CN111478549A

CN111478549A - Voice coil motor for camera module

Info

Publication number: CN111478549A
Application number: CN202010435106.XA
Authority: CN
Inventors: 刘雨; 邵柏芝
Original assignee: Jiangsu Xinxinxing Technology Co ltd
Current assignee: Jiangsu Xinxinxing Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-07-31

Abstract

The invention discloses a voice coil motor for a camera module, which comprises: an outer chassis assembly, an inner chassis assembly, a moving plate and a carrier assembly; outer base subassembly includes outer base, and the soft board subassembly of fixing on outer base includes: the flexible circuit board is provided with a first coil, a second coil and a third coil; the inner base assembly comprises an inner base and a first magnet arranged on the outer side wall of the inner base; the first magnet and the first coil are arranged oppositely in parallel, and the first magnet and the first coil act to enable the inner base to slide along the first slideway structure; the carrier assembly comprises a carrier for mounting the camera module, and a second magnet and a third magnet which are arranged on the outer side wall of the carrier; the second magnet and the second coil are arranged in parallel and opposite, and the third magnet and the third coil are arranged in parallel and opposite; the second magnet and the second coil act to enable the moving plate and the carrier assembly to slide along the second slideway structure, and the third magnet and the third coil act to enable the carrier assembly to slide along the third slideway structure.

Description

Voice coil motor for camera module

Technical Field

The invention relates to the technical field of camera driving, in particular to a voice coil motor for a camera module.

Background

The optics anti-shake performance of electronic equipment module of making a video recording more and more receives people's attention, and optics anti-shake voice coil motor is an optics anti-shake device, and the module of making a video recording generally sets up on optics anti-shake voice coil motor, and optics anti-shake voice coil motor can effectually reduce the probability that the dim photo was discharged under the low light environment to and reduce the shake that film or photo shooting in-process are difficult to avoid.

The design idea of the existing optical anti-shake voice coil motor is that the anti-shake voice coil motor in the voice coil motor is complex in design structure, low in production capacity and productivity, high in manufacturing cost, and a certain part plays a role of multi-direction anti-shake, so that the anti-shake controllability is poor in essence, and the quality of pictures or films can be poor under the condition that a subject to be shot slightly shakes.

Disclosure of Invention

The invention aims to provide a voice coil motor for a camera module, which can realize respective controllable movement in three axial directions, and the controllable movement can be used for compensating the shaking of an object to be shot so as to realize quick, accurate and stable focusing.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a voice coil motor for a camera module, comprising: an outer chassis assembly, an inner chassis assembly, a moving plate and a carrier assembly;

the outer base assembly comprises an outer base, and a soft plate assembly fixed on the outer base; the flexible board assembly includes: the flexible circuit board is sequentially provided with a first coil, a second coil and a third coil;

the inner base assembly comprises an inner base and a first magnet arranged on the outer side wall of the inner base; the inner base assembly is installed in an inner cavity of the outer base assembly, the first magnet and the first coil are oppositely arranged in parallel, a side wall where the first magnet is arranged and an inner side wall of the outer base where the first coil is located are provided with first slideway structures which are matched with each other, the first slideway structures are parallel to an axis of the outer base, and the first magnet and the first coil act to enable the inner base to slide along the first slideway structures;

the carrier assembly comprises a carrier for mounting a camera module, and a second magnet and a third magnet which are arranged on the outer side wall of the carrier;

the moving plate and the carrier assembly are sequentially arranged in an inner cavity of the inner base, so that the second magnet and the second coil are oppositely arranged in parallel, and the third magnet and the third coil are oppositely arranged in parallel; the movable plate with set up the second slide structure of mutually supporting between the interior base, the movable plate with set up the third slide structure of mutually supporting between the carrier, the second magnet with the second coil effect makes the movable plate with the carrier subassembly is followed the second slide structure slides, the third magnet with the third coil effect makes the carrier subassembly is followed the third slide structure slides, perhaps, the second magnet with the second coil effect makes the carrier subassembly is followed the third slide structure slides, the third magnet with the third coil effect makes the movable plate with the carrier subassembly is followed the second slide structure slides.

Furthermore, the sliding directions provided by the first slideway structure, the second slideway structure and the third slideway structure are pairwise perpendicular.

