JP2002311714A

JP2002311714A - Method for reproducing developing device and process cartridge

Info

Publication number: JP2002311714A
Application number: JP2001112108A
Authority: JP
Inventors: Takashi Akutsu; 隆阿久津; Yoshiyuki Matori; 至之馬鳥; Shinya Noda; 晋弥野田; Ichiro Terada; 一郎寺田; Etsuichi Sasako; 悦一笹子; Teruhiko Sasaki; 輝彦佐々木
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2001-04-11
Filing date: 2001-04-11
Publication date: 2002-10-25

Abstract

PROBLEM TO BE SOLVED: To provide a method for reproducing developing device and process cartridge capable of reproducing a developing device and a process cartridge by exchanging parts, which can not be used again as they are because of wearing caused by sliding, with unused articles. SOLUTION: When reproducing a developing device 10 having a frame, a developing roller 10d for developing an electrostatic latent image, a magnet 10c located inside the developing roller 10d, a first conductive part provided along the lengthwise direction of the frame, a second conductive part fixedly provided inside the developing roller 10d and a third conductive part provided on the frame, the magnet 10c is taken out of the developing roller 10d, a conductive component, which comprises the first conductive part and slides in contact with the second conductive part, attached to the magnet 10c is detached and after the exchange component of this conductive component is attached to the magnet 10c, the magnet 10c is located inside the developing roller 10d in a state similar to before taking out so that the conductive component can be exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電子写真画像形成
装置に用いられる現像装置及びプロセスカートリッジの
再生産方法にに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device used in an electrophotographic image forming apparatus and a method for reproducing a process cartridge.

【０００２】ここで、電子写真画像形成装置とは、電子
写真画像形成方式を用いて記録媒体に画像を形成するも
のである。そして、電子写真画像形成装置には、例え
ば、電子写真複写機、電子写真プリンタ（例えば、レー
ザービームブリンタ、ＬＥＤプリンタ等）、ファクシミ
リ装置、ワードプロセッサ等が含まれる。Here, the electrophotographic image forming apparatus forms an image on a recording medium using an electrophotographic image forming method. The electrophotographic image forming apparatus includes, for example, an electrophotographic copying machine, an electrophotographic printer (for example, a laser beam printer, an LED printer, and the like), a facsimile machine, a word processor, and the like.

【０００３】又、プロセスカートリッジとは、帯電手
段、現像手段又はクリーニング手段と電子写真感光ドラ
ムとを一体的にカートリッジ化し、このカートリッジを
電子写真画像形成装置本体に対して着脱可能とするもの
である。A process cartridge is a cartridge in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive drum are integrally formed as a cartridge, and this cartridge is detachably mountable to an electrophotographic image forming apparatus main body. .

【０００４】[0004]

【従来の技術】従来、電子写真画像形成プロセスを用い
た電子写真画像形成装置においては、電子写真感光ドラ
ム及びこれに作用するプロセス手段を一体的にカートリ
ッジ化し、このカートリッジを電子写真画像形成装置本
体に着脱可能とするプロセスカートリッジ方式が採用さ
れている。このプロセスカートリッジ方式によれば、電
子写真画像形成装置のメンテナンスをサービスマンによ
らないでユーザー自身で行うことができるため、操作性
を格段に向上させることができる。このため、このプロ
セスカートリッジ方式は、画像形成装置において広く用
いられている。2. Description of the Related Art Conventionally, in an electrophotographic image forming apparatus using an electrophotographic image forming process, an electrophotographic photosensitive drum and process means acting on the electrophotographic photosensitive drum are integrally formed into a cartridge, and this cartridge is used as a main body of the electrophotographic image forming apparatus. A process cartridge system which can be attached to and detached from is used. According to this process cartridge system, maintenance of the electrophotographic image forming apparatus can be performed by a user himself without relying on a service person, so that operability can be significantly improved. For this reason, this process cartridge system is widely used in image forming apparatuses.

【０００５】このようなプロセスカートリッジは、電子
写真感光体に形成された静電潜像を現像するための現像
装置としての現像手段を有し、電子写真感光体に形成さ
れた静電潜像をトナー（現像剤）を用いて現像ローラに
より現像している。即ち、現像ローラに現像バイアスを
印加して該現像ローラ上のトナーを静電潜像に応じて電
子写真感光体に移転させることによってトナー像（現像
剤像）を形成して可視像化している。Such a process cartridge has a developing device as a developing device for developing an electrostatic latent image formed on the electrophotographic photosensitive member, and develops the electrostatic latent image formed on the electrophotographic photosensitive member. Development is performed by a developing roller using toner (developer). That is, by applying a developing bias to the developing roller and transferring the toner on the developing roller to the electrophotographic photosensitive member according to the electrostatic latent image, a toner image (developer image) is formed and visualized. I have.

【０００６】現像ローラに現像バイアスを印加する方法
としては、図１〜図６に示すように、現像ローラ１０ｄ
内部に爪部３０ｂと摺動腕３０ｃを有する第２の導電部
である摺動接点３０を現像ローラ１０ｄの内周面に前記
爪部３０ｂが導通可能に接触するように取り付け、前記
現像ローラ１０ｄ内部に配置されたマグネットローラ１
０ｃに第１の導電部の構成部品である円筒電極２８と固
定接点２９を互いに電気的に導通可能に取り付け、前記
摺動接点３０の摺動腕３０ｃと前記固定接点２９を弾性
的に摺動するように接触させ、又、現像装置１０のハウ
ジングに取り付けられた固定電極部材の接点部２５ｂに
前記円筒電極２８を接触させる。As a method of applying a developing bias to the developing roller, as shown in FIGS.
A sliding contact 30, which is a second conductive portion having a claw portion 30b and a sliding arm 30c therein, is attached to the inner peripheral surface of the developing roller 10d such that the claw portion 30b is in conductive contact with the developing roller 10d. Magnet roller 1 arranged inside
0c, the cylindrical electrode 28 and the fixed contact 29, which are the components of the first conductive portion, are attached so as to be electrically conductive with each other, and the sliding arm 30c of the sliding contact 30 and the fixed contact 29 are elastically slid. The cylindrical electrode 28 is brought into contact with the contact portion 25b of the fixed electrode member attached to the housing of the developing device 10.

【０００７】そして、プロセスカートリッジＢを装置本
体に装着した際に装置本体に設けられた接点２６に固定
電極部材２５を電気的に導通させて接触させることによ
り、装置本体の電源２７と現像ローラ１０ｄは、装置
側接点２６と固定電極部材２５の露出部２５ａ、固定
電極部材２５の接点部２５ｂと円筒電極２８の左側の突
起部２８ｂ、円筒電極２８の右側の突起部２８ａと固
定接点２９の爪部２９ｂ、固定接点２９の円板部２９
ａと摺動接点３０の摺動腕３０ｃ、摺動接点３０の爪
部３０ｂから現像ローラ１０ｄの内周面１０ｄ１という
経路を経て電気的に接続し、現像バイアスを印加すると
いう方法が提案されている。When the process cartridge B is mounted on the main assembly of the apparatus, the fixed electrode member 25 is brought into electrical contact with a contact 26 provided on the main assembly of the apparatus, thereby connecting the power supply 27 of the main assembly of the apparatus with the developing roller 10d. Are the device side contact 26 and the exposed portion 25a of the fixed electrode member 25, the contact portion 25b of the fixed electrode member 25 and the left protrusion 28b of the cylindrical electrode 28, the right protrusion 28a of the cylindrical electrode 28 and the claw of the fixed contact 29. Part 29b, disk part 29 of fixed contact 29
and a method of applying a developing bias by electrically connecting a with a sliding arm 30c of the sliding contact 30 and a claw 30b of the sliding contact 30 via a path of an inner peripheral surface 10d1 of the developing roller 10d. I have.

【０００８】[0008]

【発明が解決しようとする課題】本発明は従来技術を更
に発展させたものであり、その目的とする処は、摺動に
よる摩耗のためにそのまま再使用することができない部
品を未使用品に交換することによって現像装置及びプロ
セスカートリッジの再生産を可能とする現像装置及びプ
ロセスカートリッジの再生産方法を提供することにあ
る。SUMMARY OF THE INVENTION The present invention is a further development of the prior art, and aims at converting parts that cannot be reused as they are due to wear due to sliding into unused parts. It is an object of the present invention to provide a method of reproducing a developing device and a process cartridge, which enables reproduction of a developing device and a process cartridge by replacing the developing device.

【０００９】[0009]

【課題を解決するための手段】上記目的を達成するた
め、本発明は、フレームと、現像剤を用いて前記電子写
真感光体に形成された静電潜像を現像するための現像ロ
−ラと、前記現像ローラの内部に配置されたマグネット
と、前記フレームの長手方向に沿って設けられた第１導
電部と、前記現像ローラの内部に固定的に設けられた第
２導電部と、前記フレームに設けられた第３導電部を有
する現像装置の再生産時に、前記マグネットを前記現像
ローラの内部から取り出し、前記マグネットに取り付け
られた前記第１導電部を構成し且つ前記第２導電部と摺
動接触している導電部品を取り外し、該導電部品の交換
部品を前記マグネットに取り付けた後、前記マグネット
を前記現像ローラの内部に、取り出す前と同様に、配置
することによって前記導電部品を交換することを特徴と
する。To achieve the above object, the present invention provides a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive member using a frame and a developer. A magnet disposed inside the developing roller, a first conductive portion provided along a longitudinal direction of the frame, a second conductive portion fixedly provided inside the developing roller, At the time of re-production of the developing device having the third conductive portion provided on the frame, the magnet is taken out from the inside of the developing roller, constitutes the first conductive portion attached to the magnet, and forms the second conductive portion. After removing the conductive part that is in sliding contact and attaching a replacement part for the conductive part to the magnet, the magnet is placed inside the developing roller in the same manner as before the removal, so that Characterized in that it replace the conductive part.

【００１０】又、本発明は、電子写真画像形成装置本体
に着脱可能なプロセスカートリッジであって、フレーム
と、現像剤を用いて電子写真感光体に形成された静電潜
像を現像するための現像ローラと、該現像ローラの内部
に配置されたマグネットと、前記フレームの長手方向に
沿って設けられた第１の導電部と、前記現像ローラの内
部に固定的に設けられた第２の導電部と、前記フレーム
に設けられた第３の導電部を有する現像装置を備えるプ
ロセスカートリッジの再生産時に、前記マグネットを前
記現像ローラの内部から取り出し、前記マグネットに取
り付けられた前記第１の導電部を構成し且つ前記第２の
導電部と摺動接触している導電部品を取り外し、該導電
部品の交換部品を前記マグネットに取り付けた後、前記
マグネットを前記現像ローラの内部に、取り出す前と同
様に、配置することによって前記導電部品を交換するこ
とを特徴とする。The present invention also provides a process cartridge detachably mountable to an electrophotographic image forming apparatus main body, for developing an electrostatic latent image formed on an electrophotographic photosensitive member using a frame and a developer. A developing roller, a magnet disposed inside the developing roller, a first conductive portion provided along a longitudinal direction of the frame, and a second conductive portion fixedly provided inside the developing roller. When the process cartridge including a developing unit having a portion and a third conductive portion provided on the frame is reproduced, the magnet is taken out from the inside of the developing roller, and the first conductive portion attached to the magnet is reproduced. And removing a conductive part that is in sliding contact with the second conductive part, and attaching a replacement part for the conductive part to the magnet, Inside the image roller, as before retrieving, characterized by replacing the conductive component by placing.

【００１１】[0011]

【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.

【００１２】図１〜図１２に本実施の形態に係る現像装
置とプロセスカートリッジの再生産方法を示す。1 to 12 show a developing device and a method for remanufacturing a process cartridge according to the present embodiment.

