CN116208825A - Iris device and camera module with iris device - Google Patents

Abstract

The invention provides an iris diaphragm device and an image pickup module with the iris diaphragm device, wherein the iris diaphragm device comprises a shell, a blade assembly, a transmission mechanism and a driving assembly, wherein the transmission mechanism is rotatably arranged on the shell and is in transmission connection with the blade assembly, the blade assembly is driven by the transmission mechanism to form a light transmission hole with a variable aperture, the driving assembly further comprises a driving member, a restoring member, a fixed part and a movable part, the transmission mechanism is in transmission connection with the movable part, the driving member and the restoring member are telescopically arranged between the movable part and the fixed part, and the driving member and the restoring member are positioned on opposite sides of the movable part and drive the transmission mechanism to rotate reciprocally by the driving member and the restoring member through the movable part.

Description

Iris device and camera module with iris device

technical field

The invention relates to the technical field of optical imaging, in particular to a variable aperture device and a camera module with the variable aperture device.

Background technique

In recent years, the volume of camera modules mounted on portable devices such as smartphones and tablet computers has become smaller and smaller, which increases the aperture index of the camera. However, in many traditional camera modules, the aperture index is uniquely determined and cannot be changed universally. Therefore, there is a need for a small and thin variable aperture device capable of changing the aperture index of a camera of a portable device.

The variable aperture is an important part of the camera module. The variable aperture has an aperture. By adjusting the area of the aperture, the amount of light entering the camera module can be adjusted, so that the camera module has different brightness and depth of field. The area of the aperture is relatively small. When the aperture is large, the camera module has a larger amount of incoming light, making the formed image brighter and the background blur effect is better. When the area of the aperture is smaller, the camera module has a smaller amount of incoming light, so that in the formed image, The details are clear.

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 smart phones and tablet computers are small in size and thin in thickness, and the space for installing the camera module is also very small. Therefore, a fixed aperture device with a simple structure is usually provided, but the size of the aperture of the fixed aperture device is fixed, which cannot be better adapted to different shooting scenarios.

With the development of the market, portable devices that use a fixed aperture device to take 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 needs of the camera module in different shots. The shooting requirements of the scene, and to meet this requirement, a variable aperture device that can adjust the size of the aperture is desired. However, the volume of the iris in the prior art is generally large, and a driving mechanism is required to drive the iris to move, so that the lens with the iris function is relatively large, which is not conducive to the miniaturization design of the camera module.

Contents of the invention

A main advantage of the present invention is to provide an iris device and a camera module with the iris device, wherein the iris device has a light aperture with a variable aperture, by adjusting the aperture of the aperture The aperture adjusts the amount of light entering the camera module, which is beneficial to meet the requirements of the camera module for the amount of light entering.

Another advantage of the present invention is to provide a variable aperture device and a camera module with the variable aperture device, wherein the variable aperture device includes a casing, a drive assembly, a transmission mechanism, and a ground that is driven with the transmission mechanism A connected blade assembly, wherein the drive assembly is disposed on the casing and is located at a side of the transmission mechanism. The drive assembly drives the transmission mechanism to move without increasing the height, which is beneficial to the miniaturization of the variable aperture device and the camera module.

Another advantage of the present invention is to provide a variable aperture device and a camera module with the variable aperture device, wherein the driving assembly includes a driving member, a movable part, a fixed part, and a restoring member, wherein the driving member can drive The movable part further drives the transmission mechanism to rotate relative to the base, and the restoring member can drive the movable part and then drive the transmission mechanism to return to its original position after the driving stops.

Another advantage of the present invention is to provide a variable aperture device and a camera module with the variable aperture device, wherein the driving member is an SMA wire, which simplifies the driving while meeting the rotation requirements of the transmission mechanism The structure of the component.

Another advantage of the present invention is to provide a variable aperture device and a camera module with the variable aperture device, wherein the driving member is a helical SMA wire and the bent SMA wire can increase the length of the SMA, increase the The active itinerary of the SMA line.

According to one aspect of the present invention, the variable aperture device of the present invention capable of achieving the aforementioned object and other objects and advantages includes:

case;

blade assembly;

A transmission mechanism, wherein the transmission mechanism is rotatably arranged on the housing, engages with the blade assembly, and drives the blade assembly through the transmission mechanism to form a light through hole with a variable aperture; and

A drive assembly, the drive assembly further includes a drive member and a return member, wherein the drive member and the return member are fixed to the housing and are rotatably connected to the transmission mechanism, wherein the drive member can A force for driving the transmission mechanism to rotate is provided, and the restoring member provides a force for reverse rotation to drive the transmission mechanism to rotate reciprocally through the driving member and the restoring mechanism.

According to a preferred embodiment of the present application, it further includes at least one movable part, wherein the at least one movable part is connected to the transmission mechanism, and the driving member and the restoring member of the driving assembly are telescopically connected on the at least one movable part.

According to a preferred embodiment of the present application, the driving member further includes a driving member trailing end and a driving member fixed end, the restoring member further includes a restoring member trailing end and a restoring member fixing end, the driving member fixed end and the The fixed end of the restoring member is fixed to the housing, the movable part is driveably connected to the trailing end of the driving member and the trailing end of the restoring member, and the trailing end of the driving member and the trailing member pull The end is located on the opposite side of the movable part, and the transmission mechanism is driven to rotate reciprocally by the driving member and the restoring member through the movable part.

According to a preferred embodiment of the present application, the driving member and the restoring member are fixed on the same side of the housing, and the trailing end of the driving member, the trailing end of the restoring member and the movable part are the same line.

According to a preferred embodiment of the present application, the driving member fixing end and the restoring member fixing end of the driving member are fixed on adjacent sides of the housing.

According to a preferred embodiment of the present application, it further includes a fixing part, wherein the fixing part is fixed to the housing, and the fixed end of the driving member and the fixing end of the restoring member are fixed to the fixed part by the fixing part. the housing.

According to a preferred embodiment of the present application, the fixed part includes a first fixed part and a second fixed part, wherein the driving member is telescopically arranged between the first fixed part and the movable part, The restoring member is telescopically disposed between the second fixed part and the movable part.

According to a preferred embodiment of the present application, the driving member is a straight SMA wire.

According to a preferred embodiment of the present application, the driving member further includes that the driving member includes at least one curved section and at least two straight sections integrally extending from the curved section.

According to a preferred embodiment of the present application, the driving member is a helical SMA wire.

According to a preferred embodiment of the present application, the restoring member is selected from a combination of elastic elements consisting of a spring and a shrapnel.

According to a preferred embodiment of the present application, the restoring member is an SMA wire.

According to a preferred embodiment of the present application, M is the shrinkage of the driving member, α is the rotation angle of the transmission mechanism, L is the distance from the axis O to the straight line where the driving member is located along the length direction, M>sinα *L.

According to a preferred embodiment of the present application, the housing includes a base and a cover fastened to the base, wherein the base further includes a base body and at least one winding post disposed on the base body, The at least one winding post is integrally formed on the base body, and the curved section is in contact with the winding post, and the two straight sections of the driving member are located on adjacent sides of the base.

According to a preferred embodiment of the present application, the transmission mechanism includes a transmission body and a moving end provided on the transmission body, wherein the moving end integrally extends outward from the outside of the transmission body, and the movement The end is drivingly connected with the movable part.

According to a preferred embodiment of the present application, the blade assembly includes a plurality of blade elements, wherein each blade element includes a blade body and a blade hub, wherein the blade body is connected to the blade hub, wherein the The transmission mechanism includes a transmission main body and a plurality of driving teeth, wherein the transmission main body is in an annular structure, and the plurality of driving teeth are arranged on the inside of the transmission main body, wherein the blade sleeve is connected to all the transmission mechanisms. mesh with the drive gear.

According to a preferred embodiment of the present application, the housing includes a cover and a base, wherein the base and the cover can be fastened together to form a receiving cavity, which is used to accommodate the The driving assembly, the blade assembly and the transmission mechanism, wherein the base includes a base body and a first protrusion and a second protrusion formed on the base body, and a first protrusion and a second protrusion formed on the base body The annular groove of the second protrusion, wherein the second protrusion includes a limiting protrusion and a plurality of shaft protrusions, and the blade sleeve is restricted by the shaft protrusions of the second protrusion, so The limit baffle set includes a first limit baffle and a second limit baffle, the first limit baffle and the second limit baffle form the limit groove, and the limit baffle The limit groove located in the limit baffle set.

According to a preferred embodiment of the present application, a cover plate is further included, and the cover plate is arranged between the cover body and the transmission mechanism.

According to a preferred embodiment of the present application, it further includes an electrical connection element, wherein the electrical connection element is disposed on the housing, and the electrical connection element is electrically connected to the driving assembly.

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

Photosensitive components;

a lens assembly held in the photosensitive path of the photosensitive assembly; and

The variable aperture device as described above, wherein the variable aperture device is arranged on the light incident side of the lens assembly.

Further objects and advantages of the invention will fully appear from an understanding of the ensuing description and accompanying drawings.

These and other objects, features and advantages of the present invention will be fully realized by the following detailed description and accompanying drawings.

Description of drawings

FIG. 1 is an exploded schematic view of a variable aperture device according to a first preferred embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a blade assembly of the variable aperture device according to the first preferred embodiment of the present invention.

