Variable aperture, imaging device, and electronic apparatus

Abstract

The utility model provides a variable aperture, a camera device and electronic equipment. The variable aperture comprises a base, a first magnet, a second magnet, a coil, a rotating support and blades. A cavity is formed in the base and used for containing the first magnet, the second magnet, the coil and the rotary support. The base is movably connected with the rotating bracket; the base and the coil are relatively fixed; the first magnet and the second magnet are both relatively fixed with the rotating bracket; the first magnets and the second magnets are adjacently arranged on the peripheral side of the rotating support, and the coils are arranged between the adjacent first magnets and second magnets; when the direction of Ampere force applied by the coil to the first magnet and the second magnet changes, the first magnet and the second magnet are both used for driving the rotating support to rotate. The blades are distributed on the top side of the rotating support in a central symmetry mode. The rotating bracket and the base are movably connected with the blades; when the rotating support rotates, the blades are driven to be close to or away from the rotating shaft of the rotating support. The iris ring is used for improving the driving force on the blades.

Description

[0001] This application claims the priority of Chinese patent application 202321994822.7 filed on July 26, 2023, and incorporates the entire contents of this patent application by introduction. Technical Field

[0002] The utility model relates to the field of optical lens equipment, in particular to a variable aperture, a camera device and electronic equipment. Background Art

[0003] At present, electronic devices such as smart phones and tablet computers have become indispensable in people's lives. With the continuous development of the electronic equipment industry, the functions of electronic devices have gradually become diversified and intelligent, among which the shooting function has become one of the essential functions of electronic devices. In order to make electronic devices obtain photography effects close to those of SLR cameras, the camera module is equipped with a variable aperture, which can adjust the amount of light according to the shooting environment.

[0004] The existing magneto-electric variable aperture includes a fixed part, a rotating part, a plurality of blades and an upper cover. The magnet connected to the rotating part and the coil connected to the fixed part generate an electromagnetic driving force, so that the rotating part rotates relative to the fixed part, thereby causing the rotating part to push the plurality of blades to open and close. After the existing variable aperture is miniaturized, the installation space of the magnet is limited, the thrust of the magnet is small, and it is difficult to drive the blades to open and close, which easily leads to a decrease in the yield of the variable aperture. Therefore, a new type of variable aperture, camera device and electronic equipment are urgently needed to improve the above problems. Utility Model Content

[0005] The utility model aims to provide a variable aperture, a camera device and an electronic device. The variable aperture is used to enhance the driving force on a blade.

[0006] In the first aspect, the utility model provides a variable aperture, comprising: a base, a first magnet, a second magnet, a coil, a rotating bracket and blades; a cavity is provided in the base for accommodating the first magnet, the second magnet, the coil and the rotating bracket; the base is movably connected to the rotating bracket; the base and the coil are relatively fixed; the first magnet and the second magnet are relatively fixed to the rotating bracket; the first magnet and the second magnet are adjacently arranged on the circumference of the rotating bracket, and the coil is arranged between the adjacent first magnet and the second magnet; when the direction of the magnetic lines of force applied by the coil to the first magnet and the second magnet changes, the first magnet and the second magnet are used to drive the rotating bracket to rotate; a plurality of blades are centrally symmetrically distributed on the top side of the rotating bracket; the rotating bracket and the base are both movably connected to the blades; when the rotating bracket rotates, it is used to drive a plurality of blades to approach or move away from the rotating axis of the rotating bracket.

[0007] The beneficial effects of the device of the utility model are as follows: the utility model arranges the first magnet and the second magnet adjacent to each other on the circumferential side of the rotating bracket, and arranges the coil between the adjacent first magnet and second magnet; when the direction of the magnetic lines of force applied by the coil to the first magnet and the second magnet changes, the first magnet and the second magnet drive the rotating bracket to rotate, and then drive the plurality of blades to approach or move away from the rotating axis of the rotating bracket, which can enhance the driving force on the blades, is beneficial to the miniaturization of the variable aperture, and is beneficial to improving the yield of the variable aperture.

