Patent ID: 8356949
Filing Date: 2013-01-22
Classification: G03B

Abstract:
1. A focal plane shutter comprising: a board including an opening; a blade movable between a position where the blade recedes from the opening and a position where the blade covers at least part of the opening; a drive arm connected to the blade, the drive arm including an engagement hole; a drive lever including a drive pin engaging the engagement hole; and a restriction portion provided in the drive arm, the restriction portion abutting the drive pin and being thicker than the drive arm, wherein the engagement hole includes a first edge positioned at a start side where the drive pin moves in a predetermined direction and a second edge positioned at a terminal side where the drive pin moves in the predetermined direction, and the restriction portion allows an abutment of the second edge with the drive pin, and abuts the drive pin to restrict an abutment of the first edge with the drive pin.