Patent ID: 6822809
Filing Date: 2004-11-23
Classification: G02B

Abstract:
A drive transmission device for transmitting drive of an actuator to a driven member, the drive transmission device comprising:an input member which is driven by the actuator, the input member having an input contact surface; and an output member which transmits drive of the input member and drives the driven member, the output member having an output contact surface; wherein the drive transmission device is switchable between a first state in which the drive of the input member is transmitted to the output member and a second state in which the drive of the input member is not transmitted to the output member, the input contact surface and the output contact surface are in contact with each other when the drive transmission device is in the first state and in the second state, and a contact pressure between the input contact surface and the output contact surface in the first state is larger than a contact pressure therebetween in the second state.