JP2017078743A - Developing device, process cartridge, and image forming apparatus - Google Patents

Developing device, process cartridge, and image forming apparatus Download PDF

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JP2017078743A
JP2017078743A JP2015205447A JP2015205447A JP2017078743A JP 2017078743 A JP2017078743 A JP 2017078743A JP 2015205447 A JP2015205447 A JP 2015205447A JP 2015205447 A JP2015205447 A JP 2015205447A JP 2017078743 A JP2017078743 A JP 2017078743A
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developing
power supply
developing device
carrier
image
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JP6624500B2 (en
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大輔 濱田
Daisuke Hamada
大輔 濱田
淳 四折
Atsushi Yotsuori
淳 四折
吉沢　秀男
Hideo Yoshizawa
秀男 吉沢
信吾 久保木
Shingo Kuboki
信吾 久保木
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Ricoh Co Ltd
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Ricoh Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To make it possible to improve reliability of feeding of a developing bias.SOLUTION: In a developing device 12 comprising a power feeding member 200 including a contact terminal for receiving power, and a plurality of contact terminals for feeding power, such as a first contact terminal 201 for feeding power and a second contact terminal 202 for feeding power that slide with respect to a developer carrier, such as a developing roller 28, the developing device feeding a developing bias from a developing bias power supply to the developer carrier that rotates while carrying a developer on its outer peripheral surface through the power feeding member to develop a latent image on a latent image carrier, such as a photoreceptor 10, at least two contact terminals for feeding power of the plurality of contact terminals for feeding power are in slide contact with the developer carrier at different portions from each other in the axial direction of the developer carrier.SELECTED DRAWING: Figure 7

Description

本発明は、現像装置、プロセスカートリッジ及び画像形成装置に関するものである。   The present invention relates to a developing device, a process cartridge, and an image forming apparatus.

従来、中空回転体の現像剤担持体としての現像ローラに現像バイアスを印加して現像剤中のトナーを像担持体としての感光体上に静電的に付着させ、その表面上の静電潜像を可視像化する現像装置が知られている。   Conventionally, a developing bias is applied to a developing roller as a developer carrying member of a hollow rotating body to electrostatically adhere toner in the developer onto a photosensitive member as an image carrying member, and electrostatic latent images on the surface of the developing roller. A developing device that visualizes an image is known.

例えば、特許文献１には、回転する円筒状の現像ローラに対して現像バイアス電源から現像バイアスを給電する給電部材を備え、その給電部材を現像ローラの内部に固定配置している現像装置が開示されている。この給電部材は、受電用接点端子と２つの給電用接点端子とを備えたローラ電極板を有している。ローラ電極板は、現像バイアス電源からの電力を現像ローラ軸方向外側に露出する受電用接点端子で受ける。また、ローラ電極板に設けられる２つの給電用接点端子は、ローラ電極板本体から現像ローラ内周面に向けて互いに逆向きに延びている。回転する現像ローラの内周面に対して２つの給電用接点端子を摺接させることで、現像バイアス電源からの電力を現像ローラへ供給する。   For example, Patent Document 1 discloses a developing device that includes a power feeding member that feeds a developing bias from a developing bias power source to a rotating cylindrical developing roller, and the power feeding member is fixedly disposed inside the developing roller. Has been. The power supply member has a roller electrode plate having a power receiving contact terminal and two power supply contact terminals. The roller electrode plate receives power from the developing bias power source at a power receiving contact terminal exposed to the outside in the developing roller axial direction. The two contact terminals for power feeding provided on the roller electrode plate extend in opposite directions from the roller electrode plate body toward the inner peripheral surface of the developing roller. Electric power from the developing bias power supply is supplied to the developing roller by sliding the two power supply contact terminals against the inner peripheral surface of the rotating developing roller.

上記特許文献１に開示の現像装置によれば、２つの給電用接点端子が現像ローラの軸線方向で同じ位置にあるので、２つの給電用接点端子によって摺接される現像ローラ側の摺動箇所はいずれも同じ箇所である。そのため、それぞれの給電用接点端子との接点不良に影響を及ぼす現像ローラ側の摺接箇所の状態（経時的摩耗など）が同様のものとなる。その結果、２つの給電用接点端子を用いていても、いずれの給電用接点端子も同じ時期に接点不良が発生しやすく、現像ローラへの給電の信頼性を十分に高めることができない。   According to the developing device disclosed in Patent Document 1, since the two power supply contact terminals are in the same position in the axial direction of the developing roller, the sliding portion on the developing roller side that is slidably contacted by the two power supply contact terminals Are the same places. Therefore, the state (such as wear over time) of the sliding contact portion on the developing roller side that affects the contact failure with each power supply contact terminal is the same. As a result, even when two power supply contact terminals are used, contact failure easily occurs at the same time in any power supply contact terminal, and the reliability of power supply to the developing roller cannot be sufficiently improved.

上述した課題を解決するために、受電用接点端子と回転する現像剤担持体に対して摺動する複数の給電用接点端子とを備えた給電部材を有し、現像剤を外周面に担持して回転する前記現像剤担持体へ現像バイアス電源から前記給電部材を介して現像バイアスを給電することにより潜像担持体上の潜像を現像する現像装置において、前記複数の給電用接点端子のうち少なくとも２つの前記給電用接点端子は、前記現像剤担持体の軸線方向で互いに異なる箇所に対して摺接することを特徴とするものである。   In order to solve the above-described problems, a power supply member having a power reception contact terminal and a plurality of power supply contact terminals that slide against a rotating developer carrier is provided, and the developer is carried on the outer peripheral surface. In the developing device for developing a latent image on the latent image carrier by supplying a developing bias from a developing bias power source to the developer carrying member rotating through the power feeding member, of the plurality of power supply contact terminals At least two of the power supply contact terminals are in sliding contact with different locations in the axial direction of the developer carrier.

本発明によれば、現像バイアス給電の信頼性を高められるという特有の効果が得られる。   According to the present invention, it is possible to obtain a specific effect that the reliability of the developing bias feeding can be improved.

本発明の実施形態に係るプリンタ１００における画像形成部の要部を示す概略構成図。FIG. 2 is a schematic configuration diagram illustrating a main part of an image forming unit in a printer 100 according to an embodiment of the present invention. 現像装置１２を備えたプリンタ１００の概略構成図。1 is a schematic configuration diagram of a printer 100 including a developing device 12. FIG. （ａ）はプロセスカートリッジ２０をプリンタ１００の後側から見た斜視図、（ｂ）は（ａ）のプロセスカートリッジ２０の後端部側の一部を破断して示す一部断面図。(A) is the perspective view which looked at the process cartridge 20 from the back side of the printer 100, (b) is a fragmentary sectional view which fractures | ruptures and shows a part of the rear end side of the process cartridge 20 of (a). 上部クリーニング部のケースを外したときの作像ユニットの斜視説明図。FIG. 6 is a perspective explanatory view of the image forming unit when the case of the upper cleaning unit is removed. プロセスカートリッジ２０の断面図。FIG. 4 is a cross-sectional view of the process cartridge 20. 図３（ａ）のプロセスカートリッジ２０の後端部側の拡大斜視図。FIG. 4 is an enlarged perspective view of a rear end portion side of the process cartridge 20 of FIG. 本実施形態の現像装置における給電部材２００を説明する図。FIG. 4 is a diagram illustrating a power supply member 200 in the developing device of the present embodiment. 給電部材２００とプロセスカートリッジ２０中の現像ローラ２８の回転軸２８ａとの接続を説明する説明図。FIG. 3 is an explanatory diagram for explaining a connection between a power supply member 200 and a rotating shaft 28a of a developing roller 28 in the process cartridge 20. 給電部材２００と現像ローラ２８の回転軸２８ａとの接続を説明する説明図。FIG. 4 is an explanatory diagram illustrating a connection between a power feeding member 200 and a rotating shaft 28a of the developing roller 28.

