CN212251812U

CN212251812U - Magnetic suction anti-shake cradle head structure

Info

Publication number: CN212251812U
Application number: CN202020699428.0U
Authority: CN
Inventors: 麦练智
Original assignee: Vista Innotech Ltd
Current assignee: Vista Innotech Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-12-29
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to the field of anti-shake tripod heads, in particular to a magnetic anti-shake tripod head structure, which comprises an inner pedestal body and an outer pedestal body; the inner seat body is provided with a positioning magnet and at least three limiting surfaces positioned on the same spherical surface, and the at least three limiting surfaces are arranged around the positioning magnet; the outer seat body is provided with a magnetic conduction component and a plurality of balls which are rotationally connected with the outer seat body, and the magnetic conduction component and the positioning magnet are oppositely arranged; the position of at least three ball and the position one-to-one of at least three spacing face, the location magnetite attracts the magnetic conduction part so that the ball butt in spacing face, and a plurality of spacing personally submit the triangle-shaped and arrange around the location magnetite and can cooperate the ball to support to interior pedestal, and the location magnetite not only can ensure that outer pedestal and interior pedestal pass through the ball rotation to the attraction of magnetic conduction part and link to each other, and this kind of design is less sensitive to the manufacturing error of anti-shake cloud platform moreover, and the influence of manufacturing error to its anti-shake performance is lower.

Description

Magnetic suction anti-shake cradle head structure

Technical Field

The utility model relates to an anti-shake cloud platform field especially relates to an anti-shake cloud platform structure is inhaled to magnetism.

Background

In recent years, small-sized mobile devices with shooting functions are quite popular, and the application range is also continuously expanded, including aerial photography, motion cameras and automobile data recorders. The device comprises at least one Compact camera module (Compact camera module). Therefore, the market of the module is huge, and the growth is steadily promoted.

When taking pictures and films, the pictures and films taken by the device are likely to be blurred or shaken by external vibration, which affects the quality of the pictures and films. This problem is exacerbated when the vibrations are relatively intense, or in low light conditions.

In order to solve the above problems, many small-sized anti-shake technologies have appeared on the market. Among them, the effect of improving the picture quality is most excellent by mechanically compensating for the blurring and shaking of the image due to the vibration. The mechanical method may be to translate a set of lenses by an anti-shake actuator (refer to patents CN104204934A, US20140333784a1), or to rotate a set of lenses and an image sensor simultaneously (refer to patents CN102934021B, US9229244B2), to achieve an anti-shake effect. The second anti-shake effect using the rotary mechanical method is generally better than that of the first translational mechanical method, so the magnetic ball bearing structure of the multi-axis micro pan-tilt is mainly directed to the rotary method.

The rotary anti-shake actuator needs to have a multi-axis Rotational-Freedom (Rotational) mechanical structure, so as to achieve the movable effect of the lens, the image sensor and the like. Meanwhile, in order to alleviate the influence of external forces caused by acceleration in different directions or earth-core attraction on the movable structure in the actuator, the mechanical structure generally needs to be close to having no displacement Freedom (Translational dimensions-of-Freedom). In addition, a mechanical structure is required to have good fall resistance, and the mechanical structure must be able to withstand the fall risks that may occur when a small mobile device is normally used.

For the rotation type anti-shake camera module, the existing mechanical structure can be divided into two types. The first category (refer to patents: CN107450251A, CN208399865U) employs a plurality of inclined spring plates on a plurality of different planes, which achieve multi-axis rotational freedom and lower displacement freedom (higher displacement spring coefficient). The technology has the advantages that the non-linear friction force cannot occur in the anti-shaking process, and the effect of responding to the vibration which is relatively fine and the direction of which is frequently changed is better. In addition, the production process is simple and the cost is low.