Furthermore, the first magnet comprises two magnets which are arranged along the axial direction of the inner base and have opposite radial magnetizing directions, and the second magnet and the third magnet are both magnets which are magnetized along the radial direction.

Furthermore, the outer base assembly further comprises two magnetic conduction plates, one magnetic conduction plate and the first magnet are correspondingly arranged inside the outer base, and the other magnetic conduction plate is fixed on the flexible circuit board on the back face of the first coil.

Further, the flexible board assembly further comprises a first chip, a second chip and a third chip arranged on the flexible board, wherein the first chip, the second chip and the third chip are respectively used for controlling the current in the first coil, the second coil and the third coil.

Further, the first chip, the second chip and the third chip are respectively disposed at the center positions of the first coil, the second coil and the third coil, and the first chip, the second chip and the third chip are further configured to respectively detect a magnetic field signal, send the detected magnetic field signal to a control element of the voice coil motor, and receive a control current signal sent by the control element.

Further, the first runner structure includes: the first accommodating groove and the second accommodating groove are formed in the inner base, the first ball is mounted in the first accommodating groove and the second accommodating groove, the first ball and the second ball are arranged on the first sliding groove and the second sliding groove in the inner side wall of the outer base in a corresponding mode respectively to the first accommodating groove and the second accommodating groove, and the first ball can slide along the first sliding groove and the second sliding groove.

Furthermore, the second accommodating groove accommodates two first balls, the two first balls are arranged in parallel along a direction perpendicular to the sliding direction, a first protrusion for separating the two first balls is arranged in the second accommodating groove, and the first balls close to the end part of the inner base slide in the second sliding groove; the contact surface of the first protrusion and the first ball is an inclined surface adapted to the installation of the first ball, the height of the first protrusion is smaller than the depth of the second accommodating groove, the part of the first groove wall corresponding to the second sliding groove and the first protrusion extends into the second accommodating groove, and the contact surface of the first groove wall side wall and the first ball is an inclined surface adapted to the installation of the first ball.

Further, the second runner structure includes: the third accommodating groove and the fourth accommodating groove are arranged on the bottom surface of the inner base, the second ball arranged in the third accommodating groove and the fourth accommodating groove is arranged on the third sliding groove and the fourth sliding groove on the end surface of the movable plate correspondingly to the third accommodating groove and the fourth accommodating groove respectively, and the second ball can slide along the third sliding groove and the fourth sliding groove.

Furthermore, the fourth accommodating groove accommodates two second balls, the two second balls are arranged in parallel along a direction perpendicular to the sliding direction, a second protrusion for separating the two second balls is arranged in the fourth accommodating groove, the contact surface of the second protrusion and the two second balls is an inclined surface adapted to the installation of the second balls, the height of the second protrusion is smaller than the groove depth of the fourth accommodating groove, the middle part of the fourth sliding groove is provided with a second groove wall corresponding to the second protrusion, the second groove wall part extends into the fourth accommodating groove, and the contact surface of the second groove wall and the two second balls is an inclined surface adapted to the installation of the second balls.

Further, the third ramp structure includes: the third ball bearing is arranged in the fifth accommodating groove and the sixth accommodating groove, is arranged on the bottom surface of the carrier and corresponds to the fifth accommodating groove and the sixth accommodating groove respectively, and slides along the fifth sliding groove and the sixth sliding groove.

Furthermore, the sixth accommodating groove accommodates two third balls, the two third balls are arranged in parallel along a direction perpendicular to the sliding direction, a third protrusion for separating the two third balls is arranged in the sixth accommodating groove, the contact surface between the third protrusion and the two third balls is an inclined surface adapted to the installation of the third balls, the height of the third protrusion is smaller than the groove depth of the third accommodating groove, the middle part of the sixth sliding groove is provided with a third groove wall corresponding to the third protrusion, the third groove wall extends into the sixth accommodating groove, and the contact surface between the third groove wall and the two third balls is an inclined surface adapted to the installation of the third balls.

Further, the voice coil motor further comprises an upper cover, the upper cover is fixed on the inner base, and the moving plate and the carrier assembly are fixed in the cavity of the inner base.

