Patent ID: 8346112

Claim:
A fixing device, comprising: a heating member configured to heat an unfixed toner image on a printing medium; a conveyance device configured to convey the printing medium launched from the heating member after the heating member heats the unfixed toner image; a heat temperature detection device configured to detect heat temperature of the heating member; an excessive temperature rise prevention device configured to forcibly cut off power distribution to the heating member when the heat temperature reaches an abnormal level; a cooling device configured to cool the excessive temperature rise prevention device; a cooling device control device configured to control the cooling device to cool the excessive temperature rise prevention device when the conveyance device stops a conveyance operation; a heating member use power supply configured to supply power to the heating member; and a cooling device control device use power supply configured to supply power to the cooling device control device, said cooling device control device use power supply being provided independently from the heating member use power supply.