Patent ID: 9075339
Filing Date: 2015-07-07
Classification: G02B,G03G

Abstract:
1. A polygon mirror assembly comprising: a polygon mirror formed of a plastic material and having a plurality of reflection surfaces; a motor unit to support and rotate the polygon mirror, the polygon mirror being coupled to the motor unit by an adhesive material; and a holder frame coupled to a rotation axis of the motor unit, the polygon mirror being coupled to the holder frame by the adhesive material, wherein the polygon mirror comprises a hole, a part of the holder frame being inserted into the hole, and the adhesive material uniformly covers an innermost diametrical surface of the polygon mirror defining the hole, and wherein a tilt preventing step having a space to accommodate adhesive material discharged from between the polygon mirror and an outer surface of the holder frame is formed on a lower side of the innermost diametrical surface of the polygon mirror.