TEMPERATURE SENSOR FOR FIXATION ROLLER

摘要

PROBLEM TO BE SOLVED: To provide a temperature sensor for fixation roller capable of measuring a correct temperature even when the position of a fixation roller is changed according to the thickness of a paper.SOLUTION: A temperature sensor for fixation roller includes: a pair of lead frames 2; and a sensor part 3 held between the pair of lead frames. The sensor part includes: a band-like insulating film 4 holding the sensor part between the pair of lead frames; a thin film thermistor part 5 pattern-formed by a thirstier material on the surface of the insulating film; and a pair of pattern electrodes 6 formed on a surface of the insulating film of which the top end side is formed on the thin film thermistor part and the base end side is connected to the pair of lead frame. The thin film thermistor is arranged at least at a central part of the region corresponding to a range contactable with the fixation roller of the sensor part in the extending direction of the insulating film, and the pair of pattern electrodes extends across the entire region corresponding to the range contactable with the fixation roller of at least the sensor part in the extending direction of the insulating film.SELECTED DRAWING: Figure 1