CN111665677B - Folding circuit board structure - Google Patents

Abstract

The invention relates to the field of anti-shake pan-tilt, in particular to a folding circuit board structure which is characterized by comprising a fixed carrier plate, at least one connecting component and a movable carrier plate which are sequentially connected; each connecting part and at least one connecting part adjacent to the connecting part are arranged on a reference plane along two directions which are obliquely arranged with each other, the reference plane is parallel to the fixed carrier plate, and a folding structure is arranged on part or all of the connecting parts; the folding structure comprises a plurality of end-to-end connection support plates, the two connection support plates are arranged in a non-coplanar manner and connected with each other through the bending support plate, so that the connection support plates and the bending support plates form an S shape, the folding structure can realize that the movable support plate relatively fixes the support plates and swings around multiple shafts, the folding structure of the folding circuit board structure can ensure that the elastic coefficients of the multiple shafts are basically the same, the phenomenon that the anti-shaking power consumption of the tripod head on multiple motion shafts is inconsistent is avoided, and the overall power consumption of the anti-shaking tripod head is reduced.

Description

Folded circuit board structure

technical field

The invention relates to the field of anti-shake gimbal, in particular to a folded circuit board structure.

Background technique

In recent years, small mobile devices with shooting functions have become very popular, and their applications have been expanding, including aerial photography, action cameras, and driving recorders. The device includes at least one compact camera module. Therefore, the market for such modules is huge and the growth is steadily rising.

When taking photos and videos, the photos and videos taken by the device are likely to be blurred or shaken by external vibrations, which affects the quality of photos and videos. This problem is exacerbated when vibrations are high, or in low light situations.

In order to solve the above problems, many small anti-shake technologies have appeared on the market. Among them, the effect of improving image quality is the best by compensating for image blur and shaking caused by vibration through mechanical methods. The mechanical method may be to translate a group of lenses (refer to patent documents: CN104204934A, US20140333784A1) through an anti-shake actuator, or rotate a group of lenses and image sensors (refer to patent documents: CN102934021B, US9229244B2) to achieve anti-shake effect. The anti-shake effect of the second rotary mechanical method is generally better than that of the first translational mechanical method, so the design of the small circuit board in the present invention is also mainly aimed at the rotary method.

Since the rotary anti-shake actuator needs to move the image sensor during the anti-shake process, the circuit board connected to the image sensor needs to be connected to other stationary structures through a conductive elastic structure, so that other external components (for example: on the main board of a small mobile device) The single-chip microcomputer and power supply components) can connect and communicate with the image sensor on the circuit, capture images and provide power.

The elastic structures are usually composed of flexible printed circuit boards, and have good multi-axis elasticity and drop resistance, can withstand the impact and acceleration force when falling, and do not affect the anti-shake process. Multi-axis motion of movable structures in actuators.

For rotary anti-shake actuators, existing circuit board designs can be divided into two categories. The first type (reference patent documents: CN107315302A, CN208399865U) does not need to be folded. The elastic deformation part of the circuit board connecting the movable and immovable parts is on a plane, and multi-axis rotation is achieved through a special circuit board design. degrees of freedom. The advantages of this technology are that the required space is small, the production process is simple, and the cost is low.

The second type (refer to patent documents: CN106338873B, CN109752863A) is to achieve multi-axis degrees of freedom by crimping at most three times. The advantage of this design is that it provides up to three rotational degrees of freedom.

In the first type of prior art (refer to patent documents: CN107315302A, CN208399865U), although multi-axis rotational degrees of freedom can be provided, the spring coefficient along the rotational direction of the optical axis (rolling) is usually much larger than that of the other two axes (yaw). and pitch), resulting in excessive power consumption in the rolling direction, making it difficult to achieve roll stabilization, or reducing battery life.

In the second type of prior art (refer to patent documents: CN106338873B, CN109752863A), in order to have good multi-axial elasticity and drop resistance of the elastic structure, the flexible circuit boards forming the elastic structure often need to be curled, or need a longer shape . Such a design needs to occupy more space for the anti-shake actuator, which hinders the miniaturization of the anti-shake actuator. In addition, the multi-axis rotation spring coefficients of this type of design are usually high, so the average anti-shake power consumption will be higher; and it is difficult to make the spring coefficients of each axis very close, resulting in a relatively large difference in power consumption in different directions. large, and the power consumption in some directions will be higher than in other directions.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide a solution to solve the problem that the elastic circuit board of the existing anti-shake gimbal is difficult to achieve multi-axis anti-shake and the power consumption of anti-shake in multiple directions is large.

