Lens protective cover

Abstract

The lens protection cover comprises an end cover and a cylinder body which are connected, the end cover blocks an opening at one end of the cylinder body, the inner circumferential wall of the cylinder body is provided with a limiting flange protruding inwards, the inner side face of the limiting flange is a limiting face, and a receding cavity is formed between the limiting face and the inner wall face of the end cover. The lens protection cover is novel in structure, the limiting face of the limiting flange can abut against and limit the end face of the lens barrel of the lens assembly, and when at least part of the area of the first lens in the lens assembly protrudes relative to the end face of the lens barrel, the receding cavity can effectively keep the first lens away from the first lens. Therefore, the first lens is prevented from being polluted and scratched due to the fact that the first lens is in direct contact with the lens protection cover. In the manufacturing process of the lens assembly, the lens protection cover can well protect the lens assembly, the product replacement rate is reduced, the subsequent defective product cleaning step is not needed, the production efficiency is improved, and the production cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lens protection accessory technical field, especially lens protection cover for covering and protecting lens lens. BACKGROUND

[0002] The lens protection cover is used for protecting the assembled lens, and prevents the first lens (i.e.

[0003] Figure 1 A sectional view of a commonly used lens protection cover is shown, however, the inventor has found that the first lens protrudes from the end face of the lens barrel in some lens assemblies, at this time, the first lens is in contact with the lens protection cover, so that the exposed surface of the first lens is contaminated and damaged, causing the lens assembly product to be defective. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems that a lens protection cover that does not contaminate the first lens in a lens assembly is provided.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme that the lens protection cover comprises a cover and a barrel connected together, the cover seals one end opening of the barrel, the inner circumferential wall of the barrel has a limiting flange protruding inward, the inner side surface of the limiting flange is a limiting surface, and the limiting surface and the inner wall surface of the cover have an empty cavity.

[0006] Further, the number of limiting flanges is multiple, and the multiple limiting flanges are evenly distributed in a circle.

[0007] Further, the limiting flange is in the form of a continuous ring.

[0008] Further, the end face of the other end of the barrel is provided with an exhaust hole, and the exhaust hole communicates with the empty cavity.

[0009] Further, the exhaust hole comprises a first section and a second section connected in sequence, the first section is located on the side of the limiting surface away from the cover, the first section is a first notch provided on the inner circumferential wall of the barrel, and the second section is a through structure on the limiting flange.

[0010] Further, the exhaust hole further comprises a third section communicating with the second section, the third section is provided on the inner circumferential wall of the barrel and located on the side of the limiting flange close to the cover, and the third section is a second notch communicating with the empty cavity.

[0011] Further, the distance between the limiting surface and the inner wall surface of the cover is 1mm-5mm.

[0012] Further, the distance between the limiting surface and the inner wall surface of the end cover is 2mm.

[0013] Further, the central region of the inner wall surface of the end cover is provided with an emptying groove communicating with the emptying cavity.

[0014] Further, the peripheral wall of the barrel has a draft.

[0015] The beneficial effects of the utility model lie in that: the lens protection cover has novel structure, the limiting surface of the limiting flange can abut against the end surface of the lens barrel of the lens assembly, when at least part of the first lens is protruded relative to the end surface of the lens barrel, the emptying cavity can effectively avoid the first lens, so that the first lens is prevented from being polluted and scratched by directly contacting the lens protection cover; during the manufacturing process of the lens assembly, the lens protection cover can well protect the lens assembly, reduces the product return rate, and does not need subsequent cleaning of defective products, which is beneficial to improving production efficiency and saving production cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional view of the prior lens protection cover;

[0017] Figure 2 is a sectional view of the lens protection cover of embodiment one;

[0018] Figure 3 is a front view of the lens protection cover of embodiment one.

[0019] REFERENCE SIGNS:

[0020] 1, end cover; 11, emptying groove;

[0021] 2, barrel;

[0022] 3, limiting flange; 31, limiting surface;

[0023] 4, emptying cavity;

[0024] 5, exhaust hole. DETAILED DESCRIPTION

[0025] The technical content of the utility model, the purposes and effects achieved will be described in detail below in combination with the embodiments and the drawings.

[0026] Please refer to Figure 2 and Figure 3The lens protection cover comprises a connected end cover 1 and a barrel 2, the end cover 1 blocks an opening of one end of the barrel 2, an inner circumferential wall of the barrel 2 has an inwardly protruding limiting flange 3, an inner side surface of the limiting flange 3 is a limiting surface 31, and a clearance chamber 4 is formed between the limiting surface 31 and an inner wall surface of the end cover 1.

[0027] From the above description, the beneficial effects of the lens protection cover are that the lens protection cover has a novel structure, the limiting surface 31 of the limiting flange 3 can abut against an end surface of a lens barrel of a lens assembly, when at least a partial region of a first lens of the lens assembly protrudes relative to the end surface of the lens barrel, the clearance chamber 4 can effectively avoid the first lens, thereby avoiding that the first lens is directly contacted with the lens protection cover and is polluted and scratched, the lens protection cover can well protect the lens assembly during manufacturing of the lens assembly, the product return rate is reduced, subsequent cleaning of defective products is not needed, production efficiency is improved, and production cost is saved.

[0028] Further, the limiting flange 3 is a plurality of limiting flanges, and the plurality of limiting flanges are uniformly distributed in a circle.

[0029] Further, the limiting flange 3 is a continuous ring.

[0030] From the above description, the specific structure of the limiting flange 3 has multiple options, which is beneficial to enrich the diversity of the lens protection cover.

[0031] Further, an end surface of the other end of the barrel 2 is provided with an exhaust hole 5, and the exhaust hole 5 communicates with the clearance chamber 4.

