Variable aperture, camera module and electronic equipment

Abstract

The invention provides a variable aperture, a camera module and electronic equipment, and relates to the technical field of electronics. The variable aperture comprises a roller, a rotating support, a plurality of blades and a base, the base is annular, the rotating support is sleeved with the base, the roller is located between the base and the rotating support and is in rolling connection with the base and the rotating support, the blades are annularly distributed on one side of the base and define an aperture hole, and the blades are rotationally connected with the base. And the bracket is slidably connected with the rotating bracket. The multiple blades can form an aperture hole with the adjustable aperture, the pin rollers are arranged between the base and the rotating support and can roll when the rotating support rotates relative to the base, friction force between the base and the rotating support is reduced, and when the variable aperture is impacted, the pin rollers, the base and the rotating support are not prone to deformation. And the stability of relative rotation of the base and the rotating bracket is improved.

Description

Technical Field

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

[0002] In order to improve the camera performance of mobile phones, a variable aperture is set in the camera module of the mobile phone to adjust the amount of light entering the lens. In the related art, the variable aperture includes multiple blades, a rotating component and a fixed component. The rotating component can rotate relative to the fixed component and drive the multiple blades to open and close to adjust the size of the aperture. The rotating component and the fixed component are connected by a ball bearing. When the mobile phone is hit, the ball bearing can easily cause the rotating component and the fixed component to deform, affecting the adjustment of the aperture. Summary of the invention

[0003] In view of this, the present disclosure provides a variable aperture, a camera module and an electronic device, which can improve the structural stability of the variable aperture.

[0004] Specifically, the following technical solutions are included:

[0005] On the one hand, an embodiment of the present disclosure provides a variable aperture, including a roller, a rotating bracket, a plurality of blades and a base;

[0006] The base is annular and is sleeved outside the rotating bracket. The roller is located between the base and the rotating bracket and is rollingly connected with the base and the rotating bracket.

[0007] The plurality of blades are distributed in a ring shape on one side of the base and surround an aperture hole. The plurality of blades are rotatably connected to the base and slidably connected to the rotating bracket.

[0008] Optionally, an inner peripheral side surface of the base is provided with a receiving groove, the roller is located in the receiving groove, and the cylindrical surface of the roller is respectively against the bottom wall of the receiving groove and the outer peripheral side surface of the rotating bracket.

[0009] Optionally, the variable aperture further includes a stator and a rotor, the stator is connected to the inner peripheral side surface of the base, the rotor is connected to the outer peripheral side surface of the rotating bracket, and the stator is opposite to the rotor.

[0010] Optionally, there are two rollers and two receiving grooves, two rollers are respectively located in the two receiving grooves, and the stator is located between the two rollers.

[0011] Optionally, the rotating bracket is provided with a mounting groove, and the rotor is located in the mounting groove.

[0012] Optionally, the base is provided with a through hole, and the stator is located in the through hole.

[0013] Optionally, the stator is a first coil and the rotor is a first magnet.

[0014] Optionally, the variable aperture further includes a flexible circuit board, which is annular and sleeved outside the base, and the flexible circuit board is electrically connected to the first coil.

[0015] Optionally, the blade is provided with a rotating hole and a sliding groove, a rotating shaft is provided on the end surface of the base, the rotating shaft is rotatably matched with the rotating hole, and a sliding column is provided on the end surface of the rotating bracket, and the sliding column is slidably matched with the sliding groove.

[0016] Optionally, the variable aperture further includes a gasket, the gasket is located between the blades and the rotating bracket, the gasket has a light-transmitting hole, and the light-transmitting hole is arranged cocentrically with the aperture hole.

[0017] Optionally, the blade has a thickness of 40 μm-120 μm.

[0018] Optionally, the blade has a thickness of 55 μm.

[0019] Optionally, the blades include a first edge and a second edge, one end of the first edge is connected to one end of the second edge, the first edge is a straight line, the second edge is a curved line, the aperture hole is surrounded by the first edge of each of the blades, or the aperture hole is surrounded by the first edge and the second edge of each of the blades.

[0020] On the other hand, an embodiment of the present disclosure provides a camera module, comprising the variable aperture, a lens assembly, a first actuator, and a second actuator;

[0021] The variable aperture is connected to the lens assembly and is located at the light-incoming side of the lens assembly. The first actuator is connected to a side of the lens assembly away from the variable aperture. The second actuator is connected to a side of the first actuator away from the lens assembly.

