JPH10247039A - Grounding device for photoreceptor - Google Patents
Grounding device for photoreceptorInfo
- Publication number
- JPH10247039A JPH10247039A JP9049948A JP4994897A JPH10247039A JP H10247039 A JPH10247039 A JP H10247039A JP 9049948 A JP9049948 A JP 9049948A JP 4994897 A JP4994897 A JP 4994897A JP H10247039 A JPH10247039 A JP H10247039A
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- drive shaft
- contact
- rotary drive
- photoconductor
- 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.)
- Pending
Links
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、回転体のアース構
造に関し、例えばプリンタ、複写機等の画像形成装置の
感光体の接地に用いられるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding structure for a rotating body, and is used for grounding a photosensitive body of an image forming apparatus such as a printer or a copying machine.
【0002】[0002]
【従来の技術】電子写真方式を用いた画像形成装置にお
ける感光体の表面は光導電体層よりなり、一様に帯電さ
れた状態で画像露光を受けると、露光した部分が導電部
となって帯電電荷がアースへ抜け、露光部分と非露光部
分とで電荷が異なることによる静電潜像を形成する。こ
の静電潜像はトナーを担持した現像ローラのバイアス電
圧によってトナーを感光体側に移行させ、感光体表面の
電荷の差と、この電荷及びトナーの正負極性の関係とか
ら、例えば正規現像では非露光部にトナーが付着するこ
とによって現像がなされる。よって、感光体の表面電位
の安定した保持と露光部分の残留電荷が少ないこととが
安定した画像形成をもたらすため、表面電位の基準とな
る感光体本体の接地接続が安定して維持される必要があ
る。2. Description of the Related Art In an image forming apparatus using an electrophotographic method, the surface of a photoreceptor is formed of a photoconductor layer. When an image is exposed in a uniformly charged state, the exposed portion becomes a conductive portion. The charged charge is discharged to the ground, and an electrostatic latent image is formed due to the difference in charge between the exposed portion and the non-exposed portion. This electrostatic latent image transfers the toner to the photoreceptor side by the bias voltage of the developing roller carrying the toner. The development is performed by the toner adhering to the exposed portion. Therefore, since the stable holding of the surface potential of the photoconductor and the low residual charge in the exposed portion result in stable image formation, it is necessary to stably maintain the ground connection of the photoconductor main body, which is the reference of the surface potential. There is.
【0003】前記感光体の接地構造として、実開平4−
124271号公報に開示されたものが知られており、
その構成を図4に示す。The grounding structure of the photoreceptor is disclosed in
No. 124271 is known,
The configuration is shown in FIG.
【0004】図4において、アース板32は、周辺部に
係止突起32aと渦巻き状の切り込みにより周辺部から
中央部に渦巻き状に延びるバネ性を有する接触片32b
とが形成されており、図示するように感光体30内に挿
入されることにより、感光体30の内壁に前記係止突起
が係止接触し、回転体30を軸支する支持軸33の先端
に接触片が摺動接触する。支持軸33は図示しない軸受
け金具等を通じて接地接続されているので、感光体30
はアース板32、支持軸33を通じて接地接続される。In FIG. 4, a grounding plate 32 has a contact piece 32b having a spring property extending spirally from the peripheral portion to the central portion due to a locking projection 32a and a spiral cut in the peripheral portion.
Are inserted into the photoconductor 30 as shown in the figure, and the locking projections are brought into locking contact with the inner wall of the photoconductor 30, and the tip of the support shaft 33 that supports the rotating body 30 is formed. The contact piece makes sliding contact with. Since the support shaft 33 is grounded through a bearing (not shown) or the like, the photosensitive member 30
Are grounded through an earth plate 32 and a support shaft 33.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来技術になる感光体の接地接続の構成では、支持軸とア
ース板との間の接触は小さな1点での接触であるため、
接地不良を発生させる恐れが多分にあった。また、感光
体の回転中の接触点は回転に応じて移動するような状態
で維持されているが、長時間にわたり装置が運転停止さ
れると、接触面に酸化皮膜が発生し、摺動により酸化皮
膜が削除されるまでの間は導通が不完全な状態になり、
接地不良を発生させる問題点があった。However, in the configuration of the ground connection of the photosensitive member according to the prior art, the contact between the support shaft and the ground plate is a small one-point contact.
