Fixing device with drive unit for core unit, image forming apparatus and electromagnetic-induction heating unit

摘要

A fixing device for fixing a toner image on a recording medium includes a toner fusing unit that is operable to fix the toner image on the recording medium and that includes a pressure member and a heating member in contact with the pressure member to form a fixing nip therebetween; an electromagnetic-induction heating unit having a coil disposed along an outer surface of the heating member and configured to generate a magnetic flux for applying induction heating to the heating member, and a core unit disposed opposite the heating member with the coil interposed therebetween to provide for a magnetic path around the coil, the core unit being configured to rotate about an axis extending across the width of the recording medium; and a drive unit formed integrally with the electromagnetic-induction heating unit and configured to rotate the core unit.

主权项

1. A fixing device for fixing a toner image on a recording medium, the fixing device comprising:
a toner fusing unit that is operable to fix the toner image on the recording medium and that includes a pressure member and a heating member in contact with the pressure member to form a fixing nip therebetween; an electromagnetic-induction heating unit having (i) a coil disposed along an outer surface of the heating member and configured to generate a magnetic flux for applying induction heating to the heating member, (ii) core unit disposed opposite the heating member with the coil interposed therebetween to provide for a magnetic path around the coil, the core unit being configured to rotate about an axis extending across the width of the recording medium, and (iii) a coil holder for holding the coil and having a casing; and a drive unit-attached to the coil holder of the electromagnetic-induction heating unit, configured to rotate the core unit, and including a gear train disposed inside the casing.