Variable aperture rotating mechanism and variable aperture

Abstract

The utility model discloses a variable aperture rotating mechanism, which comprises a light through hole enclosed by a plurality of blades connected into a ring shape, and the blades are connected with a rotating piece, so that the area of the light through hole can be changed when the rotating piece rotates; the rotating piece rotates on the base through a plurality of balls arranged between the base and the rotating piece; the adsorption part I and the adsorption part II are arranged on the base and the rotating part respectively and can be adsorbed with each other. According to the variable aperture rotating mechanism with the structure, the ball is used as an auxiliary rotating part, so that the rotating part rotates on the base more smoothly. And through the adsorption part I and the adsorption part II which are adsorbed with each other, the base and the rotating piece are tightly combined in the rotating process, and falling is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical imaging, and in particular relates to a variable aperture rotation mechanism and a variable aperture. Background Art

[0002] With the rapid development of mobile phones, tablets, and other terminal devices, their camera functions have become a major focus for users. To meet higher-quality photography requirements, variable apertures are increasingly being used in mobile phones, tablets, and other terminal devices. In low-light conditions, a large aperture is used to increase light intake; or when shooting portraits or close-ups, a large aperture is used to reduce the depth of field, blurring the background and highlighting the subject. In well-lit areas, when capturing landscapes like car tracks and star trails, a small aperture is used to deepen the depth of field and ensure clarity of objects within the frame.

[0003] Existing variable aperture irises use a rotating member to drive the blades to rotate, thereby changing the diameter of the light hole formed by the blades to achieve variable aperture. However, due to the complex structure and low reliability of the existing rotating mechanism, it is easy to cause problems such as eccentricity of the aperture structure. Utility Model Content

[0004] In view of this, the present invention provides a variable aperture rotation mechanism and a variable aperture, which have a simple structure and high reliability, and can effectively prevent the rotating part from floating in the vertical direction.

[0005] In order to solve the above technical problems, the technical solution of the present invention is to adopt a variable aperture rotation mechanism, including a light hole surrounded by a plurality of blades connected in a ring shape, and the blades are connected to a rotating member so that the area of ​​the light hole can be changed when the rotating member rotates; it also includes a base, and the rotating member rotates on the base by relying on a plurality of balls arranged between the base and the rotating member; it also includes an adsorption component I and an adsorption component II respectively arranged on the base and the rotating member and can adsorb each other.

[0006] As an improvement, the base is provided with an annular groove for accommodating the rotating part, and a boss is provided along the bottom of the annular groove; a positioning groove is provided on the rotating part to cooperate with the boss; and a fracture is provided on the boss to accommodate the ball.

[0007] As a further improvement, the number of the balls is 3 to 6 and they are evenly distributed along the circumference.

[0008] As another further improvement, the adsorption component I is a permanent magnet, and the adsorption component II is a steel sheet; or, the adsorption component I is a steel sheet, and the adsorption component II is a permanent magnet.

[0009] As an improvement, the adsorption component I and the adsorption component II are both symmetrically arranged.

[0010] As an improvement, it also includes a brake for driving the rotating part to rotate; the brake is a piezoelectric telescopic motor; it also includes a clamping mechanism fixed on the rotating part, the clamping mechanism clamps the telescopic rod of the piezoelectric telescopic motor, so that when the telescopic rod is extended or retracted, the rotating part can be driven to rotate.

[0011] As an improvement, the clamping mechanism is connected to a mounting ring, and the mounting ring is provided with a positioning hole that cooperates with the guide column on the rotating member.

[0012] As an improvement, the rotating member is provided with a HALL permanent magnet for inducing the rotation of the rotating member.

[0013] The utility model also provides a variable aperture, comprising the variable aperture rotating mechanism mentioned above.

[0014] As an improvement, it also includes a top cover that can be snapped together with the base; the top cover includes an annular top cover body and an annular reinforcement embedded in the top cover body; the material strength of the annular reinforcement is higher than the material strength of the top cover body.

[0015] The utility model is beneficial in that:

[0016] The variable aperture rotation mechanism with the above structure uses balls as auxiliary rotating components, making the rotation of the rotating member on the base smoother and more fluid. Furthermore, through the mutually adsorbing adsorption components I and II, the base and the rotating member are tightly coupled during rotation, preventing them from falling off.