Based on this, the present invention provides a folded circuit board structure, comprising a fixed carrier board, at least one connecting component and a movable carrier board connected in sequence;

Each of the connecting parts and at least one connecting part adjacent to it are arranged in two directions inclined to each other on a reference plane, and the reference plane is parallel to the fixed carrier plate, and some or all of the connecting parts are arranged on a reference plane. Has a folded structure;

The folded structure includes a plurality of end-to-end connection carriers, and two adjacent connection carriers are arranged non-coplanarly and are connected by bending the carrier, so that the plurality of connection carriers and the bending carrier are connected. The carrier plate forms an S shape.

Preferably, two adjacent connection carriers are arranged obliquely, and the included angle between the two is 0-45°.

Preferably, the included angle between two adjacent connection carriers is 3°.

Preferably, the width of the connection carrier in the extension direction is at least twice as large as the thickness of the connection carrier in the extension direction.

Preferably, the included angle between each of the connecting parts and the adjacent connecting parts on the reference plane is 45° to 135°.

Preferably, the included angle between each of the connecting parts and the adjacent connecting parts on the reference plane is 90°.

Preferably, the number of the connecting parts is two, which are respectively denoted as the first connecting part and the second connecting part, and the fixed carrier plate, the first connecting part, the second connecting part and the movable carrier plate are connected in sequence. connect;

The first connecting part and the second connecting part are arranged in two directions inclined to each other on a reference plane, the reference plane being parallel to the fixing carrier, the first connecting part and/or the second connecting part The connecting part is provided with a folding structure.

Preferably, the number of the first connection part and the second connection part is two, and the first connection part and the second connection part are provided on both sides of the movable carrier plate.

Preferably, the folded structure of each of the connecting parts has at least three of the bent carrier plates.

Preferably, the image sensor of the camera module is arranged on the movable carrier board.

The folded circuit board structure of the present invention is characterized in that it comprises a fixed carrier board, at least one connecting part and a movable carrier board which are connected in sequence; each connecting part and at least one connecting part adjacent to it are mutually inclined along the reference plane. The two directions of the arrangement are arranged, the reference plane is parallel to the fixed carrier plate, and some or all of the connecting parts are provided with a folding structure; and the two are connected by bending the carrier board, so that the plurality of connecting carrier boards and the bending carrier board form an S shape. The folding structure can ensure that the elastic coefficients on multiple axes are basically the same, avoid the phenomenon of inconsistent anti-shake power consumption on multiple motion axes of the gimbal, and reduce the overall power consumption of the anti-shake gimbal.

Description of drawings

FIG. 1 is one of the structural schematic diagrams of the folded circuit board structure according to the embodiment of the present invention;

FIG. 2 is one of the top schematic views of the folded circuit board structure according to the embodiment of the present invention;

3 is one of the schematic diagrams of the folding structure of the folding circuit board structure according to the embodiment of the present invention;

FIG. 4 is the second structural schematic diagram of the folded circuit board structure according to the embodiment of the present invention;

5 is the second schematic top view of the folded circuit board structure according to the embodiment of the present invention;

6 is a schematic structural diagram of mutually inclined connection carriers of the folded circuit board structure according to an embodiment of the present invention;

FIG. 7 is a third structural schematic diagram of a folded circuit board structure according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of the connection carrier boards parallel to each other of the folded circuit board structure according to the embodiment of the present invention;

9 is a schematic structural diagram of a connecting sub-board of a folded circuit board structure according to an embodiment of the present invention.

Among them, 1. fixed carrier board; 2. first connecting part; 3. second connecting part; 4. movable carrier board; 5. foldable structure; 51, connecting carrier board; 511, connecting daughter board; board; 6. Image sensor.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

1 to 9, the folded circuit board structure of the present invention is schematically shown, including a fixed carrier board 1, at least one connecting part and a movable carrier board 4 connected in sequence, wherein the number of the connecting parts can be One or more, as shown in FIG. 1 , there is only one connecting member, and the connecting member is referred to as the first connecting member 2 here.

The folded circuit board structure is mainly used for the miniature anti-shake gimbal. The micro anti-shake gimbal has a stationary structure and a movable structure. The camera module is installed on the movable structure. The movable structure moves relative to the stationary structure to offset the external influence. The movement of the immobile structure realizes the anti-shake function. Specifically, the fixed carrier plate 1 is installed on the immobile structure of the pan-tilt head, the movable carrier board 4 is mounted on the movable structure of the pan-tilt head, the image sensor 6 is arranged on the movable carrier board 4, the fixed carrier board 1, the connecting parts and The movable carrier board 4 is provided with conductors, and the image sensor 6 is electrically connected to the circuit elements (such as the main control board) outside the miniature anti-shake gimbal through the conductors.

