Variable aperture, camera module and electronic equipment

Abstract

The invention provides a variable aperture, a camera module and electronic equipment. The variable aperture comprises a base, a rotating support rotationally connected to the base, a plurality of blades rotationally connected to the base and slidably connected to the rotating support, and a magnetic circuit structure used for driving the rotating support to rotate, a first through hole is formed in the base, a second through hole is formed in the rotating support, and an aperture hole is defined by the blades. The first through hole, the second through hole and the aperture hole are aligned; the magnetic circuit structure comprises a first magnet and a second magnet which are fixedly connected to the base and are sequentially arranged at an interval along a first direction, a coil which is fixedly assembled on the rotating bracket and surrounds the peripheral side of the first magnet and / or the second magnet, and a magnetic conducting piece which is fixed on the base and is arranged on one side, deviating from the first magnet and / or the second magnet, of the coil; and the magnetizing directions of the first magnet and the second magnet are opposite and are parallel to the first direction. Magnetic fields generated by the first magnet and the second magnet are concentrated to the coil, and the whole coil is located in a magnetic field effective area.

Description

Technical field

[0001] The present invention belongs to the field of camera technology, and in particular relates to a variable aperture, a camera module and an electronic device. [Background Technology]

[0002] Mobile phones and other electronic devices are equipped with camera modules. These modules dynamically adjust the amount of light entering the camera by changing the aperture size of the variable aperture to adapt to different lighting environments. In related technologies, electromagnetic drive is typically used to change the aperture size of the variable aperture. Traditional variable apertures employ a Haier shell-like arrangement of magnet structures to form a long strip-shaped magnet structure. Furthermore, a square coil is positioned above the magnet structure. This arrangement ensures that only the two opposing short sides of the coil can provide effective driving force, which can easily result in ineffective coil length and low coil power and magnetic field utilization.

[0003] Therefore, it is necessary to provide a variable aperture diaphragm with a new magnetic circuit structure. [Summary of the invention]

[0004] The object of the present invention is to provide a magnetic circuit structure that can place the entire coil in an effective magnetic field area, thereby increasing the power and magnetic circuit utilization of the coil and providing greater driving force.

[0005] The technical solutions of the present invention are as follows:

[0006] According to a first aspect of the present invention, there is provided a variable aperture, comprising a base, a rotating bracket rotatably connected to the base, a plurality of blades rotatably connected to the base and slidably connected to the rotating bracket, and a magnetic circuit structure for driving the rotating bracket to rotate, wherein the base is formed with a first through hole, the rotating bracket is formed with a second through hole, the plurality of blades are combined to form an aperture hole, and the first through hole, the second through hole and the aperture hole are aligned; the magnetic circuit structure comprises a first magnet and a second magnet fixedly connected to the base and arranged in sequence along a first direction, a coil fixedly assembled on the rotating bracket and surrounding the outer periphery of the first magnet and / or the second magnet, and a magnetic conductive member fixed to the base and arranged on the side of the coil away from the first magnet and / or the second magnet; and the magnetization directions of the first magnet and the second magnet are opposite and both are parallel to the first direction.

[0007] Furthermore, in some embodiments, the magnetic circuit structure also includes at least one third magnet; the third magnet is fixed to one end of the first magnet along the magnetization direction and assembled between the first magnet and the magnetic conductive member, and the magnetization direction of the third magnet points to the first magnet; and / or, the third magnet is fixed to one end of the second magnet along the magnetization direction and assembled between the second magnet and the magnetic conductive member, and the magnetization direction of the third magnet points to the second magnet.

[0008] Furthermore, in some embodiments, the magnetic conductive member includes a first magnetic conductive sheet arranged on the side of the coil away from the first magnet; the third magnet is fixedly assembled between the first magnet and the first magnetic conductive sheet; and / or the third magnet is fixedly assembled between the second magnet and the first magnetic conductive sheet.

[0009] Furthermore, in some embodiments, the magnetization direction of the third magnet is orthogonal to the magnetization direction of the first magnet, and the magnetic pole of the third magnet close to one end of the first magnet is opposite to the magnetic pole of the first magnet close to one end of the third magnet; and / or, the magnetization direction of the third magnet is orthogonal to the magnetization direction of the second magnet, and the magnetic pole of the third magnet close to one end of the second magnet is opposite to the magnetic pole of the second magnet close to one end of the third magnet.

[0010] Furthermore, in some embodiments, the magnetic conductive component also includes a second magnetic conductive sheet connected to the first magnetic conductive sheet and arranged orthogonally to the first magnetic conductive sheet; the third magnet is fixedly assembled between the first magnet and the second magnetic conductive sheet, and / or the third magnet is fixedly assembled between the second magnet and the second magnetic conductive sheet.

