| 摘要 |
<p>PURPOSE:To prevent an electric shock accident by axially energizing a rotor by an elastic element, and disconnecting the connection of the rotor with a bracket when a magnetomotive force is generated from an armature of a motor. CONSTITUTION:An armature winding 3 is provided on a stator core 2 of the inner periphery of a bracket 5, and a shaft 4 of a permanent magnet rotor 1 is rotatably provided at the central position to form a permanent magnet motor. In this case, an elastic element 8 for axially energizing the rotor 1 is provided on the shaft 4, and a pin 6 projected from the rotor is provided at the end of the rotor 1. Further, a rib 7 engaged with the pin 6 is projected on the inner surface of the bracket 5 by energizing the element 8. Thus, when the winding 3 is energized, the rotor 1 is displaced as shown, the pin 6 and the rib 7 are separated, and the motor can operate without fail. The pin 6 is engaged with the rib 7 when not energized, and an electric shock due to the generator operation is prevented by stopping the rotation of the rotor 1.</p> |
