WO2023231205A1

WO2023231205A1 - Periscope lens driving apparatus, camera apparatus, and mobile terminal

Info

Publication number: WO2023231205A1
Application number: PCT/CN2022/116409
Authority: WO
Inventors: 龚高峰; 王建华; 凌彩盛
Original assignee: 上海比路电子股份有限公司
Priority date: 2022-05-31
Filing date: 2022-09-01
Publication date: 2023-12-07
Also published as: CN114911025A; CN114911025B

Abstract

A periscope lens driving apparatus, comprising a prism (4), a lens carrier (5) for fixing a lens (3), an integrated base (7), and a driving unit for the prism (4) and the lens carrier (5). The lens (4) and the lens carrier (5) are both provided on the integrated base (7); the prism (4) is fixed on a prism holder (6); the integrated base (7) supports the prism holder (6) by means of a three-degree-of-freedom rotary supporting mechanism. In the periscope lens driving apparatus, the prism (4) and the prism carrier (5) are both mounted on the integrated base (7), so that the assembly of a reflection module and a lens module during mounting is avoided, and the difficulty of assembling and debugging of two motors is reduced; the prism (4) is fixed on the prism holder (6); the integrated base (7) supports the prism holder (6) by means of the three-degree-of-freedom rotary supporting mechanism; the structure is simple, in addition, driving resistance is reduced, and power consumption is reduced.

Description

A periscope lens driving device, camera device and mobile terminal

Technical field

The present invention relates to the field of anti-shake motors, and in particular to a periscope lens driving device; and a camera device and a mobile terminal equipped with the periscope lens driving device.

Background technique

With the development of technology, many electronic devices today, such as tablets or smartphones, are equipped with lens modules and have camera or video functions. Lenses can be roughly divided into short focal length wide-angle lenses and long focal length telephoto lenses; however, placing a long focal length lens in an optical module will increase the thickness of the electronic device, making it difficult to meet the thinning and lightness requirements of mobile terminal devices. In the prior art, a periscope design is usually adopted, that is, the optical path is laid flat and a turning mirror is added to rotate the optical path 90 degrees, so that the entire optical system lies flat to reduce the overall height.

The existing periscope lens driving device includes a reflection module (prism motor) and a lens module (zoom motor). The reflection module reflects the imaging light 90° and then enters the lens module, and the lens module performs focusing and imaging. . At present, the anti-shake solution of the periscope module is performed by the reflective module and the lens module, respectively or jointly, responsible for anti-shake in two directions. Therefore, lens focusing and anti-shake need to be driven by the reflective module and the lens module. There are two groups. It is difficult to assemble and debug the motor, and the large number of drive device parts and complex design lead to problems such as large structural size and low reliability.

Technical solutions

The purpose of the present invention is to provide a periscope lens driving device that has a novel and unique structure, is easy to use, and can reduce the difficulty of assembly and debugging; the specific technical solution is as follows.

A periscope lens driving device, including a prism, a lens carrier for fixing the lens, an integrated base, and a driving unit for the prism and the lens carrier; both the prism and the lens carrier are arranged on the integrated base; the prism is fixed On the prism frame, the integrated base supports the prism frame through a 3-degree-of-freedom rotating support mechanism.

Furthermore, the lens carrier and the integrated base are slidingly connected, and no elastic connecting piece is provided between the lens carrier and the integrated base.

Further, the 3-degree-of-freedom rotation support mechanism is composed of a prism frame ball seat and a prism frame ball that are respectively located at the bottom of the inner cavity of the integrated base and the bottom of the prism frame.

Further, the integrated base and the prism frame are provided with driving units that respectively drive the prism frame to rotate around the X-axis, the Y-axis or the X-axis and the Z-axis.

Further, the driving unit includes a driving coil, a magnet, and a Hall device that detects the position of the magnet; the magnetic conductive sheet and the magnet are fixed on the moving part, and the driving coil is fixed on the stationary part.

Furthermore, the drive unit further includes a magnetically conductive sheet, which is disposed on a side of the magnet away from the drive coil.

The invention also discloses a camera device equipped with the above-mentioned periscope lens driving device.

The invention also discloses a mobile device equipped with the above-mentioned periscope lens driving device.