【００１３】ここでは、説明の順序として、先ず図７〜
図９を参照してプロセスカートリッジ及びこれを用いる
電子写真画像形成装置の全体構成を説明し、次に図１〜
図６を参照して接点構成について説明し、最後に図１０
〜図１２を参照して現像装置及びプロセスカートリッジ
の再生産方法について説明する。Here, the order of the description will be described first with reference to FIGS.
The overall configuration of the process cartridge and the electrophotographic image forming apparatus using the same will be described with reference to FIG.
The contact configuration will be described with reference to FIG.
Referring to FIG. 12 to FIG. 12, a method of reproducing the developing device and the process cartridge will be described.

【００１４】［全体構成］電子写真画像形成装置（レー
ザービームブリンタ）Ａは、図７に示すように、光学系
１から画像情報に基づいた情報光をドラム形状の電子写
真感光体（以下、「感光ドラム」と称する）７へ照射し
て該感光ドラム７に静電潜像を形成し、この潜像をトナ
ー（現像剤）を用いて現像してトナー像を形成する。そ
して、前記トナー像の形成と同期して、記録紙、ＯＨＰ
シート等の記録媒体２をカセット３ａからピックアップ
ローラ３ｂ及びこれに圧接された圧接部材３ｃで１枚ず
つ分離給送するとともに、搬送ローラ対３ｄ、レジスト
ローラ対３ｅ等から成る搬送手段３で搬送し、且つ、プ
ロセスカートリッジＢとしてカートリッジ化された前記
感光ドラム７に形成したトナー像を転写手段としての転
写ローラ４に電圧印加することによって記録媒体２に転
写し、その記録媒体２を搬送ベルト３ｆによって定着手
段５へと搬送する。[Overall Configuration] As shown in FIG. 7, an electrophotographic image forming apparatus (laser beam printer) A transmits an information beam based on image information from an optical system 1 to a drum-shaped electrophotographic photosensitive member (hereinafter, referred to as a "photoreceptor"). Irradiates the photosensitive drum 7 to form an electrostatic latent image on the photosensitive drum 7, and develops the latent image using toner (developer) to form a toner image. Then, in synchronization with the formation of the toner image, recording paper, OHP
The recording medium 2 such as a sheet is separated and fed one by one from a cassette 3a by a pickup roller 3b and a pressure contact member 3c pressed against the cassette 3a, and is conveyed by conveyance means 3 including a pair of conveyance rollers 3d and a pair of registration rollers 3e. Further, the toner image formed on the photosensitive drum 7 formed as a cartridge as the process cartridge B is transferred to the recording medium 2 by applying a voltage to a transfer roller 4 as a transfer unit, and the recording medium 2 is transferred by a transport belt 3f. The sheet is conveyed to the fixing unit 5.

【００１５】定着手段５は、駆動ローラ５ａとヒータ５
ｂを内蔵すると共に支持体５ｃで回転可能に支持された
筒状シートから成る定着回転体５ｄとから成り、通過す
る記録媒体２に熱及び圧力を印加して転写トナー像を記
録媒体２に定着する。そして、この記録媒体２を排出ロ
ーラ対３９，３ｈで搬送し、反転搬送経路を通して排出
部６へと排出するように構成している。尚、この画像形
成装置Ａは、手差しトレイ３ｉ及びローラ３ｊによって
手差し給紙も可能となっている。The fixing means 5 includes a driving roller 5a and a heater 5
and a fixing rotator 5d formed of a cylindrical sheet rotatably supported by a support 5c, and a heat and a pressure are applied to the recording medium 2 passing therethrough to fix the transferred toner image to the recording medium 2. I do. Then, the recording medium 2 is conveyed by a pair of discharge rollers 39 and 3h, and is discharged to the discharge unit 6 through a reverse conveyance path. Note that the image forming apparatus A is also capable of manual paper feeding by a manual tray 3i and a roller 3j.

【００１６】［プロセスカートリッジの構成］一方、前
記プロセスカートリッジＢは、電子写真感光体と、少な
くとも１つのプロセス手段を備えたものである。ここ
で、プロセス手段としては、例えば電子写真感光体を帯
電させる帯電手段、電子写真感光体に形成された潜像を
現像する現像手段、電子写真感光体表面に残留するトナ
ーをクリーニングするためのクリーニング手段等があ
る。[Configuration of Process Cartridge] On the other hand, the process cartridge B has an electrophotographic photosensitive member and at least one process means. Here, as the process means, for example, a charging means for charging an electrophotographic photosensitive member, a developing means for developing a latent image formed on the electrophotographic photosensitive member, and a cleaning for cleaning toner remaining on the surface of the electrophotographic photosensitive member There are means.

【００１７】本実施の形態に係るプロセスカートリッジ
Ｂは、図８に示すように、感光層を有する電子写真感光
体である感光ドラム７を回転駆動し、帯電手段である帯
電ローラ８へ電圧を印加して感光ドラム７の表面を一様
に帯電し、この帯電した感光ドラム７に対して光学系１
からの光像を開口部９を介して露光して静電潜像を形成
する。そして、該潜像を現像手段１０によって現像する
ように構成している。In the process cartridge B according to the present embodiment, as shown in FIG. 8, a photosensitive drum 7 which is an electrophotographic photosensitive member having a photosensitive layer is driven to rotate, and a voltage is applied to a charging roller 8 which is a charging means. The surface of the photosensitive drum 7 is uniformly charged, and an optical system 1
Is exposed through the opening 9 to form an electrostatic latent image. The developing unit 10 is configured to develop the latent image.

【００１８】上記現像手段１０は、トナー収納部１０ａ
内のトナーを送り手段である回転可能な第１送り部材１
０ｂ１及び第２送り部材ｌ０ｂ２で送り出す。そして、
固定磁石１０ｃを内蔵したトナー担持体である現像ロー
ラ１０ｄを回転させるとともに、現像ブレード１０ｅに
よって摩擦帯電電荷を付与したトナー層を現像ローラ１
０ｄの表面に形成し、現像バイアスを印加してトナーを
前記潜像に応じて感光ドラム７へ転移させることによっ
てトナー像を形成して可視像化する。The developing means 10 includes a toner storage section 10a.
Rotatable first feed member 1 serving as feed means for feeding the toner inside
0b1 and the second sending member 10b2. And
A developing roller 10d, which is a toner carrier having a fixed magnet 10c built therein, is rotated, and a toner layer provided with a triboelectric charge by a developing blade 10e is removed from the developing roller 1d.
Then, a toner image is formed by applying a developing bias to transfer the toner to the photosensitive drum 7 in accordance with the latent image to form a visible image.

【００１９】転写ローラ４に前記トナー像と逆極性の電
圧を印加してトナー像を記録媒体２に転写した後は、ク
リーニングブレード１１ａによって感光ドラム７に残留
したトナーを掻き落とすとともに、スクイシート１１ｂ
によってすくい取り、除去トナー収納部１１ｃへ集める
クリーニング手段１１によって感光ドラム７上の残留ト
ナーを除去するように構成している。After the toner image is transferred to the recording medium 2 by applying a voltage having a polarity opposite to that of the toner image to the transfer roller 4, the toner remaining on the photosensitive drum 7 is scraped off by the cleaning blade 11a, and the cleaning sheet 11b is removed.
The remaining toner on the photosensitive drum 7 is removed by the cleaning means 11 which is scooped and collected in the removed toner storage section 11c.

【００２０】本実施の形態に係るプロセスカートリッジ
Ｂは、トナー収納部１０ａを有する現像枠体１２ａと現
像下枠１２ｂ及び蓋部材１２ｃを一体的に溶着した現像
手段１０のフレームとしてのトナー現像枠体１２に現像
ローラ１０ｄ、現像ブレード１０ｅ等の各部材を収納す
る。そして、このトナー現像枠体１２と、感光ドラム
７、帯電ローラ８、クリーニング手段１１等の各部材を
収納したクリーニング枠体１３とを結合してカートリッ
ジ化され、装置本体１４に設けたカートリッジ装着手段
に対して着脱可能に装着される。The process cartridge B according to the present embodiment has a toner developing frame as a frame of the developing means 10 in which a developing frame 12a having a toner storage portion 10a, a lower developing frame 12b and a lid member 12c are integrally welded. 12, each member such as a developing roller 10d and a developing blade 10e is housed. Then, the toner developing frame 12 and the cleaning frame 13 accommodating the members such as the photosensitive drum 7, the charging roller 8, and the cleaning unit 11 are combined into a cartridge, and the cartridge mounting unit provided in the apparatus main body 14 is formed. It is detachably attached to.

【００２１】プロセスカートリッジＢの着脱は、図７に
示すように、軸１５ａを中心にして開閉部材１５を開い
て行うものであり、前記開閉部材１５を開くと装置本体
１４内にはカートリッジ装着スペースが設けてある。こ
の装着スペースの左右両側のフレーム１６には、図９に
示すように、カートリッジ装着ガイド部材１７が対向し
て取り付けてある（図９には一方側のみ図示）。As shown in FIG. 7, the mounting and dismounting of the process cartridge B is performed by opening and closing the opening and closing member 15 around the shaft 15a. Is provided. As shown in FIG. 9, cartridge mounting guide members 17 are attached to the frames 16 on both left and right sides of the mounting space so as to face each other (only one side is shown in FIG. 9).

【００２２】一方、プロセスカートリッジＢの長手方向
両外側面にはボス（図８参照）が突出形成されており、
このボス１８を前記左右のガイド部材１７とフレーム１
６とによって形成されるガイド溝１９に沿わせてプロセ
スカートリッジＢを挿入する。前記溝１９の奥部には凹
部１９ａが形成されており、この凹部１９ａに前記ボス
１８の軸部１８ａを落とし込んでプロセスカートリッジ
Ｂを装着する。このとき、感光ドラム７の長手方向端部
に取り付けた不図示のドラムギヤが装置本体１４に設け
られた駆動ギヤと噛合して感光ドラム７へ駆動伝達が行
われるようになる。On the other hand, bosses (see FIG. 8) are formed on both outer side surfaces in the longitudinal direction of the process cartridge B so as to protrude.
The boss 18 is connected to the left and right guide members 17 and the frame 1.
6, the process cartridge B is inserted along the guide groove 19 formed. A recess 19a is formed at the back of the groove 19, and the shaft portion 18a of the boss 18 is dropped into the recess 19a to mount the process cartridge B. At this time, a drum gear (not shown) attached to the longitudinal end of the photosensitive drum 7 meshes with a drive gear provided on the apparatus main body 14 so that the drive is transmitted to the photosensitive drum 7.

【００２３】［現像ローラの接点構成］次に、前記現像
ローラ１０ｄに現像バイアスを印加するための接点構造
を図１〜図６に基づいて説明する。[Contact Configuration of Developing Roller] Next, a contact structure for applying a developing bias to the developing roller 10d will be described with reference to FIGS.

【００２４】図１に示すように、現像ローラ１０ｄは、
アルミニウム、ステンレス鋼等の導電性・非磁性の円筒
状部材で構成され、その左右両端に嵌合固定したフラン
ジ部材２０ａ，２０ｂを備えている。右側のフランジ部
材２０ａは、現像ローラ１０ｄの右端部１０ｄＲに圧
入、接着、カシメ等の方法によって固定されており、現
像ローラ１０ｄの長手方向に沿って右端部１０ｄＲから
外側へ突き出た軸部２０ａ１を有する。前記軸部２０ａ
１は、その外周がトナー現像枠体１２とホルダー２４ａ
に固定された軸受２１ａによって回動白在に支持されて
いる。As shown in FIG. 1, the developing roller 10d
It is composed of a conductive and non-magnetic cylindrical member such as aluminum or stainless steel, and has flange members 20a and 20b fitted and fixed to both left and right ends thereof. The right flange member 20a is fixed to the right end 10dR of the developing roller 10d by a method such as press-fitting, bonding, caulking, or the like. Have. The shaft portion 20a
1 has a toner developing frame 12 and a holder 24a
Is supported in a rotationally white state by a bearing 21a fixed to the shaft.