以下、本発明を、画像形成装置である電子写真方式のプリンタ（以下、単に「プリンタ」という。）に適用した一実施形態について説明する。
図１は、本発明の実施形態に係るプリンタにおける画像形成部の要部を示す概略構成図である。像担持体であるドラム状の感光体１０の周りには、図１中左横に設けられたローラ状の帯電装置１１から感光体１０の矢印Ａで示す回転方向に向かって順に、下に現像装置１２、右横に転写装置１３と用紙分離装置１４、上にクリーニング装置１５が配置されている。 An embodiment in which the present invention is applied to an electrophotographic printer (hereinafter simply referred to as “printer”) as an image forming apparatus will be described below.
FIG. 1 is a schematic configuration diagram illustrating a main part of an image forming unit in a printer according to an embodiment of the present invention. Around the drum-shaped photoconductor 10 that is an image carrier, the roller-shaped charging device 11 provided on the left side in FIG. 1 is developed downward in order in the rotation direction indicated by the arrow A of the photoconductor 10. A transfer device 13 and a sheet separating device 14 are arranged on the right side of the device 12, and a cleaning device 15 is arranged on the right side.

図２は、現像装置１２を備えたプリンタ１００の概略構成図である。図２において、紙面手前側は、ユーザが操作部や給紙カセット、あるいは図３〜図６等に示すプロセスカートリッジ２０を着脱操作する際の前側（正面側）に相当する。また、紙面奥側は、プリンタ１００本体側からの駆動をプロセスカートリッジ２０に伝達する駆動機構等が配置されている後側に相当する。   FIG. 2 is a schematic configuration diagram of the printer 100 including the developing device 12. In FIG. 2, the front side of the paper corresponds to the front side (front side) when the user operates the operation unit, the paper feed cassette, or the process cartridge 20 shown in FIGS. Further, the back side of the paper surface corresponds to the rear side on which a drive mechanism and the like for transmitting the drive from the printer 100 main body side to the process cartridge 20 are disposed.

プリンタ１００は、原稿を複写するときには、公知のとおり、コンタクトガラス１０１上に原稿をセットしてからスタートボタンを押す。すると、光学読取装置１０２で原稿上の画像を読み取ると同時に、感光体１０と転写装置１３との間に、図２中矢印で示すように下から記録媒体となる用紙Ｐを送り込む。   When copying the document, the printer 100 sets the document on the contact glass 101 and presses the start button, as is well known. Then, simultaneously with the reading of the image on the original by the optical reading device 102, the paper P as a recording medium is fed between the photosensitive member 10 and the transfer device 13 from the bottom as shown by the arrow in FIG.

一方、感光体１０は、駆動手段で回転駆動され、その回転に伴い帯電装置１１で表面を一様に帯電され、帯電された表面に光書込み装置１０３からレーザ光Ｌを照射して書き込みが行われる。これにより、感光体１０の表面には、読み取った原稿画像に対応する静電潜像が形成される。感光体１０では、現像装置１２との対向位置を通るときに現像装置１２からトナーとキャリアとを含む現像剤（２成分現像剤）中のトナーが感光体側へ移動することにより、感光体１０上の静電潜像にトナーが付着されて逐次可視像化される。この可視像化したトナー像は、上述したとおり、感光体１０と転写装置１３との間に送り込んだ用紙Ｐ上に、転写装置１３によって転写される。   On the other hand, the photosensitive member 10 is rotationally driven by a driving unit, and the surface is uniformly charged by the charging device 11 along with the rotation, and writing is performed by irradiating the charged surface with the laser light L from the optical writing device 103. Is called. As a result, an electrostatic latent image corresponding to the read document image is formed on the surface of the photoreceptor 10. In the photoconductor 10, the toner in the developer (two-component developer) containing toner and carrier moves from the developing device 12 to the photoconductor side when passing through a position facing the developing device 12. The toner is attached to the electrostatic latent image and sequentially visualized. The visible toner image is transferred by the transfer device 13 onto the paper P fed between the photoreceptor 10 and the transfer device 13 as described above.

転写後、用紙Ｐは、用紙分離装置１４で放電されることにより静電的に付着する感光体１０から分離され、定着装置１０４へ搬送してそこで転写画像が定着され、排紙部１０５へと排出される。用紙分離装置１４に代えて、分離爪を設け、感光体１０から機械的に用紙Ｐを分離するようにしてもよい。画像転写後の感光体１０は、表面に残った残留トナー等を、クリーニング装置１５に備える図１に示すクリーニングブレード１７で掻き落とされて表面が清掃された後、除電ランプで除電されてその表面電位が初期化される。   After the transfer, the paper P is separated from the electrostatically adhering photoconductor 10 by being discharged by the paper separation device 14, conveyed to the fixing device 104, where the transferred image is fixed, and then to the paper discharge unit 105. Discharged. Instead of the paper separation device 14, a separation claw may be provided to mechanically separate the paper P from the photoreceptor 10. After the image transfer, the surface of the photosensitive member 10 is removed by a cleaning blade 17 shown in FIG. The potential is initialized.

プリンタ１００では、上述した感光体１０と帯電装置１１と現像装置１２とクリーニング装置１５などを、後述する図３に示すように、筺体フレームとしての１つのカートリッジケース１９で一体化してプロセスカートリッジ２０を構成している。プロセスカートリッジ２０は、プリンタ１００の装置本体１０６に対して、カートリッジケース１９及び装置本体１０６に設けられた公知の着脱手段を介して、着脱可能に設置されている。   In the printer 100, as shown in FIG. 3, which will be described later, the above-described photosensitive member 10, charging device 11, developing device 12, cleaning device 15 and the like are integrated in a single cartridge case 19 as a housing frame. It is composed. The process cartridge 20 is detachably attached to the apparatus main body 106 of the printer 100 via a cartridge case 19 and known attachment / detachment means provided on the apparatus main body 106.

なお、プロセスカートリッジ２０は、これに限らず、少なくとも感光体１０と現像装置１２とを一体に備え、装置本体１０６に対して着脱可能に設置されるものであってもよい。また、本発明は、感光体１０と帯電装置１１と現像装置１２とクリーニング装置１５などが、プロセスカートリッジ２０を構成することなく、装置本体１０６内に配置されている画像形成装置にも準用可能である。   The process cartridge 20 is not limited to this, and may include at least the photoconductor 10 and the developing device 12 and be detachably installed on the apparatus main body 106. The present invention can also be applied mutatis mutandis to an image forming apparatus in which the photoconductor 10, the charging device 11, the developing device 12, the cleaning device 15 and the like are arranged in the apparatus main body 106 without constituting the process cartridge 20. is there.

図３（ａ）はプロセスカートリッジ２０をプリンタ１００の後側から見た斜視図、図３（ｂ）は図３（ａ）のプロセスカートリッジ２０の後端部側の一部を破断して示す一部断面図である。図４は、上部クリーニング部のケースを外したときの作像ユニットの斜視説明図である。図５はプロセスカートリッジ２０の断面図である。図６は図３（ａ）のプロセスカートリッジ２０の後端部側の拡大斜視図である。   FIG. 3A is a perspective view of the process cartridge 20 as viewed from the rear side of the printer 100, and FIG. 3B is a partially broken view of the rear end side of the process cartridge 20 of FIG. FIG. FIG. 4 is an explanatory perspective view of the image forming unit when the case of the upper cleaning unit is removed. FIG. 5 is a cross-sectional view of the process cartridge 20. FIG. 6 is an enlarged perspective view of the rear end portion side of the process cartridge 20 of FIG.

