An anti-shake focusing structure and a camera module

Abstract

The present application proposes an anti-shake focus structure and a camera module. The anti-shake focus structure includes a housing, a lens and a chip. A focus drive unit is arranged in the housing. The focus drive unit includes an elastic bracket and a focus drive module. The elastic bracket can be elastically deformed and connected to the housing along the Z-axis direction. The chip is arranged on the elastic bracket. For the anti-shake drive unit, it only needs to drive the lens to move, and does not need to drive the focus drive unit to move. For the focus drive unit, it only needs to drive the chip, and does not need to drive the lens. Its workload is low, and this method can also effectively reduce the energy consumption of the anti-shake drive unit.

Description

Technical Field

[0001] The present invention relates to the technical field of camera module equipment, and in particular to an anti-shake focusing structure and a camera module. Background Art

[0002] At present, the optical image stabilization camera module on the market generally needs to realize the lens focus and lens image stabilization functions. The lens focus and lens image stabilization functions are all realized by the focus image stabilization drive unit driving the lens, which will make the focus image stabilization drive unit have a large workload and high energy consumption.

[0003] For example, the patent document (CN214586188U) discloses an anti-shake focus motor and its application module, which include a fixed structure, an anti-shake spring, an anti-shake structure and a focusing structure, the fixed structure includes a positioning seat and a shell; one end of the anti-shake spring is connected to the fixed structure; the anti-shake structure includes a sensor carrier, at least one group of anti-shake magnets and at least two groups of anti-shake coils, the anti-shake magnets are fixed to the inside of the shell, the sensor carrier is movably installed at the lower part of the shell, and the anti-shake coil is arranged on the sensor carrier; the anti-shake structure is connected to the other end of the anti-shake spring; the focusing structure is arranged on the sensor carrier, the focusing structure includes a lens carrier, a focusing magnet and a focusing coil, and the focusing coil is arranged on the periphery of the lens carrier.

[0004] In the above scheme, the sensor carrier is driven by the interaction between the anti-shake coil and the anti-shake magnet, and the focusing structure is arranged on the sensor carrier. The focusing structure needs to be driven simultaneously during the movement of the sensor carrier, which increases the workload of the anti-shake coil and the anti-shake magnet and results in higher energy consumption.

[0005] Therefore, it is necessary to provide a technical solution that can reduce the energy consumption of the camera module. Summary of the invention

[0006] The present invention provides an anti-shake focusing structure and a camera module, which can reduce the energy consumption of the camera module.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A shake-proof focus structure is applied to a camera module. The camera module includes a shell, a lens and a chip. The shake-proof focus structure at least includes a focus drive unit accommodated in the shell; the focus drive unit includes an elastic bracket and a focus drive module; the elastic bracket can be elastically deformed and connected to the shell along the Z-axis direction; the chip is arranged on the elastic bracket; the focus drive module connects the chip and the inner wall of the shell to drive the chip to move along the Z-axis direction.

[0009] In one embodiment, the elastic support includes a base plate and an elastic suspension plate; the shell includes a vertical wall, and the base plate is limited to the vertical wall for being fixed to an external component; one end of the elastic suspension plate is connected to the base plate, and the other end of the elastic suspension plate is arranged to be a U-shape with an opening toward the base plate; the chip is arranged at the free end of the elastic suspension plate.

[0010] In one embodiment, the elastic suspension plate includes an upper half section, a lower half section, and a vertical section;

[0011] One end of the upper section is fixed to the base plate, the other end of the upper section is fixed to the top of the vertical section, and a window is provided in the upper section; the lower section is spaced below the upper section, one end of the lower section is connected to the bottom end of the vertical section, and the other end of the lower section is suspended; the U-shape is composed of the upper section, the vertical section and the lower section;

[0012] The chip is arranged on the top wall of the lower half; the chip and the window are located on the optical axis of the lens.

[0013] In one embodiment, the chip is slidably connected to the vertical wall of the housing via a guide structure so as to reciprocate along the Z axis.

[0014] In one embodiment, the guide structure includes a first strip groove, a second strip groove and a guide ball; the first strip groove is opened on the vertical wall of the shell; the second strip groove is opened on the side wall of the vertical section opposite to the chip; the two side walls opposite to the guide ball can respectively slidably abut the first strip groove and the second strip groove.

[0015] In one embodiment, it further includes an anti-shake driving unit housed in the housing, the lens is disposed on the anti-shake driving unit, and the anti-shake driving unit drives the lens to move in a direction perpendicular to the Z axis.

