Aperture blade, aperture drive assembly, and lens drive device

Abstract

The utility model relates to an aperture vane, aperture drive assembly and lens drive device, including vane body and at least one with vane body vertical connection's movement guide post, aperture vane still include and vane body thickness direction any one surface's at least partial surface contact's vane movement stabilizing block, movement guide post is fixed on vane movement stabilizing block, vane movement stabilizing block with vane body pass through concave and convex connecting structure and connect. The application advantage: utilize the cooperation of vane movement stabilizing block and vane body, can keep vane body smooth sliding on the plane perpendicular to the optical axis, and simultaneously because vane movement stabilizing block lifts vane body away from aperture support, vane body does not contact with aperture support, guarantees that vane body does not occur bending deformation in the movement process, and then improves the service life of equipment.

Description

Technical Field

[0001] This application belongs to the field of electronic device imaging, and particularly relates to an aperture blade, an aperture driving assembly, and a lens driving device. Background Technology

[0002] Aperture blades can control the amount and direction of light passing through the lens as needed, and adjust the intensity and angle of light, thereby controlling the exposure and depth of field. The size of the blades directly affects the depth of field. A larger aperture will produce a shallow depth of field effect, blurring the background, while a smaller aperture will produce a deeper depth of field, making the whole image clear.

[0003] Patent CN205157821U discloses a manually adjustable multi-blade aperture system, including a base fixed to a lens. The base has an aperture hole forming an optical path. Multiple blades, rotatable to form apertures of different sizes, are arranged circumferentially within the base. The key feature is the addition of a manual adjustment device within the base for manually adjusting the rotation of the blades. This device includes a turntable rotatably mounted within the base, a handle located outside the turntable for rotating the turntable to drive the multiple blades, and a disc for limiting the rotation of the blades to form apertures of different sizes. This invention allows for aperture adjustment simply by manually moving the handle. After manual adjustment based on environmental factors, it can be used for extended periods without further adjustments, making it particularly suitable for applications such as fixed-point surveillance lenses and automotive lenses.

[0004] In the aforementioned patent, the blade design can cause errors in the angle between the motion guide post and the blade during the manufacturing process. When the aperture size is changed after assembly, the movement of the blade will be obstructed, thus affecting the imaging quality of the device. At the same time, because the blade itself is thin and there is direct contact between the blade and the aperture support in the prior art, the blade will deform due to obstruction during movement, which will damage the entire mechanism. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems by providing an aperture blade, an aperture driving assembly, and a lens driving device that can solve the above-mentioned technical issues.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An aperture blade includes a blade body and at least one motion guide post perpendicularly connected to the blade body. The aperture blade also includes a blade motion stabilizing block that contacts at least a partial surface of any surface in the thickness direction of the blade body. The motion guide post is fixed to the blade motion stabilizing block, and the blade motion stabilizing block and the blade body are connected by a concave-convex connection structure.

[0008] Furthermore, the blade motion stabilizing blocks are distributed along the length direction of the blade body, and the concave-convex connecting structure is distributed along the length direction of the blade body.

[0009] Furthermore, the concave-convex connection structure includes a positioning through hole on the blade body, and a protrusion inserted into the positioning through hole is provided on the blade motion stabilizing block.

[0010] Furthermore, the blade motion stabilizing block has a blade stabilizing plane that matches the local surface.

[0011] Furthermore, the protrusion and the blade stabilizing plane are perpendicularly connected.

[0012] Furthermore, the positioning through hole is any one or more combinations of a strip hole, an elliptical hole, a rhomboid hole, a triangular hole, and at least one circular hole, and the protrusion is a contour structure of the positioning through hole.

[0013] Furthermore, at least one process positioning hole is provided at the end of the blade body where the motion guide post is located.

[0014] Furthermore, there are two motion guide columns;

[0015] Along the length of the blade body, the two motion guide columns are spaced apart and parallel to each other.

[0016] This application also provides an aperture driving assembly, which includes the aperture blades.

[0017] This application also provides a lens driving device, which includes the aperture driving assembly.

[0018] Compared with existing technologies, the advantages of this application are as follows: This application utilizes the cooperation between the blade motion stabilizing block and the blade body to maintain the blade body sliding smoothly on a plane perpendicular to the optical axis. At the same time, since the blade motion stabilizing block lifts the blade body away from the aperture support, the blade body does not contact the aperture support, ensuring that the blade body will not bend or deform during the movement, thereby improving the service life of the equipment. Attached Figure Description

[0019] Figure 1 This is an exploded view of the main structure of the aperture blade of this utility model;

[0020] Figure 2 This is an exploded view of the main structure of the aperture driving component of this utility model;

[0021] Figure 3 This is an assembly drawing of the main structure of the aperture driving component of this utility model;

[0022] Figure 4 This is a schematic diagram of another concave-convex connection structure in Embodiment 2;

[0023] Figure 5 This is a schematic diagram illustrating an example of an electronic device in Example 4.

