Variable aperture and stack-type center-aligned assembly method therefor

Abstract

A variable aperture and a stack-type center-aligned assembly method for a variable aperture. The variable aperture comprises a base assembly (10), a blade rotating assembly (20), and a driving assembly (30). The base assembly (10) comprises a base (11), a circuit board (12), and a fixing support (13); the circuit board (12) is stacked above the base (11); the fixing support (13) comprises a support cylinder (131) and extension blocks (132) extending outward from the bottom portion of the support cylinder (131); each extension block (132) is stacked above the base (11); the blade rotating assembly (20) comprises a rotating support (21) and multiple blades (22); the rotating support (21) is rotatably sleeved on the top portion of the support cylinder (131); the outer ends of the blades (22) are rotatably mounted on the top portion of the rotating support (21) separately, the middle portions are slidably connected to the top portion of the support cylinder (131), and the inner ends enclose and form an aperture hole (100) at the top portion of the support cylinder (131); the driving assembly (30) is located between the rotating support (21) and the circuit board (12) in the height direction, and is used for driving the rotating support (21) to rotate, so as to change the aperture of the aperture hole (100) enclosed and formed by the inner ends of the blades (22).

Description

Variable aperture and its stacked centering assembly method Technical Field

[0001] This invention relates to the field of camera modules, and in particular to a variable aperture and a stacked concentric assembly method thereof. Background Technology

[0002] Users frequently need to capture images using the cameras of portable electronic devices such as mobile phones under varying brightness conditions. To ensure image quality, a variable aperture is required for the camera. This variable aperture controls the amount of light entering the camera by adjusting the aperture opening size. In high-brightness environments, the variable aperture can narrow the aperture opening to reduce light intake, while in low-brightness environments, it can widen the aperture opening to increase light intake. Understandably, precisely controlling the aperture opening size of this variable aperture is crucial for maintaining image quality. For the industry, improving the control precision of the aperture opening size while minimizing the overall size of the variable aperture is a pressing technical challenge. Summary of the Invention

[0003] One object of the present invention is to provide a variable aperture and a stacked concentric assembly method thereof, wherein the aperture of the variable aperture can be precisely controlled to precisely control the amount of light entering.

[0004] One object of the present invention is to provide a variable aperture and a stacked centering assembly method thereof, wherein the variable aperture is assembled using a stacked centering assembly method to ensure that the rotation center of the variable aperture is consistent with the mechanical center of the base and the mechanical center of the circuit board, thereby improving the accuracy of the aperture diameter of the variable aperture control aperture.

[0005] One object of the present invention is to provide a variable aperture and a stacked alignment assembly method thereof, wherein there is a calibration margin between the extension block of the fixed bracket of the variable aperture and the locking protrusion of the base, and the fixed bracket can be actively calibrated during assembly to ensure that the rotation center of the variable aperture is consistent with the mechanical center of the base and the mechanical center of the circuit board.

[0006] According to one aspect of the present invention, a variable aperture is provided, wherein the variable aperture has an aperture hole with an adjustable aperture size, the aperture hole of the variable aperture being used to adjust the amount of light entering on the incident light side of an optical lens, wherein the variable aperture includes:

[0007] A base assembly includes a base, a circuit board, and a mounting bracket, the circuit board being stacked on top of the base, and the mounting bracket including a bracket cylinder and an extension block extending outward from the bottom of the bracket cylinder, the extension block being stacked on top of the base.

[0008] A blade rotation assembly includes a rotating bracket and multiple blades. The rotating bracket is rotatably fitted onto the top of a bracket cylinder. Each blade is rotatably mounted on the top of the rotating element and slidably connected to the top of the bracket cylinder. The inner ends of each blade form the aperture at the top of the bracket cylinder.

[0009] A drive assembly, located along the height direction between the rotating bracket and the circuit board, wherein the drive assembly is used to drive the rotating bracket to rotate relative to the bracket cylinder, and the rotating bracket drives the blades to slide relative to the bracket cylinder while driving the blades to rotate, so as to change the aperture of the aperture formed by the inner ends of the blades.

[0010] According to one embodiment of the present invention, the driving assembly includes at least one pair of non-arc coils and at least one pair of driving magnets, the coils being disposed on the circuit board, the driving magnets being disposed on the rotating bracket, and the positions of the coils and the positions of the driving magnets corresponding in the height direction.

[0011] According to one embodiment of the present invention, the driving assembly includes at least one pair of coils and at least one pair of strip-shaped driving magnets, the coils being disposed on the circuit board, the driving magnets being disposed on the rotating bracket, and the positions of the coils and the positions of the driving magnets corresponding in the height direction.

[0012] According to one embodiment of the present invention, the driving assembly includes three pairs of coils and three pairs of driving magnets. Two of the coils in the first pair are symmetrically arranged, and the line of symmetry is a line perpendicular to the length direction of the circuit board and passing through the center of the circuit board through hole. The second pair of coils and the third pair of coils are symmetrical with respect to the line of symmetry. Each pair of driving magnets is respectively arranged on the rotating bracket along the circumferential direction of the rotating bracket, and the positions of each pair of coils and the positions of each pair of driving magnets correspond in the height direction.

[0013] According to one embodiment of the present invention, the rotational torque of the first pair of coils falls on the boundary line between the first quadrant and the fourth quadrant, the rotational torque of the second pair of coils falls on the third quadrant, and the rotational torque of the third pair of coils falls on the fourth quadrant.

[0014] According to one embodiment of the present invention, the rotational torque of each pair of coils falls on the center of the circuit board through hole of the circuit board.

[0015] According to one embodiment of the present invention, the base has at least a pair of spaced-apart protrusions and a slot formed between the pair of protrusions, wherein the extension block of the fixing bracket is engaged in the slot of the base.

[0016] According to one embodiment of the present invention, the size of the slot of the base is larger than the size of the extension block of the fixed bracket. After the extension block of the fixed bracket is engaged in the slot of the base, the fixed bracket is allowed to rotate to actively calibrate the assembly position of the fixed bracket.

[0017] According to one embodiment of the present invention, there is a calibration margin of 0.5°-1° between the cam of the base and the extension block of the fixing bracket.

[0018] According to one embodiment of the present invention, the extended block of the fixed bracket has a first track groove, and the rotating bracket has a second track groove. In the height direction, the position of the first track groove of the extended block and the position of the second track groove of the rotating bracket correspond. The blade rotating assembly includes a ball bearing, the bottom of which is rotatably received in the first track groove of the extended block, and the top of which is rotatably received in the second track groove of the rotating bracket.

[0019] According to one embodiment of the present invention, the support cylinder of the fixed bracket includes a lower cylinder and an upper cylinder, the extension block is disposed on the lower cylinder, and after the rotating bracket is fitted onto the top of the lower cylinder, the bottom of the upper cylinder is installed on the bottom of the lower cylinder, and the outer edge of the upper cylinder and the inner edge of the rotating bracket have an overlapping portion in the height direction.

