JP2004029608A - Electrophotographic device - Google Patents

Electrophotographic device Download PDF

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Publication number
JP2004029608A
JP2004029608A JP2002189013A JP2002189013A JP2004029608A JP 2004029608 A JP2004029608 A JP 2004029608A JP 2002189013 A JP2002189013 A JP 2002189013A JP 2002189013 A JP2002189013 A JP 2002189013A JP 2004029608 A JP2004029608 A JP 2004029608A
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JP
Japan
Prior art keywords
developing
developing device
conductive member
roller
electrophotographic apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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JP2002189013A
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Japanese (ja)
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JP4096167B2 (en
Inventor
Akinori Kaneko
金子　哲憲
Masahiko Saito
斉藤　雅彦
Takashi Tsunohashi
角橋　高史
Takeshi Koyama
小山　　剛
Kazutomi Onishi
大西　一臣
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Hitachi Appliances Inc
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Hitachi Home and Life Solutions Inc
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  • Dry Development In Electrophotography (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To surely supply a developing bias voltage to the developing roller of the developing unit of a full-color electrophotographic device. <P>SOLUTION: A developing unit retracting means composed of a conductive member comes into contact with a conductive member provided inside a developing unit side and the developing-unit side conductive member comes into contact with a projection-shaped end part or a shaft part of a developing roller as a developing-unit constituting component; and a developing unit retracting means on a main-body side comes into a main-body side conductive member, which comes into contact with a power supply part of a substrate. The developing roller end part and developing-unit side conductive member are present on the same side in a developing unit case. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、電子写真装置に係り、特にフルカラー電子写真装置の現像器の現像ローラへ現像バイアス電圧を供給する構造に関する。
【０００２】
【従来の技術】
