Variable aperture drive apparatus

Abstract

This invention provides a variable aperture driving device, comprising a housing with a receiving cavity, a stator fixed to the housing and located within the receiving cavity, a mover assembly rotatably connected to the housing and located within the receiving cavity, a blade rotatably connected to the housing and connected to the mover assembly, an elastic member extending circumferentially along the mover assembly and connected at both ends to the mover assembly and the housing respectively, and a guide member disposed between the housing and the mover assembly; the mover assembly and the stator mutually induce each other to generate a driving force to drive the mover assembly to rotate; the stator includes a magnet assembly fixed to the housing; the mover assembly includes a mover body rotatably connected to the housing, a coil fixed to the mover body and sleeved on the magnet assembly, and a magnetic support plate, one end of which is fixed to the mover body and the other end of which is suspended; the magnetic support plate is spaced apart from the magnet assembly and forms a magnetic attraction force with the magnet assembly. The variable aperture driving device of this invention can reduce its driving energy consumption.

Description

Technical Field

[0001] This invention relates to the field of aperture driving technology, and more particularly to a variable aperture driving device. Background Technology

[0002] Smartphones, tablets, cameras, and camcorders have become indispensable electronic products in people's lives. With the continuous development of electronic devices, their functions are becoming increasingly diversified and intelligent.

[0003] In the aforementioned electronic devices, whether as primary or secondary functions, the shooting device has become an indispensable part. The shooting device has various adjustment functions, such as focus adjustment, image stabilization adjustment, and aperture adjustment. Aperture adjustment, in particular, uses a drive mechanism to change the opening and closing size of the aperture blades in the lens, thus creating a variable-sized aperture for light to pass through.

[0004] The variable aperture drive device in the related technology mainly includes a housing, a mover, a stator for driving the mover to rotate, an elastic element that elastically suspends the mover in the housing, a guide element disposed between the housing and the mover, and multiple aperture blades rotatably connected to the housing and connected to the mover. The stator mainly includes a magnet, and the mover mainly includes a mover body and a coil. When the coil is energized, the magnet will induce mutual induction with the coil to drive the mover body to rotate, thereby driving the multiple aperture blades to rotate relative to the housing, so as to adjust the opening and closing size of the aperture blades.

[0005] Although the aforementioned variable aperture drive device can drive multiple aperture blades to open and close, its driving method directly uses magnets and coils, which results in high energy consumption.

[0006] Therefore, it is necessary to provide a new variable aperture driving device to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to provide a new variable aperture driving device to solve the problem of high driving power consumption in related technologies.

[0008] This invention provides a variable aperture driving device, comprising a housing having a receiving cavity, a stator fixed to the housing and located within the receiving cavity, a mover assembly rotatably connected to the housing and located within the receiving cavity, blades rotatably connected to the housing and connected to the mover assembly, an elastic member extending circumferentially along the mover assembly and having its two ends respectively connected to the mover assembly and the housing, and a guide member disposed between the housing and the mover assembly; the mover assembly and the stator mutually sense each other to generate a driving force for rotating the mover assembly; at least three blades are provided, and at least three blades can rotate relative to the housing under the drive of the mover assembly to form a light-transmitting aperture with a variable aperture size; the guide member is used to support the mover assembly to rotate along the optical axis of the light-transmitting aperture;

[0009] The stator includes a magnet assembly fixed to the housing; The moving part assembly includes a moving part body rotatably connected to the housing, a coil fixed to the moving part body and sleeved on the magnet assembly, and a magnetic support plate with one end fixed to the moving part body and the other end suspended. The coil and the magnet assembly are spaced apart, and the magnetic support plate and the magnet assembly are spaced apart along the circumference of the moving part body and form a magnetic attraction force with the magnet assembly during the rotation of the moving part body.

[0010] Preferably, the moving part body is annular; the line connecting the center of the magnetic support sheet and the center of the circle containing the moving part body forms an angle with the plane containing the magnetic support sheet, the angle being greater than 0° and less than 90°.

[0011] Preferably, the housing is annular; the magnet assembly includes a first magnet, a pole core, and a second magnet stacked sequentially along the circumference of the housing; the end of the first magnet away from the pole core is fixed to the housing, and the magnetization directions of the first magnet and the second magnet are perpendicular to the pole core, respectively; the magnetic support sheet is arranged at intervals with the magnet assembly along the circumference of the housing and is positioned opposite to it, with the magnetic support sheet being closer to the first magnet than the second magnet.

