A three-axis shift anti-shake gimbal for a micro camera

Abstract

The present invention relates to the technical field of voice coil motors, and is specifically a three-axis shift anti-shake gimbal for a miniature camera, which is characterized by comprising a gimbal base, a sealing carrier, a first carrier and a second carrier; the bottom surface of the gimbal base is provided with a lower magnetic conductive metal plate group, an X-direction driving coil group, a Y-direction driving coil group, a Y-direction position sensing element, and an X-direction position sensing element; a photosensitive chip is fixed on the upper surface of the first carrier, and an upper magnetic conductive metal plate group, a rotating driving coil around the Z axis and a rotating position sensing element are fixed on the lower surface; the second carrier is located between the gimbal base and the first carrier, and a magnet group corresponding to the upper magnetic conductive metal plate group and the lower magnetic conductive metal plate group is provided on the second carrier, and a ball support structure is provided between the first carrier and the second carrier, and between the second carrier and the gimbal base. The present invention aims to solve the problem that the existing technology cannot eliminate the imaging blur caused by the shaking and rotation of the lens in multiple directions, and greatly improve the imaging quality.

Description

Technical Field

[0001] The present invention relates to the technical field of voice coil motors, and in particular to a three-axis shift anti-shake gimbal for a miniature camera, which is suitable for mobile camera equipment. Background Art

[0002] Since the voice coil motor (VCM) has the advantages of simple structure, small size, low energy consumption, no noise, high acceleration, fast response speed, precise displacement and low price, the automatic focusing function of the voice coil motor is still the most cost-effective solution for the automatic focusing device of the camera. By fixing the optical lens on the voice coil motor drive carrier, the carrier serves as the power unit for lens movement, and the voice coil motor carrier and the housing are connected by an elastic structure, when the motor is powered on, the carrier will move linearly along the optical axis of the lens, thereby realizing the automatic focusing function. At present, the existing anti-shake solutions of mobile camera equipment can only balance the horizontal jitter of the lens in the voice coil motor. In actual high-end camera equipment, in addition to the horizontal jitter, there will be rotation around the vertical axis (Z axis), that is, rotation around the optical axis. At this time, when imaging, although the center position imaging can maintain a certain clarity, the outside of the center will be blurred due to rotation. However, the existing technology has limited effect of anti-shake by adjusting the lens position, which has become a difficult problem that needs to be solved urgently for mobile cameras. Summary of the invention

[0003] The purpose of the present invention is to provide a three-axis shift anti-shake gimbal for a miniature camera with a compact structure and reliable use, aiming to solve the problem in the prior art that blurry images caused by lens shaking and rotation in multiple directions cannot be eliminated, thereby greatly improving the imaging quality and meeting the needs of high-end photography.

[0004] The technical solution adopted by the present invention is:

[0005] A three-axis shift anti-shake gimbal for a miniature camera, the technical key points of which are: comprising a gimbal base, a sealing carrier that is buckled with the gimbal base to form a moving space for a moving part group, and a first carrier and a second carrier stacked in the moving space for the moving part group; the sealing carrier is further used to connect a voice coil motor and the gimbal, and a light-through hole corresponding to a lens module in the voice coil motor is provided in the middle of its upper surface and a filter is fixed; the bottom surface of the gimbal base is provided with a lower magnetic conductive metal plate group, an X-direction drive coil group, a Y-direction drive coil group, a Y-direction position sensing element located on the side of the X-direction drive coil group, and an X-direction position sensing element located on the side of the Y-direction drive coil group; a photosensitive chip facing the filter is fixed on the upper surface of the first carrier, and an upper magnetic conductive metal plate is fixed on the lower surface plate group, a driving coil rotating around the Z axis and a rotation position sensing element; the second carrier is located between the gimbal base and the first carrier, and a magnet group corresponding to the upper magnetic conductive metal plate group and the lower magnetic conductive metal plate group is provided on the second carrier. The second carrier is attracted to the first carrier and the gimbal base through the magnetic attraction of the magnet group, and a first ball support structure is provided between the first carrier and the second carrier, and a second ball support structure and a spring reset structure are provided between the second carrier and the gimbal base; a flexible circuit board arranged around the photosensitive chip is also bonded to the first carrier, and the flexible circuit board provides a reset force for the first carrier and is electrically connected to the external connection boards of the photosensitive chip and the voice coil motor respectively, so that the imaging acquisition data of the photosensitive chip establishes communication with the mobile terminal device.

