JP2000112200A - Electrophotographic image forming device - Google Patents
Electrophotographic image forming deviceInfo
- Publication number
- JP2000112200A JP2000112200A JP10301679A JP30167998A JP2000112200A JP 2000112200 A JP2000112200 A JP 2000112200A JP 10301679 A JP10301679 A JP 10301679A JP 30167998 A JP30167998 A JP 30167998A JP 2000112200 A JP2000112200 A JP 2000112200A
- Authority
- JP
- Japan
- Prior art keywords
- image forming
- conductive member
- forming apparatus
- electrophotographic
- photosensitive drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 48
- 108091008695 photoreceptors Proteins 0.000 claims description 10
- 230000008878 coupling Effects 0.000 abstract description 88
- 238000010168 coupling process Methods 0.000 abstract description 88
- 238000005859 coupling reaction Methods 0.000 abstract description 88
- 230000000694 effects Effects 0.000 description 6
- 241001272720 Medialuna californiensis Species 0.000 description 4
- 229930182556 Polyacetal Natural products 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 101150042515 DA26 gene Proteins 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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、記録媒体に画像を
形成する電子写真画像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic image forming apparatus for forming an image on a recording medium.
【０００２】[0002]
【従来の技術】感光体ドラムが装置本体のカップリング
凹部と嵌合するカップリング凸部を有し、前記凹部と凸
部とが嵌合して、感光体ドラムを回転させる構成が知ら
れている。2. Description of the Related Art A configuration is known in which a photosensitive drum has a coupling convex portion that fits into a coupling concave portion of an apparatus main body, and the concave portion and the convex portion are fitted to rotate the photosensitive drum. I have.
【０００３】[0003]
【発明が解決しよとする課題】本発明は、記録媒体に画
像を形成する電子写真画像形成装置において、電子写真
感光体の導電性部材に接触し電子写真感光体に滞留する
電荷を画像形成装置本体に逃がすための接点部材の動作
を安定させることができる電子写真画像形成装置を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention relates to an electrophotographic image forming apparatus for forming an image on a recording medium, wherein an electric charge which contacts a conductive member of the electrophotographic photosensitive member and stays in the electrophotographic photosensitive member is formed. An object of the present invention is to provide an electrophotographic image forming apparatus capable of stabilizing the operation of a contact member for releasing to a device main body.
【０００４】[0004]
【課題を解決するための手段】主要な本発明は請求項と
対応する番号を付して示せば以下のとおりである。The main aspects of the present invention are as described below with reference to the claims.
【０００５】本出願に係る第１の発明は記録媒体に画像
を形成するための電子写真画像画像装置において、電子
写真感光体ドラムと、前記電子写真感光体ドラムに帯電
を行うための帯電手段と、前記電子写真感光体ドラムに
形成された潜像を現像するための現像手段と、前記現像
手段によって、前記電子写真感光体ドラムに形成された
トナー像を前記記録媒体に転写するための転写手段と、
前記転写手段によって、前記記録媒体に転写されたトナ
ー像を前記記録媒体に定着するための定着手段と、モー
タと、前記モータの駆動力を伝達するための駆動回転体
と、前記駆動回転体の中央部に設けられた、前記駆動回
転体と一体に回転する断面が複数の角部を有する非円形
のねじれた穴と、前記ねじれた穴の中心に設けられた第
一の導電部材であって、前記画像形成装置の装置本体と
電気的に接続している第一の導電部材と、前記第一の導
電部材を前記駆動回転体の回転方向と交差する方向へ移
動させる移動手段と、前記電子写真感光体ドラムの長手
方向一端に設けられた、前記穴と嵌合する、断面が複数
の角部を有する非円形のねじれた突起と、前記ねじれた
突起の中心に設けられた第二の導電部材であって、前記
電子写真感光体ドラムと電気的に接続している第二の導
電部材と、を有して、前記穴と前記突起とが嵌合した状
態で前記駆動回転体が回転する際に第一の導電部材と第
二の導電部材とが電気的に接続して、前記電子写真感光
体ドラムのアースをとるように構成したことを特徴とす
る電子写真画像形成装置である。According to a first aspect of the present invention, there is provided an electrophotographic image forming apparatus for forming an image on a recording medium, comprising: an electrophotographic photosensitive drum; and charging means for charging the electrophotographic photosensitive drum. Developing means for developing the latent image formed on the electrophotographic photosensitive drum, and transfer means for transferring the toner image formed on the electrophotographic photosensitive drum to the recording medium by the developing means When,
Fixing means for fixing the toner image transferred on the recording medium to the recording medium by the transfer means; a motor; a driving rotator for transmitting a driving force of the motor; A non-circular twisted hole having a plurality of corners, and a first conductive member provided at the center of the twisted hole, the cross-section rotating integrally with the driving rotating body provided at a central portion; A first conductive member electrically connected to a device main body of the image forming apparatus; a moving unit configured to move the first conductive member in a direction intersecting a rotation direction of the driving rotator; A non-circular twisted projection having a plurality of corners in cross section, which fits into the hole and is provided at one longitudinal end of the photoconductor drum; and a second conductive member provided at the center of the twisted projection. A member, wherein the electrophotographic photosensitive member is A second conductive member that is electrically connected to the driving member, and the first conductive member and the second conductive member are rotated when the drive rotor rotates in a state where the hole and the protrusion are fitted to each other. Wherein the conductive member is electrically connected to ground the electrophotographic photosensitive drum.
【０００６】本出願に係る第７の発明はプロセスとリッ
ジを着脱可能で、記録媒体に画像を形成するための電子
写真画像形成装置において、 ａ．モータと、 ｂ．前記モータの駆動力を伝達するための駆動回転体
と、 ｃ．前記駆動回転体の中央部に設けられた、前記駆動回
転体と一体に回転する断面が複数個の角部を有する非円
形のねじれた穴と、前記ねじれた穴の中心に設けられた
第一の導電部材であって、前記画像形成装置の装置本体
と電気的に接続している第一の導電部材と、前記第一の
導電部材を前記駆動回転体の回転方向と交差する方向へ
移動させる移動手段と、 ｄ．電子写真感光体ドラムと、前記電子写真感光体ドラ
ムに作用するプロセス手段と、前記電子写真感光体ドラ
ムの長手方向一端に設けられた、前記穴と嵌合する、断
面が複数個の角部を有する非円形のねじれた突起と、前
記ねじれた突起の中心に設けられた第二の導電部材であ
って、前記電子写真感光体ドラムと電気的に接続してい
る第二の導電部材と、を有するプロセスカートリッジを
取り外し可能に装着するための装着手段と、 ｅ．前記記録媒体を搬送するための搬送手段と、を有し
て、前記プロセスカートリッジが装置本体に装着された
際に、前記突起が前記穴と嵌合した状態で前記駆動回転
体が回転する際に前記第一の導電部材と第二の導電部材
とが電気的に接続して、 前記電子写真感光体ドラムの
アースをとるように構成したことを特徴とする電子写真
画像形成装置である。According to a seventh aspect of the present invention, there is provided an electrophotographic image forming apparatus for detachably attaching a process and a ridge and for forming an image on a recording medium, comprising: a. A motor; b. A driving rotator for transmitting a driving force of the motor; c. A non-circular twisted hole having a plurality of corners and having a cross section that rotates integrally with the drive rotating body, provided at a central portion of the drive rotating body, and a first hole provided at the center of the twisted hole. A first conductive member electrically connected to the apparatus main body of the image forming apparatus, and the first conductive member is moved in a direction intersecting a rotation direction of the driving rotating body. Means of transportation; d. An electrophotographic photoreceptor drum, a process unit acting on the electrophotographic photoreceptor drum, and a plurality of corners having a plurality of cross-sections, which are provided at one longitudinal end of the electrophotographic photoreceptor drum, and which fit into the holes. A non-circular twisted protrusion having, and a second conductive member provided at the center of the twisted protrusion, the second conductive member being electrically connected to the electrophotographic photosensitive drum, Mounting means for removably mounting the process cartridge having the e. Transport means for transporting the recording medium, wherein when the process cartridge is mounted on the apparatus main body, the drive rotator rotates with the projections fitted in the holes. An electrophotographic image forming apparatus, wherein the first conductive member and the second conductive member are electrically connected to each other to ground the electrophotographic photosensitive drum.
【０００７】本出願に係る第１３の発明は、プロセスカ
ートリッジを着脱可能で記録媒体に画像を形成する電子
写真画像形成装置において、 ａ．電子写真感光体と、前記電子写真感光体に作用する
プロセス手段と、前記電子写真感光体の一端に備えられ
た被動側連結部と前記被動側連結部に備えられた電子写
真感光体に導通する導電性部材と、を有するプロセスカ
ートリッジを取り外し可能に装着する装着手段と、 ｂ．モータと、 ｃ．前記モータにより回転駆動されその回転中心線上に
プロセスカートリッジの前記被動側連結部に向って軸方
向に進退して係脱される駆動側連結部を有する回転体
と、 ｄ．前記回転体中を挿通して回転中心線上において、回
転体の回転により回転体に対して軸線方向に往復移動可
能で駆動側連結部を連動して前記導電性部材と接離する
アース接点部材と、 ｅ．前記アース接点部材を前記導電性部材に向って付勢
する付勢手段と、 ｆ．前記記録媒体を搬送するための搬送手段と、を有す
ることを特徴とする電子写真画像形成装置である。According to a thirteenth aspect of the present invention, there is provided an electrophotographic image forming apparatus which detachably attaches a process cartridge and forms an image on a recording medium. An electrophotographic photosensitive member, a process unit acting on the electrophotographic photosensitive member, and a conductive member connected to one end of the electrophotographic photosensitive member and an electrophotographic photosensitive member provided at the driven member. Mounting means for removably mounting a process cartridge having a conductive member; b. A motor; c. A rotating body having a drive-side connection portion which is driven to rotate by the motor and axially moves toward and away from the driven-side connection portion of the process cartridge on its rotation center line and is disengaged; d. An earth contact member that is inserted through the rotating body and on a rotation center line, is capable of reciprocating in the axial direction with respect to the rotating body by rotation of the rotating body, and interlocks with the conductive member in conjunction with a driving-side connecting portion, and , E. Biasing means for biasing the ground contact member toward the conductive member; f. An electrophotographic image forming apparatus, comprising: a conveying unit for conveying the recording medium.
【０００８】[0008]
【発明の実施の形態】以下図面に従って本発明の実施の
形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】〔実施の形態１〕先ず電子写真画像形成装
置の全体を説明する。[First Embodiment] First, an entire electrophotographic image forming apparatus will be described.
【００１０】（電子写真画像形成装置の構成）まず、記
録媒体が給紙されてから画像が形成される手順を説明す
る。図１７は画像形成装置の全体図を示す。図１７にお
いて、給紙カセット１９に積載され加圧ばね１７で持っ
て押し上げられた圧接板２２で先端部側を持ち上げられ
た記録媒体１５（例えば記録紙、ＯＨＰシート、布或い
は薄板等）を給紙ローラー２０によりピックアップし、
分離パッド１８により１枚ずつ分離するとともに画像形
成装置本体３０に送り込む。画像形成装置本体３０に送
り込まれた記録媒体１５は搬送ローラー対２１に搬送さ
れ、レジストローラー対１６のニップに突入した後、ル
ープを作り先端の位置と姿勢が整えられる。(Configuration of Electrophotographic Image Forming Apparatus) First, a procedure for forming an image after a recording medium is fed will be described. FIG. 17 shows an overall view of the image forming apparatus. In FIG. 17, the recording medium 15 (for example, recording paper, OHP sheet, cloth or thin plate) whose leading end is lifted by a pressure contact plate 22 which is loaded on a paper feed cassette 19 and pushed up by a pressure spring 17 is supplied. Pick up by paper roller 20,
The sheet is separated one by one by the separation pad 18 and sent to the image forming apparatus main body 30. The recording medium 15 sent to the image forming apparatus main body 30 is conveyed to the conveying roller pair 21 and enters the nip of the registration roller pair 16, and then forms a loop to adjust the position and posture of the leading end.
