ADAPTER FOR CONNECTING A WINDSCREEN WIPER BLADE TO A DRIVING ARM

Adapter (26, 26') for connecting a wiper blade (12) to a drive arm (14), the adapter (26, 26') having a "U"-shaped section formed by a base and two flanks (42a, 42b) delimiting a housing (45), in which: - at least one of the flanks (42a) is formed by at least two walls (42aa, 42bb) separated from each other by at least one cavity (63, 64), and - at least one protrusion (60) is connected to at least one of the walls (42aa, 42ab, 42ba, 42bb) and extends at least partly inside said housing (45).