[0006] The above-mentioned micro camera three-axis shift anti-shake gimbal, the magnet group is built into the second carrier, which is composed of X positive magnets and X negative magnets arranged at intervals along the X-axis direction, and Y positive magnets and Y negative magnets arranged at intervals along the Y direction. The upper magnetic conductive metal plate group and the lower magnetic conductive metal plate group are respectively built into the first carrier and the gimbal base, the upper magnetic conductive metal plate group is composed of upper magnetic conductive metal plates corresponding to the magnets of the magnet group one by one, and the lower magnetic conductive metal plate group is composed of lower magnetic conductive metal plates corresponding to the magnets of the magnet group one by one.

[0007] In the above-mentioned micro camera three-axis shift anti-shake gimbal, the X-direction driving coil group on the gimbal base is composed of an X-direction positive driving coil located between the X-direction positive magnet and the lower magnetic metal plate, and an X-direction negative driving coil located between the X-direction negative magnet and the lower magnetic metal plate; the Y-direction positive driving coil on the gimbal base is composed of a Y-direction positive driving coil located between the Y-direction positive magnet and the lower magnetic metal plate, and a Y-direction negative driving coil located between the Y-direction negative magnet and the lower magnetic metal plate.

[0008] In the above-mentioned micro camera three-axis shift anti-shake gimbal, the rotation drive coil around the Z axis on the first carrier is composed of four rotation drive coils evenly distributed around the Z axis, and each rotation drive coil is located between the X positive magnet, the X negative magnet, the Y positive magnet, the Y negative magnet and the corresponding upper magnetic conductive metal plate.

[0009] In the above-mentioned three-axis shift anti-shake gimbal for a micro camera, the first ball support structure includes a plurality of balls I, and the lower surface of the first carrier and the upper surface of the second carrier are respectively provided with ball slide rails I corresponding one to one with the balls I, and the ball slide rails I are arc-shaped rails, and the ball slide rails I are evenly arranged around the Z axis.

[0010] In the above-mentioned three-axis shift anti-shake gimbal for miniature cameras, the second ball bearing support structure includes a plurality of balls II, and the lower surface of the second carrier and the upper surface of the gimbal base are respectively provided with ball bearing rails II corresponding one to one with the balls II, and the ball bearing rails II are circular pits.

[0011] The above-mentioned micro camera three-axis shift anti-shake gimbal, the spring reset structure is composed of a plurality of outer frame parts arranged at intervals for connecting to the top surface of the side retaining wall of the gimbal base, a plurality of inner frame parts arranged at intervals for connecting to the edge of the second carrier, and an elastic connecting part connected between adjacent outer frame parts and inner frame parts.

[0012] The above-mentioned three-axis shift anti-shake gimbal for a micro camera has a metal strip built into the gimbal base to increase strength. The X-axis drive coil group, Y-axis drive coil group, X-axis position sensing element and Y-axis position sensing element on the gimbal base are electrically connected to the external connection board of the voice coil motor through the metal strip.

[0013] The above-mentioned three-axis shift anti-shake gimbal for a micro camera has an upper surface of the sealing carrier provided with an avoidance groove for mounting an external connecting plate of a voice coil motor, and a metal embedding part is built into the sealing carrier as a pad for welding to the pins of the voice coil motor.

[0014] The beneficial effects of the present invention are:

[0015] 1. The first carrier, the second carrier, the X-axis drive coil group, the Y-axis drive coil group and the Z-axis rotation drive coil structure are used to achieve two degrees of freedom in the horizontal X-axis and Y-axis and a single degree of freedom in the Z-axis rotation to achieve anti-shake, so that the motor can perform corresponding jitter compensation in both the horizontal direction and the Z-axis rotation direction, achieving the purpose of three-axis anti-shake. Due to the use of the technical means of the photosensitive chip, the photosensitive chip is fixed to the first carrier as a whole, and moves horizontally or rotationally with the first carrier. After being used in conjunction with the voice coil motor, the ability to compensate for jitter is stronger, making the photosensitive chip stable when imaging, making the mobile terminal camera clearer and more stable, and effectively improving the camera capability of the mobile terminal device.

