Device for opening and closing a window, a door, or the like

摘要

In a device for opening and closing a window, a casement is moved between a closed and open position with respect to a stationary frame. This is done by a longitudinally displaceable toothed rack, which transfers the longitudinal movement into a movement of the casement by a hinge rod. In order to obtain a device which is easy to operate, it is proposed that in addition to the first toothed rack co-operating with the casement, a second toothed rack is provided in the frame which changes closing elements located on the frame between a latched position holding the casement and an unlatched position releasing the casement, by a closing rod. Although both toothed racks are longitudinally displaced by the same actuating element, as a rule only one of the two toothed racks is coupled to the actuating means while the other is uncoupled and stationary. The currently coupled toothed rack uncouples itself automatically after a specific distance of travel and the final phase of its longitudinal displacement is used to couple the other toothed rack to the actuating element.