阅读说明：本技术 一种高频音圈电机 (High-frequency voice coil motor ) 是由 王书华 刘步军 王建云 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种高频音圈电机,包括外壳、安装于外壳的定子组件、安装于外壳的动子组件以及连接于外壳的弹性件；动子组件包括线架、安装于线架上的线圈以及连接于线架的输出轴,输出轴远离线架的一端与弹性件连接,弹性件用于输出轴稳定移动。线圈通电之后,线架与定子组件产生相对的移动,线架往复移动于外壳,在线架的带动下,输出轴往复移动于外壳,利用弹性件自身具有的柔性以及弹性使得输出轴在往复移动的过程中,弹性件吸收输出轴的振动,同时使得输出轴沿着其轴线方向稳定移动,以便于阻止输出轴产生抖动或者晃动,弥补线架与定子组件之间产生径向摆动而致使输出轴不沿轴向方向移动的缺陷,从而提升该音圈电机使用的稳定性。(The invention discloses a high-frequency voice coil motor which comprises a shell, a stator assembly arranged on the shell, a rotor assembly arranged on the shell and an elastic piece connected to the shell, wherein the stator assembly is arranged on the shell; the rotor assembly comprises a wire frame, a coil arranged on the wire frame and an output shaft connected to the wire frame, one end, far away from the wire frame, of the output shaft is connected with an elastic piece, and the elastic piece is used for enabling the output shaft to stably move. After the coil is powered on, the bobbin and the stator assembly move relatively, the bobbin reciprocates in the shell, the output shaft reciprocates in the shell under the driving of the bobbin, the output shaft can absorb the vibration of the output shaft in the reciprocating movement process by utilizing the flexibility and elasticity of the elastic piece, and meanwhile, the output shaft can stably move along the axial direction of the output shaft, so that the output shaft is prevented from shaking or shaking, the defect that the output shaft does not move along the axial direction due to the radial swing generated between the bobbin and the stator assembly is overcome, and the use stability of the voice coil motor is improved.)

1. A high frequency voice coil motor, characterized by: the magnetic force sensor comprises a shell (1), a stator assembly (2) arranged on the shell (1), a rotor assembly (3) arranged on the shell (1) and an elastic part (4) connected to the shell (1), wherein the rotor assembly (3) and the stator assembly (2) move relatively; the mover assembly (3) comprises a wire frame (31), a coil (32) arranged on the wire frame (31) and an output shaft (33) connected to the wire frame (31), one end, far away from the wire frame (31), of the output shaft (33) is connected with the elastic piece (4), and the elastic piece (4) is used for enabling the output shaft (33) to stably move.

2. A high frequency voice coil motor as claimed in claim 1, wherein: the stator assembly comprises a shell (1) and a stator assembly, wherein the shell (1) comprises an installation cylinder (11) for accommodating the rotor assembly (3) and the coil holder (31) and a first pressure ring (12) connected to the installation cylinder (11), the coil holder (31) is cylindrical, and the stator assembly (2) is arranged in the coil holder (31); elastic component (4) include first shell fragment (41), first shell fragment (41) install in first clamping ring (12) are kept away from the one end of installation section of thick bamboo (11), output shaft (33) are coaxial to be passed first clamping ring (12), just output shaft (33) link in first shell fragment (41).

3. A high frequency voice coil motor as claimed in claim 2, wherein: the shell (1) further comprises a second pressing ring (13) coaxially connected to the first pressing ring (12), and the first elastic sheet (41) is arranged between the first pressing ring (12) and the second pressing ring (13); elastic component (4) still include second shell fragment (42), second shell fragment (42) install in second clamping ring (13) are kept away from the one end of first clamping ring (12), output shaft (33) connect in second shell fragment (42).

4. A high frequency voice coil motor as claimed in claim 3, wherein: the first elastic piece (41) is provided with a first righting portion (51) used for stable movement of the output shaft (33), the second elastic piece (42) is provided with a second righting portion (52) used for stable movement of the output shaft (33), and the first righting portion (51) and the second righting portion (52) are both connected with the output shaft (33).

