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Fixing device and image forming device having same

A technology of image and fixing components, applied in the fields of fixing devices and image forming devices, can solve the problems of maintaining the distance between the rotation centers of two gears, reducing the transmission efficiency of driving force, etc.

Active Publication Date: 2020-09-08
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned drive transmission device, since the driven gear and the fixing roller drive gear are arranged on different parts, it is difficult to maintain the distance between the centers of rotation of the two gears (center-to-center distance) with high accuracy.
Therefore, the transmission efficiency of driving force may decrease

Method used

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  • Fixing device and image forming device having same
  • Fixing device and image forming device having same
  • Fixing device and image forming device having same

Examples

Experimental program
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Embodiment Construction

[0015] Next, preferred embodiments of the present invention will be described with reference to the drawings. In addition, below, it demonstrates based on the direction shown in each figure.

[0016] refer to figure 1 , the printer 1 as an image forming apparatus will be described. figure 1 is a cross-sectional view schematically showing the internal structure of the printer 1 .

[0017] The printer 1 has an apparatus main body 2 , a paper feed cassette 3 and a paper output tray 4 . The sheet feeding cassette 3 is provided in a lower portion of the apparatus main body 2 so as to be insertable and extractable in the front-rear direction. In the sheet feeding cassette 3 , (a stack of) sheets S cut to a certain size are housed. The output tray 4 is disposed on the upper surface of the device main body 2 .

[0018] In addition, the printer 1 has a paper feeding unit 10 , an image forming unit 11 , a fixing device 12 , a paper output unit 13 , and a control device 14 . The pa...

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PUM

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Abstract

The invention provides a fixing device and an image forming device having the fixing device. The fixing device has: a pressure roller that forms a fixing nip with the fixing belt; a fixing frame that supports the rotatable fixing belt; a pressure frame that supports the rotatable pressure roller; and a pressure changing unit that changes The pressure of the fixing nip part; the rotation detection part which detects the rotation of the pressure roller; and the rotation transmission part which transmits the rotation of the pressure roller to the rotation detection part, and the fixing frame is rotatably supported by a fulcrum pin , wherein the fulcrum pin is provided on the pressure frame, the pressure changing part rotates the fixing frame around the fulcrum pin, and the rotation transmission part includes: a first gear, which is provided on the core material of the pressure roller; and a second gear, This engages with the first gear and is rotatably supported by the fulcrum pin.

Description

technical field [0001] The present invention relates to a fixing device for fixing a toner image on a sheet, and an image forming apparatus having the fixing device. Background technique [0002] An electrophotographic image forming apparatus has a fixing device including a pressure roller that is in pressure contact with a heated fixing roller. The fixing device has a pressure changing unit for changing the pressure acting on the fixing nip between the fixing roller and the pressure roller. The pressure changing unit changes the pressure of the fixing nip by rotating the frame holding the fixing roller about a fulcrum. [0003] In addition, the fixing device has a rotation detection unit for detecting the rotation of the pressure roller through a plurality of gears. The rotation detection unit detects the rotation of the pressure roller as the rotation of the fixing roller. According to this, the fixing roller is prevented from being locally heated in a stopped state. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/2017G03G15/2032G03G15/2064G03G15/206
Inventor 酒井雄大
Owner KYOCERA DOCUMENT SOLUTIONS INC