CN115685481A

CN115685481A - Voice coil motor, camera and electronic equipment

Info

Publication number: CN115685481A
Application number: CN202110846335.5A
Authority: CN
Inventors: 王伟丞
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2023-02-03

Abstract

The invention provides a voice coil motor, which comprises a first base, a cover body covering the first base, a first coil component arranged between the first base and the cover body, a second coil component accommodated in an inner cavity of the first coil component, and a magnetic component arranged on the first base and positioned between the first coil component and the second coil component, wherein the first coil component is arranged between the first base and the cover body; after the first coil assembly is electrified, electromagnetic force is generated between the first coil assembly and the magnetic assembly so as to drive the first coil assembly and the second coil assembly to move together along the axial direction; after the second coil component is electrified, electromagnetic force is generated between the second coil component and the magnetic component so as to drive the second coil component to move relative to the first coil component. The invention also provides a camera and an electronic device with the voice coil motor.

Description

Voice coil motor, camera and electronic equipment

Technical Field

The invention relates to the field of electric control devices, in particular to a voice coil motor, a camera provided with the voice coil motor and electronic equipment provided with the camera.

Background

The anti-shake of the camera in the existing market is divided into lens anti-shake and body anti-shake, wherein the lens anti-shake utilizes the displacement of a lens group to change and correct a light path during shaking so as to achieve an anti-shake compensation effect; the anti-shake camera body is used for anti-shake compensation for displacement of the photosensitive chip, and the conventional suspension-wire OIS anti-shake camera lens generally adopts a suspension-wire OIS motor to realize anti-shake. However, when the conventional suspension OIS motor is used, the driving magnet of the suspension OIS motor moves relative to the lens holder, and therefore, the driving magnet may cause magnetic interference to other magnetic elements on the camera head, which may affect the normal operation of other elements.

Disclosure of Invention

The invention aims to provide a voice coil motor which can avoid magnetic interference and realize an automatic focusing function and an OIS anti-shake function, a camera provided with the voice coil motor and electronic equipment provided with the camera.

In order to solve the above technical problems, the present invention provides a voice coil motor, which includes a first base, a cover covering the first base, a first coil assembly disposed between the first base and the cover, a second coil assembly disposed in an inner cavity of the first coil assembly, and a magnetic assembly disposed on the first base and between the first coil assembly and the second coil assembly; after the first coil assembly is electrified, electromagnetic force is generated between the first coil assembly and the magnetic assembly so as to drive the first coil assembly and the second coil assembly to move together along the axial direction; electromagnetic force is generated between the second coil assembly and the magnetic assembly after the second coil assembly is electrified so as to drive the second coil assembly to move relative to the first coil assembly.

The invention also provides a camera which comprises a voice coil motor, a lens module and a photosensitive chip arranged on the voice coil motor, wherein the lens module is connected to the second coil component of the voice coil motor, and the voice coil motor drives the first coil component to move so as to drive the lens module to move along with the second coil component along the axial direction; the voice coil motor drives the second coil assembly to move so as to drive the lens module to move along a plane perpendicular to the axial direction, and the voice coil motor drives the photosensitive chip to move relative to the lens module.

The invention also provides electronic equipment which comprises a shell, a mainboard and a camera, wherein the mainboard and the camera are arranged in the shell, and the camera is arranged in the shell and is electrically connected with the mainboard.

The automatic focusing of the voice coil motor provided by the invention realizes that the first coil component and the second coil component attached with a lens move relative to the first base through the matching of the first coil component and the magnetic component positioned on the first base; and the first OIS anti-shake of the voice coil motor realizes the movement of the second wire assembly attached with the lens relative to the first base on an XOY plane through the matching of the second coil assembly and the magnetic assembly positioned on the first base. Therefore, the automatic focusing of the voice coil motor and the first OIS anti-shake can independently move relative to the first base respectively, the first base is kept unmoved, namely the magnetic assembly positioned on the first base is unmoved relative to the mirror base when the voice coil motor works, so that the magnetic interference of the magnetic assembly on other magnetic elements on the camera is avoided, and the normal work of the other magnetic elements is not influenced; secondly, voice coil motor's auto focus and first OIS anti-shake sharing magnetic component, the cooperation of first coil pack and magnetic component realizes promptly auto focus to and the cooperation of second coil pack and magnetic component realizes first OIS anti-shake has not only promoted voice coil motor's anti-shake performance and has reduced the part and reduce manufacturing cost, and can reduce voice coil motor axial dimensions to reduce voice coil motor and occupy electron device's inner space, be favorable to electron device's other electron device's overall arrangement.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a voice coil motor according to an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the voice coil motor of FIG. 1;

FIG. 3 is a schematic perspective view of the voice coil motor of FIG. 2 from another perspective;

FIG. 4 is a schematic diagram of a further perspective structure of the voice coil motor in FIG. 2;

FIG. 5 is a schematic perspective view of the voice coil motor of FIG. 4 from another perspective;

fig. 6 is an enlarged perspective view of the auto-focusing mechanism and the first OIS anti-shake mechanism of fig. 2;

fig. 7 is a schematic perspective view illustrating another view angle of the auto-focusing mechanism and the first OIS anti-shake mechanism in fig. 6;

fig. 8 is a perspective cross-sectional view of the assembled auto-focus mechanism and first OIS anti-shake mechanism of fig. 6 from one perspective;

fig. 9 is a perspective cross-sectional view of the assembled auto-focus mechanism and first OIS anti-shake mechanism of fig. 6 from another perspective;

fig. 10 is an enlarged perspective view of the second body anti-shake mechanism of fig. 4;

fig. 11 is a perspective view of the second body anti-shake mechanism of fig. 10 from another perspective;

FIG. 12 is an exploded perspective view of the coil module of FIG. 10;

fig. 13 is an enlarged perspective view of the circuit board module of fig. 4;

FIG. 14 is a perspective cross-sectional view of one of the views of the voice coil motor of FIG. 1;

FIG. 15 is a perspective cross-sectional view of another perspective of the voice coil motor of FIG. 1;

FIG. 16 is a perspective cross-sectional view of yet another perspective of the voice coil motor of FIG. 1;

fig. 17 is a schematic perspective view of a camera according to an embodiment of the present invention;

fig. 18 is a schematic perspective view of an electronic device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 5, fig. 1 is a schematic perspective view of a voice coil motor 100 according to an embodiment of the present invention; fig. 2 is an exploded perspective view of the voice coil motor 100 of fig. 1; fig. 3 is a schematic perspective view of the voice coil motor 100 in fig. 2 from another perspective;

fig. 4 is a schematic perspective view of the voice coil motor 100 in fig. 2; fig. 5 is a schematic perspective view of the voice coil motor 100 in fig. 4 from another perspective. The voice coil motor 100 provided in one embodiment of the present invention includes a first base 22, a cover 24 covering the first base 22, a first coil assembly 26 disposed between the first base 22 and the cover 24, a second coil assembly 28 accommodated in an inner cavity of the first coil assembly 26, a magnetic assembly 27 disposed on the first base 22 and located between the first coil assembly 26 and the second coil assembly 28, a first elastic element 23, a second elastic element 25, a second base 52 disposed on a side of the first base 22 away from the cover 24, and a coil module 54 located on the second base 52; the magnetic component 27 is enclosed around the second coil component 28, the first coil component 26 is enclosed around the magnetic component 27, the first elastic component 23 is connected to the cover 24, the first coil component 26 and the second coil component 28, and the first elastic component 23 has a preset elastic force for pushing the second coil component 28 to approach the first coil component 26, so as to prevent the second coil component 28 from moving away from the first coil component 26 along the axial direction; the second elastic element 25 is connected to the first base 22 and the first coil assembly 26, and the first elastic element 23 and the second elastic element 25 are used for moving and resetting the first coil assembly 26 and the second coil assembly 28; the coil module 54 corresponds to the magnetic assembly 27. After the first coil assembly 26 is electrified, electromagnetic force is generated between the first coil assembly 26 and the magnetic assembly 27 so as to drive the first coil assembly 26 and the second coil assembly 28 to move together along the axial direction; after the second coil assembly 28 is powered on, electromagnetic force is generated between the second coil assembly 28 and the magnetic assembly 27 to drive the second coil assembly 28 to move relative to the first coil assembly 26, that is, the second coil assembly 28 is relative to the first base 22; the coil module 54 is energized to generate an electromagnetic force with the magnetic assembly 27 to drive the second base 52 and the coil module 54 to move relative to the first base 22. The first coil assembly 26 and the magnetic assembly 27 cooperate to form an auto-focusing mechanism, the first coil assembly 28 and the magnetic assembly 27 cooperate to form a first OIS anti-shake mechanism, and the coil module 54 and the magnetic assembly 27 cooperate to form a second OIS anti-shake mechanism. The axial direction refers to a direction parallel to the axis of the first coil assembly 26, i.e., the axial direction is the Z-axis direction as shown in the figure; the coil module 54 is a flat coil.

When the voice coil motor 100 is used, the first coil assembly 26 is electrified to generate a first electromagnetic force with the magnetic assembly 27, and the first electromagnetic force drives the second coil assembly 28 with the lens and the first coil assembly 26 to move along the axial direction so as to realize the automatic focusing function; the second coil assembly 28 is electrified to generate a second electromagnetic force between the second coil assembly and the magnetic assembly 27, and the second electromagnetic force drives the second coil assembly 26 with the lens to move along the XOY plane and/or axially rotate to counteract lens shake, so as to realize a first OIS anti-shake function; the coil module 54 is energized to generate a third electromagnetic force between the coil module and the magnetic assembly 27, so as to drive the second base 52 and drive the coil module 54 with the photo sensor chip to move along the XOY plane and/or axially rotate to counteract lens shake, thereby implementing a second OIS anti-shake function; thereby significantly improving the anti-shake performance of the voice coil motor 100. The axial rotation means that the axis of rotation of the second coil assembly 28 with the lens attached thereto is parallel to the axial direction of the first coil assembly 26, and the axis of rotation of the second base 52 and the coil module 54 is parallel to the axial direction of the second coil assembly 26. The photo chip is attached to the coil module 54, and the coil module 54 is disposed on the second base 52, i.e. the photo chip, the coil module 54 and the second base 52 are separated from the first base 2226, and the photo chip moves relative to the first base 52 along with the coil module 54.

