Variable aperture, camera module, and electronic device

Abstract

The application provides a variable aperture, a camera module and an electronic device. The variable aperture comprises a fixed seat, a rotating support, a mover, a stator and a plurality of blades. By arranging the rotating support on the inner side of the fixed seat, on the one hand, the rotating support will not interfere with the components on the outer side of the fixed seat, ensuring the accuracy of the rotation angle of the rotating support during rotation, and on the other hand, the components on the outer side of the fixed seat can be arranged closely to the fixed seat, so that the components are arranged more compactly, thereby facilitating the miniaturization of the variable aperture. In addition, by fixedly connecting the mover to the outer circumferential side of the rotating support and arranging the stator to face the mover, on the one hand, the mover and the stator are prevented from being stacked in the thickness direction of the camera module, and on the other hand, the mover, the stator, the fixed seat and the rotating support can be arranged more compactly.

Description

[0001] This application is a divisional application. The original application has the application number 2021110610846 and the original application date is September 10, 2021. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of camera technology, and more particularly to a variable aperture, camera module, and electronic device. Background Technology

[0003] In recent years, major manufacturers have placed more stringent demands on the imaging quality of camera modules. Imaging quality is improved by adjusting the amount of light entering the variable aperture by changing its aperture opening size. Traditional variable apertures consist of a moving part, a rotating part, and multiple blades. The moving part is connected to the rotating part. When the moving part moves, it pulls the rotating part to rotate, thereby causing the blades to open and close. However, the large movement space of the moving part and the large space it occupies hinder the miniaturization of the variable aperture. Summary of the Invention

[0004] This application provides a variable aperture, camera module, and electronic device that can be miniaturized.

[0005] In a first aspect, embodiments of this application provide a variable aperture. The variable aperture includes a fixed base, a rotating bracket, a mover, a stator, and multiple blades. Both the fixed base and the rotating bracket can be annular. The rotating bracket is located inside the fixed base and is rotatably connected to the fixed base. The rotating bracket encloses a space. The multiple blades can be arranged in a ring. The multiple blades together enclose a light-transmitting aperture. The light-transmitting apertures of the multiple blades communicate with the space. Each blade is rotatably connected to the fixed base and slidably connected to the rotating bracket.

[0006] The mover is fixedly connected to the outer peripheral side of the rotating bracket. The stator is fixedly connected to the fixed base. The stator faces the mover. The mover, in cooperation with the stator, drives the rotating bracket to rotate relative to the fixed base. Each blade slides relative to the rotating bracket and rotates relative to the fixed base, causing the aperture of the light-transmitting holes of multiple blades to change.

[0007] Understandably, when the rotating bracket is located on the outside of the fixed base, a certain amount of space needs to be reserved between the rotating bracket and the components on the outside of the fixed base to avoid interference. This results in a relatively large variable aperture structure, which is detrimental to the miniaturization of the variable aperture. However, in this embodiment, by placing the rotating bracket on the inside of the fixed base, the rotating bracket will not interfere with the components on the outside of the fixed base, and the components on the outside of the fixed base can be set close to the fixed base, thus facilitating the miniaturization of the variable aperture.

[0008] In addition, by setting the rotating bracket inside the fixed base, the rotating bracket will not collide with the outer parts of the fixed base when it rotates relative to the fixed base, thereby ensuring that the size of the light-transmitting holes of multiple blades can be accurately controlled under different conditions.

[0009] In this embodiment, by fixing the mover to the outer peripheral side of the rotating bracket and having the stator face the mover, on the one hand, the mover and stator are prevented from stacking in the thickness direction of the camera module, and on the other hand, the mover, stator, fixed base and rotating bracket can be arranged more compactly, which is beneficial for the miniaturization of the variable aperture.

[0010] In one possible implementation, the rotating bracket is located inside the fixed base, meaning that the projection of the rotating bracket onto the reference plane at least partially coincides with the projection of the fixed base onto the reference plane, and the reference plane is parallel to the optical axis of the variable aperture.

[0011] In one possible implementation, the outer peripheral side of the rotating bracket is parallel to the optical axis of the variable aperture.

[0012] In one possible implementation, the stator-moving plane includes the plane containing the stator and the plane containing the mover, both of which are parallel to the optical axis of the variable aperture.

[0013] In one possible implementation, the mover is a first magnet, and the stator is a first coil. The first coil faces the first magnet. It can be understood that the first coil facing the first magnet can be achieved by both the plane of the first coil and the plane of the first magnet being parallel to the optical axis of the variable aperture, or by the axis of the first coil's winding being perpendicular to the optical axis of the variable aperture, and the plane of the first magnet being parallel to the optical axis of the variable aperture. In this case, the first coil can be arranged vertically. When the first coil is energized, the first magnet experiences a force, causing the rotating support to rotate relative to the fixed base. Each blade slides relative to the rotating support and rotates relative to the fixed base, causing the aperture of the light-transmitting holes of the multiple blades to change.

[0014] In this implementation, by fixing the first magnet to the outer periphery of the rotating bracket and the first coil to the fixed base, when the first coil is energized, the first magnet experiences a force, causing the rotating bracket to rotate relative to the fixed base. It is understood that, on the one hand, the drive device composed of the first magnet and the first coil does not require wires between the rotating bracket and the fixed base, resulting in a simpler and cleaner structure. On the other hand, the first magnet and the first coil do not need to move to rotate the rotating bracket. Thus, the variable aperture does not require additional space for the movement of the first magnet and the first coil. The smaller space occupied by the first magnet and the first coil facilitates the miniaturization of the variable aperture.

[0015] In this embodiment, by fixing the first magnet to the outer peripheral side of the rotating bracket and arranging the first coil facing the first magnet, stacking of the first magnet and the first coil in the thickness direction of the camera module is avoided. Furthermore, the first magnet, the first coil, the mounting base, and the rotating bracket can be arranged more compactly. Moreover, compared to laying the first coil flat on the mounting base, this embodiment, by fixing the first coil vertically to the mounting base, utilizes the space of the rotating bracket in the Z-axis direction and reduces the area occupied by the first coil in the XY plane.

[0016] In one possible implementation, the direction from the south pole of the first magnet to its north pole is parallel to the circumference of the rotating support. In this case, the direction of the Ampere force on the first magnet can be tangent to the axis of the rotating support and parallel to the plane of the rotating support. Most of the Ampere force on the first magnet can be used to drive the rotation of the rotating support. The utilization rate of the Ampere force on the first magnet is high. Furthermore, the first coil facing the first magnet can be positioned relatively vertically, thereby minimizing the space occupied by the first coil in the XY plane.

[0017] In one possible implementation, the outer peripheral side of the rotating bracket is recessed towards the center of the rotating bracket to form a first mounting groove, and at least a portion of the first magnet is fixedly connected within the first mounting groove. In this case, at least a portion of the first magnet can be embedded within the rotating bracket. Thus, at least a portion of the first magnet overlaps with the rotating bracket. The at least a portion of the first magnet does not additionally increase the size of the variable aperture, which is beneficial for miniaturizing the variable aperture.

[0018] In one possible implementation, the variable aperture further includes a second magnet and a second coil. The second magnet is fixedly connected to the outer peripheral side of the rotating bracket. The second coil is fixedly connected to the fixed base. The second coil faces the second magnet. The second coil is used to cause the second magnet to rotate the rotating bracket relative to the fixed base when energized. The direction in which the second magnet rotates the rotating bracket relative to the fixed base is the same as the direction in which the first magnet rotates the rotating bracket relative to the fixed base. It is understood that the second coil facing the second magnet can mean that the plane of the second coil is face-to-face with the second magnet.

[0019] Understandably, by fixing the second magnet to the outer periphery of the rotating bracket and the second coil to the fixed base, the second magnet can drive the rotating bracket to rotate relative to the fixed base when the second coil is energized. On one hand, the drive device composed of the second magnet and the second coil has a relatively simple structure. On the other hand, the second magnet and the second coil do not need to move to pull the rotating bracket to rotate. Thus, the variable aperture does not need to provide additional space for the movement of the second magnet and the second coil. The smaller space occupied by the second magnet and the second coil is beneficial for the miniaturization of the variable aperture.

[0020] In this embodiment, by fixing the second magnet to the outer peripheral side of the rotating bracket and positioning the second coil facing the second magnet, stacking of the second magnet and the second coil in the thickness direction of the camera module is avoided. Furthermore, the second magnet, the second coil, the mounting base, and the rotating bracket can be arranged more compactly. Moreover, compared to laying the second coil flat on the mounting base, this embodiment, by fixing the second coil vertically to the mounting base, utilizes the space of the rotating bracket in the Z-axis direction and reduces the area occupied by the second coil in the XY plane.

[0021] In addition, by cooperating with the first coil, the first magnet, the second coil, and the second magnet, the uniformity of force on the rotating bracket during rotation can be greatly improved, so as to avoid the rotating bracket from shaking or tilting during rotation.

[0022] In one possible implementation, the second magnet is symmetrical to the first magnet about the center of the rotating support. This allows for relatively symmetrical forces acting on the rotating support from the second and first magnets. The rotating support exhibits high stability, meaning it is less prone to wobbling or tilting during rotation.

[0023] In one possible implementation, the outer peripheral side of the rotating bracket is recessed towards the center of the rotating bracket to form a second mounting groove, and at least a portion of the second magnet is fixedly connected within the second mounting groove. In this case, at least a portion of the second magnet can be embedded within the rotating bracket. Thus, at least a portion of the second magnet overlaps with the rotating bracket. The at least portion of the second magnet does not additionally increase the size of the variable aperture, which is beneficial for miniaturizing the variable aperture.

[0024] In one possible implementation, the mounting base has a first through hole and a second through hole spaced apart. Both the first and second through holes form openings on the inner and outer peripheral sides of the mounting base. The variable aperture also includes a flexible circuit board. The flexible circuit board can be annular. The flexible circuit board surrounds the outer peripheral side of the mounting base and is fixedly connected to it.

[0025] The first coil is fixedly connected to the inner peripheral side of the flexible circuit board and is electrically connected to the flexible circuit board. The first coil is located inside the first through hole. The second coil is fixedly connected to the inner peripheral side of the flexible circuit board and is electrically connected to the flexible circuit board. The second coil is located inside the second through hole.

[0026] Understandably, by placing the first coil inside the first through-hole and the second coil inside the second through-hole, the first and second coils overlap with the mounting base in all directions. This allows the first and second coils to utilize the space occupied by the mounting base without increasing the size of the variable aperture, thus facilitating miniaturization of the variable aperture.

[0027] In one possible implementation, the variable aperture also includes a driver chip. The driver chip is fixedly connected to and electrically connected to the flexible circuit board. The driver chip is used to supply power to the first and second coils.

[0028] In one possible implementation, the driver chip, the first coil, and the second coil are connected in series. The sum of the voltages of the first and second coils is greater than one-sixth of the supply voltage of the driver chip. This allows the first and second coils to receive a larger voltage, thereby reducing the power consumption of the driver chip and consequently reducing its heat generation. Consequently, the heat generated by the driver chip is less likely to affect peripheral devices (such as lens assemblies).

[0029] In one possible implementation, the resistance of the second coil is greater than that of the first coil. This allows the second coil to receive a larger voltage. Because the second coil is located further away from the driver chip, the heat generated by the second coil is less likely to increase the temperature of the area where the driver chip is located.

[0030] In one possible implementation, the variable aperture also includes an auxiliary resistor. The auxiliary resistor is fixedly connected to and electrically connected to the flexible circuit board. The driver chip, the first coil, the second coil, and the auxiliary resistor are connected in series. It is understood that by connecting an auxiliary resistor in series in the driver chip's circuitry, the auxiliary resistor can act as a voltage divider when the driver chip provides current signals to the first and second coils, thereby reducing the power consumption of the driver chip and consequently reducing its heat generation. In this way, the heat generated by the driver chip is less likely to affect peripheral devices (such as lens assemblies).

[0031] In one possible implementation, the auxiliary resistor is located within the area enclosed by the second coil. This allows for a more compact arrangement of the auxiliary resistor, the second coil, and the flexible circuit board, which is beneficial for miniaturizing the variable aperture.

[0032] In one possible implementation, the driver chip is located within the area enclosed by the first coil. The driver chip also detects the magnetic field strength of the first magnet at different positions. This dual-purpose function of the driver chip facilitates the miniaturization of the variable aperture.

[0033] In one possible implementation, the variable aperture further includes a first magnetic plate and a second magnetic plate. The first and second magnetic plates are fixedly connected to the mounting base at a distance. The first magnetic plate is located around the periphery of the first magnet. The second magnetic plate is located around the periphery of the second magnet.

[0034] In one possible implementation, the fixed base has multiple spaced-apart rotating columns. The rotating support has multiple spaced-apart guide columns. Each blade has spaced-apart rotating holes and guide holes. The multiple rotating columns are rotatably connected to the rotating holes of the multiple blades in a one-to-one correspondence. The multiple guide columns are slidably connected to the guide holes of the multiple blades in a one-to-one correspondence.

