CN112731729A

CN112731729A - Anti-shake cradle head

Info

Publication number: CN112731729A
Application number: CN202110228779.2A
Authority: CN
Inventors: 彭坤; 林聪�; 刘富泉; 吕新科; 其他发明人请求不公开姓名
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-04-30

Abstract

The invention discloses an anti-shake tripod head, which comprises a shell, an upper frame, a lower frame, a bracket, balls, a magnet group, a circuit board and a base, wherein the magnet group is arranged on the side part of the upper frame and/or the lower frame; the circuit board is arranged on the shell; the rolling balls comprise a first group of rolling balls and a second group of rolling balls; the bracket is arranged between the upper frame and the lower frame and is provided with a first extension part and a second extension part, the first extension part is matched with the lower frame to install a first group of balls, and the second extension part is matched with the base to install a second group of balls; the underframe includes first bight and second bight and the leg joint portion that the interval set up, and the leg joint portion forms certain difference in height between first bight and second bight and makes the support more greatly rotate in first bight and second bight, because the leg joint portion is at the difference in height in first bight and second bight, the leg joint portion can more greatly rotate after in the leg joint portion to realize better anti-shake effect.

Description

Anti-shake cradle head

Technical Field

The invention relates to the field of cloud platforms, in particular to an anti-shaking cloud platform.

Background

In recent years, mobile devices having a fixed-focus wide-angle (viewing angle exceeding 80 degrees) shooting function have become popular, and the application range thereof has been expanding, including aerial photography, motion cameras, and automobile data recorders. When taking pictures and taking films, it is 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, a lot of existing anti-shake technologies have appeared on the market. The mainstream prior art achieves the effect of improving the image quality by reading the vibration sensors (such as gyroscope and acceleration sensor), calculating the vibration waveform and the required compensation angle, and compensating the image blur and shake caused by vibration by electronic, optical, or mechanical methods.

The prior art mainly includes an Electronic Image Stabilizer (EIS) and an Optical Image Stabilizer (OIS) according to a vibration compensation method.

EIS is an electronic method to achieve the anti-shake effect. During shooting, the EIS adjusts the position of each frame of image according to the calculated vibration waveform to counteract the image shake caused by vibration. The main advantage of EIS is low cost, no extra weight and volume, since EIS does not require additional actuators. The main disadvantage of EIS is that it cannot compensate for image shaking in each frame, since EIS counteracts image shaking due to vibration by adjusting the position of each image. Therefore, the image shot after the EIS is turned on is easy to blur due to image shaking. Another disadvantage of EIS is that the resolution of the image sensor is sacrificed. When the EIS is turned on, the image sensor or the image processor needs to cut out an appropriate image according to the calculated vibration waveform as a final image. During cropping, the resolution will decrease and the final image will have a lower resolution than the image, the sensor maximum. Therefore, EIS sacrifices the maximum resolution of the image sensor and reduces the image quality. The main disadvantage of OIS over EIS is the need for additional actuators, and therefore higher additional cost, more additional space, and higher additional weight.

OIS is an optical and mechanical method that uses an actuator to move an optical component (which may be one, one or all of the lenses of a camera) to achieve relative motion between the optical component and an image sensor, and to change the optical path (optical path) and the position of an imaging circle (ImageCircle) to counteract image shaking caused by vibration. Since the OIS is continuously compensated for taking each frame of image, it can counteract the jitter during exposure of each frame of image, and achieve better image quality than EIS. The main shortcoming of the existing OIS is that the anti-shake compensation angle is small, and therefore the OIS rotational motion angle cannot achieve a better anti-shake effect.

Disclosure of Invention

The invention aims to provide an anti-shake pan-tilt, which aims to solve the problem of small anti-shake compensation angle in the prior art.

In order to solve the above problems, the present invention provides an anti-shake tripod head, which includes a housing, an upper frame, a lower frame, a bracket, balls, a magnet assembly, a circuit board, and a base, wherein the magnet assembly is mounted on a side portion of the upper frame and/or the lower frame; the circuit board is arranged on the side part of the shell and is provided with a coil group to be matched with the magnet group; the balls comprise a first group of balls and a second group of balls; the bracket is installed between the upper frame and the lower frame and is provided with a first extension part and a second extension part which extend towards the corner of the lower frame, the first extension part is matched with the lower frame to install the first group of balls, and the second extension part is matched with the base to install the second group of balls; the lower frame comprises a first corner and a second corner which are arranged at intervals and a side part which is connected with the first corner and the second corner, the side part is provided with a bracket mounting part, a certain height difference is formed between the first corner and the second corner of the bracket, so that the bracket can rotate greatly at the first corner and the second corner, wherein the first corner is matched with the first extending part to mount the first group of balls, and the second corner is provided with an avoiding part to avoid the second extending part.

