Windscreen wiper arm, particularly for automobiles
A windscreen wiper arm, particularly for automobiles, that is able to oscillate upwardly and downwardly between a downward position and an upward position. One end of the windscreen wiper arm is adapted to be pivotally connected to a mounting head mounted on a drive shaft. Another end of the windscreen wiper arm is rigidly connected to an adapter adapted to be connected to an elongated wiper blade to be placed in abutment with a windscreen to be wiped. A joint part is adapted to be interposed between the adapter and the elongated wiper blade. The adapter, at the location of its connection to the wiper blade, has a U-shaped cross-section with a base and two spaced-apart legs. The windscreen wiper arm is provided with a nozzle for spraying a washing liquid onto the windscreen to be wiped. The nozzle is detachably connected to the adapter. At least one protrusion of the nozzle engages into a corresponding hole in one of the legs of the U-shaped cross-section of the adapter. The protrusion extends inwardly in a direction towards the adapter. The protrusion has a shank passing through the hole, and an enlarged head abutting an inner wall of the leg provided with the hole. The joint part is provided with a slit in which the enlarged head rests for blocking any movement of the protrusion in a direction towards the windscreen to be wiped and in a direction away from the windscreen to be wiped.
1. A windscreen wiper arm comprising:
an adapter adapted to be connected to an elongated wiper blade to be placed in abutment with a windscreen to be wiped, wherein said adapter, at a location of its connection to the wiper blade, has a U-shaped cross-section with a base and two spaced-apart legs;
a joint part adapted to be interposed between said adapter and the elongated wiper blade;
a nozzle for spraying a washing liquid onto the windscreen to be wiped, wherein said nozzle is detachably connected to said adapter, wherein at least one protrusion of said nozzle engages into a corresponding hole in one of said legs of said U-shaped cross-section of said adapter, said protrusion extending inwardly in a direction towards said adapter, said protrusion having a shank passing through said hole, and an enlarged head abutting an inner wall of said leg provided with said hole, and wherein said joint part includes a slit in which said enlarged head rests for blocking any movement of said protrusion in a direction towards the windscreen to be wiped and in a direction away from the windscreen to be wiped.
2. The windscreen wiper arm according to claim 1 , wherein said slit extends in a longitudinal direction.
3. The windscreen wiper arm according to claim 1 , wherein said joint part has a U-shaped cross-section with a base facing towards said base of said U-shaped cross-section of said adapter, and with legs each facing one of said legs of said U-shaped cross-section of said adapter, and wherein said slit is provided inside one of said legs of said U-shaped cross-section of said joint part facing towards one of said legs of said U-shaped cross-section of said adapter that is provided with said hole.
4. The windscreen wiper arm according to claim 1 , wherein said hole in said adapter comprises a slot having an enlarged hole, a reduced hole, and a restricted neck interconnecting said enlarged hole and said reduced hole, wherein said slot and said protrusion are arranged to be relatively movable via said restricted neck between a first position, wherein said protrusion passes through said enlarged hole with play and a second position wherein said protrusion passes through said reduced hole under deformation.
5. The windscreen wiper arm according to claim 4 , wherein said protrusion is arranged to pass through said reduced hole under elastic deformation in order to be snapped inside said reduced hole.
6. The windscreen wiper arm according to claim 4 , wherein said protrusion includes an inner hole.
7. The windscreen wiper arm according to claim 4 , wherein in said first position, said shank passes through said enlarged hole with play, and in said second position, said shank passes through said reduced hole under deformation, and wherein said enlarged head abuts an inner wall of said reduced hole.
8. The windscreen wiper arm according to claim 4 , wherein said enlarged hole and said reduced hole comprise blind holes.
9. The windscreen wiper arm according to claim 4 , wherein said enlarged hole and said reduced hole comprise through holes.
10. The windscreen wiper arm according to claim 4 , wherein one of said legs of said U-shaped cross-section of said adapter comprises two slots, and wherein said nozzle comprises two corresponding protrusions extending inwardly in a direction towards said adapter.
11. The windscreen wiper arm according to claim 1 , wherein said nozzle is detachably connected to said adapter at a lateral side of the windscreen wiper arm in use facing towards an upward position.
12. The windscreen wiper arm according to claim 1 , wherein said nozzle is detachably connected to said adapter at a lateral side of the windscreen wiper arm in use facing towards a downward position.
13. The windscreen wiper arm according to claim 1 , wherein said nozzle comprises a plastic material.
14. The windscreen wiper arm according to claim 1 , wherein said adapter comprises a metal material.
15. The windscreen wiper arm according claim 1 , wherein said U-shaped cross-section of said adapter is mounted offset in a plane of said base relative to a longitudinal axis of the windscreen wiper arm.
16. The windscreen wiper arm according to claim 1 , wherein a cap is detachably connected to said nozzle.