500. In rotation of the blade driving ring 500, the plurality of light-shielding blades 600 are driven to be gathered or separated from each other. The blade supporting member 700 is buckled and fixed on an object side of the lens supporting frame 300. The plurality of light-shielding blades 600 are disposed between the blade driving ring 500 and the blade supporting member 700. The plurality of light-shielding blades 600 are rotatably connected to the blade supporting member 700, and the blade supporting member 700 is used for supporting the plurality of light-shielding blades 600.

Compared with related technologies, in embodiments of the present disclosure, the base 200 is provided with the driving member 210, the driving member 210 is configured to drive the lens supporting frame 300 to move and focus along the optical axis direction, the driving member 210 is further configured to drive the blade driving frame 400 to rotate around the optical axis, and the blade driving frame 400 drives the blade driving ring 500 to rotate synchronously during rotating of the blade driving frame 400. The blade driving ring 500 drives the plurality of light-shielding blades 600 to be gathered or be separated from each other, thereby realizing adjustment of a size of an opening surrounded by the plurality of light-shielding blades 600. That is, since the plurality of light-shielding blades 600 are driven by the driving member 210 and focusing of the camera lens 100 is also driven by the driving member 210, the number of elements in the camera module 1000 can be reduced, thereby reducing the volume and weight of the camera module 1000, and avoiding interference between the structure for focusing in the camera module 1000 and a power mechanism for driving the light-shielding blades 600.

The following describes the implementation details of the camera module of embodiments in detail. The following content is only for the convenience of understanding the implementation details provided, and is not necessary to implement this solution.

In embodiments of the disclosure, the base 200, the blade driving frame 400, the blade driving ring 500, the plurality of light-shielding blades 600, and the blade supporting member 700 are sequentially arranged in a direction from an image side toward an object side of the camera module 1000. That is, those components are sequentially arranged in the optical axis direction, so that the camera module 1000 can be assembled along the extending direction of the optical axis, thereby reducing the difficulty of assembly and avoiding multi-direction protrusion of the components.

It shall be understood that the camera lens 100 includes a lens 110 and a lens barrel 120. The lens 110 is fixed to an inner wall of the lens barrel 120, and the lens barrel 120 is used to protect the lens 110 to prevent the lens 110 from being damaged. The lens barrel 120 can also provide a space to allow the camera lens 100 to be connected to the lens supporting frame 300. That is, the lens supporting frame 300 is sleeved and fixed on an outer wall of the lens barrel 120.

Referring to FIG. 6, in this embodiment, the base 200 defines at least three arc-shaped first accommodating grooves 220 on a side of the base 200 facing the blade driving frame 400, where the arc-shaped first accommodating groove means that the first accommodating groove is extended in an arc shape. The blade driving frame 400 defines at least three arc-shaped second accommodating grooves 410 on a side of the blade driving frame 400 facing the base 200, where the arc-shaped second accommodating groove means that the second accommodating groove is extended in an arc shape. The first accommodating grooves 220 and the second accommodating grooves 410 are arranged in one-to-one correspondence, and each first accommodating groove 220 and a respective second accommodating groove 410 define an accommodating space. A spherical supporting member 230 is disposed in the accommodating space and abuts against an inner wall of the first accommodating groove 220 and an inner wall of the respective second accommodating groove 410 concurrently. That is, when the driving member 210 drives the blade driving frame 400 to rotate, the spherical supporting member 230 can function as supporting the blade driving frame 400 and can support smoothly rotation of the blade driving frame 400 by means of rolling of the spherical supporting member 230. Alternatively, there may be four first accommodating grooves 220 and four second accommodating grooves 410, and the four first accommodating grooves 220 and four second accommodating grooves 410 are provided in one-to-one correspondence. Correspondingly, there may be also four spherical supporting members 230 provided.

Specifically, the first accommodating grooves 220 and the second accommodating grooves 410 are arranged around the optical axis and spaced apart from one another. The plurality of the first accommodating grooves 220 may or may not be arranged on a same circular trajectory, preferably arranged on the same circular trajectory. Similarly, the plurality of the second accommodating grooves 410 may or may not be arranged on a same circular trajectory, preferably arranged on the same circular trajectory.

