Variable aperture and its blade assembly

Abstract

The application belongs to the technical field of variable aperture, and particularly relates to a blade assembly of a variable aperture, which comprises a plurality of annularly distributed blades, and a light aperture hole is surrounded by the blades. The size of the light aperture hole can be adjusted by rotating the blades. The blades are made of metal, and each blade comprises a blade body, a circular through hole and a groove-shaped through hole arranged on the blade body, and a plurality of micro convex points are formed on the blade body. The height of the circular through hole and the height of the groove-shaped through hole are both greater than the thickness of the blade body. An arc-shaped chamfer is formed on the side edge of the blade body for forming the light aperture hole. Compared with the prior art, the blades in the application are made of metal, so that the strength of the blades can be ensured. The micro convex points can change the surface contact into point contact, so that the contact area between adjacent blades can be reduced, the sliding property of the blades can be improved, and the service life of the variable aperture can be ensured due to the small contact area and the invisible worn coating.

Description

Technical Field

[0001] This invention belongs to the field of variable aperture technology, and particularly relates to a variable aperture and its blade assembly. Background Technology

[0002] Currently, smartphones, tablets, and other electronic devices have become indispensable in people's lives. With the continuous development of the electronic device industry, the functions of electronic devices are gradually becoming more diversified and intelligent, among which the camera function has become one of the essential features.

[0003] To meet the imaging requirements of different depths of field and image brightness, current electronic devices typically incorporate a variable aperture structure at the front of the lens in their camera modules. By changing the size of the aperture opening, the intensity of incident light can be adjusted, thereby significantly improving the image quality of the camera module.

[0004] like Figures 1 to 3 As shown, the variable aperture structure in the prior art generally includes a fixed ring seat 10, a movable ring seat 20, a blade assembly 30, and a top cover 40. The fixed ring seat 10 is provided with a first positioning post 101; the movable ring seat 20 is provided with a second positioning post 201; the blade assembly 30 includes multiple blades, each blade having a circular through hole 301 and a slotted through hole 302; the top cover 40 is provided with a first blind hole 401 and a second blind hole 402; the end of the first positioning post 101 passes through the circular through hole 301 and enters the first blind hole 401, and the end of the second positioning post 201 passes through the slotted through hole 302 and enters the second blind hole 402. A magnet 50 and a coil 60 are disposed between the fixed ring seat 10 and the movable ring seat 20.

[0005] However, in existing technology, the blades are made of plastic, and the surface of the blades needs to be coated with a black layer. This material is not strong enough, and the blades are prone to sagging or curling at the edges. Sagging may scratch the lens, while curling will prevent the entire variable aperture blade from operating properly. Moreover, it is difficult to make the chamfers rounded. Therefore, the blade material needs to be changed to metal. In addition, since a variable aperture generally consists of several blades arranged in a ring, these blades together surround the aperture opening. Because there is overlap between adjacent blades, and the blades in the existing technology are in surface contact, the friction is relatively large, which easily wears off the black coating, causing the blades to turn white and affecting the visual effect of the variable aperture. Moreover, metal blades are prone to damaging the first and second positioning posts (cut posts) during operation, greatly reducing the lifespan of the variable aperture structure.

[0006] In view of this, the present invention aims to provide a variable aperture and its blade assembly. This blade assembly, through ingenious structural design, changes surface contact to point contact when using metal blades, thereby reducing the contact area between adjacent blades, increasing blade sliding performance, and ensuring the service life of the variable aperture due to the smaller contact area, making any wear on the coating invisible to the naked eye and not affecting the visual appearance. Furthermore, its edges can be chamfered to reduce stray light. In addition, the increased circular and slotted through-holes further increase the contact area between the metal blades and the positioning post, preventing "post cutting" and ensuring the service life of the variable aperture. Summary of the Invention

[0007] One objective of this invention is to address the shortcomings of existing technologies by providing a variable aperture blade. Through ingenious structural design, using metal blades, surface contact is changed to point contact, thereby reducing the contact area between adjacent blades, increasing blade sliding smoothness, and ensuring the service life of the variable aperture by preventing wear and tear on the coating. Furthermore, the edges can be chamfered to reduce stray light. In addition, the increased height of the circular and slotted through-holes further increases the contact area between the metal blades and the positioning posts, preventing "post cutting" and ensuring the service life of the variable aperture.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A variable aperture blade assembly includes several blades arranged in a ring to form an aperture. The size of the aperture can be adjusted by rotating the blades. The blades are made of metal and include a blade body and a circular through-hole and a slotted through-hole disposed on the blade body. Several micro-protrusions are formed on the blade body. The height of the circular through-hole and the height of the slotted through-hole are both greater than the thickness of the blade body. An arc-shaped chamfer is formed on the edge of the blade body that forms the aperture.

