Variable aperture and camera module with variable aperture

Abstract

The invention provides a variable aperture and a camera module with the variable aperture, the variable aperture comprises a blade assembly, a blade carrier and a driving mechanism, the blade assembly comprises a plurality of blade units, and the blade units of the blade assembly are sequentially arranged in a ring shape along the circumferential direction of the blade carrier. A light through hole with an adjustable aperture is formed; the blade carrier comprises a fixed carrier and a movable carrier, the blade units of the blade assembly are movably arranged on the fixed carrier and connected with the movable carrier, the fixed carrier is provided with a movable containing cavity, and the movable carrier is movably arranged in the movable containing cavity of the fixed carrier; and the driving mechanism is arranged in the movable accommodating cavity of the fixed carrier.

Description

Technical Field

[0001] The present invention relates to the field of camera technology, and in particular to a variable aperture and a camera module with the variable aperture. Background Art

[0002] Apertures are commonly found in SLR cameras and are used to adjust the size of the aperture for light to pass through. Together with the shutter of the camera module, they can determine the amount of light entering. The amount of light entering here can affect the depth of field and image quality. The aperture that can adjust the amount of light entering includes multiple blades, which are arranged in a ring to form a light hole for light to pass through. Driving the multiple blades to move can adjust the size of the light hole, thereby achieving the purpose of changing the amount of light entering.

[0003] With the development of technology, electronic devices such as mobile phones and tablets have higher and higher requirements for camera functions, in order to achieve camera effects close to SLRs. However, the overall structure of the aperture used in SLR devices is too large to be applied to such electronic devices. As demand continues to increase, the camera modules of mobile phones, tablets and other electronic devices are gradually becoming smaller and thinner. Therefore, when adding a variable aperture to the camera module, it is necessary to consider not only the overall size of the camera module, but also the stability and reliability of the aperture operation.

[0004] In addition, the camera module of the prior art is provided with a variable aperture. By changing the size of the aperture hole of the variable aperture, the light intensity of the incident light can be adjusted, thereby greatly improving the imaging quality of the camera module. However, the conventional variable aperture is to adjust the aperture hole size by driving the blades to move through a voice coil motor. Since the voice coil motor is susceptible to electromagnetic interference, the size of the aperture hole is not easy to accurately adjust. Summary of the invention

[0005] A major advantage of the present invention is that it provides a variable aperture and a camera module with a variable aperture, wherein the variable aperture is driven by piezoelectric ceramics to drive the blade assembly to move, thereby adjusting the size of the aperture hole.

[0006] Another advantage of the present invention is that it provides a variable aperture and a camera module with a variable aperture, wherein the piezoelectric ceramic is arranged below the blade assembly, occupies a small volume, does not increase the size of the camera module in the width direction, and is conducive to the miniaturization and thinness of the entire camera module.

[0007] According to one aspect of the present invention, a variable aperture of the present invention that can achieve the above-mentioned objects and other objects and advantages includes:

[0008] A blade assembly, wherein the blade assembly comprises a plurality of blade units, the blade units of the blade assembly are sequentially arranged in a ring shape along the circumferential direction of the blade carrier, and form the light-through hole with an adjustable aperture size;

[0009] a blade carrier, the blade carrier comprising a fixed carrier and a movable carrier, the blade unit of the blade assembly is movably arranged on the fixed carrier and connected to the movable carrier, the fixed carrier is provided with a movable accommodating cavity, and the movable carrier is movably arranged in the movable accommodating cavity of the fixed carrier; and

[0010] A driving mechanism, wherein the driving mechanism is arranged in the movable accommodating cavity of the fixed carrier and is connected to the movable carrier, the driving mechanism can drive the blade carrier to move in the movable accommodating cavity, and the movable carrier drives each blade unit of the blade assembly to rotate to adjust the size of the light-through hole.

[0011] According to one embodiment of the present invention, the blade unit further includes a movable end and a fixed end extending integrally from the movable end, wherein the fixed end of the blade unit is arranged on the blade carrier, and the blade carrier is connected to the movable end of the blade unit, and the blade carrier can drive the movable end of the blade unit to rotate around the fixed end.

[0012] According to one embodiment of the present invention, the driving mechanism includes a piezoelectric ceramic component and a guide, wherein the guide is traversably arranged between the piezoelectric ceramic component and the movable carrier of the blade carrier, and the piezoelectric ceramic component drives the movable carrier of the blade carrier to move via the guide.