Possibly there was a risk of poor grounding. In addition, the contact point during rotation of the photoconductor is maintained in a state that moves in accordance with the rotation, but if the device is shut down for a long time, an oxide film is generated on the contact surface, Until the oxide film is removed, conduction is incomplete,
There is a problem that a poor grounding occurs.
【0006】本発明は、上記従来技術の問題点に鑑みて
創案されたもので、回転駆動される感光体の接地接続を
確実にする接地構造を備えた感光体のアース装置を提供
することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a grounding device for a photoreceptor having a grounding structure for ensuring the ground connection of a photoreceptor driven in rotation. It is the purpose.
【0007】[0007]
【課題を解決するための手段】本発明は、感光体に固定
部を固定して設けられ、感光体本体内に挿入されて相対
回動する支持軸の先端部にその外形形状に一致する巻き
形状を持って嵌まり合い圧接する前記固定部から延びた
捻じりスプリングを有し、前記感光体本体を捻じりスプ
リング及び支持軸を介して接地接続することを特徴とす
る感光体のアース装置である。SUMMARY OF THE INVENTION According to the present invention, there is provided a photoreceptor having a fixed portion fixed thereto, and a winding conforming to the outer shape of the end of a support shaft which is inserted into the photoreceptor body and rotates relatively. A photoreceptor grounding device, comprising a torsion spring extending from the fixed portion which is fitted and pressed into contact with the shape, and wherein the photoreceptor body is grounded through the torsion spring and a support shaft. is there.
【0008】上記構成における支持軸の先端部はほぼ円
錐形状であり、これに捻じりスプリングの内径を一致さ
せて構成することができる。The tip of the support shaft in the above configuration has a substantially conical shape, and the inner diameter of the torsion spring can be made to match this.
【0009】電子写真方式による画像形成の主体をなす
感光体は、帯電、露光、現像等のプロセスにおいて、そ
の表面に形成された光導電体層の電位の変化は精密に制
御することが要求され、表面電位の基準となる感光体本
体の接地接続が確実に維持される必要がある。そこで、
感光体の回転を軸支または感光体を回転駆動させる軸体
と感光体との間の電気的接続を行って、画像形成装置の
接地電位部位に電気的に接続されている軸体を介して感
光体本体の接地接続を確実に維持させる。この接地接続
のための感光体と支持軸との間の電気的な接続は、支持
軸の先端部の外形形状に一致する巻き形状を有する捻じ
りスプリングの全長に亘る弾性的な線接触による広域で
なされ、画像形成動作等に伴い感光体と支持軸とが相対
回動する都度、広域で相対回動方向と交差する方向の接
触状態で双方が摺動しあって酸化皮膜を広域に効率的に
削り取り合うので、接触部材の形状や寸法、取付位置等
のばらつきによる接触不良をなくすことができる。The photoreceptor, which mainly forms an image by an electrophotographic method, is required to precisely control the change in the potential of a photoconductor layer formed on the surface during processes such as charging, exposure, and development. In addition, it is necessary to reliably maintain the ground connection of the photoconductor main body, which serves as a reference for the surface potential. Therefore,
An electrical connection is made between the photoconductor and a shaft that supports the rotation of the photoconductor or drives the photoconductor to rotate, and via a shaft that is electrically connected to the ground potential portion of the image forming apparatus. Ensure that the ground connection of the photoreceptor body is maintained. The electrical connection between the photoreceptor and the support shaft for the ground connection is made in a wide area by elastic line contact over the entire length of a torsion spring having a winding shape corresponding to the outer shape of the tip of the support shaft. Each time the photoreceptor and the support shaft rotate relative to each other during image forming operations, etc., the two slide in a contact state in a direction that intersects the relative rotation direction in a wide area, and the oxide film is efficiently spread over a wide area. Therefore, poor contact due to variations in the shape, size, mounting position, etc. of the contact member can be eliminated.