Fig. 3 is a top view of the variable aperture device according to the first preferred embodiment of the present invention, which shows the meshing state of a transmission mechanism of the variable aperture device and the blade assembly.

Fig. 4 is a schematic diagram of the transmission mechanism of the variable aperture device according to the first preferred embodiment of the present invention.

Fig. 5 is a top view of the partial structure of the variable aperture device according to the above-mentioned first preferred embodiment of the present invention, which shows the connection state of a drive assembly and the transmission mechanism of the variable aperture device.

FIG. 6 is a schematic structural diagram of a casing of the variable aperture device according to the first preferred embodiment of the present invention.

Fig. 7 is a cross-sectional view of the three-dimensional structure of the variable aperture device according to the first preferred embodiment of the present invention.

8 is a side view of a base of the casing of the variable aperture device according to the first preferred embodiment of the present invention.

FIG. 9 is a cross-sectional view of the variable aperture device according to the first preferred embodiment of the present invention.

FIG. 10A and FIG. 10B are schematic diagrams of the movement state of the driving assembly of the variable aperture device according to the above-mentioned first preferred embodiment of the present invention.

11A and 11B are schematic diagrams of the variable aperture device at the initial position and the pulling position according to the above-mentioned first preferred embodiment of the present invention.

Fig. 12 is a schematic diagram of another optional implementation of a drive assembly of the variable aperture device according to the above-mentioned first preferred embodiment of the present invention.

13A and 13B are schematic diagrams of another optional implementation of a driving assembly of the variable aperture device according to the above-mentioned first preferred embodiment of the present invention.

14A and 14B are schematic diagrams of another optional implementation of a driving assembly of the variable aperture device according to the first preferred embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a camera module according to a preferred embodiment of the present invention.

Detailed ways

The following description serves to disclose the present invention to enable those skilled in the art to carry out the present invention. The preferred embodiments described below are only examples, and those skilled in the art can devise other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present invention.

Those skilled in the art should understand that in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, so the above terms should not be construed as limiting the present invention.

It can be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element The quantity can be multiple, and the term "a" cannot be understood as a limitation on the quantity.

Referring to FIGS. 1 to 12 of the accompanying drawings of the present invention, a variable aperture device and a camera module with a variable aperture device according to a first preferred embodiment of the present invention are illustrated in the following description. By adjusting the size of the iris aperture of the variable aperture device 100 to control the amount of incoming light of the camera module, the camera module has different depths of field and can realize remote shooting or portrait shooting.

Exemplary variable aperture device 100

As shown in FIG. 1 , the present application discloses a variable aperture device 100, including a housing 10, a drive assembly 20, a blade assembly 30, and a transmission mechanism 40, wherein the transmission mechanism 40 is movably connected to the drive assembly. 20 on the blade assembly 30 , that is, the transmission mechanism 40 can be driven by the drive assembly 20 and drive the blade assembly 30 to move. The casing 10 is installed on other structures of the camera module, wherein the driving assembly 20 , the blade assembly 30 and the transmission mechanism 40 are accommodated in the casing 10 . The drive assembly 20 is adjacent to the transmission mechanism 40 and is arranged on the peripheral side of the transmission mechanism 40. The drive assembly 20 can drive the transmission mechanism 40 so that the transmission mechanism 40 is relatively The body 10 rotates. The blade assembly 30 is engaged with the transmission mechanism 40 , and the blade assembly 30 is driven by the transmission mechanism 40 to realize a rotational movement, thereby changing the size of the aperture of the variable aperture device 100 . The blade assembly 30 is connected to the transmission mechanism 40 , wherein the blade assembly 30 can be driven by the transmission mechanism 40 and forms a light aperture 301 with a variable aperture. It can be understood that, in this preferred embodiment of the present application, the size of the light aperture 301 of the blade assembly 30 determines the aperture of the iris device.

As shown in Figures 2 to 3, in the embodiment of the present application, the blade assembly 30 includes a plurality of blade elements 31, wherein each blade element 31 includes a blade body 311 and a blade hub 312, wherein the blade body 311 is connected to the blade bushing 312 , and the blade bushing 312 of each blade element 31 is connected to the transmission mechanism 40 in a driveable manner. In a specific example of the present application, the number of the blade elements 31 is eight, and the number of the blade main bodies 311 and the blade sleeves 312 is also eight.

Specifically, in the embodiment of the present application, a plurality of the blade bodies 311 are distributed in a ring shape, and there is overlap between adjacent blade bodies 311, so that a plurality of blade bodies 311 are formed between the plurality of blade bodies 311 for light The light through hole 301 passing through. In the present application, one of the plurality of blade bodies 311 is located above or below the previous blade body 311 (in a counterclockwise direction). Specifically, in a specific example of the present application, one of the plurality of blade bodies 311 is located above the previous blade body 311 and below the subsequent blade body 311 . In another specific example of the present application, one of the plurality of blade bodies 311 is located below the previous blade body 311 and above the subsequent blade body 311 . In another specific example of the present application, one of the plurality of blade bodies 311 is located below the previous blade body 311 and the subsequent blade body 311 . In another specific example of the present application, one of the plurality of blade bodies 311 is located above the previous blade body 311 and the subsequent blade body 311 . That is to say, a plurality of the blade main bodies 311 may be arranged overlappingly along the same direction, or may be arranged alternately high and low along the same direction.

It is worth mentioning that, in the embodiment of the present application, a plurality of the blade bodies 311 overlap each other to form an approximately circular aperture, that is, when the plurality of blade bodies 311 are closed, the gap between two adjacent blades is avoided. A polygonal opening is formed between inner sidewalls of the main body 311 , thereby preventing stray light from entering the variable aperture device 100 through the polygonal opening. Further, in an embodiment of the present application, the number of the blade main bodies 311 is an odd number, which can avoid the above-mentioned polygonal opening, and can also use a small number of the blade main bodies 311 to form a larger aperture. In another embodiment of the present application, the number of the vane main bodies 311 is an even number, and the vane main bodies 311 are arranged symmetrically along the center of the aperture, so as to avoid the above-mentioned multi-deformation openings.

As shown in Figures 6 to 9, in the embodiment of the present application, the housing 10 includes a cover 11 and a base 12, wherein the base 12 and the cover 11 can be interlocked to form a A housing chamber, the housing chamber is used to accommodate the driving assembly 20, the blade assembly 30, and the transmission mechanism 40, in this way, not only can protect each element in the variable aperture device 100, but also can It is used to prevent dust, dirt, etc. from entering the inside of the iris device 100 .

Specifically, in the embodiment of the present application, the cover body 11 is sleeved above the base 12, the cover body 11 is located on the light incident side, and the base 12 is located on the light exit side. Further, an opening is provided in the middle of the cover 11 , and correspondingly, an opening is also provided in the middle of the base 12 , and the two openings of the cover 11 and the base 12 have the same size and correspond up and down. The opening of the cover 11 and the opening of the base 12 form a housing through hole of the housing 10 , so that light reflected by objects can pass through the housing through hole. In a specific example of the present application, the openings of the cover 11 and the base 12 are circular, and the present application does not limit the shapes of the openings of the cover 11 and the base 12 . In a specific example of the present application, the base 12 is a quadrilateral when viewed on a plane along one side of the axis O, and includes a first side, a second side, a third side and a fourth side in a clockwise direction. The side is located on the first side, the second side is located on the second side, the third side is located on the third side, the fourth side is located on the fourth side, the first side and the third side are parallel to each other, and the second side and the fourth side are parallel to each other.

Specifically, in the embodiment of the present application, the base 12 further includes a base main body 121 . In a specific example of the present application, the opening of the base 12 is located on the base body 121 . Further, the base 12 further includes a first protrusion 122, a second protrusion 123 and an annular groove 124, and the first protrusion 122, the second protrusion 123 and the annular groove 124 respectively surround the opening of the base 12, that is, the cross-sections of the first protrusion 122, the second protrusion 123 and the annular groove 124 are annular, and the annular groove 124 is disposed on the Between the first protruding portion 122 and the second protruding portion 123, wherein, the opening of the base 12, the first protruding portion 122, the second protruding portion 123 and the annular groove 124 The centers of the circles coincide. In a specific example of the present application, the base 12 is equivalent to one of the fixing parts 23, the driving assembly 20, the blade assembly 30 and the transmission mechanism 40 are arranged on the base 12, and through the base 12 supports each element in the variable aperture device 100 .

