Image-stabilizer lens module

Abstract

The present invention relates to the technical field of optical image stabilizers. Disclosed is an image-stabilizer lens module, characterized in that the image-stabilizer lens module comprises: a lens moving motor module, comprising a first fixed portion and a first movable portion, which are connected to each other; and a chip moving motor module, the chip moving motor module and the lens moving motor module being arranged in a stacked manner, and the chip moving motor module comprising a second fixed portion, a second movable portion and a chip circuit board, wherein the chip circuit board comprises a third fixed portion and a third movable portion, the third fixed portion being connected to the second fixed portion, an image chip, which is arranged corresponding to a lens, being arranged on the third movable portion, the third movable portion being connected to the second movable portion, and the third fixed portion being connected to the third movable portion by means of a deformation arm. The present application ensures an image-stabilizer effect of a system, and the image-stabilizer lens module is directly connected to a housing, such that the space utilization rate of the system is improved, thereby achieving size control and simplification of the device, and thus facilitating assembly.

Description

Anti-shake lens module Technical Field

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

[0002] Existing optical image stabilization (OIS) motors can be primarily categorized into two types: lens-shift OIS and chip-shift OIS. The first type (referenced in patents: CN 207218504 U, CN 108508678 A, and CN 212258654 U) employs a conventional lens-shift OIS motor, whose movable components include the lens and the AutoFocus (AF) motor. The OIS motor achieves image stabilization by shifting the lens and AF motor. The OIS motor connects the movable and fixed components via ball bearings or suspension wires. The second type (referenced in patent: CN 214591666 U) employs chip-shift OIS motors, which achieve image stabilization by shifting the image chip. The second type of OIS camera module (consisting of a lens, OIS motor, and image chip) utilizes a flexible circuit board internally to connect the image chip and fixed component, outputting the image chip's signals to an external, fixed main control board.

[0003] Because the movable structure of the first type of OIS motor includes the lens translation OIS and AF motor structure, the movable structure and drive part are complex, which is not conducive to production and cost control. In addition, because the movable structure includes the AF motor and OIS magnet, the movable structure is of high quality, which is not conducive to high-frequency anti-shake performance and power consumption. Finally, because the magnet is in the movable structure, the magnet in the movable structure is easily attracted and interfered with by nearby magnets.

[0004] Because the flexible circuit board in a Type II OIS camera module requires multi-axis translation during image stabilization, the flexible circuit board requires specialized manufacturing processes and design to reduce the spring constant required for multi-axis translation. Conventional flexible circuit boards cannot meet these requirements, leading to increased costs for Type II OIS. Furthermore, the flexible portion of the flexible circuit board requires significant space, resulting in a larger Type II OIS camera module.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide an anti-shake lens module, in which the external magnetic force will not affect the first magnet group and the second magnet group, thereby ensuring its stability in the system and the anti-shake effect of the system. Its direct connection with the housing also improves the space utilization of the system, realizes the volume control and simplification of the device, and is easy to assemble.

[0007] In order to achieve the above object, the present invention provides an anti-shake lens module, comprising:

[0008] A lens moving motor module includes a first fixed portion and a first movable portion connected to each other, wherein the first fixed portion includes a first housing, a first magnet group, and a first base, the first magnet group being fixed to the first housing, the first movable portion includes a first coil group, a first circuit board, and a lens holder, a lens being fixed within the lens holder, the first circuit board being fixed to the lens holder, the first coil group being fixed to the first circuit board and disposed correspondingly to the first magnet group, and the first fixed portion and the first movable portion being connected via a first bridge portion;

[0009] A chip-moving motor module is stacked with the lens-moving motor module, and the chip-moving motor module includes a second fixed part, a second movable part and a chip circuit board. The second fixed part includes a second shell and a second magnet group. The second shell is fixedly connected to the first base. The second magnet group is fixed to the second shell. The second movable part includes a second coil group and a second coil seat. The second coil group is fixed to the second coil seat and is arranged corresponding to the second magnet group. The second fixed part and the second movable part are connected by a second bridging part. The chip circuit board includes a third fixed part and a third movable part. The third fixed part is connected to the second fixed part. The third movable part is provided with an image chip corresponding to the lens. The third movable part is connected to the second movable part, and the third fixed part and the third movable part are connected by a deformable arm.

