Fixing device comprising deformation preventing member for preventing deformation of fixing belt and image forming apparatus including same

摘要

A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member, a heating stop device and a deformation preventing member. The deformation preventing member is configured to face an inner circumferential face of the fixing belt. In a state where the fixing belt is not broken in a circumferential direction, the fixing belt and the deformation preventing member are arranged at an interval, and when the fixing belt is broken in the circumferential direction, the fixing belt is deformed and comes into contact with the deformation preventing member so that the fixing belt is prevented from being deformed to a side far from the heating stop device.

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 configured to heat the fixing belt; a pressing member configured to press the fixing belt to a side of the pressuring member; a heating stop device configured to face an outer circumferential face of the fixing belt and to operate at an operating temperature so as to stop the heat source from heating the fixing belt; and a deformation preventing member configured to face an inner circumferential face of the fixing belt; in a state where the fixing belt is not broken in a circumferential direction, the fixing belt and the deformation preventing member are arranged at an interval, and when the fixing belt is broken in the circumferential direction, the fixing belt is deformed and comes into contact with the deformation preventing member so that the fixing belt is prevented from being deformed to a side far from the heating stop device.