Variable aperture and camera module with variable aperture

Abstract

The application provides a variable aperture and a camera module with the variable aperture, wherein the variable aperture comprises a blade assembly, a blade carrier and a driving mechanism, wherein the blade assembly comprises a plurality of blade units, the blade units of the blade assembly are arranged in a ring shape along the circumferential direction of the blade carrier, and form a light passing hole with adjustable aperture size; 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 accommodating cavity, and the movable carrier is movably arranged in the movable accommodating 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 application relates to the field of camera technology, in particular to a variable aperture and a camera module with the variable aperture. BACKGROUND

[0002] Apertures are commonly used in single-lens reflex cameras to adjust the size of the aperture through which light passes, and in conjunction with the shutter of the camera module, the amount of light that enters can be determined, which can affect the depth of field and image quality. The aperture that can adjust the amount of light entering includes a plurality of blades, which are arranged in a ring to form an aperture for light to pass through. Driving the movement of the plurality of blades can adjust the size of the aperture, thereby achieving the purpose of changing the amount of light entering.

[0003] With the development of technology, electronic devices such as mobile phones and tablet computers have increasingly high requirements for camera functions in order to achieve camera effects close to single-lens reflex cameras. However, the overall structure of the existing aperture applied to single-lens reflex devices is too large to be applied to such electronic devices. With the increasing demand, the camera module of mobile phones, tablet computers and other electronic devices is gradually miniaturized and thinned. Therefore, when adding a variable aperture to the camera module, not only the overall size of the camera module needs to be considered, but also factors such as the stability and reliability of the aperture operation need to be considered.

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

[0005] One of the main advantages of the present application is to provide a variable aperture and a camera module with the variable aperture, wherein the variable aperture is driven by a piezoelectric ceramic to move the blade assembly, thereby adjusting the size of the aperture hole.

[0006] Another advantage of the present application is to provide a variable aperture and a camera module with the variable aperture, wherein the piezoelectric ceramic is arranged below the blade assembly, which occupies a small volume and does not increase the size of the camera module in the width direction, which is beneficial to the miniaturization and thinning of the camera module as a whole.

[0007] According to one aspect of the present application, a variable aperture of the present application capable of achieving the aforementioned objects and other objects and advantages includes:

[0008] a blade assembly, wherein the blade assembly includes a plurality of blade units, the blade units of the blade assembly are arranged in a ring in sequence along the circumferential direction of the blade carrier, and form the aperture with adjustable aperture size.

[0009] a blade carrier, the blade units of the blade assembly being movably arranged in the fixed carrier and connected with the movable carrier, the fixed carrier being provided with a movable accommodating cavity, the movable carrier being movably arranged in the movable accommodating cavity of the fixed carrier; and

[0010] a driving mechanism, the driving mechanism being arranged in the movable accommodating cavity of the fixed carrier and connected with the movable carrier, the driving mechanism being capable of driving the blade carrier to move in the movable accommodating cavity, the movable carrier driving each blade unit of the blade assembly to rotate so as to adjust the size of the light passage.

[0011] According to an embodiment of the present application, the blade unit further comprises a movable end and a fixed end integrally extending from the movable end, the fixed end of the blade unit being arranged in the blade carrier, and the blade carrier being connected with the movable end of the blade unit, the blade carrier being capable of driving the movable end of the blade unit to rotate around the fixed end.

[0012] According to an embodiment of the present application, the driving mechanism comprises a piezoelectric ceramic assembly and a guide, the guide being drivingly arranged between the piezoelectric ceramic assembly and the movable carrier of the blade carrier, the piezoelectric ceramic assembly driving the movable carrier of the blade carrier to move through the guide.

[0013] According to an embodiment of the present application, the guide of the driving mechanism is arranged below the movable carrier, the piezoelectric ceramic assembly and the guide of the driving mechanism being arranged along the circumferential direction of the movable carrier, wherein the driving force generated between the piezoelectric ceramic assembly and the guide acts on the movable carrier.

