Variable aperture device and camera module

Abstract

The present application provides a variable aperture device, which includes a fixed component; an aperture component, including a first blade and a second blade to form an aperture, the first blade and the second blade are rotatably connected, the first blade drives the second blade to slide together in the fixed component, so that the aperture component has a large aperture state and a small aperture state; and a first driving component drives the first blade to move, so that the aperture component switches between the large aperture state and the small aperture state. The first blade and the second blade can be opened and closed in a controlled manner, thereby switching the aperture between the large aperture state and the small aperture state, and different aperture states make the characteristics of the light beam passing through the variable aperture device of the embodiment of the present application different.

Description

Technical Field

[0001] The present application relates to an aperture device, and in particular to a variable aperture device and a camera module. Background Art

[0002] The aperture device is an important component of the camera module. The aperture device has an aperture. By adjusting the area of ​​the aperture, the amount of light entering the camera module can be adjusted so that the formed image has different brightness and depth of field. When the area of ​​the aperture is larger, the camera module has a larger amount of light entering, so that the formed image has high brightness and good background blur effect. When the area of ​​the aperture is smaller, the camera module has a smaller amount of light entering, so that the details in the formed image are very clear.

[0003] As an important component of the camera module, the characteristics of the aperture device can affect the function of the camera module. For example, a mobile phone is small in size and thin in thickness, and the space for setting the camera module is also very small. Therefore, a fixed aperture device with a simple structure is usually provided. However, the aperture area of ​​the fixed aperture device is fixed and cannot adapt well to different shooting scenes.

[0004] In addition, in the plane perpendicular to the optical axis, the shape of the aperture will affect the shape of the bright area of ​​the image. If the shape of the aperture is close to a circle, the overall image will be more rounded. Otherwise, it will be abrupt and incoherent.

[0005] In addition, in the plane perpendicular to the optical axis, the position of the centroid of the aperture relative to the optical axis will affect the position of the bright area of ​​the image. When the position of the centroid deviates too much from the optical axis, the image will be unbalanced.

[0006] With the development of the market, mobile phones that use fixed aperture devices to shoot images cannot meet the needs of users, so mobile phones that use variable aperture devices to shoot images are needed to shoot in different shooting scenes. To meet this demand, a variable aperture device that can adjust the aperture size is desired. Summary of the invention

[0007] The present application aims to provide a variable aperture device and a camera module capable of adjusting the aperture size.

[0008] According to one embodiment of the present application, a variable aperture device is provided. The variable aperture device may include: a fixed component; an aperture component, including at least a first blade and a second blade to form an aperture, the first blade and the second blade being rotatably connected, the first blade driving the second blade to slide together in the fixed component, so that the aperture component has a large aperture state and a small aperture state; and a first driving component, driving the first blade to move, so that the aperture component switches between the large aperture state and the small aperture state.

[0009] The first blade and the second blade are rotatably connected so that the first blade and the second blade can be opened and closed in a controlled manner. The fixing component is slidably connected to the first blade and the second blade respectively, and can be used to limit the respective positions and swing angles of the first blade and the second blade, and enable the second blade to be linked when the first driving component drives the first blade, thereby switching the aperture between a large aperture state and a small aperture state. Different aperture states result in different characteristics of the light beam passing through the variable aperture device of the implementation mode of the present application.

[0010] According to an embodiment of the present application, the fixing component may include a light-through hole, and at least a portion of the light-through hole is used to form an aperture.

[0011] According to an embodiment of the present application, the first blade may have a first aperture side for forming an aperture, and a curvature of the first aperture side gradually decreases from one end to the other end of the first aperture side.

[0012] According to an embodiment of the present application, the second blade may have a second aperture side for forming an aperture, and a curvature of the second aperture side along one end to the other end of the second aperture side is the same as a curvature of the first aperture side.

[0013] According to an embodiment of the present application, a ratio of the maximum curvature to the minimum curvature of the first aperture side is no greater than 4.

[0014] According to an embodiment of the present application, the first blade and the second blade can be rotatably connected via a first rotating shaft; one of the first blade and the fixed component is provided with a first sliding groove, and the other is provided with a first sliding column, and the axis of the first sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the first sliding column is in contact with the side wall of the first sliding groove; one of the second blade and the fixed component is provided with a second sliding groove, and the other is provided with a second sliding column, and the axis of the second sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the second sliding column is in contact with the side wall of the second sliding groove.

[0015] According to an embodiment of the present application, the fixing assembly has a reference axis, and when the first blade moves, the centroid of the aperture is located on the reference axis.

[0016] According to an embodiment of the present application, a first Cartesian coordinate system is provided in a vertical plane of the axis of the first rotating shaft, the first Cartesian coordinate system has a first origin and a first Y-axis, and a point of the extension trajectory of the first sliding groove has a horizontal coordinate X1 and a vertical coordinate Y1 in the first Cartesian coordinate system; when the aperture assembly is in a large aperture state, the projection point of the axis of the first rotating shaft coincides with the first origin, the axis of the first sliding column is located at the starting point of the extension trajectory of the first sliding groove, and the centroid of the aperture is located at the positive half axis of the first Y-axis; the distance between the starting point of the extension trajectory of the first sliding groove and the first origin is R1, the angle between the line connecting the projection point of the axis of the first sliding column and the projection point of the first rotating shaft and the positive direction of the first Y-axis is θ, and the change in the distance between the centroid of the aperture and the projection point of the axis of the first rotating shaft 23 is f(θ); the horizontal coordinate X1 and the vertical coordinate Y1 satisfy: According to an embodiment of the present application, the transformation amount f(θ) may satisfy: f(θ)=0.5(R1-R1cosθ).

[0017] According to an embodiment of the present application, when the aperture assembly is in a large aperture state, the extension track of the second sliding slot and the extension track of the first sliding slot may be symmetrical with respect to the first Y-axis.

[0018] According to an embodiment of the present application, the variable aperture device may be provided with a second driving assembly, and the second driving assembly is used to drive the second blade.

[0019] According to an embodiment of the present application, a first operating part may be provided on the side of the first blade facing away from the aperture; the first driving component includes a coil and a magnetic element, the coil is fixed relative to the fixed component, the magnetic element is slidably connected to the fixed component, the coil is used to drive the magnetic element to slide, and the magnetic element is used to apply force to the first operating part.

[0020] According to an embodiment of the present application, the first driving component may further include a first elastic element, one end of the first elastic element is connected to the fixing component, and the other end of the first elastic element is connected to the magnetic element.

[0021] According to an embodiment of the present application, the variable aperture device may also be provided with a second elastic element, and the first blade may be provided with a second operating portion; one end of the second elastic element is fixedly connected to the second operating portion, and the other end is fixedly connected to the fixing assembly or the second blade.

[0022] According to an embodiment of the present application, the first driving component may include a first shape memory body and a second shape memory body, and the first blade is provided with a first pin and a second pin; one end of the first shape memory body is connected to the fixed component, and the other end is rotatably connected to the first pin; one end of the second shape memory body is connected to the fixed component, and the other end is rotatably connected to the second pin.

[0023] According to an embodiment of the present application, the first blade and the second blade can be rotatably connected via a first rotating shaft; the first driving assembly is used to drive the first rotating shaft to move radially along the first rotating shaft to switch the aperture assembly between a large aperture state and a small aperture state.

[0024] According to an embodiment of the present application, a camera module is provided, which may include at least one lens and a variable aperture device in the above embodiment, wherein the variable aperture device is arranged on the object side or the image side of the lens.