[0010] Compared with the prior art, the anti-shake lens module of the embodiment of the present invention has the following advantages: the lens moving motor module realizes the anti-shake function by moving the lens, and includes a first fixed part and a first movable part, the first movable part includes a lens seat, a first circuit board fixed on the lens seat and a first coil group fixed on the first circuit board, the first fixed part includes a first shell, a first base and a first magnet group fixed on the first shell, the first coil group has magnetic force after being energized, and acts with the first magnet fixed on the first shell to push the lens fixed in the lens seat to move to realize optical anti-shake; the chip moving motor module stacked and fixed with the lens moving motor module realizes the anti-shake function by moving the image chip, and includes a second fixed part, a second movable part and a chip circuit board, the second fixed part includes a second shell and a second magnet fixed on the second shell. The second movable part includes a second coil seat and a second coil group fixed to the second coil seat, the chip circuit board includes a third movable part connected to the second movable part and a third fixed part connected to the second fixed part, and the third fixed part is provided with an image chip that receives optical information of the lens. After the second coil group is energized, a magnetic force is generated, which acts on the second magnet group and pushes the second coil seat to move. The third movable part connected to the second coil seat moves accordingly, driving the image chip to move to achieve optical image stabilization; the first magnet group and the second magnet group are both fixed to the immovable first and second shells. External magnetic forces will not affect the first magnet group and the second magnet group, thereby ensuring their stability in the system and the anti-shake effect of the system. Its direct connection with the shell also improves the space utilization of the system, realizes the volume control and simplification of the device, and is easy to assemble.

[0011] In the anti-shake lens module of the embodiment of the present invention, the first bridging portion includes a first spring group and a ball group, the first spring group connects the lens holder and the first base, and the ball group connects the lens holder and the first housing.

[0012] In the anti-shake lens module of an embodiment of the present invention, a magnetic conductive sheet is provided on the end surface of the first circuit board facing away from the first coil group. The magnetic conductive sheet is provided corresponding to the first coil group to fix the first coil group below the first magnet group and also press the ball group toward the first housing.

[0013] In the anti-shake lens module of an embodiment of the present invention, one end of the first spring group is connected to the first base, and the other end extends to the bottom of the first coil group and abuts the first circuit board, so as to fix the first coil group under the first magnet group and press the ball group toward the first housing.

[0014] In the anti-shake lens module of the embodiment of the present invention, the first magnet group includes at least two first magnets arranged perpendicular to each other, and the first coil group includes at least two first coils corresponding to the positions of the first magnets.

[0015] In the anti-shake lens module of the embodiment of the present invention, at least two first position sensors are further provided on the first circuit board, and the first position sensors are provided on the end surface of the first circuit board facing away from the first coil.

[0016] In the anti-shake lens module of an embodiment of the present invention, a first terminal is provided on the base, the first terminal is electrically connected to the chip circuit board through the chip-moving motor module, and the first circuit board is electrically connected to the first terminal through the first spring group.

[0017] In the anti-shake lens module of the embodiment of the present invention, the second movable part includes a second circuit board, the second circuit board is mounted on the second coil seat, and the third movable part is electrically connected to the second circuit board.

[0018] In the anti-shake lens module of an embodiment of the present invention, a second position sensor is provided on the second circuit board, and the second magnet group includes at least one driving magnet and one position magnet. The driving magnet is provided corresponding to the second coil group, and the position magnet is provided opposite to the second position sensor.

[0019] In the anti-shake lens module of the embodiment of the present invention, a central portion of the second coil seat is provided with an escape space to enable optical connection between the lens and the image chip, and the bottom of the lens can enter the escape space.

[0020] In the anti-shake lens module of an embodiment of the present invention, the deformable arm includes a first arm, a second arm and a third arm, the first arm is connected to the third movable part, the second arm is connected to the first arm and the third arm, the third arm is connected to the third fixed part, and the angle between the first arm and the third arm ranges from 75° to 105°.

[0021] In the anti-shake lens module of the embodiment of the present invention, the included angle range between the first arm and the second arm includes 35-55 degrees, and the included angle range between the second arm and the third arm includes 35-55 degrees.

[0022] In the anti-shake lens module of the embodiment of the present invention, the second arm is configured to be in an arc shape, and a radius R of the second arm is greater than 0.5 mm.

[0023] In the anti-shake lens module of the embodiment of the present invention, the chip circuit board can adopt a single-layer or multi-layer structure, and the deformable arm adopts a multi-layer plate stacking design, with gaps between adjacent plates.

[0024] In the anti-shake lens module of the embodiment of the present invention, the second bridging portion includes a second spring group, and the second spring group is fixedly connected to the second movable portion and the second fixed portion.