[0035] In one possible implementation, the blade also has a first auxiliary hole. The first auxiliary hole is spaced apart from the guide hole and the rotating hole, and is located around the guide hole. It is understood that when the guide post is positioned within the guide hole, the portion between the guide hole and the first auxiliary hole has a certain degree of elasticity. This portion can deform to provide sufficient assembly space for the guide post, thereby reducing the assembly difficulty between the guide post and the guide hole. Furthermore, when the guide post is positioned within the guide hole, the portion between the guide hole and the first auxiliary hole can deform to compress the guide post, allowing for an interference fit between the guide post and the guide hole, i.e., a zero-clearance fit. Thus, during the opening and closing of the blade, the guide post will not wobble due to any gap between it and the guide hole. In this case, the aperture size of the light-transmitting holes 650 of the multiple blades is more controllable and has higher precision.

[0036] In one possible implementation, the blade is also provided with a second auxiliary hole. The second auxiliary hole is spaced apart from the guide hole and the rotation hole, and is located around the rotation hole.

[0037] Understandably, when the rotating column is positioned within the rotating hole, the portion between the rotating hole and the second auxiliary hole possesses a certain degree of elasticity. This elasticity allows the portion between the rotating hole and the second auxiliary hole to deform, providing sufficient assembly space for the rotating column and reducing the assembly difficulty. Furthermore, after the rotating column is positioned within the rotating hole, the portion between the rotating hole and the second auxiliary hole can deform and compress the rotating column, ensuring an interference fit between the rotating column and the rotating hole. This prevents the rotating column from wobbling due to gaps between it and the rotating hole during the opening and closing of multiple blades. Consequently, the aperture size of the light-transmitting holes on the multiple blades becomes more controllable and precise.

[0038] Furthermore, the interaction between the second auxiliary hole and the rotating hole reduces the difficulty of achieving a zero-fit assembly between the rotating column and the rotating hole. It is understandable that during the machining process of the rotating column and the rotating hole, dimensional errors often occur due to machining or mechanical errors. When the diameter of the rotating hole is smaller than the diameter of the rotating column, it is difficult to assemble the rotating column into the rotating hole. The rotating column of this embodiment can be easily assembled into the rotating hole through the deformability of the second connecting rib.

[0039] In one possible implementation, the variable aperture also includes a spacer. The spacer is fixedly connected to the rotating support and is located on the side of the plurality of blades facing the rotating support. The spacer has a light-transmitting hole. The light-transmitting hole of the spacer connects the light-transmitting holes of the plurality of blades with the space of the rotating support.

[0040] The variable aperture includes an initial state, an intermediate state, and an end state. When the variable aperture is in the initial or intermediate state, the maximum aperture of the light-transmitting holes of the multiple blades is smaller than the aperture of the light-transmitting hole of the spacer. When the variable aperture is in the end state, the minimum aperture of the light-transmitting holes of the multiple blades is greater than or equal to the aperture of the light-transmitting hole of the spacer.

[0041] Understandably, variable aperture lenses offer multiple aperture settings. When applied to camera modules, variable apertures can improve image quality.

[0042] In one possible implementation, the inner edge of each blade includes a first segment and a second segment connecting the first segment. The first segment is arc-shaped. The second segment is either straight or arc-shaped.

[0043] The variable aperture has two intermediate states: a first intermediate state and a second intermediate state. When the variable aperture is in its initial state, the light-transmitting openings of the multiple blades are polygonal in shape. Each light-transmitting opening is formed by a first segment of each blade. When the variable aperture is in its first intermediate state, the light-transmitting openings of the multiple blades are circular in shape. Each light-transmitting opening is formed by a first segment of each blade. When the variable aperture is in its second intermediate state, the light-transmitting openings of the multiple blades are polygonal in shape. Each light-transmitting opening is formed by a second segment of each blade.

[0044] It is understandable that this embodiment has a variety of aperture settings for the variable aperture. When a variable aperture is applied to a camera module, it helps to improve image quality.

[0045] In one possible implementation, the variable aperture also includes ball bearings. The ball bearings are rotatably connected to the fixed base and rollwise connected to the rotating bracket. It is understood that, compared to the rotating bracket being directly rotatably connected to the fixed base, the rotating bracket in this embodiment is connected to the fixed base via ball bearings. The ball bearings can reduce the friction between the rotating bracket and the fixed base, thereby reducing the driving force required for the first magnet to rotate the rotating bracket, which in turn reduces the current input to the first coil, thus facilitating energy-saving settings for the variable aperture.

[0046] In one possible implementation, the mounting base includes a base and a mounting bracket. The mounting bracket is connected to the top of the base. The base has a first groove. The mounting bracket has a second groove. The first groove and the second groove combine to form a rotating groove. A ball bearing is rotatably connected within the rotating groove. The rotating bracket also has a rolling groove. The rolling groove extends circumferentially along the rotating bracket. The rolling groove is positioned opposite to the rotating groove. The ball bearing is rotatably connected within the rolling groove.

[0047] Secondly, embodiments of this application provide a camera module. The camera module includes a lens assembly and a variable aperture as described above. The variable aperture is fixedly connected to the lens assembly and located on the light-incident side of the lens assembly. It is understood that when a variable aperture is applied to a camera module, the camera module can also be miniaturized.

[0048] In one possible implementation, the lens assembly includes a motor and a lens. The lens is mounted on the motor. The motor drives the lens to move along the optical axis of the camera module. A variable aperture is fixedly connected to the lens and located on the light-incident side of the lens.

[0049] Thirdly, embodiments of this application provide an electronic device. The electronic device includes a housing and a camera module as described above, with the camera module disposed within the housing. It is understood that when the camera module is applied to the electronic device, the electronic device can also achieve a miniaturized design. Attached Figure Description

[0050] To illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0051] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0052] Figure 2 yes Figure 1 A partial cross-sectional view of the electronic device shown at line AA;

[0053] Figure 3 yes Figure 1 A partially exploded view of the camera module of the electronic device shown.

[0054] Figure 4 yes Figure 3 A partially exploded view of the variable aperture of the camera module shown;

[0055] Figure 5 yes Figure 4 The diagram shows the structure of the base at different angles.

[0056] Figure 6 yes Figure 4 The diagram shows the structure of the fixed bracket at different angles.

[0057] Figure 7 yes Figure 3 A partial cross-sectional schematic diagram of the variable aperture is shown.

[0058] Figure 8 yes Figure 4 The diagram shows the structure of the rotating bracket at different angles.

[0059] Figure 9 yes Figure 3 The diagram shows the structure of a portion of the variable aperture at different angles.

[0060] Figure 10 yes Figure 3 A partial cross-sectional schematic diagram of the variable aperture is shown.

[0061] Figure 11 yes Figure 4 The diagram shows the assembly of the base, the fixed bracket, and the ball bearings.

[0062] Figure 12 yes Figure 4 The diagram shows the assembly of the rotating bracket and the ball bearing.

[0063] Figure 13 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture.

[0064] Figure 14 yes Figure 4 The diagram shows the assembly of the flexible circuit board, the first coil, the second coil, and the driver chip at different angles.

[0065] Figure 15 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture.

[0066] Figure 16 yes Figure 15 The diagram shows a cross-sectional view of the partially variable aperture at the BB line.

[0067] Figure 17a This is a schematic diagram of one embodiment in which the first coil and the first magnet drive the rotating bracket to rotate.

[0068] Figure 17b yes Figure 3 The diagram shows a partial structural schematic of the variable aperture.

[0069] Figure 17c yes Figure 16 A top view of the first magnetic sheet and the first magnet in the first position;

[0070] Figure 17d yes Figure 16 A top view of the first magnetic sheet and the first magnet in the second position;

[0071] Figure 18 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture.

[0072] Figure 19 yes Figure 4 The diagram shows a structural schematic of one embodiment of the blade at different angles.

[0073] Figure 20 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture.

[0074] Figure 21 yes Figure 20 The diagram shows a partial variable aperture in an intermediate state.

[0075] Figure 22 yes Figure 20 The diagram shows a partial variable aperture in another intermediate state.

[0076] Figure 23 yes Figure 20 The diagram shows the structure with the variable aperture in its final position.

[0077] Figure 24 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture.

[0078] Figure 25 yes Figure 4 A schematic diagram of another embodiment of the blade shown;

[0079] Figure 26 This is a partial structural schematic diagram of the variable aperture provided in another embodiment of this application;

[0080] Figure 27a This is a partial structural schematic diagram of the variable aperture provided in another embodiment of the present application;

[0081] Figure 27b yes Figure 27aThe diagram shows a cross-sectional view of the partially variable aperture at the CC line.

[0082] Figure 28 yes Figure 27a The circuit diagram shown includes the driver chip, the first coil, the second coil, and the auxiliary resistor.

[0083] Figure 29 yes Figure 27a A cross-sectional schematic diagram of another implementation of the partially variable aperture at the CC line;

[0084] Figure 30 This is a circuit diagram of the driver chip, first coil, and second coil shown in this application in another embodiment. Detailed Implementation

[0085] For ease of understanding, the English abbreviations and related technical terms used in the embodiments of this application will be explained and described below.

[0086] With the lens as the boundary, the side where the object is located is the object side;

[0087] With the lens as the boundary, the side on which the image of the subject is located is called the image side;

[0088] The optical axis is a perpendicular axis passing through the center of a lens. The lens optical axis is the axis passing through the centers of all the lenses in the lens. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens should have all the light rays converging at a single point behind the lens; this point where all the light rays converge is called the focal point.

[0089] The embodiments of this application are described below with reference to the accompanying drawings.

[0090] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0091] Furthermore, the mathematical concepts mentioned in the embodiments of this application, such as symmetry, equality, parallelism, and perpendicularity, are limitations specific to the current technological level, rather than absolute and strict mathematical definitions. Slight deviations are permissible; approximations of symmetry, equality, parallelism, and perpendicularity are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0092] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the electronic device 1 provided in the embodiments of this application. The electronic device 1 can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, augmented reality (AR) glasses, AR helmet, virtual reality (VR) glasses, or VR helmet, or other devices with camera functions. Figure 1 The electronic device 1 in the illustrated embodiment is described using a mobile phone as an example.

[0093] Please see Figure 1 and Figure 2 , Figure 2 yes Figure 1 The diagram shows a partial cross-sectional view of electronic device 1 at line AA. Electronic device 1 includes a camera module 100, a housing 200, a screen 300, and a main circuit board 400. It should be noted that... Figure 1 , Figure 2 The accompanying drawings below only schematically illustrate some components of the electronic device 1; the actual shape, size, location, and construction of these components are not subject to change. Figure 1 , Figure 2 And as defined in the accompanying drawings below. Furthermore, since the main circuit board 400 and the camera module 100 are internal structures of the electronic device 1, Figure 1 The host circuit board 400 and the camera module 100 are schematically shown using dashed lines. For ease of description, the width direction of the electronic device 1000 is defined as the X-axis. The length direction of the electronic device 1000 is defined as the Y-axis. The thickness direction of the electronic device 1000 is defined as the Z-axis. It can be understood that the coordinate system settings of the electronic device 1000 can be flexibly set according to specific actual needs.

[0094] In other embodiments, when the electronic device 1 is a device of some other form, the electronic device 1 may not include the screen 300 and the host circuit board 400.

[0095] Exemplarily, the housing 200 includes a main frame 201 and a back cover 202. The back cover 202 is fixedly connected to one side of the main frame 201. The screen 300 is fixed to the side of the main frame 201 away from the back cover 202. The screen 300, the main frame 201, and the back cover 202 can together enclose the interior of the electronic device 1. The interior of the electronic device 1 can be used to house components of the electronic device 1, such as a battery, receiver, or microphone. The screen 300 can be used to display images, etc. The screen 300 can be a flat screen or a curved screen. The display of the screen 300 can be an organic light-emitting diode (OLED) display, or an active-matrix organic light-emitting diode (AMOLED) display, or a liquid crystal display (LCD), etc.

[0096] Please refer to it again. Figure 1 and Figure 2 The main circuit board 400 is fixed inside the electronic device 1. The main circuit board 400 may be equipped with chips such as a central processing unit (CPU), a graphics processing unit (GPU), or universal flash storage (UFS).

[0097] Furthermore, the camera module 100 is located inside the electronic device 1. The camera module 100 can be used to capture ambient light from outside the electronic device 1. The camera module 100 can be electrically connected to the host circuit board 400. In this way, the camera module 100 and the host circuit board 400 can transmit signals to each other. It is understood that the camera module 100 can be a rear camera module or a front camera module, etc. In addition, the camera module 100 can be a vertical camera module (for example, the optical axis direction of the camera module is the Z-axis direction) or a periscope camera module (for example, the optical axis direction of the camera module can be any direction on the XY plane). In this embodiment, the camera module 100 is described as an example of being both a rear camera module and a vertical camera module.