[0016] In one embodiment, the anti-shake drive unit includes a stator module, a movable module, a spring group and an anti-shake drive module; the stator module includes a cavity through which the upper and lower ends pass; the movable module is movably and elastically resettably suspended in the cavity through the spring group; the anti-shake drive module connects the movable module and the stator module to drive the movable module to move relative to the stator module in a direction perpendicular to the Z axis; the lens is arranged on the movable module.

[0017] In one embodiment, the spring clip group includes a plurality of spring clips circumferentially spaced around the mover module; the spring clip includes a mover connection portion connected to the mover module, a stator connection portion connected to the stator module, and an elastic portion connecting the stator connection portion and the mover connection portion; the elastic portion is located between the stator module and the mover module.

[0018] In one embodiment, the elastic portion includes two parallel rods and a connecting section that connects the two rods and extends in a curved manner; the mover connecting portion and the stator connecting portion are respectively connected to the two rods; the two rods and the connecting section are located in the same plane.

[0019] In one embodiment, the number of spring sheets configured is four; the four spring sheets are arranged in a rectangular shape; the elastic parts of the two spring sheets located on the diagonal of the rectangle are parallel to each other; and the two elastic parts located on the diagonal of the rectangle are set at an angle with the diagonal of the rectangle.

[0020] In one embodiment, the anti-shake drive module includes a ring mounted on the mover module and four anti-shake drive groups arranged in a rectangle around the ring; the anti-shake drive group includes an anti-shake drive coil fixedly connected to the ring and an anti-shake magnet fixedly connected to the inner wall of the cavity.

[0021] A camera module comprises a shell, a lens, a chip and the above-mentioned anti-shake focusing structure; the anti-shake focusing structure is accommodated in the shell, and the relative positions of the lens and the chip are driven by the anti-shake focusing structure to achieve focusing and anti-shake of the camera module.

[0022] The beneficial effects of the present invention are:

[0023] For the focus drive unit, it only needs to drive the chip to move along the Z axis, and does not need to drive the lens to move. By the above method, the workload of the focus drive unit can be reduced, thereby effectively reducing the energy consumption of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but should not constitute a limitation of the present invention.

[0025] Figure 1 Schematic diagram of the structure of a camera module according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the combined structure of a camera module according to an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the combined structure of an anti-shake driving unit according to an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the combined structure of the stator module, the mover module, the anti-shake drive module and the spring piece according to an embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the combined structure of the stator module, the mover module, the anti-shake drive module and the spring piece according to an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the combined structure of the mover module, the anti-shake driving module and the spring piece according to an embodiment of the present invention;

[0031] Figure 7A schematic diagram of the structure of a spring piece according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the positional relationship between the elastic part and the mover module of an embodiment of the present invention;

[0033] Fig. 9 is a structural schematic diagram of a focus driving unit according to an embodiment of the present invention;

[0034] Fig.10 A schematic diagram of the combined structure of a focus drive unit according to an embodiment of the present invention;

[0035] Fig.11 This is a schematic diagram of the combined structure of the chip and the lower shell according to an embodiment of the present invention;

[0036] Fig.12 It is a schematic diagram of the state of the elastic suspension plate and the base plate according to an embodiment of the present invention;

[0037] Fig.13 It is a schematic diagram of the state of the elastic suspension plate and the base plate according to an embodiment of the present invention;

[0038] Fig.14 Schematic diagram of the elastic suspension plate and the base plate according to an embodiment of the present invention.

[0039] Notes on the attached drawings:

[0040] 10. Shell; 11. Upper shell; 12. Lower shell;

[0041] 20. Lens;

[0042] 30. chip; 31. chip support plate; 32. chip body;

[0043] 40. Anti-shake drive unit; 41. Top cover; 42. Stator module; 421. Cavity; 43. Mover module; 441. Anti-shake magnet; 442. Ring; 443. Anti-shake coil; 47. Elastic sheet; 471. Stator connection part; 472. Mover connection part; 473. Elastic part; 4731. Rod; 4732. Connecting section;

[0044] 50, focus drive unit; 51, elastic suspension plate; 511, upper section; 512, vertical section; 513, lower section; 514, window; 52, base plate; 53, focus drive group; 531, focus coil; 532, focus magnet;

[0045] 60. Guide structure; 61. Second strip groove; 62. Guide ball; 63. First strip groove; 64. Vertical wall. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0047] This embodiment discloses a camera module, which can be applied to shooting electronic devices such as mobile phones, drones, and cameras.