[0020] According to one embodiment of the present invention, the lower cylinder has a first step and the upper cylinder has a second step. The first step of the lower cylinder and the second step of the upper cylinder interlock to form an anti-overflow adhesive structure. Adhesive is used to bond the lower cylinder and the upper cylinder at the first step of the lower cylinder and the second step of the upper cylinder.

[0021] According to another aspect of the present invention, the present invention further provides a method for stacked concentric assembly of a variable aperture, wherein the stacked concentric assembly method includes the following steps:

[0022] After identifying the center of the circuit board through hole and the center of the base through hole respectively, the circuit board body of the circuit board is stacked on top of the base with the center of the circuit board through hole and the center of the base through hole aligned.

[0023] After identifying the center of the through hole in the support cylinder of the fixed bracket, the outer extension block of the fixed bracket is stacked on top of the base with the center of the through hole in the cylinder aligned with the center of the through hole in the base.

[0024] Allowing the bottom of the ball to be received in the first track groove of the extension block of the fixed bracket;

[0025] The rotating bracket is rotatably mounted on the top of the bracket cylinder with the center of the bracket through hole aligned with the center of the cylinder through hole. The top of the ball bearing is housed in the second track groove of the rotating bracket. The position of the driving magnet on the rotating bracket and the position of the coil on the circuit board body correspond in the height direction.

[0026] The outer ends of each blade are rotatably mounted on the top of the rotating bracket, and the middle part is slidably connected to the top of the bracket cylinder, so that the inner ends of each blade form the aperture of the variable aperture above the through hole of the bracket cylinder.

[0027] According to an embodiment of the present invention, in the above method, the center of the circuit board through hole of the circuit board is identified by using the circuit board through hole as a positioning part.

[0028] According to one embodiment of the present invention, in the above method, the center of the circuit board through hole is fitted by the three clearance slots of the circuit board.

[0029] According to an embodiment of the present invention, in the above method, the center of the through hole of the support cylinder is fitted by the first track groove of the three said extension blocks.

[0030] The variable aperture of the present invention has at least the following beneficial effects:

[0031] First, in the height direction, the drive component is located between the circuit board and the rotating bracket, which helps to reduce the length and width dimensions occupied by the drive component, thereby reducing the length and width dimensions of the variable aperture.

[0032] Secondly, the coil of the driving component is a non-circular arc-shaped coil, which helps to reduce the difficulty of forming the coil;

[0033] Third, the rotational torque of the first pair of coils of the driving component falls on the boundary line between the first quadrant and the second quadrant, the rotational torque of the second pair of coils falls on the third quadrant, and the rotational torque of the third pair of coils falls on the fourth quadrant. That is, the rotational torque of the three pairs of coils falls on different quadrants, ensuring that the driving force center of these coils is consistent with the center of the circuit board through hole of the circuit board, thereby reducing the problem of excessive force and easy deformation of the circuit board caused by the same resultant force component being too concentrated in a certain quadrant.

[0034] Fourth, the driving magnet is a strip magnet, which allows for a further increase in size while avoiding breakage of the driving magnet. This not only helps to further reduce the gap between the driving magnet and the coil, but also increases the magnetic field strength of the driving magnet, reduces the current required to drive the rotating bracket to rotate, and lowers the power consumption of the variable aperture.

[0035] Fifth, the variable aperture is assembled using a stacked, aligned assembly method to ensure that the rotation center of the variable aperture is consistent with the mechanical center of the base and the mechanical center of the circuit board, thereby improving the accuracy of the aperture diameter of the variable aperture control aperture.

[0036] Sixth, there is a calibration margin between the protrusions of the outer extension block of the fixed bracket and the base, so that the fixed bracket can be actively calibrated during assembly to ensure that the rotation center of the variable aperture is consistent with the mechanical center of the base and the mechanical center of the circuit board.

[0037] Other beneficial effects of the variable aperture of the present invention will be further disclosed and described in the following description. Attached Figure Description

[0038] Figure 1 is a perspective view of one of the assembly processes of a variable aperture according to a preferred embodiment of the present invention.

[0039] Figure 2 is a perspective view of the second assembly process of the variable aperture according to the above-described preferred embodiment of the present invention.

[0040] Figure 3 is a perspective view of the assembly process of the variable aperture according to the above-described preferred embodiment of the present invention.

[0041] Figure 4 is a perspective view of the fourth assembly process of the variable aperture according to the above-described preferred embodiment of the present invention.

[0042] Figure 5 is a perspective view of the fifth assembly process of the variable aperture according to the above-described preferred embodiment of the present invention.

[0043] Figure 6 is a perspective view of the sixth assembly process of the variable aperture according to the above-described preferred embodiment of the present invention.

[0044] Figure 7 is a perspective view of the seventh assembly process of the variable aperture according to the above-described preferred embodiment of the present invention.

[0045] Figures 8 and 9 are perspective schematic diagrams of the assembly process of the variable aperture according to the above-described preferred embodiment of the present invention, respectively showing the three-dimensional state of the variable aperture from different perspectives.

[0046] Figure 10 is a cross-sectional schematic diagram of one position of the variable aperture according to the above-described preferred embodiment of the present invention.

[0047] Figure 11 is a cross-sectional schematic diagram of another position of the variable aperture according to the above-described preferred embodiment of the present invention.

[0048] Figure 12 is an exploded view of the variable aperture according to the above-described preferred embodiment of the present invention.

[0049] Figure 13 is an exploded schematic diagram from another perspective of the variable aperture according to the above-described preferred embodiment of the present invention.

[0050] Figure 14 is a schematic diagram of the structural relationship between a circuit board and a coil of the variable aperture according to the above preferred embodiment of the present invention.

[0051] Figure 15 is a schematic diagram of a partial position of the variable aperture according to the above-described preferred embodiment of the present invention.

[0052] Figures 16 and 17 are perspective views of a variable aperture from different angles according to another preferred embodiment of the present invention.

[0053] Figure 18 is a cross-sectional schematic diagram of one position of the variable aperture according to the above-described preferred embodiment of the present invention.

[0054] Figure 19 is a cross-sectional schematic diagram of another position of the variable aperture according to the above-described preferred embodiment of the present invention.

[0055] Figure 20 is an exploded view of the variable aperture according to the above-described preferred embodiment of the present invention.

[0056] Figure 21 is an exploded view of the variable aperture according to the above-described preferred embodiment of the present invention from another perspective.