【0010】上記構成における軸体の先端部を円錐形状
に形成し、捻じりスプリングの内径変化を先端部の円錐
形状に一致させて形成することにより、捻じりスプリン
グにを支持軸に圧接接触させやすく、先端部への線接触
による接地接続がなされるとともに、感光体を交換する
着脱時の作業にも容易に対応できる。In the above construction, the distal end of the shaft body is formed in a conical shape, and the inner diameter of the torsion spring is changed in accordance with the conical shape of the distal end so that the torsion spring is brought into pressure contact with the support shaft. This facilitates ground connection by wire contact to the tip, and can easily cope with the work at the time of attachment / detachment for exchanging the photoconductor.
【0011】[0011]
【発明の実施の形態】以下、添付図面を参照して本発明
の一実施形態について説明する。まず、図3を参照して
感光体のアース装置を適用したプリンタの全体構成につ
いて説明する。An embodiment of the present invention will be described below with reference to the accompanying drawings. First, the overall configuration of a printer to which a photoconductor grounding device is applied will be described with reference to FIG.
【0012】図3において、プリンタ1は、コンピュー
タあるいはフロッピーディスクドライブ等のデータソー
スから入力される画像信号により、電子写真方式によっ
て所要サイズのカットシートに画像記録できるように構
成されている。電子写真方式による画像形成の主体をな
す感光体2は、感光体本体の表面に光導電体層を形成し
て構成されており、感光体2の周囲には、帯電チャージ
ャ6、露光装置4、現像装置3、転写チャージャ5、ク
リーナ7等が配設されており、感光体2の回転に同期し
た各部の動作により画像形成が実施される。Referring to FIG. 3, a printer 1 is configured to be able to record an image on a cut sheet of a required size by an electrophotographic method in accordance with an image signal input from a data source such as a computer or a floppy disk drive. The photoreceptor 2, which is a main component of image formation by electrophotography, is configured by forming a photoconductor layer on the surface of a photoreceptor main body, and around the photoreceptor 2, a charging charger 6, an exposure device 4, A developing device 3, a transfer charger 5, a cleaner 7 and the like are provided, and an image is formed by an operation of each unit synchronized with the rotation of the photoconductor 2.
【0013】前記画像信号は露光装置4に入力され、露
光装置4は入力された画像信号によって変調されたレー
ザビームを感光体2上に照射する。感光体2は表面に形
成された光導電体層が帯電チャージャ6により一様に帯
電された状態でレーザ露光を受けると、受光した部分が
導電部となって帯電した電荷が感光体2のアースへ抜け
るため、露光した部分と非露光の部分とで帯電電荷が異
なる静電潜像が形成される。この静電潜像は現像装置3
においてトナーを担持した現像ローラのバイアス電圧に
よってトナーが感光体2側に移行されることにより、感
光体2の表面の電荷の差と、この電荷及びトナーの正負
極性の関係とから、例えば正規現像の場合では非露光部
分にトナーが付着することによって静電潜像はトナー画
像として現像される。The image signal is input to an exposure device 4, and the exposure device 4 irradiates the photosensitive member 2 with a laser beam modulated by the input image signal. When the photoconductor 2 is subjected to laser exposure in a state where the photoconductor layer formed on the surface is uniformly charged by the charging charger 6, the received portion becomes a conductive portion and the charged electric charge is grounded to the photoconductor 2. As a result, an electrostatic latent image having different charged charges is formed between an exposed portion and a non-exposed portion. This electrostatic latent image is stored in the developing device 3
The toner is transferred to the photoreceptor 2 side by the bias voltage of the developing roller carrying the toner in the above-described process. In the case of (1), the electrostatic latent image is developed as a toner image by attaching toner to the non-exposed portion.
