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Fixing device and image forming device

A developing device and image technology, applied to the electric recording process using the charge pattern, equipment and instruments for the electric recording process using the charge pattern, etc., can solve the problem of low thermal conductivity, etc.

Active Publication Date: 2021-06-22
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned fixing device, since the shielding member and the auxiliary heat-generating material are physically separated, the thermal conductivity is low

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 approach

[0017] like figure 1 As shown, the MFP 1 as the image forming apparatus of this embodiment includes: a fixing device 10; a scanner 12; an input and output unit 13; a laser exposure device 14; a paper feeding unit 17; an image forming unit 30; . The paper feeding unit 17 includes a paper feeding cassette that replenishes paper P as a printing medium. The MFP 1 includes a control device 50 that controls the above-mentioned components.

[0018] It should be noted that, for the convenience of description, set figure 1 The XYZ coordinate axes shown on the lower left.

[0019] The scanner 12 reads a document image for image formation by the MFP 1 . The scanner 12 has an input / output unit 13 . The input / output unit 13 is constituted by, for example, a touch panel type input / output device and a keyboard. With such a physical configuration, the input / output unit 13 accepts input from the user to the MFP 1 and outputs a screen display.

[0020] The paper feeding unit 17 includes:...

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PUM

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Abstract

The present invention relates to a fixing device and an image forming device which have high thermal conductivity and less unevenness in temperature. The fixing device includes: a coil; a fixing belt adjacent to the coil and including a heat generating layer heated by the magnetic flux of the coil; at least a part of an auxiliary heat generating material in contact with the fixing belt from the inside and heated by the magnetic flux generated by the coil. Moreover, it also has a shielding material, at least a part of which is in contact with the auxiliary heating material from the inside, and shields the magnetic flux generated by the coil, and has a first opening as a passage for contacting the auxiliary heating material from the inside of the shielding material, and is located opposite to the auxiliary heating material. The second opening is at a position substantially line-symmetrical to the first opening on an axis passing through the center point of the coil which is perpendicular to the rotation direction of the fixing belt. Furthermore, there is a safety device that detects the temperature by contacting the auxiliary heating material through the first opening of the shielding material, and suppresses the magnetic flux of the coil when the detected temperature exceeds a specific temperature.

Description

technical field [0001] The present invention relates to a fixing device and an image forming device having high thermal conductivity and little temperature variation. Background technique [0002] Among image forming apparatuses such as copiers and MFPs (Multi-Function Peripherals: Multi-Function Peripherals), some image forming apparatuses include a fixing device that heats paper on which a toner image has been transferred to fix the image. [0003] Regarding the heating of the fixing device, safety devices have been developed to prevent abnormal temperature rise. The fixing device measures the temperature of the auxiliary heat-generating material, and stops heating when abnormal heating is sensed. In this fixing device, since the shielding material and the auxiliary heat-generating material are physically separated, the thermostat for temperature measurement can freely contact the auxiliary heat-generating material that is the measurement target of temperature. [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/2039G03G15/205G03G2215/2035G03G15/2053
Inventor 冈野义明古山昇河岛裕树
Owner KK TOSHIBA