| 摘要 |
PURPOSE:To prevent the start failure due to contact inferiority between a brush and a commutator and add vibration force, in the vibration motor being stored for the call of a vibration type pager a mobile telephone. CONSTITUTION:A soft magnetic material or a permanent magnet is attached to one part of a rotor, over a pair of poles of a field so as to increase whirling force, and also the stoppage position is regulated by the said soft magnetic material or the permanent magnet so that the said rotor may not stop at the position where a brush sits astride between commutators. |
