Lens cover capable of being quickly opened

Abstract

The utility model discloses a lens cover capable of being quickly opened, which comprises a cover body, a protection plate, a mounting box and a connector, and is characterized in that the protection plate is connected with the mounting box; the mounting box comprises a box body and a positioning structure; the positioning mechanism comprises a ratchet wheel, a pawl, a connecting rod, a compression spring, a mounting sleeve, a clockwork spring and a driving shaft; the driving shaft is rotationally connected with the box body; the ratchet wheel is fixedly connected to the driving shaft; the connecting rod is movably connected with the box body, and the pawl is fixedly connected to the top of the connecting rod and connected with the ratchet wheel in a matched mode. The top of the compression spring is connected with the pawl and the bottom is connected with the shell; the installation sleeve is arranged on the outer side of the driving shaft and fixedly connected with the box body, the clockwork spring is arranged in the spring sleeve, the two ends of the clockwork spring are fixedly connected with the installation sleeve and the driving shaft respectively, and the bottom of the protection plate is connected with the driving shaft. Through cooperative connection of the protection plate, the ratchet wheel, the pawl, the connecting rod, the compression spring, the mounting sleeve, the clockwork spring and the driving shaft, the lens cover can be rapidly opened and closed.

Description

Technical Field

[0001] The utility model belongs to the technical field of cameras, and particularly relates to a lens cap that can be quickly opened. Background Art

[0002] A lens cap is a component used to protect the camera lens, usually made of plastic or metal. It is designed as a lid that matches the shape of the lens and is used to cover the front of the lens to prevent dust, scratches or other adverse factors from damaging the lens surface. Before shooting, the lens cap usually needs to be removed to allow light to enter the lens for shooting. When the camera is not in use, the lens cap can play a protective role to keep the lens clean and intact.

[0003] Most of the existing lens caps are of the front cover type and the magnetic type. The lens cap of the front cover type is directly installed in the front of the lens and fixed on the lens by a mechanical device or thread. When in use, the user needs to manually remove or cover the lens cap. The magnetic lens cap realizes the adsorption and fixation of the lens cap by setting magnets on the lens and the lens cap. When shooting in a harsh environment, such as in an environment with strong wind and sand, the lens cap needs to be installed on the lens in time after each shooting to prevent the lens from being damaged. However, for each shooting, the lens cap needs to be removed and reinstalled. If an ordinary front cover type lens cap is used, there will be problems of inconvenient opening and time-consuming. If an ordinary magnetic lens cap is used, there will be problems of poor protection effect.

[0004] In the patent with the publication number of CN105259631A, a lens protection front cover is disclosed. The lens cap housing of this structure is made of elastic plastic material. Through elastic deformation, the snap ring firmly holds the lens in the front cover housing. The connection method of snap connection can ensure that the lens cap is stably connected to the lens and is not easy to fall off, and has a good protection effect on the lens. However, this structure of the lens cap is difficult to remove and install each time, and there are problems of time-consuming and troublesome use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a lens cap that can be quickly opened to solve the following technical problems raised in the background art:

[0006] In the prior art, when the environment is relatively harsh, the lens cap needs to be frequently used to protect the lens. However, the existing lens caps have problems of inconvenient opening and time-consuming opening when in use.

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

[0008] A lens cap that can be quickly opened, comprising a cap body, a protection plate, a mounting box and a connector. The connector is fixedly connected to one side of the cap body. The mounting box is arranged at the bottom of the front side of the cap body, and the protection plate is connected to the mounting box;

[0009] The mounting box includes a box body and a positioning structure; the positioning mechanism includes a ratchet wheel, a pawl, a connecting rod, a compression spring, a mounting sleeve, a clockwork spring and a driving shaft;

[0010] The driving shaft is rotatably connected to the box body, and the ratchet wheel is fixedly connected to the driving shaft; the connecting rod is movably connected to the box body, the pawl is fixedly connected to the top of the connecting rod, and the pawl is connected to the ratchet wheel in a matching manner; the top of the compression spring is connected to the pawl, and the bottom is connected to the housing; the mounting sleeve is arranged outside the driving shaft and the mounting sleeve is fixedly connected to the box body. The clockwork spring is arranged in the spring sleeve, and both ends of the clockwork spring are fixedly connected to the mounting sleeve and the driving shaft respectively. The bottom of the protection plate is connected to the driving shaft.