従来技術の電子写真装置では、現像器の現像ローラへ現像バイアス電圧を供給する技術として、現像器が感光体へ押し付け／退避動作することや、現像ローラ自身がトナー供給のため回転するため、現像ローラの端部を凸形状にし、その端部を現像器からむき出しの構造とし、電子写真本体側に設けた電極と接触させていた。
【０００３】
【発明が解決しようとする課題】
前記従来技術のような給電構造では、接点部では現像ローラ端部が回転動作に加え直線動作もするため本体側電極との摩擦による現像ローラ端部の摩耗が激しく、端部表面が荒れてしまったり、摩耗粉の付着により電気的接触不良を生じ、出力画像上にスジ状の画像不良が発生する場合があった。また接点部にトナー等の異物が付着した場合にも画像不良が発生することもあった。
【０００４】
本発明の目的は、このような従来技術の欠点を解消し、電子写真装置の現像器への現像バイアス電圧を安定して供給することである。
【０００５】
【課題を解決するための手段】
本発明の電子写真装置は、導電部材で構成された現像器退避手段が、現像器側の内側に設けた導電部材と接触し、その現像器側導電部材が現像器構成部品である現像ローラの端部もしくは軸部と接触し、その本体側の現像器退避手段は本体側導電部材と接触し、その導電部材が基板の電源供給部に接続する。
【０００６】
本発明の電子写真装置は、現像器の現像ローラ端部が凸形状をしており、電子写真本体側に設けた導電部材で構成される電極と接触し、その本体側電極と基板の電源供給部に接続する構造を有し、現像ローラ端部と前記現像器側導電部材が現像器ケースの同一側に存在する。
【０００７】
本発明の電子写真装置は、上記の現像器側導電部材とリセットローラとを接触させ、現像ローラもしくは現像ローラ軸受とリセットローラのそれぞれ左右両側もしくはいずれか片側を導電部材で接続する。
【０００８】
本発明の電子写真装置は、上記の現像器側導電部材を、現像器の構造部品であるプラスチック製の現像器フタとプラスチック製の現像器ケースとで挟み込んで、固定する。
【０００９】
本発明の電子写真装置は、上記の現像器側導電部材と本体側導電部材とを金属のプレス加工一体構造とした。
【００１０】
本発明の電子写真装置は、上記の現像器側導電部材を現像器内部のリセットローラにはめ込んで固定し、現像ローラ端部もしくは現像ローラ軸部もしくは現像ローラ軸受部に接している。
【００１１】
本発明の電子写真装置は、上記の本体側導電部材と現像器側導電部材を金属製ばねと金属プレス品とで構成される現像器退避手段とで接続する。
【００１２】
【発明の実施の形態】
次に本発明の実施例を図面を用いて説明する。図２は、本発明の実施例の電子写真装置であるフルカラープリンタの概略構成図である。図２を用いてプリンタ本体１の概略構成と動作とを説明する。ベルト状の感光体５の下側に、帯電器６と走査露光ユニット４が配置している。走査露光ユニット４から出射するレーザービームは、帯電済みの感光体５の表面を走査露光し、静電潜像を形成する。
【００１３】
感光体５の図２に向かって右側には、感光体５が平坦になる領域にカートリッジタイプの現像器２ａ〜２ｄが個別に配置されている。現像器２ａにブラック
（Ｋ）、現像器２ｂにイエロー（Ｙ）、現像器２ｃにマゼンダ（Ｍ）、現像器
２ｄにシアン（Ｃ）のトナーが内蔵されている。これらの現像器２ａ〜２ｄはプリンタ本体１に設けられた現像器退避手段３ａ〜３ｄにより感光体５から離間しており、静電潜像の対応色に合わせて選択的に感光体５へ現像器を感光体５に押し付けられて、各静電潜像に対応する色のトナー像を感光体５に形成する。
【００１４】
トナー保持体であるベルトもしくはドラム形状の転写ベルト７は、感光体５とトナー像転写領域で接触しながら回転するように配置されていて、感光体５の表面に形成されたトナー像がこのトナー像転写領域で転写ベルト７上に転写される。本実施例のフルカラープリンタでは、転写ベルト７が感光体５と同じ約１５０ｍｍ／ｓの周速度で同期回転する。転写ベルト７の周囲には、転写ローラ１１とクリーニングブラシ１４とが配置され、転写ベルト７の表面に感光体５から各色のトナー像が重合するように順次に転写されてフルカラートナー像を形成する。
【００１５】
転写ベルト７の下側には、給紙カセット８に収納され記録媒体１０を供給する給紙ローラ９が配置されている。給紙ローラ９で送られてきた記録媒体１０は転写ローラ１１と中間転写体である転写ベルト７との間を通り、転写ローラ１１に加える電圧によってトナー像が記録媒体１０上に転写される。転写ベルト７上に残ったトナーはクリーニングブラシ１４で回収される。表面にトナー像を転写した記録媒体１０は、定着器１２に搬送されてトナー像が記録媒体１０上に定着され、その後記録媒体１０は、排紙ローラ１３により機外へ搬送される。
【００１６】
図３は電子写真装置に用いる現像器２ａ〜２ｄの概略構成図である。現像器
２ａ〜２ｄはいずれも電子写真装置本体に着脱が可能であって、現像器ケース
１６と現像器フタ１５と現像ローラ１７とリセットローラ１８とで構成される。