More specifically, in the embodiment of the present application, the second protrusion 123 of the base 12 includes a limiting protrusion 1231 and a plurality of axial protrusions 1232, and the limiting protrusion 1231 and the axial protrusions 1232 are The second protrusion 123 extends upwards, the top surface of the limiting protrusion 1231 is higher than the top surface of the second protrusion 123 , the top surface of the shaft protrusion 1232 is higher than the second protrusion 123 top surface. The number of the limiting protrusion 1231 is at least one, and the number of the shaft protrusions 1232 is the same as the number of the blade elements 31 , which is multiple. In a specific example of the present application, the number of the limiting protrusion 1231 is different from that of the shaft protrusion 1232 and the number of the limiting protrusion 1231 is less than the number of the shaft protrusion 1232, and the number of the limiting protrusion 1231 is set between the two shaft protrusions 1232 . In another specific example of the present application, the number of the limiting protrusions 1231 and the shaft protrusions 1232 is the same, and the limiting protrusions 1231 and the shaft protrusions 1232 are along the circumferential direction of the second protrusion 123 Alternate the settings one by one. Further, in a specific example of the present application, the limiting protrusion 1231 and the shaft protrusion 1232 integrally extend upward from the second protrusion 123 . In another specific example of the present application, the limiting protrusion 1231 and the shaft protrusion 1232 may also be molded on the second protrusion 123 by secondary injection molding. In another specific example of the present application, the limiting protrusion 1231 and the shaft protrusion 1232 may also be fixed on the top surface of the second protrusion 123 by pasting or welding.

Specifically, in the embodiment of the present application, the blade bushing 312 includes a bushing main body 3121 , a driven tooth 3122 and a bushing connecting end 3123 , and the bushing connecting end 3123 is arranged at one end of the bushing main body 3121 , the driven tooth 3122 is disposed at the other end of the sleeve body 3121 . The blade bushing 312 is fixedly connected to the blade main body 311 through the bushing connecting end 3123 . In a specific example of the present application, the sleeve connection end 3123 of the blade sleeve 312 is fixed to the blade main body 311 by glue. In another specific example of the present application, the blade bushing 312 is integrally formed with the blade main body 311 . Further, the blade bushing 312 may be disposed on the bottom surface of the blade main body 311 . It can be understood that the blade bushing 312 may also be disposed on the top surface of the blade body 311 , which is not limited in the present application. In the present application, the sleeve body 3121 is provided with a positioning hole, the positioning hole extends from the top of the sleeve body 3121 to the bottom surface of the sleeve body 3121, the positioning hole and the base 12 The shaft protrusion 1232 is movably connected so that the sleeve body 3121 is positioned on the shaft protrusion 1232 of the base 12 and rotates around the shaft protrusion 1232 . In the present application, the driven teeth 3122 include at least two driven teeth 31221, the driven tooth grooves 31220 are formed between the two driven teeth 31221, and the number of the driven tooth grooves 31220 There is at least one driven gear tooth 31221 extending outward from the bushing main body 3121, and the driven gear tooth 31221 is engaged with the driving tooth 42 of the blade movable carrier, so that the blade bushing 312 is Driven by the transmission mechanism 40, it rotates. In a specific example of the present application, the number of the driven gear teeth 31221 is four, and the number of the driven tooth slots 31220 is three.

More specifically, in the embodiment of the present application, the blade main body 311 is fixedly connected to the blade hub 312, the rotation of the blade hub 312 controls the opening and closing of the blade main body 311, and adjusts the light transmission. Aperture size of hole 301 . In a specific example of the present application, the blade bushing 312 is driven by the transmission mechanism 40 to rotate in one direction (clockwise), and the blade main body 311 is opened as the blade bushing 312 moves, so The diameter of the light through hole 301 becomes larger. In another example of the present application, the blade bushing 312 rotates in the opposite direction (counterclockwise) driven by the transmission mechanism 40, and the blade main body 311 is closed as the blade bushing 312 moves, so The diameter of the light through hole 301 becomes smaller. It can be understood that the vane bushing 312 can control the continuous movement of the vane main body 311 to realize the continuous change of the diameter of the light through hole 301 .

As shown in FIGS. 1 to 3 , in the embodiment of the present application, the transmission mechanism 40 includes a transmission body 41 , a plurality of driving teeth 42 and at least one limit baffle set 43 .

Specifically, in a specific example of the present application, a section of the transmission body 41 is circular, that is, the outer edge of the movable carrier is circular, the inner edge of the movable carrier is circular, and each of the driving teeth 42 And the limiting baffle set 43 extends inwardly from the inner edge of the transmission body 41 , that is, the driving teeth 42 and the limiting baffle set 43 are disposed in the through holes. In this application, inward refers to the side facing the axis O of the transmission body 41, and outward refers to the side away from the axis O of the transmission body 41. The axis O of the transmission body 41 passes through the transmission body 41. The center of the center and the plane where the transmission main body 41 is located are perpendicular to each other.

Specifically, in the embodiment of the present application, the blade elements 31 of the blade assembly 30 mesh with the driving teeth 42 of the transmission mechanism 40, and the number of the driving teeth 42 is the same as that of the blade elements 31 , that is, the transmission mechanism 40 includes a plurality of the driving teeth 42 . In a specific example of the present application, the number of the driving teeth 42 is eight. Further, each of the driving teeth 42 includes at least one driving gear tooth 421, the driving gear tooth 421 extends inwardly from the inner edge of the transmission body 41, and at least one driving gear tooth 421 surrounds the The inner edge of the transmission main body 41 is set. Further, the driving gear teeth 421 are arranged along the radial direction of the transmission main body 41 . In a specific example of the present application, the driving gear teeth 421 are integrally formed with the transmission main body 41 . In another specific example of the present application, the driving gear teeth 421 are adhesively fixed to the transmission body 41 , which is not limited in the present application.

It is worth mentioning that, in the embodiment of the present application, the driving gear teeth 421 mesh with at least two driven gear teeth 31221 to transmit the rotation of the transmission mechanism 40 to the blade assembly 30, thereby driving The rotation of the blade bushing 312 realizes the opening and closing of the blade main body 311 . In the present application, the number of the driven gear teeth 31221 is N, and the number of the driving gear teeth 421 is M, and the relationship between the two is: M≥N-1. In a specific example of the present application, the number of the driven gear teeth 31221 is four, and the number of the driving gear teeth 421 is greater than or equal to three.

Specifically, in the embodiment of the present application, the limiting baffle group 43 includes a first limiting baffle 431 and a second limiting baffle 432, and the first limiting baffle 431 and the second limiting baffle The limit baffle 432 extends inwardly from the inner edge of the transmission body 41 , and the first limit baffle 431 and the second limit baffle 432 are arranged along the radial direction of the transmission body 41 . Further, the number of the limiting baffle group 43 is at least one, the first limiting baffle 431 and the second limiting baffle 432 form the limiting groove 433, and the limiting groove 433 The opening is towards the axis O. In a specific example of the present application, the limiting protrusion 1231 of the base 12 is placed in the limiting groove 433 from bottom to top, and when the transmission mechanism 40 is relative to the base 12 of the drive housing, When rotating and moving, the first limiting baffle 431 and the second limiting baffle 432 will collide with the limiting protrusion 1231 of the base 12 to adjust the rotation angle of the transmission mechanism 40 Limit. Further, the length of the first limiting baffle 431 and the second limiting baffle 432 in the radial direction is greater than or equal to the length of the limiting protrusion 1231 in the radial direction, so as to avoid the first The limiting baffle 431 and the second limiting baffle 432 can break out of the limitation of the limiting protrusion 1231 . Specifically, looking at the surface along one side of the axis O, the first limit baffle 431 and the second limit baffle 432 form an angle θ with the axis O, and in a specific example of the present application, the angle θ is 3°. That is to say, the rotatable angle of the transmission mechanism 40 is 3°, and when the transmission mechanism 40 rotates 3°, the first limiting baffle 431 or the second limiting baffle 432 will be in contact with the The limiting protrusion 1231 of the base 12 collides to prevent further rotation of the transmission mechanism 40 .

More specifically, in the embodiment of the present application, the driving teeth 42 are arranged adjacent to the limiting baffle group 43 , and further, the limiting baffle group 43 is arranged between the two driving teeth 42 . Further, the number of the limiting baffle groups 43 is less than or equal to the number of the driving teeth 42 . In a specific example of the present application, the number of the limit baffle set 43 is smaller than the number of the drive teeth 42, and the limit baffle set 43 is arranged between the two drive teeth 42 to control the The rotation of the transmission mechanism 40 is limited; in another specific example of the present application, the number of the limit baffle set 43 is equal to the number of the drive teeth 42, and the limit baffle set 43 and the drive The teeth 42 are arranged alternately along the circumference of the carrier body of the transmission mechanism 40 . This arrangement makes the driving teeth 42 also be arranged in the limiting slots 433 of the limiting baffle set 43 . For example, in a specific example of the present application, the limit baffle set 43 includes a first set of limit baffle sets 43 and a second set of limit baffle sets 43, and one of the base 12 The limiting protrusion 1231 is arranged in the first group of limiting baffles 43, and the other limiting protrusion 1231 of the base 12 is arranged in the second group of limiting baffles 43. Inside, the driving teeth 42 are placed between one of the limiting protrusions 1231 and the other limiting protrusions 1231, that is, the driving teeth 42 are arranged in the first group of the limiting baffles The first limit baffle 431 or the second limit baffle 432 of 43 and the first limit baffle 431 or the second limit baffle 431 of the second set of limit baffles 43 Between the baffles 432 .

It is worth mentioning that, in the embodiment of the present application, the corresponding radian angle of the driving tooth 42 is greater than the corresponding radian angle of the limiting groove 433 . When the transmission mechanism 40 is rotating, the driving gear teeth 421 and the driven teeth 3122 mesh with each other so that the blade assembly 30 is driven by the transmission mechanism 40 to rotate. During this process, the The sleeve main body 3121 of the blade sleeve 312 will not collide with the first limiting baffle 431 or the second limiting baffle 432 , so as to avoid interference to the rotation of the blade assembly 30 .

