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Image forming apparatus having gear mechanism for rotating image bearing member

An imaging device and a technology for carrying images, which are applied to equipment for electrical recording technology applying charge patterns, electrical recording technology applying charge patterns, electrical recording techniques, etc., and can solve problems such as difficulty in identifying strips

Active Publication Date: 2009-07-01
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the teeth of the gears switch meshes with the other gear in shorter periods (that is, the periods of switching become shorter and the frequency becomes higher), which makes the bands less clearly identifiable

Method used

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  • Image forming apparatus having gear mechanism for rotating image bearing member
  • Image forming apparatus having gear mechanism for rotating image bearing member
  • Image forming apparatus having gear mechanism for rotating image bearing member

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] For various aspects of this invention, an imaging device can be described with reference to the accompanying drawings.

[0029] In the following description, the terms "front", "rear", "upper" and "lower" are used to define the respective parts when the image forming apparatus is placed in a usable orientation.

[0030] 1. The overall structure of the laser printer

[0031] figure 1 is an external view of the laser printer 1 according to the present invention. As shown by the arrows in the figure, the laser printer 1 is usually placed with the top facing up and the front end facing forward.

[0032] The laser printer has a casing 3 substantially in the shape of a box (cuboid). There is a paper discharge tray 5 on the top surface of the casing 3, and the recording medium is printed out from the casing 3 through the paper discharge tray. For example, paper or OHP sheet can be used as the recording medium.

[0033] The paper discharge tray 5 has an inclined surface 5 ...

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PUM

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Abstract

The drive unit of the image forming apparatus is arranged such that the meshing noise frequency is higher than the image quality assurance frequency, and the meshing noise frequency is lower than or equal to an upper limit frequency of a 1 / 3 octave band including the image quality assurance frequency. The value of the image quality frequency is defined as the transmission speed of the recording medium multiplied by the value 1.6, and the meshing noise frequency is defined as the predetermined number of teeth of the first gear multiplied by the rotational speed of the motor. When the unit of the transmission speed of the recording medium is mm / s, the value The unit of 1.6 is circle / mm, and the unit of motor speed is revolution / second.

Description

[0001] Cross-references to related applications [0002] This application claims priority from Japanese Patent Application No. 2005-148630 filed on May 20, 2005. The content of which is hereby incorporated by reference into this application. technical field [0003] The present application relates to an image forming apparatus, and more particularly, to an image forming apparatus of the electrophotographic type. technical background [0004] An image forming apparatus of an electrophotographic type such as a laser printer forms an image on a recording medium such as paper or an OHP sheet by rotating a photosensitive drum to transfer toner adhering to the peripheral surface of the photosensitive drum to a recording medium. [0005] Accordingly, in the process of transferring the toner to the recording medium, if the photosensitive drum does not rotate at a constant speed relative to the recording medium, undesired, such as periodic white or dark spots, will appear in the con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/00
CPCG03G15/757
Inventor 小川大介
Owner BROTHER KOGYO KK