Small-caliber long lens barrel structure

Abstract

The utility model discloses a small caliber long mirror barrel structure, including left half mirror and setting right half mirror at its right side, the left half mirror with first thread groove is arranged to the right half mirror inner end surface, the right half mirror inside slidingly connected has zoom lens, the right half mirror right side surface has set up graduation mark, still include: folding mechanism: the folding mechanism includes the first connecting ring of screw connection in the left half mirror rear end, the second connecting ring is rotatably connected with the first connecting ring right side, the first connecting ring with first thread line is seted up to the second connecting ring outside, the first connecting ring top is provided with the clamping block, the second connecting ring top is provided with the clamping groove, the clamping block top is connected with screw threadedly, the utility model discloses small caliber long mirror barrel structure has the effect that folding storage, reduces the length of storage and placement space.

Description

Technical Field

[0001] This utility model relates to the field of camera lens barrel technology, and in particular to a small-diameter long lens barrel structure. Background Technology

[0002] The camera lens is the most important component of a camera. It consists of a complex lens group composed of multiple lens elements. It focuses light by refraction and directly affects the quality of the image. Based on focal length, lenses can be divided into three types: wide-angle, medium telephoto, and telephoto lenses. Small-diameter long lens barrels belong to the category of telephoto lenses. Due to their longer focal length, they are suitable for long-distance shooting in well-lit outdoor environments, such as for wildlife, birds, sports events, and landscapes.

[0003] However, the existing small-diameter long lens barrel structure is often too long, which has obvious drawbacks when storing it. Its extra-long size places extremely strict requirements on the size of the camera bag. Ordinary everyday backpacks simply cannot accommodate it. Even when using a dedicated camera bag, the excessively long lens body will seriously encroach on the storage space of other equipment, greatly limiting the flexibility of equipment when shooting outdoors.

[0004] For example, the storage problem of such extra-long lens barrels is particularly prominent for photographers who need to change lenses frequently. Not only does it occupy an entire vertical space in the camera bag, forcing other lenses and the camera body to be squeezed into the narrow corners on both sides, but it also causes trouble when switching equipment in actual use. Every time you take out or put back the long lens from the bag, you have to carefully move all the surrounding equipment away, for fear of scratching the lens barrel or knocking over the equipment. Outdoor shooting, which is originally aimed at efficiency, becomes cumbersome due to the inconvenience of storage, and may even cause people to give up carrying it because they are afraid of the trouble, thus missing the key shooting opportunity. Utility Model Content

[0005] This utility model discloses a small-diameter long lens barrel structure, which aims to solve the problem that existing small-diameter long lens barrel structures are often too long, which has obvious drawbacks when storing them. Their extra-long size places extremely strict requirements on the size of camera bags, and ordinary everyday backpacks simply cannot accommodate them. Even when using a dedicated camera bag, the excessively long lens body will seriously encroach on the storage space of other equipment, greatly limiting the flexibility of equipment for shooting outdoors.

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

[0007] A small-diameter long lens barrel structure includes a left half-mirror and a right half-mirror disposed on its right side. The inner surfaces of the left and right half-mirrors are provided with first threaded grooves. A zoom lens is slidably connected inside the right half-mirror. The right side surface of the right half-mirror has graduation marks. The structure also includes: a folding mechanism: the folding mechanism includes a first connecting ring threadedly connected to the rear end of the left half-mirror, a second connecting ring rotatably connected to the right side of the first connecting ring, a first threaded line on the outer side of the first and second connecting rings, a locking block at the top of the first connecting ring, a locking groove at the top of the second connecting ring, and a screw threadedly connected to the top of the locking block; and a zoom mechanism: the zoom mechanism is fixedly connected to the right side of the right half-mirror.

[0008] By adopting the above technical solution, the problems of portability and storage of traditional small-diameter long lens barrels are solved. The connection between the left and right half of the lens is equipped with a folding mechanism consisting of a first connecting ring, a second connecting ring, and a precision hinge. When storage is required, the user only needs to loosen the screw to release the mechanical lock of the locking block and slot, and the lens barrel can be rotated and folded at a large angle along the hinge axis, reducing the total length of the optical lens by about %, fundamentally changing the spatial form of the lens barrel. At the same time, while ensuring portability, the performance stability of professional optical components is maintained. Through the precise cooperation of the first thread and the first thread groove, and the double protection of the locking block and slot mechanism, the lens can restore the rigidity and optical path accuracy of the integrated lens barrel when it is unfolded and working.

