JPH052322A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH052322A JPH052322A JP3178917A JP17891791A JPH052322A JP H052322 A JPH052322 A JP H052322A JP 3178917 A JP3178917 A JP 3178917A JP 17891791 A JP17891791 A JP 17891791A JP H052322 A JPH052322 A JP H052322A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- seal member
- developing device
- developing sleeve
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、電子写真複写機、レー
ザプリンタなどの画像形成装置に用いられる現像装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device used in an image forming apparatus such as an electrophotographic copying machine and a laser printer.
【0002】[0002]
【従来の技術】従来、電子写真複写機などの画像形成装
置に用いられる現像装置は、図9および図10に示すよ
うに、一成分現像剤(以下、「トナー」という。)1を
収容する現像剤容器2を備える。現像剤容器2には開口
部2aが設けられている。2. Description of the Related Art Conventionally, a developing device used in an image forming apparatus such as an electrophotographic copying machine contains a one-component developer (hereinafter referred to as "toner") 1 as shown in FIGS. A developer container 2 is provided. The developer container 2 has an opening 2a.
【0003】現像剤容器2には、トナー1を担持しなが
ら搬送する現像スリーブ3が回転可能に組み込まれてい
る。現像スリーブ3は、その外周面の一部が開口部2a
から外部へ突出するように現像剤容器2に配置されてい
る。A developing sleeve 3 for carrying the toner 1 while carrying it is rotatably incorporated in the developer container 2. A part of the outer peripheral surface of the developing sleeve 3 has an opening 2a.
It is arranged in the developer container 2 so as to project to the outside.
【0004】現像剤容器2には、現像スリーブ3に担持
されているトナー1を所定の層厚に規制しかつ摩擦帯電
させるブレード4が取り付けられている。ブレード4は
現像スリーブ3の長手方向に沿って延びる帯状の弾性部
材からなる。ブレード4はその一方の縁部が現像スリー
ブ3の外周面に接触するように現像スリーブ3の上方に
配置されている。ブレード4は現像スリーブ3の回転方
向と逆の方向に向けて弾性変形されている。A blade 4 is attached to the developer container 2 to regulate the toner 1 carried on the developing sleeve 3 to a predetermined layer thickness and to frictionally charge the toner 1. The blade 4 is made of a strip-shaped elastic member extending along the longitudinal direction of the developing sleeve 3. The blade 4 is arranged above the developing sleeve 3 so that one edge thereof contacts the outer peripheral surface of the developing sleeve 3. The blade 4 is elastically deformed in the direction opposite to the rotation direction of the developing sleeve 3.
【0005】現像剤容器2にはスクイシート5が取り付
けられ、スクイシート5は現像スリーブ3の外周面と現
像剤容器2との間に形成されている隙間から外部へトナ
ー1が漏れることを防止する。スクイシート5は現像ス
リーブ3の長手方向に沿って延びる帯状の弾性部材から
なる。スクイシート5はその一方の縁部が現像スリーブ
3の外周面に接触するように現像スリーブ3の下方に配
置されている。スクイシート5は現像スリーブ3の回転
方向に向けて弾性変形されている。A squishy sheet 5 is attached to the developer container 2, and the squishy sheet 5 prevents the toner 1 from leaking to the outside through a gap formed between the outer peripheral surface of the developing sleeve 3 and the developer container 2. The squi sheet 5 is made of a strip-shaped elastic member extending along the longitudinal direction of the developing sleeve 3. The squi sheet 5 is arranged below the developing sleeve 3 so that one edge thereof contacts the outer peripheral surface of the developing sleeve 3. The squi sheet 5 is elastically deformed in the rotation direction of the developing sleeve 3.
