| 摘要 |
A fixing unit (300) which enables high-speed operation and miniaturization, and an image forming apparatus having the fixing unit (300), includes a heating member (220) which is heated by a heat source (210), the heating member (220) having a predetermined width; a rotating member (230) to rotate in contact with the heating member (220); a driving member (240) to rotate the rotating member (230); and a pressing member (250) to press both sides of the heating member (220) towards the driving member (240) and to form a predetermined fixing nip between the rotating member (230) and the driving member (240), wherein the heating member (220) has a second moment of inertia which is set to maintain a fixing efficiency of 90% or more in a central portion of the heating member (220). |
