摘要:
A fixing device for thermally fixing a developing agent image to a sheet includes: a flexible tubular member having an inner peripheral surface, the tubular member defining an axis extending in an axial direction and having widthwise end portions in the axial direction; a heater; a nip member being in sliding contact with the inner peripheral surface; a backup member confronting the nip member to nip the tubular member in cooperation with the nip member; a stay supporting the nip member; a pair of inner guides being in sliding contact with the inner peripheral surface to guide the same; and a pair of restricting members restricting the widthwise end portions of the tubular member from moving in the axial direction, at least one of the pair of restricting members being formed separately from the inner guides and being assembled to the stay in a direction perpendicular to the axial direction.
摘要:
A fixing device includes: a tubular member; a heater; a nip member; a stay; and a backup member. The heater including: a glass tube; and a heat source. The nip member confronts the heater in a confronting direction. The glass tube has an axis defining an axial direction. The glass tube includes a glass tube body having end portions in the axial direction and sealed portions formed integrally with the end portions. Each sealed portion is formed in a plate shape and protrudes radially outwardly from the glass tube body when viewing in the axial direction. Each sealed portion is oriented in a first direction and defines a cross-sectional distance between one end portion and another end portion of the sealed portion in the confronting direction greater than a cross-sectional length of the glass tube in a second direction perpendicular to the confronting direction and the axial direction.
摘要:
A fixing device includes: a tubular member; a heater; a nip member including a base portion, a connecting portion, and a flange portion; a backup member; and a guide member. The tubular member is circularly movable in a circularly-moving direction. The guide member has a part positioned upstream of the nip member in the circularly-moving direction and configured to guide the tubular member. The part has an end portion containing a most downstream end at which the tubular member is directed to a position between the nip member and the backup member. The nip member and the guide member define a first imaginary plane containing a line connecting a first curved portion provided by a boundary region between the connecting portion and the base portion, and the most downstream end. The first imaginary plane is positioned opposite to the heater relative to a first end of the flange portion.
摘要:
A fixing device includes, a belt, and a plate. The belt has a first surface and a second surface opposite to the first surface. The plate is made of metal and has a sliding surface that is configured to slide on the first surface of the belt in a predetermined direction. The sliding surface of the plate has roll marks that extend along the predetermined direction.
摘要:
A fixing device includes: a first fixing member and a second fixing member forming a nip portion for heat-fixing a recording sheet; an urging mechanism including an urging member and urging the first fixing member toward the second fixing member by an urging force of the urging member; a first frame for supporting the second fixing member; a second frame arranged at an opposite side to the second fixing member with the first fixing member being interposed therebetween; and a switching member, which applies a pressing force resisting the urging force to the first fixing member for switching a width of the nip portion, and which includes a cam to which the urging force is applied and a shaft for supporting the cam. The first frame and the second frame are connected to each other by the shaft.
摘要:
A fuser unit, which heat-fixes a developer image on a recording sheet, the fuser unit including: a cylindrical member having flexibility; a heat generation member; a nip member; a stay; a first frame; a second frame, and a wiring, wherein the first frame is provided with a pair of openings through which both axial end sides of the stay are exposed, wherein the second frame is configured to cover a central portion of the wiring, which is positioned at an inward side more than the pair of openings in the axial direction, wherein both axial sides of the second frame are provided with pressing protrusions that directly press the stay through the openings, and wherein both axial sides of the second frame are provided with third frames that cover a part of the wiring arranged at both axial end sides of the first frame.
摘要:
A fuser unit, which heat-fixes a developer image on a recording sheet, the fuser unit comprising: a cylindrical member having flexibility; a heat generation member; a nip member; a stay; a first frame; a second frame, and a wiring, wherein the first frame is provided with a pair of openings through which both axial end sides of the stay are exposed, wherein the second frame is configured to cover a central portion of the wiring, which is positioned at an inward side more than the pair of openings in the axial direction, wherein both axial sides of the second frame are provided with pressing protrusions that directly press the stay through the openings, and wherein both axial sides of the second frame are provided with third frames that cover a part of the wiring arranged at both axial end sides of the first frame.
摘要:
There is provided a fixing device for thermally fixing a developing agent image to a sheet. The fixing device includes a tubular flexible member, a heater, a nip member, a reflection plate, a backup member, a stay and a temperature sensor. The flexible member has an inner peripheral surface defining an internal space. The heater is disposed in the internal space and is configured to generate a radiant heat. The nip member is disposed in the internal space, the inner peripheral surface being in sliding contact with the nip member. The reflection plate is configured to reflect the radiant heat from the heater toward the nip member, the reflection plate having an outer profile. The backup member is configured to provide a nip region in cooperation with the nip member for nipping the flexible member between the backup member and the nip member. The stay covers the reflection plate and supports the nip member, the stay having a profile in conformance with the outer profile of the reflection plate, and the stay being formed with one of a through-hole and a notch. The temperature sensor is disposed in the internal space and extends through the one of the through-hole and the notch.
摘要:
A fixing device for thermally fixing an image to a sheet includes: a tubular flexible member; a nip member; a heater; a reflection member; a backup member; and a temperature sensor. The tubular flexible member has an inner peripheral surface defining an internal space. The nip member is disposed in the internal space and has a surface and an opposite surface. The heater is disposed in the internal space confronting the nip member. The reflection member is configured to reflect radiant heat from the heater toward the nip member. The backup member may provide a nip region with the nip member for nipping the tubular flexible member between the backup member and the nip member. The temperature sensor is disposed in the internal space and is configured to detect a temperature of the nip member. The temperature sensor is positioned outside of the reflection member and confronting the opposite surface.
摘要:
A fixing device includes a heating element disposed inside a flexible fusing member, a nip member disposed to contact with a surface of the flexible fusing member and to allow the flexible fusing member to slide along the nip member, a reflecting plate for reflecting radiant heat from the heating element toward the nip member, and a backup member for nipping the flexible fusing member with the nip member. The reflecting plate includes a central reflecting portion extending along a longitudinal direction of the heating element at least in a region corresponding to along a heat generating portion of the heating element, and end reflecting portions stationarily provided on both ends of the central reflecting portion. The end reflecting portions are disposed in positions longitudinally outward of the heat generating portion and each has a reflecting surface tilted with respect to the longitudinal direction of the heating element.