HIGH SPEED ROTATING DEVICE, PRESS-FITTING DEVICE, METHOD FOR MANUFACTURING ROTATING BODY, OPTICAL SCANNER AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To solve the problem that an excellent image output is not obtained because the mirror surface of a polygon mirror is deformed and a highly precise mirror surface is not maintained. SOLUTION: This high speed rotating device has a rotary sleeve 15, an outer peripheral cylindrical member 16 fitted on the outer peripheral part of the rotary sleeve 15 and shrinkage-fitted, a mirror 16a formed integrally with the outer peripheral part of the outer peripheral cylindrical member 16, a dynamic pressure air bearing means to support the rotary sleeve 15, a circumferential groove part 16b formed between the inner wall and the mirror 16a at the outer peripheral cylindrical member 16 and a clogging member 17 press-fitted in the through-hole of the outer peripheral cylindrical member 16.