[0008] Optionally, the winding axis of the coil is parallel to the rotation axis of the rotating bracket; when the first magnet and the second magnet are both set as multi-polar magnets, the first magnet includes a first magnet and a second magnet, and the opposite magnetic poles of the first magnet and the second magnet are located at the same end of the first magnet; the second magnet includes a third magnet and a fourth magnet, and the opposite magnetic poles of the third magnet and the fourth magnet are located at the same end of the second magnet; the magnetization directions of the first magnet, the second magnet, the third magnet and the fourth magnet are all arranged along the radial direction of the rotating bracket; the magnetic pole of the first magnet facing the coil is opposite to the magnetic pole of the second magnet facing the coil on the same side, so that the directions of the magnetic lines of force on both sides of the coil are opposite; when the first magnet and the second magnet are both set as single-polar magnets, the magnetization directions of the first magnet and the second magnet are both arranged along the circumference of the rotating bracket; the magnetic poles of the first magnet and the second magnet at the same end are opposite, so that the directions of the magnetic lines of force on both sides of the coil are opposite; when the energization direction of the coil changes, the direction of the Ampere force applied by the coil to the first magnet and the second magnet changes, which is used to drive the rotating bracket to rotate.

[0009] Optionally, a accommodating groove is provided on a peripheral side of the rotating bracket, and at least a portion of the coil protrudes into the accommodating groove.

[0010] Optionally, the number of the coils, the first magnets and the second magnets is M, where M is an integer greater than 1; each coil is electrically connected to two non-contacting energizing pins; and the energizing pins are made of metal sheets.

[0011] Optionally, the two energized pins connected to the same coil are commonly connected to a positioning column; the positioning column is arranged on the inner side of the coil; and the positioning column is made of a plastic block.

[0012] Optionally, the base is connected to a positioning block; one end of the energized foot away from the coil is connected to the positioning block; and the positioning block is made of a plastic block.

[0013] Optionally, the positioning block, the positioning column and the energizing foot are integrally formed through an injection molding process to form a coil bracket; the coil bracket is used to carry the coil.

[0014] Optionally, a flexible circuit board is further included, at least a portion of which is arranged around the circumferential side wall of the base, and the energizing pin is electrically connected to the flexible circuit board.

[0015] Optionally, the energizing pin or the flexible circuit board is connected to a position sensor for detecting the position of the first magnet or the second magnet.

[0016] Optionally, a composite reinforcement plate corresponding to the first magnet or the second magnet is provided on the outside of the flexible circuit board, and the composite reinforcement plate includes a magnetic conductive area and a non-magnetic conductive area; the position sensor includes a Hall chip and a capacitor; the Hall chip is close to the non-magnetic conductive area and away from the magnetic conductive area.

[0017] Optionally, a gasket is provided at the top of the rotating bracket, and the top of the gasket is in contact with the blade to reduce the friction force when the blade moves.

[0018] Optionally, it also includes a cover plate, which is cooperatively connected with the base; a metal sheet is embedded in the cover plate to improve the strength of the cover plate.

[0019] Optionally, the cover plate is provided with a buckle, and the base is provided with a slot; when the buckle is engaged with the slot, the cover plate and the base are relatively fixed.

[0020] Optionally, the cover plate is connected to an upper magnetic sheet; the upper magnetic sheet is made of magnetic metal material and is used to magnetically absorb the first magnet; the base is connected to a side magnetic sheet, which is used to magnetically absorb the first magnet and / or the second magnet, so that the first magnet and the second magnet drive the rotating bracket to be close to one end of the peripheral side of the base.

[0021] Optionally, a rolling groove is further provided in the base, and the rolling groove is connected to the cavity; a rolling element is movably connected in the rolling groove, and when the rotating bracket is close to one end of the peripheral side of the base, the rolling element and the rotating bracket roll and rub.

[0022] Optionally, the top of the cover plate is also connected to a baffle, the baffle is provided with a coating, and an anti-reflection film is provided on the surface of the coating. The beneficial effect is that the anti-reflection film can reduce the influence of the reflected light on the incident side on the lens imaging; at the same time, it can save the cost of directly providing the anti-reflection film on the cover plate.

[0023] In a second aspect, the utility model provides a camera device, comprising the variable aperture described in any one of the first aspects.

