Variable aperture, camera module and electronic equipment

Abstract

The invention provides a variable aperture, a camera module and electronic equipment. The variable aperture can comprise 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 driving device 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; one end of the spring is relatively fixed with the rotating bracket, and the other end of the spring is relatively fixed with the base; the spring is used for providing restoring force enabling the rotating support to rotate in the circumferential direction. When the rotating support rotates relative to the base, the spring can generate elastic deformation and can be balanced with driving force. In addition, the elastic coefficient of the spring is small in fluctuation and good in consistency in the batch production process; when long-term working or external stress such as falling occurs, the friction coefficient risk and the like are avoided, the stability is good, and the reliability is high.

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] In our daily lives, electronic devices such as mobile phones all have camera modules. The camera module dynamically adjusts the amount of light entering by changing the aperture size of the variable aperture to adapt to different lighting environments. The variable aperture usually includes a base, a rotating bracket, a driving device and a number of blades, wherein the blades enclose an aperture; the driving device drives the rotating bracket to rotate and is connected to the base, so that the rotating bracket can drive the blades to rotate and be connected to the base and slidingly connected to the rotating bracket, realizing the movement of the blades, thereby changing the aperture size of the aperture. However, if the rotating bracket is directly connected to the base, there will be a large friction between the rotating bracket and the base, so that a larger driving force is required to drive the rotating bracket, which is not conducive to the relative rotation of the rotating bracket and the base. In the related art, a ball or roller is also provided between the rotating bracket and the base. Through the action of the ball or roller, the friction between the rotating bracket and the base can be reduced, thereby reducing the driving force. However, when the variable aperture operates for a long time or falls due to external force, the function of the balls or rollers will be affected, causing the friction between the rotating bracket and the base to increase again, posing a risk of changing the friction coefficient and causing instability.

[0003] Therefore, it is necessary to provide a new variable aperture. [Summary of the invention]

[0004] The object of the present invention is to provide a variable aperture, which can ensure that the friction coefficient between the rotating bracket and the base does not change significantly, has small fluctuation, and has high reliability when the variable aperture works for a long time or falls due to external force.

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

[0006] A first aspect of the present invention provides 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 driving device 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 are combined to form an aperture hole, and the first through hole, the second through hole and the aperture hole are aligned; the variable aperture also includes a spring, one end of which is fixed relative to the rotating bracket and the other end is fixed relative to the base; the spring is used to provide a restoring force to cause the rotating bracket to rotate in a circumferential direction.

[0007] Further, the spring extends along the circumferential direction, and / or the variable aperture includes a plurality of springs arranged at intervals along the circumferential direction.

[0008] Furthermore, in some embodiments, the driving device includes a magnet structure fixedly connected to the base, and a coil sleeved on the outer circumference of the magnet structure and fixedly connected to the rotating bracket, and the coil is used to drive the rotating bracket to rotate.

[0009] Furthermore, in some embodiments, a receiving space separated from the first through hole is formed between the base and the rotating bracket, and the driving device 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 coil is fixedly connected to the side of the first sliding groove facing the receiving space along the side radially away from the magnet structure.

[0010] Furthermore, in some embodiments, a connecting protrusion protrudes from one side of the base axially toward the rotating bracket, and at least a portion of the connecting protrusion is located in the receiving space, and one end of the magnet structure is fixedly connected to the connecting protrusion.

[0011] Furthermore, in some embodiments, the spring is partially accommodated in the accommodation space, and one end of the spring is a movable end, and the movable end is fixedly connected to a side of the coil facing away from the first slider.

[0012] Furthermore, in some embodiments, the variable aperture also includes a first electrical connection plate, the first electrical connection plate includes a main body portion arranged on the side of the base axially away from the rotating bracket, and a first connection portion protruding from the main body portion toward the side of the rotating bracket, and the first connection portion is located in the first slide groove, the other end of the spring is a fixed end, and the fixed end is fixedly connected to the side of the first connection portion away from the receiving space.

[0013] Furthermore, in some embodiments, a second sliding groove extending in a circumferential direction is provided on the outer peripheral side of the rotating bracket, and a second slider moving along the second sliding groove is provided on the base; the first electrical connection plate also includes a second connecting portion protruding from the main body and parallel to and spaced apart from the first connecting portion, and the second connecting portion is fixedly connected to the side of the second slider facing away from the receiving space.

[0014] Furthermore, in some embodiments, the variable aperture also includes a second electrical connection plate fixedly connected to the side of the rotating bracket axially toward the base, the coil and the second electrical connection plate are electrically connected; the fixed end and the first connection part are electrically connected; and the movable end and the coil are electrically connected.

[0015] Furthermore, in some embodiments, the magnet structure includes a first magnet fixedly connected to the base, and a second magnet arranged at one end of the first magnet and arranged in N opposite positions, and the driving device also includes a magnetic conductive member arranged on the side of the coil away from the first magnet and fixedly connected to the base; and the magnetic conductive member at least partially extends to the end of the second magnet away from the first magnet.

[0016] Furthermore, in some embodiments, the driving device further includes at least one magnetic steel, which is fixedly assembled between the first magnet and the magnetic conductive member, and the N-pole of the magnetic steel faces the S-pole of the first magnet.

[0017] Furthermore, in some embodiments, the magnetic conductive member includes a first magnetic conductive sheet disposed on a side of the coil away from the first magnet, and the first magnetic conductive sheet extends along the length direction of the first magnet and extends to an end of the second magnet away from the first magnet.

