JPH0943939A - Electrifying device, and process cartridge - Google Patents
Electrifying device, and process cartridgeInfo
- Publication number
- JPH0943939A JPH0943939A JP19754695A JP19754695A JPH0943939A JP H0943939 A JPH0943939 A JP H0943939A JP 19754695 A JP19754695 A JP 19754695A JP 19754695 A JP19754695 A JP 19754695A JP H0943939 A JPH0943939 A JP H0943939A
- Authority
- JP
- Japan
- Prior art keywords
- elastic member
- charging
- charging roller
- spring
- process cartridge
- 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.)
- Withdrawn
Links
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、感光体や誘電体の
ような被帯電体を帯電する帯電装置及びこの帯電装置を
用いたプロセスカートリッジに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for charging an object to be charged such as a photoconductor and a dielectric, and a process cartridge using the charging device.
【0002】[0002]
【背景技術】従来、例えば電子写真複写機等の画像形成
装置において、感光体等の被帯電体の表面を帯電するた
めの装置として、コロナ放電器がよく使用されている。
このものは、感光体に対向するワイヤ電極とワイヤ電極
を囲むシールド電極とを備え、これらに適宜な電圧を印
加することにより感光体を帯電する。2. Description of the Related Art Conventionally, in an image forming apparatus such as an electrophotographic copying machine, a corona discharger is often used as a device for charging the surface of a charged body such as a photoconductor.
This one is equipped with a wire electrode facing the photoconductor and a shield electrode surrounding the wire electrode, and charges the photoconductor by applying an appropriate voltage thereto.
【0003】しかしながら、このようなコロナ放電器を
用いた場合、(1)ワイヤ電極に印加する電圧が4kV
〜8kVといった高電圧になる、(2)ワイヤ電極から
シールド電極へほとんどの電流が流れるため帯電効率が
低い、(3)コロナ放電により、オゾンが発生する、
(4)放電ワイヤ電極の汚れにより、放電ムラが発生す
る、といった問題があった。However, when such a corona discharger is used, (1) the voltage applied to the wire electrode is 4 kV.
High voltage of ~ 8kV, (2) charging current is low because most of the current flows from the wire electrode to the shield electrode, and (3) ozone is generated by corona discharge.
(4) There is a problem that discharge unevenness occurs due to contamination of the discharge wire electrode.
【0004】このような問題を解決する帯電装置とし
て、帯電部材を被帯電体に直接接触させて被帯電体を帯
電するいわゆる接触帯電装置が知られている。As a charging device for solving such a problem, there is known a so-called contact charging device for charging a charging member by directly contacting a charging member with the charging member.
【0005】図6は、接触帯電装置122を用いた電子
写真装置の概略構成図である。被帯電体としての観光ド
ラム121は、矢印K1方向に回転し、帯電部材として
の帯電ローラ130は、その芯金(軸芯、回転軸)13
1の両端部がそれぞれ軸受135に軸受され、さらにそ
の両軸受135がそれぞればね136によって感光ドラ
ム121方向に付勢されることにより、感光ドラム12
1に加圧接触し、感光ドラム121との間に接触部(ニ
ップ部)nを形成している。電源138より接点13
7、ばね136、軸受135、芯金131を介して帯電
ローラ130にバイアス電圧を印加することにより感光
ドラム121の周囲の帯電が行われ、その帯電面に対す
る露光Lにより静電潜像が形成される。感光ドラム12
1上の静電潜像は現像装置123によりトナー像Taと
して顕像化され、そのトナー像Taが転写手段112に
よりシート材Pに対して像Tbとして転写される。画像
転写を受けたシート材Pは不図示の定着器により加熱さ
れてトナー像が永久定着される。転写後に感光ドラム1
21上に残留するトナーは、クリーニング装置125に
よって清掃除去され、感光ドラム121は繰り返して画
像形成に供される。FIG. 6 is a schematic diagram of an electrophotographic apparatus using the contact charging device 122. The sightseeing drum 121 as the member to be charged rotates in the direction of arrow K1, and the charging roller 130 as the charging member has its core metal (axial core, rotating shaft) 13
Both end portions of the photosensitive drum 12 are supported by bearings 135, and the bearings 135 are biased by the springs 136 toward the photosensitive drum 121.
1 under pressure to form a contact portion (nip portion) n with the photosensitive drum 121. Contact 13 from power supply 138
7, a bias voltage is applied to the charging roller 130 via the spring 136, the bearing 135, and the core metal 131 to charge the periphery of the photosensitive drum 121, and an electrostatic latent image is formed by exposure L to the charged surface. It Photosensitive drum 12
The electrostatic latent image on 1 is visualized as a toner image Ta by the developing device 123, and the toner image Ta is transferred to the sheet material P as an image Tb by the transfer unit 112. The sheet material P that has received the image transfer is heated by a fixing device (not shown) to permanently fix the toner image. Photosensitive drum 1 after transfer
The toner remaining on 21 is cleaned and removed by the cleaning device 125, and the photosensitive drum 121 is repeatedly used for image formation.
【0006】前記帯電ローラ130の芯金131の両端
部をそれぞれ軸受支持する軸受135はプラスチック材
料で形成され、その両端軸受135のうちの、帯電ロー
ラ130に給電する方の軸受135は成型時にプラスチ
ック材料中にカーボンファイバーを分散させることによ
り抵抗値が約103 〜104 Ω・cmになるように導電
性を持たせたものとしている。したがって、電源138
から、それぞれ導電性である、接点137、ばね13
6、上記の軸受135、芯金131を介して帯電ローラ
130にバイアス電圧が印加される。Bearings 135 for bearing-supporting both ends of the core 131 of the charging roller 130 are made of a plastic material. Of the bearings 135 at both ends, the bearing 135 for supplying power to the charging roller 130 is plastic at the time of molding. The carbon fiber is dispersed in the material so as to have conductivity so that the resistance value becomes about 10 3 to 10 4 Ω · cm. Therefore, the power source 138
From the contact point 137 and the spring 13 respectively
6. A bias voltage is applied to the charging roller 130 via the bearing 135 and the core 131 described above.
【0007】[0007]
【発明が解決しようとする課題】しかしながら、上記の
ような帯電装置において、前記導電性軸受け135はそ
の成型条件により前記プラスチック材料中のカーボンフ
ァイバーの分散状態がバラツキ、抵抗値が高くなり、絶
縁状体になることがあった。そのため、導通不良により
被帯電体としての感光体を所定の電位に帯電することが
できなくなり、画像不良が起きることがあった。However, in the charging device as described above, the conductive bearing 135 has a dispersion of carbon fibers in the plastic material due to the molding conditions thereof, the resistance value becomes high, and the insulating state is deteriorated. I had a physical problem. Therefore, due to poor continuity, the photosensitive member as a member to be charged cannot be charged to a predetermined potential, and an image defect may occur.
