Image stabilization lens module

Abstract

This invention relates to the field of optical image stabilization technology and discloses an image stabilization lens module. The module comprises: a lens-moving motor module, which includes a first fixed part and a first movable part connected to each other; and a chip-moving motor module stacked with the lens-moving motor module. The chip-moving motor module includes a second fixed part, a second movable part, and a chip circuit board. 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 has an image chip corresponding to the lens disposed on it. The third movable part is connected to the second movable part. The third fixed part and the third movable part are connected via a deformable arm. This application ensures the image stabilization effect of the system. Its direct connection to the housing also improves the space utilization of the system, achieving size control and simplification of the device, and facilitating assembly.

Description

Technical Field

[0001] This invention relates to the field of camera lens technology, and in particular to an image stabilization lens module. Background Technology

[0002] Existing optical image stabilization (OIS) motors can be mainly divided into two categories: lens-shift OIS and chip-shift OIS, respectively. The first type (referencing patents: CN 207218504 U, CN108508678 A, CN 212258654 U) describes a traditional lens-shift OIS motor whose movable part includes the lens and an AutoFocus (AF) motor. The OIS motor achieves image stabilization by shifting the lens and the AF motor. The OIS motor connects the movable and stationary structures via ball bearings or suspension wires. The second type (referencing patent: CN214591666 U) describes a chip-shift OIS motor that achieves image stabilization by shifting the image chip. The second type of OIS camera module (including the lens, OIS motor, and image chip) uses a flexible circuit board structure to connect the image chip and the stationary structure, outputting the image chip's signals to an externally fixed main control board.

[0003] Because the movable structure of the first type of OIS motor includes lens translation OIS and AF motor structures, the movable structure and drive part are complex, which is not conducive to production and cost control. In addition, because the movable structure includes AF motor and OIS magnet, the movable structure has a high quality, which is not conducive to high-frequency image stabilization 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 the Type II OIS camera module needs to perform multi-axis translational movements during image stabilization, it requires special manufacturing processes and designs to reduce the spring constant of multi-axis translation. Since traditional flexible circuit boards cannot meet these requirements, the cost of Type II OIS increases. Furthermore, the elastic portion of the flexible circuit board requires a significant amount of space, resulting in a larger size for the Type II OIS camera module. Summary of the Invention

[0005] The purpose of this invention is to provide a stabilized lens module in which external magnetic force will not affect the first and second magnet groups, thus ensuring their stability in the system and guaranteeing the system's image stabilization effect. Its direct connection with the housing also improves the system's space utilization, achieving size control and simplification of the device, and facilitating assembly.

[0006] To achieve the above objectives, the present invention provides an image stabilization lens module, comprising:

[0007] A lens-moving motor module includes a first fixed part and a first movable part connected to each other. The first fixed part includes 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 includes a first coil group, a first circuit board, and a lens holder. A lens is fixed inside the lens holder. The first circuit board is fixed to the lens holder. The first coil group is fixed on the first circuit board and is correspondingly arranged with the first magnet group. The first fixed part and the first movable part are connected by a first bridging part.

[0008] A chip-moving motor module is stacked with the lens-moving motor module. 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 housing and a second magnet assembly. The second housing is fixedly connected to the first base, and the second magnet assembly is fixed to the second housing. The second movable part includes a second coil assembly and a second coil seat. The second coil assembly is fixed to the second coil seat and is correspondingly arranged with the second magnet assembly. The second fixed part and the second movable part are connected through 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. An image chip corresponding to the lens is disposed on the third movable part. The third movable part is connected to the second movable part. The third fixed part and the third movable part are connected through a deformable arm.