In one embodiment, the anti-shake tripod head further comprises a fixing frame, and the fixing frame is fixedly installed on the bracket to fix the motor.

In one embodiment, the first extension of the bracket is provided with a first upper ball groove opening downwards and the second extension of the bracket is provided with a second upper ball groove opening downwards, the lower frame is provided with a first lower ball groove opening upwards, the base is provided with a second lower ball groove opening upwards, the first upper ball groove of the bracket and the first lower ball groove of the lower frame cooperate to mount the first set of balls, and the second upper ball groove of the bracket and the second lower ball groove of the base cooperate to mount the second set of balls.

In one embodiment, the first upper ball groove, the second upper ball groove, the first lower ball groove, and the second lower ball groove are arc-shaped grooves having a radius greater than a radius of the balls, and a depth smaller than the radius of the balls.

In one embodiment, upper end surfaces of four side portions of the lower frame are recessed inward to form a bracket mounting portion, and the four side portions of the bracket mounting portion form inclined surfaces from high to low along a first corner portion to a second corner portion.

In one embodiment, a pair of spaced opposite corners of the base are provided with upwardly projecting lugs, and the second lower ball grooves are provided on the lugs.

In one embodiment, two adjacent side portions of the lower frame are respectively provided with a magnet mounting groove, the magnet groups comprise two groups of magnets and are respectively mounted in the magnet mounting grooves of the two adjacent side portions, two adjacent side portions of the housing are respectively provided with a circuit board avoiding portion, the circuit boards comprise a first circuit board and a second circuit board and are respectively mounted in the circuit board avoiding portions of the two adjacent side portions of the housing, and the first circuit board and the second circuit board are respectively provided with a coil group, wherein the coil group of the first circuit board is matched with the first group of magnets, and the coil group of the second circuit board is matched with the second group of magnets.

In one embodiment, sensors are further disposed in the coil sets of the first circuit board and the second circuit board, respectively.

In one embodiment, the upper frame is provided with a first limiting groove, the first extending part is provided with a first protruding part, the first protruding part is installed in the first limiting groove, and the opposite side of the first protruding part is provided with the first upper ball groove.

In one embodiment, the housing is provided with a second limiting groove, the second extending part is provided with a second protruding part, the second protruding part is installed in the second limiting groove, and the reverse side of the second protruding part is provided with the second upper ball groove.

The invention can drive the lower frame and the base to rotate relative to the motor by adjusting the current direction and the current magnitude of the coil group in the circuit board arranged in the shell and matching with the magnet group so as to counteract the shake generated by the motor, thereby realizing the anti-shake effect.

Drawings

Fig. 1 is an exploded perspective view of an anti-shake tripod head according to an embodiment of the present invention.

Fig. 2 is a perspective view of a housing of one embodiment of the present invention.

Fig. 3 is a bottom view of the housing of one embodiment of the present invention.

Fig. 4 is a top view of a circuit board escape on a housing according to one embodiment of the invention.

Fig. 5 is a perspective view of a circuit board of one embodiment of the present invention.

Fig. 6 is a perspective view of a stent according to one embodiment of the present invention.

Fig. 7 is a perspective view of a lower frame of one embodiment of the present invention.

Fig. 8 is a perspective view of a base of one embodiment of the present invention.

Figure 9 is a bottom view of the base and lower frame assembled in accordance with one embodiment of the present invention.

Fig. 10 is a bottom view of the assembled base, lower frame and magnet assembly, bracket, mounting frame and motor of one embodiment of the present invention.

Fig. 11 is a sectional view of the anti-shake tripod head according to an embodiment of the present invention, assembled along the first upper ball groove of the cradle.

Fig. 12 is a partially enlarged view of a portion a of fig. 11.

Fig. 13 is a sectional view of the anti-shake tripod head according to an embodiment of the present invention, assembled along a second upper ball groove of the cradle.

Fig. 14 is a partially enlarged view of a portion B of fig. 11.

Fig. 15 is a transverse cross-sectional view of the housing and circuit board, upper frame, mounting frame, bracket, lower frame and magnet pack, motor and base of one embodiment of the invention after assembly.

