Patent ID: 8923739

Claim:
A fixing device for fixing a toner image on a recording medium, the fixing device comprising: a coil disposed along an outer surface of a heating member and being operable to create a magnetic flux for induction heating of the heating member; a coil holding portion on which the coil is mounted; a core portion configured to provide for a magnetic path around the coil, the core portion including arch cores that cover an outer side of the coil, the arch cores being disposed opposite the heating member with the coil interposed therebetween and at a plurality of positions spaced in a width direction of the recording medium, and a side core that covers the outer side of the coil between the arch cores and the coil holding portion, and the core portion having at least one first elastic member between the side core and the arch cores such that the arch cores are not in direct pressing contact with the coil holding portion and are coupled to the coil holding portion via the at least one first elastic member and the side core; and a core fixing member configured to press the core portion toward the coil holding portion via at least one elastic member including the at least one first elastic member between the side core and the arch cores; wherein the core portion is fixed in the pressing state to the coil holding portion by fastening the core fixing member to the coil holding portion.