[0098] For example, the back cover 202 is provided with a light-transmitting hole 203. The light-transmitting hole 203 connects the interior of the electronic device 1 to the exterior of the electronic device 1. The electronic device 1 also includes a camera decorative element 501 and a cover plate 502. The cover plate 502 is fixedly connected to the inner surface of the camera decorative element 501. A portion of the camera decorative element 501 can be fixed to the inner surface of the back cover 202. A portion of the camera decorative element 501 contacts the hole wall of the light-transmitting hole 203. Through the cooperation of the camera decorative element 501 and the cover plate 502, water or dust from the outside can be prevented from entering the interior of the electronic device 1 through the light-transmitting hole 203. The cover plate 502 can be made of a transparent material, such as glass or plastic. Ambient light from outside the electronic device 1 can pass through the cover plate 502 and enter the interior of the electronic device 1. The camera module 100 collects the ambient light entering the interior of the electronic device 1.

[0099] Please see Figure 3 , Figure 3 yes Figure 1 The diagram shows a partially exploded view of the camera module 100 of the electronic device 1. The camera module 100 includes a module circuit board 10, a photosensitive chip 20, a bracket 30, a filter 40, a lens assembly 50, and a variable aperture 60. The photosensitive chip 20 can also be called an image sensor or a photosensitive element. The photosensitive chip 20 is used to collect ambient light and convert the image information carried by the ambient light into electrical signals. It should be noted that the optical axis of the camera module 100 includes the optical axis of the variable aperture 60. In this embodiment, both the optical axis direction of the camera module 100 and the optical axis direction of the variable aperture 60 are in the Z-axis direction.

[0100] In one embodiment, the module circuit board 10 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The module circuit board 10 can use an FR-4 dielectric substrate, a Rogers dielectric substrate, a hybrid dielectric substrate of Rogers and FR-4, etc.

[0101] For example, the module circuit board 10 is provided with a recess 11. The recess 11 forms an opening on one surface of the module circuit board 10.

[0102] Please see Figure 2 The module circuit board 10 can be fixed to the side of the screen 300 facing the rear cover 202. The module circuit board 10 can be electrically connected to the host circuit board 400. In this way, the module circuit board 10 and the host circuit board 400 can transmit signals to each other.

[0103] In one embodiment, the photosensitive chip 20 is fixedly connected to the module circuit board 10 and located within the recess 11. Thus, by placing the photosensitive chip 20 within the recess 11, the photosensitive chip 20 and the module circuit board 10 have an overlapping area in the Z-axis direction, thereby preventing the photosensitive chip 20 from increasing the thickness of the camera module 100 in the Z-axis direction due to stacking on the module circuit board 10.

[0104] In one embodiment, the photosensitive chip 20 is also electrically connected to the module circuit board 10. In this way, the photosensitive chip 20 can receive signals from the host circuit board 400 through the module circuit board 10, and can also send signals to the host circuit board 400 through the module circuit board 10.

[0105] Please refer to it again. Figure 2 The bracket 30 can be fixedly connected to the side of the module circuit board 10 away from the screen 300. The bracket 30 and the photosensitive chip 20 can be located on the same side of the module circuit board 10. For example, the bracket 30 can be fixed to the module circuit board 10 by means of glue or tape.

[0106] Please see Figure 2 and Figure 3 In one embodiment, the bracket 30 may have a light-transmitting hole 31. The light-transmitting hole 31 extends through two opposing surfaces of the bracket 30. A filter 40 is fixed to the bracket 30 and is located within the light-transmitting hole 31. The filter 40 is disposed opposite to the photosensitive chip 20. The filter 40 can be used to filter stray light from ambient light, thereby ensuring that the image captured by the camera module 100 has better clarity. The filter 40 can be, but is not limited to, a blue glass filter. For example, the filter 40 can also be a reflective infrared filter, or a dual-pass filter (a dual-pass filter allows visible light and infrared light in ambient light to pass through simultaneously, or allows visible light in ambient light and other light of a specific wavelength (e.g., ultraviolet light) to pass through simultaneously, or allows infrared light and other light of a specific wavelength (e.g., ultraviolet light) to pass through simultaneously).

[0107] Please refer to it again. Figure 3 and combined Figure 2 As shown, the lens assembly 50 can be a fixed-focus lens, an autofocus (AF) lens, or a zoom lens, etc. This embodiment will describe the lens assembly 50 using an AF lens as an example. The lens assembly 50 includes a motor 51 and a lens 52. The lens 52 is disposed on the motor 51. The motor 51 drives the lens 52 to move along the optical axis (i.e., the Z-axis direction) of the camera module 100. The motor 51 can be a voice coil motor or a shape memory alloy (SMA) motor. This application does not limit the specific structure of the motor 51.

[0108] In one embodiment, the motor 51 is fixedly connected to the bracket 30. The lens 52 is located on the side of the filter 40 away from the photosensitive chip 20. In this way, ambient light can be transmitted to the photosensitive chip 20 through the lens 52 and the filter 40.

[0109] Please refer to it again. Figure 2 and Figure 3 In one embodiment, the variable aperture 60 is located on the light-incident side of the lens 52 of the lens assembly 50 and is fixedly connected to the lens 52 of the lens assembly 50. The variable aperture 60 is also disposed opposite to the cover plate 502. The variable aperture 60 can be used to increase or decrease the amount of light entering the lens 52 of the lens assembly 50. For example, when the electronic device 1 takes pictures in low-light conditions, the variable aperture 60 can increase the amount of light entering the lens assembly 50. When the electronic device 1 takes pictures in well-lit conditions, the variable aperture 60 can decrease the amount of light entering the lens assembly 50.

[0110] It is understandable that when the size of the aperture of the variable aperture 60 and its position relative to the lens 52 change, the field of view of the lens 52 will also change. In this embodiment, by fixing the variable aperture 60 to the lens 52, when the motor 51 drives the lens 52 to move along the Z-axis, the variable aperture 60 can also move along the Z-axis. That is, during the movement of the lens 52 along the Z-axis, the position of the variable aperture 60 relative to the lens 52 does not change. Thus, without considering other factors affecting the field of view of the lens 52, when the position of the aperture of the variable aperture 60 relative to the lens 52 remains unchanged, the field of view of the lens 52 also does not change.

[0111] In other embodiments, the variable aperture 60 may also be fixedly connected to the motor 51. In this way, when the motor 51 drives the lens 52 to move along the Z-axis, the variable aperture 60 does not need to move along the Z-axis, and the lens 52 can move towards or away from the variable aperture 60.

[0112] In other embodiments, when the lens assembly 50 is a fixed-focus lens, the lens assembly 50 no longer includes the motor 51. In this case, the variable aperture 60 can be directly and fixedly connected to the light-incident side of the fixed-focus lens.

[0113] In this embodiment, the variable aperture 60 includes a starting state, an intermediate state, and an ending state. The intermediate state is any state between the starting state and the ending state. When the variable aperture 60 is in the starting state, the aperture opening of the variable aperture 60 is at its smallest, and the light flux entering the lens assembly 50 is minimal. When the variable aperture 60 is in the ending state, the aperture opening of the variable aperture 60 is at its largest, and the light flux entering the lens assembly 50 is maximum. In the following description, the structure in which the variable aperture 60 is in the starting state is used as an example.

[0114] Please see Figure 4 , Figure 4 yes Figure 3 The diagram shows a partially exploded view of the variable aperture 60 of the camera module 100. The variable aperture 60 includes a base 61, a fixed bracket 62, a rotating bracket 63, multiple balls 64, multiple blades 65, a pad 66, a first magnet 67a, a second magnet 67b, a first coil 68a, a second coil 68b, a flexible circuit board 69, a driver chip 71, a first magnetic conductive sheet 72a, a second magnetic conductive sheet 72b, and a top cover 73. It should be noted that in this embodiment, there are four balls 64, and each ball 64 has the same shape and size; therefore, each ball 64 uses the same designation. In other embodiments, the number of balls 64 is not limited, and the shape and size of each ball 64 can also be different.

[0115] In other embodiments, the variable aperture 60 may also include a plurality of balls 64, a pad 66, a second magnet 67b, a second coil 68b, a flexible circuit board 69, a driver chip 71, a first magnetic sheet 72a, a second magnetic sheet 72b, and a top cover 73.

[0116] Please see Figure 5 and combined Figure 4 As shown, Figure 5 yes Figure 4 The diagram shows the structure of the base 61 at different angles. In one embodiment, the base 61 includes a bottom wall 611 and a side wall 612. The side wall 612 of the base 61 is fixedly connected to the bottom wall 611 of the base 61. Both the side wall 612 and the bottom wall 611 of the base 61 are annular. The inner surface of the side wall 612 of the base 61 may be stepped. The side wall 612 of the base 61 may also be provided with a plurality of spaced-apart first grooves 613. The plurality of first grooves 613 may be arranged in a ring. Each first groove 613 forms an opening on the inner surface of the side wall 612 of the base 61. In this embodiment, the number of first grooves 613 is four.

[0117] In one embodiment, the sidewall 612 of the base 61 further includes a first notch 614 and a second notch 615 spaced apart. The first notch 614 and the second notch 615 can be arranged opposite to each other. Both the first notch 614 and the second notch 615 form openings on the inner and outer peripheral sides of the sidewall 612 of the base 61. Both the first notch 614 and the second notch 615 can connect the internal space of the base 61 to the external space of the base 61.

[0118] In one embodiment, the bottom wall 611 of the base 61 is provided with a first limiting groove 616 and a second limiting groove 617 spaced apart. The first limiting groove 616 may be disposed opposite to the first notch 614. The second limiting groove 617 may be disposed opposite to the second notch 615.

[0119] It is understood that the base 61 can be a symmetrical, partially symmetrical, or asymmetrical structure. In this embodiment, the base 61 is a symmetrical structure. This makes it less prone to tilting when the base 61 is in contact with other components.

[0120] Please see Figure 6 , Figure 6 yes Figure 4 The diagram shows the structure of the fixing bracket 62 at different angles. In one embodiment, the fixing bracket 62 can be ring-shaped. The top of the fixing bracket 62 has a plurality of spaced-apart rotating columns 621. The plurality of rotating columns 621 can be arranged in a ring. Exemplarily, the number of rotating columns 621 is six.

[0121] In one embodiment, the fixing bracket 62 is further provided with a plurality of spaced-apart second grooves 622. The plurality of second grooves 622 may be arranged in a ring. Each second groove 622 forms an opening on the inner surface of the fixing bracket 62.

[0122] In one embodiment, the fixing bracket 62 is further provided with a third notch 623 and a fourth notch 624 spaced apart. The third notch 623 and the fourth notch 624 are arranged opposite to each other. Both the third notch 623 and the fourth notch 624 form openings on the inner and outer peripheral sides of the fixing bracket 62. Both the third notch 623 and the fourth notch 624 can connect the internal space of the fixing bracket 62 to the external space of the fixing bracket 62.

[0123] It is understood that the fixed bracket 62 can be a symmetrical, partially symmetrical, or asymmetrical structure. In this embodiment, the fixed bracket 62 is a symmetrical structure. Thus, when the fixed bracket 62 cooperates with other components, it is less likely to tilt due to an unstable center of gravity.

[0124] Please see Figure 7 and combined Figure 5 and Figure 6 As shown, Figure 7 yes Figure 3 The diagram shows a partial cross-sectional view of the variable aperture 60. In one embodiment, a fixed bracket 62 is fixedly connected to the side wall 612 of the base 61. The base 61 and the fixed bracket 62 form a fixed seat 610. Multiple first grooves 613 and multiple second grooves 622 are arranged in a one-to-one correspondence to form a rotating groove 6220; that is, one first groove 613 and one second groove 622 form one rotating groove 6220. Additionally, a first notch 614 and a third notch 623 form a first through hole 6230. A second notch 615 and a fourth notch 624 form a second through hole 6240.

[0125] Please see Figure 8 , Figure 8 yes Figure 4 The diagram shows the structure of the rotating bracket 63 at different angles. In one embodiment, the rotating bracket 63 can be annular. The rotating bracket 63 encloses a space 630. The top of the rotating bracket 63 has a plurality of spaced-apart guide posts 631. The plurality of guide posts 631 can be arranged in a ring. Exemplarily, the number of guide posts 631 is six.

[0126] For example, the rotating bracket 63 is further provided with a plurality of spaced-apart rolling grooves 632. The plurality of rolling grooves 632 are arranged in a ring. The rolling grooves 632 are elongated. The rolling grooves 632 extend along the circumference of the rotating bracket 63 (that is, the circumferential direction, the direction around the axis of the rotating bracket 63). In this embodiment, the number of rolling grooves 632 is four.

[0127] For example, the rotating bracket 63 further includes a first mounting groove 633 and a second mounting groove 634 spaced apart. The first mounting groove 633 and the second mounting groove 634 are formed by recesses inward from the outer peripheral side surface 630a of the rotating bracket 63 towards the center of the rotating bracket 63. The first mounting groove 633 and the second mounting groove 634 are also spaced apart from each rolling groove 632. The outer peripheral side surface 630a of the rotating bracket 63 connects to the top and bottom surfaces of the rotating bracket 63. The outer peripheral side surface 630a of the rotating bracket 63 may be parallel to the optical axis direction of the variable aperture 60.