[0014] According to an embodiment of the present application, the piezoelectric ceramic assembly further comprises two piezoelectric ceramic units and a resonator arranged between the two piezoelectric ceramic units, the two piezoelectric ceramic units being symmetrically arranged above and below the resonator, one end of the resonator being connected with the guide of the driving mechanism.

[0015] According to an embodiment of the present application, the resonant frequency of the piezoelectric ceramic unit is resonant with the natural frequency of a certain order of the resonator, so that the piezoelectric ceramic unit vibrates in the order mode.

[0016] According to an embodiment of the present application, the resonator comprises a driving end and at least two tuning forks integrally extending from the driving end, the tuning forks integrally extending inwardly from both sides of the driving end to form a clamping opening with gradually decreasing opening size, and the guide being clamped in the clamping opening by the tuning forks.

[0017] According to one embodiment of the present application, the driving end of the resonator is clamped by the piezoelectric ceramic unit, when the piezoelectric ceramic assembly is electrically conducted, the piezoelectric ceramic unit resonates with the resonator, the driving end of the resonator conducts vibration to the tuning fork, and the tuning fork clamps the guide to move in a specific direction.

[0018] According to one embodiment of the present application, further comprising a circuit board, wherein the circuit board is electrically connected with the driving mechanism, and the circuit board can electrically conduct the piezoelectric ceramic assembly of the driving mechanism.

[0019] According to one embodiment of the present application, 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 assembly of the driving mechanism and the guide are arranged on the bearing surface of the circuit board.

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

[0021] According to one embodiment of the present application, the fixed carrier includes a carrier base, an inner ring wall and an outer ring wall integrally extended from the carrier base, and the fixed carrier is further provided with at least one penetrating slot, wherein the at least one penetrating slot is formed in the carrier base of the fixed carrier, and the penetrating slot penetrates the upper and lower surfaces of the carrier base, and the driving mechanism is arranged in the penetrating slot of the fixed carrier.

[0022] According to one embodiment of the present application, further comprising at least one support, wherein the support is arranged between the movable carrier and the circuit board, and is used to support the movable carrier to rotate in the movable accommodation space.

[0023] According to one embodiment of the present application, 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 ring wall of the fixed carrier, and the blade support column integrally extends upward from the outer ring wall.

[0024] According to one embodiment of the present application, the movable carrier includes a carrier ring and a plurality of blade transmission rods formed in the carrier ring, wherein the blade transmission rod of the movable carrier is connected with the blade unit.

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

[0026] a photosensitive component;

[0027] a lens assembly; and

[0028] The variable aperture as claimed in any one of the 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 an adjustable light passing hole for adjusting the amount of light entering the photosensitive component.

[0029] Further purposes and advantages of the present application will be fully understood from the following description and drawings.

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

[0031] The technical solutions of the present application will be further described in detail below in combination with the drawings and examples. In the drawings, the same reference signs are used to represent the same components unless otherwise specified. Among them:

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

[0033] Figure 2 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 application.

[0034] Figure 3 is an exploded view of the variable aperture of the camera module according to the first preferred embodiment of the present application.

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

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

[0037] Figure 6 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 application.

[0038] Figure 7A and Figure 7B 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 application.

[0039] Figure 8 2 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. Their size and structure 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, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the respective drawings. They are relative concepts and may vary accordingly depending on the position or usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0042] Refer to the accompanying 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 assembly 20 arranged in the light sensing path of the photosensitive component 10, and a variable aperture 30, wherein the variable aperture 30 is located at the front end of the lens assembly 20 in the light incident direction, and the variable aperture 30 has an adjustable light hole 301 so as to adjust the amount of light entering the lens assembly 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 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 circumference of the blade carrier 32, and form the light-through hole 301 with an adjustable aperture size. It is worth noting 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 one specific example of the present application, the number of the blade units 311 of the blade assembly 31 is six. It can be appreciated that in another alternative embodiment of the present application, the number of the blade units 311 can also be five, seven, eight or any other number, which is not limited in the present application.

