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Image forming device having cleaner parts of charging roller

A technology for cleaning parts and images, which is applied in the direction of electromechanical devices, corona discharge devices, electric components, etc., can solve the problems of impracticality and impracticality, achieve large sliding resistance, prevent banded streak images, and improve cleaning effect Effect

Inactive Publication Date: 2004-08-11
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, although the often-connected cleaning member can make the image forming apparatus miniaturized, it is mostly not practical, and such a often-connected cleaning member is not yet suitable for practical use.

Method used

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  • Image forming device having cleaner parts of charging roller
  • Image forming device having cleaner parts of charging roller
  • Image forming device having cleaner parts of charging roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] The imaging unit of the image forming apparatus according to the present invention is such as Figure 4 As shown, a charging device 2 , an exposure device 3 , and a developing device 4 are provided around a drum-shaped photoreceptor (image carrier) 1 that can rotate in the direction of arrow A. The above-mentioned charging device 2 includes a charging roller 9, which is driven to rotate along with the rotation of the photoreceptor 1 while being in contact with the surface of the photoreceptor 1, and is applied with a voltage from a power source not shown in the figure, so that the surface of the photoreceptor 1 is uniformly charged. 3. An electrostatic latent image is formed by irradiating laser light L on the photoreceptor 1, and the developing device 4 develops the electrostatic latent image into a toner image.

[0022] In addition, a transfer ...

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PUM

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Abstract

To make a jitter image possible to be prevented from appearing, regardless of adopting a cleaning member of normally abutting type. This image forming device is allowed, to make the surface of an electrifying roller 9, to the specified surface roughness provided with directional property, to make the directional property of the surface roughness butting in the opposing direction with respect to the rotary direction (in arrow A direction) of a photoreceptor 1, and to make the contact in the following direction with respect to the contact direction with the roller cleaning member 22. As the result of the above, since the cleaning member 22 is held in slidable contact with the surface of the electrifying roller 9 in the forward direction, therefore the slidable contact is made smooth being free from any catch, and vibration is prevented from exerting on the photoreceptor 1 through electrifying roller 9 during the image formation, the jitter image is made possible to be prevented from appearing.

Description

technical field [0001] The present invention relates to an image forming apparatus in which a photoreceptor is charged by a charging roller connected to the photoreceptor for driven rotation, and a cleaning member for cleaning the surface of the charging roller is constantly pressed against the surface of the photoreceptor. Background technique [0002] Conventionally, in image forming apparatuses such as copiers and facsimile apparatuses, a photoreceptor, a developing device, and a charging device are generally housed in a housing as an imaging unit, thereby reducing the size of the entire apparatus. [0003] In the charging device provided in such an image forming unit, the charging member is often formed in the shape of a roller, and the charging roller and the photoreceptor are brought into pressure contact to uniformly charge the surface of the photoreceptor by applying a voltage. [0004] When the charging roller is driven to rotate while being in contact with the phot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/02G03G21/00
CPCH02K1/165H02K5/225H02K41/031H02K2213/03
Inventor 泽田彰佐藤真澄
Owner RICOH KK
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