[0010] As an improvement to the variable aperture blade of the present invention, the diameter of the upper surface of the micro-bump is less than 0.08 mm; the height of the micro-bump is greater than 0.002 mm.

[0011] As an improvement to the variable aperture blade of the present invention, the micro-bumps are uniformly distributed on the blade body.

[0012] As an improvement to the variable aperture blade of the present invention, the upper surface of the micro-bump is a plane, and the side surface of the micro-bump is an arc-shaped surface that gradually increases from top to bottom.

[0013] As an improvement to the blade of the variable aperture of the present invention, the upper surface of the blade is coated with a black coating with a reflectivity of less than 0.1%; in the Lab value of the black coating, L is less than or equal to 0.5, a ranges from -0.5 to 0.5, and b ranges from -0.5 to 0.5.

[0014] As an improvement to the variable aperture blade of the present invention, one end of the circular through hole protrudes above the upper surface of the blade body, and one end of the groove-shaped through hole protrudes above the upper surface of the blade body.

[0015] As an improvement to the variable aperture blade of the present invention, the ratio of the wall thickness of the portion of the circular through hole protruding above the blade body to the diameter of the circular through hole is 1 / 10-1 / 3; the ratio of the wall thickness of the portion of the slotted through hole protruding above the blade body to the diameter of the circular through hole is 1 / 10-1 / 3.

[0016] As an improvement to the variable aperture blade of the present invention, the ratio of the height of the portion of the circular through hole protruding above the blade body to the thickness of the blade body is 0.5-3; the ratio of the height of the portion of the groove-shaped through hole protruding above the blade body to the thickness of the blade body is 0.5-3.

[0017] Another object of the present invention is to provide a variable aperture, including a top cover, a fixed ring seat, a movable ring seat, and the blade assembly described in the present invention. The fixed ring seat is provided with a first positioning post, the movable ring seat is provided with a second positioning post, the top cover is provided with a first blind hole and a second blind hole, the end of the second positioning post passes through the circular through hole and is embedded in the first blind hole, the end of the first positioning post passes through the slotted through hole and is embedded in the second blind hole, the movable ring seat rotates together with the second positioning post, and thereby rotates the blade along the slotted through hole.

[0018] As an improvement to the variable aperture of the present invention, a coil and a magnet are provided between the movable ring seat and the fixed ring seat.

[0019] As an improvement to the variable aperture of the present invention, the movable ring seat is disposed outside the fixed ring seat.

[0020] As an improvement to the variable aperture of the present invention, the fixed ring seat is disposed outside the movable ring seat.

[0021] Compared to existing technologies, the blades in this invention are made of metal, thus ensuring their strength and preventing them from warping or sagging, protecting the lens from scratches, and ensuring the normal operation of the entire variable aperture blade system. Simultaneously, their edges can be formed with a rounded chamfer to reduce stray light, and the micro-protrusions change surface contact to point contact, thereby reducing the contact area between adjacent blades, increasing blade sliding smoothness. Furthermore, the smaller contact area means that any wear on the coating is invisible to the naked eye, not affecting the visual appearance and ensuring the lifespan of the variable aperture. In addition, the raised circular and slotted through-holes increase the contact area between the metal blades and the positioning posts, preventing "post cutting" and further ensuring the lifespan of the variable aperture. Attached Figure Description

[0022] Figure 1 This is one of the exploded structural diagrams of a variable aperture structure in the prior art.

[0023] Figure 2 This is one of the exploded structural diagrams of a variable aperture structure in the prior art.

[0024] Figure 3 This is a schematic diagram of the blade structure in a variable aperture structure in the prior art.

[0025] Figure 4 This is one of the three-dimensional structural diagrams of the blade in Embodiment 1 of the present invention.

[0026] Figure 5 This is the second three-dimensional structural schematic diagram of the blade in Embodiment 1 of the present invention.

[0027] Figure 6 This is a top view of the blade in Embodiment 2 of the present invention.

[0028] Figure 7 This is a bottom view of the blade in Embodiment 2 of the present invention.

[0029] Figure 8 This is a three-dimensional structural diagram of Embodiment 3 of the present invention.

[0030] Figure 9 This is a three-dimensional structural diagram of Embodiment 4 of the present invention.

[0031] Figure 10 This is a three-dimensional structural diagram of Embodiment 5 of the present invention.

[0032] Figure 11 This is one of the exploded structural diagrams of Embodiment 5 of the present invention.

[0033] Figure 12 This is the second exploded structural diagram of Embodiment 5 of the present invention.

[0034] Figure 13 This is the third exploded structural diagram of Embodiment 5 of the present invention.

