JPH03265881A - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPH03265881A
JPH03265881A JP2064420A JP6442090A JPH03265881A JP H03265881 A JPH03265881 A JP H03265881A JP 2064420 A JP2064420 A JP 2064420A JP 6442090 A JP6442090 A JP 6442090A JP H03265881 A JPH03265881 A JP H03265881A
Authority
JP
Japan
Prior art keywords
drum
contact
drum structure
electrically connected
frame
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
Application number
JP2064420A
Other languages
Japanese (ja)
Inventor
Hirotaka Fukuyama
広高 福山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2064420A priority Critical patent/JPH03265881A/en
Publication of JPH03265881A publication Critical patent/JPH03265881A/en
Pending legal-status Critical Current

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  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To release a charge accumulated on a photosensitive drum to the ground by bringing standing still conductive member into contact with plural places of a drum structure and connecting these conductive members with the ground via a conductive member for an earthing circuit provided on a device main body. CONSTITUTION:In the drum structure 1, the photosensitive body 2 is electrically connected to a drum shaft 3 via a holding member 5. In a frame 6, bearings 7 serve as plural conductive members connected to plural places of the drum structure 1 and come in contact with two places of the drum shaft 3 of the drum structure 1 to be electrically connected. In other words, the conductive members are brought into contact with two places of the drum structure 1 to be electrically connected. In the frame 6, a copper plate 9 is electrically connected to two bearings 7 and a positioning pin 8, it comes in contact with a contacting spring 14 provided on the device main body 11 to be electrically connected, and the contacting spring 14 is electrically connected to the ground G. Thus, the charge can be prevented from being accumulated on the photosensitive drum 2.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は感光体ドラムを備え、この感光体ドラムに帯電
した電荷をグランドに逃がすための接地回路を設けた電
子写真装置に関する。
[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention provides an electrophotographic apparatus that is equipped with a photoreceptor drum and is provided with a grounding circuit for dissipating the electric charge charged on the photoreceptor drum to the ground. Regarding.

(従来の技術) レーザビームプリンタやファクシミリ装置などに使用さ
れる電子写真装置として、回転自在な感光体ドラムの周
囲に、基都擢神六露光装置、現像装置、転写装置、クリ
ーニング装置、除電装置および帯電装置を並べて配置し
、画像形成時には感光体ドラムの回転に伴い帯電装置で
ドラム表面を帯電し、露光装置でドラム表面に静電潜像
を形成し、現像装置でドラム表面の潜像を現像してトナ
ー像を形成し、転写装置でドラム表面の1・す像を記録
紙に転写し、さらにクリーニング装置でドラム表面に残
留したトナーを取り除き、除電装置でドラム表面に残留
した電荷を取り除く形式のものがある。
(Prior art) As an electrophotographic device used in laser beam printers, facsimile machines, etc., around a freely rotatable photoreceptor drum, there are an exposure device, a developing device, a transfer device, a cleaning device, and a static eliminator. and a charging device are arranged side by side, and during image formation, the charging device charges the drum surface as the photoreceptor drum rotates, the exposure device forms an electrostatic latent image on the drum surface, and the developing device forms a latent image on the drum surface. Develop to form a toner image, transfer the first image on the drum surface to recording paper using a transfer device, remove toner remaining on the drum surface using a cleaning device, and remove electric charge remaining on the drum surface using a static eliminator. There is a format.

この形式の電子写真装置においては、種々の理由により
感光体ドラムの表面には電荷か帯電し蓄積する。感光体
ドラムの表面に蓄積する電荷の量が多くなると、感光体
ドラムとこれに近接する金属製部祠との間で放電を起し
、この結果電子写真装置の制御装置に誤動作を発生させ
ることがある。
In this type of electrophotographic apparatus, charges accumulate on the surface of the photoreceptor drum for various reasons. When the amount of charge accumulated on the surface of the photoreceptor drum increases, electric discharge occurs between the photoreceptor drum and a nearby metal part, resulting in malfunction of the control device of the electrophotographic device. There is.

