A photosensitive chip anti-shake and focusing driving device

Abstract

The present invention provides a driving device for photosensitive chip anti-shake and focusing, including a driving device body and a flexible circuit board, wherein the driving device body is provided with a magnet, an anti-shake coil and a focusing coil; a photosensitive chip is provided on the flexible circuit board, and opposite ends of the flexible circuit board extend symmetrically to form a focusing elastic part for focusing, and a plurality of anti-shake elastic parts are formed on the peripheral side of the flexible circuit board along the focusing elastic part. A flexible circuit board is used in the driving device body, and the input of module signals, focusing current and anti-shake current is realized through the flexible circuit board; at the same time, the flexible circuit board forms a focusing elastic part in a direction perpendicular to the photosensitive chip, and when subjected to a driving force, deformation and movement are generated to focus, and the anti-shake elastic part provides elastic deformation to the flexible circuit board when the side moves, so as to achieve the purpose of precise focusing and anti-shake, and realize the anti-shake of the photosensitive chip to eliminate the image and video shaking caused by hand shaking during shooting.

Description

Technical Field

[0001] The present invention relates to the field of cameras, and in particular to a photosensitive chip anti-shake and focus driving device. Background Art

[0002] Existing autofocus cameras all achieve the purpose of anti-shake and focusing by driving the movement of the lens. However, the technology of lens anti-shake has a bottleneck that as the weight of the lens increases, the driving force cannot drive the heavy lens for anti-shake, which makes the development of driven lens anti-shake prone to bottlenecks and cannot be compatible with small size and anti-shake effects. In addition, the lens anti-shake technology has a defect that it cannot achieve the effect of rotational anti-shake. Because the lens has a circular structure, the purpose of rotational anti-shake cannot be achieved after the lens is rotated. In summary, driving the lens for anti-shake is a mature technology, so it is difficult to obtain results if research and development continues on this basis, resulting in high research and development costs and labor costs. Summary of the invention

[0003] The present invention provides a photosensitive chip anti-shake and focus driving device, aiming to provide a photosensitive chip anti-shake and focus driving device which can realize the focus and anti-shake of a camera by moving a photosensitive chip, so as to solve the problem that the existing anti-shake motor and focus motor have similar structures or single methods.

[0004] The present invention is implemented as follows: a photosensitive chip anti-shake and focus driving device, comprising: a driving device body, in which a magnet, an anti-shake coil located in the vertical direction of the magnet, and a magnet bracket accommodating a plurality of the magnets are arranged; and

[0005] A flexible circuit board is provided with a photosensitive chip, and focus elastic parts are symmetrically extended at two opposite ends thereof. The elastic deformation generated by the focus elastic part is perpendicular to the direction of the photosensitive chip. A plurality of anti-shake elastic parts are formed on the peripheral side of the flexible circuit board and extend along the focus elastic part. An annular focus coil is provided between the magnet and the flexible circuit board. The end of the anti-shake focus part is provided on the driving device body, the magnet is provided between the anti-shake elastic part and the focus elastic part, and the connection part between the focus elastic part and the anti-shake elastic part is provided on the magnet bracket.

[0006] Preferably, the focusing elastic part is arranged as two symmetrical S-shaped structures.

[0007] Preferably, a first shaping block is provided at the bending portion of the focusing elastic portion.

[0008] Preferably, the focusing elastic part of the S-shaped structure is projected into a U-shape in a direction perpendicular to the photosensitive chip, and the opening of the U-shape faces the other focusing elastic part of the S-shaped structure.

[0009] Preferably, a plurality of connection protrusions are arranged in an array on the circumference of the circumference of the flexible circuit board, and the connection protrusions are fixedly arranged on the annular focusing coil and are electrically connected to the annular focusing coil.

[0010] Preferably, when the flexible circuit board is rectangular or square, the anti-shake elastic portion is an L-shaped structure arranged in two or more circular arrays.

[0011] Preferably, a second shaping block is provided at the bending portion of the anti-shake elastic portion.