The periscope lens driving device of the present invention installs the prism and the lens carrier on an integrated base; it reduces the alignment process during the assembly process, facilitates assembly, and improves the yield. At the same time, it can effectively reduce the production cost and device size, and achieve The purpose of cost saving and miniaturization; the prism is fixed on the prism frame, and the integrated base supports the prism frame through a 3-degree-of-freedom (orthogonal X-axis, Y-axis, Z-axis) rotating support mechanism; the structure is simple and reduces the cost Reduce driving resistance and reduce power consumption.

Description of the drawings

Figure 1 is a schematic structural diagram of the periscope lens driving device of the present invention;

Figure 2 is a schematic diagram of the prism motor structure;

Figure 3 is an exploded schematic diagram of the structure of Figure 1;

Figure 4 is a schematic structural diagram of the prism motor viewed from above;

Figure 5 is a schematic diagram 2 of the prism motor structure;

Figure 6 is a schematic diagram of the zoom motor structure;

Figure 7 is a schematic diagram 2 of the zoom motor structure;

Figure 8 is a schematic diagram 3 of the zoom motor structure;

Figure 9 is a schematic diagram of the lens carrier structure.

In the picture: 1. Housing; 2. Support; 3. Lens; 4. Prism; 5. Lens carrier; 501. Lens carrier ball groove; 502. Anti-collision boss; 503. Guide groove; 51. Lens drive unit ; 511. Lens driven magnetic sheet; 512. Lens driven magnet; 513. Lens driven coil; 514. Lens driven Hall chip; 52. Lens sliding ball; 53. Lens magnetic plate; 6. Prism holder; 601. Prism Front limit of the frame; 602, rear limit of the prism frame; 61, first drive unit of the prism; 611, first drive magnetic sheet of the prism; 612, first drive magnet of the prism; 613, first drive coil of the prism; 62, prism Second drive unit; 621, prism second drive magnetic sheet; 622, prism second drive magnet; 623, prism second drive coil; 624, prism second drive Hall chip; 63, prism frame ball; 64, prism Support ball; 7. Integrated base; 71. Back baffle; 711. Guide plate; 72. Front baffle; 73. Ball sliding groove; 74. Prism support ball seat; 75. Prism frame ball seat; 8. FPCB board.

Embodiments of the invention

The present invention will be more fully described below using examples. This invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

For ease of explanation, spatially relative terms such as "upper", "lower", "left" and "right" may be used herein to describe the relationship of one element or feature to another element or feature illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" may encompass both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

As shown in Figures 1 and 3, the periscope lens driving device in this embodiment mainly consists of a housing 1, a support 2, a prism 4, a lens carrier 5, an integrated base and a driving unit that drives the prism 4 to drive the lens. The drive unit of carrier 5; also consists of FPC. Among them, the prism 4 is used to change the direction of the light beam passing through the lens 3 through reflection, and projects it to the image sensor through the lens 3; the lens 3 is fixed on the lens carrier 5. In this embodiment, the prism 4 and the lens carrier 5 are both arranged on the integrated base 7; the prism motor and the zoom motor share the same base and FPCB board 8; the alignment process during the assembly process is reduced, assembly is convenient, and the yield rate is improved. At the same time, it can effectively reduce production costs and device size, achieving cost savings and miniaturization.

The lens carrier 5 and the integrated base 7 are connected in a sliding manner, and no elastic connectors such as springs are provided between the lens carrier 5 and the integrated base 7; the power consumption is low, the parts are few, the structure is simplified, and it is convenient for assembly and miniaturization.

As shown in Figures 6 to 9, the integrated base 7 is provided with a ball sliding groove 73; there is at least one ball sliding groove 73 on the left and right sides of the integrated base 7. The bottom of the lens carrier 5 is provided with at least three lens carrier ball grooves 501 for placing lens sliding balls 52; the lens sliding balls 52 are respectively arranged in the ball sliding grooves 73 on both sides. Three lens sliding balls 52 are used to form a support plane to avoid up and down shaking and make the lens carrier 5 slide more smoothly horizontally.

A slider can also be used to support the lens carrier 5, or a material with a low friction coefficient can be used on one or both sides of the contact surface between the lens carrier 5 and the integrated base 7 to reduce the friction between the lens carrier 5 and the integrated base 7; PTFE sheet.

A lens magnetic plate 53 is provided at the bottom of the integrated base 7. The adsorption force generated between the lens magnetic plate 53 and the lens driving magnet 512 generates pressure on the lens sliding ball 52 to prevent the lens sliding ball 52 from escaping from the ball sliding groove 73; it is possible Make the lens carrier 5 slide more smoothly. The adsorption force is set to 5-10 times the mass of the mover carried by the lens carrier.