[0024] In a third aspect, the utility model provides an electronic device, comprising the camera device described in any one of the second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An exploded schematic diagram of a variable aperture provided by the utility model;

[0026] Figure 2 A schematic diagram of the installation position of a single-stage magnet and a coil provided by the utility model;

[0027] Figure 3 A schematic diagram of the installation position of a multi-level magnet and a coil provided by the utility model;

[0028] Figure 4 A schematic diagram of the installation structure of an energizing foot provided by the utility model;

[0029] Figure 5 A three-dimensional cross-sectional schematic diagram of a composite reinforcement plate provided by the utility model installed on a base;

[0030] Figure 6 A schematic diagram of a variable aperture provided with a buckle and a slot provided by the utility model.

[0031] Numbers in the figure:

[0032] 1. Base; 101. Cavity; 102. Buckle; 103. Slot; 201. First magnet; 202. Second magnet; 211. First magnet; 212. Second magnet; 213. Third magnet; 214. Fourth magnet; 301. Coil; 302. Power-on foot; 303. Positioning column; 304. Positioning block; 305. Winding shaft; 4. Rotating bracket; 401. Rotating shaft; 402. Receiving groove; 5. Blade; 6. Flexible circuit board; 7. Position sensor; 701. Hall chip; 8. Composite reinforcement plate; 801. Magnetic conductive area; 802. Non-magnetic conductive area; 91. Cover plate; 92. Upper magnetic sheet; 93. Gasket; 94. Baffle. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the utility model belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0037] In view of the problems existing in the existing technology, such as Figure 1 As shown, the utility model provides a variable aperture, comprising: a base 1, a first magnet 201, a second magnet 202, a coil 301, a rotating bracket 4 and a blade 5; a cavity 101 is provided in the base 1 for accommodating the first magnet 201, the second magnet 202, the coil 301 and the rotating bracket 4; the base 1 is movably connected to the rotating bracket 4; the base 1 is fixedly connected to the coil 301; the first magnet 201 and the second magnet 202 are both fixedly connected to the rotating bracket 4; the rotating bracket 4 can rotate along a vertical rotation axis 401. The first magnet 201 and the second magnet 202 are adjacently arranged on the circumferential side of the rotating bracket 4, and the coil 301 is arranged between the adjacent first magnets 201 and second magnets 202; when the direction of the Ampere force applied by the coil 301 to the first magnet 201 and the second magnet 202 changes, the first magnet 201 and the second magnet 202 are both used to drive the rotating bracket 4 to rotate in the circumferential direction; the six blades 5 are centrally symmetrically distributed on the top side of the rotating bracket 4; the rotating bracket 4 and the base 1 are both movably connected to the blades 5; when the rotating bracket 4 rotates, it is used to drive a number of the blades 5 to approach or move away from the rotating axis 401 of the rotating bracket 4.

[0038] Specifically, the six blades 5 are arranged in two layers in the vertical direction, and each layer is provided with three centrally symmetrical blades 5, and the blades 5 are rotatably connected to the base 1; the blades 5 are slidably connected to the rotating bracket; when the rotating bracket rotates, it is used to pull one end of the blade 5 toward or away from its symmetry center. It is worth noting that the number of the blades 5 can be an integer greater than 6.

[0039] In some embodiments, a gasket 93 is provided at the top of the rotating bracket 4, and the top of the gasket 93 contacts the blade 5 to reduce friction when the blade 5 moves. Specifically, the top surface of the gasket 93 contacts the bottom end surfaces of the three blades 5 located in the bottom layer.

[0040] like Figure 2 As shown, in some other specific embodiments, the winding axis 305 of the coil 301 is parallel to the rotation axis 401 of the rotating bracket 4; the magnetization directions of the first magnet 201 and the second magnet 202 are both arranged along the circumference of the rotating bracket 4; the magnetic poles of the first magnet 201 and the second magnet 202 at the same end are opposite, so that the directions of the magnetic lines of force on both sides of the coil 301 are opposite; when the energization direction of the coil 301 changes, the direction of the Ampere force applied by the coil 301 to the magnet changes, and the first magnet 201 and the second magnet 202 are both used to drive the rotating bracket 4 to rotate.

