| 摘要 |
PURPOSE:To cool the periphery of a lamp directly without waiting for the operation of a fan driving motor by coupling a cooling fan with a rolling body which rolls on a linear state member in the moving direction of an optical system through a power transmitting means. CONSTITUTION:Gears 11-1 and 11-2 are fitted onto axes 6-1 and 6-2 through a one-way clutch. When a mount 10 and a lamp fitting base 4 move to right, a rubber roller 801 is driven to rotate clockwise. A gear 12-2, on the other hand, is rotated clockwise and a gear 13 rotates in the same direction through the axis 6-2 and one-way clutch to rotate pinions 15 and 17 counterclockwise, thereby rotating a flywheel 9 counterclockwise through axes 14 and 16. When the mount 1 moves in the opposite direction, they operate similarly. When the mount 10 stops, the fan 1 is inhibited from rotating because of the one-way clutch between the gear 13 and axis 6-2, thereby carrying on the rotation through the inertial rotation of the flywheel 27. |