[0057] In the diagram: 100, Variable aperture; 10, Base assembly; 11, Base; 111, Base through hole; 112, Snap protrusion; 113, Snap slot; 114, Boss; 115, Conductive part; 12, Circuit board; 121, Circuit board through hole; 122, Clearance groove; 123, Circuit board body; 1231, Board perforation; 124, First extension plate; 125, Second extension plate; 126, First external circuit board; 127, Second external circuit board; 13, Fixed bracket; 131, Bracket cylinder; 1310, Groove; 1311, Cylinder through hole; 1312, Guide post; 1313, Second support surface; 1314, Lower cylinder; 13141, First step; 1315, Upper cylinder; 13151, Second step; 132, Extension block; 1321, First track groove; 20. Blade rotation assembly; 21. Rotating bracket; 211. Bracket through hole; 212. Second track groove; 213. Magnet mounting groove; 214. Rotating column; 215. First support surface; 216. Limiting boss; 22. Blade; 221. Rotating hole; 222. Guide groove; 23. Ball bearing; 24. Magnetic sheet; 30. Drive assembly; 31. Coil; 32. Drive magnet; 40. Light-shielding ring; 41. Clearance groove; 50. Cover; 51. Cover perforation; 52. Clearance passage. Detailed Implementation

[0058] Before detailing any embodiment of the invention, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention can have other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising,” “including,” or “having,” and variations thereof is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0059] Furthermore, firstly, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0060] Referring to Figures 1 to 15 of the accompanying drawings of this invention, a preferred embodiment of a variable aperture will be disclosed and described below. This variable aperture has an aperture hole 100 with an adjustable aperture size. The aperture hole 100 is used to adjust the amount of light entering the camera's optical lens. In high-brightness environments, the aperture of the variable aperture hole 100 can be reduced to decrease the amount of light entering the camera. In low-brightness environments, the aperture of the variable aperture hole 100 can be increased to increase the amount of light entering the camera. Thus, the variable aperture helps improve the image quality of the camera.

[0061] Figures 1 to 15 illustrate the specific structure of a first embodiment of the variable aperture, wherein the variable aperture includes a base assembly 10, a blade rotation assembly 20, and a drive assembly 30. The base assembly 10 includes a base 11, a circuit board 12, and a fixing bracket 13. The circuit board 12 is stacked on top of the base 11. The fixing bracket 13 includes a bracket cylinder 131 and a set of extension blocks 132 extending outward from the bottom of the bracket cylinder 131. Each of the extension blocks 132 is stacked on top of the base 11. The blade rotation assembly 20 includes a rotating bracket 21 and a plurality of blades 22. The rotating bracket 21 is suspended above the base 11 and rotatably fitted onto the top of the bracket cylinder 131. Each blade 22 is rotatably mounted on the top of the rotating bracket 21 and slidably connected to the top of the bracket cylinder 131. The inner end of each blade 22 surrounds the top of the bracket cylinder 131 to form the aperture hole 100 of the variable aperture. Along the height direction, the drive assembly 30 is located between the circuit board 12 and the rotating bracket 21, thereby reducing the length and width dimensions occupied by the drive assembly 30, resulting in a smaller length and width dimension of the variable aperture. The driving component 30 is used to drive the rotating bracket 21 to rotate relative to the bracket cylinder 131. While the rotating bracket 21 drives each of the blades 22 to rotate relative to the rotating bracket 21, it also drives each of the blades 22 to slide relative to the bracket cylinder 131, so that the aperture of the aperture hole 100 of the variable aperture formed by the inner ends of each of the blades 22 changes, thereby controlling the amount of light entering.

[0062] Specifically, the base 11 has a base through hole 111, and the circuit board 12 has a circuit board through hole 121. The position of the circuit board through hole 121 of the circuit board 12 corresponds to the position of the base through hole 111 of the base 11, and the central axis of the variable aperture passes through the center of the base through hole 111 of the base 11 and the center of the circuit board through hole 121 of the circuit board 12. That is, the base 11 and the circuit board 12 are assembled concentrically. In other words, when assembling the circuit board 12 and the base 11, the center of the base through hole 111 of the base 11 and the center of the circuit board through hole 121 of the circuit board 12 are first identified, then the center of the circuit board through hole 121 of the circuit board 12 is aligned with the center of the base through hole 111 of the base 11, and then the circuit board 12 is stacked on top of the base 11, thereby achieving the concentric assembly of the base 11 and the circuit board 12.

[0063] The bottom position of the cylindrical through hole 1311 of the support cylinder 131 of the fixed bracket 13 corresponds to the position of the circuit board through hole 121 of the circuit board 12 and the base through hole 111 of the base 11, and the central axis of the variable aperture passes through the center of the cylindrical through hole 1311 of the support cylinder 131. That is, the base 11, the circuit board 12, and the support cylinder 131 are assembled in a centered manner. In other words, before assembling the fixed bracket 13, the center of the cylindrical through hole 1311 of the support cylinder 131 is first identified, then the center of the cylindrical through hole 1311 of the support cylinder 131 is aligned with the center of the base through hole 111 of the base 11, and then the extension block 132 is stacked on the base 11, thereby realizing the centered assembly of the base 11, the circuit board 12, and the support cylinder 131.

[0064] The rotating bracket 21 has a bracket through hole 211. The top of the bracket cylinder 131 of the fixed bracket 13 passes through the bracket through hole 211 of the rotating bracket 21. A gap exists between the inner wall of the rotating bracket 21 that defines the bracket through hole 211 and the outer wall of the bracket cylinder 131, allowing the rotating bracket 21 to be rotatably fitted onto the top of the bracket cylinder 131. In some embodiments, a portion of the camera's optical lens can extend into the cylinder through hole 1311 of the bracket cylinder 131 through the base through hole 111 of the base 11 and the circuit board through hole 121 of the circuit board 12, thereby setting the variable aperture on the light-incident side of the camera's optical lens.

[0065] To suspend the rotating bracket 21 above the base 11, in a specific example of the variable aperture of the present invention, the blade rotating assembly 20 further includes a set of balls 23. At different positions in the circumferential direction, each ball 23 is rotatably disposed between each of the extension blocks 132 of the fixed bracket 13 and the rotating bracket 21, so that the rotating bracket 21 is suspended above the base 11 by each ball 23. When the driving assembly 30 drives the rotating bracket 21 to rotate relative to the bracket cylinder 131, each ball 23 rolls between the rotating bracket 21 and each of the extension blocks 132, so that the rotating bracket 21 rotates smoothly and avoids tilting. Preferably, the fixed bracket 13 includes three extension blocks 132 arranged around the circumferential direction of the bracket cylinder 131, and the number of balls 23 is also three. Thus, the three balls 23 cooperate with each other to prevent the rotating bracket 21 from tilting.

