Aperture driving assembly, lens driving device and camera module

Abstract

The invention relates to an aperture driving assembly, a lens driving device and a camera module, the aperture driving assembly comprises an aperture support with a through hole, an aperture driving frame, a plurality of aperture blades, a plurality of blade driving pieces, a plurality of lens driving pieces and a plurality of lens driving pieces, one aperture blade is fixed on each blade driving piece; the rotary driving mechanism is used for driving the aperture driving frame to rotate relative to the aperture bracket; at least one part of each blade driving part is connected to the aperture support in a sliding mode, the other part of each blade driving part is connected to the aperture driving frame, and the aperture driving frame rotates relative to the aperture support and enables the multiple blade driving parts to slide relative to the aperture support, and meanwhile the multiple aperture blades are driven to move and change the aperture of the light inlet hole. The aperture structure has the advantages that the integrated blade transmission part is used, secondary machining of the blades is not needed, meanwhile, the structure number of the device is optimized, and the thickness of the whole aperture structure in the optical axis direction is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of electronic imaging, and particularly relates to a diaphragm driving assembly, a lens driving device, and an imaging module. Background Art

[0002] For a micro camera applied to a mobile phone, a variable aperture is generally configured on the lens and is arranged at the front end of the lens. Therefore, it will increase the total height and total weight of the lens, which has an adverse impact on the focusing drive mechanism.

[0003] Patent CN218567794U discloses a variable aperture imaging drive device, including blades, a carrier assembly, a guide member, and a drive assembly; the carrier assembly includes a fixed carrier, a rotating carrier, and a supporting carrier; both ends of the blade are respectively connected to the fixed carrier and the rotating carrier; the fixed carrier is connected to the supporting carrier, the rotating carrier is arranged between the fixed carrier and the supporting carrier, and a guide member is arranged between the rotating carrier and the supporting carrier; the drive assembly includes a fixed member, a rotating member, a shape memory alloy wire, and a supporting member, one end of the fixed member and one end of the rotating member are connected by the shape memory alloy wire, the other end of the fixed member is fixed on the supporting carrier; one end of the rotating member is also connected to the supporting carrier through the supporting member, and the other end of the rotating member is connected to the rotating carrier to drive the rotating carrier to rotate relative to the supporting carrier.

[0004] In the above patent, for each blade of the existing diaphragm drive, a design of opening a guide hole and / or adding a guide post is required. For the secondary processing scheme of the very thin diaphragm blades, the processing difficulty is high and the production cost remains high.

[0005] Secondly, the specific structure of the existing diaphragm blade drive is relatively complex, resulting in a relatively thick thickness of the entire diaphragm in the optical axis direction. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems, and provide a diaphragm driving assembly, a lens driving device, and an imaging module that can solve the above technical problems.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A diaphragm driving assembly, including a diaphragm bracket having a through hole, a diaphragm driving frame rotating relative to the diaphragm bracket, and a plurality of diaphragm blades, the plurality of diaphragm blades enclose a light inlet hole, and the diaphragm driving assembly further includes:

[0009] A plurality of blade driving members, each of the blade driving members is fixedly provided with one of the diaphragm blades;

[0010] A rotation drive mechanism drives the aperture drive bracket to rotate relative to the aperture bracket;

[0011] At least a part of the vane drive member is slidably connected to the aperture bracket, and at least another part is connected to the aperture drive bracket. The aperture drive bracket rotates relative to the aperture bracket, causing multiple vane drive members to slide relative to the aperture bracket, and simultaneously driving multiple aperture vanes to move and change the aperture of the light inlet hole.

[0012] Furthermore, the aperture drive assembly further includes an arc motion guiding mechanism. The arc motion guiding mechanism enables the vane drive member to perform an arc trajectory motion radially relative to the aperture bracket in a plane perpendicular to the axis line of the through hole, and at least a part of the arc motion guiding mechanism is rotatably connected to the aperture drive bracket.

