| 摘要 |
PURPOSE: A head of dot printer is provided to easily couple a needle and an armature. CONSTITUTION: A head of dot printer includes a guide body(10); multiple armatures(50a); a cover member(70); and springs(21). The guide body joins multiple needles(20a) to be able to selectively come out and go in. The armatures are driven by an electromagnetic circuit to selectively strike the needles. The cover member keeps gaps between the armatures. The springs return struck needles to original positions. One ends of the armatures and one ends of the needles are integrally formed. The armatures and the needles are integrated by soldering or ultrasonic welding, or integrally formed on manufacturing. The ultrasonic welding is preferable for easiness of working and joining strength.
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