Patent ID: 7782501

Claim:
A light-orientation adjusting unit for use with a light-receiving member, comprising: an optical unit to pass a light beam toward the light-receiving member, the optical unit being movable to change a posture of the optical unit; an inclination control unit to control the posture of the optical unit to adjust an inclination of scanning line to be formed on the light-receiving member by the light beam; a first regulating member to limit a movement of the optical unit, controlled by the inclination control unit, within a given range by contacting the first regulating member to the optical unit, the first regulating member being provided with a first biasing member and being disposed on a first end of an upper face of the optical unit; and a second regulating member to limit a movement of the optical unit, controlled by the inclination control unit, within a given range by contacting the second regulating member to the optical unit, the second regulating member being provided with a second biasing member and being disposed on a second end of the upper face of the optical unit, the second end being opposite to the first end of the optical unit, wherein the first regulating member is fixed at a given position while securing a clearance with the optical unit, and the first regulating member contacts the optical unit when the optical unit is moved for a distance of the clearance set between the optical unit and the first regulating member, and wherein the second regulating member is fixed at a given position while securing a clearance with the optical unit, and the second regulating member contacts the optical unit when the optical unit is moved for a distance of the clearance set between the optical unit and the second regulating member.