[0011] Furthermore, in some embodiments, the magnetic circuit structure further includes an iron core fixedly connected to the base, and the first magnet and the second magnet are connected along the first direction through the iron core.

[0012] Furthermore, in some embodiments, the variable aperture includes a plurality of magnetic circuit structures spaced apart along the circumference of the base.

[0013] Furthermore, in some embodiments, a receiving space separated from the first through hole is formed between the base and the rotating bracket, and the magnetic circuit structure is at least partially assembled in the receiving space; and a first sliding groove connected to the receiving space and extending circumferentially is provided on the outer peripheral side of the base, and the rotating bracket protrudes axially on one side of the base, and the first sliding groove moves along the first sliding groove; the side of the coil radially away from the first magnet and / or the second magnet is fixedly connected to the side of the first sliding groove facing the receiving space.

[0014] A second aspect of the present invention provides a camera module, comprising a lens module and a variable aperture, wherein the variable aperture is fixedly connected to the lens module, and the variable aperture is located on the light-incoming side of the lens of the lens module.

[0015] A third aspect of the present invention provides an electronic device including a camera module.

[0016] The present invention has the beneficial effects of: a variable aperture iris comprising a base, a rotating bracket, a plurality of blades, and a magnetic circuit structure, wherein the magnetic circuit structure can drive the rotating bracket to rotate, and the rotating bracket can drive the blades to rotate and slide relative to the base. That is, the magnetic circuit structure can control the movement of the plurality of blades at intervals, thereby adjusting the size of the aperture formed by the plurality of blades, and thus adjusting the amount of light entering. The magnetic circuit structure includes a first magnet and a second magnet arranged in sequence along a first direction, so that the first magnet and the second magnet form an elongated magnet structure. Compared with a ring-shaped magnet structure, the spacing between the magnets in the elongated magnet structure can be smaller, thereby generating a greater magnetic field strength. In addition, a coil surrounds the outer periphery of the first magnet and / or the second magnet, and the first magnet and the second magnet are magnetized in opposite directions, that is, the magnetic poles of the first magnet and the second magnet at the ends closer to each other in the first direction are the same. Moreover, a magnetic conductive member is provided on the side of the coil facing away from the magnet. Thus, when the coil is energized, the magnetic field generated by the first magnet and the second magnet can be concentrated on the coil, so that the entire coil is within the effective magnetic field area, thereby improving magnetic field utilization and enhancing driving force. Furthermore, the first and second magnets are fixed relative to the base, while the coil and the rotating bracket are relatively fixed. When the coil is energized, the coil and magnet interact, causing the rotating bracket to rotate as the coil rotates. Compared to magnets, the coil is lighter, making the coil and the rotating bracket rotate more sensitively, allowing the variable aperture to start and stop quickly during power-on operation. Furthermore, during aperture adjustment, the blades follow the coil's movement to quickly reach the designated position, achieving zero-delay adjustment. Furthermore, when adjusting the aperture to reach the designated position, the blades can experience minimal or no vibration, achieving a precise aperture value. This reduces the operating time and number of closed-loop control interventions, saving power.

Brief Description of the Drawings

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the magnetic circuit structure of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the magnetic circuit structure of the present invention;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction;

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the variable aperture of the present invention;

[0021] Figure 5 A schematic diagram of a portion of the structure of the variable aperture of the present invention;

[0022] Figure 6 This is an exploded view of the variable aperture of the present invention.

[0023] In the accompanying drawings, each reference numeral represents:

[0024] 10. Magnetic circuit structure; 1. First magnet; 2. Second magnet; 3. Coil; 4. Magnetic conductive element; 41. First magnetic conductive sheet; 42. Second magnetic conductive sheet; 5. Third magnet; 6. Iron core;

[0025] 20. Base; 201. First through hole; 202. First slide groove; 203. Rotation axis;

[0026] 30. Rotating bracket; 301. Second through hole; 302. First slider; 303. Connecting column;

[0027] 40, blade; 401, aperture hole; 402, rotation hole; 403, sliding hole;

[0028] 50. Cover body; 501. Third through hole. [Specific implementation method]

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] See Figures 1 to 6 A variable aperture diaphragm includes a base 20, a rotating bracket 30 rotatably connected to the base 20, a plurality of blades 40 rotatably connected to the base 20 and slidably connected to the rotating bracket 30, and a magnetic circuit structure 10 for driving the rotating bracket 30 to rotate, wherein the base 20 is formed with a first through hole 201, the rotating bracket 30 is formed with a second through hole 301, and the plurality of blades 40 enclose an aperture hole 401, and the first through hole 201, the second through hole 301 and the aperture hole 401 are aligned and arranged; the magnetic circuit structure 10 includes a first magnet 1 and a second magnet 2 fixedly connected to the base 20 and arranged in sequence along a first direction, a coil 3 fixedly assembled on the rotating bracket 30 and surrounding the outer periphery of the first magnet 1 and / or the second magnet 2, and a magnetic conductive member 4 fixed to the base 20 and arranged on a side of the coil 3 facing away from the first magnet 1 and / or the second magnet 2; and the magnetization directions of the first magnet 1 and the second magnet 2 are opposite and parallel to the first direction.

