Short-focus lens for projector

Abstract

The invention relates to the technical field of short-focus lenses, in particular to a short-focus lens for a projector, which comprises a projector body, a controller is arranged on the outer surface of one side of the projector body close to the left edge, and a lens piece is fixedly mounted on the outer surface of one end of the projector body close to the middle. A lens is fixedly installed on the outer surface of the right end of the lens piece close to the middle position, and an auxiliary mechanism is arranged on the side, close to the lens, of the outer surface of the right end of the lens piece. According to the invention, through the arrangement of the auxiliary mechanism, fog on the lens can be simply and quickly removed when needing to be treated, so that the problem that the fog is frequently generated on the lens of the projector body and the definition of the projector body during projection is influenced due to large temperature difference between inside and outside in winter is avoided; the watching experience of people and the teaching effect are ensured, and the overall practicability is improved.

Description

technical field [0001] The invention relates to the technical field of short-focus lenses, in particular to a short-focus lens for projectors. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play the corresponding video signal. Projectors are widely used in homes, offices, schools, and entertainment venues. According to different working methods, there are different types such as CRT, LCD, and DLP. [0003] At present, with the development of the times, people's living standards are constantly improving, and people's requirements for the teaching environment are getting higher and higher, and projectors are also widely used in education and teaching. [0004] In the prior art, during the use of the projector, a layer of fog is generated on the lens of the projector due to the temperature di...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, during the use of the projector, a layer of fog is generated on the lens of the projector due to the temperature difference between the inside and outside, especially in winter when the temperature difference between the inside and outside is large, resulting in frequent occurrence of fog on the lens of the projector, and the existence of fog The time is longer, which affects the clarity of the projector when it is projected, interferes with it, is not convenient for people to watch, thus affects people's viewing experience, and reduces the effect of teaching. At the same time, because most projector lenses are directly It is exposed to the air, so the dust in the air will inevitably fall on the surface of the lens. If the dust on the lens is not removed in time, the clarity of the projected picture will be affected to some extent.

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