[0009] As a further embodiment of this utility model: the zoom mechanism includes a zoom ring rotatably connected to the right side of the right half mirror, a cleaning brush fixedly connected to the right side of the zoom ring, a second threaded line opened on the inner side of the zoom ring, a slide rail provided on the left side of the second threaded line, and a second threaded groove provided on the right side of the second threaded line.

[0010] By adopting the above technical solution, the zoom function is integrated with the self-cleaning system, solving the long-standing problems of dust ingress and precision control in telephoto lenses. The soft-bristled cleaning brush integrated inside the zoom ring can simultaneously rotate and clean the second threaded groove on the outer wall of the zoom lens barrel when adjusting the focal length, preventing dust from accumulating in the thread gaps and being brought into the lens barrel, thus improving the lens's dustproof performance. At the same time, a precision control scheme combining threaded drive and slide rail guidance is adopted. The precise engagement of the second thread line and the second threaded groove provides smooth linear transmission, and the cooperation of the slide rail and the slide groove eliminates radial wobble of the lens barrel. This ensures both a smooth feel for zoom operation and accurate positioning and stable posture when the zoom lens moves, achieving excellent dustproof effect and reliable operation precision in complex shooting environments.

[0011] In summary, this application includes at least one of the following beneficial technical effects:

[0012] 1. It greatly improves the convenience of carrying and storing. The innovative hinge connection and locking structure realizes the foldable function of the lens barrel, which reduces the total length of the optical lens by about half. The precision thread fit and double locking guarantee ensure that the lens has the same rigidity and optical accuracy as the one-piece lens barrel when unfolded.

[0013] 2. Significantly improves lens dust resistance. By setting a synchronously rotating soft brush on the zoom ring, dust is effectively prevented from accumulating in the threaded groove and invading the lens barrel. Combined with the threaded drive and slide rail guide system, radial wobble during zooming is completely eliminated. This ensures both smooth operation and zoom positioning accuracy, providing double protection for the reliable operation of telephoto lenses in harsh environments.

[0014] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a small-diameter long lens tube proposed in this utility model.

[0016] Figure 2 This is a diagram illustrating the first threaded groove of a small-diameter long lens barrel structure proposed in this utility model.

[0017] Figure 3 This is a diagram illustrating the screws used in the small-diameter long lens barrel structure proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of a zoom mechanism for a small-diameter long lens barrel structure proposed in this utility model.

[0019] Figure 5 This is a diagram illustrating the second threaded groove of a small-diameter long lens barrel structure proposed in this utility model.

[0020] Figure 6 This is a diagram illustrating a cleaning brush with a small-diameter, long lens barrel structure proposed in this utility model.

[0021] In the attached diagram: 1. Left half mirror; 2. Right half mirror; 3. First threaded groove; 4. Zoom lens; 5. Scale mark; 6. First connecting ring; 7. Second connecting ring; 8. First threaded line; 9. Locking block; 10. Locking slot; 11. Screw; 12. Zoom ring; 13. Cleaning brush; 14. Second threaded line; 15. Slide rail; 16. Second threaded groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 3 A small-diameter long lens barrel structure includes a left half-mirror 1 and a right half-mirror 2 disposed on its right side. The inner end surfaces of the left half-mirror 1 and the right half-mirror 2 are provided with a first threaded groove 3. A zoom lens 4 is slidably connected inside the right half-mirror 2. A scale mark 5 is opened on the right side surface of the right half-mirror 2. The structure also includes: a folding mechanism: the folding mechanism includes a first connecting ring 6 threadedly connected to the rear end of the left half-mirror 1. A second connecting ring 7 is rotatably connected to the right side of the first connecting ring 6. A first thread 8 is opened on the outer side of the first connecting ring 6 and the second connecting ring 7. A locking block 9 is provided on the top of the first connecting ring 6. A locking groove 10 is provided on the top of the second connecting ring 7. A screw 11 is threadedly connected to the top of the locking block 9; a zoom mechanism: the zoom mechanism is fixedly connected to the right side of the right half-mirror 2.

