Patent ID: 7517097

Claim:
A sliding lens cap adapted for covering and uncovering a lens unit of a projector, said sliding lens cap comprising: a slide plate formed with a slide track unit, said slide plate having an inner surface adapted to be disposed to confront said projector, and an outer surface opposite to said inner surface; and a fixing member adapted to be mounted on said projector adjacent to said lens unit and in sliding engagement with said slide plate at said slide track unit to permit slidable retention of said slide plate on said projector and to permit movement of said slide plate between a covering position and an uncovering position relative to said lens unit; wherein said slide track unit includes a first track slot and a second track slot formed through said outer and inner surfaces of said slide plate, said second track slot being parallel to said first track slot, said slide track unit further including a slide rail formed between said first and second track slots; wherein said fixing member having a first mounting segment and a second mounting segment adapted to be mounted on said projector, and a restricting segment connected to said first and second mounting segments and extending through said first and second track slots, said restricting segment abutting against said outer surface of said slide plate; wherein said slide rail is formed with a rail groove at said outer surface of said slide plate, said rail groove extending parallel to said first and second track slots, said slide rail having first and second positioning units provided at opposite groove end portions of said rail groove, respectively, said sliding lens cap further comprising a positioning member connected to said restricting segment of said fixing member and disposed in said rail groove, said positioning member engaging removably said first positioning unit to position releasably said slide plate at said covering position, and engaging removably said second positioning unit to position releasably said slide plate at said uncovering position; and wherein said rail groove has a groove axis, each of said first and second positioning units including a pair of recesses formed in said slide rail and disposed respectively at opposite sides of said groove axis, said positioning member having a pair of resilient arms for engaging removably and respectively said recesses of said first and second positioning units.