Telescopic mechanism of projector lens

The utility model belongs to the technical field of projection equipment, and particularly relates to a telescopic mechanism of a projector lens, which comprises a projector main body, a lens is arranged on the projector main body, a telescopic shell is connected inside the lens in a sliding manner, a lens seat is fixedly connected onto the telescopic shell, a protective shell is connected to the outer side of the lens seat through threads, and the protective shell is connected with a camera. A limiting mechanism is arranged on the lens, an air cylinder is arranged on the projector body, and a connecting block is fixedly connected to the telescopic shell. By arranging the guide groove, the limiting nail and other components, the telescopic shell can be guided and limited when moving, the telescopic shell is more stable when moving, by arranging the limiting sleeve, the limiting groove and other components, the limiting sleeve can limit and protect the limiting nail, the phenomena such as rusting of the limiti