プロセスカートリッジ２０は、プリンタ１００の装置本体１０６内（図２参照）で前後に対向して設けられている側板間に取り付けられて着脱自在にセットされる。このプロセスカートリッジ２０には、感光体１０と帯電装置１１と現像装置１２とクリーニング装置１５などを収容するカートリッジケース１９が設けられている。更に、カートリッジケース１９の前後の端部には、プロセスカートリッジの筺体フレームとしてのカートリッジフレーム９が対で配置されている。   The process cartridge 20 is attached between the side plates provided facing the front and rear in the apparatus main body 106 of the printer 100 (see FIG. 2), and is detachably set. The process cartridge 20 is provided with a cartridge case 19 that houses the photosensitive member 10, the charging device 11, the developing device 12, the cleaning device 15, and the like. Further, a cartridge frame 9 as a housing frame of the process cartridge is disposed in a pair at the front and rear ends of the cartridge case 19.

このようなプリンタ１００において、上述した現像装置１２では、図１に示すように、装置下部側に現像剤攪拌部２１を設け、上部側に現像剤担持部２２を設けている。現像剤攪拌部２１には、トナーとキャリアとを含む２成分現像剤を攪拌しながら回転搬送する回転部材及び搬送部材としての、第１搬送スクリュ２３と第２搬送スクリュ２４が設けられている。なお、第１搬送スクリュ２３と第２搬送スクリュ２４とは、攪拌部材としても機能する。現像剤中のトナーとキャリアとの混合比を例えば透磁率等から検知するトナー濃度センサも設けられている。   In such a printer 100, in the developing device 12 described above, as shown in FIG. 1, a developer stirring unit 21 is provided on the lower side of the device, and a developer carrying unit 22 is provided on the upper side. The developer agitating section 21 is provided with a first conveying screw 23 and a second conveying screw 24 as a rotating member and a conveying member that rotate and convey the two-component developer containing toner and carrier. The first transport screw 23 and the second transport screw 24 also function as a stirring member. There is also provided a toner concentration sensor for detecting the mixing ratio between the toner and the carrier in the developer from, for example, magnetic permeability.

図１に示すように、現像剤担持部２２には、現像窓２７を通して感光体１０と対向する位置に現像剤担持体となる現像ローラ２８と、感光体１０への現像剤の供給量を制御する現像ドクタ２９とが配置されている。現像剤担持部２２では、開口を通して現像剤攪拌部２１から送り込まれた現像剤を、現像ローラ２８で担持して後、現像ドクタ２９で均一化して、その均一化した現像剤中のトナーを所定方向に回転しつつ感光体１０に付着させる。感光体１０の周囲に配置したクリーニング装置１５には、カートリッジケース１９のクリーニングケース部１５ａ内に、クリーニングブレード１７で掻き落した残留トナーを搬送するスクリュ状のトナー搬送部材３０が、感光体１０の軸方向に配置されている。搬送される残留トナー等は、感光体クリーニング装置長手方向端部（図５の図面奥側）に搬送し落下し、長手方向端部（図５の図面手前側）の傾斜容器の中空間を通って現像装置に搬送され、再度現像に利用（リサイクル）される。   As shown in FIG. 1, the developer carrying unit 22 controls a developing roller 28 serving as a developer carrying member at a position facing the photoconductor 10 through a developing window 27, and a developer supply amount to the photoconductor 10. A developing doctor 29 is disposed. In the developer carrying unit 22, the developer fed from the developer stirring unit 21 through the opening is carried by the developing roller 28, and then uniformed by the developing doctor 29, and the toner in the homogenized developer is predetermined. It adheres to the photoreceptor 10 while rotating in the direction. The cleaning device 15 disposed around the photoreceptor 10 includes a screw-like toner transport member 30 that transports residual toner scraped off by the cleaning blade 17 into the cleaning case portion 15 a of the cartridge case 19. It is arranged in the axial direction. Residual toner or the like that is conveyed is transported and dropped to the end in the longitudinal direction of the photoconductor cleaning device (the back side of the drawing in FIG. 5) and passes through the middle space of the inclined container at the end in the longitudinal direction (the front side of the drawing in FIG. 5). Then, it is transported to the developing device and used (recycled) again for development.

現像装置１２では、現像時、駆動モータを駆動し、その駆動を伝達して現像ローラ２８を回転すると共に、第１搬送スクリュ２３及び第２搬送スクリュ２４を回転して現像剤を攪拌し、トナーとキャリアを摩擦帯電しつつ現像ローラ２８へ搬送する。一方、現像ローラ２８に所定の現像バイアスを印加して現像剤中のトナーを感光体１０の表面に静電的に付着しその表面上の潜像を可視像化する。   In the developing device 12, during development, the drive motor is driven, the drive is transmitted to rotate the developing roller 28, and the first conveying screw 23 and the second conveying screw 24 are rotated to stir the developer, and the toner The carrier is conveyed to the developing roller 28 while being frictionally charged. On the other hand, a predetermined developing bias is applied to the developing roller 28, and the toner in the developer is electrostatically attached to the surface of the photoconductor 10, and the latent image on the surface is visualized.

上述したように、２成分現像においては所望量のトナーを感光体１０に付着させるため、現像ローラ２８に汲み上げられるトナー量に関して、感光体１０へ静電的にトナーを付着させるための現像ローラ２８と感光体１０との間の距離の精度が重要である。現像ローラ２８と感光体１０との間の距離は、現像ローラ２８の回転軸２８ａと感光体１０の回転軸との位置決めをするために感光体１０及び現像ローラ２８の回転軸方向の両端部に配置される位置決め部材のピッチ間距離によって決められる。従って、高画質化及び画像濃度確保のためには、現像ローラ２８と感光体１０との間の距離である間隙を狭く、且つ精度良く維持する必要がある。現像ローラ２８と感光体１０との間の距離である現像ギャップは、狙いとする画質により異なるが、大体０．１〜０．５［ｍｍ］に設定される。   As described above, in the two-component development, since a desired amount of toner is attached to the photoreceptor 10, the developing roller 28 for attaching the toner electrostatically to the photoreceptor 10 with respect to the amount of toner pumped to the developing roller 28. The accuracy of the distance between the photoconductor 10 and the photoconductor 10 is important. The distance between the developing roller 28 and the photosensitive member 10 is set at both ends of the photosensitive member 10 and the developing roller 28 in the direction of the rotating shaft in order to position the rotating shaft 28a of the developing roller 28 and the rotating shaft of the photosensitive member 10. It is determined by the distance between pitches of the positioning members to be arranged. Therefore, in order to improve the image quality and secure the image density, it is necessary to maintain a narrow gap, which is the distance between the developing roller 28 and the photoconductor 10, with high accuracy. The development gap, which is the distance between the developing roller 28 and the photoconductor 10, varies depending on the target image quality, but is generally set to 0.1 to 0.5 [mm].