[0018] Furthermore, in some embodiments, the driving device includes a first magnetic steel, which is fixedly assembled between the first magnet and the first magnetic conductive sheet, and the N-level of the first magnetic steel faces the S-level of the first magnet.

[0019] 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, and the second magnetic conductive sheet extends along the length direction of the first magnet and extends to the middle position of the second magnet along the length direction.

[0020] Furthermore, in some embodiments, the driving device further includes a second magnetic steel, which is fixedly assembled between the first magnet and the second magnetic conductive sheet, and the N-level of the second magnetic steel faces the S-level of the first magnet.

[0021] Furthermore, in some embodiments, the driving device further includes an iron core, the first magnet and the second magnet are connected via the iron core, and the coil extends from the north pole of the first magnet to an end of the iron core away from the first magnet.

[0022] A second aspect of the present invention provides a camera module, including 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 low beam side of the lens of the lens module.

[0023] A third aspect of the present invention provides an electronic device including a camera module.

[0024] The present invention provides a beneficial effect in that the variable aperture iris includes a base, a rotating bracket, a plurality of blades, and a drive mechanism. The drive mechanism can drive the rotating bracket to rotate, and the rotating bracket can drive the blades to rotate and slide relative to the base. This means that the drive mechanism can indirectly control the movement of the blades, thereby adjusting the size of the aperture formed by the blades and, in turn, adjusting the amount of light entering. Furthermore, the variable aperture iris includes a spring, one end of which is fixed relative to the rotating bracket and the other end is fixed relative to the base. As the rotating bracket rotates relative to the base, the spring elastically deforms accordingly, providing a restoring force for the relative rotation of the rotating bracket and the base. This reduces friction between the rotating bracket and the base, balancing the driving force of the drive mechanism. Furthermore, compared to ball or roller designs in related art, the spring in the present invention has a spring constant that fluctuates less during mass production and offers excellent consistency. Furthermore, the spring is free of frictional risks during long-term operation or when subjected to external forces, such as drops, resulting in excellent stability and reliability.

Brief Description of the Drawings

[0025] Figure 1 Schematic diagram of the three-dimensional structure of the variable aperture of the present invention;

[0026] Figure 2 An exploded view of the variable aperture of the present invention;

[0027] Figure 3 This is a schematic structural diagram of the first part of the variable aperture of the present invention;

[0028] Figure 4 Schematic diagram of the second part of the structure of the variable aperture of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the driving device of the present invention;

[0030] Figure 6 It is a cross-sectional schematic diagram of the driving device of the present invention along the AA direction.

[0031] In the accompanying drawings, each reference numeral represents:

[0032] 1. Base; 11. First through hole; 12. First slide groove; 13. Connecting protrusion; 14. Rotating shaft;

[0033] 2. Rotating bracket; 21. Second through hole; 22. First slider; 23. Second slide groove; 24. Second connecting column;

[0034] 3. Blades; 31. Aperture hole; 32. Rotation hole; 33. Sliding hole;

[0035] 4. Driving device; 41. First magnet; 42. Second magnet; 43. Coil; 44. Magnetic conductive member; 441. First magnetic conductive sheet; 442. Second magnetic conductive sheet; 45. First magnetic steel; 46. Second magnetic steel; 47. Iron core;

[0036] 5. Spring; 51. Movable end; 52. Fixed end;

[0037] 6. Accommodation space;

[0038] 7. First electrical connection plate; 71. Main body; 72. First connection portion; 73. Second connection portion;

[0039] 8. Second electrical connection board;

[0040] 9. Cover body; 91. Third through hole. [Specific implementation method]

[0041] 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.

[0042] 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.

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] See Figures 1 to 5A variable aperture iris includes a base 1, a rotating bracket 2 rotatably connected to the base 1, a plurality of blades 3 rotatably connected to the base 1 and slidably connected to the rotating bracket 2, and a driving device 4 for driving the rotating bracket 2 to rotate. The base 1 is formed with a first through hole 11, the rotating bracket 2 is formed with a second through hole 21, and the plurality of blades 3 enclose an aperture hole 31. The first through hole 11, the second through hole 21, and the aperture hole 31 are aligned. The variable aperture iris also includes a spring 5 with one end fixed relative to the rotating bracket 2 and the other end fixed relative to the base 1. The spring 5 is used to provide a restoring force to cause the rotating bracket 2 to rotate in a circumferential direction.

[0045] In an embodiment of the present invention, the variable aperture includes a base 1, a rotating bracket 2, a plurality of blades 3, and a driving device 4, wherein the driving device 4 can drive the rotating bracket 2 to rotate, and the rotating bracket 2 can drive the blades 3 to rotate relative to the base 1 and slide relative to the rotating bracket 2. That is, the movement of the plurality of blades 3 can be indirectly controlled by the driving bracket, thereby adjusting the size of the aperture hole 31 formed by the plurality of blades 3, and thus can be used to adjust the amount of light entering. In addition, the variable aperture also includes a spring 5, one end of the spring 5 is relatively fixed to the rotating bracket 2 and the other end is relatively fixed to the base 1. In this way, when the rotating bracket 2 rotates relative to the base 1, the spring 5 will undergo elastic deformation accordingly, so that the spring 5 can provide a restoring force for the relative rotation of the rotating bracket 2 and the base 1, so that the spring 5 can reduce the friction between the rotating bracket 2 and the base 1 and can balance the driving force of the driving device 4. Moreover, compared with the ball or roller design in the related art, the elastic coefficient of the spring 5 in the embodiment of the present invention fluctuates less during the mass production process and has good consistency; at the same time, there is no risk of friction coefficient when working for a long time or being subjected to external forces such as falling, and the stability is good and the reliability is high.

