An anti-shake focusing structure and a camera module

Abstract

The present application proposes an anti-shake focus structure and a camera module. The camera module includes a shell, a lens and a chip. The anti-shake focus structure includes an anti-shake drive unit and a focus drive unit housed in the shell; the chip is arranged in the focus drive unit; the anti-shake drive unit includes a stator module, a mover module, a sliding structure, an elastic reset component and an anti-shake drive module; the stator module includes a cavity; the cavity includes a bottom plate extending along its own radial direction; the bottom plate is supported by the sliding structure and slides the mover module; the anti-shake drive module is used to drive the mover module to slide along the bottom plate; the elastic reset component is used to force the mover module to return to its original position after the mover module moves; the lens is arranged in the mover module. The present application can reduce the workload of the focus drive unit and the anti-shake drive unit, and can also reduce the workload of the elastic reset component, and can also reduce the resistance encountered during the movement of the mover module, thereby effectively reducing the energy consumption of the anti-shake drive unit.

Description

Technical Field

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

[0002] At present, the optical image stabilization camera modules on the market generally need to realize the lens focus and lens image stabilization functions. The lens focus and lens image stabilization functions generally need to be realized by the focus image stabilization drive unit. The focus image stabilization drive unit drives the lens to move along the X-axis, Y-axis or Z-axis direction. If necessary, it is also necessary to drive the lens to move in the three directions of X-axis, Y-axis and Z-axis. This will cause a large load on the focus image stabilization drive unit 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] In addition, the anti-shake spring needs to drive the sensor carrier and the focus structure to return to their original positions at the same time, which increases the workload of the anti-shake spring. The anti-shake spring needs a larger elastic coefficient (also called stiffness coefficient) to provide sufficient deformation elastic force to drive the sensor carrier and the focus structure. However, if the elastic coefficient of the anti-shake spring is large, the power required to drive the sensor and the focus structure will increase, which will undoubtedly increase the energy consumption of the camera module.

[0006] Therefore, it is necessary to provide a technical solution that can reduce the energy consumption of the camera module. Summary of the invention

[0007] The present invention provides an anti-shake focusing structure and a camera module, which can reduce the energy consumption of the camera module.

[0008] The technical solution adopted by the present invention is as follows:

[0009] An anti-shake focus structure is applied to a camera module, the camera module comprises a housing, a lens and a chip, and the anti-shake focus structure comprises an anti-shake drive unit and a focus drive unit sequentially accommodated in the housing from top to bottom;

[0010] The chip is arranged in the focus driving unit, and the chip is suspended in the housing through the focus driving unit, and the chip is driven to move along the Z axis by the focus driving unit;

[0011] The anti-shake drive unit includes a stator module, a mover module, a sliding structure, an elastic reset component and an anti-shake drive module; the stator module supports the mover module through the sliding structure, and is slidingly connected with the mover module through the sliding structure; the anti-shake drive module connects the mover module and the stator module to drive the mover module to slide relative to the stator module; the elastic reset component connects the mover module and the stator module to force the mover module to return to its original position after the mover module moves; the lens is arranged on the mover module.

[0012] In one embodiment, the stator module is provided with a cavity with upper and lower ends penetrating therethrough; the lower port of the cavity includes a bottom plate extending along its own radial direction; the mover module is located in the cavity; and the sliding structure is provided on the bottom plate.

[0013] In one embodiment, the sliding structure includes a groove group opened on the top wall of the bottom plate and a ball group installed in the groove group; the ball group is partially exposed from the groove group, and its exposed part abuts against the bottom wall of the moving submodule.

[0014] In one embodiment, the groove set includes at least three grooves; the ball set includes at least three balls, and each groove is equipped with at least one ball.

[0015] In one embodiment, the notch area of ​​the groove is greater than or equal to the maximum cross-sectional area of ​​the ball, and the ball is mounted in the groove in a rolling manner or in a fixed position.

[0016] In one embodiment, the elastic reset assembly includes at least one elastic sheet, which 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 mover connection portion and the stator connection portion; the elastic portion is located between the stator module and the mover module.