[0013] According to one embodiment of the present invention, the guide of the driving mechanism is disposed below the movable carrier, and the piezoelectric ceramic component and the guide of the driving mechanism are arranged along the circumferential direction of the movable carrier, wherein the driving force generated between the piezoelectric ceramic component and the guide acts on the movable carrier.

[0014] According to one embodiment of the present invention, the piezoelectric ceramic component further includes two piezoelectric ceramic units and a resonant body arranged between the two piezoelectric ceramic units, wherein the two piezoelectric ceramic units are symmetrically arranged up and down relative to the resonant body, and one end of the resonant body is connected to the guide of the driving mechanism.

[0015] According to an embodiment of the present invention, the resonance frequency of the piezoelectric ceramic unit resonates with a certain order of natural frequency of the resonant body, so that it vibrates in the mode of this order.

[0016] According to one embodiment of the present invention, the resonator includes a transmission end and at least two tuning forks extending integrally from the transmission end, wherein the tuning forks extend integrally inward from both sides of the transmission end to form a clamping opening with a gradually smaller opening, and the guide is clamped in the clamping opening by the tuning forks.

[0017] According to one embodiment of the present invention, the transmission end of the resonant body is clamped by the piezoelectric ceramic unit, and when the piezoelectric ceramic assembly is electrically conducted, the piezoelectric ceramic unit resonates with the resonant body, and the transmission end of the resonant body transmits vibration to the tuning fork, wherein the tuning fork clamps the guide to move in a specific direction.

[0018] According to one embodiment of the present invention, it further comprises a circuit board, wherein the circuit board is electrically connected to the driving mechanism, and the circuit board can electrically conduct the piezoelectric ceramic component of the driving mechanism.

[0019] According to one embodiment of the present invention, the circuit board is arranged below the blade carrier, and the driving mechanism is arranged on the circuit board, and the circuit board supports the driving mechanism. The circuit board has a bearing surface, and the piezoelectric ceramic component and the guide of the driving mechanism are arranged on the bearing surface of the circuit board.

[0020] According to an embodiment of the present invention, the guide is supported between the circuit board and the movable carrier, and the guide supports the movable carrier in the movable accommodation space of the fixed carrier in a suspended manner.

[0021] According to one embodiment of the present invention, the fixed carrier includes a carrier base and an inner annular wall and an outer annular wall extending integrally from the carrier base, and the fixed carrier is further provided with at least one penetration groove, wherein the at least one penetration groove is formed in the carrier base of the fixed carrier, and the penetration groove passes through the upper and lower surfaces of the carrier base, and the driving mechanism is arranged in the penetration groove of the fixed carrier.

[0022] According to an embodiment of the present invention, it further comprises at least one supporting member, wherein the supporting member is disposed between the movable carrier and the circuit board, and is used to support the movable carrier to rotate in the movable accommodating space.

[0023] According to one embodiment of the present invention, the fixed carrier further includes a plurality of blade support columns, the fixed end of the blade unit is arranged on the blade support column of the fixed carrier, the blade support column is arranged on the outer annular wall of the fixed carrier, and the blade support column extends upward from the outer annular wall as a whole.

[0024] According to an embodiment of the present invention, the movable carrier includes a carrier ring and a plurality of blade transmission rods formed on the carrier ring, wherein the blade transmission rods of the movable carrier are connected to the blade units.

[0025] According to another aspect of the present application, the present application further provides a camera module, including:

[0026] Photosensitive components;

[0027] lens assembly; and

[0028] A variable aperture as described above, wherein the lens assembly and the lens assembly are arranged at the front end of the light incident direction of the photosensitive component along the photosensitive path of the photosensitive component, and the variable aperture has a light hole with adjustable size for adjusting the amount of light entering the photosensitive component.

[0029] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0030] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings, unless otherwise specified, the same reference numerals are used to represent the same components. Among them:

[0032] Figure 1 It is a schematic diagram of the overall structure of a camera module according to the first preferred embodiment of the present invention.

[0033] Figure 2 It is a schematic diagram of the overall structure of a variable aperture of the camera module according to the first preferred embodiment of the present invention.

[0034] Figure 3 It is a schematic diagram of the decomposition of the variable aperture of the camera module according to the first preferred embodiment of the present invention.

[0035] Figure 4 It is a cross-sectional view of the variable aperture of the camera module according to the first preferred embodiment of the present invention.