[0046] Furthermore, in some embodiments, the spring 5 extends circumferentially, with one end remaining relatively fixed to the base 1 and the other end remaining relatively fixed to the rotating bracket 2. In this way, the spring 5 can provide a circumferential restoring force that can balance the driving force of the driving device 4.

[0047] Furthermore, in some embodiments, the variable aperture includes a plurality of springs 5 ​​spaced apart along the circumference. Specifically, the springs 5 ​​do not need to have a predetermined extension length, but multiple springs 5 ​​can be arranged circumferentially to provide a restoring force for the relative rotation of the rotating bracket 2 and the base 1. It is understood that one end of each spring 5 is fixed relative to the base 1, and the other end of each spring 5 is fixed relative to the rotating bracket 2. Furthermore, taking the two ends of the springs 5 ​​as the left and right sides as an example, the circumferential arrangement allows the end of each spring 5 fixed relative to the base 1 to be on either the left or right side, and the end of each spring 5 fixed relative to the rotating bracket 2 to be on either the right or left side. This allows the restoring force of the springs 5 ​​to be fully utilized.

[0048] Furthermore, in some embodiments, the spring 5 may extend a certain length along the circumferential direction, and multiple springs 5 ​​may be arranged along the circumferential direction, which may enhance the restoring force of the spring 5 , which will not be elaborated here.

[0049] Furthermore, in some embodiments, the driving device 4 includes a magnet structure fixedly connected to the base 1 , and a coil 43 sleeved on the outer periphery of the magnet structure and fixedly connected to the rotating bracket 2 , and the coil 43 is used to drive the rotating bracket 2 to rotate.

[0050] Specifically, the magnet structure in the drive device 4 serves as a stator, and the coil 43 serves as a mover. When energized, the coil 43 drives the rotating bracket 2 to rotate, which in turn drives the blades 3 to rotate relative to the base 1 and slide relative to the rotating bracket 2. This indirectly controls the movement of the blades 3 through the coil 43, thereby adjusting the size of the aperture 31 formed by the blades 3 and, in turn, adjusting the amount of light entering. Furthermore, because the movement of the rotating bracket 2 is driven by the coil 43 and the coil 43 is lightweight, the movement of the coil 43 and the rotating bracket 2 is more sensitive, resulting in faster startup and shutdown of the variable aperture during power-up. Furthermore, during adjustment of the aperture 31, the blades 3 follow the movement of the coil 43 to quickly reach the desired position, achieving zero-delay adjustment. Furthermore, when adjusting the aperture 31 to reach the desired position, the blades 3 experience minimal or no vibration, achieving a precise aperture value. This reduces the time and number of closed-loop control interventions and saves power.

[0051] Furthermore, in other embodiments, the rotating bracket 2 and the magnet structure may be fixedly connected, and the coil 43 and the base 1 may be fixedly connected. Similarly, when the coil 43 is energized, the rotating bracket 2 may be driven to rotate relative to the base 1.

[0052] It is understandable that the driving device 4 can also be other driving sources. For example, it can be a motor, and the output shaft of the other motor is connected to the rotating bracket 2 to drive the rotating bracket 2 to rotate.

[0053] Furthermore, in some embodiments, a receiving space 6 is formed between the base 1 and the rotating bracket 2, which is separated from the first through hole 11, and the driving device 4 is at least partially assembled in the receiving space 6; and, a first slide groove 12 is provided on the outer peripheral side of the base 1, which is connected to the receiving space 6 and extends circumferentially, and the rotating bracket 2 protrudes axially on the side toward the base 1. The first slide groove 12 moves along the first slide groove 12; the coil 43 is fixedly connected to the side of the first slide groove 22 toward the receiving space 6 along the side radially away from the magnet structure.

[0054] Specifically, the base 1 may include an axially arranged base body, a central portion protruding axially from the base body, and a first sidewall arranged around the base body. The first slide groove 12 may be provided on the sidewall, the first through hole 11 may be provided in the central portion, the first sidewall may specifically include two spaced apart protrusions, and the first slide groove 12 is formed by the two protrusions. In addition, the rotating bracket 2 may include an axially arranged base body and a second sidewall arranged around the base body, the first slider 22 being formed on the second sidewall. The receiving space 6 may be formed between the outer side of the central portion, the inner side of the first sidewall of the base 1, and the inner side of the second sidewall of the rotating bracket 2. The coil 43 and the magnet structure of the driving device 4 may be provided within the receiving space 6, and the coil 43 may be fixedly connected to the inner side of the first slider 22 of the rotating bracket 2, thereby achieving a fixed connection between the coil 43 and the rotating bracket 2. In addition, after the coil 43 is energized, the center of the first through hole 11, the second through hole 21, and the aperture hole 31 is used as the rotation axis 14, and the coil 43 can drive the rotating bracket 2 to rotate. At this time, the first slider 22 moves in the first slide groove 12, and the rotating bracket 2 can be rotated relative to the base 1.

[0055] It should be noted that, in the embodiment of the present invention, the axial direction refers to a direction parallel to the central axis of the aperture hole 31 .

[0056] Furthermore, in some embodiments, a connecting protrusion 13 protrudes axially from one side of the base 1 toward the rotating bracket 2 , and at least a portion of the connecting protrusion 13 is located in the receiving space 6 , and one end of the magnet structure is fixedly connected to the connecting protrusion 13 .