[0046] The blade unit 311 of the blade assembly 31 further comprises a movable end 3111 and a fixed end 3112 integrally extended from the movable end 3111, wherein the fixed end 3112 of the blade unit 311 is arranged on the blade carrier 32, and the blade carrier 32 is connected with 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, so as to change the aperture size of the light passing hole 301 formed by the blade assembly 31.

[0047] The blade carrier 32 comprises a fixed carrier 321 and a movable carrier 322, wherein the movable end 3111 of the blade unit 311 is connected with the movable carrier 322 of the blade carrier 32, the fixed end 3112 of the blade unit 311 is connected with the fixed carrier 321 of the blade carrier 32, and the movable carrier 322 of the blade carrier 32 is connected with 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 each of the blade units 311 connected therewith 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 on the fixed carrier 321 of the blade carrier 32, and 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 passing 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 in a specific direction (clockwise or counterclockwise) on the inner side of the fixed carrier 321, and then drive each of the blade units 311 connected therewith to move by the movable carrier 322, so as to adjust the aperture size of the light passing hole 301.

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

[0051] The driving mechanism 33 comprises a piezoelectric ceramic assembly 331 and a guide 332, the guide 332 is drivingly arranged between the piezoelectric ceramic assembly 331 and the movable carrier 322 of the blade carrier 32, and the piezoelectric ceramic assembly 331 drives the movable carrier 322 of the blade carrier 32 to move through the guide 332. The guide 332 is fixedly connected with the movable carrier 322 of the blade carrier 32, the piezoelectric ceramic assembly 331 drives the movable carrier 322 to rotate through the guide 332, and the movable carrier 322 drives the opening and closing of the blade unit 311.

[0052] It can be understood that the piezoelectric ceramic assembly 331 and the guide 332 of the driving mechanism 33 are arranged in the movable accommodating cavity 3210 of the blade carrier 32, that is, the driving mechanism 33 is arranged between the movable carrier 322 and the fixed carrier 321 of the blade carrier 32, and the movable carrier 322 is driven to rotate in the movable accommodating cavity 3210 of the fixed carrier 321 by the driving mechanism 33. The driving mechanism 33 is kept in the movable accommodating cavity 3210, so as not to increase the transverse size of the variable aperture 30, that is, the volume of the driving mechanism 33 is greatly reduced, which is conducive to realizing the miniaturization and lightness of the overall structure.

[0053] The guide 332 of the driving mechanism 33 is arranged below the movable carrier 322, and the piezoelectric ceramic assembly 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 assembly 331 and the guide 332 acts on the movable carrier 322 and drives the movable carrier 322 to rotate along the circumferential direction thereof.

[0054] The piezoelectric ceramic assembly 331 of the driving mechanism 33 further comprises two piezoelectric ceramic units 3311 and a resonance body 3312 arranged between the two piezoelectric ceramic units 3311, and the two piezoelectric ceramic units 3311 are symmetrically arranged above and below the resonance body 3312. One end of the resonance body 3312 is connected with the guide 332 of the driving mechanism 33.

[0055] It is to be noted that when the piezoelectric ceramic assembly 331 of the driving mechanism 33 is turned on and an alternating electric field is applied, the piezoelectric ceramic unit 3311 applies an alternating electric field to the piezoelectric crystal, and thus a forced vibration is excited in the piezoelectric crystal by the inverse piezoelectric effect. When the frequency of the external electric field is consistent with the vibration inherent 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 the inherent mode (standing wave) (the piezoelectric ceramic is powered on, and the current and the circuit frequency are close to produce a resonance vibration).

[0056] It is to be noted that in the preferred embodiment of the present application, the piezoelectric ceramic unit 3311 of the piezoelectric ceramic assembly 331 is a resonator piezoelectric ceramic.

