| 摘要 |
PURPOSE:To prevent charging of a plunger by constructing the rotation stopper of the plunger shaft fixed to a hammer base with a conductive material, thereby allowing the static electricity generated on the plunger side to escape to the housing side. CONSTITUTION:The front half portion 11a of a plunger shaft 11 is slidably fitted into a bearing 13 provided on a hammer base 18. The front half portion 11a is made of a non-magnetic material, and the bearing 13 is made of a macromolecular material. A spring 14 is loaded between the bearing 13 and the rear half portion 11b. When a electromagnet 12 is energized in accordance with the recorded instructions, the rear half portion 11b made of a magnetic material is attracted to hit a recording element, thereby performing a recording. Right and left arms 11c are projectively provided on the lower portion of the rear half portion 11b, a rotation stopper 15 fixed to the hammer base 18 is slidably fitted between the two, and this rotation stopper 15 is formed of a conductive material. The static electricity, which was charged on the front half portion 11a during the process in which the plunger shaft 11 repeated sliding motions to perform a recording, flows through the rear half portion 11b which is made of a magnetic material and is conductive, the rotation stopper 15, and the hammer base 18 to the housing side, whereby charging of the plunger shaft is prevented. |
