Patent ID: 9134588
Filing Date: 2015-09-15
Classification: G03B

Abstract:
1. A stop apparatus comprising: a stop operation member; a plurality of stop blades each provided with a pivot and a driving pin; a blade supporter that supports the stop blades so that the stop blades are rotatable about the pivots of the respective stop blades; a first cam member provided with a first cam groove that engage the driving pins of the respective stop blades; a second cam member provided with a second cam groove having a shape different from the first cam groove; and a driving force transmission member that transmits rotational driving force of the stop operation member to the second cam member, wherein at least one of the driving pins engages with both the first cam groove and the second cam groove, and wherein part of the rotational driving force transmitted from the driving force transmission member to the second cam member is transmitted to the first cam member through the second cam member to rotationally drive the first cam member.