The first coil assembly 26 of the voice coil motor 100 provided by the present invention is disposed between the first base 22 and the cover 24, the second coil assembly 28 is movably accommodated in the inner cavity of the first coil assembly 26, the magnetic assembly 27 is positioned on the first base 22 and surrounds the second coil assembly 28, and the first coil assembly 26 surrounds the magnetic assembly 27; the second base 52 is arranged on one side of the first base 22, which is far away from the cover 24, the coil module 54 is arranged on the second base 52, and the coil module 54 corresponds to the magnetic assembly 27; that is, the first coil element 26 and the second coil element 28 are disposed on one side of the first base 22, and the second base 52 and the coil module 54 are disposed on the opposite side of the first base 22. The auto-focusing of the voice coil motor 100 is realized by the first coil assembly 26 and the magnetic assembly 27 positioned on the first base 22, so that the first coil assembly 26 and the second coil assembly 28 with the lens attached move relative to the first base 22; the first OIS anti-shake of the voice coil motor 100 is realized by the second coil assembly 28 cooperating with the magnetic assembly 27 positioned on the first chassis 22 to move the second wire assembly 28 with the lens attached relative to the first chassis 22 in the XOY plane; the second OIS anti-shake of the voice coil motor 100 realizes the movement of the coil module 54 attached with the photosensitive chip in the XOY plane relative to the first base 22 through the cooperation of the coil module 54 and the magnetic assembly 27 positioned on the first base 22; therefore, the auto-focusing, the first OIS anti-shaking and the second OIS anti-shaking of the voice coil motor 100 can independently move relative to the first base 22, and the first base 22 remains unmoved, that is, the magnetic assembly 27 positioned on the first base 22 remains unmoved relative to the lens holder when the voice coil motor 100 works, so as to avoid the magnetic interference of the magnetic assembly 27 on other magnetic elements on the camera head, and not affect the normal work of other magnetic elements; secondly, since no magnet is provided on the second wire assembly 28, the weight of the second wire assembly 28 with the lens attached thereto is reduced, enhancing the reliability of the voice coil motor 100; in addition, the magnetic component 27 is shared by auto-focusing, first OIS anti-vibration and second OIS anti-vibration of the voice coil motor 100, that is, the first coil component 26 and the magnetic component 27 cooperate to realize the auto-focusing, the second coil component 28 and the magnetic component 27 cooperate to realize the first OIS anti-vibration, and the coil module 54 and the magnetic component 27 cooperate to realize the second OIS anti-vibration, so that the anti-vibration performance of the voice coil motor 100 is improved, the number of components is reduced, the manufacturing cost is reduced, the axial size of the voice coil motor 100 can be reduced, the internal space of the electronic device occupied by the voice coil motor 100 is reduced, and the layout of other electronic devices of the electronic device is facilitated.

The electromagnetic force between the second coil module 28 and the magnetic assembly 27 is used to drive the second coil assembly 28 of the attached lens to move relative to the first coil assembly 26 in a plane perpendicular to the axial direction, and/or drive the second coil assembly 28 to rotate relative to the first coil assembly 26 along an axis parallel to the axial direction. Specifically, the electromagnetic force between the second coil module 28 and the magnetic element 27 drives the second coil element 28 attached to the lens to move along the XOY plane to counteract the lens shake, so as to implement the first OIS anti-shake function.

The electromagnetic force between the coil block 54 and the magnetic assembly 27 drives the second base 52 and the coil block 54 to move in a plane perpendicular to the axial direction with respect to the first base 22, and/or drives the second base 52 and the coil block 54 to rotate along an axis parallel to the axial direction with respect to the first base 22. Specifically, the electromagnetic force between the coil module 54 and the magnetic assembly 27 after the coil module 54 is energized can drive the first base 22 and the coil module 54 attached with the photo sensor chip to move along the XOY plane and/or rotate in the Z-axis direction to counteract lens shake, so as to implement the second OIS anti-shake function.

Referring to fig. 4 to 7, fig. 6 is an enlarged perspective view of the auto-focusing mechanism and the first OIS anti-shake mechanism of fig. 2; fig. 7 is a schematic perspective view of the autofocus mechanism and the second OIS anti-shake mechanism of fig. 6 from another perspective. The first base 22 is a hollow frame, the first coil assembly 26, the second coil assembly 28 and the cover 24 are disposed on the top of the frame, the second base 52 is disposed on the bottom of the frame, and the inner cavity of the cover 24 is communicated with the inner cavity of the frame. A first through hole 222 is axially formed in the middle of the first base 22, and a plurality of positioning frames 220 are arranged on the top of the first base 22 around the first through hole 222; the magnetic assembly 27 includes magnetic members respectively positioned at the plurality of positioning frames 220, the first coil assembly 26 includes a first carrier 261 and a first coil 265 enclosed in the first carrier 261, the first carrier 261 is slidably sleeved outside the plurality of positioning frames 220, and the second coil assembly 28 is accommodated in an accommodating space enclosed by the plurality of positioning frames 220. In this embodiment, the first through hole 222 is a circular hole, the number of the plurality of positioning frames 220 is four, and four positioning frames 220 are uniformly arranged along the circumferential direction of the first through hole 222, that is, an included angle between every two adjacent positioning frames 220 is 90 degrees; the magnetic assembly 27 includes four magnetic members respectively positioned within the four positioning frames 220. The first base 22 includes a first supporting plate 221, a first through hole 222 is opened in the middle of the first supporting plate 221, a plurality of positioning frames 220 are protruded on the top surface of the first supporting plate 221, and each positioning frame 220 is provided with a positioning cavity 2201 for positioning a corresponding magnetic member. The positioning cavity 2201 of each positioning frame 220 penetrates through the side surface of the positioning frame 220 facing the first through hole 220, and/or the positioning cavity 2201 of each positioning frame 220 penetrates through the first support plate 221; in this embodiment, the positioning cavity 2201 of each positioning frame 220 penetrates through the side of the positioning frame 220 facing the first through hole 220 to form a first through slot 2203, and the positioning cavity 2201 of each positioning frame 220 penetrates through the first support plate 221 to form a second through slot 2205. A plurality of positioning blocks 223 are disposed on the top surface of the first supporting plate 221 around the through hole 222, and the positioning blocks 223 are used for connecting the second elastic element 25 to the first base 22. Preferably, the plurality of positioning blocks 223 are arranged in a circle at equal intervals in the circumferential direction of the through hole 222. Positioning rings 224 are arranged on the top surface of the first supporting plate 221 at the peripheries of the positioning blocks 223, a guide chute 225 is formed between the positioning rings 224 and the positioning frames 220, and the guide chute 225 is used for accommodating the first coil assembly 26; the inner peripheral surface of the positioning ring 224 serves to position the cover 24.

In this embodiment, the first support plate 221 is a rectangular plate, the positioning block 223 is protruded from the top surface of the first support plate 221 near each corner, the positioning ring 224 is a rectangular ring surrounding the periphery of the four positioning blocks 223, and a sliding guide slot 225 is formed between each positioning block 223 and the positioning ring 224; the outer peripheral surface of the cover 24 contacts the inner peripheral surface of the positioning ring 224, so that the cover 24 is firmly connected to the first base 22.

In other embodiments, the first support plate 221 may be, but is not limited to, a circular plate, a polygonal plate, an elliptical plate, etc., the first through hole 222 may be, but is not limited to, a circular hole, a polygonal hole, an elliptical hole, etc., and the positioning ring 224 may be, but is not limited to, a circular ring, a polygonal ring, an elliptical ring, etc. The positioning ring 224 is disposed around the positioning blocks 223, such that a guiding slot 225 is formed between each positioning block 223 and the positioning ring 224.

In other embodiments, the cover 24 can be connected to the first base 22 by, but not limited to, snapping, gluing, or screwing.

Preferably, the plurality of positioning blocks 223 are uniformly spaced along the circumferential direction of the first through hole 222. In this embodiment, the first support plate 221 is provided with 4 positioning blocks 223 around the first through hole 222, and each positioning block 223 is a fixing piece extending from the first support plate 221 to a corner corresponding to the first through hole 222.

The bottom edge of the first support plate 221 extends to a side away from the positioning ring 224 to form a limiting ring 227, the limiting ring 227 and the first support plate 221 enclose an accommodating space 228 for communicating the first through hole 222 and the second through hole 2205, and the accommodating space 228 is used for accommodating the second base 52 and the coil module 54. The retaining ring 227 is provided with a position avoiding opening 2270 at the side away from the retaining ring 224. In this embodiment, the stop collar 227 is a rectangular collar. In other embodiments, the stop collar 227 may be, but is not limited to, a circular ring, a polygonal ring, an elliptical ring, or the like. A plurality of first positioning portions 229 are arranged on the bottom surface of the first support plate 221 around the first through hole 222, and the plurality of first positioning portions 229 are arranged at least one turn along the circumferential direction of the first through hole 222; preferably, the first positioning portions 229 are arranged at regular intervals in a circle along the circumference of the first through hole 222. In this embodiment, the four corners of the first supporting plate 221 are respectively provided with a first positioning portion 229, and a side surface of each first positioning portion 229 away from the cover 24 is provided with a first universal ball groove 2290. Preferably, the inner surface of the first universal ball groove 2290 is provided with an anti-collision piece made of hard and abrasion-resistant material.