[0011] Further, a chamfer is provided on the outer edge of the front side of the cap body.

[0012] Further, the protection plate includes a left protection plate and a right protection plate; a driven shaft is also rotatably connected in the box body. A driving gear is fixedly connected to the driving shaft, a driven gear is fixedly connected to the driven shaft, and the driving gear is meshed with the driven gear; the bottom of the left protection plate is fixedly connected to the driven shaft, and the bottom of the right protection plate is fixedly connected to the driving shaft.

[0013] Further, a sealing gasket is provided on the side of the left protection plate facing the right protection plate, and a sealing groove is provided on the side of the right protection plate facing the left protection plate.

[0014] Further, support rods are fixedly connected to the bottoms of both the left protection plate and the right protection plate. The left protection plate is connected to the driven shaft through the support rod, and the right protection plate is connected to the driving shaft through the support rod; a limiting block is fixedly connected to a position near the bottom of the outer side of the box body.

[0015] Further, a connecting cylinder is fixedly connected to the bottom of the box body. A fixed head is fixedly connected to the bottom inside the connecting cylinder. An activity hole is provided on the fixed head, and one side of the connecting rod is movably connected in the activity hole; the compression spring is sleeved outside the connecting rod, and one end of the compression spring is connected to the pawl, and the other end of the compression spring is connected to the fixed head.

[0016] Further, a limiting hole is provided on the fixed head, and a limiting rod is fixedly connected to the bottom of one side of the pawl, and the bottom of the limiting rod is movably connected in the limiting hole.

[0017] Further, a pulling head is fixedly connected to the bottom of the connecting rod.

[0018] Further, an L-shaped mounting rod is fixedly connected to the outside of the mounting sleeve. One end of the mounting rod is fixedly connected to the box body, and the other end is fixedly connected to the mounting sleeve.

[0019] Further, an installation groove is provided on the driving shaft, and a positioning head is fixedly connected inside the installation sleeve; one side of the clockwork spring is inserted into the installation groove and fixedly connected to the driving shaft, and the other side of the clockwork spring is fixedly connected to the positioning head.

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

[0021] When the lens cover of the utility model is closed, the protection plate is pushed, and the protection plate drives the driving shaft to rotate. The driving shaft rotates the ratchet wheel, and the teeth on the ratchet wheel push the pawl downward, driving the compression spring to contract. When the pawl passes through a tooth, the compression spring resets and pushes the pawl to contact the next tooth, preventing the driving shaft from rotating in the reverse direction. When the driving shaft rotates, the clockwork spring will be tightened, and the pawl prevents the clockwork spring from resetting. Closing the protection plate completely seals the opening of the cover body. When the lens cover needs to be opened, the user pulls the connecting rod to separate the pawl from the ratchet wheel. At this time, the ratchet wheel is not restricted and can rotate in the reverse direction. The clockwork spring resets, and the driving shaft rotates to lower the protection plate. This design can quickly open the lens cover when needed and quickly close it after shooting, providing a convenient user experience. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the utility model;

[0023] Figure 2 is the internal structural schematic diagram of the installation box of the utility model;

[0024] Figure 3 is the first sectional view of the installation box of the utility model;

[0025] Figure 4 is the second sectional view of the installation box of the utility model;

[0026] Figure 5 is the schematic diagram after the protection plate of the utility model is opened.