[0025] According to the implementation manner of the present application, the camera module may be one of a periscope camera module, a zoom module, a fixed focus module, an automatic focus module or a coordinated lens module.

[0026] According to an embodiment of the present application, an electronic device is provided, which may include the camera module in the above embodiment.

[0027] According to an embodiment of the present application, a method for manufacturing a variable aperture device is provided, comprising the following steps: slidingly engaging an aperture assembly with a fixed assembly, the aperture assembly comprising a first blade and a second blade that are rotatably connected; dynamically connecting a first drive assembly with the first blade, and connecting the first drive assembly with the fixed assembly; and driving the first blade to move by the first drive assembly so that the aperture assembly is in a large aperture state or a small aperture state as a default state.

[0028] According to an embodiment of the present application, the fixed component includes an aperture carrier and a shell. In the manufacturing method of the variable aperture device, the aperture component is slidingly engaged with the aperture carrier; before the first driving component drives the first blade to move, the shell is snapped onto the aperture carrier, and the aperture component is located in the gap between the aperture carrier and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other advantages of the embodiments of the present application will become apparent through the detailed description made with reference to the following drawings, which are intended to illustrate exemplary embodiments of the present application rather than to limit them. In the drawings:

[0030] Figure 1 A schematic structural diagram of a variable aperture device according to an embodiment of the present application is shown;

[0031] Figure 2 A schematic exploded view of a variable aperture device according to an embodiment of the present application is shown;

[0032] Figure 3 Shown according to Figure 1 A top view of

[0033] Figure 4A schematic structural diagram of a drive assembly according to an embodiment of the present application is shown;

[0034] Figure 5 A schematic structural diagram of a variable aperture device according to another embodiment of the present application is shown;

[0035] Figure 6 shows a top view of an aperture carrier according to an embodiment of the present application;

[0036] Figure 7 A schematic structural diagram of an aperture assembly according to an embodiment of the present application is shown;

[0037] Figure 8 A top view of a variable aperture device according to another embodiment of the present application is shown;

[0038] Fig. 9 A top view of a variable aperture device according to another embodiment of the present application is shown;

[0039] Fig.10 A bottom view of an aperture assembly according to another embodiment of the present application is shown;

[0040] Fig.11 Shown according to Fig.10 Bottom view of the middle aperture assembly in the small aperture state;

[0041] Fig.12 shows a top view of an aperture carrier according to yet another embodiment of the present application;

[0042] Fig.13 A top view of a variable aperture device according to another embodiment of the present application is shown;

[0043] Fig.14 Shown according to Fig.13 A top view of the variable aperture device when the middle aperture assembly is in a small aperture state;

[0044] Fig.15 shows a bottom view of a second blade according to an embodiment of the present application;

[0045] Fig.16 shows a top view of an aperture carrier according to yet another embodiment of the present application;

[0046] Fig.17 A top view of a variable aperture device according to another embodiment of the present application is shown;

[0047] Fig.18 Shown according to Fig.17 A top view of the variable aperture device when the middle aperture assembly is in a small aperture state;

[0048] Fig.19 A schematic structural diagram of a variable aperture device according to another embodiment of the present application is shown;

[0049] Fig. 20 A top view of a variable aperture device according to another embodiment of the present application is shown;

[0050] Fig.21 Shown according to Fig. 20 A top view of the variable aperture device when the middle aperture assembly is in a small aperture state;

[0051] Fig. 22 A schematic structural diagram showing a variable aperture device according to another embodiment of the present application; and

[0052] Fig.23 A flow chart of a method for manufacturing a variable aperture device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0053] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way.

[0054] The terms used herein are for the purpose of describing specific exemplary embodiments and are not intended to be limiting. When used in this specification, the terms "comprise", "comprising", "including" and / or "comprising" specify the presence of the features, integral bodies, elements, parts and / or groups thereof, but do not exclude the presence of one or more other features, integral bodies, elements, parts and / or combinations thereof.

[0055] The exemplary embodiments are described herein with reference to schematic diagrams of the exemplary embodiments. The exemplary embodiments disclosed herein should not be interpreted as being limited to the specific illustrated shapes of the regions, but include various equivalent structures capable of achieving the same functions and shape deviations resulting from, for example, manufacturing. The positions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of the device and are not intended to be limiting.

[0056] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0057] The features, principles and other aspects of the present application are described in detail below.

[0058] Please refer to Figures 1 to 7 The present application provides a variable aperture device. The variable aperture device includes: a fixed component 10, an aperture component 20 and a first drive component 30. The fixed component 10 has a reference axis. The reference axis of the fixed component 10 is a virtual axis based on a matching reference or a design reference: when the variable aperture device is matched with a lens, the reference axis refers to the optical axis (central field of view) of the lens to be matched; or, when the cross-sectional area of ​​the light beam passing through the variable aperture device is the largest, the straight line along the direction of the light beam where the centroid of the cross section is located. Generally, the design reference is the matching reference.

[0059] In an exemplary embodiment, the aperture assembly 20 includes at least a first blade 21 and a second blade 22 to form an aperture, the first blade 21 and the second blade 22 are rotatably connected, the first blade 21 drives the second blade 22, and the two are slid together in the fixed assembly 10, so that the aperture assembly 20 has a large aperture state and a small aperture state. When the aperture assembly 20 is in the large aperture state, the aperture size of the variable aperture device is greater than the aperture size of the variable aperture device when the aperture assembly 20 is in the small aperture state.

[0060] Exemplarily, the first blade 21 is provided with a first operating part, the first blade 21 and the second blade 22 are rotatably connected via a first rotating shaft 23, the first blade 21 and the second blade 22 are respectively slidably connected to the fixed component 10, the first blade 21 has a first aperture side 2101, the second blade 22 has a second aperture side 2201, and the first aperture side 2101 and the second aperture side 2201 are respectively used to form an aperture.

[0061] The first rotating shaft 23 can be fixedly connected to one of the first blade 21 and the second blade 22, and rotatably connected to the other; or it can be rotatably connected to both. The axis of the first rotating shaft 23 can be parallel to the reference axis, or it can be at a certain acute angle. When the axis of the first rotating shaft 23 is parallel to the reference axis, the movement space occupied by the aperture assembly 20 is small and the projection shape in the vertical plane of the reference axis is stable. Relative to the axis of the first rotating shaft 23, the first blade 21 and the fixed assembly 10 form a swing follower moving cam mechanism, and the second blade 22 and the fixed assembly 10 also form a swing follower moving cam mechanism. By adjusting the sliding trajectory of the first blade 21 and the second blade 22, the first blade 21 and the second blade 22 can have different positions and swing angles relative to the fixed assembly 10. In particular, one of the first blade 21 and the second blade 22 only translates without rotation relative to the fixed assembly, or only rotates without translation. By adjusting the shape of the first aperture side 2101 and the second aperture side 2201, different specific shapes of the aperture can be achieved. In the perpendicular plane of the reference axis, the projections of the first aperture side 2101 and the second aperture side 2201 form at least a portion of the aperture edge.

[0062] In an exemplary embodiment, the first driving assembly 30 drives the first blade 21 to move so that the aperture assembly 20 switches between a large aperture state and a small aperture state.

