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Charging device, imaging cartridge and image forming apparatus having charging device

A technology of electrification and electrostatic latent image, which is applied in corona discharge devices, equipment for electric recording technology using charge patterns, and electric recording technology for applying charge patterns, etc., to achieve the effect of improving charging efficiency

Active Publication Date: 2013-03-27
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the charging efficiency can be improved to a certain extent by using the above-mentioned conventional technology, the charging efficiency cannot be improved to a degree that can correspond to the further higher image quality, higher speed, and smaller size required by current devices.

Method used

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  • Charging device, imaging cartridge and image forming apparatus having charging device
  • Charging device, imaging cartridge and image forming apparatus having charging device
  • Charging device, imaging cartridge and image forming apparatus having charging device

Examples

Experimental program
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no. 1 approach ）

[0040] figure 1 It is a diagram explaining the image forming apparatus according to the first embodiment of the present invention.

[0041] The image forming apparatus A is called a tandem color image forming apparatus, and forms a color image using four sets of image forming sections.

[0042] Using the optical system of the scanning exposure device of the image reading device SC, the image of the original placed on the original table is scanned and exposed, and read into the linear image sensor, and the photoelectric conversion is carried out in the image processing part (not shown). The image information signal is subjected to analog processing, A / D conversion, shading correction, image compression processing, etc., and then input to the optical writing section of the image forming section.

[0043] The four sets of image forming sections are the image forming section 10Y that forms an image in yellow (Y), the image forming section 10M that forms an image in magenta (M), t...

no. 2 approach ）

[0083] Figure 7 It is a front view and a perspective view showing a supporting member and a leaf spring of a charger according to a second embodiment of the present invention, Figure 8 It is a sectional view showing a part of the charger according to the present embodiment.

[0084] This embodiment differs from the first embodiment in the following points. That is, in the first embodiment, the curvature of the portion on which the gate is supported is changed by rotating the supporting member constituted by the shaped member having a curvature. In this embodiment, however, an elastic body having a curvature is used as the supporting member, and the elastic body is elastically deformed by an external force to change the curvature of the portion where the grid is supported. In addition, in the first embodiment, the relative distance between the carrying member and the photosensitive drum is changed by sliding the carrying member on the slope. In this embodiment, however, th...

no. 3 approach ）

[0098] Figure 9 It is a perspective view showing the carrying member and the curvature guide surface of the charger according to the third embodiment of the present invention, Figure 10 It is a sectional view showing a part of the charger according to the present embodiment.

[0099] This embodiment differs from the first embodiment in the following points. That is, in the first embodiment, the curvature of the portion on which the gate is supported is changed by rotating the supporting member constituted by the shaped member having a curvature. On the other hand, in the present embodiment, the curvature of the portion on which the grid is supported is changed by deforming the supporting member by sliding the supporting member having a curvature against the gradually changing curvature guide surface. In addition, in the first embodiment, the relative distance between the carrying member and the photosensitive drum is changed by sliding the carrying member on the slope. On...

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Abstract

A charging device which includes a grid (201) that has a curvature surface placed to face an outer circumferential surface of a photoconductive drum; a carrying member (202) that carries the grid in a portion having a curvature to form the curvature surface of the grid; and position adjusting mechanisms (2001, 200b, 2002) that moves a position of the carrying member to adjust a position of the grid in a sub to scanning direction of the photoconductive drum, an imaging cartridge and an image forming apparatus having the same.

Description

technical field [0001] The present invention relates to a charger, an imaging cartridge having the charger, and an image forming apparatus. Background technique [0002] In recent years, image forming apparatuses have been miniaturized and further increased in speed and image quality in order to achieve cost reduction. [0003] In order to realize the miniaturization of the device, a charging method is adopted in which a grid having a curved surface is used as a charger, and the curved surface is arranged to face the outer peripheral surface of the photosensitive drum to charge the photosensitive drum to improve charging characteristics. In such a charging method using a grid having a curved surface, the distance between the outer peripheral surface of the photosensitive drum and the curved surface of the grid affects the charging efficiency. [0004] As a technique for improving charging efficiency, there is a technique in which a gap roller carrying a photosensitive drum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02G03G15/08G03G15/00
CPCG03G15/0291
Inventor 永濑久喜服部好弘
Owner KONICA MINOLTA BUSINESS TECH INC
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