JPH09329960A - Developing device, processing cartridge and image forming device - Google Patents
Developing device, processing cartridge and image forming deviceInfo
- Publication number
- JPH09329960A JPH09329960A JP17054496A JP17054496A JPH09329960A JP H09329960 A JPH09329960 A JP H09329960A JP 17054496 A JP17054496 A JP 17054496A JP 17054496 A JP17054496 A JP 17054496A JP H09329960 A JPH09329960 A JP H09329960A
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- Prior art keywords
- developer
- elastic
- contact
- developing
- toner
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば電子写真複
写機、電子写真プリンターなどとされる画像形成装置に
固定的もしくは着脱自在に具備される現像装置、少なく
とも前記現像装置を含むプロセスカートリッジ、及び前
記プロセスカートリッジが着脱自在の画像形成装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device fixedly or detachably provided in an image forming apparatus such as an electrophotographic copying machine or an electrophotographic printer, a process cartridge including at least the developing device, and The present invention relates to an image forming apparatus in which the process cartridge is detachable.
【０００２】[0002]
【従来の技術】電子写真方式の画像形成装置において
は、像担持体上に形成した静電潜像を、現像装置により
トナー像として可視化することを行なっている。2. Description of the Related Art In an electrophotographic image forming apparatus, an electrostatic latent image formed on an image carrier is visualized as a toner image by a developing device.
【０００３】このような現像装置の一つとして、乾式一
成分現像装置が種々提案されまた実用化されている。し
かし、乾式一成分方式のいずれの現像装置においても現
像剤担持体上に一成分現像剤であるトナーの薄層を形成
するのは困難である。As one of such developing devices, various dry one-component developing devices have been proposed and put into practical use. However, it is difficult to form a thin layer of toner, which is a one-component developer, on the developer carrier in any of the dry one-component developing devices.
【０００４】然るに画像の解像力、鮮明度等の向上が求
められている現在、トナーの薄層形成方法及びその装置
に関する開発は必須となっており、またこれに対して幾
つかの方策が提案されている。However, at present, there is a demand for improvements in image resolution, sharpness, and the like, and development of a method and an apparatus for forming a thin layer of toner is indispensable, and several measures have been proposed for this. ing.
【０００５】例えば特開昭５４−４３０３８号公報に示
されるように、現像剤担持体である現像スリーブにゴム
または金属製の弾性ブレードを当接させ、この弾性ブレ
ードと現像スリーブとの当接部の間にトナーを通過させ
て規制することにより、現像スリーブ上にトナーの薄層
を形成し、かつ当接部での摩擦でトナーに十分なトリボ
を付与させるものである。For example, as disclosed in JP-A-54-43038, an elastic blade made of rubber or metal is brought into contact with a developing sleeve which is a developer carrying member, and an abutting portion between the elastic blade and the developing sleeve. By allowing the toner to pass through the gap between the toner and the toner to regulate the toner, a thin layer of the toner is formed on the developing sleeve, and sufficient tribo is imparted to the toner by friction at the contact portion.
【０００６】この場合、上記の弾性ブレードにより非磁
性トナーを規制するときには、現像スリーブ上にトナー
を供給するトナー供給部材が別途必要になる。これは、
磁性トナーの場合には現像スリーブ内の磁石の磁力によ
り現像スリーブ上にトナーを供給できるが、非磁性トナ
ーの場合には磁力によるトナーの供給が行なえないため
である。In this case, when the non-magnetic toner is regulated by the elastic blade, a toner supply member for supplying the toner onto the developing sleeve is required separately. this is,
This is because in the case of magnetic toner, the toner can be supplied onto the developing sleeve by the magnetic force of the magnet in the developing sleeve, but in the case of non-magnetic toner, the toner cannot be supplied by the magnetic force.
【０００７】そこで非磁性トナーを用いる現像装置とし
て、図９に示すような現像装置５０が提案された。この
従来の現像装置５０では、一成分現像剤として非磁性ト
ナー５３を収容した現像容器５４内に弾性ブレード５１
よりも現像スリーブ５２の回転方向上流側の位置で現像
スリーブ５２に当接するポリウレタンフォーム、スポン
ジ等からなる発泡体、或いはファーブラシを用いた弾性
ローラ５５を設け、矢印Ｄ方向に回転させることにより
現像スリーブ５２上にトナーを供給している。Therefore, a developing device 50 as shown in FIG. 9 has been proposed as a developing device using non-magnetic toner. In this conventional developing device 50, an elastic blade 51 is provided in a developing container 54 containing a non-magnetic toner 53 as a one-component developer.
An elastic roller 55 using a polyurethane foam, a sponge or the like, or a fur brush that comes into contact with the developing sleeve 52 at a position on the upstream side of the developing sleeve 52 in the rotational direction is provided, and the elastic roller 55 is rotated in the direction of arrow D to develop. Toner is supplied onto the sleeve 52.
【０００８】現像スリーブ５２上に供給されたトナー５
３は、現像スリーブ５２の回転に伴い弾性ブレード５１
と現像スリーブ５２の当接部に送られ薄層化され、像担
持体である感光体１上の静電潜像の現像に供される。そ
して、現像スリーブ５２上の現像に消費されずに残存し
たトナー５３は弾性ローラ５５により剥ぎ取られ、且つ
上述したように弾性ローラ５５により新たなトナー５３
が現像スリーブ５２に供給され、上述作用を繰り返す。Toner 5 supplied onto the developing sleeve 52
3 is an elastic blade 51 as the developing sleeve 52 rotates.
And is transferred to the contact portion of the developing sleeve 52 to be thinned, and is used for developing the electrostatic latent image on the photoconductor 1 which is an image carrier. Then, the toner 53 remaining on the developing sleeve 52 without being consumed for the development is peeled off by the elastic roller 55, and as described above, the new toner 53 is released by the elastic roller 55.
Is supplied to the developing sleeve 52, and the above-described operation is repeated.
【０００９】現像容器５４の下部のトナー回収部分には
現像スリーブ５２に対し軽圧当接した可撓性のシール部
材５６を設け、未現像トナーの通過を許容すると共に現
像容器５４内のトナー５３が現像容器５４の下部から漏
出するのを防止している。A flexible seal member 56, which is brought into a slight pressure contact with the developing sleeve 52, is provided in the toner collecting portion below the developing container 54 to allow passage of undeveloped toner and to prevent the toner 53 in the developing container 54 from passing. Is prevented from leaking from the lower part of the developing container 54.
【００１０】このような非磁性トナーを用いた現像装置
５０は、現像スリーブ５２の端部近傍からのトナーの外
部への漏れ出し、いわゆるトナー漏れが生じ易く、画像
形成装置内をトナーで汚す不都合を招き易かった。これ
は非磁性トナーを用いているが故に、磁性トナーを用い
磁界の作用により現像スリーブ表面にトナーを保持でき
易い磁性現像装置とくらべ、磁気的な吸着力を用いるこ
とができないためである。In the developing device 50 using such a non-magnetic toner, the toner leaks out from the vicinity of the end portion of the developing sleeve 52, so-called toner leakage easily occurs, and the inside of the image forming apparatus is contaminated with the toner. Was easy to invite. This is because the non-magnetic toner is used, and thus the magnetic attraction force cannot be used as compared with the magnetic developing device in which the magnetic toner is used and the toner is easily held on the surface of the developing sleeve by the action of the magnetic field.
【００１１】そこで従来の現像装置では、図１０に示す
ように、現像スリーブ５２端部近傍に別途端部シール部
材５７を設けている。図１０は図９の現像装置５０を感
光体１方向から見た図であり、説明の都合上現像スリー
ブ５２を省略し、弾性ブレード５１の現像スリーブ５２
に対する当接ニップを斜線で示してある。Therefore, in the conventional developing device, as shown in FIG. 10, a separate end seal member 57 is provided near the end of the developing sleeve 52. FIG. 10 is a view of the developing device 50 of FIG. 9 viewed from the direction of the photosensitive member 1. For convenience of description, the developing sleeve 52 is omitted, and the developing sleeve 52 of the elastic blade 51 is omitted.
The abutment nip for is shown in slash.
【００１２】図９に示したように現像スリーブ５２の両
端部と現像容器５４開口部との間隙に羊毛フェルト、テ
フロンパイル等の繊維材料やポリウレタンフォーム、ス
ポンジゴム等の発泡体等の材料からなる端部シール部材
５７を設け、現像容器５４と現像スリーブ５２の長手方
向両端部との間からのトナーの漏れ出しを防止し、更に
図１０に示したように端部シール部材５７の側面部が弾
性ブレード５１両端側面部に当接させるように配設した
ことにより、現像ブレード５１の両端部からのトナーの
漏れ出しを防止している。As shown in FIG. 9, the gap between the both ends of the developing sleeve 52 and the opening of the developing container 54 is made of a material such as wool felt, Teflon pile or the like, or polyurethane foam or foam such as sponge rubber. The end seal member 57 is provided to prevent the toner from leaking out between the developing container 54 and the both ends of the developing sleeve 52 in the longitudinal direction. Further, as shown in FIG. By disposing the elastic blade 51 so as to be in contact with both side surface portions, both ends of the developing blade 51 are prevented from leaking toner.
【００１３】上述の構成により、現像スリーブ５２及び
弾性ブレード５１両端部におけるトナー漏れを防止しつ
つ、現像スリーブ５２上に非磁性トナー５３の薄層を良
好に形成することができ、感光体１上の静電潜像を良好
に現像することが可能となった。With the above-described structure, the thin layer of the non-magnetic toner 53 can be satisfactorily formed on the developing sleeve 52 while preventing the toner leakage at both ends of the developing sleeve 52 and the elastic blade 51. It is now possible to satisfactorily develop the electrostatic latent image of.
【００１４】[0014]
【発明が解決しようとする課題】しかしながら、上記従
来の現像装置を用いて、特に高湿環境下において現像動
作を多数回繰り返した場合、現像スリーブ５２の両端部
のトナー層厚が徐々に増加していく現象が生じた。この
結果、現像スリーブ５２の両端部においてトナー層が厚
すぎるが故にトナー５３の帯電が不十分になり、現像動
作時に現像スリーブ５２に現像バイアスとして電圧を印
加した際に現像スリーブ５２両端部から感光体１へトナ
ー５３がカブリとして転移したり、この部分でトナー５
３が飛散する問題が生じた。However, when the conventional developing device is used and the developing operation is repeated a number of times especially in a high humidity environment, the toner layer thickness at both ends of the developing sleeve 52 gradually increases. A phenomenon has occurred. As a result, since the toner layer is too thick at both ends of the developing sleeve 52, the toner 53 is not sufficiently charged, and when a voltage is applied to the developing sleeve 52 as a developing bias during the developing operation, the toner is exposed from both ends of the developing sleeve 52. The toner 53 is transferred to the body 1 as fog, and the toner 5
There was a problem that 3 was scattered.
【００１５】さらにひどい場合は、現像スリーブ５２両
端部でトナー層厚が過大になった部分で現像スリーブ５
２への電気的付着力（鏡映力）が低下し、トナー５３が
現像スリーブ５２表面から外部にこぼれ落ち（トナーボ
タ落ちと称する）、画像形成装置内を著しく汚してしま
う結果を招くことがあった。このトナーボタ落ちは、感
光体１から転写されずに感光体１上に残存した転写残ト
ナーをブレード、ファーブラシ等のクリーニング手段に
よってクリーニングする際に潤滑性が高いことから感光
体の摩耗の少ないなどの利点を有するトナー、すなわち
トナーとして球形であり、かつ表面が平滑であるもの
（形状係数ＳＦ−１が１００〜１８０であり、形状係数
がＳＦ−２が１００〜１４０であるトナー、後で詳述す
る）を用いると特にトナー同士の付着力が弱い故により
顕著に見られた。In the worst case, the developing sleeve 5 is formed at the portions where the toner layer thickness is excessive at both ends of the developing sleeve 52.
In some cases, the electric adhesion force (reflection force) to the toner 2 is reduced, the toner 53 spills from the surface of the developing sleeve 52 to the outside (referred to as toner fluffing), and the inside of the image forming apparatus is significantly soiled. . This toner spillage is low in wear of the photoconductor because the transfer residual toner not transferred from the photoconductor 1 and remaining on the photoconductor 1 is highly lubricated when it is cleaned by a cleaning means such as a blade or a fur brush. A toner having the advantage of, that is, a toner having a spherical shape and a smooth surface (a toner having a shape factor SF-1 of 100 to 180 and a shape factor SF-2 of 100 to 140; The above-mentioned) was particularly noticeable because the adhesion between the toners was weak.