【００１１】記録媒体１５の位置、姿勢が整った後、レ
ジストローラー対１６は回転を始め、記録媒体１５が先
端検知手段２３を通過するとコントローラーボード２９
からの画像データをスキャナー２５によりプロセスカー
トリッジ１３に保持された電子写真感光体ドラム（以
下、感光ドラムという）１３ａ上へ画像（潜像）として
書き出すタイミングが決定し、記録媒体１５は画像形成
部へと搬送される。プロセスカートリッジ１３内には、
感光ドラム１３ａ上に形成された画像（潜像）を現像す
るためのトナーが保持されており、該プロセスカートリ
ッジ１３内で帯電ローラ１３ｃによる帯電と前記露光に
よる潜像形成、現像ローラ１３ｄ等の現像手段で潜像を
トナーにより現像された画像は、転写ローラー２４によ
り記録媒体１５に転写される。転写後、記録媒体１５は
定着手段２６に搬送され、ここを通過する際圧力及び熱
を印加され、記録媒体１５上のトナーが定着し、画像形
成が完了する。画像形成後、記録媒体１５は中間排出ロ
ーラー対２７及び排出ローラー対２８により排出トレイ
３０ａに積載される。After the position and posture of the recording medium 15 are adjusted, the registration roller pair 16 starts rotating, and when the recording medium 15 passes through the leading end detecting means 23, the controller board 29 is rotated.
The timing at which the image data from the printer is written as an image (latent image) on an electrophotographic photosensitive drum (hereinafter referred to as a photosensitive drum) 13a held in the process cartridge 13 by the scanner 25 is determined, and the recording medium 15 is sent to the image forming unit. Is conveyed. In the process cartridge 13,
A toner for developing an image (latent image) formed on the photosensitive drum 13a is held. The toner is charged in the process cartridge 13 by the charging roller 13c and the latent image is formed by the exposure, and the developing roller 13d is developed. The image obtained by developing the latent image with the toner by the means is transferred to the recording medium 15 by the transfer roller 24. After the transfer, the recording medium 15 is conveyed to the fixing unit 26, and when passing through the recording medium 15, pressure and heat are applied, the toner on the recording medium 15 is fixed, and the image formation is completed. After the image formation, the recording medium 15 is stacked on the discharge tray 30a by the pair of intermediate discharge rollers 27 and the pair of discharge rollers 28.
【００１２】なお、前述プロセスカートリッジとは、帯
電手段、現像手段またはクリーニング手段と電子写真感
光体ドラムとを一体的にカートリッジ化し、このカート
リッジを画像形成装置本体に対して着脱可能とするもの
である。及び帯電手段、現像手段、クリーニング手段の
少なくとも一つと電子写真感光体ドラムとを一体的にカ
ートリッジ化して画像形成装置本体に着脱可能とするも
のである。更に、少なくとも現像手段と電子写真感光体
ドラムとを一体的にカートリッジ化して画像形成装置本
体に着脱可能とするものをいう。The process cartridge is a cartridge in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive drum are integrally formed into a cartridge, and this cartridge is detachable from the main body of the image forming apparatus. . In addition, at least one of the charging unit, the developing unit, and the cleaning unit and the electrophotographic photosensitive drum are integrally formed as a cartridge so that the cartridge can be detachably attached to the image forming apparatus main body. Further, it means that at least the developing means and the electrophotographic photosensitive drum are integrally formed into a cartridge so as to be detachable from the image forming apparatus main body.
【００１３】画像形成装置本体３０には３０ｂを支点に
回動する開閉部材３１が設けられており、開閉部材３１
を開閉することによりプロセスカートリッジ１３を装置
本体３０のカートリッジ装着手段に着脱することができ
る。なお、このカートリッジ装着手段は装置本体３０の
左右の内壁に設けたガイド部材と、このガイド部材に係
合するプロセスカートリッジのガイドからなる（図示さ
れない）。The image forming apparatus main body 30 is provided with an opening / closing member 31 that rotates about a fulcrum 30b.
By opening and closing, the process cartridge 13 can be attached to and detached from the cartridge mounting means of the apparatus main body 30. The cartridge mounting means includes a guide member provided on the left and right inner walls of the apparatus main body 30 and a guide for a process cartridge engaged with the guide member (not shown).
【００１４】（カップリング手段の形状）次に、画像形
成装置本体３０からプロセスカートリッジ１３へ駆動力
を伝達するためのカップリング手段の形状について説明
する。図１は、プロセスカートリッジ１３に保持された
電子写真感光体である感光ドラム１３ａとそれに駆動を
伝達するための画像形成装置本体３０の駆動部の断面図
である。図１８は図１の斜視図である。夫々の構成につ
いては後で説明する。。(Shape of Coupling Means) Next, the shape of the coupling means for transmitting the driving force from the image forming apparatus main body 30 to the process cartridge 13 will be described. FIG. 1 is a cross-sectional view of a photosensitive drum 13a, which is an electrophotographic photosensitive member held in a process cartridge 13, and a drive unit of an image forming apparatus main body 30 for transmitting a drive thereto. FIG. 18 is a perspective view of FIG. Each configuration will be described later. .
【００１５】図１において、プロセスカートリッジ１３
に取り付けられた感光ドラム１３ａの長手方向一方端部
には、カートリッジカップリング手段が設けてある。こ
のカップリング手段は、感光ドラム１３ａの一方端部に
固着したドラムフランジ１１の先端に被動側連結部とし
てカップリング凸部１１ａを設けたものである。カップ
リング凸部１１ａの形状はねじれた突起であって本例で
は多角柱である。また、前記カップリング凸部１１ａと
係合する画像形成装置本体３０のドラム駆動ギア２の中
心軸２ｃの先端は駆動側連結部であって凹形状になって
おり、断面は多角形の凹部の底面２ｂから先端に向かっ
てわずかにねじれた穴であるカップリング凹部２ａとな
っている。このカップリング凹部２ａを設ける部材が回
転体であり本例ではドラム駆動ギア２となっている。こ
のカップリング凸部１１ａとカップリング凹部２ａはね
じれのピッチが略同一であり、同一方向にねじれてい
る。そのねじれ形状により、カップリング凹部１１ａと
カップリング凸部２ａが係合を開始するとお互いに引き
寄せる方向に力が作用して、凸部端面１１ｂが凹部底面
２ｂと当接する。そこで、ドラム駆動ギア２と感光ドラ
ム１３ａが一体的に回転し、画像形成装置本体３０から
プロセスカートリッジ１３に駆動が伝達される。In FIG. 1, the process cartridge 13
A cartridge coupling means is provided at one end in the longitudinal direction of the photosensitive drum 13a attached to the photosensitive drum 13a. In this coupling means, a coupling convex portion 11a is provided as a driven-side connecting portion at the tip of a drum flange 11 fixed to one end of a photosensitive drum 13a. The shape of the coupling convex portion 11a is a twisted protrusion, which is a polygonal prism in this example. The distal end of the center shaft 2c of the drum drive gear 2 of the image forming apparatus main body 30 which engages with the coupling convex portion 11a is a drive side connecting portion and has a concave shape. The coupling recess 2a is a hole slightly twisted from the bottom surface 2b toward the tip. The member provided with the coupling recess 2a is a rotating body, and in this example, the member is the drum drive gear 2. The coupling convex portion 11a and the coupling concave portion 2a have substantially the same twist pitch and are twisted in the same direction. Due to the twisted shape, when the coupling concave portion 11a and the coupling convex portion 2a start engaging, a force acts in a direction in which the coupling concave portion 11a and the coupling convex portion 2a are attracted to each other, and the convex end face 11b comes into contact with the concave bottom surface 2b. Then, the drum drive gear 2 and the photosensitive drum 13a rotate integrally, and the drive is transmitted from the image forming apparatus main body 30 to the process cartridge 13.
【００１６】一般的にはカップリング凸部１１ａ及びカ
ップリング凹部２ａの断面形状は略正三角形であり、こ
の凸部１１ａのねじれ方向は、感光ドラム１３ａの回転
方向に対し根元から先端に向かって反対方向、この凹部
２ａのねじれ方向は、先端から底面に向かって反対方向
である。凸部１１ａと凹部２ａが係合し、凹部２ａの回
転力が凸部１１ａに伝達される際に略正三角形の凸部１
１ａの各稜線と凹部２ａの内面とが等しく当接するため
お互いに軸心が合致する。以上のことから、このカップ
リング手段は画像形成装置内で軸方向の位置及びラジア
ル方向の位置が安定して決まる。In general, the cross-sectional shapes of the coupling convex portion 11a and the coupling concave portion 2a are substantially equilateral triangles, and the torsion direction of the convex portion 11a is from the root to the tip with respect to the rotation direction of the photosensitive drum 13a. The opposite direction, that is, the twist direction of the concave portion 2a is the opposite direction from the tip to the bottom surface. When the convex portion 11a and the concave portion 2a are engaged with each other and the rotational force of the concave portion 2a is transmitted to the convex portion 11a, the convex portion 1 having a substantially equilateral triangle shape is used.
Since the ridges 1a and the inner surface of the recess 2a abut equally, their axes coincide with each other. From the above, the axial position and the radial position of the coupling unit in the image forming apparatus are stably determined.
【００１７】（ドラムアースの構成）以上のようなカッ
プリング手段を有する画像形成装置本体３０において、
感光ドラム１３ａに滞留する電荷を画像形成装置本体３
０へ逃がすためにドラムアース接点を前記カップリング
凸部１１ａ及び凹部２ａの回転中心部に設けた場合の構
成について説明する。(Configuration of Drum Ground) In the image forming apparatus main body 30 having the above coupling means,
The charge remaining on the photosensitive drum 13a is transferred to the image forming apparatus main body 3
A configuration in which a drum ground contact is provided at the center of rotation of the coupling convex portion 11a and the concave portion 2a in order to escape to zero will be described.
【００１８】まず、プロセスカートリッジ１３の感光ド
ラムアースの構成について説明する。図１にプロセスカ
ートリッジ１３に保持された感光ドラム１３ａの断面が
示されている。図１において、感光ドラム１３ａは長手
方向駆動側端部に前記のドラムフランジ１１と他端部に
ドラムフランジ（Ｒ）３３が固着され、プロセスカート
リッジ枠体１３ｂに回転自在に支持されている。ドラム
フランジ１１の中心穴には導電性部材１２が嵌入され、
導電性部材１２とドラムフランジ１１及び感光ドラム１
３ａは一体的に回転する。導電性部材１２の一方端はド
ラムフランジ１１の凸部端面１１ｂよりも奥側に位置し
ているため、プロセスカートリッジ１３を画像形成装置
本体３０へ着脱する際、及び画像形成装置本体３０から
取り外したプロセスカートリッジ１３を取り扱う際、ア
ース接点が保護される。導電性部材１２の他方端はアー
ス板１４に嵌入して固定されている。アース板１４は端
部に突起を有し、突起が感光ドラム１３ａの内面に弾力
で食い込んでいる。つまり、感光ドラム１３ａと導電性
部材１２はアース板１４を介して電気的に導通してい
る。First, the structure of the photosensitive drum ground of the process cartridge 13 will be described. FIG. 1 shows a cross section of the photosensitive drum 13 a held by the process cartridge 13. In FIG. 1, the photosensitive drum 13a has the drum flange 11 fixed to the longitudinal drive end and the drum flange (R) 33 fixed to the other end, and is rotatably supported by the process cartridge frame 13b. A conductive member 12 is fitted into the center hole of the drum flange 11,
Conductive member 12, drum flange 11, and photosensitive drum 1
3a rotates integrally. Since one end of the conductive member 12 is located behind the protruding end surface 11b of the drum flange 11, the process cartridge 13 is detached from the image forming apparatus main body 30 and is removed from the image forming apparatus main body 30. When handling the process cartridge 13, the ground contact is protected. The other end of the conductive member 12 is fitted and fixed to the ground plate 14. The ground plate 14 has a protrusion at an end, and the protrusion elastically bites into the inner surface of the photosensitive drum 13a. That is, the photosensitive drum 13 a and the conductive member 12 are electrically connected via the ground plate 14.
