| 摘要 |
PURPOSE:To prevent galling on a stationary side by lowering the contact resistance on a rotating side and stationary side when impact is applied on a motor. CONSTITUTION:A revolving shaft 10 is engaged by having a clearance in a radial direction with a stationary shaft 11 disposed at the machine body of the motor and a rotary polyhedral mirror 2 is supported by a pedestal 15 mounted at this revolving shaft 10. Further, a rotor magnet 13 and an inner magnet 18, etc., which are part of means for generating rotating force and thrust direction supporting force are fixed to this pedestal 15. An annular sheet 25 consisting of a PFT as a friction force decreasing member is disposed between the rear end face of the revolving shaft 10 and the machine body 12. Direct contact of the revolving shaft 10 and the machine body 12 is prevented even if the revolving shaft 10 is deviated downward by application of impact thereon. |