[0041] like Figure 3 As shown, in some specific embodiments, the first magnet 201 and the second magnet 202 use multi-stage magnets, and the multi-stage magnets can be set as multiple magnets or multi-stage magnetized magnets. Specifically, the first magnet 201 includes a first magnet 211 and a second magnet 212, and the opposite poles of the first magnet 211 and the second magnet 212 are located at the same end of the first magnet; the second magnet 202 includes a third magnet 213 and a fourth magnet 214, and the opposite poles of the third magnet 213 and the fourth magnet 214 are located at the same end of the second magnet and the first magnet; 202; the magnetization directions of the first magnet 211, the second magnet 212, the third magnet 213 and the fourth magnet 214 are all set along the radial direction of the rotating bracket; the first magnet is oriented toward the coil 301 The magnetic poles of the second magnet and the first magnet; 202 are opposite to the magnetic poles of the coil 301, so that the directions of the magnetic lines of force on both sides of the coil 301 are opposite, and the directions of the magnetic lines of force on both sides of the coil 301 are parallel to the winding axis of the coil 301; since the coil 301 adopts a double-sided driving magnet structural design, not only the driving force is doubled, but when the rotating bracket 4 rotates to a larger angle, the area around the coil 301 still has a denser magnetic field strength, so a large-angle rotation driving force can be achieved with a smaller current, which is beneficial to reducing the driving power consumption of the structure.

[0042] It is worth noting that the first magnet 211 and the second magnet 212 may be different magnetization regions of the first magnet 201 , and the third magnet 213 and the fourth magnet 214 may be different magnetization regions of the second magnet 202 .

[0043] For example, Figure 4As shown, the first magnet 201 and the second magnet 202 are single-pole magnets. Specifically, the first direction end of the first magnet 201 is an S pole, and the second direction end of the first magnet 201 is an N pole; the first direction end of the second magnet 202 is an N pole, and the second direction end of the second magnet 202 is an S pole. The first direction and the second direction are opposite directions.

[0044] In some other examples, the first direction end of the first magnet 201 is an N pole, and the second direction end of the first magnet 201 is an S pole; the first direction end of the second magnet 202 is an S pole, and the second direction end of the second magnet 202 is an N pole.

[0045] In some other examples, the first magnet 201 is a single-pole magnet, and the second magnet 202 is a multi-pole magnet; or, the first magnet 201 is a multi-pole magnet, and the second magnet 202 is a single-pole magnet.

[0046] In some embodiments, the winding cross section of the coil 301 is set in a circular shape. The first magnet 201 and the second magnet 202 are both set in a crescent shape. The first magnet 201 and the second magnet 202 have the same length, which is greater than the diameter of the winding cross section of the coil 301. In other embodiments, the winding cross section of the coil 301 is set in a rounded rectangular shape. The first magnet 201 and the second magnet 202 are both set in a fan-shaped ring shape.

[0047] Specifically, a receiving groove 402 is provided on the circumferential side of the rotating bracket 4, and the portion of the coil 301 facing the rotating bracket 4 protrudes into the receiving groove 402. In other specific embodiments, the first magnet 201 is connected to the top end surface of the receiving groove 402, and the second magnet 202 is connected to the bottom end surface of the receiving groove 402. This embodiment can reduce the volume required for the coil 301, which is conducive to reducing the size of the base 1. When the size of the base 1 is maintained unchanged, this embodiment can expand the inner diameter of the rotating bracket 4 to increase the light-transmitting area between the blades 5, which is conducive to improving the exposure intensity.

[0048] It is worth noting that both the first magnet 201 and the second magnet 202 can protrude from the circumference of the rotating bracket 4 , as long as the first magnet 201 and the second magnet 202 can move under the action of the magnetic field generated by the coil 301 .

[0049] Exemplarily, the number of the coil 301, the first magnet 201, and the second magnet 202 is 2. In other examples, the number of the coil 301, the first magnet 201, and the second magnet 202 is an integer greater than 1. Each coil 301 is electrically connected to two non-contacting energizing pins 302; the energizing pins 302 are made of bent metal sheets, and the coil 301 is made of enameled wire. This embodiment can prevent adjacent energizing pins 302 from short-circuiting.

