| 摘要 |
Motorized operating device intended for operating a movable screen with a windable canvas of a window covering device or of a projection screen device, the motorized operating device being intended to be suspended by the canvas and including: a winding tube which is movable around a first axis and on which the canvas is intended to be wound, an actuator which is disposed at least in part in the tube, a first element for fixing a first end of the canvas to the winding tube, the weight of the operating device creating a canvas unwinding torque, wherein said operating device includes an element for compensating the unwinding torque which acts exclusively by interaction with gravity and/or with the canvas. |