[0128] It is understood that the rotating bracket 63 can be a symmetrical structure, a partially symmetrical structure, or an asymmetrical structure. In this embodiment, the rotating bracket 63 is a symmetrical structure. Thus, when the rotating bracket 63 is mounted on the fixed base 610 (see [link to documentation]), Figure 7 When the rotation bracket 63 is not easily tilted due to instability of the center of gravity, it will not easily tilt.

[0129] Please see Figure 9 and combined Figure 8 As shown, Figure 9 yes Figure 3The diagram shows a partial structural schematic of the variable aperture 60 at different angles. The first magnet 67a can be fixedly connected to the first mounting groove 633 of the rotating bracket 63 by means of adhesive or other methods. Exemplarily, the first magnet 67a is arc-shaped. The shape of the first magnet 67a matches the shape of the first mounting groove 633. Thus, when the first magnet 67a is fixedly connected to the first mounting groove 633, the first magnet 67a can be embedded within the rotating bracket 63. On the one hand, the overall structure formed by the first magnet 67a and the rotating bracket 63 has better integrity; on the other hand, the first magnet 67a and the rotating bracket 63 have overlapping areas in all directions, and the first magnet 67a does not easily increase the size of the variable aperture 60. In other embodiments, the first magnet 67a can be embedded within the rotating bracket 63 by injection molding.

[0130] The second magnet 67b can be fixedly connected to the second mounting groove 634 of the rotating bracket 63 by means of adhesive or other methods. Exemplarily, the second magnet 67b is arc-shaped. The shape of the second magnet 67b matches the shape of the second mounting groove 634. Thus, when the second magnet 67b is fixedly connected to the second mounting groove 634, the second magnet 67b can be embedded within the rotating bracket 63. On the one hand, the overall structure formed by the second magnet 67b and the rotating bracket 63 has better integrity; on the other hand, the second magnet 67b and the rotating bracket 63 have overlapping areas in all directions, and the second magnet 67b does not easily increase the size of the variable aperture 60. In other embodiments, the second magnet 67b can be embedded within the rotating bracket 63 by injection molding.

[0131] For example, the first magnet 67a and the second magnet 67b are symmetrical about the center of the rotating bracket 63. Thus, when the first magnet 67a and the second magnet 67b are fixedly connected to the rotating bracket 63, the symmetry of the structure formed by the first magnet 67a, the second magnet 67b, and the rotating bracket 63 is better. At this time, when the first magnet 67a, the second magnet 67b, the rotating bracket 63, and other components cooperate with each other, the first magnet 67a, the second magnet 67b, and the rotating bracket 63 are less likely to tilt due to instability of the center of gravity.

[0132] Please see Figure 10 and combined Figure 7 and Figure 8 As shown, Figure 10 yes Figure 3The diagram shows a partial cross-sectional view of the variable aperture 60. In one embodiment, a rotating bracket 63 is disposed inside the base 61 and inside the fixed bracket 62, i.e., inside the fixed seat 610. It is understood that the rotating bracket 63 being located inside the fixed seat 610 means that the projection of the rotating bracket 63 onto the reference plane at least partially coincides with the projection of the fixed seat 610 onto the reference plane. The reference plane is parallel to the optical axis of the variable aperture 60.

[0133] Furthermore, the rotating bracket 63 is rotatably connected to the base 61 and the fixed bracket 62, that is, the rotating bracket 63 is rotatably connected to the fixed base 610. Multiple rotating grooves 6220 and multiple rolling grooves 632 are arranged opposite each other, forming a movable space; that is, one rotating groove 6220 is opposite to one rolling groove 632, forming a movable space. A portion of the ball bearing 64 is disposed within the rotating groove 6220, and the other portion of the ball bearing 64 is located within the rolling groove 632.

[0134] Please see Figure 11 and combined Figure 10 As shown, Figure 11 yes Figure 4 The diagram shows the assembly of the base 61, the fixed bracket 62, and the ball bearing 64. By setting the length and width of the rotating groove 6220, the sidewalls of the groove 6220 can abut against the ball bearing 64 in all directions. Thus, when the rotating bracket 63 rotates relative to the fixed base 610, the sidewalls of the rotating groove 6220 can restrict the ball bearing 64 from rolling relative to the rotating groove 6220 in all directions, allowing the ball bearing 64 to rotate within the rotating groove 6220.

[0135] In one embodiment, lubricating oil is provided between the ball 64 and the rotating groove 6220. The lubricating oil can reduce the friction between the ball 64 and the rotating groove 6220.

[0136] Please see Figure 12 and combined Figure 10 As shown, Figure 12 yes Figure 4 The diagram shows the assembly of the rotating bracket 63 and the ball bearing 64. By setting the length and width of the rolling groove 632, on the one hand, the sidewall of the rolling groove 632 in the width direction can abut against the ball bearing 64. In this way, when the rotating bracket 63 rotates relative to the fixed base 610, the sidewall of the rolling groove 632 in the width direction can restrict the ball bearing 64 from rolling along the width direction of the rolling groove 632. On the other hand, it ensures that the sidewall of the rolling groove 632 in the length direction does not abut against the ball bearing 64. In this way, when the rotating bracket 63 rotates relative to the fixed base 610, the ball bearing 64 can roll along the length direction of the rolling groove 632.

[0137] In one embodiment, lubricating oil may also be provided between the ball 64 and the rolling groove 632. The lubricating oil reduces the friction between the ball 64 and the rolling groove 632.

[0138] Please refer to it again. Figure 10 In one embodiment, the first magnet 67a, fixed to the rotating bracket 63, is disposed opposite to the first through hole 6230. At this time, the first magnet 67a can be exposed relative to the base 61 and the fixed bracket 62 through the first through hole 6230.

[0139] Please see Figure 13 , Figure 13 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture 60. In one embodiment, the second magnet 67b, fixed to the rotating bracket 63, is positioned opposite to the second through hole 6240. In this case, the second magnet 67b can be exposed relative to the base 61 and the fixed bracket 62 through the second through hole 6240.

[0140] Please see Figure 14 , Figure 14 yes Figure 4 The diagram shows the assembly of the flexible circuit board 69, the first coil 68a, the second coil 68b, and the driver chip 71 at different angles. In one embodiment, the flexible circuit board 69 includes a main body 691, a first extension 692, and a second extension 693. The main body 691 may be annular. The first extension 692 and the second extension 693 are respectively connected to both sides of the main body 691.

[0141] In one embodiment, a first coil 68a is fixedly connected to the main body 691 of the flexible circuit board 69 and is located on the inner peripheral side of the main body 691. The first coil 68a is also electrically connected to the main body 691 of the flexible circuit board 69. A second coil 68b is fixedly connected to the main body 691 of the flexible circuit board 69 and is located on the inner peripheral side of the main body 691. The second coil 68b is also electrically connected to the main body 691 of the flexible circuit board 69. Exemplarily, the portion of the main body 691 fixedly connected to the first coil 68a can be planar, thereby facilitating the fixed connection between the first coil 68a and the main body 691. Furthermore, the portion of the main body 691 fixedly connected to the second coil 68b can also be planar, thereby facilitating the fixed connection between the second coil 68b and the main body 691.

[0142] In one embodiment, the driver chip 71 can be fixedly connected to the main body 691 of the flexible circuit board 69 by means of soldering or the like. The driver chip 71 is also electrically connected to the first coil 68a and the second coil 68b. The driver chip 71 is used to supply power to the first coil 68a and the second coil 68b. In this embodiment, the driver chip 71 is electrically connected to the flexible circuit board 69, and is electrically connected to the first coil 68a and the second coil 68b through the flexible circuit board 69.

[0143] For example, the driver chip 71 can be located on the inner peripheral side of the main body 691 of the flexible circuit board 69, and within the area surrounded by the first coil 68a. In this way, the driver chip 71 and the first coil 68a are arranged more compactly on the flexible circuit board 69, which is beneficial for the miniaturization of the variable aperture 60.

[0144] Please see Figure 15 and combined Figure 14 As shown, Figure 15 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture 60. In one embodiment, the main body 691 of the flexible circuit board 69 is disposed around the outer peripheral side of the mounting base 610. The main body 691 of the flexible circuit board 69 can be fixedly connected to the outer peripheral side of the mounting base 610 by means of adhesive bonding or the like. In this way, the arrangement of the main body 691 of the flexible circuit board 69 and the mounting base 610 is relatively compact. The main body 691 of the flexible circuit board 69 occupies less space, which is beneficial for the miniaturization of the variable aperture 60.

[0145] In one embodiment, the first extension 692 and the second extension 693 of the flexible circuit board 69 are used for electrical connection to external devices of the variable aperture 60. Exemplarily, the first extension 692 and the second extension 693 of the flexible circuit board 69 can be electrically connected to the module circuit board 10 (see [link to module circuit board 10]) via traces within some components of the camera module 100 (e.g., the motor or bracket of the lens assembly). Figure 3 In this way, the driver chip 71 can be electrically connected to the module circuit board 10 through the flexible circuit board 69, that is, the module circuit board 10 can transmit electrical signals to the driver chip 71 through the flexible circuit board 69.

[0146] Please see Figure 16 , Figure 16 yes Figure 15The diagram shows a partial cross-sectional view of the variable aperture 60 at the BB line. A first coil 68a faces the first magnet 67a. A second coil 68b faces the second magnet 67b. It should be understood that the first coil 68a facing the first magnet 67a can mean that the plane of the first coil 68a is face-to-face with the first magnet 67a. In this embodiment, both the plane of the first coil 68a and the plane of the first magnet 67a are parallel to the optical axis of the variable aperture 60. The plane of the first coil 68a can be perpendicular to the axis of the winding of the first coil 68a. Similarly, the second coil 68b facing the second magnet 67b can mean that the plane of the second coil 68b is face-to-face with the second magnet 67b. In this embodiment, both the plane of the second coil 68b and the plane of the second magnet 67b are parallel to the optical axis of the variable aperture 60. The plane of the second coil 68b can be perpendicular to the axis of the winding of the second coil 68b.

[0147] In this embodiment, the first coil 68a is located within the first through hole 6230, and the second coil 68b is located within the second through hole 6240. Thus, the first coil 68a and the second coil 68b overlap with the mounting base 610 in all directions. This allows the first coil 68a and the second coil 68b to utilize the space occupied by the mounting base 610 without additionally increasing the size of the variable aperture 60, which facilitates a miniaturized design of the variable aperture 60.

[0148] In other embodiments, the first coil 68a may also be located outside the first through hole 6230. The second coil 68b may also be located outside the second through hole 6240.

[0149] In other embodiments, the positions of the first magnet 67a and the first coil 68a can be interchanged. The positions of the second magnet 67b and the second coil 68b can also be interchanged.

[0150] In this embodiment, when the driver chip 71 receives a signal, it can transmit a current signal to the first coil 68a and the second coil 68b via the flexible circuit board 69. When the first coil 68a has a current signal, it and the first magnet 67a can generate a force that interacts with each other. Thus, when the first magnet 67a is subjected to a force, it can drive the rotating bracket 63 to rotate relative to the base 61 and the fixed bracket 62. Furthermore, when the second coil 68b has a current signal, it and the second magnet 67b can generate a force that interacts with each other. Thus, when the second magnet 67b is subjected to a force, it can drive the rotating bracket 63 to rotate relative to the fixed bracket 62 and the base 61.

[0151] It is understood that by changing the magnetic position of the first magnet 67a (i.e., the positions of its south and north poles) or the direction of the current signal on the first coil 68a, the direction of the force on the first magnet 67a can be changed, thereby changing the rotation direction of the rotating bracket 63. Similarly, by changing the magnetic position of the second magnet 67b (i.e., the positions of its south and north poles) or the direction of the current signal on the second coil 68b, the direction of the force on the second magnet 67b can be changed, thereby changing the rotation direction of the rotating bracket 63. In this embodiment, the direction in which the first magnet 67a drives the rotating bracket 63 to rotate relative to the fixed bracket 62 and the base 61 is the same as the direction in which the second magnet 67b drives the rotating bracket 63 to rotate relative to the fixed bracket 62 and the base 61. At this time, the first magnet 67a and the second magnet 67b can jointly drive the rotating bracket 63 to rotate relative to the fixed bracket 62 and the base 61 along the first direction a ( Figure 16 Rotate (indicated by a solid line with an arrow) in that direction, or along the second direction b ( Figure 16 (The direction is indicated by a dashed line with an arrow.) Rotate.