図１、図５、図６に示すように、第１搬送スクリュ２３と回転軸２３ａとが、第２搬送スクリュ２４と回転軸２４ａとが、それぞれ樹脂で一体的に形成されており、軽量化に寄与している。図６に示すように、第１搬送スクリュ２３の回転軸２３ａは、前後方向Ｙの後側で一部がカートリッジフレーム９の外表面から突出している。第２搬送スクリュ２４の回転軸２４ａは、前後方向Ｙの後側で一部がカートリッジフレーム９の外表面から突出している。回転軸２４ａの突出部の一端部でもある先端部には、搬送部材ギアとしての第２搬送スクリュギア５が取り付けられ固定されている。これにより、第２搬送スクリュギア５に回転駆動力が伝達されると、第２搬送スクリュギア５と回転軸２４ａとは一緒に回転する。なお、回転軸２４ａに装着された止め輪３２で、回転軸２４ａの前後方向Ｙの後側への抜けが止められている。   As shown in FIGS. 1, 5, and 6, the first conveying screw 23 and the rotating shaft 23 a are integrally formed of resin, and the second conveying screw 24 and the rotating shaft 24 a are integrally formed. It contributes to. As shown in FIG. 6, the rotation shaft 23 a of the first transport screw 23 partially protrudes from the outer surface of the cartridge frame 9 on the rear side in the front-rear direction Y. A part of the rotation shaft 24 a of the second transport screw 24 protrudes from the outer surface of the cartridge frame 9 on the rear side in the front-rear direction Y. A second transport screw gear 5 serving as a transport member gear is attached and fixed to a distal end portion that is also one end portion of the protruding portion of the rotating shaft 24a. Thus, when the rotational driving force is transmitted to the second transport screw gear 5, the second transport screw gear 5 and the rotary shaft 24a rotate together. In addition, the retaining ring 32 attached to the rotating shaft 24a prevents the rotating shaft 24a from coming out to the rear side in the front-rear direction Y.

図６に示すように、第１搬送スクリュ２３の回転軸２３ａの後端側には第１搬送スクリュギアが設けられ、第２搬送スクリュ２４の回転軸２４ａの後端側には第２搬送スクリュギア５が設けられている。第１搬送スクリュ２３と第２搬送スクリュ２４とは、上記第１搬送スクリュギアと第２搬送スクリュギア５とがプロセスカートリッジ２０の後端側に設けられたアイドラギアとそれぞれ噛み合うことにより、同じ回転方向に回転するようになっている。図３、図６において、軸受部４は、第１搬送スクリュ２３の回転軸２３ａを軸受している。   As shown in FIG. 6, a first transport screw gear is provided on the rear end side of the rotation shaft 23 a of the first transport screw 23, and a second transport screw gear 5 is disposed on the rear end side of the rotation shaft 24 a of the second transport screw 24. Is provided. The first transport screw 23 and the second transport screw 24 rotate in the same rotational direction when the first transport screw gear and the second transport screw gear 5 mesh with the idler gear provided on the rear end side of the process cartridge 20, respectively. It is supposed to be. 3 and 6, the bearing portion 4 supports the rotating shaft 23 a of the first transport screw 23.

第２搬送スクリュ２４の回転軸２４ａ近傍のカートリッジフレーム９（図６参照）の外側面（前後方向Ｙの後方向の面）には、被入力ギア２を回転可能に支持する被入力ギア軸２ｃが取り付け、固定されている。被入力ギア２は、プロセスカートリッジ２０が装置本体１０６に装着されたとき、装置本体１０６側のモータ等の駆動源から伝達される回転駆動力を伝達する駆動ギアと噛み合うようになっている。被入力ギア軸２ｃは、鋼材等の金属で形成されている。被入力ギア２は、小径ギア２ａと大径ギア２ｂとを有し、これらが適宜の樹脂で一体成形されている。被入力ギア２は、被入力ギア軸２ｃに装着された止め輪３３で、本体入力ギア軸２ｃの前後方向Ｙの後側への抜けが止められている。   An input gear shaft 2c that rotatably supports the input gear 2 on the outer surface (the rear surface in the front-rear direction Y) of the cartridge frame 9 (see FIG. 6) in the vicinity of the rotation shaft 24a of the second conveying screw 24. Is attached and fixed. The input gear 2 meshes with a drive gear that transmits a rotational driving force transmitted from a drive source such as a motor on the apparatus main body 106 side when the process cartridge 20 is mounted on the apparatus main body 106. The input gear shaft 2c is formed of a metal such as a steel material. The input gear 2 has a small-diameter gear 2a and a large-diameter gear 2b, which are integrally formed of a suitable resin. The input gear 2 is a retaining ring 33 attached to the input gear shaft 2c to prevent the main body input gear shaft 2c from coming off to the rear side in the front-rear direction Y.

現像ローラ２８の回転軸２８ａは、鋼材等の金属で形成されていて、カートリッジフレーム９の外側面から突出し、面板７に回転可能に支持されている。カートリッジフレーム９の外側面より突出した回転軸２８ａの先端部には、被入力ギア２の大径ギア２ａと常に噛み合う現像ローラギア３が取り付け、固定されている。現像ローラギア３は、回転軸２８ａに装着された止め輪３４で、回転軸２８ａの前後方向Ｙの後側への抜けが止められている。第２搬送スクリュギア５は、被入力ギア２の小径ギア２ｂと常に噛み合っている。被入力ギア２、現像ローラギア３、第２搬送スクリュギア５は、樹脂で形成されていて、軽量化に寄与している。   The rotating shaft 28 a of the developing roller 28 is formed of a metal such as steel, protrudes from the outer surface of the cartridge frame 9, and is rotatably supported by the face plate 7. The developing roller gear 3 that always meshes with the large-diameter gear 2a of the input gear 2 is attached and fixed to the tip of the rotating shaft 28a that protrudes from the outer surface of the cartridge frame 9. The developing roller gear 3 is a retaining ring 34 attached to the rotating shaft 28a, and prevents the rotating shaft 28a from coming out to the rear side in the front-rear direction Y. The second conveying screw gear 5 is always meshed with the small diameter gear 2b of the input gear 2. The input gear 2, the developing roller gear 3, and the second transport screw gear 5 are made of resin and contribute to weight reduction.

上記構成のとおり、プロセスカートリッジ２０が装置本体１０６（図２参照）に装着されセットされたとき、装置本体１０６側の駆動ギアと被入力ギア２の小径ギア２ｂとが噛み合い、装置本体１０６側から回転駆動力が伝達される。これと同時に、被入力ギア２の大径ギア２ａと噛み合っている現像ローラギア３が回転駆動されることで、現像ローラの回転軸２８ａが所定方向に回転する。同時に、被入力ギア２の小径ギア２ｂと噛み合っている第２搬送スクリュギア５が回転駆動されることで、第２搬送スクリュ２４（図１参照）の回転軸２４ａが回転し、上記アイドラギアを介して第２搬送スクリュ２４と同じ回転方向に第１搬送スクリュ２３（図１参照）も回転する。   As described above, when the process cartridge 20 is mounted and set in the apparatus main body 106 (see FIG. 2), the drive gear on the apparatus main body 106 side and the small-diameter gear 2b of the input gear 2 are engaged with each other from the apparatus main body 106 side. A rotational driving force is transmitted. At the same time, the developing roller gear 3 meshing with the large-diameter gear 2a of the input gear 2 is driven to rotate, whereby the rotating shaft 28a of the developing roller rotates in a predetermined direction. At the same time, the second conveying screw gear 5 meshed with the small-diameter gear 2b of the input gear 2 is driven to rotate, whereby the rotating shaft 24a of the second conveying screw 24 (see FIG. 1) rotates, and the above idler gear is used. The first transport screw 23 (see FIG. 1) also rotates in the same rotational direction as the second transport screw 24.

