Variable aperture device and camera module

Abstract

The invention provides a variable aperture device and a camera module, the variable aperture device comprises at least one stator, at least one rotor and at least one shell, the rotor is movably assembled on the stator, and the shell is assembled on the stator; the at least one driving assembly is used for driving the rotor to do axial movement relative to the stator; the motor comprises a stator, a rotor and a plurality of adjusting parts, at least one light through hole is defined by the adjusting parts, the adjusting parts are adjustably installed on the stator and the rotor, and along with the relative movement of the rotor relative to the stator, the relative position of the adjusting parts is driven to change so as to define the size of the light through hole; wherein the mover is installed on the outer side of the inner circumferential wall of the stator and located between the stator and the shell in the direction perpendicular to the optical axis; and each adjusting piece is rotatably connected to the rotor and is slidably connected to the stator.

Description

Technical Field

[0001] The present application relates to the field of camera modules, and more specifically to a variable aperture device and a camera module. Background Art

[0002] The camera module is an important part of smart devices, and its use experience greatly affects the user experience of using smart devices. As a part of the camera module, the design of the aperture has an important impact on the user experience of the camera module. In order to meet higher shooting requirements, variable aperture devices are becoming more and more widely used. The shooting environment of electronic devices equipped with camera modules is diverse and changeable, and the shooting requirements are redundant. For example, when the light is strong, a deeper depth of field and a sharper picture can be obtained by reducing the aperture. When the light is insufficient, a pure picture with higher exposure and lower noise can be obtained by increasing the aperture.

[0003] The miniaturization of camera modules is a major trend. The size of camera modules is required to become smaller and smaller to reduce the space occupied by electronic equipment. The variable aperture device, as an important component of the camera module, has an important impact on the overall size of the camera module.

[0004] A common variable aperture device mainly includes a housing, a mover and a stator. The mover and the stator are assembled together, and the housing covers the outside of the mover and the stator. The shape, wall thickness, assembly, and positional relationship of the mover and the stator will affect the size of the variable aperture device. The mover is usually clamped between the inner circumferential wall and the outer circumferential wall of the stator, and then the housing is installed outside the stator. The inner side of the inner circumferential wall of the stator defines the installation space of the optical lens. The optical lens needs to lean against and adhere to the inner surface of the inner circumferential wall. Therefore, the inner circumferential wall of the stator is inevitable and needs to have a certain strength, that is, a certain thickness, which occupies a certain design space inside the variable aperture device. The outer circumferential wall also has a certain thickness, which further occupies the design space inside the variable aperture device, resulting in a small internal design space of the variable aperture device and difficulty in reducing the size.

[0005] In addition to the above problems, the current variable aperture device also has some other problems. The aperture size adjustment of the variable aperture device is achieved by driving the blades to change the size of the light hole defined by the blades through the mover. The blades are movably mounted on the mover and the stator, and move with the movement of the mover relative to the stator. The blades are connected to the mover and the stator through two holes respectively to rotate around the mover and the stator or slide relatively. Therefore, the blades themselves also have a certain degree of mobility and are prone to shaking, resulting in abnormal noises in the variable aperture device and unstable opening and closing of the blades.

[0006] The connection strength of the variable aperture device will affect the reliability and stability of the variable aperture device. The assembly and connection method between the housing and the stator will affect the connection strength of the variable aperture device. If only the usual gluing method is used for connection, the connection strength will be affected by the gluing area, glue performance and other factors.

[0007] In addition, in order to match the arc shape of the variable aperture device, the driving magnet and other magnets assembled in the variable aperture device are also usually arc-shaped magnets. When arc-shaped magnets are mass-produced, different batches are prone to differences, and the manufacturing tolerance and measurability are poor, which easily causes large batch variations of the variable aperture device. Summary of the invention

[0008] One advantage of the present application is that it provides a variable aperture device and a camera module, and reduces the size of the variable aperture device by improving the design, making the variable aperture device more miniaturized.

[0009] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein the stator design of the variable aperture device is optimized, and the outer peripheral wall structure is omitted to reduce the size of the stator.

[0010] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein the wall thickness of the housing of the variable aperture device is reduced to further reduce the size of the variable aperture device and expand the design space inside the variable aperture device.

[0011] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein a mover of the variable aperture device is located between a stator and a housing in a direction perpendicular to the optical axis, thereby optimizing the design of the stator, replacing the outer peripheral wall of the stator with a housing with a thinner wall thickness, and reducing the size of the variable aperture device.

[0012] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein the mover is provided with a space to accommodate the mounting wall of the stator, thereby achieving inwardly matched installation of the driving magnet and the coil, thereby avoiding enlarging the size of the variable aperture device.

[0013] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein the variable aperture device includes a magnetic attraction element for generating a self-locking force to lock the mover to the stator, so as to improve the stability of the variable aperture device.

[0014] One advantage of the present application is that it provides a variable aperture device and a camera module, which generate a self-locking force along the movement direction of the mover, and generate a self-locking force when the mover moves to a maximum stroke, so as to maintain the stability of the mover relative to the stator.

[0015] One advantage of the present application is that it provides a variable aperture device and a camera module, in which the second magnetic part parallel to the optical axis and the magnet are adjacently arranged along the movement direction to interact with each other to generate a self-locking force.

[0016] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein the housing and the stator are provided with mutually matching concave and convex designs to increase the adhesive area and enhance the connection strength.

[0017] One advantage of the present application is that it provides a variable aperture device and a camera module, wherein the end of the magnetic element protrudes from the outside of the stator and is suitable for welding to the outer shell to enhance the connection strength.

[0018] One advantage of the present application is that it provides a variable aperture device and a camera module, which uses two square magnets arranged at an angle instead of a single arc-shaped magnet to improve manufacturing accuracy, reduce batch differences, and reduce tolerances.

[0019] One advantage of the present application is that it provides a variable aperture device and a camera module, and improves the design of the ball groove for accommodating the balls to fill the gaps between the balls and improve the relative stability of the mover and the stator.

[0020] According to one aspect of the present application, the present application provides a variable aperture device, comprising:

[0021] At least one stator, at least one mover and at least one housing, wherein the mover is movably mounted on the stator and the housing is mounted on the stator;

[0022] At least one driving assembly is used to drive the mover to move around the axis relative to the stator; and

[0023] A plurality of adjusting members, each of which defines at least one light-through hole, and is adjustably mounted on the stator and the mover. As the mover moves relative to the stator, the relative position of the adjusting member changes, thereby defining the size of the light-through hole;

[0024] Wherein, the mover is installed on the outer side of the inner peripheral wall of the stator, and is located between the stator and the housing in a direction perpendicular to the optical axis;

[0025] Each of the adjusting members is rotatably connected to the mover and slidably connected to the stator.

[0026] According to an example of the present application, the stator is provided with a first positioning column, and the mover is provided with a second positioning column, the first positioning column is closer to the optical axis of the variable aperture device than the second positioning column, wherein the adjusting member rotates around the second positioning column and slides relative to the first positioning column.

[0027] According to an example of the present application, the stator is provided with a first drive mounting portion, the first drive mounting portion is located on the side of the stator opposite to the inner circumferential wall, the mover is provided with a second drive mounting portion, the second drive mounting portion is provided with an avoidance groove, and after the mover is assembled to the stator, the first drive mounting portion is located in the avoidance groove.

[0028] According to an example of the present application, the driving component includes a driving magnet and a driving coil, the driving magnet is mounted on the second driving mounting portion, the driving coil is mounted on the first driving mounting portion, the driving magnet and the driving coil are adjacent to each other in a direction perpendicular to the optical axis and interact with each other to drive the mover to move around the axis relative to the stator.

[0029] According to an example of the present application, the second drive mounting portion is provided with a mounting groove, the mounting groove is closer to the optical axis than the avoidance groove, and the drive magnet is installed in the mounting groove.

[0030] According to an example of the present application, the first drive mounting portion includes a first mounting wall and a second mounting wall, and the first mounting wall and the second mounting wall are extended from the outer periphery of the bottom wall of the stator in a direction parallel to the optical axis at intervals, and an installation space is defined between the first mounting wall and the second mounting wall for installing the drive coil, wherein the installation space passes through the bottom wall, and the drive coil is located on the inner side of the outer periphery of the bottom wall of the stator after being installed in the installation space.