[0066] Referring to Figures 11 to 13, each of the extended blocks 132 of the fixed bracket 13 has a first track groove 1321, and the rotating bracket 21 has a set of second track grooves 212. In the height direction, the positions of the second track grooves 212 of the rotating bracket 21 correspond to the positions of the first track grooves 1321 of each of the extended blocks 132 of the fixed bracket 13. The bottom of the ball bearing 23 is disposed in the first track groove 1321 of the extended block 132, and the top of the ball bearing 23 is disposed in the rotating bracket 21. The second track groove 212 of 1, and the ball 23 and the support cylinder 131 have an inner contact, the ball 23 and the extension block 132 have a lower contact, and the ball 23 and the rotating support 21 have an outer contact and an upper contact. In this way, on the one hand, the ball 23 is reliably disposed between the fixed support 13 and the rotating support 21, and on the other hand, the ball 23 causes the rotating support 21 to be suspended above the base 11 and rotatably fitted onto the top of the support cylinder 131.

[0067] In a specific example of the variable aperture of the present invention, the second track groove 212 of the rotating bracket 21 extends in the circumferential direction, so that when the driving assembly 30 drives the rotating bracket 21 to rotate, the ball 23 rolls in place in the first track groove 1321 of the extension block 132, and the ball 23 rolls in the second track groove 212 of the rotating bracket 21 along the extension direction of the second track groove 212. In this way, not only can the rotating bracket 21 rotate smoothly, but the size requirements of the extension block 132 can also be reduced, so that the fixed bracket 13 can provide more space for setting the driving assembly 30.

[0068] Referring to Figures 13, 14, and 16, the driving assembly 30 includes at least one pair of coils 31 and at least one pair of driving magnets 32. The coils 31 are disposed on the circuit board 12, and the driving magnets 32 are disposed on the rotating bracket 21. In the height direction, the positions of the coils 31 and the driving magnets 32 correspond to each other. This reduces the length and width dimensions occupied by the driving assembly 30, making the length and width dimensions of the variable aperture smaller. When current flows through the coils 31, the coils 31 and the driving magnets 32 cooperate to drive the rotating bracket 21 to rotate.

[0069] Unlike existing technologies that use curved coils, in one example of the variable aperture of the present invention, the coil 31 is set to be non-curved. For example, referring to Figures 14 and 15, from a top view, the coil 31 can be trapezoidal to reduce the difficulty of forming the coil 31.

[0070] In one example of the variable aperture of the present invention, the driving assembly 30 includes three pairs of coils 31, wherein two of the first pair of coils 31 are symmetrically arranged, and the line of symmetry is a line perpendicular to the length direction of the circuit board 12 and passing through the center of the circuit board through hole 121. In this way, the rotational torque A of the first pair of coils 31 may not be located at the center of the circuit board through hole 121 of the circuit board 12, but falls on the boundary line between the first quadrant and the fourth quadrant. The second pair of coils 31 and the third pair of coils 31 are symmetrical with respect to the line of symmetry. In this way, the rotational torque C of the second pair of coils 31 falls in the third quadrant, and the rotational torque B of the third pair of coils 31 falls in the fourth quadrant. That is, the rotational torques of the three pairs of coils 31 fall in different quadrants, ensuring that the driving force center of these coils 31 is consistent with the center of the circuit board through hole 121 of the circuit board 12. This can reduce the problem of excessive stress and easy deformation of the circuit board 12 caused by the same resultant force component being too concentrated in a certain quadrant. Optionally, in another example of the variable aperture of the present invention, the rotational torque of the three pairs of coils 31 all fall at the center position of the circuit board through hole 121 of the circuit board 12, ensuring that the center of the driving force of these coils 31 is consistent with the center of the circuit board through hole 121 of the circuit board 12. In this way, not only can the loss of the driving force provided by each coil 31 be effectively reduced, but the bending deformation of the circuit board 12 can also be effectively avoided.

[0071] In the variable aperture of the present invention, since the driving magnet 32 ​​is disposed on the rotating bracket 21, the driving magnet 32 ​​and the rotating bracket 21 are relatively stationary. Thus, the volume and weight of the driving magnet 32 ​​can be appropriately increased, thereby increasing the magnetic field strength of the driving magnet 32. This enables the rotating bracket 21 to rotate even when a small current is applied to the coil 31, thereby reducing the power consumption of the variable aperture.

[0072] Furthermore, unlike existing technologies that use arc-shaped driving magnets, in one example of the variable aperture of the present invention, referring to Figures 12 and 13, the driving magnet 32 ​​is a strip magnet. This allows for a further increase in size while avoiding breakage of the driving magnet 32. This not only helps to further reduce the gap between the driving magnet 32 ​​and the coil 31, but also increases the magnetic field strength of the driving magnet 32, reducing the current required to drive the rotating bracket 21 to rotate and lowering the power consumption of the variable aperture.

[0073] Further, referring to Figures 10 and 13, the rotating bracket 21 has at least one pair of magnet mounting slots 213, and the driving magnet 32 ​​is mounted in the magnet mounting slots 213 of the rotating bracket 21, thereby reducing the height of the variable aperture. Preferably, referring to Figure 10, the blade rotating assembly 20 includes at least one magnetic guide plate 24, and one magnetic guide plate 24 can be disposed in the magnet mounting slot 213 of the rotating bracket 21. After the driving magnet 32 ​​is mounted in the magnet mounting slot 213 of the rotating bracket 21, the driving magnet 32 ​​is stacked on the magnetic guide plate 24, and the magnetic guide plate 24 is used to prevent the driving magnet 32 ​​from leaking magnetic flux in the direction away from the coil 31. More preferably, the magnetic guide plate 24 is disposed in the magnet mounting slot 213 of the rotating bracket 21 based on an insert injection molding process.

[0074] Referring to Figure 12, the base 11 has at least a pair of spaced-apart protrusions 112 and a slot 113 formed between the pair of protrusions 112, wherein the extension block 132 of the fixing bracket 13 is engaged in the slot 113 of the base 11 to achieve high-precision assembly between the fixing bracket 13 and the base 11.

[0075] Preferably, the size of the slot 113 of the base 11 is larger than the size of the extension block 132 of the fixing bracket 13. This allows the assembly position of the fixing bracket 13 to be actively calibrated after the extension block 132 of the fixing bracket 13 is engaged in the slot 113 of the base 11. For example, the assembly position of the fixing bracket 13 can be calibrated by rotating it. More preferably, there is a calibration margin of 0.5°-1° between the latch protrusion 112 of the base 11 and the extension block 132 of the fixing bracket 13.

[0076] In this specific example of the variable aperture of the present invention shown in Figures 1 to 19, the base 11 has three pairs of mutually spaced protrusions 112 and three slots 113, with a slot 113 formed between each pair of protrusions 112, so that the three extension blocks 132 of the fixed bracket 13 can be respectively snapped into the three slots 113 of the base 11.

