Patent ID: 8090304

Claim:
A heating device comprising: a magnetic field generating unit that generates a magnetic field; a heat-generating member that is disposed so as to face the magnetic field generating unit, and generates heat due to electromagnetic induction of the magnetic field, and has a heat-generating layer of a thickness that is thinner than a skin depth; a temperature-sensitive member that is disposed so as to face a side of the heat-generating member opposite a side at which the magnetic field generating unit is located, and generates heat due to electromagnetic induction of the magnetic field, and includes a temperature-sensitive magnetic member whose magnetic permeability starts to decrease continuously from a magnetic permeability change start temperature that is in a temperature region that is greater than or equal to a set temperature and less than or equal to a heat-resistant temperature; and an approaching/separating mechanism that maintains the temperature-sensitive member in a state of being separated from the heat-generating member until before a temperature of the temperature-sensitive member reaches the set temperature, and causes the temperature-sensitive member to contact the heat-generating member at and after the time when the temperature-sensitive member reaches the set temperature.