[0057] Specifically, one of the protruding structures in the base 1 used to form the first chute 12 can be a connecting protrusion 13, and one end of the magnet structure can be fixedly connected to the connecting protrusion 13. Exemplarily, an adhesive bonding method can be used to achieve a fixed connection between the magnet structure and the base 1. It is understandable that the two protruding structures in the base 1 used to form the first chute 12 can both serve as the connecting protrusion 13, and the two ends of the magnet structure can be fixedly connected to the two connecting protrusions 13 respectively.

[0058] In addition, in some specific embodiments, the magnet structure has a chamfered structure, and the connecting protrusion 13 of the base 1 can be provided with a corresponding chamfered groove, so that the magnet structure can fit more closely to the connecting protrusion 13, thereby improving the connection stability between the magnet structure and the base 1.

[0059] Furthermore, in some embodiments, the spring 5 is partially accommodated in the accommodating space 6 , and one end of the spring 5 is a movable end 51 , which is fixedly connected to a side of the coil 43 away from the first slider 22 .

[0060] Specifically, the movable end 51 of the spring 5 can be fixedly connected to the side of the coil 43 facing away from the first slider 22. Since the coil 43 is fixedly connected to the rotating bracket 2, the movable end 51 of the spring 5 can be fixedly connected to the rotating bracket 2 through the coil 43, thereby achieving relative fixation between the movable end 51 of the spring 5 and the rotating bracket 2. In this way, while the coil 43 drives the rotating bracket 2 to rotate, it can also drive the spring 5 to undergo elastic deformation, so that the spring 5 can provide a restoring force for the relative rotation of the rotating bracket 2 and the base 1, thereby reducing the friction between the rotating bracket 2 and the base 1, and the elastic force of the spring 5 can be balanced with the driving force of the driving device 4.

[0061] Furthermore, in some embodiments, the variable aperture also includes a first electrical connection plate 7, which includes a main body 71 arranged on the side of the base 1 axially away from the rotating bracket 2, and a first connection portion 72 protruding from the main body 71 toward the side of the rotating bracket 2, and the first connection portion 72 is located in the first slide groove 12, and the other end of the spring 5 is the fixed end 52, which is fixedly connected to the side of the first connection portion 72 away from the receiving space 6.

[0062] Specifically, the variable aperture further includes a first electrical connection plate 7 for providing electrical energy, wherein the first electrical connection plate 7 includes a main body 71 connected to the base body of the base 1, and a first connection portion 72 protruding axially. The first connection portion 72 is disposed at the position of the first slide groove 12. In addition, the fixed end 52 of the spring 5 is fixedly connected to the first connection portion 72 of the first electrical connection plate 7, thereby achieving a fixed connection between one end of the spring 5 and the first electrical connection plate 7. In addition, the first electrical connection plate 7 is fixedly connected to the base 1, thereby achieving a fixed connection between the fixed end 52 of the spring 5 and the base 1 through the first connection portion 72 of the first electrical connection plate 7.

[0063] Furthermore, in some embodiments, a second sliding groove 23 extending in the circumferential direction is provided on the outer peripheral side of the rotating bracket 2, and a second slider moving along the second sliding groove 23 is provided on the base 1; the first electrical connection plate 7 also includes a second connecting portion 73 protruding from the main body 71 and parallel to and spaced apart from the first connecting portion 72, and the second connecting portion 73 is fixedly connected to the side of the second slider facing away from the receiving space 6.

[0064] Specifically, the first slider 22 can be disposed on the first side wall of the base 1, such that the second slider and the first chute 12 are spaced apart on the base 1; the second chute 23 can be disposed on the second side wall of the rotating bracket 2, such that the second chute 23 and the first slider 22 are spaced apart on the rotating bracket 2. When the coil 43 is energized, the coil 43 drives the rotating bracket 2 to rotate, the first slider 22 moves in the first chute 12, and the second slider moves in the second chute 23, thereby enabling the rotating bracket 2 to rotate relative to the base 1. In addition, the first electrical connection plate 7 can also be provided with a second connecting portion 73, which is fixed to the outside of the second slider so that the second connecting portion 73 is exposed to the outside, thereby enabling connection to external equipment.

[0065] It is understandable that in some embodiments, only the second sliding groove 23 and the second sliding block may be provided, and the rotation of the rotating bracket 2 relative to the base 1 can also be achieved.

[0066] Furthermore, in some embodiments, the variable aperture also includes a second electrical connection plate 8 fixedly connected to the side of the rotating bracket 2 axially toward the base 1, the coil 43 and the second electrical connection plate 8 are electrically connected; the fixed end 52 and the first connection part 72 are electrically connected; and the movable end 51 and the coil 43 are electrically connected.

[0067] Specifically, one of the first electrical connection plate 7 and the second electrical connection plate 8 can serve as the positive electrode and the other can serve as the negative electrode, the coil 43 and the second electrical connection plate 8 are electrically connected, and the first connection portion 72 of the first electrical connection plate 7 can be electrically connected to the fixed end 52 of the spring 5, and the movable end 51 of the spring 5 can be electrically connected to the coil 43. In this way, the first electrical connection plate 7, the coil 43, and the second electrical connection plate 8 can be electrically connected via the spring 5, thereby energizing the coil 43. In other words, the spring 5 not only provides a restoring force to balance the driving force of the driving device 4, but also serves as a medium for electrically connecting the coil 43 to the first electrical connection plate 7 and the second electrical connection plate 8, thereby allowing for the space between the base 1 and the rotating bracket 2 to be planned, saving space and reducing volume.

