1. Field of the Invention
The invention relates to a lens cap, more particularly to a sliding lens cap for a lens unit of a projector.
2. Description of the Related Art
As shown in FIG. 1, a conventional lens cap 10 for covering and uncovering a lens unit 101 of a projector 100 is connected by a cord 11 to a housing of the projector 100 so that the lens cap 10 can be prevented from being misplaced when the lens cap 10 is removed from the lens unit 101. When operating the projector 100, the lens cap 10 is removed from the lens unit 101 and is suspended from the housing by the cord 11. After using the projector 100, the lens cap 10 is replaced on the lens unit 101 to cover the same. To retain the lens cap 10 covering the lens unit 101, the lens cap 10 is provided with an engaging mechanism to engage removably a periphery of the lens unit 101 such that a force is required to disengage the lens cap 10 from the lens unit 101, which results in inconvenience. Moreover, if an operator forgot to remove the lens cap 10 before operating the projector 100, the lens cap 10 will be subjected to a strong light from the projector 100 that can melt the lens cap 10.