A high frequency voice coil motor

Abstract

The present invention discloses a high-frequency voice coil motor, comprising a housing, a stator assembly mounted on the housing, a mover assembly mounted on the housing, and an elastic member connected to the housing; the mover assembly comprises a bobbin, a coil mounted on the bobbin, and an output shaft connected to the bobbin, and one end of the output shaft away from the bobbin is connected to the elastic member, and the elastic member is used for the output shaft to move stably. After the coil is energized, the bobbin and the stator assembly move relative to each other, and the bobbin moves back and forth in the housing. Driven by the bobbin, the output shaft moves back and forth in the housing, and the elastic member absorbs the vibration of the output shaft during the reciprocating movement of the output shaft by utilizing the flexibility and elasticity of the elastic member itself, and at the same time, the output shaft moves stably along its axial direction, so as to prevent the output shaft from shaking or swaying, and make up for the defect that the output shaft does not move in the axial direction due to radial swing between the bobbin and the stator assembly, thereby improving the stability of the voice coil motor.

Description

Technical Field

[0001] The present application relates to the field of voice coil motors, and in particular to a high-frequency voice coil motor. Background Art

[0002] The voice coil motor is a special form of direct drive motor with the characteristics of simple structure, small size, high acceleration and fast response. It can produce linear motion and does not require intermediate transmission mechanisms such as belts and gears in the drive system, which greatly reduces energy loss, saves costs, and greatly improves the response speed and control accuracy of the system.

[0003] At present, voice coil motors are widely used in the market on linear motion tables composed of linear guides and related mechanical accessories. In actual use, under the action of the coil, the mounting body that fixes the coil and the magnet will move relative to each other along the axis of the coil, and the mounting body will swing radially. The radial swing of the mounting body will cause the output end of the voice coil motor to move unstably, that is, the output end of the voice coil motor will shake or sway, and there is a problem of poor stability in the use of the voice coil motor. Summary of the invention

[0004] In order to improve the problem of poor stability in use of voice coil motors, the present application provides a high-frequency voice coil motor.

[0005] The high frequency voice coil motor provided in this application adopts the following technical solution:

[0006] A high-frequency voice coil motor comprises a housing, a stator assembly mounted on the housing, a mover assembly mounted on the housing and an elastic member connected to the housing, wherein the mover assembly moves relative to the stator assembly; the mover assembly comprises a bobbin, a coil mounted on the bobbin and an output shaft connected to the bobbin, an end of the output shaft away from the bobbin is connected to the elastic member, and the elastic member is used for stable movement of the output shaft.

[0007] By adopting the above technical solution, after the coil is energized, the bobbin and the stator assembly produce relative movement, and the bobbin moves back and forth in the housing. Driven by the bobbin, the output shaft moves back and forth in the housing. The elastic member itself is used to absorb the vibration of the output shaft during the reciprocating movement of the output shaft, and at the same time, the output shaft moves stably along its axial direction, so as to prevent the output shaft from shaking or swaying, and compensate for the defect that the output shaft does not move in the axial direction due to radial swing between the bobbin and the stator assembly, thereby improving the stability of the voice coil motor.

[0008] Optionally, the housing includes a mounting tube for accommodating the movable assembly and the wire rack and a first pressure ring connected to the mounting tube, the wire rack is cylindrical, and the stator assembly is placed in the wire rack; the elastic member includes a first spring sheet, the first spring sheet is installed at an end of the first pressure ring away from the mounting tube, the output shaft coaxially passes through the first pressure ring, and the output shaft is connected to the first spring sheet.

[0009] By adopting the above technical solution, the first spring sheet is used to enable the output shaft to reciprocate along its own axial direction, so that the output shaft can reciprocate stably, thereby improving the stability of the output shaft movement to prevent the output shaft from shaking or swaying, thereby improving the stability of the voice coil motor.

[0010] Optionally, the shell also includes a second pressure ring coaxially connected to the first pressure ring, and the first spring sheet is placed between the first pressure ring and the second pressure ring; the elastic member also includes a second spring sheet, the second spring sheet is installed at an end of the second pressure ring away from the first pressure ring, and the output shaft is connected to the second spring sheet.

