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    • 6. 发明授权
    • Developing unit containing multiple supply rollers and image forming apparatus using the same
    • 包含多个供应辊的显影单元和使用其的成像设备
    • US09020404B2
    • 2015-04-28
    • US13075770
    • 2011-03-30
    • Jin-hong KimJoo-hwan NohYoung-su LeeYun-kyu Sim
    • Jin-hong KimJoo-hwan NohYoung-su LeeYun-kyu Sim
    • G03G15/08
    • G03G15/0808
    • A developing unit includes a toner storage portion for containing toner and a development portion for containing the toner supplied from the toner storage portion. The development portion includes a developing roller for supplying the toner to a photosensitive body, a supply roller and an auxiliary supply roller. The supply roller and the auxiliary supply roller rotate while facing each other to supply the toner to the developing roller. In the developing unit, an inequality that |D−(R1+R2)|≦1.0 mm is satisfied, where a distance between the centers of the auxiliary supply roller and the supply roller in a region where the auxiliary supply roller and the supply roller face each other is D, a radius of the supply roller is R1, and a radius of the auxiliary supply roller is R2.
    • 显影单元包括用于容纳调色剂的调色剂储存部分和用于容纳从调色剂存储部分供应的调色剂的显影部分。 显影部分包括用于将调色剂供应到感光体,供给辊和辅助供应辊的显影辊。 供给辊和辅助供给辊相对旋转而将调色剂供给到显影辊。 在显影单元中,满足| D-(R1 + R2)|≦̸ 1.0mm的不等式,其中辅助供给辊和供给辊的中心之间的距离在辅助供应辊和供给 辊面彼此为D,供给辊的半径为R1,辅助供给辊的半径为R2。