[0031] According to an example of the present application, the driving component includes a circuit board, the circuit board includes an annular portion and an axial portion, the annular portion is located between the bottom wall of the stator and the bottom of the mover, the axial portion is bent relative to the annular portion and extends in a direction parallel to the optical axis, the axial portion is installed in the space, and is connected to the driving coil circuit.

[0032] According to an example of the present application, the outer peripheral edge of the bottom wall is provided with spaced-apart bosses, and the end of the outer peripheral wall is provided with staggered recesses and protrusions, the bosses are located axially below the recesses, and the protrusions are located on the outside of the outer peripheral edge.

[0033] According to an example of the present application, the variable aperture device also includes at least one interacting magnet and at least one magnetic attraction element, the magnetic attraction element includes at least one first magnetic part and at least one second magnetic part that are integrally formed, the first magnetic part is arranged on at least one side of the magnet parallel to the optical axis direction, and the second magnetic part is arranged on at least one side of the magnet along at least one movement direction, when the mover moves along the movement direction to the second magnetic part to generate a magnetic attraction force on the magnet, the mover is locked relative to the stator.

[0034] According to an example of the present application, the first magnetic portion extends in a direction perpendicular to the optical axis, the second magnetic portion extends in a direction parallel to the optical axis, and the second magnetic portion is formed by being bent integrally with respect to the first magnetic portion.

[0035] According to an example of the present application, when the mover moves along at least one of the movement directions until the light-through hole reaches at least one limit state, the second magnetic part generates a magnetic attraction force on the magnet.

[0036] According to an example of the present application, the magnetic attraction element is built into the stator, the first magnetic part is built into the bottom wall and is located axially below the mover, the stator includes a magnetic protrusion, and the magnetic protrusion extends protrudingly from the outer surface of the inner circumferential wall of the stator, and the second magnetic part is built into the magnetic protrusion to be located in the movement direction of the mover.

[0037] According to an example of the present application, the variable aperture device further includes a ball, a movable space for the ball to move is defined between the stator and the mover, and at least one ball located in at least one of the movable spaces is abutted against at least one inclined surface. According to another aspect of the present application, the present application provides a camera module, including:

[0038] Optical lenses; and

[0039] The variable aperture device is installed on the optical lens to adjust the amount of light entering the camera module.

[0040] According to an example of the present application, the variable aperture device further includes at least one magnetic conductive element, the magnetic conductive element and the magnetic attraction element are arranged in a direction parallel to the optical axis, and the magnetic conductive element is arranged below the magnetic attraction element in an axial direction, close to the bottom of the variable aperture device.

[0041] The magnetic conductive element interacts with the magnet of the optical lens, and the magnetic attraction element interacts with the magnet of the variable aperture device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a three-dimensional schematic diagram of a variable aperture device according to a preferred embodiment of the present application.

[0043] Figure 2 It is an exploded schematic diagram of a variable aperture device according to a preferred embodiment of the present application.

[0044] Figure 3A It is a three-dimensional schematic diagram of the internal structure of a variable aperture device according to a preferred embodiment of the present application.

[0045] Figure 3B It is a three-dimensional schematic diagram of a partial structure of a variable aperture device according to a preferred embodiment of the present application.

[0046] Figure 4 It is a three-dimensional schematic diagram of a variable aperture device according to a preferred embodiment of the present application with its housing in an open state.

[0047] Figure 5 It is a schematic diagram of an implementation of a magnet assembly and a magnetic assembly of a variable aperture device according to a preferred embodiment of the present application.

[0048] Figure 6 It is a schematic diagram of a partial structure of a magnetic component of a variable aperture device according to a preferred embodiment of the present application.

[0049] Fig. 7A and Figure 7B It is a schematic diagram of a variable aperture device in a minimum aperture state according to a preferred embodiment of the present application.

[0050] Fig. 8A and Figure 8B It is a schematic diagram of a variable aperture device in an aperture limit state according to a preferred embodiment of the present application.

[0051] Fig. 9 It is a schematic cross-sectional view perpendicular to the axial direction of a variable aperture device according to a preferred embodiment of the present application.

[0052] Fig. 10A FIG. 1 is another schematic cross-sectional view perpendicular to the axial direction of a variable aperture device according to a preferred embodiment of the present application.

[0053] Fig. 10B It is a schematic cross-sectional view and a partial enlarged view along the axial direction of a variable aperture device according to a preferred embodiment of the present application.

[0054] Fig.11A It is a schematic diagram of a mover of a variable aperture device according to a preferred embodiment of the present application.

[0055] Fig. 11B yes Figure 1 Schematic cross-sectional view along line AA'.

[0056] Fig.12 It is a stereoscopic view and a partially enlarged view observed from the bottom perspective according to a preferred embodiment of the present application. DETAILED DESCRIPTION

[0057] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0058] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0059] It is understandable that the term "one" should be understood as "at least one" or "one or more", that is, in a preferred embodiment, the number of a piece can be one, while in another preferred embodiment, the number of the piece can be multiple, and the term "one" cannot be understood as a limitation on quantity.

[0060] The present application provides a variable aperture device, referring to Figure 1 and Figure 2 , comprises a housing 10, a stator 20, a mover 30, a driving assembly 40 and an adjusting assembly 50, wherein the mover 30 is movably mounted on the stator 20, the housing 10 is mounted on the stator 20, the driving assembly 40 is mounted on the stator 20 and the mover 30, and drives the mover 30 to move around the axis relative to the stator 20. The adjusting assembly 50 is mounted on the stator 20 and the mover 30, and the adjusting assembly 50 defines at least one light hole 500, and the light hole 500 has an optical axis L. The mover 30 is driven by the driving assembly 40, and moves around the optical axis L relative to the stator 20, so as to drive the adjusting assembly 50 to adjust the size of the light hole 500.

[0061] For ease of description, the direction parallel to the optical axis L is defined as the axial direction, the direction perpendicular to the optical axis L is defined as the radial direction, and the direction in which the mover moves around the axis is defined as the circumferential direction, which is perpendicular to the axial direction and the radial direction.

[0062] The adjustment assembly 50 includes a plurality of adjustment members 51 , each of which is mounted on the stator 20 and the mover 30 and defines an adjustable light-through hole 500 . Each of the adjustment members 51 is driven as the mover 30 moves relative to the stator 20 , thereby adjusting the size of the light-through hole 500 .

[0063] The stator 20 includes an inner peripheral wall 21 and a bottom wall 22. The inner peripheral wall 21 extends around the optical axis L and in a direction parallel to the optical axis L. The bottom wall 22 extends from an end of the inner peripheral wall 21 in a direction perpendicular to the optical axis L and away from the optical axis L.

[0064] The mover 30 is installed on the outer side of the inner peripheral wall 21. The mover 30 includes an inner peripheral portion 31, a top portion 32, an outer peripheral portion 33 and a bottom portion 34. The inner peripheral portion 31 is formed on the inner side of the mover 30 around the optical axis L and is located on the outer side of the inner peripheral wall 21, the adjustment assembly 50 is suitable for being installed on the top portion 32, the outer peripheral portion 33 faces the opposite direction away from the optical axis L, is formed on the outer side of the mover 30 around the optical axis L, and the bottom portion 34 faces the bottom wall 22.

[0065] The housing 10 includes a cover wall 11 and a peripheral wall 12. The cover wall 11 is suitable for covering the top of the stator 20 and the mover 30. The cover wall 11 has an opening 100. The peripheral wall 12 is formed by extending from the outer peripheral end of the cover wall 11 around the optical axis L in a direction parallel to the optical axis L. The housing 10 is assembled to the stator 20 and the mover 30, and the light-through hole 500 defined by the adjustment assembly 50 is exposed from the opening 100. The peripheral wall 12 surrounds the circumference of the stator 20 and the mover 30, and the mover 20 is located between the peripheral wall 12 and the inner peripheral wall 21 in a direction perpendicular to the optical axis L.

