Super-large aperture prime lens

Abstract

The utility model discloses an ultra-large aperture prime lens, and relates to the technical field of prime lenses. Comprising a lens cone and a prime lens body, a fixed sleeve is fixedly arranged outside the prime lens body, a movable sleeve is movably arranged outside the prime lens body and located on the right side of the fixed sleeve, a rack is fixedly arranged on one side of the movable sleeve, and mounting blocks are fixedly arranged at the top and the bottom of the prime lens body. A gear is fixedly arranged on the surface of the mounting block, the gear is fixedly connected with a connecting rod, two protection plates are fixedly arranged at one end of the connecting rod, fixing plates are fixedly arranged on one sides of the two protection plates, a pull rod is movably arranged in one fixing plate, and a pull rod is movably arranged in the other fixing plate. The pull rod is sleeved with a second spring, one end of the pull rod is fixedly provided with a clamping block, and the clamping block is movably connected with the other fixing plate.

Description

Technical Field

[0001] The utility model relates to the technical field of fixed-focus lenses, and specifically relates to an ultra-large aperture fixed-focus lens. Background Technique

[0002] A fixed-focus lens refers to a lens with only one fixed focal length, without the concept of a focal length range, or only one field of view. A fixed-focus lens has no zoom function. The design of a fixed-focus lens is much simpler than that of a zoom lens. Generally, a zoom lens will have an impact on imaging during the zooming process, and the greatest advantage of a fixed-focus lens compared to a zoom camera is its fast focusing speed and stable imaging quality.

[0003] Chinese Utility Model Patent CN221056731U discloses a wide-angle fixed-focus lens that is convenient for connection and installation, including: a lens barrel and a wide-angle fixed-focus lens; the lens barrel is detachably connected to the wide-angle fixed-focus lens. A set of positioning rings are rotatably installed on the circumferential outer side of the wide-angle fixed-focus lens on one side of the connecting screw barrel. A plurality of arc-shaped positioning grooves are annularly and equally spaced on the outer surface of the lower layer of the positioning ring. An arc-shaped positioning rod is elastically connected to the circumferential outer side wall of the corresponding lens barrel of the positioning groove. The positioning rod is placed inside the outer side wall of the lens barrel corresponding to the connecting screw hole, and the positioning rod is movably and fittingly slidably connected with the positioning groove. A telescopic chamber is opened in the inner wall of the lens barrel corresponding to the end of the positioning rod far from the positioning groove. The end of the positioning rod placed inside the telescopic chamber is elastically connected with a buffer spring, and the end of the buffer spring far from the positioning rod is connected to the inner wall of the telescopic chamber. This fixed-focus lens is convenient for installation and disassembly, has a self-positioning function, and has a one-time accurate connection function.

[0004] However, although the above device has a self-positioning function and improves the accuracy of connection, it does not have the protection function of a fixed-focus lens. If the lens is exposed externally, it may cause bumps and affect the use effect of the lens, which is not convenient for users to use. Content of the Utility Model

[0005] The utility model provides an ultra-large aperture fixed-focus lens to solve the problems in the background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A super large aperture fixed focus lens, including a lens barrel and a fixed focus lens body. A fixed sleeve is fixedly arranged outside the fixed focus lens body. An activity sleeve is movably arranged outside the fixed focus lens body and on the right side of the fixed sleeve. A rack is fixedly arranged on one side of the activity sleeve. Mounting blocks are fixedly arranged at the top and bottom of the fixed focus lens body. Gears are fixedly arranged on the surfaces of the mounting blocks. The gears are fixedly connected to connecting rods. A protective plate is fixedly arranged at one end of each connecting rod. The number of the protective plates is two, and fixing plates are fixedly arranged on one side of each of the two protective plates. A pull rod is movably arranged inside one of the fixing plates. A second spring is sleeved outside the pull rod. A clamping block is fixedly arranged at one end of the pull rod. The clamping block is movably connected to the other fixing plate.

[0007] Further, a connecting screw hole is fixedly arranged on the inner wall of the lens barrel. A connecting screw cylinder is fixedly arranged on one side of the fixed focus lens body. The connecting screw hole and the connecting screw cylinder are in a threaded connection relationship.

[0008] Further, a telescopic chamber is fixedly arranged inside one side of the lens barrel. A first spring is fixedly arranged inside the telescopic chamber. A positioning ring is fixedly arranged at one end of the first spring. A positioning sleeve is movably arranged outside one side of the fixed focus lens body. The positioning ring and the positioning sleeve are in an inserted connection relationship.

[0009] Further, a rotating slide rail is fixedly arranged on the side of the positioning sleeve close to the fixed focus lens body. A rotating track adapted to the rotating slide rail is arranged on the outer surface of the fixed focus lens body. The rotating slide rail and the rotating track are in a sliding connection relationship.

[0010] Further, the rack and the gear are in a meshing connection relationship.

[0011] Further, a clamping groove adapted to the clamping block is arranged inside the other fixing plate. The clamping block is clamped inside the clamping groove.

