| 摘要 |
<p>PURPOSE:To form an electrical switching mechanism, by holding a toothless gear unified with a magnet and a cam so as to be rotatable in a magnetic path, controlling the magnetic resistance of the magnetic path by a current of a coil, and holding a position of the toothless gear. CONSTITUTION:A toothless gear 1 having a toothless part 2 is formed as one body with a magnet 4 and a cam 5 so as to be freely rotatable by a shaft 3. An electromagnetic plunger 10 has yoke parts 11, 12, the yoke part has double-channel shape structure, and between both ends 12a, 12b, the toothless gear 1 is held exactly by a stabilizing iron core 16. When an electric power supply is closed, a driving gear 6 rotates in the direction as indicated with an arrow (d). When an FWD button is pushed, a coil 15 is electrically conducted, N and S are generated in the yoke parts 12a, 12b, the toothless gear 1 rotates clockwise by operating with the magnet 4, is engaged with the gear 6, and is returned to nonengagement. On its way, the cam 5 moves a head 19 to its operating position by a lever 22, brings an iron core 32 into contact with the yoke 11 by a lever 26, and sets the yoke 12 to a deenergized state. When the electric power supply is turned off, it is returned to its initial state. In this way, switching is executed exactly.</p> |