[0025] In the anti-shake lens module of the embodiment of the present invention, the second spring group includes at least two springs, and the installation distance between the at least two springs exceeds 50% of the height of the chip-moving motor module.

[0026] In the anti-shake lens module of an embodiment of the present invention, the second spring group includes a spring coil, on which at least four elastic wires are arranged in a surrounding manner. The width of the elastic wires is set to B and the thickness is set to u, where B / t satisfies 2:1 and the width of at least one elastic wire is different from the width of the elastic wire of another physical spring.

[0027] In the anti-shake lens module of an embodiment of the present invention, the second spring group includes at least four independent single springs, the width of the single spring is set to W, and the thickness is set to t, where W / t satisfies 2:1 and the thickness of at least one single spring differs from the thickness of the other single springs by 10%.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of the separation structure of an anti-shake lens module according to an embodiment of the present invention;

[0030] FIG2 is a schematic top view of the structure of an anti-shake lens module according to an embodiment of the present invention;

[0031] FIG3 is a schematic diagram of point AA in FIG2 ;

[0032] FIG4 is a schematic top view of a lens moving motor module of an anti-shake lens module according to an embodiment of the present invention;

[0033] FIG5 is a schematic diagram of point BB in FIG4 ;

[0034] FIG6 is a schematic diagram of CC in FIG4 ;

[0035] 7 is an exploded schematic diagram of a lens moving motor module of an anti-shake lens module according to an embodiment of the present invention;

[0036] FIG8 is a top view of the first magnet group of the lens moving motor module of the anti-shake lens module according to an embodiment of the present invention;

[0037] FIG9 is a schematic diagram of DD in FIG8 ;

[0038] FIG10 is a schematic top view of a chip-moving motor module of an anti-shake lens module according to an embodiment of the present invention;

[0039] FIG11 is a schematic diagram of point BB in FIG10;

[0040] FIG12 is a schematic diagram of the AA portion in FIG10;

[0041] FIG13 is an exploded schematic diagram of a chip-moving motor module of an anti-shake lens module according to an embodiment of the present invention;

[0042] FIG14 is a schematic structural diagram of a chip circuit board of an anti-shake lens module according to an embodiment of the present invention;

[0043] FIG15 is a schematic diagram of a spring coil of a chip-moving motor module of an anti-shake lens module according to an embodiment of the present invention;

[0044] FIG16 is a schematic diagram of a single spring of a chip-moving motor module of an anti-shake lens module according to an embodiment of the present invention;

[0045] FIG17 is a schematic top view of a lens moving motor module of an anti-shake lens module according to another embodiment of the present invention;

[0046] FIG18 is a schematic diagram of point BB in FIG17;

[0047] FIG19 is an exploded schematic diagram of a lens moving motor module of an anti-shake lens module according to another embodiment of the present invention;

[0048] FIG20 is an exploded schematic diagram of a chip-moving motor module of an anti-shake lens module according to another embodiment of the present invention;

[0049] FIG21 is a schematic diagram of a chip-moving motor module of an anti-shake lens module without a second housing according to another embodiment of the present invention;

[0050] In the figure, 1. lens moving motor module; 11. first housing; 12. first magnet group; 13. first base; 131. first terminal; 14. first coil group; 15. first circuit board; 151. magnetic conductive sheet; 152. first position sensor; 16. lens holder; 17. lens; 18. first spring group; 19. ball group; 2. chip moving motor module; 21. second housing; 22. second magnet group; 221. driving magnet; 222. position magnet; 23. second coil group; 24. second coil holder; 25. second base; 26. second circuit board; 27. second spring group; 271. spring coil; 272. elastic wire; 273. single spring; 3. chip circuit board; 31. third fixed part; 32. third movable part; 33. deformable arm; 331. first arm; 332. second arm; 333. third arm; 34. image chip. DETAILED DESCRIPTION

[0051] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0052] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0053] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0054] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0055] As shown in Figures 1-3, an anti-shake lens module of a preferred embodiment of an embodiment of the present invention includes a lens-moving motor module 1 and a chip-moving motor module 2, which are stacked up and down in the vertical direction. Light enters the chip-moving motor module 2 through the lens-moving motor module 1 and is received by the image chip 34. When affected by shaking, the lens-moving motor module 1 and the chip-moving motor module 2 work separately to achieve optical anti-shake.