従って、感光体ドラムを用いた電子写真装置においては
、感光体ドラムにおける電荷の蓄積を回避するために、
感光体ドラムをグランドに接続して感光体ドラムに帯電
した電荷をグランドに逃がすようにしている。
Therefore, in an electrophotographic apparatus using a photoreceptor drum, in order to avoid accumulation of charge on the photoreceptor drum,
The photoreceptor drum is connected to the ground so that the electric charge on the photoreceptor drum is released to the ground.

一般に感光体ドラムを用いた電子写真装置では、感光体
ドラムをドラム軸で支持してドラム構造体を構成し、こ
のドラム構造体のドラム軸を回転自在に支承して感光体
ドラムを回転自在に設けている。
Generally, in an electrophotographic apparatus using a photoreceptor drum, the photoreceptor drum is supported by a drum shaft to form a drum structure, and the drum shaft of this drum structure is rotatably supported to allow the photoreceptor drum to rotate freely. It is set up.

感光体ドラムを用いた従来の電子写真装置では、接地回
路に接続した導電性金属からなる接触部材をドラム構造
体における1か所に接触して感光体ドラムをグランドに
接続している。
In a conventional electrophotographic apparatus using a photoreceptor drum, a contact member made of a conductive metal connected to a ground circuit is brought into contact with one location on the drum structure to connect the photoreceptor drum to the ground.

(発明が解決しようとする課題) しかしながら、感光体ドラムをグランドに接続する構造
が前記の内容であると、次に述べる問題が発生している
(Problems to be Solved by the Invention) However, if the structure for connecting the photosensitive drum to the ground is as described above, the following problems occur.

すなわち、回転するドラム構造体に接触している接触部
材を長い期間使用していると、接触部材の金属疲労およ
びドラム軸の回転振動により、ドラム構造体に対する接
触部材の接触が不安定になることかある。このようにド
ラム構造体の1か所に接触している接触部材の接触状態
が不安定になると、接触部材とドラム構造体との電気的
接続が不安定になり、この結果として接触部材を介して
感光体ドラムとグランドとを接続しているグランドとの
電気的接続が不安定になり、感光体ドラムに蓄積してい
る電荷をグランドに逃がすことが不十分になる。
In other words, if a contact member that is in contact with a rotating drum structure is used for a long period of time, the contact of the contact member with the drum structure becomes unstable due to metal fatigue of the contact member and rotational vibration of the drum shaft. There is. If the contact state of the contact member that is in contact with one place on the drum structure becomes unstable in this way, the electrical connection between the contact member and the drum structure becomes unstable, and as a result, the electrical connection between the contact member and the drum structure becomes unstable. As a result, the electrical connection between the photoreceptor drum and the ground connecting the photoreceptor drum becomes unstable, and the charge accumulated on the photoreceptor drum cannot be sufficiently released to the ground.

本発明は前記事情に基づいてなされたもので、感光体ド
ラムと接地回路との電気的接続を安定して維持できる電
子写真装置を提供することを目的とする。
The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide an electrophotographic apparatus that can stably maintain electrical connection between a photosensitive drum and a ground circuit.

[発明の構成] (課題を解決するための手段) 前記目的を達成するために本発明の電子写真装置は、感
光体ドラムおよびこの感光体ドラムを支持するドラム軸
からなるドラム構造体を備えた電子写真装置において、
ドラム構造体の複数箇所に静止した導電性部材が接触さ
れ、これら導電性部材は装置本体に設けた接地回路用導
電性部材を介してグランドに接続されてなることを特徴
とするものである。
[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, an electrophotographic apparatus of the present invention includes a drum structure including a photoreceptor drum and a drum shaft that supports the photoreceptor drum. In electrophotographic equipment,
A stationary conductive member is brought into contact with a plurality of locations on the drum structure, and these conductive members are connected to the ground via a ground circuit conductive member provided in the main body of the device.

