LIGHT DEFLECTOR, OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

摘要

A light deflector includes a fixing portion, a movable portion and a reinforcing member. The movable portion includes a mirror portion for deflecting light by swinging about a predetermined swing axis, a torsion bar fixedly supported on the fixing portion and having an axis serving as the swing axis, and a supporting body configured to support the mirror portion and fixed to the torsion bar. The supporting body includes a contact surface to be held in contact with the mirror portion and a non-contact surface opposite to the contact surface. The reinforcing member is provided only on the non-contact surface out of the contact surface and the non-contact surface of the supporting body and reinforces the supporting body and adjusts a center of gravity of the movable portion so that the center of gravity of the movable portion is located on the axis.

主权项

1. A light deflector, comprising:
a fixing portion; and a movable portion including a mirror portion for deflecting light by swinging about a predetermined swing axis, a torsion bar fixedly supported on the fixing portion and having an axis serving as the swing axis, and a supporting body configured to support the mirror portion and fixed to the torsion bar; wherein: the supporting body includes a contact surface to be held in contact with the mirror portion and a non-contact surface opposite to the contact surface; and the light deflector further comprises a reinforcing member provided only on the non-contact surface out of the contact surface and the non-contact surface of the supporting body and configured to reinforce the supporting body and adjust a center of gravity of the movable portion so that the center of gravity of the movable portion is located on the axis.