[0057] It can be understood that the resonance vibration caused by the resonator piezoelectric ceramic serves as an exciting force to cause the resonator to vibrate. Preferably, the resonance frequency of the piezoelectric ceramic unit 3311 is close to (resonance) the inherent frequency of a certain order of the resonator, so that it vibrates in the order mode. The resonator 3312 drives the guide 332 to move. It is to be noted that in general, when the driving mechanism 33 is electrically turned on, the resonator 3312 of the driving mechanism 33 drives the guide 332 to push forward or pull backward, and the vibration modes of the resonator 3312 are inconsistent, i.e. the inherent frequencies are different, i.e. the current frequency input to the piezoelectric ceramic is different.

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

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

[0060] As Figure 7A and Figure 7BAs shown, when the piezoelectric ceramic assembly 331 is electrically conducted at a specific current frequency, the piezoelectric ceramic unit 3311 of the piezoelectric ceramic assembly 331 and the resonator body 3312 generate vibration at vibration frequency F1, the resonator body 3312 follows the piezoelectric ceramic unit 3311 to generate a forward holding force, the sound fork 33122 of the resonator body 3312 clamps the guide 332 to move forward, that is, the sound fork 33122 of the resonator body 3312 pushes the guide 332 to move forward. When the piezoelectric ceramic assembly 331 is electrically conducted at another specific current frequency, the piezoelectric ceramic unit 3311 of the piezoelectric ceramic assembly 331 and the resonator body 3312 generate vibration at vibration frequency F2, the resonator body 3312 follows the piezoelectric ceramic unit 3311 to generate a backward holding force, the sound fork 33122 of the resonator body 3312 clamps the guide 332 to move backward, that is, the sound fork 33122 of the resonator body 3312 pulls the guide 332 to move backward.

[0061] The transmission end 33121 of the resonator body 3312 is clamped by the piezoelectric ceramic unit 3311, when the piezoelectric ceramic 3311 is electrically conducted, the piezoelectric ceramic unit 3311 and the resonator body 3312 generate resonance, the transmission end 33121 of the resonator body 3312 transmits vibration to the sound fork 33122, wherein the sound fork 33122 clamps the guide 332 to move in a specific direction. The end of the sound fork 33122 on both sides protrudes outward from the transmission end 33121 and integrally extends inward, thereby forming a clamping opening with gradually decreasing opening, wherein the end of the sound fork 33122 clamps the guide 332 and converts vibration into an acting force to drive the guide 332 to move forward or backward.

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

[0063] The circuit board 34 is arranged below the blade carrier 32, and the driving mechanism 33 is arranged 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 assembly 331 and the guide 332 of the driving mechanism 33 are arranged on the bearing surface 341 of the circuit board 34.

[0064] It is worth mentioning that in the 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 active 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, facilitating light and thin.

[0065] The circuit board 34 further comprises a circuit board body 342 and a circuit board connecting unit 343, wherein the circuit board body 342 is arranged below the fixed carrier 321 and connected with the guide 332 and the piezoelectric ceramic assembly 331, and the circuit board connecting unit 343 is electrically connected with the circuit board body 342 and used for connecting the circuit board 34 with the photosensitive assembly 10 of the camera module. Preferably, in the 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 comprises a carrier base 3211, an inner ring wall 3212 and an outer ring wall 3213 integrally extended from the carrier base 3211, wherein the inner ring wall 3212 is located on the inner side of the carrier base 3211, the outer ring wall 3213 is located on the outer side of the carrier base 3211, and the carrier base 3211, the inner ring wall and the outer ring wall 3213 of the fixed carrier 321 collectively form the active accommodation space 301.