[0017] In one embodiment, the mover module is columnar or plate-shaped and has a circumferential side wall arranged around its own axial direction; the number of elastic sheets is at least two, and all elastic sheets are located in a plane perpendicular to the axial direction of the mover module; the elastic parts are extended along the contour of the circumferential side wall and are spaced from the circumferential side wall; the positive projections formed by adjacent elastic parts on the mover module partially overlap.

[0018] In one embodiment, 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.

[0019] 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 fixedly connected 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 suspended, and the shape of the elastic suspension plate is U-shaped with an opening toward the vertical wall; the chip is arranged at the free end of the elastic suspension plate.

[0020] In one embodiment, the elastic suspension plate includes an upper half section, a lower half section, and a vertical section;

[0021] 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;

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The beneficial effects of the present invention are:

[0027] The anti-shake drive unit and the focus drive unit of the present application are independently arranged from top to bottom, and the actuation processes of the anti-shake drive unit and the focus drive unit do not interfere with each other. For the anti-shake drive unit, it only needs to drive the lens to move, and there is no need to drive the focus drive unit to move. Similarly, for the focus drive unit, it only needs to drive the chip to move along the Z axis, and there is no need to drive the anti-shake drive unit to move. By means of the aforementioned method, the workload of the focus drive unit and the anti-shake drive unit can be reduced, which can effectively reduce the energy consumption of the camera module.

[0028] In addition, the stator module supports the mover module through a sliding structure and is slidingly connected to the mover module; the elastic reset component only needs to provide deformation elastic force to force the mover module to its original position, and does not need to bear the weight of the mover module. This can reduce the workload of the elastic reset component. Therefore, in the process of producing the camera module, an elastic reset component with a smaller elastic coefficient can be selected. In this way, the elastic reset component can maintain sufficient deformation elastic force to force the mover module to return to its original position while reducing the resistance encountered during the movement of the mover module. In this way, the energy consumption of the anti-shake drive unit can also be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 Schematic diagram of the structure of a camera module according to an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the combined structure of a camera module according to an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the combined structure of an anti-shake drive unit and a lens according to an embodiment of the present invention;

[0033] Figure 4 It is a structural schematic diagram of an elastic reset assembly according to an embodiment of the present invention;

[0034] Figure 5 is a structural schematic diagram of a focus driving unit according to an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of the combined structure of a focus drive unit according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the combined structure of the chip and the lower shell according to an embodiment of the present invention;

[0037] Figure 8 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. 9 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;

[0039] Fig.10 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;

[0040] Fig.11 It is a schematic diagram of the combined structure of the elastic sheet and the mover module according to other embodiments of the present invention.

[0041] Notes on the attached drawings:

[0042] 10. Shell; 11. Upper shell; 12. Lower shell;

[0043] 20. Lens;

[0044] 30. chip; 31. chip support plate; 32. chip body;

[0045] 40. Anti-shake drive unit; 41. Top cover; 42. Stator module; 421. Cavity; 422. Bottom plate; 43. Mover module; 441. Anti-shake magnet; 442. Ring; 443. Anti-shake coil; 47. Elastic reset assembly; 471. Elastic sheet; 4711. Stator connection part; 4712. Mover connection part; 4713. Elastic part; 4713a. First section; 4713b. Second section;

[0046] 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;

[0047] 60. guide structure; 61. second strip groove; 62. guide ball; 63. first strip groove; 64. vertical wall;

[0048] 70. Sliding structure; 71. Groove; 72. Ball. DETAILED DESCRIPTION

[0049] 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.

[0050] The present embodiment discloses a camera module, which can be applied to shooting electronic devices such as mobile phones, drones, and cameras.

[0051] See also Figure 1 and Figure 2 The camera module includes a housing 10, a lens 20, a chip 30 and an anti-shake focus structure. The anti-shake focus structure includes an anti-shake drive unit 40 and a focus drive unit 50 which are sequentially accommodated in the housing 10 from top to bottom.

[0052] 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.