[0011] By adopting the above technical solution, the reciprocating movement of the output shaft is further limited by the second spring sheet, and the elasticity of the second spring sheet is used to prevent the output shaft from shaking or swaying, so that the output shaft can move more stably, thereby improving the stability of the output shaft movement.

[0012] Optionally, the first spring piece is provided with a first straightening portion for stabilizing the movement of the output shaft, and the second spring piece is provided with a second straightening portion for stabilizing the movement of the output shaft, and both the first straightening portion and the second straightening portion are connected to the output shaft.

[0013] By adopting the above technical solution, the radial swing between the bobbin and the stator assembly is reduced by the first and second straightening parts to prevent the bobbin from colliding with the mounting tube and causing the voice coil motor to vibrate, thereby greatly improving the stability of the voice coil motor.

[0014] Optionally, the first spring sheet and the second spring sheet are both provided with a deformation groove, and the deformation groove surrounds the first straightening portion and the second straightening portion.

[0015] By adopting the above technical solution, the first spring sheet and the second spring sheet can be easily deformed through the deformation groove, and the first straightening part can be easily deformed or reciprocated as the output shaft moves, thereby reducing the rigid collision between the first spring sheet and the outer shell. At the same time, the second straightening part can be easily deformed or reciprocated as the output shaft moves, thereby reducing the rigid collision between the second spring sheet and the outer shell, thereby improving the stability of the voice coil motor.

[0016] Optionally, the output shaft includes a first shaft fixed to the wire rack, a second shaft detachably connected to the first shaft, and a third shaft detachably connected to the second shaft, the first straightening portion is installed between the first shaft and the second shaft, and the second straightening portion is installed between the second shaft and the third shaft.

[0017] By adopting the above technical solution, the output shaft is detachably connected, which is convenient for disassembly and use. The first shaft, the second shaft and the third shaft can be conveniently connected to the first spring sheet and the second spring sheet, which is simple and easy to operate.

[0018] Optionally, the first pressing ring is provided with a first limiting groove for limiting the position of the first elastic piece, and the second pressing ring is provided with a second limiting groove for limiting the position of the second elastic piece.

[0019] By adopting the above technical solution, the first elastic sheet and the second elastic sheet can be stably connected to the housing through the first limiting groove and the second limiting groove, thereby providing a stable guarantee for the stable movement of the output shaft.

[0020] Optionally, the bobbin is provided with an embedding groove for embedding the coil, and the embedding groove is located at an end of the bobbin away from the output shaft.

[0021] By adopting the above technical solution, the coil is wound on the bottom of the embedded slot, and the position of the coil can be limited by the embedded slot, so that the coil is not easy to detach from the bobbin, thereby improving the connection stability between the coil and the bobbin, thereby better improving the stability of the bobbin moving on the stator assembly, and improving the stability of the voice coil motor.

[0022] Optionally, the stator assembly includes a first magnet, a second magnet and a yoke, the first magnet is fixed to the mounting tube, the second magnet is connected to the first magnet, and two yokes are provided, one of which is installed between the first magnet and the second magnet, and the other is fixed to an end of the second magnet away from the first magnet.

[0023] By adopting the above technical solution, the first magnet and the second magnet are used in conjunction with the coil to realize the use function of the voice coil motor. The first magnet and the second magnet are in the same coil, and the magnetic leakage of the first magnet and the second magnet is constrained by the magnetic yoke, thereby improving the practicality of the voice coil motor.

[0024] Optionally, a method for installing a high-frequency voice coil motor comprises the following steps:

[0025] The first step is to install the stator assembly in the installation cylinder;

[0026] In the second step, the coil is firstly wound on the bobbin, and then the bobbin is installed in the installation tube, and the bobbin covers the stator assembly;

[0027] Step 3: The first pressing ring is installed on the end of the installation tube close to its opening, and the first elastic sheet is installed on the first pressing ring;

[0028] Step 4: the second shaft is installed on the first shaft, and the first shaft and the second shaft clamp the first elastic sheet;

[0029] Step 5: The second pressing ring is installed on the first pressing ring, the first pressing ring and the second pressing ring clamp the first elastic sheet, and then the second elastic sheet is installed on the second pressing ring;

[0030] In the sixth step, the third shaft passes through the second elastic sheet and is connected to the second shaft, and the second shaft and the third shaft clamp the second elastic sheet, and the installation is completed.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] After the coil is energized, the bobbin and the stator assembly move relative to each other, and the bobbin moves back and forth on the housing. Driven by the bobbin, the output shaft moves back and forth on the housing. The elastic member absorbs the vibration of the output shaft during the reciprocating movement of the output shaft by utilizing its own flexibility and elasticity, and at the same time enables the output shaft to move stably along its axial direction, so as to prevent the output shaft from shaking or swaying, and compensate for the defect that the output shaft does not move in the axial direction due to radial swing between the bobbin and the stator assembly, thereby improving the stability of the voice coil motor.