Further, the voice coil motor further comprises a shell, the shell covers the upper cover, the carrier assembly, the moving plate and the outer base assembly in the inner cavity of the shell in a buckling mode, and the shell is provided with a notch facilitating arrangement of a power supply line of the soft plate assembly.

According to the voice coil motor for the camera module, the carrier assembly is mounted to move along the axis direction of the voice coil motor through the action of the first coil and the first magnet and the matching of the first coil and the first slide way structure, the carrier assembly is mounted to move along two directions vertical to the axis direction of the voice coil motor through the action of the second coil and the second magnet and the matching of the second slide way structure and the action of the third coil and the third magnet and the matching of the third slide way structure, the camera module is adjusted along the three-axis direction after the camera module is mounted on the carrier assembly, meanwhile, the adjusting mechanisms in each direction can be independently adjusted in the corresponding direction of the camera module, the adjusting mechanisms in each direction are not mutually influenced, so that the shaking of an object to be shot is compensated, and the fast, accurate and stable focusing is realized.

Drawings

Fig. 1 is a schematic structural diagram of a voice coil motor for a camera module according to an example of the present invention;

fig. 2 is a schematic structural diagram of a voice coil motor for a camera module according to an example of the present invention;

FIG. 3 is a schematic view of the structure 31 of FIG. 2;

FIG. 4 is another schematic view of the attitude structure of FIG. 3;

FIG. 5 is a schematic view of the assembled structures of FIGS. 2, 4, 5, 6, 7, 8 and 9;

FIG. 6 is another schematic view of the attitude structure of FIG. 5;

FIG. 7 is a schematic view of the

assembled structures

31, 41, 42 and 7 of FIG. 2;

FIG. 8 is a schematic view of the cross-sectional structure A-A of FIG. 7;

FIG. 9 is a schematic view of FIGS. 2, taken together with FIGS. 8 and 41;

FIG. 10 is a schematic view of FIG. 2, showing structure 5;

FIG. 11 is a schematic view of the assembled structures of 5, 8 and 41 in FIG. 2;

FIG. 12 is a schematic cross-sectional view taken along line B-B in FIG. 11;

FIG. 13 is a schematic cross-sectional view of C-C of FIG. 11;

FIG. 14 is a schematic view of FIGS. 2, taken after assembly of FIGS. 9 and 5;

FIG. 15 is a schematic view of structure 61 of FIG. 2;

FIG. 16 is a schematic view of the

assembled structures

61, 9 and 5 of FIG. 2;

FIG. 17 is a schematic cross-sectional view taken along line D-D in FIG. 2;

FIG. 18 is a schematic view of the action of the soft plate assembly 32 with the first magnet 42, the second magnet 62 and the third magnet 63;

FIG. 19 is a schematic view of the structure 32 of FIG. 2;

FIG. 20 is a schematic cross-sectional view taken along line E-E in FIG. 19;

fig. 21 is a schematic view showing relative positional relationships of the carrier 61, the first magnet 42, the second magnet 62, and the third magnet 63;

in the figure:

1. a housing; 2. an upper cover; 31. an outer base; 311. a first chute; 312. a second chute; 313. a first slot wall; 32. a flexible board assembly; 321. a first coil; 322 a second coil; 323. a third coil; 324. a first chip; 325. a second chip; 326. a third chip; 327. a flexible circuit board; 33. a magnetic conductive plate; 34. a magnetic conductive plate; 4. an inner base assembly; 41. an inner base; 42. a first magnet; 421. a magnet; 422. a magnet; 43. a first protrusion; 44. a second protrusion; 5. moving the plate; 51. a third chute; 52. a fourth chute; 53. a third protrusion; 54. a second slot wall; 6. a carrier assembly; 61. a carrier; 62. a second magnet; 63. a third magnet; 64. a fifth chute; 65. a sixth chute; 66. a third tank wall; 7. a first ball bearing; 8. a second ball bearing; 9. and a third ball.

Detailed Description

To clearly illustrate the idea of the present invention, the present invention is described below with reference to examples.

