Fuser unit

摘要

A fuser unit includes: a cylindrical member; a heat generation member; a nip plate; a backup member that forms a nip portion; and a temperature detection member that detects a temperature of the nip plate. The nip plate has: a plate-shaped part that forms the nip portion; a lubricant restraint part that is formed on at least a part of a downstream side end of the plate-shaped part in a predetermined direction and that extends toward an inner side in a diametrical direction of the cylindrical member, and a detected part that extends from an end of the lubricant restraint part toward the predetermined direction. The detected part is formed to be shorter than the plate-shaped part in an axial direction of the cylindrical member, and both ends of the detected part in the axial direction are adjacent to a space.

主权项

1. A fuser unit, which heat-fixes a developer image on a recording sheet while moving the recording sheet in a predetermined direction, the fuser unit comprising:
a cylindrical member having flexibility; a heat generation member that is arranged at an inside of the cylindrical member; a nip plate that is arranged at the inside of the cylindrical member and to which radiation heat from the heat generation member is applied; a backup member that forms a nip portion by sandwiching the cylindrical member between the nip plate and the backup member; a lubricant that is provided to an inner periphery of the cylindrical member; and a temperature detection member that detects a temperature of the nip plate, wherein the nip plate has: a plate-shaped part that forms the nip portion; a lubricant restraint part that is formed on at least a part of a downstream side end of the plate-shaped part in the predetermined direction and that extends toward an inner side in a diametrical direction of the cylindrical member; and a detected part that extends from an end of the lubricant restraint part toward the predetermined direction, wherein a temperature of detected part is detected by the temperature detection member, wherein the detected part is formed to be shorter than the plate-shaped part in an axial direction of the cylindrical member, and both ends of the detected part in the axial direction are adjacent to a space, and wherein a bent part, which has a curvature radius larger than that of a bent part between the plate-shaped part and the lubricant restraint part, is provided at an upstream side of the plate-shaped part in the predetermined direction.