Windscreen wiper device
View Patent ↗A windscreen wiper device comprising an elastic, elongated carrier element, as well as an elongated wiper blade of a flexible material, which can be placed in abutment with a windscreen to be wiped, which wiper blade includes opposing longitudinal groove on its longitudinal sides, in which grooves spaced-apart longitudinal strips of the carrier element are disposed, wherein neighboring ends of said longitudinal strips are interconnected by a respective connection piece, which windscreen wiper device comprises a connecting device for an oscillating arm, wherein said oscillating arm is pivotally connected to said connecting device about a pivot axis near one end, with the interposition of a joint part, wherein said joint part comprises at least one resilient tongue engaging in a correspondingly shaped hole provided in said oscillating arm, and wherein said resilient tongue is rotatable along an hinge axis between an outward position retaining the wiper blade onto the oscillating arm and an inward position releasing the wiper blade form the oscillating arm, characterized in that said resilient tongue is forced in the outward position under the influence of a moment in case a force is exerted on the wiper blade in a direction away from the oscillating arm.
1. A method of connecting a wiper blade to a wiper arm, having at least one shaped hole provided in the wiper arm adjacent a free end thereof, said method comprising:
preparing a wiper blade having a longitudinally extending wiper element, a support structure supporting the wiper element, and a joint part pivotally connected to the support structure for relative pivotal movement about a pivot axis transverse to the longitudinal direction of the wiper element, and wherein the joint part includes at least one resilient latching tongue having an integral hinge adjacent one end of the joint part and extending therefrom to an opposite free end of the tongue which is spaced between a hinge axis and the pivot axis and being closer to the hinge axis than to the pivot axis; and sliding the joint part of the wiper blade into engagement with the wiper arm to cause the tongue to first deflect inwardly and then to spring outwardly as a projection adjacent the free end of the tongue comes into registry with and is received in the shaped hole of the wiper arm, and upon exerting a reverse longitudinal separation force on the wiper arm and joint part, causing the tongue whose projection is received in the at least one shaped hole to be urged further outwardly, such that the tongue actively resists disconnection from the wiper arm in response to such separation force tending to pull the wiper blade away from the wiper arm.
2. The method of claim 1 wherein the wiper arm to which the wiper blade is attached is selected to have at its free end a generally u-shaped configuration with a top wall and two side walls and with the at least one shaped opening being provided in at least one of the walls.
3. The method of claim 2 wherein the shaped opening is selected to be in the top wall.
4. The method of claim 2 wherein upon connecting the joint part with the wiper are, orienting the joint part such that the hinge of the tongue is pointed in the direction of sliding such that the free end of the tongue is extended away from the direction of sliding during the connection.
5. The method of claim 2 , wherein the shaped hole of the wiper arm is positioned, when the wiper blade is connected, between the hinge of the at least one tongue and the pivot axis of the joint part.