[0027] Markings in the figure: 1 - cover body, 2 - connecting head, 3 - installation box, 301 - installation rod, 302 - ratchet wheel, 303 - installation sleeve, 304 - driving shaft, 305 - driving gear, 306 - driven gear, 307 - driven shaft, 308 - box body, 309 - pawl, 310 - fixed head, 311 - moving hole, 312 - pulling head, 313 - connecting rod, 314 - limiting rod, 315 - limiting hole, 316 - connecting cylinder, 317 - compression spring, 318 - clockwork spring, 319 - positioning head, 320 - installation groove, 4 - limiting block, 5 - support rod, 6 - protection plate, 601 - left protection plate, 602 - right protection plate. Detailed Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model 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 making creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment

[0030] A lens cap that can be quickly opened, as Figure 1 shown, includes a cover body 1, a protection plate 6, an installation box 3 and a connector 2. The connector 2 is fixedly connected to one side of the cover body 1. The installation box 3 is arranged at the bottom of the front side of the cover body 1. The protection plate 6 is connected to the installation box 3. The connector 2 is used to connect to the lens.

[0031] As Figure 2 shown, the installation box 3 includes a box body 308 and a positioning structure. The positioning mechanism includes a ratchet wheel 302, a pawl 309, a connecting rod 313, a compression spring 317, an installation sleeve 303, a hairspring 318 and a driving shaft 304.

[0032] As Figure 3 shown, the driving shaft 304 is rotatably connected to the box body 308. The ratchet wheel 302 is fixedly connected to the driving shaft 304. The connecting rod 313 is movably connected to the box body 308. The pawl 309 is fixedly connected to the top of the connecting rod 313. The pawl 309 is cooperatively connected to the ratchet wheel 302. The top of the compression spring 317 is connected to the pawl 309, and the bottom is connected to the housing. As Figure 4 shown, the installation sleeve 303 is arranged outside the driving shaft 304 and the installation sleeve 303 is fixedly connected to the box body 308. The hairspring 318 is arranged in the spring sleeve. Both ends of the hairspring 318 are fixedly connected to the installation sleeve 303 and the driving shaft 304 respectively. The bottom of the protection plate 6 is connected to the driving shaft 304.

[0033] As Figure 5As shown, when the present utility model is in the open state, the protection plate 6 is located on the side of the cover body 1; in the initial state, the protection plate 6 is located on one side of the cover body 1, that is, when the cover body 1 is in the open state, at this time, there is no obstruction on the front side of the cover body 1, and the camera can directly take pictures. When it is necessary to close the lens cover by closing the protection plate 6, the protection plate 6 can be directly pushed by hand. During this process, the protection plate 6 drives the driving shaft 304 to rotate, the driving shaft 304 drives the ratchet wheel 302 to rotate, and the teeth on the ratchet wheel 302 will push the pawl 309 to move downward and drive the compression spring 317 to contract. After the pawl 309 passes through a tooth, the compression spring 317 resets and pushes the pawl 309 to contact the next tooth, so as to prevent the driving shaft 304 and the ratchet wheel 302 from rotating in the reverse direction. During the rotation of the driving shaft 304, the driving shaft 304 will also drive the clockwork spring 318 to tighten, and the pawl 309 can prevent the clockwork spring 318 from resetting. Push the protection plate 6 until it completely closes the opening of the cover body 1. When it is necessary to open the lens cover, that is, when it is necessary to put down the protection plate 6, pull the connecting rod 313, and the connecting rod 313 drives the pawl 309 to separate from the ratchet wheel 302. At this time, the ratchet wheel 302 is no longer restricted by the pawl 309 and can rotate in the reverse direction. The clockwork spring 318 resets and drives the driving shaft 304 to rotate, thereby putting down the protection plate 6. Through this design, the lens cover can be quickly opened when shooting is required, and the lens cover can be quickly closed after shooting is completed, which has the advantage of convenient use.

