Lens shading protection structure

Abstract

The utility model discloses a lens shading protection structure which comprises a connecting cylinder and a shading cylinder, the connecting cylinder is used for being connected with a lens, and the shading cylinder is connected to the outer side of the connecting cylinder; one side of the connecting cylinder is fixedly connected with a limiting ring, one side of the limiting ring is rotationally connected with a control screw rod, and one end of the control screw rod penetrates through the limiting ring and is fixedly connected with a gear; the outer side of the limiting ring is rotationally connected with an adjusting ring; the shading cylinder is movably arranged outside the connecting cylinder in a sleeving mode, a threaded hole is formed in the cylinder wall of the shading cylinder, and the control screw is in threaded connection in the threaded hole. Meshing teeth are arranged on the inner side of the adjusting ring, and the adjusting ring is meshed with the gear through the meshing teeth on the inner side. With the adoption of the structure, the position of the shading cylinder can be adjusted according to the field illumination intensity, so that proper illumination is kept to enter the lens, and the photographing effect can be effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses, and specifically relates to a lens light-shielding and protecting structure. Background Technique

[0002] A lens generally refers to a lens system, which is an optical element used to focus or disperse light and is commonly used in optical devices such as cameras, telescopes, and microscopes. A lens consists of one or more lenses. Through the refraction and reflection of the lenses, the propagation direction of light can be changed, light can be focused to produce a clear image, and the divergence and convergence of light can be controlled. The design and performance of the lens directly affect the imaging quality and function of the optical device. Different types of lenses have different characteristics and uses, such as wide-angle lenses, telephoto lenses, macro lenses, etc.

[0003] When taking pictures, a camera is easily interfered by light, and different lights will result in different shooting colors and qualities. Therefore, a structure capable of adjusting light is required. In the prior art, an aperture is generally provided on a lens, but relying solely on the aperture cannot meet the usage requirements, especially in an environment with strong light. Therefore, a lens hood is usually used in the prior art to assist in adjusting light. The lens hood in the prior art generally includes a fixed cylinder and a movable cylinder, and the movable cylinder is movably connected to the fixed cylinder, and the movable cylinder can be telescoped on the fixed cylinder. However, in the prior art, the position of the movable cylinder is fixed by a clamping method, resulting in inflexible adjustment of the movable cylinder.

[0004] In the patent with the publication number of CN111596501A, a plastic camera lens hood with a telescopic function is disclosed. It stably connects the whole by using a fixing screw and a fixing screw hole to engage with each other, ensuring stable engagement after the whole is adjusted, increasing the fixing effect of the whole, and facilitating the adjustment of the whole. However, this clamping method can only adjust a fixed length, so there is a problem of inflexible adjustment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a lens light-shielding and protecting structure to solve the following technical problems raised in the background technique:

[0006] In the prior art, the position of the movable cylinder is fixed by a clamping method, resulting in inflexible adjustment of the movable cylinder.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A lens light-shielding and protecting structure includes a connecting cylinder and a light-shielding cylinder. The connecting cylinder is used to connect with the lens, and the light-shielding cylinder is connected to the outside of the connecting cylinder;

[0009] One side of the connecting cylinder is fixedly connected with a limit ring. One side of the limit ring is rotatably connected with a control screw rod. One end of the control screw rod penetrates through the limit ring and is fixedly connected with a gear. The outer side of the limit ring is rotatably connected with an adjusting ring.

[0010] The light-shielding cylinder is movably sleeved outside the connecting cylinder. Threaded holes are provided on the cylinder wall of the light-shielding cylinder. The control screw rod is threadedly connected in the threaded holes. Meshing teeth are provided on the inner side of the adjusting ring. The adjusting ring is meshed with the gear through the meshing teeth on the inner side.

[0011] Further, a rotating groove is provided on the outer side of the limit ring. A connecting ring is provided on the inner side of the adjusting ring. The connecting ring is movably connected in the rotating groove. The adjusting ring is rotatably connected with the limit ring through the connecting ring.

[0012] Further, a plurality of anti-slip vertical stripes are provided on the outer side of the adjusting ring. The anti-slip vertical stripes are evenly spaced in the circumferential direction of the adjusting ring.

[0013] Further, a plurality of control screw rods are rotatably connected to the limit ring. The control screw rods are evenly spaced along the circumferential direction of the limit ring.

[0014] Further, four control screw rods are rotatably connected to the limit ring. The control screw rods are distributed at the four positions of the upper, lower, left, and right of the limit ring.

[0015] Further, a limit groove is provided on the outer side of the connecting cylinder. A limit block is fixedly connected to the inner side of the light-shielding cylinder. The limit block is slidably connected in the limit groove.