[0009] Compared with existing technologies, the image stabilization lens module of this invention has the following advantages: The lens-moving motor module achieves image stabilization by moving the lens. It includes a first fixed part and a first movable part. The first movable part includes a lens mount, a first circuit board fixed to the lens mount, and a first coil assembly fixed to the first circuit board. The first fixed part includes a first housing, a first base, and a first magnet assembly fixed to the first housing. The first coil assembly has magnetic force after being energized, and interacts with the first magnet fixed to the first housing to push the lens fixed in the lens mount to move, thus achieving optical image stabilization. The chip-moving motor module, stacked and fixed with the lens-moving motor module, achieves image stabilization by moving the image chip. It includes a second fixed part, a second movable part, and a chip circuit board. The second fixed part includes a second housing and a second magnet fixed to the second housing. The assembly includes a second movable part comprising a second coil base and a second coil assembly fixed to the second coil base. The chip circuit board comprises a third movable part connected to the second movable part and a third fixed part connected to the second fixed part. An image chip for receiving optical information from the lens is disposed on the third fixed part. When the second coil assembly is energized, it generates magnetic force, interacts with the second magnet assembly, and pushes the second coil base to move. The third movable part connected to the second coil base moves accordingly, driving the image chip to move to achieve optical image stabilization. The first magnet assembly and the second magnet assembly are both fixed to the immovable first and second housings. External magnetic forces will not affect the first and second magnet assemblies, ensuring their stability in the system and guaranteeing the image stabilization effect of the system. Their direct connection to the housing also improves the space utilization of the system, realizes the control and simplification of the device's volume, and facilitates assembly.

[0010] In the image stabilization lens module of this invention, the first bridging part includes a first spring group and a ball group. The first spring group connects the lens mount and the first base, and the ball group connects the lens mount and the first housing.

[0011] In the image stabilization lens module of this invention, a magnetic sheet is provided on the side face of the first circuit board facing away from the first coil group. The magnetic sheet is arranged corresponding to the first coil group to fix the first coil group below the first magnet group and also to press the ball group against the first housing.

[0012] In the image stabilization lens module of this embodiment, 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, so as to fix the first coil group to the bottom of the first magnet group and press the ball group against the first housing.

[0013] The image stabilization lens module of this invention includes a first magnet group comprising at least two first magnets arranged perpendicularly to each other, and a first coil group comprising at least two first coils corresponding to the positions of the first magnets.

[0014] In the image stabilization lens module of this embodiment, at least two first position sensors are further provided on the first circuit board, and the first position sensors are disposed on the end face of the first circuit board facing away from the first coil.

[0015] In the image stabilization lens module of this 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. The first circuit board is electrically connected to the first terminal through the first spring group.

[0016] In the image stabilization lens module of this embodiment, the second movable part includes a second circuit board, the second circuit board is mounted on the second coil base, and the third movable part is electrically connected to the second circuit board.

[0017] In the image stabilization lens module of this invention, a second position sensor is provided on the second circuit board, and the second magnet group includes at least one driving magnet and a position magnet. The driving magnet is arranged corresponding to the second coil group, and the position magnet is arranged opposite to the second position sensor.

[0018] In the image stabilization lens module of this invention, the center portion of the second coil mount is provided with a clearance space to allow optical path connection between the lens and the image chip, and the bottom of the lens can enter the clearance space.

[0019] The image stabilization lens module of this invention includes a deformable arm comprising 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, and the third arm is connected to the third fixed part. The included angle between the first arm and the third arm ranges from 75° to 105°.

[0020] In the image stabilization lens module of this invention, the included angle range of the first arm and the second arm is 35-55°, and the included angle range of the second arm and the third arm is 35-55°.

[0021] In the image stabilization lens module of this embodiment, the second arm is configured as an arc shape, and the radius R of the second arm is greater than 0.5 mm.

[0022] In the image stabilization lens module of this invention, 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.

[0023] In the image stabilization lens module of this invention, the second bridging part includes a second spring assembly, which is fixedly connected to the second movable part and the second fixed part.

[0024] In the image stabilization lens module of this embodiment, 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.

[0025] In the image stabilization lens module of this invention, the second spring group includes a spring coil with at least four spring wires arranged around it. The width of the spring wire is set to B and the thickness is set to u, where B / t satisfies 2:1 and at least one spring wire has a width different from the width of another physical spring wire.

[0026] In the image stabilization lens module of this embodiment, the second spring group includes at least four independent individual springs. The width of each individual 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 individual spring differs from the thickness of the other individual springs by 10%.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the separation structure of the image stabilization lens module according to an embodiment of the present invention;

[0029] Figure 2 This is a top view of the image stabilization lens module according to an embodiment of the present invention;

[0030] Figure 3 yes Figure 2 A schematic diagram at point AA;

[0031] Figure 4 This is a top view schematic diagram of the lens movement motor module of the image stabilization lens module according to an embodiment of the present invention;

[0032] Figure 5 yes Figure 4 Schematic diagram at point BB;

[0033] Figure 6 yes Figure 4 A schematic diagram at point CC;

[0034] Figure 7 This is an exploded view of the lens-moving motor module of the image-stabilized lens module according to an embodiment of the present invention.