[0068] In addition, the fixed end 52 of the spring 5 is arranged on the outside of the first connecting portion 72 of the first electrical connecting plate 7, and the second connecting portion 73 of the first electrical connecting plate 7 is arranged on the outside of the second slider of the base 1. In this way, the first connecting portion 72 and the second connecting portion 73 of the first electrical connecting plate 7 can be used to connect to the external circuit, thereby realizing the overall circuit path.

[0069] It can be understood that since the second electrical connection plate 8 and the rotating bracket 2 are fixedly connected, after power is turned on, the second electrical connection plate 8 will also rotate under the drive of the rotating bracket 2, but since the second electrical connection plate 8, the coil 43 and the first electrical connection plate 7 are electrically connected through the coil 43, even if the second electrical connection plate 8 rotates, it will not affect the connectivity of the entire circuit.

[0070] Furthermore, in some embodiments, the magnet structure includes a first magnet 41 fixedly connected to the base 1, and a second magnet 42 arranged at one end of the first magnet 41 and arranged in N opposite positions. The driving device 4 also includes a magnetic conductive member 44 arranged on the side of the coil 43 away from the first magnet 41 and fixedly connected to the base 1; and the magnetic conductive member 44 at least partially extends to the end of the second magnet 42 away from the first magnet 41.

[0071] Specifically, the second magnet 42 is disposed at one end of the first magnet 41, so that the first magnet 41 and the second magnet 42 form a long strip magnet structure. Compared to the ring magnet structure, the spacing between the magnets of the long strip magnet structure can be smaller, thereby generating a greater magnetic field strength. In addition, the coil 43 surrounds the outer periphery of the N-pole of the first magnet 41. At the same time, the N-pole of the first magnet 41 and the N-pole of the second magnet 42 are arranged relative to each other. In addition, a magnetic conductive member 44 is provided on the side of the coil 43 away from the first magnet 41. The magnetic conductive member 44 at least partially extends to the end of the second magnet 42 away from the first magnet 41. Such an arrangement allows the entire coil 43 to be in the effective magnetic field area after the coil 43 is energized, so that the magnetic field generated by the first magnet 41 and the second magnet 42 can be concentrated on the coil 43, thereby improving the magnetic field utilization rate and enhancing the driving force.

[0072] It can be understood that the first magnet 41 and the second magnet 42 are connected to form a long strip magnet structure. After the coil 43 is energized, the coil 43 and the long strip magnet structure will move relative to each other, so that the coil 43 can move to other positions such as the N pole of the second magnet 42. That is, the connection position of the coil 43 and the long strip magnet structure will change dynamically after the coil 43 is energized. The embodiment of the present invention mainly describes the connection position of the coil 43 and the long strip magnet structure when the coil 43 is not energized.

[0073] Furthermore, in some embodiments, the driving device 4 further includes at least one magnet fixedly mounted between the first magnet 41 and the magnetic conductive member 44 , with the N pole of the magnet facing the S pole of the first magnet 41 .

[0074] Specifically, the magnetic conductive member 44 is arranged on the outer peripheral side of the coil 43 away from the first magnet 41, and there is an assembly gap between the magnetic conductive member 44 and the first magnet 41. One or more magnetic steels are arranged in the assembly gap between the first magnet 41 and the magnetic conductive member 44, and the N-level of the magnetic steel is directed toward the S-level of the first magnet 41. In this way, the magnetic lines of force generated by the magnetic steel and the magnetic lines of force generated by the first magnet 41 can be superimposed, thereby enhancing the magnetic field strength and further enhancing the driving force.

[0075] It can be understood that the embodiment of the present invention does not limit the orientation of the two poles of the magnetic steel and the orientation of the two poles of the first magnet 41. The orientation of the two poles of the magnetic steel and the orientation of the two poles of the first magnet 41 can be changed by changing the arrangement of the magnetic steel between the first magnet 41 and the magnetic conductive member 44, thereby adjusting the degree of superposition of the magnetic lines of force generated by the magnetic steel and the magnetic lines of force generated by the first magnet 41.

[0076] For example, in some specific embodiments, the two sides of the magnetic steel are respectively fixedly attached to the outer surface of the first magnet 41 and the inner surface of the magnetic conductive part 44, so that the directions of the two poles of the magnetic steel are orthogonal to the directions of the two poles of the first magnet 41, that is, the N pole of the magnetic steel points to the outer surface of the S pole of the first magnet 41, and the S pole of the magnetic steel points to the inner surface of the magnetic conductive part 44. In this way, the magnetic lines of force generated by the magnetic steel and the magnetic lines of force generated by the first magnet 41 can also be superimposed, and the superposition effect can be better, thereby better enhancing the magnetic field strength and generating a stronger driving force.

[0077] Furthermore, in some embodiments, the magnetic conductive member 44 includes a first magnetic conductive sheet 441 disposed on the side of the coil 43 away from the first magnet 41 . The first magnetic conductive sheet 441 extends along the length direction of the first magnet 41 and extends to the end of the second magnet 42 away from the first magnet 41 .

[0078] Specifically, the first magnetic conductive sheet 441 is arranged on the side of the coil 43 away from the first magnet 41. The first magnetic conductive sheet 441 is in the shape of a long strip, and the first magnetic conductive sheet 441 extends from one end of the first magnet 41 to the connection point of the ends of the first magnet 41 and the second magnet 42, and then continues to extend to the other end of the second magnet 42; so that the outer sides of the first magnet 41 and the second magnet 42 are both provided with magnetic conductive structures, so that the magnetic field generated by the first magnet 41 and the magnetic field generated by the second magnet 42 can be concentrated by the first magnetic conductive sheet 441, so that the magnetic fields generated by the first magnet 41 and the second magnet 42 are both concentrated on the coil 43, which can improve the utilization rate of the magnetic field and enhance the driving force.