[0016] Further, clamping plates are provided on the inner side of the connecting cylinder. A telescopic device is provided between the clamping plates and the connecting cylinder. Two ends of the telescopic device are respectively fixedly connected with the connecting cylinder and the clamping plates.

[0017] Further, the telescopic device includes a fixed head, a telescopic rod, and a compression spring. Among them, the fixed head is a cylindrical structure. The fixed head is fixedly connected with the connecting cylinder. One side of the telescopic rod is fixedly connected with the clamping plate, and the other side is movably connected in the fixed head. The compression spring is arranged in the fixed head. One end of the compression spring is connected with the fixed head, and the other end is connected with the telescopic rod.

[0018] Further, four clamping plates are provided. A telescopic device is provided between each clamping plate and the connecting cylinder. The four clamping plates are in contact with each other initially and form a cylindrical structure.

[0019] Further, a contact part is fixedly connected to one side of the clamping plate. The contact part is a structure that is inclined outward.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] When the utility model is in use, first fix the connecting cylinder on the lens. The light-shielding effect is achieved through the connecting cylinder and the light-shielding cylinder. When it is necessary to increase the light-shielding effect, rotate the adjusting ring. The adjusting ring drives the gear to rotate through the meshing teeth inside, and the gear drives the control screw to rotate, so that the light-shielding cylinder moves on the connecting cylinder. By controlling the rotation direction of the adjusting ring, the telescopic movement of the light-shielding cylinder on the connecting cylinder can be controlled, so as to achieve flexible adjustment. With this structure of the utility model, the position of the light-shielding cylinder can be adjusted according to the light intensity on site, so as to keep appropriate light entering the lens, and the photographing effect can be effectively guaranteed. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3 It is a schematic diagram of the overall structure of the utility model after the light-shielding cylinder extends out.

[0025] Reference numerals in the drawings: 1 - connecting cylinder, 2 - limiting ring, 3 - adjusting ring, 4 - light-shielding cylinder, 5 - control screw, 6 - clamping plate, 7 - contact part, 8 - gear, 9 - rotating groove, 10 - connecting ring, 11 - fixed head, 12 - compression spring, 13 - telescopic rod, 14 - limiting groove, 15 - limiting block. Detailed Description of the Embodiment

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment

[0028] A lens light-shielding and protecting structure, as Figure 1 shown, includes a connecting cylinder 1 and a light-shielding cylinder 4. The connecting cylinder 1 is used to connect with the lens, and the light-shielding cylinder 4 is connected to the outside of the connecting cylinder 1. Among them, the connecting cylinder 1 cooperates with the lens, and the connecting cylinder 1 can be connected to the lens, which can be realized by means of snap connection, threaded connection, screw connection, etc.

[0029] As Figure 2 shown, a limiting ring 2 is fixedly connected to one side of the connecting cylinder 1, a control screw 5 is rotatably connected to one side of the limiting ring 2, and one end of the control screw 5 penetrates through the limiting ring 2 and is fixedly connected with a gear 8; an adjusting ring 3 is rotatably connected to the outside of the limiting ring 2.

[0030] The light-shielding cylinder 4 is movably sleeved outside the connecting cylinder 1. Threaded holes are provided on the cylinder wall of the light-shielding cylinder 4, and the control screw 5 is threadedly connected in the threaded holes. Meshing teeth are provided on the inner side of the adjusting ring 3, and the adjusting ring 3 is meshed with the gear 8 through the meshing teeth on the inner side.

[0031] Specifically, during use, first fix the connecting cylinder 1 on the lens. The light-shielding effect is achieved through the connecting cylinder 1 and the light-shielding cylinder 4. When it is necessary to increase the light-shielding effect, rotate the adjusting ring 3. The adjusting ring 3 drives the gear 8 to rotate through the internal meshing teeth, and the gear 8 drives the control screw 5 to rotate. Since one side of the control screw 5 is threadedly connected in the threaded hole of the light-shielding cylinder 4, when the control screw 5 rotates, the light-shielding cylinder 4 can move on the connecting cylinder 1, as Figure 3 shown. By controlling the rotation direction of the adjusting ring 3, the telescoping of the light-shielding cylinder 4 on the connecting cylinder 1 can be controlled, so as to achieve flexible adjustment. With this structure of the present utility model, the position of the light-shielding cylinder 4 can be adjusted according to the on-site light intensity, so as to keep appropriate light entering the lens, and the photographing effect can be effectively guaranteed.

