Impact dot print head and a printer including the same

A printer comprising:

• an impact dot print head including:
• 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;
• a head drive mechanism for reciprocating the impact dot print head in a horizontal scanning direction;
• a printing control means which in accordance with printing data causes the impact dot print head to be reciprocated by the head drive mechanism and which causes the armatures in the impact dot print head to pivot selectively;
• and
• a recording medium conveying mechanism which brings a recording medium into opposition to the impact dot print head in the reciprocative range of the impact dot print head and which conveys the recording medium in a vertical scanning direction orthogonal to the horizontal scanning direction in accordance with a printing control made by the printing control means.