5. A high frequency voice coil motor as claimed in claim 4, wherein: the first elastic sheet (41) and the second elastic sheet (42) are both provided with a deformation groove (53), and the deformation groove (53) surrounds the first righting part (51) and the second righting part (52).

6. A high frequency voice coil motor as claimed in claim 5, wherein: the output shaft (33) comprises a first shaft (331) fixed on the wire frame (31), a second shaft (332) detachably connected to the first shaft (331), and a third shaft (333) detachably connected to the second shaft (332), the first centering portion (51) is installed between the first shaft (331) and the second shaft (332), and the second centering portion (52) is installed between the second shaft (332) and the third shaft (333).

7. A high frequency voice coil motor as claimed in claim 3, wherein: the first pressing ring (12) is provided with a first limiting groove (121) used for limiting the position of the first elastic sheet (41), and the second pressing ring (13) is provided with a second limiting groove (131) used for limiting the position of the second elastic sheet (42).

8. A high frequency voice coil motor as claimed in claim 2, wherein: the coil holder (31) is provided with a caulking groove (312) for embedding the coil (32), and the caulking groove (312) is positioned at one end, far away from the output shaft (33), of the coil holder (31).

9. A high frequency voice coil motor as claimed in claim 7, wherein: the stator assembly (2) comprises a first magnet (21), a second magnet (22) and a magnetic yoke (23), the first magnet (21) is fixed on the mounting cylinder (11), the second magnet (22) is connected to the first magnet (21), the magnetic yoke (23) is provided with two parts, one of the magnetic yoke (23) is mounted between the first magnet (21) and the second magnet (22), and the other part is fixed at one end, far away from the first magnet (21), of the second magnet (22).

10. A method of mounting a high frequency voice coil motor, using a high frequency voice coil motor as claimed in any one of claims 1 to 9, comprising the steps of:

firstly, the stator assembly (2) is installed in the installation cylinder (11);

secondly, winding the coil (32) on the bobbin (31) firstly, then installing the bobbin (31) in the installation cylinder (11), and sleeving the stator assembly (2) by the bobbin (31);

thirdly, the first pressing ring (12) is arranged at one end, close to the opening of the installation cylinder (11), of the installation cylinder, and the first elastic sheet (41) is arranged on the first pressing ring (12);

fourthly, the second shaft (332) is installed on the first shaft (331), and the first elastic sheet (41) is clamped by the first shaft (331) and the second shaft (332);

fifthly, the second pressing ring (13) is arranged on the first pressing ring (12), the first elastic sheet (41) is clamped by the first pressing ring (12) and the second pressing ring (13), and then the second elastic sheet (42) is arranged on the second pressing ring (13);

sixthly, the third shaft (333) penetrates through the second elastic sheet (42) to be connected with the second shaft (332), and the second shaft (332) and the third shaft (333) clamp the second elastic sheet (42) to finish installation.

Technical Field

The utility model belongs to the technical field of voice coil motor and specifically relates to a high frequency voice coil motor is related to.

Background

The voice coil motor is a direct drive motor in a special form, has the characteristics of simple structure, small volume, high acceleration, quick response and the like, can generate linear motion, does not need intermediate transmission mechanisms such as a belt, a gear and the like in a drive system, greatly reduces energy loss, saves cost, and greatly improves the response speed and the control precision of the system.

At present, a voice coil motor is widely applied to a linear motion platform consisting of a linear guide rail and related mechanical accessories. In the in-service use process, under the effect of coil, produce the relative movement along the coil axis direction between the installation body of fixed coil and the magnet, the installation body can produce radial swing, and the installation body can produce radial swing and can cause voice coil motor's output to move unstably, also the phenomenon that the voice coil motor output can produce the shake or rock, has the relatively poor problem of voice coil motor stability in use.

Disclosure of Invention

In order to improve the not good problem of voice coil motor stability in use, this application provides a high frequency voice coil motor.

