Fixing device and image forming apparatus

An image forming apparatus comprising:

• a toner image forming unit that forms a toner image;
• a transfer unit that transfers the toner image formed by the toner image forming unit onto a recording medium;
• a fixing unit including:
• a fixing member that includes a conductive layer and that fixes toner on the recording medium with the conductive layer self-heated by electromagnetic induction;
• a drive unit that rotationally drives the fixing member;
• a fixing and pressing member that forms a fixing nip portion for inserting the recording medium holding an unfixed image thereon between the fixing and pressing member and the fixing member by being brought into contact with and pressed against an outer peripheral surface of the fixing member, and thus is brought into contact with and pressed against the fixing member, when fixation is performed, and that moves so as to be separated from the fixing member when fixation is not performed;
• a magnetic field generating member that generates an alternate-current magnetic field intersecting with the conductive layer of the fixing member;
• a magnetic path forming member that is arranged so as to be in contact with an inner peripheral surface of the fixing member, that forms a magnetic path of the alternate-current magnetic field generated by the magnetic field generating member and that transmits heat to the fixing member by being self-heated by electromagnetic induction;
• an induction member that is arranged so as to be in contact with an inner peripheral surface of the magnetic path forming member, that induces magnetic field lines passing through the magnetic path forming member and that diffuses heat generated at the magnetic path forming member;
• and
• an elastic member that generates force in a direction to press the magnetic path forming member and the induction member against the inner peripheral surface of the fixing member;
• and
• a controller that controls movement of the fixing and pressing member of the fixing unit.