发明授权
US07890042B2 Image forming apparatus with fixing unit having induction heating member and shielding member for controlling induction heating
有权
具有固定单元的图像形成装置具有感应加热构件和用于控制感应加热的屏蔽构件
- 专利标题： Image forming apparatus with fixing unit having induction heating member and shielding member for controlling induction heating
- 专利标题（中）： 具有固定单元的图像形成装置具有感应加热构件和用于控制感应加热的屏蔽构件
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申请号： US12390569申请日： 2009-02-23
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公开(公告)号： US07890042B2公开(公告)日： 2011-02-15
- 发明人: Naoyuki Ishida , Akihiro Kondo , Yuzuru Nanjo , Syoukou Gon , Kenichi Kasama , Eiji Nakajima
- 申请人： Naoyuki Ishida , Akihiro Kondo , Yuzuru Nanjo , Syoukou Gon , Kenichi Kasama , Eiji Nakajima
- 申请人地址： JP
- 专利权人： Kyocera Mita Corporation
- 当前专利权人： Kyocera Mita Corporation
- 当前专利权人地址： JP
- 代理商 Gerald E. Hespos; Michael J. Porco
- 优先权： JP2008-057316 20080307
- 主分类号： G03G15/20
- IPC分类号： G03G15/20
摘要：
An image forming apparatus includes an image forming unit and a fixing unit. The fixing unit includes a heating member; a coil arranged along an outer surface of the heating member for generating a magnetic field for induction heating the heating member; a core arranged to face the heating member with the coil located therebetween in order to form a magnetic path around the coil and made of a magnetic material; a shielding member arranged near the magnetic path generated by the coil, including a closed frame portion and made of a nonmagnetic metal; and a magnetic shielding portion for displacing the shielding member between a retracted position for permitting a magnetic flux to pass along a frame surface virtually formed inside the closed frame portion and a shielding position for shielding magnetism by the penetration of a magnetic flux inside the frame surface.
公开/授权文献
- US20090269109A1 IMAGE FORMING APPARATUS 公开/授权日：2009-10-29