| 摘要 |
PURPOSE:To obtain a spring charge type printing head having a simplified-shape magnetic circuit by forming an inner core, a bypass bridge, and a ring yoke into an integrated structure. CONSTITUTION:A bypass bridge 7 wound with a bridge coil 6 is provided in such a way as to connect a ring yoke 2 with an inner core 3 correspondingly to each inner core 3. The yoke 2, the bridge 7, and the core 3 are integrally molded by lost wax, etc. Since the yoke 2, the bridge 7, and the core 3 are integrated, such visalignment as in the conventional bonding case does not takes place. Furthermore, since the magnet can be attached finally, workability can be enhanced, and highly reliable printing can be obtained at low cost. |
