Actuator for opening and/or closing a moveable leaf, in particular of a door or window

摘要

The drive has an output shaft which is operatively connected to the movable leaf by a force transmission element (8). The force transmission element is provided with a guide element (11) which is guided slidably in a guide rail (9). The guide element is provided with rolling elements (12,13), and the guide rail is provided with two separate contact surfaces (19,20) for rolling elements of guide element.