| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving device which can protect a rotor when two bobbins are fixed by laser welding and can have enough strength after laser welding. SOLUTION: A stepping motor comprises a first bobbin 5, a second bobbin 7, and a magnetic pole section 6a, which are arranged from outside toward inside when viewed from the position whereon laser is to be cast. The magnetic pole section 6a covers at least part of the peripheral surface of a rotor unit consisting of a magnet section 1, a core 2, and a rotating shaft 3. COPYRIGHT: (C)2009,JPO&INPIT
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