[0022] Optionally, the first actuator includes a base and a lens frame, the lens frame is connected to the lens assembly, the base has a accommodating cavity, the lens frame is located in the accommodating cavity and is movably connected to the base.

[0023] Optionally, the first actuator further includes a first spring plate and a second spring plate, the lens frame is located between the first spring plate and the second spring plate, the first spring plate is respectively connected to the lens frame and the base, and the second spring plate is respectively connected to the lens frame and the base.

[0024] Optionally, the first actuator further includes a second magnet and a second coil, the second magnet is connected to the base, the second coil is connected to the lens holder, and the second magnet is opposite to the second coil.

[0025] Optionally, the second actuator comprises a support member and a bearing member, one side of the support member is connected to the first actuator, and a side of the support member away from the first actuator is movably connected to the bearing member.

[0026] Optionally, the second actuator includes at least four SMA wires, the support member has four sides, the SMA wires are respectively located on the four sides of the support member, one end of each of the SMA wires is connected to a corner of the support member, and the other end of each of the SMA wires is connected to the supporting member.

[0027] Optionally, the second actuator further comprises a plurality of balls, a plurality of grooves are provided on a surface of the bearing member close to the support member, the balls are located in the grooves, and the balls abut against the support member.

[0028] On the other hand, an embodiment of the present disclosure provides an electronic device, including the above-mentioned camera module.

[0029] The beneficial effects of the technical solution provided by the embodiments of the present disclosure include at least:

[0030] In the variable aperture provided by the embodiment of the present disclosure, a plurality of blades are arranged on one side of the base, are rotatably connected to the base, and are slidably connected to the rotating bracket to form an aperture hole with adjustable aperture. A roller is arranged between the base and the rotating bracket, and the roller can roll when the rotating bracket rotates relative to the base, thereby reducing the friction between the base and the rotating bracket. Since the roller has a larger contact area with the base and the rotating bracket, the roller, the base and the rotating bracket are not easily deformed when impacted, thereby improving the stability of the relative rotation of the base and the rotating bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of a variable aperture provided in an embodiment of the present disclosure;

[0033] Figure 2 An exploded view of a variable aperture provided by an embodiment of the present disclosure;

[0034] Figure 3A schematic diagram of a base of a variable aperture provided in an embodiment of the present disclosure;

[0035] Figure 4 A schematic diagram of a base of a variable aperture provided in an embodiment of the present disclosure;

[0036] Figure 5 A schematic diagram of a rotating bracket of a variable aperture provided in an embodiment of the present disclosure;

[0037] Figure 6 A schematic diagram of a rotating bracket of a variable aperture provided in an embodiment of the present disclosure;

[0038] Figure 7 A schematic diagram of a variable aperture provided in an embodiment of the present disclosure;

[0039] Figure 8 A schematic diagram of blades and spacers of a variable aperture is provided for an embodiment of the present disclosure;

[0040] Fig. 9 A schematic diagram of blades of a variable aperture provided in an embodiment of the present disclosure;

[0041] Fig.10 A schematic diagram of a flexible circuit board and a stator of a variable aperture provided in an embodiment of the present disclosure;

[0042] Fig.11 An exploded diagram of a camera module provided in an embodiment of the present disclosure;

[0043] Fig.12 An exploded view of a first actuator of a camera module provided in an embodiment of the present disclosure;

[0044] Fig.13 An exploded view of a second actuator of a camera module provided in an embodiment of the present disclosure;

[0045] Fig.14 A schematic diagram of a support member of a second actuator provided in an embodiment of the present disclosure;

[0046] Fig.15 A schematic diagram of a supporting member of a second actuator provided in an embodiment of the present disclosure;

[0047] Fig.16 A partial schematic diagram of a second actuator provided in an embodiment of the present disclosure.

[0048] The reference numerals in the figures represent respectively:

[0049] 1-housing assembly; 2-variable aperture; 3-lens assembly; 4-first actuator; 5-second actuator;

[0050] 20- roller; 21- rotating bracket; 22- blade; 23- base; 24- stator; 25- rotor; 26- flexible circuit board; 27- gasket; 28- cover plate; 41- base; 42- lens holder; 43- first spring sheet; 44- second spring sheet; 45- second magnet; 46- second coil; 51- support member; 52- supporting member; 53- SMA wire; 54- ball bearing;

[0051] 211-installation slot; 212-sliding column; 213-second limiting portion; 220-aperture hole; 221-rotation hole; 222-sliding slot; 223-first edge; 224-second edge;

[0052] 231 - accommodating groove; 232 - through hole; 233 - first limiting portion; 234 - rotating shaft; 235 - limiting column; 270 - light-transmitting hole; 411 - accommodating cavity; 521 - groove.