The cover 24 includes a cover 241 and a side plate 242 surrounding the cover 241, and the cover 241 and the side plate 242 form an accommodating space 243. The receiving space 243 is used for receiving the first coil assembly 26, the second coil assembly 28, and the magnetic assembly 27. A through hole 244 is formed in the middle of the cover plate 241, the through hole 244 is used for the lens to pass through, and the side plate 242 is used for being fixedly connected to the first base 22; specifically, the side plate 242 is clamped to the inner peripheral surface of the positioning ring 224 of the first base 22. In this embodiment, the cover plate 241 is a rectangular plate, the four edges of the rectangular plate are respectively provided with a side plate 242, and the four side plates 242 are connected end to end.

The cover plate 241 has a plurality of connecting portions 247 at an inner side thereof, and the plurality of connecting portions 247 are used for connecting the first elastic member 23. Specifically, the inner side surface of the cover plate 241 is provided with a plurality of connecting portions 247 around the through hole 244; preferably, the plurality of connecting portions 247 are arranged at regular intervals in a circumferential direction of the penetration hole 244. In this embodiment, the inner side surface of the cover plate 241 is provided with 4 connecting portions 247, that is, the four corners of the inner side surface of the cover plate 241 are respectively provided with the connecting portions 247. The cover 241 has at least one positioning groove 2412, and the positioning groove 2412 is used for accommodating the magnetic induction driving element 291. A plurality of metal wires 248 are embedded in the cover 24, and the metal wires 248 are used for electrically connecting the first coil assembly 26, the second coil assembly 28 and the magnetic induction driving element 291; one end of each of the metal wires 248 extends out of the cover 24 to form a plurality of connection terminals, wherein the connection terminals include positive and negative terminals, signal terminals, and working voltage terminals; the magnetic induction drive elements 291 are soldered to the corresponding metal leads 248 in the cover 241. Part of the metal wire 248 extends to the connection portion 247, and the first elastic member 23 can be connected to the metal wire 248 at the connection portion 247 by soldering.

The first carrier 261 is a bobbin, and the bobbin is fixed to the first coil 265 by an integral winding method. The first carrier 261 includes a second supporting plate 2610 and a first carrying frame 2611 surrounding the second supporting plate 2610, and the first coil 265 is wound around the first carrying frame 2611; the second supporting plate 2610 is provided with a plurality of through slots 2613 corresponding to the plurality of positioning frames 220 of the first base 22, and the plurality of positioning frames 220 are respectively inserted into the plurality of through slots 2613, so that the first supporting frame 2611 surrounds the plurality of positioning frames 220. The second supporting plate 2610 and the first supporting frame 2611 enclose a receiving space 2614, the through slots 2613 are communicated with the receiving space 2614, and the receiving space 2614 is used for receiving the second coil assembly 28. The first carrier 261 is axially provided with second through holes 2615 penetrating through the top and bottom surfaces thereof, and particularly, the second through holes 2615 are located at the middle of the second support plate 2610. The top surface refers to the surface which faces the same direction as the light inlet hole of the lens, and the bottom surface refers to the surface which faces the opposite direction of the light inlet hole of the lens. In this embodiment, the second supporting plate 2610 is a rectangular plate, the first supporting frame 2611 is a rectangular frame, the second supporting plate 2610 is a rectangular plate, and through slots 2613 are respectively formed at four sides of the second supporting plate 2610, that is, four through slots 2613 are formed in the second supporting plate 2610, and each through slot 2613 is close to a corresponding side wall of the first supporting frame 2611. The top surface of the first supporting frame 2611 is provided with a connecting block 2616 for connecting the first elastic member 23, and specifically, each corner of the top surface of the first supporting frame 2611 is provided with a connecting block 2616. A plurality of second universal ball grooves 2612 are arranged on the top surface of the second support plate 2610 around the second through hole 2615, and preferably, the plurality of second universal ball grooves 2612 are uniformly arranged at intervals along the circumferential direction of the second through hole 2615; in this embodiment, the top surface of the second support plate 2610 is provided with four second universal ball grooves 2612. The top surface of the first carrier 261 is provided with a plurality of first impact bosses 2617, and the first impact bosses 2617 prevent the lens attached to the second coil assembly 28 from being directly impacted, so that the lens has a protective effect. In this embodiment, the top surface of the first carrier 261 is provided with four pairs of second impact bosses 2617, and the four pairs of second impact bosses 2617 are arranged in a circle along the circumferential direction of the first carrier 261. The first coil 265 is electrically connected to the metal wire 248 in the cover 24 through the first elastic member 23.

The first carrier 261 is provided with an induction magnet 293 corresponding to the magnetic induction driving element 291 on the cover 24, and the magnetic induction driving element 291 is matched with the induction magnet 293 to feed back the actual motion track of the first carrier 261 relative to the cover 24, so as to adjust the current intensity and/or the current direction of the first coil 265, so that the motion track of the first carrier 261 is more accurate, and the focusing of the auto-focusing mechanism of the voice coil motor 100 is more accurate. Specifically, when the first carrier 261 moves in the axial direction relative to the cover 24 for AF focusing, the magnetic flux variation generated between the magnetic induction driving element 291 and the induction magnet 293 is calculated, so as to achieve the AF closed-loop control effect.

The bottom surface of the first carrier 261 is provided with a first positioning groove 2601 and a plurality of second striking bosses 2618 around the second through hole 2615, and the first positioning groove 2601 is used for positioning the second elastic element 25. The second impact protrusion 2618 prevents the lens attached to the second coil assembly 28 from being directly impacted, and has a protective effect. In this embodiment, four pairs of second impact bosses 2618 are disposed on the bottom surface of the first carrier 261, the four pairs of second impact bosses 2618 are arranged in a circle along the circumferential direction of the first carrier 261, and the four pairs of second impact bosses 2618 respectively correspond to the four pairs of first impact bosses 2617 in the axial direction.

The magnetic assembly 27 includes at least one pair of first magnetic members 271 located at two opposite sides of the second coil assembly 28 and at least one pair of second magnetic members 273 located at the other opposite sides of the second coil assembly 28, wherein the polarities of the two opposite sides of the pair of first magnetic members 271 are the same, and the polarities of the two opposite sides of the pair of second magnetic members 273 are the same. Specifically, the first magnetic member 271 and the second magnetic member 273 are both magnets, both sides of the pair of first magnetic members 271 facing each other may be both S-poles, and both sides of the pair of second magnetic members 273 facing each other may be both N-poles; or both sides of the pair of first magnetic members 271 facing each other may be N-poles, and both sides of the pair of second magnetic members 273 facing each other may be S-poles. In this embodiment, both sides of the pair of first magnetic members 271 facing each other are S-poles, and both sides of the pair of second magnetic members 273 facing each other are N-poles. The pair of first magnetic members 271 and the pair of second magnetic members 273 are respectively accommodated in the positioning cavities 2201 of the four positioning frames 220 of the first base 22, the pair of first magnetic members 271 and the pair of second magnetic members 273 are used for being arranged around the second coil assembly 28, and the first coil 265 is arranged around the pair of first magnetic members 271 and the pair of second magnetic members 273.

The second coil assembly 28 includes a second carrier 281 and at least one pair of second coils 283 disposed on the second carrier 281, wherein a current flows through the at least one pair of second coils 283, and an electromagnetic force is generated between the at least one pair of second coils 283 and the magnetic member of the magnetic assembly 27 to drive the second coil assembly 28 to move along a first direction relative to the first base 22, wherein the first direction is perpendicular to the axial direction. Specifically, the second carrier 281 is a bobbin, and a mounting hole 2810 penetrating through the top surface and the bottom surface of the second carrier 281 is axially formed in the middle of the second carrier 281, and the mounting hole 2810 is used for connecting a lens. The second carrier 281 is provided with a pair of second coils 283 at two opposite sides of the mounting hole 2810, a side winding coil of each second coil 283, that is, each second coil 283 is wound at one side of the second carrier 281, and the second coils 283 are electrically connected to the metal wires 248 of the cover 24. In this embodiment, the second carrier 281 is a rectangular frame, that is, the second carrier 281 includes four outer side surfaces, each of the outer side surfaces is protruded with a positioning block 2811, and each of the second coils 283 is wound on the positioning block 2811 of the corresponding side surface of the second carrier 281. When the second coil assembly 28 is accommodated in the accommodating space 2614 of the first carrier 261, the second coil assembly 28 is supported on the top surface of the second supporting plate 2610, the plurality of positioning frames 220 are arranged around the second coil assembly 28, and at least one pair of positioning frames 220 corresponds to at least one pair of second coils 283. In this embodiment, the pair of first magnetic members 271 corresponds to at least one pair of second coils 283, and when a current is passed through the pair of second coils 283, an electromagnetic force is generated between the pair of second coils 283 and the pair of first magnetic members 271 so as to drive the second coil assembly 28 to move along a first direction relative to the first carrier 261, wherein the first direction is perpendicular to the axial direction, that is, the second coil assembly 28 moves along the Y-axis. When the direction of the current inputted into the pair of second coils 283 is changed, the second coil assembly 28 can be driven to change the moving direction by the electromagnetic force generated between the pair of second coils 283 and the pair of first magnetic members 271.