この現像器ケース１６と現像器フタ１５とは絶縁体であるプラスチック製である。現像ローラ１７は金属の現像ローラ軸受１９で支持されている。現像器内部のトナーは、現像器内部のパドル２１により現像ローラ１７周辺まで供給され、回転している現像ローラ表面上に均一に帯電し付着する。均一に帯電付着したトナーは、現像ローラ１７に現像バイアス電圧を印加し、現像ローラ１７と感光体５表面との電位差を発生させることによって、感光体５表面に現像される。現像ローラ端部２０は本体側導電部材２２と接触させるために凸形状をしている。
【００１７】
図１に前記現像器２ａ〜２ｄへ現像バイアス電圧を供給する手段の詳細を示す。現像ローラ端部２０には本体側導電部材２２が接触し、現像器ケース１６内に設けた現像器側導電部材２４には、現像器を感光体から退避させる手段であって、本体側に備えた金属ばね２３が接触し、金属ばね２３は本体側導電部材２２と接触している。本体側導電部材２２は基板の電源供給部２５へ接続する。
【００１８】
このように、本実施例のフルカラープリンタでは、基板の電源供給部２５−本体側導電部材２２−現像ローラ１７と、電源供給部２５−本体側導電部材２２−金属ばね２３−現像器側導電部材２４−現像ローラ１７との複数の経路で現像ローラ１７へ現像バイアス電圧を供給する。この構造により、現像バイアス電圧供給の信頼性が向上する。例えば、現像ローラ端部２０と本体側導電部材２２との間に異物が付着して接触不良となっても、もう一つの現像器側導電部材２４により電圧が供給され、画像不良が発生しない。また、本実施例では、現像バイアス電圧を現像器に供給する接点を何れも現像器の同じ側面に配置してあるので、給電部材の引き回しが少なく現像バイアス電圧供給の信頼性が上がる。
【００１９】
図４ａと図４ｂはリセットローラ１８を介した現像ローラ１７への現像バイアス電圧供給手段の詳細を示す。現像器側導電部材２４をリセットローラ１８に接触させ、リセットローラ１８と現像ローラ１７との間を導電部材２６で接続する。図４ａはリセットローラ１８の左右軸部と現像ローラ１７の左右軸部を導電部材２６にて接続する構造を示す。図４ｂはリセットローラ１８の左右の軸受２７と左右の現像ローラ軸受１９とを導電部材２６で接続する構造を示す。このように本実施例のフルカラープリンタでは、現像器側導電部材２４と現像ローラ１７の間の電気接触経路がリセットローラ１８を介して並列接続となり、より電気接触の信頼性が向上し、画像の品質が向上する。
【００２０】
図５ａと図５ｂとに本実施例の現像器側導電部材２４の固定手段を示す。現像器側導電部材２４は金属のプレス加工品であり、一体形状となっている。図５ａは現像器側導電部材２４を現像器ケース１６と現像器フタ１５とで挟み込んで固定する構造の説明図である。図５ｂは現像器側導電部材２４をリセットローラ
１８にはめ込んで固定する構造の説明図である。この構造により、現像器側導電部材２４を小型化することが可能となり、固定するための追加部品が必要ない。
【００２１】
図６ａと図６ｂとに本実施例の現像器側導電部材２４を現像ローラ１７に接触させる手段の構造を示す。図６ａは現像ローラ１７軸部に現像器側導電部材２４を接触させる構造である。図６ｂは現像ローラ軸受１９に現像器側導電部材２４を接触させる構造である。
【００２２】
【発明の効果】
本発明の電子写真装置では、現像器の現像ローラへの現像バイアス電圧供給ルートが複数あるので、安定した電圧供給が可能となり安定した画像を得ることができる。
【図面の簡単な説明】
【図１】実施例のフルカラープリンタで、現像器へ現像バイアス電圧を供給する手段の説明図。
【図２】実施例のフルカラープリンタの構造の説明図。
【図３】実施例のフルカラープリンタに用いる現像器の概略構成図。
【図４】実施例のフルカラープリンタで、現像器のリセットローラを介して現像ローラへの現像電圧を供給する手段の説明図。
【図５】実施例のフルカラープリンタで、現像器側導電部材の固定方法の説明図。
【図６】実施例のフルカラープリンタで、現像器内導電部材を現像ローラへ接触する手段の説明図。
【符号の説明】
１…プリンタ本体、２ａ，２ｂ，２ｃ，２ｄ…現像器、３ａ，３ｂ，３ｃ，
３ｄ…現像器退避手段、４…走査露光ユニット、５…感光体、６…帯電器、７…転写ベルト、８…カセット、９…給紙ローラ、１０…記録媒体、１１…転写ローラ、１２…定着器、１３…排紙ローラ、１４…クリーニングブラシ、１５…現像器フタ、１６…現像器ケース、１７…現像ローラ、１８…リセットローラ、１９…現像ローラ軸受、２０…現像ローラ端部、２１…パドル、２２…本体側導電部材、２３…金属ばね、２４…現像器側導電部材、２５…電源供給部、２６…導電部材、２７…軸受。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electrophotographic apparatus, and more particularly to a structure for supplying a developing bias voltage to a developing roller of a developing device of a full-color electrophotographic apparatus.