[0013] Furthermore, the aperture vane, the vane drive member, the aperture drive bracket, and the rotation drive mechanism are sequentially distributed along the axial direction of the through hole.

[0014] Furthermore, the arc motion guiding mechanism includes a first trajectory hole whose trajectory path is distributed along the circumferential direction of the aperture bracket. A first guide post is provided on the vane drive member, passing through the first trajectory hole and rotatably connected to the aperture drive bracket; and the arc motion guiding mechanism further includes a second trajectory groove / hole whose trajectory path is set at an angle with respect to the radial direction of the aperture bracket. A second guide post is provided on the vane drive member and inserted into the second trajectory groove / hole.

[0015] Furthermore, the first guide post and the second guide post are parallel to each other and face the same direction, and the vane drive member, the first guide post, and the second guide post are integrally connected.

[0016] Furthermore, the rotation drive mechanism is a shape memory alloy wire drive mechanism. The rotation drive mechanism includes a crankshaft whose one end is rotatably connected to the aperture bracket; in the radial direction of the aperture drive bracket, the other end of the crankshaft is slidably connected to the aperture drive bracket and drives the aperture drive bracket to rotate relative to the aperture bracket; the aperture bracket and the crankshaft are connected by a shape memory alloy wire, and the crankshaft is swung by the expansion and contraction of the shape memory alloy wire.

[0017] Furthermore, the crankshaft is in an arc-shaped structure. One end of the crankshaft rotatably connected to the aperture bracket and the other end of the crankshaft slidably connected to the aperture drive bracket are on the same first straight line, and one ends of the two shape memory alloy wires respectively connected to the aperture bracket are on the same second straight line, and the first straight line and the second straight line are perpendicularly distributed.

[0018] Further, a sliding column is provided at the other end of the crankshaft, a sliding groove is provided on the aperture driving frame, at least a part of the sliding column is inserted into the sliding groove, and the sliding groove and the sliding column are slidably connected.

[0019] Further, the aperture bracket further has a blade accommodating chamber and a driving mechanism accommodating chamber, the aperture blades and the blade driving member are in the blade accommodating chamber, and the rotation driving mechanism is in the driving mechanism accommodating chamber.

[0020] Further, at least one fixing block is provided on the aperture bracket, at least one positioning groove corresponding to the fixing block one by one is provided on the outer periphery of the aperture driving frame, at least a part of the fixing block is in the positioning groove, and when any one of the two opposite groove walls of the positioning groove contacts the fixing block, the aperture driving frame stops rotating.

[0021] An aperture driving assembly, including an aperture bracket having a through hole, an aperture driving frame rotatable relative to the aperture bracket, and a plurality of aperture blades, the plurality of aperture blades enclose a light inlet hole, and the aperture driving assembly further includes:

[0022] A rotation driving mechanism for driving the aperture driving frame to rotate relative to the aperture bracket;

[0023] The aperture driving frame rotates relative to the aperture bracket and drives a plurality of aperture blades to move and change the aperture of the light inlet hole;

[0024] The rotation driving mechanism includes a driving member and a crankshaft rotatably connected to the aperture bracket at one end; in the radial direction of the aperture driving frame, the other end of the crankshaft is slidably connected to the aperture driving frame, and the driving member drives at least a part of the crankshaft to swing and drives the aperture driving frame to rotate relative to the aperture bracket.

[0025] The present application further provides a lens driving device, and the lens driving device includes the aperture driving assembly described above.

[0026] The present application further provides an imaging module, and the imaging module includes the lens driving device described above.