[0066] The housing 10 is designed to have a smaller thickness, so that the thickness of the cover wall 11 and the peripheral wall 12 are smaller, thereby effectively reducing the size of the variable aperture device in the direction perpendicular to the optical axis L and parallel to the optical axis L.

[0067] Compared with conventional stator designs, the outer peripheral wall of the stator 20 provided in the present application is eliminated, effectively reducing the size of the stator, and using a smaller thickness peripheral wall 12 to cover the periphery of the stator 20 and the mover 20, further reducing the size of the variable aperture device in the direction perpendicular to the optical axis L.

[0068] The inner peripheral wall 21 and the bottom wall 22 of the stator 20 are integrally formed, and the housing 10 and the mover 30 are respectively integrally formed, which reduces the number of assembly steps and the difficulty of assembly.

[0069] Furthermore, the driving assembly 40 includes a ball 41, which is installed between the stator 20 and the mover 30 to assist the mover 30 in axial movement relative to the stator 20. By providing the ball 41, the friction between the mover 30 and the stator 20 can be reduced, the motion power consumption can be reduced, and the efficiency of aperture size adjustment can be improved.

[0070] In one embodiment, the variable aperture device is driven by a voice coil motor. Specifically, the driving assembly 40 includes a driving magnet 42 and a driving coil 43, which interact with each other to drive the mover 30 to move relative to the stator 20.

[0071] In some examples, the driving magnet 42 and the driving coil 43 are arranged in the axial direction; in some examples, the driving magnet 42 and the driving coil 43 are assembled to the stator 20 and the mover 30. The stator 20 is provided on the first driving mounting portion 23, and the mover 30 is provided with a second driving mounting portion, which is suitable for mutually adaptably mounting the driving magnet 42 and the driving coil 43.

[0072] Optionally, the driving magnet 42 is mounted on the stator 20 , and the driving coil 43 is mounted on the mover 30 .

[0073] Optionally, the driving magnet 42 is mounted on the mover 30, and the driving coil 43 is mounted on the stator 20. Further, the driving coil 43 is mounted on the first driving mounting portion 23; and the driving magnet 42 is mounted on the second driving mounting portion.

[0074] The first drive mounting portion 23 and the second drive mounting portion are adapted to be designed so that the first drive mounting portion 23 and the second drive mounting portion are adjacent to each other in a direction perpendicular to the optical axis L. The first drive mounting portion 23 is disposed on the inner wall 21 of the stator 20, and correspondingly, the second drive mounting portion is disposed on the inner periphery 31 of the mover 30; the first drive mounting portion 23 is disposed on the outer side opposite to the inner wall 21 of the stator 20, and correspondingly, the second drive mounting portion is disposed on the outer periphery 33 of the mover 30.

[0075] Reference Figure 3A As shown in the figure, the first driving installation part 23 is arranged on the outer periphery of the side opposite to the inner wall 21 of the stator 20. The first driving installation part 23 includes a first installation wall 231 and a second installation wall 232, and the first installation wall 231 and the second installation wall 232 are extended from the outer periphery 222 of the bottom wall 22 in a direction parallel to the optical axis L at intervals. The first installation wall 231 and the second installation wall 232 define an installation space 230, which is suitable for installing the driving coil 43.

[0076] Furthermore, combined with Figure 3A 10 , the axial outer peripheral surfaces of the first mounting wall 231 and the second mounting wall 232 are flush with the outer peripheral edge 222 , or are implemented so as not to exceed the boundary axially defined by the outer peripheral edge 222 to avoid increasing the size of the stator 20 in a direction perpendicular to the optical axis L.

[0077] The installation space 230 is implemented to penetrate the bottom wall 22, that is, to be radially grooved from the outer periphery of the bottom wall 22 along 222 toward the direction of the optical axis L, so that the portion of the bottom wall 22 located between the first installation wall 231 and the second installation wall 231 is recessed inward to form the installation space 230, and the first drive installation portion 23 formed thereby will not increase the size of the stator 20 in the direction perpendicular to the optical axis L.

[0078] Reference Figure 3BAs shown in FIG. 2 , the second drive mounting portion is disposed on the outer periphery 33 of the mover 30. The outer periphery 33 is provided with at least one drive mounting groove 3302, and the drive magnet 42 is assembled in the drive mounting groove 3302. Further, the opening of the drive mounting groove 3302 faces the first drive mounting portion 23, so that the drive magnet 42 faces the coil 43.

[0079] In order to reduce the size of the variable aperture device, the peripheral portion 33 is provided with an avoidance groove 3301, and the avoidance groove 3301 is formed in the second drive mounting portion, so that the outer surface of the second drive mounting portion facing the opposite side of the optical axis L is closer to the optical axis L than the outer surface of other positions of the mover 30, and the radial thickness of the second drive mounting portion is smaller. After the mover 30 is assembled to the stator 20, the first drive mounting portion 23 is located in the avoidance groove 3301, avoiding increasing the size of the variable aperture device in the direction perpendicular to the optical axis L. That is, the second drive mounting portion is provided with an avoidance space for accommodating the first drive mounting portion 23, so that after the mover 30 and the stator 20 are assembled together, the second drive mounting portion and the first drive mounting portion 23 cooperate with each other to avoid increasing the overall size of the variable aperture device.

[0080] After the housing 10 is mounted on the stator 20, the peripheral wall 12 is located outside the first drive mounting portion 23 and the peripheral portion 33 of the mover 30. The peripheral wall 12 has a relatively small thickness, and when combined with the cover wall 11 having a relatively small thickness, it is beneficial to reduce the dimensions of the variable aperture device in the directions parallel to the optical axis and perpendicular to the optical axis L.

[0081] The mounting groove 3302 is opened in the avoidance groove 3301 in the form of further reducing the radial size of the mover 30, that is, the inner wall surface defining the avoidance groove 3301 is further grooved in the direction of the optical axis L. Alternatively, the mounting groove 3302 is formed by digging a groove on the side of the inner wall surface defining the avoidance groove 3301 close to the optical axis L to avoid increasing the radial size of the mover 30. The driving magnet 42 is installed in the mounting groove 3302, and the first driving mounting portion 23 is located on the outside of the mounting groove 3302, so that the driving magnet 42 and the driving coil 43 are opposite to each other, which is convenient for interaction to drive the mover 30 to move. In other examples of the present application, the mover 30 is installed with a coil 43, and the coil 43 is suitable for being installed in the mounting groove 3302; the stator 20 is installed with a driving magnet 42, and the driving magnet 42 is installed in the installation space 230. That is, the mover 30 forms a first drive mounting portion by slotting, and the stator 20 forms a second drive mounting portion by setting a mounting wall, so that the second drive mounting portion can be accommodated in the first drive mounting portion, avoiding increasing the size of the variable aperture device perpendicular to the optical axis L.

[0082] The driving assembly 40 includes a circuit board 44, which is suitable for connecting an external circuit to provide power and communication for the variable aperture device. Preferably, the circuit board 44 is installed between the stator 20 and the mover 30, and further, between the bottom wall 22 and the bottom 34. The circuit board 44 is built into the variable aperture device. Specifically, the circuit board 44 is installed on the stator 20 in a manner of being attached to the top surface 221 of the bottom wall 22, and the bottom 34 of the mover 30 faces the circuit board 44.

[0083] The bottom wall 22 of the stator 20 serves as the bottom of the variable aperture device, which is conducive to keeping the bottom of the variable aperture device flat. In addition, the stator 20 can be made of plastic in one piece, which can improve the flatness of the stator 20.

[0084] Further, the circuit board 44 includes an annular portion 441 and an axial portion 442, the annular portion 441 is located between the stator 20 and the mover 30, and the inner peripheral wall 21 surrounding the stator 20 is arranged on the top surface 221 of the bottom wall 22 of the stator 20. The annular portion 441 extends on a plane perpendicular to the optical axis L, and the axial portion 442 is formed by bending integrally with the annular portion 441, and extends in a direction parallel to the optical axis L. The axial portion 442 is suitable for being assembled in the installation space 230, so as to be located on the radial outer side of the coil 43, suitable for being connected to the circuit of the coil 43, and strengthening the structural strength of the coil 43.