[0024] In the figure, there are: aperture bracket 1, front cover plate 1a, rear cover plate 1b, aperture drive frame 2, blade body 3, blade motion stabilizing block 30, motion guide post 301, concave-convex connection structure 302, positioning through hole 3020, protrusion 3021, blade stabilizing plane 303, process positioning hole 31, optical axis Z, positioning convex surface a, and positioning concave surface b. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] Example 1

[0027] like Figure 1 As shown, the aperture blade includes a blade body 3 and at least one motion guide post 301 perpendicularly connected to the blade body 3. The aperture blade also includes a blade motion stabilizing block 30 that contacts at least a partial surface of any surface in the thickness direction of the blade body 3. The motion guide post 301 is fixed to the blade motion stabilizing block 30, and the blade motion stabilizing block 30 and the blade body 3 are fixedly connected. In this embodiment, the blade motion stabilizing block 30 and the blade body 3 are connected by a concave-convex connection structure 302.

[0028] When the aperture moves open and closes, the blade motion stabilizing block 30 can keep the blade body 3 sliding smoothly on a plane perpendicular to the optical axis Z. At the same time, since the blade body 3 only contacts the blade motion stabilizing block 30, it can ensure that the blade body 3 will not bend or deform during the movement.

[0029] The blade motion stabilizing block 30 is distributed along the length direction of the blade body 3, and the concave-convex connecting structure 302 is also distributed along the length direction of the blade body 3. The length direction of the blade body 3 refers to the overall extension direction of the blade body 3, which can be a straight line or an arc with a certain curvature.

[0030] Distributing the blade motion stabilizing block 30 and the concave-convex connection structure 302 along the length of the blade body 3 can make the pressure inside the blade body 3 more evenly distributed, reducing the possibility of local stress concentration. By distributing the blade motion stabilizing block 30 and the concave-convex connection structure 302 along the length of the blade body 3, the overall rigidity of the blade body 3 can be increased, reducing the deformation and vibration of the blade body 3 during the motion process.

[0031] The concave-convex connection structure 302 includes a positioning through hole 3020 on the blade body 3 and a protrusion 3021 on the blade motion stabilizing block 30 that is inserted into the positioning through hole 3020. In other embodiments, the blade body 3 is provided with a protrusion 3021 and the blade motion stabilizing block 30 is provided with a positioning through hole 3020.

[0032] The protrusion 3021 and the positioning through hole 3020 are in a clearance fit or transition fit at their contact point. During the movement, the protrusion 3021 and the positioning through hole 3020 can ensure that there is little relative sliding between the blade body 3 and the blade motion stabilizing block 30.

[0033] The blade motion stabilizing block 30 has a blade stabilizing plane 303 that matches the local surface on the side where the protrusion 3021 is provided. The thickness of the protrusion 3021 is greater than the thickness of the blade body 3, which can prevent the blade body 3 from interfering with the surrounding structure.

[0034] The blade stabilizing plane 303 is in contact with at least a partial surface of any surface of the blade body 3 in the thickness direction. The blade stabilizing plane 303 lifts the blade body 3, so that the blade body 3 is in contact only with the blade motion stabilizing block 30.

[0035] The protrusion 3021 and the blade stabilizing plane 303 are perpendicularly connected.

[0036] The purpose of the above is to ensure that the blade body 3 and the motion guide column 301 are vertically distributed, so as to ensure stability and improve transmission efficiency.

[0037] The positioning through hole 3020 is any one or more combinations of a strip hole, an elliptical hole, a rhomboid hole, a triangular hole and at least one circular hole, and the protrusion 3021 is a contour structure of the positioning through hole 3020 and is adapted to the positioning through hole 3020.

[0038] In other embodiments, two or more protrusions 3021 and positioning through holes 3020 may be provided.

[0039] In this embodiment, the positioning through hole 3020 is designed as a strip hole. The advantages of this design are that the strip hole is easier to maintain its shape stability when subjected to force, and has higher strength and stability. The shape of the strip hole is relatively simple, the processing technology is relatively easy to control, the manufacturing cost is relatively low, and it is suitable for large-scale production and engineering applications.

[0040] The blade body 3 has at least one process positioning hole 31 at one end where the motion guide post 301 is provided.

[0041] There are two process positioning holes 31, and at least a portion of the positioning through hole 3020 is located in the center of the two process positioning holes 31.

[0042] The process positioning hole 31 plays a positioning role during the blade production and installation process, ensuring accurate positioning when machining the positioning through hole 3020.

[0043] There are two motion guide columns 301;

[0044] Along the length of the blade motion stabilizing block 30, two motion guide columns 301 are spaced apart and parallel to each other.

[0045] Of the two motion guide posts 301, one motion guide post 301 is rotatably connected to one of the aperture support 1 or the aperture drive frame 2, and the other motion guide post 301 is slidably connected to the other of the aperture support 1 or the aperture drive frame 2. The distance between the two motion guide posts 301 is 2-4mm, and the deflection angle of the blade body 3 can be adjusted by adjusting the distance between the two motion guide posts 301.

[0046] In other embodiments, two motion guide posts 301 may be formed on the two sides of the blade motion stabilizing block 30, and the two motion guide posts 301 extend in opposite directions.