[0027] Compared with the prior art, the advantages of the present application are as follows: the present application uses an integrated blade transmission member, which eliminates the need for secondary processing of the blades, and at the same time optimizes the structure quantity of the device, reducing the thickness of the entire aperture structure in the optical axis direction. Description of the Drawings

[0028] Figure 1 It is an assembly drawing of the structure of the aperture driving assembly of the present invention;

[0029] Figure 2Structural diagram of the final product of the aperture driving component of the present invention;

[0030] Figure 3 is Figure 1 Default state diagram of the vane aperture of the main structure of the aperture driving component of the present invention;

[0031] Figure 4 Closed state diagram of the vane aperture of the main structure of the aperture driving component of the present invention;

[0032] Figure 5 Maximum open state diagram of the vane aperture of the main structure of the aperture driving component of the present invention;

[0033] Figure 6 Exploded view of the main structure of the aperture driving component of the present invention;

[0034] Figure 7 Cooperating state diagram of the rotary driving mechanism and the aperture driving frame in the aperture driving component of the present invention;

[0035] Figure 8 Detail view of the top structure of the aperture support in the aperture driving component of the present invention;

[0036] Figure 9 is Figure 8 Top view of the aperture support structure;

[0037] Figure 10 Main structure diagram of the vane driving part in the aperture driving component of the present invention;

[0038] Figure 11 is Figure 9 Cross-sectional view at the cross-section line A;

[0039] Figure 12 Side perspective view of the aperture support in the aperture driving component of the present invention;

[0040] Figure 13 Schematic diagram of an example of the camera module in the fourth embodiment of the present invention.

[0041] In the figure, aperture support 1, through hole 10, first track hole 11, second track groove / hole 12, vane accommodation chamber 13, driving mechanism accommodation chamber 14, fixing block 15, outer annular cylinder 16, inner annular cylinder 17, aperture driving frame 2, sliding groove 201, stop groove 25, aperture vane 3, vane driving part 30, first guide post 31, second guide post 32, rotary driving mechanism 4, crankshaft 40, sliding column 401, shape memory alloy wire 41, annular cover plate 5, second straight line x, first straight line y. Detailed implementation method

[0042] The following are specific embodiments of the present invention. In conjunction with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0043] Embodiment 1

[0044] As Figures 1 - 6 shown, the aperture driving assembly includes an aperture bracket 1 having a through hole 10, an aperture driving frame 2 that rotates relative to the aperture bracket 1, and a plurality of aperture blades 3. The plurality of aperture blades 3 enclose a light incident hole. The aperture driving assembly further includes:

[0045] a plurality of blade driving members 30, with one of the aperture blades 3 fixed to each of the blade driving members 30;

[0046] a rotation driving mechanism 4 that drives the aperture driving frame 2 to rotate relative to the aperture bracket 1;

[0047] At least a part of the blade driving member 30 is slidably connected to the aperture bracket 1, and at least another part is connected to the aperture driving frame 2. The aperture driving frame 2 rotates relative to the aperture bracket 1, causing the plurality of blade driving members 30 to slide relative to the aperture bracket 1, and simultaneously driving the plurality of aperture blades 3 to move and change the aperture of the light incident hole.

[0048] The aperture driving assembly further includes an arc motion guiding mechanism. The arc motion guiding mechanism enables the blade driving member 30 to perform an arc trajectory motion radially relative to the aperture bracket 1 in a plane perpendicular to the axis line of the through hole 10, and at least a part of the arc motion guiding mechanism is rotationally connected to the aperture driving frame 2.

[0049] The blade driving member 30 has a mating plane that fits with at least a part of the surface of the aperture blade 3. At least a part of the surface of the aperture blade 3 is fixed to the mating plane, and the two are connected by gluing or welding.

[0050] The blade driving members 30 are annularly distributed on the aperture bracket 1. When the blade driving members 30 perform an arc trajectory motion, they can drive the light incident hole formed by the aperture blades 3 fixed thereto to expand and contract, thereby achieving the effect of changing the aperture size.

[0051] The aperture blade 3, the blade driving member 30, the aperture driving frame 2, and the rotation driving mechanism 4 are sequentially distributed along the axial direction of the through hole 10.

[0052] Specifically, the rotation driving mechanism 4 is connected to the aperture driving frame 2. The rotation driving mechanism 4 drives the aperture driving frame 2 to rotate around the axis line of the through hole 10. The aperture driving frame 2 is rotationally connected to the blade driving member 30. Then, the aperture driving frame 2 drives the blade driving member 30 to rotate around the axis line of the through hole 10. The blade driving member 30 drives the light incident hole formed by the aperture blades 3 fixed thereto to expand and contract, thereby achieving the effect of changing the aperture size.

