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    • 9. 发明授权
    • Developing device and image forming apparatus
    • 显影装置和图像形成装置
    • US09134652B2
    • 2015-09-15
    • US13584019
    • 2012-08-13
    • Masanori TanakaMotoki AdachiKentaro KawataTakayuki KanazawaShunsuke Mizukoshi
    • Masanori TanakaMotoki AdachiKentaro KawataTakayuki KanazawaShunsuke Mizukoshi
    • G03G15/00G03G15/08G03G21/16G03G21/18
    • G03G15/0896G03G21/1647G03G21/181
    • A developing device includes a developer carrying member, rotatable while carrying a developer, for supplying developer to an image bearing member, a developer supplying member, which is provided with a foam layer at its surface and is rotatable in contact with the developer carrying member, for supplying the developer to the developer carrying member, and a first gear for transmitting a driving force to the developer supplying member. The first gear is movable to a first position where the driving force is not transmitted to the developer supplying member and to a second position where the driving force is transmitted to the developer supplying member. During initial drive of the developer carrying member, the developer supplying member is rotated by a frictional force generated between the developer supplying member and the developer carrying member, with the first gear to be moved from the first position to the second position.
    • 显影装置包括显影剂承载构件,其可携带显影剂可旋转,用于向图像承载构件供应显影剂;显影剂供应构件,其在其表面处设置有泡沫层并且可旋转地与显影剂承载构件接触; 用于将显影剂供应到显影剂承载构件,以及用于将驱动力传递到显影剂供应构件的第一齿轮。 第一齿轮可移动到驱动力不传递到显影剂供应构件的第一位置和驱动力传递到显影剂供应构件的第二位置。 在显影剂承载构件的初始驱动期间,显影剂供应构件通过在显影剂供应构件和显影剂承载构件之间产生的摩擦力而旋转,第一齿轮将从第一位置移动到第二位置。