| 摘要 |
PURPOSE:To prolong the life of a printing head and accelerate printing action by selecting a dot-like welded part between printing wire and an armature, in a position where a bending stress appearing on the welded part becomes small when the armature is driven by a solenoid. CONSTITUTION:A groove-like recessed part 19 formed by curving a beam part is provided on an end 18a where printing wire 5 of the beam part 18 is fixed. Then the beam part 18 and wire 5 are welded in the form of dots at a point W in a state where one end 5a of the wire 5 is embedded in the recessed part 19. The point W is a central point of the size G of the tip 18a of the beam part. Each part is constituted in such a manner that an axial line along the longitudinal direction of a leaf spring 1, an axial line along the longitudinal direction of the body 17 of an armature, and the axial line of a virtual plane and printing wire which divides the thickness of an armature beam part 18 in two parts at said armature beam part 18, are included in a single virtual plane which is vertical with a paper surface, including an axial line Z-Z. |