[0012] Preferably, the magnet assembly, the coil, and the magnetic support sheet each comprise two; the two magnet assemblies are arranged symmetrically about the optical axis of the light-transmitting hole, the two coils are respectively sleeved on the two magnet assemblies, the two magnetic support sheets are arranged symmetrically about the optical axis of the light-transmitting hole, and each magnetic support sheet is directly opposite one of the magnet assemblies.

[0013] Preferably, the housing includes an annular base plate, a first side plate extending from the outer periphery of the base plate along the optical axis of the light-transmitting hole, a second side plate extending from the inner periphery of the base plate along the optical axis and also in an annular shape, and a top plate covering and fixed to the first side plate and the second side plate; the base plate, the first side plate, the second side plate, and the top plate together form the receiving cavity; the magnet assembly is fixed to the first side plate, and the guide is disposed between the second side plate and the moving body.

[0014] Preferably, the moving part body includes a rotating part that is rotatably supported on the top plate and is in the shape of an annulus, a fixing part that extends from the outer periphery of the rotating part toward the bottom plate, and a limiting part that extends from the inner periphery of the rotating part toward the bottom plate; the magnetic support piece is fixed to the side of the fixing part near the bottom plate, and the guide is disposed between the second side plate and the limiting part.

[0015] Preferably, the guide is a ball bearing; the side of the second side plate away from the bottom plate is recessed towards the bottom plate to form a first limiting groove, and the side of the limiting part away from the rotating part is recessed towards the rotating part to form a second limiting groove that matches the first limiting groove; the ball bearing is disposed in the matching first limiting groove and second limiting groove.

[0016] Preferably, the first side plate includes a plurality of first side plates, which are spaced apart along the circumference of the housing; the housing also includes two clearance holes formed through the second side plate in a direction perpendicular to the optical axis and arranged axially symmetrically, and two first support portions extending from the outer periphery of the bottom plate in the direction of the optical axis and arranged axially symmetrically, each first support portion being located between the two first side plates and spaced apart from the first side plates. The moving part body also includes two second support parts that extend from the inner circumference of the rotating part toward the base plate and are arranged axially symmetrically. Each second support part extends into one of the clearance holes and is spaced apart from the second side plate. The elastic element includes two, which are arranged at intervals along the circumference of the base plate; each elastic element includes a first fixed arm fixed to one of the first support portions, a second fixed arm fixed to one of the second support portions, and a spring arm that bends and extends from the first fixed arm to the second fixed arm and forms a fixed connection with the second fixed arm.

[0017] Preferably, the magnetic support plate includes a first magnetic portion fixed to the fixing part and in the shape of a rectangular plate, a second magnetic portion extending from the side of the first magnetic portion away from the fixing part in a direction away from the fixing part and also in the shape of a rectangular plate, and a relief groove recessed from the side of the second magnetic portion near the spring arm in a direction away from the spring arm, the relief groove penetrating the second magnetic portion circumferentially along the base plate; the spring arm extends through the relief groove to the second fixing arm.

[0018] Preferably, the variable aperture driving device further includes a first flexible circuit board and a second flexible circuit board that are electrically connected to the coil respectively; the first flexible circuit board is attached and fixed to the mover assembly, and the second flexible circuit board is attached and fixed to the housing.

[0019] Compared with related technologies, the variable aperture driving device of the present invention provides a magnetic support plate on the moving body, and limits the magnetic support plate and the magnet assembly to be spaced apart along the circumference of the moving body and to form a magnetic attraction force with the magnet assembly during the rotation of the moving body. In this way, when the aperture of the light-transmitting hole needs to be changed, that is, when the moving body rotates, the magnetic attraction force formed by the magnetic support plate and the magnet assembly can enhance the driving force for the moving body to rotate, thereby reducing the driving force required for the moving body to rotate and thus reducing the driving energy consumption of the variable aperture driving device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural schematic diagram of the variable aperture driving device provided in an embodiment of the present invention; Figure 2 A partially exploded structural diagram of the variable aperture driving device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the variable aperture driving device provided in an embodiment of the present invention after removing the top plate, the mover body, the blades, the first flexible circuit board, and some of the guide components. Figure 4 This is a schematic diagram of the structure of the variable aperture driving device provided in an embodiment of the present invention after removing the base plate, the first side plate, the second side plate, the second flexible circuit board, and some guide components. Figure 5 This is a planar schematic diagram of the variable aperture driving device provided in an embodiment of the present invention after removing the top plate and blades.