[0056] The lens moving motor module 1 includes a first fixed portion and a first movable portion connected to each other, the first fixed portion includes a first housing 11, a first magnet group 12 and a first base 13, the first housing 11 is fixed to the body of the camera or imaging device, the first housing 11 and the first base 13 together form the internal space of the lens moving motor module 1, the first magnet group 12 is fixed to the first housing 11, the first movable portion includes a first coil group 14, a first circuit board 15 and a lens seat 16, a lens 17 is fixed in the lens seat 16, and the lens seat 16 has an internal opening. There is a through hole so that the light received by the lens 17 can pass through the lens holder 16. A mechanical avoidance gap designed to be at least 10% larger than the translation stroke X range of the lens holder 16 needs to be avoided between the lens holder 16 and the first shell; the first circuit board 15 is located on the side of the lens holder 16 facing the first magnet group 12 and is fixed to the lens holder 16; the first coil group 14 is fixed on the end surface of the first circuit board 15 facing the first magnet group 12 and is arranged corresponding to the first magnet group 12; the number of coils in the first coil group 14 is the same as the number of magnets in the first magnet group 12; the first fixed part and the first movable part are connected by a first bridge part, and the first bridge part has an elastic variable, which can prevent the first fixed part from moving when the first movable part moves; the first coil group 14 has a magnetic force after being energized, and acts on the first magnet fixed on the first shell 11 to push the lens 17 fixed in the lens holder 16 to move to achieve optical image stabilization.

[0057] The chip-movable motor module 2 is stacked with the lens 17 movable motor module 1, and the chip-movable motor module 2 includes a second fixed part, a second movable part and a chip circuit board 3. The second movable part is arranged in the second fixed part, and the chip circuit board 3 is arranged below the second fixed part. The second fixed part includes a second shell 21 and a second magnet group 22. The second shell 21 is fixedly connected to the first base 13. The second magnet group 22 is fixed to the second shell 21. The second movable part includes a second coil group 23 and a second coil seat 24. The second coil group 23 is fixed to the second coil seat 24 and is arranged corresponding to the second magnet group 22. The second fixed part and the second movable part are connected by a second bridging part. The chip circuit board 3 includes a third fixed part 31 and a third movable part 32. The chip-movable motor module 2 is also provided with a second base 25 at the bottom. The internal space formed by the second base 25 and the second housing 21 accommodates the second movable part and the main part of the chip circuit board 3. The third fixed part 31 in the chip circuit board 3 is connected to the second fixed part. The third movable part 32 is provided with an image chip 34 corresponding to the lens 17. The third movable part 32 is connected to the second movable part. The third fixed part 31 and the third movable part 32 are connected by a deformable arm 33. When the second coil group 23 is energized, it generates a magnetic force, which acts on the second magnet group 22 and pushes the second coil base 24 to move. The third movable part 32 connected to the second coil base 24 moves accordingly, driving the image chip 34 to move to achieve optical image stabilization. The deformable arm 33 prevents the third movable part 32 from driving the third fixed part 31 to move by its own deformation.

[0058] The translational directions of the first and second movable parts are nearly perpendicular to the optical axis (90°±3°). The first and second magnet groups 12, 22 are both fixed to the immovable first and second housings 11, 21. External magnetic forces will not affect the first and second magnet groups 12, 22, ensuring their stability within the system and the system's anti-shake effect. Their direct connection to the housing also improves system space utilization, achieving device volume control and simplification, facilitating assembly.

[0059] As shown in Figures 4-9, in some embodiments of the present invention, the first bridging portion includes a first spring assembly 18 and a ball assembly 19. The first spring assembly 18 connects the lens holder 16 and the first base 13, and the ball assembly 19 connects the lens holder 16 and the first housing 11. The spring can elastically deform when the lens holder 16 moves, ensuring the connection while also preventing the movement of the first housing 11 when the lens holder 16 moves. The ball assembly 19 is disposed between the first housing 11 and the lens holder 16 and includes one or more balls. The rotatable balls replace direct contact between the lens holder 16 and the first housing 11. This prevents direct friction between the lens holder 16 and the first housing 11 during translation, which could cause movement or damage to the first housing 11, thereby ensuring the reliability of the device.

[0060] In some embodiments of the present invention, the first circuit board 15 is made of a flexible material; a magnetic conductive sheet 151 is provided on the end surface of the first circuit board 15 on the side facing away from the first coil group 14. The magnetic conductive sheet 151 is provided corresponding to the first coil group 14 to fix the first coil group 14 under the first magnet group 12, and also press the ball group 19 toward the first shell 11. By increasing the pre-pressure suction force between the magnetic conductive sheet 151 and the magnet, pre-pressure is provided to press the balls tightly between the lens holder 16 and the first shell 11, and the position of the first coil group 14 is made as close as possible to the first magnet group 12, ensuring that the magnetic field force between the first magnet group 12 and the energized first coil portion is relatively stable. No additional pressure components are required, the stress of the elastic component is reduced, and the drop resistance of the first spring group 18 is improved.