Fig. 16 is a vertical sectional view of the housing and circuit board, upper frame, mounting frame, bracket, lower frame and magnet pack, motor and base of one embodiment of the present invention after assembly.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The application relates to an anti-shake cloud platform, it is used for combining the camera lens module to use, realizes the effect of better anti-shake. Specifically, the lens module can have an OIS anti-shake function, and the cradle head drives the whole lens module comprising the lens and the image sensor to move in a direction opposite to the vibration direction but with an amplitude close to that of the lens module through a mechanical method so as to counteract the shake caused by the vibration. In the anti-shake process, because there is no relative motion between the optical component and the image sensor, the image quality and the anti-shake effect will not be reduced at the edge of the image, and there is no need to sacrifice the partial optical resolution of the lens and the partial resolution of the image sensor due to the anti-shake.

The anti-shake tripod head comprises a shell, an upper frame, a lower frame, a bracket, balls, a magnet group, a circuit board and a base, wherein the magnet group is arranged on the side part of the upper frame and/or the lower frame; the circuit board is arranged on the side part of the shell and is provided with a coil group to be matched with the magnet group; the rolling balls comprise a first group of rolling balls and a second group of rolling balls; the bracket is arranged between the upper frame and the lower frame and is provided with a first extending part and a second extending part which extend towards the corner of the lower frame, the first extending part is matched with the lower frame to install the first group of balls, and the second extending part is matched with the base to install the second group of balls; wherein the underframe is the rectangle frame, and the rectangle frame is equipped with the support mounting portion including the first bight and the second bight that the interval set up and the lateral part of connecting first bight and second bight, lateral part, and the support mounting portion forms certain difference in height between first bight and second bight, and wherein, first bight cooperates in order to install first group ball with first extension, and the second bight sets up dodges the portion and dodges in order to dodge the second extension. Because the difference in height of leg joint portion in first bight and second bight, leg joint portion can rotate by a relatively larger margin in the leg joint portion back to realize better anti-shake effect.

Embodiments of the present application are described below with reference to the drawings.

Fig. 1 is an exploded perspective view of an anti-shake tripod head according to an embodiment of the present invention, as shown in fig. 1, the anti-shake tripod head 1 includes a housing 10, an upper frame 20, a fixed frame 40, a bracket 50, balls 60, a lower frame 70, a magnet assembly 80, a circuit board 90, and a base 100. The bracket 50 is mounted on the lower frame 70, the fixing frame 40 is mounted on the bracket 50, the upper frame 20 is engaged with the lower frame 70 to limit the position of the bracket 50 and the fixing frame 40, the magnet group 80 is mounted on the side portions of the upper frame 20 and the lower frame 70, the circuit board 90 is mounted on the housing 10 and is engaged with the magnet group 80, the coil group 93 and the sensor 94 (see fig. 5) are disposed on the circuit board 90, and the upper frame 20, the motor 30, the fixing frame 40, the bracket 50, the balls 60, the lower frame 70, and the magnet group 80 are mounted in a space defined by the housing 10 and the base 100. It should be noted that although fig. 1 shows the motor 20, the motor 20 is not part of the anti-shake tripod head of the present invention, and the motor 20 is also referred to as an optical element driving device, which is used as a driving device of the optical module.

Fig. 2 is a perspective view of a housing according to an embodiment of the present invention, fig. 3 is a bottom view of the housing according to an embodiment of the present invention, and as shown in fig. 2 to 3, the housing 10 includes a cover 11 and a frame 12 fixedly connected to the cover 11, the cover 11 is a U-shaped frame with a downward opening (toward the base 100), one end of the U-shaped frame forms an open U-shaped opening, and the other end is fixedly connected to one side of the frame 12. After the housing 10 is assembled with the base 100, the cover 11 cooperates with the connecting line fixing portion 101 on the base 100 to form a protection space to protect the flexible connecting line 103 on the base 100. The frame body 12 is a rectangular frame including a first side portion 13, a second side portion 14, a third side portion 15 and a fourth side portion 16 which are opposite to each other in pairs, and has a hollow structure 17, the hollow structure 17 forms a space for mounting the components such as the inner case 10 and the motor 30 in cooperation with the base 102, and a circuit board escape portion 130 is provided on an outer side wall of the first side portion 13 and the second side portion 14 adjacent to the frame body 12 to fixedly mount the circuit board 90.

Fig. 4 is a side view of the housing 10 according to the embodiment of the present invention, which shows the circuit board relief portion 130 of the first side portion 13 of the frame 12, and as shown in fig. 2 and 4, the circuit board relief portion 130 includes a circuit board mounting portion 131, a communication mounting portion 132, a coil mounting portion 133, and an extension portion relief portion 135 that are integrally communicated with each other. The circuit board mounting portion 131 is a rectangular groove with an outward opening, a hollow coil mounting portion 133 is disposed in the middle of the rectangular groove, the circuit board 90 is embedded in the circuit board mounting portion 131, the coil assembly 93 and the sensor 94 are mounted on the coil mounting portion 133, and the bottom of the circuit board mounting portion 131 extends downward to form an extension portion avoiding portion 135 for accommodating the circuit board extension portion 95.