The second category (refer to patents: CN106353950B, CN108693677A, CN108881697A and CN103513492A) achieves the required multi-axis rotational freedom degree through a multi-group contact structure. Each of said sets of contact structures generally comprises a plurality of movable balls (refer to patent: CN103513492A) or at least two immobile balls (refer to patent: CN106353950B) and is responsible for the rotational freedom of a shaft. The advantage of this technique is that the displacement spring coefficient is very high, so different attitude differences and the change in the direction of the earth's core suction cause less influence on the anti-shake performance.

Although the first type of prior art can provide multi-axis rotational freedom, the rotational spring coefficient is generally large, so that power consumption is large, and battery life is reduced. In addition, the displacement spring coefficient of the first prior art is lower than that of the second prior art, so that the influence on the anti-shake performance caused by different attitude differences and the change of the earth core suction direction is larger.

In the second prior art (refer to patent nos.: CN106338873B, CN109752863A), when the number of anti-shake shafts is plural, this kind of technology requires plural sets of contact structures and connection structures for connecting the plural sets of structures. In addition, the mechanical structure of the technology requires extremely high precision of parts and assembly. Especially, when the precision is insufficient and the error is too large, the friction force of the contact structure is too large, and the anti-shake performance and the power consumption are affected. Therefore, the mechanical structure of the technology is complex, more space is needed, the manufacturing process is difficult, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a magnetic absorption anti-shake pan-tilt structure to solve the problem that the coefficient of elasticity of the mechanical structure of present miniature anti-shake pan-tilt structure is higher and to manufacturing accuracy requirement is higher.

Based on this, the utility model provides a magnetic suction anti-shake tripod head structure, which comprises an inner seat body and an outer seat body;

the inner seat body is provided with a positioning magnet and at least three limiting surfaces positioned on the same spherical surface, and the at least three limiting surfaces are arranged around the positioning magnet;

the outer seat body is provided with a magnetic conduction component and a plurality of balls which are rotationally connected with the outer seat body, the magnetic conduction component and the positioning magnet are oppositely arranged,

the positions of the at least three balls correspond to the positions of the at least three limiting surfaces one to one, and the positioning magnets attract the magnetic conduction parts to enable the balls to abut against the limiting surfaces.

Preferably, the outer base body is provided with at least one limiting part, the outer side wall of the inner base body and the limiting part are arranged oppositely, and the outer side wall of the inner base body is further provided with a limit stop block adjacent to the limiting part.

Preferably, the limiting member and the magnetic conductive member are respectively located at two sides of the inner base.

Preferably, the plurality of limiting surfaces are respectively located on two sides of a reference plane, the reference plane is parallel to the image sensor on the inner base, and the center of the spherical surface is located on the reference plane.

Preferably, the outer seat body is provided with two sets of rolling assemblies, the two sets of rolling assemblies are respectively located on two sides of the magnetic conducting component, and the two balls of each set of rolling assemblies are respectively located on two sides of the reference plane.

Preferably, the outer seat body is further provided with a coil mounting seat, the coil mounting seat is provided with a mounting through hole, and the inner side wall of the mounting through hole is provided with at least one limiting bump for mounting a coil.

Preferably, the magnetic component also comprises a first magnetic component;

the first magnetic assembly comprises at least one group of first coils arranged on the outer seat body and at least one group of first magnetic assemblies arranged on the inner seat body and opposite to the first coils, and each first magnetic assembly comprises two first magnets arranged along the direction perpendicular to the image sensor on the inner seat body.

Preferably, the magnetic component also comprises a second magnetic component;

the second magnetic assembly comprises at least one group of second coils arranged on the outer seat body and at least one group of second magnetic assemblies arranged on the inner seat body and opposite to the second coils, and each second magnetic assembly comprises two second magnets arranged in the direction parallel to the image sensor on the inner seat body.

Preferably, the outer base body is provided with a retainer, the retainer is provided with one or more limiting grooves, and the balls are arranged in the limiting grooves and are rotationally connected with the limiting grooves.

Preferably, the outer base is provided with a yielding through hole, the magnetic conducting component and the ball are both located on the side of the yielding through hole, and the lens of the camera module on the inner base penetrates through the yielding through hole.