[0053] As shown in Figures 8 - 11 FIG. 4, the arc motion guiding mechanism includes a first track hole 11 whose track path is distributed along the circumferential direction of the aperture bracket 1, and a first guide post 31 is provided on the blade driving member 30, passing through the first track hole 11 and rotatably connected to the aperture driving frame 2; and the arc motion guiding mechanism further includes a second track groove / hole 12 whose track path is arranged along the radial angle of the aperture bracket 1, and a second guide post 32 inserted into the second track groove / hole 12 is provided on the blade driving member 30.

[0054] The first guide post 31 moves in the first track hole 11, and the second guide post 32 moves in the second track groove / hole 12. The first guide post 31 is rotatably connected to the aperture driving frame 2. The aperture driving frame 2 drives the first guide post 31 to move in the first track hole 11 and rotate around the axis line of the through hole 10 at the same time. Since the second guide post 32 is fixed to the same blade driving member 30 as the first guide post 31, when the first guide post 31 moves, it will drive the second guide post 32 to move in the second track groove / hole 12, so that the blade driving member 30 makes an arc track motion.

[0055] The first guide post 31 and the second guide post 32 are parallel to each other and have the same orientation. The blade driving member 30, the first guide post 31, and the second guide post 32 are integrally connected. The blade driving member 30, the first guide post 31, and the second guide post 32 can be produced by manufacturing methods such as die casting or injection molding.

[0056] Both the first guide post 31 and the second guide post 32 point to the aperture driving frame 2, and the aperture bracket 1 is placed between the blade driving member 30 and the aperture driving frame 2.

[0057] The track paths of the first track hole 11 and the second track groove / hole 12 are distributed at a right angle or an obtuse angle.

[0058] The specific description that the track paths of the first track hole 11 and the second track groove / hole 12 are distributed at a right angle or an obtuse angle is as follows: when the aperture blade 3 changes from a large aperture to a small aperture, the moving direction paths of the first guide post 31 and the second guide post 32 in the first track hole 11 and the second track groove / hole 12 are distributed at a right angle or an obtuse angle; when the aperture blade 3 changes from a small aperture to a large aperture, the moving direction paths of the first guide post 31 and the second guide post 32 in the first track hole 11 and the second track groove / hole 12 are distributed at a right angle or an obtuse angle. An obtuse angle is preferred.

[0059] In some other embodiments, if the aperture driving frame 2, the blade driving member 3, and the aperture blade 3 are all on the same side of the aperture bracket 1, the first track hole 11 can be cancelled, and at least part of the connection between the aperture driving frame 2 and the blade driving member 3 can be directly made.

[0060] In other embodiments, at least a part of the blade driving member 30 is rotatably connected to the aperture bracket 1, and at least another part is slidably connected to the aperture driving frame 2. Specifically, the first track hole 11 is a circular hole that cooperates with the first guide post 31 for rotation, and the second track groove / hole 12 is provided on the aperture driving frame 2 and is slidably connected to the second guide post 32. The above manner is considered equivalent to this embodiment.

[0061] As Figure 7 shown, the rotation driving mechanism 4 is a shape memory alloy wire driving mechanism. Of course, it can also be a worm and gear motor driving mechanism or a magnet coil driving mechanism. The rotation driving mechanism 4 includes a crankshaft 40 rotatably connected to one end of the aperture bracket 1; radially of the aperture driving frame 2, the other end of the crankshaft 40 is slidably connected to the aperture driving frame 2. The rotation driving mechanism 4 drives the crankshaft 40 to swing around the end that rotates with the aperture bracket 1 and drives the aperture driving frame 2 to rotate relative to the aperture bracket 1. In other embodiments, one end of the crankshaft 40 can be slidably connected to the aperture bracket 1, and the other end of the crankshaft 30 is rotatably connected to the aperture driving frame 2.