[0033] The deformation groove makes it easy for the first spring sheet and the second spring sheet to deform, and at the same time, the first straightening portion can be easily deformed or reciprocated along with the movement of the output shaft, thereby reducing the rigid collision between the first spring sheet and the housing;

[0034] The coil is wound on the bottom of the embedded groove, and the embedded groove can limit the position of the coil, so that the coil is not easy to be separated from the wire rack, thereby improving the connection stability between the coil and the wire rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the voice coil motor used to illustrate the embodiment of the present application.

[0036] Figure 2 It is an exploded schematic diagram used to illustrate the overall structure of the voice coil motor according to an embodiment of the present application.

[0037] Figure 3 It is a schematic diagram of the structure of the elastic member used to illustrate the embodiment of the present application.

[0038] Figure 4It is a schematic structural diagram used to illustrate the first and second righting parts of the embodiment of the present application.

[0039] Figure 5 It is a structural schematic diagram used to illustrate the stator assembly in an embodiment of the present application.

[0040] Figure 6 It is a schematic diagram of the exploded structure of the voice coil motor used to illustrate the embodiment of the present application.

[0041] Explanation of the accompanying drawings: 1. outer shell; 11. mounting tube; 12. first pressure ring; 121. first limiting groove; 13. second pressure ring; 131. second limiting groove; 2. stator assembly; 21. first magnet; 22. second magnet; 23. yoke; 3. mover assembly; 31. wire rack; 311. accommodating cavity; 312. embedded groove; 32. coil; 33. output shaft; 331. first shaft; 332. second shaft; 3321. screw; 333. third shaft; 3331. connecting rod; 4. elastic member; 41. first spring sheet; 411. connecting part; 42. second spring sheet; 421. fixing part; 51. first straightening part; 52. second straightening part; 53. deformation groove. DETAILED DESCRIPTION

[0042] The present application is further described in detail below in conjunction with the accompanying drawings.

[0043] The present application embodiment discloses a high frequency voice coil motor. Figure 1 and Figure 2 A high-frequency voice coil motor includes a housing 1, a stator assembly 2 mounted on the housing 1, a mover assembly 3 mounted on the housing 1, and an elastic member 4 connected to the housing 1, wherein the mover assembly 3 moves relative to the stator assembly 2. 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 energized, the bobbin 31 and the stator assembly 2 move relative to each other, and the bobbin 31 reciprocates in the housing 1. Driven by the bobbin 31, the output shaft 33 reciprocates in the housing 1. The elastic member 4 absorbs the vibration of the output shaft 33 during the reciprocating movement of the output shaft 33 due to its own flexibility and elasticity, and at the same time enables the output shaft 33 to move stably along its axial direction, so as to prevent the output shaft 33 from shaking or swaying, and compensate for the defect that the output shaft 33 does not move in the axial direction due to radial swing between the bobbin 31 and the stator assembly 2, thereby improving the stability of the voice coil motor.

[0044] Reference Figure 1 and Figure 2Specifically, the housing 1 includes a mounting tube 11 for accommodating and installing the movable subassembly 3 and the wire frame 31, and a first pressure ring 12 fixed to the mounting tube 11 by bolts, and the radius of the first pressure ring 12 is greater than the radius of the mounting tube 11. The wire frame 31 is cylindrical, and the wire frame 31 itself has a receiving cavity 311 for accommodating the stator assembly 2, and a gap is left between the inner wall of the receiving cavity 311 and the stator assembly 2, and the opening of the receiving cavity 311 faces the bottom of the mounting tube 11. The elastic member 4 includes a first spring sheet 41, which is triangular in shape as a whole, and the first spring sheet 41 is provided with a connecting portion 411. In the embodiment of the present application, three connecting portions 411 are provided, which is only for example description, and the number of connecting portions 411 is not limited. The connecting portion 411 is fixed to the first pressure ring 12 by using bolts, and the output shaft 33 coaxially passes through the first pressure ring 12.

