| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow loose dimensional control of components and reduce manufacturing costs in a rotor where a rotor core, a magnet, and a sleeve are fixed to one another, and the sleeve and a rotating shaft are fixed to each other, by means of press fitting or the like. <P>SOLUTION: A rotor for a stepping motor includes: a cylindrical rotating shaft 10; a sleeve 20 that is fitted to the rotating shaft 10; a magnet 30 that is fitted to the sleeve 20 and has a shaft hole with a circular cross-section; and rotor cores 40 that are fitted to the sleeve 20 so as to sandwich the magnet 30 therebetween and that have respective shaft holes with circular cross-sections. The rotating shaft 10 and the sleeve 20 are fixed to each other, and the sleeve 20, the magnet 30, and the rotor cores 40 are fixed to one another. An inner circumferential surface of the sleeve 20 has a polygonal cross section. <P>COPYRIGHT: (C)2013,JPO&INPIT |
