| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor structure of a motor for a watch which can be provided with a less eccentric magnet, a motor for a watch with it, an electronic watch with it, and a method for forming a rotor structure of a motor for a watch. SOLUTION: The rotor structure 1 of a motor for a watch of an electronic watch includes a disc-shaped magnet 10 and a resin-made rotor body 20 for supporting the magnet 10. The rotor body 20 has a first radial hole 25 which extends along the plane perpendicular to a rotational axis C1 of the rotor body 20 and into which the disc-shaped magnet 10 is inserted. The peripheral walls 32A, 32B of the first radial hole 25 are provided with a holding surface for holding the magnet 10. The rotor body 20 is provided with a first positioning surface extending perpendicular to the extension direction of the first radial hole 25 around the opening on one end of the first radial hole 25. The disc-shaped magnet 10 is inserted into the first radial hole 25 along the hole 25 and is centered with respect to the rotor body 20 to form the rotor structure. COPYRIGHT: (C)2008,JPO&INPIT
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