[0012] Compared with the prior art, the present utility model provides a super large aperture fixed focus lens, having the following

[0013] Advantages:

[0014] For this super large aperture fixed focus lens, by arranging the rack and the gear, when the user pulls the activity sleeve away from the fixed sleeve, the rack drives the gear to rotate, and then the gear drives the connecting rod to rotate, so that the connecting rod drives the protective plate to turn over, which can protect the fixed focus lens body and prevent the fixed focus lens body from being damaged by knocking. It has strong practicability and is convenient for the user to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a front view structural schematic diagram of the present utility model;

[0017] Figure 3 is an enlarged structural schematic diagram of part A of the present utility model.

[0018] In the figure: 1, lens barrel; 101, connecting screw hole; 2, telescopic chamber; 201, first spring; 202, positioning ring; 3, fixed-focus lens body; 301, connecting screw cylinder; 302, positioning sleeve; 303, rotating slide rail; 304, rotating track; 4, fixed sleeve; 5, movable sleeve; 501, rack; 6, mounting block; 601, gear; 602, connecting rod; 603, protective plate; 7, fixed plate; 701, pull rod; 702, second spring; 703, clamping block. Specific embodiments

[0019] 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 , the present utility model discloses a fixed-focus lens with a super large aperture, including a lens barrel 1 and a fixed-focus lens body 3. A fixed sleeve 4 is fixedly arranged outside the fixed-focus lens body 3. A movable sleeve 5 is movably arranged outside the fixed-focus lens body 3 and on the right side of the fixed sleeve 4. A rack 501 is fixedly arranged on one side of the movable sleeve 5. Mounting blocks 6 are fixedly arranged on both the top and bottom of the fixed-focus lens body 3. A gear 601 is fixedly arranged on the surface of the mounting block 6. The gear 601 is fixedly connected to a connecting rod 602. One end of the connecting rod 602 is fixedly provided with a protective plate 603. The number of the protective plates 603 is two, and fixed plates 7 are fixedly arranged on one side of each of the two protective plates 603. A pull rod 701 is movably arranged inside one of the fixed plates 7. A second spring 702 is sleeved outside the pull rod 701. One end of the pull rod 701 is fixedly provided with a clamping block 703. The clamping block 703 is movably connected to the other fixed plate 7.

[0021] Specifically, a connecting screw hole 101 is fixedly arranged on the inner wall of the lens barrel 1. A connecting screw cylinder 301 is fixedly arranged on one side of the fixed-focus lens body 3. The connecting screw hole 101 and the connecting screw cylinder 301 are in a threaded connection relationship.

[0022] In this embodiment, by providing the connecting screw hole 101 and the connecting screw cylinder 301, using the threaded connection relationship between the connecting screw hole 101 and the connecting screw cylinder 301, by rotating the connecting screw cylinder 301 to threadedly connect it with the connecting screw hole 101, the lens barrel 1 and the fixed-focus lens body 3 can be connected. The operation is convenient, the steps are simple, which facilitates the user to use.

[0023] Specifically, an expansion chamber 2 is fixedly arranged inside one side of the lens barrel 1, a first spring 201 is fixedly arranged inside the expansion chamber 2, a positioning ring 202 is fixedly arranged at one end of the first spring 201, and a positioning sleeve 302 is movably arranged outside one side of the fixed-focus lens body 3. The connection relationship between the positioning ring 202 and the positioning sleeve 302 is a plug-in connection.

[0024] In this embodiment, by providing the positioning ring 202 and the positioning sleeve 302, using the plug-in connection relationship between the positioning ring 202 and the positioning sleeve 302, when the user inserts the positioning ring 202 into the inside of the positioning sleeve 302, the connection stability between the lens barrel 1 and the fixed-focus lens body 3 can be increased, which has strong practicability and is convenient for the user to use.

[0025] Specifically, a rotating slide rail 303 is fixedly arranged on the side of the positioning sleeve 302 close to the fixed-focus lens body 3, a rotating track 304 adapted to the rotating slide rail 303 is provided on the outer surface of the fixed-focus lens body 3, and the connection relationship between the rotating slide rail 303 and the rotating track 304 is a sliding connection.

[0026] In this embodiment, by providing the rotating slide rail 303 and the rotating track 304, using the sliding connection relationship between the rotating slide rail 303 and the rotating track 304, the rotation of the positioning sleeve 302 is more stable, which has strong practicability and is convenient for the user to use.

[0027] Specifically, the connection relationship between the rack 501 and the gear 601 is a meshing connection.

[0028] In this embodiment, by providing the rack 501 and the gear 601, using the meshing connection relationship between the rack 501 and the gear 601, when the user pulls the movable sleeve 5 away from the fixed sleeve 4, the rack 501 drives the gear 601 to rotate, and then the gear 601 drives the connecting rod 602 to rotate, so that the connecting rod 602 drives the protection plate 603 to flip, which can make the protection plate 603 protect the fixed-focus lens body 3 and prevent the fixed-focus lens body 3 from being knocked and damaged. It has strong practicability and is convenient for the user to use.

