Aperture support, aperture driving mechanism and lens driving module

Abstract

The utility model relates to a kind of aperture support, aperture drive mechanism and lens drive module, including aperture support ontology, trajectory path along and the radial angle of the aperture support ontology is set and / or trajectory path is set along the circumferential of the aperture support ontology trajectory groove / hole, at least two blade column lock positions are provided on the trajectory path of the trajectory groove / hole, different the blade column lock position is used to realize the different size of the light hole aperture surrounded by several aperture blades.This application advantage: utilize the trajectory groove / hole with multiple blade column lock positions, so that the precision of controlling aperture is greatly improved, and the anti-interference ability of mechanism is improved, when the vibration of external adverse factors is influenced, aperture blade is not affected due to the existence of lock catch spring piece.

Description

Technical Field

[0001] This application belongs to the field of camera equipment components, and particularly relates to an aperture bracket, an aperture driving mechanism, and a lens driving module. Background Technology

[0002] Miniature cameras used in mobile phones typically feature a variable aperture mounted on the front of the lens. The aperture size is usually controlled by a closed-loop position sensor, which complicates the variable aperture circuitry and increases weight and cost.

[0003] Patent CN207008256U discloses a stepper-driven multi-blade automatic aperture module, which includes an aperture base plate, an aperture back plate, an aperture lever, and a stepper motor. The aperture lever has multiple blades, one end of which has a positioning hole and a waist-shaped hole. The aperture base plate has multiple first cylinders evenly distributed along its circumference, and the aperture lever has multiple second cylinders evenly distributed along its circumference, along with the same number of through holes as the second cylinders. The first cylinders on the aperture base plate pass through the positioning holes on the blades, and the second cylinders pass through the waist-shaped holes on the blades. This invention allows users to precisely adjust the aperture size as needed, thereby greatly improving image quality. Driven by a stepper motor, the aperture module of this invention can automatically adjust the aperture size as required, avoiding errors caused by manual operation and improving the accuracy of aperture adjustment.

[0004] In the aforementioned patents and prior art, the track groove / hole connecting the aperture blades and the aperture support is a smooth, curved waist-shaped hole. This design results in low aperture control precision during mechanism operation and is easily affected by external vibrations, causing instability in aperture size and ultimately leading to unclear imaging. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned problems by providing an aperture bracket, an aperture driving mechanism, and a lens driving module that can solve the aforementioned technical problems.

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

[0007] An aperture support includes an aperture support body, on which a track groove / hole is provided with a track path along and at a radial angle to the aperture support body and / or the track path is provided along the circumference of the aperture support body. At least two blade column locking positions are provided on the track path of the track groove / hole, and different blade column locking positions are used to realize different sizes of aperture diameters surrounded by a number of aperture blades.

[0008] Furthermore, the groove / hole wall of the track groove / hole is provided with a plurality of locking recesses, and the aperture bracket body is provided with a locking spring that extends at least partially into the track groove / hole. The locking spring has a locking mating surface that corresponds one-to-one with the locking recesses. One locking recess and one locking mating surface surround one blade column locking position.

[0009] Furthermore, two adjacent locking concave surfaces are connected by an arc-shaped transition convex surface; or two adjacent locking concave surfaces are connected by a transition plane.

[0010] Furthermore, the portion of the locking spring that extends into the track groove / hole has an arched structure, and the locking mating surface is located on the outer arched surface of the arched structure near the locking concave surface.

[0011] Furthermore, a spring fixing groove is provided on the aperture bracket body that communicates with the track groove / hole. The section of the locking spring away from the arched structure is fixed in the spring fixing groove. The arched structure extends into the track groove / hole from the point where the spring fixing groove and the track groove / hole communicate.

[0012] Furthermore, the width of the spring fixing groove is greater than the thickness of the locking spring, and the section of the locking spring away from the arched structure elastically abuts against the top of the groove wall opposite to the two groove walls of the spring fixing groove.

[0013] Furthermore, a deformation avoidance gap is left between the arched structure and the side wall of the spring fixing groove away from the through-hole.

[0014] Furthermore, when projected onto a plane perpendicular to the optical axis, the inner diameter d1 of the blade column locking position is greater than the inner diameter d2 of the connection between two adjacent blade column locking positions.

[0015] This application also provides an aperture driving mechanism, which includes the aperture support.

[0016] This application also provides a lens driving module, which includes the aperture driving mechanism.