[0062] In this embodiment, the rotation driving mechanism 4 is a shape memory alloy wire driving mechanism. One end of the aperture bracket 1 and the crankshaft 40 are connected by two shape memory alloy wires 41 symmetrically distributed with respect to the axis of the through hole 10.

[0063] The ends of the shape memory alloy wires 41 connected to one end of the crankshaft 40 are respectively fixed at the rotation connection between the crankshaft 40 and the aperture bracket 1. The shape memory alloy wires 41 are connected to an external control circuit. When it is necessary to control the aperture size, the shape memory alloy wires 41 are affected by the current and expand or contract, thereby forming a torque with the rotation connection and driving the crankshaft 40 to rotate around the rotation connection. Then, the end of the crankshaft 40 far from the rotation connection with the aperture bracket 1 drives the aperture driving frame 2 to rotate.

[0064] The first track hole 11 and the second track groove / hole 12 are provided on the annular plate body, so that the blade accommodation chamber 13 and the driving mechanism accommodation chamber 14 communicate.

[0065] The aperture driving frame 2 is a ring structure, for example, a circular ring. An annular surface in the thickness direction of the aperture driving frame 2 is conformable to an annular surface in the thickness direction of the annular plate body. The blade driving member 30 has a fitting plane that coincides with at least a part of the other annular surface in the thickness direction of the annular plate body. At this time, the aperture driving frame 2 and the blade driving member 30 are parallel to each other. The blade driving member 30 enables the aperture blades 3 not to directly contact the aperture driving frame 2. At the same time, it changes the phenomenon of large wear caused by the large-area direct contact and relative movement of the aperture blades 3 in the past.

[0066] The first track hole 11 is an arc-shaped waist hole. The second track groove / hole 12 is selected as the second track hole, and of course, the second track groove can also be selected. The second track groove / hole 12 is any one of a rectangular hole and a rectangular groove.

[0067] The crankshaft 40 has an arc-shaped structure. One end of the crankshaft 40 that is rotatably connected to the aperture bracket 1 and the other end of the crankshaft 40 that is slidably connected to the aperture driving frame 2 are on the first straight line y. One ends of the two shape memory alloy wires 41 that are respectively connected to the aperture bracket 1 are on the second straight line x. The first straight line y and the second straight line x are perpendicularly distributed.

[0068] The intersection point of the first straight line y and the second straight line x is on the axis of the through hole 10. The advantage of this design is that the force between components is uniform, and at the same time, the distribution method of the shape memory alloy wires 41 can just drive the crankshaft 40 to perform rotational motion.

[0069] A sliding column 401 is provided at the other end of the crankshaft 40. A sliding groove 201 is provided on the aperture driving frame 2. At least part of the sliding column 401 is inserted into the sliding groove 201, and the sliding groove 201 is slidably connected to the sliding column 401. In other embodiments, a sliding groove 201 can be provided at the other end of the crankshaft 40, and a sliding column 401 that cooperates with the sliding groove 201 can be provided on the aperture driving frame 2.

[0070] Since the axis of rotation of the crankshaft 40 around the axis does not coincide with the central axis of the through hole 10, the sliding column 401 will move radially. The provision of the sliding groove 201 can ensure the stable connection between the crankshaft 40 and the aperture driving frame 2.

[0071] As Figure 12 shown, the aperture bracket 1 further has a blade accommodation chamber 13 and a driving mechanism accommodation chamber 14. Part of the aperture blade 3 and the blade driving member 30 are in the blade accommodation chamber 13, and the rotary driving mechanism 4 is in the driving mechanism accommodation chamber 14. The first guide post 31 passes through the aperture bracket 1 and is connected to the rotary driving mechanism 4 in the driving mechanism accommodation chamber 14.