[0033] In an embodiment of the present invention, the variable aperture includes a base 20, a rotating bracket 30, a plurality of blades 40, and a magnetic circuit structure 10, wherein the magnetic circuit structure 10 can drive the rotating bracket 30 to rotate, and the rotating bracket 30 can drive the blades 40 to rotate relative to the base 20 and slide relative to the rotating bracket 30, that is, the movement of the plurality of blades 40 can be controlled at intervals by the magnetic circuit structure 10, so that the size of the aperture hole 401 formed by the plurality of blades 40 can be adjusted, and thus can be used to adjust the amount of light entering. The magnetic circuit structure 10 includes a first magnet 1 and a second magnet 2 arranged in sequence along a first direction, so that the first magnet 1 and the second magnet 2 form a long strip magnet structure. Compared with the ring magnet structure, the spacing between the magnets of the long strip magnet structure can be smaller, so that the magnetic field strength generated can be greater. In addition, the coil 3 is wrapped around the outer circumference of the first magnet 1 and / or the second magnet 2, and the magnetization directions of the first magnet 1 and the second magnet 2 are opposite, that is, the magnetic poles of the first magnet 1 and the second magnet 2 at one end close to each other along the first direction are the same, and a magnetic conductive member 4 is provided on the side of the coil 3 away from the magnet. In this way, after the coil 3 is energized, the magnetic field generated by the first magnet 1 and the second magnet 2 can be concentrated on the coil 3, so that the entire coil 3 is in the effective magnetic field area, which can improve the utilization rate of the magnetic field and enhance the driving force. In addition, the first magnet 1 and the second magnet 2 are fixed relative to the base 20, and the coil 3 and the rotating bracket 30 are relatively fixed. After the coil 3 is energized, the coil 3 and the magnet are inductively coupled, so that the rotating bracket 30 is driven to rotate by the rotation of the coil 3. Compared with the magnet, the coil 3 is light in weight, so the rotation process of the coil 3 and the rotating bracket 30 can be more sensitive, and the start and stop speed of the variable aperture during power-on operation is fast; at the same time, in the process of adjusting the size of the aperture hole 401, the blade 40 follows the movement of the coil 3 to quickly reach the specified position, achieving the effect of zero-delay adjustment; and, when the size of the aperture hole 401 is adjusted so that the blade 40 reaches the specified position, the blade 40 can shake slightly or even not shake at all, achieving the effect of accurate aperture value, and can reduce the running time and number of closed-loop control interventions, saving power consumption.

[0034] It is understandable that the magnetic circuit structure 10 of the embodiment of the present invention can also be connected to other structural components in the variable aperture in other ways. For example, in the variable aperture, the coil 3 is fixedly assembled on the base 20, and the first magnet 1 and the second magnet 2 are fixedly assembled on the rotating bracket 30, so that the rotating bracket 30 is driven to rotate by the first magnet 1 and the second magnet 2, and the blade 40 can also be driven to move by the rotating bracket 30. In addition, the entire coil 3 can be placed in the effective magnetic field area, which can improve the utilization rate of the magnetic field and enhance the driving force. It can also enable the magnetic circuit structure 10 to better drive the rotating bracket 30, and then better drive the blade 40, and better adjust the size of the aperture hole 401. It will not be described in detail here.

[0035] It is understandable that the magnetic circuit structure 10 of the embodiment of the present invention can also be applied to other variable apertures. For example, in addition to the base 20, the rotating bracket 30, and the blades 40, the variable aperture may also include structural components such as ball bearings. Similarly, by adopting the magnetic circuit structure 10 of the embodiment of the present invention, the entire coil 3 can be placed in the effective magnetic field area, which can improve the utilization rate of the magnetic field and enhance the driving force. It can also enable the magnetic circuit structure 10 to better drive the rotating bracket 30, and thus better drive the blades 40, and better adjust the size of the aperture hole 401. This will not be elaborated here.

[0036] Further, see Figures 1 to 3 ,as well as Figure 6 In some specific embodiments, the magnetization directions of the first magnet 1 and the second magnet 2 are parallel to the first direction, and the magnetization direction of the first magnet 1 points to the second magnet 2, and the magnetization direction of the second magnet 2 points to the first magnet 1, that is, the first magnet 1 and the second magnet 2 are arranged with their N poles facing each other; and because the coil 3 is arranged between the first magnet 1 and the second magnet 2 and is located on the outer periphery of the magnets, when the coil 3 is energized, the magnetic fields generated by the first magnet 1 and the magnetic fields generated by the second magnet 2 can be better and more directly concentrated on the coil 3, thereby better improving the magnetic field utilization and further enhancing the driving force.

