Variable aperture device and camera module

Abstract

The present application provides a variable aperture device and a camera module, wherein the variable aperture device includes a housing, a driving mechanism, a transmission mechanism and a blade assembly, wherein the housing includes a base, the driving mechanism is arranged in the housing, the transmission mechanism is clamped between the driving mechanism and the base, the transmission mechanism is transmission-connected to the driving mechanism, the blade assembly is rotatably arranged on the base and transmission-connected to the transmission mechanism, wherein the driving mechanism drives the transmission mechanism, and the transmission mechanism drives the blade assembly to rotate to form a blade through hole with variable aperture.

Description

Technical Field

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

[0002] Aperture is a very important technical parameter in optical imaging technology. For example, in cameras and electronic equipment using camera modules, the amount of light entering the camera module can be adjusted by adjusting the area of ​​the aperture, so that the formed image has different brightness and depth of field. When the area of ​​the aperture is larger, the camera module has a greater amount of light entering, so that the formed image has high brightness and good background blur effect. When the area of ​​the aperture is smaller, the camera module has a smaller amount of light entering, so that the details in the formed image are very clear.

[0003] As an important component of the camera module, the characteristics of the aperture device can affect the function of the camera module. For example, portable devices such as smartphones and tablets are small in size and thin in thickness, and the space used to set up the camera module is also very small. Therefore, a fixed aperture device with a simple structure is usually provided. However, the aperture size of the fixed aperture device is fixed and cannot adapt well to different shooting scenes.

[0004] With the development of the market, portable devices that use fixed aperture devices to shoot images cannot meet the needs of users. Therefore, a variable aperture device that can change the aperture size of the camera module of the portable device is needed to meet the shooting requirements of the camera module in different shooting scenes. To meet this demand, a variable aperture device that can adjust the aperture size is desired. Summary of the Invention

[0005] A major advantage of the present application is that it provides a variable aperture device and a camera module, wherein the variable aperture device has an adjustable aperture, which can adjust the aperture value of the camera module by changing the size of its aperture, thereby achieving shooting with different aperture values.

[0006] Another advantage of the present application is that it provides a variable aperture device and a camera module, wherein the variable aperture device includes a housing, a blade assembly arranged on the housing, a transmission mechanism and a driving mechanism, wherein the blade assembly is traversably connected to the transmission mechanism, the transmission mechanism is clamped between the housing and the driving mechanism, and the driving mechanism drives the rotation of the transmission mechanism to adjust the size of the aperture.

[0007] Another advantage of the present application is that it provides a variable aperture device and a camera module, wherein the driving mechanism is a piezoelectric motor. The piezoelectric motor has large thrust and small size, which is suitable for realizing large-angle rotation of the transmission mechanism, and the self-locking function of the piezoelectric motor can also maintain the aperture size of the blade through hole when the power is not supplied.

[0008] Another advantage of the present application is that it provides a variable aperture device and a camera module, wherein the transmission mechanism is in contact with the driving mechanism, and the driving mechanism drives the transmission mechanism to rotate by friction transmission, thereby simplifying the transmission connection of the variable aperture device and facilitating the miniaturization of the variable aperture device.

[0009] Another advantage of the present application is that it provides a variable aperture device and a camera module, wherein the shell includes an upper cover and a corresponding base, wherein the upper cover and the base form a structural gap, and the blade assembly can extend out of the structural gap and form a blade aperture that can be gradually reduced, wherein the structural gap faces the inner side of the shell, which is conducive to reducing the entry of dust and external impurities into the interior of the shell, avoiding the impact on the variable aperture device, and improving the applicability of the variable aperture device.

[0010] Another advantage of the present application is that it provides a variable aperture device and a camera module, wherein the transmission mechanism is clamped between the driving mechanism and the base, and the pressure between the transmission mechanism and the driving mechanism can be adjusted through the upper cover and the base, and the structure is simple and the stability is high.

[0011] Another advantage of the present application is that it provides a variable aperture device and a camera module, wherein the variable aperture device has a simple structure and does not require expensive equipment and complex mechanical structures. Therefore, the present application provides an economical and reliable technical solution.

[0012] According to one aspect of the present application, a variable aperture device of the present application that can achieve the aforementioned objectives and other objectives and advantages includes:

[0013] a housing, the housing comprising a base;

[0014] a driving mechanism, the driving mechanism being disposed on the housing;

[0015] a transmission mechanism, the transmission mechanism being sandwiched between the driving mechanism and the base, the transmission mechanism being transmission-connected to the driving mechanism; and

[0016] The blade assembly is rotatably arranged on the base and is transmission-connected to the transmission mechanism, wherein the driving mechanism drives the transmission mechanism, and the transmission mechanism drives the blade assembly to form a blade through hole with variable aperture.

[0017] According to one embodiment of the present application, the driving mechanism includes a piezoelectric component and a driving circuit board electrically connected to the piezoelectric component, wherein the piezoelectric component is in contact with the transmission mechanism, and the piezoelectric component of the driving mechanism drives the transmission mechanism to move in a specific direction by friction force.

[0018] According to one embodiment of the present application, the piezoelectric component includes a piezoelectric element and a friction driving portion fixed to the bottom surface of the piezoelectric element, and the driving mechanism is in friction contact with the top surface of the transmission mechanism through the friction driving portion, wherein the piezoelectric element is an annular piezoelectric element.

[0019] According to one embodiment of the present application, the piezoelectric component includes a piezoelectric element and a friction driving portion fixed to the bottom surface of the piezoelectric element, and the driving mechanism is in friction contact with the top surface of the transmission mechanism through the friction driving portion, wherein the piezoelectric element is a linear piezoelectric element.

[0020] According to one embodiment of the present application, the transmission mechanism includes a transmission body and a friction member, wherein the friction member is fixedly connected to the transmission body, and the friction member is in contact with the driving mechanism.

[0021] According to one embodiment of the present application, the friction member covers the transmission body, the single-side width of the friction member is greater than the single-side width of the transmission body in the transverse direction, and the friction member extends inward from the upper side of the transmission body to the blade assembly.

[0022] According to one embodiment of the present application, the transmission mechanism further includes three or more driving teeth, wherein the driving teeth are integrally formed on the inner side of the transmission body, and wherein the blade assembly is meshedly connected with the three or more driving teeth of the transmission mechanism.

[0023] According to one embodiment of the present application, the blade assembly includes three or more blade elements, and the three or more blade elements are surrounded in the same direction to form the blade through hole.

[0024] According to one embodiment of the present application, each blade element includes a blade body and a sleeve connected to the blade body and supporting the rotation of the blade body, wherein the sleeve is rotatably arranged on the base and connected to the transmission mechanism, and the transmission mechanism drives each blade element to rotate axially to adjust the aperture size of the blade through hole.

[0025] According to one embodiment of the present application, the sleeve includes a sleeve body and driven teeth integrally formed with the sleeve body, wherein the driven teeth of each blade element are meshedly connected with the driving teeth of the transmission mechanism.

[0026] According to one embodiment of the present application, the shell further includes an upper cover, which is arranged in alignment with the base, wherein the driving mechanism, the transmission mechanism and the blade assembly are retained in a accommodating space formed by the upper cover and the base, and the pressure between the driving mechanism and the transmission mechanism is adjusted through the upper cover and the base.

[0027] According to one embodiment of the present application, the shell is further provided with a shell through hole and a structural gap, and the structural gap of the shell connects the shell through hole of the shell and the accommodating space of the shell, allowing the blade assembly to extend from the structural gap to the shell through hole.

[0028] According to one embodiment of the present application, the structural gap of the housing is formed between the upper cover and the base.

[0029] According to one embodiment of the present application, the base includes a base body and at least one first protrusion and at least one second protrusion extending from the base body toward the blade assembly, the first protrusion is located on the inner side of the second protrusion, and the first protrusion and the second protrusion are fixed to the base body by integral molding, wherein each of the blade elements is supported on the first protrusion and the second protrusion of the base.

[0030] According to one embodiment of the present application, an annular groove is further formed between the first protrusion and the second protrusion.

