Abstract: Drive assembly for door and window frames, comprising at least one actuating member and at least one transmission rod fastened to the actuating member, The transmission rod comprises a central portion and two lateral portions positioned at opposite sides relative to the central portion and forming two channel-shaped longitudinal guides, the central portion having a longitudinal groove positioned between the longitudinal guides, the longitudinal groove of the central portion being closed by a base. The transmission member has a connecting portion including two longitudinal ribs with ends shaped in such a way as to establish a telescopic coupling with the longitudinal guides of the transmission rod and a central portion positioned between said ribs and provided with a threaded hole in which is inserted a screw having a tip that is able to cut a hole in the base of the transmission rod at said longitudinal groove.

Abstract: A transmission rod for accessories for windows and doors, comprising a first and a second end (34, 36) provided with respective connecting means (38, 40). The transmission rod comprises a first elongated element (30) bearing said first end (34) and a second elongated element (32) bearing said second end (40). The first and the second elongated element (30, 32) can be mutually fastened in a plurality of selected positions corresponding to a plurality of effective lengths (L1-L2) of the transmission rod (28).