[0036] Figure 5 It is a schematic structural diagram of the movable carrier of the variable aperture of the camera module according to the first preferred embodiment of the present invention.

[0037] Figure 6 It is a schematic diagram of the driving mechanism of the variable aperture of the camera module according to the first preferred embodiment of the present invention.

[0038] Fig. 7A and Figure 7B It is a schematic diagram of the operation of the variable aperture driving mechanism of the camera module according to the first preferred embodiment of the present invention.

[0039] Figure 8 It is a schematic diagram of the fixed carrier structure of the variable aperture of the camera module according to the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0040] It should be pointed out that the embodiments shown in the drawings are only used as examples to specifically and vividly explain and illustrate the concept of the present invention. The size and structure thereof are not necessarily drawn to scale, nor do they constitute a limitation to the concept of the present invention.

[0041] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the various drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0042] Referring to the drawings of this application specification Figures 1 to 8 As shown, a variable aperture and a camera module with a variable aperture according to the first preferred embodiment of the present application are explained in the following description. The camera module includes a photosensitive component 10, a lens component 20 arranged in the photosensitive path of the photosensitive component 10, and a variable aperture 30, wherein the variable aperture 30 is located at the front end of the light incident direction of the lens component 20, and the variable aperture 30 has an adjustable light hole 301, so as to adjust the amount of light entering the lens component 20 according to the shooting requirements, thereby improving the shooting quality of the image.

[0043] The variable aperture 30 includes a blade assembly 31, a blade carrier 32 and a driving mechanism 33, wherein the blade assembly 31 is movably arranged on the blade carrier 32, and the driving mechanism 33 is connected to the blade carrier 32. The driving mechanism 33 can drive the blade carrier 32 and drive the blade assembly 31 to move so as to adjust the aperture size of the light-transmitting hole 301 formed by the blade assembly 31.

[0044] The blade assembly 31 includes a plurality of blade units 311, wherein the blade units 311 of the blade assembly 31 are sequentially arranged in a ring shape along the circumferential direction of the blade carrier 32, and form the light-through hole 301 with an adjustable aperture size. It is worth mentioning that in this preferred embodiment of the present application, the number of the blade units 311 of the blade assembly 31 is at least three, and the light-through hole 301 formed by the blade units 311 of the blade assembly 31 is a circular variable light-through hole.

[0045] In a specific example of the present application, the number of the blade units 311 of the blade assembly 31 is six. It is understandable that in another optional embodiment of the present application, the number of the blade units 311 may also be five, seven, eight or other numbers, which is not limited by the present application.

[0046] The blade unit 311 of the blade assembly 31 further includes a movable end 3111 and a fixed end 3112 integrally extending from the movable end 311, wherein the fixed end 3112 of the blade unit 311 is disposed on the blade carrier 32, and the blade carrier 32 is connected to the movable end 3111 of the blade unit 311, and the blade carrier 32 can drive the movable end 3111 of the blade unit 311 to rotate around the fixed end 3112. It is worth mentioning that the blade carrier 32 drives each of the blade units 311 of the blade assembly 31 to rotate synchronously, thereby changing the aperture size of the light-through hole 301 formed by the blade assembly 31.

[0047] The blade carrier 32 includes a fixed carrier 321 and a movable carrier 322, wherein the movable end 3111 of the blade unit 311 is connected to the movable carrier 322 of the blade carrier 32, the fixed end 3112 of the blade unit 311 is connected to the fixed carrier 321 of the blade carrier 32, and the movable carrier 322 of the blade carrier 32 is connected to the driving mechanism 33, and the driving mechanism 33 drives the movable carrier 322 of the blade carrier 32 to move relative to the fixed carrier 321, thereby driving the blade units 311 connected thereto to move synchronously.

[0048] The movable end 3111 of the blade unit 311 moves with the movable carrier 322, and the fixed end 3112 of the blade unit 311 is pivotally fixed to the fixed carrier 321 of the blade carrier 32. The movable end 3111 of the blade unit 311 is driven by the movable carrier 322 and rotates based on the fixed end 3112, thereby realizing the opening and closing of the light hole 301.

[0049] The movable carrier 322 of the blade carrier 32 is pivotally arranged on the inner side of the fixed carrier 321, and the driving mechanism 33 can drive the movable carrier 322 to rotate along a specific direction (clockwise or counterclockwise) on the inner side of the fixed carrier 321, and then the movable carrier 322 drives the blade units 311 connected thereto to move to adjust the aperture size of the light-transmitting hole 301.