[0061] As shown in Figures 17 and 18, in some embodiments of the present invention, one end of the first spring group 18 is connected to the first base 13, and the other end extends to the bottom of the first coil group 14 and abuts the first circuit board 15, so as to fix the first coil group 14 under the first magnet group 12, and also press the ball group 19 toward the first shell 11. The first spring group 18 adopts a pre-stressed design. The first spring group 18 provides a pre-stress to the first movable part through deformation to press the ball tightly between the lens holder 16 and the first shell 11, thereby overcoming the gravity after the first movable part is assembled with the lens 17; when carrying a lighter lens 17, it can better save costs and there is no need to add a magnetic conductive sheet 151.

[0062] In some embodiments of the present invention, the first spring group 18 includes at least two leaf springs, and the first ball group 19 includes at least three balls.

[0063] In some embodiments of the present invention, the first magnet group 12 includes at least two first magnets arranged perpendicular to each other, and the first coil group 14 includes at least two first coils corresponding to the positions of the first magnets. Preferably, the first magnet group 12 includes four first magnets arranged in a surrounding manner, and adjacent first magnets are perpendicular to each other, and four first coils may also be arranged accordingly. The arrangement of multiple first magnets and multiple first coils enables the first circuit board 15 to have the ability to move in multiple directions and rotate around itself, so that the optical image stabilization effect is more outstanding. Specifically, the first coil is placed symmetrically with respect to the N pole and S pole of the first magnet, changing the direction of the coil current to achieve consistent thrust direction of the coil.

[0064] In some embodiments of the present invention, the first coil assembly 14 can be connected to the first circuit board 15 by welding a winding wire (enameled wire) material, or the first circuit board 15 can be connected by patching.

[0065] In some embodiments of the present invention, the first circuit board 15 is further provided with at least two first position sensors 152. These first position sensors 152 are connected to a controller. When jitter occurs, the controller calculates the displacement required for anti-shake based on the information transmitted by the first position sensors 152 and transmits this displacement information to the first circuit board 15. The first circuit board 15 then energizes the first coil assembly 14 to generate magnetic force, which in turn causes the lens to move in the opposite direction of the previous jitter, achieving anti-shake. The first position sensor 152 is disposed on the end surface of the first circuit board 15 facing away from the first coil. Multiple first position sensors 152 may also be provided. The combined action of multiple first position sensors 152 can provide more accurate jitter or displacement information. Specifically, the first circuit board 15 includes at least one first position sensor 152 and at least one first coil, interlaced within the flexible circuit board. If a single first coil can accommodate translation along a single axis, a single coil can be used, effectively saving material costs and improving production efficiency.

[0066] In some embodiments of the present invention, a first terminal 131 is provided on the first base 13. This first terminal 131 is electrically connected to the chip circuit board 3 via the chip-mobile motor module 2. The first circuit board 15 is electrically connected to the first terminal 131 via the first spring assembly 18. Information from the first position sensor 152 is output via the first terminal 131, and displacement control information required by the circuit board is also input via the first terminal 131. Multiple first terminals 131 may be provided, each located at the four corners of the first base 13, improving the reliability of the electrical connection within the device. During installation, one end of the spring in the first spring assembly 18 is electrically connected to the first circuit board 15, and the other end is electrically connected to the first terminal 131.

[0067] As shown in Figures 10-13, in some embodiments of the present invention, the second movable part includes a second circuit board 26, which is mounted on the second coil seat 24. The third movable part 32 is electrically connected to the second circuit board 26. The second circuit board 26 is connected to the controller through the third movable part 32. After shaking occurs, the displacement information sent by the controller is transmitted to the second circuit board 26, and the second circuit board 26 energizes the second coil group 23, so that a thrust is formed between it and the second magnet group 22 and drives the image chip 34 on the third movable part 32 to move in the opposite direction of the shaking, thereby realizing optical image stabilization.