The application provides a high frequency voice coil motor adopts following technical scheme:

a high-frequency voice coil motor comprises a shell, a stator assembly arranged on the shell, a rotor assembly arranged on the shell and an elastic piece connected to the shell, wherein the rotor assembly and the stator assembly move relatively; the mover assembly comprises a wire frame, a coil arranged on the wire frame and an output shaft connected to the wire frame, one end, far away from the wire frame, of the output shaft is connected with the elastic piece, and the elastic piece is used for enabling the output shaft to stably move.

By adopting the technical scheme, after the coil is powered on, the bobbin and the stator assembly move relatively, the bobbin reciprocates in the shell, the output shaft reciprocates in the shell under the driving of the bobbin, the output shaft can move in the reciprocating mode by utilizing the flexibility and elasticity of the elastic piece, the elastic piece absorbs the vibration of the output shaft, and meanwhile, the output shaft can stably move along the axis direction of the output shaft, so that the output shaft is prevented from shaking or shaking, the defect that the output shaft does not move along the axial direction due to the fact that radial swing is generated between the bobbin and the stator assembly is overcome, and the use stability of the voice coil motor is improved.

Optionally, the housing includes an installation cylinder for accommodating and installing the mover assembly and the bobbin, and a first compression ring connected to the installation cylinder, the bobbin is cylindrical, and the stator assembly is disposed in the bobbin; the elastic piece comprises a first elastic piece, the first elastic piece is installed at one end, away from the installation cylinder, of the first pressing ring, the output shaft coaxially penetrates through the first pressing ring, and the output shaft is connected to the first elastic piece.

Through adopting above-mentioned technical scheme, utilize first shell fragment to make the output shaft can be along self axis direction reciprocating motion, make the reciprocating motion that the output shaft can be stable, and then improve the stability that the output shaft removed, prevent that the output shaft from producing the phenomenon of shake or rocking, promote this voice coil motor's stability.

Optionally, the housing further includes a second press ring coaxially connected to the first press ring, and the first elastic sheet is disposed between the first press ring and the second press ring; the elastic piece further comprises a second elastic sheet, the second elastic sheet is installed at one end, away from the first pressing ring, of the second pressing ring, and the output shaft is connected with the second elastic sheet.

Through adopting above-mentioned technical scheme, further inject the reciprocating motion of output shaft through the second shell fragment, utilize the elasticity of the self of second shell fragment to prevent that the output shaft from producing the shake or rocking for the output shaft can be more stable remove, and then promote the stability that the output shaft removed.

Optionally, the first elastic piece is provided with a first righting portion used for the output shaft to move stably, the second elastic piece is provided with a second righting portion used for the output shaft to move stably, and the first righting portion and the second righting portion are both connected with the output shaft.

By adopting the technical scheme, the radial swing between the bobbin and the stator assembly is reduced through the first righting part and the second righting part, so that the bobbin and the mounting cylinder are prevented from colliding to cause the voice coil motor to vibrate, and the stability of the voice coil motor is greatly improved.

Optionally, the first elastic sheet and the second elastic sheet are both provided with a deformation groove, and the deformation groove surrounds the first righting portion and the second righting portion.

Through adopting above-mentioned technical scheme, through the deformation groove for first shell fragment easily produces deformation with the second shell fragment, can make simultaneously first righting portion easily produce deformation or reciprocal reply along with the output shaft removes, reduces the rigidity collision between first shell fragment and the shell, can also make simultaneously second righting portion easily produce deformation or reciprocal reply along with the output shaft removes, reduces the rigidity collision between second shell fragment and the shell, thereby promotes this voice coil motor's stability.

Optionally, the output shaft includes a first shaft fixed to the bobbin, a second shaft detachably connected to the first shaft, and a third shaft detachably connected to the second shaft, the first centering portion is installed between the first shaft and the second shaft, and the second centering portion is installed between the second shaft and the third shaft.