【００２５】一方、現像ローラ１０ｄの左端部１０ｄＬ
にはアルミニウム、ステンレス鋼等の金属から成るフラ
ンジ部材２０ｂが圧入、カシメ等の機械的方法によって
固定されており、現像ローラ１０ｄの長手方向に沿って
左端部１０ｄＬから外側へ突き出たシリンダーとしての
軸部２０ｂ１を有する。シリンダーとしての軸部２０ｂ
１は、その外周がトナー現像枠体１２とホルダー２４ｂ
に固定された軸受２１ｂによって回動自在に支持されて
いる。そして、前記軸部２０ｂ１にはローラギヤ２２が
設けられている。これにより、現像ローラ１０ｄは感光
ドラム７に組み付けられたドラムギヤ（不図示）からロ
ーラギヤ２２へ駆動力が伝達され、現像ローラ１０ｄが
所定の回転数で回転駆動される。On the other hand, the left end 10dL of the developing roller 10d
A flange member 20b made of a metal such as aluminum or stainless steel is fixed by a mechanical method such as press-fitting or caulking, and a shaft as a cylinder protruding outward from a left end 10dL along the longitudinal direction of the developing roller 10d. It has a portion 20b1. Shaft 20b as cylinder
1 has a toner developing frame 12 and a holder 24b
Is rotatably supported by a bearing 21b fixed to the shaft. A roller gear 22 is provided on the shaft portion 20b1. As a result, the driving force of the developing roller 10d is transmitted from a drum gear (not shown) assembled to the photosensitive drum 7 to the roller gear 22, and the developing roller 10d is driven to rotate at a predetermined rotation speed.

【００２６】又、前記現像ローラ１０ｄには複数の極性
を有する磁石１０ｃが内包されている。磁石１０ｃは左
右両端に軸部１０ｃ１を有する。そして、この左右の軸
部１０ｃ１はそれぞれフランジ部材２０ａ，２０ｂの中
心孔２０ａ２，２０ｂ２を突き抜け、トナー現像枠体１
２に固定されたホルダー２４ａ，２４ｂの支持穴２４ａ
１，２４ｂ１に固定支持されている。The developing roller 10d includes a magnet 10c having a plurality of polarities. The magnet 10c has shaft portions 10c1 at both left and right ends. The left and right shaft portions 10c1 penetrate through the center holes 20a2, 20b2 of the flange members 20a, 20b, respectively, and the toner developing frame 1
2 support holes 24a of holders 24a, 24b fixed to
1, 24b1 fixedly supported.

【００２７】［第１の導電部（円筒電極及び固定接点）
の構成］図２及び図３に示すように、磁石１０ｃの軸と
しての左側の軸部（以下、「左側軸部」と称する）１０
ｃ１には導電性を有する円筒電極２８と固定接点２９が
組み付けられている。この円筒電極２８及び固定接点２
９は何れも第１の導電部を構成する構成部品である。[First conductive part (cylindrical electrode and fixed contact)]
2] As shown in FIG. 2 and FIG. 3, a left shaft portion (hereinafter, referred to as a "left shaft portion") 10 as a shaft of the magnet 10c.
A cylindrical electrode 28 having conductivity and a fixed contact 29 are assembled to c1. The cylindrical electrode 28 and the fixed contact 2
Numeral 9 is a component constituting the first conductive portion.

【００２８】円筒電極２８はトナー現像枠体１２の長手
方向（感光ドラム７の軸線方向）に沿って磁石１０ｃの
左側軸部１０ｃ１に設けられている。前記円筒電極２８
は現像ローラ１０ｄの軸線方向に延びる円筒としての円
筒部２８ｅを中央に有し、この円筒部２８ｅの左右両端
に前記現像ローラ１０ｄの軸線方向に延びた突出部とし
ての突起郁２８ａ，２８ｂを有する。そして、円筒部２
８ｅには現像ローラ１０ｄの軸線方向に沿ってスリット
２８ｃが形成されている。前記円筒部２８ｅの内径は磁
石１０ｃの左側軸部１０ｃ１の外径より僅かに小さくし
てある。このため、円筒部部２８ｅを磁石１０ｃの左側
軸部１０ｃ１に嵌めると、円筒部２８ｅが径方向に拡大
してスリット２８ｃを僅かに拡げ、そのスリット２８ｃ
を狭めようとする円筒部部２８ｅの左側軸部１０ｃ１へ
の締付力によって円筒電極２８が左側軸部１０ｃ１に固
定される。The cylindrical electrode 28 is provided on the left shaft portion 10c1 of the magnet 10c along the longitudinal direction of the toner developing frame 12 (axial direction of the photosensitive drum 7). The cylindrical electrode 28
Has a cylindrical portion 28e as a cylinder extending in the axial direction of the developing roller 10d at the center, and has protrusions 28a and 28b as projecting portions extending in the axial direction of the developing roller 10d at both left and right ends of the cylindrical portion 28e. . And the cylindrical part 2
8e, a slit 28c is formed along the axial direction of the developing roller 10d. The inner diameter of the cylindrical portion 28e is slightly smaller than the outer diameter of the left shaft portion 10c1 of the magnet 10c. For this reason, when the cylindrical portion 28e is fitted to the left shaft portion 10c1 of the magnet 10c, the cylindrical portion 28e expands in the radial direction to slightly expand the slit 28c, and the slit 28c
The cylindrical electrode 28 is fixed to the left shaft 10c1 by the tightening force on the left shaft 10c1 of the cylindrical portion 28e to narrow the diameter.

【００２９】磁石１０ｃの左側軸部１０ｃ１の根元部分
には、周方向に数箇所、左側軸部１ＯＣ１の半径方向に
突出して軸方向で先端側に延びた凸部１０ｃ２（本実施
の形態では３箇所）を設け、先端部分には、磁石１０ｃ
の磁極位置決めに用いる角度固定用のＤカット１０ｃ３
が形成されている。円筒電極２８は、円筒部２８ｅの左
側軸部１０ｃ１に対する回転を規制するため、図２に示
すように、円筒部２８ｅの右端側に設けた複数の突起部
２８ａがそれぞれ左側軸部１０ｃ１の根元部分の隣合う
凸部１０ｃ２間の凹部１０ｃ２２に係合するように左側
細部１０ｃ１に挿入される。そして、円筒電極２８の左
側軸部１０ｃ１への挿入は左側軸部１０ｃ１先端のＤカ
ット１０ｃ３の底面１０ｃ４に円筒部２８ｅの左端側の
端面２８ｄが一致した所で止められる。ここで、円筒部
２８ｅの端面２８ｄより突出した左端側の突起部２８ｂ
は左側軸部１０ｃ１のＤカット１０ｃ３の円弧部分１０
ｃ３１の円弧面上で左側軸部１０ｃ１を先端付近まで覆
えるように形成してある。又、磁石１０ｃの左側軸部１
０ｃ１の根元部分に設けた凸部１０ｃ２の外径（外接円
の直径）は、円筒電極２８の円筒部２８ｅの右端側に設
けた突起部２８ａの外径（外接円の直径）よりも大き
く、第２の導電部を構成する後述の摺動接点３０の摺動
腕３０ｃが固定接点２９に対して摺動する摺動接点部の
回転軌跡より小さくなっている。At the root portion of the left shaft portion 10c1 of the magnet 10c, several convex portions 10c2 projecting in the radial direction of the left shaft portion 1OC1 and extending toward the distal end side in the axial direction are provided at several locations in the circumferential direction. Location), and a magnet 10c
Angle cut Dc10c3 used for magnetic pole positioning
Are formed. As shown in FIG. 2, the cylindrical electrode 28 has a plurality of protrusions 28a provided on the right end side of the cylindrical portion 28e to restrict rotation of the cylindrical portion 28e with respect to the left shaft portion 10c1. Is inserted into the left side detail 10c1 so as to engage with the concave portion 10c22 between the adjacent convex portions 10c2. Then, the insertion of the cylindrical electrode 28 into the left shaft portion 10c1 is stopped when the left end surface 28d of the cylindrical portion 28e coincides with the bottom surface 10c4 of the D cut 10c3 at the tip of the left shaft portion 10c1. Here, the left end side protruding portion 28b protruding from the end surface 28d of the cylindrical portion 28e.
Is the circular arc portion 10 of the D cut 10c3 of the left shaft portion 10c1.
The left shaft portion 10c1 is formed so as to cover the vicinity of the tip on the arc surface of c31. Also, the left shaft portion 1 of the magnet 10c
The outer diameter (diameter of the circumscribed circle) of the convex portion 10c2 provided at the root portion of 0c1 is larger than the outer diameter (diameter of the circumscribed circle) of the protrusion 28a provided on the right end side of the cylindrical portion 28e of the cylindrical electrode 28, A sliding arm 30c of a sliding contact 30, which will be described later, constituting the second conductive portion is smaller than the rotation locus of the sliding contact portion sliding with respect to the fixed contact 29.

【００３０】前述のように磁石１０ｃの左側軸部１０ｃ
１に円筒電極２８を固定した後、固定接点２９を左側軸
部１０ｃ１の先端から根元部分まで挿入する。固定接点
２９は、中心に左側軸部１０ｃ１が貫通する貫通孔２９
ｃを設けた円板としての円板部２９ａと、該円板部２９
ａより内側に延びて左側細部ｌ０ｃ１への挿入方向下流
側に折り曲げられた複数の爪部２９ｂとを有する。これ
らの爪部２９ｂの爪部先端の内接円径は前述の円筒電極
２８の円筒部２８ｅの外径より小さくなっている。As described above, the left shaft portion 10c of the magnet 10c
After the cylindrical electrode 28 is fixed to 1, the fixed contact 29 is inserted from the tip of the left shaft portion 10c1 to the root portion. The fixed contact 29 has a through hole 29 through which the left shaft portion 10c1 penetrates at the center.
c, a disk portion 29a as a disk provided with
and a plurality of claw portions 29b extending inward from a and bent to the downstream side in the insertion direction into the left side detail 10c1. The diameter of the inscribed circle at the tip of each claw portion 29b is smaller than the outer diameter of the cylindrical portion 28e of the cylindrical electrode 28 described above.