[0037] Further, see Figures 1 to 3 The magnetic circuit structure 10 also includes at least one third magnet 5; the third magnet 5 is fixed to one end of the first magnet 1 along the magnetization direction and assembled between the first magnet 1 and the magnetic conductive member 4, and the magnetization direction of the third magnet 5 points to the first magnet 1; and / or, the third magnet 5 is fixed to one end of the second magnet 2 along the magnetization direction and assembled between the second magnet 2 and the magnetic conductive member 4, and the magnetization direction of the third magnet 5 points to the second magnet 2.

[0038] In some embodiments, the magnetic conductive member 4 is arranged on the side of the coil 3 away from the magnet, wherein there is a first assembly gap between the magnetic conductive member 4 and the first magnet 1, and at least one third magnet 5 can be arranged in the first assembly gap and at one end of the first magnet 1 along the magnetization direction, and the magnetization direction of the third magnet 5 points to the first magnet 1, and the magnetic pole of the end of the third magnet 5 close to the first magnet 1 is opposite to the magnetic pole of the end of the first magnet 1 close to the third magnet 5. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the first magnet 1 can be superimposed, thereby enhancing the magnetic field strength and further enhancing the driving force.

[0039] In some embodiments, there is a second assembly gap between the magnetic conductive member 4 and the second magnet 2. Similarly, at least one third magnet 5 can be arranged in the second assembly gap and at one end of the second magnet 2 along the magnetization direction. At the same time, the magnetization direction of the third magnet 5 points to the second magnet 2, and the magnetic pole of the end of the third magnet 5 close to the second magnet 2 is opposite to the magnetic pole of the end of the second magnet 2 close to the third magnet 5. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the second magnet 2 can be superimposed, thereby enhancing the magnetic field strength and further enhancing the driving force.

[0040] In some embodiments, at least one third magnet 5 can be set in the first assembly gap, and at least one third magnet 5 can be set in the second assembly gap. In this way, the magnetic field strength can be further enhanced, and the driving force can be further enhanced. It will not be elaborated here.

[0041] Further, see Figures 1 to 3 ,as well as Figure 6 In some specific embodiments, the magnetic conductive member 4 is arranged on the side of the coil 3 away from the magnet, wherein a first assembly gap is provided between the magnetic conductive member 4 and the first magnet 1, and at least one third magnet 5 can be provided in the first assembly gap, and the third magnet 5 is arranged at the end of the first magnet 1 away from the coil 3 in the magnetization direction, and at the same time, the N pole of the third magnet 5 points to the S pole of the first magnet 1, and the S pole of the third magnet 5 faces the magnetic conductive member 4. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the first magnet 1 can be superimposed, and the superimposed magnetic lines of force can be directly concentrated on the coil 3, thereby enhancing the magnetic field strength, and providing magnetic field utilization, thereby better enhancing the driving force.

[0042] In some specific embodiments, there is a second assembly gap between the magnetic conductive member 4 and the second magnet 2. Similarly, at least one third magnet 5 can be arranged in the second assembly gap, and the third magnet 5 is arranged at the end of the second magnet 2 away from the coil 3 in the magnetization direction, and the N pole of the third magnet 5 points to the S pole of the second magnet 2, and the S pole of the third magnet 5 faces the magnetic conductive member 4. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the second magnet 2 can be superimposed, and the superimposed magnetic lines of force can be directly concentrated on the coil 3, thereby enhancing the magnetic field strength, and providing magnetic field utilization, thereby better enhancing the driving force.

[0043] Further, see Figures 1 to 3 ,as well as Figure 6 In some embodiments, the magnetic conductive member 4 includes a first magnetic conductive sheet 41 arranged on the side of the coil 3 away from the first magnet 1; the third magnet 5 is fixedly assembled between the first magnet 1 and the first magnetic conductive sheet 41; and / or, the third magnet 5 is fixedly assembled between the second magnet 2 and the first magnetic conductive sheet 41.