[0034] In a preferred embodiment, as Figure 5 shown, a chamfer is provided on the outer edge of the front side of the cover body 1. The design of the chamfer is on the one hand to reduce the sharpness of the front edge of the cover body 1, and on the other hand to avoid interference between the cover body 1 and the protection plate 6. During use, the protection plate 6 may tilt towards the side of the cover body 1 due to the looseness of the connecting piece. When closing the protection plate 6, the edge of the protection plate 6 will easily contact the edge of the cover body 1 and cause interference. After the chamfer is provided, the chamfer can guide the protection plate 6, so that the protection plate 6 can stably and accurately close the opening of the cover body 1.

[0035] In a preferred embodiment, as Figure 1As shown in the figure, the protection plate 6 includes a left protection plate 601 and a right protection plate 602; a driven shaft 307 is also rotatably connected inside the box body 308. A driving gear 305 is fixedly connected to the driving shaft 304, and a driven gear 306 is fixedly connected to the driven shaft 307. The driving gear 305 meshes with the driven gear 306; the bottom of the left protection plate 601 is fixedly connected to the driven shaft 307, and the bottom of the right protection plate 602 is fixedly connected to the driving shaft 304. The two protection plates 6, namely the left protection plate 601 and the right protection plate 602, are provided to more conveniently open the lens cover. Specifically, during use, the driving shaft 304 rotates counterclockwise and drives the right protection plate 602 to close the right opening of the cover body 1. The driving gear 305 on the driving shaft 304 drives the driven gear 306 to rotate clockwise, the driven gear 306 drives the driven shaft 307 to rotate clockwise, and the driven shaft 307 drives the left protection plate 601 to close the left opening of the cover body 1.

[0036] In a preferred embodiment, a sealing gasket is provided on the side of the left protection plate 601 facing the right protection plate 602, and a sealing groove is provided on the side of the right protection plate 602 facing the left protection plate 601. The design of the sealing gasket and the sealing groove is to improve the sealing performance between the left protection plate 601 and the right protection plate 602, and prevent dust from entering the lens cover through the gap between the left protection plate 601 and the right protection plate 602. When the left protection plate 601 and the right protection plate 602 close the opening of the cover body 1, the sealing gasket on the left protection plate 601 will enter the sealing groove on the right protection plate 602, thereby achieving sealing.

[0037] In a preferred embodiment, as Figure 1 shown, support rods 5 are fixedly connected to the bottoms of both the left protection plate 601 and the right protection plate 602. The left protection plate 601 is connected to the driven shaft 307 through the support rod 5, and the right protection plate 602 is connected to the driving shaft 304 through the support rod 5; a limiting block 4 is fixedly connected to a position near the bottom outside the box body 308. The limiting block 4 is used to limit the left protection plate 601 and the right protection plate 602 to prevent the left protection plate 601 and the right protection plate 602 from colliding when the left protection plate 601 and the right protection plate 602 are opened. After the limiting block 4 is provided, when the right protection plate 602 is opened, after the right protection plate 602 rotates 90 degrees, the support rod 5 on the right protection plate 602 will contact the limiting block 4 to achieve the limitation of the right protection plate 602; similarly, when the left protection plate 601 is opened, after the left protection plate 601 rotates 90 degrees, the support rod 5 on the left protection plate 601 will contact the limiting block 4 to achieve the limitation of the left protection plate 601.

[0038] In a preferred embodiment, as Figure 3As shown, a connecting cylinder 316 is fixedly connected to the bottom of the box body 308. A fixing head 310 is fixedly connected to the bottom inside the connecting cylinder 316. An activity hole 311 is provided on the fixing head 310. One side of the connecting rod 313 is movably connected inside the activity hole 311; a compression spring 317 is sleeved outside the connecting rod 313, and one end of the compression spring 317 is connected to the pawl 309, and the other end of the compression spring 317 is connected to the fixing head 310. The design of the connecting cylinder 316 and the fixing head 310 is to facilitate the installation of the connecting rod 313. After the connecting cylinder 316 is provided, the connecting rod 313 can be set longer, that is, the connecting rod 313 can protrude more outward, so as to facilitate pulling the connecting rod 313, that is, to facilitate opening the lens cover.