[0016] 2. The magnet group cooperates with the upper magnetic metal plate group and the lower magnetic metal plate group to realize the first carrier, the second carrier and the pan-tilt base being sucked together as one. At the same time, the first ball support structure is adopted to ensure that the first carrier can rotate relative to the second carrier, and the second ball support structure is adopted to ensure that the second carrier drives the first carrier to move horizontally relative to the pan-tilt base. The magnet group also has the function of assisting the first carrier and the second carrier to reset.

[0017] 3. A spring reset structure is used to enable the second carrier to reset smoothly after moving relative to the pan / tilt base. In addition to the signal transmission function, the flexible circuit board can also enable the first carrier to reset smoothly after rotating relative to the second carrier.

[0018] 4. The horizontal displacement of the second carrier (as well as the first carrier and the photosensitive chip) relative to the pan / tilt base is sensed by the X-axis position sensing element and the Y-axis position sensing element, and the rotational displacement of the first carrier (as well as the photosensitive chip) relative to the second carrier is sensed by the rotational position sensing element, and an electrical signal is fed back to facilitate real-time adjustment of the drive current in the X-axis drive coil group, the Y-axis drive coil group and the drive coil rotating around the Z axis, thereby realizing closed-loop control and significantly improving control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded view of the present invention;

[0020] Figure 2 It is a schematic diagram of the relative positions of the magnet group, the upper and lower magnetic conductive metal plate groups, the X-direction and Y-direction drive coil groups and the Z-axis rotation drive coil of the present invention;

[0021] Figure 3 It is a schematic diagram of the Z-axis rotation anti-shake structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the X-axis and Y-axis translation anti-shake structure of the present invention.

[0023] In the figure: 1. filter, 2. sealing carrier, 3. photosensitive chip, 4. upper magnetic conductive metal plate group, 401. upper magnetic conductive metal plate, 5. rotation position sensing element, 6. Z-axis rotation drive coil, 601. rotation drive coil, 7. first carrier, 8. flexible circuit board, 9. first ball support structure, 901. ball slide rail I, 10. magnet group, 1001. X positive magnet, 1002. Y positive magnet, 1003. X negative magnet, 1004. Y negative magnet, 11. second carrier, 12. spring reset structure, 13. X-direction drive coil group, 14. Y-direction position sensing element, 15. Y-direction drive coil group, 16. lower magnetic conductive metal plate group, 1601. lower magnetic conductive metal plate, 17. second ball support structure, 1701. ball slide rail II, 18. pan / tilt base, 19. X-direction position sensing element. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear and explicit, the present invention is further described in detail.

[0025] like Figure 1-Figure 4 As shown, the micro camera three-axis shift anti-shake gimbal includes a gimbal base 18, a sealing carrier 2 that is buckled with the gimbal base 18 to form a moving space for a moving part group, and a first carrier 7 and a second carrier 11 stacked in the moving space for the moving part group.

[0026] The sealing carrier 2 is also used to connect the voice coil motor and the pan-tilt head. The middle of its upper surface is provided with a light hole corresponding to the lens module in the voice coil motor and fixes the filter 1. The bottom surface of the pan-tilt head base 18 is provided with a lower magnetic metal plate group 16, an X-axis drive coil group 13, a Y-axis drive coil group 15, a Y-axis position sensing element 14 located on the side of the X-axis drive coil group 13, and an X-axis position sensing element 19 located on the side of the Y-axis drive coil group 15. The upper surface of the first carrier 7 is fixed with a photosensitive chip 3 facing the filter 1, and the lower surface is fixed with an upper magnetic metal plate group 4, a rotation drive coil 6 around the Z axis, and a rotation position sensing element 5. The second carrier 11 is located between the pan-tilt base 18 and the first carrier 7. The second carrier 11 is provided with a magnet group 10 corresponding to the upper magnetic conductive metal plate group 4 and the lower magnetic conductive metal plate group 16. The second carrier 11 is attracted to the first carrier 7 and the pan-tilt base 18 by the magnetic attraction of the magnet group 10. A first ball bearing support structure 9 is provided between the first carrier 7 and the second carrier 11. A second ball bearing support structure 17 and a spring reset structure 12 are provided between the second carrier 11 and the pan-tilt base 18. A flexible circuit board 8 arranged around the photosensitive chip 3 is also bonded to the first carrier 7. The flexible circuit board 8 provides a reset force for the first carrier 7 and is electrically connected to the external connection board (omitted in the figure) of the photosensitive chip 3 and the voice coil motor, respectively, so that the imaging acquisition data of the photosensitive chip 3 can establish communication with the mobile terminal device.

