Adapter for the articulated connection of a connecting element at the end of a wiper arm to a connector element of a wiper blade

An adapter (22) for the articulated connection of a connecting element (86, 102, 120) at the end of a wiper arm to a connector element (18) of a wiper blade (10), wherein the adapter (22) has a base element (24), characterized in that

• the base element (24) has two lateral walls (30) which, at end faces thereof facing away from the wiper arm, are connected by an end cap (26), and in a region of upper edges (64) thereof are connected to each other by a crosspiece (32) and also by a hub (34),
• a resilient tongue (38) extends from the crosspiece (32) to an end face on a wiper arm side and has at a free end thereof an outwardly protruding button (40),
• guide profiles (50) are provided on longitudinal edges of the lateral walls (30) facing towards the wiper strip (16),
• during assembly the button (40) actuates a blocking element (42) such that an improper assembly is prevented by said blocking element, and
• the button (40) has a slider (42) as the blocking element on a wiper arm side thereof, which protrudes laterally over the button (40) and is guided along front edges (44) of the lateral walls (30) in an elastically pliable manner.