged to support the second scissors arm and the fourth scissors arm, so as to avoid the second scissors arm and the fourth scissors arm shifting inwards and causing structural distortion, thereby affecting normal lifting movement.

Preferably, a rotating shaft is connected between the third horizontal bar and the fourth horizontal bar, and the rotating shaft can drive the second scissors arm and the fourth scissors arm to flip synchronously. The fixed end of the electric push rod can rotate up and down on the lower bracket, and the output end of the electric push rod can control the rotation of the rotating shaft; the above-mentioned rotating shaft can drive the second scissors arm and the fourth scissors arm to flip synchronously through the drive of the electric push rod, thereby driving the first scissors arm and the third scissors arm to move synchronously to realize lifting movement.

Preferably, the driving direction of the electric push rod is perpendicular to the axial direction of the rotating shaft, and a first connecting rod and a second connecting rod connected to the rotating shaft are respectively provided on both sides of the output end of the electric push rod, the lower ends of the first connecting rod and the second connecting rod are rigidly connected to the rotating shaft, and a pin shaft passing through the output end of the electric push rod is provided between the upper ends of the first connecting rod and the second connecting rod; the output section of the above-mentioned electric push rod can push the first connecting rod and the second connecting rod through the pin shaft, and drive the rotating shaft to rotate through the transmission of the first connecting rod and the second connecting rod, thereby converting the linear motion into rotational motion, so that the electric push rod can control the lifting and lowering motion of the upper bracket through the rotating shaft, and at the same time, the setting of the first connecting rod and the second connecting rod can limit the travel range of the electric push rod, thereby controlling the rotatable angle of the rotating shaft, so that the driving range of the electric push rod is within the normal controllable range.

Preferably, a first connecting arm and a second connecting arm are respectively provided on the side walls at both ends of the rotating shaft, one end of the first connecting arm is rigidly connected to the rotating shaft, the other end of the first connecting arm is provided with a third connecting arm which can rotate up and down, the end of the third connecting arm is rotationally connected to the lower half of the second scissors arm, one end of the second connecting arm is rigidly connected to the rotating shaft, the other end of the second connecting arm is provided with a fourth connecting arm which can rotate up and down, the end of the fourth connecting arm is rotationally connected to the fourth scissors arm; the above-mentioned first connecting arm and the third connecting arm are connected to the rotating shaft and the second scissors arm for transmission, and the second connecting arm and the fourth connecting arm are connected to the rotating shaft and the fourth scissors arm for transmission, so that the electric push rod can transmit the flipping of the second scissors arm through the first connecting arm and the third connecting arm, and transmit the flipping of the fourth scissors arm through the second connecting arm and the fourth connecting arm. The above-mentioned structure increases the torque and shortens the travel required for the output rod of the electric push rod to travel, so that the electric push rod can drive the second scissors arm to perform sufficient movement in a smaller space, saves space, and ensures sufficient torque drive.

Beneficial Effects

Therefore, the present invention has the characteristics of reducing the steps required for adjusting the height of the seat, being easier to operate, and not requiring multiple trial sitting and adjustment, making the lifting and lowering adjustment of the seat more convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a three-dimensional structural diagram of the present invention;

FIG2 is a schematic diagram of a portion of the structure of FIG1;

FIG. 3 is a schematic structural diagram of FIG. 2 from another viewing angle.

Best Mode for Carrying Out the Invention

The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

As shown in Fig. 1-2, a seat lifting and adjusting mechanism comprises an upper bracket 1 connected to the seat and a lower bracket 2 located below the upper bracket 1 and arranged parallel to the upper bracket 1, a first scissor structure and a second scissor structure arranged symmetrically with each other are arranged between the upper bracket 1 and the lower bracket 2, the first scissor structure and the second scissor structure are arranged at the edges of both sides of the upper bracket 1 and the lower bracket 2, the first scissor structure comprises a first scissor arm 31 whose upper end is rotatably connected to the left rear side of the upper bracket 1 and whose lower end is slidably connected to the left side of the lower bracket 2, and a first scissor arm 31 whose upper end is slidably connected to the left side of the upper bracket 1 and whose lower end is slidably connected to the lower bracket 2 The second scissors arm 32 is rotatably connected to the left rear side of the frame 2, and the first scissors arm 31 is hinged at the midpoint of the second scissors arm 32. The second scissors structure includes a third scissors arm 33 that is rotatably connected to the right rear side of the upper bracket 1 at the upper end and is slidably connected to the right side of the lower bracket 2 at the lower end, and a fourth scissors arm 34 that is slidably connected to the right side of the upper bracket 1 at the upper end and is rotatably connected to the right rear side of the lower bracket 2 at the lower end. The midpoints of the third scissors arm 33 and the midpoints of the fourth scissors arm 34 are hinged, and the lower bracket 2 is provided with an electric push rod 21 for driving the second scissors arm 32 and the fourth scissors arm 34 to rotate synchronously.