[0063] When the first driving assembly 30 is provided, it can ensure that the aperture assembly 20 is stably switched to the large aperture state or the small aperture state, and the posture of the aperture assembly 20 may be unstable during the switching process. Therefore, the sliding trajectories of the first blade 21 and the second blade 22 may not be limited, but only the positions of the starting point and the end point are guaranteed. For example, the two sliding trajectories are wedge-shaped, or one sliding trajectory is a straight line and the other is a curve. Moreover, on the first blade 21 and the second blade 22, the shapes of the first aperture side 2101 and the second aperture side 2201 can be designed based only on the positions in the large aperture state and the small aperture state, such as a partially broken line shape.

[0064] In an exemplary embodiment, the first drive assembly 30 may include a first end and a second end that move relative to each other, the first end being connected to the fixed assembly, and the second end being connected to the first operating part. Exemplarily, the first drive assembly 30 includes a rack and pinion mechanism, the rack being slidably connected to the fixed assembly 10, the rack including an operating hole 312, and the operating hole 312 being provided with the first operating part. Exemplarily, the first drive assembly 30 includes a motor, an operating rope, and a reset spring, the motor being disposed on the fixed assembly 10, one end of the operating rope being wound around the output shaft of the motor, and the other end being connected to the first operating part, one end of the reset spring being connected to the first operating part, and the other end of the reset spring being connected to the fixed assembly 10. The force provided by the reset spring is opposite to the force transmitted by the operating rope, and the combined force of the two forces drives the first blade 21 to move.

[0065] The variable aperture device disclosed in the embodiment of the present application has an aperture assembly 20 that can switch between a large aperture state and a small aperture state, so that the variable aperture device has a large aperture and a small aperture, thereby making the characteristics of the light beam passing through the variable aperture device different. And the two blades are linked by a first driving assembly 30, and the variable aperture device occupies a small space.

[0066] In an exemplary embodiment, the fixed component 10 includes a light hole 123, at least a portion of which is used to form an aperture. The position of the light hole 123 on the fixed component 10 is relatively fixed, but when a portion of the light hole 123 is used to form an aperture, the projection of the aperture component 20 in the vertical plane of the reference axis can be corrected so that the formed aperture is closer to a circle or closer to other preset shapes, such as a cat's eye shape. When the fixed component 10 includes the light hole 123, the end of the first blade 21 away from the first rotation axis 23 does not actually participate in the formation of the aperture, so it can be considered that the portion of the first blade 21 that actually participates in the formation of the aperture is the first aperture side 2101, and the curvature of the extension section of the first aperture side 2101 on the first blade 21 may not be defined in detail.

[0067] Please refer to Figure 3 In a specific embodiment, the fixing component 10 includes a base 14 and an aperture carrier 12 arranged along a reference axis, and the two are fixedly connected. The aperture carrier 12 is provided with a light-through hole 123. When the aperture component 20 is in a large aperture state, the light-through hole 123 forms an aperture, and the projections of the first blade 21 and the second blade 22 are located outside the light-through hole 123. The axis of the light-through hole 123 can be used as a reference axis.

[0068] Please refer to Figure 8 and Fig. 9 In a specific embodiment, the fixing assembly 10 includes an aperture carrier 12, and the aperture carrier 12 is provided with a light hole 123, at least a portion of which is used to form an aperture. The aperture carrier 12 blocks a portion of the first aperture side 2101 and the second aperture side 2201, so that apertures of different sizes are close to a circle. The light passing through the nearly circular aperture forms a soft out-of-focus image.

[0069] In the exemplary embodiment, the curvature of the first aperture side 2101 gradually decreases from one end of the first aperture side 2101 close to the first rotation axis 23 to the other end. Since the first blade 21 and the second blade 22 rotate relative to the first rotation axis 23, when the first aperture side 2101 and the second aperture side 2201 rotate toward each other, the area enclosed by the two in the vertical plane of the axis of the first rotation axis 23 becomes smaller, and the area is mainly formed by the parts of the two close to the first rotation axis 23, so the curvature of the end of the first aperture side 2101 close to the first rotation axis 23 is larger, so that the corresponding aperture edge can be closer to a circle; when the first aperture side 2101 and the second aperture side 2201 rotate away from each other, the area enclosed by the two in the vertical plane of the axis of the first rotation axis 23 becomes larger, and the parts of the two away from the first rotation axis 23 are also used to enclose the area, so the curvature of the end of the first aperture side 2101 away from the first rotation axis 23 is smaller, so that the corresponding aperture edge can be closer to a circle. At the same time, the curvature of the second aperture side 2201 may gradually decrease from one end of the second aperture side 2201 close to the first rotation axis 23 to the other end. Of course, the curvatures of the first aperture side 2101 and the second aperture side 2201 may not change, that is, they are both arcs; or, they may be curves or broken lines of other forms.

[0070] In an exemplary embodiment, the curvature of the first aperture side 2101 gradually increases from one end of the first aperture side 2101 close to the first rotation axis 23 to the other end, and the variable aperture device is suitable for forming a narrow and long aperture such as a slit type and a cat's eye type.

[0071] In an exemplary embodiment, along the second aperture side 2201 from one end close to the first rotation axis 23 to the other end, the curvature of the second aperture side 2201 is the same as the curvature of the first aperture side 2101. In the vertical plane of the axis of the first rotation axis 23, the projection of the second aperture side 2201 is the same as the projection of the first aperture side 2101, and the area enclosed between the two is an axisymmetric area, and the aperture finally formed is closer to a circle. At the same time, the axisymmetric area is convenient for cooperating with other components of the variable aperture device to form an aperture of a preset shape. Of course, in the vertical plane of the axis of the first rotation axis 23, the projection of the second aperture side 2201 and the projection of the first aperture side 2101 can also be different.

[0072] In an exemplary embodiment, the ratio of the maximum curvature to the minimum curvature of the first aperture side 2101 is not greater than 4. Fig.10 and Fig.11The first aperture side 2101 has a large curvature transition range, which is suitable for forming an aperture with a large aperture variation range. At the same time, the portion with a small curvature on the first aperture side 2101 can also be used to form an aperture with a larger size. Exemplarily, the first aperture side 2101 has a large curvature at one end close to the first rotation axis 23, and the fixing component 10 is provided with a light hole 123. In the vertical plane of the axis of the first rotation axis 23, the end of the light hole 123 away from the first rotation axis 23 is used to form an aperture.

[0073] Between the maximum curvature and the minimum curvature, the curvature of the first aperture side 2101 may change uniformly, which is applicable to a variable aperture device with a controllable aperture size. Exemplarily, the curvature of the first aperture side 2101 may also have other changing modes, which is applicable to a variable aperture device with only a large aperture and a small aperture.

[0074] In an exemplary embodiment, one of the first blade 21 and the fixed component 10 is provided with a first sliding groove, and the other is provided with a first sliding column, the axis of the first sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the first sliding column is in contact with the side wall of the first sliding groove; one of the second blade and the fixed component 10 is provided with a second sliding groove, and the other is provided with a second sliding column, the axis of the second sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the second sliding column is in contact with the side wall of the second sliding groove. With the first sliding groove as a reference, the first sliding column can slide under the restriction of the side wall of the first sliding groove, and the sliding track of the first sliding column coincides with the extension track of the first sliding groove; with the second sliding groove as a reference, the second sliding column can slide under the restriction of the side wall of the second sliding groove, and the sliding track of the second sliding column coincides with the extension track of the second sliding groove. When the first blade 21 moves relative to the fixed component 10, it can rotate along the axis of the first sliding column, and when the second blade 22 moves relative to the fixed component 10, it can rotate along the axis of the second sliding column.