In some embodiments, the second coil assembly 28 includes two pairs of second coils 283 corresponding to the pair of first magnetic members 271, i.e., the two pairs of second coils 283 correspond to the pair of first magnetic members 271, respectively; specifically, two second coils 283 are wound on a pair of outer side surfaces of the second carrier 261, respectively, so that two pairs of second coils 283 are formed. When currents of different magnitudes are conducted in the two pairs of second coils 283, electromagnetic forces of different magnitudes are respectively generated between the two pairs of second coils 283 and the pair of first magnetic members 271, so that the second coils 283 and the first magnetic members 271 generate different driving forces to form moments, so as to drive the second coil assembly 28 to rotate relative to the first base 22 along an axis parallel to the axial direction, that is, the second coil assembly 28 rotates relative to the first carrier 261 along an axis parallel to the axial direction. When the same current is applied to the two pairs of second coils 283, the electromagnetic force generated between the two pairs of second coils 283 and the pair of first magnetic members 271 drives the second coil assembly 28 to move along the direction perpendicular to the axial direction, i.e. along the Y-axis, relative to the first carrier 261; when the direction of the current inputted into the two second coils 283 is changed, the electromagnetic force generated between the two pairs of second coils 283 and the pair of first magnetic members 271 can drive the second coil assembly 28 to change the moving direction.

In some embodiments, the second coil assembly 28 further comprises at least one pair of third coils 285 disposed on the second carrier 281, a current is passed through the at least one pair of third coils 285, and an electromagnetic force is generated between the at least one pair of third coils 285 and the magnetic members of the magnetic assembly 27 to drive the second coil assembly 28 to move in a second direction with respect to the first base 22, and the second direction is perpendicular to the first direction. Specifically, the second carrier 281 is provided with a pair of third coils 285 at the other two sides opposite to the mounting hole 2810, a side-winding coil of each third coil 285, that is, each third coil 285 is wound at one side of the second carrier 281, and the third coils 285 are electrically connected to the metal wires 248 of the cover 24. Each third coil 285 is wound around a positioning block 2811 on the corresponding side of the second carrier 281. When the second coil assembly 28 is received in the receiving space 2614 of the first carrier 261, the second coil assembly 28 is supported on the top surface of the second support plate 2610, the pair of second magnetic members 273 correspond to the at least one pair of third coils 285, and when a current is passed through the pair of third coils 285, an electromagnetic force is generated between the pair of third coils 285 and the pair of second magnetic members 273 to drive the second coil assembly 28 to move relative to the first carrier 261 along a second direction, which is perpendicular to the axial direction and the first direction, that is, the second coil assembly 28 moves along the X-axis. When the direction of the current inputted into the pair of third coils 285 is changed, the second carrier 281 can be driven to change the moving direction by the electromagnetic force generated between the pair of third coils 285 and the pair of second magnetic members 273.

In some embodiments, the second coil assembly 28 includes two pairs of third coils 285 corresponding to the pair of second magnetic pieces 273, i.e., two pairs of third coils 285 respectively correspond to the pair of second magnetic pieces 273; when currents of different magnitudes are applied to the two pairs of third coils 285, electromagnetic forces of different magnitudes are generated between the two pairs of third coils 285 and the pair of second magnetic members 273, respectively, and the two pairs of third coils 285 and the pair of second magnetic members 273 generate different driving forces to generate torque, so as to drive the second coil assembly 28 to rotate relative to the first base 22 along an axis parallel to the axial direction, that is, the second coil assembly 28 rotates relative to the first carrier 261 along an axis parallel to the axial direction. When the same amount of current is applied to the two pairs of third coils 285, an electromagnetic force is generated between the two pairs of third coils 285 and the pair of second magnetic members 273 to drive the second coil assembly 28 to move in a direction perpendicular to the axial direction, i.e., along the X-axis, with respect to the first base 22; when the direction of the current inputted into the two third coils 285 is changed, the second coil assembly 28 can be driven to change the moving direction by the electromagnetic force generated between the two pairs of third coils 285 and the pair of the second magnetic members 273.

In this embodiment, the second carrier 281 is provided with a pair of second coils 283 at two opposite sides thereof, and a pair of third coils 285 at two opposite sides thereof, when the second coil assembly 28 is accommodated in the accommodating space 2614 of the first carrier 261, the pair of second coils 283 corresponds to the pair of first magnetic members 271, and the pair of third coils 285 corresponds to the pair of second magnetic members 273; when a current is applied to the pair of second coils 283, an electromagnetic force is generated between the pair of second coils 283 and the pair of first magnetic members 271 to drive the second coil assembly 28 to move in the first direction with respect to the first carrier 261, i.e., the second coil assembly 28 moves along the Y-axis. When the direction of the current input into the pair of second coils 283 is changed, the electromagnetic force generated between the pair of second coils 283 and the pair of first magnetic members 271 can drive the second coil assembly 28 to change the moving direction; when current is passed in the pair of third coils 285, electromagnetic force is generated between the pair of third coils 285 and the pair of second magnetic members 273 to drive the second coil assembly 28 to move in the second direction with respect to the first carrier 261, i.e., the second coil assembly 28 moves along the X-axis. When the direction of the current inputted into the pair of third coils 285 is changed, the second coil assembly 28 can be driven to change the moving direction by the electromagnetic force generated between the pair of third coils 285 and the pair of second magnetic members 273; when current is simultaneously passed through the pair of second coils 283 and the pair of third coils 285 and the currents are different in magnitude, the moment generated by the driving force generated by the pair of second coils 283 and the pair of first magnetic members 271 is different from the moment generated by the driving force generated by the pair of third coils 285 and the pair of second magnetic members 273, so as to drive the second coil assembly 28 to move in the corresponding direction with respect to the first carrier 261.

The top surface of the second carrier 281 is provided with a second positioning slot 2812 around the mounting hole 2810, and the second positioning slot 2812 is used for connecting the first elastic element 23. The top surface of the first carrier 261 is provided with a plurality of third impact bosses 2813, and the third impact bosses 2813 prevent the lens attached to the second carrier 281 from being directly impacted, so that the protection effect is achieved. The second coil 283 and the third coil 285 on the second carrier 281 are electrically connected to the metal wire 248 in the cover 24 through the first elastic member 23. A plurality of third universal ball grooves 2815 are formed in the bottom surface of the second carrier 281 and around the mounting hole 2810, and in this embodiment, the third universal ball grooves 2815 are formed at four corners of the bottom surface of the second carrier 281.

The second carrier 281 has a first magnetic induction driving element 295 corresponding to the first magnetic member 271 and a second magnetic induction driving element 296 corresponding to the second magnetic member 273, and the first magnetic induction driving element 295 and the second magnetic induction driving element 296 are electrically connected to the metal wires 248 of the cover 24, respectively. In this embodiment, the first magnetic induction driving element 295 is disposed on the side of the second carrier 281 corresponding to the first magnetic element 271, and when the first magnetic induction driving element 295 attached to the second carrier 281 is activated, the operation is performed with the variation of the magnetic flux generated by the first magnetic element 271, so as to control the second coil assembly 28 to move along the Y axis and rotate along the axis parallel to the Z axis; the second magnetic induction driving element 296 is disposed on the side surface of the second carrier 281 corresponding to the second magnetic member 273, and when the second magnetic induction driving element 296 attached to the second carrier 281 is activated, the operation is performed with the magnetic flux variation generated by the second magnetic member 273, so as to control the second coil assembly 28 to move along the X-axis and rotate along the axis parallel to the Z-axis simultaneously.

As shown in fig. 6 and 7, the first elastic element 23 is connected between the cover 241, the first carrier 261 and the second carrier 281, and the second elastic element 25 is connected between the first carrier 261 and the first base 22. In this embodiment, the first elastic element 23 is an elastic piece, the first elastic element 23 includes a first connecting ring 231 surrounding the second coil assembly 28 and a plurality of first positioning portions 233 connected to the outer periphery of the first connecting ring 231, and each first positioning portion 233 is connected between the cover 24 and the first connecting ring 231. Specifically, the first connecting ring 231 is a closed ring surrounded by thin strips, the first connecting ring 231 is provided with a plurality of fixing portions 2312 at the periphery thereof, the plurality of first positioning portions 233 are respectively connected to the plurality of fixing portions 2312, and the first connecting ring 231 and the plurality of fixing portions 2312 are used for being connected to the second carrier 281. In this embodiment, the inner diameter of the first connection ring 231 is equal to or slightly larger than the diameter of the mounting hole 2810 of the second carrier 281; the number of the fixing portions 2312 is four, and the four fixing portions 2312 are uniformly arranged at intervals along the circumferential direction of the first connection ring 231; the number of the first positioning portions 233 is four, four first positioning portions 233 are respectively connected to the four fixing portions 2312, and the four first positioning portions 233 are uniformly spaced apart along the circumferential direction of the first connection ring 231. Each fixing portion 2312 is a tab connected to the first connection ring 231. Each first positioning portion 233 includes a first connecting strip 2331 connected to the fixing portion 2312 and having elasticity, a first positioning plate 2332 connected to an end of the first connecting strip 2331 far from the fixing portion 2312, a second connecting strip 2335 connected to a side of the first positioning plate 2332 far from the first connecting strip 2331 and having elasticity, and a second positioning plate 2336 connected to an end of the second connecting strip 2335 far from the first positioning plate 2332, wherein the first positioning plate 2332 is connected to a connecting block 2616 of the first carrier 261, and the second positioning plate 2336 is connected to a connecting portion 247 of the cover 24. The middle portions of the first connecting bar 2331 and the second connecting bar 2335 are provided in a curved shape.

The second elastic member 25 is an elastic sheet, the second elastic member 25 includes a second connection ring 251 surrounding the first coil assembly 26 and a plurality of second positioning portions 253 connected to the outer periphery of the second connection ring 251, and each second positioning portion 253 is connected between the first base 22 and the second connection ring 261. Specifically, the second connection ring 261 is a closed ring surrounded by a thin strip, a plurality of fixing portions 2512 are disposed on the outer circumference of the second connection ring 261, a plurality of second positioning portions 253 are respectively connected to the plurality of fixing portions 2512, and the second connection ring 251 and the plurality of fixing portions 2512 are used for being connected to the first carrier 261. In this embodiment, the inner diameter of the second connection ring 251 is equal to or slightly larger than the diameter of the second through hole 2615 of the first carrier 261; the number of the fixing portions 2512 is four, and the four fixing portions 2512 are uniformly arranged at intervals along the circumferential direction of the second connection ring 251; the number of the second positioning portions 253 is four, four second positioning portions 253 are respectively connected to the four fixing portions 2512, and the four second positioning portions 253 are uniformly spaced apart along the circumferential direction of the second connection ring 251. Each fixing portion 2512 is a tab attached to the secondary attachment ring 251. Each second positioning portion 233 includes a third connecting strip 2531 connected to the fixing portion 2512 and having elasticity, and a third positioning piece 2532 connected to one end of the third connecting strip 2531 far from the fixing portion 2512, where the third positioning piece 2532 is used for connecting the first base 22. The middle portion of the third connecting strip 2531 is provided in a curved shape.

