Patent ID: 8459882
Filing Date: 2013-06-11
Classification: G03B

Abstract:
1. In a camera shutter for settling a closing blade to a preset value in a predetermined position prior to starting of shutter operation, starting an exposure operation by an opening blade, and further terminating an exposure by displacing a closing blade to a closing position, a camera shutter comprising: a first drive member operating said opening blade; a first hook holding said first drive member in a charged position; a closing member operating said closing blade to a position closing a shutter opening; a second drive member displacing said closing blade to position closing a shutter opening by operating said closing member; a second hook holding by directly engaging said second drive member in a charged position; a magnet controlling operative timings between said first and second hooks by moving between an operating and a rest position; wherein by said magnet controlled in connection with a releasing operation of the shutter, displaces said second hook from rest position to charged position while the first drive member maintains an arrangement between the second drive member and the second hook by contacting the second drive member and thereafter releases said first drive member in connection with operating said first hook, and thereby starts the exposure operation by making said opening blade operate, and wherein after a lapse of predetermined time, by said magnet releases the hooking between said second hook and said second driving member and then said closing member is operated by said second driving member so that an exposure operation terminates in connection with displacing said closing blade to the closing position thereof.