Fixing device provided with temperature detection unit

摘要

A fixing device may include: a nip member; an endless belt; a heater; a temperature detection unit; and a biasing member. The endless belt may circularly move such that an inner peripheral surface thereof may move in a sliding direction at a position in sliding contact with the nip member. The temperature detection unit may include: a temperature sensor and a holder. The temperature sensor may detect a temperature of the inner peripheral surface and may include: a base and a sensor element supported at the base. The holder may support the base and may have a guide surface for guiding the inner peripheral surface. The guide surface may be disposed on at least one of first and second sides of the temperature sensor in a first direction extending along an axis of the endless belt. The biasing member may bias the holder toward the inner peripheral surface.

主权项

1. A fixing device comprising:
a nip member elongated in a first direction; an endless belt having an inner peripheral surface, the endless belt having a first end in the first direction and a second end opposite to the first end in the first direction, the endless belt being configured to circularly move such that the inner peripheral surface moves in a sliding direction at a position where the inner peripheral surface is in sliding contact with the nip member; a heater configured to heat the endless belt; a temperature detection unit comprising:
a temperature sensor configured to detect a temperature of the inner peripheral surface, the temperature sensor comprising:
a base having a dimension in the first direction; anda sensor element supported at the base; anda holder having a base portion disposed opposite to the sensor element with respect to the base of the temperature sensor, the base portion of the holder having a dimension in the first direction greater than the dimension of the base of the temperature sensor in the first direction, the base portion of the holder supporting the base of the temperature sensor, the holder having a first guide portion protruding from the base portion of the holder toward the inner peripheral surface, the first guide portion having a first guide surface configured to guide the inner peripheral surface, the first guide surface being disposed on a first side of the temperature sensor in the first direction, the holder being spaced apart from the sensor element; and a biasing member configured to bias the base portion of the holder toward the inner peripheral surface.