[0048] See also Figure 1 - Figure 2 The camera module includes a housing 10, a lens 20, a chip 30, and an anti-shake and focus structure accommodated in the housing 10. The anti-shake and focus structure includes an anti-shake drive unit 40 and a focus drive unit 50, which are sequentially arranged in the housing 10 from top to bottom.

[0049] The lens 20 is arranged on the anti-shake driving unit 40. The anti-shake process of the camera module includes: the anti-shake driving unit 40 drives the lens 20 to move along the direction perpendicular to the Z axis to compensate for the displacement of the lens 20, thereby realizing the anti-shake of the camera module.

[0050] The chip 30 is arranged in the focus driving unit 50. The chip 30 is provided with a photosensitive element. Light enters the camera module from the lens 20 and finally reaches the chip 20. With the assistance of the photosensitive element, the camera module generates an image signal. The camera module focusing process includes: the position of the lens 20 in the Z-axis direction remains unchanged, and the focus driving unit 50 drives the chip 30 to move back and forth along the Z-axis to change the distance between the chip 30 and the lens 20 to achieve the focusing of the camera module.

[0051] Compared with the prior art, the anti-shake drive unit 40 and the focus drive unit 50 of this embodiment are independently arranged from top to bottom, and the actuation processes of the anti-shake drive unit 40 and the focus drive unit 50 do not interfere with each other. For the anti-shake drive unit 40, it only needs to drive the lens 20 to move in the direction perpendicular to the Z axis, and there is no need to drive the focus drive unit 50. Similarly, for the focus drive unit 50, it only needs to drive the chip 30 to move along the Z axis, and there is no need to drive the anti-shake drive unit 40 to move. By means of the aforementioned method, the workload of the focus drive unit 50 and the anti-shake drive unit 40 can be reduced, which can effectively reduce the energy consumption of the camera module. Please combine Figure 3 , Figure 4 and Figure 5The anti-shake drive unit 40 includes a stator module 42, a movable module 43, a spring group and an anti-shake drive module. The stator module 42 is provided with a cavity 421 through which the upper and lower ends are connected. The spring group connects the movable module 43 and the stator module 42. The movable module 43 is movably and elastically resetably suspended in the cavity 421 through the spring group. The anti-shake drive module connects the movable module 43 and the stator module 42 to drive the movable module 43 to move relative to the stator module 42 in a plane perpendicular to the Z axis, that is, to move in a plane perpendicular to the optical axis of the camera module. The lens 20 is arranged on the movable module 43. When the anti-shake drive module drives the movable module 43 to move, the movable module 43 drives the lens 20 to move in a plane perpendicular to the Z axis. In this embodiment, the movable module 43 drives the lens 20 to move linearly along the X-axis, linearly along the Y-axis, or rotationally around the Z-axis, etc., so as to compensate for the displacement of the lens 20 and realize the anti-shake of the camera module. For details, please refer to Figure 6 When the anti-shake driving module provides the moving submodule 43 with a force along the X-axis, i.e., a force in the F1 direction, the moving submodule 43 moves in the F1 direction. When the anti-shake driving module drives the moving submodule 43 to move along the Y-axis, i.e., a force in the F2 direction, the moving submodule 43 moves in the F2 direction. When the anti-shake driving module provides the moving submodule 43 with forces in both the F1 and F2 directions, the moving submodule 43 can move in the F3 direction under the combined action of the forces in the F1 direction and the F2 direction. When one side of the moving submodule 43 is subjected to a force in the F1 direction, and the other side of the moving submodule 43 is subjected to a force in the opposite direction to the F1 direction, and the magnitudes of the two forces are inconsistent, the moving submodule 43 can be caused to rotate along the Z-axis.

[0052] In this embodiment, the spring sheet group only needs to suspend the moving submodule 43 in the cavity 421 of the stator module 42, without suspending the focus drive unit 50, which can reduce the workload of the spring sheet group. Therefore, in the process of producing the camera module, a spring sheet group with a smaller elastic coefficient can be selected, so that the spring sheet group can maintain sufficient deformation elastic force to force the moving submodule 43 to return to its original position while reducing the power required to drive the moving submodule 43. In this way, the energy consumption of the anti-shake drive unit 40 can also be effectively reduced.

[0053] Next, the structure of the anti-shake and focus structure of this embodiment is further described.