[0079] In other embodiments, the first magnetic conductive sheet 441 can extend from one end of the first magnet 41 to the connection point between the ends of the first magnet 41 and the second magnet 42, and then continue to extend to the middle position of the second magnet 42 along the length direction, which can also concentrate the magnetic field generated by the first magnet 41 and the magnetic field generated by the second magnet 42.

[0080] Furthermore, in some specific embodiments, the first magnetic conductive sheet 441 can be fixed to the base body of the base 1 by bonding, thereby achieving a fixed connection between the magnetic conductive member 44 and the base 1 .

[0081] Furthermore, in some embodiments, the driving device 4 includes a first magnetic steel 45 , which is fixedly assembled between the first magnet 41 and the first magnetic conductive sheet 441 , and the N pole of the first magnetic steel 45 faces the S pole of the first magnet 41 .

[0082] Specifically, there is an assembly gap between the first magnetic conductive sheet 441 and the first magnet 41, and the first magnetic steel 45 is arranged in the assembly gap between the first magnetic conductive sheet 441 and the first magnet 41, and the N pole of the first magnetic steel 45 is directed toward the S pole of the first magnet 41. In this way, the magnetic lines of force of the first magnetic steel 45 and the magnetic lines of force of the first magnet 41 can overlap, thereby enhancing the magnetic field strength.

[0083] It can be understood that the embodiment of the present invention does not limit the orientation of the two poles of the first magnetic steel 45 and the orientation of the two poles of the first magnet 41. The orientation of the two poles of the first magnetic steel 45 and the orientation of the two poles of the first magnet 41 can be changed by changing the arrangement of the first magnetic steel 45 between the first magnet 41 and the first magnetic conductive sheet 441, thereby adjusting the degree of superposition of the magnetic lines of force generated by the first magnetic steel 45 and the magnetic lines of force generated by the first magnet 41.

[0084] For example, in some specific embodiments, the two sides of the first magnetic steel 45 are fixedly attached to the outer surface of the first magnet 41 and the inner surface of the first magnetic conductive sheet 441, respectively, so that the directions of the two poles of the first magnetic steel 45 are orthogonal to the directions of the two poles of the first magnet 41, that is, the N pole of the first magnetic steel 45 points to the outer surface of the S pole of the first magnet 41, and the S pole of the first magnetic steel 45 points to the inner surface of the first magnetic conductive sheet 441. In this way, the magnetic lines of force generated by the first magnetic steel 45 and the magnetic lines of force generated by the first magnet 41 can also be superimposed, and the superposition effect can be better, thereby better enhancing the magnetic field strength and generating a stronger driving force.

[0085] Furthermore, in some embodiments, the magnetic conductive member 44 also includes a second magnetic conductive sheet 442 connected to the first magnetic conductive sheet 441 and arranged orthogonally to the first magnetic conductive sheet 441. The second magnetic conductive sheet 442 extends along the length direction of the first magnet 41 and extends to the middle position of the second magnet 42 along the length direction.

[0086] Specifically, the magnetic conductive member 44 also includes a second magnetic conductive sheet 442 arranged orthogonally to the first magnetic conductive sheet 441. The second magnetic conductive sheet 442 also extends along the length direction of the first magnet 41, wherein the second magnetic conductive sheet 442 extends from one end of the first magnet 41 to the connection point between the ends of the first magnet 41 and the second magnet 42, and then continues to extend to the middle position of the second magnet 42 along the length direction. It can also make the magnetic lines of force generated by the first magnet 41 concentrated on the coil 43, and can also guide the magnetic lines of force generated by the second magnet 42 to concentrate on the position of the coil 43.

[0087] In other embodiments, the second magnetic conductive sheet 442 extends along the length direction of the first magnet 41 and extends to the end of the second magnet 42 away from the first magnet 41, that is, the second magnetic conductive sheet 442 extends from one end of the first magnet 41 to the connection point between the ends of the first magnet 41 and the second magnet 42, and then continues to extend to the other end of the second magnet 42; in this way, the magnetic lines of force generated by the first magnet 41 can be guided to concentrate, and the magnetic lines of force generated by the second magnet 42 can also be guided to better concentrate.

[0088] Furthermore, in some specific embodiments, the second magnetic conductive sheet 442 of the magnetic conductive member 44 can be located in the first slide groove 12 of the base 1, and when the base 1 and the rotating bracket 2 are connected, the second magnetic conductive sheet 442 is located on one side of the first slider 22 of the rotating bracket 2 in the axial direction, that is, one of the second magnetic conductive sheet 442 and the first slider 22 is located axially above the other. The second magnetic conductive sheet 442 of the magnetic conductive member 44 can be fixedly connected to the first connecting portion 72 of the first electrical connection plate 7, and the fixed end 52 of the spring 5 can be fixedly connected to the side of the first connecting portion 72 facing away from the magnetic conductive member 44. In this way, the connection stability between the second magnetic conductive sheet 442 of the magnetic conductive member 44, the first connecting portion 72 of the first electrical connection plate 7, the fixed end 52 of the spring 5, and the base 1 can be further improved.

[0089] Furthermore, in some embodiments, the driving device 4 further includes a second magnetic steel 46 , which is fixedly assembled between the first magnet 41 and the second magnetic conductive sheet 442 , and the N pole of the second magnetic steel 46 faces the S pole of the first magnet 41 .