[0031] According to one embodiment of the present application, the second protrusion further includes three or more limiting protrusions, and each of the blade units of the blade assembly is rotatably supported on each of the limiting protrusions.

[0032] According to one embodiment of the present application, the second protrusion further includes or comprises a limiting protrusion, each limiting baffle of the transmission mechanism comprises a first limiting baffle and a second limiting baffle, and a limiting area of ​​the limiting baffle is formed between the first limiting baffle and the second limiting baffle, and at least a portion of the limiting protrusion of the base extends into the limiting area of ​​the limiting baffle.

[0033] According to one embodiment of the present application, the maximum rotation angle of the blade element is 3°.

[0034] According to one embodiment of the present application, it further includes a support assembly arranged on the top surface of the base, the transmission mechanism is supported above the support assembly of the base, and the transmission mechanism is clamped between the support assembly of the base and the drive mechanism.

[0035] According to one embodiment of the present application, the support assembly further includes a plurality of sliders, each of which is a raised hemispherical structure.

[0036] According to one embodiment of the present application, the base further includes at least three limiting columns extending from the base body toward the blade assembly, and the at least three limiting columns are in contact with the outer side wall of the transmission mechanism, thereby limiting the translation or tilt of the transmission mechanism.

[0037] According to another aspect of the present application, the present application further provides a camera module, comprising:

[0038] Photosensitive components;

[0039] a lens assembly, wherein the lens assembly is held in a light-sensing path of a light-sensing assembly; and

[0040] The variable aperture device as described above, wherein the variable aperture device is located on the light incident side of the lens assembly.

[0041] Further objectives and advantages of the present application will be fully reflected through understanding of the following description and drawings.

[0042] These and other objects, features and advantages of the present application are fully reflected in the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 1 is an exploded schematic diagram of a variable aperture device according to the first preferred embodiment of the present application.

[0044] Figure 2A FIG1 is a schematic top view of the variable aperture device according to the first preferred embodiment of the present application, which shows the maximum aperture state of the variable aperture device.

[0045] Figure 2B FIG1 is a schematic top view of the variable aperture device according to the first preferred embodiment of the present application, which shows the minimum aperture state of the variable aperture device.

[0046] Figure 3 1 is an enlarged schematic diagram of the structure of a blade of the variable aperture device according to the first preferred embodiment of the present application.

[0047] Figure 4 2 is a cross-sectional schematic diagram of the variable aperture device according to the first preferred embodiment of the present application.

[0048] Figure 5 2 is a schematic structural diagram of a base of the variable aperture device according to the first preferred embodiment of the present application.

[0049] Figure 6 2 is a schematic structural diagram of a driving component of the variable aperture device according to the first preferred embodiment of the present application.

[0050] Figure 7 FIG. 1 is a schematic diagram of some structural components of the variable aperture device according to the first preferred embodiment of the present application.

[0051] Figure 8 3D is a cross-sectional view of the variable aperture device according to the first preferred embodiment of the present application.

[0052] Figure 9A 2 is a schematic diagram of another optional implementation of the variable aperture device according to the first preferred embodiment of the present application.

[0053] Figure 9B It is a top view of another optional implementation of the variable aperture device according to the first preferred embodiment of the present application.

[0054] Figure 9C 2 is a schematic diagram of a driving component according to another optional implementation of the variable aperture device of the first preferred embodiment of the present application.

[0055] Figure 10 It is a structural diagram of a camera module according to another aspect of the present application. DETAILED DESCRIPTION

[0056] The following description is intended to disclose the present application and enable those skilled in the art to implement the present application. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art may readily conceive of other obvious variations. The basic principles of the present application defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present application.

[0057] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting this application.

[0058] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0059] According to one aspect of the present application, the present application provides a variable aperture device 20 and a camera module using the variable aperture device 20. In the technical solution of the present application, the variable aperture device 20 adjusts the aperture value of the camera module by changing the size of its aperture aperture, thereby achieving shooting with different aperture values.

[0060] Refer to the accompanying drawings of this application specification Figures 1 to 9C The following description illustrates the variable aperture device 20 according to the first preferred embodiment of the present application. The variable aperture device 20 includes a housing 21, a blade assembly 24 disposed within the housing 21, a transmission mechanism 23, and a drive mechanism 22. The blade assembly 24 is rotatably disposed within the housing 21, and the transmission mechanism 23 is driveably connected to the drive mechanism 22. The drive mechanism 22 drives the blade assembly 24 to rotate via the transmission mechanism 23, thereby achieving adjustable aperture size of the variable aperture device 20.

[0061] The housing 21 includes an upper cover 211 and a base 212. The upper cover 211 and the base 212 form a housing space for accommodating and protecting the blade assembly 24, the transmission mechanism 23, and the drive mechanism 22. In one embodiment of the present application, the upper cover 211 is used to cover and protect the upper and side surfaces of the variable aperture device 20. The upper cover 211 includes a cover body 2111 with a central light hole, four cover outer portions 2112 integrally connected to the outer side of the cover body 2111, and a cover inner portion 2113 located on the inner side of the cover body 2111. The base 212 has a central light hole. The light hole of the upper cover 211 and the light hole of the base 212 constitute the housing through hole 251 of the housing 21, thereby providing a light path for the imaging light of the camera module to pass through. Preferably, the light hole of the upper cover 211 and the light hole of the base 212 are circular with the same aperture.

[0062] The shell 21 has a light inlet and a light outlet, wherein the light inlet is formed on the light inlet side of the upper cover 211, and the light outlet is formed on the light outlet side of the base 212 of the shell 21, and the light inlet and the light outlet of the shell 21 are connected to the shell through hole 251 of the shell 21.

[0063] Optionally, in another embodiment of the present application, the upper cover 211 includes a cover body 2111, the base 212 includes a base body 2121 and four base side portions extending upward along the four sides of the base body 2121, and the base 212 is bonded and fixed to the upper cover 211 through the four base side portions.

[0064] It is worth mentioning that in one embodiment of the present application, the light hole of the upper cover 211 is coaxially arranged with the light hole of the base 212, so as to reduce the imaging interference of stray light on the camera module while ensuring the passage of imaging light.

[0065] In this preferred embodiment of the present application, the blade assembly 24 and the transmission mechanism 23 are transmission-connected, and the transmission mechanism 23 drives the blade assembly 24 to rotate in a specific direction. The transmission mechanism 23 is sandwiched between the base 212 of the housing 21 and the drive mechanism 22. Therefore, in this preferred embodiment of the present application, the transmission mechanism 22 and the base 212 are located on opposite sides of the transmission mechanism 23. As an example, in this preferred embodiment of the present application, the base 212 is located below the transmission mechanism 23 and the blade assembly 24, and the transmission mechanism 22 is located above the transmission mechanism 23 and the blade assembly 24, wherein the transmission mechanism 23 and the blade assembly 24 are supported by the base 212 of the housing 21, and the transmission mechanism 23 can be driven by the drive mechanism 22 under the support of the base 212, and the blade assembly 24 is driven by the transmission mechanism 23 to rotate.

[0066] like Figure 2A and Figure 2B As shown, the blade assembly 24 includes three or more blade elements 241, which are arranged counterclockwise (or clockwise) to form a blade through hole 252 with a variable aperture. It is understood that when the number of blade elements 241 in the variable aperture device 20 increases, the blade through hole 252 formed by the three or more blade elements 241 becomes closer to a circle, thereby achieving a better imaging effect of the camera module.

[0067] In one embodiment of the present application, the blade through-hole 252 has a central axis that is perpendicular to the plane formed by the three or more blade elements 241. The three or more blade elements 241 are rotationally symmetric about the central axis of the blade through-hole 252, thereby forming a rotationally symmetric pattern of the blade through-hole 252. In other words, when viewed from above (i.e., the direction of incident light), the three or more blade elements 241 are rotationally symmetric about the center of the blade through-hole 252, and each blade element 241 has the same shape.