[0152] Please see Figure 17a , Figure 17a This is a schematic diagram of one embodiment in which the first coil 68a and the first magnet 67a drive the rotating bracket 63 to rotate. The direction of the current in the first coil 68a is counterclockwise in the YZ plane. Figure 17a The first magnet 67a is indicated by a solid line with an arrow. It includes a south pole (S pole) and a north pole (N pole). In this embodiment, the polarization direction of the first magnet 67a (i.e., the direction from the south pole of the first magnet 67a to the north pole of the first magnet 67a, or the direction from the north pole of the first magnet 67a to the south pole of the first magnet 67a) can be the Y-axis direction. Exemplarily, the direction from the south pole of the first magnet 67a to the north pole of the first magnet 67a can be parallel to the circumferential direction of the rotating bracket 63. In this case, the first magnet 67a can be subjected to an Ampere force in the negative Y-axis direction, and the first magnet 67a can drive the rotating bracket 63 to rotate in the first direction a. It is understood that the direction of the current in the first coil 68a can be changed (e.g., from counterclockwise to clockwise), or the arrangement of the south and north poles of the first magnet 67a can be changed, so that the first magnet 67a can drive the rotating bracket 63 to rotate in the second direction b.

[0153] In one embodiment, when the first magnet 67a and the second magnet 67b jointly drive the rotating bracket 63 to rotate, because the first magnet 67a and the second magnet 67b are symmetrical about the center of the rotating bracket 63, the forces exerted on each position of the rotating bracket 63 by the first magnet 67a and the second magnet 67b are relatively balanced. Thus, the rotating bracket 63 is less likely to tilt due to uneven force distribution.

[0154] Please refer to it again. Figure 16 As shown, the driving chip 71 can also be used to detect the magnetic field strength of the first magnet 67a. It is understood that when the rotating bracket 63 rotates relative to the base 61 and the fixed bracket 62, the first magnet 67a also rotates with the rotating bracket 63 relative to the base 61 and the fixed bracket 62. At this time, the first magnet 67a is in different positions relative to the base 61 and the fixed bracket 62. The driving chip 71 can be used to detect the magnetic field strength when the first magnet 67a is in different positions. Thus, by detecting the magnetic field strength through the driving chip 71, the angle of rotation of the rotating bracket 63 relative to the base 61 and the fixed bracket 62 can be determined, thereby accurately determining the state of the variable aperture 60, and thus accurately controlling the amount of light entering the variable aperture 60.

[0155] In other embodiments, the driving chip 71 may also be positioned opposite to the second magnet 67b. The driving chip 71 is used to detect the magnetic field strength of the second magnet 67b at different positions.

[0156] In other embodiments, the driving chip 71 may not have the function of detecting the magnetic field strength of the first magnet 67a. The variable aperture 60 can detect the magnetic field strength when the first magnet 67a is in different positions by other means. For example, the variable aperture 60 may include a position sensor (e.g., a Hall sensor). When the position sensor is located around the first magnet 67a, it can detect the magnetic field strength of the first magnet 67a at different positions. When the position sensor is located around the second magnet 67b, it can detect the magnetic field strength of the second magnet 67b at different positions. When there are two position sensors, one located around the first magnet 67a and the other around the second magnet 67b, one position sensor can detect the magnetic field strength of the first magnet 67a at different positions, and the other position sensor can detect the magnetic field strength of the second magnet 67b at different positions.

[0157] Please see Figure 17b and combined Figure 4 As shown, Figure 17b yes Figure 3The diagram shows a partial structural schematic of the variable aperture 60. The first magnetic sheet 72a is fixedly connected to the first limiting groove 616 of the bottom wall 611 of the base 61 by means of adhesive bonding or other methods. The second magnetic sheet 72b is fixedly connected to the second limiting groove 617 of the bottom wall 611 of the base 61. For example, the first magnetic sheet 72a is arc-shaped, and its shape matches the shape of the first limiting groove 616. Thus, when the first magnetic sheet 72a is fixedly connected to the first limiting groove 616, it fits well with the groove, forming a better overall structure with the base 61 without significantly increasing the size of the variable aperture 60 by occupying additional space. It should be understood that the arrangement of the second magnetic sheet 72b can be referenced to the arrangement of the first magnetic sheet 72a. Further details are omitted here.

[0158] In other embodiments, the first magnetic sheet 72a can also be fixedly connected to the base 61 by an in-mold injection molding process.

[0159] Combination Figure 16 As shown, the first magnetic sheet 72a is located on the bottom wall 611 of the base 61, away from the first coil 68a, meaning it faces away from the first coil 68a. The first magnetic sheet 72a is located around the first magnet 67a. Magnetic force can be generated between the first magnetic sheet 72a and the first magnet 67a. The second magnetic sheet 72b is located on the bottom wall of the base 61, away from the second coil 68b. The second magnetic sheet 72b is located around the second magnet 67b. Magnetic force can be generated between the second magnetic sheet 72b and the second magnet 67b. Thus, through the cooperation between the first magnetic sheet 72a and the first magnet 67a, and between the second magnetic sheet 72b and the second magnet 67b, the connection between the rotating bracket 63 and the base 61 and the fixed bracket 62 is more stable, meaning the rotating bracket 63 has better stability. Therefore, when the rotating bracket 63 rotates relative to the base 61 and the fixed bracket 62, it is less prone to tilting or wobbling during rotation.

[0160] Please see Figure 17c and Figure 17d , Figure 17c yes Figure 16 The diagram shows a top view of the first magnetic sheet 72a and the first magnet 67a in their first position. Figure 17d yes Figure 16 The diagram shows a top view of the first magnetically conductive sheet 72a and the first magnet 67a in their second position. In this embodiment, Figure 17c and Figure 17d It can be any two positions where the variable aperture 60 is in the middle. In other embodiments, Figure 17c and Figure 17d These can also be the starting and ending positions of the variable aperture 60, respectively.

[0161] In this embodiment, both the first magnetic conductive sheet 72a and the first magnet 67a are arc-shaped. The arc length of the first magnetic conductive sheet 72a can be less than the arc length of the first magnet 67a. In other embodiments, when both the first magnetic conductive sheet 72a and the first magnet 67a are of other shapes, the length of the first magnetic conductive sheet 72a can be less than the length of the first magnet 67a.

[0162] Please see Figure 17c and combined Figure 16 As shown, when the first magnetic sheet 72a and the first magnet 67a are in the first position, the perpendicular line between the center P1 of the first magnetic sheet 72a and the central axis L of the rotating bracket 63 coincides with the perpendicular line between the center P2 of the first magnet 67a and the central axis L of the rotating bracket 63. It should be noted that the central axis L of the rotating bracket 63 is a point when viewed from above. Figure 17c The black dots are used to indicate this.

[0163] Please see Figure 17d and combined Figure 16 As shown, when the first magnetic sheet 72a and the first magnet 67a are in the second position, the perpendicular line between the center P1 of the first magnetic sheet 72a and the central axis L of the rotating bracket 63 is offset from the perpendicular line between the center P2 of the first magnet 67a and the central axis L of the rotating bracket 63. It can be understood that when the first coil 68a is not energized, the magnetic attraction between the first magnetic sheet 72a and the first magnet 67a can cause the first magnet 67a to drive the rotating bracket 63 to rotate, so that the perpendicular lines between the center P1 of the first magnetic sheet 72a and the central axis L of the rotating bracket 63 coincide with the perpendicular lines between the center P2 of the first magnet 67a and the central axis L of the rotating bracket 63. In this way, the first magnetic sheet 72a and the first magnet 67a can return from the second position to the first position.

[0164] In this embodiment, the arrangement of the second magnetic sheet 72b and the second magnet 67b can be referred to the arrangement of the first magnetic sheet 72a and the first magnet 67a. Specific details will not be repeated here.

[0165] Please see Figure 18 and combined Figure 4 As shown, Figure 18 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture 60. In one embodiment, the spacer 66 may be annular. The spacer 66 has a light-transmitting hole 661. The light-transmitting hole 661 of the spacer 66 communicates with the rotating bracket 63 (see [reference]). Figure 16 ) space 630 (see Figure 16The aperture of the light-transmitting hole 661 in the spacer 66 remains unchanged. The light-transmitting hole 661 of the spacer 66 can be used as a setting of the aperture of the variable aperture 60. This will be described in detail below with reference to the accompanying drawings. Further details will not be provided here.

[0166] Exemplarily, the gasket 66 is provided with a plurality of spaced-apart fixing holes 662. Exemplarily, the number of fixing holes 662 is equal to the number of rotating brackets 63 (see [link]). Figure 15 The number of guide posts 631, that is, the number of fixing holes 662, is six. In addition, multiple fixing holes 662 are located around the light-transmitting hole 661 of the gasket 66 and are arranged around the light-transmitting hole 661 of the gasket 66.

[0167] Please see Figure 18 and combined Figure 16 As shown, in one embodiment, the gasket 66 is fixedly connected to the top of the rotating bracket 63. Exemplarily, a plurality of guide posts 631 of the rotating bracket 63 pass through a plurality of fixing holes 662 of the gasket 66 in a one-to-one correspondence; that is, one guide post 631 passes through one fixing hole 662. It is understood that, through the cooperation between the fixing holes 662 of the gasket 66 and the guide posts 631 of the rotating bracket 63, the gasket 66 is less likely to wobble in the XY plane.

[0168] In one embodiment, the central axis of the light-transmitting hole 661 of the gasket 66 coincides with the central axis of the rotating bracket 63. The central axis of the light-transmitting hole 661 of the gasket 66 refers to a virtual axis passing through the center of the light-transmitting hole 661 of the gasket 66 and perpendicular to the plane containing the gasket 66. In other embodiments, the central axis of the light-transmitting hole 661 of the gasket 66 and the central axis of the rotating bracket 63 may not coincide.

[0169] Please see Figure 19 , Figure 19 yes Figure 4 The diagram shows a structural schematic of one embodiment of the blade 65 at different angles. This embodiment uses one blade 65 as an example to specifically describe the structure of the blade 65. In one embodiment, the blade 65 includes a first part 651 and a second part 652 connecting the first part 651. The first part 651 of the blade 65 is mainly used for connection with the fixed bracket 62. The second part 652 of the blade 65 is mainly used for connection with the rotating bracket 63. It should be understood that, for the convenience of describing the specific structure of the blade 65, the attached diagram is provided. Figure 18 The first part 651 and the second part 652 of the blade 65 are schematically distinguished by dashed lines, but this does not affect the integral molding structure of the blade 65.

[0170] For example, the first portion 651 of the blade 65 is provided with a rotating hole 653. For example, the rotating hole 653 can be a circular hole.

[0171] For example, the second portion 652 of the blade 65 is provided with a guide hole 654. For example, the guide hole 654 can be an arc-shaped hole. The guide hole 654 includes a first end wall 6541 and a second end wall 6542 disposed opposite to each other. The first end wall 6541 is disposed near the rotating hole 653 relative to the second end wall 6542.

[0172] In one embodiment, the inner edge of the blade 65 is generally sickle-shaped. The inner edge of the blade 65 includes a first segment 655a and a second segment 655b connected in sequence. The first segment 655a can be arc-shaped. The second segment 655b can be arc-shaped or straight. When the second segment 655b is arc-shaped, its radius of curvature is smaller than that of the first segment 655a. In this embodiment, the second segment 655b is described as arc-shaped.

[0173] Please see Figure 20 and combined Figure 18 As shown, Figure 20 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture 60. This embodiment uses one blade 65 as an example to specifically describe the connection relationship between the blade 65 and the fixed support 62 and the rotating support 63. The first part 651 of the blade 65 is rotatably connected to the fixed support 62. Exemplarily, multiple rotating posts 621 of the fixed support 62 pass through multiple rotating holes 653 of the blades 65 in a one-to-one correspondence; that is, one rotating post 621 of the fixed support 62 passes through one rotating hole 653 of the blade 65. It can be understood that the wall of the rotating hole 653 can rotate relative to the rotating post 621. Thus, through the cooperation of the rotating hole 653 and the rotating post 621, the blade 65 can rotate relative to the fixed support 62 with the rotating post 621 as the axis of rotation.

[0174] In other embodiments, the positions of the rotating column 621 and the rotating hole 653 can be interchanged. The rotating column 621 is disposed on the blade 65. The rotating hole 653 is disposed on the rotating bracket 63.

[0175] Additionally, the second part 652 of the blade 65 is slidably connected to the rotating support 63 (see also...). Figure 16 For example, the multiple guide posts 631 of the rotating bracket 63 pass through the guide holes 654 of the multiple blades 65 in a one-to-one correspondence; that is, one guide post 631 of the rotating bracket 63 passes through the guide hole 654 of one blade 65. It is understood that the guide post 631 can slide relative to the hole wall of the guide hole 654. In this way, through the cooperation of the guide hole 654 and the guide post 631, the blade 65 can be slidably connected to the rotating bracket 63.

[0176] In other embodiments, the positions of the guide post 631 and the guide hole 654 can be interchanged. In other words, the guide post 631 can be disposed on the blade 65, and the guide hole 654 can be disposed on the rotating bracket 63.