【００１６】この現像スリーブ５２のトナー層厚が過大
になった箇所は、現像スリーブ５２上へのトナー５３の
供給及び未現像トナーの剥ぎ取りを行なう弾性ローラ５
５の両端部外側の現像スリーブ５２に未当接となってい
る部分、すなわち図中点線部Ｌから端部シール５７の側
端部間の領域Ｔに対応しており、この部分のみトナー層
厚が過大になった原因について本発明者等が調べたとこ
ろ以下のことが判明した。At the portion where the toner layer thickness of the developing sleeve 52 becomes excessive, the elastic roller 5 for supplying the toner 53 onto the developing sleeve 52 and peeling off the undeveloped toner.
5 corresponds to a portion which is not in contact with the developing sleeve 52 outside both end portions of 5, i.e., an area T between the dotted line portion L and the side end portion of the end seal 57 in the drawing, and only this portion corresponds to the toner layer thickness. When the present inventors investigated the cause of the excess, the following was found.
【００１７】つまり、弾性ローラ５５の両端部外側にお
いて、弾性ローラ５５の回転に伴いトナーの小循環が発
生しており、常にこの循環しているトナー５３が現像ス
リーブ５２表面に接触することになる。この接触によっ
て摩擦帯電をうけたトナー５３は現像スリーブ５２に鏡
映力によって徐々に付着していくのに対し、この両端部
分では弾性ローラ５５は当接していないことから現像ス
リーブ５２に表面に付着したトナー５３の剥ぎ取りは行
なえない。That is, a small amount of toner is circulated outside the both ends of the elastic roller 55 as the elastic roller 55 rotates, and the circulated toner 53 is always in contact with the surface of the developing sleeve 52. . The toner 53, which has been triboelectrically charged by this contact, gradually adheres to the developing sleeve 52 due to the mirroring force. On the other hand, since the elastic rollers 55 are not in contact with the both ends, the toner 53 adheres to the surface of the developing sleeve 52. The removed toner 53 cannot be peeled off.
【００１８】したがって、弾性ローラ５５の当接部分に
おいてはトナー５３の現像スリーブ５２への供給と剥ぎ
取りが良好に行なわれ、弾性ブレード５１の圧接下を抜
け出したトナーの層厚は適正な厚さに維持されるのに対
し、この両端の弾性ローラ５５の未当接部分において
は、現像スリーブ５２へのトナー５３の供給のみが行な
われ、剥ぎ取りが行なわれないことから弾性ブレード５
１の圧接下で規制しきれなくなる。この結果、この現像
スリーブ５２の両端の弾性ローラ５５の未当接部分では
徐々にトナー層厚が増加することになるのである。Therefore, at the contact portion of the elastic roller 55, the toner 53 is satisfactorily supplied to the developing sleeve 52 and peeled off, and the layer thickness of the toner that has come out under the pressure contact of the elastic blade 51 is a proper thickness. On the other hand, in the non-contact portions of the elastic rollers 55 at both ends, only the toner 53 is supplied to the developing sleeve 52, and the developing roller 52 is not peeled off.
It becomes impossible to regulate under pressure contact of 1. As a result, the toner layer thickness gradually increases at the non-contact portions of the elastic rollers 55 at both ends of the developing sleeve 52.
【００１９】この対策として弾性ローラ５５の現像スリ
ーブ５２への未当接部分をなくすことが考えられ、その
ためには、図１１に示したように現像容器５４の開口部
の長手方向の内側の壁面及び端部シール部材５７の側面
に、弾性ローラ５８の両端部側面に当接させる必要があ
る。As a countermeasure against this, it is conceivable to eliminate a portion of the elastic roller 55 which is not in contact with the developing sleeve 52. For that purpose, as shown in FIG. 11, a wall surface inside the opening of the developing container 54 in the longitudinal direction. It is necessary to bring the side surfaces of the end seal member 57 into contact with the side surfaces of both ends of the elastic roller 58.
【００２０】しかしながら、このように弾性ローラ５８
の側端部を現像容器５４の内壁に当接させると、弾性ロ
ーラ５８の回転により徐々に弾性ローラ５８の側端部と
現像容器５４の内壁間にトナー５３がわずかずつ侵入
し、この部分に挟まれたトナー５３は逃げ場を失い常に
摺擦されることになる。そのため現像動作を繰り返す
と、弾性ローラ５８の側端部と現像容器５４の内壁間に
トナー５３の凝集塊が発生し、弾性ブレード５１と現像
スリーブ５２との当接ニップ内に入り込み、現像スリー
ブ５２上に白スジが生じたり、凝集塊によって弾性ブレ
ード５１が持ち上げられ上記白スジ部分の隣接部でのト
ナー５３の規制が行なえなくなりこの部分のトナー層厚
が過大となる現象を生じた。However, as described above, the elastic roller 58
When the side end of the developing container 54 is brought into contact with the inner wall of the developing container 54, the toner 53 gradually enters between the side end of the elastic roller 58 and the inner wall of the developing container 54 due to the rotation of the elastic roller 58, and enters into this part. The sandwiched toner 53 loses its escape area and is constantly rubbed. Therefore, when the developing operation is repeated, an aggregate of toner 53 is generated between the side end of the elastic roller 58 and the inner wall of the developing container 54, and enters into the contact nip between the elastic blade 51 and the developing sleeve 52, and the developing sleeve 52. White stripes are generated on the upper side, or the elastic blade 51 is lifted by the agglomerate, so that the toner 53 cannot be regulated in the adjacent portion of the white stripe portion, and the toner layer thickness in this portion becomes excessive.
【００２１】その結果、原因は異なるが、従来と同様に
現像時に現像スリーブ５２両端部から感光体１へトナー
５３がカブリとして転移したり、この部分でトナーが飛
散したりボタ落ちしたりする問題が発生してしまう不都
合が防ぎきれなかった。As a result, although the cause is different, the toner 53 may be transferred as fog from the both ends of the developing sleeve 52 to the photoconductor 1 at the time of development, or the toner may be scattered or fluttered at this portion as in the conventional case. However, the inconvenience of occurrence of could not be prevented.
【００２２】また対策として、弾性ブレード５１の長手
方向の長さを弾性ローラ５５より短くする構成も考えら
れるが、この場合弾性ブレード５１の両端部外側の現像
スリーブ５２に対する未当接部分でのトナーシールが困
難になる。なぜなら現像スリーブ５２に対するこの弾性
ブレード５１の両端部外側の未当接部分では弾性ローラ
５５からの現像スリーブ５２上へのトナー供給が常に行
なわれているからである。As a countermeasure, the length of the elastic blade 51 in the longitudinal direction may be shorter than that of the elastic roller 55. In this case, the toner is not applied to the developing sleeve 52 outside the both ends of the elastic blade 51. Sealing becomes difficult. This is because the toner is always supplied from the elastic roller 55 onto the developing sleeve 52 at the non-contact portions on the outer sides of both ends of the elastic blade 51 with respect to the developing sleeve 52.
【００２３】そこで、ここに別途シール部材を設ける必
要があるが、端部シール部材５７と同様の例えば羊毛フ
ェルト、テフロンパイル等の繊維材料やポリウレタンフ
ォーム、スポンジゴム等の発泡体等の材料からなるシー
ル部材を現像スリーブ５２表面に当接するように設けて
も、現像スリーブ５２の回転に伴いトナーが常時このシ
ール部材と現像スリーブ５２間に送られ、詰まることに
なる。そのため、シール部材は表面がすぐさまトナーで
おおわれシール性が低下し、結局トナーが外部に漏れ出
てしまったり、ここで大量に発生した凝集塊がそこに隣
接する弾性ブレード５１の端部に伝わると白スジが発生
する等の不都合を生じてしまうのである。Therefore, it is necessary to provide a separate sealing member here, but it is made of the same material as the end sealing member 57, for example, a fiber material such as wool felt or Teflon pile, or a material such as polyurethane foam or foam such as sponge rubber. Even if the seal member is provided so as to be in contact with the surface of the developing sleeve 52, the toner is always sent between the seal member and the developing sleeve 52 as the developing sleeve 52 rotates and becomes clogged. Therefore, the surface of the seal member is immediately covered with the toner and the sealing property is deteriorated, and eventually the toner leaks to the outside, or when a large amount of aggregated particles are transmitted to the end of the elastic blade 51 adjacent thereto. This causes inconvenience such as white stripes.
【００２４】従って、本発明の目的は、現像剤担持体の
長手方向両端部、特に弾性ローラ未当接部分において、
現像時に、像担持体へのトナーのカブリ、トナーの飛
散、及びボタ落ちの発生を防止できると共に弾性規制ブ
レードによる現像剤担持体上のトナー薄層を安定して良
好に形成し得る現像装置、この現像装置を備えたプロセ
スカートリッジ、及びこのプロセスカートリッジを備え
た画像形成装置を提供することである。Therefore, an object of the present invention is to provide the developer carrying member at both longitudinal end portions thereof, particularly at the portions not contacting the elastic roller.
At the time of development, a developing device capable of preventing toner fog on the image bearing member, scattering of toner, and occurrence of fluffing, and capable of stably and favorably forming a thin toner layer on the developer bearing member by an elastic regulation blade, A process cartridge including the developing device, and an image forming apparatus including the process cartridge.
【００２５】[0025]
【課題を解決するための手段】上記目的は本発明に係る
現像装置、プロセスカートリッジ及び画像形成装置にて
達成される。要約すれば、本発明は、非磁性一成分現像
剤を収容する現像容器と、該現像容器の開口部に延在し
回動する現像剤担持体と、該現像剤担持体に対し現像剤
を介して所定の面が当接した弾性規制ブレードと、該弾
性規制ブレードの前記現像剤担持体との当接部に対し、
前記現像剤担持体の回転方向上流側に当接して設けられ
た回転可能な弾性ローラと、前記現像剤担持体の長手方
向両端部と前記現像容器の開口部との間隙に設けられた
端部シール部材とを有する現像装置において、前記現像
容器開口部の両端部内壁と前記弾性ローラの長手方向側
端部とは間隙を有し、前記弾性規制ブレードの前記現像
剤担持体との当接ニップは、前記弾性ローラの前記現像
剤担持体との当接ニップよりも前記現像剤担持体長手方
向の外側に亙り形成され、少なくとも前記現像剤担持体
の前記弾性ローラの未当接部の周面上における前記弾性
規制ブレードの前記現像剤担持体との当接部にて、前記
弾性規制ブレードの当接ニップから前記現像剤担持体回
転方向上流側の先端までの距離が他の部分に比べ短くな
るように構成したことを特徴とする現像装置である。The above object can be achieved by a developing device, a process cartridge and an image forming apparatus according to the present invention. In summary, the present invention is directed to a developer container containing a non-magnetic one-component developer, a developer carrier extending into an opening of the developer container and rotating, and a developer for the developer carrier. With respect to the elastic regulation blade a predetermined surface of which is in contact with, and the contact portion of the developer carrying member of the elastic regulation blade,
A rotatable elastic roller provided in contact with an upstream side of the developer carrying member in the rotational direction, and an end portion provided in a gap between both longitudinal end portions of the developer carrying member and the opening of the developing container. In a developing device having a seal member, there is a gap between inner walls of both ends of the opening of the developing container and an end of the elastic roller in a longitudinal direction, and an abutting nip between the elastic regulation blade and the developer carrier. Is formed over the outer side of the elastic roller in the longitudinal direction of the developer carrying body with respect to the contact nip with the developer carrying body, and at least the peripheral surface of the non-contacting portion of the developer carrying body of the elastic roller. At the contact portion of the elastic regulating blade with the developer carrying body above, the distance from the contact nip of the elastic regulating blade to the tip on the upstream side in the rotation direction of the developer carrying body is shorter than other portions. Configured to be A developing apparatus is characterized and.