[0072] The aperture bracket 1 includes an outer annular cylinder 16. An annular plate body perpendicular to the outer annular cylinder 16 is connected to the inner wall of the outer annular cylinder 16. An inner annular cylinder 17 with a through hole 10 is connected to the inner side of the annular plate body. The axis of the outer annular cylinder 16 coincides with the axis of the inner annular cylinder 17. The axial length of the inner annular cylinder 17 is shorter than the length of the outer annular cylinder 16. One axial end of the inner annular cylinder 17 is flush with one axial end of the outer annular cylinder 16, and the other axial end of the inner annular cylinder 17 is connected to the inner wall of the annular plate body. At this time, a part of the inner wall of the outer annular cylinder 16, one surface in the thickness direction of the annular plate body, and the outer wall of the inner annular cylinder 17 form the driving mechanism accommodation chamber 14, and the remaining inner wall of the outer annular cylinder 16 and the other surface in the thickness direction of the annular plate body form the blade accommodation chamber 13;

[0073] At both axial ends of the outer annular cylinder 16, annular cover plates 5 are respectively provided, and the annular cover plates 5 form protection for the components in the accommodation chamber.

[0074] In the actual assembly process, the rotary drive mechanism 4 can be assembled first, then the aperture bracket 1, and then the blade drive member 30 and the aperture blades 3.

[0075] At least one fixing block 15 is provided on the aperture bracket 1, and at least one positioning groove 25 corresponding to the fixing block 15 one by one is provided on the outer periphery of the aperture drive frame 2. At least a part of the fixing block 15 is located in the positioning groove 25, and when any one of the two opposite groove walls of the positioning groove 25 contacts the fixing block 15, the aperture drive frame 2 stops rotating.

[0076] The cooperation of the fixing block 15 and the positioning groove 25 is to ensure that when adjusting the aperture size, the rotation angle of the aperture drive frame 2 will not be too large, so as to prevent damage to the components.

[0077] In this embodiment, two fixing blocks 15 are provided on the aperture bracket 1, and two positioning grooves 25 corresponding to the fixing blocks 15 one by one are provided on the outer periphery of the aperture drive frame 2. At least a part of the fixing block 15 is located in the positioning groove 25, and when any one of the two opposite groove walls of the positioning groove 25 contacts the fixing block 15, the aperture drive frame 2 stops rotating.

[0078] Two shape memory alloy wires 41 are distributed in an "eight" shape, and one end of the shape memory alloy wire 41 is fixed to the fixing block 15.

[0079] Embodiment Two

[0080] The structure and principle of this embodiment are basically the same as those of Embodiment One. The different structure lies in that for the motion guiding mechanism of the above-mentioned Embodiment One, this embodiment provides a new motion guiding mechanism.

[0081] The motion guiding mechanism includes a first track hole 11 whose track path is distributed along the circumferential direction of the aperture bracket 1. A first guide post 31 that penetrates the first track hole 11 and is rotationally connected to the aperture drive frame 2 is provided on the blade drive member 30; and the motion guiding mechanism further includes a second guide post 32 provided on the aperture bracket 1, and a second track groove / hole 12 for the second guide post 32 to be inserted is provided on the blade drive member 30.

[0082] The blade drive member 30 has a fitting plane that fits with at least a part of the surface of the aperture blade 3, and at least a part of the surface of the aperture blade 3 is fixed to the fitting plane, and the two are connected by gluing or welding.

[0083] The implementation method in this embodiment can achieve the same effect as the method in Embodiment One.

[0084] Embodiment Three

[0085] The structure and principle of this embodiment are basically the same as those of the first embodiment, including an aperture bracket 1 having a through hole 10; an aperture driving frame 2 that rotates relative to the aperture bracket 1; and a plurality of aperture blades 3 that enclose a light inlet hole communicating with the through hole 10; a rotation driving mechanism 4 that drives the aperture driving frame 2 to rotate relative to the aperture bracket 1.

[0086] The aperture driving frame 2 rotates relative to the aperture bracket 1 and drives a plurality of aperture blades 3 to move and change the aperture of the light inlet hole.

