| 摘要 |
PURPOSE:To stabilize the driving condition of armature by connecting in a round form a supporting point formed on the tip of a yoke with the coupling portion of an armature to be turned with couplement at the supporting point. CONSTITUTION:An electromagnet 20 fixed to the case 19 of a printer head 13 consists of a core 22 wound with a coil 21 and a yoke 23 magnetically coupled with the core 22. A round supporting point 24 is formed on the tip end of the yoke 23, and an armature 26 with a coupling portion of the same curvature is rotatably attached to the supporting point 24. The other end of the armature 26 is faced the core 22 with an aperture 27 of DELTAt, and a wire 32 fixed with a recording needle 23 is fixed to the lower end of the armature 26. Therefore, before and after the rotation of the armature 26, magnetic resistance between the supporting point 24 and the coupling portion 25 is not changed. The action of the armature 26 can thus be stabilized. |