[0032] In a preferred embodiment, as Figure 2 shown, a rotating groove 9 is provided on the outer side of the limiting ring 2, and a connecting ring 10 is provided on the inner side of the adjusting ring 3. The connecting ring 10 is movably connected in the rotating groove 9; the adjusting ring 3 is rotationally connected to the limiting ring 2 through the connecting ring 10. The connecting ring 10 is rotationally connected to the limiting ring 2 through the rotating groove 9, ensuring the stable connection between the adjusting ring 3 and the limiting ring 2. This design can make the adjusting ring 3 rotate more smoothly, improving the convenience and stability of operation. With this structure, adjusting the position of the light-shielding cylinder 4 becomes more stable and convenient, and users can adjust the light-shield more precisely to adapt to different light conditions and shooting requirements.

[0033] In a preferred embodiment, as Figure 1 shown, a number of anti-slip vertical stripes are provided on the outer side of the adjusting ring 3, and the anti-slip vertical stripes are evenly spaced in the circumferential direction of the adjusting ring 3. This design can improve the feel and operability of the adjusting ring 3, increasing the holding force and stability of the user when rotating the adjusting ring 3. The setting of the anti-slip vertical stripes can effectively reduce the risk of accidental slipping or dropping, ensuring that users can easily and accurately adjust during use.

[0034] In a preferred embodiment, as Figure 3As shown, several control screws 5 are rotatably connected to the limit ring 2, and the control screws 5 are evenly spaced along the circumferential direction of the limit ring 2. This design can provide more stable control when adjusting the position of the light-shielding cylinder 4, enabling the user to more precisely adjust the position of the light-shielding cylinder 4 by rotating the control screw 5. The evenly spaced arrangement of the control screws 5 helps the user accurately grasp the distance and force of each rotation, improving the controllability of the adjustment. At the same time, by setting several control screws 5, the smooth movement of the light-shielding cylinder 4 can be ensured, enhancing the user's control over the light-shielding cylinder 4.

[0035] In a preferred embodiment, four control screws 5 are rotatably connected to the limit ring 2, and the control screws 5 are distributed at the upper, lower, left, and right positions of the limit ring 2. The stability of the light-shielding cylinder 4 can be ensured by precisely controlling the positions of the control screws 5. Setting four control screws 5 is the optimal solution obtained through optimization after actual use. By arranging the control screws 5 at the upper, lower, left, and right positions, all four control screws 5 can provide axial component forces to the light-shielding cylinder 4, making the movement of the light-shielding cylinder 4 smoother and facilitating the user's operation.

[0036] In a preferred embodiment, as Figure 3 shown, a limit groove 14 is provided on the outer side of the connecting cylinder 1, and a limit block 15 is fixedly connected to the inner side of the light-shielding cylinder 4. The limit block 15 is slidably connected in the limit groove 14. The limit groove 14 is used to limit the sliding distance of the limit block 15, thereby restricting the movement distance of the light-shielding cylinder 4. Through the design of the limit groove 14 and the limit block 15, it can be ensured that the light-shielding cylinder 4 will not exceed the set movement range during the adjustment process, preventing the occurrence of inaccurate light adjustment caused by excessive or insufficient movement. This design effectively improves the adjustment stability of the light-shielding cylinder 4, enabling the user to more conveniently control the entry of light according to actual needs, further enhancing the shooting effect and imaging quality.

[0037] In a preferred embodiment, as Figure 1 shown, a clamping plate 6 is provided on the inner side of the connecting cylinder 1, and a telescopic device is provided between the clamping plate 6 and the connecting cylinder 1. Both ends of the telescopic device are fixedly connected to the connecting cylinder 1 and the clamping plate 6 respectively. The telescopic device is used to adjust the distance between the clamping plates 6. The purpose of adjusting the clamping plate 6 is to enable the connecting cylinder 1 to adapt to various different lenses, ensuring that the connecting cylinder 1 can be stably connected to lenses of different specifications. The design of this structure makes the lens light-shielding and protection structure have a wider applicability, while enhancing the flexibility and stability of the system. During use, it can more conveniently adapt to different types of lenses, ensuring its effective protection of the lens and improvement of the shooting quality.

[0038] In a preferred embodiment, as Figure 2As shown, the telescopic device includes a fixed head 11, a telescopic rod 13, and a compression spring 12. Among them, the fixed head 11 is a cylindrical structure, and the fixed head 11 is fixedly connected to the connecting cylinder 1. One side of the telescopic rod 13 is fixedly connected to the clamping plate 6, and the other side is movably connected within the fixed head 11. The compression spring 12 is arranged within the fixed head 11. One end of the compression spring 12 is connected to the fixed head 11, and the other end is connected to the telescopic rod 13. Through the action of the compression spring 12, an appropriate elastic force can be provided to ensure a stable connection between the connecting components and adjust the distance between the clamping plates 6 to adapt to the specifications and sizes of different lenses. Such a structural design makes the entire lens light-shielding protection device have better adaptability and stability.

