Fixing device

摘要

A fixing device includes: a fusing member; a heater; a nip member; a reflection member; a stay; and a backup member. The fusing member has an inner peripheral surface defining an internal space and is circularly movable. The inner peripheral surface is in sliding contact with the nip member. The reflection member reflects a radiant heat from the heater toward the nip member. The reflection member includes a reflection portion and an extending portion. The stay covers the reflection portion and supports the nip member. The extending portion extends outside of the stay. The backup member provides a nip region in cooperation with the nip member upon nipping the tubular flexible fusing member between the backup member and the nip member. The extending portion extends between the nip member and the stay. The extending portion is positioned exclusively downstream of the reflection portion in a sheet feeding direction.

主权项

1. A fixing device comprising:
a tubular member; a heater extending inside the tubular member; a stay extending inside the tubular member; a reflection member disposed between the stay and the heater and configured to reflect radiant heat from the heater; a nip member extending inside the tubular member; and a backup member, the backup member and the nip member being configured to nip the tubular member therebetween to define a nip region between the tubular member and the backup member, wherein a sheet is to be fed in a feeding direction at the nip region, wherein the nip member has an upstream end in the feeding direction, wherein the stay is configured to support the nip member and comprises:
a central wall portion having an upstream end portion and a downstream end portion disposed at a downstream side relative to the upstream end portion in the feeding direction;an upstream wall portion extending from the upstream end portion of the central wall portion toward the reflection member; anda downstream wall portion that extends from the downstream end portion of the central wall portion toward the reflection member and is spaced apart from the upstream wall portion, and wherein the reflection member comprises:
a recessed portion recessed in a direction toward the central wall portion of the stay when viewed from a longitudinal direction of the heater, the recessed portion having an upstream end portion in the feeding direction; anda flange portion extending from the upstream end portion of the recessed portion to an upstream side relative to the recessed portion in the feeding direction, the flange portion having an exposed portion that is disposed at an upstream side relative to the upstream end of the nip member in the feeding direction and is exposed to an inner peripheral surface of the tubular member.