In other feasible embodiments, there may be provided as three first accommodating grooves 220 and three second accommodating grooves 410, and thus there may be also three spherical supporting members 230 provided, where each of the three spherical supporting members 230 is accommodated in a respective accommodating space of the accommodating spaces. In this way, the blade driving frame 400 can be kept stable while being able to rotate relative to the base 200 when subjected to a force, and the blade driving frame 400 can be prevented from turning over in the extending direction of the optical axis. Furthermore, the number of the spherical supporting members 230 may be further reduced and the weight of the camera module 1000 may be further reduced.

It is to be noted that the number and position of the first accommodating grooves 220, the second accommodating grooves 410, and the spherical supporting members 230, and the number of the spherical supporting member 230 in each of the plurality of accommodating grooves can be determined according to the actual force demand, all of which belong to the idea of the present disclosure, which is not specifically limited in the present disclosure.

In this embodiment, the lens supporting frame 300 is provided with a first slave driven member (follower) 310, and the driving member 210 is configured to drive the first slave driven member 310 to move, to drive the lens supporting frame 300 to move and focus along the optical axis direction. The blade driving frame 400 is provided with a second slave driven member 420, and the driving member 210 is configured to drive the second slave driven member 420 to rotate, to drive the blade driving frame 400 to rotate. That is, the driving member 210 applies a force to the first slave driven member 310 for movement of the camera lens 100 to achieve focusing. Since the first slave driven member 310 is fixed to the lens supporting frame 300, the lens supporting frame 300 is driven to move. In addition, since the camera lens 100 is fixed to the lens supporting frame 300, the camera lens 100 also follows the movement of the lens supporting frame 300 to realize focusing. The driving member 210 applies a force to the second slave driven member 420 to cause the blade driving frame 400 to rotate with the optical axis as the rotating axis. The forces applied to the first slave driven member 310 and the second slave driven member 420 do not interfere with each other, thereby avoiding the interaction between the focusing movement and the blade movement.

Furthermore, the driving member 210 is a magnetic steel (e.g., a magnet), the first slave driven member 310 is a focusing coil, and the second slave driven member 420 is a blade driving coil. The magnetic steel drives the focusing coil to move along the optical axis direction when the focusing coil is powered on, so as to drive the lens supporting frame 300 to move along the optical axis direction for focusing. The magnetic steel drives the blade driving coil to rotate around the optical axis when the blade driving coil is powered on, so as to drive the blade driving frame 400 to rotate around the optical axis. Specifically, when the focusing coil and the blade driving coil are powered on, a Lorentz force is generated between the focusing coil, the blade driving coil, and the magnetic steel, and the focusing coil and the blade driving coil are driven to move by the Lorentz force. Therefore, when the movement for focusing and blade movement are required, the focusing coil and the blade driving coil can be powered on, thereby improving the controllability of the camera module 1000.

In embodiments of the disclosure, the focusing coil is circumferentially around the outer edge of the lens supporting frame 300. In this implement, the lens supporting frame 300 is substantially annular, and the focusing coil is wound around the outer wall of the lens supporting frame 300. When the focusing coil is energized (powered on), a Lorentz force is generated between the focusing coil and the magnetic steel, and since the magnetic steel is fixed on the base 200, the focusing coil drives the lens supporting frame 300 to move.

More specifically, there are a plurality of magnetic steels arranged on the base 200 and spaced apart from each other, and the plurality of magnetic steels are around the optical axis and disposed on a side of the base 300 facing the lens supporting frame 300.

Alternatively, in other feasible embodiments, there are multiple focusing coils, the multiple focusing coils are circumferentially arranged on the lens supporting frame 300, and the multiple focusing coils are spaced from one another. For example, the focusing coils are designated as four focusing coils, and the four focusing coils are arranged around the outer periphery of the lens supporting frame 300 and are equally spaced on the lens supporting frame 300. When the focusing coil is energized, the four focusing coils are all subjected to force, to drive the lens supporting frame 300 to move. It shall be understood that there may be other numbers of the focusing coils, such as two focusing coils, three or more focusing coils. Preferably, the multiple focusing coils are around the optical axis and equally spaced on the lens supporting frame 300, which can make the force applied on the lens supporting frame 300 more balanced and improve the stability and reliability of the camera module.