【００２６】本発明による他の態様によれば、非磁性一
成分現像剤を収容する現像容器と、該現像容器の開口部
に延在し回動する現像剤担持体と、該現像剤担持体に対
し現像剤を介して当接した弾性規制ブレードと、該弾性
規制ブレードの前記現像剤担持体との当接部に対し前記
現像剤担持体の回転方向上流側に当接して設けられた回
転可能な弾性ローラと、前記現像剤担持体の長手方向両
端部と前記現像容器の開口部との間隙に設けられた端部
シール部材とを有する現像装置において、前記現像容器
開口部の両端部内壁と前記弾性ローラの長手方向側端部
とは間隙を有し、前記弾性規制ブレードの前記現像剤担
持体との当接ニップは、前記弾性ローラの前記現像剤担
持体との当接ニップよりも前記現像剤担持体長手方向の
外側に亙り形成され、少なくとも前記現像剤担持体の前
記弾性ローラの未当接部の周面上における前記弾性規制
ブレードの前記現像剤担持体との当接部にて、前記弾性
規制ブレードの前記現像剤担持体への当接圧が他の部分
に比べ高くなるように構成したことを特徴とする現像装
置である。According to another aspect of the present invention, a developer container containing a non-magnetic one-component developer, a developer carrier extending into an opening of the developer container and rotating, and the developer carrier. An elastic regulating blade that is in contact with the developer bearing member via a developer, and a rotation provided by abutting on the upstream side in the rotational direction of the developer bearing member with respect to the contact portion of the elastic regulating blade with the developer bearing member. In a developing device having a possible elastic roller and end seal members provided in a gap between both ends in the longitudinal direction of the developer carrier and the opening of the developing container, inner walls of both ends of the opening of the developing container And a longitudinal side end of the elastic roller has a gap, and an abutting nip of the elastic regulating blade with the developer carrying body is larger than an abutting nip of the elastic roller with the developer carrying body. The developer carrier is formed over the outer side in the longitudinal direction. , At least at the contact portion of the elastic regulation blade with the developer bearing body on the peripheral surface of the non-contact portion of the elastic roller of the developer bearing body, to the developer bearing body of the elastic regulation blade. The developing device is characterized in that the contact pressure thereof is higher than that of other portions.
【００２７】前記現像剤担持体の前記弾性ローラの未当
接部の周面上における前記弾性規制ブレードの前記現像
剤担持体との当接部において、前記弾性規制ブレードに
加圧部材を設けることが好ましい。A pressing member is provided on the elastic regulating blade at the contact portion of the elastic regulating blade with the developer supporting body on the peripheral surface of the non-contact portion of the elastic roller of the developer supporting body. Is preferred.
【００２８】本発明による他の態様によれば、非磁性一
成分現像剤を収容する現像容器と、該現像容器の開口部
に延在し回動する現像剤担持体と、該現像剤担持体に対
し現像剤を介して当接した弾性規制ブレードと、該弾性
規制ブレードの前記現像剤担持体との当接部に対し前記
現像剤担持体の回転方向上流側に当接して設けられた回
転可能な弾性ローラと、前記現像剤担持体の長手方向両
端部と前記現像容器の開口部との間隙に設けられた端部
シール部材とを有する現像装置において、前記現像容器
開口部の両端部内壁と前記弾性ローラの長手方向側端部
とは間隙を有し、前記弾性規制ブレードの前記現像剤担
持体との当接ニップは、前記弾性ローラの前記現像剤担
持体との当接ニップよりも前記現像剤担持体長手方向の
外側に亙り形成され、少なくとも前記現像剤担持体の前
記弾性ローラの未当接部の周面上における前記弾性規制
ブレードの前記現像剤担持体との当接部にて、前記弾性
規制ブレードの前記現像剤担持体との当接部での表面粗
さが他の部分に比べ小さくなるように構成したことを特
徴とする現像装置が提供される。According to another aspect of the present invention, a developer container containing a non-magnetic one-component developer, a developer carrier extending into an opening of the developer container and rotating, and the developer carrier. An elastic regulating blade that is in contact with the developer bearing member via a developer, and a rotation provided by abutting on the upstream side in the rotational direction of the developer bearing member with respect to the contact portion of the elastic regulating blade with the developer bearing member. In a developing device having a possible elastic roller and end seal members provided in a gap between both ends in the longitudinal direction of the developer carrier and the opening of the developing container, inner walls of both ends of the opening of the developing container And a longitudinal side end of the elastic roller has a gap, and an abutting nip of the elastic regulating blade with the developer carrying body is larger than an abutting nip of the elastic roller with the developer carrying body. The developer carrier is formed over the outer side in the longitudinal direction. , At least at the contact portion of the elastic regulation blade with the developer bearing body on the peripheral surface of the non-contact portion of the elastic roller of the developer bearing body, with the developer bearing body of the elastic regulation blade. There is provided a developing device characterized in that the surface roughness at the abutting portion of is smaller than that of other portions.
【００２９】本発明による他の態様によれば、非磁性一
成分現像剤を収容する現像容器と、該現像容器の開口部
に延在し回動する現像剤担持体と、該現像剤担持体に対
し現像剤を介して当接した弾性規制ブレードと、該弾性
規制ブレードの前記現像剤担持体との当接部に対し前記
現像剤担持体の回転方向上流側に当接して設けられた回
転可能な弾性ローラと、前記現像剤担持体の長手方向両
端部と前記現像容器の開口部との間隙に設けられた端部
シール部材とを有する現像装置において、前記現像容器
開口部の両端部内壁と前記弾性ローラの長手方向側端部
とは間隙を有し、前記弾性規制ブレードの前記現像剤担
持体との当接ニップは、前記弾性ローラの前記現像剤担
持体との当接ニップよりも前記現像剤担持体長手方向の
外側に亙り形成され、少なくとも前記現像剤担持体の前
記弾性ローラの当接部の外側の未当接部と前記端部シー
ル当接部の内側に挟まれた領域の周面上における帯電能
を、他の部分に比べ大きくなるようにしたことを特徴と
する現像装置が提供される。According to another aspect of the present invention, a developer container containing a non-magnetic one-component developer, a developer carrier extending into the opening of the developer container and rotating, and the developer carrier. An elastic regulating blade that is in contact with the developer bearing member via a developer, and a rotation provided by abutting on the upstream side in the rotational direction of the developer bearing member with respect to the contact portion of the elastic regulating blade with the developer bearing member. In a developing device having a possible elastic roller and end seal members provided in a gap between both ends in the longitudinal direction of the developer carrier and the opening of the developing container, inner walls of both ends of the opening of the developing container And a longitudinal side end of the elastic roller has a gap, and an abutting nip of the elastic regulating blade with the developer carrying body is larger than an abutting nip of the elastic roller with the developer carrying body. The developer carrier is formed over the outer side in the longitudinal direction. , At least the chargeability on the peripheral surface of the area between the non-contact portion outside the contact portion of the elastic roller of the developer carrier and the inside of the end seal contact portion is A developing device is provided which is characterized in that it is made larger.
【００３０】また、本発明による他の態様によれば、非
磁性一成分現像剤を収容する現像容器と、該現像容器の
開口部に延在し回動する現像剤担持体と、該現像剤担持
体に対し現像剤を介して当接した弾性規制ブレードと、
該弾性規制ブレードの前記現像剤担持体との当接部に対
し前記現像剤担持体の回転方向上流側に当接して設けら
れた回転可能な弾性ローラと、前記現像剤担持体の長手
方向両端部と前記現像容器の開口部との間隙に設けられ
た端部シール部材とを有する現像装置において、前記現
像容器開口部の両端部内壁と前記弾性ローラの長手方向
側端部とは間隙を有し、前記弾性規制ブレードの前記現
像剤担持体との当接ニップは、前記弾性ローラの前記現
像剤担持体との当接ニップよりも前記現像剤担持体長手
方向の外側に亙り形成され、少なくとも前記現像剤担持
体の前記弾性ローラの当接部の外側の未当接部と前記端
部シール当接部の内側に挟まれた領域の周面上に当接す
るようにトナー掻き落とし部材を別途設けたことを特徴
とする現像装置である。According to another aspect of the present invention, a developer container containing a non-magnetic one-component developer, a developer carrier extending into the opening of the developer container and rotating, and the developer are provided. An elastic restriction blade that is in contact with the carrier via the developer,
A rotatable elastic roller provided in contact with the contact portion of the elastic restriction blade with the developer carrying member on the upstream side in the rotation direction of the developer carrying member, and both longitudinal ends of the developer carrying member. In the developing device having an end seal member provided in the gap between the opening and the opening of the developing container, there is a gap between the inner walls of both ends of the opening of the developing container and the end of the elastic roller in the longitudinal direction. However, the contact nip of the elastic restriction blade with the developer carrying member is formed over the outer side in the longitudinal direction of the developer carrying member with respect to the contact nip of the elastic roller with the developer carrying member. A toner scraping member is separately provided so as to come into contact with the peripheral surface of the area sandwiched between the non-contact portion outside the contact portion of the elastic roller of the developer carrier and the inside of the end seal contact portion. With the developing device characterized by being provided That.
【００３１】好ましくは、前記非磁性一成分現像剤の形
状係数ＳＦ−１が１００〜１８０であり、形状係数ＳＦ
−２が１００〜１４０である。Preferably, the shape factor SF-1 of the non-magnetic one-component developer is 100 to 180, and the shape factor SF is
-2 is 100 to 140.
【００３２】本発明による他の態様によれば、少なくと
も上記の記載の現像装置と、帯電装置と、像担持体クリ
ーニングブレードと、廃トナー収容容器とを一体的に備
え、画像形成装置に着脱自在としたことを特徴とするプ
ロセスカートリッジが提供される。According to another aspect of the present invention, at least the developing device described above, a charging device, an image carrier cleaning blade, and a waste toner container are integrally provided, and can be detachably attached to the image forming apparatus. A process cartridge characterized by the above is provided.
【００３３】また、本発明による他の態様によれば、少
なくとも上記の現像装置を固定的にもしくは着脱自在に
具備したことを特徴とする画像形成装置が提供される。According to another aspect of the present invention, there is provided an image forming apparatus including at least the developing device fixedly or detachably.
【００３４】[0034]
【発明の実施の形態】以下、本発明に係る現像装置、プ
ロセスカートリッジ及び画像形成装置を図面に則して更
に詳しく説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The developing device, process cartridge and image forming apparatus according to the present invention will be described in more detail with reference to the drawings.
【００３５】実施例１ 以下に実施例１を図１〜図３に基づいて説明する。図１
に示す画像形成装置において、像担持体としての感光ド
ラム１は、矢印Ａ方向に回転し、感光ドラム１を帯電処
理するための帯電装置２によって一様に帯電され、感光
ドラム１に静電潜像を書き込む露光手段であるレーザー
光３により、その表面に静電潜像が形成される。Example 1 Example 1 will be described below with reference to FIGS. 1 to 3. FIG.
In the image forming apparatus shown in FIG. 1, the photosensitive drum 1 as an image carrier rotates in the direction of arrow A, is uniformly charged by the charging device 2 for charging the photosensitive drum 1, and the photosensitive drum 1 has an electrostatic latent image. An electrostatic latent image is formed on the surface by the laser beam 3 which is an exposure unit for writing an image.
【００３６】この静電潜像を、感光ドラム１に対して近
接配置され、プロセスカートリッジとして画像形成装置
に対し着脱可能である現像装置４によって現像し、トナ
ー像として可視化する。なお、本実施例では露光部にト
ナー像を形成するいわゆる反転現像を行なっている。This electrostatic latent image is developed by a developing device 4 which is disposed close to the photosensitive drum 1 and which is detachable from the image forming apparatus as a process cartridge and visualized as a toner image. In this embodiment, so-called reversal development for forming a toner image on the exposed portion is performed.
【００３７】可視化された感光ドラム１上のトナー像
は、転写ローラ９によって記録媒体である紙１３に転写
され、転写されずに感光ドラム１上に残存した転写残ト
ナーはクリーニングブレード１０により掻き取られて廃
トナー容器１１に収納され、クリーニングされた感光ド
ラム１は上述作用を繰り返し、画像形成を行なう。The visualized toner image on the photosensitive drum 1 is transferred onto the paper 13 which is a recording medium by the transfer roller 9, and the transfer residual toner remaining on the photosensitive drum 1 without being transferred is scraped off by the cleaning blade 10. The photosensitive drum 1 which has been stored in the waste toner container 11 and cleaned has the above-described operation repeated to form an image.
【００３８】一方、トナー像を転写された紙１３は定着
装置１２により定着処理され、装置外に排紙されプリン
ト動作が終了する。On the other hand, the paper 13 on which the toner image has been transferred is fixed by the fixing device 12 and discharged outside the device to complete the printing operation.
【００３９】次に現像装置４について図２に基づいてさ
らに説明する。同図において、現像装置４は、一成分現
像剤として非磁性トナー８を収容した現像容器１４と、
現像容器１４内の長手方向に延在する開口部に位置し、
感光ドラム１と対向設置された現像剤担持体としての現
像スリーブ５とを備え、感光ドラム１上の静電潜像を現
像して可視化するようになっている。Next, the developing device 4 will be further described with reference to FIG. In the figure, the developing device 4 includes a developing container 14 containing a non-magnetic toner 8 as a one-component developer,
Located in the opening extending in the longitudinal direction in the developing container 14,
The photosensitive drum 1 and the developing sleeve 5 as a developer bearing member, which is installed opposite to the photosensitive drum 1, are provided to develop and visualize the electrostatic latent image on the photosensitive drum 1.
