Variable aperture, camera apparatus, and electronic device

Abstract

The present invention provides a variable aperture, a camera apparatus, and an electronic device. 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 accommodating the first magnet, the second magnet, the coil, and the rotating support; the base is movably connected to the rotating support; the base is fixed relative to the coil; both the first magnet and the second magnet are fixed relative to the rotating support; the first magnet and the second magnet are arranged adjacent to each other on the peripheral side of the rotating support, and the coil is arranged between the adjacent first magnet and the adjacent second magnet; when the direction of an ampere force applied by the coil to the first magnet and the second magnet changes, both the first magnet and the second magnet are used for driving the rotating support to rotate; the plurality of blades are distributed on the top side of the rotating support in a central symmetry manner; both the rotating support and the base are movably connected to the blades; and when rotating, the rotating support is used for driving the plurality of blades to be close to or away from a rotating shaft of the rotating support. The variable aperture is used for improving a driving force for the blades.

Description

Variable aperture, camera device and electronic equipment Technical Field

[0001] The present invention relates to the field of optical lens equipment, and in particular to a variable aperture, a camera device and an electronic device. Background Art

[0002] Smartphones, tablets, and other electronic devices have become indispensable in our lives. With the continuous development of the electronics industry, their functions are becoming increasingly diverse and intelligent, with photography becoming a must-have feature. To achieve photographic effects similar to those of SLR cameras, camera modules are equipped with variable apertures that adjust the amount of light entering according to the shooting environment.

[0003] Existing magnetoelectric variable aperture irises consist of a fixed component, a rotating component, multiple blades, and a top cover. A magnet connected to the rotating component and a coil connected to the fixed component act to generate an electromagnetic driving force, causing the rotating component to rotate relative to the fixed component, thereby pushing the multiple blades open and close. After miniaturization, existing variable aperture irises have limited mounting space for the magnets, resulting in a weak magnetic thrust, making it difficult to drive the blades open and close, which can lead to a reduction in the yield of the variable aperture. Therefore, a new variable aperture, camera device, and electronic device are urgently needed to address these issues. Summary of the Invention

[0004] An object of the present invention is to provide a variable aperture, a camera device and an electronic device, wherein the variable aperture is used to increase the driving force on the blades.

[0005] In the first aspect, the present invention 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 both 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 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 both 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 rotation axis of the rotating bracket.

[0006] The beneficial effects of the device of the present invention are as follows: the present invention 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 several of the 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.

[0007] 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 configured 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 configured 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, so as to drive the rotating bracket to rotate.

[0008] 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.

[0009] 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 power pins; and the power pins are made of metal sheets.

[0010] Optionally, the two energized pins connected to the same coil are commonly connected to a positioning post; the positioning post is arranged on the inner side of the coil; and the positioning post is made of a plastic block.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Optionally, the energized pin or the flexible circuit board is connected to a position sensor for detecting the position of the first magnet or the second magnet.

[0015] 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.

[0016] 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 friction when the blade moves.

[0017] Optionally, a cover plate is further included, which is cooperatively connected to the base; a metal sheet is embedded in the cover plate to improve the strength of the cover plate.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] Optionally, a baffle is connected to the top of the cover plate, and the baffle is provided with a coating, and an anti-reflection film is applied to the coating surface. This has the beneficial effect of reducing the impact of reflected light from the incident side on the lens imaging by providing the anti-reflection film, while also saving the cost of directly providing the anti-reflection film on the cover plate.

[0022] In a second aspect, the present invention provides an imaging device comprising the variable aperture described in any one of the first aspects.

[0023] In a third aspect, the present invention provides an electronic device comprising the camera device according to any one of the second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is an exploded schematic diagram of a variable aperture provided by the present invention;

[0025] FIG2 is a schematic diagram of the installation position of a single-stage magnet and a coil provided by the present invention;

[0026] FIG3 is a schematic diagram of the installation positions of a multi-stage magnet and a coil provided by the present invention;

[0027] FIG4 is a schematic diagram of an installation structure of an energized foot provided by the present invention;

[0028] FIG5 is a perspective cross-sectional schematic diagram of a composite reinforcement plate provided by the present invention installed on a base;

[0029] FIG6 is a schematic diagram of an iris diaphragm with a buckle and a slot provided by the present invention.

[0030] Numbers in the figure:

[0031] 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 pin; 303. Positioning post; 304. Positioning block; 305. Winding axis; 4. Rotating bracket; 401. Rotating axis; 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; 92. Upper magnetic sheet; 93. Gasket; 94. Baffle. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The words "including" and similar words used in this article mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0035] 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 direction; 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 directional words are not used to limit the present invention.

[0036] In view of the problems existing in the prior art, the present invention provides a variable aperture as shown in FIG1 .

[0037] It includes: 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 several 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 vertical layers, with three centrally symmetrical blades 5 arranged in each layer. The blades 5 are rotatably connected to the base 1 and 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 symmetric center. It is worth noting that the number of 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 blades 5 to reduce friction when the blades 5 move. Specifically, the top surface of the gasket 93 contacts the bottom end surfaces of the three blades 5 located in the bottom layer.