[0077] Referring again to Figures 12 to 15, the circuit board 12 has at least one clearance groove 122 for accommodating the latching protrusions 112 of the base 11, thus allowing the circuit board 12 to be stacked on top of the base 11. That is, the latching protrusions 112 of the base 11 extend above the circuit board 12 via the clearance groove 122. Preferably, the circuit board 12 has three clearance grooves 122, each used to accommodate one of the three pairs of latching protrusions 112 of the base 11.

[0078] Referring to Figures 12 to 14, the circuit board 12 includes a circuit board body 123, a first extension plate 124, a second extension plate 125, a first external circuit board 126, and a second external circuit board 127. The first extension plate 124 extends from one side of the circuit board body 123 to the first external circuit board 126, and the second extension plate 124 extends from the other side of the circuit board body 123 to the second external circuit board 126. The first extension plate 124 and the second extension plate 125 are symmetrical to each other. The first external circuit board 126 and the second external circuit board 127 are symmetrical to each other. The line of symmetry is a line perpendicular to the length direction of the circuit board 12 and passes through the center of the circuit board through hole 121. In this way, when the circuit board 12 is assembled, when the suction nozzle of the adsorption device adsorbs the circuit board body 123, the first extension plate 124 and the second extension plate 125, the adsorption force is more uniform, reducing the deformation of the circuit board 12 caused by uneven adsorption force, thereby avoiding the eccentricity of the circuit board through hole 121 of the circuit board 12.

[0079] In one example of the variable aperture of the present invention, the circuit board through-hole 121 and the clearance groove 122 of the circuit board 12 are both formed in the circuit board body 123.

[0080] Furthermore, referring to Figures 13, 14, and 18, the circuit board body 123 of the circuit board 12 has multiple through holes 1231. The coil 31 is mounted on the circuit board body 123, and the hollow portion of the coil 31 corresponds to the position of the through holes 1231 of the circuit board body 123. The base 11 has multiple bosses 114. The bosses 114 of the base 11 protrude into the hollow portion of the coil 31 after passing through the through holes 1231 of the circuit board body 123 of the circuit board 12. In this way, the assembly direction of the circuit board 12 can be determined when assembling the circuit board 12 onto the base 11.

[0081] Referring again to Figures 13 and 14, each blade 22 has a rotating hole 221 at its outer end and a guide groove 222 in its middle portion. The guide groove 222 is a strip-shaped groove. The top of the rotating bracket 21 has a plurality of rotating columns 214 arranged in the circumferential direction. The rotating columns 214 of the rotating bracket 21 are rotatably mounted in the rotating hole 221 of the blade 22, so that the outer end of the blade 22 is rotatably mounted in the top of the rotating bracket 21. The top of the bracket cylinder 131 has a plurality of guide columns 1312 arranged in the circumferential direction. The guide columns 1312 of the bracket cylinder 131 are slidably mounted in the guide groove 222 of the blade 22, so that the middle portion of the blade 22 is slidably connected to the top of the bracket cylinder 131. When current flows through the coil 31, the coil 31 and the driving magnet 32 ​​cooperate to drive the rotating bracket 21 to rotate relative to the bracket cylinder 131. The rotating bracket 21 and the bracket cylinder 131 cooperate to drive the blades 22 to rotate relative to the rotating bracket and slide relative to the bracket cylinder 131, so that the aperture of the aperture hole 100 formed by the inner ends of these blades 22 changes.

[0082] It is understood that, since the guide groove 222 of the blade 22 is a strip-shaped groove, the blade 22 can provide space for the sliding of the guide post 1312 of the support cylinder 131, realizing smooth sliding of the blade 22 relative to the support cylinder 131. At the same time, the strip-shaped groove has a simple structure, is suitable for mass production, and is easy to control the processing accuracy, thereby realizing precise control of the aperture hole 100 of the variable aperture. Optionally, in other examples of the variable aperture of the present invention, the guide groove 222 of the blade 22 can also be an arc-shaped groove.

[0083] Optionally, in other specific examples of the variable aperture of the present invention, the rotating hole 221 may be formed on the top of the rotating bracket 21, the outer end of the blade 22 is provided with the rotating post 214, the rotating post 214 of the blade 22 is rotatably mounted in the rotating hole 221 of the rotating bracket 21, so that the outer end of the blade 22 is rotatably mounted on the top of the rotating bracket 21, wherein the guide groove 222 may be formed on the top of the bracket cylinder 131, the middle part of the blade 22 is provided with the guide post 1312, the guide post 1312 of the blade 22 is slidably mounted in the guide groove 222 of the bracket cylinder 131, so that the middle part of the blade 22 is slidably connected to the top of the bracket cylinder 131.

[0084] To reduce the friction between the blades 22 and the top of the rotating bracket 21 and the top of the bracket cylinder 131, the top of the rotating bracket 21 has multiple first support surfaces 215 arranged circumferentially to support the outer ends of the blades 22. In this way, the contact area between the top of the rotating bracket 21 and the outer ends of the blades 22 can be significantly reduced. The top of the bracket cylinder 131 has multiple second support surfaces 1313 arranged circumferentially to support the middle of the blades 22. In this way, the contact area between the top of the bracket cylinder 131 and the middle of the blades 22 can be significantly reduced. In this manner, the blades 22 can be smoothly driven.

[0085] It is worth mentioning that the number of blades 22 is not limited in the variable aperture of the present invention. For example, in this specific example of the variable aperture of the present invention shown in Figures 1 to 15, the number of blades 22 is eight, with four blades 22 located in the lower layer and four blades 22 located in the upper layer. The four blades 22 in the lower layer and the four blades 22 in the upper layer are staggered. In this way, the inner ends of the eight blades 22 can form the aperture hole 100 of the variable aperture and significantly reduce light leakage to ensure the imaging quality of the camera.

[0086] To prevent the four lower blades 22 from contacting the four upper blades 22, the eight first support surfaces 215 of the rotating bracket 21 are divided into two groups. The height of one group of first support surfaces 215 is lower than the height of the other group of first support surfaces 215, and the height difference is slightly greater than the thickness of the blades 22. Furthermore, there is a higher first support surface 215 between any two adjacent first support surfaces 215 in the lower group. Correspondingly, the eight second support surfaces 1313 of the bracket cylinder 131 are divided into two groups. The height of one group of second support surfaces 1313 is lower than the height of the other group of second support surfaces 1313, and the height difference is slightly greater than the thickness of the blades 22. The thickness is greater than that of the blade 22, and there is a higher second support surface 1313 between the lower set of second support surfaces 1313, wherein the outer end of the lower blade 22 is supported by the lower first support surface 215 of the rotating bracket 21 and the middle part is supported by the lower second support surface 1313 of the bracket cylinder 131, and the outer end of the upper blade 22 is supported by the higher first support surface 215 of the rotating bracket 21 and the middle part is supported by the lower second support surface 1313 of the bracket cylinder 131, so that the lower blade 22 and the upper blade 22 have a gap in the height direction to avoid contact.

