A voice coil motor of a five-axis OIS structure, a photographic device, and an electronic device

Abstract

This invention discloses a five-axis OIS voice coil motor, a photographic device, and an electronic device. The key technical points are: a five-axis OIS voice coil motor, including a voice coil motor body, a three-axis OIS mechanism on the voice coil motor body, and a gimbal OIS unit disposed outside the three-axis OIS mechanism. This invention achieves image stabilization for the translation and deflection of the voice coil motor through the three-axis OIS mechanism, and achieves image stabilization for the rotation of the voice coil motor through the gimbal OIS mechanism, thus realizing five-axis OIS functionality and improving the image stabilization performance of the voice coil motor.

Description

Technical Field

[0001] This invention relates to the field of voice coil motors, and more particularly to a five-axis OIS structure voice coil motor, a photographic device, and an electronic device. Background Technology

[0002] Existing voice coil motors mainly consist of a lens, lens mount, magnet, coil, spring, and housing, with the housing being square in shape.

[0003] Voice coil motors (VCMs) are characterized by high frequency response and high precision. Their main principle is to control the stretching position of a spring plate within a permanent magnetic field by changing the direct current in the motor's coil, thereby driving the spring plate to move up and down and achieve focusing. Mobile phone cameras widely use VCMs for autofocus; the VCM allows adjustment of the lens position to produce a clear image. Traditional voice coil motors mostly only drive the mobile phone camera to move back and forth, resulting in poor focusing performance.

[0004] Some voice coil motors can achieve horizontal movement stabilization, but they cannot achieve voice coil motor flip stabilization, or achieve flip stabilization alone, and cannot achieve multi-axis OIS stabilization.

[0005] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide a voice coil motor, photographic device, and electronic device with a five-axis OIS structure. It achieves anti-shake function for translation and deflection of the voice coil motor through a three-axis OIS mechanism and anti-shake function for flipping of the voice coil motor through a gimbal OIS mechanism, thereby realizing five-axis OIS function and improving the anti-shake performance of the voice coil motor.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a voice coil motor with a five-axis OIS structure, comprising a voice coil motor body, wherein the voice coil motor body is provided with a three-axis OIS mechanism, and a gimbal OIS mechanism is provided on the outside of the three-axis OIS mechanism;

[0008] The three-axis OIS mechanism includes a drive frame sleeved on the voice coil motor body and disposed outside the voice coil motor body, a base disposed on the drive frame, a PCB circuit board, a coil fixing plate connected to the base, and a plurality of three-axis OIS coils disposed on the coil fixing plate and corresponding to the magnets inside the voice coil motor body. The coil fixing plate is located at the end of the voice coil motor body away from the lens inside the voice coil motor body, and the drive frame is movable relative to the base.

[0009] The OIS mechanism of the gimbal includes a housing located on the outside of the drive frame and connected to the base, a mounting spring located inside the housing and connected to the voice coil motor body, four gimbal magnets located on the inner side wall of the housing, and four gimbal coils located on the side wall of the drive frame and corresponding to the gimbal magnets.

[0010] A further configuration of the present invention is as follows: the three-axis OIS coils are configured to be eight, with each magnet in the voice coil motor body corresponding to two three-axis OIS coils.

[0011] A further embodiment of the present invention is that the mounting spring includes a ring-shaped fixed ring portion connected to the voice coil motor body, a connecting ring portion located outside the fixed ring portion, two first connecting portions disposed between the connecting ring portion and the fixed ring portion and arranged symmetrically, a second connecting portion connected to the outer wall of the connecting ring portion and arranged opposite to the first connecting portions, and a mounting portion connected to the second connecting portion and connected to the inner wall of the housing. The fixed ring portion, the first connecting portion, the connecting ring portion, the second connecting portion, and the mounting portion are integrally formed.

[0012] A further feature of the present invention is that the inner wall of the housing is provided with a mounting ring for connecting the mounting part.

[0013] A further feature of the present invention is that the triaxial OIS coil is a flexographic coil, and the triaxial OIS coil is printed on a coil fixing plate.

[0014] A further embodiment of the present invention is a photographic apparatus comprising a voice coil motor with a five-axis OIS structure as described in any one of claims 1 to 5.

[0015] A further embodiment of the present invention is: an electronic device comprising a voice coil motor with a five-axis OIS structure as described in any one of claims 1 to 5.

[0016] In summary, the present invention has the following beneficial effects:

[0017] When the three-axis OIS coil is energized, when the voice coil motor body and drive frame are displaced perpendicular to the lens square, the force between the three-axis OIS coil and the magnet inside the voice coil motor body drives the voice coil motor body and drive frame to quickly return to their original position, thus achieving horizontal displacement image stabilization. At the same time, when the voice coil motor body deflects about the lens square axis, the force between the three-axis OIS coil and the magnet inside the voice coil motor body also drives the voice coil motor body and drive frame to quickly deflect and return to their original position, thereby achieving the three-axis image stabilization function of the voice coil motor.