As shown in FIG. 3 , the vane assembly 30 is disposed inside the transmission mechanism 40 , and the vane assembly 30 is movably placed through the engagement between the driving gear teeth 421 and the driven teeth 3122 on the inner side of the transmission mechanism 40 . In a specific example of the present application, the rotatable angle of the transmission mechanism 40 is 3°, and the rotatable angle of the blade assembly 30 driven by the transmission mechanism 40 is 16.5°. This is because the transmission mechanism 40 rotates around the axis O, the blade assembly 30 rotates around the shaft protrusion 1232, the rotation radius of the transmission mechanism 40 is greater than the rotation radius of the blade assembly 30, and when the transmission mechanism 40 rotates at a smaller angle, the The blade assembly 30 will rotate through a relatively large angle.

Further, in the embodiment of the present application, the height of the blade assembly 30 does not exceed the height of the transmission mechanism 40 , so as to prevent the blades of the blade assembly 30 from contacting the drive housing during the rotation of the variable aperture device 100 . body friction. Furthermore, increasing the height of the variable aperture device 100 can also be avoided, so as to meet the demand for miniaturization of the camera module.

It is worth mentioning that, in the embodiment of the present application, the limit protrusion 1231 is extended upwards and installed in the limit baffle group 43 of the transmission mechanism 40 , when the transmission mechanism 40 is relatively When the base 12 rotates, the limiting protrusion 1231 contacts the first limiting baffle 431 or the second limiting baffle 432 of the limiting baffle set 43 , so that the transmission mechanism 40 The movement is limited. Further, the limiting protrusions 1231 are arranged along the circumference of the second protrusion 123 and are located on the same circumference. The shaft protrusion 1232 extends upwards and is disposed in the positioning hole of the vane hub 312 , and when the vane assembly 30 rotates relative to the base 12 , the vane hub 312 rotates around the shaft protrusion 1232 . Further, the shaft protrusions 1232 are arranged along the circumference of the second protrusion 123 and are located on the same circumference. In a specific example of the present application, the shaft protrusion 1232 is located on the inner side of the limiting protrusion 1231, that is, the shaft protrusion 1232 is disposed on a side closer to the axis O, so as to be disposed on the side with the blade assembly 30. The inner side of the transmission mechanism 40 is suitable. Furthermore, the height of the shaft protrusion 1232 is not higher than the height of the limiting protrusion 1231, that is, the upper surface of the shaft protrusion 1232 is lower than the upper surface of the limiting protrusion 1231, or, the The upper surface of the shaft protrusion 1232 is flat with the upper surface of the limiting protrusion 1231 , so as to prevent the height of the variable aperture device 100 from increasing. In a specific example of the present application, the position-limiting protrusion 1231 is a square structure, and the shaft protrusion 1232 is a cylinder. Of course, the position-limiting protrusion 1231 and the shaft protrusion 1232 can also be in other shapes. There is no restriction on this.

Specifically, in an embodiment of the present application, the blade bushing 312 of the blade assembly 30 is positioned on the top surface of the second protrusion 123 through the positioning of the shaft protrusion 1232 , and the blade assembly 30 The blade main body 311 is arranged on the top surface of the first protrusion 122, and the blade sleeve 312 is driven by the transmission mechanism 40 to rotate around the axis O so as to realize the opening and closing of the blade main body 311. During this process, the blade sleeve 312 is in frictional contact with the top surface of the second protrusion 123 , and the blade main body 311 is in frictional contact with the top surface of the first protrusion 122 . Therefore, in the present application, the annular groove 124 is disposed between the first protrusion 122 and the second protrusion 123, and the setting of the annular groove 124 reduces the first The areas of the top surfaces of the convex portion 122 and the second convex portion 123 further reduce the frictional force between the blade element 31 and the first convex portion 122 and the second convex portion 123 . Furthermore, dust-catching glue is arranged in the annular groove 124, so that impurities such as dust and particles in the variable aperture device 100 fall onto the dust-catching glue, preventing dust, particles and other impurities from entering the camera module.

Specifically, in an embodiment of the present application, the base 12 further includes a track 125, the track 125 is arranged outside the second protrusion 123 of the base body 121, and the track 125 surrounds the The opening of the base 12 , the track 125 coincides with the center of the opening of the base 12 . Further, the outer wall of the transmission mechanism 40 is integrally extended downward from the transmission main body 41 to form an annular extension leg 45 , and the extension leg 45 of the transmission mechanism 40 is arranged on the bottom of the base 12 . Inside the track 125 , so that the transmission mechanism 40 can only rotate in the track 125 , thereby limiting the translation or tilt of the transmission mechanism 40 . Of course, in other examples of the present application, the above-mentioned functions may also be realized through other structural pairs. For example, in a specific example of the present application, the top surface of the base 12 extends upwards along the circumference of the maximum outer diameter of the transmission mechanism 40 with a plurality of limit posts 126, and the limit posts 126 pass through an integrated The base body 121 is fixed to the base body 121 by molding or bonding. The outer wall of the transmission mechanism 40 is in contact with the limit column 126 , thereby limiting the translation or inclination of the transmission mechanism 40 .

It can be understood that, in the embodiment of the present application, the transmission mechanism 40 and the blade assembly 30 are arranged above the base 12, that is, the transmission mechanism 40 and the blade assembly 30 are connected through the base 12. support. The drive assembly 20 drives the transmission mechanism 40 to rotate relative to the base 12 around the axis O, the blade assembly 30 is arranged inside the transmission mechanism 40, and passes through the driven teeth 3122 and the drive The meshing of the gear teeth 421 further drives the blade bushing 312 to rotate, and drives the blade main body 311 to open and close, so as to realize the change of the aperture of the aperture. It can also be said that the transmission mechanism 40 is a driving part, the blade assembly 30 is a driven part, and the driving assembly 20 drives the driving part to rotate, and then drives the driven part to rotate.

As shown in Figures 5 to 12, in the embodiment of the present application, the drive assembly 20 includes a drive member 21 and a return member 22, wherein one end of the drive member 21 and the return member 22 is fixed to the housing body 10, and the other end of the drive member 21 and the return member 22 is driveably connected to the transmission mechanism 40, and the drive member 21 and the return member 22 drive the transmission mechanism 40 to move reciprocally . The driving member 21 and the restoring member 22 provide driving force opposite to each other for the transmission mechanism 40 . As an example, in this preferred embodiment of the present application, the drive member 21 is connected to the transmission mechanism 40, and the drive member 21 drives the transmission mechanism 40 to rotate clockwise (counterclockwise); The return member 22 is connected with the transmission mechanism 40, and the transmission mechanism 40 is driven by the return member 22 to rotate counterclockwise (clockwise), so that the transmission mechanism 40 is connected between the drive member and the return member 22 It rotates reciprocally under the driving action.

The drive assembly 20 further includes at least one movable part 24, wherein the at least one movable part 24 is connected to the transmission mechanism 40, and the at least one movable part 24 is arranged on the outside of the transmission member 40, by which The movable part 24 drives the transmission mechanism 40 to move. The movable part 24 of the drive assembly 20 is connected to the drive member 21 and the return member 22 in a transmission manner, and the drive member 21 and the return member 22 drive the drive member 21 and the return member 22 through the movable part 24 . The transmission mechanism 40 moves. It is worth mentioning that, in this preferred embodiment of the present application, the movable part 24 is arranged outside the transmission mechanism 40 and connected with the transmission mechanism 40 .

It can be understood that, in this preferred embodiment of the present application, the number of the movable parts 24 can be one, two or more. As an example, in this preferred embodiment of the present application, the number of the movable part 24 is one, wherein the driving member 21 and the restoring member 22 of the driving assembly 20 are connected to the movable part 24, Moreover, the driving member 21 and the restoring member 22 are located on opposite sides of the movable part 24 , and the driving member 21 and the restoring member 22 provide driving forces opposite to each other for the movable part 24 .

Optionally, in other optional embodiments of the present application, the number of the movable parts 24 is two, that is, the driving assembly 20 includes two movable parts 24 . As an example, in this preferred embodiment of the present application, the two moving parts 24 are arranged on the outside of the transmission mechanism 40 at intervals from each other. Preferably, the two moving parts 24 are symmetrically distributed on both sides of the transmission mechanism 40, wherein the driving member 21 is connected to one of the moving parts 24, and the restoring member 22 is connected to the other The movable part 24 described above is connected. It can be understood that, in this preferred embodiment of the present application, the driving member 21 and the restoring member 22 are fixed on two opposite sides of the housing 10 . It can be understood that, the driving member 21 and the restoring member 22 provide opposite driving forces for the transmission mechanism 40 on opposite sides of the housing 10, so as to drive the transmission mechanism 40 to rotate reciprocally. .

Those skilled in the art can understand that, in other optional embodiments of the present application, the number of the movable parts 24 is merely an example, not a limitation.