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is described clearly and completely below with reference to the drawings in the examples of the present invention, and it is obvious that the described examples are only a part of examples of the present invention, and not all examples. All other embodiments obtained by a person skilled in the art based on the examples of the present invention without any inventive step shall fall within the scope of protection of the present invention.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used solely to distinguish similar items from one another and are not to be construed as requiring a particular order or sequence, as such uses are to be interchangeable under appropriate circumstances.

This example provides a voice coil motor for module of making a video recording, includes: an outer chassis assembly, an inner chassis assembly, a moving plate and a carrier assembly;

the outer base assembly comprises an outer base and a soft plate assembly fixed on the outer base; the flexible board assembly includes: the flexible circuit board is sequentially provided with a first coil, a second coil and a third coil; the end faces of the first coil and the third coil are parallel and opposite, the second coil is perpendicular to the end faces of the first coil and the third coil, and the first coil, the second coil and the third coil can generate a magnetic field in the inner cavity of the outer base;

the inner base assembly comprises an inner base and a first magnet arranged on the outer side wall of the inner base; the inner base assembly is arranged in an inner cavity of the outer base assembly, the first magnet and the first coil are arranged in parallel and opposite to each other, a first slideway structure which is matched with each other is arranged on the side wall where the first magnet is arranged and the inner side wall of the outer base where the first coil is arranged, the first slideway structure is parallel to the axis of the outer base, and the first magnet and the coil act to enable the inner base to slide along the first slideway structure;

the carrier assembly comprises a carrier for mounting the camera module, and a second magnet and a third magnet which are arranged on the outer side wall of the carrier;

the moving plate and the carrier assembly are sequentially arranged in an inner cavity of the inner base, so that the second magnet and the second coil are arranged in parallel and oppositely, and the third magnet and the third coil are arranged in parallel and oppositely; the second slide structure matched with each other is arranged between the movable plate and the inner base, the third slide structure matched with each other is arranged between the movable plate and the carrier assembly, the second magnet and the second coil act to enable the movable plate and the carrier assembly to slide along the second slide structure, the third magnet and the third coil act to enable the carrier assembly to slide along the third slide structure, or the second magnet and the second coil act to enable the carrier assembly to slide along the third slide structure, and the third magnet and the third coil act to enable the movable plate and the carrier assembly to slide along the second slide structure.

The voice coil motor for the camera module realizes that the carrier assembly is installed to move along the axis direction through the action of the first coil and the first magnet and the matching with the first slide way structure, realizes that the carrier assembly moves along two directions vertical to the axis through the action of the second coil and the second magnet and the matching of the second slide way structure and the action of the third coil and the third magnet and the matching of the third slide way structure, realizes the adjustment of the camera lens along the three-axis direction after the camera lens is installed on the carrier assembly, simultaneously realizes the independent adjustment of the camera lens in the corresponding direction in each direction, and the adjustment mechanisms in each direction do not influence each other, thereby compensating the shaking of an object to be shot and realizing the quick, accurate and stable focusing.

In order to more clearly explain the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-21, there is provided an embodiment of a voice coil motor for a camera module, the voice coil motor comprising: an outer chassis assembly, an inner chassis assembly 4, a moving plate 5 and a carrier assembly 6;

as shown in fig. 2 to 4, the outer chassis assembly includes an outer chassis 31, a soft plate assembly 32 fixed to the outer chassis 31; as shown in fig. 18-20, the soft board assembly 32 includes: a flexible circuit board 327, a first coil 321, a second coil 322, and a third coil 323 sequentially disposed on the flexible circuit board 327; the end faces of the first coil 321 and the third coil 323 are arranged in parallel and opposite, the second coil 322 is perpendicular to the end faces of the first coil 321 and the third coil 323, and the first coil 321, the second coil 322 and the third coil 323 are all capable of generating a magnetic field in the inner cavity of the outer base 31. in this example, when the soft board assembly 32 is fixed on the outer base 31, the flexible circuit board 327 is fixed on the outer side wall of the outer base 31, and the first coil 321, the second coil 322 and the third coil 323 respectively pass through holes formed in three side walls of the outer base 31, so that the magnetic field can be generated in the inner cavity of the outer base 31.