[0087] The rotation driving mechanism 4 includes a driving member and a crankshaft 40 whose one end is rotatably connected to the aperture bracket 1; in the radial direction of the aperture driving frame 2, the other end of the crankshaft 40 is slidably connected to the aperture driving frame 2, and the driving member drives at least a part of the crankshaft 40 to swing and drives the aperture driving frame 2 to rotate relative to the aperture bracket 1. In other embodiments, one end of the crankshaft 40 is slidably connected to the aperture bracket 1, and the other end is rotatably connected to the aperture driving frame 2.

[0088] The driving member can be a shape memory alloy wire driving mechanism, and of course it can also be a worm and gear motor driving mechanism, or a magnet coil driving mechanism.

[0089] The difference from the first embodiment is that the blade driving member 30 is cancelled, a first guide post 31 is provided on one of the aperture blade 3 and the aperture driving frame 2, and a hole for rotatably connecting to the first guide post 31 is provided on the other; a second guide post 32 is provided on one of the aperture blade 3 and the aperture driving frame 2, and a second track groove / hole 12 slidably connected to the second guide post 32 is provided on the other. Of course, the blade driving member 30 can still be retained.

[0090] When the driving member is a magnet coil driving mechanism, a magnet is provided on one of the crankshaft 40 and the aperture bracket 1, and a coil opposite to at least a part of the magnet is provided on the other, and a Lorentz force is generated by energizing the coil and cooperating with the magnet to drive the crankshaft 40 to swing.

[0091] Embodiment Four

[0092] The structure and principle of this embodiment are basically the same as those of the first embodiment. The different structure is that for the aperture driving assembly of the above-mentioned first embodiment, the lens driving device of this embodiment includes an aperture driving assembly.

[0093] The aperture driving assembly is fixed at the front end of the lens in the lens driving device. At the same time, the aperture driving assembly is connected to an external control circuit. External light passes through the aperture driving assembly and enters the lens in the lens driving device, and is refracted, and finally reaches the imaging area of the device.

[0094] Embodiment Five

[0095] The structure and principle of this embodiment are basically the same as those of the third embodiment. The different structure lies in that for the lens driving device of the fourth embodiment above, the camera module of this embodiment includes a lens driving device.

[0096] As Figure 13 shown, the camera module is used in electronic devices, including 3C products such as computers, mobile smart phones and digital cameras. In this embodiment, the module is used as the camera imaging component of a mobile smart phone.

[0097] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Aperture driving assembly, comprising an aperture bracket (1) having a through hole (10), an aperture driving frame (2) rotatable relative to the aperture bracket (1), and a plurality of aperture blades (3), wherein the plurality of aperture blades (3) define a light inlet hole, and is characterized in that, The aperture driving assembly further includes: A plurality of blade driving members (30), with one aperture blade (3) fixed to each of the blade driving members (30); A rotation driving mechanism (4) for driving the aperture driving frame (2) to rotate relative to the aperture support (1); At least a part of the blade driving member (30) is slidably connected to the aperture support (1), and at least another part is connected to the aperture driving frame (2). The aperture driving frame (2) rotates relative to the aperture support (1) to cause the plurality of blade driving members (30) to slide relative to the aperture support (1), and simultaneously drives the plurality of aperture blades (3) to move and change the aperture of the light inlet hole.

2. The aperture driving assembly according to claim 1, wherein The aperture driving assembly further includes an arc motion guiding mechanism. The arc motion guiding mechanism enables the blade driving member (30) to perform an arc-shaped trajectory motion radially relative to the aperture support (1) in a plane perpendicular to the axis of the through hole (10), and at least a part of the arc motion guiding mechanism is rotatably connected to the aperture driving frame (2).

3. The aperture driving assembly according to claim 1, wherein The aperture blade (3), the blade driving member (30), the aperture driving frame (2), and the rotation driving mechanism (4) are sequentially distributed along the axial direction of the through hole (10).