【0008】[0008]
【課題を解決するための手段】本発明は、被帯電体を帯
電する帯電ローラと、この帯電ローラを前記被帯電体に
押圧する弾性部材と、を有し、前記弾性部材を介して前
記帯電ローラに電圧を印加可能である帯電装置におい
て、前記弾性部材と前記帯電ローラの回転軸とを電気的
に接続するために前記弾性部材の一部と前記回転軸の周
面とを接触させることを特徴とする帯電装置を要旨とす
る。The present invention has a charging roller for charging a body to be charged, and an elastic member for pressing the charging roller against the body to be charged, and the charging is performed via the elastic member. In a charging device capable of applying a voltage to a roller, a part of the elastic member and a peripheral surface of the rotating shaft are brought into contact with each other in order to electrically connect the elastic member and the rotating shaft of the charging roller. The feature is a charging device.
【0009】また本発明は、前記帯電装置を用いたプロ
セスカートリッジを要旨とする。The present invention also provides a process cartridge using the charging device.
【0010】[0010]
【発明の実施の形態】図1は本発明に従う帯電装置を用
いた画像形成装置の概略構成図である。本例の画像形成
装置はプロセスユニット(プロセスカートリッジ)の着
脱式の電子写真プロセス利用のレーザービームプリンタ
である。図2はプロセスユニットの拡大横断面図であ
る。FIG. 1 is a schematic configuration diagram of an image forming apparatus using a charging device according to the present invention. The image forming apparatus of this example is a laser beam printer using a detachable electrophotographic process of a process unit (process cartridge). FIG. 2 is an enlarged cross-sectional view of the process unit.
【0011】1はプリンタの下部筺体、2はプリンタの
上部筺体である。上部筺体2はヒンジ支軸3を中心に下
部筺体1に対して実線示の閉じ込んだ状態と、2点鎖線
示の開き起こした状態とに開閉回動自由である。Reference numeral 1 is a lower housing of the printer, and 2 is an upper housing of the printer. The upper housing 2 is openable and closable about the hinge support shaft 3 in a closed state with respect to the lower housing 1 as shown by a solid line and in an opened and raised state as shown by a chain double-dashed line.
【0012】4はプロセスユニットであり、本実施例の
ものはドラム型感光体5と帯電装置6と現像器7とクリ
ーニング装置8の4つのプロセス機器を枠体9に組み付
けてプリンタ本体に対して着脱自在のユニットとしてあ
る。プロセスユニット4はプリンタの上部筺体2を下部
筺体1から開き起こしてその内側のユニット装着部10
に挿入して納め、該上部筺体2を下部筺体1に閉じ込む
ことによりプリンタ内部に所定に装着された状態にな
る。Reference numeral 4 denotes a process unit. In the present embodiment, four process devices including a drum type photoconductor 5, a charging device 6, a developing device 7 and a cleaning device 8 are mounted on a frame body 9 and attached to the printer body. It is a detachable unit. The process unit 4 raises the upper housing 2 of the printer from the lower housing 1 and raises the unit housing portion 10 inside thereof.
Then, the upper casing 2 is closed and the lower casing 1 is closed, so that the printer is mounted in a predetermined manner inside the printer.
【0013】プロセスユニット4は感光体5と、帯電装
置6及び現像器7及びクリーニング装置8の少なくとも
1つと、を備えていれば良い。The process unit 4 may include a photoconductor 5 and at least one of a charging device 6, a developing device 7 and a cleaning device 8.
【0014】11はレーザースキャナユニット、12は
シートカセット、13は給紙ローラ、14はレジストロ
ーラ対、15は転写ガイド、16は転写用帯電器、17
は搬送部材、18は定着器である。これ等はプリンタの
下部筺体1側に配設の機器である。11aはレーザー光
反射ミラー、19は排紙ローラ、20は排紙トレイであ
り、これ等はプリンタの上部筺体2側に配設の機器であ
る。Reference numeral 11 is a laser scanner unit, 12 is a sheet cassette, 13 is a paper feed roller, 14 is a registration roller pair, 15 is a transfer guide, 16 is a transfer charger, and 17 is a transfer charger.
Is a conveying member, and 18 is a fixing device. These are devices arranged on the lower housing 1 side of the printer. Reference numeral 11a is a laser beam reflection mirror, 19 is a paper discharge roller, 20 is a paper discharge tray, and these are devices arranged on the upper housing 2 side of the printer.
【0015】プリントスタート信号にもとずいて感光体
5が矢示の時計方向に所定の周速度(プロセススピー
ド)をもって回転駆動され、該回転感光体5の周面が該
感光体5に接触していてAC電圧とDC電圧とを重畳み
したバイアス電圧の印加された、帯電装置6の帯電ロー
ラ(帯電部材)30により一様均一に帯電処理される。In response to the print start signal, the photosensitive member 5 is rotationally driven in the clockwise direction indicated by the arrow at a predetermined peripheral speed (process speed), and the peripheral surface of the rotating photosensitive member 5 comes into contact with the photosensitive member 5. However, the charging roller (charging member) 30 of the charging device 6 to which the bias voltage in which the AC voltage and the DC voltage are superimposed is applied is uniformly and uniformly charged.
【0016】レーザースキャナユニット11からは目的
画像情報の時系列電気デジタル画素信号に対応して変調
されたレーザー光Lが出力され、それがミラー11aに
より反射されてプロセスユニット4の枠体9の露光窓部
9aからユニット4内へ入光して回転感光体5の帯電処
理面に当り、回転感光体5面が該レーザー光Lで走査露
光される。これにより感光体5面には目的画像情報が対
応した静電潜像が形成されていく。その形成潜像は現像
器7の現像スリーブ7a上に現像ブレード7bにより層
厚規制されて塗布されたトナー粉で現像される。The laser scanner unit 11 outputs a laser beam L which is modulated in accordance with the time-series electric digital pixel signal of the target image information, which is reflected by the mirror 11a to expose the frame 9 of the process unit 4. Light enters the unit 4 through the window 9a, hits the charging surface of the rotating photoconductor 5, and the surface of the rotating photoconductor 5 is scanned and exposed with the laser beam L. As a result, an electrostatic latent image corresponding to the target image information is formed on the surface of the photoconductor 5. The formed latent image is developed with the toner powder applied on the developing sleeve 7a of the developing device 7 with the layer thickness regulated by the developing blade 7b.