[0050] The fixed carrier 321 of the blade carrier 32 is provided with a movable accommodating cavity 3210 , wherein the movable carrier 322 of the blade carrier 32 is movably disposed in the movable accommodating cavity 3210 of the fixed carrier 321 .

[0051] The driving mechanism 33 includes a piezoelectric ceramic component 331 and a guide 332, wherein the guide 332 is drivably arranged between the piezoelectric ceramic component 331 and the movable carrier 322 of the blade carrier 32, and the piezoelectric ceramic component 331 drives the movable carrier 322 of the blade carrier 32 to move through the guide 332. The guide 332 is fixedly connected to the movable carrier 322 of the blade carrier 32, and the piezoelectric ceramic component 331 pushes the movable carrier to rotate through the guide 332, and the movable carrier 322 drives the blade unit 311 to open and close.

[0052] It can be understood that the piezoelectric ceramic component 331 and the guide 332 of the driving mechanism 33 are arranged in the movable accommodation cavity 3210 of the blade carrier 32, that is, the driving mechanism 33 is arranged between the movable carrier 322 of the blade carrier 32 and the fixed carrier 31, and the movable carrier 322 is driven by the driving mechanism 33 to rotate in the movable accommodation cavity 3210 of the fixed carrier 31. The driving mechanism 33 is retained in the movable accommodation cavity 3210, so the lateral size of the variable aperture 30 is not increased, that is, the volume of the driving mechanism 33 is greatly reduced, which is conducive to miniaturization and thinness of the overall structure.

[0053] The guide 332 of the driving mechanism 33 is disposed below the movable carrier 322, and the piezoelectric ceramic component 331 and the guide 332 of the driving mechanism 33 are arranged along the circumferential direction of the movable carrier 322, wherein the driving force generated between the piezoelectric ceramic component 331 and the guide 332 acts on the movable carrier 322 and drives the movable carrier 322 to rotate along its circumferential direction.

[0054] The piezoelectric ceramic component 331 of the driving mechanism 33 further includes two piezoelectric ceramic units 3311 and a resonant body 3312 disposed between the two piezoelectric ceramic units 3311, wherein the two piezoelectric ceramic units 3311 are disposed symmetrically with respect to the resonant body 3312. One end of the resonant body 3312 is connected to the guide 332 of the driving mechanism 33.

[0055] It should be noted that when the piezoelectric ceramic component 331 of the driving mechanism 33 is turned on and an alternating electric field is applied, the alternating electric field of the piezoelectric ceramic unit 3311 is applied to the piezoelectric crystal, which can excite forced vibration in the piezoelectric crystal through the inversion effect. When the frequency of the external electric field is consistent with the natural vibration frequency of the piezoelectric body of the piezoelectric ceramic unit 3311, the piezoelectric body enters a mechanical resonance state and becomes a piezoelectric vibrator; at this time, the crystal vibrates in a natural mode (standing wave) (the piezoelectric ceramic is energized, and the current is close to the circuit frequency to produce resonant vibration).

[0056] It is worth mentioning that in the preferred embodiment of the present application, the piezoelectric ceramic unit 3311 of the piezoelectric ceramic component 331 is a resonant piezoelectric ceramic.

[0057] It is understandable that the resonant vibration caused by the piezoelectric ceramic of the resonant body acts as an exciting force to cause the resonant body to vibrate. Preferably, the resonant frequency of the piezoelectric ceramic unit 3311 is close to (resonates) a certain order natural frequency of the resonant body, so that it vibrates in this order mode. The resonant body 3312 drives the guide 332 to move. It should be noted that, generally speaking, when the drive mechanism 33 is electrically turned on, the resonant body 3312 of the drive mechanism 33 drives the guide 332 to push forward or pull backward, and the vibration mode of the resonant body 3312 is inconsistent, that is, the natural frequency is different, that is, the frequency of the current input to the piezoelectric ceramic is different.

[0058] Therefore, when it is necessary to control the opening or closing of the variable aperture, the piezoelectric ceramic component 331 of the driving mechanism 33 can be controlled to push forward or pull backward the guide 332 to move by controlling the current frequency of the piezoelectric ceramic component 331 of the driving mechanism 33, and then the movable carrier 322 drives the blade unit 311 to open or close.

