Wiper system

B - Operations – Transporting – 60 – S

Patent

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Details

B60S 1/18 (2006.01) B60S 1/24 (2006.01)

Patent

CA 2104425

To allow compact design of a wiper system equipped with a wiping angle varying assembly which comprises an actuating motor, an eccentric cam member provided in a path of transmitting the movement of the output end of a wiper motor to a wiper arm, and a control unit for activating the actuating motor so as to move the eccentric cam member and thereby change the range of angle of the wiping movement by altering a configuration of a linkage structure provided between the wiper motor and the wiper arm, the control unit is adapted to activate the eccentric cam member with such a timing that the force transmitted through the linkage structure from the wiper motor to the wiper arm tends to assist the force produced by the actuating motor to move the eccentric cam member in the required direction. Thus, the requirement of the power output of the actuating motor can be reduced, and the actuating motor can be substantially reduced in size. As a result, the design of the wiping angle varying assembly is simplified, and the assembly may be conveniently incorporated in a linkage structure similar in structure to the conventional linkage structure for wiper systems not equipped with any wiping angle varying assembly.

Système d'essuie-glace à angle d'essuyage variable de format compact utilisant une came à excentrique pour transmettre le mouvement du moteur au bras d'essuie-glace et un dispositif pour commander le mouvement de la came à excentrique par le moteur pour faire varier l'angle d'essuyage en modifiant la configuration d'une tringlerie interposée entre le moteur et le bras d'essuie-glace; le dispositif de commande est conçu pour actionner la came à excentrique dans un synchronisme tel que la force motrice transmise au bras d'essuie-glace par l'intermédiaire de la tringlerie tend à se combiner à la force produite par le moteur pour actionner la came dans la direction voulue. Cette configuration se traduit par une diminution de la puissance requise et permet de réduire significativement la taille du moteur utilisé. La conception du système d'essuie-glace à angle d'essuyage variable se trouvant ainsi simplifiée, le système peut être intégré aux systèmes couramment utilisés et qui ne sont pas équipés du dispositif d'essuyage à angle variable.

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