| 摘要 |
<P>PROBLEM TO BE SOLVED: To arrange magnets in a circumferential direction and obtain a strong magnetic force. <P>SOLUTION: A rotation part 3A of a motor 1A has a shaft 31A, a rotor holder 32A, a magnet holder made of resin, and a plurality of magnets 34A. The magnet holder has a base part 331A and a plurality of arm parts 332A. The plurality of arm parts extend outside in the radial direction of the rotor holder from the base part. The plurality of magnets are disposed between the plurality of arm parts respectively. This positions the plurality of magnets in the circumferential direction. Since the base part is disposed on a position overlapping with the magnets in the radial direction, a length of the magnets in an axial direction is not limited. Therefore, the length of the magnet in the axial direction is set to be long and strong magnetic force can be obtained. A width of the arm part in the circumferential direction is shorter than a length of the arm parts in the radial direction. Thereby, a length of magnet in the circumferential direction is set to be long so that stronger magnetic force can be obtained. <P>COPYRIGHT: (C)2013,JPO&INPIT |