【００１９】次に、画像形成装置本体３０の感光ドラム
アースの構成について説明する。図１は、プロセスカー
トリッジ１３に保持された感光ドラム１３ａとそれに駆
動を伝達するための画像形成装置本体３０の駆動部の断
面図である。図１において、ドラム駆動ギア２は側板
（Ｒ）３に固定されたモータ１から駆動を伝達される。
もちろん、ドラム駆動ギア２はモータ１からいくつかの
駆動伝達手段を介して駆動されてもよい。ドラム駆動ギ
ア２は中心軸２ｃ，２ｄが側板（Ｒ）３と側板（Ｌ）４
にそれぞれ保持された軸受（Ｒ）５、軸受（Ｌ）６に嵌
合し、画像形成装置本体３０に対して回転自在及び軸方
向移動自在に設けられている。Next, the configuration of the photosensitive drum ground of the image forming apparatus main body 30 will be described. FIG. 1 is a cross-sectional view of the photosensitive drum 13 a held in the process cartridge 13 and a drive unit of the image forming apparatus main body 30 for transmitting a drive thereto. In FIG. 1, the drive of a drum drive gear 2 is transmitted from a motor 1 fixed to a side plate (R) 3.
Of course, the drum drive gear 2 may be driven from the motor 1 via some drive transmission means. The center shafts 2c and 2d of the drum driving gear 2 are composed of a side plate (R) 3 and a side plate (L) 4.
Are fitted to the bearing (R) 5 and the bearing (L) 6 held respectively, and are provided rotatably and axially movable with respect to the image forming apparatus main body 30.
【００２０】ドラム駆動ギア２の中心軸２ｃの先端には
凹部２ａがあり、その断面形状は多角形で凹部底面２ｂ
から軸先端に向かって、ドラム駆動ギア２の回転方向に
わずかにねじれているのは前記の通りである。At the end of the center shaft 2c of the drum drive gear 2, there is a recess 2a, the cross section of which is polygonal, and the bottom 2b of the recess.
Is slightly twisted in the direction of rotation of the drum drive gear 2 from to the shaft tip.
【００２１】ドラム駆動ギア２の軸内部は中空であり、
接点部材８は軸受（Ｌ）６中心に設けられた軸受穴６ａ
とドラム駆動ギア２中心に設けられた穴２ｃ１に嵌合す
ることにより軸方向移動自在に保持されている。接点部
材８は付勢手段９に押圧されているが、接点部材８に設
けた突き当て部としてのつば８ａがドラム駆動ギア２の
受け部である軸内部２ｆに突き当たることにより、ドラ
ム駆動ギア２も感光ドラム１３ａ側に付勢される。The inside of the shaft of the drum drive gear 2 is hollow,
The contact member 8 has a bearing hole 6a provided at the center of the bearing (L) 6.
And a hole 2c1 provided at the center of the drum drive gear 2 so as to be axially movable. The contact member 8 is pressed by the urging means 9, but the flange 8 a as an abutting portion provided on the contact member 8 abuts on the shaft inside 2 f, which is the receiving portion of the drum driving gear 2, so that the drum driving gear 2 Is also urged toward the photosensitive drum 13a.
【００２２】尚、接点部材８は、接点部材８と軸受６の
断面を非円形例えば夫々半月形とした回転止め等の手段
により回転せず、後述の通りドラムフランジ１１に嵌入
された導電性部材１２の端面と接触し摺動するため、接
点部材８の一方先端は略半球形状になっている。また、
中心軸２ｃの中心穴２ｃ１は円筒形であり、接点部材８
の先端部はこの中心穴２ｃ１に滑合している。接点部材
８、付勢手段９及び側板（Ｌ）４は導電性部材であり、
接点部材８と側板（Ｌ）４は電気的に導通している。The contact member 8 does not rotate by means such as a rotation stopper or the like in which the cross sections of the contact member 8 and the bearing 6 are non-circular, for example, each having a half-moon shape. One end of the contact member 8 has a substantially hemispherical shape so as to contact and slide with the end face of the contact member 12. Also,
The center hole 2c1 of the center shaft 2c is cylindrical, and the contact member 8
Is in sliding contact with the center hole 2c1. The contact member 8, the urging means 9 and the side plate (L) 4 are conductive members,
The contact member 8 and the side plate (L) 4 are electrically connected.
【００２３】以上のような構成から、感光ドラム１３ａ
のドラムフランジ１１に嵌入された導電性部材１２と画
像形成装置本体３０の接点部材８が接触すると、感光ド
ラム１３ａは画像形成装置本体３０に対して電気的に導
通し、感光ドラム１３ａに滞留する電荷を画像形成装置
本体３０に逃がすことが可能となる。With the above configuration, the photosensitive drum 13a
When the contact member 8 of the image forming apparatus main body 30 comes into contact with the conductive member 12 fitted into the drum flange 11, the photosensitive drum 13a is electrically connected to the image forming apparatus main body 30 and stays on the photosensitive drum 13a. The charge can be released to the image forming apparatus main body 30.
【００２４】（カップリング手段とアースの関係）次
に、画像形成装置本体３０とプロセスカートリッジ１３
のカップリング動作とドラムアースの関係について説明
する。図１、図２は、本発明の特徴を最もよく表わす図
面であり、夫々カップリング凹部２ａと凸部１１ａが係
合する前の状態と係合を完了した状態を表わす。図２に
おいて、側板（Ｒ）３に固定された軸受（Ｒ）５は軸受
部の外周に凹部を有し、その凹部にはカム７が回転自在
に嵌合している。軸受（Ｒ）５の凹部及びカム７の軸方
向に対向する面はカム面５ａ，７ａである。(Relationship between Coupling Means and Ground) Next, the image forming apparatus main body 30 and the process cartridge 13
The relationship between the coupling operation and the drum ground will be described. FIGS. 1 and 2 show the features of the present invention best, and show a state before the coupling recess 2a and the projection 11a are engaged and a state where the engagement is completed, respectively. In FIG. 2, a bearing (R) 5 fixed to a side plate (R) 3 has a concave portion on the outer periphery of the bearing portion, and a cam 7 is rotatably fitted in the concave portion. The surfaces of the concave portion of the bearing (R) 5 and the surface of the cam 7 that face each other in the axial direction are cam surfaces 5a and 7a.
【００２５】図２０、図２１は、軸受（Ｒ）５とカム７
のカム面（高さＴ）を回転方向（角度θ）に展開したも
のである。尚、カム面の形状はカム７が後述のような動
作をするのであれば、図２０、図２１の通りでなくても
構わない。カム７は回転し軸受（Ｒ）５との位相が変化
することにより、ドラム駆動ギア２をスラスト方向に移
動させ、係合したカップリング凹部２ａと凸部１１ａを
引き離す役割がある。カム７の動作について説明する。FIGS. 20 and 21 show the bearing (R) 5 and the cam 7.
Are developed in the rotation direction (angle θ). The shape of the cam surface need not be as shown in FIGS. 20 and 21 as long as the cam 7 operates as described below. The cam 7 rotates and changes the phase with the bearing (R) 5 to move the drum drive gear 2 in the thrust direction, thereby separating the engaged coupling concave portion 2a and the convex portion 11a. The operation of the cam 7 will be described.
【００２６】図２２、図２３は図２、図１の軸受（Ｒ）
５とカム７を矢印方向から見た図であり、夫々開閉部材
３１を閉めた状態（カップリング手段が係合した状態）
と開閉部材３１を開けた状態（カップリング手段が係合
していない状態）である。FIGS. 22 and 23 show the bearing (R) of FIGS. 2 and 1.
FIG. 5 is a view of the cam 5 and the cam 7 viewed from the direction of the arrow, and shows a state in which the opening / closing member 31 is closed (a state in which the coupling means is engaged).
And a state in which the opening / closing member 31 is opened (a state in which the coupling means is not engaged).
【００２７】図２２において、カム７に設けたアーム７
ｃの先端にはリンク３２が結合され、リンク３２の反対
側の端部は画像形成装置本体３０の開閉部材３１と結合
している。即ち、開閉部材３１の開閉によりリンク３２
を介してカム７が回転する。開閉部材３１が閉まってい
る時、カム７は図２２のような位置にあり、軸受（Ｒ）
５とカム７のカム面の位相は図２０に示す通り夫々の山
と谷が係合している。この時カム端面７ｂの高さＴが最
も小さくなり、図２のようにカム端面７ｂは軸受（Ｒ）
端面５ｂよりも感光ドラム１３ａ側に位置する。In FIG. 22, the arm 7 provided on the cam 7
A link 32 is connected to the leading end of the link c, and the opposite end of the link 32 is connected to the opening / closing member 31 of the image forming apparatus main body 30. That is, by opening and closing the opening and closing member 31, the link 32 is opened.
The cam 7 is rotated via. When the opening / closing member 31 is closed, the cam 7 is at a position as shown in FIG.
The phases of the cam surfaces of the cam 5 and the cam 7 are such that the peaks and valleys are engaged as shown in FIG. At this time, the height T of the cam end face 7b becomes the smallest, and as shown in FIG.
It is located closer to the photosensitive drum 13a than the end face 5b.
【００２８】開閉部材３１を開けると、カム７はリンク
３２の移動により図２３のような位置まで反時計回りに
回転し、カム７のカム面７ａは図２０の状態から図の右
側へ移動し、軸受（Ｒ）５のカム斜面５ａを乗り上げ、
結果として図２１のようなカム面５ａ，７ａの互の山頂
が衝合した位相になる。この時、カム７の端面７ｂの高
さＴが図２１のように最大になることから理解できるよ
うに、図１においてカム７は感光ドラム１３ａから離れ
る方向に移動し、それに伴いドラム駆動ギア２はカム端
面７ｂに押されて、接点部材８と共に付勢手段９の押圧
力に逆らって移動し、ドラム駆動ギア凹部２ａと感光ド
ラム１３ａのカップリング凸部１１ａが完全に離れる。
したがって、プロセスカートリッジ１３の着脱が可能と
なる。When the opening / closing member 31 is opened, the cam 7 rotates counterclockwise to a position as shown in FIG. 23 by the movement of the link 32, and the cam surface 7a of the cam 7 moves from the state of FIG. Rides on the cam slope 5a of the bearing (R) 5,
As a result, the peaks of the cam surfaces 5a and 7a as shown in FIG. At this time, as can be understood from the fact that the height T of the end face 7b of the cam 7 becomes maximum as shown in FIG. 21, the cam 7 moves in a direction away from the photosensitive drum 13a in FIG. Is pressed by the cam end face 7b, moves together with the contact member 8 against the pressing force of the urging means 9, and the drum driving gear concave portion 2a and the coupling convex portion 11a of the photosensitive drum 13a are completely separated.
Therefore, the process cartridge 13 can be attached and detached.
【００２９】プロセスカートリッジ１３を画像形成装置
本体３０に装着し開閉部材３１を閉めると、前記の通り
カム端面７ｂは図２のように軸受（Ｒ）端面５ｂよりも
感光ドラム１３ａ側に移動するため、ドラム駆動ギア２
は接点部材８を介して付勢手段９に押圧され感光ドラム
１３ａに近づく方向に移動する。尚、開閉部材３１を閉
めると開閉検知手段（不図示）がそれを検知し、コント
ローラーボード２９（図１７参照）からの信号で画像形
成装置本体３０のモータ１が一定時間回転するため、モ
ータ１から駆動を伝達されるドラム駆動ギア２は回転し
ながら移動する。そして、断面形状が多角形であるドラ
ム駆動ギア凹部２ａの端面と感光ドラムフランジ凸部端
面１１ｂの位相が合った時点で両者が係合し始める。前
述の通り、カップリング凹部２ａと凸部１１ａのねじれ
により、ドラム駆動ギア２と感光ドラム１３ａの間には
お互いに引き寄せる力が発生する。ドラム駆動ギア２
は、カップリング凹部底面２ｂと感光ドラムフランジ１
１の凸部端面１１ｂが接触するまで引き寄せられて両者
の係合が完了するが、その間に接点部材８の先端がドラ
ムフランジ１１に嵌入された導電性部材１２と接触し、
更に感光ドラム１３ａが回転しているので接触部材８と
導電性部材１２のその接触面で摺動するようになる。When the process cartridge 13 is mounted on the image forming apparatus main body 30 and the opening / closing member 31 is closed, as described above, the cam end face 7b moves closer to the photosensitive drum 13a than the bearing (R) end face 5b as shown in FIG. , Drum drive gear 2
Is pressed by the urging means 9 via the contact member 8 and moves in a direction approaching the photosensitive drum 13a. Incidentally, when the opening / closing member 31 is closed, the opening / closing detecting means (not shown) detects this, and the motor 1 of the image forming apparatus main body 30 rotates for a predetermined time by a signal from the controller board 29 (see FIG. 17). The drum drive gear 2 to which the drive is transmitted moves while rotating. Then, when the phase of the end surface of the drum drive gear concave portion 2a having a polygonal cross-sectional shape matches the phase of the photosensitive drum flange convex portion end surface 11b, they start to be engaged with each other. As described above, due to the twisting of the coupling concave portion 2a and the convex portion 11a, a force for attracting each other is generated between the drum driving gear 2 and the photosensitive drum 13a. Drum drive gear 2
Are the coupling concave bottom surface 2b and the photosensitive drum flange 1
The protrusions 1 are pulled until the end surfaces 11b thereof come into contact with each other, and the engagement between the two is completed. In the meantime, the tip of the contact member 8 comes into contact with the conductive member 12 fitted into the drum flange 11,
Further, since the photosensitive drum 13a is rotating, the photosensitive drum 13a slides on the contact surface between the contact member 8 and the conductive member 12.