【００３１】そして、この固定接点２９を左側軸部１０
ｃ１に先端側から挿入すると（図２参照）、爪部２９ｂ
の先端の内接円径と円筒電極２８の円筒部２８ｅの外径
との差分だけ爪部２９ｂが変形し、この変形に伴う力で
円筒電極２８と固定接点２９間の接点圧と固定力を確保
する。固定接点２９を更に左側軸部１０ｃ１の根元部分
まで挿入すると、固定接点２９は爪部２９ｂを左側軸部
１０ｃ１の前記根元部分の隣合う凸部１０ｃ２間の凹部
１０ｃ２２に収まる。これにより爪部２９ｂは円筒電極
２８の右端側の突起部２８ａと接触し、円板部２９ａが
左側軸部１０ｃ１の軸根元部１０ｃ５に密着するように
組み付けられる。ここで、磁石１０ｃの左側軸部１０ｃ
１の根元部分に設けた複数の凸部１０ｃ２の外接円の半
径は、固定接点２９の複数の爪部２９ａの曲げ根元部分
の内接円の半径より大きくなっている。The fixed contact 29 is connected to the left shaft 10
When inserted into c1 from the tip side (see FIG. 2), the claw portion 29b
The claw portion 29b is deformed by the difference between the diameter of the inscribed circle at the tip of the cylindrical electrode and the outer diameter of the cylindrical portion 28e of the cylindrical electrode 28. Secure. When the fixed contact 29 is further inserted to the root portion of the left shaft portion 10c1, the fixed contact 29 fits the claw portion 29b into the concave portion 10c22 between the adjacent convex portions 10c2 of the root portion of the left shaft portion 10c1. Thereby, the claw portion 29b comes into contact with the projection 28a on the right end side of the cylindrical electrode 28, and the disc portion 29a is assembled so as to be in close contact with the shaft root portion 10c5 of the left shaft portion 10c1. Here, the left shaft portion 10c of the magnet 10c
The radius of the circumscribed circle of the plurality of protrusions 10c2 provided at the root of the first contact portion is larger than the radius of the inscribed circle of the bent root of the plurality of claw portions 29a of the fixed contact 29.

【００３２】又、前記複数の凸部１０ｃ２の軸方向高さ
は、固定接点２９を軸根元部１０ｃ５に密着させたと
き、固定接点２９の爪部２９ａの爪部先端より高くなる
ようにしておくことによつて、円筒電極２８と固定接点
２９との接点部（突起部２８ａと爪部２９ｂ）を保護し
ている。The height of the plurality of projections 10c2 in the axial direction is higher than the tip of the claw 29a of the fixed contact 29 when the fixed contact 29 is brought into close contact with the shaft root 10c5. This protects the contact portion (protruding portion 28a and claw portion 29b) between the cylindrical electrode 28 and the fixed contact 29.

【００３３】［第２の導電部（摺動接点）の構成］図４
及び図５に示すように、接点台３１に第２の導電部とし
ての摺動接点３０を固定し、これを現像ローラ１０ｄの
内部に挿入して保持させている（図１参照）。[Configuration of Second Conductive Section (Sliding Contact)] FIG.
As shown in FIG. 5 and FIG. 5, a sliding contact 30 as a second conductive portion is fixed to the contact base 31 and inserted and held inside the developing roller 10d (see FIG. 1).

【００３４】接点台３１は円筒部３１ａにフランジ３１
ｂを形成し、このフランジ３１ｂの中央に貫通孔３１ｃ
を設けるとともに、前記フランジ３１ｂの端面３１ｄに
ダボ３１ｅを設けたものである。この接点台３１は樹脂
を射出成形等で形成したものであり、絶縁性である。The contact base 31 has a flange 31 on the cylindrical portion 31a.
b, and a through hole 31c is formed in the center of the flange 31b.
And a dowel 31e is provided on an end face 31d of the flange 31b. The contact base 31 is made of resin by injection molding or the like, and is insulative.

【００３５】摺動接点３０は導電性を有し、装置本体１
４から現像ローラ１０ｄに現像バイアスを供給するため
の給電部品として用いられる。前記摺動接点３０は、接
点台３１のフランジ３１ｂに密着する基体としての円板
部３０ａと、この円板部３０ａの半径方向へ延びて現像
ローラ１０ｄへの挿入方向下流側へ曲げられた複数（本
実施の形態では２箇所）の爪部（第１の接触部）３０ｂ
と、円板部３０ａの中心を通り、円板面３０ａ１に垂直
な直線を軸とする螺旋軌跡（図示せず）に沿って略螺旋
状に形成された２本の摺動腕（第２の接触部）３０ｃと
を有する。そして、基体としての円板部３０ａの中心に
は接点台３１の貫通孔３１ｃと略同径の貫通孔３０ｄが
設けられており、又、円板部３０ａには接点台３１のダ
ボ３１ｅが嵌合する接点台取付用の取付穴３０ｅが設け
られている。The sliding contact 30 has conductivity, and the device body 1
4 is used as a power supply component for supplying a developing bias to the developing roller 10d. The sliding contact 30 includes a disk portion 30a as a substrate that is in close contact with the flange 31b of the contact base 31, and a plurality of sliding contacts extending in the radial direction of the disk portion 30a and bent downstream in the insertion direction into the developing roller 10d. (Two places in the present embodiment) claw portions (first contact portions) 30b
And two sliding arms (second sliding arms) formed substantially spirally along a spiral locus (not shown) passing through the center of the disk portion 30a and perpendicular to the disk surface 30a1 as an axis. (Contact part) 30c. A through hole 30d having substantially the same diameter as the through hole 31c of the contact base 31 is provided at the center of the disk part 30a as a base, and a dowel 31e of the contact base 31 is fitted into the disk part 30a. A corresponding mounting hole 30e for mounting the contact block is provided.

【００３６】接点台３１と摺動接点３０は次のように組
み付けられて一体化される。The contact base 31 and the sliding contact 30 are assembled and integrated as follows.

【００３７】即ち、接点台３１のダボ３１ｅに摺動接点
３０の取付穴３０ｅを嵌合させ、熱、超音波等でダボ３
１ｅを変形させることによって（図５参照）、摺動接点
３０と接点台３１とを固定する。ここで、摺動接点３０
の取付穴３０ｅと接点台３１のダボ３１ｅは摺動接点３
０の中心と接点台３１の中心が等しく合致するように形
成されている。That is, the mounting hole 30e of the sliding contact 30 is fitted into the dowel 31e of the contact base 31, and the dowel 3e is heated, ultrasonically or the like.
By deforming 1e (see FIG. 5), the sliding contact 30 and the contact base 31 are fixed. Here, the sliding contact 30
Mounting hole 30e and the dowel 31e of the contact base 31
The center of the contact point 31 and the center of 0 are formed so as to be equal.

【００３８】前記接点台３１と拍動接点３０との結合物
は、図５に示すように、現像ローラ１０ｄの内部に挿入
される。詳しくは、現像ローラ１０ｄの左端部に駆動側
のフランジ部材２０ｂが結合された状態で、前記結合物
は現像ローラ１０ｄの内部に開放されている右端部１０
ｄＲ側より接点台３１側から挿入される。そして、前記
結合物を現像ローラ１０ｄの内部に右端部１０ｄＲ側よ
り接点台３１側から挿入していくと、接点台３１の円筒
部３１ａがフランジ部材２０ｂの内部に軸部２０ｂ１と
同軸に形成された穴部２０ｂ２と嵌合する。これによっ
て、摺動接点３０を現像ローラ１０ｄと同軸上に配置す
ることができる。The combination of the contact base 31 and the pulsating contact 30 is inserted into the developing roller 10d as shown in FIG. More specifically, in a state where the flange member 20b on the driving side is coupled to the left end of the developing roller 10d, the combined material is released to the right end 10 opened inside the developing roller 10d.
It is inserted from the contact table 31 side from the dR side. When the combined material is inserted into the developing roller 10d from the right end 10dR side from the contact stand 31 side, the cylindrical part 31a of the contact stand 31 is formed coaxially with the shaft part 20b1 inside the flange member 20b. Into the hole 20b2. Thus, the sliding contact 30 can be arranged coaxially with the developing roller 10d.

【００３９】そして、前記結合物の現像ローラ１０ｄ内
部への挿入は接点台３１のフランジ３１ｂがフランジ部
材２０ｂの内部の穴部２０ｂ２の手前で内部端面２０ｂ
３に突き当たることで終了する。現像ローラ１０ｄ内へ
挿入された摺動接点３０は爪部３０ｂを変形させること
で現像ローラ１０ｄの内壁面（内面）１０ｄ１との接触
圧を得る。ここで、爪部３０ｂは前述のように円板部３
０ａの半径方向に延びているとともに現像ローラ１０ｄ
内部への挿入方向下流側に曲げられているため、挿入時
には撓み易く、しかも、抜き方向へは爪部先端が現像ロ
ーラ１０ｄの内壁面１０ｄ１に喰い込む方向ヘ力が加わ
るようになっている。このため、前記爪部３０ｂｂは現
像ローラ１０ｄに対する摺動接点３０の抜け止めとして
の機能を果たす。Then, the insertion of the combined product into the developing roller 10d is performed when the flange 31b of the contact base 31 is in front of the hole 20b2 inside the flange member 20b.
It ends when it hits No.3. The sliding contact 30 inserted into the developing roller 10d obtains a contact pressure with the inner wall surface (inner surface) 10d1 of the developing roller 10d by deforming the claw portion 30b. Here, the claw portion 30b is connected to the disk portion 3 as described above.
0a and the developing roller 10d.
Since it is bent downstream in the direction of insertion into the interior, it easily bends at the time of insertion, and a force is applied to the direction in which the tip of the claw bites into the inner wall surface 10d1 of the developing roller 10d in the removal direction. For this reason, the claw portion 30bb functions as a stopper for the sliding contact 30 with respect to the developing roller 10d.

【００４０】［現像ローラと磁石の結合］前述のよう
に、現像ローラ１０ｄは摺動接点３０を内部に支持して
その摺動接点３０と電気的導通を有する１つの単組品と
なる。又、磁石１０ｃは左側軸部１０ｃ１に円筒電極２
８が被さり、その円筒電極２８と電気的導通を有して左
側軸部１０ｃ１の軸元本１０ｃ５に固定された固定接点
２９を支持した１つの単組品となる。そして、この２つ
の単組品は次のようにして結合される。[Coupling of Developing Roller and Magnet] As described above, the developing roller 10d is a single assembly that supports the sliding contact 30 inside and has electrical continuity with the sliding contact 30. The magnet 10c has a cylindrical electrode 2 on the left shaft 10c1.
8 covers the cylindrical electrode 28 and forms a single unit that has electrical continuity with the cylindrical electrode 28 and supports a fixed contact 29 fixed to the axial principal component 10c5 of the left shaft portion 10c1. Then, the two single assemblies are combined as follows.

【００４１】即ち、図６に示すように、現像ローラ１０
ｄの開放されている右端部１０ｄＲ側から磁石１０ｃを
円筒電極２８が組み付けられた左側軸部１０ｃ１を先に
して挿入していく。すると、摺動接点３０の摺動腕３０
ｃと固定接点２９の円板部２９ａの円板表面２９ａ１
（図３参照）が当接し、これより更に磁石１０ｃを挿入
していくと、摺動接点３０の摺動腕３０ｃが弾性的に変
形して反発力を高めるが、磁石１０ｃに設けた凸部１０
ｃ２の軸方向先端面１０ｃ２１（図３参照）が摺動接点
３０の円板部３０ａの円板面３０ａ１（図５参照）に当
接し、磁石１０ｃのこれ以上の挿入ができないことを知
らせる。That is, as shown in FIG.
The magnet 10c is inserted from the right end 10dR side where d is opened, with the left shaft portion 10c1 to which the cylindrical electrode 28 is assembled being inserted first. Then, the sliding arm 30 of the sliding contact 30
c and the disk surface 29a1 of the disk portion 29a of the fixed contact 29
(See FIG. 3), when the magnet 10c is further inserted, the sliding arm 30c of the sliding contact 30 is elastically deformed to increase the repulsive force. 10
The axial end surface 10c21 of c2 (see FIG. 3) abuts on the disk surface 30a1 (see FIG. 5) of the disk portion 30a of the sliding contact 30 to inform that the magnet 10c cannot be inserted any further.