[0068] It is worth mentioning that in the present application, the variable aperture device 20 has an aperture through hole 25 with a variable aperture. The aperture size of the aperture through hole 25 can be adjusted according to the shooting requirements of the camera module. The aperture size of the aperture through hole 25 can be determined by the minimum aperture of the blade through hole 252 or other elements in the variable aperture device 20. Preferably, in one embodiment of the present application, the maximum aperture state and the minimum aperture state of the aperture through hole 25 of the variable aperture device 20 are both determined by the blade through hole 252 surrounded by the three or more blade elements 241, that is, the three or more blade elements 241 change the aperture size of the aperture through hole 25 of the variable aperture device 20.

[0069] The aperture through-hole 25 formed by the variable aperture device 20 is located between the light inlet and the light outlet of the housing 21, and the aperture through-hole 25 of the variable aperture device 20 determines the amount of light entering the variable aperture device 20. In other words, the blade through-hole 252 formed by the blade assembly 24 is located inside the housing through-hole 251 of the housing 21. The movement of each blade element 241 of the blade assembly 24 defines the aperture size of the blade through-hole 252, thereby adjusting the amount of light entering the variable aperture device 20.

[0070] Optionally, in another embodiment of the present application, the minimum aperture state of the aperture through hole 25 of the variable aperture device 20 is determined by the blade through hole 252 surrounded by the three or more blade elements 241, and the maximum aperture state of the aperture through hole 25 of the variable aperture device 20 is determined by the minimum aperture of other components in the variable aperture device 20 (e.g., the housing through hole 251 of the housing 21). When the aperture of the blade through hole 252 surrounded by the three or more blade elements 241 becomes smaller, the aperture of the aperture through hole 25 of the variable aperture device 20 becomes smaller.

[0071] In this preferred embodiment of the present application, the housing 21 further comprises a structural gap 210, wherein the structural gap 210 connects the housing through-hole 251 of the housing 21 and the accommodating space of the housing 21. The blade assembly 24 located in the accommodating space of the housing 21 can be driven to extend from the structural gap 210 of the housing 21 to the housing through-hole 251 of the housing 21; or the blade assembly 24 can be driven to retract from the housing through-hole 251 of the housing 21 to the structural gap 210 of the housing 21. It is worth noting that, in the initial state, the blade assembly 24 is retained in the accommodating space of the housing 21, i.e., the variable aperture device 20 is in the maximum aperture state.

[0072] It is understood that the structural gap 210 of the housing 21 is formed between the upper cover 211 and the base 212 of the housing 21, wherein the height dimension of the structural gap 210 of the housing 21 is adapted to the thickness of the blade assembly 24 to allow the blade assembly 24 to extend or retract. It is understood that the surfaces of the upper cover 211 and the base 212 of the housing 21 are closed structures, and the structural gap 210 that allows the blade assembly 24 to extend and retract is formed inside the upper cover 211 and the base 212, thereby preventing dust and other impurities from entering the accommodating space of the housing 21.

[0073] Reference Figure 3 In a specific example of the present application, each blade element 241 includes a blade body 2411 and a shaft sleeve 2412 connected to the blade body 2411 and supporting the rotation of the blade body 2411. The blade body 2411 of each blade element 241 can rotate along an axis of the shaft sleeve 2412. Each blade element 241 is rotatably disposed on the base 212, wherein each blade element 241 is supported by the base 212, and the shaft sleeve 2412 of each blade element 241 is transmission-connected to the transmission mechanism 23, and the shaft sleeve 2412 of each blade element 241 is driven by the transmission mechanism 23 to move. In other words, in this preferred embodiment of the present application, each blade element 241 is driven by the transmission mechanism 23, and under the support of the base 212, the blade body 2411 performs axial rotational movement based on the shaft sleeve 2412.

[0074] The blade body 2411 includes a blade root 24114 proximal to the sleeve 2412, a blade end 24111 distal to the sleeve 2412, a blade inner portion 24112 connecting the blade root 24114 and the blade end 24111 and located on the inner side (proximal to the blade through-hole 252), and a blade outer portion 24113 connecting the blade root 24114 and the blade end 24111 and located on the outer side (away from the blade through-hole 252). At least a portion of the blade inner portion 24112 of the blade body 2411 of the blade element 241 constitutes the periphery of the blade through-hole 252 of the blade assembly 24. In one embodiment of the present application, a portion of the blade inner side 24112 of each blade element 241 at the same position constitutes the periphery of the blade through-hole 252 of the blade assembly 24, and the blade inner side 24112 of each blade element 241 has the same shape. The blade through hole 252 formed by the blade body 2411 of each blade element 241 is in a rotationally symmetrical pattern. In other words, the blade body 2411 is fixed to the shaft sleeve 2412 via the blade end 24111 .

[0075] The blade body 2411 of each blade element 241 is located above or below the blade body 2411 of the preceding (counterclockwise) blade element 241. Specifically, in the counterclockwise direction, in one embodiment of the present application, the blade body 2411 of each blade element 241 is located above the blade body 2411 of the preceding blade element 241 and below the blade body 2411 of the following blade element 241. In another embodiment of the present application, the blade body 2411 of each blade element 241 is located below the blade body 2411 of the preceding blade element 241 and above the blade body 2411 of the following blade element 241. In short, in this preferred embodiment of the present application, the blade elements 241 of the blade assembly 24 are arranged in sequence in a clockwise or counterclockwise direction, and the blade through-hole 252 with a variable inner diameter is formed by the blade elements 241 of the blade assembly 24. Under the support of the base 212, the blade assembly 24 is driven by the drive mechanism 22 through the transmission mechanism 23 to axially rotate the blade units 241 about the shaft sleeve 2412 to adjust the inner diameter of the blade through-hole 252.

[0076] In other embodiments of the present application, the blade body 2411 of each blade element 241 is respectively located above and below the blade bodies 2411 of its two adjacent blade elements 241. In other words, the blade bodies 2411 of the three or more blade elements 241 are arranged alternately high and low.

[0077] In another embodiment of the present application, each blade element 241 of the blade assembly 24 extends in a clockwise direction and surrounds a blade through hole 252 , but the present application is not limited thereto.

[0078] In a specific embodiment of the present application, the number of blade elements 241 of the blade assembly 24 is eight. Specifically, the blade bodies 2411 of each blade element 241 of the blade assembly 24 collectively form a blade through-hole 252 of the blade assembly 24. In the present application, the greater the number of blade elements 241 in the blade assembly 24, the closer the shape of the blade through-hole 252 approaches a circle. Therefore, the number of blade elements 241 in the blade assembly 24 is not limited and can be three, four, five, six, etc.

[0079] Preferably, the number of the blade elements 241 of the blade assembly 24 is an odd number, which can disperse the light of the subject with high brightness, avoid generating a strong light beam, and make the imaging softer.

[0080] Preferably, the blade body 2411 and the shaft sleeve 2412 are integrally formed. Optionally, in another embodiment of the present application, the blade body 2411 and the shaft sleeve 2412 are fixed by bonding, and the blade body 2411 and the shaft sleeve 2412 are made of two different materials. In this way, the thickness of the blade body 2411 can be kept relatively thin, and the structural strength of the shaft sleeve 2412 can also be maintained.

[0081] like Figure 2A and Figure 2B As shown, the blade assembly 24 has a maximum aperture state and a minimum aperture state, and under the support of the base 212, the blade assembly 24 drives each blade element 241 to switch between the maximum aperture state and the minimum aperture state through the transmission mechanism 23 by the driving mechanism 22. Figure 2A and Figure 2B Schematic diagrams are shown of the blade assembly 24 in two states, maximum aperture and minimum aperture, respectively. When the blade assembly 24 switches from the large aperture state to the small aperture state, the blade body 2411 of each blade element 241 rotates toward the center of the blade through-hole 252 based on the axial direction of the shaft sleeve 2412, thereby reducing the aperture of the blade through-hole 252 of the blade assembly 24. When the blade assembly 24 switches from the small aperture state to the large aperture state, the blade body 2411 of each blade element 241 rotates toward the center of the blade through-hole 252 based on the axial direction of the shaft sleeve 2412, thereby increasing the aperture of the blade through-hole 252 of the blade assembly 24.