The utility model discloses a magnetic suction anti-shake cradle head structure, which comprises an inner seat body and an outer seat body; the inner seat body is provided with a positioning magnet and a plurality of limiting surfaces positioned on the same spherical surface, and at least three limiting surfaces are arranged around the positioning magnet; the outer seat body is provided with a magnetic conduction component and a plurality of balls which are rotationally connected with the outer seat body, and the magnetic conduction component and the positioning magnet are oppositely arranged; the position of at least three ball and the position one-to-one of at least three spacing face, the location magnetite attracts the magnetic conduction part so that the ball butt in spacing face, and a plurality of spacing faces are arranged around the location magnetite and can be cooperated the ball to support the internal pedestal, and the location magnetite not only can ensure that outer pedestal and internal pedestal pass through the ball rotation to link to each other to the attraction of magnetic conduction part, and this kind of design is less sensitive to the manufacturing error of anti-shake cloud platform moreover, and the influence of manufacturing error to its anti-shake performance is lower.

Drawings

Fig. 1 is a schematic view of the overall structure of a magnetic suction anti-shake pan/tilt structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an outer base of a magnetic suction anti-shake cradle head structure according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the holder of the magnetic suction anti-shake pan/tilt head structure according to the embodiment of the present invention;

fig. 4 is a schematic front view of an outer base of a magnetic suction anti-shake pan/tilt head structure according to an embodiment of the present invention;

3 FIG. 35 3 is 3a 3 schematic 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 34 3; 3

Fig. 6 is a schematic top view of the outer base of the magnetic suction anti-shake cradle head structure according to the embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view B-B of FIG. 6;

fig. 8 is a schematic cross-sectional view of a magnetic suction anti-shake pan/tilt head structure according to an embodiment of the present invention;

FIG. 9 is an enlarged schematic view of region C of FIG. 8;

fig. 10 is an explosion diagram of the magnetic anti-shake tripod head structure according to the embodiment of the present invention.

Wherein, 1, an outer seat body; 11. a magnetic conductive member; 12. a ball bearing; 13. a limiting member; 14. a coil mounting seat; 141. a limiting bump; 15. a first coil; 16. a second coil; 17. a holder; 171. a limiting groove; 18. a yielding through hole; 2. an inner seat body; 21. positioning a magnet; 22. A limiting surface; 23. a limit stop block; 24. a first magnet; 25. a second magnet; 3. an image sensor; 4. cloud platform shell.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

With reference to fig. 1 to 10, the magnetic suction anti-shake cradle head structure of the present invention is schematically shown, comprising an inner base 2 and an outer base 1.

As shown in fig. 5, the inner housing 2 is provided with a positioning magnet 21 and at least three limiting surfaces 22 located on the same spherical surface, the at least three limiting surfaces 22 are arranged around the positioning magnet 21 in a triangular shape, and the positioning magnet 21 is a magnet.

Referring to fig. 2 and 3, the outer base 1 has a receiving cavity, the inner base 2 is disposed in the receiving cavity, the outer base 1 is provided with a magnetic conducting member 11 and a plurality of balls 12 rotatably connected to the outer base 1, and the magnetic conducting member 11 can be made of metal material, such as steel. As shown in fig. 8 and 9, the magnetic conductive member 11 and the positioning magnet 21 are disposed to face each other. The outer seat body 1 is provided with an abdicating through hole 18, the magnetic conduction component 11 and the ball 12 are both positioned on the side of the abdicating through hole 18, and the lens of the camera module is arranged through the abdicating through hole 18.

The positions of the at least three balls 12 correspond to the positions of the at least three limiting surfaces 22 one by one, and the positioning magnet 21 attracts the magnetic conductive member 11 to make the balls 12 abut against the limiting surfaces 22, so that the outer seat body 1 and the inner seat body 2 can be rotatably connected through the balls 12. Besides the positioning magnet 21 is used for ensuring that the outer seat body 1 and the inner seat body 2 are connected through the ball 12, the design is less sensitive to the manufacturing error of the anti-shake tripod head, and the influence of the manufacturing error on the anti-shake performance is lower. Therefore, the anti-shake cradle head does not need high part precision and assembly precision, can realize the anti-shake function by adopting a simpler structure, and greatly reduces the manufacturing cost and the manufacturing difficulty.