[0177] Please refer to it again. Figure 20 and combined Figure 19 As shown, multiple blades 65 are arranged in a ring and together surround a light-transmitting hole 650. Exemplarily, the inner edges of the multiple blades 65 together surround the light-transmitting hole 650. The light-transmitting hole 650 and the light-transmitting hole 661 of the gasket 66 (see [reference]). Figure 18 The blades 65 are connected. Multiple blades 65 are located on top of the pad 66. It is understood that since the first part 651 of each blade 65 is rotatably connected to the fixed bracket 62, and the second part 652 of each blade 65 is slidably connected to the rotating bracket 63, the aperture of the light-transmitting holes 650 of the multiple blades 65 can increase or decrease when the blades 65 are unfolded or closed, and the shape of the light-transmitting holes 650 of the multiple blades 65 changes. Of course, in other embodiments, the shape of the light-transmitting holes 650 of the multiple blades 65 can be changed so that the shape does not change when the multiple blades 65 are unfolded or closed.

[0178] In one embodiment, the central axis of the light-transmitting holes 650 of the plurality of blades 65 coincides with the central axis of the rotating support 63. The central axis of the light-transmitting holes 650 of the plurality of blades 65 refers to a virtual axis passing through the center of the light-transmitting holes 650 of the plurality of blades 65 and perpendicular to the plane containing the plurality of blades 65. In other embodiments, the central axis of the light-transmitting holes 650 of the plurality of blades 65 may not coincide with the central axis of the rotating support 63.

[0179] The preceding text has detailed the connection relationship between the blade 65 and the fixed support 62 and the rotating support 63. The following text will specifically describe the relationship between the movement of the blade 65 and the size of the light-transmitting holes 650 of the multiple blades 65. This embodiment uses one of the blades 65 as an example to specifically describe the structure of the blade 65.

[0180] Please refer to it again. Figure 20 When the variable aperture 60 is in the initial state, the guide post 631 of the rotating bracket 63 is positioned close to the first end wall 6541 of the guide hole 654. The maximum aperture of the light-transmitting holes 650 of the plurality of blades 65 is a first aperture d1. In this embodiment, the value of the first aperture d1 can be 1.44 mm. It should be understood that because the value of the first aperture d1 is small, the light flux passing through the light-transmitting holes 650 is relatively small.

[0181] For example, when the variable aperture 60 is in the initial state, the light-transmitting holes 650 of the plurality of blades 65 are polygonal in shape. The light-transmitting holes 650 of the plurality of blades 65 are formed by a partial arc of the first segment 655a of each blade 65. In this embodiment, the light-transmitting holes 650 of the plurality of blades 65 are regular polygons.

[0182] Please see Figure 21 , Figure 21 yes Figure 20 The diagram shows a portion of the variable aperture 60 in an intermediate state. When the variable aperture 60 is in the first intermediate state, the rotating bracket 63 (see [reference]) is in operation. Figure 16 The guide post 631 is located between the first end wall 6541 and the second end wall 6542 of the guide hole 654. The maximum aperture of the light-transmitting holes 650 of the plurality of blades 65 is the second aperture d2. The second aperture d2 is larger than the first aperture d1. In this embodiment, the value of the second aperture d2 can be 2.05 mm.

[0183] For example, when the variable aperture 60 is in the first intermediate state, the light-transmitting holes 650 of the plurality of blades 65 are circular in shape. The light-transmitting holes 650 of the plurality of blades 65 are formed by the entire arc of the first segment 655a of each blade 65.

[0184] Please see Figure 22 , Figure 22 yes Figure 20 The diagram shows a portion of the variable aperture 60 in another intermediate state. When the variable aperture 60 is in the second intermediate state, the guide post 631 of the rotating bracket 63 is located between the first end wall 6541 and the second end wall 6542 of the guide hole 654. The maximum aperture of the light-transmitting holes 650 of the plurality of blades 65 is the third aperture d3. The third aperture d3 is larger than the second aperture d2. In this embodiment, the value of the third aperture d3 can be 2.9 mm.

[0185] For example, when the variable aperture 60 is in the second intermediate state, the light-transmitting holes 650 of the plurality of blades 65 are polygonal in shape. The light-transmitting holes 650 of the plurality of blades 65 are formed by a portion of the second segment 655b of each blade 65. The light-transmitting holes 650 of the plurality of blades 65 in this embodiment are regular polygons.

[0186] Understandably, when the variable aperture 60 is in its initial or intermediate state, the maximum aperture of the light-transmitting holes 650 of the multiple blades 65 is smaller than the aperture of the light-transmitting hole 661 of the gasket 66. At this time, the light-transmitting holes 650 of the multiple blades 65 constitute the aperture of the variable aperture 60, that is, the light-transmitting holes 650 of the multiple blades 65 can control the luminous flux of ambient light.

[0187] Please see Figure 23 , Figure 23 yes Figure 20 The diagram shows a partial view of the variable aperture 60 in its final state. When the variable aperture 60 is in its final state, the guide post 631 of the rotating bracket 63 is positioned near the second end wall 6542 of the guide hole 654. The apertures of the light-transmitting holes 650 of the plurality of blades 65 continue to increase. At this time, the light-transmitting hole 661 of the pad 66 is exposed relative to each blade 65, and the minimum aperture of the light-transmitting holes 650 of the plurality of blades 65 is greater than or equal to the aperture of the light-transmitting hole 661 of the pad 66. At this time, the light-transmitting hole 661 of the pad 66 constitutes the aperture of the variable aperture 60. In this embodiment, the aperture of the light-transmitting hole 661 of the pad 66 can be 4.42 mm.

[0188] For example, when the variable aperture 60 is in the end state, the aperture hole of the variable aperture 60 is circular.

[0189] The following text combines Figure 20 and Figure 23 The movement process of blade 65 will be described in detail below. In this embodiment, the movement of one blade 65 will be used as an example for description.

[0190] Please refer to it again. Figure 20 and Figure 21 When the variable aperture 60 transitions from the initial state to the first intermediate state, the rotating bracket 63 rotates relative to the fixed bracket 62. The guide post 631 of the rotating bracket 63 can drive the blades 65 to rotate around the rotating post 621 of the fixed bracket 62. The guide post 631 transitions from a state near the first end wall 6541 of the guide hole 654 to a state near the second end wall 6542 of the guide hole 654. The aperture of the light-transmitting holes 650 of the multiple blades 65 increases. For example, the shape of the light-transmitting holes 650 of the multiple blades 65 changes from a regular polygon to a circle.

[0191] Please refer to it again. Figure 21 and Figure 22 When the variable aperture 60 transitions from the first intermediate state to the second intermediate state, the rotating bracket 63 continues to rotate relative to the base 61 and the fixed bracket 62, the wall of the rotating hole 653 continues to rotate relative to the rotating column 621, and the guide column 631 continues to approach the second end wall 6542 of the guide hole 654. The aperture of the light-transmitting holes 650 of the plurality of blades 65 continues to increase. Exemplarily, the shape of the light-transmitting holes 650 of the plurality of blades 65 changes from a circle to a regular polygon.

[0192] Please refer to it again. Figure 22 and Figure 23When the variable aperture 60 transitions from the second intermediate state to the final state, the rotating bracket 63 continues to rotate relative to the fixed bracket 62, and the wall of the rotating hole 653 continues to rotate relative to the rotating column 621. The guide column 631 transitions to a state close to the second end wall 6542 of the guide hole 654. The light-transmitting hole 661 of the gasket 66 is exposed relative to the multiple blades 65. The light-transmitting hole 661 of the gasket 66 constitutes the aperture hole of the variable aperture 60. The aperture hole of the variable aperture 60 changes from a regular polygon to a circle.

[0193] Please see Figure 24 and combined Figure 4 As shown, Figure 24 yes Figure 3 The diagram shows a partial structural schematic of the variable aperture 60. In one embodiment, the upper cover 73 may be annular. A light-transmitting hole 731 is formed on the inner side of the upper cover 73. The upper cover 73 is provided with a plurality of first limiting holes 732 and a plurality of second limiting holes 733. The plurality of first limiting holes 732 are spaced apart and surround the light-transmitting hole 731 of the upper cover 73. The plurality of second limiting holes 733 are spaced apart and surround the light-transmitting hole 731 of the upper cover 73. The plurality of second limiting holes 733 are also spaced apart from the plurality of first limiting holes 732.

[0194] Please refer to it again. Figure 24 and combined Figure 16 As shown, in one embodiment, the upper cover 73 is fixedly connected to the top of the fixing bracket 62, that is, the upper cover 73 is fixedly connected to the side of the fixing bracket 62 away from the base 61. The upper cover 73 covers multiple blades 65. In this way, in the Z-axis direction, the upper cover 73 can limit the multiple blades 65, thereby preventing the multiple blades 65 from falling out. In addition, the light-transmitting hole 731 of the upper cover 73 is arranged opposite to the light-transmitting holes 650 of the multiple blades 65. In this way, ambient light can be transmitted through the light-transmitting hole 731 of the upper cover 73 to the light-transmitting holes 650 of the multiple blades 65.

[0195] In one embodiment, a portion of the rotating post 621 of the fixed bracket 62 is disposed within the first limiting hole 732 of the upper cover 73. This makes the connection between the fixed bracket 62 and the upper cover 73 more stable, and the upper cover 73 and the fixed bracket 62 can form a more integral structure. Furthermore, a portion of the guide post 631 of the rotating bracket 63 is disposed within the second limiting hole 733 of the upper cover 73, and the guide post 631 of the rotating bracket 63 can slide within the second limiting hole 733. Thus, the second limiting hole 733 can limit the guide post 631 of the rotating bracket 63 in the XY plane, thereby preventing the guide post 631 of the rotating bracket 63 from easily shaking during rotation.

[0196] In this embodiment, the central axis of the light-transmitting hole 731 of the upper cover 73 coincides with the central axis of the light-transmitting holes 650 of the plurality of blades 65. In other embodiments, the central axis of the light-transmitting hole 731 of the upper cover 73 may not coincide with the central axis of the light-transmitting holes 650 of the plurality of blades 65.

[0197] The structure of a variable aperture 60 has been described above in detail with reference to the accompanying drawings. The size of the light-transmitting aperture 650 of the multiple blades 65 of the variable aperture 60 can be accurately adjusted. Furthermore, the variable aperture 60 of this application can also solve some technical problems of traditional variable aperture 60s. Specifically, as follows:

[0198] Firstly, when the rotating bracket 63 is located on the outer side of the fixed base 610 (including the outer side of the base 61 and the outer side of the fixed bracket 62), a certain space needs to be reserved between the rotating bracket 63 and the components on the outer side of the fixed base 610 to avoid interference between them. This results in a relatively large structure for the variable aperture 60, which is not conducive to its miniaturization. However, in this embodiment, by placing the rotating bracket 63 on the inner side of the fixed base 610, the rotating bracket 63 will not interfere with the components on the outer side of the fixed base 610, and the components on the outer side of the fixed base 610 can be placed close to the fixed base 610, thus facilitating the miniaturization of the variable aperture 60.

[0199] Furthermore, by fixing the first magnet 67a and the second magnet 67b to the rotating bracket 63, and fixing the first coil 68a and the second coil 68b to the fixed base 610, when the first coil 68a and the second coil 68b are energized, the first magnet 67a and the second magnet 67b can cooperate to drive the rotating bracket 63 to rotate relative to the fixed base 610. It is understood that, on the one hand, the structure of the drive device composed of the first magnet 67a, the second magnet 67b, the first coil 68a, and the second coil 68b is relatively simple. On the other hand, the first magnet 67a, the second magnet 67b, the first coil 68a, and the second coil 68b do not need to move to pull the rotating bracket 63 to rotate. Thus, the variable aperture 60 does not need to provide additional space for the first magnet 67a, the second magnet 67b, the first coil 68a, and the second coil 68b to move. The smaller space occupied by the first magnet 67a, the second magnet 67b, the first coil 68a, and the second coil 68b is beneficial for the miniaturization of the variable aperture 60.

[0200] Furthermore, by forming a first mounting groove 633 and a second mounting groove 634 on the outer peripheral side 630a of the rotating bracket 63, when the first magnet 67a is mounted in the first mounting groove 633 and the second magnet 67b is mounted in the second mounting groove 634, at least a portion of the first magnet 67a and at least a portion of the second magnet 67b can be embedded within the rotating bracket 63. Thus, at least a portion of the first magnet 67a overlaps with the rotating bracket 63. The presence of at least a portion of the first magnet 67a and at least a portion of the second magnet 67b does not additionally increase the size of the variable aperture 60, which facilitates the miniaturization of the variable aperture 60.

[0201] Furthermore, by forming a first through hole 6230 and a second through hole 6240 on the peripheral side of the mounting base 610, when the first coil 68a is disposed in the first through hole 6230 and the second coil 68b is disposed in the second through hole 6240, the first coil 68a and the second coil 68b have overlapping areas with the mounting base 610 in all directions. In this way, the first coil 68a and the second coil 68b can utilize the space occupied by the mounting base 610, and the first coil 68a and the second coil 68b do not additionally increase the size of the variable aperture 60, which is beneficial for miniaturizing the variable aperture 60.

