Developing Device And Image Forming Apparatus Incorporating Same

A developing device and a developer technology, which are applied in the fields of electric recording technology using charge patterns, equipment for electric recording technology using charge patterns, and electrography, can solve problems such as difficult scraper spacing and implementation, and achieve low cost. Effect

Active Publication Date: 2016-08-24
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it is difficult to sufficiently improve the positional accuracy of the mounting holes at low cost, it is difficult to set the blade pitch at low cost and with high precision in conventional developing devices.

Method used

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  • Developing Device And Image Forming Apparatus Incorporating Same
  • Developing Device And Image Forming Apparatus Incorporating Same
  • Developing Device And Image Forming Apparatus Incorporating Same

Examples

Experimental program
Comparison scheme
Effect test

Deformed example 1

[0089] Next, a modified example (hereinafter, this modified example is referred to as "modified example 1") of the configuration in which the round bar scraper 146 is assembled toward the developing cartridge body 144 in the above-mentioned embodiment will be described.

[0090] A rod-shaped developer regulating member such as the round bar blade 146 is generally easier to bend than a flat plate-shaped developer regulating member (blade) as described above. In the present embodiment described above, the vicinity of both ends of the round bar scraper 146 is held by the scraper holders 148 , respectively. Therefore, because of the pressure of the developer, the self-weight of the round bar scraper 146, and the mutual pulling magnetic force of the N2 pole (predetermined limit pole), the center of the long side direction of the round bar scraper 146 is easily displaced after a large displacement. bending. When such bending occurs, the distance DG between the blades near the cente...

Deformed example 2

[0100] Next, another modified example (hereinafter, this modified example is referred to as "modified example 2") of the configuration in which the round bar scraper 146 is assembled toward the developing cartridge body 144 in the above-mentioned embodiment will be described.

[0101]In the operation of installing two or more scraper holders 148 on the holder installation surface 144a respectively, it is necessary to hold the round bar scraper 146 to each scraper holder 148 so that all the scraper holders 148 are positioned in a mutually consistent posture. The round bar scraper 146 is held such that each scraper holding portion 148 holds a designated holding position in the longitudinal direction of the round bar scraper 146 . However, when each scraper holding part 148 is comprised by an independent member, this operation will become complicated.

[0102] Figure 12 (a) to (c) are exploded perspective views of the developing device in the second modification.

[0103] The ...

Deformed example 3

[0110] Next, another modified example of the developing device in the aforementioned embodiment (hereinafter, this modified example will be referred to as “modified example 3”) will be described.

[0111] As described above, a rod-shaped developer regulating member such as the round bar blade 146 is generally easier to bend than a flat plate-shaped developer regulating member (blade). Therefore, problems (instability in the amount of developer conveyed toward the developing area, uneven conveyance of the developer in the direction of the rotational axis of the developing sleeve, etc.) caused by the bending of the round bar blade 146 tend to occur. As a method of suppressing this problem, as described in Modification 1 or Modification 2 above, in addition to increasing the holding portion of the scraper holder 148, 248 for the round bar scraper 146, it is also conceivable to reduce the amount of the round bar scraper 146 so that The method of bending forces.

[0112] In Modifi...

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PUM

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Abstract

The invention relates to a developing device and image forming apparatus incorporating same. Even if a developing agent limiting component, such as a rod-shaped developer, which is difficult to form a fixed position for adjustment, distance between scaper blades can be set with low cost and high precision. The developing device comprises the following components: a developer bearer (141); a supporter (144) for supporting the developer bearer; a developer limiting component (146) which is disposed facing the surface of the developer bearer across a gap and extends long in a rotation axis direction of a developer sleeve; a holder (148), which is used for holding the developer limiting component; a fixing mechanism (148b) which is used for fixing the holder to a fixing position (144a) of the supporter, and the fixing mechanism is used for adjust the fixing position of the holder in a direction of width change direction of the gap relative to the fixing position.

Description

technical field [0001] The present invention relates to a developing device and an image forming device. Background technique [0002] Conventionally, there is a developer regulating member that is arranged facing the surface of the developer carrier with a certain gap, and is used to regulate the amount of the developer conveyed toward the developing area. Instead of a flat member like a scraper, it is a developing device that uses a round bar member. [0003] For example, the developing device disclosed in Patent Document 1 is configured to be rotatable by providing a prescribed gap (blade pitch) between a bar member serving as a developer restricting member and a developing sleeve (hollow member). In this developing device, a bar member is constituted by a magnetic member, so that the bar member and the magnetic poles (prescribed limit magnetic poles) inside the developing sleeve arranged adjacent to it cooperate to form a strong magnetic field, and increase the magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/09
CPCG03G15/0815G03G15/0921G03G2215/0648G03G15/0812G03G15/0893G03G15/09G03G2215/0132G03G2215/0838
Inventor 押川雄树浅见彰小川嘉子山田正明藤原香弘木村则幸岸嘉治清水保伸松本纯一福田善行石仓裕司斋藤启
Owner RICOH KK
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