A seat is placed on the top of the upper bracket, and the first scissors structure and the second scissors structure are located at the two side edges of the upper bracket and the lower bracket respectively. The electric push rod is arranged between the first scissors structure and the second scissors structure. The electric push rod first drives the second scissors arm and the fourth scissors arm to flip, and the second scissors arm and the fourth scissors arm drive the first scissors arm and the third scissors arm to tilt synchronously through the hinge structure, thereby realizing the lifting movement of the upper bracket. The height adjustment of the seat can be controlled by only controlling the start and stop of the electric push rod.

As shown in Figures 2-3, the upper bracket 1 includes two left and right parallel first horizontal bars 11 and second horizontal bars 12, the inner sides of the upper ends of the second scissor arms 32 and the inner sides of the upper ends of the fourth scissor arms 34 are respectively provided with a first guide wheel 321 and a second guide wheel 341, the inner sides of the first horizontal bars 11 and the inner sides of the second horizontal bars 12 are respectively provided with a first guide groove 111 and a second guide groove 121, the first guide wheel 321 and the second guide wheel 341 can slide in the first guide groove 111 and the second guide groove 121 respectively, the lower bracket 2 includes two left and right parallel third horizontal bars 22 and a third guide wheel 341, Four cross bars 23, the third guide wheel 311 and the fourth guide wheel 331 are respectively provided on the inner sides of the lower ends of the first scissor arm 31 and the third scissor arm 33, the third guide groove 221 and the fourth guide groove 231 are respectively provided on the inner sides of the third cross bar 22 and the fourth cross bar 23, the third guide wheel 311 and the fourth guide wheel 331 can slide in the third guide groove 221 and the fourth guide groove 231 respectively, the first strut 35 is connected between the first scissor arm 31 and the third scissor arm 33, and the second strut 36 is connected between the second scissor arm 32 and the fourth scissor arm 34.

The above-mentioned first guide wheel and second guide wheel are respectively located at the upper ends of the second scissors arm and the fourth scissors arm and are rotatable, the third guide wheel and the fourth guide wheel are respectively located at the lower ends of the first scissors arm and the third scissors arm and are rotatable, when the second scissors arm and the fourth scissors arm are driven to flip, the first guide wheel and the second guide wheel move in the first guide groove and the second guide groove, thereby bringing about a height change of the upper bracket, and the first scissors arm and the third scissors arm play a role of auxiliary support, when the second scissors arm and the fourth scissors arm flip, the first scissors arm and the third scissors arm rotate synchronously around the hinge, and the third guide wheel and the fourth guide wheel move in the third guide groove and the fourth guide groove, the setting position of the first support rod and the second support rod can avoid contact with the electric push rod and other components when each scissors arm moves, so as to avoid interference.

As shown in FIG3 , a rotating shaft 24 is connected between the third horizontal bar 22 and the fourth horizontal bar 23, and the rotating shaft 24 can drive the second scissor arm 32 and the fourth scissor arm 34 to flip synchronously. The fixed end of the electric push rod 21 can rotate up and down on the lower bracket 2, and the output end of the electric push rod 21 can control the rotation of the rotating shaft 24. The driving direction of the electric push rod 21 is perpendicular to the axial direction of the rotating shaft 24. The first connecting rod 241 and the second connecting rod 242 connected to the rotating shaft 24 are respectively provided on both sides of the output end of the electric push rod 21. The lower ends of the first connecting rod 241 and the second connecting rod 242 are rigidly connected to the rotating shaft 24. The first connecting rod 241 and the second connecting rod 242 are A pin shaft 243 passing through the output end of the electric push rod 21 is provided between the upper ends, and a first connecting arm 244 and a second connecting arm 245 are respectively provided on the side walls at both ends of the rotating shaft 24. One end of the first connecting arm 244 is rigidly connected to the rotating shaft 24, and the other end of the first connecting arm 244 is provided with a third connecting arm 246 that can rotate up and down. The end of the third connecting arm 246 is rotatably connected to the lower half of the second scissor arm 32, one end of the second connecting arm 245 is rigidly connected to the rotating shaft 24, and the other end of the second connecting arm 245 is provided with a fourth connecting arm 247 that can rotate up and down, and the end of the fourth connecting arm 247 is rotatably connected to the fourth scissor arm 34.

When the electric push rod is started, the output rod of the electric push rod pushes the pin shaft, and the pin shaft drives the first connecting rod and the second connecting rod to flip around the rotating shaft, and the fixed end of the electric push rod rotates slightly with the rotation of the rotating shaft. The rotation of the rotating shaft drives the first connecting arm and the second connecting arm to flip, and the first connecting arm and the second connecting arm drive the second scissors arm and the fourth scissors arm to flip through the third connecting arm and the fourth connecting arm respectively, thereby realizing the lifting and lowering control of the upper bracket.

