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Fixing device and image forming apparatus

An image carrier and a predetermined distance technology, which is applied in the field of image forming devices and fixing devices, and can solve problems such as temperature rise of the heating rotating body

Inactive Publication Date: 2012-12-26
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in a fixing device having a magnetic core portion whose magnetic permeability decreases when reaching the above-mentioned Curie temperature, compared with the case where a magnetic flux shielding member or a degaussing coil is used to reduce or shield the magnetic flux generated by the induction coil Possibility of the temperature of the heating rotor rising in the non-passing paper area

Method used

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

Examples

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings. pass figure 1 The overall configuration of the printer 1 as the image forming apparatus of the first embodiment will be described. figure 1 It is a diagram for explaining the arrangement of each component of the printer 1 according to the first embodiment of the present invention.

[0027] Such as figure 1 As shown, the printer 1 of the first embodiment includes an apparatus main body M. As shown in FIG. The apparatus main body M includes an image forming unit GK and a paper feeding and discharging unit KH. The image forming unit GK forms a toner image on a sheet-shaped sheet of paper T serving as a transfer target material based on the image information. The paper supply and discharge section KH supplies the paper T to the image forming section GK, and discharges the paper T on which the toner image is formed. The outer shape of the apparatus main body M is constitu...

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Abstract

Provided are a fixing device and an image forming apparatus. The fixing device includes a heating rotor, a pressure rotor, an induction coil, and a magnetic core portion having a bypass core portion and a magnetic flux shielding member. The induction coil generates a magnetic flux to heat the heating rotor. A Curie point of the bypass core portion is higher than the temperature of the bypass core portion when the temperature of the heating rotor has reached a fixing temperature for T fixing of the transfer material and lower than the temperature of the bypass core portion when the temperature of the heating rotor has reached a heat-resistant temperature. The magnetic flux shielding member is configured about the periphery of the bypass core portion in close proximity or abutment with the bypass core portion. Besides, the image forming apparatus comprises the fixing device, and can further inhibit the temperature of non-paper-through portion of the heating rotor of the fixing device from rising overly.

Description

technical field [0001] The present invention relates to a fixing device and an image forming device including the fixing device. Background technique [0002] Conventionally, in an image forming apparatus, a belt-type fixing device capable of reducing heat capacity has attracted attention. In addition, in recent years, an electromagnetic induction heating (IH, induction heating) method that has the possibility of rapid heating and high-efficiency heating has attracted attention. [0003] In the fixing device of the electromagnetic induction heating method, there is a technique for suppressing an excessive rise in the temperature of an area (non-paper passing area, second area) outside the paper passing area (first area) through which the paper passes. The width of the paper (transferred material) (passing through) to the fixing device (the width of the paper in the direction perpendicular to the conveying direction of the paper: the passing paper width) is adjusted accordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/20G03G15/00G03G15/2053G03G15/2042G03G15/2057
Inventor 森口元树
Owner KYOCERA DOCUMENT SOLUTIONS INC
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