[0053] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0055] The disclosed embodiment provides a variable aperture. Figure 1 A schematic diagram of a variable aperture provided in an embodiment of the present disclosure, Figure 2 An exploded view of a variable aperture provided by an embodiment of the present disclosure. Figure 1 and 2 As shown, the variable aperture 2 includes a roller 20, a rotating bracket 21, a plurality of blades 22 and a base 23. The base 23 is annular and is sleeved outside the rotating bracket 21. The roller 20 is located between the base 23 and the rotating bracket 21 and is rollingly connected to the base 23 and the rotating bracket 21. The plurality of blades 22 are annularly distributed on one side of the base 23 and surround an aperture hole 220. The plurality of blades 22 are rotatably connected to the base 23 and are slidably connected to the rotating bracket 21.

[0056] In the variable aperture 2 provided in the embodiment of the present disclosure, a plurality of blades 22 are arranged on one side of the base 23, are rotatably connected to the base 23, and are slidably connected to the rotating bracket 21, so as to form an aperture hole 220 with adjustable aperture. A roller 20 is arranged between the base 23 and the rotating bracket 21, and the roller 20 can roll when the rotating bracket 21 rotates relative to the base 23, thereby reducing the friction between the base 23 and the rotating bracket 21. Since the roller 20 has a larger contact area with the base 23 and the rotating bracket 21, the roller 20 can absorb more energy when impacted, and the roller 20, the base 23 and the rotating bracket 21 are not easily deformed, thereby improving the stability of the relative rotation of the base 23 and the rotating bracket 21.

[0057] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0058] like Figure 2 As shown, the variable aperture 2 provided by the embodiment of the present disclosure includes a roller 20, a rotating bracket 21, a plurality of blades 22 and a base 23. The base 23 is annular, the rotating bracket 21 is cylindrical, the base 23 is sleeved outside the rotating bracket 21, and the base 23 and the rotating bracket 21 are coaxially arranged. A plurality of blades 22 are located on the same side of the base 23 and the rotating bracket 21, and each blade 22 is slidably connected to the rotating bracket 21 and rotatably connected to the base 23. The roller 20 is located between the outer surface of the rotating bracket 21 and the base 23, and the roller 20 is respectively against the rotating bracket 21 and the base 23. The rotating bracket 21 can rotate relative to the base 23, and when the rotating bracket 21 rotates relative to the base 23, the roller 20 can roll, thereby reducing the friction between the rotating bracket 21 and the base 23. The plurality of blades 22 surround an aperture hole 220, and when the rotating bracket 21 rotates relative to the base 23, the blades 22 rotate relative to the base 23, thereby changing the size of the aperture hole 220.

[0059] In some embodiments of the present disclosure, Figure 2 As shown, the variable aperture 2 further includes a cover plate 28, which is arranged to cover the side of the blades 22 away from the rotating bracket 21 and is connected to the base 23. The cover plate 28 is used to cover the plurality of blades 22, the rotating bracket 21 and the base 23 to protect the rotating aperture 2.

[0060] In some embodiments of the present disclosure, Figure 2 As shown, the variable aperture 2 further includes a stator 24 and a rotor 25, wherein the stator 24 is connected to the inner peripheral side of the base 23, and the rotor 25 is connected to the outer peripheral side of the rotating bracket 21, and the stator 24 is opposite to the rotor 25. The stator 24 of the stator 24 and the rotor 25 is configured to drive the rotor 25 to move, so that the rotating bracket 21 can rotate relative to the base 23, thereby driving the plurality of blades 22 to move, so as to adjust the size of the aperture hole 220.

[0061] Alternatively, see Figure 2 , the stator 24 is a first coil, and the rotor 25 is a first magnet. When the first coil is energized, the circular current can exert a thrust on the first magnet, so that the first magnet drives the rotating bracket 21 to rotate.

[0062] In some embodiments of the present disclosure, Figure 2 As shown, the variable aperture 2 further includes a flexible circuit board 26, which is annular and sleeved outside the base 23. The flexible circuit board 26 is electrically connected to the first coil. The flexible circuit board 26 surrounds the outer side of the base 23 and is fixedly connected to the base 23. The flexible circuit board 26 is used to energize the first coil to drive the rotating bracket 21 to rotate.