The communicating mounting portion 132 is also a groove that opens outward and has one end integrally communicating with the circuit board mounting portion 131 on the first side portion 13 and the other end communicating with the other communicating mounting portion 132 of the second side portion 14, that is, two circuit board mounting portions 131 are connected by two communicating mounting portions 132 on the first side portion 13 and the second side portion 14 which are integrally formed and used for mounting the circuit board communicating portion 92.

Two protrusions 136 are formed on the inner walls of the first and

second side portions

13 and 14, the two protrusions 136 are disposed on the upper and lower sides of the coil mounting portion 133, the length of the protrusion 136 is substantially equal to the length of the coil mounting portion 133, and the thickness of the protrusion 136 is at least equal to the height of the coil assembly 93 protruding from the inner wall of the first side portion 13 after being mounted on the coil mounting portion 133, so as to prevent the coil assembly 93 from directly contacting and wearing with the upper or lower case, etc.

The circuit board escape portion 130 of the second side portion 14 is substantially the same as the circuit board escape portion 130 of the first side portion 13, and includes a circuit board mounting portion 131, a communication mounting portion 132, and a hollow coil mounting portion 133, and the circuit board escape portion 130 of the first side portion 13 and the circuit board escape portion 130 of the second side portion 14 are integrally penetrated by the communication mounting portions 132 of the first side portion 13 and the second side portion 14 to form the integrally communicated circuit board escape portion 130.

Referring back to fig. 2 and 3, a first corner 134 is formed between the first side 13 and the second side 14 of the frame 12, a second corner 156 is formed between the third side 15 and the fourth side 16 of the frame 12, a support 120 is disposed inside the first corner 134 and the second corner 156, an upper surface of the support 120 away from the base is connected to tops of the first side 13 and the second side 14, a second limit groove 121 is disposed on a lower surface of the support 120 close to the base, the support 120 may be formed as a triangular flat plate, for example, the support 120 may be integrally formed with the frame 12 and may be shaped and sized not to affect the operation of the motor 30 in the frame 12, the second limit groove 121 is an arc-shaped groove having a radius substantially equal to an arc-shaped radius of a second protrusion 5211 (see fig. 14) on the bracket 50, the second protrusion 5211 on the bracket 50 may be movably disposed in the second limit groove 121 of the support 120, the second limiting groove 121 may also limit the moving range of the bracket 50.

Fig. 5 is a perspective view of a circuit board according to an embodiment of the present invention, and as shown in fig. 5, the circuit board 90 integrally includes a first circuit board 901 and a second circuit board 902 which are integrally formed, the first circuit board 901 and the second circuit board 902 respectively include a mounting portion 91, a via portion 92, and a patch 96, and the first circuit board 901 and the second circuit board 902 are connected in an L shape by the via portion 92. The first circuit board 901 and the second side board 902 are both rectangular boards, and a coil group 93 and a sensor 95 are respectively arranged on the inner surfaces of the first circuit board 901 and the second side board 902, the coil group 93 is annular and is installed in the middle of the circuit board 91, and the sensor 95 is arranged in the ring of the coil group 93. The middle portion of the mounting portion 91 of the first circuit board 901 further extends outward to form an L-shaped circuit board extension portion 95, the circuit board extension portion 95 includes a first extension portion 95A parallel to the mounting portion 91 and a second extension portion 95B perpendicular to the mounting portion 91, wherein the first extension portion 95A is mounted in the circuit board avoiding portion 135 of the housing 10.

The circuit board 90 is installed in the circuit board avoiding portion 130 of the housing 10, wherein the first circuit board 901 is installed in the circuit board avoiding portion 130 of the first side portion 13 of the housing 10, and the second circuit board 902 is installed in the circuit board avoiding portion 130 on the second side portion 14 of the housing 10; the mounting portions 91 of the first circuit board 901 and the second circuit board 902 are respectively embedded in the circuit board mounting portions 131 of the first side portion 13 and the second side portion 14 of the housing 10, the coil groups 93 and the sensors 94 of the first circuit board 901 and the second circuit board 902 are respectively mounted in the coil mounting portions 133 of the first side portion 13 and the second side portion 14, the communication portions 92 of the first circuit board 901 and the second circuit board 902 are respectively embedded in the communication mounting portions 132 of the first side portion 13 and the second side portion 14, the first extension portion 95A of the circuit board extension portion 95 of the first circuit board 901 is mounted in the circuit board avoiding portion 135, and the second extension portion 95B extends out of the housing 10 so as to be electrically communicated with the outside.