具体的には、ドラム構造体のドラム軸かフレムに回転自
在に回転自在に支承され、このフレムにドラム構造体に
接触する複数の導電性部材が設けられた構造が好ましい
Specifically, a structure is preferred in which the drum shaft of the drum structure is rotatably supported by a frame, and the frame is provided with a plurality of conductive members that contact the drum structure.

(作 用) ドラム構造体の複数箇所に導電性部材が接触するので、
いずれか導電性部材がドラム構造体の接触が不安定にな
っても、他の導電性部材とドラム構造体との接触により
、ドラム構造体とグランドとの電気的接続を補うため、
ドラム構造体とグランドとの安定した電気的接続を維持
できる。
(Function) Since the conductive member contacts multiple locations on the drum structure,
Even if the contact between one of the conductive members and the drum structure becomes unstable, the contact between the other conductive members and the drum structure will compensate for the electrical connection between the drum structure and the ground.
A stable electrical connection between the drum structure and ground can be maintained.

特にドラム構造体のドラム軸がフレームに回転自在に回
転自在に支承され、このフレームにドラム構造体に接触
する複数の導電性部材が設けられた構造であると、導電
性部材を装置本体に設けた導電性部材に安定して接続で
きる。
In particular, if the drum shaft of the drum structure is rotatably supported by a frame, and the frame is provided with a plurality of conductive members that contact the drum structure, the conductive members may be installed in the main body of the device. It can be stably connected to conductive members.

(実施例) 以下、本発明の実施例について図面を参照して説明する
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

本発明の電子写真装置の一実施例を第1図を参照して説
明する。
An embodiment of the electrophotographic apparatus of the present invention will be described with reference to FIG.

第1図は電子写真装置においてドラム構造体を設けた部
分を示している。
FIG. 1 shows a portion of an electrophotographic apparatus in which a drum structure is provided.

図中1はドラム構造体で、これは感光体ドラム2とドラ
ム軸3とで構成されている。感光体ドラム2はアルミニ
ウムなとの導電性金属からなるもので、表面に感光体層
4が形成されている。ドラム軸3は導電性金属からなる
もので、感光体ドラム1の内部に軸方向に挿通されて導
電性金属からなる保持部材5によって感光体ドラム1を
保持固定している。6はフレームで、感光体ドラム2を
跨ぐ形状をなしている。フレーム6の両側部に導電性金
属からなるブツシュ形をなす軸受7,7が嵌着されてい
る。この軸受7,7は例えば焼結合金に含油処理したも
のである。フレーム6の内部に感光体ドラム2が配置さ
れ、ドラム軸3の両端部がフレーム6に設けた軸受7,
7に挿通して回転自在に支承されている。フレーム6の
一方の端部には、ドラム軸3と平行に配置された導電性
金属からなる位置決めピン8に一端が嵌着固定されてい
る。フレーム6の表面には、両方の軸受7゜7および位
置決めピン8を接続する銅板9が設けられている。この
銅板9は両方の軸受7と軸受7の各配置部を結んでフレ
ーム6の表面にその形状に沿って配置され、各軸受7,
7および位置決めピン8が夫々貫通して接触しており、
全体が絶縁性接着剤によりフレーム6に接着されている
。なお、ドラム軸3には回転伝達用の歯車1oが取付け
である。
In the figure, 1 is a drum structure, which is composed of a photosensitive drum 2 and a drum shaft 3. The photosensitive drum 2 is made of a conductive metal such as aluminum, and has a photosensitive layer 4 formed on its surface. The drum shaft 3 is made of conductive metal, and is inserted into the inside of the photoreceptor drum 1 in the axial direction, and holds and fixes the photoreceptor drum 1 with a holding member 5 made of conductive metal. A frame 6 has a shape that straddles the photoreceptor drum 2. Bush-shaped bearings 7, 7 made of conductive metal are fitted on both sides of the frame 6. The bearings 7, 7 are made of, for example, a sintered alloy treated with oil. A photoreceptor drum 2 is disposed inside a frame 6, and both ends of a drum shaft 3 are mounted on bearings 7 provided in the frame 6.
7 and is rotatably supported. One end of the frame 6 is fitted and fixed to a positioning pin 8 made of conductive metal and arranged parallel to the drum shaft 3 . A copper plate 9 is provided on the surface of the frame 6, which connects both bearings 7.7 and the positioning pin 8. This copper plate 9 connects both bearings 7 and each arrangement part of the bearing 7, and is arranged on the surface of the frame 6 along the shape of each bearing 7,
7 and the positioning pin 8 are respectively penetrated and in contact with each other,
The entire structure is bonded to the frame 6 with an insulating adhesive. Note that a gear 1o for rotation transmission is attached to the drum shaft 3.