The first carrier 261 and the second carrier 281 are connected by a plurality of first ball transfer elements 286, the plurality of first ball transfer elements 286 are arranged along the circumferential direction of the second coil assembly 28, and the first carrier 261 and the second carrier 281 have a space therebetween, so that the second carrier 281 can move relative to the first carrier 261 by the first ball transfer elements 286. Specifically, the plurality of first universal balls 286 are respectively received in the plurality of second universal ball grooves 2612 of the first carrier 261 and the plurality of third universal ball grooves 2815 of the second carrier 281, the depths of the second universal ball grooves 2612 and the third universal ball grooves 2815 are both smaller than the radius of the first universal balls 286, and when the first universal balls 286 are received in the second universal ball grooves 2612 and the corresponding third universal ball grooves 2815, the first universal balls 286 partially extend out of the second universal ball grooves 2612 and the third universal ball grooves 2815. In this embodiment, the number of the first universal balls 286 is four, and the four first universal balls 286 are respectively accommodated in the four second universal ball grooves 2612 of the first carrier 261 and the four third universal ball grooves 2815 of the second carrier 281.

Referring to fig. 6 to 9, fig. 8 is a perspective cross-sectional view of an assembled view of the auto-focusing mechanism and the first OIS anti-shake mechanism of fig. 6; fig. 9 is a perspective cross-sectional view of another perspective view of the assembled auto-focusing mechanism and first OIS anti-shake mechanism of fig. 6. When the auto-focusing mechanism and the first OIS anti-shake mechanism of the voice coil motor 100 are assembled, the pair of first magnetic members 271 and the pair of second magnetic members 273 are respectively positioned in the positioning cavities 2201 of the four positioning frames 220 of the first base 22, and the first magnetic members 271 and the second magnetic members 273 are fixed to the first base 22 by dispensing; placing a plurality of first universal balls 286 in a plurality of second universal ball grooves 2612 of the first carrier 261 respectively, accommodating the second carrier 281 in an accommodating space 2614 of the first carrier 261, enabling the mounting hole 2810 to correspond to the second through hole 2615, and accommodating a part of the plurality of second universal ball grooves 2612 far away from the second support plate 2610 in the third universal ball grooves 2815 to enable a gap to be reserved between the second coil assembly 28 and the second support plate 2610 as well as the first bearing frame 2611; the first connection ring 231 of the first elastic member 23 is fixedly connected to the second positioning slot 2812 of the second carrier 281, and fixed by dispensing, the first positioning plate 2332 of the first elastic member 23 is fixedly connected to the connection block 2616 of the first carrier 261, and the second positioning plates 2336 of the first elastic member 23 are respectively soldered to the connection portions 247 of the cover 24. At this time, the first coil assembly 26 and the second coil assembly 28 conduct the positive and negative terminals on the lid 24 through the first elastic material 23, and the first elastic material 23 is loop-soldered to the first coil 265, the second coil 283, and the third coil 285 to conduct positive and negative currents. The second connection ring 251 of the second elastic member 25 is fixedly connected to the first positioning slot 2601 of the first carrier 261 and fixed by dispensing, the first coil assembly 26 is placed on the top of the first base 22, the third positioning pieces 2532 of the second elastic member 25 are respectively fixedly connected to the positioning blocks 223 of the first base 22, the positioning frames 220 of the first base 22 are respectively inserted into the through slots 2613 of the first carrier 261, the first coil 265 is arranged around the positioning frames 220, the positioning frames 220 are arranged around the second carrier 281, the first carrier 2611 is axially and slidably received in the guide slot 225 of the first base 22, the pair of first magnetic members 271 corresponds to the pair of second coils 283, and the pair of second magnetic members 273 corresponds to the pair of third coils 285. Since each positioning frame 220 is provided with the first through groove 2203, the first magnetic element 271 directly faces the second coil 283, the second magnetic element 273 directly faces the third coil 285, i.e., there is no partition between the first magnetic element 271 and the second coil 283, and there is no partition between the second magnetic element 273 and the third coil 285, thereby increasing the electromagnetic force therebetween; the side plate 242 of the cover 24 is then clamped to the positioning ring 224 of the first base 22. At this time, the second coil assembly 28 is positioned on the first coil assembly 26 in the axial direction by the elastic abutting of the first elastic member 23, that is, the second coil assembly 28 cannot move in the axial direction relative to the first coil assembly 26, but the second coil assembly 28 can move on the plane of XOY relative to the first coil assembly 26; the first coil assembly 26 and the second coil assembly 28 are both axially movably disposed in a space enclosed by the first base 22 and the cover 24, and the first elastic element 23 and the second elastic element 25 are used for driving the first coil assembly 26 and the second coil assembly 28 to return.

Referring to fig. 4-5 and 10-12, fig. 10 is an enlarged perspective view of the second anti-shake mechanism of the second body shown in fig. 4; fig. 11 is a perspective view of the second body anti-shake mechanism of fig. 10 from another perspective; fig. 12 is an exploded perspective view of the coil module of fig. 10. The second base 52 is a hollow plastic frame, and the volume of the second base 52 is smaller than the volume of the accommodating space 228 of the first base 22, so that the second base 52 can be accommodated in the accommodating space 228 and can move in the accommodating space 228. Specifically, a containing hole 520 penetrating through the second base 52 is formed in the middle of the top surface of the second base 52, and the containing hole 520 is used for containing a photosensitive chip, a driving chip, and the like. In the present embodiment, the second base 52 includes a rectangular substrate 521, and the receiving hole 520 is opened on the top surface of the substrate 521 and penetrates through the substrate 521. The second base 52 is provided with a magnetic conductive member 5211 corresponding to the magnetic component 27, and the magnetic conductive member 5211 and the magnetic component 27 are magnetically attracted; in this embodiment, the substrate 521 is provided with a plurality of magnetic conductive members 5211 around the accommodating hole 520, and each magnetic conductive member 5211 is an iron sheet; that is, the base plate 521 is embedded with a plurality of iron sheets around the containing hole 520, and the plurality of iron sheets are magnetically attracted with the first magnetic member 271 and the second magnetic member 273.

The second base 52 is connected to the first base 22 through a plurality of second ball transfer units 56, the plurality of second ball transfer units 56 are arranged along the circumferential direction of the first coil assembly 26, and a space is provided between the second base 52 and the first base 22, so that the second base 52 can move relative to the first base 22 through the second ball transfer units 56. Specifically, the second positioning portions 5213 are disposed around the first coil assembly 26 on the side of the second base 52 facing the first base 22, the second positioning portions 5213 are arranged at least one turn along the circumferential direction of the first coil assembly 26, and the second ball transfer units 56 are respectively disposed in the second positioning portions 5213 in a rolling manner. Specifically, a fourth ball groove 5214 is formed in a side surface of each second positioning portion 5213 facing the first base 22, a depth dimension of the fourth ball groove 5214 is smaller than a radius of the second ball 56, and when the second ball 56 is received in the fourth ball groove 5214, a portion of the second ball 56 extends out of the fourth ball groove 5214 and abuts against the first base 22. In this embodiment, the four corners of the top surface of the substrate 521 are provided with second positioning portions 5213, the second positioning portions 5213 are bumps protruding from the substrate 521, and the fourth universal ball grooves 5214 are formed on the top surface of the bumps.

In this embodiment, the side surface of the second base 52 facing the first base 22 is provided with a plurality of second positioning portions 5213 corresponding to the plurality of first positioning portions 229, and each second positioning portion 5213 is provided with a fourth universal ball groove 5214 corresponding to the first universal ball groove 2290; each first ball transfer groove 2290 and the corresponding fourth ball transfer groove 5214 are provided with a second ball transfer 56, the diameter of the second ball transfer 56 being greater than the sum of the depths of the first ball transfer groove 2290 and the fourth ball transfer groove 5214, thereby providing a space between the first base 22 and the second base 52 for the second base 52 to move relative to the first base 22.

Preferably, a second anti-collision member 523 is provided at a contact portion of the second positioning portion 5213 and the second ball transfer unit 56. In this embodiment, each second anti-collision member 523 is disposed in the fourth universal ball groove 5214 of each second positioning portion 5213, and each second anti-collision member 523 is a hard anti-friction plate disposed in the fourth universal ball groove 5214. Preferably, a hard anti-friction plate is embedded in the inner side surface of the fourth universal ball groove 5214 of the second positioning portion 5213.

The top surface of the substrate 521 is provided with positioning posts 5215 around the receiving holes 520, and the positioning posts 5215 are used for positioning the coil module 54 to the second base 52. Specifically, the positioning posts 5215 are respectively disposed at two opposite corners of the top surface of the base plate 521, which are adjacent to the accommodating hole 520, and the axial extension length of the positioning posts 5215 is not greater than that of the second positioning portion 5213. The outer circumferential wall of the second base 52 is provided with a plurality of striking portions 5216, the striking portions 5216 are made of a flexible material, and the striking portions 5216 prevent the second base 52 from rigidly colliding with the first base 22. In this embodiment, the substrate 521 has two opposite ends of each sidewall provided with striking portions 5216. The bottom surface of the base plate 521 is provided with a plurality of clearance grooves 2517 and a plurality of clearance holes 5218 around the accommodating hole 520, the first clearance groove 2517 is communicated with the accommodating hole 520, and the plurality of clearance holes 5218 are arranged along the circumferential direction of the accommodating hole 520.