Claims

A seat lifting and adjusting mechanism, characterized in that it comprises an upper bracket (1) connected to a seat and a lower bracket (2) located below the upper bracket (1) and arranged parallel to the upper bracket (1), a first scissor structure and a second scissor structure arranged symmetrically between the upper bracket (1) and the lower bracket (2), the first scissor structure and the second scissor structure being arranged at the edges of both sides of the upper bracket (1) and the lower bracket (2), respectively, the first scissor structure comprising a first scissor arm (31) having an upper end rotatably connected to the left rear side of the upper bracket (1) and a lower end slidably connected to the left side of the lower bracket (2), and a second scissor arm (32) having an upper end slidably connected to the left side of the upper bracket (1) and a lower end slidably connected to the left rear side of the lower bracket (2). The second scissor arm (32) is hinged at the midpoint of the first scissor arm (31) and the midpoint of the second scissor arm (32), the second scissor structure comprises a third scissor arm (33) whose upper end is rotatably connected to the right rear side of the upper bracket (1) and whose lower end is slidably connected to the right side of the lower bracket (2), and a fourth scissor arm (34) whose upper end is slidably connected to the right side of the upper bracket (1) and whose lower end is rotatably connected to the right rear side of the lower bracket (2), the midpoint of the third scissor arm (33) and the midpoint of the fourth scissor arm (34) are hinged, and the lower bracket (2) is provided with an electric push rod (21) for driving the second scissor arm (32) and the fourth scissor arm (34) to rotate synchronously.
The seat lifting and adjusting mechanism according to claim 1 is characterized in that: the upper bracket (1) comprises two mutually parallel first and second horizontal bars (11) and (12) on the left and right; the inner sides of the upper ends of the second scissor arms (32) and the fourth scissor arms (34) are respectively provided with a first guide wheel (321) and a second guide wheel (341); the inner sides of the first horizontal bar (11) and the second horizontal bar (12) are respectively provided with a first guide groove (111) and a second guide groove (121); the first guide wheel (321) and the second guide wheel (341) can slide in the first guide groove (111) and the second guide groove (121), respectively.
The seat lifting and adjusting mechanism according to claim 1 is characterized in that: the lower bracket (2) includes two left and right third horizontal bars (22) and fourth horizontal bars (23) parallel to each other, the inner sides of the lower ends of the first scissors arm (31) and the third scissors arm (33) are respectively provided with a third guide wheel (311) and a fourth guide wheel (331), the inner sides of the third horizontal bars (22) and the fourth horizontal bars (23) are respectively provided with a third guide groove (221) and a fourth guide groove (231), and the third guide wheel (311) and the fourth guide wheel (331) can slide in the third guide groove (221) and the fourth guide groove (231), respectively.
The seat lifting and adjusting mechanism according to any one of claims 1 to 3 is characterized in that a first strut (35) is connected between the first scissors arm (31) and the third scissors arm (33), and a second strut (36) is connected between the second scissors arm (32) and the fourth scissors arm (34).
The seat lifting and adjusting mechanism according to claim 3 is characterized in that: a rotating shaft (24) is connected between the third horizontal bar (22) and the fourth horizontal bar (23), and the rotating shaft (24) can drive the second scissors arm (32) and the fourth scissors arm (34) to flip synchronously, and the fixed end of the electric push rod (21) can rotate up and down on the lower bracket (2), and the output end of the electric push rod (21) can control the rotation of the rotating shaft (24).
The seat lifting and adjusting mechanism according to claim 5 is characterized in that: the driving direction of the electric push rod (21) is perpendicular to the axial direction of the rotating shaft (24), and a first connecting rod (241) and a second connecting rod (242) connected to the rotating shaft (24) are respectively provided on both sides of the output end of the electric push rod (21), the lower ends of the first connecting rod (241) and the second connecting rod (242) are rigidly connected to the rotating shaft (24), and a pin shaft (243) passing through the output end of the electric push rod (21) is provided between the upper ends of the first connecting rod (241) and the second connecting rod (242).
The seat lifting and adjustment mechanism according to claim 5 is characterized in that: a first connecting arm (244) and a second connecting arm (245) are respectively provided on the side walls at both ends of the rotating shaft (24), one end of the first connecting arm (244) is rigidly connected to the rotating shaft (24), and the other end of the first connecting arm (244) is provided with a third connecting arm (246) that can rotate up and down, and the end of the third connecting arm (246) is rotatably connected to the lower half of the second scissors arm (32), one end of the second connecting arm (245) is rigidly connected to the rotating shaft (24), and the other end of the second connecting arm (245) is provided with a fourth connecting arm (247) that can rotate up and down, and the end of the fourth connecting arm (247) is rotatably connected to the fourth scissors arm (34).