[0202] The variable aperture 46 of this application also has some advantages. Specifically:

[0203] This application arranges the rotating bracket 63 inside the fixed base 610, so that when the rotating bracket 63 rotates relative to the fixed base 610, the rotating bracket 63 will not collide with the components on the outside of the base 61 and the components on the outside of the fixed bracket 62, thereby ensuring that the size of the aperture of the light-transmitting hole 650 of the multiple blades 65 can be accurately controlled in different states.

[0204] Furthermore, compared to the scheme of fixing the first magnet 67a and the second magnet 67b to the base 61 or the fixed bracket 62, and fixing the first coil 68a and the second coil 68b to the rotating bracket 63, this embodiment fixes the first magnet 67a and the second magnet 67b to the rotating bracket 63, and fixes the first coil 68a and the second coil 68b to the base 61 or the fixed bracket 62, so that the wires of the first coil 68a and the second coil 68b will not interfere with the rotating bracket 63 during the rotation of the rotating bracket 63.

[0205] In this embodiment, by fixing a first magnetic sheet 72a and a second magnetic sheet 72b to the bottom wall of the base 61, the first magnetic sheet 72a can generate a magnetic force with the first magnet 67a, and the second magnetic sheet 72b can generate a magnetic force with the second magnet 67b. Thus, through the mutual cooperation between the first magnetic sheet 72a and the first magnet 67a, and between the second magnetic sheet 72b and the second magnet 67b, the connection between the rotating bracket 63 and the base 61 and the fixed bracket 62 is more stable, meaning the rotating bracket 63 has better stability. When the rotating bracket 63 rotates relative to the fixed base 610, it is less prone to tilting or wobbling during rotation.

[0206] In this embodiment, the variable aperture 60 of this application can also achieve a closed-loop effect. Specifically, the driving chip 71 can detect the magnetic field strength when the first magnet 67a is in different positions. In this way, the angle of rotation of the rotating bracket 63 relative to the base 61 can be determined by the magnetic field strength detected by the driving chip 71, thereby accurately determining the state of the variable aperture 60, that is, accurately determining the aperture size of the light-transmitting holes 650 of the multiple blades 65 of the variable aperture 60, and thus accurately controlling the light flux entering the variable aperture 60.

[0207] In other embodiments, the first magnet 67a may also employ other mover 67a structures. The first coil 68a may also employ other stator 68a structures. Specifically, this application does not impose specific limitations. Exemplarily, the mover 67a may be a gear. The stator 68a may be a motor. The output end of the motor may mesh with the gear. When the motor is energized, the motor may drive the gear to rotate. The gear may drive the rotating bracket 63 to rotate.

[0208] In other embodiments, the second magnet 67b may also employ other mover structures. The second coil 68b may also employ other stator structures. Specifically, this application does not impose specific limitations. Exemplarily, the mover may be a gear. The stator may be a motor. The output end of the motor may mesh with the gear. When the motor is energized, the motor may drive the gear to rotate. The gear may drive the rotating support 63 to rotate.

[0209] The above text, with reference to the accompanying drawings, describes a structure for a variable aperture 60. The following text, also with reference to the accompanying drawings, describes several other implementations of the variable aperture 60 structure.

[0210] The second implementation method, which shares the same technical content as the first implementation method, will not be described again: Please refer to... Figure 25 , Figure 25 yes Figure 4The diagram shows another embodiment of the blade 65. The blade 65 is also provided with a first auxiliary hole 666 and a second auxiliary hole 667 spaced apart. The first auxiliary hole 666 and the second auxiliary hole 667 are both spaced apart from the guide hole 654 and the rotating hole 653.

[0211] In one embodiment, a first auxiliary hole 666 is disposed around the guide hole 654. The first auxiliary hole 666 and the guide hole 654 can form an elastic hole structure. Specifically, a first connecting rib 668 is formed between the first auxiliary hole 666 and the guide hole 654. It is understood that the width of the first connecting rib 668 is small, and the hardness of the first connecting rib 668 is low. At this time, the first connecting rib 668 can deform under external force. The first connecting rib 668 can return to its original state when not subjected to external force. Therefore, the first connecting rib 668 has a certain degree of elasticity.

[0212] Please see Figure 26 and combined Figure 25 As shown, Figure 26 This is a partial structural schematic diagram of the variable aperture 60 provided in another embodiment of this application. When the guide post 631 is positioned within the guide hole 654, the first connecting rib 668, possessing a certain elasticity, can deform to provide sufficient assembly space for the guide post 631, thereby reducing the assembly difficulty between the guide post 631 and the guide hole 654. Furthermore, after the guide post 631 is positioned within the guide hole 654, the first connecting rib 668 can deform to compress the guide post 631, allowing for an interference fit between the guide post 631 and the guide hole 654, i.e., a zero-clearance fit. Thus, during the opening and closing of the blades 65, the guide post 631 will not wobble due to any gap between it and the guide hole 654. At this time, the aperture size of the light-transmitting holes 650 of the multiple blades 65 is more controllable and has higher precision. It should be noted that the gap between the guide post 631 and the guide hole 654 can occur in two situations: First, to ensure the guide post 631 can be positioned within the guide hole 654, the diameter of the guide hole 654 is larger than the diameter of the guide post 631 during the machining of the blade 65. Second, during the machining of the blade 65, mechanical or process errors may cause the diameter of the guide hole 654 to be larger than the diameter of the guide post 631. Alternatively, during the machining of the blade 65, mechanical or process errors may result in an irregular shape for the guide hole 654.

[0213] In other embodiments, the guide post 631 and the guide hole 654 may also adopt other mating methods. This application does not impose specific limitations.

[0214] In other embodiments, the shape of the first auxiliary hole 666 is not limited to... Figure 25 and Figure 26 The shape is as shown in the diagram. For example, the first auxiliary hole 666 can also be circular or arc-shaped.

[0215] Please refer to it again. Figure 25 In one embodiment, a second auxiliary hole 667 is disposed around the rotating hole 653. The second auxiliary hole 667 and the rotating hole 653 can form an elastic hole structure. Specifically, a second connecting rib 669 is formed between the second auxiliary hole 667 and the rotating hole 653. It is understood that the width of the second connecting rib 669 is small, and the hardness of the second connecting rib 669 is low. At this time, the second connecting rib 669 can deform under external force. The second connecting rib 669 can return to its original state when not subjected to external force. The second connecting rib 669 has a certain degree of elasticity. In addition, both the second auxiliary hole 667 and the rotating hole 653 penetrate the side of the blade 65. In this way, the second connecting rib 669 is more easily deformed, that is, the elasticity of the second connecting rib 669 is better.

[0216] In other embodiments, the second auxiliary hole 667 and the rotating hole 653 may not penetrate the side of the blade 65.

[0217] In other embodiments, the shape of the second auxiliary hole 667 is not limited to... Figure 25 and Figure 26 The shape is as shown in the diagram. For example, the shape of the second auxiliary hole 667 can also be circular or arc-shaped, etc.

[0218] Please refer to it again. Figure 26 and combined Figure 25 As shown, during the process of the rotating column 621 being positioned in the rotating hole 653, the second connecting rib 669, due to its elasticity, can provide sufficient assembly space for the rotating column 621 through deformation, thereby reducing the assembly difficulty between the rotating column 621 and the rotating hole 653. Furthermore, after the rotating column 621 is positioned in the rotating hole 653, the second connecting rib 669 can deform and compress the rotating column 621, allowing it to achieve an interference fit with the rotating hole 653. Thus, during the opening and closing of the multiple blades 65, the rotating column 621 will not wobble due to any gap between it and the rotating hole 653. At this time, the aperture size of the light-transmitting holes of the multiple blades 65 is more controllable and has higher precision.

[0219] In other embodiments, the assembly difficulty of achieving zero fit between the rotating column 621 and the rotating hole 653 can also be reduced by the mutual cooperation between the second auxiliary hole 667 and the rotating hole 653. It is understood that during the machining process of the rotating column 621 and the rotating hole 653, dimensional errors often occur due to machining errors or mechanical errors. When the diameter of the rotating hole 653 is smaller than the diameter of the rotating column 621, it is difficult to assemble the rotating column 621 into the rotating hole 653. In this embodiment, the rotating column 621 can be easily assembled into the rotating hole 653 through the deformability of the second connecting rib 669.

[0220] In one embodiment, the blade 65 can be made of a non-magnetic metallic material, such as aluminum. In this case, the blade 65 has higher hardness. The first connecting rib 668 and the second connecting rib 669 are less prone to breakage.

[0221] In one embodiment, a coating may be formed on the surface of the blade 65. Exemplarily, the coating is formed on the surface of the blade 65 by vapor deposition or sputtering. The coating can improve the smoothness of the blade 65, thereby reducing the friction between the blades 65 during opening and closing. Furthermore, the strength of the first connecting rib 668 and the second connecting rib 669 can be further improved, making them less prone to breakage.

[0222] The third implementation method, which shares the same technical content as the first implementation method, will not be repeated here: Please refer to... Figure 27a and Figure 27b , Figure 27a This is a partial structural schematic diagram of the variable aperture 60 provided in another embodiment of the present application. Figure 27b yes Figure 27a The diagram shows a cross-sectional view of the partially variable aperture 60 at the CC line. The variable aperture 60 also includes an auxiliary resistor 74. The auxiliary resistor 74 is fixedly connected to the main body 691 of the flexible circuit board 69 and electrically connected to the main body 691 of the flexible circuit board 69. The auxiliary resistor 74 is positioned closer to the second coil 68b than the first coil 68a, meaning the distance between the auxiliary resistor 74 and the first coil 68a is greater than the distance between the auxiliary resistor 74 and the second coil 68b. In this case, the auxiliary resistor 74 is farther from the driver chip 71.

[0223] For example, the auxiliary resistor 74 is located within the area enclosed by the second coil 68b. This arrangement of the auxiliary resistor 74 and the second coil 68b on the main body 691 of the flexible circuit board 69 is more compact, which facilitates the miniaturization of the variable aperture 60. In other embodiments, the position of the auxiliary resistor 74 is not limited.

[0224] Please see Figure 28, Figure 28 yes Figure 27a The circuit diagram shown illustrates the driver chip 71, the first coil 68a, the second coil 68b, and the auxiliary resistor 74. The driver chip 71, the first coil 68a, the second coil 68b, and the auxiliary resistor 74 are connected in series. Figure 28 V1 is the power supply voltage of the driver chip 71. R1 is the resistance value of the first coil 68a. R2 is the resistance value of the second coil 68b. R3 is the resistance value of the auxiliary resistor 74. In this embodiment, the resistance value R1 of the first coil 68a is equal to the resistance value R2 of the second coil 68b. The sum of the resistance value R3 of the auxiliary resistor 74 and the resistance value R2 of the second coil 68b is greater than the resistance value R1 of the first coil 68a. For example, the resistance values ​​R1 of the first coil 68a and R2 of the second coil 68b are both equal to 12.5 ohms (Ω). The resistance value R3 of the auxiliary resistor 74 is equal to 20 ohms (Ω).

[0225] Please refer to Table 1 below. Table 1 is a data table showing the electrical parameters of the variable aperture in this embodiment and the electrical parameters of the variable aperture in the comparative scheme. For details, please refer to... Figure 29 , Figure 29 yes Figure 27a The diagram shows a cross-sectional view of another embodiment of the partially variable aperture 60 at the CC line. The difference between this embodiment and the comparative embodiment is that the variable aperture 60 does not include the auxiliary resistor 74. The driver chip, the first coil 68a, and the second coil 68b are connected in series.

[0226] Table 1 is a data table showing the electrical parameters of the variable aperture in this embodiment and the electrical parameters of the variable aperture in the comparative scheme.

[0227]

[0228] In this data table, the coil current can be the current of the first coil and the second coil; the maximum current can be the current when the rotating bracket overcomes the maximum static friction and rotates relative to the fixed base; the total power consumption is the total power consumption of the entire circuit (including the power consumption of the first coil, the power consumption of the second coil, the power consumption of the driver chip, and the losses of the wires, etc.). The coil resistance can be the sum of the resistance values ​​of the first coil and the second coil. The coil power consumption can be the sum of the power consumption of the first coil and the power consumption of the second coil.

[0229] As can be understood from the data in the table above, the power consumption of the driver chip in the comparative scheme is 54.4mW, while the power consumption of the driver chip 71 in this embodiment is 41.9mW. Clearly, the power consumption of the driver chip 71 in this embodiment is lower, and the heat generated by the driver chip 71 is less. In this embodiment, by connecting an auxiliary resistor 74 in series around the second coil 68b, the auxiliary resistor 74 can act as a voltage divider when the driver chip 71 provides current signals to the first coil 68a and the second coil 68b, thereby reducing the power consumption of the driver chip 71 and consequently reducing the heat generated by the driver chip 71. Thus, the heat generated by the driver chip 71 is less likely to affect surrounding devices (such as the lens assembly 50). Furthermore, since the auxiliary resistor 74 is far from the driver chip 71, the heat sources of the variable aperture 60 are more dispersed, and the heat generated by the auxiliary resistor 74 is less likely to accumulate with the heat generated by the driver chip 71. At this time, the overall heating of the variable aperture 60 is more uniform.