Fig. 6 is a perspective view of a bracket according to an embodiment of the present invention, as shown in fig. 6, the bracket 50 is a rectangular frame having a hollow structure 55, the hollow structure 55 is used for fixedly mounting the motor 30, four corners of the rectangular frame extend outward to form two first extending portions 51 and two second extending portions 52, the two first extending portions 51 are located on one diagonal line of the bracket 50, the two second extending portions 52 are located on the other diagonal line of the bracket 50, and the first extending portions 51 and the second extending portions 52 are integrally formed with the bracket 50. Wherein, the first extension part 51 is provided with a first upper ball groove 511 with a downward opening (facing the base), the second extension part 52 is provided with a second upper ball groove 521 with a downward opening, the first upper ball groove 511 and the second upper ball groove 521 are arc-shaped grooves, the radius of the arc-shaped grooves is slightly larger than that of the balls 60, and the depth of the arc-shaped grooves is smaller than that of the balls 60; the first upper ball groove 511 mates with the first lower ball groove 711 on the lower frame 70 to mount the first set of balls 61, and the second upper ball groove 521 mates with the second lower ball groove 1021 on the base 100 to mount the second set of balls 62.

The first extension part 51 is provided with an arc-shaped first protrusion 5111 (refer to fig. 12), the first protrusion 5111 is movably installed in the first limiting groove 21, and the reverse surface of the first protrusion 5111 is a first upper ball groove 511. The second extending portion 52 is provided with an arc-shaped second protrusion 5211 (refer to fig. 14), the shape and specification of the second protrusion 5211 are the same as those of the first protrusion 5111, the second protrusion 5211 is movably installed in the second limiting groove 121, and the reverse surface of the second protrusion 5211 is provided with a second upper ball groove 521.

The fixing frame 40 is provided with a hollow structure, the lower surface (i.e., the surface facing the base) of the fixing frame 40 is fixedly connected with the bracket 50, the bracket 50 achieves a better fixing effect with the motor 30 through the fixing frame 40, and the fixing frame 40 can be made of a metal material or a non-metal material, preferably a non-metal material for a better fixing effect, such as a rubber material.

Fig. 7 is a perspective view of the lower frame 70 according to an embodiment of the present invention, as shown in fig. 7, which is a rectangular frame provided with a hollow structure 77 and fitted with the upper frame 20 to mount the motor 30, and four sides of the rectangular frame are a first side 73, a second side 74, a third side 75, and a fourth side 76 in this order, and four corners of the rectangular frame include two first corners 71 on one diagonal line and two second corners 72 on the other diagonal line.

Upper end surfaces 78 of four side portions of the lower frame 70 are recessed downward by a certain depth (toward the housing direction) to form bracket mounting portions 79, the four side portions of the bracket mounting portions 79 are all formed into inclined surfaces from high to low along the first corner portions 71 to the second corner portions 72, the upper end surface 78 at the first corner portion 71 is slightly higher than the bracket mounting portions 79, the whole bracket mounting portions 79 are relatively high at the first corner portions 71, relatively low at the second corner portions 72, that is, the bracket mounting portion 79 forms a certain height difference between the first corner portion 71 and the second corner portion 72, the bracket 50 is mounted in the bracket mounting portion 79, the first upper ball groove 511 of the bracket 50 and the first lower ball groove 711 of the first corner portion 71 cooperate to mount the first set of balls 61, the second upper ball groove 521 of the bracket 50 is relatively rotatable within the bracket mounting portion 79 by a greater degree due to the difference in height of the bracket mounting portion 79 at the first and second corners 71 and 72.

In one embodiment, the bracket mounting portion 79 is a plane formed by recessing the upper end surface 78, and the two recessed planes of the first corner portions 71 are respectively provided with a boss, the height of the boss is slightly higher than that of the bracket mounting portion 79 and lower than that of the upper end surface 78, and the boss can also enable the bracket mounting portion 79 to form a certain height difference between the first corner portion 71 and the second corner portion 72.

The upper end faces 78 of the two first corner portions 71 are provided with first lower ball grooves 711 which are opened upward, and the first lower ball grooves 711 are matched with the first upper ball grooves 511 on the bracket 50 to mount the first group of balls 61.

The two second corners 72 are provided with an avoiding portion 721 for avoiding the second extending portion 52 of the bracket 50, the width of the avoiding portion 721 is slightly larger than the width of the second extending portion 52 of the bracket 50 so as to facilitate the second extending portion 52 to movably rotate, and after the bracket 50 is mounted on the bracket mounting portion 79, the second extending portion 52 extends out of the lower frame 70 through the avoiding portion 721 to match with the protruding portion 1020 on the base to mount the second group of balls 62.