As shown in fig. 5, in order to prevent the inner seat body 2 and the outer seat body 1 from being damaged due to excessive rotation, at least one limiting piece 13 is disposed on the outer seat body 1, the outer sidewall of the inner seat body 2 and the limiting piece 13 are disposed opposite to each other, and a limiting stop 23 disposed adjacent to the limiting piece 13 is further disposed on the outer sidewall of the inner seat body 2, when the rotation angle of the inner seat body 2 and the outer seat body 1 is about to exceed a limited angle, the limiting piece 13 abuts against the limiting stop 23 to prevent the inner seat body 2 and the outer seat body 1 from continuing to rotate, and the limiting piece 13 and the magnetic conducting component 11 are disposed on two sides.

The plurality of limiting surfaces 22 are respectively located on two sides of a reference plane, the reference plane is parallel to the image sensor 3 on the inner base body 2, the center of the spherical surface is located on the reference plane, the positions of the plurality of balls 12 correspond to the positions of the plurality of limiting surfaces 22 one by one, and each ball 12 abuts against one limiting surface 22.

In some optional embodiments, two sets of rolling assemblies are disposed on the outer seat 1, the two sets of rolling assemblies are respectively located at two sides of the magnetic conductive component 11, and the two balls 12 of each set of rolling assemblies are respectively located at two sides of the reference plane.

As shown in fig. 10, the outer base 1 is further provided with a coil mounting base 14, the coil mounting base 14 is provided with a mounting through hole, the inner side wall of the mounting through hole is provided with at least one limiting bump 141 for mounting a coil, and the inner base 2 is located in the mounting through hole.

The magnetic type miniature anti-shake tripod head also comprises a tripod head shell 4, wherein the outer seat body 1 is arranged in the tripod head shell 4, the outer seat body 1, the retainer 17, the coil seat on the outer seat body 1 and the coil on the coil seat form a fixed structure, and the inner seat body 2, the magnet on the inner seat body 2 and the camera module form a movable structure. Therefore, the fixed part of the elastic support is connected with the fixed structure, the movable part of the elastic support is connected with the movable structure, and the elastic support is provided with an electric conductor for realizing the electric connection between the movable structure and the fixed structure, thereby realizing the signal transmission, such as electrically connecting the image sensor 3 to a main board outside the tripod head.

Wherein, the retainer 17 on the outer seat body 1 is provided with one or more limiting grooves 171, the balls 12 are arranged in the limiting grooves 171 and are rotationally connected with the limiting grooves 171, and the retainer 17 and the outer seat body 1 are preferably of an integrated structure.

The inner base body 2 is provided with at least one first magnetic component, the first magnetic component comprises two first magnets 24 which are arranged along the direction perpendicular to the image sensor 3 of the camera module, and the outer base body 1 is provided with a first coil 15 which is arranged opposite to the first magnets 24.

The inner base body 2 is provided with at least one second magnetic component, the second magnetic component comprises two second magnets 25 which are arranged along the direction parallel to the image sensor 3 of the camera module, and the outer base body 1 is provided with a second coil 16 which is arranged opposite to the second magnets 25. The first magnetic assemblies may be provided with two sets, and the arrangement direction of the two first magnets 24 of the first set of first magnetic assemblies is perpendicular to the arrangement direction of the two first magnets 24 of the second set of first magnetic assemblies, so as to realize the three-axis rotation motion of the inner base body 2. By changing the current of the coil (including the first coil 15 and the second coil 16), the electromagnetic force applied to the magnet in the movable structure can be changed, so that the inner base 2 can realize multi-axis movement around the rotation center, and when the multi-axis rotation direction of the inner base 2 is opposite to the multi-axis rotation direction of the outer base 1 from the outside but the amplitude is close to the outer base, the multi-axis anti-shake effect can be realized.

