Wire dot printer head and wire dot printer
AssigneeToshiba Tec Kabushiki Kaisha
InventorTakahiro Kawaguchi
Life of this patent
Estimating the term…
Abstract
A wire dot printer head of the present invention is configured by being provided with an abrasion preventive member which surrounds an outer circumference of support shafts of a plurality of armatures, between an armature spacer having a plurality of cutouts for respectively accommodating the support shafts of the plural armatures that respectively support printing wires, and a yoke which holds the support shafts of the plural armatures with the armature spacer. With this structure, the support shafts of the armatures do not directly contact with the yoke owing to the abrasion preventive member, thereby restraining abrasion of a surface of the yoke, and preventing a deterioration of printing quality.
Claims12
A wire dot printer head comprising:
- a plurality of armatures which respectively support printing wires and respectively have support shafts each functioning as a rotational center;
- a yoke which has a plurality of cores respectively wound by coils, and holds the support shafts of the plural armatures in such a manner that the plural armatures are respectively opposed to the cores;
- an armature spacer mounted on the yoke, which has a plurality of cutouts for accommodating the support shafts of the plural armatures, so that the plural armatures are allowed to swing without restraint, and holds the support shafts of the plural armatures with the yoke;
- a pressing member mounted on the armature spacer, which is formed so as not to interfere with swinging motion of the plural armatures and holds down the support shafts of the plural armatures;
- and
- an abrasion preventive member provided between the armature spacer and the pressing member, which is formed so as not to interfere with the swinging motion of the plural armatures, and surrounds an outer circumference of the support shafts of the plural armatures.
Dependencies are inferred from the claim text.