Furthermore, there are configured as multiple blade driving coils, and the multiple blade driving coils are circumferentially arranged on the blade driving frame 400 and spaced apart from one another. Similarly, there are four blade driving coils, and the four blade driving coils are spaced on the blade driving frame 400. When the blade driving coils are energized, a Lorentz force is generated between the blade driving coils and the magnetic steel, and the four blade driving coils are subjected to force to drive the blade driving frame 400 to rotate around the optical axis.

It is to be noted that the lens supporting frame 300 moves along the optical axis direction under the action of the Lorentz force, and the blade driving frame 400 rotates around the optical axis under the action of the Lorentz force. The reason is that Lorentz forces acting on the lens supporting frame 300 and the blade driving frame 400 have different directions, which is caused by that the focusing coils and the blade driving coils are arranged in different manners. Specifically, the direction of the Lorentz force can be determined according to the left-hand rule.

Furthermore, the lens supporting frame 300 is provided with a first flexible printed circuit 320, and the blade driving frame 400 is provided with a second flexible printed circuit 430. The first flexible printed circuit 320 and the second flexible printed circuit 430 are electrically connected with each other, so that when powered on, the first flexible printed circuit 320 and the second flexible printed circuit 430 can be energized concurrently to realize the synchronous adjustment of focusing and the aperture size.

Referring again to FIG. 3, in the present embodiment, it is also necessary to detect the focusing movement amount of the lens supporting frame 300 and the rotation amount of the blade driving frame 400 to precisely control the focusing and aperture adjustment of the camera module 1000. Specifically, a first position detection member 330 is provided on the lens supporting frame 300, and the first flexible printed circuit 320 is electrically connected with a first sensing element 321. During moving of the lens supporting frame 300, the first sensing element 321 detects a change of relative positions of the first position detection member 330 to determine the focusing movement amount of the lens supporting frame 300. For example, the first position detection member 330 can be a magnet, and the first sensing element 321 can be a Hall element. When the lens supporting frame 300 moves along the optical axis direction, the magnet follows the movement of the lens supporting frame 300, and the position of the Hall element is relatively fixed, resulting in a constantly changing magnetic field at the position of the Hall element, which may be mainly reflected in the constantly changing magnetic flux passing through the Hall element, thereby allowing detection of the movement amount of the lens supporting frame 300.

The second flexible printed circuit 430 is electrically connected with a second sensing element 431. During rotation of the blade driving frame 400, the second sensing element 431 determines a rotation angle of the blade driving frame 400 by detecting a relative position of the driving member 210. For example, when the driving member 210 is a magnetic member (e.g., magnetic steel), the second sensing element 431 may be a Hall element, and the driving member 210 drives the blade driving frame 400 to rotate to drive the second sensing element 431 to move, and the second sensing element 431 determines the rotation angle of the blade driving frame 400 by detecting changes in magnetic flux caused by the driving member 210 at different positions.

Furthermore, the lens supporting frame 300 is further provided with a first leaf spring 340 and a second leaf spring 350. The first leaf spring 340 is fixed on a surface of the object side of the lens supporting frame 300 and the second leaf spring 350 is fixed on a surface of the image side of the lens supporting frame 300. In addition, the first leaf spring 340 is fixed on a surface of the object side of the base 200 and the second leaf spring 350 is fixed on a surface of the image side of the base 200, thereby suspending and fixing the lens supporting frame 300 on the base 200.

