Inductive thermal fixing device for image forming device

摘要

A thermal fixing device is for thermally fixing an image to a recording medium. The thermal fixing device includes an induction coil, a propagation member, and a thermal roller. The propagation member is made from a magnetic material that propagates magnetic flux induced by the induction coil. The thermal roller has a thermal region including an outer peripheral surface and an inner peripheral surface. One or both of the outer peripheral surface and the inner peripheral surface of the thermal region is formed from a magnetic material. The propagation member is magnetically connected to both axial lengthwise ends of magnetic-material ones of the outer peripheral surface and at the inner peripheral surface.