[0039] In a preferred embodiment, as Figure 3 shown, a limiting hole 315 is provided on the fixing head 310. A limiting rod 314 is fixedly connected to the bottom of one side of the pawl 309. The bottom of the limiting rod 314 is movably connected inside the limiting hole 315. The design of the limiting hole 315 and the limiting rod 314 is to limit the pawl 309. Usually, since the pawl 309 is always engaged with the teeth on the ratchet wheel 302, the pawl 309 will not rotate. However, when the connecting rod 313 is pulled downward, the pawl 309 may rotate when it disengages from the teeth on the ratchet wheel 302. As a result, the pawl 309 cannot effectively limit the teeth after resetting. After the limiting rod 314 and the limiting hole 315 are provided, the limiting rod 314 can move up and down together with the connecting rod 313 and the pawl 309. At the same time, the limiting rod 314 can prevent the limiting rod 314 and the pawl 309 from rotating. Preferably, the connecting rod 313 can also be set to have a polygonal cross-section structure, which can also effectively prevent the pawl 309 from rotating, but this design has a large processing difficulty.

[0040] In a preferred embodiment, as Figure 3 shown, a pulling head 312 is fixedly connected to the bottom of the connecting rod 313. The pulling head 312 is specifically a horizontal rod, and the middle of the pulling head 312 is fixedly connected to the connecting rod 313. The pulling head 312 is used to facilitate the user to pull the connecting rod 313.

[0041] In a preferred embodiment, as Figure 2As shown, an L-shaped mounting rod 301 is fixedly connected to the outer side of the mounting sleeve 303. One end of the mounting rod 301 is fixedly connected to the box body 308, and the other end is fixedly connected to the mounting sleeve 303. The mounting sleeve 303 is mainly used for mounting and fixing the clockwork spring 318. Therefore, the mounting sleeve 303 should be located outside the driving shaft 304 and the position of the mounting sleeve 303 needs to be fixed and cannot rotate. The L-shaped mounting rod 301 can stably fix the position of the mounting sleeve 303, thus facilitating the use of the mounting sleeve 303 to mount the clockwork spring 318. This structural design enables the mounting sleeve 303 to be firmly fixed outside the driving shaft 304, providing a reliable support platform, enabling users to easily and stably use the mounting sleeve 303 to mount the clockwork spring 318.

[0042] In a preferred embodiment, as Figure 4 shown, a mounting groove 320 is provided on the driving shaft 304, and a positioning head 319 is fixedly connected inside the mounting sleeve 303; one side of the clockwork spring 318 is inserted into the mounting groove 320 and fixedly connected to the driving shaft 304, and the other side of the clockwork spring 318 is fixedly connected to the positioning head 319. This design is for the convenience of installing and replacing the clockwork spring 318. During use, first insert the inner end of the clockwork spring 318 into the mounting groove 320 on the driving shaft 304, and then clamp the outer end of the clockwork spring 318 on the positioning head 319. This design is simple and easy to implement, making the installation and replacement of the clockwork spring 318 more convenient and rapid.

[0043] 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.

[0044] In the present invention, unless otherwise clearly specified and defined, the terms "mount", "set", "connect", "fix", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of 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 invention can be understood according to specific circumstances.