In this embodiment, in order to avoid the blade driving ring 500 interfering with the camera lens 100 during focusing of the camera lens 100, the blade driving ring 500 needs to be movable along the optical axis direction. Specifically, the blade driving ring 500 is provided with a connecting arm 510, and the blade driving frame 400 defines a connecting slot 440, and the connecting arm 510 is slidably inserted into the connecting slot 440 along the optical axis direction so that the blade driving ring 500 and the blade driving frame 400 are clamped and connected with each other. Specifically, the connecting slot 440 penetrates through the blade driving frame 400 in the optical axis direction, but clamps the connecting arm 510 in the direction perpendicular to the optical axis direction. That is, the connecting slot 440 is a through slot extending in the optical axis direction. In this way, during rotation of the blade driving frame 400, the blade driving frame 400 can drive the blade driving ring 500 to rotate around the optical axis without affecting the movement of the blade driving ring 500 in the extending direction of the optical axis. Since the blade driving ring 500 is sleeved on the outer side of the camera lens 100, when the camera lens 100 is driven by the lens supporting frame 300 to move along the optical axis towards a direction away from the base 200, the outer edge of the lens barrel 120 pushes the blade driving ring 500 to move in a same direction, and in this case, the connecting arm 510 slides in the connecting slot 440.

Optionally, there are multiple connecting arms 510 and multiple connecting slots 440. The multiple connecting arms 510 and the multiple connecting slots 440 are clamped and connected correspondingly one by one. Preferably, there may be two connecting arms 510 provided, which are respectively provided on two opposing sides of the blade driving ring 500. There may be two connecting slots 440 provided, which are respectively provided on two opposing sides of the blade driving frame 400. In this way, the stability between the blade driving frame 400 and the blade driving ring 500 can be improved without increasing the manufacturing difficulty of the camera module 1000.

Referring to FIG. 7A to FIG. 7C, driven by the blade driving frame 400, the blade driving ring 500 rotates and drives the multiple light-shielding blades 600 to be gathered or be separated from each other, thereby adjusting the size of the aperture. FIG. 7A is a schematic view of a plurality of light-shielding blades 600 of the camera module 1000 being gathered to a limit position. FIG. 7B is a schematic view of a plurality of light-shielding blades 600 of the camera module 1000 being in a separation process. FIG. 7C is a schematic view of a plurality of light-shielding blades 600 of the camera module 1000 being separated from each other to a limit position.

It can be understood that the blade driving ring 500, the multiple light-shielding blades 600, and the blade supporting member 700 constitute an adjustable diaphragm. When the blade driving ring 500 is driven to rotate, the blade driving ring 500 drives the multiple light-shielding blades 600 to move, thereby changing the aperture of the adjustable diaphragm, and accordingly adjusting the amount of light that can pass through the adjustable diaphragm. When current is applied to the blade driving coil, the rotation of the blade driving frame 400 can drive the blade driving ring 500 to rotate, and the blade driving ring 500 drives the multiple light-shielding blades 600 to be gathered, resulting in the opening surrounded by the multiple light-shielding blades 600 becoming smaller and thus reducing the amount of light entering the camera module 1000. Alternatively, the blade driving ring 500 drives the multiple light-shielding blades 600 to be separated from one another, resulting in the opening surrounded by the multiple light-shielding blades 600 becoming larger and thus increasing the amount of light entering the camera module 1000. In some cases, the blade driving frame 400 may also rotate due to an undesirable action or vibration, resulting in a change in the amount of light entering the camera module 1000 that does not conform to expectations. To avoid a similar situation, the camera module 1000 of the present embodiment further includes a blade holding component 450, and the blade holding component 450 is fixed to the blade driving frame 400, and the blade holding component 450 is cooperated with the driving member 210 to cause the blade driving frame 400 to remain at an initial position in the power-off state. Therefore, in the case where the blade driving coil is not powered on, even if the blade driving frame 400 rotates due to an unexpected vibration, causing the multiple light-shielding blades 600 to move, the blade holding component 450 and the driving member 210 can cooperate with each other to cause the blade driving frame 400 to keep at the initial position, thereby stabilizing the positions of the multiple light-shielding blades 600 and maintaining the size and shape of the opening surrounded by the multiple light-shielding blades 600 relatively stable, thereby keeping the amount of light entering the camera module 1000 stable.

