| 摘要 |
The drive mechanism has a motor with a transmission mechanism (11) which can be coupled to a member (10) attached to the door. A driving dog (27) on the member engages positively with the transmission mechanism, and has a device (32,33) automatically uncoupling it when the resistance on opening exceeds a predetermined amount. - A manual uncoupling member is provided to allow detachment of the door from the drive mechanism in the event of power failure or in an emergency.(4) |