[0047] Example 2

[0048] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the aperture blades of Embodiment 1, this embodiment proposes another concave-convex connection structure 302.

[0049] like Figure 4 As shown, the blade body 3 has a positioning protrusion a protruding onto the blade stabilizing plane 303 at the contact point with the blade stabilizing plane 303. Simultaneously, the blade stabilizing plane 303 has a positioning concave surface b corresponding to the positioning protrusion a. The positioning protrusion a and the positioning concave surface b can fit completely together without any offset or sliding. Because the blade body 3 itself possesses metallic elasticity and plasticity, the processing can be completed simply by stamping with a stamping machine.

[0050] Example 3

[0051] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that, for the aperture blades of Embodiment 1, the aperture driving assembly of this embodiment includes aperture blades.

[0052] like Figures 3-4 As shown, the aperture drive assembly also includes: an aperture support 1 and an aperture drive assembly. A front cover plate 1a is provided on one side of the aperture support 1, and a rear cover plate 1b is provided on the other side. A front cavity for accommodating the aperture blades is formed between the front cover plate 1a and the aperture support 1, and a rear cavity for accommodating the aperture drive assembly is formed between the rear cover plate 1b and the aperture support 1.

[0053] The aperture drive assembly includes an aperture drive mount 2 and a drive component;

[0054] The aperture drive frame 2 and the aperture support 1 are rotatably connected. The drive component is used to drive the aperture drive frame 2 to rotate around the optical axis. The drive component can be an SMA, an electromagnetic structure of a coil magnet, or a piezoelectric structure.

[0055] One of the motion guide posts 301 passes through the aperture bracket 1 and the aperture drive frame 2 in a rotatable connection, and is slidably connected to the aperture bracket 1 in the circumferential direction. The other motion guide post 301 is slidably connected to the aperture bracket 1 in the approximate radial direction. Under the action of the drive component, the aperture drive frame 2 rotates relative to the aperture bracket 1 and causes multiple blade motion stabilizing blocks 30 to slide relative to the aperture bracket 1, while driving multiple blade bodies 3 to move and changing the aperture of the light inlet.

[0056] Example 4

[0057] The structure and principle of this embodiment are basically the same as those of Embodiment 3. The difference lies in that, for the aperture driving component of Embodiment 3, the lens driving device of this embodiment includes an aperture driving component.

[0058] like Figure 5 As shown, camera modules are used in electronic devices, including 3C products such as computers, mobile smartphones, and digital cameras. In this embodiment, the module is used as a camera imaging component of a mobile smartphone.

[0059] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An aperture blade, comprising a blade body (3) and at least one motion guide post (301) perpendicularly connected to the blade body (3), characterized in that, The aperture blade also includes a blade motion stabilizing block (30) that contacts at least a partial surface of any surface in the thickness direction of the blade body (3). The motion guide post (301) is fixed on the blade motion stabilizing block (30), and the blade motion stabilizing block (30) and the blade body (3) are fixedly connected.

2. The aperture blade according to claim 1, characterized in that, The blade motion stabilizing block (30) and the blade body (3) are connected by a concave-convex connection structure (302).

3. The aperture blade according to claim 2, characterized in that, The blade motion stabilizing block (30) is distributed along the length direction of the blade body (3), and the concave-convex connection structure (302) is distributed along the length direction of the blade body (3).

4. The aperture blade according to claim 2, characterized in that, The concave-convex connection structure (302) includes a positioning through hole (3020) provided on the blade body (3), and a protrusion (3021) inserted into the positioning through hole (3020) is provided on the blade motion stabilizing block (30).

5. The aperture blade according to claim 4, characterized in that, The blade motion stabilizing block (30) has a blade stabilizing plane (303) that matches the local surface on the side where the protrusion (3021) is provided, and the thickness of the protrusion (3021) is greater than the thickness of the blade body (3).

6. The aperture blade according to claim 4, characterized in that, The positioning through hole (3020) is any one or more of the following: a strip hole, an elliptical hole, a rhomboid hole, a triangular hole, and at least one circular hole. The protrusion (3021) structure is adapted to the positioning through hole (3020).

7. The aperture blade according to claim 1, characterized in that, The blade body (3) is provided with at least one process positioning hole (31).

8. The aperture blade according to claim 1, characterized in that, There are two motion guide columns (301); The two motion guide columns (301) are spaced apart and parallel to each other and are arranged on the blade motion stabilizing block (30).

9. An aperture driving assembly, characterized in that, The aperture driving assembly includes the aperture blades as described in any one of claims 1-8, as well as the aperture support (1) and the aperture driving assembly. A front cover plate is provided on one side of the aperture support (1), and a rear cover plate is provided on the other side. A front cavity for accommodating the aperture blades is formed between the front cover plate and the aperture support (1), and a rear cavity for accommodating the aperture driving assembly is formed between the rear cover plate and the aperture support (1).

10. A lens driving device, characterized in that, The lens driving device includes the aperture driving component as described in claim 9.

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