【0006】現像剤容器2には、二つのシール部材6が
取り付けられている。各シール部材6は現像スリーブ3
の円周方向に沿って延びる円弧状のフェルト材からな
る。一方のシール部材6は現像スリーブ3の一方の端部
と現像剤容器3との間に形成されている隙間を覆い、そ
の内周面と現像スリーブ3の端部の外周面とは互いに所
定の圧力で押し付けられている。また、一方のシール部
材6の端部は、現像スリーブ3の一方の端部側に位置す
るブレード4の一方の縁部にその上方から重ね合わされ
ている。Two seal members 6 are attached to the developer container 2. Each seal member 6 is a developing sleeve 3
It is made of an arc-shaped felt material extending along the circumferential direction. The one seal member 6 covers a gap formed between one end of the developing sleeve 3 and the developer container 3, and an inner peripheral surface of the seal member 6 and an outer peripheral surface of the end of the developing sleeve 3 are mutually predetermined. It is pressed by pressure. Further, the end portion of the one seal member 6 is superposed on the one edge portion of the blade 4 located on the one end side of the developing sleeve 3 from above.
【0007】他方のシール部材6は、一方のシール部材
6と同様に、現像スリーブ3の他方の端部と現像剤容器
3との間に形成されている隙間を覆い、その内周面は現
像スリーブ3の他方の端部の外周面に所定の圧力で押し
付けられている。また、他方のシール部材6の端部は、
現像スリーブ3の他方の端部側に位置するブレード4の
他方の縁部にその上方から重ね合わされている。Similar to the one seal member 6, the other seal member 6 covers the gap formed between the other end of the developing sleeve 3 and the developer container 3, and the inner peripheral surface thereof is used for developing. It is pressed against the outer peripheral surface of the other end of the sleeve 3 with a predetermined pressure. The other end of the seal member 6 is
It is superposed on the other edge of the blade 4 located on the other end side of the developing sleeve 3 from above.
【0008】[0008]
【発明が解決しようとする課題】しかし、従来の現像装
置では、各シール部材6の一方の端部が対応するブレー
ド4の端部に部分的に重ね合わされていることにより、
各シール部材6は段状に変形されることによってブレー
ド4に対向する部分と現像スリーブ3に対向する部分と
になるから、該現像スリーブ3に対向する部分とブレー
ド4の端部との間には隙間が形成され、該隙間から外部
へトナー1が漏れ出すことがある。However, in the conventional developing device, one end of each seal member 6 is partially overlapped with the corresponding end of the blade 4, so that
Each seal member 6 becomes a portion facing the blade 4 and a portion facing the developing sleeve 3 by being deformed stepwise, so that between the portion facing the developing sleeve 3 and the end portion of the blade 4. May form a gap, and the toner 1 may leak from the gap to the outside.
【0009】上記隙間をなくすために、各シール部材6
の現像スリーブ3に対する押圧力を高くすることによっ
てブレード4とシール部材6との密着度を高くすること
が考えられるが、ブレード4と現像スリーブ3との接触
圧力が高くなるから、トナー1の融着が発生し、そのト
ナー1の融着発生部分からトナー1の漏れが起こり易く
なる。その結果、シール部材6とブレード4との間の隙
間からのトナー1の漏れを確実に防止することは困難で
ある。In order to eliminate the above-mentioned gap, each seal member 6
It is possible to increase the degree of adhesion between the blade 4 and the seal member 6 by increasing the pressing force of the developing sleeve 3 against the developing sleeve 3. However, since the contact pressure between the blade 4 and the developing sleeve 3 increases, the melting of the toner 1 Adhesion occurs, and the toner 1 easily leaks from the portion where the toner 1 is fused. As a result, it is difficult to reliably prevent the toner 1 from leaking through the gap between the seal member 6 and the blade 4.
【0010】本発明の目的は、現像剤担持体上の現像剤
の層厚を規制するための規制部材と現像剤担持体の端部
から外部への現像剤の漏れを防止するためのシール部材
との間の隙間から現像剤が漏れることを確実に防止する
ことができる現像装置を提供することにある。An object of the present invention is to provide a regulating member for regulating the layer thickness of the developer on the developer carrier and a seal member for preventing the developer from leaking from the end of the developer carrier to the outside. It is an object of the present invention to provide a developing device capable of reliably preventing the developer from leaking through the gap between the developing device and the developing device.
