| 摘要 |
PURPOSE:To always keep a loaded reel at a prescribed position in the axial direction, by butting the end of a rotary shaft to a stator member with the continuous sucking force in the axial direction while the rotary shaft is turning. CONSTITUTION:A reel shaft driving mechanism contains a driving motor 22 and a reel shaft part 35 adhered to a shaft 23 of the motor 22. The motor 22 includes a rotor yoke 24 made of a magnetic material adhered to the shart 23, a rotor part comprising a circular magnet 25 of multi-pole magnetization, a driving coil 26, a stator yoke 27 made of a magnetic material with adhesion of the coil 26, and a stator part containing a housing 29 adhered with a bearing 28. The rotor part can turn freely by means of the bearing 28. One side of the magnetic flux of the magnet 25 pierces through the coil 26 to pass through the yoke 27 and then pierces through the coil 26 again to reach a magnetic pole contiguous to the magnet 25 and to close the magnetic path. While the magnetic flux of the other side closes the magnetic path of the yoke 24. As a result, the sucking force acts on between the rotor part and the yoke 27. |