As shown in fig. 5 to 6, the inner base assembly 4 comprises an inner base 41 and a first magnet 42 mounted on the outer side wall of the inner base 41, wherein the first magnet 42 comprises two magnets 421 and 422 arranged along the axial direction of the inner base and having opposite magnetizing directions in the radial direction; the inner base assembly 4 is installed in an inner cavity of the outer base assembly, the first magnet 42 and the first coil 321 are arranged in parallel and opposite to each other, a first slideway structure which is matched with each other is arranged on the side wall where the first magnet 42 and the inner side wall of the outer base 31 where the first coil 321 are located, the first slideway structure is parallel to the axis of the outer base 31, the first magnet 42 and the first coil 321 act to enable the inner base 41 to slide along the first slideway structure, specifically, after current is introduced into the first coil 321, the first magnet acts with the magnet 421 and the magnet 422 respectively, when the current is introduced into the first coil 321, a magnetic field generated by the current acts on the thrust generated by the upper magnet 421 to generate a thrust action on the lower magnet 422, and the inner base assembly 4 moves downwards relative to the outer base 31; when the first coil 321 is energized with an opposite current, the generated magnetic field generates an opposite thrust action on the upper magnet 421 and an opposite thrust action on the lower magnet 422, and the inner base assembly 4 moves upward relative to the outer base 31;

as shown in fig. 21, the carrier assembly 6 includes a carrier 61 for mounting a camera lens, and a second magnet 62 and a third magnet 63 disposed on outer side walls of the carrier, wherein a through hole provided in a central portion of the carrier 61 is for mounting the camera lens.

As shown in fig. 18, the moving plate 5 and the carrier assembly 6 are sequentially mounted in the inner cavity of the inner base 41 such that the second magnet 62 is disposed in parallel opposition to the second coil 322 and the third magnet 63 is disposed in parallel opposition to the third coil 323; a second slideway structure matched with each other is arranged between the moving plate 5 and the inner base 41, a third slideway structure matched with each other is arranged between the moving plate 5 and the carrier 61, the second magnet 62 and the second coil 322 act to enable the carrier assembly 6 to slide along the third slideway structure, the third magnet 63 and the third coil 323 act to enable the moving plate 5 and the carrier assembly 6 to slide along the second slideway structure, specifically, the second magnet 62 and the third magnet 63 are both magnets magnetized along the radial direction, and magnetic fields generated after currents in different directions are introduced into the second coil 322 and the third coil 323 respectively generate attraction or repulsion with the second magnet 62 and the third magnet 63, so that the moving plate 5 and the carrier assembly 6 slide along the second slideway structure, and the moving plate 6 slides along the third slideway structure.

In another embodiment, the second magnet 62 may act on the second coil 322 to slide the moving plate 5 and the carrier assembly 6 along the second slide structure, and the third magnet 63 may act on the third coil 323 to slide the carrier assembly 6 along the third slide structure.

In this example, the sliding directions provided by the first slide way structure, the second slide way structure and the third slide way structure are two-by-two perpendicular, so that the camera module can move up and down, back and forth and left and right.

As shown in fig. 20, the flexible board assembly 32 further includes a first chip 324, a second chip 325, and a third chip 326 disposed on the flexible board, and the first chip 324, the second chip 325, and the third chip 326 are used to control the current in the first coil 323, the second coil 324, and the third coil 325, respectively. Preferably, the first chip 324, the second chip 325 and the third chip 326 are respectively disposed at the center positions of the first coil 321, the second coil 322 and the third coil 323, the first chip 324, the second chip 325 and the third chip 326 are further configured to respectively detect a magnetic field signal, send the detected magnetic field signal to a control element of the voice coil motor, and receive a control current signal sent by the control element, specifically, the first chip 324, the second chip 325 and the third chip 326 can send magnetic induction intensity signals respectively detected by the chips to a control element of other mobile devices such as a mobile phone, the control element obtains the position of the camera lens through calculation, and when the position of the camera lens needs to be changed according to the shooting requirement of the mobile device, the control element sends control signals to the first chip 324, the second chip 325 and the third chip 326 through calculation to respectively control the first coil 323, the second coil 325 and the third coil 326, The direction and magnitude of the current in the second coil 324 and the third coil 325 are controlled by the first chip 324, the second chip 325 and the third chip 326, respectively, so as to control the first coil 323, the second coil 324 and the third coil 325 to act with the first magnet 42, the second magnet 62 and the third magnet 63, respectively.