【0011】[0011]
【課題を解決するための手段】本発明によれば、上記目
的は、現像剤を収容する現像剤容器と、該現像剤容器内
の現像剤を担持しながら搬送する現像剤担持体と、該現
像剤担持体に接触することによって該現像剤担持体に担
持されている現像剤を所定の層厚に規制しかつ摩擦帯電
させる現像剤層規制部材と、一部分が上記現像剤層規制
部材の上記現像剤担持体との接触端部に重ね合わされ、
上記現像剤担持体と上記現像剤容器との間の隙間から外
部への上記現像剤の漏れを防止するシール部材とを備え
る現像装置において、上記シール部材は、上記現像剤層
規制部材の接触端部を受け入れている凹状の段部が設け
られている弾性部材からなることにより達成される。According to the present invention, the above object is to provide a developer container containing a developer, a developer carrier for carrying the developer in the developer container, and A developer layer regulating member that regulates the friction of the developer carried on the developer carrying body to a predetermined layer thickness by friction with the developer carrying body, and frictionally charges the developer; Overlaid on the contact end with the developer carrier,
In a developing device comprising a seal member for preventing the developer from leaking to the outside through a gap between the developer carrier and the developer container, the seal member is a contact end of the developer layer regulating member. This is achieved by comprising an elastic member provided with a concave step for receiving the part.
【0012】[0012]
【作用】本発明の現像装置では、上記現像剤層規制部材
の上記現像剤担持体との接触端部と上記シール部材の一
部分とが互いに重ね合わされ、該シール部材に設けられ
ている凹状の段部は上記現像剤層規制部材の接触端部を
受け入れている。上記現像剤層規制部材の接触端部と上
記シール部材との間には上記現像剤を外部へ導くための
隙間が形成されず、現像剤の漏れは確実に防止される。
また、上記現像剤層規制部材の接触端部を高い圧力で押
圧する必要がなく、上記現像剤の融着は発生しない。In the developing device of the present invention, the contact end of the developer layer regulating member with the developer carrying member and a part of the seal member are overlapped with each other, and a concave step provided in the seal member. The part receives the contact end of the developer layer restriction member. A gap for guiding the developer to the outside is not formed between the contact end of the developer layer regulating member and the seal member, and the developer is reliably prevented from leaking.
Further, it is not necessary to press the contact end portion of the developer layer regulating member with high pressure, and the fusion of the developer does not occur.
【0013】[0013]
【実施例】以下に、本発明の現像装置の実施例について
図面を参照しながら説明する。Embodiments of the developing device of the present invention will be described below with reference to the drawings.
【0014】図1は本発明の現像装置の一実施例を示す
構成図、図2は図1の現像装置の主要部を分解して示す
斜視図、図3は図1の現像装置に用いられているシール
部材を示す斜視図、図4は現像スリーブが現像剤容器に
組み込まれる前におけるシール部材とブレードとの状態
を示す図、図5は現像剤容器に組み込まれている現像ス
リーブとブレードとスクイシートとの状態関係を示す図
である。FIG. 1 is a block diagram showing an embodiment of the developing device of the present invention, FIG. 2 is an exploded perspective view showing the main part of the developing device of FIG. 1, and FIG. 3 is used for the developing device of FIG. 4 is a perspective view showing the sealing member, FIG. 4 is a view showing a state of the sealing member and the blade before the developing sleeve is assembled in the developer container, and FIG. 5 is a developing sleeve and the blade assembled in the developer container. It is a figure which shows the state relationship with a squishy sheet.