[0024] Specifically, the first connecting ring 6 is screwed into the first threaded groove 3 fixed at the end of the left half mirror 1 via the first threaded line 8 on its outer side. The second connecting ring 7 is fixed to the right half mirror 2 in the same way. The bottoms of the two connecting rings are connected by a hinge, allowing them and the two connected left and right half mirrors to rotate relative to each other around the hinge axis. In the folded state, the user loosens or removes the screw 11, causing the locking block 9 at the top of the first connecting ring 6 to disengage from the locking groove 10 at the top of the second connecting ring 7. The right half mirror 2 can then rotate around the hinge axis and be placed side by side with the left half mirror 1. When it needs to be unfolded for use, the right half mirror 2 is rotated back to the position coaxial with the left half mirror 1. At this time, the locking block 9 will be precisely embedded in the locking groove 10. Finally, the screw 11 is screwed into the threaded hole in the center of the locking block 9 and the locking groove 10 to achieve a rigid connection.

[0025] The first connecting ring 6 is threaded to the surface of the first threaded groove 3 on the right side of the left half mirror 1 via the first threaded line 8, and the second connecting ring 7 is threaded to the surface of the first threaded groove 3 on the left side of the right half mirror 2 via the first threaded line 8. The bottoms of the first connecting ring 6 and the second connecting ring 7 are connected by a hinge. This three-section connection design ensures the stability of the connection between the left and right mirror barrels and realizes the folding function of the mirror barrels. The threaded connection method also makes it easy to replace the left half mirror 1 and the right half mirror 2 separately as needed.

[0026] The locking block 9 and the slot 10 are provided with corresponding threaded holes at their centers. The locking block 9 is locked inside the slot 10, and the screw 11 is threaded into the threaded holes at the center of the locking block 9 and the slot 10. This double locking design ensures both rapid positioning and rigid connection.

[0027] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the zoom mechanism includes a zoom ring 12 rotatably connected to the right side of the right half mirror 2, a cleaning brush 13 fixedly connected to the right side of the zoom ring 12, a second thread 14 formed on the inner side of the zoom ring 12, a slide rail 15 provided on the left side of the second thread 14, and a second thread groove 16 provided on the right side of the second thread 14.

[0028] Specifically, when the user rotates the zoom ring 12, the rotational motion is converted into linear motion of the zoom lens 4 along the optical axis through the engagement of the second thread 14 and the second thread groove 16. The slide rail 15 fixed inside the right half mirror 2 cooperates with the slide groove on the inner side of the zoom ring 12 to guide and prevent rotation. The pointer on the zoom ring 12 cooperates with the scale mark 5 on the surface of the right half mirror 2 to indicate the focal length. At the same time, the cleaning brush 13 fixed to the right side of the zoom ring 12 has soft bristles on its inner side that are always in contact with the surface of the second thread groove 16, and can automatically scrape off dust and impurities in the thread groove during the rotation of the zoom ring 12.

[0029] The zoom ring 12 is rotatably connected to the right end of the right half mirror 2 via the left rotating ring. The cleaning brush 13 has a soft brush on its inner side, which is attached to the surface of the second threaded groove 16. The zoom ring 12 has a pointer on its surface that corresponds to the scale mark 5. This integrated design realizes the multi-functional integration of zoom operation, cleaning function and focal length indication.

[0030] The slide rail 15 is fixedly connected to the right side inside the right half mirror 2. The second threaded groove 16 is opened on the surface of the zoom lens 4. The second threaded groove 16 is threadedly connected to the second thread 14. The surface of the second thread 14 is provided with a groove corresponding to the slide rail 15. This dual guide system provides power through threaded transmission, and at the same time, the cooperation between the slide rail 15 and the groove prevents the lens from rotating, ensuring the accuracy and stability of the zoom lens 4 during zooming.

[0031] Reference Figure 1 and Figure 2 In a preferred embodiment, the left half mirror 1, the right half mirror 2 and the zoom lens 4 are provided with a fixing seat for fixing the lens, the left end of the left half mirror 1 is provided with a buckle that engages with the camera, and a limit ring is provided on the outside of the first threaded groove 3.

[0032] Specifically, this integrated design not only ensures the precise positioning of internal optical components, but also enables quick connection to camera equipment through standardized interfaces. At the same time, the limiting ring structure effectively prevents damage caused by over-tightening of the threads, improving the product's durability and operational safety.

