| 摘要 |
PURPOSE:To enable the shortening of an axial length in the state being assembled with a propeller fan while maintaining the air flowing capacity constant by providing a brush at the inside surrounded by an armature coil. CONSTITUTION:A magnet 30 is secured to the inner peripheral surface of a casing 20 of a motor 11, a disc-shaped mounting plate 60 which mounts an armature coil 50 and a commutator 70 is provided, and the plate 60 is secured to the shaft 40 at a boss 61. A brush mounting plate 82 is secured in parallel with the plate 60 at one end of a magnetic flux returning plate 80, a brush 90 is contacted with a commutator surface 72 in a holder 91 provided in the hole, and is provided inside surrounded by the coil 50. Rotary force is produced at the coil 50 with a current flowing across the magnetic flux of the magnet 30, and the plate 60 and the shaft 40 are rotated. In this manner, the axial length to be assembled with a fan is minimized by shortening it as compared with the conventional cylindrical motor and the diameter as compared with the flat motor. |