[0053] The chip 30 is arranged in the focus driving unit 50, and a photosensitive element is arranged on the chip 30. Light enters the camera module from the lens 20 and finally reaches the chip 20. With the help of the photosensitive element, the camera module generates an image signal. The focusing process of the camera module includes: the position of the lens 20 in the Z-axis direction remains unchanged, and the chip 30 is driven to move back and forth along the Z-axis by the focus driving unit 50, so as to change the distance between the chip 30 and the lens 20 to achieve the focusing of the camera module.

[0054] 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 along the plane where the bottom plate 422 is located, and there is no need to drive the focus drive unit 50 to move, wherein the plane where the bottom plate 422 is located is parallel to the plane where the X-Y axis is located. 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, and the energy consumption of the camera module can be effectively reduced.

[0055] The anti-shake driving unit 40 includes a stator module 42, a mover module 43, a sliding structure 70, an elastic reset assembly 47 and an anti-shake driving module. The stator module supports the mover module through the sliding structure and is in sliding connection with the mover module through the sliding structure.

[0056] Specifically, the stator module 42 is provided with a cavity 421 through which the upper and lower ends are connected. The lower end of the cavity 421 includes a bottom plate 422 extending along its radial direction. The mover module 43 is located in the cavity 421. The bottom plate 422 supports the mover module 43 through the sliding structure 70, and is slidably connected with the bottom wall of the mover module 43 through the sliding structure 70.

[0057] The anti-shake driving module connects the mover module 43 and the stator module 42 to drive the mover module 43 to slide along the bottom plate 422. The elastic reset component 47 connects the mover module 43 and the stator module 42 to force the mover module 43 to return to its original position after the mover module 43 moves.

[0058] The lens 20 is arranged on the moving submodule 43. When the anti-shake driving module drives the moving submodule 43 to move, the moving submodule 43 drives the lens 20 to move in the plane where the bottom plate 422 is located, so as to compensate for the displacement of the lens 20 and realize the anti-shake of the lens 20. Among them, the plane where the bottom plate 422 is located is parallel to the plane where the X-Y axis is located.

[0059] In this embodiment, the bottom plate 422 supports the mover module 43 through the sliding structure 70, and is in sliding connection with the mover module 43. The elastic reset component 47 only needs to provide deformation elastic force to force the mover module 43 to its original position, and does not need to bear the weight of the mover module 43, which can reduce the workload of the elastic reset component 47. Therefore, in the production process of the camera module, an elastic reset component 47 with a smaller elastic coefficient can be selected, so that the elastic reset component 47 can maintain sufficient deformation elastic force to force the mover module 43 to return to its original position, while also reducing the resistance encountered during the movement of the mover module 43, thereby effectively reducing the energy consumption of the anti-shake drive unit 40.

[0060] Next, the structure of the anti-shake and focus structure of this embodiment is further described.

[0061] Please continue reading Figure 2 and Figure 3 In this embodiment, the housing 10 includes an upper housing 11 and a lower housing 12, which are plugged into each other to form an inner cavity for installing the anti-shake drive unit 40 and the focus drive unit 50. The upper housing 11 is provided with a through hole for exposing the lens 20 to the outside of the housing 10.

[0062] The 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 also cubic, and the shapes of the stator module 42 and the top cover 41 are adapted to each other. The top cover 41 is disposed on the stator module 42.

[0063] The cavity 421 of the stator module 42 is in a cubic shape. In other embodiments, the cavity 421 of the stator module 42 can also be designed to be cylindrical, prism-shaped, etc.

[0064] 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, the elastic reset assembly 47, the sliding structure 70 and the anti-shake drive module. The sliding structure 70, the mover module 43, the anti-shake drive module and the spring reset 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 shape of the top cover 41 can be designed to be compatible with the shape of the stator module 42.

[0065] In this embodiment, the top wall of the top cover 41 abuts against the bottom wall inside 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.

