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Charging device and image forming apparatus

A charging device and image technology, applied in the direction of electric recording process equipment using charge pattern, corona discharge device, electric recording process using charge pattern, etc., can solve the problem of deterioration, image quality, and image quality that cannot be fully solved Deterioration and other issues

Active Publication Date: 2011-11-09
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As such, the conventional charging device fails to reliably prevent dust from adhering to the tip of the electrode, and thus fails to adequately address deterioration in image quality due to uneven discharge.
[0006] An object of the present invention is to provide a charging device capable of reliably preventing dust from adhering to the tip of a discharge electrode and sufficiently solving image quality deterioration due to uneven discharge, and to provide an image forming apparatus including the charging device

Method used

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  • Charging device and image forming apparatus
  • Charging device and image forming apparatus
  • Charging device and image forming apparatus

Examples

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Embodiment Construction

[0018] An exemplary charging device and an image forming apparatus including the same according to an embodiment of the present invention are described below with reference to the drawings.

[0019] Such as figure 1 As shown, the image forming apparatus 1 includes four image forming units 101A to 101D, an intermediate transfer belt 105, a secondary transfer roller 108, a belt cleaning unit 110, a sheet conveying path 113, a tray 114, a fixing unit 115, a paper output Roller 116 and output tray 117.

[0020] The intermediate transfer belt 105 is an endless belt suspended between a support roller 106A and a support roller 106B, and rotates in the arrow R direction. Primary transfer rollers 35A to 35D are provided inside the intermediate transfer belt 105 between the backup roller 106A and the backup roller 106B. Image forming units 101A to 101D, a secondary transfer roller 108 , and a belt cleaning unit 110 are provided outside the intermediate transfer belt 105 , which are ar...

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PUM

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Abstract

The invention relates to a charging device and an image forming apparatus. In the charging device, a holding member holding a discharge electrode is provided in a shield case. The holding member includes a first guide and a second guide defining a slit therebetween. In the slit, the rear face of the discharge electrode other than a first long side is fixed to the internal side face of the first guide. The holding member holds the discharge electrode so that the entire surface of the discharge electrode and the rear face of the first long side are positioned in an air path extending from the air inlet to a gap and the first long side faces a grid electrode.

Description

technical field [0001] The present invention relates to a charging device provided with a non-contact discharge electrode for charging a photoreceptor for electrophotographic image formation, and to an image forming apparatus including the charging device. Background technique [0002] Conventionally, in some electrophotographic image forming apparatuses, a charging device including a shield case having an opening and a non-contact discharge electrode fastened therein charges a photoreceptor for image formation. The charging device generates corona discharge (hereinafter, this may be simply referred to as discharge) from the tip of the discharge electrode under a high voltage applied to the discharge electrode with respect to the photoreceptor, thereby charging the photoreceptor. [0003] In this charging device, the ion wind generated during discharge causes air to flow into the shield case through the opening and circulates the air in the shield case. At this time, if dus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02G03G15/00
CPCG03G15/0291G03G15/02G03G2215/028
Inventor 山本昌延
Owner SHARP KK
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