The lens carrier 5 is driven by the lens driving unit 51 to move along the Z-axis direction to change the focal length of the lens 3 . The lens driving unit 51 includes a lens driving magnet 512 , a lens driving coil 513 and a lens driving Hall chip 514 . The lens driving magnet 512 is fixed on the lens carrier 5; the lens driving Hall chip 514 is fixed on the FPCB board 8 and is used to feedback the position of the lens carrier 5 by detecting changes in the magnetic field caused by the movement of the lens driving magnet 512; the control circuit is driven according to the lens The feedback signal from the Hall chip 514 adjusts the current of the lens driving coil 513 and drives the lens driving magnet 512 to move to a designated position.

On the side of the lens driving magnet 512 away from the lens driving coil 513, a lens driving magnetic permeable piece 511 is also provided. The lens driving magnetic permeable piece 511 is made of magnetic material, which is conducive to enhancing the magnetic field intensity and forming a larger thrust force.

The integrated base 7 is provided with a front baffle 72 and a rear baffle 71 to respectively prevent the lens carrier 5 from exceeding the limits at the front and rear ends. An anti-collision boss 502 is provided on the lens carrier 5 on the side corresponding to the front baffle 72 and the rear baffle 71 . , the anti-collision boss 502 can be a soft rubber embedded in the lens carrier 5, such as TPU material integrally molded on the lens carrier 5 through injection molding.

The integrated base 7 has a guide plate 711 extending along the Z-axis direction on the rear baffle 71. The lens carrier 5 is provided with a guide groove 503 at a corresponding position. The guide plate 711 has a clearance fit with the guide groove 503. When impacted by an external force, it can It plays the role of limiting and protecting the lens carrier 5 .

As shown in Figures 4 and 5, the prism 4 is fixed on the prism frame 6, and the integrated base 7 supports the prism frame 6 through a 3-degree-of-freedom rotation support mechanism. The support of the 3-degree-of-freedom rotation support mechanism allows the prism frame 6 to rotate More flexible and less rotational resistance. Of course, various methods can be used to implement the 3-DOF rotation support mechanism; for example, a hemispherical protrusion or a conical protrusion is provided at the bottom of the prism frame 6 . In this embodiment, a prism frame ball seat 75 is provided at the bottom of the inner cavity of the integrated base 7; a prism frame ball seat 75 is also provided at the bottom of the prism frame 6; the prism frame balls 63 are used to cooperate with the prism frame ball seats 75 above and below to form a X, Y, Z axis 3-degree-of-freedom rotating support mechanism; during maintenance, only the prism frame ball 63 needs to be replaced; making maintenance simpler and more convenient.

The integrated base 7 and the prism frame 6 are provided with drive units that respectively drive the prism frame 6 to rotate around the X-axis and the Z-axis: a first prism drive unit 61 and a second prism drive unit 62; a second prism drive unit. 62 The driving part is arranged at the bottom of the inner cavity of the integrated base 7; the magnet part is arranged at the bottom of the prism frame 6; the prism second driving coil 623 of the driving part drives the prism second driving magnet 622 to rotate around the X-axis. The driving part of the prism first driving unit 61 is arranged on the side wall of the inner cavity of the integrated base 7; the magnet part is arranged on the side wall of the prism frame 6; the prism first driving coil 613 of the driving part drives the prism first driving magnet 612 to rotate around the Z-axis. Rotate the first prism driving magnet 612 90 degrees; then the first prism driving coil 613 of the driving part drives the first prism driving magnet 612 to rotate around the Y axis. The first prism driving unit 61 is also provided with a first prism driving Hall chip and a first prism driving magnetic conductive sheet 611; similarly, the second prism driving unit 62 is also provided with a second prism driving Hall chip 624 and a second prism driving Hall chip 624. Drive the magnetic conductive piece 621.

In Figure 2, two sets of second prism driving units 62 are provided at the bottom of the inner cavity of the integrated base 7; a set of second prism driving units 62 can also be used to drive the second prism driving magnet 622 to rotate around the X-axis.

The positions of the first prism driving unit 61 and the second prism driving unit 62 can also be adjusted, so that the second prism driving unit 62 is arranged on the side wall and the first prism driving unit 61 is arranged on the bottom.

The first prism driving unit 61 and the second prism driving unit 62 drive the prism frame 6 to rotate around the X-axis and the Z-axis with the prism frame ball 63 as the center; or both the rotation around the X-axis and the Y-axis can be realized. Image stabilization.