[0090] Specifically, there is an assembly gap between the second magnetic conductive sheet 442 and the first magnet 41, and a second magnetic steel 46 is arranged in the assembly gap between the second magnetic conductive sheet 442 and the first magnet 41, and the N-pole of the second magnetic steel 46 is directed toward the S-pole of the first magnet 41. In this way, the magnetic lines of force of the second magnetic steel 46 and the magnetic lines of force of the first magnet 41 can overlap, thereby enhancing the magnetic field strength.

[0091] It can be understood that the embodiment of the present invention does not limit the orientation of the two poles of the second magnetic steel 46 and the orientation of the two poles of the first magnet 41. By changing the arrangement of the second magnetic steel 46 between the first magnet 41 and the second magnetic conductive sheet 442, the orientation of the two poles of the second magnetic steel 46 and the orientation of the two poles of the first magnet 41 can be changed, thereby adjusting the degree of superposition of the magnetic lines of force generated by the second magnetic steel 46 and the magnetic lines of force generated by the first magnet 41.

[0092] For example, in some specific embodiments, the two sides of the second magnetic steel 46 are respectively fixedly attached to the outer surface of the first magnet 41 and the inner surface of the second magnetic conductive sheet 442, so that the directions of the two poles of the second magnetic steel 46 are orthogonal to the directions of the two poles of the first magnet 41, that is, the N pole of the second magnetic steel 46 points to the outer surface of the S pole of the first magnet 41, and the S pole of the second magnetic steel 46 points to the inner surface of the second magnetic conductive sheet 442. In this way, the magnetic lines of force generated by the second magnetic steel 46 and the magnetic lines of force generated by the first magnet 41 can also be superimposed, and the superposition effect can be better, thereby better enhancing the magnetic field strength and generating a stronger driving force.

[0093] Furthermore, in some embodiments, the driving device 4 also includes an iron core 47 , the first magnet 41 and the second magnet 42 are connected by the iron core 47 , and the coil 43 extends from the north pole of the first magnet 41 to an end of the iron core 47 away from the first magnet 41 .

[0094] Specifically, an iron core 47 may be provided between the first magnet 41 and the second magnet 42. The N-pole of the first magnet 41 and the iron core 47 are both inserted into the coil 43, i.e., the coil 43 surrounds the outer periphery of the N-pole of the first magnet 41 and the outer periphery of the iron core 47. Since the iron core 47 is made of paramagnetic material with a high magnetic permeability, when the iron core 47 is inserted into the energized coil 43, the iron core 47 is magnetized by the magnetic field of the energized coil 43, which greatly increases the magnetic induction intensity within the iron core 47. The magnetized iron core 47 also becomes a magnet. In this way, the magnetic field generated by the iron core 47 can be superimposed on the magnetic fields generated by the first magnet 41 and the second magnet 42, thereby further enhancing the magnetic field strength and the driving force.

[0095] Furthermore, in some embodiments, the variable aperture includes a plurality of drive devices 4 spaced circumferentially around the base 1. By providing multiple drive devices 4, the coils 43 of multiple drive devices 4 can simultaneously control a single rotating bracket 2, thereby improving the driving effect of the rotating bracket 2. Furthermore, since the multiple drive devices 4 are spaced apart, the driving force applied to each portion of the rotating bracket 2 along the circumference is more evenly distributed, thereby enabling better rotation.

[0096] Furthermore, in some specific embodiments, the blade 3 is provided with a rotation hole 32 and a sliding hole 33 spaced apart from the rotation hole 32; a rotation shaft 14 protrudes axially from the center portion of the base 1, and a connecting post protrudes axially from the frame of the rotating bracket 2; the rotation hole 32 of the blade 3 is sleeved on the rotation shaft 14, while the sliding hole 33 of the blade 3 is sleeved on the connecting post. First, when the coil 43 is energized, the connecting post of the rotating bracket 2 and the rotation hole 32 of the blade 3 act to allow the rotating bracket 2 to drive the blade 3 to rotate, while simultaneously, the rotation hole 32 of the blade 3 also rotates around the rotation shaft 14 of the base 1. In this way, the blade 3 rotates around the rotation shaft 14 of the base 1 while sliding relative to the rotating bracket 2 along the extension direction of the sliding hole 33, thereby enabling the size of the aperture 31 to be adjusted.

[0097] Furthermore, in some embodiments, the adjustable aperture also includes a cover body 9 that is fixed relative to the side wall of the base 1 and covers the side of the blade 3 away from the rotating bracket 2. The cover body 9 is provided with a third through hole 91 aligned with the first through hole 11. In this way, the blade 3 can be protected and the service life of the adjustable aperture can be improved.

[0098] 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.

[0099] 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 31 of the variable aperture can be adjusted to adjust the amount of light entering the lens, thereby achieving better photographic effects in different environments.

[0100] In addition, in the embodiment of the present invention, one end of the spring 5 of the variable aperture is relatively fixed to the rotating bracket 2 and the other end is relatively fixed to the base 1. In this way, when the rotating bracket 2 rotates relative to the base 1, the spring 5 will undergo elastic deformation accordingly, so that the spring 5 can provide a restoring force for the relative rotation of the rotating bracket 2 and the base 1, so that the spring 5 can reduce the friction between the rotating bracket 2 and the base 1 and balance the driving force of the driving device 4. Moreover, compared with the ball or roller design in the related art, the elastic coefficient of the spring 5 of the embodiment of the present invention fluctuates less during the mass production process and has good consistency; at the same time, there is no risk of friction coefficient in long-term operation or external force such as falling, and the stability is good and the reliability is high. In this way, it is beneficial to adjust the amount of light entering the lens and improve the reliability of the camera module.