[0054] Please continue reading Figure 2 In this embodiment, the housing 10 includes an upper housing 11 and a lower housing 12. The upper housing 11 is provided with a through hole for the lens 20 to be exposed outside the housing 10. The upper housing 11 and the lower housing 12 are plugged together, so that an inner cavity for installing the anti-shake drive unit 40 and the focus drive unit 50 is formed in the housing 10.

[0055] Please continue reading Figure 3The anti-shake drive unit 40 further includes a top cover 41. The top cover 41 is a cubic cover, and the stator module 42 is a square frame. The shapes of the stator module 42 and the top cover 41 are adapted. The top cover 41 is provided on the stator module 42. The cavity 421 of the stator module 42 is cubic. In other embodiments, the cavity 421 of the stator module 42 can also be designed to be cylindrical, prismatic, etc.

[0056] In this embodiment, the top cover 41 and the cavity 421 of the stator module 42 define a cubic installation space for installing the mover module 43 and the anti-shake drive module. The mover module 43, the anti-shake drive module and the spring assembly are confined in the installation space, so that the anti-shake drive unit 40 can form an integral body independent of the outside world, which is convenient for its overall disassembly and assembly. In other embodiments, the stator module 42 is designed to be cylindrical or other cylindrical in shape according to actual needs, and the top cover 41 can be designed to be compatible with the shape of the stator module 42.

[0057] Please combine Figure 2 and Figure 3 In this embodiment, the top wall of the top cover 41 abuts against the inner wall of the upper shell 11, and the bottom wall of the stator module 42 abuts against the top wall of the focus drive unit 50, so that the displacement of the anti-shake drive unit 40 on the Z axis is limited by the upper shell 11 and the focus drive unit 50.

[0058] In this embodiment, the mover module 43 is in a cubic shape. In other embodiments, the mover module 43 can also be designed in a cylindrical or polygonal shape, as long as its shape is compatible with the shape of the cavity 421 of the stator module 42. The mover module 43 is provided with an assembly hole, and the lens 20 is mounted on the assembly hole.

[0059] Please combine Figure 5 and Figure 6 In this embodiment, the anti-shake drive module includes a frame-shaped ring 442 mounted around the mover module 43 and four anti-shake drive groups arranged between the stator module 42 and the ring 442. The positions of the four anti-shake drive groups correspond to the positions of the four side walls of the ring 442 in the circumferential direction. The anti-shake drive group includes an anti-shake coil 443 fixedly connected to the side wall of the ring 442 and an anti-shake magnet 441 fixedly connected to the inner wall of the cavity 421.

[0060] When the anti-shake coil 443 is energized, according to the right-hand rule, the anti-shake coil 443 and the anti-shake magnet 441 have an attractive or repulsive force, thereby driving the collar 442 and the mover module 43 to move in the plane where the X-Y axis is located, and performing displacement compensation on the lens 20 carried by the mover module 43 to achieve anti-shake of the lens 20. In other embodiments, the positions of the anti-shake coil 443 and the anti-shake magnet 441 can be interchanged. In other embodiments, the anti-shake magnet 441 can also be replaced with a conductive coil. In other embodiments, the configuration number of the anti-shake drive group can be three or more, and its arrangement position can also be adaptively changed, as long as the collar 442 and the mover module 43 can be driven to move in a direction perpendicular to the Z axis, such as moving along the X axis or moving or rotating along the Y axis.

[0061] See also Figure 4 and Figure 7 In this embodiment, the spring sheet group includes a plurality of spring sheets 47 that are circumferentially spaced around the moving submodule 43. Preferably, the number of spring sheets 47 is four, and the four spring sheets 47 are respectively connected to different parts of the moving submodule 43 and the stator module 42, so as to suspend the moving submodule 43 in the cavity 421 of the stator module 42. In other embodiments, the number of spring sheets 47 can also be three or more, as long as the moving submodule 43 can be suspended in the cavity 421 of the stator module 42.

[0062] The spring piece 47 includes an elastic part 473, a stator connection part 472 and a mover connection part 471. Preferably, the mover connection part 471 and the stator connection part 472 are both in sheet shape, and the mover connection part 471 is attached to and fixed to the top wall of the mover module 43. The stator connection part 472 is attached to and fixed to the top wall of the stator module 42. The elastic part 473 connects the stator connection part 472 and the mover connection part 471, and the elastic part 473 extends downward to the gap between the mover module 43 and the stator module 42, so that the elastic part 473 is hidden between the mover module 43 and the stator module 42, thereby improving the overall structural compactness of the anti-shake drive unit 40. The elastic part 473 has a certain elasticity. After the mover module 43 moves relative to the stator module 42, the elastic part 473 is stretched or compressed, so that the elastic part 473 forms a deformation elastic force, and the deformation elastic force of the elastic part 473 can force the mover module 43 to return to its original position.