[0021] Among them, 100, variable aperture drive device; 1, housing; 10, receiving cavity; 11, bottom plate; 12, first side plate; 13, second side plate; 131, first limiting groove; 14, top plate; 15, clearance hole; 16, first support part; 2, stator; 21, magnet assembly; 211, first magnet; 212, pole core; 213, second magnet; 3, mover assembly; 31, mover body; 311, rotating part; 31 2. Fixing part; 313. Limiting part; 3131. Second limiting groove; 314. Second supporting part; 32. Coil; 33. Magnetic support piece; 331. First magnetic part; 332. Second magnetic part; 333. Clearance groove; 4. Blade; 40. Light transmission hole; 5. Elastic element; 51. First fixing arm; 52. Second fixing arm; 53. Elastic arm; 6. Guide element; 7. First flexible circuit board; 8. Second flexible circuit board. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides a variable aperture driving device 100, combined with... Figures 1 to 5 As shown, it includes a housing 1 having a receiving cavity 10, a stator 2 fixed to the housing 1 and located within the receiving cavity 10, a mover assembly 3 rotatably connected to the housing 1 and located within the receiving cavity 10, a blade 4 rotatably connected to the housing 1 and connected to the mover assembly 3, an elastic member 5 extending circumferentially along the mover assembly 3 and having its two ends respectively connected to the mover assembly 3 and the housing 1, and a guide member 6 disposed between the housing 1 and the mover assembly 3.

[0024] The variable aperture drive device 100 is circular, and correspondingly, the housing 1 and the mover body 31 are annular, providing a light-transmitting channel for the light-transmitting hole 40 of the variable aperture drive device 100. Figure 1 As shown, the optical axis of the light-transmitting aperture 40 is the B-axis.

[0025] The housing 1 includes a ring-shaped base plate 11, a first side plate 12 extending from the outer periphery of the base plate 11 along the optical axis of the light-transmitting hole 40, a second side plate 13 extending from the inner periphery of the base plate 11 along the optical axis of the light-transmitting hole 40 and also in a ring shape, and a top plate 14 covering and fixed to the first side plate 12 and the second side plate 13; the base plate 11, the first side plate 12, the second side plate 13, and the top plate 14 together form a receiving cavity 10; a guide member 6 is disposed between the second side plate 13 and the mover body 31. This design provides corresponding installation positions for the stator 2, the mover assembly 3, the blades 4, the elastic member 5, and the guide member 6.

[0026] The housing 1 also includes two clearance holes 15 formed through the second side plate 13 in a direction perpendicular to the optical axis and arranged axially symmetrically, and two first support portions 16 extending from the outer periphery of the base plate 11 in the direction of the optical axis and arranged axially symmetrically.

[0027] In this embodiment, the first side plate 12 includes multiple first side plates 12, which are spaced apart along the circumference of the housing 1; each first support portion 16 is located between two first side plates 12 and spaced apart from the first side plates 12. This design can avoid interference between the first side plates 12 and the first support portions 16.

[0028] The stator 2 includes a magnet assembly 21 fixed to the housing 1. The magnet assembly 21 includes a first magnet 211, a pole core 212, and a second magnet 213 stacked sequentially along the circumference of the housing 1. The end of the first magnet 211 away from the pole core 212 is fixed to the housing 1, and the magnetization directions of the first magnet 211 and the second magnet 213 are perpendicular to the pole core 212, respectively. Specifically, the first magnet 211 fixes the first side plate 12 of the housing 1. This design can improve the magnetic effect of the magnet assembly 21.

[0029] The mover assembly 3 includes a mover body 31 rotatably connected to the housing 1, a coil 32 fixed to the mover body 31 and sleeved on the magnet assembly 21, and a magnetic support plate 33 with one end fixed to the mover body 31 and the other end suspended. The coil 32 and the magnet assembly 21 are spaced apart, and the magnetic support plate 33 and the magnet assembly 21 are spaced apart along the circumference of the mover body 31 and form a magnetic attraction force with the magnet assembly 21 during the rotation of the mover body 31.

