Temperature detection device, fixing apparatus, and image forming apparatus

A temperature detection device comprising:

• a detection element including a surface that faces a measurement object and configured to detect a temperature of the measurement object, a first direction being a direction of a first side of the surface, a second direction being a direction of a second side of the surface orthogonal to the first side, a third direction being a direction orthogonal to both of the first direction and the second direction, the detection element being disposed so as to face the measurement object in the third direction;
• a first holding member configured to hold the detection element;
• an urging member configured to urge the first holding member and extending in the first direction;
• a flexible member extending in the first direction and configured to support the first holding member on a first end portion of the flexible member in the first direction;
• and
• a second holding member configured to hold a second end portion of the flexible member in the first direction,
• wherein a first end portion of the urging member in the first direction is configured to be fixed to a holder to hold a unit including the detection element, the flexible member, the first holding member, and the second holding member, and a second end portion of the urging member opposite to the first end portion in the first direction is configured to come into contact with and press the first holding member,
• wherein the flexible member is flexible such that the first holding member and the second holding member are movable relative to each other in the third direction,
• wherein the second holding member includes a positioning portion configured to position the second holding member in the first direction and the second direction,
• wherein the first holding member is urged by the urging member toward the measurement object in the third direction, and
• wherein the second end portion of the urging member overlaps the surface of the detection element that faces the measurement object when viewed in the third direction.