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Developing device and image forming apparatus provided with same

A technology of developing agent and opposite surface, which is applied in the fields of electric recording technology using charge pattern, equipment for electric recording process using charge pattern, and electrography, and can solve the problem of uneven toner concentration, etc.

Inactive Publication Date: 2014-12-03
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, an object of the present invention is to provide a developing device capable of solving the problem of uneven toner density on a magnetic roller of the developing device and an image forming apparatus including the developing device.

Method used

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  • Developing device and image forming apparatus provided with same
  • Developing device and image forming apparatus provided with same
  • Developing device and image forming apparatus provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Embodiment 1: The following sheet member 90 is provided.

[0092] Thickness of sheet member 90: 100 μm

[0093] Material of the sheet member 90: PET

[0094] Free end length of sheet member 90 (protrusion amount from support member): 3.0 mm

[0095] Interval between the magnetic roller 82 and the front end of the sheet member: 1.5mm

Embodiment 2

[0096] Example 2: The following sheet member 90 is provided.

[0097] Thickness of sheet member 90: 1mm

[0098] Material of thin sheet member 90: aluminum plate

[0099] Free end length of sheet member 90 (protrusion amount from support member): 3.0 mm

[0100] Interval between the magnetic roller 82 and the front end of the sheet member: 1.5mm

Embodiment 3

[0101] Example 3: The following sheet member 90 is provided.

[0102] Thickness of sheet member 90: 100 μm

[0103] Material of sheet member 90: magnetic stainless steel (SUS403)

[0104] Free end length of sheet member 90 (protrusion amount from support member 841): 3.0 mm

[0105] Interval between the magnetic roller 82 and the front end of the sheet member: 1.5mm

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PUM

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Abstract

A developing device includes a case for housing a developer, a magnetic roller, an agitating member, a layer thickness restricting member, an auxiliary developer storing portion and a plate-like flexible member. The magnetic roller includes a rotary shaft and magnetically carries the developer on a circumferential surface. The agitating member includes a shaft center and a screw forming portion arranged around the shaft center and agitates and conveys the developer while rotating. The layer thickness restricting member restricts the layer thickness of the developer to a predetermined thickness. The auxiliary developer storing portion faces the circumferential surface of the magnetic roller at a side upstream of the layer thickness restricting member in a rotating direction of the magnetic roller. The plate-like flexible member extends toward the circumferential surface of the magnetic roller and forms a wall surface on an upstream side of the auxiliary developer storing portion.

Description

technical field [0001] The present invention relates to a developing device used in image forming devices such as printers, and in particular to a developing device using a two-component developer and an image forming device having the developing device, the two-component developing agent Contains carrier and toner. Background technique [0002] Conventionally, as a developing device used in an image forming apparatus such as a printer, the following developing device is known. The above-mentioned developing device is constituted by installing a screw feeder (stirring member), a magnetic roller, and a layer thickness regulating member in a developing housing. The screw feeder agitates the toner by rotating around its axis. The magnet roller is arranged in parallel to the screw feeder, and the toner fed from the screw feeder rotates around the axis and is supplied to the peripheral surface side of the photosensitive drum. The layer thickness restricting member extends towa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G15/09
CPCG03G15/0812G03G15/09
Inventor 松井谦之
Owner KYOCERA DOCUMENT SOLUTIONS INC