[0002]
[Prior art]
In the prior art electrophotographic apparatus, as a technique of supplying a developing bias voltage to a developing roller of a developing device, the developing device presses / retreats to a photoreceptor and the developing roller itself rotates to supply toner. The end of the roller was formed in a convex shape, and the end was exposed from the developing unit, and was brought into contact with an electrode provided on the electrophotographic main body side.
[0003]
[Problems to be solved by the invention]
In the power supply structure of the related art, at the contact point, the end of the developing roller also performs a linear operation in addition to the rotating operation, so that the end of the developing roller is greatly worn due to friction with the body side electrode, and the end surface is roughened. In some cases, electric contact failure occurs due to adhesion of abrasion powder, resulting in streak-like image failure on an output image. In addition, when foreign matter such as toner adheres to the contact portion, an image defect sometimes occurs.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to eliminate such disadvantages of the prior art and to stably supply a developing bias voltage to a developing device of an electrophotographic apparatus.
[0005]
[Means for Solving the Problems]
In the electrophotographic apparatus of the present invention, the developing device retreating means formed of a conductive member contacts a conductive member provided inside the developing device side, and the developing device side conductive member is a developing roller component that is a developing device component. The developing device retreating means on the main body side contacts the end portion or the shaft portion, and contacts the main body side conductive member, and the conductive member is connected to the power supply unit of the substrate.
[0006]
According to the electrophotographic apparatus of the present invention, the end of the developing roller of the developing device has a convex shape, and comes into contact with an electrode formed of a conductive member provided on the main body of the electrophotographic apparatus. A developing roller end portion and the developing device side conductive member are on the same side of the developing device case.
[0007]
In the electrophotographic apparatus of the present invention, the above-mentioned conductive member on the developing device side is brought into contact with the reset roller, and the developing roller or the developing roller bearing and the reset roller are connected to both left and right sides or one side thereof by a conductive member.
[0008]
In the electrophotographic apparatus of the present invention, the above-mentioned conductive member on the developing device side is fixed by being sandwiched between a plastic developing device cover and a plastic developing device case which are structural components of the developing device.
[0009]
In the electrophotographic apparatus of the present invention, the above-mentioned conductive member on the developing device side and the conductive member on the main body side are formed into a metal press working integrated structure.
[0010]
In the electrophotographic apparatus of the present invention, the above-mentioned conductive member on the developing device side is fitted and fixed to a reset roller inside the developing device, and is in contact with an end portion of the developing roller, a developing roller shaft portion or a developing roller bearing portion.
[0011]
In the electrophotographic apparatus according to the present invention, the above-mentioned conductive member on the main body side and the conductive member on the developing device side are connected by a developing device retreating means composed of a metal spring and a metal pressed product.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a schematic configuration diagram of a full-color printer which is an electrophotographic apparatus according to the embodiment of the present invention. The schematic configuration and operation of the printer main body 1 will be described with reference to FIG. A charger 6 and a scanning exposure unit 4 are arranged below the belt-shaped photoconductor 5. The laser beam emitted from the scanning exposure unit 4 scans and exposes the surface of the charged photoconductor 5 to form an electrostatic latent image.
[0013]
On the right side of the photoconductor 5 as viewed in FIG. 2, cartridge type developing units 2a to 2d are individually arranged in a region where the photoconductor 5 is flat. The developing device 2a contains black (K) toner, the developing device 2b contains yellow (Y), the developing device 2c contains magenta (M), and the developing device 2d contains cyan (C) toner. These developing devices 2a to 2d are separated from the photosensitive member 5 by developing device retreating means 3a to 3d provided in the printer main body 1, and selectively developed on the photosensitive member 5 in accordance with the corresponding color of the electrostatic latent image. The image forming apparatus is pressed against the photoconductor 5 to form a toner image of a color corresponding to each electrostatic latent image on the photoconductor 5.
