Fixing device and image forming apparatus incorporating same

A fixing device comprising:

• an endless belt-shaped fixing rotary body including a first heat generation layer;
• a pressing rotary body disposed opposite the fixing rotary body to form a nip therebetween through which a recording medium bearing a toner image passes;
• a heat generator to separably contact the fixing rotary body and including a second heat generation layer;
• an exciting coil unit disposed opposite the heat generator via the fixing rotary body to generate a magnetic flux;
• and
• a second moving mechanism connected to one of the heat generator and the exciting coil unit to move the one of the heat generator and the exciting coil unit between a non-opposed position where the heat generator is not disposed opposite the exciting coil unit and an opposed position where the heat generator is disposed opposite the exciting coil unit,
• wherein the exciting coil unit heats the first heat generation layer of the fixing rotary body by the magnetic flux at the non-opposed position, and heats both the first heat generation layer of the fixing rotary body and the second heat generation layer of the heat generator by the magnetic flux at the opposed position.

A fixing device comprising:

• an endless belt-shaped fixing rotary body including a first heat generation layer;
• a pressing rotary body disposed opposite the fixing rotary body to form a nip therebetween through which a recording medium bearing a toner image passes, the pressing rotary body including a second heat generation layer;
• an exciting coil unit disposed opposite the pressing rotary body via the fixing rotary body to generate a magnetic flux;
• and
• a coil moving mechanism connected to the exciting coil unit to move the exciting coil unit between a first position where the exciting coil unit is disposed away from the pressing rotary body and a second position where the exciting coil unit is disposed closer to the pressing rotary body,
• wherein the exciting coil unit heats the first heat generation layer of the fixing rotary body by the magnetic flux at the first position, and heats both the first heat generation layer of the fixing rotary body and the second heat generation layer of the pressing rotary body by the magnetic flux at the second position.