Patent ID: 6702469
Filing Date: 2004-03-09
Classification: B29C,B29L,F16C

Abstract:
A resin molded article which is molded, using at least a first resin material, a second resin material and a third resin material having substantially no compatibility with one another, by an insert molding or a three-color molding to be in a state where (i) a roller member; (ii) a shaft member, which axially supports the roller member in a freely rotatable manner; and (iii) an elastic member having a cylindrical shape provided at an outer peripheral surface of the roller member are incorporated,wherein a mold shrinkage factor of the shaft member is greater than that of the roller member so that a clearance is produced between the roller member and the shaft member, wherein a mold shrinkage factor of the elastic member is greater than that of the roller member so that the elastic member is able to tighten the roller member, and wherein the shaft member has a slip stopping portion to regulate movement of the roller member in a shaft direction and the roller member has a plurality of protrusions, which protrude in a direction of a radius of the roller member, to regulate movement of the elastic member in the shaft direction and a rotating direction.