[0063] The elastic part 473 includes two rods 4731 arranged in parallel and a connecting section 4732. The connecting section 4732 is bent and extended along the parallel direction of the two rods 4731, and such a structure can make the connecting section 4732 elastic. The two ends of the connecting section 4732 are respectively connected to the two rods 4731. The mover connecting part 471 and the stator connecting part 472 are respectively connected to the two rods 4731. When the mover module 43 moves, the connecting section 4732 is stretched or compressed by the two rods 4731, so that the connecting section 4732 forms a deformation elastic force, and the deformation elastic force can force the mover module 43 to return to its original position.

[0064] The connecting section 4732 can be connected to any part of the rod 4731. Preferably, the two ends of the connecting section 4732 are respectively connected to one end of the two rods 4731, and the mover connecting part 471 and the stator connecting part 472 are respectively connected to the other ends of the two rods 4731. Such a structure can increase the long arm of the rod 4731, so that the rod 4731 also has greater elasticity, thereby increasing the overall elasticity of the elastic part 473.

[0065] In this embodiment, the two rods 4731 and the connecting section 4732 are located in the same plane, which can reduce the space required for installing the elastic portion 473 and facilitate the installation of the elastic portion 473 into the gap between the mover module 43 and the stator module 42.

[0066] Preferably, the connecting section 4732 includes at least one "J" shape, and such a structure is easy to process. In other embodiments, the connecting section 4732 can also extend in a wave shape or in other curved shapes, as long as the connecting section 4732 has elasticity.

[0067] In this embodiment, the four spring pieces 47 are arranged in a rectangular shape, so that the deformation elastic force applied by the spring piece group to the mover module 43 is more uniform, thereby improving the stability of the mover module 43 during movement.

[0068] Further, the elastic parts 473 of the two spring pieces 47 located on the diagonal line of the rectangle are parallel to each other, and the two elastic parts 473 located on the diagonal line of the rectangle are arranged at an angle with the diagonal line of the rectangle. Figure 8 , Figure 8 Schematic diagram of the positional relationship between the elastic part 473 and the mover module 43. The two elastic parts 473 located on the diagonal of the rectangle are perpendicular to the diagonal of the rectangle. When the mover module 43 rotates, the direction of the pulling force or the compressive force on the elastic part 473 is highly matched with the length direction of the connecting section 4732, so that the connecting section 4732 can be stretched or compressed more easily and more fully, so as to obtain a better elastic deformation force.

[0069] Furthermore, since the corners of the mover module 43 are offset from the positions of the anti-shake coil 443 and the anti-shake magnet 441, there is a large gap between the corners of the mover module 43 and the stator module 42. The positions of the four springs 47 of this embodiment correspond to the four corners of the mover module 43, so that the elastic part 473 is located in the gap between the corners of the mover module 43 and the stator module 42, so that a large installation space can be reserved for the elastic part 473, so that the elastic part 473 can be more fully elastically deformed.

[0070] See also Fig. 9 and Fig.10 In this embodiment, the focus driving unit 50 includes an elastic bracket and a focus driving module. The elastic bracket includes a base plate 52 and an elastic suspension plate 51.

[0071] The housing 10 includes a vertical wall 64 extending along the Z-axis direction, and the base plate 52 is limited to the vertical wall 64 of the housing 10 to be fixedly connected to an external component. Figure 2 The vertical wall 64 is formed by the side wall of the lower shell 12, and the base plate 52 is clamped between the side walls of the upper shell 11 and the lower shell 12, and the base plate 52 is positioned by the side walls of the upper shell 11 and the lower shell 12. The vertical wall 64 of the housing 10 can be formed by one of the vertically arranged side walls of the lower shell 12.

[0072] Please continue reading Figure 2 , Fig. 9 and Fig.10 The elastic suspension plate 51 is connected to the base plate 52 and can be suspended in the housing 10 in an elastically deformable manner along the Z-axis direction. The focus driving module acts on the elastic suspension plate 51 to drive the elastic suspension plate 51 to reciprocate along the Z-axis. The chip 30 is fixed to the elastic suspension plate 51, and the chip 30 moves along the Z-axis together with the elastic suspension plate 51, thereby changing the distance between the chip 30 and the lens 20 to achieve focusing of the lens 20.