[0017] Compared with existing technologies, the advantages of this application are: by using a track groove / hole with multiple blade column locking positions, the accuracy of controlling the aperture is greatly improved, and the mechanism's ability to resist interference is enhanced. When external adverse factors cause vibration, the aperture blades will not be affected due to the presence of the locking spring. Attached Figure Description

[0018] Figure 1 This is a front view of the aperture support body structure of this utility model;

[0019] Figure 2 for Figure 1 Detailed diagram of the main structure of area A of the mid-aperture bracket;

[0020] Figure 3 for Figure 1 Detailed diagram of the main structure of area B of the mid-aperture bracket;

[0021] Figure 4 This is a top view of the aperture support body structure of this utility model;

[0022] Figure 5 for Figure 4 Detailed diagram of the main structure of the C region of the mid-aperture bracket;

[0023] Figure 6 The main view of the aperture bracket main structure assembly of this utility model;

[0024] Figure 7 A bottom view of the main structure of the aperture bracket of this utility model;

[0025] Figure 8 This is a front view of the main structure of the locking spring of this utility model;

[0026] Figure 9 for Figure 8 Top view of the main structure of the central locking spring;

[0027] Figure 10 This is a front view of the aperture blades of this utility model;

[0028] Figure 11 This is a bottom view of the aperture blades of this utility model;

[0029] Figure 12 This diagram shows the positional relationship between the drive rod and the guide rod of this utility model.

[0030] Figure 13 This is a schematic diagram illustrating an example of an electronic device equipped with the lens driving module of Embodiment 4.

[0031] In the figure, the aperture support body 1, track groove / hole 10, locking concave surface 10a, arc transition convex surface 10b, blade column locking position 100, spring fixing groove 11, deformation avoidance distance 11b, through part 12, turnover groove 13, aperture blade 2, drive rod 20, guide rod 21, locking spring 3, locking mating surface 30, arch structure 31, groove wall abutting the top 32, rotation drive assembly 4, aperture drive frame 40, shape memory alloy wire 41, plane xY, optical axis Z, inner diameter d1, inner diameter d2. Detailed Implementation

[0032] 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.

[0033] Example 1

[0034] like Figures 1-7 As shown, the aperture support includes an aperture support body 1. The aperture support body 1 has a track groove 10 with the track path set along the radial angle of the aperture support body 1 and / or the track path set along the circumference of the aperture support body 1. At least two blade column locking positions 100 are provided on the track path of the track groove 10. The blade column locking positions 100 control the size of the aperture diameter surrounded by a plurality of aperture blades 2.

[0035] A track groove along the circumference of the aperture support body 1 is defined as a turnover groove 13, and a track groove along the radial angle of the aperture support body 1 is defined as a deflection groove. The deflection groove is also angled to the turnover groove 13. In this embodiment, only the blade column locking position 100 is provided in the deflection groove. In other embodiments, the blade column locking position 100 may be provided only in the turnover groove 13, or it may be provided in both the turnover groove 13 and the deflection groove. In other embodiments, the deflection groove may be provided alone without the turnover groove 13, or the turnover groove 13 may be provided alone without the deflection groove.

[0036] By setting multiple blade post locking positions 100 on the trajectory path, the aperture size of the light aperture surrounded by the aperture blades 2 can be precisely controlled. The blade post locking positions 100 can be used to change different deflection angles of the aperture blades 2, thereby increasing the flexibility and adjustability of the aperture blades 2. At the same time, open-loop control can be realized, so the size of the aperture can be adjusted as needed to control the light transmission and improve the clarity and quality of the image.

[0037] The line connecting the center points of each blade column locking position 100 of the track groove 10 can be designed according to the actual effect. In this embodiment, the track groove 10 has three blade column locking positions 100, and the line connecting the center points of the three blade column locking positions 100 forms a "V" shape.

[0038] The track groove 10 has multiple locking recesses 10a on its groove wall. A locking spring 3, at least partially extending into the track groove 10, is provided on the aperture support body 1. Each locking spring 3 has a locking mating surface 30 corresponding to one of the locking recesses 10a. One locking recess 10a and one locking mating surface 30 define a blade post locking position 100. The locking mating surface 30 can be a plane or an arc surface, and multiple locking mating surfaces 30 can also form a single arc surface. In other embodiments, the locking spring 3 can be replaced with other elastic materials with elastic deformation capabilities.

[0039] In this embodiment, the locking concave surface 10a is an arc surface. In other embodiments, the locking concave surface 10a may also be a plane or a folded surface formed by at least two planes.

