| 摘要 |
PURPOSE:To make a rotor ready for switching in any running direction by changing a gap between the rotor and a stator with a given operating member. CONSTITUTION:Stators 13, 14 with an arched inside peripheral surface are provided on both sides of a coil core 12 with a coil 11 wound thereon, the one stator 13 is formed solidly with the coil core, and the other stator 14 is borne rotatably to a shaft 16. Then, a rotor 15 consisting of a permanent magnet is provided rotatably between the stators 13, 14, thereby keeping the one stator 13 opposite to the rotor 15 through an equal gap. An operating lever 18 having a slit to interlock with a pin 17 projected on the base of the stator 14, and a constitution is such that a gap given by the stator 14 and the rotor 15 gets narrow in a given running direction by operating said lever 18 in the direction indicated by arrow. |
