Variable aperture top cover and variable aperture mechanism

Abstract

The utility model discloses a variable aperture top cover which comprises an annular top cover body and an annular reinforcing piece embedded in the top cover body. The material strength of the annular reinforcing piece is higher than that of the top cover body. According to the variable aperture top cover with the structure, the annular reinforcing piece with higher strength is embedded with the top cover body, so that the strength of the top cover body is increased, and the deformation of the top cover is avoided in the movement process of changing the aperture.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical imaging, and in particular relates to a top cover of a variable aperture and a variable aperture mechanism. 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] The top cover of an existing variable aperture iris is typically an injection molded part. During use (to adjust the aperture), the top cover is subject to the pull of the blades. Due to the relatively poor strength of injection molded parts, they can deform after repeated use, affecting the performance of the entire variable aperture. Utility Model Content

[0004] In view of this, the utility model provides a variable aperture top cover and a variable aperture mechanism, which improve the strength of the variable aperture top cover and avoid deformation.

[0005] In order to solve the above technical problems, the technical solution of the present invention is to adopt a variable aperture top cover, including an annular top cover body and an annular reinforcement member embedded in the top cover body; the material strength of the annular reinforcement member is higher than the material strength of the top cover body.

[0006] As an improvement, an annular limiting groove is provided on the top cover body, and the annular reinforcement is fixed in the limiting groove; and the annular reinforcement is flush with the inner annular surface of the top cover body.

[0007] As a further improvement, a plurality of sheet-like self-locking parts are radially arranged on the outer ring surface of the annular reinforcement, and self-locking holes are opened on the self-locking parts; the top cover body is injection molded, so that during injection molding, the injection molding material can solidify and form in the self-locking holes.

[0008] As another further improvement, the self-locking member includes a base plate connected to the annular reinforcement member, the self-locking hole is opened on the base plate; and a reinforcement strip extending outward is provided on the outer side of the base plate.

[0009] As an improvement, the self-locking member and the annular reinforcement member are not on the same plane.

[0010] As an improvement, the self-locking member is bent toward one side of the bottom of the annular reinforcement member.

[0011] As an improvement, the annular reinforcement is made of metal, and its surface is painted black.

[0012] As an improvement, a limiting boss that cooperates with the base of the variable aperture mechanism is provided on the top cover body.

[0013] The present invention also provides a variable aperture mechanism, comprising the variable aperture top cover.

[0014] As an improvement, the invention further includes a light hole assembly formed by a plurality of blades connected in a ring shape; the blades are connected to a rotating member so that the area of ​​the light hole can be changed when the rotating member rotates; the invention also includes a base that is snap-fitted with the variable aperture top cover, the light hole assembly and the rotating member are arranged in a cavity formed by the variable aperture top cover and the base; the rotating member is driven to rotate by a brake.

[0015] The utility model is beneficial in that:

[0016] The variable aperture top cover with the above structure utilizes a stronger annular reinforcement member to be engaged with the top cover body, thereby increasing the strength of the top cover body and preventing deformation of the top cover during the movement of aperture change.

[0017] The annular reinforcement increases the strength of the top cover without increasing the volume of the top cover. For a precise variable aperture mechanism, there is no need to reconsider the space occupied by the top cover.

[0018] In order to make the annular reinforcement and the top cover body fit more firmly, a number of sheet-like self-locking parts are radially arranged on the outer ring surface of the annular reinforcement, and self-locking holes are opened on the self-locking parts; the top cover body is injection molded, so that during injection molding, the injection molding material can solidify and form in the self-locking holes.

[0019] In order to avoid reflection of the metal annular reinforcement, the surface of the annular reinforcement is painted black. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of Example 1 of the present utility model.

[0021] Figure 2 This is a three-dimensional view from another angle of embodiment 1 of the present invention.

[0022] Figure 3 This is an exploded view of Example 1 of the present utility model.

[0023] Figure 4 This is a partially enlarged view of the annular reinforcement member in Example 1 of the present utility model.

[0024] Figure 5 This is an exploded view of Example 2 of the present utility model.

[0025] Markings in the figure:

[0026] 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;

[0027] 101 - top cover body; 102 - annular reinforcement; 103 - limiting boss; 104 - avoidance groove; 1021 - base plate; 1022 - self-locking hole; 1023 - reinforcement strip. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] like Figures 1 to 3 As shown, the present invention provides a variable aperture top cover 1, comprising an annular top cover body 101 and an annular reinforcement 102 embedded in the top cover body 101; the material strength of the annular reinforcement 102 is higher than the material strength of the top cover body.

[0031] The principle of the present invention is to utilize a stronger annular reinforcement 102 to engage with the top cover body 101, thereby increasing the strength of the top cover body 101 and preventing the top cover from deforming during the movement of changing the aperture.

[0032] Specifically, the top cover body 101 has an annular retaining groove, into which the annular reinforcement member 102 is secured. Furthermore, the annular reinforcement member 102 is flush with the inner surface of the top cover body. This arrangement increases the strength of the top cover without increasing its size, eliminating the need to reconsider the space occupied by the top cover for precision variable aperture mechanisms.

