Patent ID: 6798983
Filing Date: 2004-09-28
Classification: G03B

Abstract:
A shutter device of a lens-fitted photo film unit having a shutter blade held in a position to cover an exposure opening by a bias of a spring, said shutter device comprising:a shutter drive lever for striking said shutter blade against said bias of said spring to expose said exposure opening; a speed governor for slowing down a shutter speed by acting on said shutter drive lever; wherein the speed governor, the shutter blade, and the shutter drive lever are arranged so that when the shutter drive lever is released for said exposure, the shutter drive lever initially travels at a speed unrestricted by the speed governor until the shutter blade is moved to a position in which the exposure opening is entirely exposed, and only after the exposure opening is entirely exposed is movement of the shutter drive lever slowed by the speed governor.