[0063] Figure 3 A schematic diagram of a base of a variable aperture provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Figure 3 As shown, the inner peripheral side surface of the base 23 is provided with a receiving groove 231, and the roller 20 is located in the receiving groove 231, and the cylindrical surface of the roller 20 is respectively against the bottom wall of the receiving groove 231 and the outer peripheral side surface of the rotating bracket 21. The depth of the receiving groove 231 in the wall thickness direction of the base 23 is slightly smaller than the diameter of the roller 20, so that the cylindrical surface of the roller 20 can protrude from the inner peripheral side surface of the base 23, thereby being against the rotating bracket 21. The receiving groove 231 can reduce the interval between the rotating bracket 21 and the base 23, so that the roller 20 has a larger diameter, which is conducive to increasing the contact surface area between the roller 20 and the rotating bracket 21 and the base 23, thereby improving the stability of the rotation.

[0064] Alternatively, see Figure 3 , there are two rollers 20 and two receiving grooves 231, two rollers 20 are respectively located in the two receiving grooves 231, and the stator 24 is located between the two rollers 20. The two rollers 20 have the same size and are located close to the stator 24, so that a certain distance can be spaced between the stator 24 and the rotor 25. In other embodiments, there can be multiple rollers 20, and the size of each roller 20 can also be different.

[0065] In some embodiments of the present disclosure, Figure 3 As shown, the base 23 is provided with a through hole 232, and the stator 24 is located in the through hole 232. One side of the stator 24 is opposite to the rotor 25, and the side of the stator 24 away from the rotor 25 is connected to the flexible circuit board 26, so as to supply power to the stator 24.

[0066] Exemplarily, the base 23 is provided with two through holes 232 , the variable aperture 2 includes two stators 24 , each stator 24 is located in one through hole 232 , and the two through holes 232 are located between the two receiving grooves 231 to increase the area between the stator 24 and the rotor 25 .

[0067] Figure 4 A schematic diagram of a base of a variable aperture provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Figure 4 As shown, the inner peripheral side of the base 23 is provided with a first limiting portion 233, and the first limiting portion 233 is located on the side of the base 23 away from the blade 22. The first limiting portion 233 can cooperate with the rotating bracket 21 to limit the angle through which the rotating bracket 21 can rotate.

[0068] Figure 5 A schematic diagram of a rotating support for a variable aperture provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Figure 5 As shown, the rotating bracket 21 is provided with a mounting groove 211, and the rotor 25 is located in the mounting groove 211. The rotor 25 is fixedly connected to the rotating bracket 21, and the surface of the rotor 25 close to the stator 24 is cylindrical, so that when the rotating bracket 21 rotates, the distance between the rotor 25 and the stator 24 remains unchanged.

[0069] Figure 6 A schematic diagram of a rotating support for a variable aperture provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Figure 6 As shown, a second limiting portion 213 is provided at one end of the rotating bracket 21 away from the blade 22 , and the second limiting portion 213 is used to cooperate with the first limiting portion 233 to limit the angle through which the rotating bracket 21 can rotate.

[0070] Exemplarily, the first limiting portion 233 is two protrusions, and the second limiting portion 213 is two grooves. Each protrusion is located in one groove, and the width of the groove is greater than the width of the protrusion, thereby providing a rotatable space for the rotating diameter 21.

[0071] Figure 7 Schematic diagram of a variable aperture provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Figure 7 As shown, the blade 22 is provided with a rotation hole 221 and a slide groove 222, a rotation shaft 234 is provided on the end surface of the base 23, and the rotation shaft 234 is rotationally matched with the rotation hole 221, and a sliding column 212 is provided on the end surface of the rotating bracket 21, and the sliding column 212 is slidingly matched with the slide groove 222. When the rotating bracket 21 rotates relative to the base 23, the sliding column 212 slides in the slide groove 222, thereby driving the blade 22 to rotate with the rotation shaft 234 as the rotation axis, thereby adjusting the size of the aperture hole 220.

[0072] Exemplarily, the variable aperture 2 includes six blades 22, three blades 22 are stacked on the other three blades 22, and the blades 22 in the same layer are spaced apart from each other, wherein the blades 22 in one layer are stacked on the space between two adjacent blades 22 in another layer.