[0045] The output shaft 33 includes a first shaft 331 coaxially integrally formed at one end of the wire frame 31 away from the opening thereof and a second shaft 332 coaxially threadedly connected to the first shaft 331. The second shaft 332 is integrally formed with a screw 3321, the radius of the screw 3321 is smaller than the radius of the second shaft 332, the screw 3321 passes through the first elastic sheet 41 and is threadedly connected to the first shaft 331, and the first elastic sheet 41 is clamped by the end surfaces of the first shaft 331 and the second shaft 332 that are close to each other, thereby realizing a tight connection between the first elastic sheet 41 and 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. In the process of reciprocating movement of the output shaft 33, the first elastic sheet 41 is used to enable the output shaft 33 to reciprocate along its own axis, so that the output shaft 33 can reciprocate stably, thereby improving the stability of the movement of the output shaft 33. In addition, the elasticity of the first elastic sheet 41 itself can reduce the rigid collision between the output shaft 33 and the first elastic sheet 41 , thereby increasing the service life of the output shaft 33 .

[0046] Reference Figure 2 and Figure 3The housing 1 further includes a second pressing ring 13 coaxially fixed to the first pressing ring 12 by bolts, the radius of the second pressing ring 13 is equal to the radius of the first pressing ring 12, and the first spring sheet 41 is placed between the first pressing ring 12 and the second pressing ring 13. The elastic member 4 further includes a second spring sheet 42, the structure of the second spring sheet 42 is the same as the structure of the first spring sheet 41, and the second spring sheet 42 is provided with a fixing portion 421, and the fixing portion 421 is fixed to the first pressing ring 12 by bolts. The output shaft 33 further includes a third shaft 333 coaxially threadedly connected to the second shaft 332, and the third shaft 333 is integrally formed with a connecting rod 3331, and the radius of the connecting rod 3331 is smaller than the radius of the third shaft 333. The connecting rod 3331 passes through the second spring sheet 42 and is threadedly connected to the second shaft 332, and the end faces of the third shaft 333 and the second shaft 332 that are close to each other clamp the second spring sheet 42. The reciprocating movement of the output shaft 33 is further limited by the second spring clip 42 to prevent the output shaft 33 from shaking or swaying. At the same time, the first spring clip 41 and the second spring clip 42 provide a flexible reciprocating restoring force for the movement of the output shaft 33, thereby reducing the probability of shaking or swaying of the output shaft 33. In addition, the noise of the voice coil motor can be reduced, thereby improving the practicality of the voice coil motor.

[0047] Reference Figure 3 and Figure 4 The first spring sheet 41 is provided with a first straightening portion 51 for stable movement of the output shaft 33, and the second spring sheet 42 is provided with a second straightening portion 52 for stable movement of the output shaft 33, and both the first straightening portion 51 and the second straightening portion 52 are connected to the output shaft 33. The first straightening portion 51 and the second straightening portion 52 can guide the movement of the output shaft 33, so that the output shaft 33 can move stably, and at the same time reduce the radial swing between the bobbin 31 and the stator assembly 2, so as to prevent the bobbin 31 from colliding with the mounting tube 11 and causing the voice coil motor to vibrate, thereby greatly improving the stability of the voice coil motor.

[0048] Reference Figure 4 The first spring sheet 41 and the second spring sheet 42 are both provided with a deformation groove 53, and the deformation groove 53 surrounds the first straightening portion 51 and the second straightening portion 52. Through the deformation groove 53, the first spring sheet 41 and the second spring sheet 42 are easy to deform, that is, the first straightening portion 51 is easy to deform or reciprocate with the movement of the output shaft 33, and the second straightening portion 52 is easy to deform or reciprocate with the movement of the output shaft 33, thereby reducing the rigid collision between the first spring sheet 41 and the second spring sheet 42 and the housing 1, so that the first spring sheet 41 and the second spring sheet 42 can provide stability for the movement of the output shaft 33. In addition, the first spring sheet 41 and the second spring sheet 42 are used to limit the movement stroke of the output shaft 33, so that the output shaft 33 can stably perform periodic movement.