図３（ｂ）、図６に示すように、カートリッジフレーム９の外側面には、面板７がネジ３１で締結され固定されている。図３（ａ）、（ｂ）に示すように、プロセスカートリッジ２０の前側のカートリッジフレーム９’の外側面には、面板がネジで締結され固定されている。これら一対の面板７では、図６に示すように、各面板に設けられた貫通孔において感光体１０の回転軸と現像ローラの回転軸２８ａとをそれぞれの回転軸方向の端部で回転可能に支持している。それにより、図１に示すように、感光体１０の回転軸と現像ローラ２８の回転軸２８ａとの軸間距離が定められている。   As shown in FIGS. 3B and 6, the face plate 7 is fastened and fixed to the outer surface of the cartridge frame 9 with screws 31. As shown in FIGS. 3A and 3B, a face plate is fastened and fixed to the outer surface of the cartridge frame 9 'on the front side of the process cartridge 20 with screws. As shown in FIG. 6, the pair of face plates 7 can rotate the rotating shaft of the photosensitive member 10 and the rotating shaft 28 a of the developing roller at the end portions in the respective rotating shaft directions in through holes provided in the face plates. I support it. Thereby, as shown in FIG. 1, the distance between the rotation shaft of the photosensitive member 10 and the rotation shaft 28a of the developing roller 28 is determined.

次に、本発明の特徴部分である給電部の給電部材について説明する。
図７は、本実施形態の現像装置における給電部材を説明する図である。図８及び図９は、給電部材２００と現像ローラ２８の回転軸２８ａとの接続を説明する説明図である。
図７に示すように、給電部材２００は、画像形成装置本体に取り付けられ、第１給電用接点端子２０１と第２給電用接点端子２０２とを備えている。第１給電用接点端子２０１の第１摺接部２０１ａは、現像ローラ２８の回転軸２８ａの先端部に点接触する。第２給電用接点端子２０２の第２摺接部２０２ａは、現像ローラ２８の先端部の外周面に面接触する。そして、回転する現像ローラの回転軸の先端部は、第１給電用接点端子２０１の第１摺接部２０１ａに対して回転摺接し互いが電通可能に接続し、回転する現像ローラの回転軸の外周面は第２給電用接点端子２０２の第２摺接部２０２ａに対して面摺接し互いが電通可能に接続している。給電部材２００は、板金部材で形成され、第１給電用接点端子２０１の第１摺接部２０１ａが現像ローラの回転軸の先端部に摺接する方向（図６中の前後方向Ｙの前側）に付勢し、第２給電用接点端子２０２の第２摺接部２０２ａが現像ローラの回転軸の外周面に摺接する方向（図６中の前後方向Ｙに対し直交する方向）に付勢している。これらにより、回転する現像ローラの回転軸との接触を確実にし、現像ローラへの給電を安定に行うことができる。さらに、給電部材２００を現像ローラ２８の回転軸２８ａに対し装填した時、第２給電用接点端子２０２は、現像ローラギア３の端面（図６中の前後方向Ｙの後側に面する端面）に押し当てられてガイド部材として機能するよう曲げ形状のガイド部２０２ｂを有している。図８及び図９に示すように、現像ローラ２８の回転軸２８ａに対し給電部材２００を装填した時、現像ローラ２８の回転軸２８ａは第１給電用接点端子２０１の第１摺接部２０１ａと第２給電用接点端子２０２の第２摺接部２０２ａとに接触する。 Next, the power supply member of the power supply unit, which is a characteristic part of the present invention, will be described.
FIG. 7 is a diagram illustrating a power feeding member in the developing device of the present embodiment. 8 and 9 are explanatory diagrams for explaining the connection between the power supply member 200 and the rotating shaft 28a of the developing roller 28. FIG.
As shown in FIG. 7, the power supply member 200 is attached to the image forming apparatus main body, and includes a first power supply contact terminal 201 and a second power supply contact terminal 202. The first sliding contact portion 201 a of the first power supply contact terminal 201 is in point contact with the tip end portion of the rotation shaft 28 a of the developing roller 28. The second sliding contact portion 202 a of the second power supply contact terminal 202 is in surface contact with the outer peripheral surface of the tip portion of the developing roller 28. The leading end of the rotating shaft of the developing roller that rotates is in sliding contact with the first sliding contact portion 201a of the first power supply contact terminal 201 so that they can be electrically connected to each other. The outer peripheral surface is in sliding contact with the second sliding contact portion 202a of the second power supply contact terminal 202 and is connected so that they can communicate with each other. The power supply member 200 is formed of a sheet metal member, and is in a direction in which the first slidable contact portion 201a of the first power supply contact terminal 201 is slidably contacted with the tip end portion of the rotation shaft of the developing roller (front side in the front-rear direction Y in FIG. 6). The second slidable contact portion 202a of the second power supply contact terminal 202 is slidably contacted with the outer peripheral surface of the rotating shaft of the developing roller (a direction orthogonal to the front-rear direction Y in FIG. 6). Yes. As a result, it is possible to ensure contact with the rotating shaft of the rotating developing roller and to stably supply power to the developing roller. Further, when the power feeding member 200 is loaded on the rotating shaft 28a of the developing roller 28, the second power feeding contact terminal 202 is on the end surface of the developing roller gear 3 (the end surface facing the rear side in the front-rear direction Y in FIG. 6). The guide portion 202b has a bent shape so as to be pressed and function as a guide member. As shown in FIGS. 8 and 9, when the power supply member 200 is loaded on the rotation shaft 28 a of the developing roller 28, the rotation shaft 28 a of the developing roller 28 is connected to the first sliding contact portion 201 a of the first power supply contact terminal 201. It contacts the second sliding contact portion 202a of the second power supply contact terminal 202.

以上のように、第１給電用接点端子２０１と第２給電用接点端子２０２とは、回転する現像ローラ２８の回転軸２８ａの軸線方向で互いに異なる箇所で、その回転軸２８ａに電通可能に接続している。そのため、現像ローラ２８の回転軸２８ａと第１給電用接点端子２０１との第１摺接部２０１ａと、現像ローラ２８の回転軸２８ａと第２給電用接点端子２０２との第２摺接部２０２ａとが現像ローラ２８の軸線方向で互いに異なる。その結果、経時による第１給電用接点端子２０１と第２給電用接点端子２０２の摩耗量は互いに異なる。これにより、第１給電用接点端子２０１と現像ローラ２８の回転軸２８ａとが接触不良になる時期と、第２給電用接点端子２０２と現像ローラ２８の回転軸２８ａの外周面とが接触不良になる時期とが、互いに異なってくる。よって、いずれか一方の摺接部で接点不良が起きて給電が止まっても他方の給電は維持され、現像バイアス電源からの現像バイアスの給電が停止する事象の発生を抑制することができる。   As described above, the first power supply contact terminal 201 and the second power supply contact terminal 202 are electrically connected to the rotary shaft 28a at different locations in the axial direction of the rotary shaft 28a of the rotating developing roller 28. doing. Therefore, the first sliding contact portion 201a between the rotation shaft 28a of the developing roller 28 and the first power supply contact terminal 201, and the second sliding contact portion 202a between the rotation shaft 28a of the developing roller 28 and the second power supply contact terminal 202. Are different from each other in the axial direction of the developing roller 28. As a result, the amount of wear of the first power supply contact terminal 201 and the second power supply contact terminal 202 over time differs from each other. As a result, the contact timing between the first power supply contact terminal 201 and the rotating shaft 28a of the developing roller 28 becomes poor, and the second power supply contact terminal 202 and the outer peripheral surface of the rotating shaft 28a of the developing roller 28 have poor contact. Will be different from each other. Therefore, even if the contact failure occurs in any one of the sliding contact portions and the power supply is stopped, the other power supply is maintained, and the occurrence of an event in which the development bias power supply from the development bias power supply is stopped can be suppressed.