[0050] Specifically, the two energized pins 302 connected to the same coil 301 are commonly connected to a positioning column 303; the positioning column 303 is arranged inside the coil 301; the positioning column 303 is made of a plastic block. In other specific embodiments, the base 1 is connected to a positioning block 304; one end of the energized pin 302 away from the coil 301 is connected to the positioning block 304; the positioning block 304 is made of a plastic block.

[0051] In some other embodiments, the base 1 is provided with a fixing groove, and the fixing groove is engaged with the positioning block 304; it is worth noting that the base 1 and the positioning block 304 can also be bonded by glue.

[0052] In some further specific embodiments, the positioning block 304 , the positioning column 303 and the energizing pin 302 may be integrally formed through an injection molding process to form a coil bracket; the coil bracket is used to carry the coil 301 .

[0053] In some embodiments, a flexible circuit board 6 is further included, wherein a first portion of the flexible circuit board 6 is disposed around the circumferential side wall of the base 1, and the energizing pin 302 is electrically connected to the flexible circuit board 6. A second portion of the flexible circuit board 6 is bent in a direction away from the base 1, and the second portion is disposed parallel to the bottom end surface of the base 1.

[0054] Specifically, the plane where the energizing pin 302 contacts the coil 301 is horizontally arranged; and the plane where the energizing pin 302 contacts the flexible circuit board 6 is vertically arranged.

[0055] In some other embodiments, the energizing pin 302 is connected to a position sensor 7, and the position sensor 7 is used to detect the position of the first magnet 201 or the second magnet 202. In some other embodiments, the flexible circuit board 6 is connected to the position sensor 7. This embodiment can save the electrical connection circuit required by the position sensor 7, which is conducive to reducing the volume of the variable aperture.

[0056] like Figure 5As shown, in some embodiments, a composite reinforcing plate 8 corresponding to the first magnet 201 or the second magnet 202 is provided on the outside of the flexible circuit board 6. The composite reinforcing plate 8 includes a magnetic conductive area 801 and a non-magnetic conductive area 802; the position sensor 7 includes a Hall chip 701 and a capacitor; the Hall chip 701 is close to the non-magnetic conductive area 802 and away from the magnetic conductive area 801. This embodiment can prevent the magnetic conductive area 801 from interfering with the working state of the Hall chip 701, thereby ensuring the detection accuracy of the position sensor 7.

[0057] In some embodiments, the top of the base 1 is connected with a cover plate 91, and a metal sheet is embedded in the cover plate 91 to improve the strength of the cover plate 91. It is worth noting that since the cover plate 91 of this embodiment is embedded with a metal sheet, the overall strength of the cover plate 91 is increased, which is conducive to reducing the thickness of the cover plate 91 while avoiding the problem of the cover plate 91 being insufficient in strength and easy to be damaged.

[0058] like Figure 6 As shown, specifically, the cover plate 91 is provided with a buckle 102, and the base 1 is provided with a slot 103; when the buckle 102 is matched and connected with the slot 103, the cover plate 91 is relatively fixed with the base 1. More specifically, the number of the buckles 102 and the slots 103 is 2, and the buckles 102 and the slots 103 are arranged in a one-to-one correspondence. It is worth noting that the number of the buckles 102 and the number of the slots 103 can be any integer greater than 2.

[0059] In some other specific embodiments, a glue layer is further provided between the cover plate 91 and the base 1, and the glue layer is formed by solidifying liquid glue, and the cover plate 91 and the base 1 are both fixedly connected to the glue layer. Exemplarily, when no glue layer is provided between the cover plate 91 and the base 1 or the liquid glue is not solidified, the cover plate 91 and the base 1 are detachably connected; when the liquid glue provided between the cover plate 91 and the base 1 is solidified, the cover plate 91 and the base 1 are fixedly connected. In this embodiment, by providing a glue layer, the assembly accuracy of the cover plate and the base is higher, and the firmness of the cover plate can be improved to prevent the waste plate from falling off due to external impact.

