a projector

Abstract

The invention discloses a projector, which comprises a shell with a lens hole, a lens seat arranged in the shell, a projection lens and a positioning mechanism, wherein a clamping part and a limiting part are arranged on the lens seat; one end of the limiting part is connected with a return spring, so that the limiting part can move relative to the lens seat; one end of a lens barrel of the projection lens is provided with a matching part and is provided with a limiting groove; the matching part is matched with the clamping part so as to fix the projection lens on the lens seat; the other end of the lens barrel of the projection lens extends out of the lens hole; the limiting part is positioned by the positioning mechanism, so that the limiting part and the limiting groove are clamped or separated; the positioning mechanism is pushed to compress the return spring, so that the limiting part is separated from the limiting groove; and when one end of the lens barrel is arranged on the lens seat and is rotated to be clamped with the matching part and the clamping part, the projection lens is fixed on the lens seat, the positioning mechanism is loosened, and the return spring resets, so that the limiting part is clamped with the limiting groove. According to the projector, the projection lens is conveniently replaced, the shell does not need to be detached, inner parts are not damaged, and the projection lens and the lens seat are reliably connected.

Description

【Technical field】 [0001] The invention relates to the technical field of projection, in particular to a projector. 【Background technique】 [0002] An optical lens is required in the optical path of the projector to realize imaging. This lens also functions to enlarge the image, adjust focus, and focus while imaging. The focal length of the projector lens determines the size of the image that the projector lens can form under the condition of a certain distance between the projector and the screen. The shorter the focal length of the projector lens, the larger the projected image on the screen. Conversely, the longer the focal length, the smaller the image projected on the screen. If you want to project a large picture in a short distance, you need to choose a projector with a short-focus lens, otherwise you need to choose a long-focus lens. General projectors have standard lenses. However, when the application space is relatively narrow or wide, it is difficult to obtain...

AI Technical Summary

Problems solved by technology

The way of screw connection is not firm enough and easy to loosen. When the projection lens is frequently replaced, it is easy to cause the projection lens to fall off

And the threaded connection has no limit function. When the projector is working, the lens may rotate due to accidents and affect the projection effect.

In addition, the projection lens of a general projector is installed inside the casing. When replacing the projection lens, it is first necessary to open the casing and then replace it. The operation is cumbersome.

Moreover, there are sophisticated optical devices and electronic devices inside the casing of the projector, and it is easy to damage the components inside the casing when the casing is often opened.

Therefore, the replacement of the speculative lens of the existing interchangeable lens projector is comparatively loaded down with trivial details and reliability is relatively poor

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