| 摘要 |
<p>A print wire actuating device (10) for use in high-speed wire matrix printers includes a pair of spaced magnetic pole pieces (14, 16), a coil (56) operatively associated therewith, and a plunger (12) arranged to drive a print wire (36) in response to energization of said coil (56) which provides magnetic flux in a path through the pole pieces (14, 16), an interconnecting plate member (58) and the plunger (12). Resilient means (42) are arranged to return the plunger (12) after deenergization of the coil (56). According to the invention the pole pieces (14, 16) and the plunger (12) are flat members arranged in a substantially planar construction which has the advantage that the distance between print wires (36) of adjacent actuating devices (10) may be reduced and dot matrix print heads comprising such actuating devices (10) may be made smaller and more compact.</p> |
