| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor capable of preventing beat sounds of a rotor by a stable spring force, and having simple clutch means. <P>SOLUTION: A rotor 2 has: a cylindrical rotor supporter 4 at whose outer periphery a rotor magnet 4b is provided, and at whose one end part a cylindrical recessed part 4a is provided; and a rotor shaft 3 whose base end 3a side is inserted into the recessed part 4a, and at whose other end 3b side a pinion 3c is formed. The rotor 2 is inserted into a rotor post 14 fixed to a bottom part 11a of a casing 11 and a partition plate 10, and is provided rotatably and movably. In the rotor shaft 3, clutch means 6 making connection between the rotor shaft 3 and the rotor supporter 4 detachable is provided at the base end 3a side via a coil spring 5. By energization of the coil spring 5, movement of the rotor 2 in a shaft line direction is restricted, and the clutch means 6 is engaged to rotate the rotor shaft 3 and the rotor supporter 4 together. When an external torque becomes larger than the energization of the coil spring 5, the clutch means 6 is released to idle the rotor supporter 4. <P>COPYRIGHT: (C)2013,JPO&INPIT |