[0085] The circuit board 44 further includes an electrical connection portion 443 extending outward from the annular portion 441 and adapted to be electrically connected to an external power source to supply power to the variable aperture device.

[0086] Reference Figures 2 to 4 The adjustment assembly 50 is adjustably mounted on the stator 20 and the mover 30. The adjustment assembly 50 includes a plurality of adjustment members 51, each of which includes an integrally formed first portion 511 and a second portion 512. The first portion 511 is suitable for being mounted on the stator 20 and the mover 30, and an adjustable light-through hole 500 is formed between the second portions 512 of each adjustment member 51. Adjacent adjustment members 51 are arranged in an interlaced manner.

[0087] The first portion 511 is provided with a first hole 501 and a second hole 502, and a plurality of first positioning posts 25 are provided at the top of the stator 20, and the first positioning posts 25 extend in a direction parallel to the optical axis L and are located at the top of the inner peripheral wall 21. A second positioning post 35 is provided at the top 32 of the mover 30, and the second positioning post 35 extends from the top 32 in a direction parallel to the optical axis L. The second positioning post 35 moves as the mover 30 moves around the axis.

[0088] The mover 30 is disposed on the outer side of the inner peripheral wall 21, and correspondingly, the second positioning column 35 is located on the outer side of the first positioning column 25. The adjusting member 51 is movably mounted on the stator 20 and the mover 30 in the form that the second hole 502 is passed through by the second positioning column 35, and the first hole 501 is passed through by the first positioning column 25. The housing 10 is mounted on the stator 20, the mover 30 and the adjusting assembly 50, the first part 511 is located at the top of the stator 20 and the mover 30, and the second part 512 is movably exposed in the opening 100. With the movement of the mover 30, the size of the light-through hole 500 defined by the second part 512 is adjusted.

[0089] As the mover 30 moves around the axis relative to the stator 20, the adjusting member 51 rotates around the second positioning column 35, and the first positioning column 25 located in the first hole 501 slides relative to the adjusting member 51. The first hole 501 is designed to have a certain length for the first positioning column 25 to slide relative to the adjusting member 51 and have a certain movement stroke.

[0090] Correspondingly, if Figure 4 As shown, the cover wall 11 is provided with a plurality of first positioning holes 1101 and a plurality of second positioning holes 1102, which are distributed around the optical axis L. The first positioning holes 1101 are for the first positioning posts 25 to pass through, and the second positioning holes 1102 are for the second positioning posts 35 to pass through. The first positioning holes 1101 are closer to the opening 100 and the optical axis L than the second positioning holes 1102. The second positioning holes 1102 are opened along the circumferential direction and have a certain length, which is adapted to the movement direction and movement stroke of the mover 30. The second positioning posts 35 slide in the second positioning holes 1102. The first positioning holes 1101 position the first positioning posts 25 of the stator 20.

[0091] Reference Figure 3A and Figure 3B The ball 41 is installed on the stator 20 and the mover 30. The stator 20 is provided with a first ball movable part 24, and the mover 30 is provided with a second ball movable part 36. The first ball movable part 24 and the second ball movable part 36 cooperate with each other to define a movable space 410 suitable for the movement of the ball 41.

[0092] The first ball movable portion 24 is disposed on the outer surface of the inner peripheral wall 21 facing the outer side of the stator 20 and is located at the connection between the inner peripheral wall 21 and the bottom wall 22. The second ball movable portion 36 is disposed on the inner peripheral portion 31 of the mover 30.

[0093] In one embodiment, the circumferential distance, i.e., the length, of the first ball movable portion 24 is set to be suitable for the rolling of the ball 41, and the circumferential distance, i.e., the length, of the second movable portion 36 is set to be suitable for the relative sliding of the ball 41. The length of the second ball movable portion 36 is greater than that of the first ball movable portion 24. After the mover 30 is assembled to the stator 20, the two circumferential ends of the first ball movable portion 24 are located between the circumferential ends of the second ball movable portion 36. As the mover 30 moves around the axis, the ball 41 rolls in the first ball movable portion 24, assisting the second ball movable portion 36 to slide relative to the ball 41. The movement direction of the mover 30 is circumferential, including counterclockwise circumferential rotation and clockwise circumferential rotation.

[0094] In another embodiment, the length of the first ball movable portion 25 is greater than the length of the second ball movable portion 36 . The ball 41 rolls in the second ball movable portion 36 , assisting the mover 30 to rotate and slide relative to the first ball movable portion 25 .

[0095] The mover 30 can move in one movement direction until the circumferential end of the first ball moving part 24 is abutted against the circumferential end of the second ball moving part 36, and can move in another movement direction until the other circumferential end of the first ball moving part 24 is abutted against the other circumferential end of the second ball moving part 36.

[0096] According to another aspect of the present application, Reference Figure 2 and Figures 6 to 10B As shown in FIG. 1 , the variable aperture device further includes a magnetic component 60, which is suitable for interacting with at least one magnet to generate magnetic attraction.

[0097] The magnetic assembly 60 includes a magnetic element 61, which is suitable for generating magnetic attraction to a magnet. The magnetic element 61 includes a first magnetic portion 611 and a second magnetic portion 612, wherein the first magnetic portion 611 extends in a direction perpendicular to the optical axis L, and the second magnetic portion 612 extends in a direction parallel to the optical axis L.

[0098] The first magnetic part 611 is arranged on at least one side of at least one magnet in a direction parallel to the optical axis L, and the second magnetic part 612 is arranged on at least one side of the magnet in a direction perpendicular to the optical axis L. The magnetic attraction between the first magnetic part 611 and the magnet is parallel to the optical axis L, and the magnetic attraction between the second magnetic part 612 and the magnet is perpendicular to the optical axis L. Further, the second magnetic part 612 is arranged on at least one side of at least one magnet along the direction of movement.

[0099] In one embodiment, the first magnetic part 611 is arranged below the magnet in the axial direction to generate an axial downward magnetic attraction. The second magnetic part 612 is arranged in at least one movement direction of the mover 30, so that the second magnetic part 612 is located on at least one side of the magnet in the circumferential direction.

[0100] In the axial direction, the stator 20 is located below the mover 30, and under the action of the downward magnetic attraction, the mover 30 is attracted to the stator 20. The ball 41 is arranged between the mover 30 and the stator 20, and is suitable for being clamped by the mover 30 and the stator 20 under the influence of the magnetic attraction, so as to prevent the ball 41 from being separated from the stator 20 and the mover 30, thereby improving the movement reliability.

[0101] The mover 30 moves around the axis to adjust the aperture size, changing the size of the light hole 500. The magnet moves with the movement of the mover 30, so that the distance between the magnet and the second magnetic part 612 changes with the adjustment of the aperture size. The second magnetic part 612 is arranged on the circumference of the magnet, and the second magnetic part 612 and the magnet will only generate a force when the distance between them is small enough.

[0102] When the aperture size is adjusted to at least one limit state, the distance between the magnet and the second magnetic part 612 reaches the threshold, and the second magnetic part 612 generates a magnetic attraction force on the magnet to form a self-locking force. Through the self-locking force, the magnet and the second magnetic part 612 are locked to each other, keeping the distance between the magnet and the second magnetic part 612 unchanged, so that the corresponding mover 30 and stator 20 are locked to maintain stability, avoiding random movement of the mover 30, and causing random movement of the adjustment member 51, such as opening and closing, shaking, etc.

[0103] When the distance between the second magnetic part 612 and the magnet exceeds a threshold value, no magnetic attraction will be generated or the magnetic attraction will be very small, so that during the aperture size adjustment process, the second magnetic part 612 will not generate a certain magnetic attraction on the magnet and interfere with the aperture size adjustment, affecting the movement speed of the actuator 30 and the power consumption of the driving component 40.

[0104] That is, during the movement of the mover 30 for adjusting the aperture size, there is no interaction between the second magnetic part 612 and the magnet, which interferes with the movement of the mover 30, until the mover 30 reaches at least one limit state of the movement range, and the distance between the second magnetic part 612 and the magnet enables the two to interact with each other.