[0035] Figure 8This is a top view of the first magnet group of the lens-moving motor module of the image-stabilized lens module according to an embodiment of the present invention;

[0036] Figure 9 yes Figure 8 Schematic diagram at point DD;

[0037] Figure 10 This is a top view schematic diagram of the chip-moving motor module of the image stabilization lens module according to an embodiment of the present invention;

[0038] Figure 11 yes Figure 10 Schematic diagram at point BB;

[0039] Figure 12 yes Figure 10 A schematic diagram at point AA;

[0040] Figure 13 This is an exploded view of the chip-moving motor module of the image stabilization lens module according to an embodiment of the present invention.

[0041] Figure 14 This is a schematic diagram of the chip circuit board of the image stabilization lens module according to an embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of the spring coil of the chip-moving motor module of the image stabilization lens module according to an embodiment of the present invention;

[0043] Figure 16 This is a schematic diagram of a single spring in the chip-moving motor module of the image stabilization lens module according to an embodiment of the present invention.

[0044] Figure 17 This is a top view schematic diagram of the lens moving motor module of the image stabilization lens module according to another embodiment of the present invention;

[0045] Figure 18 yes Figure 17 Schematic diagram at point BB;

[0046] Figure 19 This is an exploded view of the lens-moving motor module of the image-stabilized lens module according to another embodiment of the present invention.

[0047] Figure 20 This is an exploded view of the chip-moving motor module of the image stabilization lens module according to another embodiment of the present invention.

[0048] Figure 21 This is a schematic diagram of the chip-moving motor module of the image stabilization lens module of another embodiment of the present invention with the second housing removed.

[0049] In the diagram, 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. Drive 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. Spring wire; 273. Single spring; 3. Chip circuit board; 31. Third fixing part; 32. Third movable part; 33. Deformable arm; 331. First arm; 332. Second arm; 333. Third arm; 34. Image chip. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0051] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0052] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0053] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0054] like Figure 1-3As shown, a preferred embodiment of the present invention provides a lens stabilization lens module, including a lens-moving motor module 1 and a chip-moving motor module 2, which are stacked vertically. Light passes through the lens-moving motor module 1 and enters the chip-moving motor module 2, where it 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 respectively to achieve optical image stabilization.

[0055] The lens-moving motor module 1 includes a first fixed part and a first movable part connected to each other. The first fixed part includes a first housing 11, a first magnet assembly 12, and a first base 13. The first housing 11 is fixed to the body of a camera or video recording 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 assembly 12 is fixed to the first housing 11. The first movable part includes a first coil assembly 14, a first circuit board 15, and a lens mount 16. A lens 17 is fixed inside the lens mount 16. A through hole is provided inside the lens mount 16 to allow light received by the lens 17 to pass through the lens mount 16. The distance between the lens mount 16 and the first housing needs to be designed to be at least 10 mm larger than the translational range X of the lens mount 16. A mechanical clearance of %; 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 face of the first circuit board 15 facing the first magnet group 12 and is correspondingly arranged with 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 bridging part; the first bridging part has elastic deformation to prevent the first fixed part from moving when the first movable part moves; the first coil group 14 has magnetic force after being energized, and interacts with the first magnet fixed on the first housing 11 to push the lens 17 fixed in the lens holder 16 to move and achieve optical image stabilization.

[0056] The chip-moving motor module 2 is stacked with the lens 17-moving motor module 1. The chip-moving motor module 2 includes a second fixed part, a second movable part, and a chip circuit board 3. The second movable part is disposed within the second fixed part, and the chip circuit board 3 is disposed below the second fixed part. The second fixed part includes a second housing 21 and a second magnet assembly 22. The second housing 21 is fixedly connected to the first base 13, and the second magnet assembly 22 is fixed to the second housing 21. The second movable part includes a second coil assembly 23 and a second coil base 24. The second coil assembly 23 is fixed to the second coil base 24 and correspondingly disposed with respect to the second magnet assembly 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 bottom of 2 is also provided with a second base 25. The internal space formed by the second base 25 and the second outer shell 21 accommodates the second movable part and the main body 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. After the second coil group 23 is energized, it generates magnetic force, which interacts with 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. The deformable arm 33 prevents the third movable part 32 from driving the third fixed part 31 to move by its own deformation.

