| 摘要 |
PROBLEM TO BE SOLVED: To make the man-hour required for assembling the coil one hammer head having two yokes comparable to that of one head one yoke. SOLUTION: In the hammer head having a hammer structure which forms a closed magnetic field by a hammer spring having a hammer pin for printing at the tip and mounting a front yoke in the middle, an upper/lower two stage yoke located to abut against the front yoke, and a permanent magnet where a coil is wound around the yoke to apply the magnetic field and the reverse magnetic field of the permanent magnet around the yoke, the coil is wound in the shape of S character around the upper/lower two stage yoke. COPYRIGHT: (C)2007,JPO&INPIT
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