[0105] In some examples, at least one second magnetic portion 612 is disposed on at least one side of at least one magnet along a movement direction so that when the movement stroke in at least one movement direction reaches a limit state, the second magnetic portion 612 generates a magnetic attraction force on the magnet.

[0106] In some examples, at least two second magnetic portions 612 are arranged on both sides of at least one magnet along two movement directions. When the movement stroke in one movement direction reaches the limit state, at least one second magnetic portion 612 on one side generates a magnetic attraction force on the magnet. When the movement stroke in the other movement direction reaches the limit state, at least one second magnetic portion 612 on the other side generates a magnetic attraction force on the magnet.

[0107] Among them, a second magnetic part 612 is set in the movement direction of reducing the aperture, and when the aperture size is adjusted to the minimum, the second magnetic part 612 generates a magnetic attraction force on the magnet to lock the magnet, so that when the variable aperture device is in the minimum aperture state, the mover 30 is locked to the stator 20 and remains relatively stable; the second magnetic part 612 is set in the movement direction of expanding the aperture, and when the aperture size is adjusted to the maximum, the second magnetic part 612 generates a magnetic attraction force on the magnet to lock the magnet, so that when the variable aperture device is in the maximum aperture state, the mover 30 is locked to the stator 20 and remains relatively stable.

[0108] The movement stroke is the movement distance generated by the movement of the mover 30 around the axis during the aperture size adjustment process, and the movement direction is the rotation direction of the mover 30 around the axis, including counterclockwise rotation and clockwise rotation.

[0109] The first ball movable portion 24 provided on the stator 20 , the second ball movable portion 36 provided on the mover 30 , the length of the first hole 501 of the adjusting member 51 , and the like affect the limit state of the movement stroke of the mover 30 .

[0110] One of the magnet and the second magnetic part 612 remains in a stationary state relative to the stator 20, and the other is in a moving state relative to the stator 20, that is, it moves with the axial movement of the mover 30, so that the relative position relationship between the magnet and the second magnetic part 612 changes with the adjustment of the aperture size, and the distance between the two changes. When the distance reaches the threshold, the magnet and the second magnetic part 612 interact with each other to generate magnetic attraction, forming a self-locking, so that the magnet and the second magnetic part 612 remain relatively stable, and then the mover 30 and the stator 20 are locked, so as to avoid random movement of the mover 30 and random movement of the adjusting member 51, such as opening and closing, shaking, and also avoid abnormal noise caused by random movement.

[0111] The installation positions of the magnet and the second magnetic part 612 are adjacent to each other along the moving direction, so that when the mover 30 moves, the distance between them can be adjusted to generate magnetic attraction between the magnet and the second magnetic part 612 .

[0112] Optionally, the magnet is arranged on the stator 20 to remain stationary relative to the stator 20, and the second magnetic part 612 is installed on the mover 30 to move with the mover 30; optionally, the magnet is arranged on the mover 30 to move with the mover 30, and the second magnetic part 612 is installed on the stator 20 to remain stationary relative to the stator 20.

[0113] Further optionally, the second magnetic portion 612 is assembled to the stator 20 and is located on the outer surface of the stator 20 ; optionally, the second magnetic portion 612 is built into the stator 20 and is located inside the stator 20 .

[0114] The variable aperture device includes a plurality of magnets. The aforementioned embodiment has provided a driving magnet 42 driven in the form of a voice coil motor. It may also include a balancing magnet 45. The balancing magnet 45 is suitable for interacting with other magnets of the camera module to balance the magnetic field. The camera module includes a variable aperture device and an optical lens. The variable aperture device is installed on the optical lens to adjust the amount of light entering the optical lens. The optical lens has an automatic focusing function and / or an optical image stabilization function. The automatic focusing function and / or the optical image stabilization function are configured with corresponding magnets, which are usually larger than the driving magnet 42 of the variable aperture device. The balancing magnet 45 is configured to balance the magnetic field of the magnet of the optical lens to avoid mutual interference between the driving magnet 42 and the magnet of the optical lens.

[0115] The magnet of the variable aperture device may also include a position sensing magnet. Correspondingly, the driving component may include a sensor and / or a driving chip that realizes the position sensing function to sense the position change of the mover.

[0116] The second magnetic portion 612 can be arranged on at least one magnet or at least one side of at least one magnet among the aforementioned multiple magnets along the direction of movement. The aforementioned multiple magnets can be arranged separately to realize their respective functions, or they can be shared to realize multiple functions. For example, the driving magnet 42 can be shared with the position sensing magnet to realize the driving function and the position sensing function; the position sensing magnet and the balancing magnet 45 can be shared to realize the position sensing function and the balancing function.

[0117] Specifically, combined 7A to 8B , the magnet is installed on the mover 30, and the second magnetic part 612 is arranged on the side of the balance magnet 45. At least two groups of driving magnets 42 and at least two groups of balancing magnets 45 are symmetrically arranged on the mover 30 around the optical axis L, and the second magnetic part 612 is arranged on the side of the balance magnet 45. Correspondingly, at least two coils 43 are symmetrically installed on the outside of the driving magnet 42 around the optical axis L.

[0118] The magnetic element 61 is built into the stator 20 to reduce the number of parts and facilitate positioning and assembly. Correspondingly, the magnet is installed on the mover 30.

[0119] Specifically, the first magnetic portion 611 is located inside the bottom wall 22, and the second magnetic portion 612 is located inside the inner peripheral wall 21. The inner peripheral wall 21 is provided with a magnetic protrusion 212, which is formed by radially protruding outwardly extending from the outer surface 211 of the inner peripheral wall 21 toward the outside, so as to provide an installation position for the second magnetic portion 612. The second magnetic portion 612 is built into the inner peripheral wall 21, and is at least partially located inside the magnetic protrusion 212, so as to at least partially protrude relative to the rest of the inner peripheral wall 21.

[0120] The outer side of the inner peripheral wall 21 forms a movement space 210 for installing the mover 30 and for the mover 30 to move. The magnet protrusion 212 is protrudingly formed in the movement space 210 and is located in the movement direction of the mover 30.

[0121] The mover 30 is provided with a magnet mounting portion. After the mover 30 is assembled to the stator 20, the mover 30 is arranged as a whole along the direction of movement. The magnetic protrusion 212 is located on one side of the circumference of the magnet mounting portion, so that the magnet mounted on the magnet mounting portion and the second magnetic portion 612 built into the magnetic protrusion 212 are adjacent to each other along the direction of movement. Among them, the mover 30 is provided with a magnet mounting groove 3303 for mounting a balancing magnet 45.

[0122] The balancing magnet 45 and the second magnetic part 612 are adjacent to each other along the movement direction. The adjacent distance is suitable for when the mover 30 adjusts the aperture size, the second magnetic part 612 does not generate magnetic attraction force on the balancing magnet 45 or the generated magnetic attraction force is very small and insufficient to affect the aperture adjustment movement, and when the mover 30 moves to the maximum aperture, the second magnetic part 612 generates magnetic attraction force on the balancing magnet 45 and is sufficient to lock the mover 30 to the stator 20.

[0123] exist Figure 3A In the example shown, the magnetic protrusion 212 and the first ball movable portion 24 are adjacent to each other, and may be implemented as an integral extension protruding from the outer surface 211 away from the optical axis L.

[0124] The position of the magnetic protrusion 212 is specifically designed to match the position of the magnet to meet the requirement that the second magnetic portion 612 and the magnet are adjacent to each other in the moving direction.

[0125] Fig. 7A and Figure 7B The variable aperture device is shown in a schematic diagram when the aperture is at the minimum state, that is, the light hole 500 is adjusted to the minimum. At this time, the movement stroke of the variable aperture device in the movement direction of reducing the aperture is at a limit state, and the rotation amount of the mover 30 in the movement direction of reducing the aperture reaches a maximum.

[0126] The first positioning column 25 of the stator 20 is located closer to the outside of the first hole 501 , and the light hole 500 defined by the stacked second portions 512 is in the smallest state. One circumferential end of the first ball movable portion 24 is abutted against one circumferential end of the second ball movable portion 36 .