【0017】一方、シートカセット12内から給紙ロー
ラ13により転写材Pが1枚宛繰り出されて、レジスト
ローラ対14によりレーザーの出射するタイミングと合
わせて転写ガイド15を通して感光体5と転写用帯電器
16との間の転写位置へタイミング給送される。これに
より感光体5側の形成トナー粉像が転写材P面に順次に
転写されていく。On the other hand, one sheet of the transfer material P is delivered from the sheet cassette 12 by the paper feed roller 13, and the photoconductor 5 and the transfer charge are transferred through the transfer guide 15 at the timing when the laser is emitted by the registration roller pair 14. The sheet is time-fed to the transfer position with the container 16. As a result, the toner powder image formed on the side of the photoconductor 5 is sequentially transferred to the surface of the transfer material P.
【0018】トナー粉像転写を受けた転写材Pは感光体
5面から分離されて搬送部材17で定着器18へ搬送さ
れて定着ローラ18aと加圧ローラ18bのニップ部を
通ることでトナー粉像の定着処理を受け、排紙ローラ1
9により排紙トレイ20へ排出される。転写後の感光体
5はクリーニング装置8のブレード8aにより残留トナ
ーの除去を受けて繰り返して帯電からはじまる作像に供
される。The transfer material P having undergone the toner powder image transfer is separated from the surface of the photoconductor 5 and is conveyed to the fixing device 18 by the conveying member 17 and passes through the nip portion between the fixing roller 18a and the pressure roller 18b to form the toner powder. After the image fixing process, the paper discharge roller 1
The sheet 9 is discharged to the sheet discharge tray 20. After transfer, the photoconductor 5 is subjected to residual toner removal by the blade 8a of the cleaning device 8 and is repeatedly subjected to image formation starting from charging.
【0019】図2において、9cはプロセスユニット4
の感光体面露出開口部9bに対する開閉カバーであり、
プロセスユニット4がプリンタから取り出されていると
きや上部筺体2が開かれたときは閉じ位置へ移動して感
光体露出面を隠蔽防護する役目をする。In FIG. 2, 9c is a process unit 4
Is an opening / closing cover for the photoconductor surface exposure opening 9b of
When the process unit 4 is taken out of the printer or when the upper housing 2 is opened, it moves to the closed position to conceal and protect the exposed surface of the photoconductor.
【0020】帯電部材としての帯電ローラ30の構成の
好ましい例を図3に示した。図3は帯電ローラ30の層
構成模型図である。SUSのような導電性芯金31の上
に導電性の弾性層32があり、その上に高抵抗の弾性層
33、更に表面に保護膜34を有する。導電性弾性層3
2はEPDM中にカーボンを分散したもので構成され、
芯金31に供給されるバイアス電圧を導く作用をなす。
高抵抗の弾性層33はウレンタンゴム等で構成され、微
量の導電性微粉末(例えば、カーボン)を含有するもの
が一例として挙げられ、感光体5のピンホールなど導電
度の高い帯電ローラ30が相対した場合でも、感光体5
へのリーク電流を制限してバイアス電圧の急降下を防ぐ
作用をなす。表面の保護膜34はN−メチルメトキシ化
ナイロンで構成され、導電性弾性層32や、高抵抗弾性
層33の組成物質が、感光体5に触れて感光体1の表面
を変質させることが無いように、保護作用をなす。A preferred example of the structure of the charging roller 30 as a charging member is shown in FIG. FIG. 3 is a schematic diagram of the layer structure of the charging roller 30. A conductive elastic layer 32 is provided on a conductive core metal 31 such as SUS, a high resistance elastic layer 33 is provided thereon, and a protective film 34 is provided on the surface. Conductive elastic layer 3
2 is composed of EPDM in which carbon is dispersed,
It serves to guide the bias voltage supplied to the core metal 31.
The high resistance elastic layer 33 is made of, for example, urethane rubber and contains a minute amount of conductive fine powder (for example, carbon). As an example, the charging roller 30 having high conductivity such as a pinhole of the photoconductor 5 is used. Even if you do,
The leak current is limited to prevent the bias voltage from dropping sharply. The surface protective film 34 is made of N-methylmethoxylated nylon, and the composition material of the conductive elastic layer 32 and the high resistance elastic layer 33 does not touch the photoconductor 5 to alter the surface of the photoconductor 1. As such, it acts as a protection.
【0021】図4は帯電ローラ30に対する給電部の構
成を示している。感光体5は図には省略したがその両端
側をプロセスユニット枠体(9)の側板間に回転自由に
軸受け保持させてある。Gは感光体5の一端側に同心一
体に設けたドラムギアである。該ギアGはプロセスユニ
ット4がプリンタ本体に所定に装着されるとプリンタ本
体側の駆動ギア(不図示)と噛合した状態になり、その
駆動ギアの回転力がギアGを介して感光体5に伝達され
感光体5の回転駆動がなされる。FIG. 4 shows the structure of the power feeding portion for the charging roller 30. Although not shown in the drawing, the photoconductor 5 is rotatably supported by bearings on both end sides between the side plates of the process unit frame (9). G is a drum gear that is provided concentrically and integrally on one end side of the photoconductor 5. When the process unit 4 is attached to the printer main body in a predetermined manner, the gear G comes into a state of meshing with a drive gear (not shown) on the printer main body side, and the rotational force of the drive gear is applied to the photoconductor 5 via the gear G. The photoconductor 5 is transmitted and rotationally driven.
【0022】帯電部材としての帯電ローラ30は回転軸
である芯金31の両端部を夫々絶縁性の軸受け35に軸
受させ、その両軸受け35を該軸受けと不図示のプロセ
スユニット枠体(9)間に縮設したSUSのような導電
性の弾性部材としてのコイル状のバネ36により感光体
5方向に偏奇させることで、帯電ローラ30を感光体5
に対して所定に加圧接触させてある。帯電ローラ30は
感光体5の回転に従動して回転する。In the charging roller 30 as a charging member, both ends of a cored bar 31 which is a rotating shaft are supported by insulating bearings 35, and both bearings 35 and the process unit frame (not shown) (9). By biasing the charging roller 30 toward the photoconductor 5 by a coil-shaped spring 36 as a conductive elastic member such as SUS, which is contracted between the charging roller 30 and the photoconductor 5.