【0015】電子写真複写機などの画像形成装置に用い
られる現像装置は、図1および図2に示すように、トナ
ーを収容する現像剤容器2を備える。現像剤容器2には
開口部2aが設けられている。As shown in FIGS. 1 and 2, a developing device used in an image forming apparatus such as an electrophotographic copying machine is provided with a developer container 2 containing a toner. The developer container 2 has an opening 2a.
【0016】現像剤容器2には、トナーを担持しながら
搬送する現像スリーブ3が回転可能に組み込まれてい
る。現像スリーブ3はその外周面の一部が開口部2aか
ら外部へ突出するように現像剤容器2に配置されてい
る。現像スリーブ3は、アルミニウム、ステンレスなど
の非磁性金属材からなる。A developing sleeve 3 for carrying the toner while carrying the toner is rotatably incorporated in the developer container 2. The developing sleeve 3 is arranged in the developer container 2 so that a part of the outer peripheral surface thereof projects outward from the opening 2a. The developing sleeve 3 is made of a non-magnetic metal material such as aluminum or stainless steel.
【0017】現像剤容器2には、現像スリーブ3に担持
されているトナーを所定の層厚に規制しかつ摩擦帯電さ
せるブレード4が取り付けられている。ブレード4は現
像スリーブ3の長手方向に沿って延びる帯状部材からな
り、該部材はゴム材、PETなどの合成樹脂、弾性金属
などの弾性材からなる。ブレード4は、その一方の縁部
が現像スリーブ3の外周面に接触するように現像スリー
ブ3の上方に配置され、かつ現像スリーブ3の回転方向
と逆の方向に向けて弾性変形されている。A blade 4 is attached to the developer container 2 to regulate the toner carried on the developing sleeve 3 to a predetermined layer thickness and to frictionally charge the toner. The blade 4 is made of a belt-shaped member extending along the longitudinal direction of the developing sleeve 3, and the member is made of a rubber material, a synthetic resin such as PET, or an elastic material such as an elastic metal. The blade 4 is arranged above the developing sleeve 3 so that one edge thereof contacts the outer peripheral surface of the developing sleeve 3, and is elastically deformed in a direction opposite to the rotating direction of the developing sleeve 3.
【0018】現像剤容器2にはスクイシート5が取り付
けられ、スクイシート5は現像スリーブ3の外周面と現
像剤容器2との間の隙間から外部へトナーが漏れること
を防止する。スクイシート5は現像スリーブ3の長手方
向に沿って延びる帯状の弾性部材からなる。スクイシー
ト5は、その一方の縁部が現像スリーブ3の外周面に接
触するように現像スリーブ3の下方に配置され、かつ現
像スリーブ3の回転方向と逆の方向に向けて弾性変形さ
れている。A squi sheet 5 is attached to the developer container 2, and the squi sheet 5 prevents toner from leaking to the outside through a gap between the outer peripheral surface of the developing sleeve 3 and the developer container 2. The squi sheet 5 is made of a strip-shaped elastic member extending along the longitudinal direction of the developing sleeve 3. The squi sheet 5 is arranged below the developing sleeve 3 so that one edge thereof contacts the outer peripheral surface of the developing sleeve 3, and is elastically deformed in the direction opposite to the rotating direction of the developing sleeve 3.
【0019】現像剤容器2には、二つのシール部材7が
取り付けられている。各シール部材7は、図1および図
3に示すように、現像スリーブ3の円周方向に沿って延
びる円弧状部材からなり、該円弧状部材は連続気泡が形
成されている発泡材、ゴム材などの弾性材からなる。各
シール部材7の内周面には、ブレード4の角部を受け入
れ可能な凹状の段部7aが形成されている。Two seal members 7 are attached to the developer container 2. As shown in FIGS. 1 and 3, each seal member 7 is formed of an arc-shaped member extending along the circumferential direction of the developing sleeve 3, and the arc-shaped member is a foam material or a rubber material in which open cells are formed. Made of elastic material such as. On the inner peripheral surface of each seal member 7, a concave step portion 7a capable of receiving the corner portion of the blade 4 is formed.