[0049] Reference Figure 4The first pressing ring 12 is provided with a first limiting groove 121 for limiting the position of the connecting portion 411 on the end surface close to the second pressing ring 13. The first limiting groove 121 penetrates the outer wall of the first pressing ring 12 and the inner wall of the first pressing ring 12. The connecting portion 411 is placed in the first limiting groove 121. The first limiting groove 121 is used to limit the movement of the connecting portion 411 to prevent the first spring piece 41 and the first pressing ring 12 from being offset in position, so that the first spring piece 41 can be stably connected to the first pressing ring 12. The second pressing ring 13 is provided with a second limiting groove 131 for limiting the position of the fixing portion 421 on the end surface away from the first pressing ring 12. The second limiting groove 131 penetrates the outer wall of the second pressing ring 13 and the inner wall of the second pressing ring 13. The fixing portion 421 is placed in the second limiting groove 131. The position of the fixing portion 421 can be limited by the second limiting groove 131, so that the second spring piece 42 can be stably fixed on the second pressing ring 13. The first limiting groove 121 and the second limiting groove 131 enable the first elastic sheet 41 and the second elastic sheet 42 to be stably connected to the housing 1 , thereby providing a stable guarantee for the stable movement of the output shaft 33 .

[0050] Reference Figure 5 The bobbin 31 is provided with an embedding groove 312 for embedding the coil 32, and the embedding groove 312 is located at one end of the bobbin 31 away from the output shaft 33. The coil 32 is wound on the bottom of the embedding groove 312, and the position of the coil 32 can be limited by the embedding groove 312, so that the coil 32 is not easily separated from the bobbin 31. The embedding groove 312 can improve the space utilization rate of the bobbin 31, improve the space utilization rate of the bobbin 31 and the inner wall of the mounting tube 11, and reduce the volume of the bobbin 31, so that the structure of the voice coil motor is compact.

[0051] Reference Figure 5 The stator assembly 2 includes a first magnet 21, a second magnet 22 and a yoke 23. The first magnet 21 is fixed to the mounting tube 11, the second magnet 22 is connected to the first magnet 21, and two yokes 23 are provided, one of which is installed between the first magnet 21 and the second magnet 22, and the other is fixed to an end of the second magnet 22 away from the first magnet 21. The first magnet 21 and the second magnet cooperate with the coil 32 to realize the function of the voice coil motor. The first magnet 21 and the second magnet 22 are used with the coil 32, and the magnetic leakage of the first magnet 21 and the second magnet 22 is restricted by the yoke 23, thereby improving the practicality of the voice coil motor.

[0052] Reference Figure 6 , a method for installing a high frequency voice coil motor, comprising the following steps:

[0053] In the first step, the stator assembly 2 is installed in the installation cylinder 11;

[0054] In the second step, the coil 32 is firstly wound on the bobbin 31, and then the bobbin 31 is installed in the installation tube 11, and the bobbin 31 covers the stator assembly 2;

[0055] Step 3: The first pressing ring 12 is installed on the end of the installation tube 11 close to its opening, and the first elastic sheet 41 is installed on the first pressing ring 12;

[0056] Step 4: The second shaft 332 is installed on the first shaft 331 , and the first shaft 331 and the second shaft 332 clamp the first elastic sheet 41 ;

[0057] Step 5: The second pressing ring 13 is installed on the first pressing ring 12 , the first pressing ring 12 and the second pressing ring 13 clamp the first elastic sheet 41 , and then the second elastic sheet 42 is installed on the second pressing ring 13 ;

[0058] Step 6: The third shaft 333 passes through the second elastic sheet 42 and is connected to the second shaft 332 . The second shaft 332 and the third shaft 333 clamp the second elastic sheet 42 , and the installation is completed.

