CN217639710U

CN217639710U - Periscopic lens driving device, camera device and mobile device

Info

Publication number: CN217639710U
Application number: CN202221330115.3U
Authority: CN
Inventors: 龚高峰; 王建华; 凌彩盛
Original assignee: Shanghai BL Electronics Co Ltd
Current assignee: Shanghai BL Electronics Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-21
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses a periscopic lens driving device, a camera device and a mobile device, wherein the periscopic lens driving device comprises a prism, a lens carrier for fixing the lens, an integrated base and a driving unit for the prism and the lens carrier; the prism and the lens carrier are both arranged on the integrated base; the prism is fixed on the prism frame, and the integrated base supports the prism frame through the 3-degree-of-freedom rotary supporting mechanism. The periscopic lens driving device of the utility model is characterized in that the prism and the lens carrier are both arranged on the integrated base; the assembly of the reflection module and the lens module is avoided; the difficulty in assembling and debugging the two groups of motors is reduced; the prism is fixed on the prism frame, and the integrated base supports the prism frame through the 3-degree-of-freedom rotary supporting mechanism; the structure is simple, and meanwhile, the driving resistance and the power consumption are reduced.

Description

Periscopic lens driving device, camera device and mobile equipment

Technical Field

The utility model relates to the field of anti-shake motors, in particular to a periscopic lens driving device; and an image pickup apparatus and a mobile terminal equipped with the periscopic lens driving apparatus.

Background

With the development of technology, many electronic devices (e.g., tablet computers or smart phones) are equipped with a lens module and have camera or video functions today. The lens can be roughly divided into a wide-angle lens with short focal length and a telescopic lens with long focal length; however, placing a long-focus lens in the optical module increases the thickness of the electronic device, and it is difficult to meet the requirement of the mobile terminal device for light weight and thin profile. In the prior art, a periscopic design is usually adopted, i.e. the optical path is laid down and a turning mirror is added to turn the optical path by 90 degrees, so that the whole optical system is laid down to reduce the overall height.

The existing periscopic lens driving device comprises a reflection module (a prism motor) and a lens module (a zoom motor), wherein the reflection module reflects imaging light rays for 90 degrees and then emits the imaging light rays into the lens module, and the lens module is used for focusing and imaging. At present, the anti-shake scheme of the periscopic module is that the reflection module and the lens module are respectively or jointly responsible for anti-shake in two directions, so that lens focusing and anti-shake need the reflection module and the lens module to be matched and driven to complete, and the problems that two groups of motors are large in assembly and debugging difficulty, the number of driving devices is large, the design is complex, the structure size is large, and the reliability is not high exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a periscopic lens driving device which has novel and unique structure and convenient use and can reduce the difficulty of assembly and debugging; the specific technical scheme is as follows:

a periscopic lens driving device comprises a prism, a lens carrier for fixing a lens, an integrated base and a driving unit of the prism and the lens carrier; the prism and the lens carrier are both arranged on the integrated base; the prism is fixed on the prism frame, and the integrated base supports the prism frame through the 3-degree-of-freedom rotary supporting mechanism.

Furthermore, the lens carrier is connected with the integrated base in a sliding mode, and an elastic connecting piece is not arranged between the lens carrier and the integrated base.

Further, the 3-degree-of-freedom rotation supporting mechanism is composed of a prism frame ball seat and a prism frame ball, wherein the prism frame ball seat and the prism frame ball are respectively arranged 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 which respectively drive the prism frame to rotate around an X axis and a Y axis or an X axis and a Z axis.

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

Further, the drive unit further comprises a magnetic conductive sheet, and the magnetic conductive sheet is arranged on the side face, far away from the drive coil, of the magnet.

The utility model also discloses a camera device is equipped with foretell periscopic lens drive arrangement.

The utility model also discloses a mobile device is equipped with foretell periscopic lens drive arrangement.

The periscopic lens driving device of the utility model is characterized in that the prism and the lens carrier are both arranged on the integrated base; the alignment procedure in the assembly process is reduced, the assembly is convenient, the yield is improved, and meanwhile, the production cost and the device size can be effectively reduced, so that the purposes of saving the cost and miniaturizing are achieved; 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 and Z axis) rotary supporting mechanism; the structure is simple, and meanwhile, the driving resistance and the power consumption are reduced.

