Waterproof prime lens

Abstract

The waterproof prime lens comprises a lens barrel and a plurality of lenses, the plurality of lenses comprise a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object space to an image space, a joint surface of the first lens and an annular boss is provided with a first sealing ring, and a joint surface of the second lens and the annular boss is provided with a second sealing ring. A second sealing ring is arranged on the joint face of the fourth lens and the annular bearing piece, sealing rings are arranged on the contact faces of the object side lens and the lens barrel and the contact faces of the image side lens and the lens barrel, so that a waterproof closed space is formed in the lens barrel between the first lens and the fourth lens, and the effect that the two ends are waterproof is achieved. Meanwhile, technological manufacturing and characteristics of materials used by the lens are fully researched from the design of a product, the problem of water mist generated by the inner concave surface of the lens in the lens is optimized, the imaging clear effect of the lens is effectively improved, and the application range is more diversified.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lenses, in particular to a waterproof fixed-focus lens. Background Art

[0002] Optical lenses have very strict requirements for the clarity of automotive images. Especially when used in various environments with complex temperatures, condensation will form on the internal lenses of the lens, blocking the light transmission, affecting the blurring and unclear image, thus affecting the customer experience. This causes a significant decline in the optical performance of the entire lens and has a great impact on consumer use. After verification, it is confirmed that mainly water condensation beads appear on the concave surface of the internal lens of the lens, which has a very obvious impact on light transmission and is visible to the naked eye (more clearly under a microscope). This design of the utility model is different from the traditional design principle. This problem is considered during the design, and from the structural design, the failure impact of this problem is prevented to reduce / eliminate the defect of water mist generated by water condensation in the lens. This solution has been verified and confirmed to be effective through a complete simulation test. Summary of the Utility Model

[0003] The utility model provides a global navigation satellite system measurement device, which solves the problems in the prior art. The technical solution of the utility model is realized as follows: A waterproof fixed-focus lens includes a lens barrel and a plurality of lenses. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side. The second lens, the third lens, the fourth lens, and the fifth lens are installed in the lens barrel. The top of the lens barrel is a circular convex platform, and the first lens covers the convex platform. A circular bearing member extending into the interior of the barrel is provided at the bottom of the lens barrel, and the fifth lens is installed on the circular bearing member. The fourth lens, the third lens, and the second lens are sequentially arranged in the barrel of the lens barrel from bottom to top; a first sealing ring is provided at the joint surface between the first lens and the circular convex platform, and a second sealing ring is provided at the joint surface between the fourth lens and the circular bearing member.

[0004] As a preferred technical solution, spacer sheets are provided between the second lens and the third lens, between the third lens and the fourth lens, and between the fourth lens and the fifth lens; a lock cover is further included, and the lock cover presses the first lens. The second lens presses the third lens through a first spacer sheet, the third lens presses the third lens through a fourth spacer sheet, and the fourth lens presses the fifth lens through a third spacer sheet, so that a waterproof and airtight space is formed in the lens barrel between the second lens and the fifth lens.

[0005] As a preferred technical solution, an infrared filter is further provided on the image side of the lens barrel below the fifth lens.

[0006] As a preferred technical solution, an annular groove is provided on the ground of the annular boss, and the first sealing ring is placed in the annular groove.

[0007] As a preferred technical solution, both the first sealing ring and the second sealing ring are soft annular silica gel sealing rings.

[0008] As a preferred technical solution, the lock cover includes a lock portion and a fixing portion. The fixing portion is sleeved outside the lens barrel, the lock portion bends towards the inner side of the lens barrel to press the top of the first lens, and the fixing portion is fixed to the outside of the lens barrel through the wellhead structure.

[0009] As a preferred technical solution, the contact surface between the lock portion and the first lens is an arc surface adapted to the top mirror surface of the lens.

[0010] Compared with the prior art, the present solution has the following beneficial effects: Sealing rings are provided on the contact surfaces between the lenses and the lens barrel on the object side and the image side, so that a waterproof and airtight space is formed in the lens barrel between the first lens and the fourth lens, achieving the effect of waterproofing at both ends. At the same time, starting from the design of the product, the lens fully studies the process manufacturing and the material characteristics of the lens used, optimizes the water mist problem generated by the concave surface of the lens in the lens, effectively improves the imaging clarity of the lens and has a more diversified range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 FIG. 21 is a schematic structural diagram of a conventional waterproof lens;

[0013] Figure 2 FIG. 25 is a schematic structural diagram of a waterproof fixed-focus lens of the present invention.

[0014] Description of the reference numerals:

[0015] 1. First lens; 2. Second lens; 3. Third lens; 4. Fourth lens; 5. Fifth lens; 6. Lens barrel; 7. Annular boss; 81. First sealing ring; 82. Second sealing ring; 91. Lock portion; 92. Fixing portion; 10. Infrared filter; 11. Annular carrier. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solution of the present utility model will be clearly and completely described below in conjunction with 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 work shall fall within the protection scope of the present utility model.