【００４２】そして、現像ローラ１０ｄの開放されてい
る右端部１０ｄＲにフランジ部材２０ａを圧入、カシ
メ、熱嵌め等の手段で組み付けることによって、図１に
示すような現像ローラユニットＤＵが構成される。この
現像ローラユニットＤＵは前述のように、フランジ部材
２０ａ，２０ｂをトナー現像枠体１２とホルダー２４
ａ，２４ｂとで支持された軸受２１ａ，２１ｂによって
回転自在に支持され、磁石１０ｃの両端の軸部１０ｃ１
をホルダー２４ａ，２４ｂに設けた支持穴２４ａ１，２
４ｂ１に嵌合させることで固定支持される。尚、支持穴
２４ｂ１は磁石１０ｃの角度決めためのＤカットを有す
る穴となっている。Then, the developing roller unit DU as shown in FIG. 1 is formed by assembling the flange member 20a to the open right end 10dR of the developing roller 10d by means such as press-fitting, caulking, or hot-fitting. As described above, the developing roller unit DU includes the flange members 20a and 20b and the toner developing frame 12 and the holder 24.
The shafts 10c1 at both ends of the magnet 10c are rotatably supported by bearings 21a, 21b supported by the magnets 10a, 21b.
Are provided in holders 24a, 24b.
4b1 to be fixedly supported. The support hole 24b1 is a hole having a D cut for determining the angle of the magnet 10c.

【００４３】［第３の導電部（固定電極部材）の構成］
ここで、図１に示すように、トナー現像枠体１２のホル
ダー２４ｂには、導電性を有する第３の導電部としての
固定電極部材２５が固定されている。ホルダー２４ｂ
は、前述のＤカットを有する支持穴２４ｂ１によって、
現像ローラユニットＤＵの円筒電極２８が嵌められた磁
石１０ｃの左側軸部１０ｃ１先端のＤカット１０ｃ３を
支持している。前記固定電極部材２５は、現像ローラ１
０ｄの長手方向の一端側に位置する前記ホルダー２４ｂ
に支持穴２４ｂ１と連通して設けた切欠き部２４ｂ２に
入り込み、円筒電極２８の左端側の突起部２８ｂと当接
する接点部（第１の電気接点部）２５ｂを有する。[Configuration of Third Conductive Section (Fixed Electrode Member)]
Here, as shown in FIG. 1, a fixed electrode member 25 as a third conductive portion having conductivity is fixed to the holder 24b of the toner developing frame 12. Holder 24b
Is formed by the support hole 24b1 having the above-mentioned D cut.
The D-cut 10c3 at the tip of the left shaft portion 10c1 of the magnet 10c on which the cylindrical electrode 28 of the developing roller unit DU is fitted is supported. The fixed electrode member 25 is provided with the developing roller 1.
0d, the holder 24b located at one end in the longitudinal direction.
And a notch 24b2 provided in communication with the support hole 24b1 and a contact portion (first electrical contact portion) 25b that comes into contact with the projection 28b on the left end side of the cylindrical electrode 28.

【００４４】又、装置本体１４の本体電気接点である装
置側接点２６と接続するために前記ホルダー２４ｂに外
部に露出して設けた露出部（第２の電気接点部）２５ａ
を有する。そして、前記接点部２５ｂと露出部２５ａは
一体に形成されている。An exposed portion (second electrical contact portion) 25a is provided on the holder 24b so as to be exposed to the outside so as to be connected to the device side contact 26 which is a main body electrical contact of the device body 14.
Having. The contact portion 25b and the exposed portion 25a are formed integrally.

【００４５】第１の電気接点部としての接点部２５ｂ
は、円筒電極２８の左端側の突起部２８ｂに当接して弾
性変形し、その弾性変形による反発力（弾性力）をもっ
て前記突起部２８ｂに当接している。円筒電極２８の左
端側の突起部２８ｂは前述のように磁石１０ｃの角度固
定を行うために左側軸部１０ｃ１の先端に設けられたＤ
カット１０ｃ３の円弧部分１０ｃ３１の円弧面上に位置
するように設計されている。Contact portion 25b as first electrical contact portion
Abuts on the projection 28b on the left end side of the cylindrical electrode 28 and is elastically deformed, and abuts on the projection 28b with a repulsive force (elastic force) due to the elastic deformation. The protrusion 28b on the left end side of the cylindrical electrode 28 is provided at the tip of the left shaft portion 10c1 to fix the angle of the magnet 10c as described above.
It is designed to be located on the arc surface of the arc portion 10c31 of the cut 10c3.

【００４６】円筒電極２８の左端側の突起部２８ｂは、
固定電極部材２５の接点部２５ｂにより左側軸部１０ｃ
のラジアル方向の反発力を受けることによってＤカット
１０ｃ３の円弧部分１０ｃ３１の円弧面上に付勢され
る。これにより、左側軸部１０ｃ１のＤカット１０ｃ３
が固定電極部材２５の接点部２５ｂを介して円筒電極２
８の突起部２８ｂにより円弧部分１０ｃ３１から平坦部
分１０ｃ３２に向かって付勢される。これによって、ホ
ルダー２４ｂの支持穴２４ｂ１と磁石１０ｃの左側軸部
１０ｃ１のＤカット１０ｃ３との嵌合ガタによる磁石１
０ｃの角度ズレを防止することができ、磁石１０ｃのラ
ジアル方向での支持精度の向上を図ることができる。The protrusion 28b on the left end side of the cylindrical electrode 28 is
The left shaft portion 10c is formed by the contact portion 25b of the fixed electrode member 25.
Of the D-cut 10c3 on the circular-arc surface of the D-cut 10c3. Thereby, the D cut 10c3 of the left shaft portion 10c1 is obtained.
Is the cylindrical electrode 2 through the contact portion 25b of the fixed electrode member 25.
The projections 28b are urged from the arc portion 10c31 toward the flat portion 10c32. As a result, the magnet 1 due to the looseness of the fitting between the support hole 24b1 of the holder 24b and the D cut 10c3 of the left shaft portion 10c1 of the magnet 10c.
0c can be prevented, and the accuracy of supporting the magnet 10c in the radial direction can be improved.

【００４７】又、摺動接点３０の摺動腕３０ｃは、前述
のように円板部３０ａの中心を通る円板面に垂直な直線
を軸とする螺旋形状をしているため、固定接点２９の円
板部２９ａとの当接における接触圧は現像ローラ１０
ｄ、磁石１０ｃの軸線方向へ作用する。これによって現
像ローラ１０ｄと磁石１０ｃは共に離れる方向に移動可
能となる。このため、現像ローラ１０ｄと磁石１０ｃは
それぞれの軸線方向のガタ分だけ移動し、互いに軸線方
向の一端が軸受２１ａ，２１ｂやホルダー２４ａ，２４
ｂに当接するようになる。The sliding arm 30c of the sliding contact 30 has a helical shape whose axis is a straight line perpendicular to the disk surface passing through the center of the disk portion 30a as described above. Of the developing roller 10 in contact with the disk portion 29a
d. Acts in the axial direction of the magnet 10c. As a result, the developing roller 10d and the magnet 10c can move in a direction away from each other. For this reason, the developing roller 10d and the magnet 10c move by the amount of play in the respective axial directions, and one ends in the axial direction of the developing rollers 10d and the magnets 10c and the holders 24a, 24b.
b.

【００４８】即ち、前記摺動接点３０の摺動腕３０ｃ
は、現像ローラ１０ｄと磁石１０ｃを軸線方向において
反対方向へ付勢する付勢手段として機能するため、磁石
１０ｃの軸方向での位置精度が高められる。これによ
り、前述した固定電極部材２５の接点部２５ｂによる磁
石１０ｃのラジアル方向での支持精度の向上と相俟って
摺動接点３０の摺動腕３０ｃによる磁石１０ｃの軸方向
での位置精度が高められる。その結果、電子写真画像形
成プロセスの現像工程において、現像ローラ１０ｄに現
像バイアスを印加し、現像ローラ１０ｄ表面のトナーを
感光ドラム７の静電潜像に応じて転移させることにより
トナー像を形成する際の静電潜像の現像性の向上に効果
がある。That is, the sliding arm 30c of the sliding contact 30
Functions as an urging means for urging the developing roller 10d and the magnet 10c in opposite directions in the axial direction, so that the positional accuracy of the magnet 10c in the axial direction is improved. Accordingly, the positional accuracy in the axial direction of the magnet 10c by the sliding arm 30c of the sliding contact 30 is improved in combination with the improvement in the radial support accuracy of the magnet 10c by the contact portion 25b of the fixed electrode member 25 described above. Enhanced. As a result, in the developing step of the electrophotographic image forming process, a developing bias is applied to the developing roller 10d, and a toner image is formed by transferring the toner on the surface of the developing roller 10d according to the electrostatic latent image on the photosensitive drum 7. This is effective in improving the developability of the electrostatic latent image at that time.

【００４９】第２の電気接点部としての露出部２５ａ
は、トナー現像枠体１２のホルダー２４ｂにおいて、前
記現像ローラユニットＤＵを組み込んだプロセスカート
リッジＢを装置本体１４に装着した際に、装置本体１４
の電源２７と接続された本体電気接点である装置側接点
２６と接触する位置に設けられている。これにより、装
置本体１４にプロセスカートリッジＢを装着すると、ト
ナー現像枠体１２のホルダー２４ｂ外部に露出した固定
電極部材２５の露出部２５ａが装置本体１４の電源２７
と接続された装置側接点２６と接触する。Exposed portion 25a as second electrical contact portion
When the process cartridge B incorporating the developing roller unit DU is mounted on the apparatus main body 14 in the holder 24b of the toner developing frame 12,
The power supply 27 is provided at a position where it comes into contact with the device side contact 26 which is a main body electrical contact connected to the power supply 27. Thus, when the process cartridge B is mounted on the apparatus main body 14, the exposed portion 25a of the fixed electrode member 25 exposed to the outside of the holder 24b of the toner developing frame 12 is connected to the power supply 27 of the apparatus main body 14.
Contacts with the device-side contact 26 connected to the terminal.

【００５０】これによって、装置本体１４の電源２７と
現像ローラ１０ｄとは、前記装置側接点２６と固定電
極部材２５の露出部２５ａ、固定電極部材２５の接点
部２５ｂと円筒電極２８の左端側の突起部２８ｂ、円
筒電極２８の右端側の突起部２８ａと固定接点２９の爪
部２９ｂ、固定接点２９の円板部２９ａと摺動接点３
０の摺動腕３０ｃ、摺動接点３０の爪部３０ｂから現
像ローラ１０ｄ内壁面１０ｄ１という経路を経て電気的
に接続される。これにより、現像ローラ１０ｄへの現像
バイアスの印加が可能となる。As a result, the power supply 27 of the apparatus main body 14 and the developing roller 10d are connected to the apparatus side contact 26, the exposed part 25a of the fixed electrode member 25, the contact part 25b of the fixed electrode member 25, and the left end of the cylindrical electrode 28. The protrusion 28b, the protrusion 28a on the right end side of the cylindrical electrode 28 and the claw 29b of the fixed contact 29, the disk portion 29a of the fixed contact 29 and the sliding contact 3
The sliding arm 30c of No. 0 and the claw portion 30b of the sliding contact 30 are electrically connected via a path of the inner wall surface 10d1 of the developing roller 10d. This makes it possible to apply a developing bias to the developing roller 10d.

【００５１】ここで、前記の固定接点２９の円板部２
９ａと摺動接点３０の摺動腕３０ｃの電気的接続は摺動
接点となり、この摺動接点の摺動接点部（円板部２９ａ
と摺動腕３０ｃとの摺動部）の摩耗や摺動接点部の傷等
によって現像バイアスの印加に変動を来す場合があるた
め、導電グリスを塗布しておくのが好ましい。Here, the disk portion 2 of the fixed contact 29
The electrical connection between the sliding contact 9a and the sliding arm 30c of the sliding contact 30 becomes a sliding contact.
Since application of the developing bias may fluctuate due to abrasion of the sliding portion between the sliding arm 30c and the sliding contact portion, or damage to the sliding contact portion, it is preferable to apply conductive grease.