Through adopting above-mentioned technical scheme, the output shaft can be dismantled and be linked, makes things convenient for dismouting and use, can be convenient through primary shaft, secondary shaft and third axle be connected with first shell fragment and second shell fragment, and is simple easy to operate.

Optionally, the first pressing ring is provided with a first limiting groove for limiting the position of the first elastic sheet, and the second pressing ring is provided with a second limiting groove for limiting the position of the second elastic sheet.

Through adopting above-mentioned technical scheme, make first shell fragment and second shell fragment can the stable connection on the shell through first spacing groove and second spacing groove, and then provide stable assurance for the stable removal of output shaft.

Optionally, the coil is inserted into the coil insertion groove, and the coil insertion groove is located at one end of the coil holder far away from the output shaft.

Through adopting above-mentioned technical scheme, the coil winding can restrict the position of coil through the caulking groove on the groove bottom of caulking groove for the coil is difficult for breaking away from the line frame, promotes the stability of being connected of coil and line frame, thereby improves the line frame better and removes in stator module's stability, promotes this voice coil motor's stability.

Optionally, the stator assembly includes a first magnet, a second magnet, and two magnetic yokes, the first magnet is fixed to the mounting cylinder, the second magnet is connected to the first magnet, one of the two magnetic yokes is installed between the first magnet and the second magnet, and the other one of the two magnetic yokes is fixed to one end of the second magnet, which is far away from the first magnet.

Through adopting above-mentioned technical scheme, first magnet uses with second magnetic coordination coil, realizes this voice coil motor's service function, and first magnet and second magnet are with the coil, through the magnetic yoke restraint first magnet and second magnet magnetic leakage, promote this voice coil motor's practicality.

Optionally, the method for mounting a high-frequency voice coil motor includes the following steps:

firstly, the stator assembly is arranged in the mounting cylinder;

secondly, winding the coil on the wire frame, then installing the wire frame in the installation cylinder, and sleeving the stator assembly by the wire frame;

thirdly, the first pressing ring is arranged at one end, close to the opening of the installation cylinder, and the first elastic sheet is arranged on the first pressing ring;

fourthly, the second shaft is arranged on the first shaft, and the first elastic sheet is clamped by the first shaft and the second shaft;

fifthly, the second pressure ring is arranged on the first pressure ring, the first elastic sheet is clamped by the first pressure ring and the second pressure ring, and then the second elastic sheet is arranged on the second pressure ring;

and sixthly, the third shaft penetrates through the second elastic sheet to be connected with the second shaft, and the second shaft and the third shaft clamp the second elastic sheet, so that the installation is completed.

In summary, the present application includes at least one of the following beneficial technical effects:

after the coil is powered on, the bobbin and the stator assembly move relatively, the bobbin reciprocates in the shell, the output shaft reciprocates in the shell under the driving of the bobbin, the elastic piece absorbs the vibration of the output shaft in the reciprocating movement process of the output shaft by utilizing the flexibility and elasticity of the elastic piece, and meanwhile, the output shaft stably moves along the axial direction of the output shaft, so that the output shaft is prevented from shaking or shaking, the defect that the output shaft does not move along the axial direction due to radial swing generated between the bobbin and the stator assembly is overcome, and the use stability of the voice coil motor is improved;

through the deformation groove, the first elastic sheet and the second elastic sheet are easy to deform, and the first centering portion is easy to deform or return back and forth along with the movement of the output shaft, so that the rigid collision between the first elastic sheet and the shell is reduced;

the coil is wound on the groove bottom of the caulking groove, and the position of the coil can be limited through the caulking groove, so that the coil is not easy to separate from the wire frame, and the connection stability of the coil and the wire frame is improved.

Drawings

Fig. 1 is a schematic diagram illustrating an overall structure of a voice coil motor according to an embodiment of the present application.

Fig. 2 is an exploded schematic view for showing the overall structure of a voice coil motor according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram for showing the elastic member according to the embodiment of the present application.