[0014]
A belt or a drum-shaped transfer belt 7 serving as a toner holding member is arranged so as to rotate while being in contact with the photoconductor 5 in a toner image transfer area, and the toner image formed on the surface of the photoconductor 5 The image is transferred onto the transfer belt 7 in the image transfer area. In the full-color printer of this embodiment, the transfer belt 7 rotates synchronously with the photosensitive member 5 at the same peripheral speed of about 150 mm / s. A transfer roller 11 and a cleaning brush 14 are arranged around the transfer belt 7, and toner images of each color are sequentially transferred from the photoconductor 5 to the surface of the transfer belt 7 so as to be superimposed to form a full-color toner image. .
[0015]
Below the transfer belt 7, a paper feed roller 9 stored in a paper feed cassette 8 and supplying a recording medium 10 is arranged. The recording medium 10 sent by the paper feed roller 9 passes between the transfer roller 11 and the transfer belt 7 as an intermediate transfer body, and a toner image is transferred onto the recording medium 10 by a voltage applied to the transfer roller 11. The toner remaining on the transfer belt 7 is collected by the cleaning brush 14. The recording medium 10 on which the toner image has been transferred to the surface is conveyed to a fixing device 12 where the toner image is fixed on the recording medium 10, and then the recording medium 10 is conveyed out of the apparatus by a paper discharge roller 13.
[0016]
FIG. 3 is a schematic configuration diagram of the developing devices 2a to 2d used in the electrophotographic apparatus. Each of the developing units 2a to 2d is detachable from the main body of the electrophotographic apparatus, and includes a developing unit case 16, a developing unit lid 15, a developing roller 17, and a reset roller 18.
The developing device case 16 and the developing device cover 15 are made of plastic, which is an insulator. The developing roller 17 is supported by a metal developing roller bearing 19. The toner inside the developing device is supplied to the periphery of the developing roller 17 by the paddle 21 inside the developing device, and is uniformly charged and adhered on the surface of the rotating developing roller. The uniformly charged toner is developed on the surface of the photoconductor 5 by applying a developing bias voltage to the developing roller 17 to generate a potential difference between the developing roller 17 and the surface of the photoconductor 5. The developing roller end 20 has a convex shape so as to make contact with the main body side conductive member 22.
[0017]
FIG. 1 shows details of a means for supplying a developing bias voltage to the developing devices 2a to 2d. The main body side conductive member 22 is in contact with the developing roller end 20, and the developing unit side conductive member 24 provided in the developing unit case 16 is a means for retracting the developing device from the photoconductor, and is provided on the main body side. The metal spring 23 is in contact, and the metal spring 23 is in contact with the main body side conductive member 22. The main body side conductive member 22 is connected to a power supply unit 25 of the substrate.
[0018]
As described above, in the full-color printer of the present embodiment, the power supply unit 25 of the substrate, the main body side conductive member 22 and the developing roller 17, and the power supply unit 25, the main body side conductive member 22 and the metal spring 23 are provided. A developing bias voltage is supplied to the developing roller 17 through a plurality of paths to the developing roller 17. With this structure, the reliability of the supply of the developing bias voltage is improved. For example, even if foreign matter adheres between the developing roller end portion 20 and the main body side conductive member 22 to cause a contact failure, a voltage is supplied by another developing device side conductive member 24, and no image defect occurs. Further, in this embodiment, since all the contacts for supplying the developing bias voltage to the developing device are arranged on the same side surface of the developing device, the feeding of the power supply member is reduced and the reliability of the developing bias voltage supply is improved.
[0019]
FIGS. 4A and 4B show details of the means for supplying a developing bias voltage to the developing roller 17 via the reset roller 18. FIG. The developing device-side conductive member 24 is brought into contact with the reset roller 18, and the reset roller 18 and the developing roller 17 are connected by a conductive member 26. FIG. 4A shows a structure in which the left and right shafts of the reset roller 18 and the left and right shafts of the developing roller 17 are connected by a conductive member 26. FIG. 4B shows a structure in which the left and right bearings 27 of the reset roller 18 and the left and right developing roller bearings 19 are connected by a conductive member 26. As described above, in the full-color printer according to the present embodiment, the electrical contact paths between the developing-unit-side conductive member 24 and the developing roller 17 are connected in parallel via the reset roller 18, so that the reliability of the electrical contact is further improved, and Quality is improved.
