Patent ID: 6872016
Filing Date: 2005-03-29
Classification: B41J

Abstract:
1. An impact dot print head comprising: a plurality of armatures each disposed so as to be pivotable between a printing position and a stand-by position; printing wires provided so as to move with pivotal motions of the armatures; a yoke integrally provided with a pair of concentric, cylindrical portions of different diameters and cores with coils wound thereon respectively, the cores being arranged concentrically between the cylindrical portions correspondingly to the armatures; an armature spacer having a pair of concentric ring-shaped portions of different diameters almost equal to those of the pair of cylindrical portions respectively and also having a plurality of guide portions which span between the pair of ring-shaped portions so as to be each positioned between adjacent said armatures; and a fitting structure for fitting the cylindrical portion located on an inner periphery side of the yoke and the ring-shaped portion located on an inner periphery side of the armature spacer with each other.