[0027] In this embodiment, the photosensitive chip 3 and the first carrier 7 are fixed by welding, bonding and mechanical fixing. The flexible circuit board 8 has a specific L-shaped multiple bending structure. The magnet group 10 is built into the second carrier 11, which is composed of X positive magnets 1001 and X negative magnets 1003 arranged at intervals along the X-axis direction, and Y positive magnets 1002 and Y negative magnets 1004 arranged at intervals along the Y direction. The upper magnetic conductive metal plate group 4 and the lower magnetic conductive metal plate group 16 are respectively built into the first carrier 7 and the pan-tilt base 18. The upper magnetic conductive metal plate group 4 is composed of upper magnetic conductive metal plates 401 corresponding to the magnets of the magnet group 10 one by one, and the lower magnetic conductive metal plate group 16 is composed of lower magnetic conductive metal plates 1601 corresponding to the magnets of the magnet group 10 one by one. The X-direction driving coil group 13 on the pan-tilt base 18 is composed of an X-direction driving coil located between the X-direction positive magnet 1001 and the lower magnetic conductive metal plate 1601, and an X-direction negative driving coil located between the X-direction negative magnet 1003 and the lower magnetic conductive metal plate 1601; the Y-direction positive driving coil 15 on the pan-tilt base 18 is composed of a Y-direction positive driving coil located between the Y-direction positive magnet 1002 and the lower magnetic conductive metal plate 1601, and a Y-direction negative driving coil located between the Y-direction negative magnet 1004 and the lower magnetic conductive metal plate 1601. The Z-axis rotating driving coil 6 on the first carrier 7 is composed of four rotating driving coils 601 evenly distributed around the Z axis, and each rotating driving coil 601 is located between the X-direction positive magnet 1001, the X-direction negative magnet 1003, the Y-direction positive magnet 1002, the Y-direction negative magnet 1004 and the corresponding upper magnetic conductive metal plate 401.

[0028] See also Figure 2 , the X positive magnet 1001, the X negative magnet 1003, the Y positive magnet 1002, and the Y negative magnet 1004 are located in the middle, and the coils and the magnetic metal plates are arranged outward in sequence; this structural arrangement has the following advantages: (1) the coils on the first carrier 7 and the pan-tilt base 18 share a group of magnets, making the overall structure more compact and effectively avoiding the mutual influence between the two groups of magnets; (2) the upper and lower magnetic metal plates are respectively arranged on the first carrier 7 and the pan-tilt base 18, which can effectively improve the magnetic field strength where the coils are located; (3) the upper and lower magnetic metal plates are respectively arranged on the first carrier 7 and the pan-tilt base 18 (4) The upper and lower magnetic conductive metal plates are respectively arranged on the first carrier 7 and the pan-tilt base 18. After the first carrier 7 and the pan-tilt base 18 are relatively displaced relative to the second carrier 11, auxiliary reset can be performed under the action of magnetic attraction; (5) The magnet is located in the middle position, which can provide a magnetic field for the X-axis position sensing element 19, the Y-axis position sensing element 14 and the rotational position sensing element 5 respectively located on the first carrier 7 and the pan-tilt base 18, so that the sensing components can accurately sense the relative horizontal displacement or rotational displacement.

[0029] The first ball bearing support structure 9 includes a plurality of balls I. The lower surface of the first carrier 7 and the upper surface of the second carrier 11 are respectively provided with ball bearing rails I 901 corresponding to the balls I. The ball bearing rails I 901 are arc-shaped rails, and each ball bearing rail I is evenly arranged around the Z axis. The second ball bearing support structure 17 includes a plurality of balls II. The lower surface of the second carrier 11 and the upper surface of the pan-tilt base 18 are respectively provided with ball bearing rails II 1701 corresponding to the balls II. The ball bearing rails II 1701 are circular pits. The spring reset structure 12 is composed of a plurality of outer frame parts arranged at intervals for connecting to the top surface of the side retaining wall of the pan-tilt base 18, a plurality of inner frame parts arranged at intervals for connecting to the edge of the second carrier 11, and an elastic connection part connected between adjacent outer frame parts and inner frame parts. The fixing methods of the outer frame part and the pan-tilt base, and the inner frame part and the second carrier include bonding and riveting. The spring reset structure 12 automatically resets the second carrier 11 after it moves relative to the pan / tilt base 18, and at the same time has a pre-tightening force on the second carrier in the vertical direction of the pan / tilt, thereby enhancing the fit between the second carrier 11 and the pan / tilt base 18. The upper surface of the second carrier 11 is provided with an avoidance space structure corresponding to the relative movement position of the first carrier 7 to avoid affecting the rotation of the first carrier 7; the upper surface of the pan / tilt base 18 is provided with an avoidance space structure corresponding to the relative movement position of the second carrier 11 to avoid affecting the horizontal movement of the second carrier 11.