[0127] Fig. 8A and Figure 8B The variable aperture device is shown in the maximum aperture state, that is, the light hole 500 is adjusted to the maximum. At this time, the movement stroke of the variable aperture device in the movement direction of the enlarged aperture is at the limit state, and the rotation amount of the mover 30 in the movement direction of the enlarged aperture reaches the maximum.

[0128] The first positioning column 25 of the stator 20 is located on the side of the first hole 501 closer to the second portion 512. The light hole 500 defined by the stacked second portions 512 is in the largest state. The other circumferential end of the first ball movable portion 24 is abutted against the other circumferential end of the second ball movable portion 36.

[0129] When the distance between the second magnetic part 612 and the magnet arranged in the movement direction of the enlarged aperture reaches a threshold value, the second magnetic part 612 generates a magnetic attraction force on the balancing magnet 45 to attract the balancing magnet 45 to the second magnetic part 612, lock the balancing magnet 45, and thereby maintain the relative stability of the mover 30 and the stator 20, so that the light hole 500 can be maintained in the maximum state, and the adjustment member 51 will not move randomly to affect the state of the light hole 500.

[0130] Next, combine Figure 2 , Figure 5 , Figure 6 , Figures 9 to 10B Other structures of the magnetic assembly 60 are described.

[0131] In some examples, a first magnetic portion 611 of the magnetic attraction element 61 is integrally arranged in the axial direction of all magnets to generate an axial magnetic attraction force with the magnets; in some examples, refer to Figure 5 , the multiple first magnetic parts 611 of the multiple magnetic attraction elements 61 are respectively arranged around the optical axis L in a plane perpendicular to the optical axis, and each first magnetic part 611 is located in the axial direction of each corresponding magnet or each magnet group, so that each first magnetic part 611 and each corresponding magnet generate an axial magnetic attraction force. Among them, the magnet group can be a magnet group formed by two or more magnets arranged adjacently, the distance between the magnets in the magnet group is small, and there is a certain distance between each magnet group.

[0132] In such Figure 6In some examples shown, the magnetic assembly 60 includes at least two magnetic elements 61A and at least two magnetic elements 61B that are separately disposed, and the magnetic elements 61A and 61B are adjacently disposed around the optical axis L. Each magnetic element 61A is symmetrical around the optical axis L, and each magnetic element 61B is symmetrical around the optical axis L.

[0133] The magnetic attraction elements 61A and 61B both include a first magnetic portion 611. Multiple first magnetic portions 611 extend in the same plane perpendicular to the optical axis L and are located axially downward of the balancing magnet 45 and the driving magnet 42, respectively, to generate a downward magnetic attraction force on the balancing magnet 45 and the driving magnet 42.

[0134] The first magnetic portion 611 and the second magnetic portion 612 of the magnetic attraction element 61A are integrally formed, and the second magnetic portion 612 is integrally bent relative to the first magnetic portion 611 .

[0135] In addition, in coordination with the symmetrical arrangement of the driving magnets 42 around the optical axis L, the first magnetic portions 611 are symmetrically arranged around the optical axis L.

[0136] The magnets are symmetrically arranged around the optical axis L, and at least two second magnetic parts 612 are symmetrically arranged around the optical axis L, so that the locking stability of the mover 30 is stronger.

[0137] Further, the magnetic attraction element 61 includes a third magnetic portion 613 , which connects the first magnetic portion 611 and the second magnetic portion 612 , and extends in a plane perpendicular to the optical axis L. The third magnetic portion 613 is U-shaped in a plane perpendicular to the optical axis.

[0138] Furthermore, the magnetic element 61 further includes a fourth magnetic portion 613, which extends in a plane perpendicular to the optical axis L. The fourth magnetic portion 613 extends from the first magnetic portion 611 to the outside of the stator 20, as shown in FIG. Fig. 9 As shown, an end portion of the fourth magnetic portion 613 is exposed outside the stator 20 and protrudes relative to the outer peripheral edge 222 .

[0139] When the shell 10 is installed on the stator 20, the exposed fourth magnetic part 614 is suitable for contacting the shell 10, and the fourth magnetic part 614 is made of metal. The fourth magnetic part 614 can be fixed to the shell 10 through a welding process, so that the stator 20 and the shell 10 are fixed by welding to enhance the connection strength.

[0140] According to another aspect of the present application, referring to Figures 9 to 10B The magnetic assembly 60 is configured as a two-layer structure, including a magnetic attraction element 61 and a magnetic conductive element 62, which are stacked in a direction parallel to the optical axis L. The magnetic conductive element 62 is disposed in a direction parallel to the optical axis L below the magnetic attraction element 61.

[0141] The magnetic conductive element 62 extends in a plane perpendicular to the optical axis L. The magnetic conductive element 62 is suitable for being arranged in the axial direction of the magnet and generating an axial magnetic attraction force with the magnet.

[0142] The magnetic element 61 is closer to the magnet of the variable aperture device than the magnetic element 62 to generate interaction force with the magnet of the variable aperture device. The magnetic element 62 is closer to the bottom of the variable aperture device than the magnetic element 61. When the variable aperture device is installed on the optical lens, the magnetic element 62 is closer to the magnet of the optical lens to interact with the magnet of the optical lens.

[0143] The magnetic attraction element 61 is used to guide the magnetic lines of force generated by the magnet of the variable aperture device, and the magnetic conductive element 62 is used to guide the magnetic lines of force generated by the magnet of the aperture lens to avoid mutual interference between the magnetic fields of the variable aperture device and the aperture lens.

[0144] It is understandable that the magnet of the optical lens can be a magnet for the autofocus function, a magnet for the optical image stabilization function, or a magnet shared by both.

[0145] There may be one or more magnetic conductive elements 62 . One magnetic conductive element 62 is integrally formed and located axially below the first magnetic portion 611 . Multiple magnetic conductive elements 62 are integrally formed and symmetrically arranged around the optical axis L axially below the first magnetic portion 611 .

[0146] Reference Fig. 9 , combined with Figure 5 In accordance with the design of the recessed installation space 230, the driving magnet 42 is arranged closer to the optical axis L. Correspondingly, the first magnetic portion 611 of the magnetic element 61B located below the driving magnet 42 is closer to the optical axis L.

[0147] Further, refer to Fig. 10A The magnetic conductive element 62 includes an integrally formed first portion 621 and a second portion 622. In accordance with the design of the recessed installation space 230, the first portion 621 is disposed inside the location of the installation space 230, closer to the optical axis L. The first portion 621 and the first magnetic portion 611 are located together below the driving magnet 42 in the axial direction. The second portion 622 is closer to the outer peripheral edge 222 of the stator 20 than the first portion 621, and further away from the optical axis L. The connection between the first portion 621 and the second portion 622 forms a bent connection.

[0148] like Figure 5As shown in the figure, a plurality of magnetic elements 61A and 61B are arranged around the optical axis, the magnetic conductive element 62 is arranged below the magnetic element 61B in the axial direction, the first portion 621 fits the first magnetic portion 611, and the second portion 622 is located below the axial direction of the gap between the adjacent magnetic elements 61A and 61B. The magnetic elements 61A and 61B and the magnetic conductive element 62 are arranged around the optical axis L and form a two-layer stacked structure in the axial direction.

[0149] In addition, the magnetic conductive element 62 can be configured to be built into the stator 20, and can also be assembled to the stator 20 to be formed axially below the magnetic element 61. In some examples, the circuit board 44 is implemented to be installed at the bottom of the stator 20, and the magnetic conductive element 62 can be implemented to be installed on the circuit board 44.

[0150] In addition, the magnetic assembly 60 may further include a magnetizing member 63, which is disposed adjacent to the driving magnet 42 to enhance the magnetic field of the driving magnet 42. When the driving magnet 42 is mounted on the mover 30, the magnetizing member 63 may be built into the mover 30 to be close to the driving magnet 42, and the assembly step is eliminated.

