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Developing device and image forming apparatus

A developing device and developer technology, applied to the electric recording process using charge pattern, equipment for electric recording process using charge pattern, and electrography, etc., can solve the problem that the developer cannot be fully tribocharged and cannot form a good image, etc. question

Active Publication Date: 2014-02-26
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this developer conveying portion, there is a problem that the developer sandwiched by the side surfaces of the spiral blade and the fin is compressed, and the compressed developer cannot be tribocharged sufficiently.
If the charging of the developer is insufficient, the image forming apparatus cannot form a good image

Method used

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  • Developing device and image forming apparatus
  • Developing device and image forming apparatus
  • Developing device and image forming apparatus

Examples

Experimental program
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Embodiment Construction

[0034] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0035] First, the image forming apparatus 100 including the developing device 200 according to the first embodiment of the present invention will be described.figure 1 is a schematic diagram showing the configuration of the image forming apparatus 100 . The image forming apparatus 100 is a multifunctional peripheral having a copying function, a printing function, and a facsimile function, and forms a full-color or monochrome image on a recording medium based on transmitted image information.

[0036] The image forming apparatus 100 includes a toner image forming unit 20 , a transfer unit 30 , a fixing unit 40 , a recording medium supply unit 50 , a discharge unit 60 , and a control unit not shown. The toner image forming section 20 includes: photosensitive drums 21b, 21c, 21m, 21y, charging sections 22b, 22c, 22m, 22y, exposure unit 23, ...

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PUM

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Abstract

In a developing device including a developer tank and a developing roller, an internal space of the developer tank is divided by a partition wall into a first conveying path, a second conveying path, a communication path and a pumping path. In the pumping path, there is disposed a developer pumping section including a pumping spiral blade, a pumping rotation shaft member, and a pumping gear. A developer in the pumping path is pumped up by the developer pumping section, so that a part of the developer is moved to a side of the first conveying path while another part of the developer is moved to a side of the second conveying path.

Description

technical field [0001] The present invention relates to a developing device and an image forming device. Background technique [0002] Copiers, printers, facsimile machines, and the like are equipped with image forming devices that form images by electrophotography. An electrophotographic image forming device forms an electrostatic latent image on the surface of an image carrier (photoreceptor) through a charging device and an exposure device, and supplies a developer through a developing device to develop the electrostatic latent image, and transfers the photosensitive image to The developer image on the body is transferred to a recording medium such as recording paper, and the developer image is fixed to the recording paper by a fixing device to form an image. [0003] The developer supplied to the photoreceptor by the developing device is stored in a developing tank included in the developing device. The developer stored in the developing tank is conveyed to a developin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G15/00
CPCG03G15/0822G03G2215/0841G03G2215/0822
Inventor 见原幸一永井隆文
Owner SHARP KK