Armature guide for wire dot print head

Details Armature guide for wire dot print head Armature guide for wire dot print head

1989-09-08

1991-03-26

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 224, B41J 228

Patent

active

050024124

ABSTRACT:
A print head for use in a wire dot printer has a plurality of wires, an armature connected to each of the wires, a core of a magnetic circuit which is disposed in opposing relation to the armature, a resilient member for biasing the armature in a direction in which it is separated from the core, and a rear case disposed so as to cover the upper side of the armature. Each of the wires is driven by the action of the armature which is attracted toward the core when a coil wound on the core is energized. The print head is provided with an armature guide having a resilient stopper disposed between each armature and the rear case to support the armature against the biasing force from the resilient member. Thus, it is possible to support each armature inserted into the armature guide by means of the stopper even more stably during an assembling step carried out before the rear case is mounted. Accordingly, the assembling operation is simplified and facilitated.

REFERENCES:
patent: 4260270 (1981-04-01), Cavallari
patent: 4338585 (1982-07-01), Volke
patent: 4441828 (1984-04-01), Ochiai
patent: 4618276 (1986-10-01), Blomquist

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