| 摘要 |
1. Print hammer drive with a flexible print hammer arm attached to the fixed end, with permanent magnet keeping biased the free end of the print hammer arm, with a release winding to generate a release flux opposing the holding magnet flux caused by the permanent magnets, characterized in that two spaced permanent magnets (20, 21) are provided as holding magnets for the free end of the print hammer arm (14), that between these permanent magnets (20, 21) a flux-conductive pole piece (30) is provided that is surrounded by a release winding (31), that the two permanent magnets (20, 21) are respectively arranged in the outer legs of a substantially E-shaped magnetic yoke whose center leg is formed by the pole piece (30), that the free end of the center leg forms a stop for the print hammer arm, one operating gap (36) being formed between the free ends of the outer legs and the print hammer arm in its biased state. |