In some optional embodiments, as shown in FIG. 4 , the number of connecting parts is set to two, which are respectively denoted as the first connecting part 2 and the second connecting part 3 , the fixing carrier 1 , the first connecting part 2 , the The second connecting member 3 and the movable carrier plate 4 are connected in sequence, and the first connecting member 2 and the second connecting member 3 are arranged in two directions inclined to each other on a reference plane, and the reference plane is parallel to the fixed carrier plate 1, wherein, The first connecting part 2 and the second connecting part 3 are preferably arranged perpendicular to each other, and a folding structure 5 is provided on the first connecting part 2 and/or the second connecting part 3 .

The folded structure 5 includes a plurality of connection carriers 51 connected end to end, and two adjacent connection carriers 51 are arranged non-coplanarly and are connected by a bending carrier 52, so that the plurality of connection carriers 51 and the bending carrier are connected. The plate 52 forms an S shape, that is, two adjacent connection carriers 51 may be parallel to each other (as shown in FIG. 8 ), or may be arranged obliquely to each other (as shown in FIG. 6 ). The included angle between them is 0 to 45°. With reference to FIG. 3 , the number of connection carriers 51 in the folding structure 5 may be four. Correspondingly, since two adjacent connection carriers 51 are connected by a bent carrier 52 , the bent carrier The number of 52 is three. Optionally, the included angle between two adjacent connecting carriers 51 is 3°. The folding structure 5 of this type of structure can realize that the movable carrier 4 can be wound around the fixed carrier 1 . Multi-axis swing, and the folding structure 5 of the folded circuit board structure can ensure that the elastic coefficients on the multi-axis are basically the same, avoid the phenomenon of inconsistent anti-shake power consumption on multiple motion axes of the gimbal, and reduce the overall anti-shake gimbal. power consumption.

Preferably, the width of the connection carrier 51 in the extension direction is at least twice as large as the thickness of the connection carrier 51 in the extension direction.

A position sensor may be provided on the fixed carrier board 1, the first connecting part 2, the second connecting part 3 and/or the movable carrier board 4, and the position sensor is used to detect the displacement or rotation of the movable carrier board 4 (movable structure of the pan/tilt head). Amplitude to achieve anti-shake control.

4 and 7, the number of the first connecting member 2 and the second connecting member 3 are both provided with two, and both sides of the movable carrier plate 4 are provided with the above-mentioned first connecting member 2 and second connecting member 3, The included angle between the first connecting part 2 and the second connecting part 3 on the reference plane is 45° to 135°, and may be 90° in some optional embodiments. The two second connecting parts 3 are both connected to one side of the movable carrier plate 4 , and the first connecting part 2 and the second connecting part 3 are connected by a flat plate-shaped intermediate connecting part.

Since the extending directions of the first connecting member 2 and the second connecting member 3 are different, that is, the extending directions of the folding structures 5 provided by the two are different, the plurality of folding structures 5 can share the displacement of the movable structure of the head in different directions. desired deformation. For example, when the movable carrier 4 moves relative to the fixed carrier 1 in the X-axis direction, the folded structure 5 on the first connecting member 2 is deformed to provide the required degree of freedom of the movable carrier 4 in the X-axis direction; When moving relative to the fixed carrier plate 1 in the Y-axis direction, the folded structure 5 on the second connecting member 3 is deformed to provide the required degree of freedom of the movable carrier plate 4 in the Y-axis direction. When the movable carrier 4 swings around the X-axis, Y-axis or Z-axis, the folding structures 5 on the first connecting part 2 and the second connecting part 3 can be deformed to provide the required degree of freedom for the movable carrier 4 . Wherein, the X-axis, the Y-axis and the Z-axis are vertically arranged in two phases. The connecting carrier 51 and the bending carrier 52 in the folded circuit board structure of the present invention are both plate-like structures with low elastic coefficient, which is beneficial to improve the anti-shake performance of the gimbal and reduce the power consumption of the gimbal.

When the two adjacent connection carriers 51 in the folded structure 5 are parallel to each other, the extension length of the folded structure 5 can be smaller, so as to save the space occupied by the folded circuit board structure of the present invention, which is beneficial to reduce the miniature anti-shake cloud volume of the table.

During the production process, the existing cold pressing or hot pressing process can be used to make the bent carrier plate 52 have a certain curvature.

