发明授权
- 专利标题: Fixing device and image forming apparatus incorporating same
- 专利标题(中): 固定装置和包含其的图像形成装置
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申请号: US14182878申请日: 2014-02-18
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公开(公告)号: US09002251B2公开(公告)日: 2015-04-07
- 发明人: Motokazu Hasegawa , Susumu Matsusaka , Yukari Isoe
- 申请人: Motokazu Hasegawa , Susumu Matsusaka , Yukari Isoe
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2013-035610 20130226
- 主分类号: G03G15/20
- IPC分类号: G03G15/20
摘要:
A fixing device includes a fixing member including a heat generator and an induction heater to heat the fixing member by electromagnetic induction. The induction heater includes an excitation coil, a ferromagnetic core to form a magnetic path to direct magnetic flux arising from the excitation coil to the fixing member, and a holder to hold the excitation coil and the ferromagnetic core. The holder has a surface facing the heat generator. The surface has a plurality of slits extending parallel to a direction of rotation of the fixing member. The ferromagnetic core is coupled to the holder and covers an open bottom portion of each slit of the plurality of slits to form a plurality of bottomed grooves.