Patent ID: 8905552

Claim:
A dust-proof structure of a projector, the dust-proof structure comprising: a circuit board; an air diversion panel positioned on the circuit board; and a color wheel module positioned above the air diversion panel; the color wheel comprising: a color wheel; and a motor comprising an axle engaged with the color wheel, wherein the color wheel is synchronized with the rotating motion of the motor and the axle; the air diversion panel comprising an air guiding surface surrounding the circumferential surface of the motor and an bottom surface opposite to the air guiding surface, an air pathway being formed between the air guiding surface and the circumferential surface of the motor, the air guiding surface comprising: a flat surface opposite to the circuit board; and an arc surface extending from the flat surface away from the circuit board; the air diversion panel defining: an opening through the flat surface and the bottom surface; a dust exit through the act surface and the bottom surface; and a dust collecting trough in the flat surface, wherein the dust exit, the opening, and the dust collecting trough are arranged along a circumferential direction and a rotating direction of the motor; wherein the circuit board ends between the opening and the dust exit, the dust exit is unblocked by the circuit board, the circuit board comprises a sensor placed in the opening.