| 摘要 |
<p>PURPOSE: To improve the electromagnetic responsiveness, and to simplify the constitution by freely fitting a guide leg part of an armature in a plurality of fitting holes provided in a driving gear, and bringing a rotation transmitting surface of the armature into contact with the frictional surface of a body of revolution. CONSTITUTION: A guide leg part 3a of an armature hub 3 is freely fitted in a plurality of fitting holes provided in a driving gear l, and the armature hub 3 is fixed to a ferromagnetic plate 4. A body 5 of revolution is turnably fitted in the boss of the armature 3, and the prescribed clearance is provided between the frictional surfaces of the armature hub 3 and the body 5 of revolution, and a rotary shaft 6 of a rotor 8 is connected to the body 5 of revolution. When the ferromagnetic plate 4 is attracted due to the energization of an electromagnet 7, the frictional surfaces of the armature and the body 5 of revolution are pressed against each other, and the turning of the driving gear 1 is immediately transmitted to the rotary shaft 6 through the armature hub 3 and the body 5 of revolution. No elastic member to constantly attract the armature hub 3 to the driving gear side is provided, and the rotational motion can be transmitted by the energization of the electromagnet 7 with excellent responsiveness.</p> |