[0087] Further, referring to Figures 10 to 13, the variable aperture includes a light-shielding ring 40, which is disposed on the top of the support cylinder 131 in a manner surrounding the top opening of the support cylinder 131. The light-shielding ring 40 is located near the inner ends of the blades 22 to provide a stray light shielding effect. The light-shielding ring 40 can be manufactured using a coating process or by direct injection molding of black plastic. The sliding friction coefficient of the light-shielding ring 40 is between 0.05 and 0.2. This ensures that even if the inner ends of the lower blades 22 are in direct contact with the light-shielding ring 40, there can be minimal friction between them, which is beneficial for the rotation of the blades 22.

[0088] Preferably, the top of the support cylinder 131 has a groove 1310, and the light-shielding ring 40 is disposed in the groove 1310 of the support cylinder 131. This helps to reduce the height of the variable aperture. When assembling the light-shielding ring 40 to the top of the support cylinder 131, the center of the channel of the light-shielding ring 40 is first identified, then the center of the light-shielding ring 40 is aligned with the center of the support cylinder 131, and then the light-shielding ring 40 is assembled to the top of the support cylinder 131. This helps to ensure the assembly accuracy of the variable aperture.

[0089] Further referring to Figures 10 to 13, the variable aperture further includes a cover 50 having a cover through-hole 51, wherein the cover 50 is mounted on the base 11 for receiving the rotating bracket 21 and the blade 22, and the position of the cover through-hole 51 of the cover 50 corresponds to the position of the aperture hole 100, so as to allow incident light to reach the aperture hole 100 after passing through the cover through-hole 51 of the cover 50. It is understood that the base 11, the circuit board 12, and the cover 50 form the general appearance of the variable aperture.

[0090] Preferably, the cover 50 has a plurality of clearance channels 52 that pass through opposite sides of the cover 50, wherein the position of the rotating column 214 of the rotating bracket 21 corresponds to the position of the clearance channel 52 of the cover 50, and the extending direction of the clearance channel 52 of the cover 50 is consistent with the rotation path of the rotating column 214 of the rotating bracket 21. In this way, when the rotating bracket 21 rotates, the rotating column 214 of the rotating bracket 21 can be prevented from scraping against the cover 50, so that the rotating bracket 21 can rotate smoothly.

[0091] Figures 1 to 9 illustrate the assembly process of the variable aperture of the present invention, wherein the variable aperture is assembled using a stacked concentric assembly method.

[0092] Referring to Figure 1, a base 11 is provided, wherein the base 11 is annular, the base 11 has a base through hole 111 in the middle, and the top is provided with three pairs of latching protrusions 112 arranged in the circumferential direction, three latching grooves 113 formed by each pair of latching protrusions 112, and a plurality of bosses 114 arranged in the circumferential direction. Preferably, the base 11 is injection molded by an insert injection molding process, which allows a conductive portion 115 to be embedded inside the base 11.

[0093] Referring to Figure 2, a plurality of coils 31 are provided on the top of the circuit board body 123 of the circuit board 12. For example, these coils 31 can be mounted on the top of the circuit board body 123. The circuit board body 123 is stacked on top of the base 11 with the center of the circuit board through hole 121 of the circuit board 12 and the center of the base through hole 111 of the base 11 aligned. The respective clearance grooves 122 of the circuit board 12 avoid the respective pairs of latching protrusions 112 of the base 11. The respective bosses 114 of the base 11 protrude into the hollow portion of the respective coils 31 after passing through the respective plate through holes 1231 of the circuit board body 123. The conductive portions 115 of the circuit board 12 and the base 11 are connected.

[0094] To ensure the consistency between the mechanical center of the base 11 (i.e., the center of the base through hole 111 of the base 11) and the mechanical center of the circuit board 12 (i.e., the center of the circuit board through hole 121 of the circuit board 12), in the variable aperture of the present invention, firstly, the circuit board 12 is designed as a symmetrical structure, that is, the first extension plate 124 and the first external circuit board 126 on one side of the circuit board 12 are symmetrical with the second extension plate 125 and the second external circuit board 127 on the other side of the circuit board 12. Thus, during the process of stacking the circuit board body 123 of the circuit board 12 on top of the base 11, when... When the suction nozzle of the adsorption device adsorbs onto the circuit board body 123, the first extension plate 124, and the second extension plate 125, it can make the adsorption force more uniform, reducing the deformation of the circuit board 12 caused by uneven adsorption force, thereby avoiding the eccentricity of the circuit board through hole 121 of the circuit board 12. Secondly, using the circuit board through hole 121 of the circuit board 12 as a positioning part, the center of the circuit board through hole 121 of the circuit board 12 is first identified, and then the center of the circuit board through hole 121 of the circuit board 12 is aligned with the center of the base through hole 111 of the base 11. Then, the circuit board body 123 is attached above the base 11. Optionally, in other examples of the variable aperture of the present invention, the three clearance grooves 122 of the circuit board 12 can serve as positioning parts to fit the center of the circuit board through hole 121 of the circuit board 12. It is understandable that whether the circuit board through hole 121 of the circuit board 12 is used as the positioning part or the three clearance grooves 122 of the circuit board 12 are used as the positioning part, it is not necessary to design a special positioning part on the circuit board body 123 of the circuit board 12. This can reduce the impact on the rigidity of the circuit board body 123 and help ensure the flatness of the circuit board body 123.

[0095] In addition, the arrangement of the three pairs of coils 31 can ensure that the driving force center of these coils 31 is consistent with the mechanical center of the base 11 and the mechanical center of the circuit board 12, so as to improve the accuracy of the variable aperture in controlling the amount of light.

[0096] Referring to Figure 3, with the center of the through hole 1311 of the support cylinder 131 aligned with the center of the through hole 111 of the base 11, each of the extension blocks 132 of the fixed bracket 13 is respectively fitted into the respective slots 113 of the base 11. This allows for high-precision assembly of the fixed bracket 13. It is understood that since the top of the support cylinder 131 is used to mount the blade 22, this assembly method of the base 11 and the fixed bracket 13 ensures that the blade 22 is positioned as centrally as possible, resulting in higher assembly precision for the variable aperture.

[0097] The three extension blocks 132 of the fixed bracket 13 each have a first track groove 1321 for receiving the bottom of each ball 23 and allowing the ball 23 to roll. The ball 23 is used to suspend the rotating bracket 21 above the base 11 and rollably fit onto the top of the bracket cylinder 131. Therefore, the three extension blocks 132 of the fixed bracket 13 determine the rotation center of the variable aperture. In the variable aperture of the present invention, in order to ensure that the rotation center of the variable aperture is consistent with the mechanical center of the base 11 and the mechanical center of the circuit board 12, the first track groove 1321 of the three extension blocks 132 of the fixed bracket 13 is first used as the positioning part to fit the center of the cylinder through hole 1311 of the bracket cylinder 131. Then, the center of the cylinder through hole 1311 of the bracket cylinder 131 and the center of the base through hole 111 of the base 11 are aligned. Next, the three extension blocks 132 of the fixed bracket 13 are respectively inserted into the three slots 113 of the base 11. Finally, the assembly position of the fixed bracket 13 is actively calibrated by rotating the fixed bracket 13.

