| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of a collapse in the balance of a rotor by thermal deformation, etc., and the dislodgment from a flange member. SOLUTION: A rotary polyhedral mirror 1 is pressed to the flange member 4 integral with a revolving shaft 3 and is integrally coupled to the rotor 5 of a motor through the flange member 4. The flange member 4 and the rotor 5 which are separate parts are integrated by an anchor-shaped coupling part A formed by intermeshing rugged shape parts 4a and 5a facing opposite to each other. Even if the rotor 5 is bulged and tended to be separated from the flange member 4 on account of the deformation by the thermal deformation or centrifugal force, such parting is prohibited by the anchor-shaped coupling part A. |