Specifically, the blade holding component 450 and the driving member 210 are both magnetic members, and the driving member 210 attracts the blade holding component 450 to maintain an angle of the blade driving frame 400 relative to the base 200. More specifically, the driving member 210 in this embodiment is a magnetic steel, and the blade holding component 450 is a yoke. The magnetic steel attracts the yoke by magnetic force, causing the position of the blade driving frame 400 to remain relatively stable relative to the base 200. In the power-off state, when an unexpected action or vibration causes the blade driving frame 400 to rotate, under the action of the attractive force between the magnetic steel and the yoke, the blade driving frame 400 automatically resets, causing the multiple light-shielding blades 600 to remain at a relatively stable position, thereby maintaining the size of the aperture.

It can be understood that in this embodiment, the base 200 and the blade driving frame 400 are relatively fixed in the extending direction of the optical axis by the attractive force between the driving member 210 and the blade holding component 450. Specifically, the driving member 210 attracts the blade holding component 450, and since the blade holding component 450 is fixed to the blade driving frame 400, the blade driving frame 400 is driven by the blade holding component 450 to be relatively fixed to the base 200. As can be seen from the above disclosure, a plurality of the spherical supporting members 230 are clamped between the base 200 and the blade driving frame 400. The spherical supporting members 230 can roll relatively to the base 200 and the blade driving frame 400. Since the movement track of the spherical supporting member 230 is constrained by the first accommodating groove 220 and the second accommodating groove 410, when the blade driving frame 400 is subjected to the Lorentz force between the driving member 210 and the second slave driven member 420, the blade driving frame 400 can rotate relatively to the base 200 in a plane perpendicular to the optical axis with the optical axis as the rotating axis.

Optionally, there may be multiple blade holding components 450, and the multiple blade holding components 450 are circumferentially around the blade driving frame 400 and spaced apart from each other. In this way, the attractive force between the magnetic steel and the yoke can be increased, and the stability of the positions of the plurality of light-shielding blades 600 can be improved. Preferably, the length of each of the blade holding components 450 is not less than 20% of the length of the driving member 210, so that the attractive force between each pair of the yoke and the magnetic steel can be increased, and the stability of the positions of the plurality of light-shielding blades 600 can be improved. In addition, the attractive force can also be changed by adjusting the length of the yoke, thereby changing the reset ability of the aperture. More preferably, when the blade holding component 450 and the driving member 210 are directly facing each other, a geometric center of the blade holding component 450 and a geometric center of the driving member 210 are connected by a line in parallel to the optical axis. The arrangement of the yoke and the magnetic steel in this position can more effectively utilize the magnetic force than other arrangements.

For the driving member 210 and the blade holding member 450, the use of the magnetic force between them to fix the position of the blade driving frame 400 has a similar effect to fixing the position of the blade driving frame 400 with an elastic member (such as a spring). Therefore, the interaction force between the driving member 210 and the blade holding member 450 can be adjusted by adjusting the size, shape, position, and the material of the driving member 210 and the blade holding member 450, which is similar to adjusting the elastic coefficient of the elastic member, thereby changing the ability of the blade driving frame 400 to reset during vibrating or shaking.

It shall be understood that, in this embodiment, in order to reduce the difficulty of manufacturing and testing the camera module 1000, the magnetic steels used as the driving members 210 may have exactly same specifications (such as size, shape, material, etc.). When there are multiple first slave driven members 310, the focusing coils used as the first slave driven members 310 may be coils having identical specifications. Similarly, the blade driving coils used as the second slave driven members 420 may have identical specifications. In addition, if the first slave driven member 310 includes the multiple first slave driven members 310, the first slave driven member 310 and the second slave driven member 420 may be coils of identical specification. The yokes used as the blade holding components 450 may also be identical in specifications. In some cases, when different magnetic steels are required for the driving member 210, the specifications, number, and positions of the different magnetic steels can be adjusted according to the force situation. Similarly, the first slave driven members 310, the second slave driven members 420, and the blade holding component 450 can also be adjusted according to actual needs, which will not be described in detail here.