The drive assembly 20 is connected to the transmission mechanism 40 in a driving manner, and the transmission mechanism 40 is driven by the drive assembly 20 to move back and forth, so that the transmission mechanism 40 drives the blade assembly 30 connected thereto to move. The fixing part 23 includes a first fixing part 231 and a second fixing part 232 , and the first fixing part 231 and the second fixing part 232 of the fixing part 23 are fixed to the base 12 . The driving member 21 is telescopically arranged between the first fixed part 231 and the movable part 24, and the restoring member 22 is telescopically arranged between the second fixed part 232 and the movable part. Between 24. In an initial state, the movable part 24 is co-acted by the driving member 21 and the restoring member 22 and is in a state of force balance. As an example, in this preferred embodiment of the present application, the driving member 21 and the restoring member 22 are in a stretched state of mutual traction, wherein the movable part 24 is positioned between the driving member 21 and the restoring member. 22 maintain balance under mutual traction. Therefore, when the driving member 21 pulls the moving part 24 to move, the restoring member 22 is stretched by the moving part 24 to generate a force opposite to the driving member 21 .

The driving member 21 further includes a driving member trailing end 212 and a driving member fixed end 213, wherein the driving member trailing end 212 of the driving member 21 is connected to the movable part 24, and the driving member fixed end 213 is fixed on the first fixing portion 231 . The recovery member 22 further includes a recovery member pulling end 222 and a recovery member fixed end 223, wherein the recovery member pulling end 222 of the recovery member 22 is connected to the movable part 24, and the recovery member fixed end 223 is fixed on the second fixing portion 232 . Therefore, in this preferred embodiment of the present application, the driving member trailing end 212 of the driving member 21 and the restoring member trailing end 222 of the restoring member 22 are located on opposite sides of the movable part 24, at In a balanced state, mutually balanced forces are exerted on the movable part 24 by the driving member trailing end 212 of the driving member 21 and the restoring member trailing end 222 of the restoring member 22 . Preferably, in this preferred embodiment of the present application, the driving member trailing end 212 of the driving member 21 and the restoring member trailing end 222 of the restoring member 22 are arranged on the movable part 24 opposite to each other. opposite sides of the drive member 21 so as to apply opposing and mutually balanced forces to the movable part 24 through the driving member trailing end 212 of the driving member 21 and the restoring member trailing end 222 of the restoring member 22 . It can be understood that, in this application, the opposite sides of the movable part 24 may be two opposite side faces of the movable part, or two symmetrically distributed end faces, etc. of the movable part.

In the present application, the transmission mechanism 40 further includes a moving end 44, the moving end 44 extends outward from the outer edge of the transmission body 41, and the moving end 44 can be integrally formed on the transmission body 41, or Bonded to the transmission main body 41 . The moving end 44 of the transmission mechanism 40 is fixedly connected with the movable part 24 of the driving assembly 20 so as to drive the transmission mechanism 40 to rotate and move through the movable part 24 . In the present application, both the drive assembly 20 and the transmission mechanism 40 are disposed on the base 12 of the housing 10, wherein the drive assembly 20 is fixed to the base 12 through the fixing portion 23, so The transmission mechanism 40 is movably coupled to the base 12 . The transmission mechanism 40 is connected to the movable part 24 of the driving assembly 20 , and the transmission mechanism 40 can rotate relative to the base 12 driven by the movable part 24 .

In an embodiment of the present application, the driving member 21 can drive the movable part 24 to drive the transmission mechanism 40 to rotate relative to the base 12 . The driving member 21 may be a driving motor of a voice coil motor, a piezoelectric motor, an SMA (Shape Memory Alloy) motor or the like. Shape memory alloy is an alloy material that can completely eliminate its deformation at a lower temperature after heating up and restore its original shape before deformation. For example, when the shape memory alloy undergoes a limited plastic deformation at a temperature lower than the phase transformation state, it can be restored to its original shape before deformation by heating. Among them, it can be realized by energizing the SMA wire SMA wire heating. In a specific example of the present application, the driving member 21 is an SMA wire, and the heat generated when electrified increases the temperature of the SMA wire, thereby causing the SMA wire to shrink. In a specific example of the present application, the driving member 21 is a straight SMA wire. In another specific example of the present application, the driving member 21 is a helical SMA wire, and the helical SMA wire can increase its total length and increase its shrinkage when heated. In another embodiment of the present application, the driving member 21 is an SMA wire with at least one curved section, which can increase the total length of the SMA wire and also increase the movable stroke of the SMA wire.

In the embodiment of the present application, the restoring member 22 can drive the movable part 24 and then drive the transmission mechanism 40 to return to the original position after the driving stops. The restoring member 22 has certain elasticity. In a specific example of the present application, the restoring member 22 is an elastic member such as a spring or a shrapnel. In another specific example of the present application, the restoring member 22 is an SMA wire, and its structure may be the same as that of the driving member 21 or may be different from that of the driving member 21 .

Preferably, the driving member 21 and the moving part 24 of the returning member 22 are connected to the transmission mechanism 40, wherein the moving part 24, at least a part of the driving member 21, and the returning member 22 At least a part is located on the same straight line. That is to say, in the present application, the movable part 24, at least a part of the driving member 21 and at least a part of the restoring member 22 are arranged on the same side of the base 12, and the driving member 21 At least a part, at least a part of the recovery member 22 extends along the direction of the side of the base 12 . Further, the straight line where at least a part of the driving member 21 is located coincides with the straight line where at least a part of the restoring member 22 is located, and the movable part 24 is arranged between the driving member 21 and the restoring member 22, The three are on the same straight line.

Specifically, in the embodiment of the present application, the first fixing part 231 , the second fixing part 232 and the movable part 24 are disposed on the same side of the base 12 . For example, in a specific example of the present application, the first fixing part 231 is arranged at a corner of the base 12, and the second fixing part 232 is arranged at an adjacent corner of the base 12; or the first The two fixing portions 232 are disposed on the same side of the base 12 . In another specific example of the present application, the first fixing part 231 is arranged at one side of the base 12, and the second fixing part 232 is arranged at the same side, or the second fixing part 232 set at the corner of the side. The movable part 24 is disposed between the first fixed part 231 and the second fixed part 232, one end of the movable part 24 is connected to the driving member trailing end 212 of the driving member 21, the The other end of the movable part 24 is connected to the pulling end 222 of the restoring member 22, the fixed end 213 of the driving member 21 is connected to the first fixing portion 231, and the restoring member 22 The fixing end 223 of the restoring member is connected to the second fixing portion 232 . That is, the driving member 21 is disposed opposite to the restoring member 22 along two opposite sides of the movable part 24 . In a specific example of the present application, the fixed part 23 and the movable part 24 are clamping pieces, which are respectively clamped and connected with the driving member 21 and the restoring member 22 . In another specific example of the present application, the fixed part 23 and the movable part 24 are fixed protrusions, which are wound and connected with the driving member 21 and the restoring member 22 respectively, which is not limited in the present application.

As an example, in one embodiment of the present application, the driving member 21 and the restoring member 22 are arranged on the same side along the same direction, that is, the straight line along the length direction of the driving member 21 and the restoring member 22 is aligned with the The outer diameter of the transmission mechanism 40 is tangential.

As shown in FIG. 12 , in one embodiment of the present application, the driving member 21 is an SMA wire, the restoring member 22 is a spring, and the driving member fixed end 213 of the driving member 21 is connected to the first The fixing part 231, and the SMA wire is fixed on the base 12 through the first fixing part 231, the driving member pulling end 212 of the driving member 21 is connected to the movable part 24, and the restoring member 22 The fixing end 223 of the restoring member is connected to the second fixing portion 232, and the restoring member 22 is fixed to the base 12 through the second fixing portion 232, and the restoring member of the restoring member 22 pulls End 222 is connected to said movable part 24 . After electrification, the SMA wire is heated and shrinks, and the SMA wire provides a positive torque to the transmission mechanism 40 to drive the transmission mechanism 40 to rotate. Specifically, the SMA wire generates a force along a straight line to drive the moving part 24 to move, because the sleeve connecting end 3123 of the transmission mechanism 40 connected to the moving part 24 is limited by the track 125 to only Rotating around the axis O, so the movable part 24 generates a rotating motion driven by a force along the linear direction, and then drives the transmission mechanism 40 to rotate.

In other words, after the SMA wire shrinks, the spring is stretched, the length of the line segment of the SMA wire decreases, and the length of the spring line segment elongates. angle. When the energization is stopped or the energizing current is reduced, the spring provides a reverse torque opposite to the forward torque to the transmission mechanism 40 to drive the transmission mechanism 40 to reversely rotate to return to the initial position. In the present application, in the initial state, the intersection point of the line connecting the end point of the movable part 24 and the center of the transmission mechanism 40 and the outer wall of the transmission mechanism 40 with the SMA line is A; Shrink by heat, drive the transmission mechanism 40 to rotate, the intersection of the line connecting the end point of the movable part 24 and the center of the transmission mechanism 40 with the SMA line and the outer wall of the transmission mechanism 40 is B; A, B and The angle formed by the line connecting the centers of the circles is the rotation angle θ of the transmission mechanism 40 .

