Patent ID: 8837030
Filing Date: 2014-09-16
Classification: G03B

Abstract:
1. A blade drive device comprising: a board including an opening; a first blade movable toward and away from the opening, and including: a first slot and first and second aperture openings each of which is smaller than the opening; a second blade movable toward and away from the opening and including a second slot; a pin-shaped connection member rotatably and directly connecting the second blade with the first blade; a first drive member including a first drive pin that engages the first slot and that is rotatable about a predetermined position; and a second drive member including a second drive pin that engages the second slot and that is rotatable about a predetermined position, wherein when the second drive pin rotates in one direction in a closed state where both of the first and second aperture openings overlap the opening, the second blade reciprocates between a position where the second blade covers only the first aperture opening and a position where the second blade covers only the second aperture opening.