なお、第１給電用接点端子２０１には、耐久性の高いカーボン端子が固定されている。第２給電用接点端子２０２の第２摺接部２０２ａには、現像ローラ２８の回転軸２８ａの外周面との接触に関しても金属同士の摺接による異音の発生を抑制するため、導電性のシート部材が貼り付けられている。この導電性のシート部材と第２給電用接点端子２０２の第２摺接部２０２ａとは、両面テープ等の粘着部材で固定するものであるが、現像ローラの回転軸との接触箇所に関しては両面テープを除外して抵抗を減らし、確実に給電できるような構成としている。   Note that a highly durable carbon terminal is fixed to the first power supply contact terminal 201. The second slidable contact portion 202a of the second power supply contact terminal 202 has a conductive property in order to suppress the occurrence of abnormal noise due to the slidable contact between the metals even in contact with the outer peripheral surface of the rotating shaft 28a of the developing roller 28. A sheet member is affixed. The conductive sheet member and the second sliding contact portion 202a of the second power supply contact terminal 202 are fixed by an adhesive member such as a double-sided tape, but both sides of the contact point with the rotating shaft of the developing roller are fixed. The configuration is such that the tape is excluded and the resistance is reduced to ensure power supply.

以上本発明の好ましい実施の形態等について説明したが、本発明はかかる特定の実施形態に限定されるものではなく、上述の説明で特に限定していない限り、特許請求の範囲に記載された本発明の趣旨の範囲内において、種々の変形・変更が可能である。即ち、上述した実施形態や変形例等に例示されているものを適宜組み合わせて構成してもよい。例えば、本発明を適用する画像形成装置は、上述のタイプの画像形成装置に限らず、他のタイプの画像形成装置であってもよい。即ち、上述した画像形成装置に限らず、カラー画像形成装置であって、イエロー、マゼンタ、シアン、ブラックの４色のトナーに対応するようにプロセスカートリッジを４つ備えたタンデム型中間転写方式等の画像形成装置であってもよい。   The preferred embodiments and the like of the present invention have been described above, but the present invention is not limited to the specific embodiments, and the present invention described in the claims is not limited to the above description. Various modifications and changes are possible within the scope of the gist of the invention. That is, you may comprise combining suitably what was illustrated by embodiment, the modification, etc. which were mentioned above. For example, the image forming apparatus to which the present invention is applied is not limited to the type of image forming apparatus described above, and may be another type of image forming apparatus. That is, not only the above-described image forming apparatus but also a color image forming apparatus such as a tandem type intermediate transfer system having four process cartridges corresponding to toners of four colors of yellow, magenta, cyan, and black. It may be an image forming apparatus.

また、上記プロセスカートリッジに限らず、回転部材が、例えば、上記プロセスカートリッジを構成する帯電装置やクリーニング装置に配置されたものであってもよい。具体的には、回転部材が、例えば帯電装置において回転駆動される帯電ローラなどの場合や、回転駆動されるクリーニング装置において、トナーを廃棄または循環させる現像剤搬送スクリュなどの場合である。本発明の技術思想は、現像装置や現像ユニット、帯電装置や帯電ユニット、クリーニング装置やクリーニングユニット等が、位置決め部材に類似する部材を伴って画像形成装置の装置本体に対して着脱可能に設置される着脱ユニット及び画像形成装置にも準用できる。   In addition, the rotating member is not limited to the process cartridge, and the rotating member may be disposed, for example, in a charging device or a cleaning device constituting the process cartridge. Specifically, the rotating member is, for example, a charging roller that is rotationally driven in a charging device, or a developer conveying screw that discards or circulates toner in a rotationally driven cleaning device. The technical idea of the present invention is that a developing device, a developing unit, a charging device, a charging unit, a cleaning device, a cleaning unit, and the like are detachably installed on the image forming apparatus main body with a member similar to a positioning member. The present invention can also be applied to the detachable unit and the image forming apparatus.

以上に説明したものは一例であり、次の態様毎に特有の効果を奏する。
（態様Ａ）
受電用接点端子と回転する現像ローラ２８等の現像剤担持体に対して摺動する第１給電用接点端子２０１、第２給電用接点端子２０２等の複数の給電用接点端子とを備えた給電部材２００を有し、現像剤を外周面に担持して回転する前記現像剤担持体へ現像バイアス電源から前記給電部材を介して現像バイアスを給電することにより感光体１０等の潜像担持体上の潜像を現像する現像装置１２において、前記複数の給電用接点端子のうち少なくとも２つの前記給電用接点端子は、前記現像剤担持体の軸線方向で互いに異なる箇所に対して摺接することを特徴とするものである。
本態様によれば、複数の給電用接点端子のうち少なくとも２つの給電用接点端子によって摺接される現像ローラ側の摺接箇所は、現像剤担持体の軸線方向で互いに異なる。そのため、それぞれの摺接箇所について給電用接点端子との接点不良に影響を及ぼす現像ローラ側の摺接箇所の状態が異なり、同じ時期に接点不良は発生し難い。よって、現像バイアス給電の信頼性を高められる。 What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.
(Aspect A)
A power supply provided with a power receiving contact terminal and a plurality of power supply contact terminals such as a first power supply contact terminal 201 and a second power supply contact terminal 202 that slide against a developer carrier such as a developing roller 28 that rotates. A latent image carrier such as the photosensitive member 10 is provided by supplying a developing bias from a developing bias power source to the rotating developer carrying member having a member 200 and carrying the developer on an outer peripheral surface via the feeding member. In the developing device 12 for developing the latent image, at least two of the power supply contact terminals are in sliding contact with different portions in the axial direction of the developer carrier. It is what.
According to this aspect, the slidable contact portions on the developing roller side that are slidably contacted by at least two power supply contact terminals among the plurality of power supply contact terminals are different from each other in the axial direction of the developer carrier. Therefore, the state of the sliding contact portion on the developing roller side that affects the contact failure with the power supply contact terminal is different for each sliding contact location, and the contact failure is unlikely to occur at the same time. Therefore, the reliability of the development bias power supply can be improved.

（態様Ｂ）
（態様Ａ）において、前記複数の給電用接点端子のうち少なくとも２つの前記給電用接点端子の一方は前記現像剤担持体の回転軸の先端部に対して摺接し、他方は前記現像剤担持体の回転軸の外周面に対して摺接することを特徴とするものである。
本態様によれば、現像剤担持体の回転軸の先端部での摺接は点接触による回転摺接である。一方、現像剤担持体の回転軸の外周面での摺動は面接触による面摺接である。それぞれの給電用接点端子との接点不良に影響を及ぼす現像ローラ側の摺接箇所の状態、例えば経時的摩耗が互いに異なるため、それぞれの給電用接点端子の摩耗の連続的な進み方（進行度）などが互いに異なる。よって、各摺接箇所で同じ時期に接点不良が発生し難く、現像バイアスの給電は維持される。 (Aspect B)
In (Aspect A), at least two of the plurality of power supply contact terminals are in sliding contact with the tip of the rotation shaft of the developer carrier, and the other is the developer carrier. It is characterized by being in sliding contact with the outer peripheral surface of the rotating shaft.
According to this aspect, the sliding contact at the tip of the rotation shaft of the developer carrying member is a rotational sliding contact by point contact. On the other hand, sliding on the outer peripheral surface of the rotation shaft of the developer carrying member is surface sliding contact by surface contact. Since the state of the sliding contact portion on the developing roller side that affects the contact failure with each power supply contact terminal, for example, wear over time is different from each other, the continuous progress of the wear of each power supply contact terminal (degree of progress) ) Etc. are different from each other. Therefore, contact failure is unlikely to occur at the same time at each sliding contact point, and development bias feeding is maintained.