【0014】給紙部8にはサイズ毎のカットシートが収
容されており、選択されたサイズのカットシートが搬送
ローラ9、9…により搬送され、タイミングローラ10
の位置まで供給される。タイミングローラ10は前記現
像の進行にタイミングを合わせてカットシートを感光体
2と転写チャージャ5との間に送給し、カットシート上
にトナー画像が転写される。この画像が転写されたカッ
トシートは、カットシートを吸着して搬送移動する搬送
ベルト11により搬送され、定着器12が備えるローラ
によって加熱と加圧とを受けることにより転写画像はカ
ットシート上に定着され、排紙ローラ13により装置外
に排出される。The sheet feeding section 8 stores cut sheets of each size, and cut sheets of a selected size are conveyed by conveying rollers 9, 9,.
Is supplied to the position. The timing roller 10 feeds the cut sheet between the photoreceptor 2 and the transfer charger 5 in synchronization with the progress of the development, and the toner image is transferred onto the cut sheet. The cut sheet on which the image has been transferred is conveyed by a conveyance belt 11 that adsorbs and conveys the cut sheet, and is heated and pressed by rollers provided in the fixing device 12, so that the transferred image is fixed on the cut sheet. Then, the sheet is discharged out of the apparatus by the discharge roller 13.
【0015】トナー画像がカットシートに転写された
後、感光体2の表面はクリーナ7によって残留するトナ
ーが除去され、更に残留電荷が除去され、次の画像形成
を行うために再び帯電チャージャ6により帯電が行わ
れ、前記動作により画像形成が実施される。このよう
に、感光体2は、帯電、露光、現像、転写、除電等を繰
り返し受けて表面電位が変化し、この表面電位の微妙な
変化により精密な画像形成がなされる。従って、感光体
の表面電位の安定した保持と露光した部分の残留電荷が
少ないこととが安定した画像形成をもたらすため、表面
電位の基準となる感光体本体の接地接続が安定して維持
される必要がある。After the toner image is transferred to the cut sheet, the remaining toner is removed from the surface of the photoreceptor 2 by a cleaner 7, the remaining charge is further removed, and the charged charger 6 again performs the next image formation. Charging is performed, and an image is formed by the above operation. As described above, the surface potential of the photoreceptor 2 changes due to repeated charging, exposure, development, transfer, charge elimination, and the like, and a fine image is formed by the subtle change in the surface potential. Therefore, since the stable holding of the surface potential of the photoconductor and the low residual charge in the exposed portion provide stable image formation, the ground connection of the photoconductor main body, which is the reference of the surface potential, is stably maintained. There is a need.
【0016】以下に、前記感光体2の接地構造につい
て、図1、図2を参照して説明する。The grounding structure of the photoconductor 2 will be described below with reference to FIGS.
【0017】図1において、感光体2は、その交換を可
能とするために、感光体2を支持すると共に回転駆動さ
せる回転駆動軸(支持軸)15に対して着脱自在に取り
付けられている。感光体2の回転駆動軸15への取り付
けは、回転駆動軸15に取り付けられたドッキング爪1
6をアルミダイキャストによって形成された感光体2の
フランジ部2aに嵌合させることによってなされ、嵌合
を解くことによって感光体2を取り外すことができる。In FIG. 1, the photosensitive member 2 is detachably attached to a rotation drive shaft (support shaft) 15 that supports and rotates the photosensitive member 2 so that the photosensitive member 2 can be replaced. The photosensitive member 2 is attached to the rotation drive shaft 15 by the docking claw 1 attached to the rotation drive shaft 15.
