Drive assembly for door and window frames

A drive assembly for door and window frames, comprising at least one actuating member and at least one transmission rod fastened to the actuating member, wherein:

• 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 opening in a direction away from the actuating member positioned between the longitudinal guides, the longitudinal groove of the central portion being closed by a base, the central portion of the transmission rod comprises two longitudinal ribs connecting the base to the lateral portions, the central portion having moreover two lateral extensions extending externally beyond the longitudinal ribs,
• the actuating member has a coupling portion including two longitudinal ribs with ends shaped in such a way as to establish a telescopic coupling with said 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 threaded body adapted for coupling with said threaded hole and a tip, that is able to cut a hole in the base of the transmission rod at said longitudinal groove, said tip protruding axially away from the threaded body and being non-threaded, and wherein the longitudinal ribs of the actuating member have respective inner lateral extensions, the lateral extensions of the transmission rod and the inner lateral extensions of the actuating member have respective surfaces that come into contact upon tightening of said screw.