[0067] The carrier base 3211, the inner ring wall 3212 and the outer ring wall 3213 of the fixed carrier 321 form an annular groove, and the movable carrier 322 is driven to rotate in the annular groove of the fixed carrier 321 by the driving mechanism 33. The carrier base 3211, the inner ring wall 3212 and the outer ring wall 3213 of the fixed carrier 321 limit the rotation of the movable carrier 322 in a specific direction. The inner side of the inner ring wall 3212 of the fixed carrier 321 forms a circular ring hole, wherein the circular ring 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 slot 3214, wherein the at least one penetration slot 3214 is formed in the carrier base 3211 of the fixed carrier 321, and the penetration slot 3214 penetrates the upper and lower surfaces of the carrier base 3211, the driving mechanism 33 is arranged in the penetration slot 3214 of the fixed carrier 321, and the driving mechanism 33 is supported on the lower end surface of the movable carrier 322 through the penetration slot 3214 of the fixed carrier 321 and the circuit board 34.

[0069] It is worth mentioning that, in this preferred embodiment of the present application, the size of the penetration slot 3214 in the circumferential direction is greater than the size of the driving mechanism 33, and when the piezoelectric ceramic assembly 331 of the driving mechanism 33 is electrically conducted, the guide 332 of the driving mechanism 33 can reciprocally move in the penetration slot 3214 without being blocked.

[0070] The variable aperture 30 further comprises at least one support 35, wherein the support 35 is arranged between the movable carrier 322 and the circuit board 34 for supporting the rotation of the movable carrier 322 in the movable accommodation space 301.

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

[0072] The support 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 35 and the guide 332 penetrate the carrier base 3211 of the fixed carrier 321, and the movable carrier 322 is supported in the movable accommodation space 301 of the fixed carrier 321 by the support 35 and the guide 332. It can be understood that the height of the support 35 and the guide 332 does not exceed the height of the fixed carrier 321, does not increase the manufacturing and processing difficulty, and does not increase the overall height of the variable aperture, which is beneficial to the overall miniaturization and lightness.

[0073] The piezoelectric ceramic assembly 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 is held in the movable accommodation space 301 formed by the fixed carrier 321 as a whole, which does not need a complex mechanical structure, can realize miniaturization of the overall structure, and has good stability of the driving structure.

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

[0075] The fixed carrier 321 further comprises a plurality of blade support columns 3216, and the fixed end 3112 of the blade unit 311 is arranged 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 arranged on the outer ring wall 3213 of the fixed carrier 321, and the blade support column 3216 extends upward from the outer ring wall 3213 integrally.

[0077] The movable carrier 322 comprises a carrier ring 3221 and a plurality of blade transmission rods 3222 formed on the carrier ring 3221, wherein the blade transmission rod 3222 of the movable carrier 322 is connected with the blade unit 311. When the driving mechanism 33 drives the movable carrier 322 to move, the blade transmission rod 3222 of the movable carrier 322 drives 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 has a ring structure, and the blade transmission rod 3222 protrudes upward from the carrier ring 3221.

[0079] The fixed carrier 321 further comprises a plurality of protrusions 3217, wherein the protrusions 3217 integrally extend inwardly from the outer ring wall 3213, and a limiting slot 3218 is formed between any two adjacent protrusions 3217. The movable carrier 322 further comprises a plurality of limiting protrusions 3223, wherein the limiting protrusions 3223 integrally extend outwardly 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 slots 3218 of the fixed carrier 321. The protrusions 3217 of the fixed carrier 321 and the limiting protrusions 3223 of the movable carrier 322 form a mutual restriction and limitation effect, and the protrusions 3217 of the fixed carrier 321 limit the movement stroke of the limiting protrusions 3223 of the movable carrier 322, preventing excessive rotation.

[0080] That is, the protrusions 3217 of the fixed carrier 321 block the movement of the limiting protrusions 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 protrusions 3217 and the limiting protrusions 3223.

[0081] It should be noted that the size of the limiting slots 3218 of the fixed carrier 321 along the circumferential direction is greater than the size of the limiting protrusions 3223 of the movable carrier 322 along the circumferential direction, and at least one side of the limiting protrusions 3223 in the limiting slots 3218 is provided with a gap for adjustment and movement.