[0068] In some embodiments of the present invention, the second circuit board 26 is made of flexible circuit board material and mechanically fixed to the second coil base 24. The second coil assembly 23 is connected to the second circuit board 26. A second position sensor is provided on the second circuit board 26, and the second position sensor is connected to a controller. When vibration occurs, the controller can perform calculations based on the information transmitted by the second position sensor. The second magnet assembly 22 includes at least one driving magnet 221 and a positioning magnet 222. The driving magnets 221 can be two or four. The driving magnets 221 are arranged corresponding to the second coil assembly 23 and are used to generate electromagnetic induction thrust with the second coil assembly 23. The coils in the second coil assembly 23 can also be arranged in two or four corresponding positions, respectively corresponding to the anti-shake requirements of different working conditions. The positioning magnet 222 is arranged opposite the second position sensor to cooperate with the second position sensor's induced magnetic field. Specifically, the second coil is symmetrically placed relative to the north and south poles of the second magnet, changing the direction of the coil current and achieving consistent direction of the coil thrust.

[0069] In some embodiments of the present invention, the second magnet group 22 is fixed in the second housing 21 via a magnet bracket 28 , and the magnet bracket 28 fixes the second magnet group between the second base 25 and the second housing 21 .

[0070] In some embodiments of the present invention, a relief space is provided in the central portion of the second coil seat 24 to enable an optical connection between the lens 17 and the image chip 34. The relief space is communicated with a through hole at the bottom of the lens seat 16, and the bottom of the lens 17 can enter the relief space. A certain gap is also provided between the inner side wall of the second coil seat 24 and the lens 17. The purpose is that when the lens movable module is working, the lens 17 performs lens translation movement, and the gap can avoid mechanical interference between the lens and the second lens seat 16, which would result in failure to achieve anti-shake and poor focusing effect.

[0071] As shown in Figure 14, in some embodiments of the present invention, the deformable arm 33 includes a first arm 331, a second arm 332, and a third arm 333. The first arm 331 connects to the third movable portion 32, the second arm 332 connects the first arm 331 and the third arm 333, and the third arm 333 connects to the third fixed portion 31. The angle between the first arm 331 and the third arm 333 ranges from 75° to 105°. The deformable arm 33 is entirely made of a flexible material and can deform when the third movable portion 32 moves to prevent the third fixed portion 31 from moving accordingly. Two deformable arms 33 may be provided, and the connection point between the two first arms 331 is connected to the second circuit board 26. Through a welding process, the second circuit board 26 and the chip circuit board 3 are connected and conductive, and signal transmission is carried out through the chip circuit board 3 to carry out control signals.

[0072] In some embodiments of the present invention, the angle range between the first arm 331 and the second arm 332 includes 35-55 degrees, and the angle range between the second arm 332 and the third arm 333 includes 35-55 degrees. The similar angle ranges on both sides allow the second arm 332 to alleviate the displacement transmitted from the first arm 331 in two directions, preventing excessive force on one end of the second arm 332 due to excessive angle difference, thereby preventing damage.

[0073] In some embodiments of the present invention, the second arm 332 may also be configured to be in an arc shape, with a radius R of the second arm 332 greater than 0.5 mm, and two ends of the arc respectively connected to the first arm 331 and the third arm 333 .

[0074] In some embodiments of the present invention, the chip circuit board 3 may adopt a single-layer or multi-layer structure. The morphological design of the chip circuit board 3 adopts a single-layer (stacked number = 1 layer) or a multi-layer design (stacked number ≥ 2 layers). During the autofocus movement, the deformable arm 33 may deform, and when the deformable arm 33 adopts a multi-layer plate stacking design, there is a gap between adjacent plates. The gap between adjacent plates can improve the torsion resistance of the deformable arm. The advantage of its layered design is that it reduces the K value coefficient of the material. For the same structural design, the elastic constant of the single-layer design will be higher than the elastic constant of the layered design, which will increase power consumption; the deformable arm 33 can be composed of vertically arranged multi-layer plates or horizontally arranged multi-layer plates. If the material elastic constant is small, the magnetic thrust generated by the coil can be satisfied, and the deformable arm 33 can adopt a non-layered (i.e., stacked without gaps) design to reduce material and process costs.

[0075] In some embodiments of the present invention, the second bridging portion includes a second spring group 27, which fixedly connects the second movable portion and the second fixed portion. The second spring group 27 includes a separate spring group connecting the second coil seat 24 and the second housing 21 and an independent spring group connecting the coil seat and the chip circuit board 3.

[0076] In some embodiments of the present invention, the second spring group 27 includes at least two springs distributed in the vertical direction of the chip-mobile motor module 2, and the installation distance between at least two of the springs exceeds 50% of the height of the chip-mobile motor module. The springs are respectively located at the top and bottom of the chip-mobile motor module 2. The farther the two springs are apart, the better the optical anti-shake adjustment effect on the chip circuit board 3.