[0059] The implementation principle of a high-frequency voice coil motor in the embodiment of the present application is as follows: after the coil 32 is energized, the bobbin 31 and the stator assembly 2 move relative to each other, and the bobbin 31 reciprocates in the housing 1. Driven by the bobbin 31, the output shaft 33 reciprocates in the housing 1. The elastic member 4 absorbs the vibration of the output shaft 33 during the reciprocating movement of the output shaft 33 by utilizing its own flexibility and elasticity, and at the same time enables the output shaft 33 to move stably along its axial direction, so as to prevent the output shaft 33 from shaking or swaying, and compensate for the defect that the output shaft 33 does not move in the axial direction due to radial swing between the bobbin 31 and the stator assembly 2, thereby improving the stability of the voice coil motor.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high frequency voice coil motor, characterized in that: The invention comprises a housing (1), a stator assembly (2) mounted on the housing (1), a mover assembly (3) mounted on the housing (1), and an elastic member (4) connected to the housing (1); the mover assembly (3) and the stator assembly (2) move relative to each other; the mover assembly (3) comprises a bobbin (31), a coil (32) mounted on the bobbin (31), and an output shaft (33) connected to the bobbin (31); an 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; The housing (1) comprises a mounting tube (11) for accommodating the movable assembly (3) and the bobbin (31), and a first pressure ring (12) connected to the mounting tube (11); the bobbin (31) is cylindrical, and the stator assembly (2) is placed inside the bobbin (31); the elastic member (4) comprises a first spring sheet (41), the first spring sheet (41) is mounted on an end of the first pressure ring (12) away from the mounting tube (11); the output shaft (33) coaxially passes through the first pressure ring (12), and the output shaft (33) is connected to the first spring sheet (41); The housing (1) further comprises a second pressure ring (13) coaxially connected to the first pressure ring (12), and the first elastic sheet (41) is disposed between the first pressure ring (12) and the second pressure ring (13); the elastic member (4) further comprises a second elastic sheet (42), the second elastic sheet (42) being mounted on an end of the second pressure ring (13) away from the first pressure ring (12), and the output shaft (33) is connected to the second elastic sheet (42); The output shaft (33) comprises a first shaft (331) fixed to 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 pressing ring (12) is provided with a first limiting groove (121) for limiting the position of the first elastic sheet (41), and the second pressing ring (13) is provided with a second limiting groove (131) for limiting the position of the second elastic sheet (42); The high frequency voice coil motor is assembled by the following steps: In the first step, the stator assembly (2) is installed in the installation cylinder (11); In a second step, the coil (32) is firstly wound on the bobbin (31), and then the bobbin (31) is installed in the installation cylinder (11), and the bobbin (31) covers the stator assembly (2); In the third step, the first pressure ring (12) is installed on an end of the installation tube (11) close to its own opening, and the first elastic sheet (41) is installed on the first pressure ring (12); In a fourth step, the second shaft (332) is installed on the first shaft (331), and the first shaft (331) and the second shaft (332) clamp the first elastic sheet (41); Step 5: the second pressing ring (13) is installed on the first pressing ring (12); the first pressing ring (12) and the second pressing ring (13) clamp the first elastic sheet (41); and then the second elastic sheet (42) is installed on the second pressing ring (13); In the sixth step, the third shaft (333) passes through the second elastic piece (42) and is connected to the second shaft (332). The second shaft (332) and the third shaft (333) clamp the second elastic piece (42), and the installation is completed.

2. A high frequency voice coil motor according to claim 1, characterized in that: The first spring piece (41) is provided with a first straightening portion (51) for stabilizing the movement of the output shaft (33), and the second spring piece (42) is provided with a second straightening portion (52) for stabilizing the movement of the output shaft (33), and both the first straightening portion (51) and the second straightening portion (52) are connected to the output shaft (33).

3. A high frequency voice coil motor according to claim 2, characterized in that: 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 straightening portion (51) and the second straightening portion (52).

4. A high frequency voice coil motor according to claim 3, characterized in that: The first straightening portion (51) is installed between the first shaft (331) and the second shaft (332), and the second straightening portion (52) is installed between the second shaft (332) and the third shaft (333).

5. A high frequency voice coil motor according to claim 1, characterized in that: The bobbin (31) is provided with an embedding groove (312) for the coil (32) to be embedded, and the embedding groove (312) is located at an end of the bobbin (31) away from the output shaft (33).

6. A high frequency voice coil motor according to claim 1, characterized in that: The stator assembly (2) comprises a first magnet (21), a second magnet (22) and a yoke (23), wherein the first magnet (21) is fixed to the mounting tube (11), the second magnet (22) is connected to the first magnet (21), and two yokes (23) are provided, one of which is installed between the first magnet (21) and the second magnet (22), and the other is fixed to an end of the second magnet (22) away from the first magnet (21).

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