[0039] In a preferred embodiment, as Figure 3 shown, there are four clamping plates 6, and a telescopic device is provided between each clamping plate 6 and the connecting cylinder 1. The four clamping plates 6 are in contact with each other initially and form a cylindrical structure. Through the adjustment of their respective telescopic devices, the relative positions of the clamping plates 6 can be changed, thereby adapting to lenses of different sizes, shapes, and specifications. This design structure enables the connecting cylinder 1 to flexibly adapt to various lens shapes, ensuring a stable connection and providing effective light shielding protection, so that the lens is optimally protected during shooting, while improving the shooting quality and usability.

[0040] In a preferred embodiment, as Figure 3 shown, a contact portion 7 is fixedly connected to one side of the clamping plate 6. The contact is an outwardly inclined structure, and the outwardly inclined structure is used to facilitate clamping the clamping plate 6 outside the lens barrel. Through such a design, users can more easily and quickly install the lens light-shielding protection device on the lens, improving the convenience of user operation.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front part", "center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A lens light-shielding and protective structure, characterized in that: It includes a connecting cylinder (1) and a light-shielding cylinder (4). The connecting cylinder (1) is used to connect with a lens, and the light-shielding cylinder (4) is connected to the outside of the connecting cylinder (1). A limiting ring (2) is fixedly connected to one side of the connecting cylinder (1). A control screw rod (5) is rotatably connected to one side of the limiting ring (2). One end of the control screw rod (5) penetrates through the limiting ring (2) and is fixedly connected with a gear (8). An adjusting ring (3) is rotatably connected to the outside of the limiting ring (2). The light-shielding cylinder (4) is movably sleeved outside the connecting cylinder (1). Threaded holes are provided on the cylinder wall of the light-shielding cylinder (4), and the control screw rod (5) is threadedly connected in the threaded holes. Meshing teeth are provided on the inner side of the adjusting ring (3), and the adjusting ring (3) meshes with the gear (8) through the meshing teeth on the inner side.

2. The lens light-shielding and protection structure according to claim 1, characterized in that: A rotating groove (9) is provided on the outside of the limiting ring (2). A connecting ring (10) is provided on the inner side of the adjusting ring (3), and the connecting ring (10) is movably connected in the rotating groove (9). The adjusting ring (3) is rotatably connected to the limiting ring (2) through the connecting ring (10).

3. The lens light-shielding and protection structure according to claim 1, wherein: A number of anti-slip vertical stripes are provided on the outside of the adjusting ring (3), and the anti-slip vertical stripes are evenly spaced in the circumferential direction of the adjusting ring (3).

4. A lens light-shielding and protection structure according to claim 1, characterized in that: A number of control screw rods (5) are rotatably connected to the limiting ring (2), and the control screw rods (5) are evenly spaced along the circumferential direction of the limiting ring (2).

5. The lens light-shielding and protection structure according to claim 4, wherein: Four control screw rods (5) are rotatably connected to the limiting ring (2), and the control screw rods (5) are distributed at the upper, lower, left, and right four positions of the limiting ring (2).

6. A lens light-shielding protection structure according to claim 1, characterized in that: A limiting groove (14) is provided on the outside of the connecting cylinder (1). A limiting block (15) is fixedly connected to the inside of the light-shielding cylinder (4), and the limiting block (15) is slidably connected in the limiting groove (14).

7. A lens light-shielding and protection structure according to claim 1, characterized in that: A clamping plate (6) is provided on the inside of the connecting cylinder (1). A telescopic device is provided between the clamping plate (6) and the connecting cylinder (1), and both ends of the telescopic device are fixedly connected to the connecting cylinder (1) and the clamping plate (6) respectively.

8. A lens light-shielding and protective structure according to claim 7, characterized in that: The telescopic device includes a fixed head (11), a telescopic rod (13), and a compression spring (12). Among them, the fixed head (11) is of a cylindrical structure, and the fixed head (11) is fixedly connected to the connecting cylinder (1). One side of the telescopic rod (13) is fixedly connected to the clamping plate (6), and the other side is movably connected inside the fixed head (11). The compression spring (12) is arranged inside the fixed head (11), one end of the compression spring (12) is connected to the fixed head (11), and the other end is connected to the telescopic rod (13).

9. The lens light-shielding and protection structure according to claim 8, wherein: Four clamping plates (6) are provided, and a telescopic device is provided between each clamping plate (6) and the connecting cylinder (1). The four clamping plates (6) are in contact with each other initially and form a cylindrical structure.

10. A lens light-shielding and protective structure according to claim 9, wherein: A contact part (7) is fixedly connected to one side of the clamping plate (6), and the contact is of a structure inclined outward.

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