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Fixing device and image forming device

A toner image and clamping technology, which is applied in the fields of image forming devices and fixing devices, can solve the problems of complicated structure of heat insulation parts, abnormal sound generation, bending of heat insulation parts, etc.

Active Publication Date: 2019-05-07
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, as described above, if a notch is provided on the heat insulating member, during the operation of fixing the toner image on the recording medium, the portion of the heat insulating member located around the notch may be bent. , may produce abnormal sound
In addition, in the above-mentioned fixing device, since the heat insulating member is composed of two parts, the structure of the heat insulating member is complicated.

Method used

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  • Fixing device and image forming device
  • Fixing device and image forming device
  • Fixing device and image forming device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0023] A first embodiment of the present invention will be described.

[0024] First, refer to figure 1 , the overall configuration of the color printer 1 (image forming apparatus) will be described.

[0025] The color printer 1 has a box-shaped printer body 2 , a paper feed cassette 3 for containing paper (recording medium) is provided at the lower part of the printer body 2 , and a paper output tray 4 is provided at the upper part of the printer body 2 .

[0026] In the center of the printer body 2 , an intermediate transfer belt 6 is attached between a plurality of rollers, and an exposure device 7 including a laser scanning unit (LSU) is disposed below the intermediate transfer belt 6 . On the lower side of the intermediate transfer belt 6 , four image forming units 8 corresponding to the colors of the respective toners (for example, four colors of magenta, cyan, yellow, and black) are provided. In each image forming section 8, a rotatable photosensitive drum 9 is provid...

no. 2 Embodiment approach

[0069] Next, a second embodiment of the present invention will be described. In addition, since the second embodiment has the same structure as that of the first embodiment except for the heat insulating bush 31 of the fixing device 20 , description thereof will be omitted.

[0070] In the first embodiment, the case where the groove portion 68 is provided along the circumferential direction of the heat insulating pad 31 has been described. In contrast, in this embodiment, if Figure 9 As shown, the groove portion 68 is provided along the front-rear direction of the heat insulating bush 31 (the direction of the rotation axis of the heat insulating bush 31 ). By employing such a structure, the groove portion 68 can be easily formed.

[0071] Additionally, if Figure 9 As shown, in this embodiment, a plurality of groove portions 68 are arranged at intervals in the circumferential direction of the heat insulating bush 31 . By employing such a structure, the contact area betwee...

no. 3 Embodiment approach

[0075] Next, a third embodiment of the present invention will be described. Since the structure of the third embodiment is the same as that of the first embodiment except for the heat insulating bush 31 of the fixing device 20 , description thereof will be omitted. In addition, the parts of the heat insulating bush 31 that are the same as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment in the drawings, and descriptions thereof are appropriately omitted.

[0076] Such as Figure 11 and Figure 12 As shown, on the heat insulating bearing pad 31 , on the outer peripheral surface of the bearing pad main body 62 , a groove portion 68 is provided at a portion in contact with the inner peripheral surface of the inner ring 57 of the bearing 30 , and the groove portion 68 is along the front-rear direction ( The direction of the rotation axis of the thermal insulation bearing bush 31) is set. The groove portions 68 are arrange...

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PUM

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Abstract

A fixing device includes a rotating member, a bearing and a heat insulating member. The rotating member fixes a toner image onto a recording medium. The bearing rotatably supports the rotating member. The heat insulating member is interposed between the rotating member and the bearing and rotated around a rotation axis. A notch part is arranged in a portion in a circumferential direction of the heat insulating member so as to continue from an end part at an inside to an end part at an outside in a direction of the rotation axis. At least one groove part is formed in a contact portion with the rotating member or the bearing in a circumference face of the heat insulating member.

Description

technical field [0001] The present invention relates to a fixing device for fixing a toner image on a recording medium, and an image forming apparatus having the fixing device. Background technique [0002] Conventionally, electrophotographic image forming apparatuses such as copiers and printers have fixing devices for fixing toner images on recording media such as paper. [0003] For example, in the prior art, there is a fixing device that has: a rotating member that fixes a toner image on a recording medium; and a bearing that supports the rotating member so that the rotating member Able to rotate; a heat insulating part, which is sandwiched between the rotating part and the bearing. [0004] In the fixing device having such a structure, when the toner image is fixed on the recording medium, the rotating member is heated and expanded. Along with this, the heat insulating member interposed between the rotating member and the bearing receives a large load, which may cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/2053G03G2215/2032
Inventor 松山辽山川智彦高木胜渊昌巳
Owner KYOCERA DOCUMENT SOLUTIONS INC