公开(公告)号：US20090225146A1

公开(公告)日：2009-09-10

申请号：US12389936

申请日：2009-02-20

申请人： AKITO YOSHIMARU

发明人： AKITO YOSHIMARU

IPC分类号： B41J2/385

CPC分类号： B41J2/473

摘要： A multi-beam scanning device for focusing deflected light beams onto an object to be scanned includes a light source unit, a deflector, a pitch adjustment device, and a conical-shape compression-torsion coil spring. The light source unit is rotatable about an optical axis and includes a plurality of light sources to emit the light beams and a plurality of coupling lenses disposed corresponding to the light sources. The deflector deflects the light beams emitted from the plurality of the light sources and passed through the plurality of the coupling lenses. The pitch adjustment device moves the light source unit in a first direction around the optical axis to adjust a beam pitch. The conical-shape compression-torsion coil spring urges the light source unit in a second direction opposite the first direction around the optical axis as well as in the optical axis direction. An image forming apparatus includes the multi-beam scanning device.

摘要翻译： 用于将偏转的光束聚焦到待扫描的物体上的多光束扫描装置包括光源单元，偏转器，俯仰调节装置和锥形压缩扭转螺旋弹簧。 光源单元可围绕光轴旋转并且包括发射光束的多个光源和对应于光源设置的多个耦合透镜。 偏转器使从多个光源发射的光束偏转并穿过多个耦合透镜。 俯仰调节装置使光源单元围绕光轴沿第一方向移动，以调整光束间距。 锥形压缩扭转螺旋弹簧沿着与光轴方向相反的第一方向和光轴方向的第二方向推压光源单元。 图像形成装置包括多光束扫描装置。