[0029] Specifically, a clamping groove adapted to the clamping block 703 is provided inside the other fixing plate 7, and the clamping block 703 is clamped inside the clamping groove.

[0030] In this embodiment, by providing the clamping block 703 and utilizing the clamping relationship between the clamping block 703 and the clamping groove of the other fixed plate 7, by pulling the pull rod 701, the second spring 702 is compressed, and then the pull rod 701 drives the clamping block 703 to move into the interior of the fixed plate 7, thus releasing the clamping state of the clamping block 703 and the other fixed plate 7 and unlocking the locking between the fixed plates 7, which facilitates the opening of the protection plate 603.

[0031] During use, the user first inserts the positioning ring 202 into the interior of the positioning sleeve 302, and then threads the connecting screw cylinder 301 with the connecting screw hole 101 by rotation, thus connecting the lens barrel 1 and the fixed-focus lens body 3. By utilizing the meshing connection relationship between the rack 501 and the gear 601, the user pulls the movable sleeve 5 away from the fixed sleeve 4, causing the rack 501 to drive the gear 601 to rotate, and then the gear 601 drives the connecting rod 602 to rotate, thereby the connecting rod 602 drives the protection plate 603 to flip, enabling the protection plate 603 to protect the fixed-focus lens body 3 and prevent the fixed-focus lens body 3 from being damaged by being knocked. When it is necessary to open the protection plate 603, by utilizing the clamping relationship between the clamping block 703 and the clamping groove of the other fixed plate 7, by pulling the pull rod 701, the second spring 702 is compressed, and then the pull rod 701 drives the clamping block 703 to move into the interior of the fixed plate 7, thus releasing the clamping state of the clamping block 703 and the other fixed plate 7 and unlocking the locking between the fixed plates 7, which facilitates the opening of the protection plate 603.

[0032] In summary, for this large-aperture fixed-focus lens, by providing the rack 501 and the gear 601, the user pulls the movable sleeve 5 away from the fixed sleeve 4, causing the rack 501 to drive the gear 601 to rotate, and then the gear 601 drives the connecting rod 602 to rotate, thereby the connecting rod 602 drives the protection plate 603 to flip, enabling the protection plate 603 to protect the fixed-focus lens body 3 and prevent the fixed-focus lens body 3 from being damaged by being knocked, which has strong practicability and is convenient for the user to use.

[0033] Although the embodiments of the present invention 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 principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-large aperture fixed-focus lens, comprising a lens barrel (1) and a fixed-focus lens body (3), characterized in that: A fixed sleeve (4) is fixedly provided on the outside of the fixed-focus lens body (3); a movable sleeve (5) is movably provided on the outside of the fixed-focus lens body (3) and located on the right side of the fixed sleeve (4); a rack (501) is fixedly provided on one side of the movable sleeve (5); a mounting block (6) is fixedly provided on the top and bottom of the fixed-focus lens body (3); a gear (601) is fixedly provided on the surface of the mounting block (6); the gear (601) is fixedly connected to a connecting rod (602); the connecting rod ( A protective plate (603) is fixedly provided at one end of the protective plate (602), the number of the protective plates (603) is two, and a fixed plate (7) is fixedly provided on one side of the two protective plates (603), a pull rod (701) is movably provided inside one of the fixed plates (7), a second spring (702) is sleeved on the outside of the pull rod (701), a clamping block (703) is fixedly provided at one end of the pull rod (701), and the clamping block (703) is movably connected to the other fixed plate (7).

2. The ultra-large aperture fixed-focus lens according to claim 1, characterized in that: A connecting screw hole (101) is fixedly provided on the inner wall of the lens barrel (1), and a connecting screw barrel (301) is fixedly provided on one side of the fixed-focus lens body (3), and the connection relationship between the connecting screw hole (101) and the connecting screw barrel (301) is a threaded connection.

3. The ultra-large aperture fixed-focus lens according to claim 1, wherein: A telescopic chamber (2) is fixedly provided inside one side of the lens barrel (1), a first spring (201) is fixedly provided inside the telescopic chamber (2), a positioning ring (202) is fixedly provided at one end of the first spring (201), a positioning sleeve (302) is movably provided outside one side of the fixed-focus lens body (3), and the connection relationship between the positioning ring (202) and the positioning sleeve (302) is plug-in.

4. The ultra-large aperture fixed-focus lens according to claim 3, wherein: A rotating slide rail (303) is fixedly provided on the side of the positioning sleeve (302) close to the fixed-focus lens body (3); a rotating track (304) adapted to the rotating slide rail (303) is provided on the outer surface of the fixed-focus lens body (3); and the connection relationship between the rotating slide rail (303) and the rotating track (304) is a sliding connection.

5. The ultra-large aperture fixed-focus lens according to claim 1, wherein: The connection relationship between the rack (501) and the gear (601) is a meshing connection.

6. The ultra-large aperture fixed-focus lens according to claim 1, wherein: A clamping groove adapted to the clamping block (703) is provided inside the other fixing plate (7), and the clamping block (703) is clamped inside the clamping groove.

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