Fixing device comprising supporting member having supporting face configured to come into contact with inner circumference face of fixing belt and image forming apparatus including the same

摘要

A fixing device includes a fixing belt, a pressuring member, a heating member, a pressing member and a supporting member. The heating member is arranged rotatably around a rotation axis and configured such that the fixing belt is sandwiched between the heating member and the pressuring member. The pressing member is configured to press the fixing belt to a side of the pressuring member and configured such that the fixing belt is sandwiched between the pressing member and the pressuring member. The supporting member has a supporting face configured to come into contact with the inner circumference face of the fixing belt. The supporting face is inclined toward inside in a radial direction of the fixing belt from both end sides to a center side of the fixing belt in the rotation axis direction.

主权项

1. A fixing device comprising:
a fixing belt arranged rotatably; a pressuring member arranged rotatably and configured to come into pressure contact with the fixing belt so as to form a fixing nip; a heating member arranged rotatably around a rotation axis and configured such that the fixing belt is sandwiched between the heating member and the pressuring member; a pressing member configured to press the fixing belt to a side of the pressuring member and configured such that the fixing belt is sandwiched between the pressing member and the pressuring member; and a supporting member having a supporting face configured to come into contact with the inner circumference face of the fixing belt, the supporting face being inclined toward inside in a radial direction of the fixing belt from both end sides to a center side of the fixing belt in the rotation axis direction, wherein diameter of the heating member is expanded from the both end sides to the center side of the fixing belt in the rotation axis direction, and wherein an inclination angle of the supporting face with respect to the rotation axis direction is larger than an inclination angle of an outer circumference face of the heating member with respect to the rotation axis direction.