[0057] The translational direction of the first movable part and the second movable part is nearly perpendicular to the optical axis (90°±3°). The first magnet group 12 and the second magnet group 22 are both fixed to the immovable first outer shell 11 and the second outer shell 21. External magnetic forces will not affect the first magnet group 12 and the second magnet group 22, ensuring their stability in the system and the anti-shake effect of the system. Their direct connection with the outer shell also improves the space utilization of the system, realizes the volume control and simplification of the device, and facilitates assembly.

[0058] like Figure 4-9As shown, 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 mount 16 and the first base 13, and the ball assembly 19 connects the lens mount 16 and the first housing 11. The springs can elastically deform when the lens mount 16 moves, ensuring the connection while preventing the lens mount 16 from moving the first housing 11. The ball assembly 19, which includes one or more balls, is provided between the first housing 11 and the lens mount 16. By using rotatable balls to replace the direct contact between the lens mount 16 and the first housing 11, the lens mount 16 can be prevented from directly rubbing against the first housing 11 during translation, thus avoiding movement or damage to the first housing 11 and ensuring the reliability of the device.

[0059] In some embodiments of the present invention, the first circuit board 15 is made of a flexible material; a magnetic sheet 151 is provided on the side end face of the first circuit board 15 facing away from the first coil group 14. The magnetic sheet 151 is arranged corresponding to the first coil group 14 to fix the first coil group 14 below the first magnet group 12, and also presses the ball group 19 against the first housing 11. By increasing the pre-pressure attraction between the magnetic sheet 151 and the magnet, a pre-pressure is provided to tightly press the ball between the lens seat 16 and the first housing 11, and to make the position of the first coil group 14 as close as possible to the first magnet group 12, so as to ensure that the magnetic field force between the first magnet group 12 and the energized first coil part is relatively stable. No additional pressure component is needed, the stress of the elastic component is reduced, and the drop resistance of the first spring group 18 is improved.

[0060] like Figure 17 , 18 As shown, in some embodiments of the present invention, one end of the first spring assembly 18 is connected to the first base 13, and the other end extends to the bottom of the first coil assembly 14 and abuts against the first circuit board 15, so as to fix the first coil assembly 14 to the bottom of the first magnet assembly 12 and press the ball assembly 19 against the first housing 11. The first spring assembly 18 adopts a pre-compression design. The first spring assembly 18 provides pre-compression to the first movable part through deformation to press the ball tightly between the lens seat 16 and the first housing 11, overcoming the gravity of the first movable part after assembling the lens 17. When mounting a lighter lens 17, it can save costs better and does not require the addition of a magnetic conductive sheet 151.

[0061] In some embodiments of the present invention, the first spring assembly 18 includes at least two leaf springs, and the first ball assembly 19 includes at least three balls.

[0062] In some embodiments of the present invention, the first magnet group 12 includes at least two first magnets arranged perpendicularly 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 ring, with adjacent first magnets 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 move in multiple directions and rotate around itself, resulting in better optical image stabilization. Specifically, the first coils are symmetrically placed with the N and S poles of the first magnets opposite each other, changing the direction of the coil current to achieve a consistent direction of coil thrust.

[0063] In some embodiments of the present invention, the first coil group 14 can be connected to the first circuit board 15 by welding with a wound wire (enameled wire) material, or the first circuit board 15 can be connected by surface mounting.

[0064] In some embodiments of the present invention, at least two first position sensors 152 are further provided on the first circuit board 15. The first position sensors 152 are connected to a controller. When shaking occurs, the controller can calculate the displacement required for image stabilization based on the information transmitted by the first position sensors 152 and send the displacement information to the first circuit board 15. The first circuit board 15 energizes the first coil group 14 to obtain magnetic force, which drives the lens to move in the opposite direction to the previous shaking to complete image stabilization. The first position sensors 152 are disposed on the end face of the first circuit board 15 facing away from the first coil. Multiple first position sensors 152 can also be provided. The combined action of multiple first position sensors 152 can obtain more accurate shaking or displacement information. Specifically, the first circuit board 15 includes at least one first position sensor 152 and at least one first coil interleaved and bonded in a flexible circuit board. If one first coil can satisfy the translation in one axial direction, only one coil can be used, which can effectively save material costs and improve production efficiency.

