Invention Grant
US09256177B2 Image forming apparatus with a cam configured to change a pressurizing force applied to a rotation member, and a control unit configured to control a motor speed for driving the cam
有权
图像形成装置，其具有构造成改变施加到旋转构件的加压力的凸轮;以及控制单元，被配置为控制用于驱动凸轮的马达速度
- Patent Title: Image forming apparatus with a cam configured to change a pressurizing force applied to a rotation member, and a control unit configured to control a motor speed for driving the cam
- Patent Title (中): 图像形成装置，其具有构造成改变施加到旋转构件的加压力的凸轮;以及控制单元，被配置为控制用于驱动凸轮的马达速度
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Application No.: US14016991Application Date: 2013-09-03
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Publication No.: US09256177B2Publication Date: 2016-02-09
- Inventor: Tatsuhito Watanabe
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Priority: JP2012-195669 20120906
- Main IPC: G03G15/20
- IPC: G03G15/20
Abstract:
A fixing device causes an eccentric cam to perform a rotation step of 113° to shift from a pressurization releasing mode to a pressurization mode, and causes the eccentric cam to perform a rotation step of 263° to shift from a standby mode to the pressurization mode. A control unit activates a motor by setting a rotational speed of a rotational magnetic field of a stator to 600 rpm in the rotation step of 113° and to 1500 rpm in the rotation step of 263° so as to prevent the eccentric cam from receiving acceleration of a rotational direction from a pressure lever before a rotational speed of a rotor reaches a first rotational speed. Then, the control unit stops the rotational magnetic field of the stator based on an output of a photo interrupter.
Public/Granted literature
- US20140064763A1 IMAGE FORMING APPARATUS Public/Granted day:2014-03-06
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