[0098] Referring again to Figure 3, in one example of the present invention, after the fixed bracket 13 is assembled to the base 11, the light-shielding ring 40 can be provided on the top of the bracket cylinder 131 of the fixed bracket 13.

[0099] Referring to Figure 4, each of the ball bearings 23 is disposed in the first track groove 1321 of each of the extension blocks 132 of the fixed bracket 13.

[0100] Referring to Figure 5, the rotating bracket 21 is fitted onto the top of the support cylinder 131 with the center of the bracket through hole 211 of the rotating bracket 21 aligned with the center of the cylinder through hole 1311 of the support cylinder 131 of the fixed bracket 13. The positions of each of the second track grooves 212 of the rotating bracket 21 correspond to the positions of the first track grooves 1321 of each of the extension blocks 132 of the fixed bracket 13. The tops of each ball bearing 23 are respectively received in each of the second track grooves 212 of the rotating bracket 21. At this time, there is an inner contact between the ball bearing 23 and the support cylinder 131, a lower contact between the ball bearing 23 and the extension block 132, and an outer contact and an upper contact between the ball bearing 23 and the rotating bracket 21. Thus, these balls bearing 23 cause the rotating bracket 21 to be suspended above the base 11 and rotatably fitted onto the top of the support cylinder 131.

[0101] Referring to Figure 6, the four lower blades 22 are respectively positioned above the lower set of first support surfaces 215 of the rotating bracket 21 and above the lower set of second support surfaces 1313 of the bracket cylinder 131. The four rotating posts 214 of the rotating bracket 21 are rotatably extended to the rotating holes 221 of the four lower blades 22, and the four guide posts 1312 of the bracket cylinder 131 are slidably extended to the guide grooves 222 of the four lower blades 22. The higher set of second support surfaces 1313 of the bracket cylinder 131 is located outside the inner ends of the four lower blades 22, thus limiting the maximum outward swing distance of the four lower blades 22.

[0102] Referring to Figure 7, the four upper blades 22 are respectively positioned above the higher set of first support surfaces 215 of the rotating bracket 21 and above the higher set of second support surfaces 1313 of the bracket cylinder 131. The four rotating posts 214 of the rotating bracket 21 are rotatably extended to the rotating holes 221 of the four upper blades 22, and the four guide posts 1312 of the bracket cylinder 131 are slidably extended to the guide grooves 222 of the four upper blades 22. To limit the maximum outward swing distance of the four upper blades 22, the top of the rotating bracket 21 is provided with multiple limiting protrusions 216, located on the outer side of the four upper blades 22. Preferably, a limiting protrusion 216 may also be provided on the outer side of the four lower blades 22.

[0103] Referring to Figures 8 and 9, the cover 50 is installed on the base 11 with the position of the cover through hole 51 corresponding to the position of the aperture hole 100, so as to accommodate the rotating bracket 21 and the blade 22, thereby completing the assembly of the variable aperture.

[0104] In other words, according to another aspect of the present invention, the present invention further provides a stacked concentric assembly method, which includes the following steps:

[0105] After identifying the center of the circuit board through hole 121 of the circuit board 12 and the center of the base through hole 111 of the base 11 respectively, the circuit board body 123 of the circuit board 12 is stacked on top of the base 11 with the center of the circuit board through hole 121 and the center of the base through hole 111 aligned.

[0106] After identifying the center of the cylinder through hole 1311 of the support cylinder 131 of the fixed bracket 13, the outer extension block 132 of the fixed bracket 13 is stacked on top of the base 11 in such a way that the center of the cylinder through hole 1311 is aligned with the center of the base through hole 111.

[0107] Allowing the bottom of the ball 23 to be received in the first track groove 1321 of the extension block 132 of the fixed bracket 13;

[0108] With the center of the bracket through hole 211 and the center of the cylinder through hole 1311 of the rotating bracket 21 aligned, the rotating bracket 21 is rotatably mounted on the top of the bracket cylinder 131. The top of the ball bearing 23 is received in the second track groove 212 of the rotating bracket 21. The position of the driving magnet 32 ​​on the rotating bracket 21 and the position of the coil 31 on the circuit board body 123 correspond in the height direction.

[0109] The outer ends of each blade 22 are rotatably mounted on the top of the rotating bracket 21, and the middle part is slidably connected to the top of the bracket cylinder 131, so that the inner ends of each blade 22 form the aperture hole 100 of the variable aperture above the cylinder through hole 1311 of the bracket cylinder 131.

[0110] Figures 16 to 21 illustrate the specific structure of the second embodiment of the variable aperture. Unlike the variable aperture shown in Figures 1 to 15, in this specific example of the variable aperture shown in Figures 16 to 21, the support cylinder 131 of the fixed support 13 includes a lower cylinder 1314 and an upper cylinder 1315. The extension block 132 is disposed at the bottom of the lower cylinder 1314, and the guide post 1312 of the support cylinder 131 is disposed at the top of the upper cylinder 1315. After the rotating support 21 is fitted onto the top of the lower cylinder 1314, the upper cylinder 1315 is installed on the top of the lower cylinder 1314. The outer edge of the upper cylinder 1315 and the inner edge of the rotating support 21 overlap, so that the upper cylinder 1315 prevents the rotating support 21 from moving upward, thus ensuring the reliability of the variable aperture.

[0111] In one example of the variable aperture of the present invention, the top of the lower cylinder 1314 and the bottom of the upper cylinder 1315 are bonded together with adhesive to mount the upper cylinder 1315 onto the top of the lower cylinder 1314. Preferably, the top of the lower cylinder 1314 has a first step 13141, and the bottom of the upper cylinder 1315 has a second step 13151. The first step 13141 of the lower cylinder 1314 and the second step 13151 of the upper cylinder 1315 interlock to confine the adhesive used to bond the lower cylinder 1314 and the upper cylinder 1315 to a designed position, that is, the first step 13141 of the lower cylinder 1314 and the second step 13151 of the upper cylinder 1315 form an anti-overflow adhesive structure.

[0112] Before bonding the lower cylinder 1314 and the upper cylinder 1315, it is necessary to identify the center of the channel in the lower cylinder 1314 and the center of the channel in the upper cylinder 1315 respectively. After aligning the center of the channel in the lower cylinder 1314 and the center of the channel in the upper cylinder 1315, the lower cylinder 1314 and the upper cylinder 1315 are then bonded to ensure assembly accuracy.