Adjacent two side portions (the first side portion 73 and the second side portion 74) of the lower frame 70 are respectively recessed inward to form lower magnet grooves, wherein the first side portion 73 is recessed to form a first lower magnet groove 731, the second side portion 74 is recessed to form a second lower magnet groove 741, and the first and second

lower magnet grooves

731 and 741 are opened to the outside of the first and second side portions 73 and 74, respectively, the first and second

lower magnet grooves

731 and 741 have a width at the bracket mounting portion 79 greater than that of the external opening, that is, the magnet groove as a whole has a trapezoidal shape, the trapezoidal shape is matched with the shape of the magnet, the first restricting portion 732 extending from both ends of the outer opening of the first magnet groove 731 to the inside thereof, the second restricting portion 742 extending from both ends of the outer opening of the second magnet groove 741 to the inside thereof, and the first restricting portion 732 and the second restricting portion 742 restrict the movement of the magnet group 80 with respect to the lower frame 70.

First upper magnet grooves 22 and second upper magnet grooves 23 (see fig. 15 and 16) are also provided on adjacent both sides of the upper frame 20, the magnet groups 80 are rectangular magnet blocks, and both short sides thereof form a certain trapezoid to be fixedly mounted in magnet grooves formed by assembling the upper frame 20 and the lower frame 70, the magnet groups 80 include first and second groups of magnets 81 and 82 having the same specification, the first group of magnets 81 are fixedly mounted in groove bodies formed by assembling the first upper magnet grooves 22 of the upper frame 20 and the first lower magnet grooves 731 of the lower frame 70, the second group of magnets 82 are mounted in groove bodies formed by assembling the second upper magnet grooves 22 of the upper frame 20 and the second lower magnet grooves 741 of the lower frame 70, the first group of magnets 81 are engaged with the coil groups 93 on the first circuit board 901, and drive the upper frame 20 and the lower frame 70 to move around an axis (for example, the X-axis) when the coil groups 93 on the first circuit board 901 are energized, the second group of magnets 82 cooperates with the coil group 93 on the second circuit board 902, and drives the upper frame 20 and the lower frame 70 to move around another axis (for example, a Y axis) when the coil group 93 on the second circuit board 902 is energized, wherein the X axis and the Y axis are two coordinate axes perpendicular to each other in a rectangular coordinate system.

The balls 60 include four round balls of the same size, and for convenience of description, two balls mounted on one diagonal line of the bracket 50 are defined as a first group of balls 61, and the other two balls mounted on the other diagonal line of the bracket 50 are defined as a second group of balls 62, that is, the first group of balls 61 are mounted between the first upper ball groove 511 of the bracket 50 and the first lower ball groove 711 of the lower frame 70, and the second group of balls 62 are mounted between the second upper ball groove 521 and the second lower ball groove 1021 of the base 100.

Fig. 8 is a perspective view of a base according to an embodiment of the present invention, as shown in fig. 8, the base 100 includes a connecting wire fixing portion 101 and a base frame 102, the connecting wire fixing portion 101 is fixedly connected to one side of the frame 102; the flexible circuit board 103 is installed in the connecting wire fixing portion 101 and forms a protection space in cooperation with the cover body 11 on the housing 10 to reduce abrasion of the flexible connecting wire 103 caused by external movement, the connecting wire 103 is bent to be a Z-shaped stacked structure to reduce the occupied space of the flexible connecting wire 103, and the flexible connecting wire 103 is bent for multiple times to reduce the movement resistance caused by the anti-shake cradle head so as to improve the connection reliability, and reduce the influence on the rotation of the anti-shake cradle head 1, in other optional embodiments, the bending times can be flexibly set, and the method is not limited to the above-mentioned enumeration.

The frame 102 has a rectangular hollow 105, the frame 102 is matched with the housing 10 to accommodate the components of the upper frame 20, the motor 30, the lower frame 70, etc., two corners of the frame 102 on one diagonal are provided with a convex part 1020 protruding upwards (towards the bracket 50), the cross section of the convex part 1020 is triangular, the height of the convex part is substantially equal to the thickness of the lower frame 70, the upper surface of the convex part 1020 is provided with a second lower ball groove 1021 opening upwards, and the second lower ball groove 1021 is used for being matched with a second upper ball groove 521 of the bracket 50 to install the second group of balls 62.