As shown in Figures 10A to 11B, in another embodiment of the present application, the driving member 21 is a first SMA wire 211, the restoring member 22 is a second SMA wire 221, and the first SMA wire 211 One end is connected to the first fixing portion 231 , and the first SMA wire 211 is fixed to the base 12 through the first fixing portion 231 . The other end of the first SMA wire 211 is connected to the movable part 24, one end of the second SMA wire 221 is connected to the second fixed part 232, and the second fixed part 232 makes the first Two SMA wires 221 are fixed on the base 12 , and the other end of the second SMA wire 221 is connected to the movable part 24 . In an initial state, the straight lines along the length direction of the first SMA wire 211 and the second SMA wire 221 coincide with each other. After electrification, the first SMA wire 211 is heated and shrinks, and the first SMA wire 211 provides a positive torque to the transmission mechanism 40 to drive the transmission mechanism 40 to rotate. Specifically, the first SMA wire 211 generates a force along a straight line to drive the moving part 24 to move, because the sleeve connecting end 3123 of the transmission mechanism 40 connected to the moving part 24 is moved by the track 125 is limited to rotational movement about axis O only. Therefore, the movable part 24 generates a rotational motion driven by a force along the linear direction, and then drives the transmission mechanism 40 to rotate. In other words, after the first SMA wire 211 shrinks, the second SMA wire 221 is stretched, the segment length of the first SMA wire 211 is reduced, and the segment length of the second SMA wire 221 is extended. Long, the straight line along the length direction of the first SMA wire 211 does not coincide with the straight line along the length direction of the second SMA wire 221 , and forms a certain angle. Stop energizing the first SMA wire 211 or reduce the current energizing the first SMA wire 211, then energize the second SMA wire 221, the second SMA wire 221 shrinks when heated, and the second SMA wire 211 The wire 221 provides a reverse torque opposite to the forward torque to the transmission mechanism 40 to drive the transmission mechanism 40 to reversely rotate to return to the initial position.

It is worth mentioning that, in the embodiment of the present application, M>sinα*L, wherein M is the contraction amount of the driving member 21, α is the rotation angle of the transmission mechanism 40, and L is the axis O to the driving The distance of the straight line where the member 21 is located along the length direction. For example, in a specific example of the present application, when the rotation angle α of the transmission mechanism 40 is 0-3°, the distance L from the axis O to the straight line where the driving member 21 is located along the length direction is in the range of 4.6mm-6.6mm, The shrinkage M of the driving member 21 is greater than 0.24 mm, and the total length of the driving member 21 is 4.8 mm˜8 mm. In a specific example of the present application, the rotation angle α of the transmission mechanism 40 is 3°, the distance L from the axis O to the straight line where the driving member 21 is located along the length direction is 5.4 mm, and the contraction amount M of the driving member 21 is is greater than 0.3mm. In a specific example of the present application, the driving member 21 is an SMA wire, the restoring member 22 is a spring, the shrinkage M of the driving member 21 is greater than 0.28 mm, and the total length of the driving member 21 is 5.6 mm -9.3mm. In the present application, the contraction amount M of the driving member 21 is the moving stroke of the driving member 21 along the linear direction where it is located.

As shown in FIG. 13A and FIG. 13B , in another embodiment of the present application, the driving member 21 is an SMA wire with a bent structure, wherein the driving member 21 includes at least one bending section 214 and from the bending section 214 integrally extending at least two straight sections 215 , wherein the driving member fixed end 213 and the driving member trailing end 212 of the driving member 21 are located on the straight section 214 of the driving member.

The curved section 214 is connected between at least two straight sections 215, the curved section 214 of the driving member 21 is located at a corner of the base 12, and at least two of the straight sections of the driving member 21 are The segments 215 respectively extend along the directions of two sides perpendicular to each other of the base 12 . In a specific example of the present application, at least one winding post 127 is provided at a corner of the base 12, and the number of the winding posts 127 is the same as the number of the bending sections 214 of the driving member 21, the The curved section 214 of the driving member 21 is in contact with the winding post 127 . It can be understood that, in this preferred embodiment of the present application, the driving member 21 is inserted and wound around the winding post 127 , and forms the bending section 214 at a position in contact with the winding post 127 .

In the present application, the more the number of the curved sections 214 of the driving member 21 is, the longer the total length of the driving member 21 is, and the greater the amount of shrinkage occurs when the driving member 21 is heated and shrunk, the said The movable stroke of the driving member 21 is larger. The movable part 24 , at least a part of the driving member 21 and at least a part of the restoring member 22 are disposed on the same side of the base 12 , and the first fixing portion 231 is disposed on the side of the base 12 The adjacent side or the opposite side, the second fixed part 232 is arranged on the same side or the adjacent side of the side of the base 12, and the movable part 24 is arranged on the first fixed part 231 and the first fixed part 231. between the two fixing parts 232 . This arrangement can increase the overall length of the driving member 21 to increase the movable stroke of the driving member 21 .

Further, in the embodiment of the present application, the driving member 21 is arranged on the side of the transmission mechanism 40, it can also be said that the driving member 21 is arranged on the edge of the base 12, and at least A part of the straight lines along the length direction are parallel to one side of the base 12 . Further, the driving member 21 is close to the side of the base 12 to provide enough space for the placement of the transmission mechanism 40 . Since the driving member 21 and the transmission mechanism 40 are disposed along the horizontal direction, the center of the transmission mechanism 40 is not consistent with the center of the variable aperture device 100 .

As shown in FIG. 14A and FIG. 14B, in another embodiment of the present application, the driving member 21 and the restoring member 22 are arranged on opposite sides of the base 12, and the driving member 21 and the restoring member 22 Extend along the circumference of the transmission mechanism 40 . In a specific example of the present application, the drive member 21 and the return member 22 are in an arc structure, the arc where the drive member 21 is located is opposite to the arc where the return member 22 is located, and the fixing portion 23 and the movable part 24 are both disposed between the driving member 21 and the restoring member 22 . Further, the driving member trailing end 212 of the driving member 21 is connected to the movable part 24, the driving member fixed end 213 of the driving member 21 is connected to the first fixing part 231, and the returning The pulling end 222 of the recovery member 22 is connected to the movable part 24, the fixed end 223 of the recovery member 22 is connected to the second fixed part 232, and the movable part 24 is arranged on the Between the first fixing part 231 and the second fixing part 232 . In a specific example of the present application, the first fixed part 231 and the second fixed part 232 are located on the same side of the base 12, and the movable part 24 is located on the base 12 to be connected to the first fixed part. part 231 and the side opposite to the side where the second fixing part 232 is located.

In another specific example of the present application, the first fixing portion 231 and the second fixing portion 232 may also be disposed on different sides of the base 12 . For example, the first fixed part 231 and the second fixed part 232 are arranged on opposite sides of the base 12, and the movable part 24 is arranged on the base 12 to be connected to the first fixed part 231 and the second fixed part 232. The side adjacent to the side where the second fixing portion 232 is located. In a specific example of the present application, the fixed part 23 and the movable part 24 are clamping pieces, which are respectively clamped and connected with the driving member 21 and the restoring member 22 . In another specific example of the present application, the fixed part 23 and the movable part 24 are fixed protrusions, which are wound and connected with the driving member 21 and the restoring member 22 respectively, which is not limited in the present application.

Specifically, in one embodiment of the present application, when the driving member 21 is an SMA wire, and the restoring member 22 is a spring, one end of the SMA wire is connected to the first fixing part 231, and passes through the first fixing part 231. The part 231 makes the SMA wire fixed on the base 12, the other end of the SMA wire is connected to the movable part 24, and one end of the spring is connected to the second fixing part 232, and the spring is fixed by the second fixing part 232. On the base 12 , the other end of the spring is connected to the movable part 24 . In the initial state, the SMA wire connects one end of the first fixed part 231 to the straight line where the spring connects one end of the second fixed part 232, and the end of the SMA wire connected to the movable part 24 is connected to the spring. The straight lines connecting one end of the movable part 24 are parallel to each other; after electrification, the SMA wire is heated and shrinks, and the SMA wire provides a positive torque to the transmission mechanism 40 to drive the transmission mechanism 40 to rotate. Specifically, the SMA wire has an arc-shaped structure, and the SMA will generate an arc-shaped contraction track after being energized, and then drive the moving part 24 to rotate, and then drive the transmission mechanism 40 to rotate. In other words, after the SMA wire shrinks, the spring is stretched, the arc length of the SMA wire shrinks, and the arc length of the spring elongates; The forward torque is opposite to the reverse torque, so as to drive the transmission mechanism 40 to reversely rotate to return to the initial position.