【００５２】この場合、本実施の形態においては、前記
摺動接点部を現像ローラ１０ｄ内部に配置したことによ
って、現像ローラユニットＤＵをトナー現像枠体１２へ
組み付ける際に作業の邪魔になることがない。その上、
この現像ローラユニットＤＵの外部へ導電グリスが漏れ
出す恐れもなく、外部からのダストの侵入も少なくな
り、導電グリスの性能を維持することが可能となる。こ
のため、固定接点２９の円板部２９ａと摺動接点３０の
摺動腕３０ｃの電気的接点の信頼性向上に効果がある。In this case, in the present embodiment, since the sliding contact portion is disposed inside the developing roller 10d, it may hinder the operation when the developing roller unit DU is assembled to the toner developing frame 12. Absent. Moreover,
There is no danger of the conductive grease leaking out of the developing roller unit DU, the intrusion of dust from the outside is reduced, and the performance of the conductive grease can be maintained. This is effective in improving the reliability of the electrical contact between the disk portion 29a of the fixed contact 29 and the sliding arm 30c of the sliding contact 30.

【００５３】又、磁石１０ｃの左側軸部１０ｃ１の根元
部分に複数設けた凸部ｌ０ｃ１は、既に述べたように、
現像ローラユニットＤＵの組み立ての際に現像ローラ１
０ｄ内部への磁石１０ｃの挿入の終了を伝えることを説
明したが、これ以外にも次のような機能を有するもので
ある。The plurality of convex portions 10c1 provided at the root of the left shaft portion 10c1 of the magnet 10c are, as described above,
When assembling the developing roller unit DU, the developing roller 1
It has been described that the completion of insertion of the magnet 10c into the inside of 0d has been described. However, it has the following functions in addition to this.

【００５４】即ち、本実施の形態で示す現像ローラユニ
ットＤＵを組み込んだプロセスカートリッジＢに輸送中
や保管中において現像ローラユニットＤＵの軸線方向
（現像ローラ１０ｄの軸線方向）への衝撃が加えられた
場合、凸部１０ｃ３の軸方向先端面１０ｃ２１がフラン
ジ部材２０ｂ内で接点台３１に固定されている摺動接点
３０の円板部３０ａに当接する（図１参照）。このた
め、摺動接点３０の摺動腕３０ｃに過剰な力が加わって
塑性変形を生じるのを防止する機能がある。これによっ
て、摺動接点３０の摺動腕３０ｃによる固定接点２９の
円板部２９ａへの電気的接点の信頼性向上に効果があ
る。That is, during transportation or storage, the process cartridge B incorporating the developing roller unit DU shown in this embodiment receives an impact in the axial direction of the developing roller unit DU (axial direction of the developing roller 10d). In this case, the distal end face 10c21 in the axial direction of the projection 10c3 comes into contact with the disk portion 30a of the sliding contact 30 fixed to the contact base 31 in the flange member 20b (see FIG. 1). For this reason, there is a function of preventing an excessive force from being applied to the sliding arm 30c of the sliding contact 30 and causing plastic deformation. This is effective in improving the reliability of the electrical contact to the disk portion 29a of the fixed contact 29 by the sliding arm 30c of the sliding contact 30.

【００５５】又、前記磁石１０ｃの細い左側軸部１０ｃ
の根元部分の周囲に凸部１０ｃ３を複数設けることで軸
根元の径を拡大して軸根元部分の強度向上を図ることが
できる。これにより、輸送時に落下衝撃が加えられた場
合でも、左側軸部１０ｃが根元部分で折れるようなこと
を防止することができる。その上、前記左側軸部１０ｃ
１に金属製の円筒電極２８が嵌められているため、軸根
元部分の更なる強度向上が図れる。The thin left shaft portion 10c of the magnet 10c
By providing a plurality of protrusions 10c3 around the root of the shaft, the diameter of the shaft root can be enlarged and the strength of the shaft root can be improved. Thereby, even when a drop impact is applied during transportation, it is possible to prevent the left shaft portion 10c from breaking at the root portion. In addition, the left shaft portion 10c
Since the metal cylindrical electrode 28 is fitted on the shaft 1, the strength of the shaft root portion can be further improved.

【００５６】［固定接点及び摺動接点の交換方法］ここ
で、前述した構成のカートリッジにおいて、使用後トナ
ーが無くなり寿命となったカートリッジの再生産時にお
ける固定接点２９及び摺動接点３０の交換方法について
説明する。[Method of Replacing Fixed Contact and Sliding Contact] Here, the method of replacing the fixed contact 29 and the sliding contact 30 at the time of remanufacture of a cartridge having the above-described configuration, which has run out of toner after use and has reached the end of its life. Will be described.

【００５７】これら固定接点２９及び摺動接点３０の交
換は図１２で示した手順により行われる。以下、図１２
の手順に沿って説明する。The replacement of the fixed contact 29 and the sliding contact 30 is performed according to the procedure shown in FIG. Hereinafter, FIG.
Will be described in accordance with the procedure.

【００５８】先ず、図１に示す現像手段１０より現像ロ
ーラユニットＤＵを取り出し（）、取り出してきた現
像ローラユニットＤＵの右端側に固定されているフラン
ジ部材２０ａを取り外す（）。そして、前記フランジ
部材２０ａを取り外したことで開放された現像ローラの
右端部１０ｄＲから磁石１０ｃを引き出してくる（）
と磁石１０ｃの左端部には図３に示すように円筒電極２
８と固定接点２９が組み付けられている。First, the developing roller unit DU is taken out from the developing means 10 shown in FIG. 1 (), and the flange member 20a fixed to the right end side of the taken out developing roller unit DU is removed (). Then, the magnet 10c is pulled out from the right end 10dR of the developing roller opened by removing the flange member 20a ().
And a cylindrical electrode 2 as shown in FIG.
8 and the fixed contact 29 are assembled.

【００５９】ここで、固定接点２９はその中心に設けら
れた貫通孔２９ｃを磁石１０ｃの左側軸部１０ｃ１が貫
通するように左側軸部１０ｃ１の根元まで挿入されてお
り、爪部２９ｂが円筒電極２８の外周に圧接することで
固定されている。そして、図１０に示すように、この固
定接点２９を磁石の左側軸部１０ｃ１の根元の位置Ｘか
ら先端方向（即ち、矢印ｙ方向）に引き出して取り去
り、磁石１０ｃに使用可能な別の固定接点２９’を、取
り去った固定接点２９が取り付けてあった同じ位置に同
様の方法で、取り付ける( −ａ) 。即ち、固定接点２
９’を左側軸部の先端側から貫通孔２９’ｃを左側軸部
１０ｃ１に貫通させて左端軸部の根元の位置Ｘまで挿入
する。固定接点の爪部２９’ｂの内接円径は円筒部材２
８の外径よりも小さくなっているため、爪部が円筒電極
の外周面に圧接し固定接点２９’が固定される。Here, the fixed contact 29 is inserted up to the base of the left shaft portion 10c1 so that the left shaft portion 10c1 of the magnet 10c passes through the through hole 29c provided at the center thereof, and the claw portion 29b is connected to the cylindrical electrode. It is fixed by being pressed against the outer periphery of 28. Then, as shown in FIG. 10, the fixed contact 29 is pulled out from the base position X of the left shaft portion 10c1 of the magnet in the tip direction (ie, the direction of the arrow y) and removed, and another fixed contact usable for the magnet 10c. 29 'is attached in the same manner to the same position where the removed fixed contact 29 was attached (-a). That is, the fixed contact 2
9 'is inserted through the through hole 29'c through the left shaft portion 10c1 from the distal end of the left shaft portion to the position X at the base of the left end shaft portion. The inscribed circle diameter of the claw portion 29'b of the fixed contact is the cylindrical member 2
8 is smaller than the outer diameter of the cylindrical electrode 8, the claw portion is pressed against the outer peripheral surface of the cylindrical electrode, and the fixed contact 29 'is fixed.

【００６０】又、磁石１０ｃが引き出された現像ローラ
１０ｄの内部には、図５及び図６に示すように、接点台
３１に結合された摺動接点３０が組み付けられている。
ここで、摺動接点３０は現像ローラ１０ｄと同軸上で前
記接点台３１のフランジ３１ｂがフランジ部材２０ｂの
内部端面２０ｂ３に突き当たった位置に挿入されてお
り、爪部３０ｂが現像ローラ１０ｄの内壁面１０ｄ１に
圧接することで固定されている。そして、図１１に示す
ように、この摺動接点３０と接点台３１との結合物を現
像ローラ１０ｄの内部左端の位置Ｕから右端方向（即
ち、矢印ｖ方向）に引き出して現像ローラ１０ｄの右端
部１０ｄＲから取り去り、現像ローラ１０ｄ内部に使用
可能な別の摺動接点３０’と接点台３１’との結合物
を、取り去った摺動接点３０と接点台３１との結合物が
取り付けてあった同じ位置に同様の方法で取り付ける
（−ｂ）。即ち、摺動接点３０’と接点台３１’との
結合物を現像ローラ１０ｄの右端部１０ｄＲより接点台
３１’側から現像ローラ１０ｄ内部の左端の位置Ｕまで
挿入する。摺動接点３０’の爪部３０’ｂが現像ローラ
１０ｄの内壁面１０ｄ１に圧接して固定接点３０’が固
定される。As shown in FIGS. 5 and 6, a sliding contact 30 connected to a contact base 31 is assembled inside the developing roller 10d from which the magnet 10c is pulled out.
Here, the sliding contact 30 is inserted coaxially with the developing roller 10d at a position where the flange 31b of the contact base 31 abuts against the inner end surface 20b3 of the flange member 20b, and the claw portion 30b is inserted into the inner wall surface of the developing roller 10d. It is fixed by pressing against 10d1. Then, as shown in FIG. 11, the combined product of the sliding contact 30 and the contact base 31 is pulled out from the position U on the inner left end of the developing roller 10d toward the right end (that is, the direction of arrow v), and the right end of the developing roller 10d is drawn. The combined product of another sliding contact 30 ′ and the contact base 31 ′ removed from the portion 10 dR and usable inside the developing roller 10 d was attached to the removed combined product of the sliding contact 30 and the contact base 31. Attach to the same position in the same manner (-b). That is, the combined product of the sliding contact 30 'and the contact base 31' is inserted from the right end 10dR of the developing roller 10d to the left end position U inside the developing roller 10d from the contact base 31 'side. The fixed contact 30 'is fixed by pressing the claw portion 30'b of the sliding contact 30' against the inner wall surface 10d1 of the developing roller 10d.

【００６１】そして、固定接点２９’が取り付けられた
磁石１０ｃを（現像ローラ１０ｄと磁石１０ｃの結合）
で述べたのと同様に結合し（）、この現像ローラユニ
ットＤＵを現像装置１０に取り付ける（）ことで固定
接点の交換が完了する。Then, the magnet 10c to which the fixed contact 29 'is attached is connected (coupling of the developing roller 10d and the magnet 10c).
The connection is completed in the same manner as described above, and the replacement of the fixed contacts is completed by attaching the development roller unit DU to the developing device 10 ().