[0065] In some embodiments of the present invention, a first terminal 131 is provided on the first base 13. The first terminal 131 is electrically connected to the chip circuit board 3 through the chip-moving motor module 2. The first circuit board 15 is electrically connected to the first terminal 131 through the first spring assembly 18. Information from the first position sensor 152 is output through the first terminal 131, and the displacement control information required by the circuit board is also input through the first terminal 131. Multiple first terminals 131 can be provided, which can be respectively set at the four corners of the first base 13, thereby improving the reliability of electrical connections within the device. During installation, one end of the spring in the first spring assembly 18 is connected to the first circuit board 15 for conduction, and the other end is connected to the first terminal 131 for conduction.

[0066] like Figure 10-13 As shown, in some embodiments of the present invention, the second movable part includes a second circuit board 26, which is mounted on the second coil base 24. The third movable part 32 is electrically connected to the second circuit board 26. The second circuit board 26 is connected to a controller through the third movable part 32. After a jitter 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 it forms a thrust between the coil group 23 and the second magnet group 22 and drives the image chip 34 on the third movable part 32 to move in the opposite direction to the jitter, thereby achieving optical image stabilization.

[0067] In some embodiments of the present invention, the second circuit board 26 is made of flexible circuit board material and is mechanically fixed to the second coil base 24. The second coil group 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 jitter occurs, the controller can perform calculations based on the information transmitted by the second position sensor. The second magnet group 22 includes at least one driving magnet 221 and one position magnet 222. The driving magnet 221 can be set to two or four, and the driving magnet 221 is set corresponding to the second coil group 23. The driving magnet 221 is used to generate thrust by electromagnetic induction with the second coil group 23. The coils in the second coil group 23 can also be set to two or four, respectively, to meet the anti-shake requirements of different working conditions. The position magnet 222 is set opposite to the second position sensor and is used to cooperate with the second position sensor to sense the magnetic field. Specifically, the second coil and the N pole and S pole of the second magnet are placed symmetrically opposite to each other to change the direction of the coil current and realize that the direction of the coil thrust is consistent.

[0068] In some embodiments of the present invention, the second magnet assembly 22 is fixed inside the second housing 21 by a magnet bracket 28, and the magnet bracket 28 fixes the second magnet assembly between the second base 25 and the second housing 21.

[0069] In some embodiments of the present invention, the central portion of the second coil base 24 is provided with a clearance space to allow optical path connection between the lens 17 and the image chip 34. The clearance space communicates with the through hole at the bottom of the lens base 16, and the bottom of the lens 17 can enter the clearance space. The inner sidewall of the second coil base 24 and the lens 17 also have a certain gap. The purpose of this is that when the lens moving module is working, the lens 17 performs lens translation movement. The gap can avoid mechanical interference between the lens and the second lens base 16, which would result in the inability to achieve image stabilization and poor focusing effect.

[0070] like Figure 14As shown, 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 is connected to the third movable part 32, the second arm 332 is connected to the first arm 331 and the third arm 333, and the third arm 333 is connected to the third fixed part 31. The included angle between the first arm 331 and the third arm 333 ranges from 75° to 105°. The deformable arm 33 is made entirely of a flexible material and can deform when the third movable part 32 moves to prevent the third fixed part 31 from moving accordingly. Two deformable arms 33 can be provided. The connection points of the two first arms 331 are connected to the second circuit board 26. Through a soldering process, the second circuit board 26 and the chip circuit board 3 are connected and conductive, and the signal transmission is the control signal through the chip circuit board 3.

[0071] In some embodiments of the present invention, the included angle range of the first arm 331 and the second arm 332 is 35-55°, and the included angle range of the second arm 332 and the third arm 333 is 35-55°. The similar included 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, which could cause damage.

[0072] In some embodiments of the present invention, the second arm 332 may also be configured as an arc, the radius of the second arm 332 is R > 0.5 mm, and the two ends of the arc are respectively connected to the first arm 331 and the third arm 333.

[0073] 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 (layer stacking = 1 layer) or multi-layer (layer stacking ≥ 2 layers) design. During the autofocus movement, the deformable arm 33 may deform. When the deformable arm 33 adopts a multi-layer board stacking design, there are gaps between adjacent boards. The gaps between adjacent boards can improve the torsional resistance at the deformable arm. Its layered design advantage is to reduce the K-value coefficient of the material. For the same structural design, the elastic constant of a single-layer design will be higher than that of a layered design, which will increase power consumption. The deformable arm 33 may be composed of vertically arranged multi-layer boards or horizontally arranged multi-layer boards. If the elastic constant of the material is small and the magnetic thrust generated by the coil is sufficient, the deformable arm 33 may adopt a non-layered (i.e., stacked without gaps) design, reducing material and process costs.