[0040] like Figures 8-9 As shown, the locking spring 3 presses the portion of the aperture blade 2 structure extending into the track groove 10 against the locking concave surface 10a, thereby achieving a locking effect. When the aperture blade 2 is driven to move in the track groove 10, the locking spring 3 applies pressure to the aperture blade 2, allowing the aperture blade 2 to move stably in the track groove 10. The locking mating surface 30 can be either a locking mating plane or an arc-shaped locking mating convex surface.

[0041] Two adjacent locking concave surfaces 10a are connected by an arc-shaped transition convex surface 10b; or two adjacent locking concave surfaces 10a are connected by a transition plane.

[0042] By introducing an arc-shaped transition convex surface 10b or a transition plane, a smooth transition between two adjacent locking concave surfaces 10a can be achieved. This design can reduce abrupt changes or gaps between locking concave surfaces 10a, while reducing friction and wear between adjacent components, thus improving the stability and lifespan of the system.

[0043] The portion of the locking spring 3 that extends into the track groove 10 is an arched structure 31, and the locking mating surface 30 is located on the outer arched surface of the arched structure 31 near the locking concave surface 10a.

[0044] The arched structure design of the locking spring 3 can increase the strength and stability of the locking spring 3 and reduce the possibility of deformation or damage during use.

[0045] A spring fixing groove 11 is provided on the aperture bracket body 1, which is connected to the track groove 10. The section of the locking spring 3 away from the arch structure 31 is fixed in the spring fixing groove 11. The arch structure 31 extends into the track groove 10 from the connection 12 between the spring fixing groove 11 and the track groove 10.

[0046] Before assembly, the part of the locking spring 3 that is fixed to the spring fixing groove 11 is in the shape of a "U" with an opening angle greater than 90°. When the locking spring 3 is placed in the spring fixing groove 11, the part of the locking spring 3 that is fixed to the spring fixing groove 11 will always abut against the spring fixing groove 11, so that the locking spring 3 can be fixed in the spring fixing groove 11 and will not fall off.

[0047] The width of the spring fixing groove 11 is greater than the thickness of the locking spring 3. The section of the locking spring 3 away from the arch structure 31 has elasticity and abuts against the top 32 of the groove wall opposite to the two groove walls of the spring fixing groove 11.

[0048] In this embodiment, the groove wall at the top 32 is U-shaped.

[0049] A deformation clearance gap 11b is left between the arched structure 31 and the side wall of the spring fixing groove 11 away from the through-hole 12.

[0050] When the aperture blade 2 is driven to move, the locking spring 3 will be squeezed by the aperture blade 2. The deformation clearance distance 11b can provide clearance space for the locking spring 3 to deform and reset.

[0051] Projected onto a plane perpendicular to the optical axis Z, the inner diameter d1 of the blade column locking position 100 is greater than the inner diameter d2 of the connection between two adjacent blade column locking positions 100.

[0052] By setting different inner diameters between the blade column locking positions 100, the assembly accuracy and stability of the blade column can be improved. This helps ensure the accuracy and stability of the aperture blade 2 during installation and operation, reducing jamming and wear, and improving assembly accuracy, among other benefits.

[0053] Example 2

[0054] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the trajectory groove of Embodiment 1, this embodiment provides a new trajectory hole.

[0055] An aperture support includes an aperture support body 1. The aperture support body 1 has a track hole with a track path set at an angle to the radial direction of the aperture support body 1. Multiple blade column locking positions 100 are provided on the track path of the track hole. The blade column locking positions 100 control the size of the aperture diameter surrounded by a number of aperture blades 2.

[0056] By setting multiple blade column locking positions 100 on the trajectory path, the aperture size of the light aperture surrounded by the aperture blades 2 can be precisely controlled. The blade column locking positions 100 can be adjusted along the radial angle, thereby increasing the flexibility and adjustability of the aperture blades 2. This allows the aperture size to be adjusted as needed, thereby controlling the light transmission and improving the clarity and quality of the image.

[0057] The line connecting the center points of each blade post locking position 100 of the track hole can be designed according to the actual effect. In this embodiment, the track hole has three blade post locking positions 100, and the line connecting the center points of the three blade post locking positions 100 forms a "V" shape.

[0058] Example 3

[0059] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that, for the aperture support in Embodiment 1, the aperture driving mechanism in this embodiment includes an aperture support.

[0060] In this embodiment, there are multiple aperture blades 2, and each aperture blade 2 corresponds to a rotation groove 13 and a deflection groove.