第1図はドラム構造体1を電子写真装置の装置本体]]
に装着した状態を示している、電子写真装置の装置本体
1]について説明を加える。金属からなる装置本体11
にはドラム構造体1およびフレーム6を挿入および抜き
出し可能に装着するドラム構造体装着部が設けられてい
る。このドラム構造体装着部に面する装置本体1]の側
壁にはドラム構造体1のドラム軸3が挿入される孔12
と位置決めピン8か挿入される孔13が形成されている
。また、装置本体1]には位置決めピン8が挿入される
孔13に対応して導電性金属からなる接地回路用導電性
部材である接触ばね14が配置され、この部材14はビ
ス15により側壁に取付は固定されている。従って、ド
ラム構造体]とフレーム6を装置本体11のドラム構造
体装着部に挿入すると、ドラム構造体1のドラム軸3の
一端が装置本体11の側壁に形成した孔12に挿入され
、フレーム6に取付だ位置決めピン8に先端が装置本体
]1の側壁に形成した孔13に挿入される。これにより
ドラム構造体1とフレーム6の位置決めがなされる。ま
た、フレーム6に取付だ位置決めピン8に先端を装置本
体11の側壁に形成した孔13に挿入すると、位置決め
ピンの端面が孔13に対応して側壁に取付けられた接触
ばね14に抑圧接触する。接触ばね14は適宜な手段で
グランドGに対して電気的に接続されている。
FIG. 1 shows the drum structure 1 as the main body of an electrophotographic apparatus]
The apparatus main body 1 of the electrophotographic apparatus, which is shown attached to the apparatus, will be explained below. Device body 11 made of metal
is provided with a drum structure mounting portion into which the drum structure 1 and frame 6 are inserted and removed. A hole 12 into which the drum shaft 3 of the drum structure 1 is inserted is formed in the side wall of the device main body 1 facing the drum structure mounting portion.
A hole 13 into which the positioning pin 8 is inserted is formed. In addition, a contact spring 14, which is a conductive member for a grounding circuit made of conductive metal, is arranged in the device main body 1 in correspondence with the hole 13 into which the positioning pin 8 is inserted, and this member 14 is attached to the side wall with a screw 15. The installation is fixed. Therefore, when the drum structure] and the frame 6 are inserted into the drum structure mounting portion of the apparatus main body 11, one end of the drum shaft 3 of the drum structure 1 is inserted into the hole 12 formed in the side wall of the apparatus main body 11, and the frame 6 is inserted into the hole 12 formed in the side wall of the apparatus main body 11. The tip of the positioning pin 8 is inserted into the hole 13 formed in the side wall of the device body 1. This positions the drum structure 1 and the frame 6. Further, when the tip of the positioning pin 8 attached to the frame 6 is inserted into the hole 13 formed in the side wall of the device main body 11, the end surface of the positioning pin comes into pressure contact with the contact spring 14 attached to the side wall corresponding to the hole 13. . Contact spring 14 is electrically connected to ground G by any suitable means.

なお、図示しないが、ドラム構造体1の周囲に帯電装置
、露光装置、転写装置、定着装置、クリニング装置およ
び除電装置が配置されている。
Although not shown, a charging device, an exposure device, a transfer device, a fixing device, a cleaning device, and a static eliminator are arranged around the drum structure 1.