Fig. 4 is a schematic structural diagram illustrating a first centering portion and a second centering portion according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram for showing a stator assembly according to an embodiment of the present application.

Fig. 6 is a schematic diagram illustrating an explosion structure of a voice coil motor according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 11. mounting the cylinder; 12. a first pressure ring; 121. a first limit groove; 13. a second pressure ring; 131. a second limit groove; 2. a stator assembly; 21. a first magnet; 22. a second magnet; 23. a magnetic yoke; 3. a mover assembly; 31. a wire frame; 311. an accommodating chamber; 312. caulking grooves; 32. a coil; 33. an output shaft; 331. a first shaft; 332. a second shaft; 3321. a screw; 333. a third axis; 3331. a connecting rod; 4. an elastic member; 41. a first spring plate; 411. a connecting portion; 42. a second elastic sheet; 421. a fixed part; 51. a first righting part; 52. a second righting part; 53. and a deformation groove.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses high frequency voice coil motor. Referring to fig. 1 and 2, a high frequency voice coil motor includes a housing 1, a stator assembly 2 mounted to the housing 1, a mover assembly 3 mounted to the housing 1, and an elastic member 4 coupled to the housing 1, the mover assembly 3 and the stator assembly 2 moving relative to each other. The mover assembly 3 includes a bobbin 31, a coil 32 wound on the bobbin 31, and an output shaft 33 connected to the bobbin 31, wherein one end of the output shaft 33 away from the bobbin 31 is connected to the elastic member 4, and the elastic member 4 is used for the output shaft 33 to move stably. After the coil 32 is powered on, the bobbin 31 and the stator assembly 2 move relatively, the bobbin 31 reciprocates in the housing 1, the output shaft 33 reciprocates in the housing 1 under the driving of the bobbin 31, and in the process of reciprocating the output shaft 33 by using the flexibility and elasticity of the elastic member 4, the elastic member 4 absorbs the vibration of the output shaft 33, and simultaneously, the output shaft 33 stably moves along the axial direction of the output shaft 33, so that the output shaft 33 is prevented from shaking or swaying, the defect that the output shaft 33 does not move along the axial direction due to radial swing generated between the bobbin 31 and the stator assembly 2 is overcome, and the use stability of the voice coil motor is improved.

Referring to fig. 1 and 2, in particular, the housing 1 includes an installation cylinder 11 accommodating the installation mover assembly 3 and the bobbin 31, and a first pressing ring 12 fixed to the installation cylinder 11 using bolts, and a radius of the first pressing ring 12 is larger than a radius of the installation cylinder 11. The bobbin 31 is cylindrical, the bobbin 31 itself has an accommodating cavity 311 for accommodating the stator assembly 2, a gap is left between the inner wall of the accommodating cavity 311 and the stator assembly 2, and the opening of the accommodating cavity 311 faces the bottom of the mounting tube 11. The elastic member 4 includes a first elastic sheet 41, the first elastic sheet 41 is integrally shaped like a triangle, and the first elastic sheet 41 is provided with a connecting portion 411. In the embodiment of the present application, the number of the connecting portions 411 is three, which is only an example and does not limit the number of the connecting portions 411. The connecting portion 411 is fixed to the first pressure ring 12 by using a bolt, and the output shaft 33 coaxially passes through the first pressure ring 12.

The output shaft 33 comprises a first shaft 331 and a second shaft 332, wherein the first shaft 331 is coaxially and integrally formed at one end, far away from the opening of the wire frame 31, the second shaft 332 is coaxially and threadedly connected to the first shaft 331, a screw 3321 is integrally formed on the second shaft 332, the radius of the screw 3321 is smaller than that of the second shaft 332, the screw 3321 penetrates through the first elastic sheet 41 and is in threaded connection with the first shaft 331, the first elastic sheet 41 is clamped by the mutually close end faces of the first shaft 331 and the second shaft 332, and then the first elastic sheet 41 is tightly connected with the output shaft 33. The axis of the output shaft 33 is perpendicular to the first elastic sheet 41, and the axis of the output shaft 33 coincides with the center line of the first elastic sheet 41, and in the process of reciprocating the output shaft 33, the output shaft 33 can reciprocate along the axis direction of the output shaft by using the first elastic sheet 41, so that the output shaft 33 can stably reciprocate, and the movement stability of the output shaft 33 is further improved. In addition, the elasticity of the first elastic sheet 41 can reduce the rigid collision between the output shaft 33 and the first elastic sheet 41, and the service life of the output shaft 33 is prolonged.

