| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor capable of achieving vibration reduction and capable of enhancing rotational performance. <P>SOLUTION: In an outer peripheral surface of a magnet pole section 24, assistant grooves 31 and 32 having a pair of side surface parts 31a and 31b (side surface parts 32a and 32b) opposing in a circumferential direction are provided in a recessed state, and an angle D from a circumferential direction center line Q of the magnet pole section 24 to a side surface part on the side of the circumferential direction center line Q in the assistant grooves 31 and 32 is formed so as to fulfill "D=M/2+G-a×360(degree)/L" (where a is a natural number) where an angle of opening of the magnet pole section 24 is "M (degree)", an angle of opening of an opening part 27 is "G (degree)", and the number of teeth 12 is "L (piece)". <P>COPYRIGHT: (C)2012,JPO&INPIT |