また、フレーム6にクリーニング装置および除電装置を
設けて感光体ユニットを構成することが可能である。
Further, it is possible to configure a photoreceptor unit by providing a cleaning device and a static eliminator in the frame 6.

ドラム構造体1の感光体ドラム2をグランドに接続する
ための構成について説明する。
A configuration for connecting the photosensitive drum 2 of the drum structure 1 to the ground will be described.

ドラム構造体1では、感光体ドラム2が保持部材5を介
してドラム軸3に電気的に接続している。
In the drum structure 1 , a photosensitive drum 2 is electrically connected to a drum shaft 3 via a holding member 5 .

フレーム6では軸受7,7がドラム構造体1に複数箇所
に対して接続する複数個の導電性部材の役割を果たし、
ドラム構造体1のドラム軸3の2か所に接触して電気的
に接続している。すなわち、ドラム構造体]の2か所に
導電性部材が接触して電気的に接続している。フレーム
6では、銅板9が2個の軸受7,7と位置決めピン8に
電気的に接続されている。さらに、フレーム6に設けた
位置決めピン8は、装置本体11に設けた接触ばね]4
に接触して電気的に接続している。接触ばね14はグラ
ンド′Gに電気的に接続している。これにより感光体ド
ラム2は保持部材5、ドラム軸3、軸受7,7、銅板9
、位置決めピン8および接触ばね14を介してグランド
Gに電気的に接続している。
In the frame 6, the bearings 7, 7 play the role of a plurality of conductive members connected to the drum structure 1 at a plurality of locations,
It contacts two places on the drum shaft 3 of the drum structure 1 and is electrically connected. In other words, the conductive member contacts two locations of the drum structure and is electrically connected. In the frame 6, a copper plate 9 is electrically connected to two bearings 7, 7 and a positioning pin 8. Furthermore, the positioning pin 8 provided on the frame 6 is connected to the contact spring provided on the device main body 11 ] 4
is in contact with and electrically connected. Contact spring 14 is electrically connected to ground 'G. As a result, the photosensitive drum 2 includes the holding member 5, the drum shaft 3, the bearings 7, 7, and the copper plate 9.
, are electrically connected to ground G via positioning pin 8 and contact spring 14.

電子写真装置を稼働して画像記録を行ためには、装置本
体に設けた図示しない回転駆動装置の回転を歯車19に
伝達してドラム軸3を回転し、ドラム軸3と一体に感光
体ドラム2を回転する。ここで、回転するドラム構造体
]の感光体ドラム2には種々の理由により電荷が帯電す
る。感光体トラム2に帯電した電荷は前記した構成の接
地回路を構成する各部品、すなわち保持部材5、ドラム
軸3、軸受7,7、銅板9、位置決めピン8および接触
ばね10を通ってグランドGへ放出される。
In order to operate the electrophotographic apparatus to record an image, the rotation of a rotary drive device (not shown) provided in the apparatus main body is transmitted to the gear 19 to rotate the drum shaft 3, and the drum shaft 3 is integrated with the photosensitive drum. Rotate 2. Here, the photosensitive drum 2 of the rotating drum structure is charged with electric charges for various reasons. The electric charge on the photoconductor tram 2 passes through the components constituting the grounding circuit configured as described above, that is, the holding member 5, the drum shaft 3, the bearings 7, 7, the copper plate 9, the positioning pin 8, and the contact spring 10, and reaches the ground G. released to.

この実施例において導電性部材として採用した軸受7,
7はドラム軸3に接触ばねを摺接させる場合に比較して
長期にわたり安定してドラム軸3と接触する。
The bearing 7 adopted as a conductive member in this example,
7 makes stable contact with the drum shaft 3 over a long period of time compared to the case where a contact spring is brought into sliding contact with the drum shaft 3.