【0020】一方のシール部材7は現像スリーブ3の一
方の端部と現像剤容器3との間に形成されている隙間を
覆い、その内周面は現像スリーブ3の一方の端部におけ
る外周面に所定の圧力で突き合わされている。また、一
方のシール部材7は、図5に示すように、その段部7a
が現像スリーブ3の一方の端部側に位置するブレード4
の一方の角部を受け入れるようにブレード4に重ね合わ
されていることにより、該ブレード4の一方の角部は厚
さ方向に圧縮されているから、ブレード4の一方の角部
の圧縮変形時の外形形状は一方のシール部材7の段部7
aとそれに対向する現像スリーブ3との間に規定される
空間形状に整合され、一方のシール部材7とブレード4
の一方の角部とは互いに密着される。なお、圧縮変形前
すなわち、現像スリーブ3がシール部材7に組み込まれ
る前、図4に示すように、シール部材7とブレード4の
角部とが、ブレード4の角部に対する変形代の間隔をお
いて配置されている。The one seal member 7 covers a gap formed between one end of the developing sleeve 3 and the developer container 3, the inner peripheral surface of which is the outer peripheral surface of the one end of the developing sleeve 3. Are abutted against each other with a predetermined pressure. Further, as shown in FIG. 5, one seal member 7 has a step 7a.
The blade 4 located on one end side of the developing sleeve 3
Since one corner portion of the blade 4 is compressed in the thickness direction by being superposed on the blade 4 so as to receive one corner portion of the blade 4, when one corner portion of the blade 4 is compressed and deformed. The outer shape is the step portion 7 of the one seal member 7.
a and the developing sleeve 3 opposed thereto are matched with a space shape defined by the seal member 7 and the blade 4
One of the corners is in close contact with each other. Before compression deformation, that is, before the developing sleeve 3 is incorporated in the seal member 7, as shown in FIG. 4, the seal member 7 and the corner portion of the blade 4 have a deformation allowance interval with respect to the corner portion of the blade 4. It is arranged.
【0021】他方のシール部材6は、一方のシール部材
6と同様に、現像スリーブ3の他方の端部と現像剤容器
3との間に形成されている隙間を覆い、その内周面は現
像スリーブ3の他方の端部における外周面に所定の圧力
で突き合わされている。また、一方のシール部材7は、
その段部7aが現像スリーブ3の他方の端部側に位置す
るブレード4の一方の角部を受け入れるようにブレード
4に重ね合わされ、該ブレード4の一方の角部は厚さ方
向に圧縮されている。上記ブレード4の一方の角部の圧
縮変形時の外形形状は他方のシール部材7の段部7aと
それに対向する現像スリーブ3の外周面との間に規定さ
れる空間形状に整合され、他方のシール部材7とそれに
対応するブレード4の一方の角部とは互いに密着され
る。Like the one seal member 6, the other seal member 6 covers the gap formed between the other end of the developing sleeve 3 and the developer container 3, and the inner peripheral surface thereof is used for development. The outer peripheral surface of the other end of the sleeve 3 is butted with a predetermined pressure. In addition, one seal member 7 is
The step portion 7a is superposed on the blade 4 so as to receive one corner portion of the blade 4 located on the other end side of the developing sleeve 3, and one corner portion of the blade 4 is compressed in the thickness direction. There is. The outer shape of one corner of the blade 4 at the time of compressive deformation is matched with the space shape defined between the stepped portion 7a of the other seal member 7 and the outer peripheral surface of the developing sleeve 3 opposed to the stepped portion 7a. The seal member 7 and one corner portion of the blade 4 corresponding thereto are brought into close contact with each other.