[0012] Preferably, the lens of the driving device body is fixedly disposed directly above the flexible circuit board.

[0013] The beneficial effects of the present invention are:

[0014] 1. A flexible circuit board is used in the driving device body, and the module signal, focus current and anti-shake current are input through the flexible circuit board; at the same time, the flexible circuit board provides elastic deformation in a direction perpendicular to the photosensitive chip by forming a focus elastic part. When the photosensitive chip is subjected to a driving force generated by the annular focus coil after being energized, elastic deformation will be generated for focusing. When the anti-shake elastic part is subjected to a lateral driving force generated by the anti-shake coil and the magnet, elastic deformation will occur, thereby achieving the purpose of precise focus and anti-shake, and achieving the effect of eliminating image and video jitter caused by hand shake during shooting through the anti-shake of the photosensitive chip.

[0015] 2. The focus elastic part adopts two symmetrical S-shaped structures. The symmetrical structural design can balance the internal force generated by the photosensitive chip. Therefore, the two S-shaped structures can move smoothly when focusing to achieve the effect of precise focus adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 1 is a schematic diagram of the structure of the driving device for anti-shake and focusing of the photosensitive chip according to an embodiment of the present invention;

[0018] Figure 2 It is a partial diagram of the driving device for anti-shake and focusing of the photosensitive chip according to an embodiment of the present invention;

[0019] Figure 3It is a partial schematic diagram of the driving device for anti-shake and focusing of the photosensitive chip according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of a flexible circuit board of a photosensitive chip anti-shake and focus driving device according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 10. driving device body; 101. magnet; 102. anti-shake coil; 103. magnet bracket;

[0023] 104, lens; 105, base; 106, annular focusing coil;

[0024] 20. flexible circuit board; 201. focusing elastic part; 202. anti-shake elastic part;

[0025] 203, first shaping block; 204, U-shape; 206, second shaping block;

[0026] 207, connecting protrusion;

[0027] 30. Photosensitive chip. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] Example

[0032] Please refer to Figures 1 to 4 As shown, this embodiment provides a driving device for anti-shake and focusing of a photosensitive chip, including a driving device body 10 and a flexible circuit board 20. The driving device body 10 is provided with a magnet 101, an anti-shake coil 102 located in the vertical direction of the magnet 101, and a magnet bracket 103 accommodating multiple magnets 101; a photosensitive chip 30 is arranged on the flexible circuit board 20, and a focus elastic part 201 is symmetrically extended at two opposite ends of the flexible circuit board 20 to form a focus elastic part 201, and the elastic deformation generated by the focus elastic part 201 (the elastic deformation is caused by the driving force of the coil and the magnet) is perpendicular to the direction of the photosensitive chip 30, and a plurality of anti-shake elastic parts 202 are formed on the peripheral side of the flexible circuit board 20 along the focus elastic part 201, and a ring-shaped focus coil 106 is arranged between the magnet 101 and the flexible circuit board 20. The end of the anti-shake elastic part 202 is arranged on the driving device body 10 , the magnet 101 is arranged between the anti-shake elastic part 202 and the flexible circuit board 20 , and the connection part between the focus elastic part 201 and the anti-shake elastic part 202 is fixedly arranged on the magnet bracket 103 .

[0033] The description is given assuming that the direction perpendicular to the photosensitive chip 30 is the vertical direction or the Z-axis direction, and the plane of the flexible circuit board 20 on which the photosensitive chip 30 is mounted is the horizontal plane or the XY-axis plane.

[0034] The flexible circuit board 20 can be divided into three parts. The main body part is a plate-shaped structure for carrying and installing the photosensitive chip 30, providing a focus elastic part 201 with elastic deformation in the vertical direction, and an anti-shake elastic part 202 for realizing anti-shake movement. The three parts are connected to each other as an integrated structure. The two ends of the focus elastic part 201 and the anti-shake elastic part 202 are fixedly arranged. The focus elastic part 201 extends from the main body part and is fixed on the magnet bracket 103 (described in detail below) at the connection with the anti-shake elastic part 202. The anti-shake elastic part 202 is fixedly installed between the magnet bracket 103 and the base 105 of the driving device body 10, so that the focus elastic part 201 can provide elastic deformation for focusing when moving in the vertical direction (elastic deformation occurs by using the driving force generated by the magnet and the annular focus coil); and the elastic deformation of the anti-shake elastic part 202 realizes the movement of the main body part on the horizontal plane (elastic deformation occurs by using the driving force generated by the magnet and the anti-shake coil), offsetting the shake generated by the photosensitive chip 30.