[0075] Please refer to Figures 5 to 7 In a specific embodiment, the first blade 21 is provided with a first blade column 211a (i.e., a first sliding column), the second blade 22 is provided with a second blade column 221a (i.e., a second sliding column), and the fixing assembly 10 includes an aperture carrier 12, and the aperture carrier 12 is provided with a first plate groove 121a and a second plate groove 122a. The first blade column 211a is fixedly connected or rotationally connected to the first blade 21, and the axis of the first blade column 211a is parallel to the axis of the first rotating shaft 23, and the axis of the second blade column 221a is parallel to the axis of the first rotating shaft 23.

[0076] Please refer to Figures 15 to 18In a specific embodiment, the first blade 21 is provided with a first blade groove 211b, the second blade 22 is provided with a second blade groove 221b, and the aperture carrier 12 is provided with a first plate column 121b and a second plate column 122b (i.e., a first sliding column and a second sliding column). Exemplarily, the first blade groove 211b does not penetrate the first blade 21 in the thickness direction, and the second blade groove 221b does not penetrate the second blade 22 in the thickness direction. In this way, light leakage can be prevented, and at the same time, the outer peripheral dimensions of the first blade 21 and the second blade 22 are small in the horizontal direction. Exemplarily, when the aperture assembly 20 is in a small aperture state, the projection of the first blade groove 211b and the second blade groove 221b is located outside the large aperture. At this time, the first blade groove 211b and the second blade groove 221b can penetrate the corresponding blades, because the thickness of the blades is usually thin, and the through grooves are easy to process.

[0077] According to an embodiment of the present application, the fixing assembly 10 has a reference axis, and when the first blade 21 moves, the projection position of the centroid of the aperture in the vertical plane of the reference axis is fixed. Exemplarily, the reference axis coincides with the optical axis, and the centroid of the aperture is always located at the reference axis. With the projection point of the axis of the first rotating shaft 23 as a reference, when the first blade 21 and the second blade 22 rotate relative to each other, the centroid of the aperture moves relative to the projection point of the axis of the first rotating shaft 23, and when the shape of the first aperture side 2101 is different, the corresponding movement amount of the centroid is also different, and users usually expect the centroid of the aperture to be located at the optical axis.

[0078] In the exemplary embodiment, the fixing assembly 10 is provided with a first sliding groove, and the first blade 21 is provided with a first sliding column. A first Cartesian coordinate system is provided in a vertical plane of the axis of the first rotating shaft 23, the first Cartesian coordinate system has a first origin and a first Y axis, and a point of the extension track of the first sliding groove has a horizontal coordinate X1 and a vertical coordinate Y1 in the first Cartesian coordinate system. The distance between the starting point (x1, y1) of the extension track of the first sliding groove and the first origin is R1, then

[0079] When the aperture assembly 20 is in a large aperture state, the axis of the first sliding column is located at the starting point of the extension track of the first sliding groove, the projection of the axis of the first rotating shaft 23 coincides with the first origin, and the centroid of the aperture is located at the positive half axis of the first Y axis. It can be seen that the first sliding column moves along the extension track of the first sliding groove. The angle between the line connecting the projection point of the axis of the first sliding column and the projection point of the first rotating shaft 23 and the positive direction of the first Y axis is θ. When the first blade 21 rotates, θ changes continuously. The change in the distance between the centroid of the aperture and the projection point of the axis of the first rotating shaft 23 is f(θ), and the change f(θ) is a function related to θ.

[0080] The coordinates of the projection point of the first rotation axis 23 are (0, f(θ)), and the length of the aforementioned connecting line is always R1. It can be seen that the coordinates of each point on the motion trajectory of the first sliding column, that is, the horizontal coordinate X1 and the vertical coordinate Y1 of the point on the extension trajectory of the first sliding groove, satisfy:

[0081]

[0082] The first sliding groove arranged in such a trajectory has a continuous and smooth extension trajectory, and the aperture assembly 20 moves smoothly. The change amount f(θ) can be adjusted by manufacturing different specific forms of the aperture assembly 20. The change amount f(θ) acts as a first correction coefficient to affect the result of the above formula. By adjusting the change amount f(θ), the first rotating shaft 23 can be moved relative to the reference axis to compensate for the movement of the centroid relative to the reference axis when the aperture size changes.

[0083] For example, when the aperture assembly 20 is in the large aperture state, an auxiliary circle is drawn with the first origin (the projection point of the axis of the first rotation axis 23 in the first Cartesian coordinate system) as the center and R1 as the radius. The points of the auxiliary circle have abscissa X0 and ordinate Y0 in the first Cartesian coordinate system. Then The angle between the line connecting the point (X0, Y0) on the auxiliary circle and the first origin and the positive direction of the first Y axis is the parameter angle θ0. It can be seen that θ = θ0, which satisfies:

[0084] X1=X0=R1sinθ; (0°<θ<360°)

[0085] Y1=Y0+f(θ)=R1cosθ+f(θ); (0°<θ<360°).

[0086] It can be seen that the extension trajectory of the first sliding groove is the formula For a section of the corresponding curve, by adjusting the starting point of the extension track of the first sliding slot, the setting position of the first sliding post is correspondingly adjusted, so that the first blade 21 can achieve the same translation and rotation compound motion relative to the fixed component 10. For example, when R1 is different, a series of mutually offset extension tracks will be obtained. For example, when the value interval length of θ is the same but the starting point is different, extension tracks located in different sections can be set. According to the actual structure of the fixed component 10, the first sliding slot can be adjusted to avoid interference or reduce the size of the aperture component.

[0087] In an exemplary embodiment, along the first aperture side 2101 from one end close to the first rotation axis 23 to the other end, the curvature of the first aperture side 2101 gradually decreases or increases, and the extension trajectory of the first sliding groove can be the above formula.

[0088] In an exemplary embodiment, please refer to Fig.13 and Fig.17, in the vertical plane of the axis of the first rotating shaft 23, the point of the extension trajectory of the second sliding groove has a horizontal coordinate X2 and a vertical coordinate Y2 in the second Cartesian coordinate system, and the horizontal coordinate X2 and the vertical coordinate Y2 satisfy:

[0089]

[0090] The second Cartesian coordinate system has a second origin and a second Y axis, θ' is the angle between the line between the point (X2, Y2) corresponding to the position of the second sliding column and the projection point of the axis of the first rotating shaft 23 and the positive direction of the second Y axis, f(θ') is used as a second correction coefficient to affect the result of the above formula, and f(θ') is specifically the change in the distance between the centroid of the aperture and the projection point of the axis of the first rotating shaft 23. The coordinates of the projection point of the first rotating shaft 23 are (0, f(θ')), R2 is the distance between the point of the extension track of the second sliding groove and the projection point of the axis of the first rotating shaft 23, and the distance between the axis of the second sliding column and the axis of the first rotating shaft 23 is R2; when the aperture assembly 20 is in the large aperture state, the projection of the axis of the first rotating shaft 23 coincides with the second origin.

[0091] In an exemplary embodiment, when the aperture assembly 20 is in a large aperture state, the extension track of the second sliding groove is symmetrical with the extension track of the first sliding groove relative to the first Y-axis. Fig.13 In one specific embodiment, R2=R1, θ′=θ, X2=-X1.