6 is fitted to the flange portion 2a of the photoconductor 2 formed by aluminum die casting, and the photoconductor 2 can be removed by releasing the fitting.
【0018】回転駆動軸15は装置フレーム14に支持
されると共に、駆動伝達部17が取り付けられ、駆動伝
達部17にタイミングベルト19から伝達される駆動力
により感光体2を回転駆動する。The rotary drive shaft 15 is supported by the apparatus frame 14 and has a drive transmission unit 17 mounted thereon. The photoreceptor 2 is driven to rotate by the driving force transmitted from the timing belt 19 to the drive transmission unit 17.
【0019】この回転駆動軸15の感光体2側は、回転
駆動軸15の感光体2に挿入された先端部に弾性接触す
る接触子20により感光体2のフランジ部2aに電気的
に接続され、装置フレーム14側はアース板18によっ
て装置フレーム14に電気的に接続されるので、感光体
2は回転駆動軸15を介して接地接続される。The photosensitive member 2 side of the rotary drive shaft 15 is electrically connected to the flange portion 2a of the photosensitive member 2 by a contact 20 elastically contacting the tip of the rotary drive shaft 15 inserted into the photosensitive member 2. Since the apparatus frame 14 is electrically connected to the apparatus frame 14 by the ground plate 18, the photosensitive member 2 is grounded via the rotary drive shaft 15.
【0020】前記接触子20は、図2に示すように、一
方側に回転駆動軸15の先端部の円錐形状に一致する捻
じりスプリング20aが形成され、他方側はネジ固定部
20bが形成されている。ネジ固定部20bはネジ21
によりフランジ部2aに固定され、捻じりスプリング2
0aは、感光体2を回転駆動軸15に取り付けたとき、
回転駆動軸15の先端部が圧入され、円錐形状の直径変
化に一致させた渦巻き形状が回転駆動軸15の挿入圧に
よって先端部の形状に沿って回転駆動軸15の挿入方向
に延びて先端部に巻き付くような螺旋形状となり、回転
駆動軸15の先端部に弾性接触する。As shown in FIG. 2, the contact 20 has a torsion spring 20a on one side corresponding to the conical shape of the tip of the rotary drive shaft 15, and a screw fixing portion 20b on the other side. ing. The screw fixing part 20b is a screw 21
Is fixed to the flange portion 2a by the torsion spring 2
0a is when the photoconductor 2 is attached to the rotary drive shaft 15,
The tip of the rotary drive shaft 15 is press-fitted, and the spiral shape conforming to the change in the diameter of the conical shape extends in the insertion direction of the rotary drive shaft 15 along the shape of the tip by the insertion pressure of the rotary drive shaft 15 and the tip portion , And comes into elastic contact with the tip of the rotary drive shaft 15.
【0021】捻じりスプリング20aは、その全長に亘
る弾性的な線接触により回転駆動軸15の先端部に広域
で接触するので安定した電気的な接続状態が確保され
る。また、前記ドッキング爪16により感光体2を回転
駆動軸15に取り付ける構造では、嵌合状態に回転方向
の遊びが所定量あるため、回転駆動の開始時に回転駆動
軸15の回転が感光体2に伝達されるとき、回転駆動軸
15の先端部と捻じりスプリング20aとの間に前記遊
びの分だけ相対回動して摺動接触する状態が生まれるの
で、装置が長時間にわたり停止していたような場合に、
回転駆動体15の先端部及び捻じりスプリング20aに
酸化皮膜が生じたとしても、相対回動するときの摺動接
触により互いにこすり取り合う状態により酸化皮膜が除
去されるので、酸化皮膜による電気的接続の低下が防止
できる。回転駆動軸15の回転駆動が停止すると、感光
体2は前記遊び分だけ慣性回転してから停止するので、
回転駆動の都度前記相対移動による酸化皮膜除去の働き
を保証することができる。The torsion spring 20a contacts the tip of the rotary drive shaft 15 over a wide area by elastic line contact over its entire length, so that a stable electrical connection is ensured. Further, in the structure in which the photosensitive member 2 is attached to the rotation drive shaft 15 by the docking claw 16, since there is a predetermined amount of play in the rotation direction in the fitted state, the rotation of the rotation drive shaft 15 is applied to the photosensitive member 2 at the start of the rotation drive. When transmitted, a state is created in which the tip of the rotary drive shaft 15 and the torsion spring 20a are relatively rotated and slidably contacted by the play, so that the apparatus has been stopped for a long time. If
Even if an oxide film is formed on the tip end of the rotary driving body 15 and the torsion spring 20a, the oxide film is removed by rubbing each other due to sliding contact during relative rotation. Can be prevented from decreasing. When the rotation drive of the rotation drive shaft 15 is stopped, the photosensitive member 2 stops after inertia rotation by the play,
The function of removing the oxide film by the relative movement can be guaranteed each time the rotary drive is performed.
