FIXING DEVICE AND IMAGE FORMING APPARATUS

摘要

A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member and a first heating stop device. The fixing belt is provided to be rotatable around a rotation axis. The pressuring member is configured to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip. The heat source is arranged at an inner diameter side of the fixing belt, provided at a position displaced from the rotation axis and configured to heat the fixing belt. The pressing member is configured to press the fixing belt to a side of the pressuring member. The first heating stop device is configured to face an outer circumferential face of a closest part to the heat source of the fixing belt and to operate at a first operating temperature so as to stop the heat source from heating the fixing belt.

主权项

1. A fixing device comprising:
a fixing belt configured to be rotatable around a rotation axis; a pressuring member configured to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip; a heat source arranged at an inner diameter side of the fixing belt, provided at a position displaced from the rotation axis and configured to heat the fixing belt; a pressing member configured to press the fixing belt to a side of the pressuring member; and a first heating stop device configured to face an outer circumferential face of a closest part to the heat source of the fixing belt and to operate at a first operating temperature so as to stop the heat source from heating the fixing belt; wherein, when the heat source heats the fixing belt in a state where a rotation of the fixing belt is stopped, the closest part to the heat source of the fixing belt is deformed by a thermal expansion and comes into contact with the first heating stop device and the first heating stop device operates.