[0092] Please refer to Fig.17 and Fig.18 , the first blade 21 has a blade coordinate system, the origin of the blade coordinate system is the projection point of the axis of the first rotating shaft 23; the fixed component 10 has a fixed component coordinate system, when the aperture component 20 is in the large aperture state, the fixed component coordinate system coincides with the blade coordinate system. If the first sliding groove is set on the fixed component 10, the fixed component coordinate system is the first Cartesian coordinate system, and the extension track of the first plate groove 121a is the starting point at the lower end; if the first sliding groove is set on the first blade 21, the blade coordinate system is the first Cartesian coordinate system, and the extension track of the first blade groove 211b is the starting point at its lower end shown in the figure, when the aperture component 20 is in the large aperture state, the extension track of the first blade groove 211b coincides with the extension track of the first plate groove 121a with the same parameters.

[0093] Exemplarily, the fixing assembly 10 is provided with a first plate slot 121a and a second plate column 122b, the first blade 21 is provided with a first blade column 211a, and the second blade 22 is provided with a second blade slot 221b. In the vertical plane of the axis of the first rotating shaft 23, when the aperture assembly 20 is in the large aperture state, the first origin, the second origin and the axis of the first rotating shaft 23 coincide, the first Y axis coincides with the second Y axis, and the reference axis of the variable aperture device is located at the first Y axis (second Y axis). When the aperture assembly 20 moves, the centroid of the area enclosed by the first aperture side 2101 and the second aperture side 2201 moves linearly relative to the projection of the reference axis, please refer to Figures 15 to 18 When the fixed component includes an aperture carrier 12, the area of ​​the opening region of the aperture carrier 10 is larger than the area of ​​the region enclosed by the first aperture side 2101 and the second aperture side 2201, the region enclosed by the first aperture side 2101 and the second aperture side 2201 is the aperture, and when the variation f(θ) takes different values, the centroid of the aperture is along Fig.17 Vertical linear motion in.

[0094] In an exemplary embodiment, with reference to the fixing assembly 10, the rotation angle of the first blade 21 or the second blade 22 relative to the first rotation axis 23 is greater than 0° and less than or equal to 90°. Exemplarily, the rotation angle of the first blade 21 or the second blade 22 relative to the first rotation axis 23 is greater than 0° and less than or equal to 60°, which can make the light transmittance of the aperture larger, thereby facilitating the external device to obtain information carried by the light beam passing through the aperture.

[0095] In an exemplary embodiment, the variation f(θ) satisfies: f(θ)=0.5(R1-R1cosθ). In a specific embodiment, the first aperture side 2101 on the first blade 21 and the second aperture side 2201 on the second blade 22 are two arcs of the same shape and opposite positions. The first blade 21 and the second blade 22 are respectively set to move with the fixed component 10 according to f(θ)=0.5(R1-R1cosθ). When the aperture component 20 moves, the centroid of the area enclosed by the first aperture side 2101 and the second aperture side 2201 is fixed relative to the fixed component 10. Specifically, the centroid always coincides with the projection point of the reference axis.

[0096] Please refer to Figure 12 to Figure 14In a specific embodiment, in the vertical plane of the axis of the first rotating shaft 23, when the aperture assembly 20 is in the large aperture state, the first blade column 211 of the first blade 21 is located at the starting end of the first plate groove 121a of the aperture carrier 12, the projection of the axis of the first rotating shaft 23 is located at the first origin, and the centroid of the aperture is located at the first Y axis. The line connecting the projection point of the axis of the first blade column 211a and the projection point of the axis of the first rotating shaft 23 is the first connecting line, and the angle between the first connecting line and the positive direction of the first Y axis is θ. Taking the distance between the centroid of the aperture and the projection point of the axis of the first rotating shaft 23 when the aperture assembly 20 is in the large aperture state as the reference, the variation f(θ) is the variation of the distance at the angle θ. The extension track of the first plate groove 121a is set according to the variation f(θ).

[0097] During the process of switching the aperture assembly 20 from the large aperture state to the small aperture state, the first blade column 211a of the first blade 21 slides along the extension track of the first plate groove 121a, and the first blade 21 also rotates with the axis of the first rotation shaft 23 as the axis. Since the first rotation shaft 23 moves in the positive direction of the first Y axis, the movement of the first blade 21 relative to the aperture carrier 12 is a translation and rotation compound movement. When the first blade column 211a moves to the end end of the first plate groove 121a, the aperture assembly 20 is in the small aperture state. The movement mode of the second blade 22 is similar to that of the first blade 21. Specifically, the second blade 22 and the first blade 21 are symmetrical relative to the first Y axis, and the position of the centroid of the aperture formed by the second blade 22 and the first blade 21 relative to the aperture carrier 12 remains unchanged. Specifically, the centroid of the aperture is located at the reference axis of the fixed assembly 10.

[0098] Please refer to Figures 15 to 18 In a specific embodiment, in the vertical plane of the axis of the first rotating shaft 23, when the aperture assembly 20 is in the large aperture state, the first Cartesian coordinate system (first blade coordinate system), the second Cartesian coordinate system (second blade coordinate system) and the fixed assembly coordinate system coincide, the upper end of the first blade slot 211b of the first blade 21 is located at the first plate column 121b, and the centroid of the aperture is located at the first Y axis. The lower end point of the extension track of the first blade slot 211b is the starting point, and the line connecting the starting point and the projection point of the axis of the first rotating shaft 23 is the first connecting line. The length of the first connecting line is R1, and the angle between the first connecting line and the positive direction of the first Y axis is θ. Taking the distance between the centroid of the aperture and the projection point of the axis of the first rotating shaft 23 when the aperture assembly 20 is in the large aperture state as the reference, the variation f(θ) is the variation of the distance at the angle θ. The extension track of the first blade slot 211b is set according to the variation f(θ).

[0099] During the process of switching the aperture assembly 20 from the large aperture state to the small aperture state, the side wall of the first blade groove 211b of the first blade 21 fits with the outer periphery of the first plate column 121b, and the first blade groove 211b slides through the first plate column 121b along its own terminal end to starting end. The first blade 21 also rotates with the axis of the first rotating shaft 23 as the axis. Since the first rotating shaft 23 moves in the positive direction of the first Y axis, the movement of the first blade 21 relative to the aperture carrier 12 is a translation and rotation compound movement. When the starting end of the first blade groove 211b slides to the first plate column 121b, the aperture assembly 20 is in the small aperture state. The movement mode of the second blade 22 is similar to that of the first blade 21. Specifically, the second blade 22 and the first blade 21 are symmetrical relative to the first Y axis, and the position of the centroid of the aperture formed by the second blade 22 and the first blade 21 relative to the aperture carrier 12 remains unchanged. Specifically, the centroid of the aperture is located at the reference axis of the fixed assembly 10.

[0100] Please refer to Figures 1 to 4 In an exemplary embodiment, the first operating portion is disposed on a side of the first blade 21 that is away from the aperture side 2101; the first driving component 30 includes a coil 33 and a magnetic element 31, the coil 33 is fixed relative to the fixed component 10, the magnetic element 31 is slidably connected to the fixed component 10, the coil 33 is used to drive the magnetic element 31 to slide, and the magnetic element 31 is used to apply force to the first operating portion.

[0101] When the coil 33 is energized, a magnetic field is formed, and the magnetic element 31 can be magnetized as a whole, or can include a permanent magnet 311 or a coil 33. The magnetic element 31 moves under the action of the magnetic field and drives the first blade 21. The coil 33 and the magnetic element 31 are small in size and occupy little space.

[0102] The magnetic element 31 has an operating hole 312, and the first operating portion of the first blade 21 is inserted into the operating hole 312. Figure 3 As shown, the axis of the first rotating shaft 23 is perpendicular to the paper surface, the first blade 21 and the second blade 22 are suitable for sliding and rotating in the paper surface, the magnetic element 31 slides up and down relative to the fixed component 10, and the operating hole 312 is used to apply force to the first operating part, thereby driving the first blade 21 and linking the second blade 22.

