Wire dot printer head and wire dot printer
AssigneeToshiba Tec Kabushiki Kaisha
InventorsKeishi Tsuchiya, Yasunobu Terao
Life of this patent
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Abstract
A wire dot printer head of the present invention is provided with an abrasion preventive member in a yoke. The abrasion preventive member encloses the outer periphery of the armature support shafts. The yoke, together with an armature spacer having a plurality of cutouts for holding the armature support shafts, holds the armature support shafts. The armature support shafts do not directly contact the yoke because of the use of the abrasion preventive member. It is therefore possible to restrain abrasion of the yoke surface and accordingly to prevent deterioration in printing quality.
Claims14
A wire dot printer head comprising:
- a plurality of armatures each supporting a printing wire, and each having a support shaft on the center of which the armature rotates;
- a yoke having a plurality of cores each wound with a coil, and supporting each support shaft of the armatures in such a manner that the armatures may face to a plurality of cores respectively;
- an armature spacer mounted on the yoke, having a plurality of cutouts in which the plurality of support shafts are held in such a manner that the armatures can rock therein, and holding, together with the yoke, the armature support shafts;
- a holding member mounted on the armature spacer, and so formed as not to interfere with the rocking motion of the armatures, for holding the armature support shafts;
- and
- an abrasion preventive member enclosing the outer periphery of the armature support shafts.
Dependencies are inferred from the claim text.