[0018] When the gimbal coil is energized, and the voice coil motor body and drive frame flip, the force between the gimbal coil and the gimbal magnet enables the voice coil motor body and drive frame to quickly correct and reset, thus achieving anti-shake function in two vertical axial directions.

[0019] Therefore, a three-axis OIS mechanism and a gimbal OIS mechanism are used to achieve five-axis anti-shake function for the voice coil motor, thereby improving the anti-shake performance of the voice coil motor.

[0020] By installing springs, the relative position of the voice coil motor is effectively fixed, and the voice coil motor is kept balanced and stable. At the same time, it facilitates the three-axis OIS mechanism and the gimbal OIS mechanism to achieve the anti-shake function of the voice coil motor.

[0021] Using a triaxial OIS coil as a flexible printing coil can effectively reduce the size of this embodiment and save processing costs. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of Example 1;

[0023] Figure 2 This is a cross-sectional view of Example 1;

[0024] Figure 3 This is a cross-sectional view after the explosion of Example 1;

[0025] Figure 4 This is a schematic diagram of the spring installation in Example 1.

[0026] The numbers in the diagram represent the following components: 1. Voice coil motor body; 2. Drive frame; 3. Base; 4. PCB circuit board; 5. Coil fixing plate; 6. Triaxial OIS coil; 7. Housing; 8. Mounting spring; 9. Gimbal magnet; 10. Gimbal coil; 11. Fixing ring; 12. Connecting ring; 13. First connecting part; 14. Second connecting part; 15. Mounting part; 16. Mounting ring. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to the figures and specific embodiments.

[0028] Example 1: As Figures 1 to 4 As shown, the present invention proposes a five-axis OIS structure voice coil motor, including a voice coil motor body 1, which can be an existing voice coil motor structure. The voice coil motor body 1 is provided with a three-axis OIS mechanism, and a gimbal OIS mechanism is provided on the outside of the three-axis OIS mechanism.

[0029] The three-axis OIS mechanism includes a drive frame 2 mounted on the outside of the voice coil motor body 1, a base 3 mounted on the drive frame 2, a PCB circuit board 4, a coil fixing plate 5 connected to the base 3, and several three-axis OIS coils 6 mounted on the coil fixing plate 5 and corresponding to the magnets inside the voice coil motor body 1. The coil fixing plate 5 is located at the end of the voice coil motor body 1 away from the lens inside the voice coil motor body 1. The voice coil motor body 1 is mounted on the drive frame 2, which is movable relative to the base 3. There are eight three-axis OIS coils 6, with each magnet inside the voice coil motor body 1 corresponding to two three-axis OIS coils 6, meaning that two adjacent three-axis OIS coils 6 are located directly below the magnet inside the voice coil motor body 1. When the three-axis OIS coil 6 is energized, the voice coil motor body 1 and drive frame 2 move perpendicular to the lens square. The force between the three-axis OIS coil 6 and the magnet inside the voice coil motor body 1 drives the voice coil motor body 1 and drive frame 2 to quickly return to their original positions, thus achieving horizontal displacement image stabilization. At the same time, when the voice coil motor body 1 deflects with the lens square as the axis, the force between the three-axis OIS coil 6 and the magnet inside the voice coil motor body 1 also drives the voice coil motor body 1 and drive frame 2 to quickly deflect and return to their original positions, thereby realizing the three-axis image stabilization function of the voice coil motor.

[0030] The OIS (Optical Image Stabilizer) mechanism of the gimbal includes a housing 7 located outside the drive frame 2 and connected to the base 3; mounting springs 8 located inside the housing 7 and connected to the voice coil motor body 1; four gimbal magnets 9 located on the inner sidewall of the housing 7; and four gimbal coils 10 located on the sidewall of the drive frame 2 and corresponding to the gimbal magnets 9. The housing 7 is fixedly installed to the base 3 and covers the voice coil motor body 1 and the drive frame 2. The mounting springs 8 suspend the voice coil motor body 1 and the drive frame 2 within the housing 7, facilitating the anti-shake function. When the gimbal coils 10 are energized, if the voice coil motor body 1 and the drive frame 2 flip, the force between the gimbal coils 10 and the gimbal magnets 9 quickly corrects and resets the voice coil motor body 1 and the drive frame 2, achieving anti-shake function in two vertical axial directions.

[0031] Therefore, a three-axis OIS mechanism and a gimbal OIS mechanism are used to achieve five-axis anti-shake function for the voice coil motor, thereby improving the anti-shake performance of the voice coil motor.