[0059] The piezoelectric ceramic unit 3311 of the piezoelectric ceramic assembly 331 clamps the resonant body 3312, wherein the resonant body 3312 includes a transmission end 33121 and at least two tuning forks 33122 extending integrally from the transmission end 33121, wherein the tuning forks 33122 extend integrally inward from both sides of the transmission end 33121 to form a clamp with a gradually smaller opening, and the guide 332 is clamped in the clamp by the tuning forks 33122.

[0060] like Fig. 7A and Figure 7BAs shown, when the piezoelectric ceramic component 331 is electrically conducted at a specific current frequency, the piezoelectric ceramic unit 3311 of the piezoelectric ceramic component 331 and the resonant body 3312 vibrate at a vibration frequency F1, and the resonant body 3312 follows the piezoelectric ceramic unit 3311 to generate a forward biasing force, and the tuning fork 33122 of the resonant body 3312 clamps the guide 332 to move forward, that is, the tuning fork 33122 of the resonant body 3312 pushes the guide 332 to move forward. When the piezoelectric ceramic component 331 is electrically conducted at another specific current frequency, the piezoelectric ceramic unit 3311 of the piezoelectric ceramic component 331 and the resonant body 3312 vibrate at a vibration frequency F2, and the resonant body 3312 follows the piezoelectric ceramic unit 3311 to generate a backward supporting force, and the tuning fork 33122 of the resonant body 3312 clamps the guide 332 to move backward, that is, the tuning fork 33122 of the resonant body 3312 pulls the guide 332 to move backward.

[0061] The transmission end 33121 of the resonant body 3312 is clamped by the piezoelectric ceramic unit 3311. When the piezoelectric ceramic 3311 is electrically conductive, the piezoelectric ceramic unit 3311 resonates with the resonant body 3312, and the transmission end 33121 of the resonant body 3312 transmits vibration to the tuning fork 33122, wherein the tuning fork 33122 clamps the guide 332 to move in a specific direction. The ends of the tuning forks 33122 on both sides protrude outward from the transmission end 33121 and extend inward as a whole, thereby forming a clamping opening with a gradually smaller opening, wherein the ends of the tuning forks 33122 clamp the guide 332 and convert the vibration into a force that drives the guide 332 to move forward or backward.

[0062] The variable aperture 30 further includes a circuit board 34 , wherein the circuit board 34 is electrically connected to the driving mechanism 33 , and the circuit board 34 can electrically conduct the piezoelectric ceramic component 331 of the driving mechanism 33 .

[0063] The circuit board 34 is disposed below the blade carrier 32, and the driving mechanism 33 is disposed on the circuit board 34, and the circuit board 34 supports the driving mechanism 33. The circuit board 34 has a bearing surface 341, and the piezoelectric ceramic component 331 and the guide 332 of the driving mechanism 33 are disposed on the bearing surface 341 of the circuit board 34.

[0064] It is worth mentioning that in this preferred embodiment of the present application, the guide 332 is supported between the circuit board 34 and the movable carrier 322, and the guide 332 supports the movable carrier 322 in a suspended manner in the movable accommodation space 3210 of the fixed carrier 321. It can be understood that the guide 332 passes through the fixed carrier 321 and is supported between the circuit board 34 and the movable carrier 322, which can further reduce the size of the variable aperture 30 in the thickness direction, which is conducive to thinness.

[0065] The circuit board 34 further includes a circuit board body 342 and a circuit board connection unit 343, wherein the circuit board body 342 is disposed below the fixed carrier 321 and connected to the guide 332 and the piezoelectric ceramic component 331, and the circuit board connection unit 343 is electrically connected to the circuit board body 342, and is used to connect the circuit board 34 to the photosensitive component 10 of the camera module. Preferably, in this preferred embodiment of the present application, the circuit board body 342 of the circuit board 34 is attached to the lower end surface of the fixed carrier 321.

[0066] The fixed carrier 321 includes a carrier base 3211 and an inner annular wall 3212 and an outer annular wall 3213 extending integrally from the carrier base 3211, wherein the inner annular wall 3212 is located on the inner side of the carrier base 3211, and the outer annular wall 3213 is located on the outer side of the carrier base 3211, and the carrier base 3211, the inner annular wall and the outer annular wall 3213 of the fixed carrier 321 jointly form the movable accommodating space 301.