[0073] The aperture hole 220 formed by the blades 22 provided in the embodiment of the present disclosure has a range of f / 1.4-f / 4. When the aperture hole 220 becomes the smallest, the camera module provided with the variable aperture 2 can be used to shoot starbursts and obtain a better shooting effect. The variable aperture 2 provided in the embodiment of the present disclosure can achieve stepless adjustment of the aperture. That is, by precisely controlling the relative rotation angle between the base 23 and the rotating bracket 21 in the variable aperture 2, the movement step length of each blade 22 is small, thereby achieving the following: Figure 7 Many kinds of apertures, including the shape of the aperture hole 220 shown, can meet the shooting needs of users in various usage scenarios.

[0074] For example, when using the variable aperture 2 to shoot a video, the light in the shot scene may change gradually or suddenly. The variable aperture 2 provided in the embodiment of the present disclosure can adjust the size of the aperture according to the ambient light in real time, achieve ultra-high exposure flexibility, automatically adapt to changes in light, and achieve better shooting effects.

[0075] Figure 8 A schematic diagram of blades and spacers of a variable aperture is provided for an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Figure 8 As shown, the variable aperture 2 further includes a gasket 27 , which is located between the blades 22 and the rotating bracket 21 . The gasket 27 has a light-transmitting hole 270 , and the light-transmitting hole 270 is arranged cocentrically with the aperture hole 220 .

[0076] It should be noted that the diameter of the light-transmitting hole 270 is not greater than the maximum diameter of the aperture hole 220. The light-transmitting hole 270 can limit the maximum effective diameter of the aperture hole 220, so that when the aperture of the aperture 220 is at its maximum, the projection of the blade 22 on the gasket 27 does not overlap with the light-transmitting hole 270.

[0077] See also Figure 7 A plurality of limiting posts 235 are provided at one end of the base 23 close to the blade 22, and the plurality of limiting posts 235 are arranged along the axis of the base 23. Figure 8 As shown, a plurality of limiting grooves 271 are provided around the gasket 27, and each limiting groove 271 is clamped outside the limiting column 235 to fix the gasket 27 to the base 23 to prevent the gasket 27 from moving when the blade 23 rotates.

[0078] Fig. 9 A schematic diagram of blades of a variable aperture provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Fig. 9As shown, the blade 22 includes a first edge 223 and a second edge 224, one end of the first edge 223 is connected to one end of the second edge 224, the first edge 223 is a straight line, and the second edge 224 is a curved line, and the aperture hole 220 is surrounded by the first edge 223 of each blade 22, or the aperture hole 220 is surrounded by the first edge 223 and the second edge 224 of each blade 22.

[0079] Specifically, when the aperture hole 220 has a larger diameter, the aperture hole 220 is surrounded by the first edge 223 and the second edge 224 of each blade 22. When the aperture hole 220 has a smaller diameter, the aperture hole 220 is surrounded by the first edge 223 of each blade 22.

[0080] Optionally, the blades 22 provided in the embodiment of the present disclosure are in the shape of a cicada wing, and the thickness of each blade 22 is 40 μm-120 μm.

[0081] Optionally, the thickness of the blade 22 provided in the embodiment of the present disclosure is 55 μm. The material of the blade 22 is polyimide, and the surface of the blade 22 is coated with a carbon layer. Polyimide is a high temperature resistant material, not easy to deform, and can increase the service life of the blade 22. The carbon layer can ensure the light-proof performance of the blade 22, which is beneficial to improving the shooting effect. In the process of manufacturing the blade 22, chemical vapor evaporation, magnetron sputtering, physical vapor deposition and other processes can be selected to achieve carbon plating. Optionally, carbon plating can be performed on one or both sides of the blade 22.

[0082] Fig.10 A schematic diagram of a flexible circuit board and a stator of a variable aperture provided in an embodiment of the present disclosure. Fig.10 As shown, the stator 24 is located in the through hole 232 , and a side of the stator 24 away from the rotor 25 is connected to the inner circumferential side of the flexible circuit board 26 .

[0083] In addition, the present disclosure also provides a camera module. Fig.11 This is an exploded view of the camera module provided by the embodiment of the present disclosure. Fig.11 As shown, the camera module includes any one of the variable aperture 2 in the above embodiments, a lens assembly 3, a first actuator 4 and a second actuator 5. The variable aperture 2 is connected to the lens assembly 3 and is located on the light-incoming side of the lens assembly 3, the first actuator 4 is connected to the side of the lens assembly 3 away from the variable aperture 2, and the second actuator 5 is connected to the side of the first actuator 4 away from the lens assembly 3.

