Adapter for a motor vehicle windscreen wiper

1. 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;

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; and

an adapter head integral to the adapter and having a lateral dimension and height greater than those of the adapter body, the adapter head comprising a rear face that forms a bearing face of a front end of one of the first end piece and the second end piece,

wherein the blocking means comprise at least one retaining hook configured to collaborate with the said first end piece.

2. The adapter according to claim 1 , in which the said at least one retaining hook is configured to collaborate by elastic snap fastening with the said first end piece.

3. The adapter according to claim 1 , in which the at least one retaining hook is configured to keep the said first end piece substantially bearing against a first surface of the transverse wall.

4. The adapter according to claim 3 , in which the transverse wall comprises a second bearing wall configured to collaborate with the second end piece, the first and second bearing surfaces being inclined with respect to one another.

5. The adapter according to claim 1 , in which the transverse wall comprises a depression configured to accept part of the first end piece.

6. The adapter according to claim 5 , in which the depression comprises a wall or at least a bottom edge which is substantially parallel to the axis and which is configured to define a first bearing surface of the said first end piece.

7. The adapter according to claim 6 , in which the first bearing surface is inclined with respect to an axis of elongation of the adapter.

8. The adapter according to claim 6 , in which the first bearing surface is situated at a longitudinal end of the body which end is connected to a cowling.

9. The adapter according to claim 1 , in which a first of the longitudinal walls comprises a first projecting bearing and guidance rib through which the orifice passes and which is configured to collaborate with a shoulder of the said cylindrical rod, the first rib extending all around the periphery of the orifice.

10. The adapter according to claim 9 , in which a second of the said longitudinal walls comprises a second projecting bearing and guidance rib configured to collaborate with the first end piece.

11. The adapter according to claim 9 , in which each of the first and second walls comprises several projecting bearing and guidance ribs.

12. The adapter according to claim 11 , in which the ribs on the first wall are symmetrical with the ribs of the second wall about a median longitudinal plane of the adapter substantially perpendicular to the axis.

13. The adapter according to claim 1 , in which the body comprises elastically deformable means for elastic snap-fitting.

14. An assembly comprising an adapter according to claim 1 and a driving arm, for a motor vehicle windscreen wiper.

15. An assembly comprising an adapter according to claim 1 and a blade for a motor vehicle windscreen wiper.

16. 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.

17. The adapter according to claim 16 , in which the elastically deformable means are situated at a level of a first bearing surface and are configured to be moved by elastic deformation by the first end piece when the first end piece bears against the first bearing surface.

18. The adapter according to claim 16 , in which the elastically deformable means are configured to be situated in a vicinity of a component of the blade and comprises at least one edge which is intended to be situated on a side of the said component and which is configured to extend at least in part around the said component when the said elastically deformable means are elastically deformed.

19. The adapter according to claim 18 , in which the at least one edge has a concave curved shape.