Adapter for a motor vehicle windscreen wiper

An adapter for a motor vehicle windscreen wiper, the adapter being configured to connect a wiper blade to a first end piece of a first driving arm via lateral locking and secured to a cylindrical rod defining an axis of articulation of the adapter with respect to the blade, as well as a substantially U-shaped second end piece of a second driving arm, the adapter comprising:

• a longitudinal body comprising first and second lateral longitudinal walls that are substantially parallel and connected together by a transverse wall, the longitudinal body comprising at least one through-orifice configured to accommodate the said cylindrical rod;
• and
• rotation blocking means configured to collaborate with the first end piece in order to secure the latter and the adapter in terms of rotation about the said axis,
• the longitudinal body further comprising elastically deformable means with a lateral push button for elastic snap-fitting, the lateral push button being configured to interact with a notch of the second end piece,
• wherein the blocking means comprise at least one retaining hook configured to collaborate with the said first end piece, wherein the retaining hook comprises a vertical wall and a lateral protrusion extending from an uppermost portion of the vertical wall, and
• wherein the retaining hook is configured to extend over a portion of the first end piece, and configured to restrict the first end piece movement in a first direction perpendicular to the axis of articulation, and in a second direction perpendicular to the first direction.