Referring to fig. 2 and 3, the housing 1 further includes a second press ring 13 coaxially fixed to the first press ring 12 by using bolts, a radius of the second press ring 13 is equal to a radius of the first press ring 12, and the first resilient tab 41 is disposed between the first press ring 12 and the second press ring 13. The elastic member 4 further includes a second elastic sheet 42, the structure of the second elastic sheet 42 is the same as that of the first elastic sheet 41, the second elastic sheet 42 is provided with a fixing portion 421, and the fixing portion 421 is fixed on the first pressing ring 12 by using a bolt. The output shaft 33 further includes a third shaft 333 coaxially screwed to the second shaft 332, the third shaft 333 being integrally formed with an engaging rod 3331, the radius of the engaging rod 3331 being smaller than that of the third shaft 333. The engaging rod 3331 passes through the second elastic sheet 42 to be in threaded connection with the second shaft 332, and the end surfaces of the third shaft 333 and the second shaft 332 close to each other clamp the second elastic sheet 42. Further, reciprocating movement of the output shaft 33 is limited through the second elastic sheet 42, shaking or shaking of the output shaft 33 is prevented, flexible reciprocating restoring force is provided for movement of the output shaft 33 through the first elastic sheet 41 and the second elastic sheet 42, probability of shaking or shaking of the output shaft 33 is reduced, noise of the voice coil motor can be reduced, and practicability of the voice coil motor is improved.

Referring to fig. 3 and 4, the first elastic sheet 41 is provided with a first centering portion 51 for stable movement of the output shaft 33, the second elastic sheet 42 is provided with a second centering portion 52 for stable movement of the output shaft 33, and both the first centering portion 51 and the second centering portion 52 are connected to the output shaft 33. The first centering portion 51 and the second centering portion 52 can guide the movement of the output shaft 33, so that the output shaft 33 can stably move, and the radial swing between the bobbin 31 and the stator assembly 2 is reduced, thereby preventing the bobbin 31 from colliding with the mounting cylinder 11 to cause the vibration of the voice coil motor, and greatly improving the stability of the voice coil motor.

Referring to fig. 4, the first elastic sheet 41 and the second elastic sheet 42 are both provided with a deformation groove 53, and the deformation groove 53 surrounds the first righting portion 51 and the second righting portion 52. Through the deformation groove 53, make first shell fragment 41 and second shell fragment 42 easily produce deformation, it is also easy along with the output shaft 33 removal that first righting portion 51 produces deformation or reciprocal reply, second righting portion 52 easily produces deformation or reciprocal reply along with the output shaft 33 removal, reduce the rigidity collision between first shell fragment 41 and second shell fragment 42 and the shell 1, and then make first shell fragment 41 and second shell fragment 42 can provide stability for the removal of output shaft 33, in addition, utilize first shell fragment 41 and second shell fragment 42 to limit the movement stroke of output shaft 33, make the periodic movement that carries on that output shaft 33 can be stable.