[0017] To help the ball bearings assist the rotating member, the base is provided with an annular groove for accommodating the rotating member. A boss is located along the bottom of the groove within the groove. The rotating member is provided with a positioning groove that mates with the boss. The boss also has a notch for accommodating the ball bearings. This arrangement not only ensures the rotating member and base are positioned and rotated to prevent deviation, but also constrains the ball bearings in six directions: the boss notch, the bottom and side walls of the base, and the top and side walls of the rotating member, ensuring that the ball bearings can rotate only in their original position, thus effectively assisting the rotating member. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of Example 1 of the present utility model.

[0019] Figure 2 This is a schematic diagram of the bottom structure of the rotating part in Example 1 of the present utility model.

[0020] Figure 3This is a schematic diagram of the internal structure of the base in Example 1 of the present utility model.

[0021] Figure 4 This is an enlarged cross-sectional view of the ball in Example 1 of the present invention.

[0022] Figure 5 This is an exploded view of Example 2 of the present utility model.

[0023] Markings in the figure:

[0024] 1-Iris iris top cover; 2-Upper gasket; 3-Blades; 4-Lower gasket; 5-Clamping structure; 6-Rotating part; 7-Permanent magnet; 8-HALL permanent magnet; 9-Ball; 10-Brake; 11-Steel sheet; 12-Base; 13-FPC;

[0025] 101 - top cover body; 102 - annular reinforcement; 61 - positioning groove; 62 - guide column; 121 - boss; 122 - annular groove. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0027] Example 1

[0028] like Figure 1 As shown, the present invention provides a variable aperture rotation mechanism, comprising a light aperture surrounded by a plurality of blades 3 connected in a ring shape. The blades 3 are connected to a rotating member 6, such that the area of ​​the light aperture can be changed when the rotating member 6 rotates. In some embodiments, an upper gasket 2 and a lower gasket 4 are provided on the top and bottom surfaces of the blades 3, respectively. The mechanism also includes a base 12, on which the rotating member 6 rotates by means of a plurality of balls 9 disposed between the base 12 and the rotating member 6. Furthermore, the mechanism also includes an adsorption component I and an adsorption component II, respectively disposed on the base 12 and the rotating member 6, capable of adsorbing each other.

[0029] The principle of the present invention is to use the ball 9 as an auxiliary rotating component to make the rotation of the rotating member 6 on the base 12 smoother and more fluent. And through the mutually adsorbed adsorption component I and adsorption component II, the base 12 and the rotating member 6 are tightly combined during the rotation process to prevent them from falling off.

[0030] like Figure 2 、 Figure 3 、 Figure 4As shown, more specifically, the base 12 is provided with an annular groove 122 for accommodating the rotating member 6. A boss 121 is provided along the bottom of the annular groove 122 within the annular groove 122. A positioning groove 61 is formed on the rotating member 6 to mate with the boss 121. The boss 121 also has a notch for accommodating the ball 9. This arrangement not only ensures the rotating member 6 and the base 12 are positioned and rotated to prevent deviation, but also limits the ball 9 in six directions: the notch end face of the boss 121, the bottom and side walls of the annular groove 122 in the base 12, and the top and side walls of the positioning groove 61 in the rotating member 6. This ensures that the ball 9 can only rotate in place, thereby effectively assisting the rotation of the rotating member 6.

[0031] In this embodiment, there are 3 to 6 balls 9, which are evenly distributed along the circumference. The number of balls 9 can be adjusted according to actual needs and is not limited in this utility model.

[0032] In this embodiment, the adsorption component I is a permanent magnet 7, and the adsorption component II is a steel sheet 11; alternatively, the adsorption component I is a steel sheet 11, and the adsorption component II is a permanent magnet 7. The adsorption effect of the permanent magnet 7 and the steel sheet 11 ensures that the rotating member remains tightly coupled to the base during rotation. It is foreseeable that both the adsorption component I and the adsorption component II can be permanent magnets.

[0033] In order to make the rotating member 6 and the base 12 more firmly adsorbed and avoid unilateral adsorption, the adsorption component I and the adsorption component II are both symmetrically arranged.

