BEARING STRUCTURE OF A WIPER ARM

摘要

In a wiper arm, the leading end of an arm support and the base end of an arm shank with a blade are rockably pivoted through a support shaft, and a bushing unit (6) composed of a bearing (6a) which the support shaft pierces and a resin material (6b) is pressed into a bearing hole bored at the leading end of the arm support. Since the peripheral surface of the bearing has concave portions and convex portions and the concave portions remain rough after the peripheral surface is processed, the adhesion between the bearing and the resin material is improved.