[0030] See also Figure 3 When the rotation position sensing element 5 senses that the first carrier 7 rotates relative to the second carrier 11 in the Z-axis direction, the rotation position sensing element 5 sends out an electrical signal in real time to adjust the current in the four rotation drive coils 601, overcome the attraction of the X positive magnet 1001, the X negative magnet 1003, the Y positive magnet 1002, and the Y negative magnet 1004 to the upper magnetic conductive metal plate 401 and the restraint force of the flexible circuit board 8, so that the first carrier 7 can stably perform rotation compensation movement around the Z-axis under the joint action of the electromagnetic force generated by the rotation drive coil 601 and the first ball support structure 9, thereby realizing closed-loop anti-shake control around the Z-axis direction.

[0031] See also Figure 4When the Y-axis position sensing element 14 and the X-axis position sensing element 19 on the pan-tilt base 18 sense that the second carrier 11 moves horizontally relative to the pan-tilt base 18, the Y-axis position sensing element 14 and the X-axis position sensing element 19 send out electrical signals in real time to adjust the currents in the X-axis drive coil group 13 and the Y-axis drive coil group 15, so as to overcome the stress of the spring reset structure 12, the attraction of the X positive magnet 1001, the X negative magnet 1003, the Y positive magnet 1002, and the Y negative magnet 1004 to the lower magnetic conductive metal plate 1601, and the restraint force of the flexible circuit board 8, so that the second carrier 11 can perform stable compensation movement with two degrees of freedom in the horizontal direction under the joint action of the electromagnetic force generated by the X-axis drive coil group 13 and the Y-axis drive coil group 15 and the second ball support structure 17, thereby realizing two-degree-of-freedom closed-loop anti-shake control.

[0032] When the above-mentioned rotating driving coil 601 is not energized, the attractive force generated by the X positive magnet 1001, the X negative magnet 1003, the Y positive magnet 1002, and the Y negative magnet 1004 will reach a balance with the supporting force provided by the first ball support structure 9, preventing the ball I from escaping from the ball slide rail I901, thereby providing constraints on the first carrier 7, so that the first carrier 7 remains stable and avoids displacement; when the X-direction driving coil group 13 and the Y-direction driving coil group 15 are not energized, the attractive force generated by the X positive magnet 1001, the X negative magnet 1003, the Y positive magnet 1002, and the Y negative magnet 1004 will reach a balance with the supporting force provided by the second ball support structure 17, preventing the ball II from escaping from the ball slide rail II1701.

[0033] The pan-tilt base 18 has a built-in metal strip (omitted in the figure) for increasing strength. The X-direction drive coil assembly 13, the Y-direction drive coil assembly 15, the X-direction position sensing element 19 and the Y-direction position sensing element 14 on the pan-tilt base 18 are electrically connected to the external connection board of the voice coil motor through the metal strip. The upper surface of the sealing carrier 2 is provided with an avoidance groove for installing the external connection board of the voice coil motor. The avoidance groove and the external connection board are interlocked and bonded together. The sealing carrier 2 has a built-in metal insert as a pad for welding with the pins of the voice coil motor.

[0034] The above embodiments of the present invention are described in detail, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of this patent.