Drawings

Fig. 1 is a schematic structural view of the periscopic lens driving device of the present invention;

FIG. 2 is a first schematic view of a prism motor structure;

FIG. 3 is an exploded view of the structure of FIG. 1;

FIG. 4 is a schematic bottom view of the prism motor;

FIG. 5 is a schematic view of a prism motor structure II;

FIG. 6 is a first schematic view of a zoom motor;

FIG. 7 is a second schematic view of a zoom motor;

FIG. 8 is a third schematic view of a zoom motor;

fig. 9 is a schematic view of a lens carrier structure.

In the figure: 1. a housing; 2. a support; 3. a lens; 4. a prism; 5. a lens carrier; 501. a lens carrier ball groove; 502. an anti-collision boss; 503. a guide groove; 51. a lens driving unit; 511. a lens driving magnetic conductive sheet; 512. a lens driving magnet; 513. a lens driving coil; 514. the lens drives the Hall chip; 52. a lens sliding ball; 53. a lens magnetic attraction plate; 6. a prism frame; 601. limiting the prism frame in front; 602. limiting the prism frame; 61. a prism first drive unit; 611. A prism first drive magnetic conductive sheet; 612. a prism first drive magnet; 613. a prism first drive coil; 62. A prism second driving unit; 621. the prism second driving magnetic conductive sheet; 622. a prism second drive magnet; 623. a prism second drive coil; 624. the prism second drive Hall chip; 63. prism frame ball; 64. a prism support ball; 7. an integral base; 71. a tailgate; 711. a guide plate; 72. a front baffle; 73. a ball sliding groove; 74. a prism support ball seat; 75. a prism frame ball seat; 8. FPCB board.

Detailed Description

The present invention will be more fully described with reference to the following examples. The present 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 description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as 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" can encompass both an orientation of upper and lower. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 and 3, the periscopic lens driving device in the present embodiment mainly includes a housing 1, a mount 2, a prism 4, a lens carrier 5, an integrated base, a driving unit for driving the prism 4, and a driving unit for driving the lens carrier 5; and FPC. The prism 4 is used for changing the direction of the light beam passing through the lens 3 through reflection, and projecting the light beam to the image sensor through the lens 3; the lens 3 is fixed on a 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 the FPCB plate 8; the alignment procedure in the assembling process is reduced, the assembling is convenient, the yield is improved, meanwhile, the production cost and the device size can be effectively reduced, and the purposes of saving the cost and realizing miniaturization are achieved.

The lens carrier 5 is connected with the integrated base 7 in a sliding mode, and elastic connecting pieces such as springs and the like are not arranged between the lens carrier 5 and the integrated base 7; low power consumption, few parts, simplified structure, and easy assembly and miniaturization.

As shown in fig. 6 to 9, the integrated base 7 is provided with a ball slide groove 73; at least one ball sliding groove 73 is formed on each of the left and right sides of the integrated base 7. The bottom of the lens carrier 5 is provided with at least 3 lens carrier ball grooves 501 for receiving the lens sliding balls 52; the lens slide balls 52 are respectively disposed in the ball slide grooves 73 on both sides. The 3 lens sliding balls 52 are used to form a support plane to avoid up-and-down shaking, so that the lens carrier 5 can slide smoothly in the horizontal direction.

The slide block can also be adopted to support the lens carrier 5, or one or two surfaces of the contact surface of the lens carrier 5 and the integrated base 7 are/is adopted to adopt a material with low friction coefficient to reduce the friction force between the lens carrier 5 and the integrated base 7; such as adhered polytetrafluoroethylene sheets.

A lens magnetism attracting plate 53 is arranged at the bottom of the integrated base 7, and pressure is generated on the lens sliding balls 52 through the attraction force generated between the lens magnetism attracting plate 53 and the lens driving magnet 512, so that the lens sliding balls 52 are prevented from being separated from the ball sliding grooves 73; the lens carrier 5 can be made to slide more smoothly. The adsorption force is set to be 5-10 times of the mass of the mover carried by the lens carrier.