[0103] In an exemplary embodiment, the first operating portion includes a joystick 212. Figure 3 The plane shown is a horizontal plane, and the joystick 212 and the first blade 21 are at different heights, which can facilitate the placement of the first drive assembly 30 and prevent the first blade 21 from interfering with the first motion assembly during movement. The joystick 212 and the first blade 21 can be integrally formed or fixedly connected by other means.

[0104] In an exemplary embodiment, please refer to Figure 5The first driving component 30 also includes a first elastic element 32, one end of which is connected to the fixed component 10, and the other end is connected to the magnetic element 31. The first elastic element 32 passively provides force to the magnetic element 31. When the intensity of the current delivered to the coil 33 changes, the intensity of the magnetic field generated by the coil 33 also changes, thereby causing the magnetic element 31 to be subjected to magnetic forces of different magnitudes. After being subjected to the elastic force of the first elastic element 32, the magnetic element 31 can be balanced at a set position relative to the fixed component 10. In this way, by adjusting the magnitude of the current delivered to the coil 33, the position of the magnetic element 31 can be controlled, thereby relatively limiting the position and swing angle of the first blade 21 and the second blade 22. This allows the aperture assembly 20 to be used to form apertures of other sizes during the process of switching between the large aperture state and the small aperture state.

[0105] In an exemplary embodiment, the variable aperture device is provided with a second driving assembly, and the second driving assembly is used to drive the second blade. Exemplarily, the second blade 22 is provided with a second operating part, and the second driving assembly is used to drive the second operating part to limit the position and swing angle of the second blade 22 relative to the fixed component 10. The aperture assembly 20 of the variable aperture device can be controlled to change continuously, and the variable aperture device can provide a continuously changing aperture.

[0106] In an exemplary embodiment, the variable aperture device is provided with a second driving assembly, the first blade 21 is provided with a second operating part, and the second driving assembly is used to drive the second operating part to limit the position and swing angle of the first blade 21 relative to the fixed assembly 10. The aperture assembly 20 of the variable aperture device can be controlled to continuously change, and the variable aperture device can provide a continuously changing aperture.

[0107] In an exemplary embodiment, please refer to Fig.19 , the variable aperture device is also provided with a second elastic element 34, and the first blade 21 is provided with a second operating portion 213; one end of the second elastic element is fixedly connected to the second operating portion 213, and the other end is fixedly connected to the fixed assembly 10 or the second blade 22. Exemplarily, the second operating portion 213 is provided at one end of the first blade 21 away from the first rotating shaft 23. Specifically, the second operating portion 213 can be on the outer side of the upper surface of the first blade 21, or on the side facing away from the aperture. One end of the second elastic element 34 is fixedly connected to the second operating portion 213, and the other end is fixedly connected to the part of the fixed assembly 10 located in the direction facing away from the aperture of the first blade 21. The second elastic element 34 is always stretched to generate tension. When the first driving assembly 30 is not working, the aperture assembly is in a large aperture state. Exemplarily, when the second elastic element 34 provides thrust and the first driving assembly 30 is not working, the aperture assembly is in a small aperture state.

[0108] Exemplarily, the first elastic element 32 and the second elastic element 34 may be provided at the same time. Exemplarily, the first elastic element 32 and the second elastic element 34 may include one or more of a spring, a suspension wire or a spring sheet. Multiple first elastic elements or second elastic elements 34 may be provided, and multiple second operating parts 213 may also be provided.

[0109] In an exemplary embodiment, the first driving assembly includes a first shape memory body and a second shape memory body, and the first operating part includes a first pin 212a and a second pin 213a; one end of the first shape memory body is connected to the fixed assembly 10, and the other end is rotatably connected to the first pin 212a; one end of the second shape memory body is connected to the fixed assembly 10, and the other end is rotatably connected to the second pin 213a. The material of the first shape memory body and the material of the second shape memory body are shape memory alloys (ShapeMemory Alloys, SMA). The metallographic structure of the SMA material is martensite at low temperature. When heated to the phase transition temperature, the metallographic structure of the SMA material is transformed into austenite. The phase transition causes the stress in the SMA material to increase and shrinkage deformation occurs. The phase transition temperature of the SMA material is a range, which usually exceeds the upper limit of the range when the temperature is increased and exceeds the lower limit of the range when the temperature is reduced. The two ends of the shape memory body move relative to each other under the action of their own stress, so the space occupied is small, so that the volume of the variable aperture device of this embodiment is small.

[0110] In an exemplary embodiment, please refer to Fig. 20 and Fig.21 , a first pin 212a and a second pin 213a are provided at one end of the first blade 21 away from the first rotation axis 23, and the axes of the first pin 212a and the second pin 213a are respectively parallel to the axis of the first rotation axis 23. The first shape memory body is a first shape memory wire 30a, which is folded in half, and the two ends of the first shape memory wire 30a are regarded as one end of the first shape memory body, which is fixedly connected to the fixing component 10; the middle section of the first shape memory wire 30a is regarded as the other end of the first shape memory body, which is wound around the outer periphery of the first pin 212a. The second shape memory body is a second shape memory wire 30b, which is provided with reference to the first shape memory body, and the connection between the second shape memory body and the fixing component 10 is in the direction of the first blade 21 facing away from the aperture, and the connection between the first shape memory body and the fixing component 10 is in the direction of the first blade 21 facing the aperture.

[0111] When the temperature of the first shape memory wire 30a or the second shape memory wire 30b exceeds the phase transition temperature, the first blade 21 will be pulled. When the first shape memory wire 30a contracts, the aperture assembly 20 is in a small aperture state, and when the second shape memory wire 30b contracts, the aperture assembly 20 is in a large aperture state. By controlling the temperatures of the first shape memory wire 30a and the second shape memory wire 30b at the same time, and then controlling the deformation of the two, the first blade 21 can be maintained at a preset equilibrium position, so that the aperture assembly 20 has apertures of different sizes. The variable aperture device of this embodiment can achieve continuous and precise adjustment of the aperture size.

[0112] Specifically, the variable aperture device provided in the embodiment of the present application includes a heating device, and the heating device is used to heat the first shape memory wire 30a and the second shape memory wire 30b respectively.

[0113] Specifically, two ends of the first shape memory wire 30 a are electrically connected to an external power source, and two ends of the second shape memory wire 30 b are electrically connected to a power source.

[0114] Please refer to Fig. 22 In a specific embodiment, the fixing assembly 10 includes an aperture carrier 12 and a base 14, the aperture carrier 12 is located above the base 14, the first blade 21 is located above the aperture carrier 12, and two ends of the first shape memory wire 30a are fixed to the side wall of the base 14. It is easier to connect the wire ends to the power supply by setting the side wall of the base 14. An anti-wear pad 141 is provided between the corner of the base 14 and the first shape memory wire 30a to prevent the first shape memory wire 30a from being worn.

[0115] In an exemplary embodiment, one end of the first shape memory wire 30a is fixedly connected to the fixed assembly 10, and the other end is fixedly connected to the first pin 212a, and one end of the second shape memory wire 30b is fixedly connected to the fixed assembly 10, and the other end is fixedly connected to the second pin 213a. Although the first pin 212a or the second pin 213a moves in an arc relative to the fixed assembly 10 when the aperture assembly 20 moves, the first shape memory wire 30a and the second shape memory wire 30b can be deformed, so it is considered that the first shape memory wire 30a is rotationally connected to the first pin 212a, and the second shape memory wire 30b is rotationally connected to the second pin 213a. The variable aperture device provided in this embodiment occupies a small space and saves shape memory materials. Exemplarily, the first pin 212a and the second pin 213a can be a hook respectively.

