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Fusing device of electro-photographic image forming apparatus having temperature sensor protecting structure

A technology of temperature sensor and imaging equipment, which is applied to equipment of electric recording process applying charge pattern, parts of thermometer, thermometer, etc., can solve the problems of impossible temperature detection, damage of leaf spring 22, difficulty in accurately measuring temperature, etc.

Inactive Publication Date: 2007-04-18
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, when a paper jam occurs so that a piece of paper stays in the fixing device 10, the leaf spring 22 may be damaged in the process of removing the jammed paper.
This is because the cantilever beam type leaf spring 22 has a relatively narrow range of elastic deformation, which is prone to permanent deformation
If the temperature sensor 21 is separated from the outer peripheral surface of the heating roller 11, it is impossible to detect the temperature correctly, resulting in overheating of the fixing rollers 11 and 13.
[0008] Second, since the temperature sensor 21 is disposed on the outer surface of the leaf spring 22 and thus exposed to the air, it is difficult to measure the temperature accurately

Method used

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  • Fusing device of electro-photographic image forming apparatus having temperature sensor protecting structure
  • Fusing device of electro-photographic image forming apparatus having temperature sensor protecting structure
  • Fusing device of electro-photographic image forming apparatus having temperature sensor protecting structure

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Embodiment Construction

[0021] Features of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] 2 is a sectional front view of an image forming apparatus employing a fixing device according to an exemplary embodiment of the present invention, and FIG. 3 is a sectional front view of the fixing device according to an exemplary embodiment of the present invention. Referring to FIG. 2 , the image forming apparatus includes a printing unit 100 that prints an image on paper P using an electrophotographic process, and a paper cassette 120 that stacks the paper P. Referring to FIG.

[0023] The paper cassette 120 is detachably installed under the frame 101 and includes a plate 111 for supporting paper P and a spring 112 for applying an upward elastic force to the plate 111 . Pickup rollers 113 that pick up sheets P are installed on the paper cassette 120 one by one. The paper P picked up by the pickup roller 113 is conveyed to the printing unit 100 by...

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Abstract

A fusing device of an electro-photographic image forming apparatus is provided having a temperature sensor protecting structure. The fusing device includes a heat roller having a heater and a pressure roller rotating opposed to the heat roller. A temperature sensor housing accommodates a contact-type temperature sensor. A coil spring elastically presses the temperature sensor housing such that the contact-type temperature sensor contacts the outer circumferential surface of the heat roller.

Description

technical field [0001] The present invention relates to a fixing device of an electrophotographic image forming apparatus. More particularly, the present invention relates to a fixing device of an electrophotographic image forming apparatus having a temperature sensor protection structure that protects a contact type temperature sensor and ensures stable contact between the contact type temperature sensor and a heating roller. Background technique [0002] In general, image forming apparatuses such as laser beam printers, LED printers, digital copiers, and facsimiles transfer images as visible images onto paper based on digital signals input from computers or scanners. [0003] An electrophotographic image forming apparatus exposes a digital signal representing a desired image into a predetermined pattern, forms an electrostatic latent image corresponding to the desired image on the peripheral surface of a photoreceptor, and develops the latent image with a powdery toner to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G2221/1639G03G15/2071G03G15/2078G03G2221/1675G03G15/2035G03G15/2039G01K13/08G01K1/08
Inventor 薛光朝
Owner SAMSUNG ELECTRONICS CO LTD