Is contacted with a predetermined pressure. The charging roller 30 rotates following the rotation of the photoconductor 5.
【0023】帯電ローラ30の軸方向において芯金30
の両端面は、プロセスユニット4の枠体と一体成形され
たスラストストッパ42(片側だけを図示)と当接し、
帯電ローラ30は、軸方向の移動が規制される。スラス
トストッパ42は、プロセスユニット4の枠体とともに
絶縁性樹脂で形成される。A core metal 30 in the axial direction of the charging roller 30.
Both end faces of the contact with the thrust stopper 42 (only one side is shown) integrally formed with the frame of the process unit 4,
The movement of the charging roller 30 in the axial direction is restricted. The thrust stopper 42 is formed of an insulating resin together with the frame of the process unit 4.
【0024】芯金31の軸周面31bには、ばね36か
ら延び出て来ているばね端面36aが加圧接触してい
る。電極40の基端部は、カートリッジ本体20に熱カ
シメ等により固定支持されてある。プロセスカートリッ
ジ4がプリンタ本体の所定位置に装着されるとプロセス
カートリッジ4側の受電端子41aとプリンタ本体側の
給電端子41bとが接触してプリンタ本体側の電源38
とプロセスカートリッジ4側の電極40とが電気的に連
結される。A spring end surface 36a extending from the spring 36 is in pressure contact with the shaft peripheral surface 31b of the cored bar 31. The base end portion of the electrode 40 is fixedly supported on the cartridge body 20 by thermal caulking or the like. When the process cartridge 4 is mounted at a predetermined position on the printer body, the power receiving terminal 41a on the process cartridge 4 side and the power feeding terminal 41b on the printer body side come into contact with each other and the power source 38 on the printer body side
And the electrode 40 on the process cartridge 4 side are electrically connected.
【0025】また、図4の給電部の構成において、電極
40の基端部をばね36の上端側へ折り曲げ延長してカ
ートリッジ本体20に加圧固定し、その電極40の折り
曲げ延長部にばね36の上端部を接触させて受け止め
る。なお、ばね36は導電性であり、軸受35は絶縁性
としてあり、これにより、電極40と芯金31とは、ば
ね36を介して、電気的に連結されている。Further, in the structure of the power feeding portion of FIG. 4, the base end portion of the electrode 40 is bent and extended to the upper end side of the spring 36 and fixed under pressure to the cartridge main body 20, and the spring 36 is attached to the bent extension portion of the electrode 40. Make contact with the upper end of and receive. The spring 36 is electrically conductive, and the bearing 35 is electrically insulative, so that the electrode 40 and the cored bar 31 are electrically connected via the spring 36.
【0026】このように電源38のバイアス電圧を電極
40と導電性のばね36の一部分を介して、帯電ローラ
ー30の導電性芯金31の軸周面31bより直接給電す
ることにより、電源38から帯電ローラ30へ至る給電
路の導通性が向上して導通不良に起因する感光体5の帯
電処理不良、該帯電処理不良による画像不良の発生が防
止され、低コスト化が達成できる。帯電ローラ30への
給電は芯金31より直接行うため、軸受け35は導電性
を有する必要がない。そのため、軸受け35のプラスチ
ック材料中にカーボンを含有させる必要がないため、軸
受けのコストが安くなるというメリットもある。As described above, the bias voltage of the power source 38 is directly supplied from the shaft peripheral surface 31b of the conductive cored bar 31 of the charging roller 30 via the electrode 40 and a part of the conductive spring 36, so that the power source 38 is supplied. The conductivity of the power supply path to the charging roller 30 is improved, the charging process failure of the photoconductor 5 due to the failure of the conduction and the image failure due to the failure of the charging process are prevented, and the cost can be reduced. The bearing 35 does not need to be electrically conductive because the core roller 31 supplies power to the charging roller 30 directly. Therefore, since it is not necessary to include carbon in the plastic material of the bearing 35, there is also an advantage that the cost of the bearing can be reduced.
【0027】なお、図5は、本発明の帯電装置の端部付
近の主要部の斜視図である。すなわち帯電ローラー30
を感光ドラム5に向けて付勢するばね36から伸び出た
ばね端面36aを帯電ローラー30の芯金31の軸周面
31bに加圧接触させたものである。また、本例では芯
金31、ばね36とも共通の材料としてSUSを用いて
いる。このように同じ材料を接触させるとその接触部で
酸化膜が生じなくなる。FIG. 5 is a perspective view of the main part near the end of the charging device of the present invention. That is, the charging roller 30
A spring end surface 36a extending from a spring 36 for urging the roller toward the photosensitive drum 5 is brought into pressure contact with the shaft peripheral surface 31b of the core metal 31 of the charging roller 30. Further, in this example, SUS is used as a common material for the core metal 31 and the spring 36. When the same materials are brought into contact with each other in this way, no oxide film is formed at the contact portion.
【0028】一方、図10は、上記の方法とは別な方法
でバイアス電圧を印加する方法を示したものである。す
なわち、電源138のバイアス電圧がリン青銅板の電極
140に印加され、該電極140の先端部140aは、
帯電ローラ130のSUSからなる芯金131の端面1
31aに接触しているので、帯電ローラ130に対する
給電が直接できるようにしたものである。なお帯電ロー
ラ130はばね136が軸受135を押圧することによ
って感光体121に押圧される。On the other hand, FIG. 10 shows a method of applying a bias voltage different from the above method. That is, the bias voltage of the power source 138 is applied to the electrode 140 of the phosphor bronze plate, and the tip portion 140a of the electrode 140 is
End surface 1 of core metal 131 made of SUS of charging roller 130
Since it is in contact with 31a, power supply to the charging roller 130 can be directly performed. The charging roller 130 is pressed against the photoconductor 121 by the spring 136 pressing the bearing 135.
【0029】図10の場合には、帯電ローラ130が軸
方向に移動したとき芯金131が先端部140aと接触
不良を起こしたり、芯金131が先端部140aに変形
を与えたりする恐れがある。またリン青銅板の電極14
0とSUSの芯金131との間に絶縁酸化膜が発生し、
導通不良が生じることがある。In the case of FIG. 10, when the charging roller 130 moves in the axial direction, the core bar 131 may cause a contact failure with the tip end part 140a, or the core bar 131 may deform the tip end part 140a. . In addition, the phosphor bronze plate electrode 14
0 and an SUS core metal 131 generate an insulating oxide film,
Poor conduction may occur.