4. The aperture driving assembly according to claim 1, wherein The arc motion guiding mechanism includes a first trajectory hole (11) whose trajectory path is distributed along the circumferential direction of the aperture support (1). A first guide post (31) is provided on the blade driving member (30) and penetrates through the first trajectory hole (11) and is rotatably connected to the aperture driving frame (2). The arc motion guiding mechanism further includes a second trajectory groove / hole (12) whose trajectory path is set at a radial angle with respect to the aperture support (1). A second guide post (32) inserted into the second trajectory groove / hole (12) is provided on the blade driving member (30).

5. The aperture driving assembly according to claim 4, wherein The first guide post (31) and the second guide post (32) are parallel to each other and face the same direction, and the blade driving member (30), the first guide post (31), and the second guide post (32) are integrally formed.

6. The aperture driving assembly according to claim 1, wherein The rotation driving mechanism (4) is a shape memory alloy wire driving mechanism. The rotation driving mechanism (4) includes a crankshaft (40) whose one end is rotatably connected to the aperture support (1). Radially of the aperture driving frame (2), the other end of the crankshaft (40) is slidably connected to the aperture driving frame (2) and drives the aperture driving frame (2) to rotate relative to the aperture support (1). The aperture support (1) and the crankshaft (40) are connected by a shape memory alloy wire (41), and the crankshaft (40) is swung by the expansion and contraction of the shape memory alloy wire (41).

7. The aperture driving assembly according to claim 6, wherein The crankshaft (40) is of an arc-shaped structure. One end of the crankshaft (40) rotatably connected to the aperture support (1) and the other end of the crankshaft (40) slidably connected to the aperture driving frame (2) are on a first straight line (y). One ends of the two shape memory alloy wires (41) respectively connected to the aperture support (1) are on a second straight line (x), and the first straight line (y) and the second straight line (x) are perpendicularly distributed.

8. The aperture driving assembly according to claim 6, characterized in that, A sliding column (401) is provided at the other end of the crankshaft (40). A chute (201) is provided on the aperture driving frame (2). At least a part of the sliding column (401) is inserted into the chute (201), and the chute (201) is slidably connected to the sliding column (401).

9. The aperture driving assembly according to any one of claims 3-8, characterized in that, The aperture bracket (1) further has a blade accommodation chamber (13) and a driving mechanism accommodation chamber (14). The aperture blades (3) and the blade driving member (30) are located in the blade accommodation chamber (13), and the rotary driving mechanism (4) is located in the driving mechanism accommodation chamber (14).

10. The aperture driving assembly according to claim 1, wherein At least one fixing block (15) is provided on the aperture bracket (1). At least one position-limiting groove (25) corresponding to the fixing block (15) one by one is provided on the outer periphery of the aperture driving frame (2). At least a part of the fixing block (15) is located in the position-limiting groove (25), and when any one of the two opposite groove walls of the position-limiting groove (25) contacts the fixing block (15), the aperture driving frame (2) stops rotating.

11. Aperture driving assembly, comprising an aperture bracket (1) having a through hole (10), an aperture driving frame (2) rotatable relative to the aperture bracket (1), and a plurality of aperture blades (3). The plurality of aperture blades (3) define a light incident hole, and is characterized in that, The aperture driving assembly further includes: A rotary driving mechanism (4) for driving the aperture driving frame (2) to rotate relative to the aperture bracket (1); The aperture driving frame (2) rotates relative to the aperture bracket (1) and drives a plurality of aperture blades (3) to move and change the aperture of the light inlet hole; The rotary driving mechanism (4) includes a driving member and a crankshaft (40) rotatably connected to the aperture bracket (1) at one end. Radially of the aperture driving frame (2), the other end of the crankshaft (40) is slidably connected to the aperture driving frame (2), and the driving member drives at least a part of the crankshaft (40) to swing and drives the aperture driving frame (2) to rotate relative to the aperture bracket (1).

12. A lens driving device, characterized in that, The lens driving device includes the aperture driving assembly according to any one of claims 1-11.

13. The camera module is characterized in that, The imaging module includes the lens driving device according to claim 12.

Images