[0077] As shown in FIG15 , in some embodiments of the present invention, the independent spring assembly of the second spring assembly 27 includes a spring coil 271, which is provided with at least four circumferentially arranged elastic wires 272. The elastic wires 272 have a width B and a thickness u, where B / t satisfies a 2:1 ratio, and the width of at least one elastic wire 272 differs from the width of another solid spring wire 272. The shape of the elastic wires 272 can be rotationally asymmetrical, requiring orientation during installation. By adjusting the width of at least one solid spring wire 272, the elastic force applied thereto and the suspension force applied thereto are inconsistent, facilitating design adjustments. This can address uneven force on the second movable portion, which can cause tilt during movement. By compensating for this uneven width of at least one elastic wire 272, the movable portion can achieve force balance, enabling smooth movement during autofocus. Alternatively, if a rotationally symmetrical design for the elastic wires 272 is unfeasible due to structural space limitations, an asymmetric design can be employed to better utilize the internal structural space.

[0078] As shown in FIG16 , in some embodiments of the present invention, the second spring assembly 27 includes at least four independent single springs 273 , each having a width W and a thickness t, where W / t satisfies a 2:1 ratio and the thickness of at least one single spring 273 differs by 10% from the thickness of the other single springs 273. This advantageously allows for inconsistent elastic force and suspension forces applied by at least one single spring 273 by adjusting its thickness, thereby facilitating design adjustments and addressing the uneven force applied to the second movable portion, which can cause tilting during movement. By compensating for this uneven thickness of at least one single spring 273, the movable structure achieves balanced force, enabling smooth movement during autofocus.

[0079] As shown in Figures 19-21, as a preferred embodiment of the present application, the lens moving motor module 1 realizes the anti-shake function by moving the lens 17, which includes a first fixed part and a first movable part. The first movable part includes a lens seat 16, a first circuit board 15 fixed on the lens seat 16, and a first fixed part. and a first coil group 14 fixed on the first circuit board 15, the first coil group 14 having four coils arranged in a circle and perpendicular to each other; the first fixing part includes a first shell 11, a first base 13 and a first magnet group 12 fixed on the first shell 11, the first magnet group 12 having four first magnets with coils arranged in a circle and perpendicular to each other, and three balls are arranged between the first shell 11 and the lens holder 16; the first coil group 14 and the balls are pressed toward the first magnet group 12 by the first spring group 18; the first coil group 14 has magnetic force after being energized, and acts with the first magnet fixed on the first shell 11 to push the lens 17 fixed in the lens holder 16 to move to realize optical image stabilization; the chip mobile motor module 2 stacked and fixed with the lens 17 mobile motor module 1 realizes the image stabilization function by moving the image chip 34, It includes a second fixed part, a second movable part and a chip circuit board 3. The second fixed part includes a second shell 21 and a second magnet group 22 fixed to the second shell 21. The second magnet group 22 has four driving magnets 221 and one position magnet 222. The second movable part includes a second coil seat 24 and a second coil group 23 fixed to the second coil seat 24. The chip circuit board 3 includes a third movable part 32 connected to the second movable part and a third fixed part 31 connected to the second fixed part. An image chip 34 for receiving optical information from the lens 17 is provided on the third fixed part 31. After the second coil group 23 is energized, it generates magnetic force, which acts on the second magnet group 22 and pushes the second coil seat 24 to move. The third movable part 32 connected to the second coil seat 24 moves accordingly, driving the image chip 34 to move to achieve optical image stabilization.

[0080] In summary, an embodiment of the present invention provides an anti-shake lens module, in which the first magnet group 12 and the second magnet group 22 are both fixed to the immovable first shell 11 and the second shell 21. The external magnetic force will not affect the first magnet group 12 and the second magnet group 22, thereby ensuring their stability in the system and the anti-shake effect of the system. Its direct connection with the shell also improves the space utilization of the system, realizes the volume control and simplification of the device, and facilitates assembly.

