Lens protector

Abstract

The invention provides a lens protector which is arranged on a shell of an optical device and used for an opening part where a lens is exposed. The lens protector comprises a main body and a fitting piece, wherein the main body is provided with a ring-shaped outer circumferential surface and an inner circumferential surface concentric with the outer circumferential surface; the fitting piece is provided with a ring-shaped outer circumferential surface; the main body is provided with a first buckling part, and the fitting piece is provided with a second buckling part; when the main body is matched with the fitting piece by the buckling between the first buckling part and the second buckling part, the outer circumferential surface of the fitting piece is opposite to the inner circumferential surface of the main body. when lenses with different sizes are arranged in the same shell, the lens protector can properly deal with the situation. Furthermore, the invention also provides a structure for preventing vibration sound, thus preventing the vibration sound caused by the looseness between the main body and the fitting piece.

Description

technical field [0001] The present invention relates to a lens-guard for an optical device, in particular to a lens-guard for a lens of a projector. Background technique [0002] Projectors are used more and more in daily life and production. Most of the projectors currently on the market are equipped with a ring-shaped lens protector, which is installed on the upper casing that constitutes the projector casing. Between the lower casing and the front of the lens, it serves to connect the upper and lower casings of the projector, and blocks the line of sight entering from the lens opening of the casing, preventing the user from seeing the internal structure of the projector and causing a sense of clutter. Moreover, a flange or a groove is usually formed on the front side of the annular inner wall of the lens protector so that the lens cover can be snapped onto the lens protector. [0003] The lens protectors currently used in commercially available projectors are all single ...

AI Technical Summary

Problems solved by technology

[0005] However, this solution has the following problems: as mentioned above, a flange (or groove) needs to be formed on the front side of the lens protector to install the lens cap, and a cone shape needs to be formed on the rear side, but this is difficult to achieve in casting. of

Therefore, the above solutions can hardly be considered in actual production

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