[0116] In an exemplary embodiment, the fixing assembly 10 includes a slider, one end of the first shape memory body is fixedly connected to the fixing assembly 10, and the other end is fixedly connected to the slider, and the slider is provided with an operating hole 312. The first blade 21 includes an operating rod 212, and the operating rod 212 is inserted into the operating hole 312, and the movement of the first blade 21 can be controlled by controlling the distance change between the two ends of the first shape memory body. Exemplarily, the variable aperture device provided in this embodiment also includes a second elastic member 34, and the first blade 21 is further provided with a second operating portion 213, and one end of the second elastic member 34 is fixedly connected to the fixing assembly, and the other end is fixedly connected to the second operating portion 23.

[0117] In an exemplary embodiment, the first driving assembly is used to drive the first rotating shaft 23 to move radially along the first rotating shaft 23, so that the aperture assembly 20 switches between a large aperture state and a small aperture state. The first rotating shaft 23 can simultaneously drive the first blade 21 and the second blade 22 connected to the first rotating shaft 23 to rotate. The first blade 21 and the second blade 22 rotate while following the movement of the first rotating shaft 23 and being restricted by the fixing assembly 10, so as to achieve a change in the size of the aperture. Exemplarily, the first rotating shaft 23 moves toward the reference axis.

[0118] In an exemplary embodiment, the variable aperture device provided by the present application includes a plurality of second blades 22, the first blade 21 is rotatably connected to the plurality of second blades 22 via a first rotating shaft 23, the second aperture sides of the plurality of second blades 22 are respectively used to form an aperture, the driving assembly 30 can drive the aperture assembly 20 to continuously change between a large aperture state and a small aperture state and can stay there to form apertures of different sizes, and the aperture sides formed by the plurality of second blades 22 better fit the desired aperture shape.

[0119] In an exemplary embodiment, the variable aperture device provided by the present application further includes a secondary blade, which is rotatably connected to the second blade via a second rotation axis, and is slidably connected to the fixing assembly 20 , and includes a third aperture side for forming an aperture.

[0120] Please refer to Fig.23 The manufacturing method of the variable aperture device comprises the following steps:

[0121] S100, slidingly engaging the aperture assembly 20 with the fixing assembly 10, wherein the aperture assembly 20 includes a first blade 21 and a second blade 22 that are rotatably connected;

[0122] S200: connecting the first driving assembly 30 to the first blade 21 by power, and connecting the first driving assembly 30 to the fixing assembly 10;

[0123] S300: The first driving assembly 30 drives the first blade 21 to move, so that the aperture assembly 20 is in a large aperture state or a small aperture state as a default state. Generally, when the first driving assembly 30 is not working, the aperture assembly 20 is in the default state. Optionally, when the first driving assembly 30 is not working, the aperture assembly 20 maintains the current state.

[0124] In an exemplary embodiment, the fixing assembly 10 includes an aperture carrier 12 and a housing 11; the aperture assembly 20 is slidably engaged with the aperture carrier 12; before the first driving assembly 30 drives the first blade 21 to move, the housing 11 is snapped onto the aperture carrier 12, and the aperture assembly 20 is located in the gap between the aperture carrier 12 and the housing 11. The first driving assembly 30 may also be located in the gap.

[0125] In an exemplary embodiment, one of the first blade 21 and the housing 11 is provided with a first sliding groove, and the other is provided with a first sliding post; one of the second blade 22 and the housing 11 is provided with a second sliding groove, and the other is provided with a second sliding post.

[0126] The embodiment of the present application also provides a camera module, including at least one lens and the aforementioned variable aperture device, the variable aperture device being arranged on the object side or the image side of the lens. The camera module provided by the embodiment of the present application is small in size, has a large aperture and a small aperture, so that the camera module can be applied to different shooting scenes, and the light beam passing through the camera module has different light input amounts, and the image formed has different effects. In addition, when the variable aperture device is arranged on the object side of the lens, a smaller aperture can play a sufficient effect, so the portion of the first blade 21 and the second blade 22 covering the aperture can be smaller, and then the camera module size is small.

[0127] In an exemplary embodiment, please refer to Figure 2 The camera module includes a lens 13 and a variable aperture device, the variable aperture device includes a fixed assembly 10, an aperture assembly 20 and a first driving device 30, and the fixed assembly 10 includes a housing 11, an aperture carrier 12 and a base 14. The mounting hole of the base 14 is used to penetrate the lens 13, the lens 13 has an optical axis, the optical axis of the lens 13 coincides with the reference axis of the fixed assembly 10, the aperture carrier 12 is arranged on the lens 13 along the reference axis, the aperture assembly 20 is arranged on the aperture carrier 12, and the first driving assembly 30 is arranged on the base 14. The base 14 and the housing 11 form an accommodating space, at least the aperture assembly 20 is located in the accommodating space, and the housing 11 includes a through hole passing through along the reference axis. Exemplarily, when the variable aperture device includes a second elastic element 34, the second elastic element 34 can be fixedly connected to one or more of the housing 11, the aperture carrier 12 or the base 14. The housing 11 or the base 14 can also be used to cooperate with external components.

[0128] In the field of aperture device technology, the aperture value is the ratio of the focal length of the lens to the effective aperture of the lens. The camera module provided in this embodiment can adjust the aperture value of the camera module by adjusting the aperture size of the variable aperture device when the focal length of the lens is constant. When the aperture is circular, the diameter of the aperture is the effective aperture; when the shape of the aperture is non-circular, the diameter of the circumscribed circle of the aperture is taken as the effective aperture; when the area of ​​the aperture is much different from the area of ​​the circumscribed circle, such as when the ratio of the area of ​​the aperture to the area of ​​the circumscribed circle is less than 80%, an equivalent circle with an area equal to the area of ​​the aperture is taken, and the diameter of the equivalent circle is the effective aperture.

[0129] In an exemplary embodiment, the camera module is one of a periscope camera module, a zoom module, a fixed focus module, or a coordinated lens module.

[0130] In an exemplary embodiment, the camera module is a periscope camera module, which includes a light redirecting device and a lens assembly. The light redirecting device can be a prism, a reflector, etc., which is used to redirect light. The light redirecting device has a light entrance surface and a light exit surface. The lens assembly includes a group of lenses arranged along the optical axis, and the optical axis of the lens assembly corresponds to the light exit surface of the light redirecting device. The variable aperture device is arranged between the light redirecting device and the module assembly.

[0131] In an exemplary embodiment, the camera module is a zoom module (ZOOM), which can be manual zoom or automatic zoom. The zoom module includes at least two lens groups, and the focal length of the optical system is adjusted by adjusting the distance between the multiple lens groups. The variable aperture device is arranged between any two lens groups.

[0132] In an exemplary embodiment, the camera module is a fixed focus module (FF) or an auto focus module (AF), and the fixed focus module or the auto focus module is provided with a split lens, which includes a plurality of lens components, and the lens components include a lens barrel and a lens, and the imaging quality of the lens meets a set threshold by adjusting the relative positions of the plurality of lens components, and then the plurality of lens components are fixedly connected. The variable aperture device is provided between any two lens components.