[0035] The flexible circuit board 20 is installed in the driving device body 10, and the focus elastic part 201 and the anti-shake elastic part 202 are formed by bending and extending the flexible circuit board 20. The focus elastic part 201 perpendicular to the direction of the photosensitive chip 30 can realize the focus movement of the photosensitive chip 30 in the vertical direction. And through two symmetrically arranged anti-shake elastic parts 202, which are arranged around the peripheral position of the driving device body 10, the electromagnetic force is used to drive the flexible circuit board 20 and the photosensitive chip 30 to move on the horizontal plane to achieve anti-shake. The purpose of anti-shake and focusing is achieved by driving the movement of the photosensitive chip 30.

[0036] Specifically, Figure 2 and Figure 3 As shown, in this embodiment, the driving device body 10 is provided with a magnet bracket 103 that accommodates a plurality of magnets 101. The bending portion between the anti-shake elastic portion 202 and the focus elastic portion 201 is positioned and fixed on the magnet bracket 103, and the extended end of the anti-shake elastic portion 202 is provided on the base 105 of the driving device body 10. The magnets 101 are positioned and fixedly installed by the magnet bracket 103, and the connection between the focus elastic portion 201 and the anti-shake elastic portion 202 is fixed on the magnet bracket 103, while the anti-shake elastic portion 202 is fixed between the magnet bracket 103 and the base 105, so that when the magnet bracket 103 moves, the flexible circuit board 20 is driven to move through the elasticity of the focus elastic portion 201 and the anti-shake elastic portion 202, so as to achieve the purpose of being driven by the electromagnetic force and the magnet 101, and achieve the effect of focusing and anti-shake through the elastic deformation of the flexible circuit board 20. Figure 3 and Figure 4As shown, in this embodiment, a plurality of connecting protrusions 207 are arranged in a row on the circumference of the flexible circuit board 20, and the connecting protrusions 207 are fixedly arranged on the annular focusing coil 106. The number of connecting protrusions 207 can be designed according to different ways of controlling the driving device of the photosensitive chip anti-shake and focusing. If open-loop control is adopted, two connecting protrusions 207 are arranged; and if closed-loop control is adopted, four connecting protrusions 207 are arranged.

[0037] Specifically, by energizing the magnet and the anti-shake coil 102 to generate a rotating magnetic field force (the main reason for generating the rotating force is that the two anti-shake coils in the same direction are not symmetrically designed but are staggered along the center), the flexible circuit board can be rotated at a certain angle on the horizontal plane, thereby achieving an anti-shake effect in the rotation direction. Specifically, when rotational shaking occurs, the anti-shake coil 102 cuts the magnetic field line to generate a force in the corresponding direction, thereby driving the flexible circuit board to rotate within a certain angle, achieving image and video shaking caused by hand shaking during shooting through photosensitive chip anti-shake, and improving the shooting effect of the photosensitive chip anti-shake and focus driving device.

[0038] Furthermore, when the photosensitive chip 30 is used for anti-shake, when adapting to different types of lenses, the improvement of the driving device structure will not be affected by the size or weight of the lens, but only the type of the photosensitive chip will be changed (the size of the photosensitive chip is different in physical structure), so it will not have a significant impact on the structural design of the photosensitive chip anti-shake. In addition, the photosensitive chip 30 can be a photosensitive chip, and the size and weight of the photosensitive chip will basically not increase with the increase of pixels (the increase in weight is small, so the weight impact on the photosensitive chip anti-shake and focusing driving device can be ignored), and the photosensitive chip is square, so when the photosensitive chip rotates and moves, it can achieve the effect of rotational anti-shake.