[0084] In the camera module provided by the embodiment of the present disclosure, a plurality of blades 22 of the variable aperture 2 are arranged on one side of the base 23, are rotatably connected to the base 23, and are slidably connected to the rotating bracket 21, forming an aperture hole 220 with adjustable aperture. A roller 20 is arranged between the base and the rotating bracket, and the roller 20 can roll when the rotating bracket 21 rotates relative to the base 23, thereby reducing the friction between the base 23 and the rotating bracket 21. Since the roller 20 has a larger contact area with the base 23 and the rotating bracket 21, the roller 20 can absorb more energy when impacted, and the roller 20, the base 23 and the rotating bracket 21 are not easily deformed, thereby improving the stability of the relative rotation of the base 23 and the rotating bracket 21, and is conducive to increasing the service life of the camera module. The first actuator 4 and the second actuator 5 can adjust the position of the lens assembly 3, so that the camera module can realize the functions of automatic focus and optical image stabilization.

[0085] In some embodiments of the present disclosure, Fig.11 As shown, the camera module also includes a housing assembly 1 , which is covered on the variable aperture 2 , and is connected to the second actuator 5 .

[0086] Fig.12 An exploded view of a first actuator of a camera module provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, Fig.12 As shown, the first actuator 4 includes a base 41 and a lens frame 42. The lens frame 42 is connected to the lens assembly 3. The base 41 has a receiving cavity 411. The lens frame 42 is located in the receiving cavity 411 and is movably connected to the base 41. The lens frame 42 can be telescopically moved relative to the base 41, thereby driving the lens assembly 3 to move toward or away from the base 41, so that the lens assembly 3 can automatically focus.

[0087] Alternatively, if Fig.12 As shown, the first actuator 4 further includes a first spring piece 43 and a second spring piece 44, the lens frame 42 is located between the first spring piece 43 and the second spring piece 44, the first spring piece 43 is connected to the lens frame 42 and the base 41 respectively, and the second spring piece 44 is connected to the lens frame 42 and the base 41 respectively. The first spring piece 43 and the second spring piece 44 can be elastically deformed when the lens frame 42 moves relative to the base 41, thereby increasing the resistance of the lens frame 42 when it moves, and allowing the lens frame 42 to automatically return to its initial position.

[0088] Exemplarily, the first elastic piece 43 and the second elastic piece 44 are both annular, the inner ring regions of the first elastic piece 43 and the second elastic piece 44 are connected to the lens holder 42 , and the outer ring regions of the first elastic piece 43 and the second elastic piece 44 are connected to the base 41 .

[0089] In some embodiments of the present disclosure, Fig.12As shown, the first actuator 4 further includes a second magnet 45 and a second coil 46. The second magnet 45 is connected to the base 41, and the second coil 46 is connected to the lens holder 42. The second magnet 45 is opposite to the second coil 46. The second coil 46 is connected to the flexible circuit board 26 to supply power to the second coil 46.

[0090] Exemplarily, the first actuator 4 includes two second magnets 45 and two second coils 46, the two second magnets 45 are located on opposite sides of the lens frame 42, and the two second coils 46 are located on opposite sides of the lens frame 42. The two second coils 46 can be energized at the same time to control the movement of the two second magnets 45, thereby improving the stability of the lens frame 41 when moving.

[0091] Fig.13 An exploded view of a second actuator of a camera module provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, Fig.13 As shown, the second actuator 5 includes a support member 51 and a support member 52. One side of the support member 51 is connected to the first actuator 4, and the side of the support member 51 away from the first actuator 4 is movably connected to the support member 52. The support member 51 can translate relative to the support member 52 in a first plane, and the first plane is parallel to the plane where the support member 52 is located. The second actuator 5 is used to adjust the position of the lens assembly 3, so that the camera module has an optical image stabilization function.

[0092] In some embodiments of the present disclosure, Fig.13 As shown, the second actuator 5 includes at least four SMA (shape memory alloys) wires 53. The support member 51 has four sides. The SMA wires 53 are respectively located on the four sides of the support member 51. One end of each SMA wire 53 is connected to a corner of the support member 51, and the other end of each SMA wire is connected to the support member 52. When the SMA wire 53 is energized, the length of the SMA wire 53 changes, so that the support member 51 can be translated relative to the support member 52.

[0093] Fig.14 A schematic diagram of a support member of a second actuator provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, such as Fig.14 As shown, the second actuator 5 further includes a plurality of balls 54. A plurality of grooves 521 are provided on one side of the support member 52 close to the support member 51. The balls 54 are located in the grooves 521, and the balls 54 abut against the support member 51. When the support member 51 moves relative to the support member 52, the balls 54 can cause rolling friction between the support member 51 and the support member 52, thereby reducing the friction between the support member 51 and the support member 52.