[0017] Referring to Figure 1 , in the existing fixed-focus lens mechanism, the lens structure is assembled in a stacked manner with upper and lower single pieces and spacer pieces. There will be a certain gap between adjacent lenses during stacking. When the lens is used in an environment with a large temperature difference, water condensate is easily formed on the inner wall of the lens, resulting in the failure of the picture output. The structure of the lens in this solution is the key factor. By making full use of the optical output and combining the mechanism design with a waterproof structure, a circular silicone ring is added under the first lens and the last lens respectively to fully isolate the moisture entering the lens, so that both the front end and the rear end of the lens can effectively prevent the entry of moisture. A customized circular silicone ring is placed in the designed slot area of the lens frame, and the silicone ring is squeezed and deformed with the mechanism to form a waterproof effect.

[0018] In this embodiment, the improved structure is as Figure 2 shown: A waterproof fixed-focus lens includes a lens barrel and a plurality of lenses. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side. The second lens, the third lens, the fourth lens, and the fifth lens are installed in the lens barrel. Spacer pieces are provided between the second lens and the third lens, between the third lens and the fourth lens, and between the fourth lens and the fifth lens; a lock cover is further included, and the lock cover presses the first lens. The second lens presses the third lens through a first spacer, the third lens presses the third lens through a fourth spacer, and the fourth lens presses the fifth lens through a third spacer, so that a waterproof and airtight space is formed in the lens barrel between the second lens and the fifth lens. An infrared filter is further provided on the image side of the lens barrel below the fifth lens. The top of the lens barrel is an annular boss, and the first lens is covered in the boss. An annular carrier extending inwardly into the barrel body is provided at the bottom of the lens barrel, and the fifth lens is installed on the annular carrier. The fourth lens, the third lens, and the second lens are sequentially arranged in the barrel body of the lens barrel from bottom to top; a first sealing ring is provided at the joint surface between the first lens and the annular boss, and a second sealing ring is provided at the joint surface between the fourth lens and the annular carrier.

[0019] Among them, an annular groove is provided on the ground of the annular boss, and the first sealing ring is placed in the annular groove. Both the first sealing ring and the second sealing ring are soft annular silicone sealing rings.

[0020] Among them, the lock cover includes a lock catch part and a fixing part. The fixing part is sleeved outside the lens barrel. The lock catch part bends inward towards the lens barrel to press against the top of the first lens. The fixing part is fixed to the outside of the lens barrel through a wellhead structure.

[0021] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A waterproof fixed-focus lens, characterized in that, The lens comprises a lens barrel and a plurality of lenses, wherein the plurality of lenses comprise a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in sequence from the object side to the image side, wherein the second lens, the third lens, the fourth lens and the fifth lens are installed in the lens barrel, wherein the top of the lens barrel is an annular boss, wherein the first lens is covered in the boss, wherein the bottom of the lens barrel is provided with an annular supporting member extending toward the inside of the barrel body, wherein the fifth lens is installed on the annular supporting member, wherein the fourth lens, the third lens and the second lens are arranged in sequence from bottom to top in the barrel body of the lens barrel, wherein the joint surface between the first lens and the annular boss is provided with a first sealing ring, wherein the joint surface between the fifth lens and the annular supporting member is provided with a second sealing ring.

2. The waterproof fixed-focus lens according to claim 1, wherein, There are spacers between the second lens and the third lens, between the third lens and the fourth lens, and between the fourth lens and the fifth lens; and there is also a locking cover, the locking cover presses the first lens, the second lens presses the third lens through the first spacer, the third lens presses the third lens through the fourth spacer, and the fourth lens presses the fifth lens through the third spacer, so that the lens barrel between the second lens and the fifth lens forms a waterproof and enclosed space.

3. A waterproof fixed-focus lens according to claim 1, characterized in that, An infrared filter is also provided below the fifth lens and on the image side of the lens barrel.

4. A waterproof fixed-focus lens according to claim 1, characterized in that, The bottom surface of the annular boss is provided with an annular groove, and the first sealing ring is placed in the annular groove.

5. A waterproof fixed-focus lens according to claim 1, characterized in that, The first sealing ring and the second sealing ring are both soft annular silicone sealing rings.

6. The waterproof fixed-focus lens according to claim 2, wherein The locking cover includes a locking portion and a fixing portion, wherein the fixing portion is sleeved outside the lens barrel, the locking portion is bent toward the inside of the lens barrel to press the top of the first lens, and the fixing portion is fixed to the outside of the lens barrel through a wellhead structure.

7. The waterproof fixed-focus lens according to claim 6, wherein, The contact surface between the locking portion and the first lens is a curved surface adapted to the top mirror surface of the lens.

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