Furthermore, in order to improve the positional stability of the driving members 210, grooves may be defined on the base 200, where the number of grooves and a contour of each groove respectively correspond to the number of the driving members 210 and a contour of a respective driving member 210. Each driving member 210 may be disposed in the respective groove, and the driving member 210 may be limited and fixed by an inner wall of the respective groove. In addition, the connection strength between the driving members 210 and the base 200 may be strengthened by adhesive bonding. As for the first slave driven member 310, when the first slave driven member 310 is a focusing coil surrounding the outer periphery of the lens supporting frame 300, the lens supporting frame 300 may define a groove extending in a circumferential direction on an outer edge of the lens supporting frame 300, and the first slave driven member 310 can be disposed in the groove circumferentially extended. When the first slave driven member 310 is a plurality of focusing coils arranged at intervals around the optical axis on the lens supporting frame 300, a plurality of grooves may be provided on the lens supporting frame 300, where the number of the plurality of grooves and a contour of each groove of the plurality of grooves respectively correspond to the number of the plurality of focusing coils and a contour of a respective focusing coil. Each first slave driven member 310 is disposed in the respective groove, and the first slave driven member 310 may be limited and fixed by an inner wall of the respective groove. For the second slave driven member 420, grooves can be arranged on the blade driving frame 400, where the number of the grooves and a contour of each groove of the grooves respectively correspond to the number of the second slave driven members 420 and a contour of a respective second slave driven member 420. Each second slave driven member 420 is disposed the respective groove, and the second slave driven member 420 can be limited and fixed by the inner wall of the respective groove. Similarly, the blade holding component 450 may be arranged in a same manner as the second slave driven member 420. In addition, in general, a size of the blade holding component 450 is smaller than that of the second slave driven member 420. Therefore, a groove for mounting the blade holding component 450 may be defined on the inner wall of the groove for mounting the second slave driven member 420. Thus, while meeting the mounting requirements of the second slave driven member 420 and the blade holding component 450, the blade holding component 450 may be limited by the second slave driven member 420 to prevent the blade holding component 450 from being separated from the blade driving frame 400.

In other feasible embodiments, the yoke may also be replaced by a magnetic fluid, and the principle using the magnetic fluid is the same as that using the magnetic yoke, which will not be described herein.

Referring to FIGS. 8 to 10 together, in the present embodiment, the blade driving ring 500 defines a plurality of through slots 520, and the plurality of through slots 520 are spaced apart from one another in a circumferential direction of the blade driving ring 500. Each through slot 520 extends from an outer edge of the blade driving ring 500 to an inner edge of the blade driving ring 500, and an extending direction of each through slot 520 forms an angle with a radial direction of the blade driving ring 500. Each of the plurality of light-shielding blades 600 is in a shape of an arc-shaped sheet, each respective light-shielding blade 600 of the plurality of light-shielding blades 600 is provided with a guide portion 610 at an end of the respective light-shielding blade 600. The guide portion 610 is located on a surface of an image side of the light-shielding blade 600. The guide portions 610 of the plurality of light-shielding blades 600 are arranged in one-to-one correspondence with and slidably inserted into the through slots 520. Thus, when the blade driving ring 500 rotates, each guide portion 610 slides along a respective through slot 520 under the constraint of an inner wall of the respective through slot 520, thereby changing the size and shape of the opening surrounded by the plurality of light-shielding blades 600, and thereby changing the amount of light incident on the camera module 1000.

Furthermore, the inner wall of each of the plurality of through slots 520 is provided with a limit portion 521 at a position adjacent to the optical axis, and the limit portion 521 is configured to limit a movement range of the guide portion 610. In fact, the limit portion 521 causes a size of a part of the through slot 520 near the optical axis to decrease, and when the guide portion 610 moves to the limit portion 521, the guide portion 610 is blocked by the limit portion 521. The guide portion 610 may not be detached from the through slot 520. Furthermore, the through slot 520 may also be provided with a limit portion 521 at a position away from the optical axis, so that the guide portion 610 can only slide in the through slot 520.