[0082] The shaft sleeve 2412 of each blade unit 241 is transmission-connected to the transmission mechanism 23, and the shaft sleeve 2412 is driven by the transmission mechanism 23, so that each blade unit 241 rotates in an axial direction based on the shaft sleeve 2412 under the support of the base 212. Preferably, in this preferred embodiment of the present application, the shaft sleeve 2412 of each blade unit 241 is engaged with the transmission mechanism 23. Therefore, when the transmission mechanism 23 is driven by the drive mechanism 22 to produce an axial rotation, the transmission mechanism 23 drives each blade unit 241 engaged therewith to rotate axially. Optionally, in other optional embodiments of the present application, at least one blade unit 241 of the blade assembly 24 can be connected to the transmission mechanism 23 through other transmission methods, such as friction contact, hinge connection, etc.

[0083] Continue to refer to Figure 2A and Figure 2BThe sleeve 2412 of the blade element 241 includes a sleeve body 24121 and driven teeth 24122 integrally formed with the sleeve body 24121. The blade body 2411 is fixedly connected to one end of the sleeve body 24121, and the driven teeth 24122 are fixed to the other end of the sleeve body 24121 by integral molding. The driven teeth 24122 of the sleeve 2412 include a plurality of driven teeth 241221, and the driven teeth 24122 and the sleeve body 24121 are located in the same plane.

[0084] The transmission mechanism 23 includes a transmission body 231, three or more drive teeth 232 formed inside the transmission body 231, and one or more limit plates 233. A through hole is defined in the center of the transmission mechanism 23. The three or more drive teeth 232 and the one or more limit plates 233 are integrally formed on the inside of the transmission mechanism 23 (facing the blade elements 241). Each of the drive teeth 232 of the transmission mechanism 23 meshes with each of the blade units 241, and the transmission mechanism 23 drives each of the blade units 241 to rotate via the drive teeth 232.

[0085] Preferably, the transmission body 231 of the transmission mechanism 23 is an annular turntable structure, wherein each blade unit 241 of the blade assembly 24 is engaged on the inner side of the transmission body 231 of the transmission mechanism 23, that is, each blade unit 241 is internally engaged with the transmission body 231 of the transmission mechanism 23 in a transmission connection, and the transmission mechanism 23 drives each blade unit 241 inside to move.

[0086] Specifically, each driving tooth 232 includes a plurality of driving gear teeth 2321, which mesh with a plurality of driven gear teeth 241221 of the driven gear 24122 of the shaft sleeve 2412. Therefore, by rotating the transmission mechanism 23, the meshing relationship between the driven gears 24122 and the driving teeth 232 enables rotation of the blade element 241. The blade end 24111 of the blade body 2411, which is fixed to the shaft sleeve 2412, moves toward or away from the center of the blade through-hole 252, thereby adjusting the diameter of the blade through-hole 252 of the blade assembly 24.

[0087] Preferably, to maintain a good transmission relationship between the driving teeth 232 and the driven teeth 24122, in one embodiment of the present application, the number of the driving teeth 2321 is one less than the number of the driven teeth 241221. For example, the number of the driven teeth 241221 is four, and the number of the driving teeth 2321 is three. In another embodiment of the present application, the number of the driving teeth 2321 is equal to or greater than the number of the at least two driven teeth 241221. For example, the number of the plurality of driven teeth 241221 is four, and the number of the driving teeth 2321 is four, five, or even more. In other words, let M be the number of the driving teeth 2321 and N be the number of the plurality of driven teeth 241221. To prevent the driven teeth 24122 from jumping or falling off during driving, M ≥ N-1.

[0088] In one embodiment of the present application, the number of the driving teeth 232 of the transmission mechanism 23 is consistent with the number of the blade elements 241, so that each driving tooth 232 can correspond to a driven tooth 24122 on a blade element 241. In a specific example, the number of the driving teeth 232 of the transmission mechanism 23 is eight, and the eight driving teeth 232 respectively mesh with the driven teeth 24122 on eight blade elements 241.

[0089] like Figure 4 and Figure 5As shown, the base 212 includes a base body 2121 and at least one first protrusion 2122 and at least one second protrusion 2123 extending from the base body 2121 toward the blade assembly 24. The first protrusion 2122 is located inside the second protrusion 2123, and the first protrusion 2122 and the second protrusion 2123 are fixed to the base body 2121 through integral molding. The top surface of the second protrusion 2123 supports the shaft sleeve 2412 of the three or more blade elements 241, and the top surface of the first protrusion 2122 supports the blade body 2411 of the three or more blade elements 241. Therefore, the height of the top surface of the first protrusion 2122 and the top surface of the second protrusion 2123, and the position of the three or more blade elements 241, can be adjusted. An annular groove 2124 is also formed between the first protrusion 2122 and the second protrusion 2123. The annular groove 2124 reduces the contact area between the top surface of the second protrusion 2123 and the sleeve 2412 of the three or more blade elements 241, thereby reducing the frictional resistance of the sleeve 2412 during movement. Therefore, by adjusting the width of the annular groove 2124, the frictional resistance generated by the sleeve 2412 during movement of the blade element 241 can be adjusted. In one embodiment of the present application, dust-catching glue is arranged in the annular groove 2124 to capture dust and other dirt within the drive housing and entering through the housing through-hole 251.

[0090] It is worth mentioning that in this preferred embodiment of the present application, the structural gap 210 is formed between the first protrusion 2122 of the base 212 and the inner cover portion 2113 of the upper cover 211, that is, at the joint between the upper cover 211 and the base 212. It is understood that the structural gap 210 is an interface connecting the housing 21 of the variable aperture device 20 with the outside world, and is an opening formed on the inner side of the housing 21 to allow the blade assembly 24 to rotate and reduce the aperture of the blade through-hole 252.

[0091] Preferably, in one embodiment of the present application, the top surface of the first protrusion 2122 is slightly higher than the top surface of the second protrusion 2123, and the blade body 2411 of each blade element 241 can be positioned relatively high in the variable aperture device 20. Alternatively, in another embodiment of the present application, the top surface of the first protrusion 2122 is lower than the top surface of the second protrusion 2123, and thus the blade bodies 2411 of the three or more blade elements 241 can be positioned relatively low in the variable aperture device 20.

[0092] Reference Figure 5The second protrusion 2123 further includes three or more limiting protrusions 21231, the number of which matches the number of the blade elements 241. Each blade unit 241 of the blade assembly 24 is supported by the second protrusion 2123 and limited in rotational movement by the limiting protrusions 21231 of the second protrusion 2123. When the transmission mechanism 23 drives each blade element 241 to rotate, each blade element 241 is limited by the limiting protrusions 21231 and rotates axially based on the limiting protrusions 21231 of the second protrusion 2123.

[0093] Correspondingly, the sleeve 2412 of each blade element 241 has an axial hole 24123 formed in the sleeve body 24121. Each blade element 241 is rotatably fixed to the limiting protrusion 21231 of the base 212 through the axial hole 24123 of the sleeve 2412. When each blade element 241 is driven to rotate, it rotates counterclockwise or clockwise around its rotationally fixed limiting protrusion 21231, thereby adjusting the aperture size of the blade through-hole 252. For example, when three or more blade elements 241 rotate counterclockwise around the limiting protrusion 21231, the aperture size of the blade through-hole 252 decreases, and the aperture of the variable aperture device 20 decreases. In a specific embodiment of the present application, the number of the limiting protrusions 21231 is eight, and the eight blade elements 241 respectively cooperate with the eight limiting protrusions 21231 through the axial holes 24123 on the blade elements 241 and are rotatably fixed to the base 212.

[0094] In one embodiment of the present application, the limiting protrusions 21231 are evenly spaced and evenly distributed on a circular trajectory on the top surface of the second protrusion 2123 of the base 212. When each blade element 241 rotates around the at least three limiting protrusions 21231, the blade through holes 252 formed in the blade body 2411 of each blade element 241 are arranged in a symmetrical shape.