しかし、電子写真装置を長い期間稼働している0 と、ドラム構造体]のドラム軸3を軸受7,7の金属疲
労およびドラム軸3の回転振動により、軸受7,7のい
ずれかかのドラム軸3に対する接触が不安定になり、こ
の結果その軸受7とドラム軸3との電気的接続が不安定
になることがある。
However, when an electrophotographic apparatus is operated for a long period of time, the drum shaft 3 of the drum structure may be damaged due to metal fatigue of the bearings 7, 7 and rotational vibration of the drum shaft 3. The contact with the shaft 3 may become unstable, and as a result, the electrical connection between the bearing 7 and the drum shaft 3 may become unstable.

ところが、この実施例では他方の軸受7がドラム軸3に
対して接触していることにより、この他方の軸受7とド
ラム軸3との接触が前記一方の軸受7とドラム軸3との
接触状態の異常を補って軸受とドラム軸3との接触を維
持できる。
However, in this embodiment, since the other bearing 7 is in contact with the drum shaft 3, the contact between the other bearing 7 and the drum shaft 3 is different from the contact state between the one bearing 7 and the drum shaft 3. Contact between the bearing and the drum shaft 3 can be maintained by compensating for the abnormality.

従って、感光体ドラム2とグランドとの電気的接続を安
定して維持でき、感光体ドラム2に帯電した電荷を安定
して継続して放出することができ、感光体ドラム2から
の放電により制御装置の誤動作を防止することができる また、フレーム6に設けた位置決めピン8は、ドラム構
造体]の回転に影響されることな(、装置本体11に設
けた接触ばね14に静止状態で安定して接触する。
Therefore, the electrical connection between the photoreceptor drum 2 and the ground can be stably maintained, and the electric charge charged on the photoreceptor drum 2 can be discharged stably and continuously, and the discharge from the photoreceptor drum 2 can be controlled. In addition, the positioning pin 8 provided on the frame 6 is not affected by the rotation of the drum structure (and is stabilized in a stationary state by the contact spring 14 provided on the device body 11). Contact.

第2図は本発明の他の実施例を示している。第1 2図は第1図に示す構成においてドラム構造体1に接触
する導電性部材が異なったものであり、第1図と同じ部
分は同じ符号を付して示している。
FIG. 2 shows another embodiment of the invention. FIG. 12 shows the structure shown in FIG. 1 except that the conductive member that contacts the drum structure 1 is different, and the same parts as in FIG. 1 are designated by the same reference numerals.

第2図に示す実施例では、導電性部材として導電性金属
からなる2個の接触ばね16,1.6を使用し、これら
接触ばね16,1.6をビス17゜17によりフレーム
6に取付け、感光体ドラム2の両端に摺接させたもので
ある。接触ばね1616はフレーム6に設けた銅板9に
電気的に接続する。
In the embodiment shown in FIG. 2, two contact springs 16, 1.6 made of conductive metal are used as conductive members, and these contact springs 16, 1.6 are attached to the frame 6 with screws 17° 17. , which are brought into sliding contact with both ends of the photoreceptor drum 2. The contact spring 1616 is electrically connected to the copper plate 9 provided on the frame 6.

この実施例においても前述した実施例と同じ効果を得る
ことができる。
In this embodiment as well, the same effects as in the previously described embodiment can be obtained.

なお、ドラム構造体に導電性部材を接触させる形態およ
び導電性部材の数は、前述した実施例に限定されるもの
ではなく、例えば2個の接触ばねの一方を感光体ドラム
に接触し、他方をドラム軸に接触させても良い。ドラム
構造体に接触した導電性部材を装置本体に設けた導電性
部材に接続する形態も実施例に限定されない。
Note that the form in which the conductive members are brought into contact with the drum structure and the number of conductive members are not limited to the above-mentioned embodiments. For example, one of the two contact springs is brought into contact with the photoreceptor drum, and the other is may be brought into contact with the drum shaft. The form in which the conductive member in contact with the drum structure is connected to the conductive member provided on the apparatus main body is not limited to the embodiment.