[0040] As shown in Figure 2, 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 power-on 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] As shown in FIG3 , 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 magnetic 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 magnetic poles of the third magnet 213 and the fourth magnet 214 are located at the same end of the second 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 faces the coil 301 The magnetic poles of the second magnet and the first magnet 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 multiplied, 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 can be different magnetization regions of the first magnet 201 , and the third magnet 213 and the fourth magnet 214 can be different magnetization regions of the second magnet 202 .

[0043] For example, as shown in FIG4 , 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 to each other.

[0044] In other examples, the first direction end of the first magnet 201 is the N pole, and the second direction end of the first magnet 201 is the S pole; the first direction end of the second magnet 202 is the S pole, and the second direction end of the second magnet 202 is the 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 circular. The first magnet 201 and the second magnet 202 are both crescent-shaped. The first magnet 201 and the second magnet 202 have the same length, both 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 rectangular with rounded corners. The first magnet 201 and the second magnet 202 are both fan-shaped.

[0047] Specifically, a accommodating groove 402 is formed on the circumferential side of the rotating bracket 4, and the portion of the coil 301 facing the rotating bracket 4 protrudes into the accommodating groove 402. In other specific embodiments, the first magnet 201 is connected to the top surface of the accommodating groove 402, and the second magnet 202 is connected to the bottom surface of the accommodating groove 402. This embodiment can reduce the volume required for the coil 301, which is beneficial for reducing the size of the base 1. While maintaining the size of the base 1 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 beneficial for improving 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] In one example, the number of coils 301, first magnets 201, and second magnets 202 is 2. In other examples, the number of coils 301, first magnets 201, and second magnets 202 is an integer greater than 1. Each coil 301 is electrically connected to two non-contacting energized pins 302; the energized pins 302 are made of bent metal sheets, and the coils 301 are made of enameled wire. This embodiment prevents short circuits between adjacent energized pins 302.

[0050] Specifically, the two energized pins 302 connected to the same coil 301 are commonly connected to a positioning post 303; the positioning post 303 is located inside the coil 301 and is made of a plastic block. In other specific embodiments, the base 1 is connected to a positioning block 304; the 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. 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 away from the base 1 and 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; 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 for detecting the position of the first magnet 201 or the second magnet 202. In still other embodiments, the flexible circuit board 6 is connected to the position sensor 7. This embodiment can reduce the electrical connection circuitry required for the position sensor 7, thereby reducing the size of the variable aperture.

[0056] As shown in Figure 5, in some embodiments, a composite reinforcement plate 8 is provided on the outside of the flexible circuit board 6, corresponding to the first magnet 201 or the second magnet 202. The composite reinforcement plate 8 includes a magnetic conductive region 801 and a non-magnetic conductive region 802. The position sensor 7 includes a Hall chip 701 and a capacitor. The Hall chip 701 is located near the non-magnetic conductive region 802 and away from the magnetic conductive region 801. This embodiment prevents the magnetic conductive region 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 to a cover plate 91, and a metal sheet is embedded in the cover plate 91 to enhance the strength of the cover plate 91. It is worth noting that the embedded metal sheet in the cover plate 91 of this embodiment increases the overall strength of the cover plate 91, thereby reducing the thickness of the cover plate 91 and avoiding the problem of insufficient strength and easy damage to the cover plate 91.

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

[0059] In other specific embodiments, a glue layer is further provided between the cover plate 91 and the base 1. 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. For example, when no glue layer is provided between the cover plate 91 and the base 1 or the liquid glue has not been 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 has been solidified, the cover plate 91 and the base 1 are fixedly connected. By providing a glue layer, this embodiment allows for higher assembly precision between the cover plate and the base, thereby improving the firmness of the cover plate and preventing waste plates from falling off due to external impacts.

[0060] In some embodiments, the cover plate 91 is connected to an upper magnetic sheet 92; the upper magnetic sheet 92 is made of a magnetic metal material and is used to magnetically attract the first magnet 201. The base 1 is connected to a side magnetic sheet for magnetically attracting 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 a peripheral end of the base 1. In this embodiment, the upper magnetic sheet 92 and the side magnetic sheet attract the rotating bracket 4 to the initial position, facilitating alignment of the rotating bracket's rotation axis 401 with the symmetrical 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, which facilitates 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 on 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, a baffle 94 is detachably connected to the top of the cover plate 91. The baffle 94 is provided with a coating, and an anti-reflection film is applied to the surface of the coating. The anti-reflection film reduces the impact of reflected light from the incident side on lens imaging; at the same time, it can save the cost of directly applying the film layer on the cover plate 91. Specifically, the outer edge of the baffle 94 engages 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 threads, and the outer edge of the cover plate 91 is threadedly connected to the top of the cover plate 91. In still other embodiments, the baffle 94 and the cover plate 91 can be integrally provided.

[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 provided in the same rolling groove. In this embodiment, the rolling friction between the provided rolling element and the rotating bracket 4 is beneficial to reducing the friction force on the rotating bracket 4 during rotation, and is beneficial 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 according to any one of the above embodiments. Exemplarily, the electronic device is a mobile phone, tablet computer, or laptop computer having the camera device according to this application.

[0066] While the embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations of these embodiments are possible. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the claims. Furthermore, the invention described herein is susceptible to other embodiments and may be practiced or implemented in a variety of ways.

[0067] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0068] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

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: Includes the camera device according to claim 17.

Images