[0073] For further information, see Fig. 9 Preferably, one end of the elastic suspension plate 51 is connected to the base plate 52, and the other end of the elastic suspension plate 51 is suspended; the elastic suspension plate 51 is in a U-shape with an opening toward the base plate 52; specifically, the opening of the U-shape faces the vertical wall 64. The chip 30 is disposed at the free end of the elastic suspension plate 51, and the free end of the elastic suspension plate 51 is also the end of the elastic suspension plate 51.

[0074] The elastic suspension plate 51 includes an upper section 511, a lower section 513 and a vertical section 512. One end of the upper section 511 is fixedly connected to the base plate 52, and the other end of the upper section 511 is fixedly connected to the top of the vertical section 512. The lower section 513 is spaced below the upper section 511, one end of the lower section 513 is connected to the bottom end of the vertical section 512, and the other end of the lower section 513 is suspended. The aforementioned U-shape is composed of the upper section 511, the vertical section 512 and the lower section 513. The chip 30 is fixedly connected to the lower section 513. The focus drive module acts on the lower section 513 or the chip 30, so that the chip 30 moves up and down along the Z axis together with the lower section 513.

[0075] See also Fig.12 and Fig.13 , Fig.12 The structure state of the elastic suspension plate 51 when not in operation is shown. Fig.13 The structural state diagram when the elastic suspension plate 51 moves upward is shown. When the focus drive module drives the lower section 513 to move upward, the lower section 513 will flip upward with the bottom end of the vertical section 512 as the fulcrum, so that the lower section 513 is tilted. At the same time, under the push of the vertical section 512, the upper section 511 also flips upward with the base plate 52 as the fulcrum, so that the upper section 511, together with the vertical section 512 and the lower section 513, tilts together. At this time, the previous tilt state of the lower section 513 is corrected, so that the lower section 513 can still maintain a relatively horizontal state after moving along the Z axis, and the chip 30 can also maintain a relatively horizontal state at this time, thereby improving the focusing accuracy of the lens 20.

[0076] See also Fig.14 When the focus driving module drives the lower section 513 to move downward, the lower section 513 will flip downward with the bottom end of the vertical section 512 as the fulcrum, so that the lower section 513 is tilted. At the same time, under the pull of the vertical section 512, the upper section 511 will also flip downward with the base plate 52 as the fulcrum, so that the upper section 511, together with the vertical section 512 and the lower section 513, are tilted. At this time, the previous tilt state of the lower section 513 is corrected, so that the lower section 513 can still maintain a relatively horizontal state after moving along the Z axis, and the chip 30 can also maintain a relatively horizontal state at this time, thereby improving the focusing accuracy of the lens 20.

[0077] Please continue reading Fig.10 and Fig.11In this embodiment, the side wall of the chip 30 facing away from the vertical section 512 can be slidably connected to the vertical wall 64 of the housing 10 through a guide structure 60 so as to reciprocate along the Z axis. When the lower section 513 moves upward or downward along the Z axis, the lower section 513 drives the chip 30 to move, and the side wall of the chip 30 away from the vertical section 512 can slide up and down along the vertical wall 64 of the housing 10 through the guide structure 60, so that the sliding process of the chip 30 is relatively stable, thereby improving the stability of the movement of the chip 30 and improving the focusing accuracy of the lens 20.

[0078] Preferably, the guide structure 60 includes a first strip groove 63, a second strip groove 61 and a guide ball 62. The first strip groove 63 is provided on the vertical wall 64 of the housing 10, and specifically, the first strip groove 63 is provided on the inner wall of the lower housing 12. The second strip groove 61 is provided on the side wall of the chip 30 facing away from the vertical section 512. The two side walls opposite to the guide ball 62 are respectively slidably abutted against the first strip groove 63 and the second strip groove 61. Such a structure is simple and compact, easy to assemble, and conducive to reducing the overall volume of the focus drive unit 50.

[0079] Furthermore, the upper half 511 is provided with a window 514, and the chip 30, the window 514 and the cavity 421 are located on the optical axis of the lens 20, so that the external light can pass through the lens 20, the cavity 421 and the window 514 in sequence, and finally reach the chip 30, so that the chip 30 senses the light to form an image. The shape of the window 514 can be set according to actual needs, as long as it can avoid the light and allow the light to propagate between the chip 30 and the lens 20, and the shape of the window 514 is not limited here.