Specifically, in another embodiment of the present application, the driving member 21 is a first SMA wire 211, the restoring member 22 is a second SMA wire 221, and one end of the first SMA wire 211 is connected to the first SMA wire 211. A fixing part 231, and the first SMA wire 211 is fixed on the base 12 through the first fixing part 231, the other end of the first SMA wire 211 is connected to the movable part 24, and the first SMA wire 211 is connected to the movable part 24. One end of the two SMA wires 221 is connected to the second fixing part 232, and the second SMA wire 221 is fixed to the base 12 through the second fixing part 232, and the other end of the second SMA wire 221 is Connected to the movable part 24. In the initial state, the straight line where one end of the first SMA wire 211 connects to the first fixing portion 231 and the second SMA wire 221 connects to one end of the second fixing portion 232 is located, which is in line with the The straight line where the end of the first SMA wire 211 is connected to the movable part 24 and the line connecting the end of the second SMA wire 221 to the movable part 24 is parallel to each other. After electrification, the first SMA wire 211 is heated and shrinks, and the first SMA wire 211 provides a positive torque to the transmission mechanism 40 to drive the transmission mechanism 40 to rotate. Specifically, the first SMA wire 211 has an arc-shaped structure, and the first SMA will generate an arc-shaped contraction track after being energized, and then drive the movable part 24 to rotate, and then drive the transmission mechanism 40 to rotate. In other words, after the first SMA wire 211 shrinks, the second SMA wire 221 is stretched, the arc length of the first SMA wire 211 shrinks, and the arc length of the second SMA wire 221 elongation. Stop energizing the first SMA wire 211 or reduce the current energizing the first SMA wire 211, then energize the second SMA wire 221, the second SMA wire 221 shrinks when heated, and the second SMA wire 211 The wire 221 provides a reverse torque opposite to the forward torque to the transmission mechanism 40 to drive the transmission mechanism 40 to reversely rotate to return to the initial position. It is worth mentioning that, in the embodiment of the present application, the contraction amount of the driving member 21 is the movable stroke of the driving member 21 along the arc direction where it is located. Preferably, in this preferred embodiment of the present application, the driving member 21 and the restoring member 22 are helical SMA wires, and the driving member 21 and the returning member 22 are symmetrically arranged on the transmission Both sides of the mechanism 40.

Specifically, in the embodiment of the present application, the driving assembly 20 further includes a first guiding mechanism 25 and a second guiding mechanism 26, and the driving member 21 and the restoring member 22 are placed in the first guiding mechanism. The first guiding mechanism 25 and the second guiding mechanism 26 guide the expansion and contraction of the driving member 21 and the restoring member 22 through the first guiding mechanism 25 and the second guiding mechanism 26 . The shapes of the first guiding mechanism 25 and the second guiding mechanism 26 are adapted to the shapes of the driving member 21 and the restoring member 22 . In a specific example of the present application, the driving member 21 and the restoring member 22 are elongated, and the first guiding mechanism 25 and the second guiding mechanism 26 are correspondingly elongated. In another specific example of the present application, the driving member 21 and the restoring member 22 are arc-shaped, and the first guiding mechanism 25 and the second guiding mechanism 26 are correspondingly arc-shaped. Furthermore, the first guiding mechanism 25 has a first guiding surface 250, and the second guiding mechanism 26 has a second guiding surface 260, wherein the first guiding mechanism 25 has a The first guiding surface 250 and the second guiding surface 260 of the second guiding mechanism 26 have the same elongated or arc-shaped structure as the driving member 21 and the restoring member 22 .

Preferably, in this preferred embodiment of the present application, the first guiding mechanism 25 and the second guiding mechanism 26 present a semicircular tubular structure with openings at both ends, wherein the driving member 21 is built in Inside the first guide mechanism 25 , the restoring member 22 is built inside the second guide mechanism 26 . Optionally, in this preferred embodiment of the present application, the first guiding mechanism 25 and the second guiding mechanism 26 are semi-circular structures with an inner ring surface, wherein the first guiding mechanism 25 The first guide surface 250 of the second guide mechanism 26 and the second guide surface 260 of the second guide mechanism 26 face opposite sides of the transmission mechanism 40 .

The driving member 21 is placed in the first guiding mechanism 25, the restoring member 22 is placed in the second guiding mechanism 26, and the extension direction of the first guiding mechanism 25 is consistent with that of the driving member. 21 in the same extension direction, the extension direction of the second guide mechanism 26 is the same as the extension direction of the restoration member 22, and the arc-shaped driving member 21 and the restoration member 22 are in the process of shrinking and stretching Other movement directions will be generated in the middle, for example: move along the direction of the center of the arc. The setting of the first guiding mechanism 25 and the second guiding mechanism 26 can control the shrinkage of the driving member 21 and the restoring member 22 between the first guiding mechanism 25 and the second guiding mechanism. In the guiding mechanism 26, it is ensured that the driving member 21 and the restoring member 22 can move along an arc track. The driving member 21 is arranged in an arc-shaped structure, which can increase the total length of the SMA wire, increase the heat shrinkage of the SMA wire, and further increase the movable stroke. Not only that, the arrangement of the first guiding mechanism 25 and the second guiding mechanism 26 can also protect the driving member 21 and the restoring member 22 . In a specific example of the present application, the first guiding mechanism 25 and the second guiding mechanism 26 are made of ceramic material, and the ceramic material has a certain heat insulation effect, so as to avoid rapid loss of heat generated by SMA energization.

Optionally, in other optional embodiments of the present application, the first guiding mechanism 25 is placed inside the driving member 21 , and the second guiding mechanism 26 is placed inside the restoring member 22 , the driving member 21 is supported and guided by the first guide mechanism 25 , and the return mechanism 22 is supported and guided by the second guide mechanism 26 . It is worth mentioning that the driving member 21 and the restoring member 22 are in a helical semi-circular structure, wherein the first guiding mechanism 25 and the second guiding mechanism 26 have The same semi-circular support structure as the restoring member 22 .

As shown in FIG. 1 , in the embodiment of the present application, the variable aperture device 100 further includes a cover plate 50 disposed between the cover body 11 and the transmission mechanism 40 . In a specific example of the present application, the cover plate 50 is fixedly arranged on the top surface of the transmission mechanism 40, and this arrangement makes the blade assembly 30 arranged in the transmission mechanism 40 clamped It is arranged between the cover plate 50 and the base 12 , and this arrangement can prevent the blade assembly 30 from breaking away from the shaft protrusion 1232 during the rotation process, and thus from its original position. Further, the surface of the transmission mechanism 40 may have an uneven surface during the manufacturing process, and the cover plate 50 rotates with the rotation of the transmission mechanism 40, reducing the distance between the cover plate 50 and the cover. Friction between bodies 11. In another specific example of the present application, the cover plate 50 may also be only sandwiched between the cover body 11 and the transmission mechanism 40 , which is not limited in the present application.

As shown in Fig. 14A and Fig. 14B, in the embodiment of the present application, the variable aperture device 100 further includes the electrical connection element 60, wherein the electrical connection element 60 is arranged on the housing, and the electrical connection Element 60 is electrically connected to said drive assembly 20 . The electrical connection element 60 includes at least two connection terminals 61 installed on the base 12, at least two connection terminals 61 are arranged on the side where the fixing part 23 of the drive assembly 20 is located, and pass through the The fixing portion 23 is electrically connected to the driving member 21 and the restoring member 22 . In a specific example of the present application, at least two of the connection terminals 61 are integrally formed with the base 12 through an insert injection molding process. Further, the connection terminal 61 includes a lower end and an upper end integrally extended from the lower end, wherein the connection terminal 61 is fixed to the fixing portion 23 of the base 12 by insert injection molding, and the connection terminal The lower end of 61 is partially exposed for electrical connection with other conductive elements of the camera module. The top surface of the upper end of the connecting terminal 61 is exposed, the fixing part 23 is arranged on the top surface of the upper end of the connecting terminal 61, and is connected with the driving member 21 and the restoring member 22 through the fixing part 23 electrical connection. It can be understood that, in this application, the fixed part 23 and the movable part 24 are made of metal, and the driving member 21 and the restoring member 22 can be realized through the fixed part 23 and the movable part 24. The circuit is turned on.

Exemplary Camera Module

As shown in FIG. 15 , a camera module according to an embodiment of the present application is illustrated, which includes a photosensitive component 300 , a lens component 200 held on the photosensitive path of the photosensitive component 300 , and an iris device 100 .

The lens assembly 200 includes an optical lens 210 and a lens driving assembly 220 for driving the optical lens 210 to move. The optical lens 210 is an integrated lens, which includes a lens barrel 2110 and at least one lens group 2120 accommodated in the lens barrel 2110, and the at least one lens group 2120 includes at least one optical lens. The lens driving assembly 220 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 The movable part of the lens is driven to move relative to the fixed part of the lens. The optical lens 210 is fixed to the lens movable part of the lens driving assembly 220 and is driven by the lens driving assembly 220 to move along the direction of the optical axis or move perpendicular to the direction of the optical axis, thereby realizing the automatic operation of the camera module. Focus function or optical image stabilization function.

In another embodiment of the present application, the optical lens 210 is a split lens, which includes a plurality of lens parts, specifically, 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 part includes at least one first lens, in some embodiments, the first A lens component further includes a first lens barrel, and the at least one first lens is accommodated in the first lens barrel.

The photosensitive component 300 includes a chip circuit board 310 , a photosensitive chip 320 mounted on the chip circuit board 310 , an electronic component 330 , a connector 340 , a base 350 and a filter element 360 . The chip circuit board 310 includes a circuit board main body, a connection strip and a connector 340 part, and the connection strip connects the circuit board main body and the connector 340 part and realizes the circuit board main body and the connector part electrical conduction between. The photosensitive chip 320 and the electronic component 330 are electrically connected to the main body of the circuit board.

