Fixing device provided with slide sheet fixed between support portions and image forming device including fixing device

Patent metadata

Field	Value
Publication number	US-11586134-B2
Application number	US-202117351738-A
Country	US
Kind code	B2
Filing date	Jun 18, 2021
Priority date	Jul 15, 2020
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

A fixing device includes an endless fixing belt capable of rotational movement, a pressure roller that presses from the outside of the fixing belt, a nip forming member that is arranged on an inner circumference surface side of the fixing belt and forms a fixing nip region between the fixing belt and the pressure roller, a support member that supports the nip forming member from an opposite side to the fixing nip region, and a slide sheet provided between the fixing belt and the nip forming member. The support member includes two support portions. The slide sheet is fixed between the two support portions.

First claim

What is claimed is:

1. A fixing device comprising:
an endless fixing belt capable of rotational movement;
a pressure roller that presses from an outside of the fixing belt;
a nip forming member that is arranged on an inner circumference surface side of the fixing belt and forms a fixing nip region between the fixing belt and the pressure roller;
a support member that supports the nip forming member from an opposite side to the fixing nip region; and
a slide sheet provided between the fixing belt and the nip forming member,
wherein the support member comprises two support portions, and the slide sheet is fixed between the two support portions, and
wherein a concave portion is provided in one of the two support portions, a convex portion engaged with the concave portion is provided in the other of the two support portions, and the slide sheet is fixed by the convex portion engaged with the concave portion.

2. The fixing device according to claim 1 ,
wherein the slide sheet is fixed in a state of being sandwiched between the two support portions.

3. The fixing device according to claim 1 ,
wherein the concave portion is a hole through which the convex portion is inserted.

4. The fixing device according to claim 1 ,
wherein the slide sheet is provided with a hole through which the convex portion is inserted.

5. A fixing device comprising:
an endless fixing belt capable of rotational movement;
a pressure roller that presses from an outside of the fixing belt;
a nip forming member that is arranged on an inner circumference surface side of the fixing belt and forms a fixing nip region between the fixing belt and the pressure roller;
a support member that supports the nip forming member from an opposite side to the fixing nip region; and
a slide sheet provided between the fixing belt and the nip forming member, where:
the support member comprises two support portions, and the slide sheet is fixed between the two support portions,
each of the two support portions comprising a first cohesion surface and a second cohesion surface, the two first cohesion surfaces being in close contact with each other via the slide sheet and the two second cohesion surfaces being in close contact with the nip forming member via the slide sheet,
the slide sheet is fixed between the first cohesion surface in the one support portion and the first cohesion surface in the other support portion, and
the first cohesion surfaces of the one support portion and the other support portion extend in an intersecting direction intersecting with the second cohesion surfaces of the one support portion and the other support portion.

6. A fixing device comprising:
an endless fixing belt capable of rotational movement;
a pressure roller that presses from an outside of the fixing belt;
a nip forming member that is arranged on an inner circumference surface side of the fixing belt and forms a fixing nip region between the fixing belt and the pressure roller;
a support member that supports the nip forming member from an opposite side to the fixing nip region; and
a slide sheet provided between the fixing belt and the nip forming member, where:
the support member comprises two support portions, and the slide sheet is fixed between the two support portions,
each of the two support portions comprising a first cohesion surface and a second cohesion surface, the two first cohesion surfaces being in close contact with each other via the slide sheet, and the two second cohesion surfaces being in close contact with the nip forming member via the slide sheet,
the slide sheet is fixed between the first cohesion surface in the one support portion and the first cohesion surface in the other support portion, and
the support member is formed in a T-shape in a cross-sectional view by the two support portions.

7. A fixing device comprising:
an endless fixing belt capable of rotational movement;
a pressure roller that presses from an outside of the fixing belt;
a nip forming member that is arranged on an inner circumference surface side of the fixing belt and forms a fixing nip region between the fixing belt and the pressure roller;
a support member that supports the nip forming member from an opposite side to the fixing nip region; and
a slide sheet provided between the fixing belt and the nip forming member, where:
the support member comprises two support portions, and the slide sheet is fixed between the two support portions,
each of the two support portions comprising a first cohesion surface and a second cohesion surface, the two first cohesion surfaces being in close contact with each other via the slide sheet, and the two second cohesion surfaces being in close contact with the nip forming member via the slide sheet,
the slide sheet is fixed between the first cohesion surface in the one support portion and the first cohesion surface in the other support portion, and
each of the two support portions is an L-shaped support portion in a cross-sectional view, and a straight portion on one side of the L-shape of the one support portion and a straight portion on one side of the L-shape of the other support portion face each other, so that the support member is formed in a T-shape.

8. The fixing device according to claim 1 ,
wherein the slide sheet comprises:
a first sheet portion that covers the nip forming member in a circumferential direction around a rotational axis of the fixing belt;
a second sheet portion juncturally connected to an upstream end of the first sheet portion in the circumferential direction in a conveying direction of a recording medium; and
a third sheet portion juncturally connected to a downstream end of the first sheet portion in the circumferential direction in the conveying direction of the recording medium,

wherein the second sheet portion and the third sheet portion are fixed between the two support portions.

9. The fixing device according to claim 1 ,
wherein the slide sheet comprises:
a first sheet portion that covers the nip forming member in a circumferential direction around a rotational axis of the fixing belt; and
a second sheet portion juncturally connected to an upstream end of the first sheet in the circumferential direction in a conveying direction of a recording medium,
wherein the second sheet portion is fixed between the two support portions.

10. An image forming device comprising the fixing device according to claim 1 .

Assignees

• Sharp Kk

Inventors

• Maeda Tomohiro

Classifications

• G03G2215/2038

  the belt further entrained around one or more rotating belt support members · CPC title

• G03G15/2064

  combined with pressure · CPC title

• G03G15/2053 Primary

  Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating · CPC title