（態様Ｃ）
（態様Ａ）又は（態様Ｂ）において、前記給電部材は、１つの板金部材から構成されていることを特徴とするものである。
本態様によれば、部品手数を抑えられ、低コスト化を図ることができる。 (Aspect C)
In (Aspect A) or (Aspect B), the power supply member is composed of one sheet metal member.
According to this aspect, the number of parts can be reduced, and the cost can be reduced.

（態様Ｄ）
（態様Ａ）又は（態様Ｂ）において、前記現像剤担持体の回転軸の先端部に摺接する前記給電用接点端子は、カーボン端子であることを特徴とするものである。
本態様によれば、カーボン端子は耐久性が高いので、給電部材の寿命が長くなり、ライニングコストを抑えられる。 (Aspect D)
In (Aspect A) or (Aspect B), the power supply contact terminal that is in sliding contact with the tip of the rotating shaft of the developer carrying member is a carbon terminal.
According to this aspect, since the carbon terminal has high durability, the life of the power feeding member is extended, and the lining cost can be suppressed.

（態様Ｅ）
（態様Ａ）又は（態様Ｂ）において、前記現像剤担持体の回転軸の外周面に摺接する前記給電用接点端子には、導電性のシート部材が固定されていることを特徴とするものである。
本態様によれば、現像剤担持体の回転軸の外周面との摺接において金属同士の摺接による異音の発生を抑制することができる。 (Aspect E)
In (Aspect A) or (Aspect B), a conductive sheet member is fixed to the power supply contact terminal that is in sliding contact with the outer peripheral surface of the rotation shaft of the developer carrier. is there.
According to this aspect, in the sliding contact with the outer peripheral surface of the rotation shaft of the developer carrying member, it is possible to suppress the generation of noise due to the sliding contact between the metals.

（態様Ｆ）
（態様Ｅ）において、前記導電性のシート部材は、前記給電用接点端子に粘着テープで固定され、該粘着テープは前記現像剤担持体の回転軸との摺動部分に対応する前記導電性のシート部材と前記給電用接点端子との間以外に存在することを特徴とするものである。
本態様によれば、粘着テープは絶縁体であり、その粘着テープを現像剤担持体の回転軸との接触部分に対応する導電性のシート部材と給電部材の給電用接点端子との間には設けられてない。それにより、現像剤担持体と給電部材の給電用接点端子とは確実に導電性のシート部材を介して電気的に接続される。よって、現像剤担持体に現像バイアスを印加することができる。 (Aspect F)
In (Embodiment E), the conductive sheet member is fixed to the power supply contact terminal with an adhesive tape, and the adhesive tape corresponds to the sliding portion of the developer carrying member with the rotating shaft. It exists except between a sheet | seat member and the said contact terminal for electric power feeding, It is characterized by the above-mentioned.
According to this aspect, the pressure-sensitive adhesive tape is an insulator, and the pressure-sensitive adhesive tape is interposed between the conductive sheet member corresponding to the contact portion with the rotation shaft of the developer carrier and the power supply contact terminal of the power supply member. It is not provided. As a result, the developer carrier and the power supply contact terminal of the power supply member are reliably electrically connected via the conductive sheet member. Therefore, a developing bias can be applied to the developer carrying member.

（態様Ｇ）
感光体１０等の像担持体と、該像担持体の表面を帯電する帯電装置１１等の帯電手段と、該像担持体の帯電された表面を露光して潜像を形成する光書込み装置１０３等の露光手段と、該像担持体上の潜像を現像する現像装置１２等の現像手段と、該像担持体の表面をクリーニングするクリーニング装置１５等のクリーニング手段とを有するプリンタ１００等の画像形成装置の本体に対して着脱可能であり、少なくとも該像担持体と該現像手段とが一体的に支持されたプロセスカートリッジ２０において、該現像手段が、（態様Ａ）〜（態様Ｆ）の現像装置である。
本態様では、現像バイアスの給電が安定に行われる。これにより、異常画像の発生を抑制できる現像装置の画像形成装置本体に対する交換性を高めることができる。 (Aspect G)
An image carrier such as the photoreceptor 10, a charging unit such as a charging device 11 that charges the surface of the image carrier, and an optical writing device 103 that exposes the charged surface of the image carrier to form a latent image. An image of a printer 100 or the like having an exposure means such as a developing means such as a developing device 12 for developing a latent image on the image carrier, and a cleaning means such as a cleaning device 15 for cleaning the surface of the image carrier. In the process cartridge 20 that is detachable from the main body of the forming apparatus, and at least the image carrier and the developing unit are integrally supported, the developing unit includes the developing of (Aspect A) to (Aspect F). Device.
In this aspect, the developing bias is stably fed. Thereby, the exchangeability with respect to the image forming apparatus main body of the developing device which can suppress generation | occurrence | production of an abnormal image can be improved.

（態様Ｈ）
像担持体と、該像担持体の表面を帯電する帯電手段と、該像担持体の帯電された表面を露光して潜像を形成する露光手段と、該像担持体上の潜像を現像する現像手段と、該像担持体の表面をクリーニングするクリーニング手段とを有する画像形成装置において、該現像手段が、（態様Ａ）〜（態様Ｆ）の現像装置である。本態様によれば、異常画像の発生を抑制できる。 (Aspect H)
An image carrier, a charging unit for charging the surface of the image carrier, an exposure unit for exposing the charged surface of the image carrier to form a latent image, and developing a latent image on the image carrier In the image forming apparatus having the developing means for performing the cleaning and the cleaning means for cleaning the surface of the image carrier, the developing means is the developing apparatus according to (Aspect A) to (Aspect F). According to this aspect, the occurrence of an abnormal image can be suppressed.