[0039] like Figure 2 and Figure 3 As shown, in this embodiment, the magnet 101 of the driving device body 10 is arranged between the anti-shake elastic part 202 and the flexible circuit board 20. The magnet 101 is a permanent magnet 101, and the anti-shake coil 102 on the driving device body 10 is located directly above the magnet 101 in the Z-axis direction. When the anti-shake coil 102 is energized, a corresponding electromagnetic force is generated and a thrust is generated between the magnet 101, thereby driving the flexible circuit board 20 to move. The flexible circuit board 20 can generate corresponding elastic deformation through the S-shaped structure, and achieve the effect of resetting after the movement ends, so as to achieve the purpose of realizing the anti-shake of the photosensitive chip and the focusing of the driving device for focusing.

[0040] Furthermore, if Figure 4As shown, in this embodiment, the focus elastic part 201 is arranged as two symmetrical S-shaped structures, and the focus elastic part 201 is located directly above the photosensitive chip or directly below the photosensitive chip. It can be understood that the S-shaped structure is formed by multiple layers of bending, and the symmetrical structural design can balance the internal force generated by the photosensitive chip 30, so that the two S-shaped structures can move smoothly during focusing to achieve the effect of accurate focus adjustment.

[0041] Furthermore, in this embodiment, a first shaping block 203 is provided at the bending part of the focus elastic part 201, and the first shaping block 203 can be a plastic block or a foam block. One first shaping block 203 is installed at each bending part, and the first shaping block 203 is fixedly installed on the focus elastic part 201 by bonding. The installation of the first shaping block 203 can shape the bent S-shaped structure, avoid the problem of bending and rebound of the extended flexible circuit board 20, and improve the stability of product performance.

[0042] like Figure 4 As shown, in this embodiment, the S-shaped focus elastic part 201 is projected into a U-shape 204 perpendicular to the direction of the photosensitive chip 30, and the opening of the U-shape 204 faces the focus elastic part 201 of another S-shaped structure. The U-shape 204 structure of the focus elastic part 201 can adjust the elastic deformation of the S-shaped structure, for example, the width of the two sides of the U-shape 204 structure. Different widths can change the elastic deformation of the focus elastic part 201, while ensuring that the focus elastic part 201 is an S-shaped structure, so as to achieve the use of the anti-shake and focus driving device matching photosensitive chips of different sizes, thereby improving practicality.

[0043] like Figure 4 As shown, in this embodiment, when the flexible circuit board 20 is rectangular, the anti-shake elastic part 202 is two symmetrically arranged L-shaped structures. Through the two L-shaped anti-shake elastic parts 202, an intermittent surround can be formed on the side of the flexible circuit board 20. When moving, the L-shaped anti-shake elastic part 202 is bent and deformed, so that the photosensitive chip 30 on the flexible circuit board 20 can move on the X-axis or Y-axis, eliminating the image and video jitter caused by hand shaking during shooting, and achieving the purpose of anti-shake.

[0044] like Figure 2 and Figure 3 As shown, in this embodiment, a second shaping block 206 is provided at the bending portion of the anti-shake elastic portion 202. The second shaping block 206 may also be a plastic part, and the second shaping block 206 is fixedly installed by gluing. The second shaping block 206 may be used to shape the bending portion of the flexible circuit board 20, thereby achieving shaping of the flexible circuit board 20 and improving the stability of the structure.

