| 摘要 |
PURPOSE:To make the device itself small in size and to reduce the cost by integrating a magnet rotated through the reception of a rotating magnetic field and a turntable serving also as a yoke. CONSTITUTION:The turntable 4 and the magnet 2 are integrated and the turntable 4 is used in common for the yoke. A rotating magnetic field is generated by a current flowing through the coil 1, the rotating magnetic field drives the integrated magnet 2 and turntable 4 to drive a disk provided on the said turntable. In the figure, the number of changes in the polarity of the coil 1 and the magnet is three, and the number may be plural and the number of changes in the coil 1 and that of the magnet are not necessarily coincident with each other. Thus, number of components is reduced, the device itself is made small and the cost is reduced.
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