【００３０】ここでカップリング連結作動中アース接点
部材８に設けた突き当て部として設けたつば８ａと中心
軸２ｃの内部に前記突き当て部を受ける受け部として設
けた軸内部２ｆは後述の構成を有し、駆動側連結部とし
てカップリング凹部２ｂを有する中心軸２ｃに対しアー
ス接点部材８は軸方向に往復動するものである。Here, the collar 8a provided as an abutting portion provided on the earth contact member 8 during the coupling connection operation and the shaft inside 2f provided as a receiving portion for receiving the abutting portion inside the central shaft 2c are described later. And the ground contact member 8 reciprocates in the axial direction with respect to the center shaft 2c having the coupling concave portion 2b as the drive side connecting portion.
【００３１】接点部材８と導電性部材１２が接触する
と、ドラム駆動ギア２に対して付勢手段９の押圧力が作
用しなくなるため、ドラム駆動ギア２と感光ドラムフラ
ンジ１１に引き込み力が確実に作用してから、接点部材
８と導電性部材１２が接触するようにしなければならな
い。When the contact member 8 and the conductive member 12 come into contact with each other, the pressing force of the urging means 9 does not act on the drum driving gear 2, so that the pulling force is reliably applied to the drum driving gear 2 and the photosensitive drum flange 11. After operation, the contact member 8 and the conductive member 12 must be brought into contact.
【００３２】図１において、Ｘはカップリング凸部端面
１１ｂから導電性部材１２までの深さ、Ｙはカップリン
グ凹部２ａの端面から接点部材８の先端までの距離、Ｚ
はカップリング凹部２ａの深さを表わすが、接点部材８
と導電性部材１２が接触した時（付勢手段９の押圧力が
ドラム駆動ギア２に作用しなくなる時）のカップリング
凹部２ａと凸部１１ａの係合量Ｖは Ｖ＝Ｘ＋Ｙ である。係合量Ｖはなるべく大きくする必要があるが、
確実に接点部材８と導電性部材１２が接触するために
は、 Ｚ＞Ｖ としなければならない。In FIG. 1, X is the depth from the end face 11b of the coupling projection to the conductive member 12, Y is the distance from the end face of the coupling recess 2a to the tip of the contact member 8, and Z is
Represents the depth of the coupling recess 2a.
The amount of engagement V between the coupling concave portion 2a and the convex portion 11a when the conductive member 12 comes into contact with the conductive member 12 (when the pressing force of the urging means 9 stops acting on the drum drive gear 2) is V = X + Y. The engagement amount V needs to be as large as possible,
To ensure that the contact member 8 and the conductive member 12 come into contact, Z> V must be satisfied.
【００３３】カップリング凹部２ａと凸部１１ａの係合
が完了すると、図２のようにドラム駆動ギア２の穴端部
と接点部材８のつば部８ａとの間に隙間が生じる。隙間
量Ｗは、 Ｗ＝Ｚ−Ｖ である。また、このカップリング構成では、前述の通り
画像形成装置本体３０において感光ドラム１３ａの軸方
向の位置及びラジアル方向の位置が安定して決まるた
め、接点部材８が感光ドラムフランジ１１に嵌入された
導電性部材１２に作用する接点圧が安定し、確実に感光
ドラム１３ａに滞留する電荷を画像形成装置本体３０に
逃がすことができる。When the engagement between the coupling concave portion 2a and the convex portion 11a is completed, a gap is formed between the hole end of the drum drive gear 2 and the flange 8a of the contact member 8, as shown in FIG. The gap amount W is W = Z−V. Further, in this coupling configuration, the axial position and the radial position of the photosensitive drum 13a in the image forming apparatus main body 30 are determined stably in the image forming apparatus main body 30 as described above. The contact pressure acting on the conductive member 12 is stabilized, and the electric charge remaining on the photosensitive drum 13a can be surely released to the image forming apparatus main body 30.
【００３４】図１に示すように接点部材８を押圧する付
勢手段９は、一例として側板（Ｌ）４に小ねじ１０で固
定した弾性部材とする。もちろん付勢手段９は導電性部
材であり、接点部材８が電気的に導通するような構成で
あれば圧縮コイルばね等を用いても構わない。また、軸
受６を導電性材質とし、接触部材８上においてつば８ａ
を軸受（Ｌ）６間に圧縮コイルばねを縮設してもよい。
側板（Ｌ）４に保持された軸受（Ｌ）６はドラム駆動ギ
ア２の軸受と接点部材８の軸受を兼ねていて、軸受６の
軸受部穴６ａの断面形状は、接点部材８を回転させずス
ラスト方向移動自在にするために半月形状となってい
る。接点部材８の一方端の断面形状は前記の理由で軸受
部穴６ａに丁度嵌合する半月形状であり、反対側端部は
感光ドラム１３ａに嵌入された導電性部材１２との摺動
抵抗を小さくするような形状（例えば球形状）になって
いる。尚、回転止め手段は前記構成に限らず、半月形状
以外の形状で回転止めにしたり、付勢手段９と固着する
などして回転止めとしても構わない。接点部材８には突
き当て部としてつば８ａが設けられており、ドラム駆動
ギア２の受け部としての軸内部２ｆと接触しているが、
つば８ａとドラム駆動ギア２の軸内部２ｆの対向する面
には夫々段差２ｅ，８ｂが設けてある。As shown in FIG. 1, the urging means 9 for pressing the contact member 8 is, for example, an elastic member fixed to the side plate (L) 4 with a small screw 10. Of course, the urging means 9 is a conductive member, and a compression coil spring or the like may be used as long as the contact member 8 is configured to be electrically conductive. Further, the bearing 6 is made of a conductive material, and the collar 8 a is formed on the contact member 8.
The compression coil spring may be contracted between the bearings (L) 6.
The bearing (L) 6 held by the side plate (L) 4 also serves as the bearing of the drum drive gear 2 and the bearing of the contact member 8. The cross-sectional shape of the bearing hole 6 a of the bearing 6 causes the contact member 8 to rotate. It has a half-moon shape to allow free movement in the thrust direction. The cross-sectional shape of one end of the contact member 8 is a half-moon shape just fitting into the bearing hole 6a for the above-mentioned reason, and the opposite end has a sliding resistance with the conductive member 12 fitted into the photosensitive drum 13a. It is shaped to be small (for example, spherical). Note that the rotation stopping means is not limited to the above-described configuration, and may be a rotation stopping in a shape other than the half-moon shape, or may be fixed to the urging means 9 to stop the rotation. The contact member 8 is provided with a flange 8a as an abutting portion, which is in contact with the shaft inside 2f as a receiving portion of the drum drive gear 2,
Steps 2e and 8b are provided on opposing surfaces of the flange 8a and the shaft inside 2f of the drum drive gear 2, respectively.
【００３５】図１３は接点部材８の斜視図、図１４はド
ラム駆動ギア２の軸内部の斜視図を表わす。図１３、図
１４においてつば８ａに設けた段差８ｂ及び軸内部２ｆ
に設けた段差２ｅの先端は何れも接点部材８、ドラム駆
動ギア中心軸２ｃの半径方向を向いて滑らかな形状例え
ば半径方向に直角な断面形状が円弧形の表面になってい
る。ドラム駆動ギア２が回転すると夫々の段差の位相が
変わり、段差８ｂと段差２ｅの位相が合った時に、接点
部材８は感光ドラム１３ａから遠ざかる方向に段差８
ｂ，２ｅの高さだけ往復動作する。段差８ｂ，２ｅの形
状と数は、つば８ａに対し対向するドラム駆動ギア２の
軸内面２ｆの位相が３６０°変化することによって、少
なくとも１回接点部材８がスラスト方向に往復動作すれ
ば前記の通りでなくてもよい。また、つば８ａ及びドラ
ム駆動ギア２の軸内部に設けた段差２ｅ，８ｂ（本例で
は２ｅ，８ｂは高さが等しい）の高さＵは、図２のよう
にカップリング手段が係合を完了した状態において、接
点部材８が確実に導電性部材１２と接触し、更に接点圧
が安定するようにつば８ａとドラム駆動ギア２の軸内部
の隙間Ｗが Ｗ＞０ となるように設定しなければならない。Ｗの値は前記段
差高さＵを考慮すると、 Ｗ＝Ｚ−（Ｘ＋Ｙ）−Ｕ であるから、Ｕの値は Ｕ＜Ｚ−（Ｘ＋Ｙ） の条件を満足すればよい。FIG. 13 is a perspective view of the contact member 8, and FIG. 14 is a perspective view of the inside of the shaft of the drum drive gear 2. 13 and 14, a step 8b provided in the flange 8a and a shaft inside 2f
The tip of the step 2e provided in each of the contact surfaces 8 and the radial direction of the drum drive gear center shaft 2c has a smooth shape, for example, an arc-shaped surface having a cross section perpendicular to the radial direction. When the drum drive gear 2 rotates, the phase of each step changes. When the phases of the steps 8b and 2e match, the contact member 8 moves the step 8 away from the photosensitive drum 13a.
It reciprocates by the height of b, 2e. The shape and number of the steps 8b and 2e are determined as described above if the contact member 8 reciprocates at least once in the thrust direction by changing the phase of the shaft inner surface 2f of the drum drive gear 2 facing the flange 8a by 360 °. It doesn't have to be. The height U of the steps 8e and 8b (in this example, 2e and 8b are equal in height) provided inside the shaft of the collar 8a and the drum drive gear 2 is determined by the coupling means as shown in FIG. In the completed state, the gap W between the collar 8a and the shaft inside the drum driving gear 2 is set to satisfy W> 0 so that the contact member 8 is securely brought into contact with the conductive member 12 and the contact pressure is further stabilized. There must be. Considering the step height U, the value of W is W = Z− (X + Y) −U, so the value of U may satisfy the condition of U <Z− (X + Y).
【００３６】尚、ドラム駆動ギア２とカップリング凹部
２ａは一体と説明しているが、カップリング凹部２ａが
回転自在でスラスト方向移動自在な回転体であり、更に
ドラム駆動ギア２の駆動をプロセスカートリッジ１３の
感光ドラム１３ａに伝達可能な構成であれば一体でなく
ても構わない。Although the drum drive gear 2 and the coupling recess 2a are described as one body, the coupling recess 2a is a rotatable member that is rotatable and movable in the thrust direction. It is not necessary that the cartridge 13 is integrally formed as long as it can be transmitted to the photosensitive drum 13a of the cartridge 13.
【００３７】開閉部材３１を閉めるとカップリング手段
であるドラム駆動ギアと一体のカップリング凹部２ａと
ドラムフランジのカップリング凸部１１ａが係合を始め
るが、この時ドラム駆動ギア２が回転することにより段
差２ｅ，８ｂの位相が変わり、接点部材８がスラスト方
向に往復動作する。以上のような動作が、接点部材８の
動作を妨げている力を解除するきっかけとなり、接点部
材８及びドラム駆動ギア２がスムーズに感光ドラム１３
ａ側に移動し、接点部材８と導電性部材１２との接触及
びカップリング手段の係合が確実に行われる。When the opening / closing member 31 is closed, the coupling concave portion 2a integral with the drum driving gear as the coupling means starts to engage with the coupling convex portion 11a of the drum flange. At this time, the drum driving gear 2 rotates. As a result, the phases of the steps 2e and 8b change, and the contact member 8 reciprocates in the thrust direction. The operation described above triggers the release of the force obstructing the operation of the contact member 8, and the contact member 8 and the drum driving gear 2 smoothly move the photosensitive drum 13.