【0022】上記したように回転駆動軸15の先端部の
形状は、円錐形状に形成されていることが望ましく、こ
れに対応させて捻じりスプリング20aの内径変化を先
端部の円錐形状による直径変化に一致させて形成する
と、先端部の圧入により捻じりスプリング20aが先端
部に沿って変形しながら弾性接触し、先端部への線接触
が広域にわたってなされるとともに、感光体を交換する
着脱時の作業にも容易に対応できる。しかしながら捻じ
りスプリング20aを回転駆動軸15の先端部に一致す
るように最初から巻き形状を設定しておくこともでき
る。この場合回転駆動軸15の外周円筒面に嵌め合わせ
るのにも適する。もっとも捻じりスプリング20aは回
転駆動軸15の回転時の摩擦により巻きゆるめられる方
向に巻き方向を設定しておくのが無理のない接触状態を
得るのに好適であり、場合によっては固定軸と感光体2
との間にも設けられる。As described above, the tip of the rotary drive shaft 15 is desirably formed in a conical shape. Correspondingly, the inner diameter of the torsion spring 20a is changed by the conical shape of the tip. When the torsion spring 20a is deformed along the distal end portion by the press-fitting of the distal end portion, the torsion spring 20a makes elastic contact while being deformed along the distal end portion, and a line contact with the distal end portion is made over a wide area. It can easily cope with work. However, it is also possible to set the winding shape from the beginning so that the torsion spring 20a coincides with the tip of the rotary drive shaft 15. In this case, it is also suitable to fit the outer peripheral cylindrical surface of the rotary drive shaft 15. However, it is preferable to set the winding direction of the torsion spring 20a in a direction in which the winding can be loosened by friction at the time of rotation of the rotary drive shaft 15 in order to obtain a reasonable contact state. Body 2
Is also provided between them.
【0023】[0023]
【発明の効果】以上の説明の通り本発明によれば、接地
接続のための感光体と支持軸との間の電気的な接続は、
支持軸の先端部の外形形状に一致する巻き形状を有する
捻じりスプリングの全長に亘る弾性的な線接触による広
域でなされ、画像形成動作等に伴い感光体と支持軸とが
相対回動する都度、広域で相対回動方向と交差する方向
の接触状態で双方が摺動しあって酸化皮膜を広域に効率
的に削り取り合うので、接触部材の形状や寸法、取付位
置等のばらつきによる接触不良をなくすことができ、感
光体の接地接続が安定してなされる結果、画像形成が安
定して行うことができる効果を奏する。As described above, according to the present invention, the electrical connection between the photoreceptor for ground connection and the support shaft is:
Each time the torsion spring having a winding shape that matches the outer shape of the tip of the support shaft is made over a wide area by elastic line contact over the entire length, and the photosensitive member and the support shaft rotate relative to each other in accordance with an image forming operation or the like. , Both sides slide in a contact state in a direction that intersects the relative rotation direction in a wide area, and the oxide film is efficiently scraped off over a wide area, so that contact failure due to variations in the shape, size, mounting position, etc. of the contact member As a result, the ground connection of the photoconductor is stably performed, and as a result, an effect of stably performing image formation can be obtained.
