Patent ID: 7637675

Claim:
A shutter device comprising: a first-curtain blade driving member having a contact portion and configured to drive a first-curtain blade group; a second-curtain blade driving member having a contact portion and configured to drive a second-curtain blade group; a first cam gear having a first cam surface contacting the contact portion of the first-curtain blade driving member and a second cam surface contacting the contact portion of the second-curtain blade driving member, a rotation of the first cam gear causes each contact portion of the first-curtain blade driving member and the second-curtain blade driving member to drive for shutter charge and release operations; a mirror driving member configured to drive a quick return mirror; and a second cam gear configured to displace the mirror driving member to a first position and a second position, the second cam gear connected to the first cam gear, the second cam gear and the first cam gear are driven simultaneously, wherein rotation of the first cam gear successively realizes a first phase, a second phase, and a third phase, wherein the first phase includes a state where the first cam surface contacts the contact portion of the first-curtain blade driving member, a state where the second cam surface contacts the contact portion of the second-curtain blade driving member, and a state where the second cam gear displaces the mirror driving member to the first position, wherein the second phase includes a state where the first cam surface does not contact the contact portion of the first-curtain blade driving member according to rotation of the first cam gear, a state where the second cam surface contacts the contact portion of the second-curtain blade driving member, and a state where the second cam gear displaces the mirror driving member to the second position, and wherein the third phase includes a state where the first cam surface does not contact the contact portion of the first-curtain blade driving member according to rotation of the first cam gear, a state where the second cam surface does not contact the contact portion of the second-curtain blade driving member according to rotation of the first cam gear, and a state where the second cam gear displaces the mirror driving member to the second position.