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    • 5. 发明授权
    • Fixing device and image forming apparatus
    • 固定装置和成像装置
    • US09052650B2
    • 2015-06-09
    • US13671082
    • 2012-11-07
    • Motoyoshi YamanoJun OkamotoTetsuo TokudaTakashi SakamakiSatoshi UenoNaoto SuzukiFumihiro Hirose
    • Motoyoshi YamanoJun OkamotoTetsuo TokudaTakashi SakamakiSatoshi UenoNaoto SuzukiFumihiro Hirose
    • G03G15/20
    • G03G15/2053
    • A fixing device fixes a toner image on a recording medium by heating the recording medium, with a heating area and a non-heating area selected in accordance with a magnetic flux and a repulsive magnetic flux. The fixing device includes a heat generating layer, an exciting coil, and a demagnetizing member. The heat generating layer generates heat. The exciting coil generates the magnetic flux, and thereby inductively heats the heat generating layer. The demagnetizing member faces the heat generating layer in the non-heating area. The demagnetizing member generates the repulsive magnetic flux against the magnetic flux generated by the exciting coil, and thereby demagnetizes the magnetic flux and suppresses the heating. Further, the demagnetizing member has a demagnetization effect different between at least a portion of the non-heating area adjacent to the heating area and the remaining portion of the non-heating area.
    • 定影装置通过加热记录介质,根据磁通量和排斥磁通量选择加热区域和非加热区域,将调色剂图像定影在记录介质上。 固定装置包括发热层,励磁线圈和退磁构件。 发热层产生热量。 励磁线圈产生磁通量,从而感应加热发热层。 退磁构件面向非加热区域中的发热层。 退磁构件产生抵抗由励磁线圈产生的磁通的斥力磁通,从而使磁通消磁,并抑制加热。 此外,退磁构件在与加热区域相邻的非加热区域的至少一部分与非加热区域的剩余部分之间具有不同的退磁效果。