【００４０】現像スリーブ５は、上記開口部にて図に示
す右略半周面を現像容器１４内に突入し、左略半周面を
現像容器１４外に露出して横設されている。この現像容
器１４外へ露出した面は、現像装置４の左方に位置する
感光ドラム１にわずかな微小間隔を有して対向してい
る。The developing sleeve 5 has a right half-peripheral surface shown in the drawing projecting into the developing container 14 at the opening, and a left substantially half-peripheral surface is exposed to the outside of the developing container 14 and is horizontally provided. The surface exposed to the outside of the developing container 14 faces the photosensitive drum 1 located on the left side of the developing device 4 with a small interval.
【００４１】また現像スリーブ５は、矢印Ｂ方向に回転
駆動され、その表面がトナー８との摺擦確率を高くし、
かつ、トナー８の搬送を良好に行なうための適度な凹凸
を有しており、本実施例においては、直径１６ｍｍのア
ルミニウム製スリーブ表面にガラスビーズ（＃６００）
による定形ブラスト処理を施し、表面粗さＲｚが約３μ
ｍとしたものを用い、感光ドラム１との間隙が３００μ
ｍになるように対向し、さらに感光ドラム１の周速５０
ｍｍ／ｓに対して若干早めた周速８０ｍｍ／ｓで回転さ
せている。Further, the developing sleeve 5 is rotationally driven in the direction of arrow B, and the surface thereof has a high probability of rubbing against the toner 8,
In addition, the toner particles 8 have appropriate unevenness for favorably carrying the toner 8. In this embodiment, glass beads (# 600) are formed on the surface of an aluminum sleeve having a diameter of 16 mm.
The surface roughness Rz is about 3μ after the standard blast treatment by
m, and the gap with the photosensitive drum 1 is 300μ
and the peripheral speed of the photosensitive drum 1 is 50
It is rotated at a peripheral speed of 80 mm / s which is slightly faster than mm / s.
【００４２】この現像スリーブ５両端部からのトナー漏
れを防止するために、端部シール部材１９が現像容器１
４の開口部に設けられ、現像スリーブ５の両端部をシー
ルしている。In order to prevent toner from leaking from both ends of the developing sleeve 5, the end seal member 19 is provided in the developing container 1.
It is provided in the opening of No. 4 and seals both ends of the developing sleeve 5.
【００４３】本発明に係るこの端部シール部材１９を含
めた現像スリーブ５長手方向の両端部のトナーシール構
成に関して後に詳述する。The toner seal structure of the both ends in the longitudinal direction of the developing sleeve 5 including the end seal member 19 according to the present invention will be described in detail later.
【００４４】現像スリーブ５の上方位置には、ウレタ
ン、シリコン等のゴム材料か、バネ弾性を有するＳＵＳ
またはリン青銅の金属薄板からなる弾性規制ブレード
（以下、弾性ブレードと称する）７が、ブレード支持板
金１５に支持され、自由端側の先端近傍を現像スリーブ
５の外周面に面接触にて当接されるよう設けられてお
り、当接方向としては、当接部に対して先端側が現像ス
リーブ５の回転方向上流側に位置するいわゆるカウンタ
ー方向とされている。At a position above the developing sleeve 5, a rubber material such as urethane or silicon, or SUS having spring elasticity is used.
Alternatively, an elastic regulating blade (hereinafter referred to as an elastic blade) 7 made of a thin metal plate of phosphor bronze is supported by the blade supporting sheet metal 15, and the vicinity of the free end side tip is brought into surface contact with the outer peripheral surface of the developing sleeve 5. The contact direction is a so-called counter direction in which the front end side is located on the upstream side in the rotation direction of the developing sleeve 5 with respect to the contact portion.
【００４５】本実施例において弾性ブレード７は、厚さ
１．０ｍｍの板状のウレタンゴムをブレード支持板金１
５に接着した構成になっており、現像スリーブ５に対す
る当接圧は３０ｇ／ｃｍに設定した。なお線圧の測定
は、摩擦係数が既知の金属薄板を３枚当接部に挿入し、
中央の１枚をバネばかりで引抜いた値から換算した。こ
の弾性ブレード７の本実施例における長手方向両端部の
構成に関しても後に詳述する。In this embodiment, the elastic blade 7 is made of a plate-shaped urethane rubber having a thickness of 1.0 mm and is made of a blade supporting sheet metal 1.
5, and the contact pressure with respect to the developing sleeve 5 was set to 30 g / cm. The linear pressure is measured by inserting three thin metal plates with known friction coefficients into the contact parts,
It was converted from the value obtained by pulling out the central piece with a spring. The configuration of both ends of the elastic blade 7 in the longitudinal direction in this embodiment will also be described in detail later.
【００４６】また弾性ローラ６が、弾性ブレード７の現
像スリーブ５表面との当接部に対し現像スリーブ５回転
方向上流側に当接され、かつ回転可能に支持されてい
る。弾性ローラ６の構造としては、発泡骨格状スポンジ
構造や芯金状にレーヨン、ナイロン等の繊維を植毛した
ファーブラシ構造のものが現像スリーブ５へのトナー８
の供給及び未現像トナーの剥ぎ取りの点から好ましく、
本実施例においては、芯金上にポリウレタンフォームを
設けた直径１２ｍｍの弾性ローラ６を用いた。The elastic roller 6 is rotatably supported in contact with the contact portion of the elastic blade 7 with the surface of the developing sleeve 5 on the upstream side in the rotating direction of the developing sleeve 5. As the structure of the elastic roller 6, a foam skeletal sponge structure or a fur brush structure in which fibers such as rayon and nylon are planted in a core metal shape is used as the toner 8 for the developing sleeve 5.
Is preferable from the viewpoint of supply of toner and stripping of undeveloped toner,
In this example, an elastic roller 6 having a diameter of 12 mm, in which polyurethane foam was provided on a core metal, was used.
【００４７】この弾性ローラ６の現像スリーブ５に対す
る当接幅としては、１〜８ｍｍが有効で、また現像スリ
ーブ５に対してその当接部において相対速度を持たせる
ことが好ましく、本実施例においては、当接幅を３ｍｍ
に設定し、弾性ローラ６の周速として現像動作時に５０
ｍｍ／ｓ（現像スリーブ５との相対速度は１３０ｍｍ／
ｓ）となるように不図示の駆動手段により所定タイミン
グで回転駆動させた。The contact width of the elastic roller 6 with respect to the developing sleeve 5 is preferably 1 to 8 mm, and it is preferable that the contacting portion has a relative speed with respect to the developing sleeve 5. In this embodiment. Has a contact width of 3 mm
Is set to 50, and the peripheral speed of the elastic roller 6 is set to 50 during the developing operation.
mm / s (Relative speed with developing sleeve 5 is 130 mm / s
s) was driven to rotate at a predetermined timing by a driving unit (not shown).
【００４８】トナー８は、非磁性一成分現像剤であり、
前述したように転写性にすぐれ、且つ転写されずに感光
ドラム１上に残存した転写残トナーをブレード、ファー
ブラシ等のクリーニング手段によってクリーニングする
際に潤滑性が高いことから感光ドラム１の摩耗の少ない
などの利点を有するトナー、すなわちトナーとして球形
でありかつ表面が平滑であるものを用いている。具体的
には形状係数として、ＳＦ−１が１００〜１８０であ
り、ＳＦ−２が１００〜１４０であるものを用いてい
る。Toner 8 is a non-magnetic one-component developer,
As described above, the transfer residual toner, which has excellent transferability and remains on the photosensitive drum 1 without being transferred, is highly lubricated when it is cleaned by a cleaning unit such as a blade or a fur brush. A toner having advantages such as a small amount, that is, a toner having a spherical shape and a smooth surface is used. Specifically, the shape factors used are SF-1 of 100 to 180 and SF-2 of 100 to 140.
【００４９】このＳＦ−１、ＳＦ−２は、日立製作所Ｆ
Ｅ−ＳＥＭ（Ｓ−８００）を用いトナー像を無作為に１
００個サンプリングし、その画像情報をインターフェー
スを介してニコレ社製画像解析装置（Ｌｕｚｅｘ３）に
導入し解析を行ない下式より算出し得られた値を定義し
ている。These SF-1 and SF-2 are Hitachi F
Randomly toner image 1 using E-SEM (S-800)
00 values are sampled, the image information is introduced into an image analysis device (Luzex3) manufactured by Nikole Co., Ltd. through an interface, analysis is performed, and a value obtained by calculation by the following formula is defined.
【００５０】ＳＦ−１＝｛（ＭＸＬＮＧ）2 ／ＡＲＥ
Ａ｝×（π／４）×１００ ＳＦ−２＝｛（ＰＥＲＩ）2 ／ＡＲＥＡ｝×（π／４）
×１００ （ＭＸＬＮＧ：絶対最大長、ＡＲＥＡ：トナー投影面
積、ＰＥＲＩ：周長） このトナーの形状係数ＳＦ−１は球形度合を示し、１０
０から大きくなるにつれて球形から徐々に不定形とな
る。ＳＦ−２は凹凸度合を示し、１００から大きくなる
につれてトナーの表面の凹凸が顕著になる。SF-1 = {(MXLNG) 2 / ARE
A｝ × (π / 4) × 100 SF-2 = {(PERI) 2 / AREA} × (π / 4)
× 100 (MXLNG: Absolute maximum length, AREA: Toner projected area, PERI: Perimeter) The shape factor SF-1 of this toner indicates a spherical degree, and 10
As it increases from 0, it gradually changes from a spherical shape to an amorphous shape. SF-2 indicates the degree of unevenness, and the unevenness on the surface of the toner becomes more remarkable as the value increases from 100.
【００５１】トナーの製造方法としては、トナーが上記
形状係数の範囲内になれば、いわゆる粉砕方法による製
造方法の他に、特開昭３６−１０２３１号公報、特開昭
５９−５３８５６号公報に述べられている懸濁重合方法
を用いて直接トナーを生成する方法や、単量体には可溶
で得られる重合体が不溶な水系有機溶剤を用い、直接ト
ナーを生成する分散重合方法又は水溶性極性開始剤存在
下で直接重合しトナーを生成するソープフリー重合方法
に代表される乳化重合方法等を用いてトナーを製造する
ことは可能である。As the method for producing the toner, if the toner is in the range of the above-mentioned shape factor, in addition to the production method by the so-called pulverization method, there are disclosed in Japanese Patent Laid-Open Nos. 36-10231 and 59-53856. A method of directly producing a toner by using the suspension polymerization method described above, or a dispersion polymerization method or a water-soluble method of directly producing a toner by using a water-soluble organic solvent in which the obtained polymer is insoluble as a monomer. It is possible to produce a toner by using an emulsion polymerization method typified by a soap-free polymerization method in which a toner is directly polymerized in the presence of a polar polar initiator to produce a toner.
【００５２】本実施例においては、トナーの形状係数Ｓ
Ｆ−１を１００〜１８０に、ＳＦ−２を１００〜１４０
に容易にコントロールでき、比較的容易に粒度分布がシ
ャープで４〜８μｍ粒径の微粒子トナーが得られる常圧
下での、または加圧下での懸濁重合方法を用い、モノマ
ーとしてスチレンとｎ−ブチルアクリレート、荷電制御
剤としてサリチル酸金属化合物、極性レジンとして飽和
ポリエステル、さらに着色剤を加え、重量平均粒径７μ
ｍの着色懸濁粒子を製造した。In the present embodiment, the toner shape factor S
F-1 to 100-180, SF-2 to 100-140
The suspension polymerization method under normal pressure or under pressure can be used to obtain a fine particle toner having a sharp particle size distribution and a particle size distribution of 4 to 8 μm. Acrylate, salicylic acid metal compound as a charge control agent, saturated polyester as a polar resin, and a colorant are added, and a weight average particle diameter of 7 μm
m colored suspended particles were produced.
【００５３】そして、これに疎水性シリカを１．５ｗｔ
％外添することによって、前述したような転写性に優
れ、感光ドラム１のクリーニング時における摩耗の少な
い負極性のトナー８を製造した。Then, 1.5 wt% of hydrophobic silica is added to this.
% By external addition, a negative-polarity toner 8 having excellent transferability as described above and less wear during cleaning of the photosensitive drum 1 was manufactured.
【００５４】以上のような本現像装置４においては、現
像動作時に、現像容器１４内のトナー８が、撹拌部材１
６の矢印Ｃ方向の回転に伴い弾性ローラ６方向に送られ
る。In the main developing device 4 as described above, the toner 8 in the developing container 14 is agitated by the stirring member 1 during the developing operation.
With the rotation of 6 in the direction of arrow C, the elastic roller 6 is fed in the direction of 6.
