Patent ID: 8057050

Claim:
A height adjustment apparatus for a projection device, the projection device comprising a housing comprising a front plate and a bottom plate substantially perpendicular to the front plate, the bottom plate defining a first opening therein, and the front plate defining a second opening therein, the height adjustment apparatus comprising: a socket located on an inner surface of the bottom plate and covering the first opening, the socket defining a third opening therein corresponding to the first opening and comprising a locating portion; an engaging member comprising a main portion, an engaging portion, a deformable portion, and a movable portion, the main portion defining a fourth opening therein and passing through the second opening so that the fourth opening aligns with the third opening, the engaging portion being formed on the periphery of the fourth opening, the movable portion being retained by the locating portion, the deformable portion being a flexible frame integrally formed with and connecting the main portion and the movable portion; and a lifting member comprising an upright lifting portion passing through the first, third and fourth openings and defining a toothed face capable of being engaged by the engaging portion, the deformable portion being capable of being deformed when the engaging member is pressed towards the locating portion and thereby disengaging from the toothed face, allowing the housing to be elevated or lowered.