| 摘要 |
PURPOSE:To reduce the height of the entire cylinder motor by distributing rotary inertia on upper and lower shafts of upper and lower bearings and constructing to reduce the overhang amounts of the shaft at the upper and lower shafts, thereby shortening the distance between the beaings. CONSTITUTION:Two bearings 5, 5' are fored at the center of a lowe cylinder 12, thereby rotatably supporting a rotational shaft 18. A disc 15 is fixed to the upper part of the upside bearing 5 on the shaft 18, and an upper cylinder 13 is secured to the disc 15. On the other hand, a rotor magnet of a motor is secured through a rotor yoke 6 with the pole of the magnet 1 directed downwardly at the lower part of the downside bearing 5' on the shaft 18. A motor stator has a stator coil 2, a stator yoke 3, magnetic field detecting elements 4-4' and a flexible circuit board 30 mounted with the elements 4-4'. |