As shown in fig. 3-8, the first ramp structure includes: the first receiving groove and the second receiving groove disposed at both ends of the first magnet 42 on the inner base 41, the first ball 7 mounted in the first receiving groove and the second receiving groove, and the first sliding groove 311 and the second sliding groove 312 disposed on the inner side wall of the outer base 31 corresponding to the first receiving groove and the second receiving groove, respectively, the first ball 7 can slide along the first sliding groove 311 and the second sliding groove 312. Preferably, the second receiving groove receives two first balls 7, the two first balls 7 are arranged in parallel along a direction perpendicular to the sliding direction, the second receiving groove is provided with a first protrusion 43 for separating the two first balls, and the first balls 7 close to the end of the inner base slide in the second sliding groove 312; the contact surface of the first protrusion 43 and the first ball 7 is an inclined surface adapted to the installation of the first ball 7, the height of the first protrusion 43 is smaller than the depth of the second receiving groove, the side wall portion of the second sliding groove 312 corresponding to the first protrusion extends into the second receiving groove, and the contact surface of the side wall and the first ball 7 is an inclined surface adapted to the installation of the first ball 7, specifically, in fig. 5, two upper and lower second receiving grooves are provided on the inner base 41 on the left side of the first magnet 42, two first balls 7 are horizontally received in each second receiving groove, the first protrusion 43 is provided between the two first balls 7, as shown in fig. 8, the side wall portion of the second sliding groove 312 corresponding to the first protrusion extends into the second receiving groove, and the contact surface of the side wall and the first ball 7 is an inclined surface adapted to the installation of the first ball 7, so as to limit the first ball 7 in the second receiving groove, the middle portion of the inner base 41 on the right side of the first magnet 42 is provided with a first receiving groove, the first accommodation groove accommodates a first ball 7 therein.

As shown in fig. 9-13, the second ramp structure includes: the third receiving groove and the fourth receiving groove disposed on the bottom surface of the inner base 41, the second ball 8 mounted in the third receiving groove and the fourth receiving groove, the third sliding groove 51 and the fourth sliding groove 52 disposed on an end surface of the moving plate 5 corresponding to the third receiving groove and the fourth receiving groove, respectively, and the second ball 8 can slide along the third sliding groove 51 and the fourth sliding groove 52. Preferably, two second balls 8 are accommodated in the fourth accommodating groove, the two second balls 8 are arranged in parallel along a direction perpendicular to the sliding direction, a second protrusion 44 for separating the two second balls 8 is arranged in the fourth accommodating groove, the contact surface between the second protrusion 44 and the two second balls 8 is an inclined surface adapted to the installation of the second balls 8, the height of the second protrusion 44 is smaller than the groove depth of the fourth accommodating groove, a second groove wall 54 corresponding to the second protrusion 44 is arranged in the middle of the fourth sliding groove 52, the second groove wall 54 partially extends into the fourth accommodating groove, and the contact surface between the second groove wall 54 and the two second balls 8 is an inclined surface adapted to the installation of the second balls 8. As shown in fig. 9, two fourth receiving grooves are disposed at the front end of the bottom surface of the inner base 41, two third receiving grooves are disposed at the rear end, each fourth receiving groove transversely receives two second balls 8, a second protrusion 44 is disposed between the two second balls 8, as shown in 12-13, the contact surface between the second protrusion 44 and the two second balls 8 is an inclined surface adapted to the installation of the second balls 8, the height of the second protrusion 44 is smaller than the depth of the fourth receiving groove, a second groove wall 54 corresponding to the second protrusion 44 is disposed on the fourth sliding groove 52, a portion of the second groove wall 54 extends into the fourth receiving groove, the contact surface between the second groove wall 54 and the two second balls 8 is an inclined surface adapted to the installation of the second balls 8, and one second ball 8 is received in each third receiving groove.