【0030】しかしながら、本例のようにばね36の一
部36aから芯金31の周面31bに導通をとるように
すれば芯金31が軸方向に移動したとしても導通不良が
生じにくくなる。また、電極40と芯金31とを同じ材
料としたので両者の間に絶縁酸化膜が生じにくい。However, if the part 36a of the spring 36 is electrically connected to the peripheral surface 31b of the cored bar 31 as in the present embodiment, even if the cored bar 31 is moved in the axial direction, a conduction failure is less likely to occur. Further, since the electrode 40 and the core metal 31 are made of the same material, an insulating oxide film is unlikely to be formed between them.
【0031】次に帯電装置の給電方法の第2の実施形態
について図7〜図9を参照して説明する。Next, a second embodiment of the power feeding method for the charging device will be described with reference to FIGS.
【0032】図7は帯電ローラ30に対する給電部の構
成を示している。感光体5は図には省略したがその両端
側をプロセスユニット枠体(9)の側板間に回転自由に
軸受け保持させてある。Gは感光体5の一端側に同心一
体に設けたドラムギアである。該ギアGはプロセスユニ
ット4がプリンタ本体に所定に装着されるとプリンタ本
体側の駆動ギア(不図示)と噛合した状態になり、その
駆動ギアの回転力がギアGを介して感光体5に伝達され
感光体5の回転駆動がなされる。FIG. 7 shows the structure of the power feeding portion for the charging roller 30. Although not shown in the drawing, the photoconductor 5 is rotatably supported by bearings on both end sides between the side plates of the process unit frame (9). G is a drum gear that is provided concentrically and integrally on one end side of the photoconductor 5. When the process unit 4 is attached to the printer main body in a predetermined manner, the gear G comes into a state of meshing with a drive gear (not shown) on the printer main body side, and the rotational force of the drive gear is applied to the photoconductor 5 via the gear G. The photoconductor 5 is transmitted and rotationally driven.
【0033】帯電部材としての帯電ローラ30は芯金3
1の両端部を夫々絶縁性軸受け35に軸受させ、その両
軸受け35を該軸受けと不図示のプロセスユニット枠体
(9)間に縮設した導電性バネ36により感光体5方向
に偏奇させることで、帯電ローラ30を感光体5に対し
て所定に加圧接触させてある。帯電ローラ30は感光体
5の回転に従動して回転する。ローラ30の軸方向にお
いて芯金30の両端の端面は、プロセスユニット4の枠
体と一体成形された絶縁性樹脂のストッパ42(片側の
み図示)と当接し、ローラ30aの軸方向の移動が規制
される。The charging roller 30 serving as a charging member has a core metal 3
Both end portions of 1 are supported by insulating bearings 35, and both bearings 35 are biased toward the photoconductor 5 by a conductive spring 36 provided between the bearings and a process unit frame (9) (not shown). Then, the charging roller 30 is brought into pressure contact with the photoconductor 5 in a predetermined manner. The charging roller 30 rotates following the rotation of the photoconductor 5. The end faces of both ends of the cored bar 30 in the axial direction of the roller 30 come into contact with an insulating resin stopper 42 (only one side is shown) integrally formed with the frame of the process unit 4 to restrict the axial movement of the roller 30a. To be done.
【0034】図7に示すように芯金31の軸周面31b
には、ばね36から延び出て来ているばね端面36aが
加圧接触している。電極40の基端部は、カートリッジ
本体20に熱カシメ等により固定支持されてある。プロ
セスカートリッジ4がプリンタ本体の所定位置に装着さ
れるとプロセスカートリッジ4側の受電端子41aとプ
リンタ本体側の給電端子41bとが接触してプリンタ本
体側の電源38とプロセスカートリッジ4側の電極40
とが電気的に連結される。芯金と電極40は、ばね36
(ばね端部36a)を介して電気的に接続されている。As shown in FIG. 7, the shaft peripheral surface 31b of the cored bar 31 is shown.
The spring end surface 36a extending from the spring 36 is in pressure contact with the. The base end portion of the electrode 40 is fixedly supported on the cartridge body 20 by thermal caulking or the like. When the process cartridge 4 is mounted at a predetermined position on the printer body, the power receiving terminal 41a on the process cartridge 4 side and the power feeding terminal 41b on the printer body side contact each other, and the power source 38 on the printer body side and the electrode 40 on the process cartridge 4 side.
And are electrically connected. The core metal and the electrode 40 are connected to the spring 36.
It is electrically connected via the (spring end portion 36a).
【0035】このように電源38のバイアス電圧を電極
40と導電性のばね36の一部分を介して、帯電ローラ
ー30の芯金31の軸周面31bより直接給電すること
により、電源38から帯電ローラ30へ至る給電路の導
通性が向上して導通不良に起因する感光体5の帯電処理
不良、該帯電処理不良による画像不良の発生が防止され
る。As described above, the bias voltage of the power source 38 is directly supplied from the shaft peripheral surface 31b of the core metal 31 of the charging roller 30 via the electrode 40 and a part of the conductive spring 36. The conductivity of the power supply path to 30 is improved, and the defective charging process of the photoconductor 5 due to the defective conductivity and the image defect due to the defective charging process are prevented.
【0036】図8は、図7の帯電装置の端部付近の斜視
図、図9は絶縁性軸受35に導電性ばね36の位置規制
を兼ねさせた例の詳細図である。すなわち、帯電ローラ
ー30を感光ドラム21方向に付勢するばね36から延
び出たばね端面36aを帯電ローラーの芯金31の軸周
面31bに加圧接触させる際、導電軸受35にある穴3
5bを通って加圧接触していることがわかる。このよう
な構成をとり、ばね端面36aの位置規制を行い、か
つ、帯電ローラー30の芯金31の軸周面31bに直接
給電することにより、電源38から帯電ローラへ至る給
電路の導通性が向上、並びに安定し、導通不良に起因す
る感光体5の帯電処理不良、該帯電処理不良による画像
不良の発生が防止される。FIG. 8 is a perspective view of the vicinity of the end of the charging device of FIG. 7, and FIG. 9 is a detailed view of an example in which the insulating bearing 35 also serves as the position restriction of the conductive spring 36. That is, when the spring end surface 36a extending from the spring 36 that biases the charging roller 30 toward the photosensitive drum 21 is brought into pressure contact with the shaft peripheral surface 31b of the core metal 31 of the charging roller, the hole 3 in the conductive bearing 35 is formed.