[0030] The moving part body 31 includes a rotating part 311 that is rotatably supported on the top plate 14 and is in the shape of an annulus, a fixing part 312 that extends from the outer periphery of the rotating part 311 toward the bottom plate 11, and a limiting part 313 that extends from the inner periphery of the rotating part 311 toward the bottom plate 11. A magnetic support piece 33 is fixed to the fixing part 312 on the side near the bottom plate 11, and a guide 6 is disposed between the second side plate 13 and the limiting part 313. This design facilitates the installation of the magnetic support piece 33 and the guide 6.

[0031] Specifically, the magnetic support plate 33 and the magnet assembly 21 are arranged at intervals along the circumference of the housing 1 and are positioned opposite each other, with the magnetic support plate 33 being closer to the first magnet 211 than the second magnet 213. This design allows the magnetic support plate 33 to better form a magnetic attraction with the magnet assembly 21, thus enhancing the magnetic attraction between the two.

[0032] like Figure 5 As shown, the line connecting the center of the magnetic support plate 33 and the center of the circle containing the mover body 31 forms an angle A with the plane containing the magnetic support plate 33. The angle A is greater than 0° and less than 90°. This design can reduce the radial component of the stiffness of the magnetic support plate 33.

[0033] In this embodiment, there are two magnet assemblies 21, two coils 32, and two magnetic support plates 33. The two magnet assemblies 21 are symmetrically arranged about the optical axis of the light-transmitting hole 40. The two coils 32 are respectively sleeved on the two magnet assemblies 21. The two magnetic support plates 33 are symmetrically arranged about the optical axis of the light-transmitting hole 40, and each magnetic support plate 33 is directly opposite one of the magnet assemblies 21. This design can increase the magnetic attraction between the magnetic support plates 33 and the magnet assemblies 21. Of course, according to actual needs, the magnet assemblies 21, the coils 32, and the magnetic support plates 33 can also be designed in the same number of three, four, five, etc., but the arrangement of the magnet assemblies 21, the coils 32, and the magnetic support plates 33 needs to be adjusted accordingly.

[0034] The moving part body 31 also includes two second support parts 314 that extend from the inner periphery of the rotating part 311 toward the base plate 11 and are arranged axially symmetrically. Each second support part 314 extends into one of the clearance holes 15 and is spaced apart from the second side plate 13. This design facilitates the installation of the elastic element 5.

[0035] The mover assembly 3 and the stator 2 sense each other to generate a driving force that drives the mover assembly 3 to rotate; at least three blades 4 are provided, and at least three blades 4 can rotate relative to the housing 1 under the drive of the mover assembly 3 to form a light-transmitting hole 40 with a variable aperture. This design allows the magnet assembly 21 of the stator 2 and the coil 32 of the mover to sense each other to generate the driving force required to drive the blades 4 to rotate.

[0036] In this embodiment, the blades 4 include six blades. Of course, depending on actual needs, the blades 4 can also be designed to have three, four, five, seven, etc.

[0037] The elastic element 5 comprises two elements, which are arranged at intervals along the circumference of the base plate 11. Each elastic element 5 includes a first fixed arm 51 fixed to one of the first support portions 16, a second fixed arm 52 fixed to one of the second support portions 314, and a spring arm 53 that bends and extends from the first fixed arm 51 to the second fixed arm 52 and forms a fixed connection with the second fixed arm 52. This design can better elastically support the moving part assembly 3 on the housing 1 and improve the elastic force of the elastic element 5.

[0038] In this embodiment, the magnetic support plate 33 includes a first magnetic part 331 fixed to the fixing part 312 and in the shape of a rectangular plate, a second magnetic part 332 extending from the side of the first magnetic part 331 away from the fixing part 312 in a direction away from the fixing part 312 and also in the shape of a rectangular plate, and a relief groove 333 recessed from the side of the second magnetic part 332 near the spring arm 53 in a direction away from the spring arm 53. The relief groove 333 also penetrates the second magnetic part 332 circumferentially along the base plate 11. The spring arm 53 extends through the relief groove 333 to the second fixing arm 52. This design not only increases the connection area between the magnetic support plate 33 and the fixing part 312 through the first magnetic part 331 to make the connection between the two more stable, but also allows the spring arm 53 to be avoided through the relief groove 333, thereby reducing the overall area of ​​the variable optical drive drive device.

[0039] The guide 6 is used to support the rotation of the moving part assembly 3 along the optical axis of the light-transmitting hole 40; the guide 6 can be a ball, roller, arc-shaped component, etc.