【0024】また、支持軸の先端部を円錐形状に形成
し、捻じりスプリングの内径変化を先端部の円錐形状に
一致させて形成することにより、捻じりスプリングにを
支持軸に圧接接触させやすく、先端部への線接触による
接地接続がなされるとともに、感光体を交換する着脱時
の作業にも容易に対応できる。Further, the tip of the support shaft is formed in a conical shape, and the change in the inner diameter of the torsion spring is formed so as to match the conical shape of the tip, so that the torsion spring is easily brought into pressure contact with the support shaft. In addition to the fact that the ground connection is made by line contact with the leading end, it is also possible to easily cope with the work at the time of attaching and detaching the photoconductor.
【図1】本発明の実施形態に係る感光体の接地構造を示
す平面図。FIG. 1 is a plan view showing a grounding structure of a photoconductor according to an embodiment of the present invention.
【図2】同構成における接触子の構成を示す平面図。FIG. 2 is a plan view showing a configuration of a contact in the same configuration.
【図3】画像形成装置の一例であるプリンタの概略構成
を示す構成図。FIG. 3 is a configuration diagram illustrating a schematic configuration of a printer as an example of an image forming apparatus.
【図4】従来技術に係る感光体の接地構造を示す斜視
図。FIG. 4 is a perspective view showing a grounding structure of a photoconductor according to a conventional technique.
1 プリンタ 2 感光体 14 装置フレーム(接地電位部) 15 回転駆動軸(支持軸) 18 アース板 20 接触子 20a コイルスプリング 20b 固定部 DESCRIPTION OF SYMBOLS 1 Printer 2 Photoreceptor 14 Device frame (ground potential part) 15 Rotation drive shaft (support shaft) 18 Ground plate 20 Contact 20a Coil spring 20b Fixed part
Claims (2)
光体本体内に挿入されて相対回動する支持軸の先端部に
その外形形状に一致する巻き形状を持って嵌まり合い圧
接する前記固定部から延びた捻じりスプリングを有し、
前記感光体本体を捻じりスプリング及び支持軸を介して
接地接続することを特徴とする感光体のアース装置。1. A fixing portion fixed to a photoreceptor is provided, and is fitted into a leading end portion of a support shaft which is inserted into a photoreceptor main body and rotates relatively, with a winding shape corresponding to the outer shape thereof, and press-fitted. Having a torsion spring extending from the fixed portion,
An earthing device for a photoreceptor, wherein the photoreceptor main body is connected to ground via a torsion spring and a support shaft.
これに捻じりスプリングの内径を一致させた請求項1記
載の感光体のアース装置。2. The tip of the support shaft has a substantially conical shape,
2. The grounding device for a photoconductor according to claim 1, wherein the inner diameter of the torsion spring is made to coincide with this.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9049948A JPH10247039A (en) | 1997-03-05 | 1997-03-05 | Grounding device for photoreceptor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9049948A JPH10247039A (en) | 1997-03-05 | 1997-03-05 | Grounding device for photoreceptor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10247039A true JPH10247039A (en) | 1998-09-14 |
Family
ID=12845261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9049948A Pending JPH10247039A (en) | 1997-03-05 | 1997-03-05 | Grounding device for photoreceptor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10247039A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8326179B2 (en) | 2008-11-28 | 2012-12-04 | Brother Kogyo Kabushiki Kaisha | Tandem type photosensitive unit and image forming apparatus |
-
1997
- 1997-03-05 JP JP9049948A patent/JPH10247039A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8326179B2 (en) | 2008-11-28 | 2012-12-04 | Brother Kogyo Kabushiki Kaisha | Tandem type photosensitive unit and image forming apparatus |
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