Patent ID: 8047661

Claim:
A height adjustment apparatus for a projector, the projector comprising a front wall and a bottom wall substantially perpendicular to the front wall, the front wall defining a first opening, and the bottom wall defining a second opening and a protruding portion extending from an inner surface of the bottom wall, the height adjustment apparatus comprising: a lifting member comprising a supporting portion and an engaging portion located at two ends of the lifting member respectively, the engaging portion for being pivotably connected to the protruding portion, the supporting portion for being rotated out of the second opening, the engaging portion having a toothed end surface, the toothed end surface comprising a plurality of teeth; and an operation member comprising a receiving frame and an operating portion, the receiving frame for receiving the engaging portion and the protruding portion therein, the operating portion being secured to an end of the receiving frame for facing the front wall and being movably received in the first opening, the receiving frame having a latching portion, the latching portion extending from an inner surface of the receiving frame and facing to the operating portion, the latching portion latching with the teeth of the lifting member.