As shown in FIG. 9 , the connection carrier 51 includes at least two connection sub-boards 511 arranged in parallel with each other, and a gap is left between the two adjacent connection sub-boards 511 , and the bending carrier 52 does not use the above-mentioned connection carrier 51's layered design. The layered design of the connection carrier plate 51 is beneficial to reduce its elastic coefficient.

The above-mentioned folded structure 5 can resist the violent impact that may occur in a general falling process, and the folded structure 5 will not be permanently deformed, which effectively improves the reliability of the folded circuit board structure.

In some optional embodiments, the folded structure 5 of the first connection part 2 has five bent carrier plates 52 , and the folded structure 5 of the second connection part 3 has seven bent carrier plates 52 . Of course, adding rounded or chamfered design to the above-mentioned fixed carrier plate 1 , first connecting member 2 , second connecting member 3 or movable carrier plate 4 is within the protection scope of the present invention.

The beneficial effects of the present invention include:

1. Improve the existing circuit board design, provide multi-axis degrees of freedom and reduce the multi-axis elastic coefficient, especially in the rolling direction;

2. Reduce the power consumption and volume of the miniature pan-tilt anti-shake camera module;

3. The anti-shake camera module with circuit board design can support multi-axis anti-shake, and can have more advantages in size, reliability and cost.

To sum up, the folded circuit board structure of the present invention is characterized in that it includes a fixed carrier board 1, at least one connecting part and a movable carrier board 4 connected in sequence; each connecting part and at least one connecting part adjacent to it. Arranged in two directions inclined to each other on the reference plane, the reference plane is parallel to the fixed carrier plate 1, and some or all of the connecting parts are provided with a folding structure 5; The two adjacent connection carriers 51 are not coplanar and are connected by bending the carrier 52 , so that the plurality of connection carriers 51 and the bent carrier 52 form an S shape, and the folded structure 5 can realize the movable carrier 4 Relatively fixed carrier board 1 swings around multiple axes, and the folding structure 5 of the folded circuit board structure can ensure that the elastic coefficients on multiple axes are basically the same, avoid the phenomenon of inconsistent anti-shake power consumption on multiple motion axes of the gimbal, reduce The overall power consumption of the anti-shake gimbal.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made. These improvements and substitutions It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A folding circuit board structure is characterized by comprising a fixed carrier plate, at least two connecting parts and a movable carrier plate which are sequentially connected;

each connecting part and at least one connecting part adjacent to the connecting part are arranged on a reference plane along two directions which are obliquely arranged with each other, the reference plane is parallel to the fixed carrier plate, and all the connecting parts are provided with folding structures;

the folding structure comprises a plurality of connecting carrier plates which are connected end to end, two adjacent connecting carrier plates are arranged in a non-coplanar manner and are connected through a bent carrier plate, so that the connecting carrier plates and the bent carrier plates form an S shape, and the extending direction of the connecting carrier plates towards the bent carrier plates is intersected with the reference plane;

the connecting carrier plate comprises at least two connecting sub-plates which are arranged in parallel, and a gap is reserved between every two adjacent connecting sub-plates.

2. The structure of the foldable circuit board of claim 1, wherein two adjacent connection carrier boards are disposed obliquely and have an included angle of 0-45 °.

3. The folded circuit board structure of claim 2, wherein an included angle between two adjacent connection carrier boards is 3 °.

4. The folded circuit board structure of claim 1, wherein the width of the connection carrier board in the extending direction thereof is at least one time greater than the thickness of the connection carrier board in the extending direction thereof.

5. The folded circuit board structure of claim 1, wherein each of the connecting members and the connecting member adjacent thereto form an angle of 45-135 ° with respect to a reference plane.

6. The folded circuit board structure of claim 5, wherein each of the connection members is angled 90 ° from its adjacent connection member in a reference plane.

7. The structure of a foldable circuit board according to claim 1, wherein there are two of the connecting members, which are respectively denoted as a first connecting member and a second connecting member, and the fixed carrier plate, the first connecting member, the second connecting member and the movable carrier plate are connected in sequence;

the first connecting part and the second connecting part are arranged on a reference plane along two directions which are obliquely arranged with each other, and a folding structure is arranged on the first connecting part and/or the second connecting part.

8. The folded circuit board structure of claim 7, wherein the number of the first connecting component and the second connecting component is two, and the first connecting component and the second connecting component are disposed on two sides of the movable carrier.

9. The folded circuit board structure of claim 1, wherein the folded structure of each connection member has at least three of the bent carrier plates.

10. The foldable circuit board structure of claim 1, wherein the image sensor of the camera module is disposed on the movable carrier.

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