[0081] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-shake lens module, characterized in that: include: A lens moving motor module, comprising a first fixed part and a first movable part connected to each other, wherein the first fixed part comprises a first housing, a first magnet group and a first base, the first magnet group is fixed to the first housing, the first movable part comprises a first coil group, a first circuit board and a lens seat, a lens is fixed in the lens seat, the first circuit board is fixed to the lens seat, the first coil group is fixed to the first circuit board and is arranged corresponding to the first magnet group, and the first fixed part and the first movable part are connected by a first bridge part; A chip movable motor module is stacked with the lens movable motor module, the chip movable motor module includes a second fixed part, a second movable part and a chip circuit board, the second fixed part includes a second shell and a second magnet group, the second shell is fixedly connected to the first base, the second magnet group is fixed to the second shell, the second movable part includes a second coil group and a second coil seat, the second coil group is fixed to the second coil seat and is arranged corresponding to the second magnet group, the second fixed part and the second movable part are connected by a second bridging part, the chip circuit board includes a third fixed part and a third movable part, the third fixed part is connected to the second fixed part, the third movable part is provided with an image chip arranged corresponding to the lens, the third movable part is connected to the second movable part, and the third fixed part and the third movable part are connected by a deformable arm.

2. The anti-shake lens module according to claim 1, characterized in that: The first bridging portion includes a first spring group and a ball group, the first spring group connects the lens seat and the first base, and the ball group connects the lens seat and the first housing.

3. The anti-shake lens module according to claim 2, characterized in that: A magnetic conductive sheet is disposed on an end surface of the first circuit board facing away from the first coil group. The magnetic conductive sheet is disposed corresponding to the first coil group to fix the first coil group below the first magnet group and press the ball group toward the first housing.

4. The anti-shake lens module according to claim 2, characterized in that: One end of the first spring group is connected to the first base, and the other end extends to the bottom of the first coil group and abuts against the first circuit board to fix the first coil group under the first magnet group and press the ball group toward the first housing.

5. The anti-shake lens module according to claim 1, characterized in that: The first magnet group includes at least two first magnets that are vertically arranged to each other, and the first coil group includes at least two first coils corresponding to the positions of the first magnets.

6. The anti-shake lens module according to claim 5, characterized in that: At least two first position sensors are also arranged on the first circuit board. The first position sensors are arranged on the end surface of the first circuit board facing away from the first coil.

7. The anti-shake lens module according to claim 2, characterized in that: A first terminal is disposed on the base, the first terminal is electrically connected to the chip circuit board through the chip mobile motor module, and the first circuit board is electrically connected to the first terminal through the first spring group.

8. The anti-shake lens module according to claim 1, characterized in that: The second movable part includes a second circuit board, the second circuit board is mounted on the second coil seat, and the third movable part is electrically connected to the second circuit board.

9. The anti-shake lens module according to claim 8, characterized in that: A second position sensor is disposed on the second circuit board. The second magnet group includes at least one driving magnet and one position magnet. The driving magnet is disposed corresponding to the second coil group. The position magnet is disposed opposite to the second position sensor.

10. The anti-shake lens module according to claim 1, characterized in that: A avoidance space is provided at the central portion of the second coil seat to enable the optical path between the lens and the image chip to be connected, and the bottom of the lens can enter the avoidance space.

11. The anti-shake lens module according to claim 1, characterized in that: The deformable arm includes a first arm, a second arm and a third arm, the first arm is connected to the third movable part, the second arm is connected to the first arm and the third arm, the third arm is connected to the third fixed part, and the angle between the first arm and the third arm ranges from 75° to 105°.

12. The anti-shake lens module according to claim 11, characterized in that: The included angle range between the first arm and the second arm includes 35-55 degrees, and the included angle range between the second arm and the third arm includes 35-55 degrees.

13. The anti-shake lens module according to claim 11, characterized in that: The second arm is configured to be in an arc shape, and a radius R of the second arm is greater than 0.5 mm.

14. The anti-shake lens module according to claim 1, characterized in that: The chip circuit board may adopt a single-layer or multi-layer structure, and the deformable arm adopts a multi-layer board stacking design, with gaps between adjacent boards.

15. The anti-shake lens module according to claim 1, characterized in that: The second bridging portion includes a second spring group, and the second spring group fixedly connects the second movable portion and the second fixed portion.

16. The anti-shake lens module according to claim 15, characterized in that: The second spring group includes at least two springs, and an installation distance between at least two of the springs exceeds 50% of a height of the chip-moving motor module.

17. The anti-shake lens module according to claim 15, characterized in that: The second spring group includes a spring coil, on which at least four elastic wires are arranged in a surrounding manner. The width of the elastic wire is set to B and the thickness is set to u, wherein B / t satisfies 2:1 and the width of at least one elastic wire is different from the width of the elastic wire of another solid spring.

18. The anti-shake lens module according to claim 15, characterized in that: The second spring group includes at least four independent single springs, the width of the single spring is set to W, and the thickness is set to t, wherein W / t satisfies 2:1 and the thickness of at least one single spring differs from that of other single springs by 10%.

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