Claims

1. A three-axis shift anti-shake gimbal for a miniature camera, characterized by: The invention comprises a pan-tilt base, a sealing carrier which is buckled with the pan-tilt base to form a moving space of a moving part group, a first carrier and a second carrier which are stacked in the moving space of the moving part group; the sealing carrier is further used to connect the voice coil motor and the pan-tilt, and a light-through hole corresponding to the lens module in the voice coil motor is provided in the middle of its upper surface and a filter is fixed; the bottom surface of the pan-tilt base is provided with a lower magnetic conductive metal plate group, an X-axis driving coil group, a Y-axis driving coil group, a Y-axis position sensing element located on the side of the X-axis driving coil group, and an X-axis position sensing element located on the side of the Y-axis driving coil group; a photosensitive chip facing the filter is fixed on the upper surface of the first carrier, and an upper magnetic conductive metal plate group, a driving coil rotating around the Z axis and Rotational position sensing element; the second carrier is located between the gimbal base and the first carrier, and a magnet group corresponding to the upper magnetic conductive metal plate group and the lower magnetic conductive metal plate group is provided on the second carrier. The second carrier is attracted to the first carrier and the gimbal base by the magnetic attraction of the magnet group. A first ball bearing support structure is provided between the first carrier and the second carrier, and a second ball bearing support structure and a spring reset structure are provided between the second carrier and the gimbal base; a flexible circuit board arranged around the photosensitive chip is also bonded to the first carrier, and the flexible circuit board provides a reset force for the first carrier and is electrically connected to the external connection boards of the photosensitive chip and the voice coil motor, respectively, so that the imaging acquisition data of the photosensitive chip establishes communication with the mobile terminal device; The upper surface of the sealing carrier is provided with an avoidance groove for installing the external connection plate of the voice coil motor. A metal embedding part is built into the sealing carrier as a pad for welding with the voice coil motor pin; the flexible circuit board has an L-shaped multiple bending structure.

2. The three-axis shift anti-shake gimbal for a miniature camera according to claim 1, characterized in that: The magnet group is built into the second carrier, and is composed of an X positive magnet and an X negative magnet arranged at intervals along the X-axis direction, and a Y positive magnet and a Y negative magnet arranged at intervals along the Y direction. The upper magnetic conductive metal plate group and the lower magnetic conductive metal plate group are respectively built into the first carrier and the pan / tilt base, the upper magnetic conductive metal plate group is composed of upper magnetic conductive metal plates corresponding to the magnets of the magnet group one by one, and the lower magnetic conductive metal plate group is composed of lower magnetic conductive metal plates corresponding to the magnets of the magnet group one by one.

3. The three-axis shift anti-shake gimbal for a miniature camera according to claim 2, characterized in that: The X-direction driving coil group on the gimbal base is composed of an X-direction driving coil located between the X-direction positive magnet and the lower magnetic conductive metal plate, and an X-direction negative driving coil located between the X-direction negative magnet and the lower magnetic conductive metal plate; the Y-direction positive driving coil on the gimbal base is composed of a Y-direction positive driving coil located between the Y-direction positive magnet and the lower magnetic conductive metal plate, and a Y-direction negative driving coil located between the Y-direction negative magnet and the lower magnetic conductive metal plate.

4. The three-axis shift anti-shake gimbal for a miniature camera according to claim 2, characterized in that: The Z-axis rotating drive coil on the first carrier is composed of four rotating drive coils evenly distributed around the Z axis, and each rotating drive coil is located between the X positive magnet, the X negative magnet, the Y positive magnet, the Y negative magnet and the corresponding upper magnetic conductive metal plate.

5. The three-axis shift anti-shake gimbal for a miniature camera according to claim 1, characterized in that: The first ball support structure includes a plurality of balls I. The lower surface of the first carrier and the upper surface of the second carrier are respectively provided with ball slide rails I corresponding to the balls I one by one. The ball slide rails I are arc-shaped rails, and the ball slide rails I are evenly arranged around the Z axis.

6. The three-axis shift anti-shake gimbal for a miniature camera according to claim 1, characterized in that: The second ball support structure includes a plurality of balls II, and the lower surface of the second carrier and the upper surface of the pan / tilt base are respectively provided with ball slide rails II corresponding to the balls II one by one, and the ball slide rails II are circular pits.

7. The three-axis shift anti-shake gimbal for a miniature camera according to claim 1, characterized in that: The spring reset structure consists of a plurality of spaced-apart outer frame portions connected to the top surface of the side retaining wall of the gimbal base, a plurality of spaced-apart inner frame portions connected to the edge of the second carrier, and an elastic connection portion connected between adjacent outer frame portions and inner frame portions.

8. The three-axis shift anti-shake gimbal for a miniature camera according to claim 1, characterized in that: The pan-tilt base has a built-in metal strip for increasing strength, and the X-direction drive coil group, Y-direction drive coil group, X-direction position sensing element and Y-direction position sensing element on the pan-tilt base are electrically connected to the external connection board of the voice coil motor through the metal strip.

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