[0074] In some embodiments of the present invention, the second bridging portion includes a second spring assembly 27, which is fixedly connected to the second movable portion and the second fixed portion. The second spring assembly 27 includes a separate spring assembly connecting the second coil base 24 and the second housing 21, and an independent spring assembly connecting the coil base and the chip circuit board 3.

[0075] In some embodiments of the present invention, the second spring group 27 includes at least two springs distributed along the vertical direction of the chip moving motor module 2, the installation distance between the at least two springs being more than 50% of the height of the chip moving motor module, and located at the top and bottom of the chip moving motor module 2 respectively. The farther apart the two springs are, the better the optical image stabilization adjustment effect on the chip circuit board 3.

[0076] like Figure 15 As shown, in some embodiments of the present invention, the independent spring group of the second spring group 27 includes a spring coil 271, on which at least four spring wires 272 are arranged in a circular arrangement. The width of the spring wire 272 is set to B, and the thickness is set to u, wherein B / t satisfies 2:1 and at least one spring wire 272 has a width that is different from the width of another solid spring wire 272. The shape of the spring wire 272 can be non-rotationally symmetric, and the direction needs to be distinguished during installation. By adjusting the width of at least one solid spring wire 272, the spring force value exerted by it is different from that of the spring wires 272 of other solid springs, and the suspension force is different. This facilitates design adjustment and satisfies the problem that uneven force on the second movable part causes tilting during movement. The inconsistent width of at least one spring wire 272 is used to compensate for the design and achieve force balance in the moving part of the structure, so as to achieve smooth movement during autofocus. Alternatively, due to structural space limitations, a rotationally symmetric design of the spring wire 272 cannot be adopted, and a non-rotationally symmetric design can be adopted to better utilize its internal structural space.

[0077] like Figure 16 As shown, in some embodiments of the present invention, the second spring group 27 includes at least four independent individual springs 273, wherein the width of each individual spring 273 is set to W, and the thickness is set to t, wherein W / t satisfies a ratio of 2:1, and the thickness of at least one individual spring 273 differs from the thickness of the other individual springs 273 by 10%. The advantage is that by adjusting the thickness of at least one individual spring 273 to ensure that its elastic force value is inconsistent with that of the other individual springs 273, the suspension force is inconsistent, facilitating design adjustments. This addresses the issue of uneven force distribution in the second movable part causing tilting during movement. The inconsistent thickness of at least one individual spring 273 compensates for this design imbalance, achieving force balance in the moving part of the structure and enabling smooth movement during autofocus.

[0078] like Figure 19-21As shown in the preferred embodiment of this application, the lens-moving motor module 1 achieves image stabilization by moving the lens 17. It includes a first fixed part and a first movable part. The first movable part includes a lens mount 16, a first circuit board 15 fixed to the lens mount 16, and a first coil group 14 fixed to the first circuit board 15. The first coil group 14 has four coils arranged in a circle, perpendicular to each other in pairs. The first fixed part includes a first housing 11, a first base 13, and a first magnet group 12 fixed to the first housing 11. The first magnet group 12 has four first magnets arranged in a circle, perpendicular to each other in pairs. Three ball bearings are disposed between the first housing 11 and the lens mount 16. The first coil group 14 and the ball bearings are pressed against the first magnet group 12 by a first spring group 18. When energized, the first coil group 14 has magnetic force, which interacts with the first magnets fixed to the first housing 11, pushing the lens 17 fixed inside the lens mount 16 to move and achieve optical image stabilization. The mirror 17 moving motor module 1 and the stacked and fixed chip moving motor module 2 achieve image stabilization 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 housing 21 and a second magnet group 22 fixed to the second housing 21. The second magnet group 22 has four drive magnets 221 and one position magnet 222. The second movable part includes a second coil base 24 and a second coil group 23 fixed to the second coil base 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. The third fixed part 31 is provided with an image chip 34 that receives optical information from the lens 17. When the second coil group 23 is energized, it generates magnetic force, interacts with 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.

[0079] In summary, the embodiments of the present invention provide a stabilized lens module in which the first magnet group 12 and the second magnet group 22 are both fixed to the immovable first housing 11 and the second housing 21. External magnetic force will not affect the first magnet group 12 and the second magnet group 22, thus ensuring their stability in the system and the stabilization effect of the system. The direct connection between the magnet group 12 and the housing also improves the space utilization of the system, realizes the size control and simplification of the device, and facilitates assembly.