【００５５】次にこのトナー８は弾性ローラ６が矢印Ｄ
方向に回転することにより、現像スリーブ５近傍に運ば
れ、現像スリーブ５と弾性ローラ６との当接部におい
て、弾性ローラ６上に担持されているトナー８が現像ス
リーブ５と摺擦されることによって、摩擦帯電を受け、
現像スリーブ５上に付着する。Next, as for this toner 8, the elastic roller 6 has an arrow D.
By being rotated in the direction, the toner 8 carried to the vicinity of the developing sleeve 5 and the toner 8 carried on the elastic roller 6 is rubbed against the developing sleeve 5 at the contact portion between the developing sleeve 5 and the elastic roller 6. Is subject to triboelectric charging,
It adheres on the developing sleeve 5.
【００５６】その後、現像スリーブ５の矢印Ｂ方向の回
転に伴い、弾性ブレード７の圧接下に送られ、ここで適
正なトリボ（摩擦帯電量）をうけるとともに現像スリー
ブ５上に薄層形成された後、感光ドラム１との対向部で
ある現像部へ搬送される。After that, as the developing sleeve 5 rotates in the direction of arrow B, the developing sleeve 5 is sent under pressure contact with the elastic blade 7, where it receives an appropriate tribo (triboelectric charge amount) and a thin layer is formed on the developing sleeve 5. After that, the sheet is conveyed to the developing section, which is a section facing the photosensitive drum 1.
【００５７】この現像部において、現像スリーブ５上に
薄層形成されたトナー層は、電源１８によって現像スリ
ーブ５と感光ドラム１の両者間に印加された直流を重畳
した交流電圧（現像ＡＣバイアス）によって、感光ドラ
ム１上の静電潜像にトナー像として現像される。In this developing section, the toner layer formed as a thin layer on the developing sleeve 5 has an alternating voltage (developing AC bias) in which a direct current applied between the developing sleeve 5 and the photosensitive drum 1 by the power source 18 is superimposed. Is developed as a toner image on the electrostatic latent image on the photosensitive drum 1.
【００５８】現像において消費されなかった未現像トナ
ーは、現像スリーブ５の回転とともに現像スリーブ５の
下部より回収される。この回収部分には可撓性のシート
からなるシール部材１７が設けられ、未現像トナーの現
像容器１４内への通過を許容すると共に、現像容器１４
内のトナー８が現像スリーブ５の下部から漏出するのを
防止する。The undeveloped toner not consumed in the development is collected from the lower part of the developing sleeve 5 as the developing sleeve 5 rotates. A seal member 17 made of a flexible sheet is provided in the collecting portion to allow passage of undeveloped toner into the developing container 14 and also to the developing container 14
The inner toner 8 is prevented from leaking from the lower portion of the developing sleeve 5.
【００５９】この回収された現像スリーブ５上の未現像
トナーは、弾性ローラ６と現像スリーブ５との当接部に
おいて、現像スリーブ５表面から剥ぎ取られる。この剥
ぎ取られたトナーの大部分は、弾性ローラ６の回転に伴
い搬送され現像容器１４内のトナー８と混ざり合い、ト
ナー８の帯電電荷が分散される。同時に弾性ローラ６の
回転により現像スリーブ５上に新たなトナーが供給され
前述の作用を繰り返す。The collected undeveloped toner on the developing sleeve 5 is peeled off from the surface of the developing sleeve 5 at the contact portion between the elastic roller 6 and the developing sleeve 5. Most of the peeled toner is transported as the elastic roller 6 rotates and mixes with the toner 8 in the developing container 14, so that the charge of the toner 8 is dispersed. At the same time, new toner is supplied onto the developing sleeve 5 by the rotation of the elastic roller 6, and the above-described operation is repeated.
【００６０】次に本発明に係る現像スリーブ５の長手方
向両端部のトナーシール構成に関して詳述する。Next, the toner seal structure of the developing sleeve 5 according to the present invention at both longitudinal ends will be described in detail.
【００６１】図２に示した現像装置４を感光ドラム１方
向から見た図を図３に示す。図３においては説明の都合
上現像スリーブ５は省略されている。FIG. 3 is a view of the developing device 4 shown in FIG. 2 viewed from the direction of the photosensitive drum 1. In FIG. 3, the developing sleeve 5 is omitted for convenience of description.
【００６２】図２に示したように現像容器１４開口部に
は、羊毛フェルト、テフロンパイル等の繊維材料やポリ
ウレタンフォーム、スポンジゴム等の発泡体等の材料か
らなる端部シール部材１９が設けられ、現像スリーブ５
の両端部と現像容器１４との間をシールしている。この
端部シール部材１９は本実施例においては羊毛フェルト
表面にテフロンパイルを設けた構成のものを用い、摺動
性の高いテフロンパイル面を現像スリーブ５の両端部周
面に当接させている。また図３に示したように、弾性ブ
レード７の長手方向両端の側面に対して端部シール部材
１９の側面を当接させることにより、弾性ブレード７の
側端部からのトナーの漏れ出しを防止している。As shown in FIG. 2, the opening portion of the developing container 14 is provided with an end seal member 19 made of a fiber material such as wool felt and Teflon pile or a material such as polyurethane foam and foam such as sponge rubber. , Developing sleeve 5
The both ends of the developing container and the developing container 14 are sealed. In this embodiment, the end seal member 19 has a structure in which a Teflon pile is provided on the surface of the wool felt, and the Teflon pile surface having high slidability is brought into contact with the peripheral surfaces of both ends of the developing sleeve 5. . Further, as shown in FIG. 3, the side surfaces of the end seal member 19 are brought into contact with the side surfaces of the elastic blade 7 at both ends in the longitudinal direction to prevent the toner from leaking from the side end portions of the elastic blade 7. are doing.
【００６３】弾性ローラ６はその両端側面部分が現像容
器１４の内壁と間隙を有している。このように間隙を設
けず、弾性ローラ６の両端側面部分を内壁と当接させた
場合は、前述したように弾性ローラ６の両端側面部分と
現像容器１４の内壁間に侵入したトナー８が弾性ローラ
６の回転時に摺擦され凝集塊となるため好ましくない。The elastic roller 6 has a space at both end side surfaces thereof with the inner wall of the developing container 14. When the both end side portions of the elastic roller 6 are brought into contact with the inner wall without providing a gap as described above, the toner 8 that has entered between the both end side portions of the elastic roller 6 and the inner wall of the developing container 14 is elastic as described above. It is not preferable because the rollers 6 rub against each other during rotation to form aggregates.
【００６４】弾性ブレード７は、図３に示したように、
少なくとも弾性ローラ６の未当接部分に対応する現像ス
リーブ周面に当接する領域で、図中斜線部で示した現像
スリーブ５との当接ニップから弾性ブレード７先端まで
の距離ｅが、その内側の現像に寄与する領域における距
離ｄよりも短くなるように構成されている。The elastic blade 7, as shown in FIG.
The distance e from the contact nip with the developing sleeve 5 shown by the shaded portion in the drawing to the tip of the elastic blade 7 is at least inside the area where the elastic roller 6 contacts the peripheral surface of the developing sleeve corresponding to the uncontacted portion. Is shorter than the distance d in the region that contributes to development.
【００６５】つまり、現像スリーブ５上に形成されるト
ナー層厚は、当接ニップの現像スリーブ５回転方向上流
側の点から弾性ブレードの先端までの距離に影響され、
この距離が長いほど現像スリーブ５上に形成されるトナ
ー層が厚く、短くなるとトナー層が薄くなるのは従来か
ら知られており、本実施例においては通常の現像領域に
おけるこの距離ｄに比べ弾性ローラ６の未当接部分に対
応する現像スリーブ周面に当接する領域でこの距離ｅを
短くすることで当該領域のトナーへの規制力を高めてい
る。That is, the thickness of the toner layer formed on the developing sleeve 5 is affected by the distance from the point on the upstream side of the contact nip in the rotation direction of the developing sleeve 5 to the tip of the elastic blade,
It is conventionally known that the longer the distance is, the thicker the toner layer formed on the developing sleeve 5 is, and the shorter the distance is, the thinner the toner layer is. Therefore, in this embodiment, the toner layer is elastic as compared with the distance d in the normal developing area. By shortening this distance e in the region that contacts the peripheral surface of the developing sleeve corresponding to the uncontacted portion of the roller 6, the force of regulating the toner in that region is increased.
【００６６】具体的には当接ニップの現像スリーブ５の
回転方向下流端から弾性ブレード７の先端までの距離ｄ
が通常の現像領域で１．５ｍｍとしたのに対し、この端
部領域では、距離ｅを０．７ｍｍとしている。なお、前
述したように現像スリーブ５の回転方向上流端から弾性
ブレード７の先端までの距離が弾性ブレード７のトナー
の取り込み量に影響するためこの距離で記載すべきであ
るが、本実施例においては端部領域では弾性ブレード７
先端が当接ニップ内にあるため回転方向上流端から弾性
ブレード７の先端までの距離がゼロになる。従って本実
施例においては説明の都合上現像スリーブ５の回転方向
下流端から弾性ブレード７の先端までの距離に関して記
載している。Specifically, the distance d from the downstream end of the contact nip in the rotational direction of the developing sleeve 5 to the tip of the elastic blade 7.
Is 1.5 mm in the normal developing area, whereas the distance e is 0.7 mm in this end area. As described above, since the distance from the upstream end of the developing sleeve 5 in the rotational direction to the tip of the elastic blade 7 affects the amount of toner taken in by the elastic blade 7, this distance should be described. However, in this embodiment. Is the elastic blade 7 in the end region
Since the tip is in the contact nip, the distance from the upstream end in the rotational direction to the tip of the elastic blade 7 becomes zero. Therefore, in this embodiment, for convenience of description, the distance from the downstream end of the developing sleeve 5 in the rotational direction to the tip of the elastic blade 7 is described.
【００６７】この距離ｄは現像スリーブ５上に形成され
るトナー８の層厚を良好に維持するために定めたもので
あり、使用するトナー８、現像スリーブ５によって適宜
適正な長さに設定すれば良く、本実施例において良好な
トナーコート量０．６ｍｇ／ｃｍ2 を得られることから
上記値に定めてある。This distance d is set in order to maintain a good layer thickness of the toner 8 formed on the developing sleeve 5, and may be set to an appropriate length depending on the toner 8 and the developing sleeve 5 used. The above value is set because the toner coat amount of 0.6 mg / cm 2 can be obtained in this embodiment.
【００６８】またこの端部領域における弾性ブレード７
の先端位置は当該位置における現像スリーブ５上のトナ
ー規制力をより高める意味で当接ニップ部内にあるよう
にするのが好ましく、本実施例における当接ニップの幅
が約１．０ｍｍであることから、上述したように距離ｅ
を０．７ｍｍとし、当接ニップ部内となるよう構成し
た。Also, the elastic blade 7 in this end region
The tip position of the contact nip is preferably located within the contact nip portion in order to enhance the toner regulating force on the developing sleeve 5 at that position, and the width of the contact nip in this embodiment is about 1.0 mm. From the distance e as described above
Was set to 0.7 mm so as to be within the contact nip portion.
【００６９】このように弾性ブレード７の先端位置を以
上の構成とすることによって、現像スリーブ５の両端部
の弾性ローラ６の未当接部分に対応する領域における弾
性ブレード７のトナー８への規制力を、その内側の現像
に寄与する領域に比べ高めることができる。By thus configuring the tip position of the elastic blade 7 as described above, the restriction of the elastic blade 7 to the toner 8 in the regions corresponding to the non-contact portions of the elastic roller 6 at both ends of the developing sleeve 5. The force can be increased compared to the area inside which it contributes to development.
【００７０】なお本実施例においては、弾性ブレード７
端部を図３に示したような形状としたが、図４の弾性ブ
レード２０に示したような両端部を斜めにカットしたよ
うな形状にしてもよく、要は弾性ブレード７端部の形状
が、少なくとも弾性ローラ６の未当接部分に対応する現
像スリーブ周面に当接する領域で、現像スリーブ５との
当接ニップから弾性ブレード７先端までの距離がその内
側の領域の距離よりも短くなっていればよく、本発明の
範囲内で種々変更は可能である。In this embodiment, the elastic blade 7
Although the ends are shaped as shown in FIG. 3, the ends may be shaped as shown in the elastic blade 20 of FIG. 4 by obliquely cutting the ends. Is at least in a region in contact with the peripheral surface of the developing sleeve corresponding to the uncontacted portion of the elastic roller 6, and the distance from the contact nip with the developing sleeve 5 to the tip of the elastic blade 7 is shorter than the distance in the inner region. However, various modifications are possible within the scope of the present invention.
