Patent ID: 6390691
Filing Date: 2002-05-21
Classification: G03B

Abstract:
A focal-plane shutter for a camera comprising: a base plate for connection to a body of a camera having a rear cover which can be opened and closed during a film replacement operation, the base plate having a shutter opening; an opening sector group having a plurality of sectors for undergoing opening movement in an operational state to open the shutter opening during a shutter release operation; a closing sector group having a plurality of sectors for undergoing closing movement in an operational state to close the shutter opening during the shutter release operation; control means for controlling the opening sector group and the closing sector group to open and close the shutter opening, respectively; holding means for holding the closing sector group at a nonoperational position during an opening state of the rear cover of the camera and for releasing the hold of the closing sector group in the nonoperational position during a closing state of the rear cover of the camera; and means for preventing opening of the rear cover of the camera before setting of the shutter.