[0044] Exemplarily, the first magnetic conductive sheet 41 is arranged on the side of the coil 3 away from the magnet. The first magnetic conductive sheet 41 is in the shape of an elongated strip. In addition, the first magnetic conductive sheet 41 extends from one end of the first magnet 1 to the position where the first magnet 1 and the second magnet 2 are close to each other, and then continues to extend to the other end of the second magnet 2. Therefore, the outer sides of the first magnet 1 and the second magnet 2 are both provided with a magnetic conductive structure, so that the magnetic field generated by the first magnet 1 and the magnetic field generated by the second magnet 2 can be concentrated by the first magnetic conductive sheet 41, so that the magnetic fields generated by the first magnet 1 and the second magnet 2 are all concentrated on the coil 3, which can improve the utilization rate of the magnetic field and enhance the driving force. In addition, by arranging the third magnet 5 between the first magnetic conductive sheet 41 and the first magnet 1 and / or between the first magnetic conductive sheet 41 and the second magnet 2, the magnetic field strength of the first magnet 1 and / or the second magnet 2 can be enhanced, which can enhance the driving force.

[0045] In other embodiments, the first magnetic conductive sheet 41 can extend from one end of the first magnet 1 to the position where the first magnet 1 and the second magnet 2 are close to each other, and then continue to extend to the middle position of the second magnet 2 along the length direction, which can also concentrate the magnetic field generated by the first magnet 1 and the magnetic field generated by the second magnet 2.

[0046] Further, see Figures 1 to 3 ,as well as Figure 6 In some embodiments, the magnetization direction of the third magnet 5 is orthogonal to the magnetization direction of the first magnet 1, and the magnetic pole of the third magnet 5 near the end of the first magnet 1 is opposite to the magnetic pole of the first magnet 1 near the end of the third magnet 5; and / or, the magnetization direction of the third magnet 5 is orthogonal to the magnetization direction of the second magnet 2, and the magnetic pole of the third magnet 5 near the end of the second magnet 2 is opposite to the magnetic pole of the second magnet 2 near the third magnet 5.

[0047] Specifically, the first magnetic conductive sheet 41 is in the shape of an elongated strip, and the surface of the first magnetic conductive sheet 41 is arranged parallel to one surface of the first magnet 1; a third magnet 5 can be arranged between the first magnet 1 and the first magnetic conductive sheet 41, so that one end of the third magnet 5 points to the surface of the first magnet 1 and the other end points to the surface of the first magnetic conductive sheet 41, and the magnetization direction of the third magnet 5 is arranged orthogonal to the magnetization direction of the first magnet 1, and the magnetic poles of the third magnet 5 and the first magnet 1 at the adjacent ends are opposite, so that the magnetic lines of force of the third magnet 5 and the magnetic lines of force of the first magnet 1 can be superimposed, and the superposition effect can be better, thereby better enhancing the magnetic field strength and generating a stronger driving force. In addition, the surface of the first magnetic conductive sheet 41 is also arranged parallel to a surface of the second magnet 2, and a third magnet 5 can be arranged between the second magnet 2 and the first magnetic conductive sheet 41, so that one end of the third magnet 5 points to the surface of the second magnet 2 and the other end points to the surface of the first magnetic conductive sheet 41, and the magnetization direction of the third magnet 5 is arranged orthogonal to the magnetization direction of the second magnet 2, and the magnetic poles of the third magnet 5 and the second magnet 2 at the close ends are opposite. In this way, the magnetic lines of force of the third magnet 5 and the magnetic lines of force of the second magnet 2 can be superimposed, and the superposition effect can be better, thereby better enhancing the magnetic field strength and generating a stronger driving force.

[0048] It is understandable that the embodiment of the present invention does not limit the angular relationship between the magnetizing direction of the third magnet 5 and the magnetizing direction of the first magnet 1, and the magnetizing direction of the third magnet 5 and the magnetizing direction of the second magnet 2. The degree of superposition of the magnetic lines of force can be adjusted by changing each angle.

[0049] Furthermore, in some specific embodiments, a third magnet 5 can be arranged between the first magnet 1 and the first magnetic conductive sheet 41, and the third magnet 5 is arranged at the end of the first magnet 1 away from the coil 3 in the magnetization direction. At the same time, the third magnet 5 and the first magnet 1 are arranged orthogonally, and the N pole of the third magnet 5 points to the S pole of the first magnet 1, and the S pole of the third magnet 5 faces the first magnetic conductive sheet 41. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the first magnet 1 can be superimposed, and the superimposed magnetic lines of force can be directly concentrated on the coil 3, thereby enhancing the magnetic field strength, and can provide magnetic field utilization, thereby better enhancing the driving force.

[0050] In some specific embodiments, a third magnet 5 can be arranged between the second magnet 2 and the first magnetic conductive sheet 41, and the third magnet 5 is arranged at the end of the second magnet 2 away from the coil 3 in the magnetization direction. At the same time, the third magnet 5 and the second magnet 2 are arranged orthogonally, and the N pole of the third magnet 5 points to the S pole of the second magnet 2, and the S pole of the third magnet 5 faces the first magnetic conductive sheet 41. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the second magnet 2 can be superimposed, and the superimposed magnetic lines of force can be directly concentrated on the coil 3, thereby enhancing the magnetic field strength, and providing magnetic field utilization, thereby better enhancing the driving force.