[0035] Figure 14 This is an exploded structural diagram of Embodiment 6 of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0039] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] Example 1

[0041] like Figure 4 and Figure 5 As shown, this embodiment provides a variable aperture blade. The blade is made of metal and includes a blade body 1 and a circular through hole 2 and a grooved through hole 3 disposed on the blade body 1. A plurality of micro-bumps 11 are formed on the blade body. The micro-bumps 11 can change surface contact to point contact, thereby reducing the contact area between adjacent blades, increasing the sliding performance of the blade, and at the same time, the contact area is small, so the worn coating is not visible to the naked eye, thus not affecting the visual appearance and ensuring the service life of the variable aperture.

[0042] The diameter of the upper surface of the micro-bump 11 is less than 0.08 mm (existing in a form invisible to the naked eye); the height of the micro-bump 11 is greater than 0.002 mm. The micro-bumps 11 are evenly distributed on the blade body 1.

[0043] The upper surface of the micro-bump 11 is a plane, and the side surface of the micro-bump is an arc-shaped surface that gradually increases from top to bottom.

[0044] The upper surface of blade 1 is coated with a black coating with a reflectivity of less than 0.1%. In the Lab value of the black coating, L is less than or equal to 0.5, a ranges from -0.5 to 0.5, and b ranges from -0.5 to 0.5.

[0045] The heights of both the circular through-hole 2 and the slotted through-hole 3 are greater than the thickness of the blade body 1. In terms of position, the circular through-hole 2 can be closer to the outer edge of the blade body 1 than the slotted through-hole 3, or the slotted through-hole 3 can be closer to the outer edge of the blade body 1 than the circular through-hole 2. Therefore, the positional relationship between the two is not limited, as long as it allows the blade body 1 to rotate along the trajectory of the slotted through-hole 3.

[0046] One end of the circular through hole 2 protrudes above the upper surface of the blade body 1, and the other end is flush with the lower surface of the blade body 1. One end of the groove-shaped through hole 3 protrudes above the upper surface of the blade body 1, and the other end is flush with the lower surface of the blade body 1.

[0047] The ratio of the wall thickness of the portion of the circular through hole 2 protruding above the blade body 1 to the diameter of the circular through hole 2 is 1 / 10-1 / 3 (for example, it can be 1 / 6); the ratio of the wall thickness of the portion of the slotted through hole 3 protruding above the blade body 1 to the diameter of the circular through hole 2 is 1 / 10-1 / 3 (for example, it can be 1 / 6).

[0048] The ratio of the height of the portion of the circular through hole 2 protruding above the blade body 1 to the thickness of the blade body 1 is 0.5-3 (for example, it can be 1); the ratio of the height of the portion of the slotted through hole 3 protruding above the blade body 1 to the thickness of the blade body 1 is 0.5-3 (for example, it can be 1).

[0049] An arc-shaped chamfer 11 is formed on one side edge of the blade body 1 used to form the aperture to reduce stray light.

[0050] In this embodiment, since the blade is made of metal, its strength can be guaranteed and the problem of it warping or sagging can be prevented. At the same time, the edge can also form an arc-shaped chamfer 11 to reduce stray light. The setting of the raised circular through hole 2 and the slotted through hole 3 increases the contact area between the metal blade and the positioning post, preventing the "cutting the post" phenomenon and ensuring the service life of the variable aperture.

[0051] Example 2

[0052] like Figure 6-7 As shown, unlike Embodiment 1, the height of the circular through hole 2 and the height of the grooved through hole 3 are both equal to the thickness of the blade body 1. The rest are the same as in Embodiment 1, and will not be repeated here.

[0053] Example 3

[0054] like Figure 8 As shown, this embodiment provides a variable aperture blade assembly, including several blades 100 as in Embodiment 1. The several blades 100 are arranged in a ring and together surround the aperture 200. The size of the aperture 200 can be adjusted by rotating the blades 100.

[0055] Example 4

[0056] like Figure 9 As shown, this embodiment provides a variable aperture blade assembly, including several blades 10 as in Embodiment 2. The several blades 10 are arranged in a ring and together surround the aperture 20. The size of the aperture 20 can be adjusted by rotating the blades 10.