[0020]
FIGS. 5A and 5B show a fixing means of the developing unit-side conductive member 24 of the present embodiment. The developing device-side conductive member 24 is a pressed product made of metal and has an integral shape. FIG. 5A is an explanatory diagram of a structure in which the developing device-side conductive member 24 is sandwiched and fixed between the developing device case 16 and the developing device cover 15. FIG. 5B is an explanatory view of a structure in which the developing-unit-side conductive member 24 is fitted and fixed to the reset roller 18. With this structure, the developing-unit-side conductive member 24 can be reduced in size, and no additional component for fixing is required.
[0021]
FIGS. 6A and 6B show the structure of the means for bringing the developing unit-side conductive member 24 of this embodiment into contact with the developing roller 17. FIG. 6A shows a structure in which the developing unit-side conductive member 24 is brought into contact with the shaft of the developing roller 17. FIG. 6B shows a structure in which the developing device-side conductive member 24 is brought into contact with the developing roller bearing 19.
[0022]
【The invention's effect】
In the electrophotographic apparatus of the present invention, since there are a plurality of developing bias voltage supply routes to the developing roller of the developing device, a stable voltage can be supplied and a stable image can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of means for supplying a developing bias voltage to a developing device in a full-color printer according to an embodiment.
FIG. 2 is an explanatory diagram of the structure of a full-color printer according to the embodiment.
FIG. 3 is a schematic configuration diagram of a developing device used in the full-color printer of the embodiment.
FIG. 4 is an explanatory diagram of means for supplying a developing voltage to a developing roller via a reset roller of a developing device in the full-color printer of the embodiment.
FIG. 5 is an explanatory diagram of a fixing method of a developing-unit-side conductive member in the full-color printer according to the embodiment.
FIG. 6 is an explanatory view of means for contacting a conductive member in a developing device with a developing roller in the full-color printer of the embodiment.
[Explanation of symbols]
1 printer main body, 2a, 2b, 2c, 2d developing device, 3a, 3b, 3c,
3d: Developing device retracting means, 4: Scanning exposure unit, 5: Photoconductor, 6: Charger, 7: Transfer belt, 8: Cassette, 9: Feed roller, 10: Recording medium, 11: Transfer roller, 12 ... Fixing device, 13: discharge roller, 14: cleaning brush, 15: developing device lid, 16: developing device case, 17: developing roller, 18: reset roller, 19: developing roller bearing, 20: developing roller end, 21 ... Paddle, 22 ... Main body side conductive member, 23 ... Metal spring, 24 ... Developer side conductive member, 25 ... Power supply part, 26 ... Conductive member, 27 ... Bearing.

Claims (7)

露光手段と、感光体と、現像手段である現像器と、前記現像器を前記感光体から退避させる現像器退避手段とを備えた電子写真装置において、
前記現像器退避手段が電子写真装置本体側に配置してあって、
電子写真装置本体側と、現像器退避手段と接触する前記現像器部とに、それぞれ導電性部材を設け、
前記現像器側導電部材が、前記現像器の現像ローラ軸部と、前記現像器退避手段とに接触し、
前記本体側導電部材が、前記現像器退避手段と前記現像器の現像ローラ軸部とに接触し、
かつ本体側導電部材が現像バイアス電圧供給部に接続していることを特徴とする電子写真装置。An electrophotographic apparatus including an exposure unit, a photoconductor, a developing device as a developing unit, and a developing device retreating unit for retreating the developing device from the photoconductor,
The developing device retracting means is arranged on the electrophotographic apparatus main body side,
An electroconductive member is provided on each of the electrophotographic apparatus main body side and the developing unit which comes into contact with the developing unit retracting means,
The developing device-side conductive member is in contact with the developing roller shaft of the developing device and the developing device retracting means;
The body-side conductive member is in contact with the developing device retracting means and a developing roller shaft of the developing device,