It can be seen that pressure contact is made through 5b. With such a configuration, the position of the spring end surface 36a is regulated, and the shaft peripheral surface 31b of the cored bar 31 of the charging roller 30 is directly fed with power, so that the power supply path from the power source 38 to the charging roller is electrically connected. It is improved and stable, and it is possible to prevent defective charging processing of the photoconductor 5 due to defective conduction and occurrence of image failure due to the defective charging processing.
【0037】また、帯電ローラー30への給電はばね3
6を介して、芯金31より直接行うため、軸受け35は
導電性を有する必要がない。そのため、軸受け35のプ
ラスチック材料中にカーボンを含有させる必要がないた
め、軸受けのコストが安くなるというメリットもある。Further, the power is supplied to the charging roller 30 by the spring 3.
The bearing 35 does not need to be electrically conductive because it is directly carried out from the cored bar 31 via 6. Therefore, since it is not necessary to include carbon in the plastic material of the bearing 35, there is also an advantage that the cost of the bearing can be reduced.
【0038】次に、帯電装置の第3実施形態を示す。本
実施形態は図4、図5に示す軸受け35を導電性とした
ものである。軸受以外の構成は図4、図5に示す実施形
態と同じであるので説明を省略する。Next, a third embodiment of the charging device will be shown. In this embodiment, the bearing 35 shown in FIGS. 4 and 5 is made conductive. Since the configuration other than the bearing is the same as that of the embodiment shown in FIGS. 4 and 5, the description thereof will be omitted.
【0039】軸受35は導電性であるので電極40と芯
金31とはばね36、軸受35を介して電気的に接続さ
れる。Since the bearing 35 is electrically conductive, the electrode 40 and the cored bar 31 are electrically connected via the spring 36 and the bearing 35.
【0040】この構成により電源38から帯電ローラ3
0への給電経路は、順に、電極40の基端部、導電性ば
ね36、導電性軸受35を介する第1の給電経路と、電
極40の基端部、導電性ばね36から延び出て来ている
ばね端面36aから帯電ローラー30の芯金31の軸周
面31bに直接給電する第2の給電経路の2通りとな
る。With this configuration, the power supply 38 is connected to the charging roller 3
The power feeding path to 0 sequentially extends from the base end of the electrode 40, the conductive spring 36, the first power feeding path via the conductive bearing 35, and the base end of the electrode 40 and the conductive spring 36. There are two types of second power feeding paths for directly feeding power from the spring end surface 36a to the shaft peripheral surface 31b of the core metal 31 of the charging roller 30.
【0041】このため、仮に、導電性軸受35の成型条
件により抵抗値が高くなり帯電ローラ30への給電が困
難になっても、上述後者の第2の給電経路により、感光
ドラム21を支障なく帯電することができ、帯電性能・
信頼性がより向上・安定する。Therefore, even if the resistance value becomes high due to the molding conditions of the conductive bearing 35 and it becomes difficult to supply power to the charging roller 30, the latter second power supply path described above does not hinder the photosensitive drum 21. Can be charged, charging performance
Reliability is further improved and stabilized.
【0042】また、導電性ばね36を伸ばしたばね端面
36aを帯電ローラー30の芯金31の軸周面31bに
直接給電する構成を取ったことにより、従来のリン青銅
板のような電極140の尖端部140aを帯電ローラ1
30のSUSの芯金131の端面131aに接触させる
構成に対して長期保管等による絶縁酸化膜発生に伴う導
通不良の発生、部品組込時の電極変形を防止する事も可
能となった。Further, since the spring end surface 36a obtained by extending the conductive spring 36 is directly fed to the shaft peripheral surface 31b of the core metal 31 of the charging roller 30, the tip of the electrode 140 such as the conventional phosphor bronze plate is provided. The portion 140a is the charging roller 1
With respect to the structure in which the end surface 131a of the SUS core bar 131 of 30 is contacted, it is possible to prevent the occurrence of conduction failure due to the generation of an insulating oxide film due to long-term storage or the like, and the electrode deformation during the assembly of parts.
【0043】また、本実施形態によれば、上記の従来の
構成に比べて、低コストとなり、帯電ローラの軸方向の
移動もなくすことができた。Further, according to this embodiment, the cost can be reduced as compared with the above-mentioned conventional structure, and the movement of the charging roller in the axial direction can be eliminated.
【0044】次に帯電装置の第4実施形態を示す。本実
施形態は、図7〜図9に示す軸受35を導電性としたも
のである。軸受以外の構成は図7〜図9に示す実施形態
と同じであるので説明を省略する。Next, a fourth embodiment of the charging device will be shown. In this embodiment, the bearing 35 shown in FIGS. 7 to 9 is made conductive. Since the configuration other than the bearing is the same as that of the embodiment shown in FIGS. 7 to 9, description thereof will be omitted.
【0045】軸受35は導電性であるので電極40と芯
金31とは、ばね36、軸受35を介して電気的に接続
される。Since the bearing 35 is conductive, the electrode 40 and the cored bar 31 are electrically connected via the spring 36 and the bearing 35.
【0046】したがって、この構成により電源38から
帯電ローラ30への給電経路は、順に、電極40の基端
部、導電性ばね36、導電性軸受35を介する第1の給
電経路と、電極40の基端部、導電性ばね36から延び
出て来ているばね端面36aから帯電ローラー30の芯
金31の軸周面31bに直接給電する第2の給電経路の
2通りとなる。Therefore, with this configuration, the power supply path from the power source 38 to the charging roller 30 is, in order, the first power supply path via the base end portion of the electrode 40, the conductive spring 36, and the conductive bearing 35, and the electrode 40. There are two types of second power feeding paths in which power is directly fed from the base end portion, the spring end surface 36a extending from the conductive spring 36, to the shaft peripheral surface 31b of the core metal 31 of the charging roller 30.
【0047】このため、仮に、導電性軸受35の成型条
件により抵抗値が高くなり帯電ローラ30への給電が困
難にあっても、上述後者の第2の給電経路により、感光
ドラム21を支障なく帯電することができ、帯電性能・
信頼性がより向上・安定する。Therefore, even if the resistance value becomes high due to the molding conditions of the conductive bearing 35 and it is difficult to supply power to the charging roller 30, the latter second power supply path described above does not hinder the photosensitive drum 21. Can be charged, charging performance
Reliability is further improved and stabilized.
