| 摘要 |
PURPOSE:To increase the fixing strength of a coil unit to a holder by integrating a yoke with an armature coil. CONSTITUTION:A yoke 14 is formed of ferrite and is fixed to a rotor shaft 9 through a holder 15, and an armature coil 11 is radially entirely wound substantially through a center on the outer surface of the yoke 14. A commutator 12 is provided at the center of the coil 11, and a brush 13 is slidably contacted with the commutator 12. Field magnets 3a, 3b, 4a, 4b and the coil 11 are opposed via gaps to the flat part of the yoke 14. According to this structure, since the yoke is integral with the armature coil, the fixing strength of the coil to the holder can be strengthened. |