Alternatively, the guide portion 610 may be a protrusion protruding from a surface of the light-shielding blade 600. The specific shape and size of the protrusion can be set according to actual situations. Considering the influence of resistance, the guide portion 610 can preferably be a cylindrical structure. In other feasible embodiments, the guide portion 610 cane also be appropriately adjusted to other shapes.

Referring to FIG. 11, in the present embodiment, the blade supporting member 700 defines a plurality of positioning holes 710 spaced apart from each other and in a circumferential direction of the blade supporting member, and the respective light-shielding blade 600 is provided with a positioning portion 620 on the other end of the respective light-shielding blade 600. The positioning portion 620 is located on a surface of the object side of the respective light-shielding blade 600. The positioning portions 620 of the plurality of light-shielding blades 600 are in one-to-one correspondence with the plurality of positioning holes 710 and rotatably inserted into the positioning holes 710. That is to say, each of the light-shielding blades 600 is provided with a respective positioning portion 620 on the surface of the object side, and the respective positioning portion 620 is rotatably inserted into the respective positioning hole 710. When the blade driving ring 500 rotates, the inner wall of the through slot 520 exerts force on the guide portion 610, thereby driving the plurality of light-shielding blades 600 to move. Since the other end of the respective light-shielding blade 600 is constrained by the blade supporting member 700 via the respective positioning portion 620, the plurality of light-shielding blades 600 can still rotate, and therefore, the plurality of light-shielding blades 600 rotate to gather or separate around their respective axes corresponding to the positioning holes 710, thereby achieving the change in the size of the aperture.

In the present embodiment, the blade driving ring 500 is substantially annular, and the plurality of light-shielding blades 600 are all arc-shaped sheet. A length of each light-shielding blade 600 is 30% to 60% of a circumference of the blade driving ring 500. In this way, the light-shielding blade 600 can have a sufficient length while maintaining a relatively light weight, avoiding mutual interference in the movement processes of different light-shielding blades 600. In this embodiment, the plurality of light-shielding blades 600 are sequentially stacked and surrounded in an annular shape. Specifically, the guide portion 610 of a first light-shielding blade 600 is inserted into a through slot 520, and the positioning portion 620 on the other end of the first light-shielding blade 600 is inserted into a positioning hole 710. The surface of the image side of the end of a second light-shielding blade 600 provided with the guide portion 610 is in close contact with the surface of the object side of the end of the first light-shielding blade 600 provided with the positioning portion 620. The guide portion 610 of the second light-shielding blade 600 is inserted into another through slot 520, and the positioning portion 620 of the second light-shielding blade 600 is inserted into another positioning hole 710. In similar manners, all the light-shielding blades 600 are arranged in an annular shape.

Furthermore, an area of an orthographic projection of the light-shielding blade 600 on a plane perpendicular to the optical axis is designated as a first area. An area of an orthographic projection of a sector, with an edge of the light-shielding blade 600 away from the optical axis as an arc, on the plane perpendicular to the optical axis is designated as a second area. The first area is 40% to 70% of the second area. In this way, the plurality of light-shielding blades 600 can be kept to have a relatively light weight, and interference between different light-shielding blades 600 can be avoided.

Alternatively, the number of the light-shielding blades 600 can be adjusted according to actual needs. Generally, the more the number of light-shielding blades 600, the closer the opening surrounded by the light-shielding blades 600 is to a circular shape. Considering the weight and manufacturing cost of the camera module, the number of the light-shielding blades 600 can be set to be five to seven.

Referring again to FIGS. 4 and 5, in the present embodiment, the blade supporting member 700 is in a shape of a groove having a first central through hole 720. The opening of the groove of the blade supporting member 700 faces the lens supporting frame 300. A driving ring pressure plate 730 is fixed on an edge of the blade supporting member 700 surrounding the opening of the groove. The driving ring pressure plate 730 and the blade supporting member 700 define a blade chamber 740. The blade driving ring 500 and the plurality of light-shielding blades 600 are located in the blade chamber 740. The driving ring pressure plate