Fig. 9 is a bottom view of the base and the lower frame assembled according to an embodiment of the present invention, fig. 10 is a bottom view of the base, the lower frame, the magnet assembly, the bracket, the fixing frame and the motor assembled according to an embodiment of the present invention, and as shown in fig. 9-10, when the base 100 and the lower frame 70 are assembled, inner surfaces of the protrusions 1020 of the base 100 are engaged with outer surfaces of the corners of the lower frame 70 where the escape portions 721 are provided, the first lower ball grooves 711 of the lower frame 70 and the second lower ball grooves 1021 of the base 100 are spaced at four corners and engaged with the first upper ball grooves 511 and the second upper ball grooves 521 of the bracket 50, respectively, to install the first set of balls 61 and the second set of balls 62, specifically, the first lower ball grooves 711 of the lower frame 70 and the first upper ball grooves 511 of the first extension portion 51 of the bracket 50 are engaged to install the first set of balls 61, and the second lower ball grooves 1021 of the base 100 and the second upper ball grooves 521 of the second extension portion 52 of the bracket 50 are engaged to install the second set of balls 62 Beads 62.

The first group of magnets 81 and the second group of magnets 82 are fixed in the first lower magnet groove 731 of the first side portion 73 and the second lower magnet groove 741 of the second side portion 74 of the lower frame 70, respectively, and are restricted by the first restricting portion 732 and the second restricting portion 742.

The first upper ball groove 511 and the second upper ball groove 521 on the bracket 50, the first lower ball groove 711 of the lower frame 70 and the second lower ball groove 1021 of the base 100 may be arc grooves of the same specification, the arc radius of the arc grooves is slightly larger than that of the balls so as to mount the balls 60, and the depth of the arc grooves is slightly smaller than that of the balls; after the first upper ball groove 511 of the bracket 50 is matched with the first lower ball groove 711 of the lower frame 70 to mount the first set of balls 61, a first spacing portion 53 is formed between the lower surface of the first extension 51 and the upper surface of the first corner portion 71 of the lower frame 70, and the first spacing portion 53 can provide the bracket 50 to rotate along one axis, for example, along the X axis, relative to the lower frame 70 through the first set of balls 61, and similarly, a second spacing portion 54 is formed between the second upper ball groove 521 and the second lower ball groove 1021 of the base 100 to realize the rotation along another axis, for example, along the Y axis, relative to the base 100 through the second set of balls 62, of the bracket 50, wherein the X axis and the Y axis are two mutually perpendicular axes in a rectangular coordinate system.

Fig. 11 is a sectional view taken along a first upper ball groove of a bracket after an anti-shake tripod head according to an embodiment of the present invention is assembled, fig. 12 is a partially enlarged view of a portion a of fig. 11, as shown in fig. 11-12, a fixed frame 40 is installed on an upper surface (i.e., a surface facing the upper frame) of the bracket 50, a motor 30 is fixedly installed in a hollow structure of the bracket 50 and the fixed frame 40 and closely attached to an inner surface of an upper frame 20, a first set of balls 61 is installed between the first upper ball groove 511 of the bracket 50 and a first lower ball groove 711 of a lower frame 70, a first limit groove 21 of the upper frame 20 is arc-shaped and fits an outer surface of the first upper ball groove 511, and a movable range of the first upper ball groove 511 and the first set of balls 61 of the bracket 50 is limited by the first limit groove 21 of the upper frame 20.

As shown in fig. 12, a first spacing portion 53 is formed between the first extension portion 51 of the bracket 50 and the first corner portion 71 of the lower frame 70, the bracket 50 and the lower frame 70 are relatively rotatably movable in the first spacing portion 53 by the first group of balls 61, and the movement range is limited by the first limit groove 21 of the upper frame 20 to prevent the first group of balls 61 from being separated from the groove body formed by the first upper ball groove 511 and the first lower ball groove 711 by an excessive tangential force.

Fig. 13 is a sectional view of the anti-shake tripod head according to an embodiment of the present invention taken along the second upper ball groove of the cradle after being assembled, fig. 14 is a partially enlarged view of a portion B of fig. 11, as shown in fig. 13 to 14, the second group of balls 62 are mounted between the second upper ball groove 521 on the cradle 50 and the second lower ball groove 1021 on the base 100, and the movable ranges of the second group of balls 62 and the second upper ball groove 521 are limited by the second limit groove 121 of the housing 10.

The second extending portion 52 of the bracket 50 and the protruding portion 1020 of the base 100 form a second spacing portion 54 therebetween, the bracket 50 and the base 100 can relatively rotate in the second spacing portion 54 by the second set of balls 62, and the movement range is limited by the second limiting groove 121 of the housing 10.

