| 摘要 |
PURPOSE:To prevent a failure of a device caused by the electrostatic noise even in the case where a user touches a fixing device when a user opens a door to remove paper jamming or the like by providing a means for releasing the electrostatic noise, which intrudes into a circuit for supplying the power to an opened heater when the door is positioned at an open position, to the grounding side. CONSTITUTION:A grounding pattern 1 is provided near a pattern on a circuit board, in which a circuit for connecting a heater 3 as a heat generator and a commercial power source 9 is formed. The grounding pattern 11 is provided so as to surround a power source line of the heater 3, and the insulating coating for protecting the pattern is scraped at neighboring parts of the pattern of the power source line and the grounding pattern 11 opposite to each other. In this case, the grounding pattern 11 is provided so as to be opposite to each phase of the power source supply side and the grounding side of the pattern a of the power source line, but, it can be provided so as to be opposite to any one of the phases. With this structure, the electrostatic noise, which intrudes the pattern of the power source line of the heater 3, is discharged to the grounding pattern 11 on the board. |