[0066] In this embodiment, the shape of the mover module 43 is adapted to the shape of the cavity 421, and the mover module 43 is also in a cubic shape. In other embodiments, the mover module 43 can also be designed to be other adaptable columns, as long as its shape is adapted to the shape of the cavity 421 of the stator module 42. For example, the mover module 43 can be designed to be cylindrical, cubic, polygonal, or plate-shaped. The mover module 43 is provided with an assembly hole, and the lens 20 is mounted on the assembly hole.

[0067] In this embodiment, the anti-shake drive module includes a frame-shaped collar 442 sleeved around the mover module 43 and four anti-shake drive groups arranged between the stator module 42 and the collar 442, and the position of each anti-shake drive group corresponds to the position of the four side walls in the circumferential direction of the collar 442. The anti-shake drive group includes an anti-shake coil 443 fixedly connected to the side wall of the collar 442 and an anti-shake magnet 441 fixedly connected to the inner wall of the cavity 421 of the stator module 42.

[0068] 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 force or a repulsive force, thereby driving the collar 442 and the mover module 43 to move on the plane where the bottom plate 422 is located, and performing displacement compensation on the lens 20 carried by the mover module 43, so as to achieve anti-shake of the lens 20. Among them, the plane where the bottom plate 422 is located is parallel to the plane where the X-Y axis is located.

[0069] 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 number of anti-shake drive groups can be three or more, and their arrangement positions can also be adaptively changed, as long as the ring 442 and the mover module 43 can be driven to move in the plane where the X-Y axis is located, such as moving along the X axis or moving or rotating along the Y axis.

[0070] In this embodiment, the sliding structure 70 includes a groove group opened in the bottom plate 422 and a ball group installed in the groove group. The ball group is partially exposed in the groove group, and its exposed part abuts against the bottom wall of the mover module 43. The ball group can roll in the groove group, and the mover module 43 is slidably connected with the bottom plate 422 through the ball group. Such a sliding connection method can allow the mover module 43 to move linearly or rotate relative to the bottom plate 422, and has the advantages of simple and compact structure.

[0071] The groove group limits the position of the ball group in the plane where the bottom plate 422 is located, and the mover module 43 and the bottom plate 422 limit the ball group in the Z-axis direction. Under the common limitation of the mover module 43 and the groove group, the ball group is confined between the mover module 43 and the bottom plate 422 to prevent the ball group from being separated from the groove group.

[0072] In this embodiment, the groove set includes four grooves 71. The four grooves 71 are arranged in a rectangular shape. The ball set includes four balls 72, and each groove 71 is equipped with a ball 72.

[0073] In other embodiments, the number of grooves 71 can be three or more. For example, when the number of grooves 71 is three, the three grooves 71 are evenly arranged around the lower port of the cavity to form an equilateral triangle, so that the balls 72 of the grooves 71 can support the mover module more evenly, making the movement of the mover module more stable.

[0074] In this embodiment, the groove area of ​​the groove 71 is equal to the maximum cross-sectional area of ​​the ball 72. The ball 72 can roll in the groove 71. There is rolling friction between the mover module 43 and the ball 72, and the friction force is relatively small. This can significantly reduce the resistance encountered by the mover module 43 when moving, and reduce the energy consumption of the anti-shake process of the lens 20.

[0075] In other embodiments, the ball 72 may be fixed in the groove 71 , the ball 72 cannot roll, and there is sliding friction between the mover module 43 and the ball 72 , with relatively large friction force.

[0076] In other embodiments, the groove area of ​​the groove 71 is larger than the maximum cross-sectional area of ​​the ball 72, and the ball 72 can be rotatably installed in the groove 71. The position of the ball 72 can be changed when rolling, so that the friction between the base plate 422 and the ball 72 can be rolling friction, and the friction between the movable module 43 and the ball 72 can be rolling friction. In this way, the resistance encountered by the movable module 43 when moving can be significantly reduced, thereby reducing the energy consumption of the anti-shake process of the lens 20.

[0077] In other embodiments, a plurality of balls 72 may be disposed in each groove 71 , so that the contact area between the mover module 43 and the balls 72 can be increased, and the movement process of the mover module 43 can be more stable.