[0067] The carrier base 3211, the inner annular wall 3212 and the outer annular wall 3213 of the fixed carrier 321 form an annular groove, and the movable carrier 322 is driven by the driving mechanism 33 to rotate in the annular groove of the fixed carrier 321. The carrier base 3211, the inner annular wall 3212 and the outer annular wall 3213 of the fixed carrier 321 restrict the movable carrier 322 from rotating in a specific direction. An annular hole is formed on the inner side of the inner annular wall 3212 of the fixed carrier 321, wherein the annular through hole corresponds to the light through hole of the variable aperture 30.

[0068] The fixed carrier 321 is further provided with at least one penetration groove 3214, wherein the at least one penetration groove 3214 is formed in the carrier base 3211 of the fixed carrier 321, and the penetration groove 3214 passes through the upper and lower surfaces of the carrier base 3211, and the driving mechanism 33 is arranged in the penetration groove 3214 of the fixed carrier 321, and the driving mechanism 33 passes through the penetration groove 3214 of the fixed carrier 321 and is supported on the lower end surface of the circuit board 34 and the movable carrier 322.

[0069] It is worth mentioning that in this preferred embodiment of the present application, the size of the penetration groove 3214 along the circumferential direction is larger than the size of the driving mechanism 33. When the piezoelectric ceramic component 331 of the driving mechanism 33 is electrically conducted, the guide 332 of the driving mechanism 33 can move back and forth in the penetration groove 3214 without being blocked.

[0070] The variable aperture 30 further includes at least one supporting member 35 , wherein the supporting member 35 is disposed between the movable carrier 322 and the circuit board 34 , and is used to support the movable carrier 322 to rotate in the movable accommodating space 301 .

[0071] It is worth mentioning that the support member 35 passes through the carrier base 3211 of the fixed carrier 321. The fixed carrier 321 is further provided with at least one through hole 3215, wherein the through hole 3215 passes through the carrier base 3211, and the support member 35 passes through the through hole 3215 of the fixed carrier 321 to be supported between the circuit board 35 and the movable carrier 322.

[0072] The support member 35 and the guide 332 extend from the upper end surface of the circuit board 35 to the lower surface of the movable carrier 322, that is, the support member 35 and the guide 332 penetrate the carrier base 3211 of the fixed carrier 321, and the movable carrier 322 is supported by the support member 35 and the guide 332 in the movable accommodation space 301 of the fixed carrier 321. It can be understood that the height of the support member 35 and the guide 332 does not exceed the height of the fixed carrier 321, which will not increase the difficulty of manufacturing and processing, and will not increase the overall height of the variable aperture, which is conducive to overall miniaturization and thinness.

[0073] The piezoelectric ceramic component 331 and the guide 332 of the driving mechanism 33 are fixed on the upper surface of the circuit board 35, and the driving mechanism 33 as a whole is maintained in the movable accommodation space 301 formed by the fixed carrier 321. It does not require a complex mechanical structure, can achieve miniaturization of the overall structure, and the driving structure has good stability.

[0074] It is worth mentioning that, in this preferred embodiment of the present application, the guide 332 and the support member 35 are evenly distributed between the circuit board 34 and the movable carrier 322. Preferably, in this preferred embodiment of the present application, the number of the support members 35 of the variable aperture 30 is two or more, wherein the support member 35 and the guide 332 form a triangular support structure to improve stability.

[0075] The fixed carrier 321 further includes a plurality of blade support columns 3216 , and the fixed end 3112 of the blade unit 311 is disposed on the blade support column 3216 of the fixed carrier 321 . When the blade unit 311 moves with the movable carrier 322 , the fixed end 3112 of the blade unit 311 can rotate along the blade support column 3216 of the fixed carrier 321 .

[0076] Preferably, the blade support column 3216 is disposed on the outer annular wall 3213 of the fixed carrier 321 , and the blade support column 3216 extends upward from the outer annular wall 3213 as a whole.

[0077] The movable carrier 322 includes a carrier ring 3221 and a plurality of blade transmission rods 3222 formed on the carrier ring 3221, wherein the blade transmission rods 3222 of the movable carrier 322 are connected to the blade unit 311, and when the driving structure 33 drives the movable carrier 322 to move, the blade transmission rods 3222 of the movable carrier 322 drive the movable end 3111 of the blade unit 311 to rotate along the circumferential direction of the carrier ring 3221.

[0078] The carrier ring 3221 of the movable carrier 322 is an annular structure, and the blade transmission rod 3222 protrudes and extends upward from the carrier ring 3221 .