【0048】また、導電性ばね36を伸ばしたばね端面
36aを帯電ローラ30の芯金31の軸周面31bに直
接給電する構成を取ったことにより、従来のような電極
140の先端部140aを帯電ローラ130の芯金13
1の端面131aに接触させる構成に対して長期保管等
による絶縁酸化膜発生に伴う導通不良の発生、部品組込
時の電極変形を防止する事も可能となった。Further, the spring end surface 36a obtained by extending the conductive spring 36 is directly fed to the shaft peripheral surface 31b of the core metal 31 of the charging roller 30, so that the tip portion 140a of the electrode 140 is charged as in the conventional case. The core metal 13 of the roller 130
With respect to the structure in which the first end surface 131a is contacted, it is possible to prevent the occurrence of conduction failure due to the generation of an insulating oxide film due to long-term storage or the like, and the electrode deformation at the time of assembling components.
【0049】また、本実施形態によれば、上記の従来の
構成に比べて低コストとなり、帯電ローラの軸方向の移
動もなくすことができた。Further, according to this embodiment, the cost is lower than that of the above-mentioned conventional structure, and the movement of the charging roller in the axial direction can be eliminated.
【0050】図9、図10のように、帯電ローラー30
を感光ドラム21方向に付勢するばね36から延び出た
ばね端面36aを帯電ローラの芯金31の軸周面31b
に加圧接触させる際、導電軸受35にある穴35bを通
って加圧接触している。このような構成をとり、ばね端
面36aの位置規制を行う事により、前述の複数給電経
路を持たせることによる帯電性能、信頼性の向上と安定
性の向上を達成できるばかりでなく、他部品組込み時の
電極変形を防止し、帯電ローラの軸方向の移動防止、低
コスト化の達成を図る事が可能となった。As shown in FIGS. 9 and 10, the charging roller 30
A spring end surface 36a extending from a spring 36 for urging the charging roller toward the photosensitive drum 21 and a shaft peripheral surface 31b of the core metal 31 of the charging roller.
When making pressure contact with, the pressure contact is made through the hole 35b in the conductive bearing 35. By adopting such a configuration and restricting the position of the spring end surface 36a, not only the charging performance, the reliability and the stability can be improved by having the above-described multiple power feeding paths, but also other components can be incorporated. It has become possible to prevent electrode deformation at the time, prevent axial movement of the charging roller, and achieve cost reduction.
【0051】また、実施形態3、4によれば2通りの給
電経路を設けたことにより、一方の給電経路からの給電
が正常に行われない場合であっても、他方の給電経路か
ら確実に給電が行われ、全体として、帯電部材を好適に
給電し、所定帯電量を確保出来る。Further, according to the third and fourth embodiments, since the two power supply paths are provided, even when the power supply from one power supply path is not normally performed, the other power supply path is surely provided. Power is supplied, and as a whole, the charging member is preferably supplied with power and a predetermined charge amount can be secured.
【0052】[0052]
【発明の効果】以上のように本発明によれば、電源から
帯電ローラへ至る給電路の導通不良に起因する被帯電体
の帯電処理不良の発生を防止することができる。従って
該帯電装置を用いた画像形成装置にあっては、被帯電体
としての感光体の上記の帯電処理不良による画像不良の
発生が防止される。As described above, according to the present invention, it is possible to prevent the occurrence of the defective charging process of the member to be charged due to the defective conduction of the power feeding path from the power source to the charging roller. Therefore, in the image forming apparatus using the charging device, it is possible to prevent the occurrence of the image defect due to the above-mentioned defective charging process of the photoconductor as the member to be charged.
【図1】画像形成装置としてのレーザービームプリンタ
の概要を示す縦断面図。FIG. 1 is a vertical cross-sectional view showing an outline of a laser beam printer as an image forming apparatus.
【図2】プロセスカートリッジの拡大縦断面図。FIG. 2 is an enlarged vertical sectional view of a process cartridge.
【図3】帯電ローラの縦断面図。FIG. 3 is a vertical cross-sectional view of a charging roller.
【図4】実施形態1、3の給電部の構成を示す正面図。FIG. 4 is a front view showing a configuration of a power feeding unit according to the first and third embodiments.
【図5】図4の給電部の斜視図。5 is a perspective view of the power feeding unit of FIG.
【図6】従来の画像形成装置を示す縦断面図。FIG. 6 is a vertical sectional view showing a conventional image forming apparatus.
【図7】実施形態2、4の給電部を示す正面図。FIG. 7 is a front view showing a power feeding unit according to the second and fourth embodiments.
【図8】図7の給電部の斜視図。FIG. 8 is a perspective view of the power feeding unit of FIG.
【図9】図7の給電部の構成を示す詳細図。9 is a detailed view showing the configuration of the power supply unit of FIG.
【図10】従来の給電部の正面図。FIG. 10 is a front view of a conventional power feeding unit.
4 プロセスカートリッジ 5 被帯電体(感光ドラム) 6 帯電装置 7 現像手段(現像装置) 8 クリーニング手段(クリーニング装置) 30 帯電部材(帯電ローラ) 31 芯金 35 軸受 36 ばね(弾性部材) 38 電源 40 電極 4 process cartridge 5 charged body (photosensitive drum) 6 charging device 7 developing means (developing device) 8 cleaning means (cleaning device) 30 charging member (charging roller) 31 core metal 35 bearing 36 spring (elastic member) 38 power supply 40 electrode
フロントページの続き (72)発明者 池本 功 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 新一 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) Inventor Isao Ikemoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shinichi Sasaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. Within
Claims (12)
帯電ローラを前記被帯電体に押圧する弾性部材と、を有
し、前記弾性部材を介して前記帯電ローラに電圧を印加
可能である帯電装置において、 前記弾性部材と前記帯電ローラの回転軸とを電気的に接
続するために前記弾性部材の一部と前記回転軸の周面と
を接触させることを特徴とする帯電装置。1. A charging roller for charging a body to be charged, and an elastic member for pressing the charging roller against the body to be charged, and a voltage can be applied to the charging roller via the elastic member. In the charging device, a part of the elastic member and a peripheral surface of the rotating shaft are brought into contact with each other in order to electrically connect the elastic member and the rotating shaft of the charging roller.
性部材によって押圧される絶縁性軸受部材を有すること
を特徴とする請求項1の帯電装置。2. The charging device according to claim 1, wherein the device includes an insulating bearing member that receives the rotating shaft and is pressed by the elastic member.
性部材によって押圧される導電性軸受部材を有し、前記
軸受部材を介して前記回転軸と前記弾性部材とは電気的
に接続されることを特徴とする請求項1の帯電装置。3. The device includes a conductive bearing member that receives the rotating shaft and is pressed by the elastic member, and the rotating shaft and the elastic member are electrically connected via the bearing member. The charging device according to claim 1, wherein:
触する前記弾性部材の一部の位置を規制することを特徴
とする請求項3の帯電装置。4. The charging device according to claim 3, wherein the bearing member regulates a position of a part of the elastic member that is in contact with the peripheral surface of the rotating shaft.