As shown in fig. 14-17, the third ramp structure includes: a fifth receiving groove and a sixth receiving groove provided on the other end surface of the moving plate 5, a third ball 9 mounted in the fifth receiving groove and the sixth receiving groove, a fifth sliding groove 64 and a sixth sliding groove 65 provided on the bottom surface of the carrier 61 corresponding to the fifth receiving groove and the sixth receiving groove, respectively, and the third ball 9 slides along the fifth sliding groove 64 and the sixth sliding groove 65. Preferably, two third balls 9 are accommodated in the sixth accommodating groove, the two third balls 9 are arranged in parallel along a direction perpendicular to the sliding direction, a third protrusion 53 for separating the two third balls 9 is arranged in the sixth accommodating groove, the contact surface between the third protrusion 53 and the two third balls 9 is an inclined surface adapted to the installation of the third balls 9, the height of the third protrusion 53 is smaller than the groove depth of the sixth accommodating groove, a third groove wall 66 corresponding to the third protrusion 53 is arranged in the middle of the sixth sliding groove 65, the groove wall part of the third groove wall 66 extends into the sixth accommodating groove, and the contact surface between the third groove wall 66 and the two third balls 9 is an inclined surface adapted to the installation of the third balls 9. As shown in fig. 14, two sixth receiving grooves are formed in the front end of the other end surface of the moving plate 5, two fifth receiving grooves are formed in the rear end, each sixth receiving groove is used for longitudinally receiving two third balls 9, a third protrusion 53 is formed between the two third balls 9, 16-17 shows that the contact surface between the third protrusion 53 and the two third balls 9 is an inclined surface adapted to the installation of the third ball 9, the height of the third protrusion 53 is smaller than the depth of the sixth receiving groove, a third groove wall 66 corresponding to the third protrusion 53 is formed on the sixth sliding groove 65, the third groove wall 66 partially extends into the sixth receiving groove, the contact surface between the third groove wall 66 and the two third balls 9 is an inclined surface adapted to the installation of the third ball 9, and one third ball 9 is received in each fifth receiving groove.

First slide structure, second slide structure and third slide structure are all through the cooperation of ball and spout, realize the relatively independent mobility control in the module all directions of making a video recording.

As shown in fig. 18, the outer base assembly further includes a magnetic conducting plate 33 and a magnetic conducting plate 34, the magnetic conducting plate 33 and the first magnet 42 are correspondingly installed inside the outer base 31, and the other magnetic conducting plate 34 is fixed on the flexible circuit board 327 on the back of the first coil 321.

As shown in fig. 6, the voice coil motor further includes an upper cover 2, the upper cover 2 is fixed on the inner base 41, and the moving plate 5 and the carrier assembly 6 are fixed in the cavity of the inner base 41.

As shown in fig. 1 and 2, the voice coil motor further includes a housing 1, the housing 1 sequentially covers the upper cover 2, the carrier assembly 6, the moving plate 5 and the outer base assembly in an inner cavity of the housing 1, and the housing 1 is provided with a notch for conveniently laying a power supply line of the flexible plate assembly 32.

The voice coil motor in this example can realize the fine setting of upper and lower, front and back, left and right sides orientation fast, makes the module of making a video recording accurate, stable focus, remedies the shake of waiting to shoot the thing, makes the module of making a video recording obtain better shooting effect.

It is noted that some of the structures may be selected differently than the specific examples given above. For example, the first slideway structure, the second slideway structure and the third slideway structure can also be realized by matching a roller fixed on one part with a sliding groove structure arranged on the other part; etc. which can be made by those skilled in the art based on their basic skills in understanding the concept of the present invention and are not to be construed as exemplary only.

Finally, it is to be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not intended to be limiting. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as within the scope of the invention.

Claims

1. The utility model provides a voice coil motor for module of making a video recording which characterized in that includes: an outer chassis assembly, an inner chassis assembly, a moving plate and a carrier assembly;

2. The voice coil motor of claim 1, wherein the sliding directions provided by the first ramp structure, the second ramp structure and the third ramp structure are perpendicular two by two.

3. The voice coil motor of claim 1, wherein the first magnet comprises two magnets arranged along the axis of the inner base and magnetized in opposite directions, and the second magnet and the third magnet are both a magnet magnetized in a radial direction.

4. The vcm according to claim 1 or 3, wherein the outer base assembly further comprises two magnetic conductive plates, one of the magnetic conductive plates is mounted inside the outer base corresponding to the first magnet, and the other magnetic conductive plate is fixed to the flexible circuit board on the back of the first coil.