[0230] The fourth implementation method, which shares the same technical content as the first implementation method, will not be described again: Please refer to... Figure 30 , Figure 30 This is a circuit diagram of the driver chip 71, first coil 68a, and second coil 68b shown in this application in another embodiment. The driver chip 71, first coil 68a, and second coil 68b are connected in series. The sum of the voltages of the first coil 68a and the second coil 68b is greater than one-sixth of the supply voltage of the driver chip 71. For example, the supply voltage of the driver chip 71 is 2.8 volts (V). The sum of the voltages of the first coil 68a and the second coil 68b is 1.2 volts (V).

[0231] In one embodiment, the resistance R2 of the second coil 68b is greater than the resistance R1 of the first coil 68a. Specifically, the resistance R2 of the second coil 68b can be increased by increasing the number of turns or decreasing the diameter of the wire in the second coil 68b. For example, the resistance R1 of the first coil 68a is equal to 12.5 ohms (Ω), and the resistance R2 of the second coil 68b is equal to 32.5 ohms (Ω).

[0232] Please refer to Table 2 below. Table 2 is a data table showing the electrical parameters of the variable aperture in this embodiment and the variable aperture in the comparative scheme. The difference between the comparative scheme and this embodiment is that the resistance values ​​of the first coil and the second coil are equal. Specifically, the resistance value of the first coil in the comparative scheme is 12.5 ohms (Ω). The resistance value of the second coil is also 12.5 ohms (Ω). In this embodiment, the resistance value of the first coil is 12.5 ohms (Ω). The resistance value of the second coil is 32.5 ohms (Ω).

[0233] Table 2 is a data table showing the electrical parameters of the variable aperture in this embodiment and the electrical parameters of the variable aperture in the comparative scheme.

[0234]

[0235] As can be understood from the data in the table above, the power consumption of the driver chip 71 in this embodiment is 41.9mW. The power consumption of the driver chip in the comparative solution is 54.4mW. Clearly, the power consumption of the driver chip 71 in this embodiment is lower, and the heat generated by the driver chip 71 is less. In this embodiment, by increasing the resistance value R2 of the second coil 68b, the sum of the voltages of the first coil 68a and the second coil 68b is greater than one-sixth of the supply voltage of the driver chip 71. Therefore, when the driver chip 71 provides current signals to the first coil 68a and the second coil 68b, the first coil 68a and the second coil 68b can receive more voltage, thereby reducing the power consumption of the driver chip 71 and further reducing the heat generated by the driver chip 71. Thus, the heat generated by the driver chip 71 is less likely to affect peripheral devices (such as the lens assembly 50). Furthermore, since the resistance value of the second coil 68b is greater than the resistance value of the first coil 68a, the second coil 68b receives more voltage. Since the second coil 68b is located far from the driver chip 71, the heat generated by the second coil 68b is less likely to increase the temperature of the area where the driver chip 71 is located.

[0236] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A variable aperture (60), characterized in that, The variable aperture (60) includes a fixed base (610), a rotating bracket (63), a first magnet (67a), a first coil (68a), and multiple blades (65). At least a portion of the rotating bracket (63) is located inside the fixed base (610) and is rotatably connected to the fixed base (610). The rotating bracket (63) encloses a space (630). The blade (65) includes a first part (651) and a second part (652) connected to the first part (651). The first part (651) of the blade (65) is connected to the fixed base (610), and the second part (652) of the blade (65) is connected to the rotating bracket (63). A plurality of blades (65) together enclose a light-transmitting hole (650), which communicates with the space (630). The first part (651) has a circular hole, and the second part (652) has an arc-shaped hole. The arc-shaped hole is closer to the light-transmitting hole (650) than the circular hole. The first magnet (67a) is fixedly connected to the outer peripheral side (630a) of the rotating bracket (63), and the first coil (68a) is fixedly connected to the fixed base (610). The first coil (68a) faces the first magnet (67a), and the plane where the winding of the first coil (68a) is located is parallel to the optical axis. The first magnet (67a) is used to drive the rotating bracket (63) to rotate relative to the fixed base (610) when the first coil (68a) is energized. The blades (65) slide relative to the rotating bracket (63) and rotate relative to the fixed base (610). The aperture of the light-transmitting holes (650) of the multiple blades (65) changes.

2. The variable aperture (60) according to claim 1, characterized in that, The polarization direction of the first magnet (67a) is parallel to the circumferential direction of the rotating support (63).

3. The variable aperture (60) according to claim 1, characterized in that, The outer peripheral side (630a) of the rotating bracket (63) is recessed toward the center of the rotating bracket (63) to form a first mounting groove (633), and at least a portion of the first magnet (67a) is fixedly connected to the first mounting groove (633).

4. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The variable aperture (60) also includes a second magnet (67b) and a second coil (68b); The second magnet (67b) is fixedly connected to the outer peripheral side (630a) of the rotating bracket (63), and the second coil (68b) is fixedly connected to the fixed base (610), with the second coil (68b) facing the second magnet (67b). The second magnet (67b) is used to drive the rotating bracket (63) to rotate relative to the fixed base (610) when the second coil (68b) is energized. The direction in which the second magnet (67b) drives the rotating bracket (63) to rotate relative to the fixed base (610) is the same as the direction in which the first magnet (67a) drives the rotating bracket (63) to rotate relative to the fixed base (610).

5. The variable aperture (60) according to claim 4, characterized in that, The second magnet (67b) is symmetrical to the first magnet (67a) about the center of the rotating bracket (63).

6. The variable aperture (60) according to claim 4, characterized in that, The fixing base (610) is provided with a first through hole (6230) and a second through hole (6240) spaced apart. The first through hole (6230) and the second through hole (6240) both form openings on the inner and outer peripheral sides of the fixing base (610). The variable aperture (60) also includes a flexible circuit board (69), which surrounds the outer peripheral side of the fixing base (610) and is fixedly connected to the outer peripheral side of the fixing base (610). The first coil (68a) is fixedly connected to the inner peripheral side of the flexible circuit board (69) and electrically connected to the flexible circuit board (69). The first coil (68a) is located inside the first through hole (6230). The second coil (68b) is fixedly connected to the inner peripheral side of the flexible circuit board (69) and electrically connected to the flexible circuit board (69). The second coil (68b) is located inside the second through hole (6240).

7. The variable aperture (60) according to claim 6, characterized in that, The variable aperture (60) also includes a driver chip (71), which is fixedly connected to the flexible circuit board (69) and electrically connected to the flexible circuit board (69). The driver chip (71) is used to supply power to the first coil (68a) and the second coil (68b).

8. The variable aperture (60) according to claim 7, characterized in that, The driving chip (71), the first coil (68a), and the second coil (68b) are connected in series; The sum of the voltage of the first coil (68a) and the voltage of the second coil (68b) is greater than one-sixth of the power supply voltage of the driver chip (71).

9. The variable aperture (60) according to claim 7, characterized in that, The variable aperture (60) also includes an auxiliary resistor (74), which is fixedly connected to the flexible circuit board (69) and electrically connected to the flexible circuit board (69). The driver chip (71), the first coil (68a), the second coil (68b), and the auxiliary resistor (74) are connected in series.

10. The variable aperture (60) according to claim 9, characterized in that, The auxiliary resistor (74) is located within the area enclosed by the second coil (68b).

11. The variable aperture (60) according to any one of claims 7 to 10, characterized in that, The driving chip (71) is located in the area enclosed by the first coil (68a), and the driving chip (71) is also used to detect the magnetic field strength of the first magnet (67a) at different positions.

12. The variable aperture (60) according to claim 4, characterized in that, The variable aperture (60) further includes a first magnetic plate (72a) and a second magnetic plate (72b), the first magnetic plate (72a) and the second magnetic plate (72b) being fixedly connected to the fixing base (610) at intervals, the first magnetic plate (72a) being located around the first magnet (67a) and the second magnetic plate (72b) being located around the second magnet (67b).

13. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The fixed base (610) has a plurality of spaced rotating columns (621), and the rotating bracket (63) has a plurality of spaced guide columns (631). Each blade (65) is provided with a rotating hole (653) and a guide hole (654) spaced apart. Multiple rotating columns (621) are rotatably connected to the rotating holes (653) of multiple blades (65) in a corresponding manner, and multiple guide columns (631) are slidably connected to the guide holes (654) of multiple blades (65) in a corresponding manner.

14. The variable aperture (60) according to claim 13, characterized in that, The blade (65) is also provided with a first auxiliary hole (666), which is spaced apart from the guide hole (654) and the rotating hole (653) and is located around the guide hole (654).

15. The variable aperture (60) according to claim 13, characterized in that, The blade (65) is also provided with a second auxiliary hole (667), which is spaced apart from the guide hole (654) and the rotating hole (653) and is located around the rotating hole (653).

16. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The variable aperture (60) also includes a gasket (66), which is fixedly connected to the rotating bracket (63) and located on the side of the plurality of blades (65) facing the rotating bracket (63). The gasket (66) has a light-transmitting hole (661), which connects the light-transmitting holes (650) of the plurality of blades (65) with the space (630) of the rotating bracket (63). The variable aperture (60) includes a starting state, an intermediate state, and an ending state; When the variable aperture (60) is in the initial or intermediate state, the maximum aperture of the light-transmitting holes (650) of the plurality of blades (65) is smaller than the aperture of the light-transmitting hole (661) of the gasket (66). When the variable aperture (60) is in the end state, the minimum aperture of the light-transmitting holes (650) of the plurality of blades (65) is greater than or equal to the aperture of the light-transmitting hole (661) of the gasket (66).

17. The variable aperture (60) according to claim 16, characterized in that, Each blade (65) has an inner edge comprising a first segment (655a) and a second segment (655b) connecting the first segment (655a), wherein the first segment (655a) is arc-shaped and the second segment (655b) is straight or arc-shaped. The intermediate states of the variable aperture (60) include a first intermediate state and a second intermediate state; When the variable aperture (60) is in the initial state, the light-transmitting holes (650) of the multiple blades (65) are polygonal in shape, and the light-transmitting holes (650) of the multiple blades (65) are formed by a portion of the first segment (655a) of each blade (65). When the variable aperture (60) is in the first intermediate state, the light-transmitting holes (650) of the multiple blades (65) are circular in shape, and the light-transmitting holes (650) of the multiple blades (65) are formed by the first segment (655a) of each blade (65). When the variable aperture (60) is in the second intermediate state, the light-transmitting holes (650) of the multiple blades (65) are polygonal in shape, and the light-transmitting holes (650) of the multiple blades (65) are formed by a portion of the second segment (655b) of each blade (65).

18. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The variable aperture (60) also includes a ball bearing (64), which is rotatably connected to the fixed base (610) and slidably connected to the rotating bracket (63).

19. The variable aperture (60) according to claim 18, characterized in that, The fixing base (610) includes a base (61) and a fixing bracket (62), the fixing bracket (62) being connected to the top of the base (61); The base (61) is provided with a first groove (613), and the fixed bracket (62) is provided with a second groove (622). The first groove (613) and the second groove (622) are combined to form a rotating groove (6220), and the ball (64) is rotatably connected in the rotating groove (6220). The rotating bracket (63) is also provided with a rolling groove (632), which extends circumferentially along the rotating bracket (63). The rolling groove (632) is arranged opposite to the rotating groove (6220), and the ball (64) is tumblingly connected in the rolling groove (632).

20. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The rotating bracket (63) is located inside the fixed base (610), including the projection of the rotating bracket (63) on the reference plane and the projection of the fixed base (610) on the reference plane, which at least partially coincides with the projection of the fixed base (610) on the reference plane, and the reference plane is parallel to the optical axis direction of the variable aperture (60).

21. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The outer peripheral side (630a) of the rotating bracket (63) is parallel to the optical axis of the variable aperture (60).

22. The variable aperture (60) according to any one of claims 1 to 3, characterized in that, The first coil (68a) faces the first magnet (67a), and both the plane where the first coil (68a) is located and the plane where the first magnet (67a) is located are parallel to the optical axis of the variable aperture (60).

23. A camera module (100), characterized in that, It includes a lens assembly (50) and a variable aperture (60) as claimed in any one of claims 1 to 22, the variable aperture (60) being fixedly connected to the lens assembly (50) and located on the light-incident side of the lens assembly (50).

24. The camera module (100) according to claim 23, characterized in that, The lens assembly (50) includes a motor (51) and a lens (52), the lens (52) being disposed on the motor (51), and the motor (51) being used to drive the lens (52) to move along the optical axis of the camera module (100); The variable aperture (60) is fixedly connected to the lens (52) and is located on the light-incident side of the lens (52).

25. An electronic device (1), characterized in that, It includes a housing (200) and a camera module (100) as described in claim 23 or 24, wherein the camera module (100) is disposed in the housing (200).

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