The beneficial effects of the utility model include:

1. improve the structure of the miniature cloud platform of current multiaxis, simple structure can support multiaxis motion and anti-shake, only needs at least three ball 12, and part and equipment error are lower to anti-shake performance and consumption influence moreover. Thus, the structure may be more advantageous in size, reliability and cost;

2. the anti-shake camera module adopting the magnetic anti-shake pan-tilt structure has smaller power consumption and volume;

3. adopt the anti-shake camera module of anti-shake tripod head structure is inhaled to magnetism is poor and the anti-shake performance of earth's heart suction side is more unanimous at different attitudes, and the anti-shake performance is more reliable.

To sum up, the magnetic suction anti-shake cradle head structure of the utility model comprises an inner seat body 2 and an outer seat body 1; the inner seat body 2 is provided with a positioning magnet 21 and at least three limiting surfaces 22 positioned on the same spherical surface, and the at least three limiting surfaces 22 are arranged around the positioning magnet 21; the outer seat body 1 is provided with a magnetic conducting component 11 and a plurality of balls 12 which are rotatably connected with the outer seat body 1, and the magnetic conducting component 11 and the positioning magnet 21 are oppositely arranged; the positions of at least three balls 12 correspond to the positions of at least three limiting surfaces 22 one by one, the positioning magnet 21 attracts the magnetic conduction part 11 to enable the balls 12 to abut against the limiting surfaces 22, the at least three limiting surfaces 22 are triangular and are arranged around the positioning magnet 21 to be matched with the balls 12 to support the inner base body 2, the attraction of the positioning magnet 21 to the magnetic conduction part 11 can ensure that the outer base body 1 and the inner base body 2 are rotationally connected through the balls 12, the design is insensitive to the manufacturing error of the anti-shaking cradle head, and the influence of the manufacturing error on the anti-shaking performance is low.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic suction anti-shake pan-tilt structure is characterized by comprising an inner seat body and an outer seat body;

2. The magnetic suction anti-shake tripod head structure according to claim 1, wherein the outer base is provided with at least one limiting member, the outer sidewall of the inner base is opposite to the limiting member, and the outer sidewall of the inner base is further provided with a limiting stop disposed adjacent to the limiting member.

3. The magnetic suction anti-shake tripod head structure according to claim 2, wherein the position-limiting member and the magnetic conductive member are respectively located at two sides of the inner base.

4. The magnetic suction anti-shake tripod head structure according to claim 1, wherein the plurality of limiting surfaces are respectively located at two sides of a reference plane, the reference plane is parallel to the image sensor on the inner base, and the center of the spherical surface is located at the reference plane.

5. The magnetic suction anti-shake tripod head structure according to claim 4, wherein two sets of rolling assemblies are disposed on the outer base, the two sets of rolling assemblies are respectively disposed on two sides of the magnetic conductive member, and the two balls of each set of rolling assemblies are respectively disposed on two sides of the reference plane.

6. A magnetic suction anti-shake tripod head structure according to claim 1, wherein the outer base body is further provided with a coil mounting base, the coil mounting base is provided with a mounting through hole, and the inner side wall of the mounting through hole is provided with at least one limiting projection for mounting the coil.

7. The magnetic suction anti-shake holder structure according to claim 1, further comprising at least one first magnetic assembly;

8. The magnetic suction anti-shake pan-tilt structure according to claim 1, further comprising a second magnetic assembly;

9. The magnetic suction anti-shake tripod head structure according to claim 1, wherein the outer base is provided with a holder, the holder is provided with one or more limiting grooves, and the balls are disposed in the limiting grooves and rotatably connected with the limiting grooves.

10. The magnetic suction anti-shake pan/tilt head structure according to claim 1, wherein the outer base has a stepping through hole, the magnetic conductive member and the balls are located at the side of the stepping through hole, and the lens of the camera module on the inner base is inserted into the stepping through hole.