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    • 4. 发明申请
    • Mark detector, drive controller, belt drive unit, and image forming apparatus
    • 标记检测器,驱动控制器,皮带驱动单元和成像设备
    • US20060116228A1
    • 2006-06-01
    • US11269812
    • 2005-11-09
    • Takuro KamiyaKoichi KudoKatsuya Kawagoe
    • Takuro KamiyaKoichi KudoKatsuya Kawagoe
    • F16H7/22
    • G03G15/5008G03G15/0194G03G2215/0016
    • A mark detector optically detecting a scale having multiple marks formed successively at predetermined intervals along the moving direction of an endless belt member, and outputting an electrical signal corresponding to the presence or absence of the marks when the endless belt member moves is disclosed. The mark detector includes a light illumination part configured to illuminate the light illumination surface of the endless belt member on which surface the scale is formed with parallel light rays; a light receiving part configured to receive reflected light from the light illumination surface; and a variation prevention part configured to prevent a variation of the light illumination surface. The variation prevention part includes a holding member configured to hold the endless belt member in the vicinity of the light illumination surface movably in the moving direction from the exterior surface side and the interior surface side of the endless belt member.
    • 公开了一种标记检测器,其光学检测沿着环形带构件的移动方向以预定间隔连续形成的多个标记的刻度,并且当环形带构件移动时,输出对应于有无标记的电信号。 标记检测器包括:照明部,被配置为以平行光线照射其上形成有鳞片的表面的环形带构件的光照射面; 被配置为接收来自所述光照明表面的反射光的光接收部分; 以及变形防止部,被配置为防止光照射面的变化。 变形防止部包括保持构件,其构造成从环形带构件的外表面侧和内表面侧沿着移动方向可动地将环形带构件保持在光照射面附近。