| 摘要 |
PURPOSE:To release armatures easily even in ones having comparatively small currents, and to reduce the fatigue of leaf springs extremely by forming each armature so that upper surfaces thereof are thickened on the center yoke sides and thinned on the electromagnet mechanism sides and supporting the armatures by the leaf springs. CONSTITUTION:Several armature 4 is shaped so that upper surfaces thereof are thickened on the center yoke 1 side and thinned on the electromagnet mechanism 2 sides, and upper surfaces on the center yoke 1 sides of each armature 4 are fixed in respective leaf spring 6. When currents for printing are conducted to a coil 2b and reversed excited magnetic flux phim is generated to the magnetic flux phio of a magnetic circuit constituted in a center yoke 1, a core section 2a for an electromagnet mechanism 2 and the connector of the armature 4 by a permanent magnet 3 under a waiting state, the armature 4 is driven in the direction of a platen by the restoring elastic energy of the leaf spring 6. The armature 4 is detached from the electromagnet mechanism 2 side, thus resulting in satisfaction by comparatively small currents to the coil 2b. |
