| 摘要 |
PURPOSE:To build in, miniaturize and thin a coreless motor into a rotation drum by supporting a rotation drum freely rotatably to a fixed shaft, fitting a stator coil to the fixed shaft, sandwiching the stator coil, executing the facing and fitting a rotor magnet and a rotor yoke to the rotation drum. CONSTITUTION:A rotor magnet 33 and a rotor yoke 42 are fitted at a rotation drum 25 so as to sandwich and face a stator coil 36 fitted horizontally to a fixed shaft 22. Consequently, the rotor yoke 42 is attracted by an attracting force P of the rotor magnet 33. here, since the rotor yoke 42 is fitted at the rotation drum 25, the attracting force P is received by the rotation drum 25 itself, and the attracting force P is not added as the load in a thrust direction to both bearings 23 and 24. Thus, a motor 30 of a structure, the so-called coreless structure, in which the attracting force P of the rotor magnet 33 is not added to both bearings 23 and 24 as an overload, can be built in the rotation drum 25.
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