[0060] In some embodiments, the cover plate 91 is connected to an upper magnetic sheet 92; the upper magnetic sheet 92 is made of magnetic metal material and is used to magnetically absorb the first magnet 201; the base 1 is connected to a side magnetic sheet for magnetically absorbing the first magnet 201 and the second magnet 202, so that the first magnet 201 and the second magnet 202 drive the rotating bracket 4 to be close to one end of the peripheral side of the base 1. In this embodiment, the rotating bracket 4 is attracted to the initial position by the upper magnetic sheet 92 and the side magnetic sheet, so that the rotating axis 401 of the rotating bracket is aligned with the symmetric center of the blade 5.

[0061] In other embodiments, a lower magnetic sheet is connected to the bottom end of the base 1; the magnetic pole of the lower magnetic sheet facing the second magnet 202 is opposite in polarity to the magnetic pole of the second magnet 202 close to the lower magnetic sheet. In this embodiment, the second magnet 202 is sucked back to the initial position by the lower magnetic sheet to facilitate the initialization setting of the aperture. It is worth noting that the upper magnetic sheet 92 and the lower magnetic sheet can be set at the same time to increase the driving force for the rotating bracket 4. When the upper magnetic sheet 92 and the lower magnetic sheet are set at the same time, the upper magnetic sheet 92 is attracted to the first magnet 201, and the lower magnetic sheet repels the second magnet 202.

[0062] In some embodiments, the top of the cover plate 91 is detachably connected with a baffle 94, and the baffle 94 is provided with a coating, and an anti-reflection film is provided on the surface of the coating. The anti-reflection film is provided to reduce the influence of the reflected light on the incident side on the lens imaging; at the same time, the cost of directly providing a film layer on the cover plate 91 can be saved. Specifically, the outer edge of the baffle 94 is engaged with the inner side of the top of the cover plate 91; in other specific embodiments, the inner side of the top of the cover plate 91 is provided with a thread, and the outer edge of the cover plate 91 is connected with the top of the cover plate 91 by thread; in some other embodiments, the baffle 94 and the cover plate 91 can be provided as one piece.

[0063] In some embodiments, a rolling groove is further provided in the base 1, and the rolling groove is connected to the cavity 101; a rolling element is movably connected in the rolling groove, and the rolling element and the rotating bracket 4 are in rolling friction. Specifically, the number of the rolling elements is greater than or equal to the number of the rolling grooves; the rolling element is configured as a roller, and the circumference of the roller and the circumference of the rotating bracket 4 are in rolling friction. In other specific embodiments, the rolling element is configured as a ball, and the circumference of the ball and the circumference of the rotating bracket 4 are in rolling friction; any number of balls can be arranged in the same rolling groove. In this embodiment, the rolling friction between the provided rolling element and the rotating bracket 4 is conducive to reducing the friction force on the rotating bracket 4 during rotation, and is conducive to reducing the driving force for driving the blades 5 to rotate, and is suitable for miniaturized variable apertures.

[0064] This embodiment further provides a camera device, comprising the variable aperture according to any one of the above embodiments. Specifically, the camera device is a digital camera, a digital video camera, a film camera or a film video camera.

[0065] This embodiment further provides an electronic device, comprising the camera device described in any one of the above embodiments. Exemplarily, the electronic device is a mobile phone, a tablet computer or a laptop computer having the camera device described in this application.

[0066] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

[0067] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A variable aperture, characterized in that: include: A base, a first magnet, a second magnet, a coil, a rotating bracket and blades; The base is provided with a cavity for accommodating the first magnet, the second magnet, the coil and the rotating bracket; The base is movably connected to the rotating bracket; the base is relatively fixed to the coil; the first magnet and the second magnet are relatively fixed to the rotating bracket; The first magnet and the second magnet are adjacently arranged on the circumference of the rotating bracket, and the coil is arranged between the adjacent first magnet and the second magnet; when the direction of the Ampere force applied by the coil to the first magnet and the second magnet changes, the first magnet and the second magnet are both used to drive the rotating bracket to rotate; The plurality of blades are centrally symmetrically distributed on the top side of the rotating bracket; the rotating bracket and the base are both movably connected to the blades; when the rotating bracket rotates, the plurality of blades are driven to approach or move away from the rotating axis of the rotating bracket.