The lens carrier 5 is moved in the Z-axis direction by the lens driving unit 51, changing 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; a lens driving hall chip 514 is fixed on the FPCB board 8 for feeding back the position of the lens carrier 5 by detecting a change in the magnetic field caused by the movement of the lens driving magnet 512; the control circuit adjusts the current of the lens driving coil 513 according to the feedback signal of the lens driving hall chip 514, and drives the lens driving magnet 512 to move to a specified position.

A lens driving magnetic conducting sheet 511 is further arranged on one side of the lens driving magnet 512 far away from the lens driving coil 513, and the lens driving magnetic conducting sheet 511 is made of a magnetic material, so that the magnetic field intensity can be enhanced, and a larger thrust force can be formed.

Integrative base 7 is provided with preceding baffle 72 and backplate 71 and blocks the spacing at both ends around lens carrier 5 surpasss respectively, corresponds the side with preceding baffle 72 and backplate 71 on lens carrier 5 and is provided with crashproof boss 502, crashproof boss 502 can be for inlaying the flexible glue of locating lens carrier 5, if with TPU material through moulding plastics integrated into one piece in lens carrier 5.

The integrated base 7 is provided with a guide plate 711 extending along the Z-axis direction on the rear baffle 71, a guide groove 503 is arranged at the corresponding position of the lens carrier 5, the guide plate 711 is in clearance fit with the guide groove 503, and when the lens carrier 5 is impacted by external force, the lens carrier 5 can be limited and protected.

As shown in fig. 4 and 5, the prism 4 is fixed to the prism frame 6, and the integral base 7 supports the prism frame 6 by a 3-degree-of-freedom rotation support mechanism. The 3-degree-of-freedom rotary supporting mechanism can enable the prism frame 6 to rotate more flexibly and the rotation resistance to be smaller. Of course, the 3-degree-of-freedom rotation support mechanism can also be realized in various ways; for example: the bottom of the prism frame 6 is provided with a hemispherical bulge or a conical bulge. In this embodiment, the prism frame ball seat 75 is arranged at the bottom of the inner cavity of the integrated base 7; the prism frame ball seat 75 is also arranged at the bottom of the prism frame 6; the prism frame ball 63 is matched with the prism frame ball seats 75 above and below to form a rotational support mechanism with 3 degrees of freedom in X, Y and Z axes; during maintenance, only the prism frame ball 63 needs to be replaced; the maintenance is simpler and more convenient.

The integrated base 7 and the prism frame 6 are provided with driving units which respectively drive the prism frame 6 to rotate around an X axis and a Z axis: a prism first drive unit 61 and a prism second drive unit 62; the driving part of the prism second driving unit 62 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 about 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 about the Z-axis. Rotating the prism first drive magnet 612 by 90 degrees; the prism first driving coil 613 of the driving part drives the prism first driving magnet 612 to rotate about the Y-axis. The prism first driving unit 61 is also provided with a prism first driving hall chip and a prism first driving magnetic conducting 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 magnetic conducting plate 621.

In fig. 2, two sets of prism second driving units 62 are arranged at the bottom of the inner cavity of the integrated base 7; a set of prism second drive units 62 may also be used to drive the prism second drive magnets 622 in rotation about the X-axis.

It is also possible to adjust the positions of the prism first drive unit 61 and the prism second drive unit 62, to dispose the prism second drive unit 62 at the side wall and the prism first drive unit 61 at the bottom.

The prism first driving unit 61 and the prism second driving unit 62 drive the prism frame 6 to rotate around the X axis and the Z axis by taking the prism frame ball 63 as the center; or rotation about the X-axis and rotation about the Y-axis may both achieve anti-shake of the image.