[0082] Preferably, in this optional embodiment of the present application, the blade support columns 3216 of the fixed carrier 321 are arranged above the protrusions 3217. More preferably, the limiting protrusions 3223 of the movable carrier 322 are fan-shaped.

[0083] The variable aperture 30 further comprises a cover plate 36, wherein the cover plate 36 is arranged at the upper end of the fixed carrier 321 of the blade carrier 32, and the cover plate 36 covers the blade assembly 31 for protecting the blade units 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 passing hole. The aperture of the central through hole 361 of the cover plate 36 is greater than the maximum aperture of the blade assembly 31 when it is opened.

[0084] The cover plate 36 covers the blade assembly 31, limiting the movement direction of the blade assembly 31, preventing the blade assembly 31 from being raised upward.

[0085] The cover plate 36 is further provided with a plurality of limiting holes 362 and a plurality of positioning holes 363. The limiting holes 362 of the cover plate 36 correspond to the limiting protrusions 3223 of the movable carrier 322. The limiting holes 362 are elongated holes with a circumferential dimension greater than that 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 posts 3216 of the fixed carrier 321. The blade support posts 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, adjusts the aperture size, and then adjusts the amount of light entering the camera module.

[0087] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

[0088] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications all fall within 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; a blade carrier, the blade carrier comprising a fixed carrier and a movable carrier, the blade unit of the blade assembly being movably disposed on the fixed carrier and connected to the movable carrier, the fixed carrier being provided with a movable accommodating cavity, and the movable carrier being movably disposed in the movable accommodating cavity of the fixed carrier; and A driving mechanism, wherein the driving mechanism is disposed 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; The driving mechanism includes a piezoelectric ceramic component and a guide, wherein the guide is drivably 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 through the guide, wherein 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 above and below relative to the resonant body, one end of the resonant body is connected to the guide of the driving mechanism, wherein the resonant body includes a transmission end and at least two tuning forks extending integrally from the transmission end, wherein the tuning forks extend 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 fork.

2. The variable aperture according to claim 1, wherein 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.

3. The variable aperture according to claim 1, wherein the guide of the driving mechanism is arranged 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. 4 . The variable aperture iris according to claim 1 , wherein the resonant frequency of the piezoelectric ceramic unit resonates with a certain order natural frequency of the resonator, so that the piezoelectric ceramic unit vibrates in the mode of the certain order.

5. The variable aperture according to claim 1 , wherein the transmission end of the resonant body is clamped by the piezoelectric ceramic unit, and when the piezoelectric ceramic assembly is electrically conductive, 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. 6 . The variable aperture according to claim 2 , 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.

7. The variable aperture according to claim 6, wherein the circuit board is arranged below the blade carrier, and the driving mechanism is arranged on the circuit board, 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. 8 . The variable aperture iris according to claim 7 , wherein the guide is supported between the circuit board and the movable carrier, and the guide supports the movable carrier in the movable accommodation cavity of the fixed carrier in a suspended manner.

9. The variable aperture according to claim 8, wherein the fixed carrier comprises a carrier base and an inner annular wall and an outer annular wall integrally extending from the carrier base, the fixed carrier is further provided with at least one penetrating groove, wherein the at least one penetrating groove is formed in the carrier base of the fixed carrier, and the penetrating groove passes through the upper and lower surfaces of the carrier base, and the driving mechanism is arranged in the penetrating groove of the fixed carrier. 10 . The variable aperture iris according to claim 7 , 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 cavity.

11. The variable aperture according to claim 9, wherein 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 ring wall of the fixed carrier, and the blade support column extends upward from the outer ring wall as a whole. 12 . The iris diaphragm according to claim 11 , 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.

13. A camera module, characterized in that: include: Photosensitive components; lens assembly; as well as The variable aperture as described in any one of claims 1 to 12, 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 light sensing 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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