Tokyo Electric Co.

Takashi Kondoh

Masami Horii

Kuniaki Ochiai

Shigeo Komakine

Takeji Tuchiya

A dot print head includes an armature assembly constructed by providing an armature guide holding a plurality of armatures for swing motion in a cup-shaped housing having one open end, slidably guiding a plurality of print wires attached to the inner ends of the armatures by a wire guide, interposing armature return springs between the armatures and the armature guide, disposing an armature stopper in contact with the backsides of the armatures opposite to the front sides of the same facing the armature guide, and disposing stopper seats between the inner surface of the bottom wall of the housing and the inner surface of the armature stopper; and a yoke assembly joined and fastened to the armature assembly with fastening members.

Dot print head

The present invention provides a compact dot matrix print head comprising a housing internally provided with print wires, electromagnets for driving the print wires, a printed wiring board having a diameter smaller than the outside diameter of the rear end of the housing, fixedly joined to the rear end of the housing and provided with wiring patterns connected to the coils of the electromagnets, connectors connected to the outer surface of the printed wiring board so that the conductors thereof are connected electrically to the wiring patterns, and flexible cables each having one end connected to the connector and the other end connected to a driving unit for driving the electromagnets.

Dot matrix print head

A dot print head comprising a yoke, a plurality of cores formed integrally with the yoke in an annular arrangement in the peripheral portion of the yoke, solenoid coils wound respectively around the cores, armatures fixedly provided respectively with styluses, an armature support supporting each armature at the middle portion thereof opposite to the corresponding core for swing motion, and an armature holding member disposed opposite to the yoke with a predetermined gap therebetween to hold the armatures on the armature support for swing motion. A plurality of joining parts are formed on the yoke on a line on which the cores are arranged, and a plurality of joining parts are formed on the armature holding member so as to be joined respectively to the connecting parts of the yoke in joining together the yoke and the armature holding member.

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Shizuoka, Japan

Takashi Kondoh