The contact member 8 moves to the side a, and the contact between the contact member 8 and the conductive member 12 and the engagement of the coupling means are reliably performed.
【００３８】なお、つば８ａと軸内部２ｆ間には一般的
にいえば端面かム装置のように回転を軸方向の運動に変
換するようなものであれば何れの態様も採用されるもの
である。In general, between the flange 8a and the shaft inside 2f, any mode can be adopted as long as it can convert rotation into axial movement like an end face or a gear device. is there.
【００３９】〔実施の形態２〕実施の形態２を図３、図
４で説明する。図３、図４は夫々カップリング凹部２ａ
と凸部１１ａが係合する前の状態と係合を完了した状態
を表わす。ドラム駆動ギア２の軸内部２ｆの形状が異な
る点を除くと構成は実施の形態１と同じである。軸内部
２ｆには実施の形態１のような段差を設けず、形状を図
３のような滑らかな斜面にすることを特徴とする。[Embodiment 2] Embodiment 2 will be described with reference to FIGS. 3 and 4 show the coupling recess 2a, respectively.
And a state before engagement of the projection 11a and a state where the engagement is completed. The configuration is the same as that of the first embodiment except that the shape of the shaft inside 2f of the drum drive gear 2 is different. A feature is that a step is not provided in the shaft inside 2f as in the first embodiment, and the shape is a smooth slope as shown in FIG.
【００４０】ドラム駆動ギア２が回転すると接点部材８
の段差８ｂは軸内部２ｆ斜面上を摺動するため、接点部
材８はスラスト方向に往復動作する。斜面の形状は、ド
ラム駆動ギア２が一回転する間に少なくとも一回接点部
材８がスラスト方向に往復動作するのであれば任意の形
状でよい。例えば、斜面の一部にフラットな面を設けた
り、曲面であっても構わない。When the drum drive gear 2 rotates, the contact member 8
Since the step 8b slides on the slope 2f inside the shaft, the contact member 8 reciprocates in the thrust direction. The shape of the slope may be any shape as long as the contact member 8 reciprocates in the thrust direction at least once while the drum drive gear 2 makes one rotation. For example, a flat surface may be provided on a part of the slope, or a curved surface may be used.
【００４１】本実施の形態においても、開閉部材３１を
開閉すると実施の形態１と同様に接点部材８及びドラム
駆動ギア２がスムーズに感光ドラム１３ａ側に移動し、
図４のようにカップリング手段の係合が確実に完了する
ことが可能となる。この時接点部材８が確実に導電性部
材１２と接触し、更に接点圧が安定するように、接点部
材つば８ａの突起８ｂと軸内部２ｆ斜面が最も接近する
部分においても隙間Ｗが確保され、夫々が接触しない構
成であるのは実施の形態１と同じである。Also in this embodiment, when the opening and closing member 31 is opened and closed, the contact member 8 and the drum driving gear 2 smoothly move to the photosensitive drum 13a side as in the first embodiment.
As shown in FIG. 4, the engagement of the coupling means can be surely completed. At this time, a gap W is ensured even at a portion where the projection 8b of the contact member flange 8a and the inclined surface 2f of the shaft are closest to each other so that the contact member 8 surely contacts the conductive member 12 and further stabilizes the contact pressure. The configuration in which they do not come into contact with each other is the same as in the first embodiment.
【００４２】尚、本実施の形態では接点部材のつば８ａ
に段差８ｂ、ドラム駆動ギア２の軸内部２ｆに斜面を設
けた構成を説明しているが、反対に軸内部２ｆに段差、
接点部材つば８ａに斜面を設けた構成であっても実施の
形態１と同様の効果が得られる。また、軸内部２ｆ及び
接点部材つば８ａの夫々に斜面を設けても接点部材８は
往復動作するため実施の形態１と同様の効果が得られ
る。In this embodiment, the contact member has a flange 8a.
Is described in which a step 8b and a slope are provided in the shaft inside 2f of the drum drive gear 2. On the contrary, a step is formed in the shaft inside 2f.
The same effect as that of the first embodiment can be obtained even when the contact member flange 8a is provided with a slope. Further, even if a slope is provided on each of the shaft interior 2f and the contact member flange 8a, the same effect as in the first embodiment can be obtained because the contact member 8 reciprocates.
【００４３】〔実施の形態３〕実施の形態３を図５で説
明する。図５はカップリング凹部２ａと凸部１１ａが係
合する前の状態を表わす。構成は実施の形態１，２の構
成に接点部材軸受３４を追加したものである。接点部材
軸受３４には実施の形態１，２のつば８ａと同様につば
３４ａが設けられており、接点部材８に嵌入され一体的
に回転し、ドラム駆動ギア２の軸内部２ｆと摺動する。
この構成では接点部材軸受３４が実施の形態１，２のつ
ば８と同様の役割をはたすので、接点部材８につば８ａ
を設けなくてもよい。接点部材軸受３４は特に導電性部
材である必要はないため、摺動面の摩耗対策として摺動
性のよいポリアセタール等樹脂を使用することも可能で
ある。接点部材軸受３４のつば３４ａと摺動するドラム
駆動ギア２の軸内部２ｆには実施の形態１，２で説明し
た段差または斜面が設けられている。したがって、接点
部材８は実施の形態１と同様の動作をし、同様の効果が
得られる。本実施の形態では、接点部材軸受３４が接点
部材８と、一体的に動作する構成になっているが、図６
のように接点部材軸受３５がドラム駆動ギア２に嵌入さ
れて一体的に回転し、接点部材８と摺動する構成であっ
ても、接点部材つば８ａとそれに対向する接点部材軸受
３５の夫々の面に実施の形態１，２で説明した段差また
は斜面等の端面カム装置を設けることにより実施の形態
１と同様の効果が得られる。Third Embodiment A third embodiment will be described with reference to FIG. FIG. 5 shows a state before the coupling concave portion 2a and the convex portion 11a are engaged. The configuration is obtained by adding a contact member bearing 34 to the configuration of the first or second embodiment. The contact member bearing 34 is provided with a flange 34a similarly to the flange 8a of the first and second embodiments, is fitted into the contact member 8, rotates integrally, and slides with the shaft inside 2f of the drum drive gear 2. .
In this configuration, the contact member bearing 34 plays a role similar to that of the collar 8 of the first and second embodiments.
May not be provided. Since the contact member bearing 34 does not need to be a particularly conductive member, it is possible to use a resin such as polyacetal having good slidability as a measure against wear of the sliding surface. The step or the slope described in the first and second embodiments is provided in the shaft inside 2f of the drum drive gear 2 that slides on the collar 34a of the contact member bearing 34. Therefore, the contact member 8 operates in the same manner as in the first embodiment, and the same effect is obtained. In this embodiment, the contact member bearing 34 is configured to operate integrally with the contact member 8.
Even when the contact member bearing 35 is fitted into the drum drive gear 2 to rotate integrally with the drum drive gear 2 and slides with the contact member 8 as described above, each of the contact member flange 8a and the contact member bearing 35 opposed thereto is provided. By providing the end face cam device such as the step or the slope described in the first and second embodiments on the surface, the same effect as in the first embodiment can be obtained.
【００４４】〔実施の形態４〕実施の形態４を図７、図
８で説明する。図７、図８は夫々カップリング凹部２ａ
と凸部１１ａが係合する前の状態と係合を完了した状態
を表わす。構成は実施の形態１と同じであるが、接点部
材８とドラム駆動ギア２の軸内部２ｆの形状が異なる。
図１５は接点部材８の斜視図であり、図１５のようにつ
ば８ａの外周部に突起８ｃを設けたことを特徴とする。
図１６はドラム駆動ギア２の軸内部２ｆの斜視図であ
り、実施の形態１と同様の段差２ｅを設けているが、図
１５の接点部材つば８ａの直径をφＤとすると図１６の
ように段差２ｅが直径φＤよりも外側に位置することを
特徴とする。図７のようにカップリング手段が係合する
前の状態において、ドラム駆動ギア２が回転すると接点
部材８の突起８ｃと軸内部段差２ｅの位相が変わり、位
相があった時に突起８ｃが段差２ｅを乗り越えるため接
点部材８が感光ドラム１３ａから遠ざかる方向に移動
し、その後に感光ドラム１３ａに近よるように往復動作
する。したがって、実施の形態１と同様に接点部材８及
びドラム駆動ギア２がスムーズに感光ドラム１３ａ側に
移動し、図８のようにカップリング手段の係合が確実に
完了することが可能となる。この時接点部材８が確実に
導電性部材１２と接触し、更に接点圧が安定するよう
に、接点部材つば８ａと軸内部段差２ｅの間には隙間Ｗ
が確保され、夫々が接触しない構成であるのは実施の形
態１と同じである。[Embodiment 4] Embodiment 4 will be described with reference to FIGS. 7 and 8 show the coupling recess 2a, respectively.
And a state before engagement of the projection 11a and a state where the engagement is completed. Although the configuration is the same as that of the first embodiment, the shapes of the contact member 8 and the shaft inside 2f of the drum drive gear 2 are different.
FIG. 15 is a perspective view of the contact member 8, which is characterized in that a protrusion 8c is provided on the outer peripheral portion of the collar 8a as shown in FIG.
FIG. 16 is a perspective view of the shaft inside 2f of the drum drive gear 2 and has a step 2e similar to that of the first embodiment. However, if the diameter of the contact member flange 8a in FIG. The step 2e is located outside the diameter φD. When the drum drive gear 2 rotates in a state before the coupling means is engaged as shown in FIG. 7, the phase of the projection 8c of the contact member 8 and the step 2e inside the shaft changes, and when there is a phase, the projection 8c becomes the step 2e. The contact member 8 moves in a direction away from the photosensitive drum 13a, and then reciprocates to approach the photosensitive drum 13a. Accordingly, the contact member 8 and the drum drive gear 2 smoothly move toward the photosensitive drum 13a as in the first embodiment, and the engagement of the coupling means can be reliably completed as shown in FIG. At this time, a gap W is provided between the contact member flange 8a and the shaft inner step 2e so that the contact member 8 is securely brought into contact with the conductive member 12 and the contact pressure is stabilized.
Are secured, and are not in contact with each other, as in the first embodiment.
【００４５】〔実施の形態５〕実施の形態５を図９、図
１０で説明する。図９、図１０は夫々カップリング凹部
２ａと凸部１１ａが係合する前の状態と係合を完了した
状態を表わす。構成は実施の形態４と同じであるが、ド
ラム駆動ギア２の軸内部２ｆの形状が異なる。軸内部２
ｆには実施の形態４のような段差を設けず、形状を図９
のような滑らかな斜面にすることを特徴とする。ドラム
駆動ギア２が回転すると接点部材８のつば８ａが軸内部
２ｆの斜面上を摺動するが、位相によってこの斜面と接
触するつば８ａの位置が図１５のφＤ部である時と突起
８ｃ部である時が存在する。斜面である軸内部２ｆと突
起８ｃ部が接触する時、接点部材８は感光ドラム１３ａ
から遠ざかる方向に往復動作する。したがって、実施の
形態１と同様に接点部材８及びドラム駆動ギア２がスム
ーズに感光ドラム１３ａ側に移動し、図１０のようにカ
ップリング手段の係合が確実に完了することが可能とな
る。この時接点部材８が確実に導電性部材１２と接触
し、更に接点圧が安定するように、接点部材つば８ａの
突起８ｃと軸内部２ｆの斜面が最も接近する部分におい
ても隙間Ｗが確保され、夫々接触しない構成であるのは
実施の形態１と同じである。尚、軸内部２ｆの斜面の形
状は実施の形態２と同様で、ドラム駆動ギア２が一回転
する間に少なくとも一回接点部材８がスラスト方向に往
復動作するのであれば任意の形状でよい。[Fifth Embodiment] A fifth embodiment will be described with reference to FIGS. 9 and 10 show a state before the coupling concave portion 2a and the convex portion 11a are engaged and a state where the coupling is completed. Although the configuration is the same as that of the fourth embodiment, the shape of the shaft inside 2f of the drum drive gear 2 is different. Inside shaft 2
FIG. 9 f does not have a step as in the fourth embodiment, and
It is characterized by having a smooth slope like. When the drum driving gear 2 rotates, the collar 8a of the contact member 8 slides on the slope of the shaft inside 2f. When the position of the collar 8a that contacts the slope is phase φD in FIG. There is a time that is. When the inside of the shaft 2f, which is a slope, comes into contact with the projection 8c, the contact member 8 is moved to the photosensitive drum 13a.
