Patent ID: 6065179
Filing Date: 2000-05-23
Classification: B60S

Abstract:
A wiper device having a motor drive unit and an arm for moving a blade to be used to wipe a windshield surface, the arm comprising:a drive link having a base end portion swingably and pivotally supported on a vehicle body to reciprocatively swing according to a drive operation of the wiper drive unit;a connecting link having an end portion swingably and pivotally supported at an extreme end portion of the drive link;an operating link having a base end portion integrally fixed to the connecting link;a guide link having a base end portion swingably and pivotally supported on said vehicle body and an extreme end portion swingably and pivotally supported on the other end portion of the connecting link, the guide link operative to guide the operating link such that the extreme end portion of the operating link reciprocatively moves in an approximately straight line with a reciprocative movement of the drive link;a supporting link to which the blade is fixed, the supporting link having an end portion that is swingably and pivotally supported at the extreme end portion of the operating link; anda holding link having an extreme end portion swingably and pivotally supported at the other end portion of the supporting link, and a base end portion swingably and pivotally supported on a one of the guide link and the drive link, and that is operative to hold the supporting link in such a manner that an angle between the supporting link and a movement locus of the extreme end portion of the operating link is maintained at a nearly constant value.