Referring to fig. 4, the end surface of the first pressure ring 12 close to the second pressure ring 13 is provided with a first limiting groove 121 for limiting the position of the connecting portion 411, the outer wall of the first pressure ring 12 and the inner wall of the first pressure ring 12 are penetrated through by the first limiting groove 121, the connecting portion 411 is arranged in the first limiting groove 121, and the first limiting groove 121 is used for limiting the movement of the connecting portion 411 to prevent the first elastic sheet 41 and the first pressure ring 12 from being displaced, so that the first elastic sheet 41 can be stably connected with the first pressure ring 12. The end face, far away from the first pressure ring 12, of the second pressure ring 13 is provided with a second limiting groove 131 for limiting the position of the fixing portion 421, the second limiting groove 131 penetrates through the outer wall of the second pressure ring 13 and the inner wall of the second pressure ring 13, the fixing portion 421 is arranged in the second limiting groove 131, the position of the fixing portion 421 can be limited through the second limiting groove 131, and the second elastic sheet 42 can be stably fixed on the second pressure ring 13. Make first shell fragment 41 and second shell fragment 42 can be stably connected on shell 1 through first spacing groove 121 and second spacing groove 131, and then provide stable assurance for the stable removal of output shaft 33.

Referring to fig. 5, the bobbin 31 is provided with a caulking groove 312 into which the coil 32 is fitted, the caulking groove 312 being located at an end of the bobbin 31 remote from the output shaft 33. The coil 32 is wound on the groove bottom of the caulking groove 312, and the position of the coil 32 can be restricted by the caulking groove 312, so that the coil 32 is not easily detached from the bobbin 31. The caulking groove 312 can improve the space utilization rate of the bobbin 31, the space utilization rate of the bobbin 31 and the inner wall of the mounting tube 11, and the volume of the bobbin 31 can be reduced, so that the voice coil motor is compact in structure.

Referring to fig. 5, the stator assembly 2 includes a first magnet 21, a second magnet 22 and two yokes 23, the first magnet 21 is fixed to the mounting tube 11, the second magnet 22 is connected to the first magnet 21, and the two yokes 23 are arranged, one of the two yokes 23 is installed between the first magnet 21 and the second magnet 22, and the other is fixed to one end of the second magnet 22 away from the first magnet 21. First magnet 21 and second magnetism cooperate coil 32 to use, realize this voice coil motor's service function, first magnet 21 and second magnet 22 are with coil 32, through yoke 23 restraint first magnet 21 and second magnet 22 magnetic leakage, promote this voice coil motor's practicality.

Referring to fig. 6, a method for mounting a high frequency voice coil motor includes the steps of:

firstly, a stator assembly 2 is arranged in an installation cylinder 11;

secondly, winding the coil 32 on the bobbin 31, then installing the bobbin 31 in the installation cylinder 11, and sleeving the stator assembly 2 by the bobbin 31;

thirdly, the first press ring 12 is arranged at one end, close to the opening of the first press ring, of the installation cylinder 11, and the first elastic sheet 41 is arranged on the first press ring 12;

fourthly, the second shaft 332 is mounted on the first shaft 331, and the first elastic sheet 41 is clamped between the first shaft 331 and the second shaft 332;

fifthly, the second press ring 13 is arranged on the first press ring 12, the first elastic sheet 41 is clamped by the first press ring 12 and the second press ring 13, and then the second elastic sheet 42 is arranged on the second press ring 13;

sixthly, the third shaft 333 penetrates through the second elastic sheet 42 to be connected with the second shaft 332, and the second elastic sheet 42 is clamped by the second shaft 332 and the third shaft 333, so that the installation is completed.

The implementation principle of the high-frequency voice coil motor in the embodiment of the application is as follows: after the coil 32 is powered on, the bobbin 31 and the stator assembly 2 move relatively, the bobbin 31 reciprocates in the housing 1, the output shaft 33 reciprocates in the housing 1 under the driving of the bobbin 31, and in the process of reciprocating the output shaft 33 by using the flexibility and elasticity of the elastic member 4, the elastic member 4 absorbs the vibration of the output shaft 33, and simultaneously, the output shaft 33 stably moves along the axial direction of the output shaft 33, so that the output shaft 33 is prevented from shaking or swaying, the defect that the output shaft 33 does not move along the axial direction due to radial swing generated between the bobbin 31 and the stator assembly 2 is overcome, and the use stability of the voice coil motor is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.