| CPC G03G 15/2039 (2013.01) [G03G 15/2028 (2013.01); G03G 15/2064 (2013.01); G03G 2215/2035 (2013.01)] | 6 Claims |
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1. A heating device comprising:
a first rotating body;
a heater that is long and includes a heating element and a substrate on which the heating element is located, wherein the heater is disposed in a space inside the first rotating body;
a temperature detection element configured to detect temperature of the heater; and
a heater holder configured to hold the heater,
wherein, when a direction of a longer side of a first surface of the substrate where the heating element is located is designated as a longitudinal direction, a direction orthogonal to the longitudinal direction on the first surface is designated as a transverse direction, and a direction orthogonal to both the longitudinal and transverse directions is designated as a thickness direction, the temperature detection element is located on a second surface opposite to the first surface in the thickness direction, and the heater holder includes a reservoir portion configured to reserve grease to be supplied to between the first rotating body and the heater in the longitudinal direction, and
wherein, when an area of the reservoir portion overlapping an area where the temperature detection element is located is designated as a first area, an area of the reservoir portion not overlapping the area where the temperature detection element is located is designated as a second area, a length of the first area in the thickness direction is a first length, and a length of the second area in the thickness direction is a second length, the first length is greater than the second length.
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