[0040] In this embodiment, the guide member 6 includes four members, and all four guide members 6 are ball bearings. The side of the second side plate 13 away from the bottom plate 11 is recessed towards the bottom plate 11 to form a first limiting groove 131. The side of the limiting part 313 away from the rotating part 311 is recessed towards the rotating part 311 to form a second limiting groove 3131 that matches the first limiting groove 131. The ball bearings are disposed in the matching first limiting groove 131 and second limiting groove 3131. This design allows the guide member 6 to be better positioned between the housing 1 and the moving part assembly 3, thereby improving the guiding effect of the guide member 6.

[0041] Of course, depending on actual needs, the number of guide components 6 can be adjusted to one, two, three, five, etc.

[0042] The variable aperture drive device 100 also includes a first flexible circuit board 7 and a second flexible circuit board 8 that are electrically connected to the coil 32 respectively; the first flexible circuit board 7 is attached and fixed to the mover assembly 3, and the second flexible circuit board 8 is attached and fixed to the base plate 11 of the housing 1. This design can better introduce external electrical signals to the coil 32.

[0043] Specifically, the first flexible circuit board 7 is attached and fixed to the side of the rotating part 311 near the base plate 11; the second flexible circuit board 8 is attached and fixed to the side of the base plate 11 away from the moving part assembly 3, and part of the outer periphery of the second flexible circuit board 8 is attached to the base plate 11 and bent and extended to the side of the base plate 11 near the moving part assembly 3.

[0044] The first flexible circuit board 7 can be directly electrically connected to the coil 32, or indirectly electrically connected to the coil 32 through one of the elastic elements 5; the second flexible circuit board 8 can be directly electrically connected to the coil 32, or indirectly electrically connected to the coil 32 through another elastic element 5.

[0045] like Figure 5 As shown, the rotation direction of the moving part assembly 3 is the X direction, the magnetization direction of the first magnet 211 is the Y direction, and the magnetization direction of the second magnet 213 is the Z direction.

[0046] In this embodiment, when the aperture of the light-transmitting hole 40 needs to be changed, i.e., when the mover body 31 rotates, the coil 32 is energized and interacts with the magnet assembly 21 to generate a driving force that drives the mover assembly 3 to rotate. The magnetic support plate 33 will then rotate accordingly. That is, from the initial state to the process of the magnetic support plate 33 rotating with the mover body 31, the magnetic attraction force formed between the magnetic support plate 33 and the corresponding magnet assembly 21 gradually increases. That is, taking the initial state to the start of rotation as a reference, the magnetic support plate 33 is behind the magnet assembly 21 along the rotation direction of the mover body 31 during this process.

[0047] Compared with related technologies, the variable aperture driving device 100 in this embodiment provides a magnetic support plate 33 on the mover body 31, and limits the magnetic support plate 33 and the magnet assembly 21 to be spaced apart along the circumference of the mover body 31 and form a magnetic attraction force with the magnet assembly 21 during the rotation of the mover body 31. In this way, when the aperture of the light-transmitting hole 40 needs to be changed, that is, when the mover body 31 rotates, the magnetic attraction force formed by the magnetic support plate 33 and the magnet assembly 21 can enhance the driving force for driving the mover assembly 3 to rotate, thereby reducing the driving force required for the rotation of the mover assembly 3 and thus reducing the driving energy consumption of the variable aperture driving device 100.

[0048] The above are merely embodiments of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A variable aperture driving device, comprising a housing having a receiving cavity, a stator fixed to the housing and located within the receiving cavity, a mover assembly rotatably connected to the housing and located within the receiving cavity, blades rotatably connected to the housing and connected to the mover assembly, an elastic member extending circumferentially along the mover assembly and having its two ends respectively connected to the mover assembly and the housing, and a guide member disposed between the housing and the mover assembly; the mover assembly and the stator mutually sense each other to generate a driving force for rotating the mover assembly; the blades are provided with at least three, and at least three of the blades are rotatable relative to the housing under the drive of the mover assembly to form a light-transmitting aperture with a variable aperture size; the guide member is used to support the mover assembly to rotate along the optical axis of the light-transmitting aperture; characterized in that, The stator includes a magnet assembly fixed to the housing; The moving part assembly includes a moving part body rotatably connected to the housing, a coil fixed to the moving part body and sleeved on the magnet assembly, and a magnetic support plate with one end fixed to the moving part body and the other end suspended. The coil and the magnet assembly are spaced apart, and the magnetic support plate and the magnet assembly are spaced apart along the circumference of the moving part body and form a magnetic attraction force with the magnet assembly during the rotation of the moving part body.