[0032] From the above description, the existence of the exhaust hole 5 can prevent the clearance chamber 4 from forming a closed space after the lens assembly is covered by the lens protection cover, so that the lens assembly is not adversely affected during the process of being disassembled.

[0033] Further, the exhaust hole 5 comprises a first section and a second section connected in sequence, the first section is located on a side of the limiting surface 31 away from the end cover 1, the first section is a first notch provided on the inner circumferential wall of the barrel 2, and the second section is a through structure on the limiting flange 3.

[0034] Further, the exhaust hole 5 further comprises a third section communicating with the second section, the third section is provided on the inner circumferential wall of the barrel 2 and located on a side of the limiting flange 3 close to the end cover 1, and the third section is a second notch communicating with the clearance chamber 4.

[0035] From the above description, the specific structure of the exhaust hole 5 has multiple options, which is beneficial to enrich the diversity of the lens protection cover.

[0036] Further, the distance between the limiting surface 31 and the inner wall surface of the end cover 1 is 1mm-5mm.

[0037] Further, the distance between the limiting surface 31 and the inner wall surface of the end cover 1 is 2mm.

[0038] Further, the central region of the inner wall surface of the end cover 1 is provided with an emptying groove 11 communicating with the emptying cavity 4.

[0039] As described above, the emptying groove 11 can avoid the first lens to a greater extent, thereby further reducing the probability of the first lens being contaminated.

[0040] Further, the peripheral wall of the barrel 2 has a draft angle.

[0041] As described above, when the lens protection cover is injection molded by using a plastic material, the presence of the draft angle can facilitate the demolding of the lens protection cover, thereby facilitating the improvement of the production efficiency.

[0042] Please refer to Figure 2 and Figure 3 Embodiment one of the utility model is: lens protection cover, including connected end cover 1 and barrel 2, the end cover 1 blocks the one end opening of barrel 2, the inner peripheral wall of barrel 2 has the limiting flange 3 that protrudes to the inside, the inner side of limiting flange 3 is limiting surface 31, limiting surface 31 and the inner wall surface of end cover 1 have emptying cavity 4.

[0043] In one or more embodiments, the number of limiting flanges 3 is multiple, and the multiple limiting flanges 3 are uniformly distributed in a circle. In this embodiment, the limiting flange 3 is a continuous ring.

[0044] The end surface of the other end of the barrel 2 is provided with an exhaust hole 5, and the exhaust hole 5 communicates with the emptying cavity 4.

[0045] The exhaust hole 5 includes a first section and a second section connected in sequence, the first section is located on the side of the limiting surface 31 away from the end cover 1, the first section is a first notch provided on the inner peripheral wall of the barrel 2, the second section is a through structure on the limiting flange 3, and the through structure penetrates the opposite sides of the limiting flange 3. Optionally, the exhaust hole 5 further includes a third section communicating with the second section, the third section is provided on the inner peripheral wall of the barrel 2 and located on the side of the limiting flange 3 close to the end cover 1, and the third section is a second notch communicating with the emptying cavity 4.

[0046] The distance between the limiting surface 31 and the inner wall surface of the end cover 1 is 1mm-5mm.

[0047] Optionally, the inner wall surface of the end cover 1 is provided with an emptying groove 11 which is in communication with the emptying cavity 4.

[0048] As a preferred embodiment, the barrel 2 and the end cover 1 are integrally formed, in the embodiment, the lens protection cover is an injection molded structure, preferably, the peripheral wall of the barrel 2 has a draft angle.

[0049] In conclusion, the lens protection cover has a novel structure, the limiting surface of the limiting flange can abut against the end surface of the lens barrel of the lens assembly, when at least part of the first lens is protruded relative to the end surface of the lens barrel, the emptying cavity can effectively avoid the first lens, thereby avoiding the first lens being polluted and scratched by directly contacting the lens protection cover; during the manufacturing process of the lens assembly, the lens protection cover can well protect the lens assembly, reduce the product return rate, and does not need subsequent cleaning process, thereby improving the production efficiency and saving the production cost.

[0050] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A lens protective cover characterized by, The end cover is connected with the barrel, the end cover seals one end opening of the barrel, the inner circumferential wall of the barrel has an inwardly protruding limiting flange, the inner side of the limiting flange is a limiting surface, and the limiting surface and the inner wall surface of the end cover have an emptying cavity.

2. The lens protective cover according to claim 1, characterized by The number of the limiting flanges is multiple, and the multiple limiting flanges are uniformly distributed in a circle.

3. The lens protective cover according to claim 1, characterized by The limiting flange is in a continuous ring shape.

4. The lens protective cover according to claim 1, characterized by The end surface of the other end of the barrel is provided with an exhaust hole, and the exhaust hole communicates with the emptying cavity.

5. The lens protective cover according to claim 4, characterized in that, The exhaust hole comprises a first section and a second section connected in sequence, the first section is located on the side of the limiting surface away from the end cover, the first section is a first notch provided on the inner circumferential wall of the barrel, and the second section is a through structure on the limiting flange.

6. The lens protective cover according to claim 5, characterized in that, The exhaust hole further comprises a third section communicating with the second section, the third section is provided on the inner circumferential wall of the barrel and located on the side of the limiting flange close to the end cover, and the third section is a second notch communicating with the emptying cavity.

7. The lens protective cover according to claim 1, characterized by The distance between the limiting surface and the inner wall surface of the end cover is 1mm-5mm.

8. The lens protective cover according to claim 7, characterized in that, The distance between the limiting surface and the inner wall surface of the end cover is 2mm.

9. The lens protective cover according to claim 1, characterized by The central region of the inner wall surface of the end cover is provided with an emptying groove communicating with the emptying cavity.

10. The lens protective cover according to claim 1, characterized by The circumferential wall of the barrel has a draft angle.

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