[0094] Fig.15 A schematic diagram of a supporting member of a second actuator provided in an embodiment of the present disclosure. Fig.15As shown, the support member 51 includes a main body 513, two first connecting parts 511 and two elastic parts 512. The main body 513 is rectangular, the two first connecting parts 511 are respectively connected to two mutually spaced corners of the main body 513, and the two elastic parts 512 are respectively connected to the other two corners of the main body 513. One end of two adjacent SMA wires 53 is connected to one first connecting part 511, and one end of the other two adjacent SMA wires 53 is connected to the other first connecting part 511. The two elastic parts 512 can be elastically deformed when the support member 51 moves relative to the supporting member 52, so as to limit the movable distance of the support member 51 and reset the support member 51.

[0095] Fig.16 FIG. 1 is a partial schematic diagram of a second actuator provided in an embodiment of the present disclosure. Fig.16 As shown, the supporting member 52 has two second connection parts 522, the other ends of two adjacent SMA wires 53 are connected to one second connection part 522, and the other ends of the other two adjacent SMA wires 53 are connected to the other second connection part 522. The second connection part 522 and the first connection part 511 are located on the same plane to prevent the SMA wire 53 from bending when deforming.

[0096] Alternatively, if Figure 6 As shown, the elastic portion 512 is in the shape of a meandering strip and is bent at the corner of the main body portion 513 to form a U-shaped structure. The U-shaped structure is located between the ends of two adjacent SMA wires 53 .

[0097] In addition, an embodiment of the present disclosure also provides an electronic device, including any camera module provided in the above embodiments.

[0098] In the electronic device provided by the embodiment of the present disclosure, a plurality of blades 22 of the camera module are arranged on one side of the base 23, are rotatably connected to the base 23, and are slidably connected to the rotating bracket 21, forming an aperture hole 220 with adjustable aperture. A roller 20 is arranged between the base 23 and the rotating bracket 21, and the roller 20 can roll when the rotating bracket 21 rotates relative to the base 23, thereby reducing the friction between the base 23 and the rotating bracket 21. Since the roller 20 has a larger contact area with the base 23 and the rotating bracket 21, the roller 20 can absorb more energy when impacted, and the roller 20, the base 23 and the rotating bracket 21 are not easily deformed, thereby improving the stability of the relative rotation of the base 23 and the rotating bracket 21, and is conducive to increasing the service life of the camera module. The first actuator 4 and the second actuator 5 can adjust the position of the lens assembly 3, so that the camera module can realize the functions of automatic focus and optical image stabilization.

[0099] The electronic device provided by the embodiments of the present disclosure may be, but is not limited to, a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 player (Moving Picture Experts Group Audio Layer IV), and a laptop computer. The electronic device may also be referred to as a user device, a portable terminal, a laptop terminal, or other names.

[0100] It should be noted that the "several" and "at least one" mentioned in this article refer to one or more, and "multiple" and "at least two" refer to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0101] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0102] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0103] In the description of the present disclosure, 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", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0104] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0105] The above descriptions are merely embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A variable aperture (2), characterized in that: It comprises a roller (20), a rotating bracket (21), a plurality of blades (22) and a base (23); The base (23) is annular and is sleeved outside the rotating bracket (21). The roller (20) is located between the base (23) and the rotating bracket (21) and is rollingly connected to the base (23) and the rotating bracket (21). The plurality of blades (22) are distributed in an annular shape on one side of the base (23) and surround an aperture hole (220); the plurality of blades (22) are rotatably connected to the base (23) and are slidably connected to the rotating bracket (21).

2. The variable aperture (2) according to claim 1, characterized in that: The inner peripheral side surface of the base (23) is provided with a receiving groove (231), the roller (20) is located in the receiving groove (231), and the cylindrical surface of the roller (20) is respectively against the bottom wall of the receiving groove (231) and the outer peripheral side surface of the rotating bracket (21).

3. The variable aperture (2) according to claim 2, characterized in that: It also includes a stator (24) and a rotor (25), wherein the stator (24) is connected to the inner peripheral side surface of the base (23), and the rotor (25) is connected to the outer peripheral side surface of the rotating bracket (21), and the stator (24) and the rotor (25) are opposite to each other.

4. The variable aperture (2) according to claim 3, characterized in that: There are two rollers (20) and two receiving grooves (231), two rollers (20) are respectively located in the two receiving grooves (231), and the stator (24) is located between the two rollers (20).

