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Developer conveying device and development device, toner cartridge, and cleaning unit that are provided with developer conveying device

A technology of conveying device and developing device, which is applied in the fields of developer conveying device and developing device, can solve problems such as hindering the advancing screw, and achieve the effect of suppressing the decrease of fluidity and the decrease of printed image density

Active Publication Date: 2011-12-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the toner stagnated on the downstream wall surface of the toner conveying path becomes solidified to cause a locking phenomenon that hinders the rotation of the propulsion screw.

Method used

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  • Developer conveying device and development device, toner cartridge, and cleaning unit that are provided with developer conveying device
  • Developer conveying device and development device, toner cartridge, and cleaning unit that are provided with developer conveying device
  • Developer conveying device and development device, toner cartridge, and cleaning unit that are provided with developer conveying device

Examples

Experimental program
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Embodiment Construction

[0042] A developer conveying device according to an embodiment of the present invention includes a developer conveying cylinder and a screw-shaped shaft rotatably provided in the developer conveying cylinder, and conveys a developer for forming an electrophotographic image. For example, the developer conveying device is suitable for application to electrophotographic image forming apparatuses such as monochrome or full-color copiers, printers, facsimiles, and multifunctional peripherals having functions thereof, and is particularly suitable for using two sets of components including toner and carrier. The developer conveying mechanism of the imaging device that divides the developer.

[0043] Among two-component developers, the toner develops an electrostatic latent image on a photoconductor drum of an image forming apparatus. As used herein, "developer" includes not only a single toner used in a two-component developer but also a two-component developer in which a carrier is ...

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Abstract

The invention provides a developer conveying device and a development device, a toner cartridge, and a cleaning unit that are provided with the developer conveying device. The developer conveying device comprises a developer conveying cylinder and a screw-shaped shaft, wherein the screw-shaped shaft includes a rotating shaft that is journaled in an upstream wall portion and a downstream wall portion, which are included in the developer conveying cylinder, and a spiral blade that is mounted on an outer circumferential surface of the rotating shaft. The rotating shaft includes a conical portionthat thickens gradually toward the downstream side. And the spiral blade includes an agitating blade portion whose lead angle increases gradually toward the downstream side.

Description

technical field [0001] The present invention relates to a developer conveying device that conveys a developer containing at least toner, and a developing device, a toner cartridge, and a cleaning unit provided with the developer conveying device. Background technique [0002] Recently, two-component developers (hereinafter simply referred to as "developers") having excellent toner charging stability are widely used in electrophotographic image forming apparatuses satisfying full-color images and high-quality images. The developer includes toner and carrier. Properly charged toner is obtained by friction between the toner and the carrier when the developer is stirred in the developer tank of the developing device. In the developing device, charged toner is supplied to the surface of a developing roller, and the charged toner moves from the developing roller to an electrostatic latent image formed on a photoconductor drum by electrostatic attraction. Thus, a toner image is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G21/00G03G15/00
CPCG03G15/0822G03G2215/0838G03G2215/0822G03G2215/0833
Inventor 林重贵永井隆文
Owner SHARP KK
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