[0078] See also Figure 4 In this embodiment, the elastic reset assembly includes at least one elastic sheet 471, and the elastic sheet 471 includes a mover connection part 4712, a stator connection part 4711, and an elastic part 4713. The two ends of the elastic part 4713 are connected to the mover connection part 4712 and the stator connection part 4711 respectively.

[0079] The mover connection part 4712 is fixedly connected to the mover module; the stator connection part 4711 is fixedly connected to the stator module.

[0080] In this embodiment, the number of elastic sheets 471 is four. The shape of the movable module 43 is a cube, and has a circumferential side wall arranged around its own axial direction. The elastic parts 4713 of all elastic sheets 471 correspond to the four corner positions of the movable module 43 one by one. The elastic part 4713 is generally L-shaped and extends along the angular profile of the movable module 43, which can increase the extension length of the elastic part 4713 and enable the elastic part 4713 to undergo elastic deformation even when a small force is applied.

[0081] There is a gap between the elastic portion 4713 and the mover module 43 , and the gap provides sufficient activity space for the elastic portion 4713 during the elastic deformation process.

[0082] The orthographic projections formed by the elastic parts 4713 of adjacent elastic sheets 471 on the mover module 43 partially overlap. Further, the elastic part 4713 includes a first section 4713a connected to the stator connection part 4711 and a second section 4713b connected to the mover connection part 4712. The first section 4713a is connected to the second section 4713b, and the two are arranged in an L shape. The first section 4713a of any elastic sheet 471 is located between the second section 4713b of the adjacent elastic sheet 471 and the mover module 43, and the orthographic projection formed by the first section 4713a of any elastic sheet 471 on the mover module 43 partially overlaps with the orthographic projection formed by the second section 4713b of the adjacent elastic sheet 471 on the mover module 43, which can increase the compactness of the structure. In addition, such a structure can also allow the elastic parts 4713 to surround the mover module 43 together. Then, no matter in which direction the mover module 43 moves in the plane parallel to the X-Y axis, the elastic parts 4713 can provide sufficient deformation elastic force to the mover module 43 to force the mover module 43 to return to its original position.

[0083] In other embodiments, when the number of elastic sheets 471 is two, the two elastic sheets 471 are symmetrically arranged on opposite sides of the mover module 43, so as to more evenly provide the deformation elastic force forcing the mover module 43 to return to its original position. By analogy, in order to make the deformation elastic force provided by the elastic sheet 471 act evenly on the mover module 43, when the number of elastic sheets 471 is three or more, each elastic sheet 471 is evenly spaced around the mover module 43. For example, when there are three elastic sheets 471, they can be evenly arranged around the cylindrical mover module 43.

[0084] As a preferred option, see Fig.11When the number of elastic sheets 471 is two, the mover module 43 is cylindrical and has a circumferential side wall arranged around its own axial direction. The axial direction of the mover module 43 is parallel to the Z-axis direction. All elastic sheets 471 are located in a plane perpendicular to the axial direction of the mover module 43. The elastic portion 4713 is extended along the contour of the circumferential side wall of the mover module 43, and there is a gap between the elastic portion 4713 and the circumferential side wall. Such a structure can reserve a movable space between the elastic portion 4713 and the circumferential side wall for elastic deformation of the elastic portion 4713. Adjacent elastic portions 4713 partially overlap in the radial direction of the mover module 43, and the overlapping portions of the two are spaced apart in the radial direction of the mover module 43. Such a structure can reserve sufficient elastic deformation space between the two elastic portions 4713.

[0085] Of course, in other embodiments, when there are two or more elastic sheets 471, the elastic sheet 471 can be a common spring sheet (not shown in the figure) used to suspend the voice coil motor mover in the technical field, and the spring sheet bears the weight of the voice coil motor mover and enables the voice coil motor mover to be elastically reset after moving. In this solution, the weight of the mover module 43 is completely borne by the ball bearings, and the elastic sheet 471 no longer bears the weight of the mover module 43. The elastic sheet 471 only plays the role of forcing the mover module 43 to return to its original position after the mover module 43 is displaced. Therefore, the elastic sheet 471 of this solution has a lighter load.