[0051] Further, see Figures 1 to 3 ,as well as Figure 6 In some embodiments, the magnetic conductive member 4 further includes a second magnetic conductive sheet 42 connected to the first magnetic conductive sheet 41 and arranged orthogonally to the first magnetic conductive sheet 41; the third magnet 5 is fixedly assembled between the first magnet 1 and the second magnetic conductive sheet 42, and / or the third magnet 5 is fixedly assembled between the second magnet 2 and the second magnetic conductive sheet 42.

[0052] Exemplarily, the magnetic conductive member 4 also includes a second magnetic conductive sheet 42 arranged orthogonally to the first magnetic conductive sheet 41. The second magnetic conductive sheet 42 also extends along the length direction of the first magnet 1, wherein the second magnetic conductive sheet 42 extends from one end of the first magnet 1 to the position where the first magnet 1 and the second magnet 2 are close to each other, and then continues to extend to the middle position of the second magnet 2 along the length direction. It can also make the magnetic lines of force generated by the first magnet 1 be concentrated on the coil 3, and can also guide the magnetic lines of force generated by the second magnet 2 to be concentrated toward the position of the coil 3. In addition, by arranging a third magnet 5 between the first magnetic conductive sheet 41 and the first magnet 1 and / or between the first magnetic conductive sheet 41 and the second magnet 2, the magnetic field strength of the first magnet 1 and / or the second magnet 2 is enhanced, and the driving force can be enhanced.

[0053] In other embodiments, the second magnetic conductive sheet 42 can extend from one end of the first magnet 1 to the position where the first magnet 1 and the second magnet 2 are close to each other, and then continue to extend to the other end of the second magnet 2; similarly, the second magnetic conductive sheet 42 can concentrate the magnetic field generated by the first magnet 1 and the magnetic field generated by the second magnet 2.

[0054] Furthermore, in some specific embodiments, a third magnet 5 can be arranged between the first magnet 1 and the second magnetic conductive sheet 42, and the third magnet 5 is arranged at the end of the first magnet 1 away from the coil 3 in the magnetization direction. At the same time, the third magnet 5 and the second magnet 2 are arranged orthogonally, and the N pole of the third magnet 5 points to the S pole of the first magnet 1, and the S pole of the third magnet 5 faces the second magnetic conductive sheet 42. In this way, after the coil 3 is energized, the magnetic lines of force generated by the third magnet 5 and the magnetic lines of force generated by the first magnet 1 can be superimposed, and the superimposed magnetic lines of force can be directly concentrated on the coil 3, thereby enhancing the magnetic field strength, and providing magnetic field utilization, thereby better enhancing the driving force.

[0055] It is understandable that the embodiment of the present invention does not limit the angular relationship between the magnetizing direction of the third magnet 5 and the magnetizing direction of the first magnet 1, and the magnetizing direction of the third magnet 5 and the magnetizing direction of the second magnet 2. The degree of superposition of the magnetic lines of force can be adjusted by changing each angle.

[0056] Further, see Figures 1 to 3 ,as well as Figure 6 In some embodiments, the magnetic circuit structure 10 further includes an iron core 6 fixedly connected to the base 20 , and the first magnet 1 and the second magnet 2 are connected along the first direction through the iron core 6 .

[0057] Specifically, an iron core 6 may be disposed between the first magnet 1 and the second magnet 2, with the coil 3 wrapped around the outer periphery of the iron core 6. Since the iron core 6 is made of paramagnetic material with a high magnetic permeability, when the iron core 6 is inserted into the energized coil 3, it is magnetized by the magnetic field of the energized coil 3, greatly increasing the magnetic induction intensity within the iron core 6. The magnetized iron core 6 also becomes a magnet. The magnetic field generated by the iron core 6 can then be superimposed on the magnetic fields generated by the first magnet 1 and the second magnet 2, thereby further enhancing the magnetic field strength and thus the driving force.

[0058] Further, see Figures 1 to 6 In some embodiments, the variable aperture includes a plurality of magnetic circuit structures 10 spaced apart circumferentially along the base 20. By providing multiple magnetic circuit structures 10, the coils 3 of the multiple magnetic circuit structures 10 can simultaneously control a single rotating bracket 30, thereby improving the driving effect on the rotating bracket 30. Furthermore, because the multiple magnetic circuit structures 10 are spaced apart, the driving force applied to each portion of the rotating bracket 30 along the circumference is more balanced, thereby enabling better rotation.