2. The variable aperture driving device as described in claim 1, characterized in that, The moving part body is in the shape of a ring; the line connecting the center of the magnetic support plate and the center of the circle in which the moving part body is located forms an angle with the plane in which the magnetic support plate is located, and the angle is greater than 0° and less than 90°.

3. The variable aperture driving device as described in claim 2, characterized in that, The housing is annular; the magnet assembly includes a first magnet, a pole core, and a second magnet stacked sequentially along the circumference of the housing; the end of the first magnet away from the pole core is fixed to the housing, and the magnetization directions of the first magnet and the second magnet are perpendicular to the pole core, respectively; the magnetic support sheet is arranged at intervals with the magnet assembly along the circumference of the housing and is positioned opposite to it, with the magnetic support sheet being closer to the first magnet than the second magnet.

4. The variable aperture driving device as described in claim 1, characterized in that, The magnet assembly, the coil, and the magnetic support sheet are each comprised of two; the two magnet assemblies are arranged symmetrically about the optical axis of the light-transmitting hole, the two coils are respectively sleeved on the two magnet assemblies, the two magnetic support sheets are arranged symmetrically about the optical axis of the light-transmitting hole, and each magnetic support sheet is respectively arranged facing one of the magnet assemblies.

5. The variable aperture driving device as described in claim 1, characterized in that, The housing includes a ring-shaped base plate, a first side plate extending from the outer periphery of the base plate along the optical axis of the light-transmitting hole, a second side plate extending from the inner periphery of the base plate along the optical axis and also in a ring shape, and a top plate covering and fixed to the first side plate and the second side plate; the base plate, the first side plate, the second side plate, and the top plate together form the receiving cavity; the magnet assembly is fixed to the first side plate, and the guide is disposed between the second side plate and the moving body.

6. The variable aperture driving device as described in claim 5, characterized in that, The moving part includes a rotating part that is rotatably supported on the top plate and is in the shape of an annulus, a fixing part that extends from the outer periphery of the rotating part toward the bottom plate, and a limiting part that extends from the inner periphery of the rotating part toward the bottom plate; the magnetic support piece is fixed to the side of the fixing part near the bottom plate, and the guide is disposed between the second side plate and the limiting part.

7. The variable aperture driving device as described in claim 6, characterized in that, The guide component is a ball bearing; the side of the second side plate away from the bottom plate is recessed towards the bottom plate to form a first limiting groove, and the side of the limiting part away from the rotating part is recessed towards the rotating part to form a second limiting groove that matches the first limiting groove; the ball bearing is disposed in the matching first limiting groove and second limiting groove.

8. The variable aperture driving device as described in claim 6, characterized in that, The first side plate includes a plurality of first side plates, which are spaced apart along the circumference of the housing; the housing also includes two clearance holes formed through the second side plate in a direction perpendicular to the optical axis and arranged axially symmetrically, and two first support portions extending from the outer periphery of the bottom plate in the direction of the optical axis and arranged axially symmetrically, each first support portion being located between the two first side plates and spaced apart from the first side plates. The moving part body also includes two second support parts that extend from the inner circumference of the rotating part toward the base plate and are arranged axially symmetrically. Each second support part extends into one of the clearance holes and is spaced apart from the second side plate. The elastic element includes two, which are arranged at intervals along the circumference of the base plate; each elastic element includes a first fixed arm fixed to one of the first support portions, a second fixed arm fixed to one of the second support portions, and a spring arm that bends and extends from the first fixed arm to the second fixed arm and forms a fixed connection with the second fixed arm.

9. The variable aperture driving device as described in claim 8, characterized in that, The magnetic support plate includes a first magnetic part fixed to the fixing part and in the shape of a rectangular plate, a second magnetic part extending from the side of the first magnetic part away from the fixing part in a direction away from the fixing part and also in the shape of a rectangular plate, and a relief groove recessed from the side of the second magnetic part near the spring arm in a direction away from the spring arm. The relief groove passes through the second magnetic part circumferentially along the base plate. The spring arm extends through the relief groove to the second fixing arm.

10. The variable aperture driving device as described in claim 1, characterized in that, The variable aperture driving device further includes a first flexible circuit board and a second flexible circuit board that are electrically connected to the coil respectively; the first flexible circuit board is attached and fixed to the moving part assembly, and the second flexible circuit board is attached and fixed to the housing.

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