[0045] like Figure 1 As shown, in this embodiment, the lens 104 of the driving device body 10 is fixedly arranged just above the flexible circuit board 20. The fixed installation of the lens 104 can realize the positioning installation of the photosensitive chip anti-shake and focus driving device, so there is no need to perform focus movement through the lens 104, and the flexible circuit board 20 and the photosensitive chip 30 are used to perform focus movement, so that the entire photosensitive chip anti-shake and focus driving device has an integral structure outside, thereby improving the structural stability.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photosensitive chip anti-shake and focus driving device, characterized in that: include: A driving device body, in which a magnet, an anti-shake coil located in the vertical direction of the magnet, and a magnet bracket accommodating a plurality of the magnets are arranged; and A flexible circuit board is provided with a photosensitive chip, and a focus elastic part is symmetrically extended at two opposite ends thereof, and the elastic deformation generated by the focus elastic part is perpendicular to the direction of the photosensitive chip, and a plurality of anti-shake elastic parts are formed along the focus elastic part and around the peripheral side of the flexible circuit board, and an annular focus coil is provided between the magnet and the flexible circuit board; The end of the anti-shake elastic part is arranged on the driving device body, the magnet is arranged between the anti-shake elastic part and the focus elastic part, and the connection part between the focus elastic part and the anti-shake elastic part is fixedly arranged on the magnet bracket; The flexible circuit board can be divided into three parts. The main body is a plate-shaped structure for carrying and installing a photosensitive chip, a focus elastic part that provides elastic deformation in the vertical direction, and an anti-shake elastic part that realizes anti-shake movement. The three parts are interconnected into an integrated structure. The focus elastic part and the anti-shake elastic part are fixedly arranged at both ends. The focus elastic part extends from the main body and is fixed on the magnet bracket at the connection with the anti-shake elastic part. The anti-shake elastic part is fixedly installed between the magnet bracket and the base of the driving device body, so that the focus elastic part can provide elastic deformation for focusing when moving in the vertical direction; and the elastic deformation of the anti-shake elastic part enables the main body to move on the horizontal plane, thereby offsetting the shake generated by the photosensitive chip. Wherein, the focus elastic part is arranged in two symmetrical S-shaped structures, and the focus elastic part is located directly above the photosensitive chip or the focus elastic part is located directly below the photosensitive chip; Wherein, a first shaping block is provided at the bending portion of the focusing elastic portion; The focus elastic part of the S-shaped structure is projected into a U-shape perpendicular to the direction of the photosensitive chip, and the opening of the U-shape faces the focus elastic part of the other S-shaped structure; Wherein, a plurality of connection protrusions are arranged in a row on the circumference of the circumference of the flexible circuit board, and the connection protrusions are fixedly arranged on the annular focusing coil and are electrically connected to the annular focusing coil; Wherein, when the flexible circuit board is rectangular or square, the anti-shake elastic part is an L-shaped structure arranged in two or more circular arrays; Wherein, a second shaping block is provided at the bending portion of the anti-shake elastic portion; Wherein, the lens of the driving device body is fixedly arranged just above the flexible circuit board; Among them, a flexible circuit board is installed in the driving device body, and a focus elastic part and an anti-shake elastic part are formed by bending and extending the flexible circuit board. The focus elastic part perpendicular to the direction of the photosensitive chip can realize the focus movement of the photosensitive chip in the vertical direction; and two symmetrically arranged anti-shake elastic parts are arranged around the peripheral side of the driving device body, and electromagnetic force is used to drive the flexible circuit board and the photosensitive chip to move on the horizontal plane to realize anti-shake; The magnet is a permanent magnet, and the anti-shake coil on the driving device body is located directly above the magnet in the Z-axis direction. When the anti-shake coil is energized, a corresponding electromagnetic force is generated and a thrust is generated between the magnet, thereby driving the flexible circuit board to move. The flexible circuit board can generate corresponding elastic deformation through the S-shaped structure and achieve the effect of resetting after the movement ends, thereby achieving the purpose of realizing the anti-shake of the photosensitive chip and the focusing of the driving device for focusing; The first shaping block is a plastic block or a foam block. One first shaping block is installed at each bending part, and the first shaping block is fixedly installed on the focusing elastic part by bonding. The first shaping block can shape the bent S-shaped structure to avoid the problem of bending and rebound of the extended flexible circuit board, thereby improving the stability of product performance. Among them, the second shaping block is a plastic part, and the second shaping block is fixedly installed by gluing. The second shaping block can be used to shape the bending part of the flexible circuit board, thereby achieving shaping of the flexible circuit board and improving the stability of the structure.

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