【００７１】この結果、従来の問題であった現像スリー
ブの両端部の弾性ローラの未当接部分に対応する領域に
おいてトナー層厚が徐々に増加し、トナー層厚が厚すぎ
るが故にトナーの帯電が不十分になり、現像動作時に現
像スリーブ両端部から感光体１へトナーがカブリとして
転移したり、この部分でトナー飛散やボタ落ちが発生し
たりするのを防止でき、現像スリーブ５上に均一な厚さ
の現像剤層を安定して形成し、感光ドラム１上の静電潜
像を良好に現像することが可能となった。As a result, the toner layer thickness gradually increases in the areas corresponding to the non-contact portions of the elastic roller at both ends of the developing sleeve, which has been a problem in the prior art, and the toner layer thickness is too thick. Is insufficient, and it is possible to prevent the toner from being transferred as fog from both ends of the developing sleeve to the photoconductor 1 during the developing operation, and to prevent the toner scattering and the dripping from occurring in this part, and the toner is evenly distributed on the developing sleeve 5. It became possible to stably form a developer layer of various thicknesses and develop the electrostatic latent image on the photosensitive drum 1 satisfactorily.
【００７２】実施例２ 次に本発明に係る現像装置の実施例２について、図５を
用いて説明する。Second Embodiment Next, a second embodiment of the developing device according to the present invention will be described with reference to FIG.
【００７３】本実施例では、弾性ブレード２２の現像ス
リーブ５に当接する裏面側に加圧部材２３を設けた点に
特徴があり、他の構成要素は実施例１と同様である。The present embodiment is characterized in that the pressing member 23 is provided on the back surface side of the elastic blade 22 which comes into contact with the developing sleeve 5, and the other components are the same as in the first embodiment.
【００７４】この加圧部材２３は弾性ブレード２２をそ
の裏面側から加圧し、弾性ブレード２２の現像スリーブ
５に対する当接圧を高めるために設けられたものであ
る。The pressing member 23 is provided to press the elastic blade 22 from the back side thereof and increase the contact pressure of the elastic blade 22 against the developing sleeve 5.
【００７５】本実施例においては、加圧部材２３として
リン青銅製の金属薄板を用い、一端を現像容器１４に支
持し、他端を弾性ブレード２２両端部の現像スリーブ５
に対する裏面側に当接するように設けている。この弾性
ブレード２２の両端部とは、実施例１と同様に少なくと
も弾性ローラ６の未当接部分に対応する現像スリーブ周
面に当接する領域である。本実施例では弾性ブレード２
２として実施例１と異なり、その両端部に自由長の短い
領域を設けていない従来の図１１に示した弾性ブレード
５１と同一形状のものを用いている。In this embodiment, a thin metal plate made of phosphor bronze is used as the pressing member 23, one end of which is supported by the developing container 14 and the other end of which is the developing sleeve 5 at both ends of the elastic blade 22.
It is provided so as to be in contact with the back side of the. Both ends of the elastic blade 22 are regions that are in contact with at least the peripheral surface of the developing sleeve corresponding to the uncontacted portion of the elastic roller 6, as in the first embodiment. In this embodiment, the elastic blade 2
Different from the first embodiment, the second elastic blade 51 has the same shape as the conventional elastic blade 51 shown in FIG.
【００７６】このように弾性ブレード２２の現像スリー
ブ５に対する当接圧を通常の現像領域に比べ現像スリー
ブ５端部の弾性ローラ６の未当接部分で高めることによ
って、この部分におけるトナーの規制力を高め、トナー
のトリボをあげることが可能となる。As described above, the contact pressure of the elastic blade 22 with respect to the developing sleeve 5 is increased in the non-contact portion of the elastic roller 6 at the end portion of the developing sleeve 5 as compared with the normal developing area. It is possible to increase the toner charge and raise the toner tribo.
【００７７】この結果、現像スリーブ５上へのトナーの
電気的付着力を高めることができ、実施例１と同様の効
果が得られる。As a result, the electric adhesion of the toner on the developing sleeve 5 can be increased, and the same effect as that of the first embodiment can be obtained.
【００７８】なお、本実施例においては加圧部材２３を
設けたが、要は弾性ブレード２２両端部の現像スリーブ
２２の弾性ローラ６の未当接部分での当接圧を高めれば
よく、例えば弾性ブレード２２両端部の厚さを厚くして
もよい。また実施例１で用いた形状の弾性ブレード７と
組合せても効果的である。Although the pressing member 23 is provided in this embodiment, the point is to increase the contact pressure at the non-contact portion of the elastic roller 6 of the developing sleeve 22 at both ends of the elastic blade 22, for example, The thickness of both ends of the elastic blade 22 may be increased. It is also effective to combine with the elastic blade 7 having the shape used in the first embodiment.
【００７９】実施例３ 次に、本発明に係る現像装置の実施例３について、図６
により説明する。図６は、本発明の実施例３における現
像装置を感光体１方向から見た図を示す。同図において
説明の都合上現像スリーブは不図示としている。Third Embodiment Next, a third embodiment of the developing device according to the present invention will be described with reference to FIG.
This will be described below. FIG. 6 is a view of the developing device according to the third embodiment of the present invention as viewed from the direction of the photosensitive member 1. In the figure, the developing sleeve is not shown for convenience of description.
【００８０】本実施例では弾性ブレード２４の現像スリ
ーブ５への当接面の表面粗さを通常の現像領域（ｆ部
分）とその両端部の少なくとも弾性ローラ６の未当接部
分（ｇ部分）で変えているのが特徴であり、他の構成要
素に関しては実施例１と同様である。In this embodiment, the surface roughness of the contact surface of the elastic blade 24 with the developing sleeve 5 is set to the normal developing area (f portion) and at least the non-contact portion (g portion) of the elastic roller 6 at both ends thereof. The other characteristic is the same as that of the first embodiment.
【００８１】弾性ブレード２４の材質としては従来と同
様のゴム材料か或いはＳＵＳ、リン青銅等の金属薄板を
用いるが、本実施例においてはウレタンゴムを用いてい
る。そしてその現像スリーブ当接面側の表面粗さＲｚを
通常の現像領域が５μｍであるのに対し、その両端部の
弾性ローラ６の未当接部分では２μｍ以下の平滑面とな
るように両者の表面粗さを変えるよう加工処理を施して
いる。As the material of the elastic blade 24, a rubber material similar to the conventional one or a thin metal plate such as SUS or phosphor bronze is used. In this embodiment, urethane rubber is used. The surface roughness Rz of the developing sleeve contacting surface side is 5 μm in the normal developing area, whereas the non-contacting portions of the elastic rollers 6 at both ends thereof have a smooth surface of 2 μm or less. It is processed to change the surface roughness.
【００８２】具体的方法としては、ゴム注型用の型にあ
らかじめ所定の粗さになるように粗面化処理及び鏡面仕
上げを施しておくか、或いはシリコンゴムの場合はゴム
成形後にサンドブラスト、バフ仕上げ等をすればよい。As a concrete method, a rubber casting mold is subjected to a surface roughening treatment and a mirror finish so as to have a predetermined roughness in advance, or in the case of silicone rubber, it is sandblasted or buffed after rubber molding. Just finish it.
【００８３】弾性ブレード２４表面の表面粗さは現像ス
リーブ５上のトナー８の規制力に影響しており、この表
面粗さが細かいほど現像スリーブ５上に形成されるトナ
ー層厚が薄くなり、トナーの帯電量が増加する傾向があ
る。The surface roughness of the surface of the elastic blade 24 influences the regulating force of the toner 8 on the developing sleeve 5. The finer the surface roughness, the thinner the toner layer formed on the developing sleeve 5, The charge amount of the toner tends to increase.
【００８４】よって、本実施例では、現像領域に所望の
トナー薄層を得ることのできるような弾性ブレード２４
の表面粗さを適宜設定したのに対し、その両端部分の弾
性ローラ６の未当接部分で更に細かい表面粗さとするこ
とにより、この両端部分におけるトナーへのトリボ付与
能を更に向上させている。Therefore, in the present embodiment, the elastic blade 24 capable of obtaining a desired thin toner layer in the developing area.
The surface roughness is set appropriately, while the non-contact portion of the elastic roller 6 at both end portions thereof has a finer surface roughness to further improve the tribo imparting ability to the toner at the both end portions. .
【００８５】これによって、現像スリーブ５上へのトナ
ーの電気的付着力を両端部分の弾性ローラ６の未当接部
分で高めることができ、実施例１と同様の効果が得られ
る。As a result, the electric adhesion of the toner onto the developing sleeve 5 can be increased at the non-contacted portions of the elastic rollers 6 at both ends, and the same effect as that of the first embodiment can be obtained.
【００８６】実施例４ 次に、本発明に係る現像装置の実施例４について、図７
により説明する。図７は、現像装置を感光体１方向から
見た図を示す。本実施例では現像スリーブ２６の表面粗
さを、通常の現像領域（ｈ部分）とその両端部の少なく
とも弾性ローラ６（図７中点線で位置を示している）の
未当接部分（ｉ部分）において変えているのが特徴であ
り、他の構成要素に関して実施例１と同様である。Fourth Embodiment Next, a fourth embodiment of the developing device according to the present invention will be described with reference to FIG.
This will be described below. FIG. 7 shows a view of the developing device viewed from the direction of the photoconductor 1. In the present embodiment, the surface roughness of the developing sleeve 26 is determined by comparing the normal developing area (portion h) and the non-contact portion (i portion) of at least the elastic roller 6 (shown by the dotted line in FIG. 7) at both ends thereof. ) Is changed, and other components are the same as those in the first embodiment.
【００８７】本実施例の現像スリーブ２６はアルミニウ
ム製スリーブであり、まず表面全体が表面粗さＲｚ１μ
ｍ以下になるように研磨仕上げし、その後図７中ｈ部分
のみを実施例１と同様に表面にガラスビーズ（＃６０
０）による定形ブラスト処理を施し、表面粗さＲｚが約
３μｍとしたものである。これにより、弾性ローラ６の
未当接部分である図７中ｉ部分は表面粗さＲｚが１μｍ
以下の平滑面となる。The developing sleeve 26 of this embodiment is an aluminum sleeve, and the entire surface has a surface roughness Rz of 1 μm.
Polishing is performed so as to be m or less, and then only the h portion in FIG.
The surface roughness Rz is about 3 μm after the regular blast treatment according to 0). As a result, the surface roughness Rz of the portion i in FIG. 7, which is the non-contact portion of the elastic roller 6, is 1 μm.
It becomes the following smooth surface.
【００８８】現像スリーブ２６の表面粗さは周知のよう
にトナー８の搬送力に影響しており、この表面粗さが細
かいほど、弾性ブレード２５の当接ニップから抜け出
し、現像スリーブ２６上に形成されるトナー層厚が薄く
なり、トナーの帯電量が増加する傾向がある。As is well known, the surface roughness of the developing sleeve 26 affects the conveying force of the toner 8. As the surface roughness is smaller, the developing sleeve 26 comes out of the contact nip of the elastic blade 25 and is formed on the developing sleeve 26. The thickness of the toner layer formed becomes smaller, and the amount of charge on the toner tends to increase.
【００８９】よって、本実施例では、現像領域に所望の
トナー薄層を得ることのできるような適度な搬送力とな
るような表面粗さを設定したのに対し、その両端部分の
弾性ローラの未当接部分で更に細かい表面粗さとするこ
とにより、この両端部分におけるトナー８の搬送力を低
下させている。Therefore, in this embodiment, the surface roughness is set so as to obtain an appropriate transporting force so that a desired toner thin layer can be obtained in the developing area. The finer surface roughness is provided at the non-contact portion to reduce the conveying force of the toner 8 at the both end portions.
【００９０】これによって、従来の現像スリーブの両端
部の弾性ローラの未当接部分に対応する領域においてト
ナー層厚が徐々に増加する現象を防止し、実施例１と同
様の効果が得られる。As a result, it is possible to prevent the phenomenon that the toner layer thickness gradually increases in the areas corresponding to the non-contact portions of the elastic roller at both ends of the conventional developing sleeve, and the same effect as that of the first embodiment can be obtained.
【００９１】また本実施例においては、現像スリーブ２
６として通常の現像領域での表面粗さに対して、少なく
とも現像スリーブ２６両端部の弾性ローラ６の未当接部
における表面粗さを細かくしたが、現像スリーブ２６と
して金属素管表面にコート剤をコーティングしたものを
用いてもよい。Further, in the present embodiment, the developing sleeve 2
As compared with the surface roughness in the normal developing region, the surface roughness in at least the non-contact portion of the elastic roller 6 at both ends of the developing sleeve 26 is made finer as 6. You may use what coated.