[0033] To ensure a more secure fit between the annular reinforcement 102 and the top cover body 101, in this embodiment, the annular reinforcement 102 is radially provided with a plurality of self-locking pieces, each with self-locking holes 1022. The top cover body 101 is injection molded, allowing the injection molding material to solidify within the self-locking holes 1022 during the injection molding process. After cooling, the injection molding material automatically forms a pin within the self-locking holes 1022, firmly connecting the top cover body 101 and the annular reinforcement 102.

[0034] In some embodiments, there are multiple self-locking elements, for example six, and they are evenly distributed on the outer annular surface of the annular reinforcement 102 .

[0035] like Figure 4 More specifically, the self-locking member includes a base plate 1021 connected to the annular reinforcement member 102, with the self-locking hole 1022 formed in the base plate 1021. An outwardly extending reinforcement strip 1023 is provided on the outer side of the base plate 1021. The reinforcement strip 1023 increases the engagement area with the top cover body 101, increasing friction and thereby securing the two together more tightly.

[0036] In other embodiments, the self-locking member and the annular reinforcement member 102 are not on the same plane, that is, the connection between the self-locking member and the annular reinforcement member 102 is bent. This arrangement causes the forces separating the self-locking member and the annular reinforcement member 102 to be directed in different directions, making the annular reinforcement member 102 and the top cover body 101 less likely to fall off. For example, the self-locking member is bent toward the bottom side of the annular reinforcement member 102.

[0037] In this embodiment, the annular reinforcement member 102 is made of metal to ensure the strength of the annular reinforcement member 102. In order to prevent the metal annular reinforcement member 102 from reflecting light, its surface can also be painted black.

[0038] Example 2

[0039] like Figure 5 As shown, the present invention also provides a variable aperture mechanism, comprising the aforementioned variable aperture cover 1. It also includes a light aperture assembly formed 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; and a base 12 that engages with the variable aperture cover 1. The light aperture assembly and the rotating member are disposed in a cavity formed by the variable aperture cover and the base 12; the rotating member 6 is driven to rotate by a brake 10.

[0040] Specifically, a ball bearing 9 is provided between the rotating member 6 and the base 12 , so that the rotating member 6 can rotate more smoothly.

[0041] The inner surface of the iris diaphragm cover 1 is provided with a relief groove 104 for accommodating the positioning posts of the base 12 and the guide posts of the rotating member 6. To facilitate positioning between the iris diaphragm cover 1 and the base 12, the cover body 101 is provided with a limiting boss 103 that cooperates with the iris diaphragm mechanism base 6.

[0042] In addition, the top and bottom surfaces of the light aperture assembly are respectively provided with an upper gasket 2 and a lower gasket 4. A clamping mechanism 5 is fixed to the rotating member 6 and is used to cooperate with a brake 10 to drive the rotating member 6 to rotate. A permanent magnet 7 fixed to the rotating member 6 and a steel sheet 11 fixed to the base 6 are mutually attracted to prevent the rotating member 6 from disengaging during rotation. The assembly also includes a Hall permanent magnet 8, which is mounted on the rotating member 6 to sense its rotation, and an FPC 13 (flexible printed circuit board) fixed to the base 12.

[0043] 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 top cover, characterized by: It comprises an annular top cover body and an annular reinforcement member embedded in the top cover body; the material strength of the annular reinforcement member is higher than the material strength of the top cover body.

2. The variable aperture top cover according to claim 1, characterized in that: The top cover body is provided with an annular limiting groove, and the annular reinforcement is fixed in the limiting groove; and the annular reinforcement is flush with the inner annular surface of the top cover body.

3. The variable aperture top cover according to claim 2, characterized in that: A plurality of sheet-like self-locking parts are radially arranged on the outer ring surface of the annular reinforcement, and self-locking holes are opened on the self-locking parts; the top cover body is injection molded, so that during injection molding, the injection molding material can be solidified in the self-locking holes.

4. The variable aperture top cover according to claim 3, characterized in that: The self-locking component comprises a base plate connected to the annular reinforcement component, the self-locking hole is opened on the base plate; and a reinforcement strip extending outward is arranged on the outer side of the base plate.

5. The variable aperture top cover according to claim 3, characterized in that: The self-locking member and the annular reinforcement member are not on the same plane.

6. The variable aperture top cover according to claim 5, characterized in that: The self-locking member is bent toward one side of the bottom of the annular reinforcement member.

7. The variable aperture top cover according to claim 1, characterized in that: The annular reinforcement is made of metal, and its surface is painted black.

8. The variable aperture top cover according to claim 1, characterized in that: The top cover body is provided with a limiting boss which cooperates with the base of the variable aperture mechanism.

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

10. The variable aperture mechanism according to claim 9, characterized in that: The device also includes a light hole assembly formed by a plurality of blades connected in a ring shape; the blades are connected to a rotating member so that the area of ​​the light hole can be changed when the rotating member rotates; the device also includes a base that is engaged with the variable aperture top cover, and the light hole assembly and the rotating member are arranged in a cavity formed by the variable aperture top cover and the base; the rotating member is driven to rotate by a brake.

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