[0079] The fixed carrier 321 further includes a plurality of bosses 3217, wherein the bosses 3217 integrally extend inward from the outer ring wall 3213, and a limiting groove 3218 is formed between any two adjacent bosses 3217. The movable carrier 322 further includes a plurality of limiting protrusions 3223, wherein the limiting protrusions 3223 integrally extend outward from the carrier ring 3221 of the movable carrier 322, and the limiting protrusions 3223 of the movable carrier 322 are retained in the limiting grooves 3218 of the fixed carrier 321. The bosses 3217 of the fixed carrier 321 and the limiting protrusions 3223 of the movable carrier 322 form a mutually restricting and limiting effect, and the bosses 3217 of the fixed carrier 321 limit the moving stroke of the limiting protrusions 3223 of the movable carrier 322 to prevent excessive rotation.

[0080] That is to say, the boss 3217 of the fixed carrier 321 blocks the movement of the limiting protrusion 3223 of the movable carrier 322 on the inner side of the outer ring wall 3213, and the movement stroke of the blade unit 311 is adjusted by the mutual restriction of the boss 3217 and the limiting protrusion 3223.

[0081] It should be noted that the size of the limiting groove 3218 of the fixed carrier 321 along the circumferential direction is greater than the size of the limiting protrusion 3223 of the movable carrier 322 along the circumferential direction, and a gap that can be adjusted and moved is provided on at least one side of the limiting protrusion 3223 in the limiting groove 3218.

[0082] Preferably, in this selected embodiment of the present application, the blade support column 3216 of the fixed carrier 321 is formed above the boss 3217. More preferably, the limiting protrusion 3223 of the movable carrier 322 is fan-shaped.

[0083] The variable aperture 30 further includes a cover plate 36, wherein the cover plate 36 is disposed on the upper end of the fixed carrier 321 of the blade carrier 32, and the cover plate 36 is disposed above the blade assembly 31 to protect the blade unit of the blade assembly 31. The cover plate 36 is provided with a central through hole 361, wherein the central axis of the central through hole 361 is parallel to or coincides with the central axis of the light hole. The aperture of the central through hole 361 of the cover plate 36 is larger than the maximum aperture of the blade assembly 31 when it is opened.

[0084] The cover plate 36 covers the top of the blade assembly 31 to limit the movement direction of the blade assembly 31 and prevent the blade assembly 31 from tilting upward.

[0085] The cover plate 36 is further provided with a plurality of limiting holes 362 and a plurality of positioning holes 363, wherein the limiting holes 362 of the cover plate 36 correspond to the limiting protrusions 3223 of the movable carrier 322, and the limiting holes 362 are long strip holes, and their circumferential dimensions are larger than the dimensions of the limiting protrusions 3223, allowing the limiting protrusions 3223 to move within the limiting holes 362. The positioning holes 363 of the cover plate 36 correspond to the blade support columns 3216 of the fixed carrier 321, wherein the blade support columns 3216 can extend upward along the positioning holes 363 of the cover plate 36, facilitating the positioning and installation of the cover plate 36 and the blade assembly 31.

[0086] The circuit board 34 of the variable aperture 30 is connected to the circuit board of the photosensitive component 10 of the camera module. When the amount of light entering the camera module needs to be adjusted during shooting, the driving mechanism 33 of the variable aperture 30 is electrically turned on, and then the driving mechanism 33 drives the blade assembly 10 to rotate, adjust the aperture size, and then adjust the amount of light entering the camera module.

[0087] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0088] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications all belong to the protection scope of the present invention.

Claims

1. Variable aperture, characterized in that: include: A blade assembly, wherein the blade assembly comprises a plurality of blade units, the blade units of the blade assembly are sequentially arranged in a ring shape along the circumferential direction of the blade carrier, and form a light-through hole with an adjustable aperture size; a blade carrier, the blade carrier comprising a fixed carrier and a movable carrier, the blade unit of the blade assembly is movably arranged on the fixed carrier and connected to the movable carrier, the fixed carrier is provided with a movable accommodating cavity, and the movable carrier is movably arranged in the movable accommodating cavity of the fixed carrier; and A driving mechanism, wherein the driving mechanism is arranged in the movable accommodating cavity of the fixed carrier and is connected to the movable carrier, the driving mechanism can drive the blade carrier to move in the movable accommodating cavity, and the movable carrier drives each blade unit of the blade assembly to rotate to adjust the size of the light-through hole.

