Patent ID: 11895388
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. The shutter unit according to claim 1, further comprising;
a second blade member configured to be movable between a closed state in which the second blade member closes the opening and a retracted state in which the second blade member retracts from the opening, and to transition from the retracted state to the closed state during an exposure operation;
a third driving member configured to be movable integrally with the second blade member and to be biased by a third biasing member in a direction such that the second blade member moves from the retracted state to the closed state;
a third charging member configured to cause the third driving member to move against a biasing force on the third driving member of the third biasing member; and
a fourth charging member configured to be connected to the second charging member and the third charging member and to cause the first charging member to operate,
wherein a number of teeth of the fourth charging member is an integral multiple of a number of teeth of each of the second charging member and the third charging member.