[0033] Working principle: In use, the operator adjusts the focal length by rotating the zoom ring 12. The second thread 14 on the inner side of the zoom ring 12 engages with the second thread groove 16 on the surface of the zoom lens 4, converting the rotational motion into the axial movement of the zoom lens 4. At the same time, the slide rail 15 cooperates with the slide groove on the surface of the second thread 14 to prevent rotation and ensure that the zoom lens 4 slides smoothly. The pointer on the surface of the zoom ring 12 cooperates with the scale mark 5 on the right half mirror 2 to indicate the focal length value. The cleaning brush 13 integrated on the right side of the zoom ring 12 automatically cleans the second thread groove 16 during rotation. When it is necessary to carry or store, the operator loosens the screw 11 to disengage the locking block 9 on the first connecting ring 6 from the locking groove 10 of the second connecting ring 7. Then, the operator rotates the right half mirror 2 around the hinge at the bottom of the first connecting ring 6 and the second connecting ring 7 to fold it side by side with the left half mirror 1. When it is needed, the operator rotates the right half mirror 2 back to the coaxial position with the left half mirror 1 to make the locking block 9 engage with the locking groove 10, and then tightens the screw 11 to lock it. The left half mirror 1 and the right half mirror 2 are connected and fixed to the first threaded groove 3 respectively through the first connecting ring 6 and the second connecting ring 7. The buckle at the left end of the left half mirror 1 is used to connect the camera. The fixing seat inside each component ensures that the lens is accurately positioned. The limiting ring on the outside of the first threaded groove 3 prevents the thread from being over-tightened.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A small-diameter long lens barrel structure, comprising a left half-mirror (1) and a right half-mirror (2) disposed on its right side, wherein the inner end surfaces of the left half-mirror (1) and the right half-mirror (2) are provided with first threaded grooves (3), a zoom lens (4) is slidably connected inside the right half-mirror (2), and a scale mark (5) is provided on the right side surface of the right half-mirror (2), characterized in that, Also includes: Folding mechanism: The folding mechanism includes a first connecting ring (6) threadedly connected to the rear end of the left half mirror (1), a second connecting ring (7) rotatably connected to the right side of the first connecting ring (6), a first thread (8) opened on the outer side of the first connecting ring (6) and the second connecting ring (7), a locking block (9) provided on the top of the first connecting ring (6), a locking groove (10) provided on the top of the second connecting ring (7), and a screw (11) threadedly connected to the top of the locking block (9); Zoom mechanism: The zoom mechanism is fixedly connected to the right side of the right half mirror (2).

2. The small-diameter long lens tube structure according to claim 1, characterized in that, The first connecting ring (6) is threaded to the surface of the first threaded groove (3) on the right side of the left half mirror (1) via the first thread (8), and the second connecting ring (7) is threaded to the surface of the first threaded groove (3) on the left side of the right half mirror (2) via the first thread (8). The bottoms of the first connecting ring (6) and the second connecting ring (7) are rotatably connected by a hinge.

3. The small-diameter long lens tube structure according to claim 2, characterized in that, The card block (9) and the card slot (10) are provided with corresponding threaded holes at their centers. The card block (9) is engaged inside the card slot (10), and the screw (11) is threadedly connected to the central threaded holes of the card block (9) and the card slot (10).

4. The small-diameter long lens tube structure according to claim 1, characterized in that, The zoom mechanism includes a zoom ring (12) rotatably connected to the right side of the right half mirror (2), a cleaning brush (13) fixedly connected to the right side of the zoom ring (12), a second thread (14) is provided on the inner side of the zoom ring (12), a slide rail (15) is provided on the left side of the second thread (14), and a second thread groove (16) is provided on the right side of the second thread (14).

5. The small-diameter long lens tube structure according to claim 4, characterized in that, The zoom ring (12) is rotatably connected to the right end of the right half mirror (2) via the left rotating ring. A soft brush is provided on the inner side of the cleaning brush (13). The soft brush on the inner side of the cleaning brush (13) is attached to the surface of the second threaded groove (16). A pointer corresponding to the scale mark (5) is provided on the surface of the zoom ring (12).

6. The small-diameter long lens tube structure according to claim 5, characterized in that, The slide rail (15) is fixedly connected to the inside right side of the right half mirror (2). The second threaded groove (16) is opened on the surface of the zoom lens (4). The second threaded groove (16) is threadedly connected to the second thread (14). The surface of the second thread (14) is provided with a groove corresponding to the slide rail (15).

7. The small-diameter long lens tube structure according to claim 1, characterized in that, The left half mirror (1), the right half mirror (2) and the zoom lens (4) are provided with fixing seats for fixing lenses. The left end of the left half mirror (1) is provided with a buckle that can be engaged with the camera. The first threaded groove (3) is provided with a limit ring on the outside.

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