[0086] In other embodiments, when the elastic reset assembly includes an elastic sheet 471, the elastic sheet 471 can be configured as a spring wire plate (not shown in the figure). The spring wire plate generally includes an inner ring portion, an outer ring portion arranged around the inner ring portion at intervals, and a spring wire group connecting the inner ring portion and the outer ring portion. Among them, the inner ring portion can be used as a mover connection portion 4712 connecting the top wall of the mover module 43, and the outer ring portion can be used as a stator connection portion 4711 connecting the stator module 42, and the spring wire group can be used as an elastic portion 4713. In the technical field of this invention, the spring wire plate is generally used in the sensor chip carrying the camera module, and this embodiment uses it to drive the mover module 43 to return to its original position after moving. The structure of the spring wire plate is a prior art, and the specific structure of the spring wire plate is not described and illustrated here.

[0087] See also Figure 5 , Figure 6 and Figure 7 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.

[0088] The housing 10 includes a vertical wall 64 extending in the Z-axis direction. The base plate 52 is limited to the vertical wall 64 for being fixedly connected to an external component. Specifically, the base plate 52 is clamped between the side walls of the upper housing 11 and the lower housing 12, and the base plate 52 is positioned by the side walls of the upper housing 11 and the lower housing 12. The vertical wall 64 of the housing 10 can be formed by one of the vertically arranged side walls of the lower housing 12.

[0089] 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.

[0090] Please combine Figure 2 , Figure 5 and Figure 6 One end of the elastic suspension plate 51 is connected to the base plate, and the other end of the elastic suspension plate 51 is suspended. The shape of the elastic suspension plate is a U-shape with an opening toward the vertical wall 64. The chip 30 is arranged at the free end of the elastic suspension plate 51, which is the end of the elastic suspension plate 51.

[0091] 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. Preferably, the focus drive module of this embodiment acts on the chip 30, so that the chip 30 moves along the Z axis.

[0092] See also Figure 8 and Fig. 9 , Figure 8 The structure state of the elastic suspension plate 51 when not in operation is shown. Fig. 9The structural state of the elastic suspension plate 51 when it 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.

[0093] See also Fig.10 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.

[0094] Please continue reading Figure 6 and Figure 7 The side wall of the chip 30 facing away from the vertical section 512 can be slidably connected with the vertical wall 64 of the housing 10 through a guide structure 60 to reciprocate along the Z axis. When the lower section 513 moves up or down along the Z axis, the side wall of the chip 30 facing away from the vertical section 512 can be slidably connected with 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 focusing accuracy of the lens 20.

[0095] 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 a vertical wall 64 of the housing 10. Specifically, the first strip groove 63 is provided on a vertical inner wall of the lower housing 12. The second strip groove 61 is provided on a side wall of the chip 30 that is opposite to 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 helps to reduce the overall volume of the focus drive unit 50.

[0096] Furthermore, a window 514 is provided in the upper section 511. The chip 30, the window 514 and the cavity 421 are located on the optical axis of the lens 20, and the light from the outside 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.

[0097] The chip 30 includes a chip body 32 and a chip support plate 31, wherein the chip body 32 is fixedly connected to the chip support plate 31, and the chip support plate 31 is fixedly connected to the lower half 513. The focus driving module connects the chip support plate 31 and the inner wall of the housing 10, and the chip support plate 31 is driven to move along the Z axis by the focus driving module, and the chip support plate 31 drives the elastic suspension plate 51 to undergo elastic deformation.

[0098] The focus driving module includes two focus driving groups 53 symmetrically arranged on opposite sides of the chip support plate 31, and the focus driving group 53 is located between the chip support plate 31 and the vertical inner wall of the lower shell 12. The focus driving 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 left-hand rule principle, 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, thereby driving the chip support plate 31 and the chip 30 to move along the Z axis by the focus coil 531, so as to complete the focus of the lens 20.

[0099] 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.