2. The variable aperture according to claim 1, wherein the blade unit further comprises a movable end and a fixed end extending integrally from the movable end, wherein the fixed end of the blade unit is disposed on the blade carrier, and the blade carrier is connected to the movable end of the blade unit, and the blade carrier can drive the movable end of the blade unit to rotate around the fixed end.

3. The variable aperture according to claim 2, wherein the driving mechanism comprises a piezoelectric ceramic component and a guide, wherein the guide is traversably arranged between the piezoelectric ceramic component and the movable carrier of the blade carrier, and the piezoelectric ceramic component drives the movable carrier of the blade carrier to move via the guide.

4. The variable aperture according to claim 3, wherein the guide of the driving mechanism is disposed below the movable carrier, the piezoelectric ceramic component of the driving mechanism and the guide are arranged along the circumferential direction of the movable carrier, and the driving force generated between the piezoelectric ceramic component and the guide acts on the movable carrier.

5. The variable aperture according to claim 3, wherein the piezoelectric ceramic assembly further comprises two piezoelectric ceramic units and a resonant body arranged between the two piezoelectric ceramic units, wherein the two piezoelectric ceramic units are symmetrically arranged up and down relative to the resonant body, and one end of the resonant body is connected to the guide of the driving mechanism. 6 . The variable aperture diaphragm according to claim 5 , wherein the resonance frequency of the piezoelectric ceramic unit resonates with a certain order natural frequency of the resonance body, so that it vibrates in the mode of the certain order.

7. The variable aperture according to claim 5, wherein the resonator comprises a transmission end and at least two tuning forks extending integrally from the transmission end, wherein the tuning forks extend integrally inward from both sides of the transmission end to form a clamping opening with a gradually smaller opening, and the guide is clamped in the clamping opening by the tuning forks.

8. The variable aperture according to claim 7, wherein the transmission end of the resonant body is clamped by the piezoelectric ceramic unit, and when the piezoelectric ceramic assembly is electrically conducted, the piezoelectric ceramic unit resonates with the resonant body, and the transmission end of the resonant body transmits vibration to the tuning fork, wherein the tuning fork clamps the guide to move in a specific direction.

9. The variable aperture according to claim 7, further comprising a circuit board, wherein the circuit board is electrically connected to the driving mechanism, and the circuit board can electrically conduct the piezoelectric ceramic component of the driving mechanism.

10. The variable aperture according to claim 9, wherein the circuit board is disposed below the blade carrier, and the driving mechanism is disposed on the circuit board, and the circuit board supports the driving mechanism. The circuit board has a bearing surface, and the piezoelectric ceramic component and the guide of the driving mechanism are disposed on the bearing surface of the circuit board. 11 . The variable aperture diaphragm according to claim 10 , wherein the guide is supported between the circuit board and the movable carrier, and the guide supports the movable carrier in the movable accommodation space of the fixed carrier in a suspended manner.

12. The variable aperture according to claim 11, wherein the fixed carrier comprises a carrier base and an inner annular wall and an outer annular wall extending integrally from the carrier base, the fixed carrier is further provided with at least one penetration groove, wherein the at least one penetration groove is formed in the carrier base of the fixed carrier, and the penetration groove passes through the upper and lower surfaces of the carrier base, and the driving mechanism is disposed in the penetration groove of the fixed carrier. 13 . The variable aperture according to claim 10 , further comprising at least one supporting member, wherein the supporting member is disposed between the movable carrier and the circuit board, and is used to support the movable carrier to rotate in the movable accommodating space.

14. The variable aperture according to claim 13, wherein the fixed carrier further comprises a plurality of blade support columns, the fixed end of the blade unit is arranged on the blade support column of the fixed carrier, the blade support column is arranged on the outer annular wall of the fixed carrier, and the blade support column extends upward integrally from the outer annular wall. 15 . The iris diaphragm according to claim 14 , wherein the movable carrier comprises a carrier ring and a plurality of blade transmission levers formed on the carrier ring, wherein the blade transmission levers of the movable carrier are connected to the blade units.

16. A camera module, characterized in that: include: Photosensitive components; Lens assembly; as well as A variable aperture as described in any one of claims 1 to 15, wherein the lens assembly and the lens assembly are arranged at the front end of the light incident direction of the photosensitive component along the photosensitive path of the photosensitive component, and the variable aperture has a light hole with an adjustable size for adjusting the amount of light entering the photosensitive component.

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