 2 [発明の効果] 以上説明したように本発明の電子写真装置によれば、ド
ラム構造体の複数箇所に導電性部材が接触するので、い
ずれかの導電性部材とドラム構造体との接触が不安定に
なっても、他の導電性部材とドラム構造体との接触によ
り、ドラム構造体とグランドとの電気的接続を補うため
、ドラム構造体とグランドとの安定した電気的接続を維
持できる。従って、感光体ドラムに電荷が蓄積して不具
合我発生することを防止できる。
2 [Effects of the Invention] As explained above, according to the electrophotographic apparatus of the present invention, since the conductive member comes into contact with a plurality of locations on the drum structure, contact between any of the conductive members and the drum structure is prevented. Even if the drum structure becomes unstable, contact between the drum structure and other conductive members supplements the electrical connection between the drum structure and the ground, so a stable electrical connection between the drum structure and the ground can be maintained. . Therefore, it is possible to prevent problems caused by accumulation of charge on the photoreceptor drum.

【図面の簡単な説明】[Brief explanation of drawings]

第1図および第2図は本発明の電子写真装置の異なる実
施例を示す概略的構成図であ。 1・・・ドラム構造体、2・・感光体ドラム、3・・・
ドラム軸、6・・フレーム、8・・・位置決めピン、9
・・銅板、〕4・・・接触ばね、16・・・接触ばね。 1」」願人代理人 弁理士 鈴江武彦  3
1 and 2 are schematic configuration diagrams showing different embodiments of the electrophotographic apparatus of the present invention. 1... Drum structure, 2... Photosensitive drum, 3...
Drum shaft, 6... Frame, 8... Positioning pin, 9
...Copper plate,]4...Contact spring, 16...Contact spring. 1” Patent attorney Takehiko Suzue 3

Claims (2)

【特許請求の範囲】[Claims] (1)感光体ドラムおよびこの感光体ドラムを支持する
ドラム軸からなるドラム構造体を備えた電子写真装置に
おいて、前記ドラム構造体の複数箇所に静止した導電性
部材が接触され、これら導電性部材は装置本体に設けた
接地回路用導電性部材を介してグランドに接続されてな
ることを特徴とする電子写真装置。
(1) In an electrophotographic apparatus equipped with a drum structure consisting of a photoreceptor drum and a drum shaft supporting the photoreceptor drum, stationary conductive members are brought into contact with a plurality of locations of the drum structure, and these conductive members An electrophotographic apparatus characterized in that the apparatus is connected to a ground via a conductive member for a grounding circuit provided in the apparatus main body.
(2)ドラム構造体のドラム軸がフレームに回転自在に
支承され、このフレームにドラム構造体に接触する複数
の導電性部材が設けられてなる請求項1記載の電子写真
装置。
(2) The electrophotographic apparatus according to claim 1, wherein the drum shaft of the drum structure is rotatably supported by a frame, and the frame is provided with a plurality of conductive members that contact the drum structure.
JP2064420A 1990-03-16 1990-03-16 Electrophotographic device Pending JPH03265881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2064420A JPH03265881A (en) 1990-03-16 1990-03-16 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2064420A JPH03265881A (en) 1990-03-16 1990-03-16 Electrophotographic device

Publications (1)

Publication Number Publication Date
JPH03265881A true JPH03265881A (en) 1991-11-26

Family

ID=13257768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2064420A Pending JPH03265881A (en) 1990-03-16 1990-03-16 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPH03265881A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537189A (en) * 1995-07-03 1996-07-16 Xerox Corporation Printing apparatus which grounds photoreceptor independently of CRU
JP2007058057A (en) * 2005-08-26 2007-03-08 Brother Ind Ltd Developing cartridge, process cartridge and image forming apparatus
JP2009251441A (en) * 2008-04-09 2009-10-29 Brother Ind Ltd Electrophotographic photoreceptor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537189A (en) * 1995-07-03 1996-07-16 Xerox Corporation Printing apparatus which grounds photoreceptor independently of CRU
JP2007058057A (en) * 2005-08-26 2007-03-08 Brother Ind Ltd Developing cartridge, process cartridge and image forming apparatus
JP2009251441A (en) * 2008-04-09 2009-10-29 Brother Ind Ltd Electrophotographic photoreceptor

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