Patent ID: 8737897

Claim:
A fixing device comprising: a pressing rotating body; a heating rotating belt having an inner surface and an opposite outer surface, the heating rotating belt being disposed such that the outer surface faces the pressing rotating body, and being configured to form a fixing nip between the outer surface and the pressing rotating body, and to be rotationally driven about a rotational axis by the rotation of the pressing rotating body; an induction coil disposed so as to face the outer surface of the heating rotating belt in a radial direction of the heating rotating belt and configured to generate magnetic flux; a magnetic core portion configured to form a magnetic path of the magnetic flux generated by the induction coil; and a belt guide member disposed on the inner surface of the heating rotating belt in the radial direction of the heating rotating belt, and configured to be in contact with at least part of the inner surface of the heating rotating belt to position the heating rotating belt, and to guide the rotation of the heating rotating belt, wherein the belt guide member includes (i) a coil side section that is disposed toward the induction coil relative to the rotational axis and that includes a temperature-rise corresponding portion and a non temperature-rise corresponding portion disposed on the outer side of the temperature-rise corresponding portion in a width direction of the heating rotating belt, and (ii) a nip side section that is disposed toward the pressing rotating body relative to the rotational axis and that includes a paper-passing corresponding portion corresponding to a paper-passing region through which a receiving material passes and a heat transfer portion disposed on the outer side of the paper-passing corresponding portion in the width direction of the heating rotating belt, the heat transfer portion having thermal conductivity higher than the thermal conductivity of the paper-passing corresponding portion.