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    • 3. 发明申请
    • DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
    • 开发设备和图像形成装置
    • US20120082487A1
    • 2012-04-05
    • US13109419
    • 2011-05-17
    • Sakae YOSHIOKAMasanori KATORyuji HATTORI
    • Sakae YOSHIOKAMasanori KATORyuji HATTORI
    • G03G15/09
    • G03G15/0921G03G15/0812
    • A developing device includes a developing roller; a housing that retains the developing roller such that the developing roller has exposed and unexposed portions, end portions of the housing having first faces curved along the unexposed portion and second faces facing inward; a layer-thickness regulating member having an edge near the developing roller; a first magnet including a first magnetic pole that attracts the developer and a second magnetic pole located downstream of the first magnetic pole and upstream of the exposed portion in a rotational direction of the developing roller, the second magnetic pole having a magnetic force of about 60 mT or less; second magnets retained on the first faces; and magnetic plates retained on the second faces and arranged such that developer chains formed thereon at the downstream ends in the rotational direction extend to positions upstream of the edge of the layer-thickness regulating member.
    • 显影装置包括显影辊; 保持显影辊的壳体,使得显影辊具有暴露和未曝光部分,壳体的端部具有沿着未曝光部分弯曲的第一面和面向内的第二面; 具有靠近显影辊的边缘的层厚调节构件; 第一磁体,其包括吸引显影剂的第一磁极和位于第一磁极下游的第二磁极和在显影辊的旋转方向上的暴露部分的上游,第二磁极具有约60°的磁力 mT以下; 保留在第一面上的第二磁体; 并且磁性板保持在第二面上并且布置成使得在旋转方向的下游端形成的显影剂链延伸到层厚调节构件的边缘的上游位置。