【００６２】上述の方法で、互いに摺動接触しているた
め摺動部が摩耗する固定接点及び摺動接点を再生産時に
交換することが可能となる。又、摩耗を軽減するため及
び接点部の信頼性をアップするために前記摺動部には導
電グリスを塗布することが望ましいが、前述したように
固定接点及び摺動接点を再生産時に交換する場合におい
ては、新たに組み入れる固定接点２９’若しくは摺動接
点３０’の摺動部に予め導電グリスを塗布しておくか、
若しくは固定接点及び摺動接点を交換した後で且つ磁石
を現像ローラ内部に挿入する前に固定接点２９’若しく
は摺動接点３０’の摺動部に導電グリスを塗布すること
で前記摺動部に無理なく導電グリスを介在させることが
できる。In the above-described method, the fixed contact and the sliding contact whose sliding portions are worn due to sliding contact with each other can be replaced at the time of reproduction. Further, it is desirable to apply conductive grease to the sliding portion in order to reduce abrasion and increase the reliability of the contact portion. However, as described above, the fixed contact and the sliding contact are replaced at the time of reproduction. In such a case, conductive grease is previously applied to the sliding portion of the fixed contact 29 ′ or the sliding contact 30 ′ to be newly incorporated,
Alternatively, conductive grease is applied to the sliding portion of the fixed contact 29 ′ or the sliding contact 30 ′ after the fixed contact and the sliding contact are replaced and before the magnet is inserted into the developing roller. The conductive grease can be easily interposed.

【００６３】ここで、前述した固定接点及び摺動接点の
交換方法は次のように表される。マグネット（磁石１０
ｃ）を現像ローラ（現像ローラ１０ｄ）の内部から取り
出して第１導電部を構成し、且つ、第２導電部と摺動接
触している導電部品（固定接点２９）又は前記第２導電
部を構成し且つ前記第１導電部と摺動接触している導電
部品（摺動接点３０）若しくはその両方を取り外し、前
記導電部品（固定接点２９、摺動接点３０）の交換部品
（固定接点２９’、摺動接点３０’）を取り付けた後、
前記マグネット（磁石１０ｃ）を前記現像ローラ（現像
ローラ１０ｄ）の内部に、取り出す前と同様に配置する
ことにより前記導電部品を交換する。Here, the method of replacing the fixed contacts and the sliding contacts described above is expressed as follows. Magnet (magnet 10
c) is taken out from the inside of the developing roller (developing roller 10d) to form a first conductive part, and a conductive part (fixed contact 29) or the second conductive part which is in sliding contact with the second conductive part is removed. A conductive component (sliding contact 30) or both that is in sliding contact with the first conductive portion is removed, and a replacement component (fixed contact 29 ′) for the conductive component (fixed contact 29, sliding contact 30) is removed. , After attaching the sliding contact 30 '),
The conductive component is replaced by disposing the magnet (magnet 10c) inside the developing roller (developing roller 10d) in the same manner as before the removal.

【００６４】以上説明したように、現像装置及びプロセ
スカートリッジにおいては、互いに摺動し摩耗してしま
う固定接点２９及び摺動接点３０を再生産時に交換する
ことができる。As described above, in the developing device and the process cartridge, the fixed contact 29 and the sliding contact 30 that slide and wear with each other can be replaced at the time of reproduction.

【００６５】［他の実施の形態］前述した実施の形態で
は、現像装置或は給電部品を単色画像を形成するプロセ
スカートリッジに適用した場合を例示したが、本発明に
係る現像装置或は給電部品は、現像手段を複数設け、複
数色の画像（２色画像、３色画像或はフルカラー等）を
形成するカートリッジにも好適に適用することができ
る。[Other Embodiments] In the above-described embodiment, the case where the developing device or the power supply component is applied to the process cartridge for forming a monochromatic image has been exemplified. However, the developing device or the power supply component according to the present invention is used. Can be suitably applied to a cartridge that is provided with a plurality of developing means and forms an image of a plurality of colors (a two-color image, a three-color image, or a full-color image).

【００６６】又、前記実施の形態で示したプロセスカー
トリッジは単色画像を形成する場合を例示したが、本発
明に係るプロセスカートリッジは現像手段を複数設け、
複数色の画像（２色画像、３色画像或ははフルカラー
等）を形成するカートリッジにも好適に適用することが
できる。Although the process cartridge described in the above embodiment has exemplified a case where a single color image is formed, the process cartridge according to the present invention is provided with a plurality of developing means.
The present invention can also be suitably applied to a cartridge that forms a plurality of color images (two-color image, three-color image, full color, or the like).

【００６７】更に、電子写真感光体としては、前記感光
ドラムに限定されることなく、例えば次のものが含まれ
る。先ず、感光ドラムとしては光導電体が用いられ、光
導電体としては例えばアモルファスシリコン、アモルフ
ァスセレン、酸化亜鉛、酸化チタン及び有機光導電体
（ＯＰＣ）等が含まれる。又、前記感光体を搭載する形
状としては、例えばドラム形状又はベルト状のものが用
いられており、例えばドラムタイプの感光体にあって
は、アルミ合金等のシリンダ上に光導電体を蒸着或は塗
工等を行ったものである。Further, the electrophotographic photosensitive member is not limited to the photosensitive drum, and includes, for example, the following. First, a photoconductor is used as the photosensitive drum. Examples of the photoconductor include amorphous silicon, amorphous selenium, zinc oxide, titanium oxide, and an organic photoconductor (OPC). As the shape on which the photoconductor is mounted, for example, a drum shape or a belt shape is used.For example, in the case of a drum type photoconductor, a photoconductor is deposited on a cylinder made of an aluminum alloy or the like. Is the one subjected to coating or the like.

【００６８】又、帯電手段の構成も前記実施の形態では
所謂接触帯電方式を用いたが、他の構成として従来から
用いられているタングステンワイヤーの三方周囲にアル
ミニウム等の金属シールドを施し、前記タングステンワ
イヤーに高電圧を印加することによって生じた正又は負
のイオンを感光ドラムの表面に移動させ、該感光ドラム
の表面を一様に帯電する構成を用いても良いことは当然
である。In the above-described embodiment, a so-called contact charging method is used for the charging means. Alternatively, a metal shield made of aluminum or the like may be provided around three sides of a conventionally used tungsten wire to form the tungsten charging means. Naturally, a configuration may be used in which positive or negative ions generated by applying a high voltage to the wire are moved to the surface of the photosensitive drum, and the surface of the photosensitive drum is uniformly charged.

【００６９】尚、前記帯電手段としては、前記ローラ型
以外にも、ブレード（帯電ブレード）、パッド型、ブロ
ック型、ロッド型、ワイヤー型等のものでも良い。又、
感光ドラムに残留するトナーのクリーニング方法として
も、ブレード、ファーブラシ、磁気ブラシ等を用いてク
リーニング手段を構成しても良い。The charging means may be a blade (charging blade), a pad type, a block type, a rod type, a wire type, or the like, in addition to the roller type. or,
As a method of cleaning the toner remaining on the photosensitive drum, a cleaning unit may be configured using a blade, a fur brush, a magnetic brush, or the like.

【００７０】又、前述したプロセスカートリッジとは、
例えば電子写真感光体と、少なくともプロセス手段の１
つを備えたものである。従って、そのプロセスカートリ
ッジの態様としては、前述した実施形態のもの以外に
も、例えば電子写真感光体と帯電手段とを一体的にカー
トリッジ化し、装置本体に着脱可能にするもの。電子写
真感光体と現像手段とを一体的にカートリッジ化し、装
置本体に着脱可能にするもの、電子写真感光体とクリー
ニング手段とを一体的にカートリッジ化し、装置本体に
着脱可能にするもの、更には電子写真感光体と、前記プ
ロセス手段の２つ以上のものを組み合わせて一体的にカ
ートリッジ化し、装置本体に着脱可能にするもの等があ
る。The process cartridge described above is
For example, an electrophotographic photosensitive member and at least one of the process means
It has one. Therefore, as an aspect of the process cartridge, in addition to the above-described embodiment, for example, an electrophotographic photosensitive member and a charging unit are integrally formed as a cartridge so as to be detachable from the apparatus main body. One in which the electrophotographic photosensitive member and the developing means are integrally formed into a cartridge and which can be attached to and detached from the apparatus main body, one in which the electrophotographic photosensitive member and the cleaning means are integrally formed into a cartridge so as to be detachable from the apparatus main body, An electrophotographic photosensitive member and two or more of the above-mentioned process means are combined to form a cartridge, which is made detachable from the apparatus main body.

【００７１】即ち、前述したプロセスカートリッジと
は、帯電手段、現像手段又はクリーニング手段と電子写
真感光体とを一体的にカートリッジ化し、このカートリ
ッジを画像形成装置本体に対して着脱可能とするもの、
或は更に帯電手段、現像手段、クリーニング手段の少な
くとも１つと電子写真感光体とを一体的にカートリッジ
化して画像形成装置本体に着脱可能とするものである。
更に、少なくとも現像手段と電子写真感光体とを一体的
にカートリッジ化して装置本体に着脱可能とするものを
言う。そして、このプロセスカートリッジは、使用者自
身が装置本体に着脱することができる。そこで、装置本
体のメンテナンスを使用者自身で行うことができる。That is, the above-described process cartridge is a cartridge in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive member are integrally formed into a cartridge, and this cartridge is detachable from the image forming apparatus main body.
Alternatively, at least one of the charging means, the developing means, and the cleaning means and the electrophotographic photosensitive member are integrally formed as a cartridge so that the cartridge can be detachably mounted on the image forming apparatus main body.
Further, it refers to a device in which at least the developing means and the electrophotographic photosensitive member are integrally formed into a cartridge so as to be detachable from the apparatus main body. The process cartridge can be attached to and detached from the apparatus main body by the user himself. Therefore, the maintenance of the apparatus main body can be performed by the user himself.

【００７２】更に、前述した実施の形態では、電子写真
画像形成装置としてレーザービームプリンタを例示した
が、本発明はこれに限定する必要はなく、例えば、電子
写真複写機、ファクシミリ装置、ワードプロセッサ等の
電子写真画像形成装置に使用することも可能である。Further, in the above-described embodiment, a laser beam printer is exemplified as the electrophotographic image forming apparatus. However, the present invention is not limited to this. For example, an electrophotographic copying machine, a facsimile apparatus, a word processor, etc. It can be used in an electrophotographic image forming apparatus.

【００７３】[0073]

【発明の効果】以上の説明で明らかなように、本発明に
よれば、摺動による摩耗のためにそのまま再使用するこ
とができない部品を交換することができるため、現像装
置及びプロセスカートリッジを再生産することができる
という効果が得られる。As is apparent from the above description, according to the present invention, parts which cannot be reused as they are due to wear due to sliding can be replaced. The effect of being able to produce is obtained.

[Brief description of the drawings]

【図１】現像ローラの接点構造を示す断面図である。FIG. 1 is a sectional view showing a contact structure of a developing roller.

【図２】磁石とこの磁石に組み付けられる円筒電極及び
固定接点の斜視図である。FIG. 2 is a perspective view of a magnet, a cylindrical electrode and a fixed contact attached to the magnet.

【図３】磁石とこの磁石に組み付けられる円筒電極及び
固定接点を組み付けた状態を示す斜視図である。FIG. 3 is a perspective view showing a state where a magnet, a cylindrical electrode and a fixed contact to be assembled to the magnet are assembled.

【図４】接点台と摺動接点を示す分解斜視図である。FIG. 4 is an exploded perspective view showing a contact base and sliding contacts.

【図５】接点台と摺動接点とを現像ローラヘ組み付ける
状態を示す斜視図である。FIG. 5 is a perspective view showing a state in which a contact base and a sliding contact are assembled to a developing roller.