[0113] In this specific example of the variable aperture shown in Figures 16 to 21, there are two light-shielding rings 40. One light-shielding ring 40 is positioned at the top of the upper cylinder 1315, below the lower blade 22, and the other light-shielding ring 40 is suspended above the upper blade 22. For example, the edge of this light-shielding ring 40 can be supported by the rotating column 214 of the rotating bracket 21 to suspend it above the upper blade 22. That is, one light-shielding ring 40 is provided below the lower blade 22 and above the upper blade 22 to avoid stray light. Preferably, the upper light-shielding ring 40 has multiple clearance grooves 41, the positions of which correspond to the positions of the guide columns 1312 of the bracket cylinder 131 to avoid the guide columns 1312.

[0114] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A variable aperture, characterized by, The variable aperture has an aperture hole with an adjustable diameter, and the aperture hole of the variable aperture is used to adjust the amount of light entering the lens on the light-incident side, wherein the variable aperture includes: A base assembly includes a base, a circuit board, and a mounting bracket, the circuit board being stacked on top of the base, and the mounting bracket including a bracket cylinder and an extension block extending outward from the bottom of the bracket cylinder, the extension block being stacked on top of the base. A blade rotation assembly includes a rotating bracket and multiple blades. The rotating bracket is rotatably fitted onto the top of a bracket cylinder. Each blade is rotatably mounted on the top of the rotating element and slidably connected to the top of the bracket cylinder. The inner ends of each blade form the aperture at the top of the bracket cylinder. A drive assembly, located along the height direction between the rotating bracket and the circuit board, wherein the drive assembly is used to drive the rotating bracket to rotate relative to the bracket cylinder, and the rotating bracket drives the blades to slide relative to the bracket cylinder while driving the blades to rotate, so as to change the aperture of the aperture formed by the inner ends of the blades.

2. The variable aperture of claim 1, wherein, The drive assembly includes at least one pair of non-arc coils and at least one pair of drive magnets. The coils are disposed on the circuit board, and the drive magnets are disposed on the rotating bracket. The positions of the coils and the positions of the drive magnets correspond in the height direction.

3. The variable aperture of claim 1, wherein, The drive assembly includes at least one pair of coils and at least one pair of strip-shaped drive magnets. The coils are disposed on the circuit board, and the drive magnets are disposed on the rotating bracket. The positions of the coils and the positions of the drive magnets correspond in the height direction.

4. The variable aperture of claim 1, wherein, The drive assembly includes three pairs of coils and three pairs of drive magnets. Two of the coils in the first pair are symmetrically arranged, with the line of symmetry being a line perpendicular to the length of the circuit board and passing through the center of the circuit board through-hole. The second and third pairs of coils are symmetrical with respect to this line of symmetry. Each pair of drive magnets is arranged on the rotating bracket along the circumferential direction of the rotating bracket, and the positions of each pair of coils and each pair of drive magnets correspond in the height direction.

5. The variable aperture of claim 4, wherein, The rotational torque of the first pair of coils falls on the boundary line between the first and fourth quadrants, the rotational torque of the second pair of coils falls on the third quadrant, and the rotational torque of the third pair of coils falls on the fourth quadrant.

6. The variable aperture of claim 4, wherein, The rotational torque of each pair of coils falls on the center of the circuit board through hole of the circuit board.

7. The variable aperture of any one of claims 1 to 6, wherein, The base has at least one pair of spaced-apart protrusions and a slot formed between the pair of protrusions, wherein the extension block of the fixing bracket is engaged in the slot of the base.

8. The variable aperture of claim 7, wherein, The size of the slot of the base is larger than the size of the extension block of the fixed bracket. After the extension block of the fixed bracket is engaged in the slot of the base, the fixed bracket is allowed to rotate to actively calibrate the assembly position of the fixed bracket.

9. The variable aperture of claim 8, wherein, There is a calibration margin of 0.5°-1° between the cam protrusion of the base and the extension block of the fixed bracket.

10. The variable aperture of any one of claims 1 to 6, wherein, The extended block of the fixed bracket has a first track groove, and the rotating bracket has a second track groove. In the height direction, the position of the first track groove of the extended block and the position of the second track groove of the rotating bracket correspond. The blade rotating assembly includes a ball bearing. The bottom of the ball bearing is rotatably received in the first track groove of the extended block, and the top of the ball bearing is rotatably received in the second track groove of the rotating bracket.

11. The variable aperture of any one of claims 1 to 6, wherein, The support cylinder of the fixed bracket includes a lower cylinder and an upper cylinder. The extension block is disposed on the lower cylinder. After the rotating bracket is fitted onto the top of the lower cylinder, the bottom of the upper cylinder is installed on the bottom of the lower cylinder. The outer edge of the upper cylinder and the inner edge of the rotating bracket overlap in the height direction.

12. The variable aperture of claim 11, wherein, The lower cylinder has a first step, and the upper cylinder has a second step. The first step of the lower cylinder and the second step of the upper cylinder interlock to form an anti-overflow adhesive structure. Adhesive is used to bond the lower cylinder and the upper cylinder at the first step of the lower cylinder and the second step of the upper cylinder.

13. A method of stack centering an assembly of an iris, characterized in that, The stacked concentric assembly method includes the following steps: After identifying the center of the circuit board through hole and the center of the base through hole respectively, the circuit board body of the circuit board is stacked on top of the base with the center of the circuit board through hole and the center of the base through hole aligned. After identifying the center of the through hole in the support cylinder of the fixed bracket, the outer extension block of the fixed bracket is stacked on top of the base with the center of the through hole in the cylinder aligned with the center of the through hole in the base. Allowing the bottom of the ball to be received in the first track groove of the extension block of the fixed bracket; The rotating bracket is rotatably mounted on the top of the bracket cylinder with the center of the bracket through hole aligned with the center of the cylinder through hole. The top of the ball is received in the second track groove of the rotating bracket. The position of the driving magnet of the rotating bracket and the position of the coil of the circuit board body are corresponding in the height direction. as well as The outer ends of each blade are rotatably mounted on the top of the rotating bracket, and the middle part is slidably connected to the top of the bracket cylinder, so that the inner ends of each blade form the aperture of the variable aperture above the through hole of the bracket cylinder.

14. The stacked, centering assembly method of claim 13, wherein, In the above method, the circuit board through hole of the circuit board is used as the positioning part to identify the center of the circuit board through hole.

15. The stacked concentric assembly method according to claim 13, characterized in that, In the above method, the center of the circuit board through hole is fitted by the three clearance slots of the circuit board.

16. The stacked concentric assembly method according to claim 13, characterized in that, In the above method, the center of the through hole of the support cylinder is fitted by the first track groove of the three extension blocks.

Images