The coil module 54 includes at least one pair of fourth coils 5401 corresponding to the pair of first magnetic members 271, that is, the pair of fourth coils 5401 respectively correspond to the pair of first magnetic members 271, and when a current is applied to the pair of fourth coils 5401, an electromagnetic force is generated between the pair of fourth coils 5401 and the pair of first magnetic members 271 so as to drive the second chassis 52 and the coil module 54 to move along a first direction relative to the first chassis 22, and the first direction is perpendicular to the axial direction, that is, the second chassis 52 and the coil module 54 move along the Y-axis. When the direction of the current input into the pair of fourth coils 5401 is changed, the second chassis 52 can be driven to change the moving direction by the electromagnetic force generated between the pair of fourth coils 5401 and the pair of first magnetic members 271.

In this embodiment, the coil module 54 includes two pairs of fourth coils 5401 corresponding to the pair of first magnetic members 271, that is, the two pairs of fourth coils 5401 correspond to the pair of first magnetic members 271, respectively; when currents with different magnitudes are conducted in the two pairs of fourth coils 5401, electromagnetic forces with different magnitudes are respectively generated between the two pairs of fourth coils 5401 and the pair of first magnetic elements 271, so that the fourth coils 5401 and the first magnetic elements 271 generate different driving forces to form torques, so as to drive the second base 52 and the coil module 54 to rotate relative to the first base 22 along an axis parallel to the axial direction. When currents with the same magnitude are conducted in the two pairs of fourth coils 5401, electromagnetic forces are generated between the two pairs of fourth coils 5401 and the pair of first magnetic members 271 so as to drive the second base 52 and the coil module 54 to move relative to the first base 22 along a direction perpendicular to the axial direction, that is, along the Y axis; when the direction of the current inputted into the two fourth coils 5401 is changed, the electromagnetic force generated between the two pairs of fourth coils 5401 and the pair of first magnetic members 271 can drive the second chassis 52 to change the moving direction.

Preferably, the coil module 54 further includes at least one pair of fifth coils 5403 corresponding to the pair of second magnetic members 273, that is, the pair of fifth coils 5403 respectively correspond to the pair of second magnetic members 273, and when a current is applied to the pair of fifth coils 5403, an electromagnetic force is generated between the pair of fifth coils 5403 and the pair of second magnetic members 273 so as to drive the second chassis 52 and the coil module 54 to move along the second direction relative to the first chassis 22, and the second direction is perpendicular to the axial direction and the first direction, that is, the second chassis 52 and the coil module 54 move along the X axis. When the direction of the current input into the pair of fifth coils 5403 is changed, the electromagnetic force generated between the pair of first coils 5403 and the pair of second magnetic members 273 can drive the second base 52 to change the moving direction.

In this embodiment, the coil module 54 includes two pairs of fifth coils 5403 corresponding to the pair of second magnetic members 273, that is, the two pairs of fifth coils 5403 respectively correspond to the pair of second magnetic members 273; when currents with different magnitudes are conducted in the two pairs of fifth coils 5403, electromagnetic forces with different magnitudes are respectively generated between the two pairs of fifth coils 5403 and the pair of second magnetic members 273, and the two pairs of fifth coils 5403 and the pair of second magnetic members 273 generate different driving forces to form moments so as to drive the second base 52 and the coil module 54 to rotate along an axis parallel to the axial direction relative to the first base 22. When currents with the same magnitude are conducted in the two pairs of fifth coils 5403, electromagnetic forces are generated between the two pairs of fifth coils 5403 and the pair of second magnetic members 273, so as to drive the second chassis 52 and the coil module 54 to move relative to the first chassis 22 along a direction perpendicular to the axial direction, that is, along the X axis; when the direction of the current inputted into the two fifth coils 5403 is changed, the electromagnetic force generated between the two pairs of fifth coils 5403 and the pair of second magnetic members 273 can drive the second base 52 to change the moving direction.

As shown in fig. 12, in the present embodiment, the coil module 54 includes a pair of clamping plates 542, and two pairs of fourth coils 5401 and two pairs of fifth coils 5403 sandwiched between the pair of clamping plates 542, and the two pairs of fourth coils 5401 and the two pairs of fifth coils 5403 form a rectangle. A through hole 5421 is formed in the middle of each clamping plate 542, and two pairs of fourth coils 5401 and two pairs of fifth coils 5403 are arranged around the through hole 5421. The outer periphery of each clamping plate 542 is provided with a plurality of positioning openings 5423, and the positioning openings 5423 are used for positioning the coil module 54 on the second base 52. Preferably, each clamping plate 542 is provided with at least one pair of positioning holes 5425 around the through hole 5421. Specifically, each clamping plate 542 is a rectangular plate, positioning holes 5423 are respectively formed in four corners of the rectangular plate, two pairs of fourth coils 5401 are located on two opposite sides of the rectangular plate, and two pairs of fifth coils 5403 are located on the other opposite sides of the rectangular plate.

When the fourth coil 5401 and/or the fifth coil 5403 are energized, electromagnetic forces with different magnitudes are generated between the two pairs of fourth coils 5401 and the pair of first magnetic members 271 and/or between the two pairs of fifth coils 5403 and the pair of second magnetic members 273 to drive the second base 52 and the coil mold 54 to rotate relative to the first base 22 along an axis parallel to the axial direction. That is, the electromagnetic force generated between the fourth coil 5401 and the fifth coil 5403 and the first magnetic member 271 and the second magnetic member 273 is used to drive the second base 52 and the coil module 54 to move in the direction perpendicular to the axial direction and/or rotate along the axis parallel to the axial direction, that is, move on the XOY plane and/or rotate along the axis parallel to the Z axis.

The second OIS anti-shake mechanism further includes a flexible circuit board 55 connected to the coil module 54, and the flexible circuit board 55 is provided with a third magnetic induction driving element 551 corresponding to the first magnetic member 271 and a fourth magnetic induction driving element 553 corresponding to the second magnetic member 273. In this embodiment, the flexible circuit board 55 is provided with two spaced third magnetic induction driving elements 551 corresponding to the first magnetic member 271, and when the photosensitive chip attached to the second base 52 operates, the magnetic induction driving elements 551 operate with the magnetic flux variation generated by the first magnetic member 271, so as to control the second base 52 to move along the Y axis and rotate along the axis parallel to the Z axis; two fourth magnetic induction driving elements 553 are disposed on the flexible circuit board 55 corresponding to the second magnetic member 273, and when the photosensitive chip attached to the second base 52 is activated, the magnetic induction driving elements and the magnetic flux variation generated by the second magnetic member 273 are operated, so as to control the second base 52 to move along the X-axis and rotate along the axis parallel to the Z-axis. A through hole 554 is formed in the middle of the flexible circuit board 55, a plurality of positioning holes 555 are formed around the flexible circuit board 55, and the positioning holes 555 are used for positioning the flexible circuit board 55 on the second base 52. The flexible circuit board 55 is provided with two opposite positioning holes 556 around the through hole 554. One side of the flexible circuit board 55 is provided with a connection pin 557. Specifically, the flexible circuit board 55 is a rectangular plate, the four corners of the rectangular plate are respectively provided with a positioning opening 555, and the two third magnetic induction driving elements 551 and the two fourth magnetic induction driving elements 553 are respectively located at two adjacent sides of the rectangular plate.

Referring to fig. 4-5 and 13, fig. 13 is an enlarged perspective view of the circuit board module 70 in fig. 4. The vcm 100 further includes a circuit board module 70 disposed on a side of the second base 52 away from the first base 22, wherein the circuit board module 70 is electrically connected to the first coil assembly 26, the second coil assembly 28, and the coil module 54. Specifically, the circuit board module 70 is electrically connected to the first coil assembly 26 and the second coil assembly 28 through the metal wires 248 of the cover 24, and the circuit board module 70 is electrically connected to the coil module 54 through the flexible circuit board 55. The circuit board module 70 is provided with electronic devices such as the photosensitive chip 720, and the circuit board module 70 is fixedly connected to the second base 52 and moves relative to the first base 22 along with the second base 52, so as to drive the displacement of the photosensitive chip 720 to perform anti-shake compensation.

In this embodiment, the circuit board module 70 includes a bottom plate 72 corresponding to the bottom surface of the second base 52, a conductive member 73 connected to the bottom plate 72 and surrounding the bottom plate 72, and an extension plate 76 connected to the conductive member 73, wherein the bottom plate 72 is electrically connected to the coil module 54, the conductive member 73 is electrically connected to the first coil assembly 26 and the second coil assembly 28, the extension plate 76 is used for electrically connecting an external connector, and a space-avoiding groove 735 is disposed between a part of the conductive member 73 and the bottom plate 72. Specifically, the conductive member 73 includes two flexible side plates 731 connected to the bottom plate 72 and surrounding the two opposite sides of the first base 22, and a connecting plate 75 connected between the two flexible side plates 731, the bottom plate 72 is fixedly connected to the bottom surface of the second base 52, and the photosensitive chip 720 is located on the top surface of the bottom plate 72; when the bottom plate 72 is connected to the second base 52, the photosensitive chip 720 faces the receiving hole 520 of the second base 52. In this embodiment, the bottom plate 72 is a rectangular flexible circuit board, a first connection portion 722 is protruded outwardly from a middle portion of one side of the bottom plate 72, and the first connection portion 722 is used for electrically connecting to the connection pins 557 of the flexible circuit board 55; preferably, the first connection portion 722 and the connection pin 557 are connected by solder. In other embodiments, the bottom plate 72 may also be a circular circuit board, a polygonal circuit board, an oval circuit board, or the like; the bottom plate 72 may also be a PCB of various shapes.