１２ 現像装置
２８ 現像ローラ
２８ａ 回転軸
１００ プリンタ
２００ 給電部材
２０１ 第１給電用接点端子
２０１ａ 第１摺接部
２０２ 第２給電用接点端子
２０２ａ 第２摺接部
２０２ｂ ガイド部 12 Developing device 28 Developing roller 28a Rotating shaft 100 Printer 200 Power supply member 201 First power supply contact terminal 201a First sliding contact portion 202 Second power supply contact terminal 202a Second sliding contact portion 202b Guide portion

特開２０００−３１５００６号公報JP 2000-315006 A

Claims (8)

受電用接点端子と回転する現像剤担持体に対して摺動する複数の給電用接点端子とを備えた給電部材を有し、現像剤を外周面に担持して回転する前記現像剤担持体へ現像バイアス電源から前記給電部材を介して現像バイアスを給電することにより潜像担持体上の潜像を現像する現像装置において、
前記複数の給電用接点端子のうち少なくとも２つの前記給電用接点端子は、前記現像剤担持体の軸線方向で互いに異なる箇所に対して摺接することを特徴とする現像装置。 To the developer carrier having a power supply member having a power receiving contact terminal and a plurality of power supply contact terminals that slide relative to the rotating developer carrier and carrying the developer on the outer peripheral surface. In a developing device for developing a latent image on a latent image carrier by supplying a developing bias from a developing bias power source through the power supply member,
2. The developing device according to claim 1, wherein at least two of the plurality of power supply contact terminals are in sliding contact with different locations in the axial direction of the developer carrier. 請求項１記載の現像装置において、
前記複数の給電用接点端子のうち少なくとも２つの前記給電用接点端子の一方は前記現像剤担持体の回転軸の先端部に対して摺接し、他方は前記現像剤担持体の回転軸の外周面に対して摺接することを特徴とする現像装置。 The developing device according to claim 1,
One of at least two of the plurality of power supply contact terminals is in sliding contact with the tip of the rotation shaft of the developer carrier, and the other is an outer peripheral surface of the rotation shaft of the developer carrier. A developing device that is in sliding contact with the developing device. 請求項１又は２に記載の現像装置において、
前記給電部材は、１つの板金部材から構成されていることを特徴とする現像装置。 The developing device according to claim 1 or 2,
The developing device according to claim 1, wherein the power supply member is composed of one sheet metal member. 請求項１又は２に記載の現像装置において、
前記現像剤担持体の回転軸の先端部に対して摺接する前記給電用接点端子は、カーボン端子であることを特徴とする現像装置。 The developing device according to claim 1 or 2,
The developing device according to claim 1, wherein the power supply contact terminal that is in sliding contact with a tip end portion of the rotation shaft of the developer carrier is a carbon terminal. 請求項１又は２に記載の現像装置において、
前記現像剤担持体の回転軸の外周面に対して摺接する前記給電用接点端子には、導電性のシート部材が固定されていることを特徴とする現像装置。 The developing device according to claim 1 or 2,
A developing device, wherein a conductive sheet member is fixed to the power supply contact terminal that is in sliding contact with the outer peripheral surface of the rotation shaft of the developer carrier. 請求項５記載の現像装置において、
前記導電性のシート部材は、前記給電用接点端子に粘着テープで固定され、該粘着テープは前記現像剤担持体の回転軸との摺接部分に対応する前記導電性のシート部材と前記給電用接点端子との間以外に存在することを特徴とする現像装置。 The developing device according to claim 5, wherein
The conductive sheet member is fixed to the power supply contact terminal with an adhesive tape, and the adhesive tape corresponds to the sliding contact portion with the rotation shaft of the developer carrier and the power supply sheet member. A developing device, wherein the developing device exists other than between the contact terminals. 像担持体と、該像担持体の表面を帯電する帯電手段と、該像担持体の帯電された表面を露光して潜像を形成する露光手段と、該像担持体上の潜像を現像する現像手段と、該像担持体の表面をクリーニングするクリーニング手段とを有する画像形成装置の本体に対して着脱可能であり、少なくとも該像担持体と該現像手段とが一体的に支持されたプロセスカートリッジにおいて、
該現像手段が、請求項１〜６のいずれかの現像装置であることを特徴とするプロセスカートリッジ。 An image carrier, a charging unit for charging the surface of the image carrier, an exposure unit for exposing the charged surface of the image carrier to form a latent image, and developing a latent image on the image carrier A process in which at least the image carrier and the developing unit are integrally supported, the developing unit being detachable from the main body of the image forming apparatus having a developing unit and a cleaning unit for cleaning the surface of the image carrier. In the cartridge,
7. A process cartridge, wherein the developing means is the developing device according to claim 1. 像担持体と、該像担持体の表面を帯電する帯電手段と、該像担持体の帯電された表面を露光して潜像を形成する露光手段と、該像担持体上の潜像を現像する現像手段と、該像担持体の表面をクリーニングするクリーニング手段とを有する画像形成装置において、
該現像手段が、請求項１〜６のいずれかの現像装置であることを特徴とする画像形成装置。 An image carrier, a charging unit for charging the surface of the image carrier, an exposure unit for exposing the charged surface of the image carrier to form a latent image, and developing a latent image on the image carrier In an image forming apparatus having a developing means for cleaning and a cleaning means for cleaning the surface of the image carrier,
7. The image forming apparatus according to claim 1, wherein the developing unit is the developing device according to claim 1.
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5874784U (en) * 1981-11-16 1983-05-20 株式会社リコー Voltage application member
JPS63147663A (en) * 1986-12-11 1988-06-20 Toshiba Corp Thermal fixing device
JPH05303263A (en) * 1992-04-27 1993-11-16 Canon Inc Electrostatic charging device and process cartridge using same
JPH06113506A (en) * 1992-09-30 1994-04-22 Matsushita Electric Works Ltd Brush for motor
JPH09211928A (en) * 1996-01-30 1997-08-15 Canon Inc Electrifying device, image forming device and processing cartridge
US5701564A (en) * 1996-09-26 1997-12-23 Xerox Corporation Scavengeless development apparatus including an electroded donor roll having a tri-contact commutator assembly
JP2002258619A (en) * 2001-02-28 2002-09-11 Ricoh Co Ltd Wet image forming device
JP2003084543A (en) * 2001-09-07 2003-03-19 Ricoh Co Ltd Electrification applying device and image forming apparatus equipped with it
JP2004029608A (en) * 2002-06-28 2004-01-29 Hitachi Home & Life Solutions Inc Electrophotographic device
JP2004303513A (en) * 2003-03-31 2004-10-28 Ricoh Co Ltd Power feed member, electrical connection structure, and image formation device
JP2009163158A (en) * 2008-01-10 2009-07-23 Ricoh Co Ltd Electrophotographic photoreceptor, photoreceptor supporting unit, image forming apparatus and process cartridge
JP2011164164A (en) * 2010-02-05 2011-08-25 Ricoh Co Ltd Developing roller driving mechanism and image forming apparatus including the same

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5874784U (en) * 1981-11-16 1983-05-20 株式会社リコー Voltage application member
JPS63147663A (en) * 1986-12-11 1988-06-20 Toshiba Corp Thermal fixing device
JPH05303263A (en) * 1992-04-27 1993-11-16 Canon Inc Electrostatic charging device and process cartridge using same
JPH06113506A (en) * 1992-09-30 1994-04-22 Matsushita Electric Works Ltd Brush for motor
JPH09211928A (en) * 1996-01-30 1997-08-15 Canon Inc Electrifying device, image forming device and processing cartridge
US5701564A (en) * 1996-09-26 1997-12-23 Xerox Corporation Scavengeless development apparatus including an electroded donor roll having a tri-contact commutator assembly
JP2002258619A (en) * 2001-02-28 2002-09-11 Ricoh Co Ltd Wet image forming device
JP2003084543A (en) * 2001-09-07 2003-03-19 Ricoh Co Ltd Electrification applying device and image forming apparatus equipped with it
JP2004029608A (en) * 2002-06-28 2004-01-29 Hitachi Home & Life Solutions Inc Electrophotographic device
JP2004303513A (en) * 2003-03-31 2004-10-28 Ricoh Co Ltd Power feed member, electrical connection structure, and image formation device
JP2009163158A (en) * 2008-01-10 2009-07-23 Ricoh Co Ltd Electrophotographic photoreceptor, photoreceptor supporting unit, image forming apparatus and process cartridge
JP2011164164A (en) * 2010-02-05 2011-08-25 Ricoh Co Ltd Developing roller driving mechanism and image forming apparatus including the same

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