[0080] The chip 30 includes a chip body 32 and a chip support plate 31. The chip body 32 is fixed to the chip support plate 31. The chip support plate 31 is fixed to the lower half 513. The second strip groove 61 is provided on the chip support plate 31. The focus driving module connects the chip support plate 31 and the inner wall of the housing 10. The focus driving module drives the chip support plate 31 to move along the Z axis, and the chip support plate 31 drives the elastic suspension plate 51 to undergo elastic deformation.

[0081] Preferably, the focus drive module includes two focus drive groups 53 symmetrically arranged on opposite sides of the chip support plate 31, and the focus drive group 53 is located between the chip support plate 31 and the vertical inner wall of the lower shell 12. The focus drive group 53 includes a focus coil 531 fixedly connected to the chip support plate 31 and a focus magnet 532 fixedly connected to the inner wall of the lower shell 12. According to the principle of the left-hand rule, when the focus coil 531 is energized, the focus coil 531 generates an Ampere force, which can be used to drive the focus coil 531 to move along the Z axis, so that the chip support plate 31 and the chip 30 are driven by the focus coil 531 to move along the Z axis, so as to complete the focusing of the lens 20.

[0082] In other embodiments, the focusing magnet 532 can also be set on the bottom wall inside the lower shell 12, and the focusing coil 531 can be set on the bottom wall of the lower half 513. The length of the focusing coil 531 can be appropriately shortened. According to the right-hand rule, when the focusing coil 531 is energized, an attractive force or a repulsive force is generated between the focusing coil 531 and the focusing magnet 532, and the attractive force or the repulsive force is used to drive the focusing coil 531 to move along the Z axis. Although such a solution can drive the chip 30 to move, it will increase the height of the camera module in the Z-axis direction, and the camera module is larger in size.

[0083] The anti-shake principle of the camera module of this embodiment includes:

[0084] The camera module includes a control module for controlling its own operation. When the shooting device shakes, the displacement sensor in the camera module can sense the shaking, and the control module of the camera module controls the anti-shake coil 443 to be energized according to the amplitude and direction of the shaking. After the anti-shake coil 443 is energized, it generates magnetic force, so that the anti-shake coil 443 and the anti-shake magnet 441 attract or repel each other, thereby moving the anti-shake coil 443 in the direction perpendicular to the Z axis. In this process, the anti-shake coil 443 drives the moving submodule 443 to move, and the moving submodule 443 drives the lens 20 to move, and the displacement compensation of the lens 20 is performed, and finally the camera module anti-shake is realized.

[0085] The focusing principle of the camera module of this embodiment includes:

[0086] Keep the position of the lens 20 unchanged in the Z-axis direction; the control module of the camera module controls the focus coil 531 to be energized, and the magnetic force generated by the focus magnet 532 drives the focus coil 531 to move back and forth along the Z-axis; in this process, the focus coil 531 drives the chip support plate 31 to move along the Z-axis, and the chip support plate 31 drives the chip 30 to move along the Z-axis, thereby changing the distance between the chip 30 and the lens 20, and realizing the focus of the camera module.

[0087] The anti-shake process of the camera module of this embodiment and the focusing process of the camera module can be performed simultaneously or independently.

[0088] As long as it does not violate the creative ideas of the present invention, any combination of the various embodiments of the present invention shall be regarded as the contents disclosed by the present invention; within the technical concept of the present invention, any combination of various simple modifications of the technical scheme and different embodiments that does not violate the creative ideas of the present invention shall be within the protection scope of the present invention.

Claims

1. An anti-shake focus structure, applied to a camera module, the camera module comprising a housing (10), a lens (20) and a chip (30), characterized in that: The anti-shake focus structure at least comprises a focus drive unit (50) accommodated in the housing (10); the focus drive unit (50) comprises an elastic bracket and a focus drive module; the elastic bracket can be elastically deformed and connected to the housing (10) along the Z-axis direction; the chip (30) is arranged on the elastic bracket; the focus drive module is connected to the chip (30) and the inner wall of the housing (10) to drive the chip (30) to move along the Z-axis direction; the elastic bracket comprises a base plate (5 2) and an elastic suspension plate (51); the shell (10) includes a vertical wall (64), and the base plate (52) is limited to the vertical wall (64) for being fixedly connected to an external component; one end of the elastic suspension plate (51) is connected to the base plate (52), and the other end of the elastic suspension plate (51) is suspended, and the shape of the elastic suspension plate (51) is U-shaped with an opening toward the vertical wall (64); the chip (30) is arranged at the free end of the elastic suspension plate (51).