[0059] Further, see Figures 1 to 6In some specific embodiments, the blade 40 defines a rotation hole 402 and a sliding hole 403 spaced apart from the rotation hole. A rotation shaft 203 protrudes axially from the center of the base 20, and a connecting post 303 protrudes axially from the body of the rotating bracket 30. The rotation hole 402 of the blade 40 is sleeved on the rotation shaft 203, while the sliding hole 403 of the blade 40 is sleeved on the connecting post 303. When the coil 3 is energized, the connecting post 303 of the rotating bracket 30 and the rotation hole 402 of the blade 40 act together, causing the rotating bracket 30 to drive the blade 40 to rotate. Simultaneously, the rotation hole 402 of the blade 40 also rotates about the rotation shaft 203 of the base 20. Consequently, the blade 40 rotates about the rotation shaft 203 of the base 20 while sliding relative to the rotating bracket 30 along the extension direction of the sliding hole 403, thereby adjusting the size of the aperture 401.

[0060] Further, see Figures 1 to 6 In some specific embodiments, a receiving space is formed between the base 20 and the rotating bracket 30, which is separated from the first through hole 201, and the magnetic circuit structure 10 is at least partially assembled in the receiving space; and a first sliding groove 202 is opened on the outer peripheral side of the base 20, which is connected to the receiving space and extends circumferentially. The rotating bracket 30 has a first slider 302 protruding from the side axially toward the base 20, and the first slider 302 moves along the first sliding groove 202; the side of the coil 3 radially away from the first magnet 1 and / or the second magnet 2 is fixedly connected to the side of the first slider 302 facing the receiving space.

[0061] Specifically, the base 20 may include an axially arranged base body, a central portion protruding axially from the base body, and a first sidewall disposed on the circumference of the base body. The first slide groove 202 may be provided on the sidewall, and the first through hole 201 may be provided in the central portion. The first sidewall may specifically include two spaced-apart protrusions, with the first slide groove 202 formed by the two protrusions. Furthermore, the rotating bracket 30 may include an axially arranged base body and a second sidewall disposed on the circumference of the base body, with the first slider 302 formed on the second sidewall. A receiving space may be formed between the outer side of the central portion, the inner side of the first sidewall of the base 20, and the inner side of the second sidewall of the rotating bracket 30. The coil 3, the first magnet 1, and the second magnet 2 may be disposed within the receiving space, and the coil 3 may be fixedly connected to the inner side of the first slider 302 of the rotating bracket 30, thereby achieving a fixed connection between the coil 3 and the rotating bracket 30. In addition, after the coil 3 is energized, the center of the first through hole 201, the second through hole 301, and the aperture hole 401 is used as the rotation axis 203, and the coil 3 can drive the rotating bracket 30 to rotate. At this time, the first slider 302 moves in the first slide groove 202, and the rotating bracket 30 can be rotated relative to the base 20.

[0062] Further, see Figures 1 to 6In some embodiments, the adjustable aperture further includes a cover body 50 fixed relative to the side wall of the base 20 and covering the side of the blade 40 away from the rotating bracket 30. The cover body 50 is provided with a third through hole 501 aligned with the first through hole 201. In this way, the blade 40 can be protected and the service life of the adjustable aperture can be improved.

[0063] A camera module comprises a lens module and a variable aperture. The variable aperture is fixedly connected to the lens module and is located on the low beam side of the lens of the lens module.

[0064] Specifically, the lens module has a lens, and the variable aperture is fixed to the lens module and is located on the low beam side of the lens. In this way, the size of the aperture hole 401 of the variable aperture can be adjusted to adjust the amount of light entering the lens, thereby achieving better photographic effects in different environments.

[0065] In addition, the first magnet 1 and the second magnet 2 of the embodiment of the present invention form an elongated magnet structure. Compared to a ring-shaped magnet structure, the spacing between the magnets in an elongated magnet structure can be smaller, thereby generating a stronger magnetic field. Furthermore, the coil 3 surrounds the outer periphery of the first magnet 1 and / or the second magnet 2, and the magnetization directions of the first magnet 1 and the second magnet 2 are opposite, i.e., the magnetic poles of the ends of the first magnet 1 and the second magnet 2 that are closer to each other along the first direction are the same. Furthermore, a magnetic conductive member 4 is provided on the side of the coil 3 facing away from the magnets. Thus, when the coil 3 is energized, the magnetic field generated by the first magnet 1 and the second magnet 2 can be concentrated on the coil 3, thereby placing the entire coil 3 within the effective magnetic field area, improving magnetic field utilization and enhancing driving force. Furthermore, the rotation of the coil 3 drives the rotating bracket 30. Compared to magnets, the coil 3 is lightweight, which makes the rotation of the coil 3 and the rotating bracket 30 more sensitive, allowing for better driving of the blades 40 and adjustment of the aperture 401.

[0066] An electronic device includes a camera module.