[0045] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand 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 cover that can be opened quickly, characterized in that: It comprises a cover body (1), a protection plate (6), a mounting box (3) and a connector (2), wherein the connector (2) is fixedly connected to one side of the cover body (1), the mounting box (3) is arranged at the bottom of the front side of the cover body (1), and the protection plate (6) is connected to the mounting box (3); The installation box (3) comprises a box body (308) and a positioning structure; the positioning mechanism comprises a ratchet (302), a pawl (309), a connecting rod (313), a compression spring (317), an installation sleeve (303), a spring spring (318) and a driving shaft (304); The driving shaft (304) is rotatably connected to the box body (308), and the ratchet (302) is fixedly connected to the driving shaft (304); the connecting rod (313) is movably connected to the box body (308), the pawl (309) is fixedly connected to the top of the connecting rod (313), and the pawl (309) is cooperatively connected to the ratchet (302); the top of the compression spring (317) is connected to the pawl (309), and the bottom is connected to the housing; the mounting sleeve (303) is arranged on the outside of the driving shaft (304) and the mounting sleeve (303) is fixedly connected to the box body (308), the spring spring (318) is arranged in the spring sleeve, and the two ends of the spring spring (318) are respectively fixedly connected to the mounting sleeve (303) and the driving shaft (304), and the bottom of the protection plate (6) is connected to the driving shaft (304).

2. The quick-open lens cover according to claim 1, characterized in that: The front outer edge of the cover body (1) is provided with a chamfer.

3. The quick-open lens cover according to claim 1, characterized in that: The protection plate (6) comprises a left protection plate (601) and a right protection plate (602); a driven shaft (307) is rotatably connected in the box body (308); a driving gear (305) is fixedly connected to the driving shaft (304); a driven gear (306) is fixedly connected to the driven shaft (307); the driving gear (305) meshes with the driven gear (306); the bottom of the left protection plate (601) is fixedly connected to the driven shaft (307); and the bottom of the right protection plate (602) is fixedly connected to the driving shaft (304).

4. The quick-open lens cover according to claim 3, characterized in that: A sealing gasket is provided on the side of the left protection plate (601) facing the right protection plate (602), and a sealing groove is provided on the side of the right protection plate (602) facing the left protection plate (601).

5. The quick-open lens cover according to claim 3, characterized in that: The bottoms of the left protection plate (601) and the right protection plate (602) are both fixedly connected with support rods (5); the left protection plate (601) is connected to the driven shaft (307) through the support rods (5), and the right protection plate (602) is connected to the driving shaft (304) through the support rods (5); and a limiting block (4) is fixedly connected to the outer side of the box body (308) near the bottom.

6. The quick-open lens cover according to claim 1, characterized in that: A connecting tube (316) is fixedly connected to the bottom of the box body (308); a fixing head (310) is fixedly connected to the bottom of the connecting tube (316); a movable hole (311) is provided on the fixing head (310); one side of the connecting rod (313) is movably connected in the movable hole (311); a compression spring (317) is sleeved on the outside of the connecting rod (313); one end of the compression spring (317) is connected to the ratchet (309); and the other end of the compression spring (317) is connected to the fixing head (310).

7. The quick-open lens cover according to claim 6, characterized in that: A limiting hole (315) is provided on the fixed head (310), a limiting rod (314) is fixedly connected to the bottom of one side of the ratchet pawl (309), and the bottom of the limiting rod (314) is movably connected in the limiting hole (315).

8. The quick-open lens cover according to claim 1, characterized in that: The bottom of the connecting rod (313) is fixedly connected with a pulling head (312).

9. The quick-open lens cover according to claim 1, characterized in that: An L-shaped mounting rod (301) is fixedly connected to the outer side of the mounting sleeve (303); one end of the mounting rod (301) is fixedly connected to the box body (308), and the other end is fixedly connected to the mounting sleeve (303).

10. The quick-open lens cover according to claim 1, characterized in that: The driving shaft (304) is provided with a mounting groove (320), and a positioning head (319) is fixedly connected in the mounting sleeve (303); one side of the spring (318) is inserted in the mounting groove (320) and fixedly connected to the driving shaft (304), and the other side of the spring (318) is fixedly connected to the positioning head (319).

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