| 摘要 |
An apparatus for electrically rotating a shutter's axis to fold and unfold said shutter Is disclosed. The apparatus comprises an electrical motor, a gear that is driven by the motor, wherein the gear is connected to rotatable adapting unit or a flange connected to the shutter's axis. The apparatus can also include two switches, each switch stopping the motor when depressed and located in both ends of a rail, wherein an element is installed in the rail capable to move along the rail and the element depress one of these switches when arriving to any end of the rail, a circular plate with a spiral tunnel grooved on its surface, wherein the circular plate Is joined to the rotate-able adapting unit or flange; and a pin installed on the element and Is settled in the grooved tunnel, moving the element along the rail according to the rotation of the plate. |