供給する電源とを電気的に接続する電極部材を有するこ
とを特徴とする請求項1乃至4の帯電装置。5. The charging device according to claim 1, wherein the device includes an electrode member that electrically connects the elastic member and a power supply that supplies the voltage.
とを特徴とする請求項1乃至5の帯電装置。6. The charging device according to claim 1, wherein the elastic member has a coil spring shape.
電ローラと、前記帯電ローラを前記像担持体に押圧する
弾性部材と、を有し、前記弾性部材を介して前記帯電ロ
ーラに電圧を印加可能であるプロセスカートリッジにお
いて、 前記弾性部材と前記帯電ローラの回転軸とを電気的に接
続するために前記弾性部材の一部と前記回転軸の周面と
を接触させることを特徴とするプロセスカートリッジ。7. An image carrier, a charging roller that charges the image carrier, and an elastic member that presses the charging roller against the image carrier, and the charging roller is connected to the charging roller via the elastic member. In a process cartridge capable of applying a voltage, a part of the elastic member and a peripheral surface of the rotating shaft are brought into contact with each other in order to electrically connect the elastic member and the rotating shaft of the charging roller. Process cartridge.
軸を受け、前記弾性部材によって押圧される絶縁性軸受
部材を有することを特徴とする請求項7のプロセスカー
トリッジ。8. The process cartridge according to claim 7, wherein the process cartridge includes an insulating bearing member that receives the rotating shaft and is pressed by the elastic member.
軸を受け、前記弾性部材によって押圧される導電性軸受
部材を有し、前記軸受部材を介して前記回転軸と前記弾
性部材とは電気的に接続されることを特徴とする請求項
7のプロセスカートリッジ。9. The process cartridge includes a conductive bearing member that receives the rotating shaft and is pressed by the elastic member, and the rotating shaft and the elastic member are electrically connected via the bearing member. The process cartridge according to claim 7, wherein
接触する前記弾性部材の一部の位置を規制することを特
徴とする請求項9のプロセスカートリッジ。10. The process cartridge according to claim 9, wherein the bearing member regulates a position of a part of the elastic member that is in contact with the peripheral surface of the rotating shaft.
性部材と前記電圧を供給する電源とを電気的に接続する
電極部材を有することを特徴とする請求項7乃至10の
プロセスカートリッジ。11. The process cartridge according to claim 7, wherein the process cartridge includes an electrode member that electrically connects the elastic member and a power supply that supplies the voltage.
ことを特徴とする請求項7乃至11のプロセスカートリ
ッジ。12. The process cartridge according to claim 7, wherein the elastic member has a coil spring shape.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19754695A JPH0943939A (en) | 1995-08-02 | 1995-08-02 | Electrifying device, and process cartridge |
US08/688,926 US5768660A (en) | 1995-08-02 | 1996-07-31 | Charging device and process cartridge |
CN96113226.4A CN1091266C (en) | 1995-08-02 | 1996-08-02 | Charging device and process cartridge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19754695A JPH0943939A (en) | 1995-08-02 | 1995-08-02 | Electrifying device, and process cartridge |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0943939A true JPH0943939A (en) | 1997-02-14 |
Family
ID=16376287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19754695A Withdrawn JPH0943939A (en) | 1995-08-02 | 1995-08-02 | Electrifying device, and process cartridge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0943939A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6954600B2 (en) * | 2002-09-30 | 2005-10-11 | Canon Kabushiki Kaisha | Electric contact member applying voltage to charger, process cartridge, and image forming apparatus |
US7450878B2 (en) | 2005-06-24 | 2008-11-11 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having a process cartridge for receiving power from a power supplying member |
JP2015079060A (en) * | 2013-10-15 | 2015-04-23 | シャープ株式会社 | Charger and image forming apparatus including the same |
JP2016109898A (en) * | 2014-12-08 | 2016-06-20 | キヤノン株式会社 | Electrification device, process cartridge using the same, and image formation apparatus |
JP2016206341A (en) * | 2015-04-20 | 2016-12-08 | 株式会社リコー | Power supply device and image forming apparatus |
JP2017015831A (en) * | 2015-06-29 | 2017-01-19 | 富士ゼロックス株式会社 | Power feeding structure, charger, assembly, and image forming apparatus |
JP2017151285A (en) * | 2016-02-25 | 2017-08-31 | 京セラドキュメントソリューションズ株式会社 | Conduction member and image forming apparatus |
US20170255121A1 (en) * | 2016-03-01 | 2017-09-07 | Kyocera Document Solutions Inc. | Charging device, and image carrying member unit and image forming apparatus therewith |
-
1995
- 1995-08-02 JP JP19754695A patent/JPH0943939A/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6954600B2 (en) * | 2002-09-30 | 2005-10-11 | Canon Kabushiki Kaisha | Electric contact member applying voltage to charger, process cartridge, and image forming apparatus |
US7450878B2 (en) | 2005-06-24 | 2008-11-11 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having a process cartridge for receiving power from a power supplying member |
JP2015079060A (en) * | 2013-10-15 | 2015-04-23 | シャープ株式会社 | Charger and image forming apparatus including the same |
JP2016109898A (en) * | 2014-12-08 | 2016-06-20 | キヤノン株式会社 | Electrification device, process cartridge using the same, and image formation apparatus |
JP2016206341A (en) * | 2015-04-20 | 2016-12-08 | 株式会社リコー | Power supply device and image forming apparatus |
JP2017015831A (en) * | 2015-06-29 | 2017-01-19 | 富士ゼロックス株式会社 | Power feeding structure, charger, assembly, and image forming apparatus |
JP2017151285A (en) * | 2016-02-25 | 2017-08-31 | 京セラドキュメントソリューションズ株式会社 | Conduction member and image forming apparatus |
CN107121905A (en) * | 2016-02-25 | 2017-09-01 | 京瓷办公信息系统株式会社 | Conductive member and image processing system |
US20170255121A1 (en) * | 2016-03-01 | 2017-09-07 | Kyocera Document Solutions Inc. | Charging device, and image carrying member unit and image forming apparatus therewith |
US10209641B2 (en) * | 2016-03-01 | 2019-02-19 | Kyocera Document Solutions Inc. | Charging device, and image carrying member unit and image forming apparatus therewith |
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Legal Events
Date | Code | Title | Description |
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A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20021105 |