[0057] Example 5

[0058] like Figures 10 to 13 As shown, this embodiment provides a variable aperture, including a fixed ring seat 4, a movable ring seat 5, an upper cover 6, and the blade assembly from embodiment 3. The fixed ring seat 4 is provided with a first positioning post 41, the movable ring seat 5 is provided with a second positioning post 51, and the upper cover 6 is provided with a first blind hole 61 and a second blind hole 62. The end of the second positioning post 51 passes through a circular through hole 2 and is embedded in the first blind hole 61, while the end of the first positioning post 41 passes through a slotted through hole 3 and is embedded in the second blind hole 62. The movable ring seat 5 rotates together with the second positioning post 51, thereby causing the blade 10 to rotate along the trajectory of the slotted through hole 3. A coil 7 and a magnet 8 are provided between the fixed ring seat 4 and the movable ring seat 5, which can drive the rotation of the movable ring seat 5. When coil 7 is energized, magnet 8 rotates clockwise (or counterclockwise) with movable ring seat 5. The second positioning post 51 on movable ring seat 5 rotates together with blade body 1. Since slotted through hole 3 limits the rotation angle and rotation range of blade body 1, each blade body 1 rotates inward together, causing the aperture 20 to gradually become smaller until it is completely closed. When coil 7 is energized, magnet 8 rotates counterclockwise (or clockwise) with movable ring seat 5. The second positioning post 51 on movable ring seat 5 rotates together with blade body 1. Since slotted through hole 3 limits the rotation angle and rotation range of blade body 1, each blade body 1 rotates outward together, causing the aperture 20 to gradually become larger until it is completely open, forming a hexagon that is infinitely close to a circle.

[0059] It should be noted that when the circular through hole 2 is closer to the outer edge of the blade body 1 than the slotted through hole 3, the movable ring seat 5 is located outside the fixed ring seat 4. Conversely, when the slotted through hole 3 is closer to the outer edge of the blade body 1 than the circular through hole 2, the fixed ring seat 4 is located outside the movable ring seat 5.

[0060] In this embodiment, the movable ring seat 5 is located outside the fixed ring seat 4. Several magnets 8 are embedded in the embeddable structure formed on the inner wall of the movable ring seat 5, so that the movement of the magnets 8 can move the movable ring seat 5 together.

[0061] Of course, the inner and outer order of the fixed ring seat 4 and the movable ring seat 5 can also be changed to achieve the same effect.

[0062] Example 6

[0063] like Figure 14 As shown, the blade assembly differs from that in Example 5 from that in Example 4. The rest is the same as in Example 5, and will not be described again here.

[0064] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A variable aperture blade assembly, comprising a plurality of blades arranged in a ring and collectively surrounding an aperture, wherein the size of the aperture can be adjusted by rotating the blades, characterized in that: The blade is made of metal, and the blade includes a blade body and a circular through hole and a grooved through hole disposed on the blade body. A plurality of micro-protrusions are formed on the blade body. The height of the circular through hole and the height of the grooved through hole are both greater than the thickness of the blade body. An arc-shaped chamfer is formed on the edge of the blade body used to form the aperture hole. The diameter of the upper surface of the micro-bump is less than 0.08 mm; the height of the micro-bump is greater than 0.002 mm; the micro-bump is evenly distributed on the blade body; the upper surface of the micro-bump is a plane, and the side surface of the micro-bump is an arc-shaped surface that gradually increases from top to bottom.

2. The variable aperture blade assembly according to claim 1, characterized in that: The upper surface of the blade is coated with a black coating with a reflectivity of less than 0.1%; in the Lab value of the black coating, L is less than or equal to 0.5, a ranges from -0.5 to 0.5, and b ranges from -0.5 to 0.

5.

3. The variable aperture blade assembly according to claim 1, characterized in that: One end of the circular through hole protrudes above the upper surface of the blade body, and one end of the groove-shaped through hole protrudes above the upper surface of the blade body.

4. The variable aperture blade assembly according to claim 3, characterized in that: The ratio of the wall thickness of the portion of the circular through-hole protruding above the blade body to the diameter of the circular through-hole is 1 / 10 to 1 / 3; the ratio of the wall thickness of the portion of the slotted through-hole protruding above the blade body to the diameter of the circular through-hole is 1 / 10 to 1 / 3.

5. The variable aperture blade assembly according to claim 3, characterized in that: The ratio of the height of the portion of the circular through hole protruding above the blade body to the thickness of the blade body is 0.5-3; the ratio of the height of the portion of the groove-shaped through hole protruding above the blade body to the thickness of the blade body is 0.5-3.

6. A variable aperture, characterized in that: The device includes a top cover, a fixed ring seat, a movable ring seat, and a blade assembly as described in any one of claims 1-5. The fixed ring seat is provided with a first positioning post, the movable ring seat is provided with a second positioning post, the top cover is provided with a first blind hole and a second blind hole, the end of the second positioning post passes through the circular through hole and is embedded in the first blind hole, the end of the first positioning post passes through the slotted through hole and is embedded in the second blind hole, the movable ring seat rotates together with the second positioning post, and thus rotates the blade along the slotted through hole.

7. The variable aperture according to claim 6, characterized in that: A coil and a magnet are provided between the movable ring seat and the fixed ring seat.

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