[0034] The present invention also includes a brake 10 for driving the rotating member 6 to rotate; the brake 10 is a piezoelectric telescopic motor; and a clamping mechanism 5 fixed to the rotating member 6. The clamping mechanism 5 clamps the telescopic rod of the piezoelectric telescopic motor, so that when the telescopic rod is extended or retracted, it can drive the rotating member 6 to rotate. A piezoelectric telescopic motor is an electric motor that uses the piezoelectric inverse effect of a piezoelectric element to convert electromechanical energy. The telescopic rod is extended or retracted by energizing the piezoelectric element. Because the clamping mechanism 5 fixed to the rotating member 6 clamps the telescopic rod, the extension and retraction of the telescopic rod drives the clamping mechanism 5 in a certain direction, thereby driving the rotating member 6 to rotate at a certain angle.

[0035] More specifically, the clamping mechanism 5 is connected to a mounting ring, and the mounting ring is provided with positioning holes that cooperate with the guide posts 62 on the rotating member 6, thereby linking the clamping mechanism 5 with the rotating member 6.

[0036] Furthermore, the rotating member 6 is provided with a Hall permanent magnet 8 for sensing the rotation of the rotating member 6. Hall permanent magnet 8 can sense the rotation angle of the rotating member 6, thereby implementing closed-loop control. The base 12 is also provided with an FPC 13 (flexible printed circuit board) for powering the brake 10, among other functions.

[0037] Example 2

[0038] like Figure 5 As shown, the present invention also provides a variable aperture iris, including the aforementioned variable aperture rotation mechanism. Furthermore, it includes a top cover 1 that can be snapped onto a base 12. The top cover 1 includes an annular top cover body 101 and an annular reinforcement 102 that engages with the top cover body 101. The material strength of the annular reinforcement 102 is greater than that of the top cover body 101. For example, the top cover body 101 is injection molded, while the annular reinforcement 102 is made of metal.

[0039] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A variable aperture rotation mechanism, characterized by: It includes a light hole surrounded by a plurality of blades connected in a ring shape, and the blades are connected to a rotating member so that the area of ​​the light hole can be changed when the rotating member rotates; it also includes a base, and the rotating member rotates on the base by relying on a plurality of balls arranged between the base and the rotating member; it also includes an adsorption component I and an adsorption component II respectively arranged on the base and the rotating member and can adsorb each other.

2. The variable aperture rotation mechanism according to claim 1, characterized in that: The base is provided with an annular groove for accommodating the rotating member, and a boss is provided along the bottom of the annular groove; the rotating member is provided with a positioning groove that cooperates with the boss; and the boss is provided with a fracture for accommodating a ball.

3. The variable aperture rotation mechanism according to claim 1, characterized in that: The number of the balls is 3 to 6 and they are evenly distributed along the circumference.

4. The variable aperture rotation mechanism according to claim 1, characterized in that: The adsorption component I is a permanent magnet, and the adsorption component II is a steel sheet; or the adsorption component I is a steel sheet, and the adsorption component II is a permanent magnet.

5. The variable aperture rotation mechanism according to claim 1, characterized in that: The adsorption component I and the adsorption component II are both symmetrically arranged.

6. The variable aperture rotation mechanism according to claim 1, characterized in that: It also includes a brake for driving the rotating part to rotate; the brake is a piezoelectric telescopic motor; it also includes a clamping mechanism fixed on the rotating part, the clamping mechanism clamps the telescopic rod of the piezoelectric telescopic motor, so that when the telescopic rod is extended or retracted, the rotating part can be driven to rotate.

7. The variable aperture rotation mechanism according to claim 6, characterized in that: The clamping mechanism is connected to a mounting ring, and the mounting ring is provided with a positioning hole that cooperates with a guide column on the rotating member.

8. The variable aperture rotation mechanism according to claim 1, characterized in that: The rotating part is provided with a HALL permanent magnet for inducing the rotation of the rotating part.

9. A variable aperture, characterized in that: The invention comprises the variable aperture rotation mechanism according to any one of claims 1 to 8.

10. The variable aperture according to claim 9, characterized in that: It also includes a top cover that can be buckled with the base; the top cover includes an annular top cover body and an annular reinforcement embedded in the top cover body; the material strength of the annular reinforcement is higher than the material strength of the top cover body.

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