JP2019105836A5 - - Google Patents

Claims (10)

A plurality of resistance heating elements that are arranged along the longitudinal direction of the substrate and electrically connected to each other in parallel;
Power control means for supplying power to the plurality of resistance heating elements;
First temperature detection means for detecting the temperature of the heating region of the first resistance heating element that is one of the plurality of resistance heating elements;
Second temperature detection means for detecting the temperature of the heating region of the second resistance heating element, which is another one of the plurality of resistance heating elements;
Based on the detection result of the first temperature detection means, the power amount of the power control means is controlled so that the temperature of the plurality of resistance heating elements becomes a first predetermined temperature, and the second temperature detection means Control means for cutting off the supply of power from the power control means to the plurality of resistance heating elements when detecting a second predetermined temperature;
A heating device comprising: The heating apparatus according to claim 1, wherein the first temperature detecting means detects a temperature of a heating region of the resistance heating element disposed in a central region in the longitudinal direction of the base material. The heating apparatus according to claim 1 or 2, wherein the second temperature detection means detects a temperature of a heating region of the resistance heating element disposed in a longitudinal end region of the base material.   The heating apparatus according to any one of claims 1 to 3, wherein the plurality of resistance heating elements are made of a resistance material having a positive resistance temperature characteristic.   The heating device according to any one of claims 1 to 4, wherein the plurality of resistance heating elements overlap each other in a longitudinal direction of the base material. In a fixing device for fixing the developer to the recording medium by passing the recording medium carrying the developer through a fixing nip formed between a pressure member and a nip forming member.
6. A fixing device comprising a cylindrical belt member heated by the heating device according to claim 1, and transmitting heat of the belt member to the fixing nip.   The fixing device according to claim 6, wherein the heating device is disposed inside the belt member and circulates around the heating device in a state where the belt member is sandwiched between the fixing nips.   The fixing device according to claim 6, wherein heat of the belt member is transmitted to the fixing nip via the pressure member.   The second temperature detecting means of the heating device according to claim 1 or 2 is in contact with an inner peripheral surface of the belt member on the downstream side of the resistance heating element disposed in a longitudinal end region of the base material. The fixing device according to claim 6.   An image having an image forming unit that forms an image with a developer, a recording medium supply unit that supplies a recording medium to the image forming unit, and the fixing device according to claim 6. Forming equipment.