[0095] In one embodiment of the present application, the second protrusion 2123 further includes one or more limiting protrusions 21232, and each limiting baffle 233 of the transmission mechanism 23 includes a first limiting baffle 2331 and a second limiting baffle 2332, and a limiting area 2333 of the limiting baffle 233 is formed between the first limiting baffle 2331 and the second limiting baffle 2332, at least a portion of the one or more limiting protrusions 21232 of the base 212 extends into the limiting area 2333 of the limiting baffle 233, and the width of the limiting area 2333 of the limiting baffle 233 is greater than the width of the limiting protrusion 21232, and the rotation angle of the three or more blade elements 241 is limited by the one or more limiting protrusions 21232 of the base 212 and the one or more limiting baffles 233. Preferably, in this preferred embodiment of the present application, the transmission mechanism 23 is limited by the limiting protrusion 21232 of the base 212, so that the maximum rotation angle of each blade element 241 is 3°.

[0096] In a specific embodiment of the present application, the number of the one or more limiting protrusions 21232 is eight, and the eight limiting protrusions 21232 and the eight limiting protrusions 21231 are alternately arranged in a circumferential direction on the top surface of the second protrusion. The number of the one or more limiting baffles 233 is the same as the number of the limiting protrusions 21232, and the number is also eight. The eight limiting baffles 233 cooperate with the eight limiting protrusions 21232 to limit the maximum rotation angle of the eight blade assemblies 24. In one embodiment of the present application, the eight limiting baffles 233 and the eight driving teeth 232 extend alternately from the transmission mechanism 23 toward the center, and the eight limiting baffles 233 are equally spaced, and the eight driving teeth 232 are equally spaced.

[0097] In order to keep the transmission mechanism 23 rotating under the drive of the driving mechanism 22, the base 212 further includes at least three limiting columns 2128 extending from the base body 2121 toward the blade assembly 24. The at least three limiting columns 2128 are located on the outside of the limiting protrusion 21232 and are fixed to the base body 2121 by integral molding or bonding.

[0098] Reference Figure 2A and Figure 2BTo prevent translation or tilting of the transmission mechanism 23 when the transmission mechanism 23 rotates, the transmission mechanism 23 has a circular outer wall. The at least three limiting posts 2128 contact the outer wall of the transmission mechanism 23, thereby limiting translation or tilting of the transmission mechanism 23. In a specific embodiment of the present application, the at least three limiting posts 2128 are three in number. The three limiting posts 2128 are evenly spaced and contact the outer wall of the transmission mechanism 23. The three limiting posts 2128 are cylindrical in shape.

[0099] The transmission mechanism 23 is driven by the driving mechanism 22 to rotate, thereby driving the blade element 241 to rotate, and adjusting the aperture size of the blade through hole 252, thereby achieving continuous adjustment or step adjustment of the aperture of the camera module.

[0100] In the present application, the driving mechanism 22 is implemented as a piezoelectric motor, wherein the piezoelectric motor has large thrust and small size, which facilitates the large-angle rotation of the transmission mechanism 23, and the self-locking function of the piezoelectric motor can also enable the aperture size of the blade through hole 252 to be maintained when no power is supplied.

[0101] Figure 6 An embodiment of the drive mechanism 22 described in the present application is shown. The drive mechanism 22 is located above the transmission mechanism 23 and is transmissionably connected to the transmission mechanism 23. In a first preferred embodiment of the present application, the drive mechanism 22 includes a piezoelectric component 221 and a drive circuit board 223 electrically connected to the piezoelectric component 221. The piezoelectric component 221 is transmissionably connected to the transmission mechanism 23. The drive circuit board 223 can provide excitation power to the piezoelectric component 221, so that the piezoelectric component 221 drives the transmission mechanism 23 to rotate in a specific direction.

[0102] The transmission mechanism 23 is clamped between the base 212 of the shell 21 and the piezoelectric component 221 of the driving mechanism 22, wherein the piezoelectric component 221 of the driving mechanism 22 is in contact with the transmission mechanism 23, and the piezoelectric component 221 of the driving mechanism 22 drives the transmission mechanism 23 to move in a specific direction by friction.

[0103] The driving circuit board 223 includes a circuit board body 2231 and an electrical connection portion 2232, which are electrically connected to each other. The circuit board body 2231 has a through hole in the middle for light to pass through. The electrical connection portion 2232 extends outward from the circuit board body 2231 and bends. The driving circuit board 223 is electrically connected to the piezoelectric component 221 through the circuit board body 2231 and is electrically connected to an external circuit through the electrical connection portion 2232.

[0104] Preferably, in this preferred embodiment of the present application, the piezoelectric component 221 has a ring-shaped, arc-shaped or semi-ring-shaped structure.

[0105] The piezoelectric assembly 221 includes a piezoelectric element 2211 and a friction drive portion 2212 fixed to the bottom surface of the piezoelectric element 2211. The drive mechanism 22 is in friction contact with the top surface of the transmission mechanism 23 through the friction drive portion 2212. The piezoelectric element 2211 is an annular structure, and the center of the piezoelectric element 2211 has a through hole for light to pass through, that is, the piezoelectric element 2211 is an annular piezoelectric element. The friction drive portion 2212 further includes a plurality of friction heads 22121 in an annular shape and distributed at equal intervals. The plurality of friction heads 22121 are elastic. One end of the plurality of friction heads 22121 is rotatably fixed to the bottom surface of the piezoelectric element 2211, and the bottom surface of the other end of the plurality of friction heads 22121 has a higher friction coefficient, providing greater friction force. In one embodiment of the present application, the upper cover 211 provides pre-pressure to the drive mechanism 22. The drive mechanism 22 frictionally contacts the top surface of the transmission mechanism 23 via the multiple friction heads 22121 of the friction drive portion 2212, thereby driving the transmission mechanism 23 to rotate. The magnitude of the pre-pressure can be adjusted by adjusting the distance between the upper cover 211 and the base 212.

[0106] It is worth noting that the piezoelectric element 2211 is made of piezoelectric material. A two-phase electrical signal with a 90° phase difference is applied to corresponding regions of the piezoelectric assembly 221 via the drive circuit board 223. Through the inverse piezoelectric effect, the piezoelectric assembly 221 generates traveling wave motion, driving the transmission mechanism 23 to rotate. The transmission mechanism 23 then rotates the three or more blade elements 241, changing the aperture size of the blade through-holes 252. Clockwise / counterclockwise rotation of the transmission mechanism 23 is achieved by adjusting the phase difference of the two-phase electrical signal. When the piezoelectric element 2211 of the piezoelectric assembly 221 receives an external signal, it vibrates due to the inverse piezoelectric effect. This causes the multiple friction heads 22121 fixed to the bottom surface of the piezoelectric element 2211 to produce elliptical motion, thereby frictionally driving the transmission mechanism 23 to rotate. In short, in this preferred embodiment of the present application, the piezoelectric element 2211 is an annular piezoelectric element, which, when electrically conductive, can output a friction force that drives the transmission mechanism 23 to rotate.

[0107] In one embodiment of the present application, the external signal provided to the piezoelectric element 2211 is a traveling wave signal, and the piezoelectric component 221 utilizes the circumferential propagation of the traveling wave to drive the transmission mechanism 23 to rotate. Specifically, the traveling wave signal causes the multiple friction heads 22121 of the piezoelectric component 221 to move along elliptical trajectories at surface points in contact with the transmission mechanism 23, and the friction force generated by the contact between the multiple friction heads 22121 and the transmission mechanism 23 drives the transmission mechanism 23 to rotate.

[0108] In one embodiment of the present application, the transmission mechanism 23 includes a friction member 2311 with a through hole in the center. The friction member 2311 is fixed to the top surface of the transmission body 231 by bonding or integral molding. The transmission mechanism 23 contacts the friction driving part 2212 of the driving mechanism 22 through the friction member 2311 on its top surface. The friction member 2311 can increase the friction coefficient of the top surface of the transmission mechanism 23, provide a flat surface on the top surface of the transmission mechanism 23, and stabilize the working state of the driving mechanism 22.