One end of each of the two flexible side plates 731 is connected to the side of the bottom plate 72 where the first connection portion 722 is located, the other end of each of the two flexible side plates 731 extends along the edge of the bottom plate 72 and then is connected through the connection plate 75, and the connection plate 75 is located on the side of the bottom plate 72 facing the first connection portion 722; the bottom plate 72 and the two flexible side plates 731 enclose a space 77, and the first base 22 is accommodated in the space 77. Specifically, each flexible side plate 731 is U-shaped, one end of each of the two flexible side plates 731 is connected to the bottom plate 72 through a bent portion 732, and the two bent portions 732 are located at two ends opposite to the first connection portion 722; the other end of each flexible side plate 731 away from the first connection portion 722 is connected by a connection plate 75. A second connecting portion 752 electrically connected to the first coil assembly 26 and the second coil assembly 28 is disposed on a side of the connecting plate 75 away from the bottom plate 72; specifically, the second connecting portion 752 is electrically connected to the metal wire 248 of the cover 24; preferably, the second connection portion 752 is connected to the metal wire 248 by solder. The extension plate 76 is connected to the side of the connection plate 75 away from the second connection portion 752. A retaining groove 735 is provided between each flexible side plate 731 and the bottom plate 72, and the retaining groove 735 is used for passing around the bottom of the first base 22 to connect to an external structure. By providing the avoiding groove 735, the portion of the conductive member 73 connected to the bottom plate 72 can be reduced, thereby reducing the obstruction of the conductive member 73 to the movement of the bottom plate 72 when the second base 52 moves. The flexible side plate 731, the connecting plate 75 and the extending plate 76 are all flexible circuit boards.

Referring to fig. 1-5 and 8-16, fig. 14 is a perspective cross-sectional view of the voice coil motor 100 shown in fig. 1; fig. 15 is a perspective cross-sectional view of another perspective of the voice coil motor 100 of fig. 1; attaching the flexible circuit board 55 to the bottom surface of the coil module 54, so that the flexible circuit board 55 is connected and conducted with the fourth coil 5401 and the fifth coil 5403 in the coil module 54 through soldering, the through hole 554 of the flexible circuit board 55 is opposite to the through hole 5421 of the coil module 54, the positioning holes 555 of the flexible circuit board 55 are opposite to the positioning holes 5423 of the coil module 54, and the two positioning holes 556 of the flexible circuit board 55 are opposite to the two positioning holes 5425 of the coil module 54; placing one side of the flexible circuit board 55, which is far away from the coil module 54, on the top of the second base 52, so that the second positioning portions 5213 of the second base 52 are respectively clamped into the positioning openings 555, 5423, which correspond to the flexible circuit board 55 and the coil module 54, respectively, and the two positioning posts 5215 of the second base 52 are respectively inserted into the two positioning holes 556, 5425 of the flexible circuit board 55 and the coil module 54, and the flexible circuit board 55 and the coil module 54 are fixed to the second base 52 by dispensing, and the third magnetic induction driving element 551 and the fourth magnetic induction driving element 553 of the flexible circuit board 55 are respectively accommodated in the clearance holes 5218 of the second base 52; connecting the circuit board module 70 to the bottom of the second base 52, specifically, clamping the bottom plate 72 in the clearance groove 2517 of the second base 52 and dispensing and fixing, so that the second base 52 is accommodated in the clearance space 77 of the circuit board module 70, and the first connecting portion 722 is connected to the connecting pins 557 by soldering; positioning a plurality of second anti-collision members 523 in a plurality of fourth ball grooves 5214 of the second base 52, respectively, placing a plurality of second ball transfer units 56 in a plurality of fourth ball grooves 5214 of the second base 52, respectively, wherein each second ball transfer unit 56 partially exposes a corresponding fourth ball groove 5214; the second base 52 is accommodated in the accommodating space 228 of the first base 22, so that the magnetic conductive member 5211 of the second base 52 is magnetically attracted to the first magnetic member 271 and the second magnetic member 273, and the plurality of second ball transfer units 56 on the second base 52 can be respectively and rollably abutted against the plurality of first ball transfer units 2290 of the first base 22, thereby preventing the second ball transfer units 56 from hitting the first base 22 and the second base 52 out of the pit, which results in abnormal characteristics. The first base 22 is accommodated in the space 77 of the circuit board module 70, and the second connecting portion 752 is soldered to the metal wires 248 of the cover 24. At this time, the second base 52 has a gap with the first base 22 and is connected by the second ball transfer unit 56, so that the second base 52 is limited in the degree of freedom in the Z direction with respect to the first base 22, and the second base 52 can only slide along the XOY plane and/or rotate along the axis parallel to the Z axis in the accommodating space 228 with respect to the first base 22; the striking part 5216 of the second base 52 stops against the inner side surface of the limit ring 227 to limit the second ball transfer unit 56 to separate the second base 52 from the first base 22, so that the friction between the second base 52 and the first base 22 can be reduced; the second base 52 moves in the space enclosed by the limiting ring 227.

When the first coil 265 is energized, an electromagnetic force is generated between the first coil 265 on the first coil assembly 26 and the magnetic assembly 27 on the first base 22, the electromagnetic force pushes the first coil assembly 26 to move along the axial direction, and the first coil assembly 26 drives the second coil assembly 28 to move along the axial direction, that is, the electromagnetic force pushes the first coil assembly 26 and the second coil assembly 28 to move up and down together along the axial direction in a space enclosed by the first base 22 and the cover 24, so that the lens attached to the second carrier 281 realizes an auto-focusing function; in the process of moving the first coil assembly 26 and the second coil assembly 28 together, the second connecting bar 2335 of the first elastic member 23 and the third connecting bar 2531 of the second elastic member 25 are elastically deformed, and the second connecting bar 2335 of the first elastic member 23 and the third connecting bar 2531 of the second elastic member 25 can recover to be deformed after the electromagnetic force disappears to drive the first coil assembly 26 and the second coil assembly 28 to return to the original position together.

When the second coil assembly 28 is energized, electromagnetic force is generated between the second coil 283 and the third coil 285 and the magnetic assembly 27 on the first base 22, and the electromagnetic force pushes the second carrier 281 to move relative to the first carrier 261, so that the lens attached to the second carrier 281 moves along the XOY plane and/or rotates axially relative to the photosensitive chip 720 on the second base 52 in the space surrounded by the four positioning frames 220 of the first base 22 to counteract lens shake, thereby implementing the first OIS anti-shake function. During the movement of the second carrier 281 relative to the second carrier 261, the first connecting bar 2331 of the first elastic component 23 is elastically deformed along the XOY plane, and the first connecting bar 2331 can recover to be deformed after the electromagnetic force disappears to drive the second coil assembly 28 to reset. A plurality of first universal balls 286 are respectively held between the second carrier 281 and the first carrier 261 in a rolling manner. The first magnetic induction driving element 295 is matched with the first magnetic element 271, and the second magnetic induction driving element 296 is matched with the second magnetic element 273, so as to feed back the actual movement track of the second carrier 281 relative to the first base 22, thereby adjusting the current magnitude and/or current direction of the second coil 283 and/or the third coil 285, so that the movement track of the second carrier 281 is more accurate, the movement track of the lens attached to the second carrier 281 is more accurate, and the anti-shake effect is better. Namely, the first magnetic induction driving element 295 and the second magnetic induction driving element 296 are configured to operate with the magnetic flux variation generated by the first magnetic element 271 and the second magnetic element 273 when the lens attached to the second carrier 281 is actuated, so as to simultaneously control the first OIS anti-shake mechanism to move on the XOY plane and rotate along the axis parallel to the Z axis.

When the coil module 54 is energized, electromagnetic force is generated between the fourth coil 5401 and the fifth coil 5403 and the magnetic assembly 27 on the cover 24, and the electromagnetic force pushes the second chassis 52 and the coil module 54 to move relative to the first chassis 22, so that the photo sensor chip 720 positioned on the second chassis 52 moves along the XOY plane and/or rotates axially in the accommodating space 228 of the first chassis 22 along with the second chassis 52 to counteract lens shake, thereby implementing the second OIS anti-shake function. In the process of moving the second base 52 relative to the first base 22, the magnetic conductive member 5211 and the magnetic assembly 27 of the second base 52 are kept magnetically attracted, and the plurality of second ball transfer units 56 are respectively held between the first base 22 and the second base 52 in a rolling manner. The third magnetic induction driving element 551 is matched with the first magnetic part 271, and the fourth magnetic induction driving element 553 is matched with the second magnetic part 273, so as to feed back the actual motion track of the second base 52 relative to the first base 22, and adjust the current magnitude and/or the current direction of the fourth coil 5401 and/or the fifth coil 5403, so that the motion track of the second base 52 is more accurate, the motion track of the photosensitive chip 720 attached to the second base 52 is more accurate, and the anti-shake effect is better. That is, the third magnetic induction driving element 551 and the fourth magnetic induction driving element 553 are used for performing operations with the magnetic flux variation generated by the first magnetic member 271 and the second magnetic member 273 when the photosensitive chip 720 attached to the second base 52 is activated, so as to simultaneously control the second base 52 and the circuit board module 70 to move on the XOY plane and rotate along the axis parallel to the Z axis. Since the first base 22 and the bottom plate 72 fixed to the second base 52 are connected by the flexible side plate 731 and the connecting plate 75, the reaction force is small, and the movement return of the second base 52 and the bottom plate 72 is facilitated.

The second base 52 is connected with the first base 22 at intervals through magnetic force, and a second universal ball 56 is arranged between the second base 52 and the first base 22, so that low friction between the second base 52 and the first base 22 is realized; because the second base 52 and the magnetic component 27 are always kept in a magnetic attraction state, the connection between the second base 52 and the first base 22 is more stable.