Reciprocate in the direction away from Therefore, as in the first embodiment, the contact member 8 and the drum driving gear 2 move smoothly toward the photosensitive drum 13a, and the engagement of the coupling means can be reliably completed as shown in FIG. At this time, a gap W is ensured even at a portion where the projection 8c of the contact member flange 8a and the inclined surface of the shaft interior 2f are closest to each other so that the contact member 8 comes into contact with the conductive member 12 more stably. , Respectively, are the same as in the first embodiment. The shape of the slope of the shaft inside 2f is the same as that of the second embodiment, and any shape may be used as long as the contact member 8 reciprocates in the thrust direction at least once while the drum drive gear 2 makes one rotation.
【００４６】〔実施の形態６〕実施の形態６を図１１で
説明する。図１１はカップリング凹部２ａと凸部１１ａ
が係合する前の状態を表わす。構成は実施の形態４，５
の構成に接点部材軸受３４を追加したものである。接点
部材軸受３４には実施の形態４，５のつば８ａと同様に
径方向外側に向って突起３４ｂが設けられており、接点
部材８に嵌入され一体的に回転し、ドラム駆動ギア２の
軸内部２ｆと摺動する。この構成では接点部材軸受３４
が実施の形態４，５のつば８ａと同様の役割を果たすの
で、接点部材８につば８ａを設けなくてもよい。接点部
材軸受３４は特に導電性部材である必要はないため、摺
動面の摩耗対策として摺動性のよいポリアセタール等樹
脂を使用することも可能である。ドラム駆動ギア２の軸
内部２ｆには実施の形態４，５で説明した段差（図示）
または斜面が設けられている。したがって、接点部材８
は実施の形態４，５と同様の動作をし、同様の効果が得
られる。[Sixth Embodiment] A sixth embodiment will be described with reference to FIG. FIG. 11 shows a coupling concave portion 2a and a convex portion 11a.
Represents the state before engaging. The configuration is the same as that of the fourth and fifth embodiments.
In this configuration, a contact member bearing 34 is added. The contact member bearing 34 is provided with a projection 34b directed radially outward similarly to the flange 8a of the fourth and fifth embodiments, and is fitted into the contact member 8 and rotates integrally therewith. It slides with the inside 2f. In this configuration, the contact member bearing 34
Plays the same role as the flange 8a of the fourth and fifth embodiments, so that the contact member 8 does not need to be provided with the collar 8a. Since the contact member bearing 34 does not need to be a particularly conductive member, it is possible to use a resin such as polyacetal having good slidability as a measure against wear of the sliding surface. The step (illustration) described in the fourth and fifth embodiments is provided in the shaft inside 2f of the drum drive gear 2.
Alternatively, a slope is provided. Therefore, the contact member 8
Performs the same operation as in the fourth and fifth embodiments, and achieves the same effect.
【００４７】本実施の形態では、接点部材軸受３４が接
点部材８と一体的に動作する構成になっているが、図１
２のように接点部材軸受３５がドラム駆動ギア２に嵌入
され一体的に回転し、接点部材８と摺動する構成であっ
ても、接点部材つば８ａを実施の形態４，５で説明した
形状にし、それに対向する接点部材軸受３５の摺動面に
実施の形態４，５で説明した段差（図示）または斜面を
設けることにより実施の形態１と同様の効果が得られ
る。In this embodiment, the contact member bearing 34 is configured to operate integrally with the contact member 8.
2, even if the contact member bearing 35 is fitted into the drum drive gear 2 and integrally rotates and slides with the contact member 8, the contact member flange 8a has the same shape as that described in the fourth and fifth embodiments. The same effect as in the first embodiment can be obtained by providing the step (illustration) or the slope described in the fourth and fifth embodiments on the sliding surface of the contact member bearing 35 opposed thereto.
【００４８】上述した実施の形態をまとめると次のとお
りとなる。先ず、記録媒体１５に画像を形成するための
電子写真画像画像装置において、電子写真感光体ドラム
１３ａと、前記電子写真感光体ドラム１３ａに帯電を行
うための帯電手段としての帯電ローラ１３ｃと、前記電
子写真感光体ドラム１３ａに形成された潜像を現像する
ための現像手段としての現像ローラ１３ｄと、前記現像
手段１３ｄによって、前記電子写真感光体ドラム１３ａ
に形成されたトナー像を前記記録媒体１５に転写するた
めの転写手段としての転写ローラ２４と、前記転写手段
２４によって、前記記録媒体１５に転写されたトナー像
を前記記録媒体１５に定着するための定着手段２６と、
モータ１と、前記モータ１の駆動力を伝達するための駆
動回転体としてのドラム駆動ギア２と、前記駆動回転体
２の中央部に設けられた、前記駆動回転体２と一体に回
転する断面が複数の角部を有する非円形のねじれた穴で
あるカップリング凹部２ａと、前記ねじれた穴２ａの中
心に設けられた第一の導電部材である接点部材８であっ
て、前記画像形成装置の装置本体と電気的に接続してい
る第一の導電部材８と、前記第一の導電部材８を前記駆
動回転体２の回転方向と交差する方向へ移動させる移動
手段である段差２ｅ、８ｂ及び付勢手段９と、前記電子
写真感光体ドラム１３ａの長手方向一端に設けられた、
前記穴２ａと嵌合する、断面が複数の角部を有する非円
形のねじれた突起であるカップリング凸部１１ａと、前
記ねじれた突起１１ａの中心に設けられた第二の導電部
材１２であって、前記電子写真感光体ドラム１３ａと電
気的に接続している第二の導電部材１２と、を有して、
前記穴と前記突起とが嵌合した状態で前記駆動回転体が
回転する際に第一の導電部材８と第二の導電部材１２と
が電気的に接続して、前記電子写真感光体ドラムのアー
スをとるように構成した電子写真画像形成装置である。The above embodiments are summarized as follows. First, in an electrophotographic image forming apparatus for forming an image on the recording medium 15, an electrophotographic photosensitive drum 13a, a charging roller 13c as a charging unit for charging the electrophotographic photosensitive drum 13a, A developing roller 13d as developing means for developing a latent image formed on the electrophotographic photosensitive drum 13a; and the electrophotographic photosensitive drum 13a
A transfer roller 24 as a transfer unit for transferring the toner image formed on the recording medium 15 to the recording medium 15, and fixing the toner image transferred to the recording medium 15 to the recording medium 15 by the transfer unit 24. Fixing means 26,
A motor 1, a drum driving gear 2 as a driving rotator for transmitting a driving force of the motor 1, and a cross-section provided at a central portion of the driving rotator 2 and integrally rotating with the driving rotator 2. Are a coupling concave portion 2a which is a non-circular twisted hole having a plurality of corners, and a contact member 8 which is a first conductive member provided at the center of the twisted hole 2a. A first conductive member 8 electrically connected to the apparatus main body of the first embodiment, and steps 2e and 8b serving as moving means for moving the first conductive member 8 in a direction intersecting the rotation direction of the driving rotator 2. And an urging means 9 provided at one longitudinal end of the electrophotographic photosensitive drum 13a.
A coupling projection 11a, which is a non-circular twisted projection having a plurality of corners in cross section, which fits into the hole 2a; and a second conductive member 12 provided at the center of the twisted projection 11a. And a second conductive member 12 electrically connected to the electrophotographic photosensitive drum 13a.
The first conductive member 8 and the second conductive member 12 are electrically connected when the drive rotating body rotates in a state where the holes and the projections are fitted, and the electrophotographic photosensitive drum is rotated. This is an electrophotographic image forming apparatus configured to be grounded.
【００４９】また上記において前記移動手段は、前記ね
じれた穴２ａとねじれた突起１１ａとが嵌合する前に、
前記第一の導電部材８をスラスト方向へ移動させる電子
写真画像形成装置である。Further, in the above, the moving means moves before the twisted hole 2a and the twisted projection 11a are fitted.
This is an electrophotographic image forming apparatus that moves the first conductive member 8 in a thrust direction.
【００５０】次に、またプロセスとリッジ１３を着脱可
能で、記録媒体１５に画像を形成するための電子写真画
像形成装置において、 ａ．モータ１と、 ｂ．前記モータ１の駆動力を伝達するための駆動回転体
としてのドラム駆動ギア２と、 ｃ．前記駆動回転体２の中央部に設けられた、前記駆動
回転体２と一体に回転する断面が複数個の角部を有する
非円形のねじれた穴であるカップリング凹部２ａと、前
記ねじれた穴２ａの中心に設けられた第一の導電部材で
ある接点部材８であって、前記画像形成装置の装置本体
と電気的に接続している第一の導電部材８と、前記第一
の導電部材８を前記駆動回転体２の回転方向と交差する
方向へ移動させる移動手段である段差２ｅ、８ｂ及び付
勢手段９と、 ｄ．電子写真感光体ドラム１３ａと、前記電子写真感光
体ドラム１３ａに作用するプロセス手段である帯電ロー
ラ１３ｃ、現像ローラ１３ｄ等と、前記電子写真感光体
ドラム１３ａの長手方向一端に設けられた、前記穴２ａ
と嵌合する、断面が複数個の角部を有する非円形のねじ
れた突起であるカップリング凸部１１ａと、前記ねじれ
た突起１１ａの中心に設けられた第二の導電部材１２で
あって、前記電子写真感光体ドラム１３ａと電気的に接
続している第二の導電部材１２と、を有するプロセスカ
ートリッジ１３を取り外し可能に装着するための装着手
段と、 ｅ．前記記録媒体１５を搬送するための搬送手段１６，
２０，２１，２４，２７，２８等と、を有して、前記プ
ロセスカートリッジ１３が装置本体３０に装着された際
に、前記突起１１ａが前記穴２ａと嵌合した状態で前記
駆動回転体２が回転する際に前記第一の導電部材８と第
二の導電部材とが電気的に接続して、前記電子写真感光
体ドラム１３ａのアースをとるように構成した電子写真
画像形成装置である。Next, in the electrophotographic image forming apparatus for forming an image on the recording medium 15 in which the process and the ridge 13 are detachable, a. A motor 1; b. A drum driving gear 2 as a driving rotating body for transmitting a driving force of the motor 1, c. A coupling recessed portion 2a provided at a center portion of the driving rotator 2, the coupling recess 2a being a non-circular twisted hole having a plurality of corners and rotating integrally with the driving rotator 2, and the twisted hole; A contact member 8, which is a first conductive member provided at the center of 2a, the first conductive member 8 being electrically connected to the apparatus main body of the image forming apparatus; and the first conductive member Steps 2e, 8b and urging means 9, which are moving means for moving the driving rotator 8 in a direction intersecting the rotation direction of the driving rotator 2, d. An electrophotographic photosensitive drum 13a; a charging roller 13c, a developing roller 13d, etc., which are process means acting on the electrophotographic photosensitive drum 13a; and a hole provided at one longitudinal end of the electrophotographic photosensitive drum 13a. 2a
A coupling projection 11a, which is a non-circular twisted projection having a plurality of corners in cross section, and a second conductive member 12 provided at the center of the twisted projection 11a, Mounting means for removably mounting the process cartridge 13 having the second conductive member 12 electrically connected to the electrophotographic photosensitive drum 13a; e. Conveying means 16 for conveying the recording medium 15,
20, 21, 24, 27, 28, etc., when the process cartridge 13 is mounted in the apparatus main body 30, the drive rotator 2 is mounted in a state where the protrusion 11 a is fitted into the hole 2 a. An electrophotographic image forming apparatus is configured such that the first conductive member 8 and the second conductive member are electrically connected to each other when the rotating member rotates to ground the electrophotographic photosensitive drum 13a.
【００５１】また、ここにおいて、前に移動手段は前記
ねじれた穴２ａと、ねじれた突起１１ａとが嵌合する前
に第一の導電部材８をスラスト方向へ移動させる。Here, the moving means moves the first conductive member 8 in the thrust direction before the twisted hole 2a and the twisted protrusion 11a are fitted.