[0109] It can be understood that in this preferred embodiment of the present application, the friction member 2311 is fixedly connected to the transmission body 231, and the friction member 2311 is in contact with the drive mechanism 22, wherein the single-side width of the friction member 2311 is greater than the single-side width of the transmission body 231 in the transverse direction, which is beneficial to increase the contact area between the transmission mechanism 23 and the drive mechanism 22, thereby facilitating the drive mechanism 22 to provide friction force to drive the transmission mechanism 23 through the friction member 2311.

[0110] In one embodiment of the present application, the friction member 2311 extends inward from the upper portion of the transmission body 231 and covers the shaft holes 24123 of the three or more blade elements 241. The friction member 2311 maintains the smooth movement of each blade element 241 during rotation, thereby reducing the risk of the three or more blade elements 241 falling off. It will be appreciated that in this preferred embodiment of the present application, the friction member 2311 has a friction surface and a connection surface, wherein the connection surface of the friction member 2311 is fixedly connected to the transmission body 231 of the transmission mechanism 23. The friction surface of the friction member 2311 faces the drive mechanism 22, and the friction head 22121 of the piezoelectric component of the drive mechanism 22 contacts the friction surface of the friction member 2311. The friction surface of the friction member 2311 is roughened to increase friction between the transmission mechanism 23 and the drive mechanism 22.

[0111] The variable aperture device 20 further includes a supporting component 2125 disposed on the top surface of the base 212 and the bottom surface of the transmission mechanism 23. Figure 4 As shown, the support assembly 2125 and the driving mechanism 22 clamp the transmission mechanism 23 .

[0112] The transmission mechanism 23 is supported above the support assembly 2125 of the base 212, and the transmission mechanism 23 is clamped between the support assembly 2125 of the base 212 and the drive mechanism 22. The transmission mechanism 23 and the drive mechanism 22 are in contact, and there is a preset pressure between the drive mechanism 22 and the transmission mechanism 23, so that the drive mechanism 22 drives the transmission mechanism 23 to rotate in a friction transmission manner. It is worth mentioning that the upper cover 211 is covered above the drive mechanism 22, and the pressure between the transmission mechanism 23 and the drive mechanism 22 is adjusted by the upper cover 211 to ensure that when the drive mechanism 22 moves, the drive mechanism 22 can provide sufficient force to drive the transmission mechanism 22 to move.

[0113] Reference Figure 5 and Figure 7 In the illustrated embodiment, the support assembly 2125 is fixed to the top surface of the base body 2121 of the base 212. In a specific embodiment of the present application, the support assembly 2125 includes a plurality of sliders 21251 formed on the top surface of the base body 2121. The plurality of sliders 21251 provide a plane for the transmission mechanism 23 and support the transmission mechanism 23. As an example, the plurality of sliders 21251 can be eight hemispherical sliders 21251 that are equally spaced and distributed in a ring around the second protrusion. In an embodiment of the present application, the bottom surface of the transmission mechanism 23 corresponding to the plurality of sliders 21251 is recessed inward to form an annular track. By the cooperation of the annular track on the bottom surface of the transmission mechanism 23 and the plurality of sliders 21251, the transmission mechanism 23 is not easily translated during rotation.

[0114] In the present application, the pressure required by the drive mechanism 22 and the transmission mechanism 23 is provided by fixing the upper cover 211 to the base 212 to maintain frictional contact between the drive mechanism 22 and the transmission mechanism 23. Furthermore, the magnitude of the pre-pressure provided to the drive mechanism 22 and the transmission mechanism 23 can be adjusted by changing the distance between the upper cover 211 and the base 212. In the present application, since the magnitude of the pre-pressure needs to be changed by adjusting the distance between the upper cover 211 and the base 212, an air gap is provided between the plurality of limiting posts 2128 and the upper cover 211 to prevent any influence on the adjustment of the distance between the upper cover 211 and the base 212.

[0115] like Figure 1 and Figure 8 As shown, the base 212 further includes four fixing protrusions 2126 extending upward from the four corners of the top surface of the base body 2121, and four fixing recesses 2127 recessed upward from the four corners of the bottom surface of the base body 2121. The four fixing recesses 2127 are formed between the base body 2121 and the four fixing protrusions 2126. By placing an adhesive in the four fixing recesses 2127, the upper cover 211 and the base 212 are bonded and fixed. The fixing recesses 2127 increase the bonding area between the base 212 and the upper cover 211, thereby enhancing the bonding stability between the upper cover 211 and the base 212.

[0116] In one embodiment of the present application, the variable aperture device 20 further includes a position sensing device (not shown in the figure), which is used to sense the rotation degree of the transmission mechanism 23, thereby controlling the aperture size of the blade through hole 252.

[0117] Figures 1 to 8 The present application shows a driving mode in which a piezoelectric component 221 that outputs rotational motion is used as a driving mechanism 22 to drive the transmission mechanism 23 to rotate; Figures 9A-9C Another driving mechanism 22 that outputs linear motion is shown, wherein the driving mechanism 22 includes a piezoelectric component 221A and a driving circuit board 223 connected to the piezoelectric component 221A, wherein the piezoelectric component 221A of the driving mechanism 22 outputs linear motion for driving the transmission mechanism 23 to rotate under the action of the driving circuit board 223.

[0118] Specifically, the piezoelectric assembly 221A includes a piezoelectric element 2211A and a friction drive portion 2212A fixed to the bottom surface of the piezoelectric element 2211A. At least one piezoelectric element 2211A is made of piezoelectric material. By applying two 90° phase-shifted sinusoidal signals to at least one piezoelectric element 2211A of the piezoelectric assembly 221A, the piezoelectric element 2211A is strained and deformed. A high-frequency alternating voltage is then used to cause the piezoelectric element 2211A to resonate, thereby causing the piezoelectric assembly 221A to drive the transmission mechanism 23 to move. That is, in this preferred embodiment of the present application, the piezoelectric element 2211A of the piezoelectric assembly 221A is implemented as a linear piezoelectric element, which, when electrically conductive, can provide the force driving the linear motion of the transmission mechanism 23.

[0119] It is worth mentioning that, unlike the first preferred embodiment described above, in this preferred embodiment of the present application, the piezoelectric element 2211A of the piezoelectric assembly 221A is in a straight plate structure.

[0120] Similar to the above-described preferred embodiment, the friction drive unit 2212A includes a friction head 22121A. The piezoelectric assembly 221A is in frictional contact with the transmission mechanism 23 via at least one friction head 22121A on the friction drive unit 2212A. The friction head 22121A is elastic. The friction drive unit 2212A is transmissionably connected to the piezoelectric element 2211A. When the piezoelectric element 2211A is turned on, the friction drive unit 2212 deforms in response to the deformation of the piezoelectric element 2211A, thereby driving at least one friction head 22121A to generate unidirectional oscillatory reciprocating motion along a predetermined direction. Under the action of the piezoelectric element 2211A, the friction drive unit 2212A provides a driving force for driving the transmission mechanism 23. In one embodiment of the present application, there are multiple friction heads 22121A, for example, four, so that the piezoelectric assembly 221A can stably output a linear driving force.

[0121] In one embodiment of the present application, a traveling wave signal is provided, causing the piezoelectric element 2211A to deform under the inverse piezoelectric effect, thereby driving the friction drive portion 2212A to move in a traveling wave manner. The deformation of the piezoelectric element 2211A is transmitted to the friction drive portion 2212A, and the traveling wave motion of the friction drive portion 2212A provides a driving force for driving the transmission mechanism 23. In another embodiment of the present application, a standing wave signal is applied to the piezoelectric element 2211A, and the deformation of the piezoelectric element 2211A drives the friction drive portion 2212A to move in a standing wave manner along a predetermined direction, although this is not a limitation of the present application.

