| 摘要 |
PURPOSE:To realize stabilized rotary driving by eliminating backlash at the bearing part thereby preventing fluctuation or vibration of the shaft. CONSTITUTION:The motor comprises a rotor 26 having a shaft 21 and a rotor magnet 24 magnetized with a plurality of poles, a stator 32 equipped with a plurality of stator coils 31 opposing through a slight air gap to the rotor magnet 24, and a thrust bearing 36 for the rotor 26. The thrust bearing 36 comprises a retainer 34 secured to the rotor 26 or the stator 32 and retains a large number of balls 33 rotatably, a stator side plate or a rotor side plate 25 disposed at a part abutting on the balls 33 in the retainer 34 for the stator 32 or the rotor 26. |