5. The variable aperture (2) according to claim 3, characterized in that: The rotating bracket (21) is provided with a mounting groove (211), and the rotor (25) is located in the mounting groove (211).

6. The variable aperture (2) according to claim 3, characterized in that: The base (23) is provided with a through hole (232), and the stator (24) is located in the through hole (232).

7. The variable aperture (2) according to any one of claims 3 to 6, characterized in that: The stator (24) is a first coil, and the rotor (25) is a first magnet.

8. The variable aperture (2) according to claim 7, characterized in that: It also includes a flexible circuit board (26), which is annular and sleeved outside the base (23), and the flexible circuit board (26) is electrically connected to the first coil.

9. The variable aperture (2) according to claim 8, characterized in that: The blade (22) is provided with a rotating hole (221) and a sliding groove (222); a rotating shaft (234) is provided on the end surface of the base (23); the rotating shaft (234) is rotatably matched with the rotating hole (221); a sliding column (212) is provided on the end surface of the rotating bracket (21); the sliding column (212) is slidably matched with the sliding groove (222).

10. The variable aperture (2) according to any one of claims 1 to 6, characterized in that: It also includes a gasket (27), the gasket (27) being located between the blade (22) and the rotating bracket (21), the gasket (27) having a light-transmitting hole (270), and the light-transmitting hole (270) being arranged cocentrically with the aperture hole (220).

11. The variable aperture (2) according to any one of claims 1 to 6, characterized in that: The thickness of the blade (22) is 40 μm-120 μm.

12. The variable aperture (2) according to claim 11, characterized in that: The thickness of the blade (22) is 55 μm.

13. The variable aperture (2) according to any one of claims 1 to 6, characterized in that: The blade (22) comprises a first edge (223) and a second edge (224); one end of the first edge (223) is connected to one end of the second edge (224); the first edge (223) is in a straight line shape, and the second edge (224) is in a curved line shape; the aperture hole (220) is surrounded by the first edge (223) of each of the blades (22), or the aperture hole (220) is surrounded by the first edge (223) and the second edge (224) of each of the blades (22).

14. A camera module, characterized in that: Comprising the variable aperture (2), a lens assembly (3), a first actuator (4) and a second actuator (5) according to any one of claims 1 to 13; The variable aperture (2) is connected to the lens assembly (3) and is located on the light-incoming side of the lens assembly (3); the first actuator (4) is connected to a side of the lens assembly (3) away from the variable aperture (2); and the second actuator (5) is connected to a side of the first actuator (4) away from the lens assembly (3).

15. The camera module according to claim 14, characterized in that: The first actuator (4) comprises a base (41) and a lens frame (42), wherein the lens frame (42) is connected to the lens assembly (3), the base (41) has a receiving cavity (411), the lens frame (42) is located in the receiving cavity (411), and is movably connected to the base (41).

16. The camera module according to claim 15, characterized in that: The first actuator (4) further comprises a first spring sheet (43) and a second spring sheet (44); the lens frame (42) is located between the first spring sheet (43) and the second spring sheet (44); the first spring sheet (43) is connected to the lens frame (42) and the base (41) respectively; and the second spring sheet (44) is connected to the lens frame (42) and the base (41) respectively.

17. The camera module according to claim 15, characterized in that: The first actuator (4) further comprises a second magnet (45) and a second coil (46); the second magnet (45) is connected to the base (41); the second coil (46) is connected to the lens frame (42); and the second magnet (45) is opposite to the second coil (46).

18. The camera module according to claim 14, characterized in that: The second actuator (5) comprises a support member (51) and a bearing member (52); one side of the support member (51) is connected to the first actuator (4); and a side of the support member (51) away from the first actuator (4) is movably connected to the bearing member (52).

19. The camera module according to claim 18, characterized in that: The second actuator (5) comprises at least four SMA wires (53), the support member (51) has four side surfaces, the SMA wires (53) are respectively located on the four side surfaces of the support member (51), one end of each of the SMA wires (53) is connected to a corner of the support member (51), and the other end of each of the SMA wires is connected to the supporting member (52).

20. The camera module according to claim 18, characterized in that: The second actuator (5) further comprises a plurality of balls (54); a plurality of grooves (521) are provided on a side of the supporting member (52) close to the support member (51); the balls (54) are located in the grooves (521); and the balls (54) abut against the support member (51).

21. An electronic device, characterized in that: A camera module comprising any one of claims 14 to 20.

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