There is sufficient space between the front, rear, left and right walls of the inner cavity of the prism frame 6 and the integrated base 7 as well as the bottom wall and the inner wall of the support 2 to ensure that the prism frame 6 can rotate with three degrees of freedom with the prism frame ball 63 as the center. A horizontally extending front limiter 601 of the prism frame can also be set at the front of the prism; a horizontally extending rear limiter 602 of the prism frame can be set at the rear; two protruding limiter structures can control the 3-degree-of-freedom rotation of the prism frame 6 Limiting, the support 2 vertically limits the prism frame 6 to prevent the prism frame ball 63 from breaking away from the prism frame ball seat 75.

Two prism support ball seats 74 are also provided on the bottom side of the rear end of the prism frame 6 for placing the prism support balls 64; the integrated base 7 is also provided with two prism support ball seats 74 correspondingly. Since the center of gravity is backward, the two prism support balls 64 and the prism frame balls 63 form a support plane to support the prism frame 6; on the other hand, the diameter of the prism support balls 64 should be greater than 3 times the pitching range of the prism frame 6. When the device is in a non-upright posture, the prism support ball 64 cooperates with the prism support ball seat 74 to limit the changing range of the prism frame 6 .

The periscope lens driving device in this embodiment eliminates the complex spring structure of the existing focusing and anti-shake driving device and uses balls to directly replace it. This not only supports the carrier, but also drives the carrier to perform focusing and anti-shaking movements at the same time. The structure is simple, while reducing the driving resistance and power consumption; the balls replace the front and rear spring connection methods, the driving resistance is small, the power consumption is low, the parts are few, the structure is simplified, and it is convenient for assembly and miniaturization.

The prism motor and the zoom motor share the same base and FPCB board 8, which reduces the alignment process during assembly, facilitates assembly, and improves yield. At the same time, it can effectively reduce production costs and device size, achieving cost savings and miniaturization.

The two driving components of the prism motor and the zoom motor are respectively sensed by Hall chips to achieve closed-loop control to achieve the purpose of high-precision focusing and anti-shake driving.

The first drive unit (drive coil, Hall chip) and the second drive unit are integrated on the base and use the same FPCB board 8, which can effectively reduce costs and facilitate assembly. Compared with traditional As for the assembly method, this embodiment does not require alignment of the prism and the lens. When the two are installed on the base plate, the alignment process is completed automatically.

The prism motor uses a 3-degree-of-freedom rotating support mechanism with a single support point to adjust the angle of the prism. It has a simple structure and can achieve anti-shake.

The periscope lens driving device can be applied to a camera device equipped with a micro camera for image anti-shake. It can also be applied to various mobile devices with camera functions.

The above examples are only used to illustrate the present invention. In addition, there are many different implementations, and these implementations can be thought of by those skilled in the art after understanding the idea of the present invention. Therefore, they will not be explained here. List one.

Claims

A periscope lens driving device, characterized in that it includes a prism, a lens carrier for fixing the lens, an integrated base, and a driving unit for the prism and the lens carrier; both the prism and the lens carrier are arranged on the integrated base, The lens carrier is slidingly connected to the integrated base, and no elastic connector is provided between the lens carrier and the integrated base; the prism is fixed on the prism frame, and the integrated base supports the lens carrier through a single fulcrum 3-degree-of-freedom rotation support mechanism. Prism holder.
The periscope lens driving device according to claim 1, wherein the 3-degree-of-freedom rotation support mechanism is composed of a prism frame ball seat and a prism frame ball that are respectively located at the bottom of the inner cavity of the integrated base and the bottom of the prism frame. .
The periscope lens driving device according to claim 1, wherein the integrated base and the prism frame are provided with drives that respectively drive the prism frame to rotate around the X-axis, the Y-axis or the X-axis and the Z-axis. unit.
The periscope lens driving device according to claim 3, wherein the driving unit includes a driving coil, a magnet and a Hall device for detecting the position of the magnet; the magnetically permeable sheet and the magnet are fixed on the moving member , the driving coil is fixed on the stationary part.
The periscope lens driving device according to claim 4, wherein the driving unit further includes a magnetically permeable sheet, and the magnetically permeable sheet is disposed on a side of the magnet away from the driving coil.
A camera device, characterized by comprising the periscope lens driving device according to any one of claims 1 to 5.
A mobile device, characterized by comprising the periscope lens driving device according to any one of claims 1 to 5.