An electrophotographic apparatus, wherein the body-side conductive member is connected to a developing bias voltage supply unit. 請求項１に記載の電子写真装置において、
前記現像器の現像ローラ軸端部が凸形状をしており、本体フレームに取り付けた本体側導電部材と接触し、
前記現像器退避手段とその手段と接触する前記現像器部に、それぞれ導電性部材を設け、現像器側導電部材が前記現像ローラ軸部と接触し、本体側導電部材を基板の電源供給部に接続し、
前記現像ローラ端部と前記現像器側導電部材を前記現像器ケースの同一側に配置することを特徴とする電子写真装置。The electrophotographic apparatus according to claim 1,
The developing roller shaft end of the developing device has a convex shape, and comes into contact with the main body side conductive member attached to the main body frame,
A conductive member is provided in each of the developing device retreating means and the developing device portion that comes into contact with the developing device retreating means, the developing device side conductive member contacts the developing roller shaft portion, and the main body side conductive member is connected to a power supply portion of the substrate. connection,
An electrophotographic apparatus, wherein the end portion of the developing roller and the conductive member on the developing device side are arranged on the same side of the developing device case. 請求項１または請求項２のいずれかに記載の電子写真装置において、
前記現像器内部に金属の現像ローラ軸受とリセットローラおよび金属のリセットローラ軸受を有し、前記現像器側導電部材をリセットローラに接触させ、前記現像ローラもしくは現像ローラ軸受部と前記リセットローラもしくは前記リセットローラ軸受部をそれぞれ左右両側もしくは片側どうしで導電性部材にて接続することを特徴とする電子写真装置。The electrophotographic apparatus according to claim 1 or 2,
The developing device has a metal developing roller bearing and a reset roller and a metal reset roller bearing, and the developing device side conductive member is brought into contact with a reset roller, and the developing roller or the developing roller bearing portion and the reset roller or the An electrophotographic apparatus, wherein reset roller bearings are connected by conductive members on both left and right sides or one side. 請求項１または請求項２のいずれかに記載の電子写真装置において、
前記現像器側導電部材を前記現像器の現像器フタと現像器ケースとで挟持することによって固定することを特徴とする電子写真装置。The electrophotographic apparatus according to claim 1 or 2,
An electrophotographic apparatus, wherein the electroconductive member on the developing device side is fixed by being sandwiched between a developing device cover and a developing device case of the developing device. 請求項１〜請求項４のいずれかに記載の電子写真装置において、
前記現像器側導電部材または、本体側導電部材は金属のプレス一体構造であることを特徴とする電子写真装置。The electrophotographic apparatus according to any one of claims 1 to 4,
An electrophotographic apparatus, wherein the conductive member on the developing device side or the conductive member on the main body side has a metal press integrated structure. 請求項１〜請求項５のいずれかに記載の電子写真装置において、
前記現像器側導電部材は前記リセットローラにはめ込み固定し、前記現像ローラ端部もしくは前記現像ローラ軸部もしくは前記現像ローラ軸受部に接することを特徴とする電子写真装置。The electrophotographic apparatus according to any one of claims 1 to 5,
The electrophotographic apparatus, wherein the conductive member on the developing device side is fixed to the reset roller and is in contact with the end of the developing roller, the shaft of the developing roller, or the bearing of the developing roller. 請求項１〜請求項６のいずれかに記載の電子写真装置において、
前記現像ローラもしくは前記現像ローラ軸受部に接する現像器側導電部材を、金属製のばねと金属プレス品とで構成される前記現像器退避手段とで接続することを特徴とする電子写真装置。The electrophotographic apparatus according to any one of claims 1 to 6,
An electrophotographic apparatus, wherein the developing roller or a developing-device-side conductive member that is in contact with the developing-roller bearing is connected to the developing-device retracting means including a metal spring and a metal pressed product.
JP2002189013A 2002-06-28 2002-06-28 Electrophotographic equipment Expired - Fee Related JP4096167B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007058057A (en) * 2005-08-26 2007-03-08 Brother Ind Ltd Developing cartridge, process cartridge and image forming apparatus
JP2017078743A (en) * 2015-10-19 2017-04-27 株式会社リコー Developing device, process cartridge, and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007058057A (en) * 2005-08-26 2007-03-08 Brother Ind Ltd Developing cartridge, process cartridge and image forming apparatus
JP2017078743A (en) * 2015-10-19 2017-04-27 株式会社リコー Developing device, process cartridge, and image forming apparatus

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