[0101] Furthermore, in some specific embodiments, the surfaces of the blades 3 are smoothed, thereby reducing friction and preventing the risk of the blades 3 generating fine debris due to long-term friction and contaminating the lens.

[0102] An electronic device includes a camera module.

[0103] Exemplarily, the electronic device may be a mobile phone, a tablet, a camera, etc. In an embodiment of the present invention, one end of the spring 5 of the variable aperture is relatively fixed to the rotating bracket 2 and the other end is relatively fixed to the base 1. In this way, when the rotating bracket 2 rotates relative to the base 1, the spring 5 will undergo elastic deformation accordingly, so that the spring 5 can provide a restoring force for the relative rotation of the rotating bracket 2 and the base 1, so that the spring 5 can reduce the friction between the rotating bracket 2 and the base 1 and balance the driving force of the driving device 4. Moreover, compared with the ball or roller design in the related art, the elastic coefficient of the spring 5 in the embodiment of the present invention fluctuates less during the mass production process and has good consistency; at the same time, there is no risk of friction coefficient in long-term operation or external force such as falling, and the stability is good and the reliability is high. In this way, it is beneficial to adjust the amount of light entering the lens of the electronic device and improve the reliability of the electronic device.

[0104] 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, 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 driving device 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 variable aperture further includes a spring with one end fixed relative to the rotating bracket and the other end fixed relative to the base; the spring is used to provide a restoring force to cause the rotating bracket to rotate in a circumferential direction.

2. The variable aperture according to claim 1, wherein: The spring extends in the circumferential direction, and / or the variable aperture includes a plurality of springs arranged at intervals in the circumferential direction.

3. The variable aperture according to claim 1, wherein: The driving device includes a magnet structure fixedly connected to the base, and a coil sleeved on the outer circumference of the magnet structure and fixedly connected to the rotating bracket, and the coil is used to drive the rotating bracket to rotate.

4. The variable aperture according to claim 3, wherein: A receiving space separated from the first through hole is formed between the base and the rotating bracket, and the driving device 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 coil is fixedly connected to the side of the first sliding groove facing the receiving space along the side radially away from the magnet structure.

5. The variable aperture according to claim 4, characterized in that: A connecting protrusion is protruded from one side of the base axially toward the rotating bracket, and at least a portion of the connecting protrusion is located in the receiving space. One end of the magnet structure is fixedly connected to the connecting protrusion.

6. The variable aperture according to claim 4, wherein: The spring portion is accommodated in the accommodation space, and one end of the spring is a movable end, which is fixedly connected to a side of the coil away from the first slider.

7. The variable aperture according to claim 6, characterized in that: The variable aperture further includes a first electrical connection plate, which includes a main body portion arranged on the side of the base axially away from the rotating bracket, and a first connection portion protruding from the main body portion toward the side of the rotating bracket, and the first connection portion is located in the first slide groove, and the other end of the spring is a fixed end, which is fixedly connected to the side of the first connection portion away from the accommodating space.

8. The variable aperture according to claim 7, characterized in that: A second sliding groove extending in the circumferential direction is provided on the outer peripheral side of the rotating bracket, and a second sliding block moving along the second sliding groove is provided on the base; the first electrical connection plate also includes a second connecting portion protruding from the main body and parallel to and spaced apart from the first connecting portion, and the second connecting portion is fixedly connected to the side of the second sliding block facing away from the receiving space.

9. The variable aperture according to claim 7, wherein: The variable aperture also includes a second electrical connection plate fixedly connected to the side of the rotating bracket axially facing the base, the coil and the second electrical connection plate are electrically connected; the fixed end and the first connection part are electrically connected; the movable end and the coil are electrically connected.

10. The variable aperture according to claim 3, wherein: The magnet structure includes a first magnet fixedly connected to the base, and a second magnet arranged at one end of the first magnet and arranged in N opposite positions. The driving device also includes a magnetic conductive part arranged on the side of the coil away from the first magnet and fixedly connected to the base; and the magnetic conductive part at least partially extends to the end of the second magnet away from the first magnet.

11. The variable aperture according to claim 10, wherein: The driving device further includes at least one magnetic steel, which is fixedly assembled between the first magnet and the magnetic conductive member, and the N pole of the magnetic steel faces the S pole of the first magnet.

12. The variable aperture according to claim 10, wherein: The magnetic conductive member includes a first magnetic conductive sheet disposed on a side of the coil away from the first magnet. The first magnetic conductive sheet extends along a length direction of the first magnet and extends to an end of the second magnet away from the first magnet.

13. The variable aperture according to claim 12, wherein: The driving device includes a first magnetic steel, which is fixedly assembled between the first magnet and the first magnetic conductive sheet, and the N pole of the first magnetic steel faces the S pole of the first magnet.

14. The variable aperture according to claim 12, 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 second magnetic conductive sheet extends along the length direction of the first magnet and extends to the middle position of the second magnet along the length direction.

15. The variable aperture according to claim 14, characterized in that: The driving device further includes a second magnetic steel, which is fixedly assembled between the first magnet and the second magnetic conductive sheet, and the N pole of the second magnetic steel faces the S pole of the first magnet.

16. The variable aperture according to claim 10, wherein: The driving device further includes an iron core, the first magnet and the second magnet are connected by the iron core, and the coil extends from the north pole of the first magnet to an end of the iron core away from the first magnet.

17. A camera module, characterized in that: The invention comprises a lens module and a variable aperture as claimed in any one of claims 1 to 16, wherein 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.

18. An electronic device, characterized in that: Including the camera module as described in claim 17.

Images