The first coil assembly 26 and the second coil assembly 28 of the voice coil motor 100 of the present invention are connected between the first base 22 and the cover 24 through the first elastic member 23 and the second elastic member 25, and the first coil assembly 26 generates electromagnetic force through the cooperation of the first coil 265 and the magnetic assembly 27, so as to drive the coil assembly 26 to move along the axial direction, thereby implementing an auto-focusing function; the second coil assembly 28 is connected to the first coil assembly 26 through a plurality of first universal balls 286, and the second coil assembly 28 generates electromagnetic force through the cooperation of the second coil 283 and the third coil 285 with the magnetic assembly 27, so as to drive the second coil assembly 28 to move relative to the first base 22, thereby driving the second coil assembly 28 attached with the lens to move, and realizing the first OIS anti-shake; the second base 52 is connected to a side of the first base 22 far from the cover 24 through a plurality of second ball transfer units 56, and the second base 52 generates electromagnetic force through the cooperation of the coil module 54 and the magnetic assembly 27 to drive the second base 52 to move relative to the first base 22, so as to drive the bottom plate 72 attached with the photo sensor chip 720 to move, thereby implementing the second OIS anti-shake. The anti-shake performance of the voice coil motor 100 is improved, the number of parts is reduced, the manufacturing cost is reduced, and the axial size of the voice coil motor 100 can be reduced, so that the internal space of the electronic device occupied by the voice coil motor 100 is reduced, and the layout of other electronic devices of the electronic device is facilitated.

Referring to fig. 16 and 17, fig. 17 is a schematic perspective view of a camera according to an embodiment of the present invention. The camera comprises the voice coil motor 100, the lens module 300 and the photosensitive chip 720 arranged on the voice coil motor 100, the lens module 300 is connected in the second coil component 28 of the voice coil motor 100, and the voice coil motor 100 drives the first coil component 26 and the second coil component 28 to move so as to drive the lens module 300 to move; the vcm 100 drives the sensor chip 720 to move relative to the lens module 300. Specifically, the rear end of the lens module 300 passes through the through hole 244 of the cover 24 to be connected to the mounting hole 2810 of the second carrier 281, and the front end of the lens module 300 passes through the through hole 244 of the cover 24 to be exposed. When the camera is used, the first coil assembly 26 is powered on to generate electromagnetic force with the magnetic assembly 27, and the electromagnetic force drives the first coil assembly 26 to move along the axial direction so as to drive the lens module 300 to move together with the first coil assembly 26 and the second coil assembly 28, so as to realize the automatic focusing function; the second coil component 28 is electrified to generate electromagnetic force with the magnetic component 27, and the electromagnetic force drives the second coil component 28 and the lens module 300 to move along the XOY plane and/or axially rotate so as to realize the first OIS anti-shake function; the coil module 54 is energized to generate an electromagnetic force with the magnetic assembly 27, and the electromagnetic force drives the second base 52 and the coil module 54, the flexible circuit board 55 and the bottom plate 72 connected to the second base 52 to move along the XOY plane and/or axially rotate, so as to drive the photosensitive chip 720 attached to the bottom plate 72 to move along the XOY plane and/or axially rotate to counteract lens shake, thereby implementing an OIS anti-shake function.

Referring to fig. 18, fig. 18 is a schematic perspective view of an electronic device according to an embodiment of the invention. The electronic device comprises a housing 500, a main board 600 arranged in the housing 500, a display screen 700 arranged on the top surface of the housing 500 and a camera, wherein the camera is arranged in the housing 500, and the camera and the display screen 700 are respectively electrically connected to the main board 600. In this embodiment, the electronic device is a mobile phone, and the lens module 300 is a front lens of the mobile phone. In other embodiments, the lens module 300 may be a rear lens.

In other embodiments, the electronic device may also be, but is not limited to, any electronic device that requires a lens, such as a tablet computer, a display screen, a smart television, an electronic watch, and a smart band.

The foregoing is illustrative of embodiments of the present invention, and it should be noted that modifications and embellishments may be made by those skilled in the art without departing from the principle of the embodiments of the present invention, and these modifications and embellishments are also considered to be within the scope of the present invention.

Claims

1. A voice coil motor is characterized by comprising a first base, a cover body covering the first base, a first coil assembly arranged between the first base and the cover body, a second coil assembly accommodated in an inner cavity of the first coil assembly, and a magnetic assembly arranged on the first base and positioned between the first coil assembly and the second coil assembly; after the first coil assembly is electrified, electromagnetic force is generated between the first coil assembly and the magnetic assembly so as to drive the first coil assembly and the second coil assembly to move together along the axial direction; electromagnetic force is generated between the second coil assembly and the magnetic assembly after the second coil assembly is electrified so as to drive the second coil assembly to move relative to the first coil assembly.

2. The voice coil motor of claim 1, wherein an electromagnetic force between the second coil module and the magnetic assembly is configured to drive the second coil assembly to move relative to the first coil assembly in a plane perpendicular to an axial direction.

3. The voice coil motor of claim 1, wherein a first through hole is axially formed in a middle portion of the first base, and a plurality of positioning frames are disposed around the first through hole at a top portion of the first base; the magnetic assembly comprises magnetic pieces which are respectively positioned on the positioning frames, the first coil assembly comprises a first carrier and a first coil which is arranged around the first carrier, the first carrier is slidably sleeved on the positioning frames, and the second coil assembly is accommodated in an accommodating space which is formed by the positioning frames.

4. The voice coil motor of claim 3, wherein the first base comprises a first supporting plate, the first through hole is formed in a middle portion of the first supporting plate, the plurality of positioning frames are protruded from a top surface of the first supporting plate, and each positioning frame is provided with a positioning cavity for positioning a magnetic member.

5. The VCM of claim 4, wherein the positioning cavity of each positioning frame extends through a side of the positioning frame facing the first through hole and/or the positioning cavity of each positioning frame extends through the first support plate.

6. The voice coil motor of claim 3, wherein the first carrier comprises a second support plate and a first frame surrounding the second support plate, and the first coil is wound around the first frame; the second supporting plate is provided with a plurality of through grooves corresponding to the positioning frames, and the plurality of positioning frames are respectively inserted into the plurality of through grooves, so that the first bearing frame is arranged around the plurality of positioning frames.

7. The voice coil motor of claim 6, wherein the second coil assembly is supported on a top surface of the second support plate, the positioning frames are disposed around the second coil assembly, and a plurality of first universal balls are disposed between the second support plate and the second coil assembly.

8. The vcm according to claim 7, wherein the second coil assembly comprises a second carrier and at least one pair of second coils disposed on the second carrier, wherein a current is passed through the at least one pair of second coils, and an electromagnetic force is generated between the at least one pair of second coils and the magnetic member to drive the second coil assembly to move in a first direction relative to the first base, and the first direction is perpendicular to an axial direction.

9. The voice coil motor of claim 8, wherein the second coil assembly further comprises at least one pair of third coils disposed on the second carrier, wherein a current is passed through the at least one pair of third coils, and an electromagnetic force is generated between the at least one pair of third coils and the magnetic member to drive the second coil assembly to move relative to the first base in a second direction, and the second direction is perpendicular to the first direction and the axial direction.

10. A voice coil motor as claimed in claim 9, wherein the number of the second coils and/or the third coils is at least two pairs, and after the at least two pairs of the second coils and/or the at least two pairs of the third coils are energized, electromagnetic forces of different magnitudes are generated between the two pairs of the second coils and the magnetic assembly and/or between the two pairs of the third coils and the magnetic assembly to drive the second coil assembly to rotate relative to the first base along an axis parallel to an axial direction.

11. The vcm according to claim 1, further comprising a first elastic member and a second elastic member, wherein the first elastic member is connected to the cover, the first coil assembly and the second coil assembly, and the first elastic member has a predetermined elastic force for pushing the second coil assembly to move closer to the first coil assembly; the second elastic piece is connected to the first base and the first coil assembly, and the first elastic piece and the second elastic piece are used for moving and resetting the first coil assembly and the second coil assembly.

12. The vcm according to claim 1, further comprising a second base disposed on a side of the first base opposite to the cover, and a coil module located on the second base, wherein electromagnetic force is generated between the coil module and the magnetic assembly after the coil module is powered on, so as to drive the second base and the coil module to move relative to the first base.

13. The vcm of claim 12, wherein the coil module comprises at least a pair of fourth coils, wherein current is passed through the at least a pair of fourth coils, and electromagnetic force is generated between the at least a pair of fourth coils and the magnetic assembly to drive the second base and the coil module to move relative to the first base along a first direction, the first direction being perpendicular to the axial direction.

14. The vcm of claim 13, wherein the coil module comprises at least one pair of fifth coils, wherein current is passed through the at least one pair of fifth coils, and wherein electromagnetic force is generated between the at least one pair of fifth coils and the magnetic assembly to drive the second base and the coil module to move relative to the first base in a second direction, the first direction being perpendicular to the first direction and the axial direction.

15. The voice coil motor of claim 12, wherein the second base is coupled to the first base by a plurality of second ball transfer units, the second base being spaced apart from the first base.

16. A camera head, comprising a voice coil motor according to any one of claims 1 to 15, a lens module and a photo sensor chip disposed on the voice coil motor, wherein the lens module is connected to the second coil component of the voice coil motor, and the voice coil motor drives the first coil component to move so as to drive the lens module to move along with the second coil component along an axial direction; the voice coil motor drives the second coil assembly to move so as to drive the lens module to move along a plane perpendicular to the axial direction, and the voice coil motor drives the photosensitive chip to move relative to the lens module.

17. An electronic device, comprising a housing, a motherboard disposed in the housing, and the camera of claim 16, wherein the camera is disposed in the housing, and the camera is electrically connected to the motherboard.