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Induction heating roller device for use in image forming apparatus

A technology of induction heating and heating roller, which is applied in the direction of induction heating, electric recording process equipment using charge graphics, induction heating devices, etc., and can solve problems such as wrong actions

Inactive Publication Date: 2004-08-25
HARISON TOSHIBA LIGHTING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned leakage current will generate common mode noise, causing malfunction of the image forming device and induction heating roller equipment

Method used

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  • Induction heating roller device for use in image forming apparatus
  • Induction heating roller device for use in image forming apparatus
  • Induction heating roller device for use in image forming apparatus

Examples

Experimental program
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Embodiment Construction

[0088] In the drawings, like numbers are used for like elements. The present invention will be described below with reference to the accompanying drawings.

[0089] figure 1 and 4 is a schematic circuit diagram of the induction heating roller apparatus according to the first embodiment of the present invention. figure 2 is a cross-sectional view of the induction coil and heating roller. image 3 is a cross-sectional view along line 3-3. Figure 4 is the circuit diagram of the high frequency power supply and matching circuit.

[0090] In this embodiment, the induction coil device includes an induction coil 1 , a heating roller 2 , a power factor improving capacitor 3 , a high frequency power supply 4 , a high frequency transmission line 5 , a matching circuit 6 , a coil tube 7 , and a rotating mechanism 8 . Each element will be described below.

[0091] [Induction coil 1]

[0092] refer to figure 2 and 3 , the induction coil 1 is wound on the coil former 7 and connec...

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PUM

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Abstract

An induction heating roller device that keeps leakage current within specifications and prevents the occurrence of erroneous operations caused by common mode noise. The induction heating roller device includes an induction coil (1), a grounded heating roller (2) magnetically coupled to the induction coil and heated by electro-magnetic induction. A power factor improving capacitor (3) is connected in parallel to and near the induction coil and has a grounded intermediate point. A high-frequency power source (4) biases the induction coil. The leakage current produced by distributed capacitance between the induction coil and the heating roller is returned to the high-frequency power source via the power factor improving capacitor. Thus, the leakage current does not flow out of the induction heating roller device.

Description

technical field [0001] The present invention relates to an induction heating roller device, a fixing device and an image forming apparatus equipped with the induction heating roller device. Background technique [0002] Generally, a heat roller using a halogen lamp as a heat source is used for thermally fixing the toner image. However, such heating sources require a long warm-up time and have insufficient heat capacity. Therefore, an induction heating method for solving such problems has been developed. [0003] As described in Japanese Patent Document No. 2002-222688, the present inventors have developed an image forming apparatus and a fixing apparatus using a transformer coupling type induction heating roller apparatus. The heating roller device includes a heating roller having a hollow structure, wherein an induction coil is coupled to an induction coil through a hollow hollow transformer, and is rotatably supported. The secondary-side resistance value of the heating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20H05B6/04H05B6/14
CPCG03G15/2053
Inventor 小笠原崇行土井洋幸横关一郎贵家学铃木俊也田中贵章前田祥平
Owner HARISON TOSHIBA LIGHTING CORP
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