[0122] Reference Figures 9A to 9B The piezoelectric component 221A is arranged between the upper cover 211 and the transmission mechanism 23. The upper cover 211 provides pre-pressure to the piezoelectric component 221A. The piezoelectric component 221A is in friction contact with the top surface of the transmission mechanism 23 through at least one friction head 22121 of the friction driving part 2212, so that the piezoelectric component 221A drives the transmission mechanism 23 to move.

[0123] In one embodiment of the present application, the driving mechanism 22 includes a piezoelectric component 221A, which is disposed on an edge of the top surface of the transmission mechanism 23 and in frictional contact with the top surface of the transmission mechanism 23. In another embodiment of the present application, the driving mechanism 22 includes multiple piezoelectric components 221A, which are disposed at equal intervals on the edges of the top surface of the transmission mechanism 23 and in frictional contact with the top surface of the transmission mechanism 23. The driving directions of the multiple piezoelectric components 221A are all clockwise or counterclockwise.

[0124] Reference Figure 9B When the driving mechanism 22 includes two piezoelectric components 221A, the two piezoelectric components 221A are respectively arranged on opposite sides of the edge of the top surface of the transmission mechanism 23, and when the two piezoelectric components are turned on, the driving directions of the two piezoelectric components are opposite, thereby realizing the rotation of the transmission mechanism 23.

[0125] In one embodiment of the present application, the transmission mechanism 23 includes a friction member 2311 with a through hole in the center. The friction member 2311 is fixed to the top surface of the transmission body 231 by bonding or integral molding. The transmission mechanism 23 contacts the friction drive part 2212 of the linear drive assembly through the friction member 2311 on its top surface. The friction member 2311 can effectively increase the friction coefficient of the top surface of the transmission mechanism 23, provide a flat surface on the top surface of the transmission mechanism 23, and stabilize the working state of the piezoelectric assembly 221A.

[0126] The variable aperture device 20 further includes a support component 2125 disposed on the top surface of the base 212 and the bottom surface of the transmission mechanism 23. The support component 2125 and the piezoelectric component 221A clamp the transmission mechanism 23. Figure 9AThe support assembly 2125 includes sliders 21251 integrally formed on the top surface of the base body 2121. The multiple sliders 21251 provide a flat surface for the transmission mechanism 23 and support the transmission mechanism 23. Specifically, the sliders 21251 may be eight hemispherical sliders 21251 equidistantly distributed in a circular pattern around the second protrusion. Alternatively, in another embodiment of the present application, the sliders 21251 may be implemented as ball bearings, wherein the sliders 21251 are rotatably mounted on the base body 2121.

[0127] In another embodiment of the present application, the support assembly 2125 includes an annular extension leg extending downward from the transmission body 231 , and the transmission mechanism 23 is supported on the base 212 by the annular extension leg of the transmission mechanism 23 .

[0128] In order to realize and stabilize the rotational movement of the transmission mechanism 23 , the variable aperture device 20 further includes a rotation guide assembly.

[0129] In one embodiment of the present application, the rotational guide assembly comprises a plurality of limiting posts 2128 extending from the base body 2121 toward the blade assembly 24. These limiting posts 2128 are located outside the limiting protrusions 21232 and are fixed to the base body 2121 via integral molding or bonding. These limiting posts 2128 contact the circular outer wall of the transmission mechanism 23, thereby limiting the translation or tilt of the transmission mechanism 23, allowing the variable aperture carrier to rotate under the drive of the piezoelectric assembly 221A. In one specific example, there are three limiting posts 2128, equidistantly spaced and contacting the outer wall of the transmission mechanism 23. Each limiting post 2128 is cylindrical in shape.

[0130] In another embodiment of the present application, the rotation guide assembly is an inwardly recessed annular track formed on the bottom surface of the transmission mechanism 23 and opposite the multiple sliders 21251. The annular track of the transmission mechanism 23 coincides with the center of the light hole of the base 212. The cooperation between the annular track of the transmission mechanism 23 and the multiple sliders 21251 restricts the translation or tilt of the transmission mechanism 23, causing the variable aperture carrier to rotate under the drive of the piezoelectric assembly 221A.

[0131] In another embodiment of the present application, the rotation guide assembly is an inwardly recessed annular track formed on the top surface of the base body 2121 and opposite the annular extension leg of the transmission mechanism 23. The annular track of the base body 2121 is disposed outside the second protrusion 2123 and coincides with the center of the light aperture of the base 212. The annular extension leg is disposed within the annular track of the base body 2121. The cooperation between the annular track of the base body 2121 and the annular extension leg restricts the translation or tilt of the transmission mechanism 23, causing the variable aperture carrier to rotate under the drive of the piezoelectric assembly 221A.

[0132] Refer to the accompanying drawings of this application specification Figure 10 As shown, a camera module according to another aspect of the present application is described below. The camera module includes a photosensitive component 30, a lens component 10 held on the light sensing path of the photosensitive component 30, and a variable aperture device 20.

[0133] Accordingly, the lens assembly 10 includes an optical lens 11 and a lens driving assembly 12 that drives the optical lens 11 to move. The optical lens 11 is an integrated lens, which includes a lens barrel 111 and at least a lens group 112 accommodated in the lens barrel 111, and the lens group 112 includes an optical lens. As an example, in this preferred embodiment of the present application, the lens driving assembly 12 includes a lens driving movable part, a lens driving fixed part, and a lens driving element arranged between the lens driving movable part and the lens driving fixed part, and the lens driving element drives the lens moving part to move relative to the lens fixed part. The optical lens 11 is fixed to the lens moving part of the lens driving assembly 12 and is driven by the lens driving assembly 12 to move along the optical axis or perpendicular to the optical axis, thereby realizing the autofocus function or optical image stabilization function of the camera module.

[0134] In another embodiment of the present application, the optical lens 11 is a split lens, which includes multiple lens parts. As an example, the split lens includes a first lens part and a second lens part arranged along the optical axis, the second lens part includes a second lens barrel and at least one second lens installed in the second lens barrel, the first lens component includes a first lens, and in some embodiments, the first lens component also includes a first lens barrel, and the first lens is accommodated in the first lens barrel.

[0135] The photosensitive assembly 30 includes a chip circuit board 31, a photosensitive chip 32 mounted on the chip circuit board 31, an electronic component 33, a connector 36, a base 34, and a filter element 35. The chip circuit board 31 includes a circuit board body 311, a connecting strip 312, and a connector portion 313. The connecting strip 312 connects the circuit board body 311 and the connector portion 313 and achieves electrical conduction between the circuit board body 311 and the connector portion 313. The photosensitive chip 32 and the electronic component 33 are electrically connected to the circuit board body 311, and the connector 36 is mounted on the connector portion 313.

[0136] The photosensitive chip 32 is used to receive the external light imaging collected by the lens assembly 10 and is electrically connected to the portable device through the chip circuit board 31. The photosensitive chip 32 includes a photosensitive area and a non-photosensitive area. The photosensitive chip 32 is electrically connected to the chip circuit board 31 through the photosensitive chip 32 pad located in the non-photosensitive area. For example, the photosensitive chip 32 is electrically connected to the circuit board body 311 of the chip circuit board 31 through wire bonding (gold wire), welding, FC process (chip flip-chip) or RDL (rewiring layer technology). The photosensitive chip 32 is fixed to the front of the circuit board body 311 by an adhesive medium (the surface of the chip circuit board 31 facing the lens assembly 10 is defined as the front, and the side of the chip circuit board 31 opposite to the front is the bottom surface of the chip circuit board 31). In some embodiments of the present application, the circuit board body 311 has a groove or a through hole (circuit board through hole) in the middle, and the photosensitive chip 32 is installed and fixed in the groove or circuit board through hole of the circuit board body 311, thereby reducing the influence of the thickness of the circuit board body 311 on the thickness of the photosensitive component 30 and reducing the height of the camera module.

[0137] The base 34 is disposed on the circuit board body 311 of the chip circuit board 31 and is used to support other components. In one embodiment of the present application, the base 34 is implemented as a separately molded plastic bracket, which is attached to the surface of the circuit board body 311 via an adhesive medium and is used to support other components. Of course, in other embodiments of the present application, the base 34 can also be formed on the circuit board body 311 in other ways. For example, the base 34 is implemented as a molded base, which is integrally formed at a predetermined position on the circuit board body 311 through a molding process, and this is not limited to this application.

