Laser fixing device and image forming apparatus
A laser and transmission device technology, which is applied in the electrical recording process using charge patterns, the equipment and optics of the electric recording process using charge patterns, etc., can solve the problem that smoke cannot be detected, smoke cannot be detected, and smoke detection accuracy is not good. advanced questions
Inactive Publication Date: 2011-05-18
SHARP KK
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Problems solved by technology
[0010] However, in the fixing device of Patent Document 3, the scattering of the above-mentioned scattered light changes depending on the state of the smoke and the amount of the smoke, so even if the smoke is emitted, the scattered light may not enter the light receiving part, and the occurrence of the smoke cannot be detected.
Also, there are cases where the amount of scattered light incident on the light receiving part is too small to detect the generation of smoke even if smoke is emitted.
That is, the fixing device of Patent Document 3 has a problem that the detection accuracy of detecting smoke generated from paper is not high.
Method used
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[0025] Embodiments of the present invention will be described in detail below. First, before describing the fixing device of this embodiment, a multifunction peripheral (image forming apparatus) including the fixing device will be described. Figure 6 It is a block diagram showing a schematic configuration of the multifunction peripheral of this embodiment.
[0026] The multifunction peripheral 700 is an image forming apparatus having a scanning function, a copying function, a printing function, a facsimile function, an image archiving function, and the like. Copier 700 AS Figure 6 As shown, there are a scanner 701, a peripheral device 702, and a printer 703.
[0027] The scanner 701 has a reading unit 605 that reads a document and generates an image signal (analog signal).
[0028] The printer 703 is a color printing device of a dry electrophotographic method and a four-stage tandem method, and prints images on paper (recording paper) based on image data transmitted from ...
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The invention relates to a laser fixing device and an image forming apparatus. The laser fixing device includes: a laser radiating section for radiating laser light to a sheet so that a toner image on the sheet is fixed to the sheet, an optical sensor, and a smoke detecting section. The optical sensor includes a light radiating section for radiating light with a predetermined wavelength and a light receiving section for receiving the light with a predetermined wavelength so as to output a signal corresponding to a received amount of the light with a predetermined wavelength. The light radiating section and the light receiving section are positioned in such a manner that the light radiating section and the light receiving section face each other with a light path of the laser light therebetween, and light radiated from the light radiating section crosses the light path of the laser light and then reaches the light receiving section. The smoke detecting section detects smoke in the fixing device based on the signal. Thus, the laser fixing device can detect smoke with high accuracy.
Description
technical field [0001] The present invention relates to a fixing device for thermally fixing a toner image transferred onto a sheet of paper by irradiating laser light to the toner image. Background technique [0002] An electrophotographic image forming apparatus is provided with a fixing device that fixes a toner image formed on a sheet of paper by thermally fusing it. As an example of such a fixing device, a device is known in which a toner image is thermally fused and fixed to a paper (recording paper) by irradiating light to the unfixed toner image on the paper. This method is different from the heat roller type fixing device, and the toner image is heated without contacting the heat source. And this method is different from the heat roller type fixing device, and it is characterized in that no preheating is required. [0003] Also, Patent Document 1 discloses a laser fixing device that fixes toner using laser energy as a device that fixes a toner image with light. P...
Claims
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IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/2007G03G21/206G03G21/20
Inventor 前田智弘
Owner SHARP KK