2. The aperture according to claim 1, characterized in that The winding axis of the coil is parallel to the rotation axis of the rotating support; When the first magnet and the second magnet are both configured as multi-level magnets, the first magnet includes a first magnet and a second magnet, and the opposite magnetic poles of the first magnet and the second magnet are located at the same end of the first magnet; the second magnet includes a third magnet and a fourth magnet, and the opposite magnetic poles of the third magnet and the fourth magnet are located at the same end of the second magnet; the magnetization directions of the first magnet, the second magnet, the third magnet and the fourth magnet are all arranged along the radial direction of the rotating bracket; the magnetic pole of the first magnet facing the coil is opposite to the magnetic pole of the second magnet facing the coil on the same side, so that the directions of the magnetic lines of force on both sides of the coil are opposite; When the first magnet and the second magnet are both configured as single-pole magnets, the magnetization directions of the first magnet and the second magnet are both configured along the circumference of the rotating bracket; the magnetic poles of the first magnet and the second magnet at the same end are opposite, so that the directions of the magnetic lines of force on both sides of the coil are opposite; When the energizing direction of the coil changes, the direction of the Ampere force applied by the coil to the first magnet and the second magnet changes, so as to drive the rotating bracket to rotate.

3. The aperture according to claim 2, characterized in that A accommodating groove is provided on the peripheral side of the rotating bracket, and at least a part of the coil protrudes into the accommodating groove.

4. The aperture according to claim 2, characterized in that The number of the coils, the first magnets and the second magnets is M, where M is an integer greater than 1; Each coil is electrically connected to two non-contacting energizing pins; the energizing pins are made of metal sheets.

5. The aperture according to claim 4, characterized in that The two energized pins connected to the same coil are commonly connected to a positioning column; the positioning column is arranged inside the coil; and the positioning column is made of a plastic block.

6. The aperture according to claim 5, characterized in that The base is connected with a positioning block; one end of the energized foot away from the coil is connected to the positioning block; and the positioning block is made of a plastic block.

7. The aperture according to claim 6, characterized in that The positioning block, the positioning column and the energizing pin are integrally formed through an injection molding process to form a coil bracket; the coil bracket is used to carry the coil.

8. The aperture according to claim 4, characterized in that It also includes a flexible circuit board, at least a portion of which is arranged around the circumferential side wall of the base, and the energizing pin is electrically connected to the flexible circuit board.

9. The aperture according to claim 8, characterized in that The energizing pin or the flexible circuit board is connected with a position sensor for detecting the position of the first magnet or the second magnet.

10. The aperture according to claim 9, characterized in that A composite reinforcing plate corresponding to the first magnet or the second magnet is disposed on the outside of the flexible circuit board, and the position sensor includes a Hall chip and a capacitor.

11. The aperture according to claim 1, characterized in that A gasket is provided at the top end of the rotating bracket, and the top end of the gasket is in contact with the blade to reduce the friction force when the blade moves.

12. The aperture according to claim 1, characterized in that It also includes a cover plate, which is cooperatively connected with the base; a metal sheet is embedded in the cover plate to improve the strength of the cover plate.

13. The aperture according to claim 12, characterized in that The cover plate is provided with a buckle, and the base is provided with a slot; when the buckle is matched and connected with the slot, the cover plate and the base are relatively fixed.

14. The aperture according to claim 12, characterized in that The cover plate is connected to an upper magnetic attraction sheet; the upper magnetic attraction sheet is made of a magnetic metal material and is used to magnetically attract the first magnet; The base is connected with a side magnetic attraction sheet for magnetically adsorbing the first magnet and / or the second magnet, so that the first magnet and the second magnet drive the rotating bracket to be close to one end of the peripheral side of the base.

15. The aperture according to claim 1, characterized in that A rolling groove is also provided in the base, and the rolling groove is communicated with the cavity; a rolling element is movably connected in the rolling groove, and when the rotating bracket is close to one end of the peripheral side of the base, the rolling element and the rotating bracket roll and rub.

16. The aperture according to claim 12, characterized in that The top of the cover plate is also connected with a baffle, the baffle is provided with a coating, and the surface of the coating is provided with an anti-reflection film.

17. A camera device, characterized in that: The invention comprises the variable aperture as claimed in any one of claims 1 to 16.

18. An electronic device, characterized in that: The imaging device comprising the imaging device according to claim 17.

Images