[0061] The aperture drive mechanism also includes a rotary drive assembly 4 that drives a plurality of aperture blades 2 to move relative to the aperture support 1 in a plane xY perpendicular to the optical axis Z. The rotary drive assembly 4 includes an aperture drive frame 40 that rotates relative to the aperture support 1, and at least two shape memory alloy wires 41 that are respectively connected to the aperture support 1 and the aperture drive frame 40. One end of the shape memory alloy wire 41 is fixedly connected to the aperture support 1, and the other end is fixedly connected to the aperture drive frame 40. In other embodiments, piezoelectric drive or electromagnetic drive can be used instead of shape memory alloy wires 41 as the drive element to achieve the rotation of the aperture drive frame 40 around the optical axis.

[0062] like Figures 10-11 As shown, in this embodiment, the aperture blade 2 is provided with a drive rod 20 and a guide rod 21. The drive rod 20 passes through the rotating groove 13 and is rotatably connected to the aperture drive frame 40. The drive rod 20 slides in the rotating groove 13, and the guide rod 21 is inserted into the deflection groove. Specifically, under the pull of the drive component, the aperture drive frame 40 drives the drive rod 20 of the aperture blade 2 to slide in the rotating groove 13, while the guide rod 21 moves in the deflection groove. When the drive rod 20 moves to position A and the guide rod 21 moves to position a, the locking spring 3 locks the guide rod 20. When the guide rod 21 moves to position b, the locking spring 3 presses the guide rod 21 against the locking concave surface 10a at position b, and the aperture formed by the multiple aperture blades 2 is at the middle value. When the drive rod 20 moves to position c, the locking spring 3 presses the guide rod 21 against the locking concave surface 10a at position c, and the aperture formed by the multiple aperture blades 2 is at the smallest value.

[0063] Example 4

[0064] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the aperture driving mechanism of Embodiment 3 above, the lens driving module of this embodiment includes an aperture driving mechanism.

[0065] The aperture drive mechanism is fixed at the front end of the lens in the lens drive device. At the same time, the lens drive module is connected to the external control circuit. External light passes through the aperture drive assembly and enters the lens in the lens drive device, where it is refracted and finally reaches the imaging area of ​​the device.

[0066] 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 support, comprising an aperture support body (1), characterized in that, The aperture support body (1) is provided with a track groove / hole (10) with the track path set at a radial angle to the aperture support body (1) and / or the track path set along the circumference of the aperture support body (1). At least two blade column locking positions (100) are provided on the track path of the track groove / hole (10). Different blade column locking positions (100) are used to realize different sizes of aperture diameters surrounded by a number of aperture blades (2).

2. The aperture support according to claim 1, characterized in that, The groove / hole (10) has multiple locking recesses (10a) on its wall. The aperture bracket body (1) has a locking spring (3) that extends into the groove / hole (10) at least partially. The locking spring (3) has a locking mating surface (30) that corresponds one-to-one with the locking recesses (10a). One locking recess (10a) and one locking mating surface (30) together form a blade column locking position (100).

3. The aperture support according to claim 2, characterized in that, Two adjacent locking concave surfaces (10a) are connected by an arc-shaped transition convex surface (10b); or two adjacent locking concave surfaces (10a) are connected by a transition plane.

4. The aperture bracket according to claim 2, characterized in that, The portion of the locking spring (3) that extends into the track groove / hole (10) is an arched structure (31), and the locking mating surface (30) is located on the outer arched surface of the arched structure (31) near the locking concave surface (10a).

5. The aperture support according to claim 4, characterized in that, A spring fixing groove (11) is provided on the aperture bracket body (1) and communicates with the track groove / hole (10). The locking spring (3) is fixed in the spring fixing groove (11) at a section away from the arch structure (31). The arch structure (31) extends into the track groove / hole (10) from the point (12) where the spring fixing groove (11) and the track groove / hole (10) communicate.

6. The aperture bracket according to claim 5, characterized in that, The width of the spring fixing groove (11) is greater than the thickness of the locking spring (3), and a section of the locking spring (3) away from the arch structure (31) elastically abuts against the top of the groove wall of the opposite two groove walls of the spring fixing groove (11) (32).

7. The aperture support according to claim 5, characterized in that, A deformation clearance distance (11b) is left between the arched structure (31) and the side wall of the spring fixing groove (11) away from the through-hole (12).

8. The aperture support according to claim 1, characterized in that, Projected onto a plane perpendicular to the optical axis (Z), the inner diameter d1 of the blade column locking position (100) is greater than the inner diameter d2 of the connection between two adjacent blade column locking positions (100).

9. An aperture driving mechanism, characterized in that, The aperture driving mechanism includes the aperture support as described in any one of claims 1-8.

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

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