【００５２】また、前述した実施の形態では感光体ドラ
ムや現像ローラをカートリッジ化し、このプロセスカー
トリッジを装着して画像を形成する装置を例示した。し
かしながら、これら感光体ドラムや現像ローラをカート
リッジ化することなく、装置本体に直接取り付けた画像
形成装置にも、本発明は同様に適用し得るものである。In the above-described embodiment, the photosensitive drum and the developing roller are formed into cartridges, and the process cartridge is mounted thereon to form an image. However, the present invention can be similarly applied to an image forming apparatus directly attached to the apparatus main body without forming the photosensitive drum and the developing roller into a cartridge.
【００５３】[0053]
【発明の効果】以上説明したように、本発明によれば、
プロセスカートリッジの電子写真感光体を駆動するため
の駆動側連結部を有する回転体と、回転体の回転中心の
穴に嵌合し電子写真感光体の導電性部材に接触すること
によって電子写真感光体に滞留する電荷を画像形成装置
本体に逃がすための接点部材と、前記接点部材を介し前
記回転体をプロセスカートリッジ側に押圧するための付
勢手段を有し、前記回転体とプロセスカートリッジの電
子写真感光体に固着した回転体の駆動側連結部が係合を
完了するまでの間、前記接点部材をスラスト方向に往復
動作させ駆動側連結部材と電子写真感光体の被動側連結
部との係合不良を防ぐことが可能となる。As described above, according to the present invention,
A rotator having a drive-side connecting portion for driving the electrophotographic photosensitive member of the process cartridge; and an electrophotographic photosensitive member which is fitted into a hole at the center of rotation of the rotator and contacts a conductive member of the electrophotographic photosensitive member. A contact member for letting the electric charge staying in the image forming apparatus main body escape to the image forming apparatus main body; and an urging means for pressing the rotating body toward the process cartridge via the contact member. Until the driving-side connecting portion of the rotating body fixed to the photoreceptor completes the engagement, the contact member is reciprocated in the thrust direction to engage the driving-side connecting member with the driven-side connecting portion of the electrophotographic photoreceptor. Defects can be prevented.
【図１】本発明の実施の形態１に係わるカップリング手
段を説明する縦断面図（係合前）である。FIG. 1 is a longitudinal sectional view (before engagement) illustrating a coupling unit according to a first embodiment of the present invention.
【図２】本発明の実施の形態１に係わるカップリング手
段を説明する縦断面図（係合後）である。FIG. 2 is a longitudinal sectional view (after engagement) illustrating a coupling unit according to the first embodiment of the present invention.
【図３】本発明の実施の形態２に係わるカップリング手
段を説明する縦断面図（係合前）である。FIG. 3 is a longitudinal sectional view (before engagement) illustrating a coupling means according to a second embodiment of the present invention.
【図４】本発明の実施の形態２に係わるカップリング手
段を説明する縦断面図（係合後）である。FIG. 4 is a longitudinal sectional view (after engagement) illustrating a coupling unit according to a second embodiment of the present invention.
【図５】本発明の実施の形態３に係わるカップリング手
段を説明する縦断面図（係合前）である。FIG. 5 is a longitudinal sectional view (before engagement) illustrating a coupling unit according to a third embodiment of the present invention.
【図６】本発明の実施の形態３に係わるカップリング手
段を説明する縦断面図（係合後）である。FIG. 6 is a longitudinal sectional view (after engagement) illustrating a coupling unit according to a third embodiment of the present invention.
【図７】本発明の実施の形態４に係わるカップリング手
段を説明する縦断面図（係合前）である。FIG. 7 is a longitudinal sectional view (before engagement) illustrating a coupling unit according to a fourth embodiment of the present invention.
【図８】本発明の実施の形態４に係わるカップリング手
段を説明する縦断面図（係合後）である。FIG. 8 is a longitudinal sectional view (after engagement) illustrating a coupling unit according to a fourth embodiment of the present invention.
【図９】本発明の実施の形態５に係わるカップリング手
段を説明する縦断面図（係合前）である。FIG. 9 is a longitudinal sectional view (before engagement) illustrating a coupling means according to a fifth embodiment of the present invention.
【図１０】本発明の実施の形態５に係わるカップリング
手段を説明する縦断面図（係合後）である。FIG. 10 is a longitudinal sectional view (after engagement) illustrating a coupling means according to a fifth embodiment of the present invention.
【図１１】本発明の実施の形態６に係わるカップリング
手段を説明する縦断面図である。FIG. 11 is a longitudinal sectional view illustrating a coupling unit according to a sixth embodiment of the present invention.
【図１２】本発明の実施の形態６に係わるカップリング
手段を説明する縦断面図である。FIG. 12 is a longitudinal sectional view illustrating a coupling unit according to a sixth embodiment of the present invention.
【図１３】本発明の実施の形態１に係わる接点部材の斜
視図である。FIG. 13 is a perspective view of a contact member according to Embodiment 1 of the present invention.
【図１４】本発明の実施の形態１に係わるドラム駆動ギ
ア軸の内部の斜視図である。FIG. 14 is a perspective view of the inside of the drum drive gear shaft according to the first embodiment of the present invention.
【図１５】本発明の実施の形態４に係わる接点部材の斜
視図である。FIG. 15 is a perspective view of a contact member according to Embodiment 4 of the present invention.
【図１６】本発明の実施の形態４に係るドラム駆動ギア
軸の内部の斜視図である。FIG. 16 is a perspective view of the inside of a drum drive gear shaft according to Embodiment 4 of the present invention.
【図１７】画像形成装置全体を示す模式図である。FIG. 17 is a schematic diagram illustrating the entire image forming apparatus.
【図１８】図１のカップリング手段を説明する斜視図で
ある。FIG. 18 is a perspective view illustrating the coupling means of FIG. 1;
【図１９】駆動回転体とカップリングの正面図である。FIG. 19 is a front view of a driving rotating body and a coupling.
【図２０】カム面高さを回転方向に展開した展開図（係
合後）である。FIG. 20 is a development view (after engagement) in which the cam surface height is developed in the rotation direction.
【図２１】カム面高さを回転方向に展開した展開図（係
合前）である。FIG. 21 is a development view (before engagement) in which a cam surface height is developed in a rotation direction.
【図２２】カムとリンクの位置を説明する側面図（係合
後）である。FIG. 22 is a side view (after engagement) illustrating the positions of the cam and the link.
【図２３】カムとリンクの位置を説明する側面図（係合
後）である。FIG. 23 is a side view (after engagement) illustrating the positions of the cam and the link.
１…モータ ２…ドラム駆動ギア ２ａ…カップリング凹部 ２ｂ…
カップリング凹部底面２ｃ…ドラム駆動ギア中心軸 ２
ｃ１…穴 ２ｄ…ドラム駆動ギア中心軸 ２ｅ…段差
２ｆ…軸内部 ３…側板（Ｒ） ４…側板（Ｌ） ５…軸受（Ｒ） ５ａ…カム面 ５ｂ…軸受端面 ６…軸受（Ｌ） ６ａ…軸受穴 ７…カム ７ａ…カム面 ７ｂ…カム端面 ７ｃ…アー
ム ８…接点部材 ８ａ…つば ８ｂ…段差 ８ｃ…突起 ９…付勢手段 １０…小ねじ １１…ドラムフランジ １１ａ…カップリング凸部 １
１ｂ…カップリング凸部端面 １２…導電性部材 １３…プロセスカートリッジ １３ａ…感光ドラム １
３ｂ…プロセスカートリッジ枠体 １３ｃ…帯電ローラ
１３ｄ…現像 １４…アース板 １５…記録媒体 １６…レジストローラ対 １７…加圧ばね １８…分離パッド １９…給紙カセット ２０…給紙ローラー ２１…搬送ローラー対 ２２…圧接板 ２３…先端検知手段 ２４…転写ローラー ２５…スキャナー ２６…定着手段 ２７…中間排出ローラー対 ２８…排出ローラー対 ２９…コントローラーボード ３０…画像形成装置本体 ３０ａ…排出トレイ ３０ｂ
…支点 ３１…開閉部材 ３２…リンク ３３…ドラムフランジ（Ｒ） ３４…接点部材軸受 ３４ａ…つば ３４ｂ…突起 ３５…接点部材軸受DESCRIPTION OF SYMBOLS 1 ... Motor 2 ... Drum drive gear 2a ... Coupling recess 2b ...
Coupling concave bottom surface 2c: Drum drive gear center shaft 2
c1: Hole 2d: Drum drive gear center axis 2e: Step
2f: Inside the shaft 3: Side plate (R) 4: Side plate (L) 5: Bearing (R) 5a: Cam surface 5b: Bearing end surface 6: Bearing (L) 6a: Bearing hole 7: Cam 7a: Cam surface 7b: Cam End face 7c Arm 8 Contact member 8a Collar 8b Step 8c Projection 9 Biasing means 10 Machine screw 11 Drum flange 11a Coupling projection 1
1b: Coupling convex end face 12: Conductive member 13: Process cartridge 13a: Photosensitive drum 1
3b: Process cartridge frame 13c: Charging roller 13d: Development 14: Ground plate 15: Recording medium 16: Registration roller pair 17: Pressure spring 18: Separation pad 19: Paper feed cassette 20: Paper feed roller 21: Transport roller pair DESCRIPTION OF SYMBOLS 22 ... Pressure contact plate 23 ... Tip detection means 24 ... Transfer roller 25 ... Scanner 26 ... Fixing means 27 ... Intermediate discharge roller pair 28 ... Discharge roller pair 29 ... Controller board 30 ... Image forming apparatus main body 30a ... Discharge tray 30b
... Support point 31 ... Opening / closing member 32 ... Link 33 ... Drum flange (R) 34 ... Contact member bearing 34a ... Collar 34b ... Protrusion 35 ... Contact member bearing
フロントページの続き Ｆターム(参考） 2H035 CB04 CZ01 2H071 BA20 CA02 DA06 DA08 DA09 DA15 DA26 DA34 Continued on the front page F-term (reference) 2H035 CB04 CZ01 2H071 BA20 CA02 DA06 DA08 DA09 DA15 DA26 DA34
Claims (18)
真画像画像装置において、 電子写真感光体ドラムと、 前記電子写真感光体ドラムに帯電を行うための帯電手段
と、 前記電子写真感光体ドラムに形成された潜像を現像する
ための現像手段と、 前記現像手段によって、前記電子写真感光体ドラムに形
成されたトナー像を前記記録媒体に転写するための転写
手段と、 前記転写手段によって、前記記録媒体に転写されたトナ
ー像を前記記録媒体に定着するための定着手段と、 モータと、 前記モータの駆動力を伝達するための駆動回転体と、 前記駆動回転体の中央部に設けられた、前記駆動回転体
と一体に回転する断面が複数の角部を有する非円形のね
じれた穴と、 前記ねじれた穴の中心に設けられた第一の導電部材であ
って、前記画像形成装置の装置本体と電気的に接続して
いる第一の導電部材と、 前記第一の導電部材を前記駆動回転体の回転方向と交差
する方向へ移動させる移動手段と、 前記電子写真感光体ドラムの長手方向一端に設けられ
た、前記穴と嵌合する、断面が複数の角部を有する非円
形のねじれた突起と、 前記ねじれた突起の中心に設けられた第二の導電部材で
あって、前記電子写真感光体ドラムと電気的に接続して
いる第二の導電部材と、 を有して、 前記穴と前記突起とが嵌合した状態で前記駆動回転体が
回転する際に第一の導電部材と第二の導電部材とが電気
的に接続して、前記電子写真感光体ドラムのアースをと
るように構成したことを特徴とする電子写真画像形成装
置。1. An electrophotographic image forming apparatus for forming an image on a recording medium, comprising: an electrophotographic photosensitive drum; charging means for charging the electrophotographic photosensitive drum; and the electrophotographic photosensitive drum. A developing unit for developing the latent image formed on the electrophotographic photosensitive drum by the developing unit, a transfer unit for transferring the toner image formed on the electrophotographic photosensitive drum to the recording medium, Fixing means for fixing the toner image transferred to the recording medium to the recording medium; a motor; a driving rotator for transmitting a driving force of the motor; and a driving rotator provided at a central portion of the driving rotator. A non-circular twisted hole having a plurality of corners, and a first conductive member provided at the center of the twisted hole; A first conductive member electrically connected to a device main body of the device; a moving unit configured to move the first conductive member in a direction intersecting a rotation direction of the driving rotator; and the electrophotographic photosensitive drum. A non-circular twisted projection having a plurality of corners, the second conductive member being provided at one end in the longitudinal direction of the non-circular projection and having a plurality of corners. A second conductive member electrically connected to the electrophotographic photoreceptor drum, wherein the first rotating member rotates when the driving rotary member rotates with the hole and the projection fitted. An electrophotographic image forming apparatus, wherein the electroconductive member is electrically connected to a second electroconductive member to ground the electrophotographic photosensitive drum.
