Patent ID: 8974129
Filing Date: 2015-03-10
Classification: G03B

Abstract:
1. A barrier device comprising: a first shielding member configured to be shifted between a closed state in which a lens is shielded and an open state in which the lens is exposed; a second shielding member configured to be shifted between the closed state and the open state; and a driving member configured to drive the first shielding member to be shifted to the closed or open state, wherein in a case where the first and second shielding members are shifted between the closed state and the open state, the first and second shielding members are rotated in opposite directions, wherein the first shielding member has a first tip portion, a first matching surface, and a first contacting portion, wherein the second shielding member has a second tip portion, a second matching surface, and a second contacting portion, wherein in a case where the first and second shielding members are in the closed state, (a) the first contacting portion contacts the second contacting portion and (b) the second tip portion contacts the first matching surface, wherein in a case where the first and second shielding members are shifted from the closed state to the open state, the first tip portion pushes the second matching surface in a state that the first contacting portion is overlapped with a part of the second shielding member, and wherein in a case where the first and second shielding members are in the open state, (a) the first tip portion contacts the second matching surface and (b) the first contacting portion is overlapped with the second tip portion.