Fig. 15 is a transverse sectional view of the assembled housing, circuit board, upper frame, fixing frame, bracket, lower frame, magnet assembly, motor and base according to an embodiment of the present invention, fig. 16 is a vertical sectional view of the assembled housing, circuit board, upper frame, fixing frame, bracket, lower frame, magnet assembly, motor and base according to an embodiment of the present invention, as shown in fig. 15-16, the magnet assembly 80 is respectively installed in the first lower magnet slot 731 of the first side portion 73 and the second side portion 74 of the lower frame 70, the first circuit board 901 and the second circuit board 902 are respectively installed in the first side portion 13 and the second side portion 14 of the housing 10, and the coil assembly 93 and the sensor 94 of the circuit board 90 and the magnet assembly 80 on the lower frame 70 are correspondingly installed, after being powered, the sensor 94 can detect a position change of the motor 30 and send a signal, the coil assembly 93 cooperates with the corresponding magnet assembly 80 to drive the lower frame 70 and the base 100 to counteract the motor 30 through the rotational movement of the balls 60 when being powered on The resulting jitter.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. An anti-shake tripod head is characterized by comprising a shell, an upper frame, a lower frame, a bracket, balls, a magnet group, a circuit board and a base,

the magnet group is arranged on the side part of the upper frame and/or the lower frame;

the circuit board is arranged on the side part of the shell and is provided with a coil group to be matched with the magnet group;

the balls comprise a first group of balls and a second group of balls;

the bracket is installed between the upper frame and the lower frame and is provided with a first extension part and a second extension part which extend towards the corner of the lower frame, the first extension part is matched with the lower frame to install the first group of balls, and the second extension part is matched with the base to install the second group of balls; wherein

The lower frame includes first bight and the second bight that the interval set up and connects first bight with the lateral part of second bight, the lateral part is equipped with the support mounting portion, the support mounting portion is in first bight with form certain difference in height between the second bight, wherein, first bight with first extension cooperation is in order to install first group ball, the second bight sets up dodges the portion in order to right the second extension is dodged.

2. An anti-shake tripod head according to claim 1, further comprising a fixed frame fixedly mounted on the support to fix the motor.

3. The anti-shake tripod head according to claim 1, wherein the first extension of the bracket is provided with a first upper ball groove opening downwards and the second extension of the bracket is provided with a second upper ball groove opening downwards, the lower frame is provided with a first lower ball groove opening upwards, the base is provided with a second lower ball groove opening upwards, the first upper ball groove of the bracket and the first lower ball groove of the lower frame cooperate to mount the first set of balls, and the second upper ball groove of the bracket and the second lower ball groove of the base cooperate to mount the second set of balls.

4. The anti-shake tripod head according to claim 3, wherein the first upper ball groove, the second upper ball groove, the first lower ball groove and the second lower ball groove are arc-shaped grooves, the radius of the arc-shaped grooves is greater than that of the balls, and the depth of the arc-shaped grooves is smaller than that of the balls.

5. The anti-shake tripod head according to claim 1, wherein the upper end surfaces of the four side portions of the lower frame are recessed inward to form the bracket mounting portion, and the lower surface of the bracket mounting portion forms an inclined surface from high to low along the first corner portion to the second corner portion.

6. The anti-shake tripod head according to claim 4, wherein a pair of spaced diagonal corners of the base are provided with upwardly convex protrusions, and the second lower ball grooves are provided on the convex protrusions.

7. The anti-shake tripod head according to claim 4, wherein two adjacent side portions of the lower frame are each provided with a magnet mounting groove, the magnet assembly comprises two groups of magnets and is mounted in the magnet mounting grooves of the two adjacent side portions respectively,

two adjacent side parts of the shell are respectively provided with a circuit board avoiding part, the circuit board comprises a first circuit board and a second circuit board and is respectively arranged on the circuit board avoiding parts of the two adjacent side parts of the shell,

the first circuit board and the second circuit board are respectively provided with a coil group, the coil group of the first circuit board is matched with the first group of magnets, and the coil group of the second circuit board is matched with the second group of magnets.

8. The anti-shake tripod head according to claim 7, wherein sensors are further disposed in the coil sets of the first circuit board and the second circuit board, respectively.

9. The anti-shake tripod head according to claim 3, wherein the upper frame is provided with a first limiting groove, the first extending portion is provided with a first protruding portion, the first protruding portion is installed in the first limiting groove, and the reverse side of the first protruding portion is provided with the first upper ball groove.

10. The anti-shake tripod head according to claim 3, wherein the housing is provided with a second limiting groove, the second extending portion is provided with a second protruding portion, the second protruding portion is mounted in the second limiting groove, and the reverse side of the second protruding portion is provided with the second upper ball groove.