れた突起とが嵌合する前に、前記第一の導電部材をスラ
スト方向へ移動させることを特徴とする請求項１に記載
の電子写真画像形成装置。2. The electronic device according to claim 1, wherein the moving unit moves the first conductive member in a thrust direction before the twisted hole and the twisted protrusion are fitted. Photographic image forming device.
記載の電子写真画像形成装置。3. The electrophotographic image forming apparatus according to claim 1, wherein the driving rotator is a gear.
て軸方向へ移動することを特徴とする請求項１に記載の
電子写真画像形成装置。4. The electrophotographic image forming apparatus according to claim 1, wherein the first conductive member moves in an axial direction with respect to a driving rotating body.
一の導電部材との間に設けられた端面カム装置であるこ
とを特徴とする請求項１に記載の電子写真画像形成装
置。5. The electrophotographic image forming apparatus according to claim 1, wherein said moving means is an end cam device provided between said driving rotating body and said first conductive member.
向って付勢する付勢手段を有し、前記駆動回転体は前記
付勢手段によって第一の導電部材を介して前記ねじれた
突起に向って付勢されていることを特徴とする請求項１
に記載の電子写真画像形成装置。6. A biasing means for biasing said first conductive member toward a second conductive member, wherein said driving rotator is twisted via said first conductive member by said biasing means. 2. The projection is urged toward the projection.
2. The electrophotographic image forming apparatus according to 1.
体に画像を形成するための電子写真画像形成装置におい
て、 ａ．モータと、 ｂ．前記モータの駆動力を伝達するための駆動回転体
と、 ｃ．前記駆動回転体の中央部に設けられた、前記駆動回
転体と一体に回転する断面が複数個の角部を有する非円
形のねじれた穴と、 前記ねじれた穴の中心に設けられた第一の導電部材であ
って、前記画像形成装置の装置本体と電気的に接続して
いる第一の導電部材と、 前記第一の導電部材を前記駆動回転体の回転方向と交差
する方向へ移動させる移動手段と、 ｄ．電子写真感光体ドラムと、 前記電子写真感光体ドラムに作用するプロセス手段と、 前記電子写真感光体ドラムの長手方向一端に設けられ
た、前記穴と嵌合する、断面が複数個の角部を有する非
円形のねじれた突起と、 前記ねじれた突起の中心に設けられた第二の導電部材で
あって、前記電子写真感光体ドラムと電気的に接続して
いる第二の導電部材と、 を有するプロセスカートリッジを取り外し可能に装着す
るための装着手段と、 ｅ．前記記録媒体を搬送するための搬送手段と、 を有して、 前記プロセスカートリッジが装置本体に装着された際
に、前記突起が前記穴と嵌合した状態で前記駆動回転体
が回転する際に前記第一の導電部材と第二の導電部材と
が電気的に接続して、前記電子写真感光体ドラムのアー
スをとるように構成したことを特徴とする電子写真画像
形成装置。7. An electrophotographic image forming apparatus for detachably attaching a process and a ridge and for forming an image on a recording medium, comprising: a. A motor; b. A driving rotator for transmitting a driving force of the motor; c. A non-circular twisted hole provided at a center portion of the drive rotating body and having a plurality of corners having a cross section that rotates integrally with the drive rotating body; and a first provided at the center of the twisted hole. A first conductive member electrically connected to the apparatus main body of the image forming apparatus, and the first conductive member is moved in a direction intersecting a rotation direction of the driving rotator. Means of transportation; d. An electrophotographic photosensitive drum; a process unit acting on the electrophotographic photosensitive drum; and a plurality of corners having a plurality of cross-sections, which are provided at one longitudinal end of the electrophotographic photosensitive drum and are fitted with the holes. A non-circular twisted protrusion having; a second conductive member provided at the center of the twisted protrusion, the second conductive member being electrically connected to the electrophotographic photosensitive drum; Mounting means for removably mounting the process cartridge having the e. Transport means for transporting the recording medium, wherein, when the process cartridge is mounted on the apparatus main body, when the drive rotating body rotates with the projections fitted in the holes. An electrophotographic image forming apparatus, wherein the first conductive member and the second conductive member are electrically connected to ground the electrophotographic photosensitive drum.
れた突起とが嵌合する前に、前記第一の導電部材をスラ
スト方向へ移動させることを特徴とする請求項７に記載
の電子写真画像形成装置。8. The electronic device according to claim 7, wherein the moving unit moves the first conductive member in a thrust direction before the twisted hole and the twisted protrusion are fitted. Photographic image forming device.
記載の電子写真画像形成装置。9. The electrophotographic image forming apparatus according to claim 7, wherein said driving rotator is a gear.
して軸方向へ移動することを特徴とする請求項７に記載
の電子写真画像形成装置。10. An electrophotographic image forming apparatus according to claim 7, wherein said first conductive member moves in an axial direction with respect to a driving rotating body.
第一の導電部材との間に設けられた端面カム装置である
ことを特徴とする請求項７に記載の電子写真画像形成装
置。11. An electrophotographic image forming apparatus according to claim 7, wherein said moving means is an end face cam device provided between said driving rotary member and said first conductive member.
に向って付勢する付勢手段を有し、前記駆動回転体は前
記付勢手段によって第一の導電部材を介して前記ねじれ
た突起に向って付勢されていることを特徴とする請求項
７に記載の電子写真画像形成装置。12. A drive unit for urging the first conductive member toward a second conductive member, wherein the driving rotator is twisted via the first conductive member by the urging unit. The electrophotographic image forming apparatus according to claim 7, wherein the electrophotographic image forming apparatus is urged toward the projection.
録媒体に画像を形成する電子写真画像形成装置におい
て、 ａ．電子写真感光体と、 前記電子写真感光体に作用するプロセス手段と、 前記電子写真感光体の一端に備えられた被動側連結部と
前記被動側連結部に備えられた電子写真感光体に導通す
る導電性部材と、 を有するプロセスカートリッジを取り外し可能に装着す
る装着手段と、 ｂ．モータと、 ｃ．前記モータにより回転駆動されその回転中心線上に
プロセスカートリッジの前記被動側連結部に向って軸方
向に進退して係脱される駆動側連結部を有する回転体
と、 ｄ．前記回転体中を挿通して回転中心線上において、回
転体の回転により回転体に対して軸線方向に往復移動可
能で駆動側連結部を連動して前記導電性部材と接離する
アース接点部材と、 ｅ．前記アース接点部材を前記導電性部材に向って付勢
する付勢手段と、 ｆ．前記記録媒体を搬送するための搬送手段と、 を有することを特徴とする電子写真画像形成装置。13. An electrophotographic image forming apparatus which detachably attaches a process cartridge and forms an image on a recording medium, comprising: a. An electrophotographic photoreceptor; a process unit acting on the electrophotographic photoreceptor; and a conductive portion provided at one end of the electrophotographic photoreceptor and an electrophotographic photoreceptor provided at the driven side connecting portion. Mounting means for removably mounting a process cartridge having a conductive member; and b. A motor; c. A rotating body having a drive-side connection portion which is driven to rotate by the motor and axially moves toward and away from the driven-side connection portion of the process cartridge on its rotation center line and is disengaged; d. An earth contact member that is inserted through the rotating body and on a rotation center line, is capable of reciprocating in the axial direction with respect to the rotating body by rotation of the rotating body, and interlocks with the conductive member in conjunction with a driving-side connecting portion, and , E. Biasing means for biasing the ground contact member toward the conductive member; f. An electrophotographic image forming apparatus, comprising: conveying means for conveying the recording medium.
接点部材をプロセスカートリッジ側へ付勢する付勢手段
が設けてあり、且つ前記付勢手段の付勢力を前記回転体
に伝える為の突き当て部があり、前記回転体には前記突
き当て部と接触する受け部が設けてあることを特徴とす
る請求項１３に記載の電子写真画像形成装置。14. An urging means for urging the earth contact member toward the process cartridge at one end of the earth contact member, and abutment for transmitting the urging force of the urging means to the rotating body. The electrophotographic image forming apparatus according to claim 13, further comprising a receiving portion provided on the rotating body, the receiving portion being in contact with the abutting portion.
回転体が後退位置において回転して前進する際互に係合
してアース接点部材を回転体に対して往復動させる段差
もしくは傾斜部を設けてあることを特徴とする請求項１
４に記載の電子写真画像形成装置。15. A step or an inclined portion which engages with the abutting portion and the receiving portion to reciprocate the ground contact member with respect to the rotating body when the rotating body rotates and advances in the retracted position and advances. 2. The method according to claim 1, further comprising:
5. The electrophotographic image forming apparatus according to 4.
リッジの導電性部材に突き当った後の駆動側連結部と被
動側連結部との係合長さを長くすることにより、前記ア
ース接点部材の突き当て部と回転体の受け部との係合が
外れる長さとしたことを特徴とする請求項１４又は１５
に記載の電子写真画像形成装置。16. An abutment of the ground contact member by increasing a length of engagement between the drive side connection portion and the driven side connection portion after the ground contact member abuts on the conductive member of the process cartridge. The length of the rotating member and the receiving portion of the rotating body are set so as to be disengaged.
2. The electrophotographic image forming apparatus according to 1.
た、前記駆動側連結部と一体に回転する断面が複数の角
部を有する非円形のねじれた穴と、前記被動側連結部の
中央に設けられた、前記穴と嵌入する断面が複数の角部
を有する非円形のねじれた突起を有して、 前記駆動側連結部と前記被動側連結部が回転することに
よって、前記突起と前記穴が互いに引き込み力を受けた
状態で前記回転体の回転力を前記電子写真感光体に伝達
するような構成にしたことを特徴とする請求項１３から
請求項１７の何れか１つに記載の電子写真画像形成装
置。17. A non-circular twisted hole provided at the center of the driving-side connecting portion and having a plurality of corners and having a plurality of corners and rotating integrally with the driving-side connecting portion, and a center of the driven-side connecting portion. A cross-section that fits into the hole has a non-circular twisted projection having a plurality of corners, and the drive-side connection part and the driven-side connection part are rotated, so that the protrusion and the 18. The apparatus according to claim 13, wherein the rotation force of the rotating body is transmitted to the electrophotographic photosensitive member in a state where the holes receive the pulling force from each other. Electrophotographic image forming apparatus.
た、前記駆動側連結部と一体に回転する断面が複数の角
部を有する非円形のねじれた突起と、前記被動側連結部
の中央に設けられた、前記穴と嵌入する断面が複数の角
部を有する非円形のねじれた穴を有して、 前記駆動側連結部と前記被動側連結部が回転することに
よって、前記突起と前記穴が互いに引き込む力を受けた
状態で前記回転体の回転力を前記電子写真感光体に伝達
するような構成にしたことを特徴とする請求項１３から
請求項１７の何れか１つに記載の電子写真画像形成装
置。18. A non-circular twisted projection having a plurality of corners and having a plurality of corners, and provided at the center of the drive-side connection portion and rotating integrally with the drive-side connection portion, and a center of the driven-side connection portion. A cross-section that fits into the hole is provided with a non-circular twisted hole having a plurality of corners, and the drive-side connection portion and the driven-side connection portion rotate to form the protrusion and the protrusion. The structure according to any one of claims 13 to 17, wherein the rotation force of the rotating body is transmitted to the electrophotographic photosensitive member in a state where the holes receive the pulling force of each other. Electrophotographic image forming apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30167998A JP3787441B2 (en) | 1998-10-08 | 1998-10-08 | Electrophotographic image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30167998A JP3787441B2 (en) | 1998-10-08 | 1998-10-08 | Electrophotographic image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000112200A true JP2000112200A (en) | 2000-04-21 |
| JP3787441B2 JP3787441B2 (en) | 2006-06-21 |
Family
ID=17899838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30167998A Expired - Fee Related JP3787441B2 (en) | 1998-10-08 | 1998-10-08 | Electrophotographic image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3787441B2 (en) |
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