| 摘要 |
PURPOSE:To suppress the unnecessary vibrations in various directions by supporting a rotational shaft by bearings, and using a threaded rod having large rigidity as a control spring. CONSTITUTION:A rotational shaft 5 is supported by miniature bearings 4. A magnet 1 of a rotor is mounted on the shaft secured to a yoke 3 to facilitate the passage of magnetic flux. Similarly, the coil 2 of a stator is mounted together with the yoke 3 on a housing. On the other hand, the shaft 5 restricts the motion of rotating direction by a threaded rod 6 so that the center of the poles of the magnet 2 does not displace from the effective part of the coil 2. Accordingly, the shaft 5 is stopped at the angle that the repelling force between the torque generated when the coil current is applied and the rod 6 is balanced. |