Enough gaps are reserved between the prism frame 6 and the front wall, the rear wall, the left wall, the right wall, the bottom wall and the inner wall of the support 2 of the inner cavity of the integrated base 7, and the prism frame 6 can rotate in 3 degrees of freedom by taking the prism frame balls 63 as centers. A front limit 601 extending horizontally from the prism frame can be arranged at the front part of the prism; a prism frame rear limit 602 extending horizontally is arranged at the rear part; the two extending limiting structures limit the 3-degree-of-freedom rotation of the prism frame 6; the support 2 vertically limits the prism frame 6, and prevents the prism frame balls 63 from separating from the prism frame ball seat 75.

Two prism support ball seats 74 are arranged at the bottom side of the rear end of the prism frame 6 and used for placing the prism support balls 64; the integrated base 7 is correspondingly provided with two prism support ball seats 74, when the power is not on, in an upright state, because the gravity center is close to the back, 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 ball 64 should be larger than 3 times of the pitching range of the prism frame 6, and when the device is in the non-upright posture, the prism support ball 64 is matched with the prism support ball seat 74, so that the change range of the prism frame 6 can be limited.

The periscopic lens driving device in the embodiment cancels a complex spring structure of the existing focusing anti-shake driving device, adopts balls to directly replace the existing focusing anti-shake driving device, can realize the support of a carrier, and can drive the carrier to perform focusing anti-shake movement at the same time, so that the periscopic lens driving device is simple in structure, reduces driving resistance and reduces power consumption; the ball replaces the front spring and the rear spring, so that the driving resistance is small, the power consumption is low, the number of parts is small, the structure is simplified, and the assembly and the miniaturization are facilitated.

Prism motor and the same base of zoom motor sharing and FPCB board 8 have reduced the counterpoint process in the equipment process, and the equipment is convenient, and the yield improves, simultaneously, can effectively reduce manufacturing cost and device size, reaches cost-effective and miniaturized purpose.

The prism motor and the zoom motor are respectively sensed by the Hall chip, closed-loop control is realized, and the purposes of high-precision focusing and anti-shake driving are achieved.

Integrate first drive unit (drive coil, hall chip) and second drive unit on the base to same piece FPCB board 8 of practicality, thereby when can effectively reduce cost, also made things convenient for the equipment, compare in traditional equipment mode, this embodiment need not carry out the counterpoint of prism and camera lens, when installing the two on the bottom plate, has accomplished the counterpoint process promptly by oneself.

The prism motor adopts a single-supporting-point 3-freedom-degree rotary supporting mechanism to realize the angle adjustment of the prism, has a simple structure, and can realize anti-shake.

The periscopic lens driving device can be applied to a camera device provided with a miniature camera and used for image anti-shake. But also to various mobile devices having a camera function.

The above examples are only for illustrating the present invention, and besides, there are many different embodiments, which can be conceived by those skilled in the art after understanding the idea of the present invention, and therefore, they are not listed here.

Claims

1. A periscopic lens driving device is characterized by comprising a prism, a lens carrier for fixing a lens, an integrated base and a driving unit for the prism and the lens carrier; the prism and the lens carrier are both arranged on the integrated base; the prism is fixed on the prism frame, and the integrated base supports the prism frame through a single-fulcrum 3-degree-of-freedom rotary supporting mechanism.

2. A periscopic lens driving apparatus according to claim 1, wherein said 3-degree-of-freedom rotation supporting mechanism is composed of a prism frame ball seat and a prism frame ball, which are respectively provided at the bottom of the integrated base cavity and at the bottom of said prism frame.

3. A periscopic lens driving apparatus according to claim 1, wherein the integrated base and the prism frame are provided with driving units for driving the prism frame to rotate around X-axis, Y-axis or X-axis, Z-axis, respectively.

4. A periscopic lens driving apparatus according to claim 3, wherein said driving unit includes a driving coil, a magnet, and a hall device which detects a position of said magnet; the magnet is fixed on the movable piece, and the driving coil is fixed on the static piece.

5. A periscopic lens driving apparatus according to claim 4, wherein the driving unit further comprises a magnetic conductive plate disposed on a side of the magnet remote from the driving coil.

6. An image pickup apparatus comprising the periscopic lens driving apparatus according to any one of claims 1 to 5.

7. A mobile device characterized by comprising the periscopic lens driving apparatus according to any one of claims 1 to 5.