Patent ID: 7585124
Filing Date: 2009-09-08
Classification: B41J

Abstract:
1. An armature structure comprising: an arm in which a through hole is formed near one end thereof; and two armature members each of which has a through hole common to the through hole of the arm, wherein the through hole in each of the two armature members is formed by a punching processing and a shear plane and a broken-out section are formed by the punching processing in an axial direction on an inner periphery of the through hole in each of the two armature members, wherein the shear plane and broken-out section formed in the two armature members are symmetric to each other, and wherein the two armature members are integrally joined to front and rear surfaces of the arm respectively so as to sandwich the arm therebetween in a manner so that the shear planes are positioned on an outer side and the broken-out sections are positioned on an inner side of the two armature members; and a fulcrum shaft which fits into the common through holes and integrally joins the arm and the two armature members.