[0138] In one embodiment of the present application, the filter element 35 is maintained on the photosensitive path of the photosensitive chip 32, and is used to filter the imaging light entering the photosensitive chip 32. In a specific embodiment of the present application, the filter element 35 is mounted on the base 34 and corresponds to at least the photosensitive area of ​​the photosensitive chip 32. It is worth mentioning that in other examples of the present application, the filter element 35 can be indirectly mounted on the base 34 through other supporting members. In addition, in other embodiments of the present application, the filter element 35 can also be installed at other positions of the camera module, for example, the filter element 35 is formed in the optical lens 11 (for example, as a layer of filter film attached to the surface of a certain optical lens of the optical lens 11), which is not limited to the present application.

[0139] In one embodiment of the present application, the photosensitive component 30 also includes a chip driving component (not shown in the drawings), which can drive the photosensitive chip 32 of the photosensitive component 30 to translate, rotate or tilt, thereby realizing the chip anti-shake function of the camera module.

[0140] The variable aperture device 20 is installed on the top surface or the middle of the optical lens 11. In one embodiment of the present application, the variable aperture device 20 is installed on the top surface of the optical lens 11, and the variable aperture device 20 is fixed to the optical lens 11. Specifically, the base 212 of the variable aperture device 20 is bonded to the lens barrel 111 of the optical lens 11 through an adhesive medium, and at least a portion of the optical lens 11 extends into the housing through hole 251 of the variable aperture device 20. The drive circuit board 223 of the variable aperture device 20 is electrically connected to the lens drive assembly 12. In one embodiment of the present application, the drive circuit board of the variable aperture is electrically connected to the spring of the lens drive assembly 12 for resetting the transmission mechanism 23.

[0141] In another embodiment of the present application, when the optical lens 11 is a split lens, the variable aperture device 20 can be disposed in the middle of the optical lens 11. Specifically, the second lens portion is mounted and fixed to the lens drive assembly 12, the first lens portion is mounted and fixed to the top surface of the variable aperture device 20, and the variable aperture device 20 is further mounted and fixed to the lens barrel 111 of the optical lens 11, so that the first lens portion and the second lens portion are arranged along the optical axis of the optical lens 11.

[0142] Those skilled in the art will understand that the embodiments of the present application described above and shown in the accompanying drawings are intended only as examples and do not limit the present application. The objectives of the present application have been fully and effectively achieved. The functional and structural principles of the present application have been demonstrated and explained in the embodiments. The embodiments of the present application may be modified or altered in any manner without departing from the principles described.

Claims

1. A variable aperture device, characterized in that: include: a housing, the housing comprising a base; a driving mechanism, the driving mechanism being disposed on the housing; a transmission mechanism, the transmission mechanism being sandwiched between the driving mechanism and the base, and the transmission mechanism being transmission-connected to the driving mechanism; as well as a blade assembly rotatably disposed on the base and drivingly connected to the transmission mechanism, wherein the driving mechanism drives the transmission mechanism, and the transmission mechanism drives the blade assembly to form a blade through hole with a variable aperture; The transmission mechanism includes a transmission body and a friction member, wherein the friction member is fixedly connected to the transmission body and contacts the drive mechanism; The friction member covers the transmission body, a single side width of the friction member is greater than a single side width of the transmission body in a transverse direction, and the friction member extends inward from the upper side of the transmission body to the blade assembly.

2. The variable aperture device according to claim 1, wherein the driving mechanism comprises a piezoelectric component and a driving circuit board electrically connected to the piezoelectric component, wherein the piezoelectric component contacts the transmission mechanism, and the piezoelectric component of the driving mechanism drives the transmission mechanism to rotate by friction.

3. The variable aperture device according to claim 2, wherein the piezoelectric assembly includes a piezoelectric element and a friction drive portion fixed to the bottom surface of the piezoelectric element, the drive mechanism is in frictional contact with the top surface of the transmission mechanism through the friction drive portion, and the piezoelectric element is an annular piezoelectric element.

4. The variable aperture device according to claim 2, wherein the piezoelectric assembly includes a piezoelectric element and a friction drive portion fixed to the bottom surface of the piezoelectric element, the drive mechanism is in frictional contact with the top surface of the transmission mechanism through the friction drive portion, and the piezoelectric element is a linear piezoelectric element.

5. The variable aperture device according to claim 1, wherein the transmission mechanism further comprises three or more driving teeth, wherein the driving teeth are integrally formed on the inner side of the transmission body, and wherein the blade assembly is meshedly connected with the three or more driving teeth of the transmission mechanism. 6 . The variable aperture device according to claim 5 , wherein the blade assembly comprises three or more blade elements, and the three or more blade elements are surrounded in the same direction to form the blade through hole.

7. The variable aperture device according to claim 6, wherein each blade element comprises a blade body and a sleeve connected to the blade body and supporting the rotation of the blade body, wherein the sleeve is rotatably arranged on the base and connected to the transmission mechanism, and the transmission mechanism drives each blade element to rotate axially to adjust the aperture size of the blade through hole.

8. The variable aperture device according to claim 7, wherein the sleeve comprises a sleeve body and driven teeth integrally formed with the sleeve body, wherein the driven teeth of each blade element are meshedly connected with the driving teeth of the transmission mechanism.

9. The variable aperture device according to claim 1, wherein the housing further comprises an upper cover, the upper cover being arranged in alignment with the base, wherein the driving mechanism, the transmission mechanism and the blade assembly are retained in an accommodating space formed by the upper cover and the base, and the pressure between the driving mechanism and the transmission mechanism is adjusted by the distance between the upper cover and the base.

10. The variable aperture device according to claim 9, wherein the housing is further provided with a housing through hole and a structural gap, the structural gap of the housing communicates with the housing through hole of the housing and the accommodating space of the housing, allowing the blade assembly to extend from the structural gap to the housing through hole, wherein the housing and the structural gap are formed between the upper cover and the base.

11. The variable aperture device according to claim 7, wherein the base comprises a base body and at least one first protrusion and at least one second protrusion extending from the base body toward the blade assembly, the first protrusion being located on the inner side of the second protrusion, the first protrusion and the second protrusion being fixed to the base body by integral molding, wherein each of the blade elements is supported on the first protrusion and the second protrusion of the base. 12 . The variable aperture device according to claim 11 , wherein an annular groove is formed between the first protrusion and the second protrusion. 13 . The variable aperture device according to claim 11 , wherein the second protrusion further comprises three or more limiting protrusions, and each of the blade elements of the blade assembly is rotatably supported on each of the limiting protrusions.

14. The variable aperture device according to claim 11, wherein the second protrusion further includes one or more limiting protrusions, each limiting baffle of the transmission mechanism includes a first limiting baffle and a second limiting baffle, and a limiting area of ​​the limiting baffle is formed between the first limiting baffle and the second limiting baffle, and at least a portion of the limiting protrusion of the base extends into the limiting area of ​​the limiting baffle.

15. The variable aperture device according to claim 1, further comprising a support assembly disposed on the top surface of the base, the transmission mechanism being supported above the support assembly of the base, and the transmission mechanism being clamped between the support assembly of the base and the drive mechanism. 16 . The variable aperture device according to claim 15 , wherein the supporting assembly further comprises a plurality of sliders, each slider being a convex hemispherical structure.

17. The variable aperture device according to claim 11, wherein the base further comprises at least three limiting posts extending from the base body toward the blade assembly, the at least three limiting posts contacting the outer side wall of the transmission mechanism, thereby limiting the translation or tilt of the transmission mechanism.

18. A camera module, characterized in that: include: Photosensitive components; a lens assembly, wherein the lens assembly is held in the light-sensing path of the light-sensing assembly; as well as The variable aperture device according to any one of claims 1 to 17, wherein the variable aperture device is located on the light incident side of the lens assembly.

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