[0080] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A lens stabilization module, characterized in that, include: A lens-moving motor module includes a first fixed part and a first movable part connected to each other. The first fixed part includes 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 includes a first coil group, a first circuit board, and a lens holder. A lens is fixed inside the lens holder. The first circuit board is fixed to the lens holder. The first coil group is fixed on the first circuit board and is correspondingly arranged with the first magnet group. The first fixed part and the first movable part are connected by a first bridging part. A chip-moving motor module is stacked with the lens-moving motor module. 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 housing and a second magnet assembly. The second housing is fixedly connected to the first base, and the second magnet assembly is fixed to the second housing. The second movable part includes a second coil assembly and a second coil seat. The second coil assembly is fixed to the second coil seat and is correspondingly arranged with the second magnet assembly. The second fixed part and the second movable part are connected through 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. An image chip corresponding to the lens is disposed on the third movable part. The third movable part is connected to the second movable part. The third fixed part and the third movable part are connected through a deformable arm.

2. The image stabilization lens module according to claim 1, characterized in that: The first bridging part includes a first spring assembly and a ball assembly. The first spring assembly connects the lens mount and the first base, and the ball assembly connects the lens mount and the first housing.

3. The image stabilization lens module according to claim 2, characterized in that: A magnetic sheet is provided on the side of the first circuit board facing away from the first coil group. The magnetic sheet is positioned corresponding to the first coil group to fix the first coil group below the first magnet group and to press the ball group against the first housing.

4. The image stabilization lens module according to claim 2, characterized in that: One end of the first spring assembly is connected to the first base, and the other end extends to the bottom of the first coil assembly and abuts against the first circuit board, so as to fix the first coil assembly under the first magnet assembly and press the ball assembly against the first housing.

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

6. The image stabilization lens module according to claim 5, characterized in that: The first circuit board is also provided with at least two first position sensors, which are disposed on the end face of the first circuit board facing away from the first coil.

7. The image stabilization lens module according to claim 2, characterized in that: The base is provided with a first terminal, which is electrically connected to the chip circuit board through the chip moving motor module. The first circuit board is electrically connected to the first terminal through the first spring assembly.

8. The image stabilization lens module according to claim 1, characterized in that: The second movable part includes a second circuit board, which is mounted on the second coil base, and the third movable part is electrically connected to the second circuit board.

9. The image stabilization lens module according to claim 8, characterized in that: The second circuit board is provided with a second position sensor, and the second magnet group includes at least one driving magnet and a position magnet. The driving magnet is arranged corresponding to the second coil group, and the position magnet is arranged opposite to the second position sensor.

10. The image stabilization lens module according to claim 1, characterized in that: The center portion of the second coil holder is provided with a clearance space to allow optical path connection between the lens and the image chip, and the bottom of the lens can enter the clearance space.

11. The image stabilization 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, and the third arm is connected to the third fixed part. The included angle between the first arm and the third arm ranges from 75° to 105°.

12. The image-stabilized lens module according to claim 11, characterized in that: The angle between the first arm and the second arm ranges from 35° to 55°, and the angle between the second arm and the third arm ranges from 35° to 55°.

13. The image-stabilized lens module according to claim 11, characterized in that: The second arm is designed to be arc-shaped, and the radius of the second arm is R > 0.5 mm.

14. The image stabilization lens module according to claim 1, characterized in that: The chip circuit board can 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 image stabilization lens module according to claim 1, characterized in that: The second bridging part includes a second spring assembly, which is fixedly connected to the second movable part and the second fixed part.

16. The image stabilization lens module according to claim 15, characterized in that: The second spring assembly comprises at least two springs, and the mounting distance between the at least two springs exceeds 50% of the height of the chip-mounted motor module.

17. The image-stabilized lens module according to claim 15, characterized in that: The second spring assembly includes a spring coil with at least four spring wires arranged in a circular pattern. The width of each spring wire is set to B, and the thickness is set to u, where B / t satisfies a ratio of 2:1 and at least one spring wire has a width that is different from the width of another physical spring wire.

18. The image-stabilized lens module according to claim 15, characterized in that: The second spring group includes at least four independent single springs, the width of which is set to W and the thickness to t, wherein 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%.

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