[0133] In an exemplary embodiment, the camera module is a tunable lens module, which includes at least one tunable lens and at least one lens component. The variable aperture device is arranged between the tunable lens and the lens component, or between the tunable lenses, or between the lens components.

[0134] The embodiment of the present application further provides an electronic device, comprising the aforementioned camera module. In an exemplary embodiment, the electronic device can be any appropriate device, such as a mobile phone, a tablet, a computer, or an e-book reader.

[0135] The exemplary embodiments of the present application are described above with reference to the accompanying drawings. It should be understood by those skilled in the art that the above embodiments are examples given for illustrative purposes only and are not intended to limit the scope of the present application. Any modifications, equivalent substitutions, etc. made under the teachings of the present application and the scope of protection of the claims shall be included in the scope of protection claimed in the present application.

Claims

1. A variable aperture device, characterized in that: include: Fixing components; An aperture assembly, comprising at least a first blade and a second blade to form an aperture, wherein the first blade and the second blade are rotatably connected via a first rotating shaft, and the first blade drives the second blade to slide together in the fixing assembly, so that the aperture assembly has a large aperture state and a small aperture state; as well as a first driving assembly, driving the first blade to move, so that the aperture assembly switches between the large aperture state and the small aperture state; A first operating part is arranged on a side of the first blade facing away from the aperture, the first driving assembly comprises a coil and a magnetic element, the magnetic element has an operating hole, the first operating part is penetrated through the operating hole, the coil is fixed relative to the fixing assembly, the magnetic element is slidably connected to the fixing assembly, the coil is used to drive the magnetic element to slide along an axial direction perpendicular to the first rotating shaft, and the magnetic element is used to apply a force to the first operating part; One of the first blade and the fixing assembly is provided with a first sliding groove, and the other is provided with a first sliding column, the axis of the first sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the first sliding column is in contact with the side wall of the first sliding groove; One of the second blade and the fixing assembly is provided with a second sliding groove, and the other is provided with a second sliding column, the axis of the second sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the second sliding column is in contact with the side wall of the second sliding groove.

2. The variable aperture device according to claim 1, characterized in that: The fixing assembly comprises a light-through hole, at least a portion of which is used to form the aperture.

3. The variable aperture device according to claim 1, characterized in that: The first blade has a first aperture side for forming the aperture, and a curvature of the first aperture side gradually decreases from one end to the other end of the first aperture side.

4. The variable aperture device according to claim 3, characterized in that: The second blade has a second aperture side for forming the aperture, and a curvature of the second aperture side along one end toward the other end of the second aperture side is the same as a curvature of the first aperture side.

5. The variable aperture device according to claim 3, characterized in that: The ratio of the maximum curvature to the minimum curvature of the first aperture side is no greater than 4.

6. The variable aperture device according to claim 1, characterized in that: The fixing assembly has a reference axis, and when the first blade moves, the centroid of the aperture is located on the reference axis.

7. The variable aperture device according to claim 1, characterized in that: A first Cartesian coordinate system is provided in a vertical plane of the axis of the first rotation axis, the first Cartesian coordinate system has a first origin and a first Y axis, and a point of the extension track of the first sliding groove has a horizontal coordinate X1 and a vertical coordinate Y1 in the first Cartesian coordinate system; When the aperture assembly is in a large aperture state, the projection point of the axis of the first rotating shaft coincides with the first origin, the axis of the first sliding column is located at the starting point of the extension track of the first sliding slot, and the centroid of the aperture is located at the positive half axis of the first Y axis; The distance between the starting point of the extension track of the first sliding groove and the first origin is R1, the angle between the line connecting the projection point of the axis of the first sliding column and the projection point of the first rotating axis and the positive direction of the first Y axis is θ, and the change in the distance between the centroid of the aperture and the projection point of the axis of the first rotating axis 23 is f(θ); The horizontal coordinate X1 and the vertical coordinate Y1 satisfy:

8. The variable aperture device according to claim 7, characterized in that: The variation f(θ) satisfies: f(θ)=0.5(R1-R1cosθ).

9. The variable aperture device according to claim 7, characterized in that: When the aperture assembly is in a large aperture state, an extension track of the second sliding slot is symmetrical with respect to the first Y-axis with respect to an extension track of the first sliding slot.

10. The variable aperture device according to claim 1, characterized in that: The variable aperture device is provided with a second driving assembly, and the second driving assembly is used to drive the second blade.

11. The variable aperture device according to claim 1, characterized in that: The first driving component also includes a first elastic element, one end of the first elastic element is connected to the fixing component, and the other end of the first elastic element is connected to the magnetic element.

12. The variable aperture device according to claim 1, characterized in that: The variable aperture device is further provided with a second elastic element, and the first blade is provided with a second operating part; One end of the second elastic element is fixedly connected to the second operating portion, and the other end of the second elastic element is fixedly connected to the fixing assembly or the second blade.

13. The variable aperture device according to claim 1, characterized in that: The first drive assembly includes a first shape memory body and a second shape memory body, and the first blade is provided with a first pin and a second pin; One end of the first shape memory body is connected to the fixing assembly, and the other end is rotatably connected to the first pin; One end of the second shape memory body is connected to the fixing assembly, and the other end is rotatably connected to the second pin.

14. The variable aperture device according to claim 1, characterized in that: The first driving assembly is used to drive the first rotating shaft to move radially along the first rotating shaft, so that the aperture assembly switches between the large aperture state and the small aperture state.

15. A camera module, characterized in that: The invention comprises at least one lens and a variable aperture device as claimed in any one of claims 1 to 14, wherein the variable aperture device is arranged on the object side or the image side of the lens.

16. The camera module according to claim 15, characterized in that: The camera module is one of a periscope camera module, a zoom module, a fixed focus module, an automatic focus module or a coordinated lens module.

17. An electronic device, characterized in that Comprising a camera module as described in claim 15.

18. A method for manufacturing a variable aperture device, characterized in that: The steps include: Slidingly engaging an aperture assembly with a fixed assembly, wherein the aperture assembly includes a first blade and a second blade rotatably connected via a first rotation axis; Dynamically connect the first drive assembly to the first blade, and connect the first drive assembly to the fixing assembly; The first driving assembly drives the first blade to move, so that the aperture assembly is in a large aperture state or a small aperture state as a default state; Wherein, a first operating part is arranged on a side of the first blade facing away from the aperture, the first driving assembly comprises a coil and a magnetic element, the magnetic element has an operating hole, the operating hole is penetrated by the first operating part, the coil is fixed relative to the fixing assembly, the magnetic element is slidably connected to the fixing assembly, the coil is used to drive the magnetic element to slide along an axial direction perpendicular to the first rotating shaft, and the magnetic element is used to apply a force to the first operating part; One of the first blade and the fixing assembly is provided with a first sliding groove, and the other is provided with a first sliding column, the axis of the first sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the first sliding column is in contact with the side wall of the first sliding groove; One of the second blade and the fixing assembly is provided with a second sliding groove, and the other is provided with a second sliding column, the axis of the second sliding column is parallel to the axis of the first rotating shaft; the outer periphery of the second sliding column is in contact with the side wall of the second sliding groove.

19. The method for manufacturing a variable aperture device according to claim 18, wherein: The fixing assembly includes an aperture carrier and a housing; The aperture assembly is slidably engaged with the aperture carrier; Before the first driving assembly drives the first blade to move, the housing is snapped onto the aperture carrier, and the aperture assembly is located in a gap between the aperture carrier and the housing.

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