[0067] For example, the electronic device may be a mobile phone, tablet, camera, etc. In an embodiment of the present invention, the first magnet 1 and the second magnet 2 form a long strip magnet structure. Compared to a ring magnet structure, the spacing between the magnets in the long strip magnet structure can be smaller, thereby generating a stronger magnetic field. In addition, the coil 3 surrounds the outer periphery of the first magnet 1 and / or the second magnet 2, and the magnetization directions of the first magnet 1 and the second magnet 2 are opposite, that is, the magnetic poles of the ends of the first magnet 1 and the second magnet 2 that are closer to each other along the first direction are the same. In addition, a magnetic conductive member 4 is provided on the side of the coil 3 facing away from the magnets. In this way, when the coil 3 is energized, the magnetic field generated by the first magnet 1 and the second magnet 2 can be concentrated on the coil 3, so that the entire coil 3 is within the effective magnetic field area, which can improve the magnetic field utilization and enhance the driving force. In addition, the rotation of the coil 3 drives the rotating bracket 30 to rotate. Compared to magnets, the coil 3 is lightweight, which makes the rotation of the coil 3 and the rotating bracket 30 more sensitive, allowing for better driving of the blades 40 and better adjustment of the aperture 401.

[0068] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A variable aperture iris, comprising a base, a rotating bracket rotatably connected to the base, a plurality of blades rotatably connected to the base and slidably connected to the rotating bracket, and a magnetic circuit structure for driving the rotating bracket to rotate, wherein the base is formed with a first through hole, the rotating bracket is formed with a second through hole, and the plurality of blades enclose an aperture, wherein the first through hole, the second through hole, and the aperture are aligned; characterized in that: The magnetic circuit structure includes a first magnet and a second magnet fixedly connected to the base and arranged in sequence along a first direction, a coil fixedly assembled on the rotating bracket and surrounding the outer circumference of the first magnet and / or the second magnet, and a magnetic conductive member fixed to the base and arranged on the side of the coil away from the first magnet and / or the second magnet; and the magnetization directions of the first magnet and the second magnet are opposite and both are parallel to the first direction.

2. The variable aperture according to claim 1, wherein: The magnetic circuit structure further includes at least one third magnet; The third magnet is fixed to one end of the first magnet along the magnetization direction and assembled between the first magnet and the magnetic conductive member, and the magnetization direction of the third magnet points to the first magnet; and / or, the third magnet is fixed to one end of the second magnet along the magnetization direction and assembled between the second magnet and the magnetic conductive member, and the magnetization direction of the third magnet points to the second magnet.

3. The variable aperture according to claim 2, wherein: The magnetic conductive member includes a first magnetic conductive sheet provided on a side of the coil away from the first magnet; The third magnet is fixedly mounted between the first magnet and the first magnetic conductive sheet; and / or the third magnet is fixedly mounted between the second magnet and the first magnetic conductive sheet.

4. The variable aperture according to claim 3, wherein: The magnetization direction of the third magnet is orthogonal to the magnetization direction of the first magnet, and the magnetic pole of the third magnet close to the first magnet is opposite to the magnetic pole of the first magnet close to the third magnet; and / or the magnetization direction of the third magnet is orthogonal to the magnetization direction of the second magnet, and the magnetic pole of the third magnet close to the second magnet is opposite to the magnetic pole of the second magnet close to the third magnet.

5. The variable aperture according to claim 3, wherein: The magnetic conductive member further includes a second magnetic conductive sheet connected to the first magnetic conductive sheet and arranged orthogonally to the first magnetic conductive sheet; The third magnet is fixedly mounted between the first magnet and the second magnetic conductive sheet, and / or the third magnet is fixedly mounted between the second magnet and the second magnetic conductive sheet.

6. The variable aperture according to claim 1, wherein: The magnetic circuit structure further includes an iron core fixedly connected to the base, and the first magnet and the second magnet are connected along the first direction through the iron core.

7. The variable aperture according to claim 1, wherein: The variable aperture includes a plurality of magnetic circuit structures arranged at intervals along the circumference of the base.

8. The variable aperture according to claim 1, wherein: A receiving space separated from the first through hole is formed between the base and the rotating bracket, and the magnetic circuit structure is at least partially assembled in the receiving space; and a first slide groove connected to the receiving space and extending circumferentially is provided on the outer peripheral side of the base, and the rotating bracket protrudes axially on one side of the base, and the first slide groove moves along the first slide groove; the side of the coil radially away from the first magnet and / or the second magnet is fixedly connected to the side of the first slide groove facing the receiving space.

9. A camera module, characterized in that: The invention comprises a lens module and the variable aperture according to any one of claims 1 to 8, wherein the variable aperture is fixedly connected to the lens module and is located on the light-incoming side of the lens of the lens module.

10. An electronic device, characterized in that: Including the camera module as described in claim 9.

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