Power transmission apparatus for electric bending endoscope

An electric bending endoscope comprising a power transmission apparatus,

• the power transmission apparatus including:
• a power transmission mechanism to transmit power;
• a clutch mechanism switchable between a connection state to permit the transmission of the power by the power transmission mechanism and a release state not to permit the transmission of the power by the power transmission mechanism;
• an actuating member switchable between a connection position to bring the clutch mechanism into the connection state and a release position to bring the clutch mechanism into the release state, the actuating member being interlocked with the clutch mechanism;
• an electric drive mechanism electrically switchable between a connection drive state to bring the actuating member into the connection position and a release drive state to bring the actuating member into the release position, the electric drive mechanism being interlocked with the actuating member;
• and
• a manual drive mechanism including an operation member manually switchable to at least one of a connection drive position to bring the actuating member into the connection position and a release drive position to bring the actuating member into the release position, and a selective actuation transmission mechanism provided between the operation member and the actuating member and to transmit the actuation of the operation member to the actuating member and absorb the actuation of the actuating member without transmitting the actuation to the operation member.