【図６】接点台と摺動接点とを組み付けた現像ローラと
円筒電極と固定接点とを組み付けた磁石とを組み付ける
状態を示す斜視図である。FIG. 6 is a perspective view showing a state in which a developing roller in which a contact base and a sliding contact are assembled, and a magnet in which a cylindrical electrode and a fixed contact are assembled are assembled;

【図７】プロセスカートリッジを装着した電子写真画像
形成装置の断面図である。FIG. 7 is a cross-sectional view of an electrophotographic image forming apparatus equipped with a process cartridge.

【図８】プロセスカートリッジの断面図である。FIG. 8 is a sectional view of a process cartridge.

【図９】プロセスカートリッジの部分斜視図である。FIG. 9 is a partial perspective view of the process cartridge.

【図１０】固定接点の交換方法を説明する斜視図であ
る。FIG. 10 is a perspective view illustrating a method of replacing a fixed contact.

【図１１】摺動接点の交換方法を説明する斜視図であ
る。FIG. 11 is a perspective view illustrating a method of replacing a sliding contact.

【図１２】固定接点及び摺動接点の交換手順を説明する
図である。FIG. 12 is a diagram illustrating a procedure for replacing a fixed contact and a sliding contact.

[Explanation of symbols]

７感光ドラム（電子写真感光体）１０現像装置１０ｃ磁石１０ｃ１左側軸部１０ｃ２２凹部１０ｃ３Ｄカット１０ｃ３１円弧部分１０ｃ３２平坦部分１０ｄ現像ローラ１２トナー現像枠体２０ｂ１軸部材２４ｂ１支持穴２５固定電極部材２６装置側接点２８円筒電極２９ａ円板部３０摺動接点３０ａ円板部３０ｂ爪部３０ｃ摺動腕Ａ電子写真画像形成装置Ｂプロセスカートリッジ Reference Signs List 7 photosensitive drum (electrophotographic photosensitive member) 10 developing device 10c magnet 10c1 left shaft portion 10c22 concave portion 10c3 D cut 10c31 arc portion 10c32 flat portion 10d developing roller 12 toner developing frame body 20b1 shaft member 24b1 support hole 25 fixed electrode member 26 device side Contact 28 Cylindrical electrode 29a Disk 30 Sliding contact 30a Disk 30b Claw 30c Sliding arm A Electrophotographic image forming apparatus B Process cartridge

───────────────────────────────────────────────────── フロントページの続き (72)発明者野田晋弥東京都大田区下丸子３丁目30番２号キヤノン株式会社内 (72)発明者寺田一郎東京都大田区下丸子３丁目30番２号キヤノン株式会社内 (72)発明者笹子悦一東京都大田区下丸子３丁目30番２号キヤノン株式会社内 (72)発明者佐々木輝彦東京都大田区下丸子３丁目30番２号キヤノン株式会社内Ｆターム(参考） 2H031 AA05 AC01 AC09 AC11 AC13 AC17 AC30 AD03 BA03 BB01 EA03 FA00 FA05 2H071 AA03 BA05 BA13 BA16 BA19 BA20 BA27 BA29 DA08 DA34 EA00 ──────────────────────────────────────────────────続き Continued on the front page (72) Inventor Shinya Noda 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Ichiro Terada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inside (72) Inventor Etsuichi Sasako 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Teruhiko Sasaki 3-30-2, Shimomaruko, Ota-ku, Tokyo Canon Inc. F-term (Reference) 2H031 AA05 AC01 AC09 AC11 AC13 AC17 AC30 AD03 BA03 BB01 EA03 FA00 FA05 2H071 AA03 BA05 BA13 BA16 BA19 BA20 BA27 BA29 DA08 DA34 EA00

Claims

[Claims]

A developing roller for developing an electrostatic latent image formed on the electrophotographic photoreceptor using a developer; a magnet disposed inside the developing roller; A developing device having a first conductive portion provided along the longitudinal direction of the frame, a second conductive portion fixedly provided inside the developing roller, and a third conductive portion provided on the frame is provided. At the time of production, the magnet is taken out from the inside of the developing roller, and a conductive component which constitutes the first conductive portion attached to the magnet and is in sliding contact with the second conductive portion is removed. After attaching a replacement part to the magnet, the conductive part is replaced by disposing the magnet inside the developing roller in the same manner as before removing the magnet, thereby regenerating the developing device. Production method.

2. During reproduction, the magnet is removed from the inside of the developing roller, and the second conductive portion attached to the inside of the developing roller constitutes the second conductive portion and is in sliding contact with the first conductive portion. After the component is removed and the replacement component for the conductive component is attached to the inside of the developing roller, the conductive component is replaced by disposing the magnet inside the developing roller in the same manner as before removing the magnet. The method for reproducing a developing device according to claim 1.

3. At the time of reproduction, the magnet is taken out from the inside of the developing roller, and the conductive parts of the first conductive part and the second conductive part which are in sliding contact with each other are removed,
2. The developing device according to claim 1, wherein, after the replacement parts for both conductive parts are attached, the magnet is placed inside the developing roller in the same manner as before the magnet is taken out, thereby replacing both conductive parts. Reproduction method.

4. A conductive component forming the first conductive portion and being in sliding contact with the second conductive portion or a conductive component forming the second conductive portion and being in sliding contact with the first conductive portion. 4. A lubricant is applied to a sliding portion between the two conductive parts after replacing the parts or both and before disposing the magnet inside the developing roller. Method for developing a developing device.

5. A conductive component forming the first conductive portion and being in sliding contact with the second conductive portion, or a conductive component forming the second conductive portion and being in sliding contact with the first conductive portion. 4. The method according to claim 1, wherein a lubricant is previously applied to a sliding part of the part or both of the replacement parts.

6. A frame, a developing roller for developing an electrostatic latent image formed on an electrophotographic photoreceptor using a developer, a magnet disposed inside the developing roller, and a length of the frame. A first conductive portion provided along the direction, a second conductive portion fixedly provided inside the developing roller, and a reproduction device having a third conductive portion provided on the frame. After taking out the magnet from the inside of the developing roller, removing the disc-shaped conductive part attached to the magnet, and attaching a replacement part of the disc-shaped conductive part to the magnet, the magnet is placed inside the developing roller. And a method of reproducing the developing device, wherein the disk-shaped conductive parts are replaced by disposing them in the same manner as before the removal.

7. At the time of reproduction, the magnet is taken out from the inside of the developing roller, and constitutes the second conductive portion attached inside the developing roller, and is in sliding contact with the disc-shaped conductive component. After removing the conductive part and installing the replacement part of the conductive part inside the developing roller,
7. The method according to claim 6, wherein the conductive component is replaced by disposing the magnet inside the developing roller in the same manner as before the magnet is taken out.

8. At the time of reproduction, the magnet is taken out from the inside of the developing roller, the disc-shaped conductive component and the conductive component of the second conductive portion that are in sliding contact with each other are removed, and both conductive components are replaced. After attaching the parts, the magnet is placed inside the developing roller, just like before the removal,
7. The method according to claim 6, wherein both conductive parts are replaced by disposing the conductive parts.

9. The method according to claim 1, further comprising: replacing the conductive component constituting the disc-shaped conductive component or the second conductive portion and slidingly contacting the disc-shaped conductive component, or both of them, and then developing the magnet. 9. The method according to claim 6, wherein a lubricant is applied to a sliding portion between the two conductive parts before being disposed inside the roller.

10. Lubricants are previously applied to the sliding parts of the conductive parts constituting the disk-shaped conductive parts or the second conductive part and being in sliding contact with the disk-shaped conductive parts, or sliding parts of both replacement parts. 9. The method for remanufacturing a developing device according to claim 6, wherein the coating is applied.

11. A process cartridge detachable from an electrophotographic image forming apparatus main body, comprising: a frame; a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive member using a developer; A magnet disposed inside the developing roller, a first conductive portion provided along a longitudinal direction of the frame, a second conductive portion fixedly provided inside the developing roller, When remanufacturing a process cartridge including a developing device having a third conductive portion provided on a frame, the magnet is taken out of the inside of the developing roller to constitute the first conductive portion attached to the magnet, and After removing the conductive part that is in sliding contact with the second conductive part and attaching a replacement part for the conductive part to the magnet, the magnet is connected to the developing roller. A method for remanufacturing a process cartridge, wherein the conductive component is replaced by disposing the conductive component in the same manner as before removing the cartridge.

12. During reproduction, the magnet is removed from the inside of the developing roller, and the second conductive portion attached to the inside of the developing roller constitutes the conductive portion which is in sliding contact with the first conductive portion. After the component is removed and the replacement part for the conductive part is attached inside the developing roller, the conductive part is replaced by disposing the magnet inside the developing roller in the same manner as before removing the magnet. The method for re-producing a process cartridge according to claim 11.

13. At the time of reproduction, the magnet is taken out of the inside of the developing roller, and the conductive parts of the first conductive part and the second conductive part which are in sliding contact with each other are removed, and a replacement part for both conductive parts is provided. After attaching the magnet to the inside of the developing roller, as before removing the magnet,
12. The method according to claim 11, wherein both conductive parts are replaced by disposing.

14. A conductive component forming the first conductive portion and being in sliding contact with the second conductive portion, or a conductive component forming the second conductive portion and being in sliding contact with the first conductive portion. 12. The method according to claim 11, wherein a lubricant is applied to a sliding portion between the conductive components after replacing the component or both and before disposing the magnet inside the developing roller.
14. The method for remanufacturing a process cartridge according to 12 or 13.

15. A conductive component forming the first conductive portion and being in sliding contact with the second conductive portion, or a conductive component forming the second conductive portion and being in sliding contact with the first conductive portion. 14. A lubricant is applied in advance to a sliding part of the part or both replacement parts.
The method for reproducing the process cartridge described in the above.

16. A process cartridge detachable from a main body of an electrophotographic image forming apparatus, comprising: a frame; a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive member using a developer; A magnet disposed inside the developing roller, a first conductive portion provided along a longitudinal direction of the frame, a second conductive portion fixedly provided inside the developing roller, When remanufacturing a process cartridge including a developing device having a third conductive portion provided on a frame, the magnet is taken out of the inside of the developing roller, and the disc-shaped conductive component attached to the magnet is removed. After attaching the replacement part of the plate-shaped conductive part to the magnet, by arranging the magnet inside the developing roller in the same manner as before removing the magnet, A method for remanufacturing a process cartridge, comprising replacing the disc-shaped conductive component.

17. At the time of reproduction, the magnet is taken out of the inside of the developing roller, constitutes the second conductive portion attached inside the developing roller, and is in sliding contact with the disc-shaped conductive component. After the conductive component is removed and the replacement component for the conductive component is mounted inside the developing roller, the magnet is replaced inside the developing roller by disposing the magnet in the same manner as before removing the magnet. 17. The method for reproducing a process cartridge according to claim 16, wherein:

18. During reproduction, the magnet is taken out of the inside of the developing roller, the disc-shaped conductive part and the conductive part of the second conductive part which are in sliding contact with each other are removed, and both conductive parts are replaced. 17. The process cartridge re-production method according to claim 16, wherein, after the parts are mounted, both conductive parts are replaced by disposing the magnet inside the developing roller in the same manner as before removing the magnet.

19. The method according to claim 19, further comprising: replacing the conductive component forming the disc-shaped conductive component or the second conductive portion and slidingly contacting the disc-shaped conductive component, or both of the components and replacing the magnet with the developing component. 19. The process cartridge re-production method according to claim 16, wherein a lubricant is applied to a sliding portion between the two conductive parts before being disposed inside the roller.

20. Lubricant is previously applied to the sliding parts of the conductive parts constituting the disc-shaped conductive part or the second conductive part, which are in sliding contact with the disc-shaped conductive part, or the sliding parts of both replacement parts. 16. A coating method according to claim 16, wherein:
19. The method for remanufacturing a process cartridge according to 7 or 18.