5. The voice coil motor of claim 1, wherein the flexible board assembly further comprises a first chip, a second chip, and a third chip disposed on the flexible board, the first chip, the second chip, and the third chip being used to control current in the first coil, the second coil, and the third coil, respectively.

6. The vcm according to claim 5, wherein the first chip, the second chip and the third chip are respectively disposed at the center positions of the first coil, the second coil and the third coil, and are further configured to respectively detect a magnetic field signal, send the detected magnetic field signal to a control element of the vcm, and receive a control current signal sent by the control element.

7. The voice coil motor of claim 1, wherein the first ramp structure comprises: the first accommodating groove and the second accommodating groove are formed in the inner base, the first ball is mounted in the first accommodating groove and the second accommodating groove, the first ball and the second ball are arranged on the first sliding groove and the second sliding groove in the inner side wall of the outer base in a corresponding mode respectively to the first accommodating groove and the second accommodating groove, and the first ball can slide along the first sliding groove and the second sliding groove.

8. The voice coil motor according to claim 7, wherein the second receiving groove receives two of the first balls, the two first balls are arranged in parallel in a direction perpendicular to a sliding direction, a first protrusion is disposed in the second receiving groove to separate the two first balls, and the first balls near the end of the inner base slide in the second sliding groove; the contact surface of the first protrusion and the first ball is an inclined surface adapted to the installation of the first ball, the height of the first protrusion is smaller than the depth of the second accommodating groove, the part of the first groove wall corresponding to the second sliding groove and the first protrusion extends into the second accommodating groove, and the contact surface of the first groove wall side wall and the first ball is an inclined surface adapted to the installation of the first ball.

9. The voice coil motor of claim 1, wherein the second ramp structure comprises: the third accommodating groove and the fourth accommodating groove are arranged on the bottom surface of the inner base, the second ball arranged in the third accommodating groove and the fourth accommodating groove is arranged on the third sliding groove and the fourth sliding groove on the end surface of the movable plate correspondingly to the third accommodating groove and the fourth accommodating groove respectively, and the second ball can slide along the third sliding groove and the fourth sliding groove.

10. The voice coil motor of claim 9, wherein the fourth receiving groove receives two of the second balls, the two of the second balls are disposed in parallel in a direction perpendicular to the sliding direction, the fourth receiving groove is disposed with a second protrusion separating the two of the second balls, a contact surface between the second protrusion and the two of the second balls is an inclined surface adapted to the second balls, a height of the second protrusion is smaller than a groove depth of the fourth receiving groove, a middle portion of the fourth sliding groove is disposed with a second groove wall corresponding to the second protrusion, the second groove wall partially extends into the fourth receiving groove, and a contact surface between the second groove wall and the two of the second balls is an inclined surface adapted to the second balls.

11. The voice coil motor of claim 1, wherein the third ramp structure comprises: the third ball bearing is arranged in the fifth accommodating groove and the sixth accommodating groove, is arranged on the bottom surface of the carrier and corresponds to the fifth accommodating groove and the sixth accommodating groove respectively, and slides along the fifth sliding groove and the sixth sliding groove.

12. The voice coil motor as claimed in claim 11, wherein the sixth receiving groove receives two of the third balls, the two of the third balls are disposed in parallel in a direction perpendicular to the sliding direction, a third protrusion is disposed in the sixth receiving groove and separates the two of the third balls, a contact surface between the third protrusion and the two of the third balls is an inclined surface adapted to the third balls, a height of the third protrusion is smaller than a depth of the third receiving groove, a third groove wall corresponding to the third protrusion is disposed in a middle portion of the sixth sliding groove, the third groove wall extends into the sixth receiving groove, and a contact surface between the third groove wall and the two of the third balls is an inclined surface adapted to the third balls.

13. The voice coil motor of claim 1, further comprising an upper cover secured to the inner base, securing the moving plate and the carrier assembly in a cavity of the inner base.

14. The voice coil motor of claim 13, further comprising a housing that sequentially snaps the top cover, the carrier assembly, the moving plate, and the outer chassis assembly into an interior cavity of the housing, the housing providing a gap that facilitates routing of the power supply line to the flex assembly.