2. The anti-shake focusing structure according to claim 1, characterized in that: The elastic suspension plate (51) comprises an upper section (511), a lower section (513) and a vertical section (512); One end of the upper section (511) is fixedly connected to the base plate (52), and the other end of the upper section (511) is fixedly connected to the top of the vertical section (512), and the upper section (511) is provided with a window (514); the lower section (513) is spaced below the upper section (511), one end of the lower section (513) is connected to the bottom end of the vertical section (512), and the other end of the lower section (513) is suspended; the U-shape is composed of the upper section (511), the vertical section (512) and the lower section (513); The chip (30) is arranged on the top wall of the lower half (513); the chip (30) and the window (514) are located on the optical axis of the lens.

3. The anti-shake focusing structure according to claim 2, characterized in that: The chip (30) is slidably connected to the vertical wall (64) of the housing (10) via a guide structure (60) so as to reciprocate along the Z axis.

4. The anti-shake focusing structure according to claim 3, characterized in that: The guide structure (60) includes a first strip groove (63), a second strip groove (61) and a guide ball (62); the first strip groove (63) is opened on the vertical wall (64) of the shell (10); the second strip groove (61) is opened on the side wall of the chip (30) facing away from the vertical section (512); the two side walls opposite to each other of the guide ball (62) can slide against the first strip groove (63) and the second strip groove (61) respectively.

5. The anti-shake focusing structure according to claim 1, characterized in that: The invention also comprises an anti-shake driving unit (40) accommodated in the shell (10), the lens (20) being arranged on the anti-shake driving unit (40), and the lens (20) being driven by the anti-shake driving unit (40) to move in a direction perpendicular to the Z axis; the anti-shake driving unit (40) comprises a stator module (42), a movable module (43), a spring sheet group and an anti-shake driving module; the stator module (42) is provided with a cavity (421) through which the upper and lower ends are connected; the movable module (43) is suspended in the cavity (421) in a movable and elastically resettable manner through the spring sheet group; the anti-shake driving module is connected to the movable module (43) and the stator module (42) to drive the movable module (43) to move relative to the stator module (42) in a direction perpendicular to the Z axis; the lens (20) is arranged on the movable module (43).

6. The anti-shake focusing structure according to claim 5, characterized in that: The spring sheet group comprises a plurality of spring sheets (47) arranged at intervals in the circumferential direction around the mover module (43); the spring sheet (47) comprises a mover connection portion (472) connected to the mover module (43), a stator connection portion (471) connected to the stator module (42), and an elastic portion (473) connecting the stator connection portion (471) and the mover connection portion (472); the elastic portion (473) is located between the stator module (42) and the mover module (43); the elastic portion (473) comprises two rods (4731) arranged in parallel and a connecting section (4732) connecting the two rods (4731) and extending in a bent manner; the mover connection portion (472) and the stator connection portion (471) are respectively connected to the two rods (4731); the two rods (4731) and the connecting section (4732) are located in the same plane.

7. The anti-shake focusing structure according to claim 6, characterized in that: The number of the spring sheets (47) is four; the four spring sheets (47) are arranged in a rectangular shape; the elastic parts (473) of the two spring sheets (47) located on the diagonal line of the rectangle are parallel to each other; and the two elastic parts (473) located on the diagonal line of the rectangle are arranged at an angle with the diagonal line of the rectangle.

8. The anti-shake focusing structure according to claim 5, characterized in that: The anti-shake drive module comprises a collar (442) sleeved on a mover module (43) and four anti-shake drive groups arranged in a rectangular shape around the collar; the anti-shake drive group comprises an anti-shake drive coil (443) fixedly connected to the collar (442) and an anti-shake magnet (441) fixedly connected to the inner wall of the cavity (421).

9. A camera module, characterized in that: It comprises a shell (10), a lens (20), a chip (30) and an anti-shake focus structure as described in any one of claims 1 to 8; the anti-shake focus structure is accommodated in the shell (10), and the relative positions of the lens (20) and the chip (30) are driven by the anti-shake focus structure to achieve focusing and anti-shake of the camera module.

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