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Rotation detection mechanism, fixing device and image forming device

A technology of rotating detection and rotating shaft, which is applied to the electric recording process applying charge pattern, equipment and instruments of electric recording process applying charge pattern, etc. problem, to achieve the effect of suppressing poor rotation detection and reducing sliding load

Active Publication Date: 2020-05-29
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although the temperature detection sensor for detecting the surface temperature of the roller or belt is arranged, if the arrangement position of the induction heating part and the temperature detection sensor are different in the circumferential direction, the abnormal temperature rise cannot be detected, and thermal deformation of the roller or belt may occur. smoke, fire

Method used

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  • Rotation detection mechanism, fixing device and image forming device
  • Rotation detection mechanism, fixing device and image forming device
  • Rotation detection mechanism, fixing device and image forming device

Examples

Experimental program
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Embodiment Construction

[0025] Embodiments of the present invention will be described below with reference to the drawings. figure 1 It is a schematic cross-sectional view of an image forming apparatus equipped with a fixing device of the present invention, and shows a tandem color printer here. In the main body of the color printer 100, from the upstream side in the transport direction ( figure 1 The left side in the figure) is provided with four image forming portions Pa, Pb, Pc, and Pd in ​​sequence. The above-mentioned image forming portions Pa to Pd are provided corresponding to images of four different colors (cyan, magenta, yellow, and black), and sequentially form cyan, magenta, Yellow and black image.

[0026] The image forming sections Pa to Pd are provided with photosensitive drums 1a, 1b, 1c, and 1d carrying visible images (toner images) of respective colors, and the intermediate transfer belt 8 is driven by a driving mechanism (not shown). figure 1 Rotating in the counterclockwise dir...

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PUM

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Abstract

A rotation detection mechanism has a pulse plate, an optical sensor, a holder, and an input gear. The pulse plate has a light-blocking portion formed on an outer peripheral surface thereof. The optical sensor has a detection portion that detects whether an optical path thereof is opened or interrupted by the light-blocking portion of the pulse plate. The holder has a bearing hole that rotatably supports a rotary shaft of the pulse plate. The rotary shaft has a convex portion formed on an outer peripheral surface thereof and thus is in a key shape when seen from an axial direction thereof. On an inner peripheral surface of the bearing hole, a groove portion is formed through which the convex portion passes when the rotary shaft is inserted into the bearing hole, and the bearing hole is in a circular shape when seen from an axial direction thereof.

Description

technical field [0001] The present invention relates to a rotation detection mechanism for detecting rotation of a heated rotating body such as a fixing roller, which is applied to a fixing device mounted on an image forming device such as a copier or a printer to fix an unfixed toner image. Background technique [0002] In an electrophotographic image forming apparatus, a roller heating method is widely used: at least one roller (fixing roller) of a roller pair forming a nip is heated, and a recording medium (paper) carrying an unfixed toner image is heated. ) passes through the nip of the roller pair, thereby fixing the toner on the recording medium. In addition, the following belt heating method is also used: instead of the fixing roller, an endless fixing belt is used, the fixing belt is heated by a heating mechanism, and the unfixed toner image is transferred to the nip between the fixing belt and the pressure roller by means of the fixing belt. fixed to the recording ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/2064G03G15/2053G03G2215/0132G03G2215/2035G03G15/2039
Inventor 森园幸纪
Owner KYOCERA DOCUMENT SOLUTIONS INC
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