[0151] According to another aspect of the present application, Combination Figure 2 , Figure 3B , Figure 5 , Fig. 7A and Figure 7B The magnet of the present application is composed of two square magnets placed at an angle to replace the traditional arc-shaped magnet, which can improve the shape accuracy, reduce the manufacturing difficulty, improve the tolerance accuracy, and reduce the thrust difference and instability problems between different batches.

[0152] Specifically, taking the driving magnet 42 as an example, the driving magnet 42 includes a first driving magnet 421 and a second driving magnet 422. The first driving magnet 421 and the second driving magnet 422 are both square magnets with straight edges in the cross section. The first driving magnet 421 and the second driving magnet 422 are installed at an angle. An angle is formed between the two inner surfaces of the first driving magnet 421 and the second driving magnet 421 facing the optical axis L. The two inner surfaces are arranged at an angle to imitate an arc surface. Another angle is formed between the two outer surfaces of the first driving magnet 421 and the second driving magnet 422 facing the opposite direction of the optical axis L, and the two outer surfaces are arranged at an angle to imitate an arc surface. The outer surface and the inner surface of each driving magnet are parallel to each other, and the sum of the above two angles is 360°.

[0153] Similarly, the balancing magnet 45 includes a first balancing magnet 451 and a second balancing magnet 452, both of which are square magnets installed in an angular arrangement to replace a single arc magnet. Other magnets of the variable aperture device can also be modified to be in an angular arrangement with two square magnets, such as a position sensing magnet.

[0154] According to another aspect of the present application, Reference Fig.11A and Fig. 11B Indication, combined Figure 3A and Figure 3B By improving the design of the ball moving part, the gap in the movable space of the ball is filled to improve or avoid the problem of random shaking of the adjusting member 51.

[0155] The stator 20 and the mover 30 are correspondingly provided with at least two groups of ball grooves, and the at least two groups of ball grooves are respectively located on opposite sides of the optical axis L, wherein the inner wall surface of at least one ball groove located on one side of the optical axis L is extended in a direction inclined at a certain angle relative to the optical axis L, and abuts against the ball 41, and the inner wall surface of at least one ball groove located on the other side of the optical axis L extends in directions parallel to the optical axis L and perpendicular to the optical axis L.

[0156] The stator 20 is provided with at least two first ball movable parts 24 symmetrical around the optical axis L, and the first ball movable part 24 has at least one first axial surface 2401, at least one first radial surface 2402 and at least two first circumferential surfaces 2403. The first axial surface 2401, the second radial surface 2402 and the first axial surface 2403 form an inner wall surface, defining a first ball groove 240 suitable for the movement of the ball 41.

[0157] The first ball movable portion 24 includes at least two circumferential side walls 241, which extend radially away from the optical axis L from the outer surface of the inner circumferential wall 21. The first ball groove 240 is defined between the at least two circumferential side walls 241, and the circumferential distance, i.e., the length, of the first ball groove 240 is limited.

[0158] The first ball movable portion 24 includes at least one radial side wall 242, which is formed at the outer end of at least two circumferential side walls 241 and extends axially from the bottom wall 22. The radial side wall 242 and the inner circumferential wall 21 define the first ball groove 240 and limit the radial distance, i.e., the width, of the first ball movable portion 240.

[0159] The circumferential sidewall 241 , the inner circumferential wall 21 , the bottom wall 22 and the radial sidewall 242 form a first ball groove 240 . The first ball groove 240 is defined together, and the radial and circumferential spaces of the first ball groove 240 are both limited, so that the ball 41 can be directly assembled to the stator 20 .

[0160] Among them, the surface of the bottom wall 22 facing the first ball groove 240 forms a first axial surface 2401, and the surface of the inner wall 21 facing the first ball groove 240 forms a first radial surface 2402. The first axial surface 2401 and the first radial surface 2402 define the axial cross-sectional shape of the first ball groove 240 as L-shaped.

[0161] The mover 30 is provided with at least one first side ball groove 3610 and at least one second side ball groove 3620 symmetrically distributed around the optical axis L.

[0162] The first side ball groove 3610 is formed by the inner circumference 31 of the automatic roller 30 extending radially and axially in a direction away from the optical axis L. The first side ball groove 3610 has at least a first side axial surface 3611 , at least a first side radial surface 3612 and at least two first side circumferential surfaces 3613 .

[0163] The first side axial surface 3611 is formed by extending radially from the surface of the inner peripheral portion 31 in a direction away from the optical axis L. The first side axial surface 3611 and the bottom surface of the bottom portion 34 have an axial height difference to define the axial distance, i.e., the height, of the first side ball groove 3610. The first side radial surface 3612 is formed by extending axially from the surface of the bottom portion 34 of the bottom portion 34. The first side radial surface 3612 and the surface of the inner peripheral portion 31 have a radial distance difference to define the radial distance, i.e., the width, of the first side ball groove 3610. At least two first side circumferential surfaces 3613 are formed at both ends of the first side axial surface 3611 and the first side radial surface 3612 and extend to the surface of the bottom portion 34 and the surface of the inner peripheral portion 31. The circumferential distance, i.e., the length, of the first side ball groove 3610 is defined between the at least two first side circumferential surfaces 3613.

[0164] The axial cross-sectional shape of the first side ball groove 3610 is defined by a first side axial surface 3611 and a second side radial surface 3612, and the first side axial surface 3611 and the second side radial surface 3612 are perpendicular to each other, so that the axial cross-sectional shape of the first side ball groove 3610 is formed into an L-shape.

[0165] The second side ball groove 3620 is formed by the inner circumference 31 of the automatic roller 30 extending radially and axially in a direction away from the optical axis L. The second side ball groove 3620 has at least one second side axial surface 3621, at least one second side inclined surface 3622, at least one second side radial surface 3623 and at least two second side circumferential surfaces 3624.

[0166] The second side axial surface 3621 automatically extends from the inner circumference 31 of the sub-30 radially away from the optical axis L, and the second side axial surface 3621 and the surface of the bottom 34 have a height difference to define the axial distance, i.e., the height, of the second side ball groove 3620; the second side inclined surface 3622 is formed by extending from the second side axial surface 3621 obliquely toward the surface direction of the bottom 34 relative to the optical axis L, and the second side inclined surface 3622 faces the optical axis L; the second side radial surface 3623 axially extends from the second side inclined surface 3622 to the surface of the bottom 34, and there is a radial distance difference between the second side radial surface 3623 and the surface of the inner circumference 31, which limits the radial distance, i.e., the width, of the second side ball groove 3620; at least two second side circumferential surfaces 3624 are formed at both ends of the second side axial surface 3621, the second side inclined surface 3622 and the second side radial surface 3623, and the circumferential distance, i.e., the length, of the second side ball groove 3620 is defined between at least two second side circumferential surfaces 3624.

[0167] That is, the second side ball groove 3620 has an inclined surface, so that the axial cross-sectional shape of the second side ball groove 3620 has at least one oblique side.

[0168] The first ball groove 240 and the first side ball groove 3610 on one side of the optical axis L cooperate with each other, and the first movable space 4101 is defined by the inner wall surfaces of the first ball groove 240 and the first side ball groove 3610. Since the axial cross-sectional shapes of the first ball groove 240 and the first side ball groove 3610 are both L-shaped, the axial cross-sectional shapes of the first movable space 4101 are all straight edges. The contact force points of the ball 41 located in the first movable space 4101 and the components of the stator 20 and the mover 30 are located in the axial direction and in the direction perpendicular to the axial direction. The ball 41 is not subjected to oblique force, and no new component force in the same direction will be generated due to the oblique force.

[0169] The first ball groove 240 and the second side ball groove 3620 on the other side of the optical axis L cooperate with each other, and the second movable space 4102 is defined by the inner wall surfaces of the first ball groove 240 and the second side ball groove 3620. Since the axial cross-sectional shape of the second side ball groove 3620 has at least one oblique side, the axial cross-sectional shape of the second movable space 4102 has at least one oblique side.

[0170] The ball 41 in the second movable space 4102 contacts the components of the stator 20 and the mover 30 to generate at least one oblique force point G. The second side inclined surface 3622 faces the optical axis L, and the oblique force point G is located on the side of the ball 41 opposite to the optical axis L.