[0032] The specific structure of the spring 8 includes a fixed ring portion 11 that is annular and connected to the voice coil motor body 1; a connecting ring portion 12 located outside the fixed ring portion 11; two first connecting portions 13 symmetrically arranged between the connecting ring portion 12 and the fixed ring portion 11; a second connecting portion 14 connected to the outer wall of the connecting ring portion 12 and arranged opposite to the first connecting portion 13; and a mounting portion 15 connected to the second connecting portion 14 and connected to the inner wall of the housing 7. The fixed ring portion 11, the first connecting portion 13, the connecting ring portion 12, the second connecting portion 14, and the mounting portion 15 are integrally formed. There can be two mounting portions 15, two of which are integrally formed with the second connecting portion 14, and the other two first connecting portions 13 and second connecting portions 14 are located at the four corners of the connecting ring portion 12. A mounting ring 16 for fixing the mounting portion 15 of the spring 8 is fixedly installed on the inner wall of the housing 7, and the mounting ring 16 is fixed to the bottom surface of the housing 7. By installing spring 8, the relative position of the voice coil motor is effectively fixed, and the voice coil motor is kept balanced and stable. At the same time, it facilitates the three-axis OIS mechanism and the gimbal OIS mechanism to realize the anti-shake function of the voice coil motor.

[0033] In this embodiment, the triaxial OIS coil 6 can be configured as a flexographic coil, which is printed on the coil fixing plate 5. By using the triaxial OIS coil 6 as a flexographic coil, the size of this embodiment can be effectively reduced, saving processing costs.

[0034] Example 2: A photographic device, wherein the photographic device is equipped with a voice coil motor with a five-axis OIS structure as described in Example 1.

[0035] Example 3: An electronic device in which a voice coil motor with a five-axis OIS structure as described in Example 1 is used.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A five-axis OIS structure voice coil motor, comprising a voice coil motor body (1), characterized in that: The voice coil motor body (1) is provided with a three-axis OIS mechanism, and a gimbal OIS mechanism is provided on the outside of the three-axis OIS mechanism; The three-axis OIS mechanism includes a drive frame (2) disposed on the outside of the voice coil motor body (1) and sleeved on the voice coil motor body (1), a base (3) disposed on the drive frame (2), a PCB circuit board (4), a coil fixing plate (5) connected to the base (3), and a plurality of three-axis OIS coils (6) disposed on the coil fixing plate (5) and corresponding to the magnets inside the voice coil motor body (1). The coil fixing plate (5) is located at the end of the voice coil motor body (1) away from the lens inside the voice coil motor body (1), and the drive frame (2) can move relative to the base (3). The gimbal OIS mechanism includes a housing (7) disposed on the outside of the drive frame (2) and connected to the base (3), a mounting spring (8) disposed inside the housing (7) and connected to the voice coil motor body (1), four gimbal magnets (9) disposed on the inner side wall of the housing (7), and four gimbal coils (10) disposed on the side wall of the drive frame (2) and corresponding to the gimbal magnets (9). When the three-axis OIS coil (6) is energized, when the voice coil motor body (1) moves perpendicular to the lens direction, the force between the three-axis OIS coil (6) and the magnet inside the voice coil motor body (1) drives the voice coil motor body (1) to quickly reset, thus achieving horizontal displacement image stabilization. At the same time, when the voice coil motor body (1) deflects about the lens axis, the force between the three-axis OIS coil (6) and the magnet inside the voice coil motor body (1) also drives the voice coil motor body (1) to quickly deflect and reset, thus achieving the three-axis image stabilization function of the voice coil motor. When the gimbal coil (10) is energized, when the voice coil motor body (1) and the drive frame (2) flip, the force between the gimbal coil (10) and the gimbal magnet (9) drives the voice coil motor body (1) and the drive frame (2) to quickly correct and reset, thus achieving the two vertical axis flip image stabilization functions.

2. The voice coil motor with a five-axis OIS structure according to claim 1, characterized in that: The three-axis OIS coils (6) are set to eight, and each magnet in the voice coil motor body (1) corresponds to two three-axis OIS coils (6).

3. A voice coil motor with a five-axis OIS structure according to claim 1, characterized in that: The mounting spring (8) includes a ring-shaped fixed ring portion (11) connected to the voice coil motor body (1), a connecting ring portion (12) located outside the fixed ring portion (11), two first connecting portions (13) arranged symmetrically between the connecting ring portion (12) and the fixed ring portion (11), a second connecting portion (14) connected to the outer wall of the connecting ring portion (12) and arranged opposite to the first connecting portion (13), and a mounting portion (15) connected to the second connecting portion (14) and connected to the inner wall of the housing (7). The fixed ring portion (11), the first connecting portion (13), the connecting ring portion (12), the second connecting portion (14), and the mounting portion (15) are integrally formed.

4. A voice coil motor with a five-axis OIS structure according to claim 3, characterized in that: The inner wall of the housing (7) is provided with a mounting ring (16) for connecting the mounting part (15).

5. A voice coil motor with a five-axis OIS structure according to claim 1 or 2, characterized in that: The triaxial OIS coil (6) is a flexible printed coil, and the triaxial OIS coil (6) is printed on the coil fixing plate (5).

6. A photographic apparatus, characterized in that: The voice coil motor with a five-axis OIS structure as described in any one of claims 1 to 5.

7. An electronic device, characterized in that: The voice coil motor with a five-axis OIS structure as described in any one of claims 1 to 5.

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