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Fixing device and image forming apparatus using the same

An image and fixing roller technology, which is applied in the field of image forming equipment and fixing devices, can solve problems such as fixing failure and heat energy loss of fixing devices, and achieve the effects of preventing heat radiation, preventing heat leakage, and reducing heat loss

Active Publication Date: 2012-05-23
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, since heat radiation from the surface of the fixing belt is non-negligible in areas other than the area where the curved plate-shaped heater exists, the fixing device of Patent Document 1 has a problem of heat energy loss, resulting in failure of fixing

Method used

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  • Fixing device and image forming apparatus using the same
  • Fixing device and image forming apparatus using the same
  • Fixing device and image forming apparatus using the same

Examples

Experimental program
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example 1

[0120] Next, an example of the fixing unit 12 of the present embodiment will be described with reference to the drawings.

[0121] image 3 is a schematic diagram showing the configuration of Example 1 of the fixing member constituting the fixing unit of the present embodiment. Figure 4A It is a schematic diagram showing the layered structure of the heating member constituting the fixing member of the fixing unit of the present embodiment. Figure 4B is a schematic plan view showing the pattern of the heating member.

[0122] The fixing unit 120 of Example 1 has the same overall configuration as that of the fixing unit 12 of the embodiment. In the description of the fixing unit 120 , the same components as those of the fixing unit of the embodiment are assigned the same reference numerals and will not be described again.

[0123] In the fixing unit 120 of Example 1, as the fixing belt 121 of the fixing member 120a, a belt-shaped member having a diameter of 36 mm and made o...

example 2

[0143] Next, another configuration of the fixing unit 12 of the present embodiment will be described using Example 2 with reference to the drawings.

[0144] Figure 5 is a schematic diagram showing the configuration of Example 2 of the fixing member constituting the fixing unit of the present embodiment. Figure 6 is a schematic plan view showing the pattern of the heating member of the fixing unit.

[0145] The fixing unit 220 of Example 2 has the same configuration as that of the fixing unit of Example 1 except for the structure of the heating member 223 . Therefore, in the description of the fixing unit 220 , the same components as those of the fixing unit of Example 1 are assigned the same reference numerals and will not be described again.

[0146] Such as Figure 5 As shown, the fixing unit 220 of Example 2 is modified so that the distribution of heat generation from the heating member 223 (heater: curved plate-shaped heat generator) is non-uniform with respect to th...

example 3

[0158] Next, another configuration of the fixing unit 12 of the present embodiment will be described using Example 3 with reference to the drawings.

[0159] Figure 7 is a schematic diagram showing the configuration of Example 3 of the fixing member constituting the fixing unit of the present embodiment.

[0160] The fixing unit 320 of Example 3 has the same configuration as that of the fixing unit of Example 1 except for the configuration of the insulating member 330 . Therefore, in the description of the fixing unit 320 , the same components as those of the fixing unit of Example 1 are assigned the same reference numerals and will not be described again.

[0161] Such as Figure 7 As shown, in the fixing unit 320 of Example 3, the insulating member 330 shielding the outer peripheral side of the heating member 123 by the fixing belt 121 is disposed close to the outer peripheral side of the fixing belt 121 within the range where the fixing belt 121 contacts the heating memb...

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Abstract

An image forming apparatus includes photoreceptor drums, a charger, an exposure unit, a developing unit, an intermediate transfer belt and a fixing unit for fixing a toner image to a recording medium. The fixing unit includes a fixing part and a pressing part. The fixing part has a fixing roller, a heating member and a fixing belt. The pressing part has a pressing roller. The heating member is arranged close to, and so as to cover, the outer peripheral side of the fixing roller, and formed with an opening. Both edges of the opening extending along the axial direction of the fixing roller, are positioned closer to the pressing part side than the center axis of the fixing roller is.

Description

technical field [0001] The present invention relates to a fixing device and an image forming apparatus using the fixing device, and in particular, to an image forming apparatus using a fixing belt for use in an electrophotography-based A fixing device used in an image forming apparatus that forms an image using toner, and an image forming apparatus using the fixing device. Background technique [0002] Conventionally, an electrophotography-based image forming apparatus (for example, a printer) includes a fixing device that fuses a toner image formed on a recording sheet (recording paper or sheet) to fix the image to the sheet. As an example of the fixing device, a pair-roll type fixing device composed of a fixing roller and a pressing roller is known. [0003] The fixing roller is a roller member formed of a hollow metal core made of aluminum or the like and an elastic layer formed on the metal core and having a halogen lamp provided inside the core as a heat source. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/2053
Inventor 中山敦喜谷口明彦
Owner SHARP KK
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