[0171] When the stator 20 and the mover 30 assembly generates an axial force F, such as a downward axial force F, the downward pressure F at the oblique force point G is decomposed into an axial component force RAX and a driving force RAY perpendicular to the axial direction. The axial component force RAX is directed from the stator 20 toward the mover 30, suitable for supporting the mover 30, and the driving force RAY causes the mover 30 to move from the first movable space 4101 to the second movable space 4102. The gap in the first movable space 4101 is compensated by the movement of the mover 30, and the ball 41 located therein is clamped by the mover 30 and the stator 20. Since the axial cross-section of the first movable space 4101 is square, the ball 41 is not subjected to oblique force. After being clamped, it will not move in a direction perpendicular to the axial direction. The mover 30 and the stator 20 remain relatively stable, avoiding random movement of the mover 30 relative to the stator 20.

[0172] Reference Fig.12 , combined with Figure 3A and Fig. 9 As shown in the figure, the housing 10 and the stator 20 are adaptively designed with concave and convex structures to increase the adhesive area at the connection between the housing 10 and the stator 20 and enhance the connection strength between the housing 10 and the stator 20.

[0173] Specifically, the bottom wall 22 of the stator 20 includes a boss 223 , which extends from the outer peripheral edge 222 of the bottom wall 22 in a direction away from the optical axis L and in a direction perpendicular to the optical axis, so as to be protrudingly formed on the outer peripheral edge 222 of the bottom wall 22 .

[0174] The bottom end of the outer peripheral wall 12 of the outer shell 10 has a high and low design, and is arranged as a recessed portion 1201 and a protruding portion 1202. The recessed portion 1201 and the protruding portion 1202 are arranged adjacent to each other. The outer shell 10 is installed on the stator 20, and the boss 220 is located axially below the recessed portion 1201. The protruding portion 1202 is located on the outer periphery of the bottom wall 22 perpendicular to the direction of the optical axis L, that is, on the radial outer side, facing the outer peripheral edge 222.

[0175] Gluing is performed between the boss 223 and the surface of the recessed portion 1201 , and between the protruding portion 1202 and the surface of the outer peripheral edge 222 , so as to increase the gluing area and enhance the connection strength between the housing 10 and the stator 20 .

[0176] The fourth magnetic part 614 is exposed at the outer peripheral edge 222 of the stator 20 and is located at the recessed part 1201. The fourth magnetic part 614 and the housing 10 are welded to be fixedly connected, so that the connection between the stator 20 and the housing 10 is welded in addition to gluing, further strengthening the connection strength and improving the pulling force.

[0177] In addition, refer to Fig.12As shown in FIG. 2 , the inner surface 213 formed by the inner peripheral wall 21 around the optical axis L defines a receiving space 200 for the optical lens to lean against, and the end of the optical lens is accommodated in the receiving space 200, so that the variable aperture device is installed on the optical lens to form a camera module. The variable aperture device is suitable for adjusting the amount of light entering the camera module. The bottom surface 224 of the bottom wall 22 forms the bottom surface of the variable aperture device, and has a high degree of flatness.

[0178] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A variable aperture device, characterized in that: include: At least one stator, at least one mover and at least one housing, wherein the mover is movably mounted on the stator and the housing is mounted on the stator; At least one driving assembly is used to drive the mover to move around the axis relative to the stator; as well as A plurality of adjusting members, each of which defines at least one light-through hole, and is adjustably mounted on the stator and the mover. As the mover moves relative to the stator, the relative position of the adjusting member changes, thereby defining the size of the light-through hole; Wherein, the mover is installed on the outer side of the inner peripheral wall of the stator, and is located between the stator and the housing in a direction perpendicular to the optical axis; Each of the adjusting members is rotatably connected to the mover and slidably connected to the stator.

2. The variable aperture device according to claim 1, wherein: The stator is provided with a first positioning post, and the mover is provided with a second positioning post. The first positioning post is closer to the optical axis of the variable aperture device than the second positioning post. The adjusting member rotates around the second positioning post and slides relative to the first positioning post.

3. The variable aperture device according to claim 1, wherein: The stator is provided with a first drive mounting portion, which is located on the side of the stator opposite to the inner circumferential wall. The mover is provided with a second drive mounting portion, which is provided with an avoidance groove. After the mover is assembled on the stator, the first drive mounting portion is located in the avoidance groove.

4. The variable aperture device according to claim 3, wherein: The driving component includes a driving magnet and a driving coil. The driving magnet is installed on the second driving mounting part, and the driving coil is installed on the first driving mounting part. The driving magnet and the driving coil are adjacent to each other in a direction perpendicular to the optical axis and interact with each other to drive the mover to move around the axis relative to the stator.

5. The variable aperture device according to claim 4, wherein: The second drive mounting portion is provided with a mounting groove, the mounting groove is closer to the optical axis than the avoidance groove, and the drive magnet is mounted in the mounting groove.

6. The variable aperture device according to claim 4, wherein: The first drive mounting portion includes a first mounting wall and a second mounting wall, and the first mounting wall and the second mounting wall are extended from the outer periphery of the bottom wall of the stator in a direction parallel to the optical axis at intervals, and a mounting space is defined between the first mounting wall and the second mounting wall for mounting the drive coil, wherein the mounting space passes through the bottom wall, and the drive coil is located on the inner side of the outer periphery of the bottom wall of the stator after being mounted in the mounting space.

7. The variable aperture device according to claim 6, wherein: The driving component includes a circuit board, which includes an annular portion and an axial portion. The annular portion is located between the bottom wall of the stator and the bottom of the mover. The axial portion is bent relative to the annular portion and extends in a direction parallel to the optical axis. The axial portion is installed in the space and connected to the driving coil circuit.

8. The variable aperture device according to claim 1, wherein: The outer peripheral edge of the bottom wall is provided with spaced bosses, and the end of the outer peripheral wall is provided with staggered recesses and protrusions, the bosses are located axially below the recesses, and the protrusions are located outside the outer peripheral edge.

9. The variable aperture device according to claim 1, wherein: The variable aperture device also includes at least one interacting magnet and at least one magnetic attraction element, the magnetic attraction element includes at least one first magnetic part and at least one second magnetic part that are integrally formed, the first magnetic part is arranged on at least one side of the magnet parallel to the optical axis direction, and the second magnetic part is arranged on at least one side of the magnet along at least one movement direction, when the mover moves along the movement direction to the second magnetic part to generate magnetic attraction force on the magnet, the mover is locked relative to the stator. 10 . The variable aperture device according to claim 9 , wherein the first magnetic portion extends in a direction perpendicular to the optical axis, the second magnetic portion extends in a direction parallel to the optical axis, and the second magnetic portion is formed by being bent integrally with the first magnetic portion.

11. The variable aperture device according to claim 10, wherein: When the mover moves along at least one of the movement directions until the light-through hole reaches at least one limit state, the second magnetic part generates a magnetic attraction force on the magnet.

12. The variable aperture device according to claim 9, wherein: The magnetic attraction element is built into the stator, the first magnetic part is built into the bottom wall and is located axially below the mover, the stator includes a magnetic protrusion, and the magnetic protrusion extends protrudingly from the outer surface of the inner circumferential wall of the stator, and the second magnetic part is built into the magnetic protrusion to be located in the movement direction of the mover.

13. The variable aperture device according to claim 12, wherein: The variable aperture device further comprises a ball, a movable space for the ball to move is defined between the stator and the mover, and at least one ball located in at least one of the movable spaces is abutted against at least one inclined surface.

14. A camera module, characterized in that: include: Optical lens; and According to any one of claims 1 to 13, the variable aperture device is installed on the optical lens to adjust the amount of light entering the camera module.

15. The camera module according to claim 14, wherein: The variable aperture device further comprises at least one magnetic conductive element, wherein the magnetic conductive element and the magnetic attraction element are arranged in a direction parallel to the optical axis, and the magnetic conductive element is arranged below the magnetic attraction element in the axial direction and close to the bottom of the variable aperture device. The magnetic conductive element interacts with the magnet of the optical lens, and the magnetic attraction element interacts with the magnet of the variable aperture device.

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