The photosensitive chip 320 is used for receiving the external light collected by the lens assembly 200 to form an image and electrically connecting with the portable device through the chip circuit board 310 . The photosensitive chip 320 includes a photosensitive area and a non-photosensitive area, and the photosensitive chip 320 is electrically connected to the chip circuit board 310 through the pad of the photosensitive chip 320 located in the non-photosensitive area. For example, the photosensitive chip 320 is connected by wire bonding. (gold wire), welding, FC process (flip chip) or RDL (redistribution layer technology) and other methods to electrically connect to the circuit board main body of the chip circuit board 310 . The photosensitive chip 320 is adapted to be fixed on the front of the main body of the circuit board through an adhesive medium (the surface of the chip circuit board 310 facing the lens assembly 200 is defined as the front side, and the side opposite to the front side of the chip circuit board 310 is the front side of the chip circuit board 310 bottom). In some embodiments of the present application, there is a groove or a through hole (circuit board through hole) in the middle of the main body of the circuit board, and the photosensitive chip 320 is installed and fixed in the groove or the through hole of the circuit board main body , thereby reducing the influence of the thickness of the main body of the circuit board on the thickness of the photosensitive component 300 and reducing the height of the camera module.

The base 350 is disposed on the circuit board main body of the chip circuit board 310 for supporting other components. In one embodiment of the present application, the base 350 is implemented as a separately molded plastic bracket, which is attached to the surface of the main body of the circuit board through an adhesive medium and used to support other components. Of course, in other embodiments of the present application, the base 350 can also be formed on the main body of the circuit board in other ways, for example, the base 350 is implemented as a molded base 350, which is integrally formed on the circuit board through a molding process. The preset position of the main body of the circuit board is not limited by this application.

In one embodiment of the present application, the filter element 360 is held on the photosensitive path of the photosensitive chip 320 for filtering the imaging light entering the photosensitive chip 320 . In a specific embodiment of the present application, the filter element 360 is installed on the base 350 and corresponds to at least the photosensitive area of the photosensitive chip 320 . It is worth mentioning that, in other examples of the present application, the filter element 360 may be indirectly installed on the base 350 through other support members. Moreover, in other embodiments of the present application, the filter element 360 can also be installed in other positions of the camera module, for example, the filter element 360 is formed in the optical lens 210 (for example, As a layer of filter film attached to the surface of a certain optical lens of the optical lens 210), this is not limited by the present application.

In one embodiment of the present application, the photosensitive assembly 300 further includes a chip driving assembly (not shown in the drawings), and the chip driving assembly is suitable for driving the photosensitive chip 320 of the photosensitive assembly 300 to translate, rotate or tilt, Then realize the anti-shake function of the chip of the camera module.

The variable aperture device 100 is installed on the top surface or the middle of the optical lens 210 . In an embodiment of the present application, the variable aperture device 100 is installed on the top surface of the optical lens 210 , and the variable aperture device 100 is fixed to the optical lens 210 . Specifically, the base 12 of the variable aperture device 100 is bonded to the lens barrel 2110 of the optical lens 210 through an adhesive medium, and at least a part of the optical lens 210 extends into the shell of the variable aperture device 100 in the body through hole. The aperture driving circuit board of the variable aperture device 100 is electrically connected to the lens driving assembly 220. In one embodiment of the present application, the driving circuit board of the variable aperture is connected to the lens driving assembly 220 for Reset the electric connection of the shrapnel of the transmission mechanism 40 .

In another embodiment of the present application, when the optical lens 210 is a split lens, the variable aperture device 100 may be disposed in the middle of the optical lens 210 . Specifically, the second lens part is installed and fixed on the lens driving assembly 220, the first lens part is installed and fixed on the top surface of the variable aperture device 100, and the variable aperture device 100 is further installed and fixed on The lens barrel 2110 of the optical lens 210 , and then the first lens part and the second lens part are arranged along the optical axis of the optical lens 210 .

It should be understood by those skilled in the art that the embodiments of the present invention shown in the foregoing description and drawings are only examples and do not limit the present invention. The objects of the present invention have been fully and effectively accomplished. The functions and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention may have any deformation or modification without departing from the principles.

Claims (20)

1. The variable aperture device is characterized in that it comprises: case; blade assembly; A transmission mechanism, wherein the transmission mechanism is rotatably arranged on the housing, engages with the blade assembly, and drives the blade assembly through the transmission mechanism to form a light through hole with a variable aperture; and A drive assembly, the drive assembly further includes a drive member and a return member, wherein the drive member and the return member are fixed to the housing and are rotatably connected to the transmission mechanism, wherein the drive member can A force for driving the transmission mechanism to rotate is provided, and the restoring member provides a force for reverse rotation to drive the transmission mechanism to rotate reciprocally through the driving member and the restoring mechanism. 2. The variable aperture device according to claim 1, further comprising at least one movable part, wherein the at least one movable part is connected with the transmission mechanism, the driving member and the restoring member of the driving assembly are driven telescopically connected to the at least one movable part. 3. The variable aperture device according to claim 2, wherein the driving member further includes a driving member trailing end and a driving member fixed end, the restoring member further includes a restoring member trailing end and a restoring member fixing end, the driving The fixed end of the member and the fixed end of the return member are fixed to the housing, the movable part is driveably connected to the trailing end of the driving member and the trailing end of the restoring member, and the trailing end of the driving member and The trailing end of the restoring member is located on the opposite side of the movable part, and the transmission mechanism is driven to rotate reciprocally by the driving member and the restoring member through the movable part. 4. The variable aperture device according to claim 3, wherein the driving member and the restoring member are fixed on the same side of the housing, and the driving member trailing end, the restoring member trailing end and The movable parts are in the same line. 5. The variable aperture device according to claim 3, wherein the driving member fixing end and the restoring member fixing end of the driving member are fixed to adjacent sides of the housing. 6. The variable aperture device according to claim 3, further comprising a fixing portion, wherein the fixing portion is fixed to the casing, and the fixed end of the driving member and the fixed end of the restoring member are fixed by the fixed end. fixed to the housing. 7. The variable aperture device according to claim 6, wherein the fixing portion includes a first fixing portion and a second fixing portion, wherein the driving member is telescopically provided between the first fixing portion and the second fixing portion. Between the movable part, the restoring member is telescopically disposed between the second fixing part and the movable part. 8. The variable aperture device according to claim 4, wherein the driving member is a linear SMA wire. 9. The variable aperture device according to claim 5, wherein the driving member further comprises at least one curved section and at least two straight sections integrally extending from the curved section. 10. The variable aperture device of claim 4, wherein the driving member is a helical SMA wire. 11. The variable aperture device according to any one of claims 8 to 10, wherein the restoring member is selected from a combination of elastic elements consisting of a spring and a shrapnel. 12. The variable aperture device according to any one of claims 8 to 10, wherein the restoring member is an SMA wire. 13. The variable aperture device according to any one of claims 8 to 10, wherein M is the contraction amount of the driving member, α is the rotation angle of the transmission mechanism, and L is the length from the axis O to the driving member The distance of the straight line where the direction is located, M>sinα*L. 14. The variable aperture device according to claim 9, wherein the housing comprises a base and a cover fastened to the base, wherein the base further comprises a base body and at least A winding post, the at least one winding post is integrally formed on the base body, and the curved section is in contact with the winding post, the two straight sections of the driving member are located on the base adjacent side of . 15. The variable aperture device according to any one of claims 8 to 10, wherein the transmission mechanism comprises a transmission body and a moving end arranged on the transmission body, wherein the movement end is from the outside of the transmission body Integrally extending outward, the moving end is drivingly connected with the movable part. 16. The variable aperture device according to claim 3, wherein the blade assembly comprises a plurality of blade elements, wherein each of the blade elements comprises a blade body and a blade hub, wherein the blade body and the blade hub connected, wherein the transmission mechanism includes a transmission main body and a plurality of driving teeth, wherein the transmission main body is in an annular structure, and the plurality of driving teeth are arranged on the inside of the transmission main body, wherein the blade sleeve and the The drive teeth of the transmission mechanism are meshed with each other. 17. The variable aperture device according to claim 16, wherein the casing comprises a cover and a base, wherein the base and the cover can be fastened together to form a storage cavity, the storage cavity Used to accommodate the drive assembly, the blade assembly and the transmission mechanism, wherein the base includes a base body and a first protrusion and a second protrusion formed on the base body, and formed on the base body The annular groove of the first protrusion and the second protrusion, wherein the second protrusion includes a position-limiting protrusion and a plurality of shaft protrusions, and the blade sleeve is covered by the second protrusion of the second protrusion. Shaft convex restriction, the limit baffle set includes a first limit baffle and a second limit baffle, the first limit baffle and the second limit baffle form the limit groove, The limiting protrusion is located in the limiting groove of the limiting baffle set. 18. The variable aperture device according to claim 17, further comprising a cover plate disposed between the cover body and the transmission mechanism. 19. The variable aperture device according to claim 3, further comprising an electrical connection element, wherein the electrical connection element is disposed on the casing, and the electrical connection element is electrically connected to the driving assembly. 20. A camera module, characterized in that it comprises: Photosensitive components; a lens assembly held in the photosensitive path of the photosensitive assembly; and The variable aperture device according to any one of claims 1 to 19, wherein the variable aperture device is arranged on the light incident side of the lens assembly.

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