Patent ID: 6993262
Filing Date: 2006-01-31
Classification: G03G

Abstract:
1. A fixing apparatus comprising: a heating member to be rotated to fix toner images; a coil which generates a high-frequency magnetic field to perform induction heating in the heating member; a high-frequency wave generating circuit which operates with power supplied from a power supply and which outputs a high-frequency current to the coil for generating the high-frequency magnetic field; a current-detecting unit which detects a current supplied from the power supply to the high-frequency wave generating circuit; a control unit which drives the high-frequency wave generating circuit when an operation-on signal for initiating the induction heating acquires a first logic level and which stops the high-frequency wave generating circuit when the operation-on signal acquires a second logic level; and a protection circuit which controls supply of the current to the high-frequency wave generating circuit in accordance with the logic level of the operation-on signal and the magnitude of the current detected by the current-detecting unit.