【００９２】例えば通常の現像領域にはフェノール等の
樹脂材料にカーボン、グラファイト等の導電粉を分散し
たコート剤をコーティングし、その両端部の弾性ローラ
の未当接部分では、使用するトナーと摩擦帯電列の相違
する樹脂材料、具体的にはアクリル系樹脂を用い、積極
的にトナーへのトリボ付与を行なうのも有効である。For example, a resin material such as phenol is coated with a coating agent in which conductive powder such as carbon or graphite is dispersed in a normal developing area, and the non-contact portions of the elastic rollers at both ends thereof are rubbed with the toner to be used. It is also effective to positively apply tribo to the toner by using a resin material having a different charge sequence, specifically, an acrylic resin.
【００９３】要は現像スリーブの現像領域でのトナーへ
のトリボ付与能に対して、弾性ローラの未当接部分で
は、更にトリボ付与能を向上させたコート剤を用いれば
よく、トナーを正極性に帯電しやすくするには、フッ素
樹脂、塩化ビニール樹脂、ポリオレフィン樹脂、クロル
スチレン樹脂等の電子吸引性の強い樹脂、トナーを負極
性に帯電しやすくするには、ポリアミド樹脂、メラミン
樹脂、ポリウレタン樹脂、アクリル樹脂等の電子供与性
の強い樹脂があり、これらの樹脂を適宜選択し、現像領
域とその両端部で使い分ければよい。The point is that, in contrast to the ability to impart tribo to the toner in the developing area of the developing sleeve, a coating agent having a further improved ability to impart tribo may be used in the non-contact portion of the elastic roller. In order to make it easier to electrostatically charge, fluororesin, vinyl chloride resin, polyolefin resin, chlorostyrene resin, etc., which has a strong electron-withdrawing property, and in order to make the toner negatively charged, polyamide resin, melamine resin, polyurethane resin There are resins having a strong electron donating property such as acrylic resin, and these resins may be appropriately selected and used properly in the developing area and both ends thereof.
【００９４】さらに上記の導電粉の分散比率を、現像領
域に対してその両端部で変えることによってトナーへの
トリボ付与能を上げることも可能である。例えば現像領
域において、フェノール樹脂にカーボン、グラファイト
の導電粉を１００重量部添加したのに対し、その両端部
では導電粉を５０重量部にするなど比率を下げればよ
い。Further, it is possible to improve the ability to impart tribo to the toner by changing the dispersion ratio of the above-mentioned conductive powder at both ends of the development area. For example, in the developing area, 100 parts by weight of the conductive powder of carbon or graphite is added to the phenol resin, whereas the ratio of the conductive powder is 50 parts by weight at the both ends thereof.
【００９５】実施例５ 次に、現像装置の実施例５について、図８により説明す
る。本実施例では、現像スリーブ５の両端部の少なくと
も弾性ローラ６の未当接部においてトナー掻き落とし部
材２８を設けた点に特徴があり、他の構成要素は実施例
１と同様である。Fifth Embodiment Next, a fifth embodiment of the developing device will be described with reference to FIG. The present embodiment is characterized in that the toner scraping member 28 is provided at least on both ends of the developing sleeve 5 at the non-contact portion of the elastic roller 6, and the other components are the same as those of the first embodiment.
【００９６】図８において、トナー掻き落とし部材２８
は板状のゴム材料、或いは金属薄板を用い、一端を不図
示の現像容器１４の一部により支持し、他端のエッジ部
分を、弾性ブレード２５当接部の現像スリーブ５回転方
向上流側近傍に当接するように設けている。In FIG. 8, the toner scraping member 28
Is a plate-shaped rubber material or a thin metal plate, one end of which is supported by a part of the developing container 14 (not shown), and the other end has an edge portion in the vicinity of the elastic blade 25 contact portion upstream side in the rotation direction of the developing sleeve 5. It is provided so as to abut.
【００９７】このトナー掻き落とし部材２８の現像スリ
ーブ５への当接領域は、少なくとも弾性ローラ６の未当
接部全域であり、その側端部は端部シール部材１９に当
接している。The contact area of the toner scraping member 28 with the developing sleeve 5 is at least the entire uncontacted portion of the elastic roller 6, and the side end portion thereof is in contact with the end seal member 19.
【００９８】この構成により、現像スリーブ５の両端部
の弾性ローラの未当接部分に対応する領域において常時
トナー８を掻き落とすことが可能となり、従来のこの部
分で生じていたトナー層厚が徐々に増加する現象を防止
し、実施例１と同様の効果が得られる。With this configuration, the toner 8 can be constantly scraped off in the areas corresponding to the non-contact portions of the elastic roller on both ends of the developing sleeve 5, and the toner layer thickness that has conventionally occurred in this portion is gradually increased. The phenomenon similar to that in the first embodiment can be obtained by preventing the phenomenon that the number increases.
【００９９】なお、実施例１〜５に関して、適宜組合せ
ることにより、更に効果を高めることは可能であり、ま
た使用した各部材に関しても本発明の範囲内で適宜選択
が可能である。It is to be noted that the effects can be further enhanced by appropriately combining Examples 1 to 5 and the members used can be appropriately selected within the scope of the present invention.
【０１００】さらに実施例１〜５においては画像形成装
置本体に着脱可能な現像装置からなるプロセスカートリ
ッジとして用いたが、画像形成装置本体内に固定され、
トナーのみを補給するような構成の現像装置として用い
てもよく、また現像装置と感光ドラムクリーニングブレ
ード、廃トナー収容容器、帯電装置を一体で形成し画像
形成装置本体に対し着脱可能なプロセスカートリッジと
して用いてもよい。Further, in Embodiments 1 to 5, the process cartridge is composed of a developing device which can be attached to and detached from the main body of the image forming apparatus, but is fixed in the main body of the image forming apparatus.
It may be used as a developing device configured to replenish only toner, or as a process cartridge that is integrally formed with the developing device, a photosensitive drum cleaning blade, a waste toner container, and a charging device, and is attachable to and detachable from the image forming apparatus main body. You may use.
【０１０１】[0101]
【発明の効果】以上の説明から明らかなように、本発明
によれば、現像剤担持体の長手方向両端部、特に弾性ロ
ーラ未当接部分において、現像時に、像担持体へのトナ
ーのカブリ、トナーの飛散、及びボタ落ちの発生を防止
できるとともに、弾性規制ブレードによる現像剤担持体
上のトナー薄層を良好に形成し、高品質画像を得ること
ができ、またトナーによる汚染を防止できる現像装置、
プロセスカートリッジ及び画像形成装置を提供すること
ができる。As is apparent from the above description, according to the present invention, toner fogging on the image bearing member at the time of development is performed at both longitudinal end portions of the developer bearing member, particularly at the portions not contacting the elastic roller. In addition, it is possible to prevent toner from scattering and dripping, and to form a thin toner layer on the developer carrying member by the elastic regulation blade in good condition to obtain a high-quality image and prevent toner contamination. Developing device,
A process cartridge and an image forming apparatus can be provided.
【図１】本発明に係る実施例１の現像装置を用いた画像
形成装置の概略構成図である。FIG. 1 is a schematic configuration diagram of an image forming apparatus using a developing device according to a first exemplary embodiment of the present invention.
【図２】図１の現像装置を示す構成図である。FIG. 2 is a configuration diagram showing the developing device of FIG.
【図３】図２の現像装置を感光体方向から見た説明図で
ある。FIG. 3 is an explanatory view of the developing device of FIG. 2 viewed from the direction of the photoconductor.
【図４】実施例１の現像装置の変形例を示す説明図であ
る。FIG. 4 is an explanatory diagram illustrating a modified example of the developing device according to the first exemplary embodiment.
【図５】実施例２の現像装置を示す構成図である。FIG. 5 is a configuration diagram illustrating a developing device according to a second exemplary embodiment.
【図６】実施例３の現像装置を感光体方向から見た説明
図である。FIG. 6 is an explanatory diagram of a developing device according to a third exemplary embodiment as viewed from a photoconductor direction.
【図７】実施例４の現像装置を感光体方向から説明図で
ある。FIG. 7 is an explanatory diagram of the developing device according to the fourth embodiment as viewed from the photoconductor direction.
【図８】実施例５の現像装置を示す構成図である。FIG. 8 is a configuration diagram illustrating a developing device according to a fifth exemplary embodiment.
【図９】従来の非磁性一成分現像装置の一例を示す構成
図である。FIG. 9 is a configuration diagram showing an example of a conventional non-magnetic one-component developing device.
【図１０】図９の現像装置を感光体方向から見た説明図
である。FIG. 10 is an explanatory diagram of the developing device in FIG. 9 as viewed from the photoconductor direction.
【図１１】従来の現像装置の他の例を示す概略構成図で
ある。FIG. 11 is a schematic configuration diagram illustrating another example of a conventional developing device.
１ 感光ドラム（潜像担持体） ５ 現像スリーブ（現像剤担持体） ６ 弾性ローラ ７ 弾性規制ブレード １４ 現像容器 １９ 端部シール部材 ２３ 加圧部材 ２８ 掻き落とし部材 DESCRIPTION OF SYMBOLS 1 Photosensitive drum (latent image carrier) 5 Development sleeve (Developer carrier) 6 Elastic roller 7 Elasticity regulation blade 14 Development container 19 End seal member 23 Pressing member 28 Scraping member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渋谷 卓史 東京都大田区下丸子３丁目30番２号 キヤ ノン株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takushi Shibuya 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.
Claims (10)
と、該現像容器の開口部に延在し回動する現像剤担持体
と、該現像剤担持体に対し現像剤を介して所定の面が当
接した弾性規制ブレードと、該弾性規制ブレードの前記
現像剤担持体との当接部に対し、前記現像剤担持体の回
転方向上流側に当接して設けられた回転可能な弾性ロー
ラと、前記現像剤担持体の長手方向両端部と前記現像容
器の開口部との間隙に設けられた端部シール部材とを有
する現像装置において、 前記現像容器開口部の両端部内壁と前記弾性ローラの長
手方向側端部とは間隙を有し、前記弾性規制ブレードの
前記現像剤担持体との当接ニップは、前記弾性ローラの
前記現像剤担持体との当接ニップよりも前記現像剤担持
体長手方向の外側に亙り形成され、少なくとも前記現像
剤担持体の前記弾性ローラの未当接部の周面上における
前記弾性規制ブレードの前記現像剤担持体との当接部に
て、前記弾性規制ブレードの当接ニップから前記現像剤
担持体回転方向上流側の先端までの距離が他の部分に比
べ短くなるように構成したことを特徴とする現像装置。1. A developer container containing a non-magnetic one-component developer, a developer carrier extending into an opening of the developer container and rotating, and a predetermined developer carrier for the developer carrier. Of the elastic regulation blade with which the surface of the elastic regulation blade abuts, and the contact portion of the elastic regulation blade with the developer carrying body, the rotatable elasticity provided in contact with the upstream side in the rotation direction of the developer carrying body. In a developing device having a roller and an end seal member provided in a gap between both longitudinal ends of the developer carrier and the opening of the developing container, an inner wall of both ends of the developing container opening and the elastic member are provided. There is a gap between the roller and the longitudinal end portion thereof, and the contact nip of the elastic restriction blade with the developer carrying member is the developer more than the contact nip of the elastic roller with the developer carrying member. It is formed over the outside in the longitudinal direction of the carrier, and at least the front At the contact portion of the elastic regulation blade with the developer bearing body on the peripheral surface of the non-contact portion of the elastic roller of the developer bearing body, from the contact nip of the elasticity regulating blade to the developer bearing body. A developing device characterized in that the distance to the tip on the upstream side in the rotational direction is configured to be shorter than that of other portions.
と、該現像容器の開口部に延在し回動する現像剤担持体
と、該現像剤担持体に対し現像剤を介して当接した弾性
規制ブレードと、該弾性規制ブレードの前記現像剤担持
体との当接部に対し前記現像剤担持体の回転方向上流側
に当接して設けられた回転可能な弾性ローラと、前記現
像剤担持体の長手方向両端部と前記現像容器の開口部と
の間隙に設けられた端部シール部材とを有する現像装置
において、 前記現像容器開口部の両端部内壁と前記弾性ローラの長
手方向側端部とは間隙を有し、前記弾性規制ブレードの
前記現像剤担持体との当接ニップは、前記弾性ローラの
前記現像剤担持体との当接ニップよりも前記現像剤担持
体長手方向の外側に亙り形成され、少なくとも前記現像
剤担持体の前記弾性ローラの未当接部の周面上における
前記弾性規制ブレードの前記現像剤担持体との当接部に
て、前記弾性規制ブレードの前記現像剤担持体への当接
圧が他の部分に比べ高くなるように構成したことを特徴
とする現像装置。2. A developing container for accommodating a non-magnetic one-component developer, a developer carrying member that extends into an opening of the developing container and rotates, and a developer carrying member that contacts the developer carrying member via a developer. An elastic regulating blade in contact with the elastic regulating blade; a rotatable elastic roller provided in contact with an abutting portion of the elastic regulating blade with the developer carrying member on the upstream side in the rotation direction of the developer carrying member; In a developing device having an end seal member provided in a gap between the longitudinal ends of the agent carrier and the opening of the developing container, an inner wall of both ends of the developing container opening and a longitudinal side of the elastic roller. There is a gap from the end portion, and the contact nip of the elastic regulation blade with the developer carrier is more in the longitudinal direction of the developer carrier than the contact nip of the elastic roller with the developer carrier. It is formed on the outside and carries at least the developer. At the contact portion of the elasticity regulating blade with the developer carrying body on the peripheral surface of the non-contact portion of the elastic roller, the contact pressure of the elasticity regulating blade with respect to the developer carrying body is A developing device, which is configured to be higher than the portion.
