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Development unit

A developing unit and developer technology, which is applied in the fields of electrography, optics, instruments, etc., can solve the problems of poor powder feeding, affecting the powder feeding effect of the powder feeding roller, and easily scratching the sponge material, and achieve the effect of preventing backflow.

Active Publication Date: 2014-09-03
PRINT RITE UNICORN IMAGE PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the existing developing unit, there is only a sealing film between the powder chamber and the developing chamber, and the user needs to manually pull out the sealing film before use; If there is no isolation barrier between them, the developer in the developing chamber is easy to flow back into the powder chamber, causing poor powder feeding
In addition, the blades of the stirring frame are also easy to scratch the sponge material on the surface of the powder feeding roller during the rotation process, which will affect the powder feeding effect of the powder feeding roller

Method used

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Embodiment Construction

[0022] figure 1 Shown is a developing cartridge 30 containing a developing unit 10 of the present invention. The developing cartridge 30 is composed of the developing unit 10 and a drum unit 20. The drum unit 20 includes a photosensitive drum 21, a charging roller 22 and a waste toner accommodating Powder bin 23 etc. The developing unit 10 includes an upper frame 18 and a lower cover 19, which are divided into a developing chamber 11 and a powder chamber 12 for storing developer; wherein, the powder chamber 12 is provided with a stirring frame 13, see Figure 5 , the stirring frame 13 has a stirring blade 131, and the stirring blade 131 has a plurality of inclined slits 132, thereby dividing a plurality of small blades 133 by a plurality of inclined slits 132, when the stirring blade 131 rotated with the stirring frame 13, the small blade 133 is in a spiral state, and the helical blade has a powder pushing function, which can promote the uniform distribution of the developer ...

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Abstract

The invention provides a development unit capable of preventing blades of a stirring rack from scratching the surface of a powder feeding roller and preventing a developer from flowing from a development bin back to a powder bin. The development unit is provided with the development bin and the powder bin storing the developer, wherein the stirring rack is arranged in the powder bin, and is provided with stirring blades; the powder feeding roller adjacent to the powder bin, and a development roller adjacent to the powder feeding roller are arranged in the development bin; and a separator is arranged between the powder bin and the development bin, and is provided with developer circulating holes. The separator is arranged, so that the blades of the stirring rack can be prevented from scratching a sponge material on the surface of the powder feeding roller adjacent to the powder bin in the rotating process; and moreover, a substantial part is arranged below the separator to effectively prevent the developer from flowing back, and the developer circulating holes above the substantial part can ensure that the developer can normally and smoothly flow from the powder bin to the development bin.

Description

technical field [0001] The present invention relates to a developing unit for an electrophotographic image forming apparatus. Background technique [0002] An electrophotographic imaging device, such as a laser printer, is a device that uses the principle of electrophotography to form an image on an image-forming medium (such as paper) through at least the processes of charging, exposing, developing, transferring, fixing, and cleaning. In an image forming device, a developing cartridge is usually used to realize the above-mentioned process. A developer cartridge is generally composed of a developer unit and a drum unit, or only includes a developer unit. [0003] In the charging process, the surface of the photosensitive element (such as a photosensitive drum) is uniformly charged with a predetermined charge by means of a charging device such as a corona discharge method or a charging roller; Selective exposure, due to the photosensitive characteristics of the photosensit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
Inventor 邱聪雨谭武刚周宏辉
Owner PRINT RITE UNICORN IMAGE PROD CO LTD