[0100] The anti-shake principle of the camera module of this embodiment includes:

[0101] 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.

[0102] The focusing principle of the camera module of this embodiment includes:

[0103] 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.

[0104] 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.

[0105] 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, which is 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 and focus structure comprises an anti-shake drive unit (40) and a focus drive unit (50) which are sequentially accommodated in the housing (10) from top to bottom; The chip (30) is arranged in the focus driving unit (50), and the chip (30) is suspended in the housing (10) through the focus driving unit (50), and the chip (30) is driven by the focus driving unit (50) to move along the Z axis; The anti-shake drive unit (40) comprises a stator module (42), a mover module (43), a sliding structure (70), an elastic reset component (47) and an anti-shake drive module; the stator module (42) supports the mover module (43) through the sliding structure (70) and is in sliding connection with the mover module (43) through the sliding structure (70); the anti-shake drive module connects the mover module (43) and the stator module (42) to drive the mover module (43) to slide relative to the stator module (42); the elastic reset component (47) The component (47) connects the mover module (43) and the stator module (42) to force the mover module (43) to return to its original position after the mover module (43) moves; the lens (20) is arranged on the mover module (43); the stator module (42) is provided with a cavity (421) through which the upper and lower ends are connected; the lower end of the cavity (421) includes a bottom plate (422) extending along its own radial direction; the mover module (43) is located in the cavity (421); and the sliding structure (70) is arranged on the bottom plate (422).

2. The anti-shake focusing structure according to claim 1, characterized in that: The sliding structure (70) comprises a groove group formed on the top wall of the bottom plate (422) and a ball group mounted on the groove group; the ball group is partially exposed outside the groove group, and the exposed part thereof abuts against the bottom wall of the mover module (43).

3. The anti-shake focusing structure according to claim 2, characterized in that: The groove group includes at least three grooves (71); the ball group includes at least three balls (72), and each groove (71) is equipped with at least one ball (72).

4. The anti-shake focusing structure according to claim 3, characterized in that: The notch area of ​​the groove (71) is greater than or equal to the maximum cross-sectional area of ​​the ball (72), and the ball (72) can be mounted in the groove (71) in a rolling manner or in a fixed position.

5. The anti-shake focusing structure according to claim 1, characterized in that: The elastic reset component (47) comprises at least one elastic sheet (471), the elastic sheet (471) comprising a mover connection portion (4712) connected to the mover module (43), a stator connection portion (4711) connected to the stator module (42), and an elastic portion (4713) connecting the mover connection portion (4712) and the stator connection portion (4711); the elastic portion (4713) is located between the stator module (42) and the mover module (43).

6. The anti-shake focusing structure according to claim 5, characterized in that: The movable submodule (43) is columnar and has a circumferential side wall arranged around its own axis; the number of the elastic sheets (471) is at least two, and all the elastic sheets (471) are located in a plane perpendicular to the axis of the movable submodule (43); the elastic parts (4713) are extended along the contour of the circumferential side wall and are spaced from the circumferential side wall; adjacent elastic parts (4713) overlap in the positive projection formed on the movable submodule.

7. The anti-shake focusing structure according to claim 1, characterized in that: The focus drive unit (50) comprises an elastic bracket and a focus drive module; the elastic bracket can be elastically deformably connected to the shell (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 shell (10) to drive the chip (30) to move along the Z-axis direction; the elastic bracket comprises a base plate (52) and an elastic suspension plate (51); the shell (10) comprises a vertical wall (64); the base plate (52) is limited to the vertical wall (64) to be 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; the shape of the elastic suspension plate (51) is U-shaped with its opening facing the vertical wall (64); the chip (30) is arranged at the free end of the elastic suspension plate (51).

8. The anti-shake focusing structure according to claim 7, 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.

9. The anti-shake focusing structure according to claim 8, characterized in that: The chip (30) can be slidably connected with the vertical wall (64) of the shell (10) along the Z axis through a guide structure (60); 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 be slidably abutted against the first strip groove (63) and the second strip groove (61) respectively.

10. 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 9; 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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