部の周面上における前記弾性規制ブレードの前記現像剤
担持体との当接部において、前記弾性規制ブレードに加
圧部材を設けたことを特徴とする請求項２の現像装置。3. A pressing member is provided on the elastic regulation blade at the contact portion of the elastic regulation blade with the developer bearing body on the peripheral surface of the non-contact portion of the elastic roller of the developer bearing body. The developing device according to claim 2, wherein
と、該現像容器の開口部に延在し回動する現像剤担持体
と、該現像剤担持体に対し現像剤を介して当接した弾性
規制ブレードと、該弾性規制ブレードの前記現像剤担持
体との当接部に対し前記現像剤担持体の回転方向上流側
に当接して設けられた回転可能な弾性ローラと、前記現
像剤担持体の長手方向両端部と前記現像容器の開口部と
の間隙に設けられた端部シール部材とを有する現像装置
において、 前記現像容器開口の両端部内壁と前記弾性ローラの長手
方向側端部とは間隙を有し、前記弾性規制ブレードの前
記現像剤担持体との当接ニップは、前記弾性ローラの前
記現像剤担持体との当接ニップよりも前記現像剤担持体
長手方向の外側に亙り形成され、少なくとも前記現像剤
担持体の前記弾性ローラの未当接部の周面上における前
記弾性規制ブレードの前記現像剤担持体との当接部に
て、前記弾性規制ブレードの前記現像剤担持体との当接
部での表面粗さが他の部分に比べ小さくなるように構成
したことを特徴とする現像装置。4. A developing container for accommodating a non-magnetic one-component developer, a developer carrying member which extends into an opening of the developing container and rotates, and a developer carrying member which contacts the developer carrying member via a developer. An elastic regulating blade in contact with the elastic regulating blade; a rotatable elastic roller provided in contact with an abutting portion of the elastic regulating blade with the developer carrying member on the upstream side in the rotation direction of the developer carrying member; In a developing device having end seal members provided in a gap between the longitudinal ends of the agent carrier and the opening of the developing container, inner walls of both ends of the developing container opening and longitudinal ends of the elastic roller. And a contact nip between the elastic regulation blade and the developer carrier is located outside the contact nip between the elastic roller and the developer carrier in the longitudinal direction of the developer carrier. Formed over at least the developer carrying member At the contact portion of the elasticity regulating blade with the developer carrying body on the peripheral surface of the non-contact portion of the elastic roller, the surface roughness at the contact portion of the elasticity regulating blade with the developer carrying body. The developing device is characterized in that the size is smaller than that of other portions.
と、該現像容器の開口部に延在し回動する現像剤担持体
と、該現像剤担持体に対し現像剤を介して当接した弾性
規制ブレードと、該弾性規制ブレードの前記現像剤担持
体との当接部に対し前記現像剤担持体の回転方向上流側
に当接して設けられた回転可能な弾性ローラと、前記現
像剤担持体の長手方向両端部と前記現像容器の開口部と
の間隙に設けられた端部シール部材とを有する現像装置
において、 前記現像容器開口部の両端部内壁と前記弾性ローラの長
手方向側端部とは間隙を有し、前記弾性規制ブレードの
前記現像剤担持体との当接ニップは、前記弾性ローラの
前記現像剤担持体との当接ニップよりも前記現像剤担持
体長手方向の外側に亙り形成され、少なくとも前記現像
剤担持体の前記弾性ローラの当接部の外側の未当接部と
前記端部シール部材当接部の内側に挟まれた領域の周面
上における表面粗さを、他の部分に比べ小さくなるよう
に構成したことを特徴とする現像装置。5. A developing container for accommodating a non-magnetic one-component developer, a developer carrying member which extends into an opening of the developing container and rotates, and a developer carrying member which contacts the developer carrying member via a developer. An elastic regulating blade in contact with the elastic regulating blade; a rotatable elastic roller provided in contact with an abutting portion of the elastic regulating blade with the developer carrying member on the upstream side in the rotation direction of the developer carrying member; In a developing device having an end seal member provided in a gap between the longitudinal ends of the agent carrier and the opening of the developing container, an inner wall of both ends of the developing container opening and a longitudinal side of the elastic roller. There is a gap from the end portion, and the contact nip of the elastic regulation blade with the developer carrier is more in the longitudinal direction of the developer carrier than the contact nip of the elastic roller with the developer carrier. It is formed on the outside and carries at least the developer. So that the surface roughness on the peripheral surface of the region sandwiched between the non-contact part outside the contact part of the elastic roller and the inside of the end seal member contact part is smaller than that of the other part. A developing device characterized by being configured.
と、該現像容器の開口部に延在し回動する現像剤担持体
と、該現像剤担持体に対し現像剤を介して当接した弾性
規制ブレードと、該弾性規制ブレードの前記現像剤担持
体との当接部に対し前記現像剤担持体の回転方向上流側
に当接して設けられた回転可能な弾性ローラと、前記現
像剤担持体の長手方向両端部と前記現像容器の開口部と
の間隙に設けられた端部シール部材とを有する現像装置
において、 前記現像容器開口部の両端部内壁と前記弾性ローラの長
手方向側端部とは間隙を有し、前記弾性規制ブレードの
前記現像剤担持体との当接ニップは、前記弾性ローラの
前記現像剤担持体との当接ニップよりも前記現像剤担持
体長手方向の外側に亙り形成され、少なくとも前記現像
剤担持体の前記弾性ローラの当接部の外側の未当接部と
前記端部シール当接部の内側に挟まれた領域の周面上に
おける帯電能を、他の部分に比べ大きくなるようにした
ことを特徴とする現像装置。6. A developing container for accommodating a non-magnetic one-component developer, a developer carrying member that extends into an opening of the developing container and rotates, and a developer carrying member that contacts the developer carrying member via a developer. An elastic regulating blade in contact with the elastic regulating blade; a rotatable elastic roller provided in contact with an abutting portion of the elastic regulating blade with the developer carrying member on the upstream side in the rotation direction of the developer carrying member; In a developing device having an end seal member provided in a gap between the longitudinal ends of the agent carrier and the opening of the developing container, an inner wall of both ends of the developing container opening and a longitudinal side of the elastic roller. There is a gap from the end portion, and the contact nip of the elastic regulation blade with the developer carrier is more in the longitudinal direction of the developer carrier than the contact nip of the elastic roller with the developer carrier. It is formed on the outside and carries at least the developer. The charging ability on the peripheral surface of the region sandwiched between the non-contact part outside the contact part of the elastic roller and the inside of the end seal contact part is larger than that of other parts. Developing device.
と、該現像容器の開口部に延在し回動する現像剤担持体
と、該現像剤担持体に対し現像剤を介して当接した弾性
規制ブレードと、該弾性規制ブレードの前記現像剤担持
体との当接部に対し前記現像剤担持体の回転方向上流側
に当接して設けられた回転可能な弾性ローラと、前記現
像剤担持体の長手方向両端部と前記現像容器の開口部と
の間隙に設けられた端部シール部材とを有する現像装置
において、 前記現像容器開口の両端部内壁と前記弾性ローラの長手
方向側端部とは間隙を有し、前記弾性規制ブレードの前
記現像剤担持体との当接ニップは、前記弾性ローラの前
記現像剤担持体との当接ニップよりも前記現像剤担持体
長手方向の外側に亙り形成され、少なくとも前記現像剤
担持体の前記弾性ローラの当接部の外側の未当接部と前
記端部シール部材当接部の内側に挟まれた領域の周面上
に当接するようにトナー掻き落とし部材を別途設けたこ
とを特徴とする現像装置。7. A developer container containing a non-magnetic one-component developer, a developer carrier extending into an opening of the developer container and rotating, and a developer carrier that is applied to the developer carrier via the developer. An elastic regulating blade in contact with the elastic regulating blade; a rotatable elastic roller provided in contact with an abutting portion of the elastic regulating blade with the developer carrying member on the upstream side in the rotation direction of the developer carrying member; In a developing device having end seal members provided in a gap between the longitudinal ends of the agent carrier and the opening of the developing container, inner walls of both ends of the developing container opening and longitudinal ends of the elastic roller. And a contact nip between the elastic regulation blade and the developer carrier is located outside the contact nip between the elastic roller and the developer carrier in the longitudinal direction of the developer carrier. Formed over at least the developer carrying member A toner scraping member is separately provided so as to come into contact with a non-contact portion outside the contact portion of the elastic roller and a peripheral surface of a region sandwiched between the end seal member contact portions. And developing device.
−１が１００〜１８０であり、形状係数ＳＦ−２が１０
０〜１４０であることを特徴とする請求項１から７のう
ち少なくともひとつの現像装置。8. The shape factor SF of the non-magnetic one-component developer
-1 is 100 to 180, and the shape factor SF-2 is 10.
The developing device according to claim 1, wherein the developing device has a size of 0 to 140.
装置と、帯電装置と、像担持体クリーニングブレード
と、廃トナー容器とを一体的に備え、画像形成装置に着
脱自在としたことを特徴とするプロセスカートリッジ。9. A developing device according to any one of claims 1 to 8, a charging device, an image carrier cleaning blade, and a waste toner container are integrally provided, and are detachably attached to the image forming apparatus. And process cartridge.
像装置を固定的にもしくは着脱自在に具備したことを特
徴とする画像形成装置。10. An image forming apparatus comprising the developing device according to claim 1 fixedly or detachably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17054496A JPH09329960A (en) | 1996-06-10 | 1996-06-10 | Developing device, processing cartridge and image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17054496A JPH09329960A (en) | 1996-06-10 | 1996-06-10 | Developing device, processing cartridge and image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09329960A true JPH09329960A (en) | 1997-12-22 |
Family
ID=15906865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17054496A Pending JPH09329960A (en) | 1996-06-10 | 1996-06-10 | Developing device, processing cartridge and image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09329960A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101595A (en) * | 2005-09-30 | 2007-04-19 | Brother Ind Ltd | Developing device, process cartridge and image forming apparatus |
| JP2012118189A (en) * | 2010-11-30 | 2012-06-21 | Brother Ind Ltd | Developing apparatus |
| US8892011B2 (en) | 2011-07-29 | 2014-11-18 | Brother Kogyo Kabushiki Kaisha | Developing apparatus having thickness regulating member |
| JP2017223939A (en) * | 2016-06-14 | 2017-12-21 | キヤノン株式会社 | Developing device and image forming apparatus |
| EP4109180A1 (en) * | 2021-06-25 | 2022-12-28 | Canon Kabushiki Kaisha | Restricting member, developing device, process cartridge, and image forming apparatus |
-
1996
- 1996-06-10 JP JP17054496A patent/JPH09329960A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101595A (en) * | 2005-09-30 | 2007-04-19 | Brother Ind Ltd | Developing device, process cartridge and image forming apparatus |
| JP2012118189A (en) * | 2010-11-30 | 2012-06-21 | Brother Ind Ltd | Developing apparatus |
| US8892011B2 (en) | 2011-07-29 | 2014-11-18 | Brother Kogyo Kabushiki Kaisha | Developing apparatus having thickness regulating member |
| US9298129B2 (en) | 2011-07-29 | 2016-03-29 | Brother Kogyo Kabushiki Kaisha | Developing apparatus having thickness regulating member, sealing member, and restricting member |
| JP2017223939A (en) * | 2016-06-14 | 2017-12-21 | キヤノン株式会社 | Developing device and image forming apparatus |
| EP4109180A1 (en) * | 2021-06-25 | 2022-12-28 | Canon Kabushiki Kaisha | Restricting member, developing device, process cartridge, and image forming apparatus |
| US11860565B2 (en) | 2021-06-25 | 2024-01-02 | Canon Kabushiki Kaisha | Restricting member, developing device, process cartridge, and image forming apparatus |
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