【0022】よって、各シール部材7とそれに対応する
ブレード4の角部との間には隙間が形成されず、トナー
が各シール部材7とそれに対応するブレード4の角部と
の間から外部へ漏れることはない。Therefore, no gap is formed between each seal member 7 and the corresponding corner portion of the blade 4, and the toner is discharged from between the seal member 7 and the corresponding corner portion of the blade 4 to the outside. It never leaks.
【0023】次に、現像装置に用いられる他のシール部
材について説明する。図6は本発明の現像装置に用いら
れる他のシール部材を示す斜視図、図7は本発明の現像
装置に用いられるさらに他のシール部材を示す斜視図、
図8は本発明の現像装置に用いられるさらに他のシール
部材を示す斜視図である。Next, another seal member used in the developing device will be described. FIG. 6 is a perspective view showing another seal member used in the developing device of the present invention, and FIG. 7 is a perspective view showing yet another seal member used in the developing device of the present invention.
FIG. 8 is a perspective view showing still another seal member used in the developing device of the present invention.
【0024】現像装置に用いられる他のシール部材8
は、図6に示すように、円弧状の基部9および該基部9
の内面に貼り合わされている円弧状の当接部10を有す
る二層構造からなる。当接部10には矩形の切欠き10
aが設けられ、該切欠き10aによって基部9と当接部
10との間にはブレード(図示せず)の端部を受け入れ
る凹状の段部が規定される。Another seal member 8 used in the developing device
Is an arc-shaped base 9 and the base 9 as shown in FIG.
It has a two-layer structure having an arcuate contact portion 10 attached to the inner surface of the. The contact portion 10 has a rectangular notch 10
a is provided, and the notch 10a defines a concave step portion between the base portion 9 and the abutting portion 10 for receiving an end portion of a blade (not shown).
【0025】よって、フェルト材などのように加工形状
に自由度が少ない材料をシール部材に用いるとき、二層
構造にすることによってブレード形状に対応する形状の
段部を容易に形成することができる。Therefore, when a material such as a felt material having a small degree of freedom in the processed shape is used for the seal member, the stepped portion having a shape corresponding to the blade shape can be easily formed by using the two-layer structure. .
【0026】さらに他のシール部材11は、図7に示す
ように、円弧状の基部12および該基部12の内面に貼
り合わされている円弧状の当接部13を有する二層構造
からなる。当接部13には、ブレードの端部を受け入れ
る段部を規定するための切欠き13aが形成されてい
る。基部12は圧縮永久歪が少ない柔軟材、例えば発泡
体からなる。As shown in FIG. 7, still another seal member 11 has a two-layer structure having an arcuate base portion 12 and an arcuate contact portion 13 attached to the inner surface of the base portion 12. The contact portion 13 is formed with a notch 13a for defining a step portion that receives the end portion of the blade. The base 12 is made of a flexible material having a small compression set, such as foam.
【0027】これに対し、当接部13は摺動性が優れて
いるテフロンフェルト材からなる。よって、基部12お
よび当接部13の材質を用途に応じて選択することがで
き、シール性能の向上、寿命の長期化を図ることができ
る。On the other hand, the contact portion 13 is made of Teflon felt material having excellent slidability. Therefore, the materials of the base portion 12 and the contact portion 13 can be selected according to the application, and the sealing performance can be improved and the life can be extended.
【0028】さらに他のシール部材14には、図8に示
すように、ブレードの端部を受け入れる段部14aとと
もにスクイシートを受け入れる段部14bを形成するこ
とができる。As shown in FIG. 8, a step portion 14a for receiving the end portion of the blade and a step portion 14b for receiving the squishe sheet can be formed on still another seal member 14.
【0029】[0029]
【発明の効果】以上に説明したように、本発明の現像装
置によれば、上記シール部材に設けられている凹状の段
部に受け入れられているから、上記現像剤層規制部材の
接触端部と上記シール部材との間に上記現像剤を外部へ
導くための隙間が形成されず、該隙間からの現像剤の漏
れを確実に防止することができる。As described above, according to the developing device of the present invention, since it is received in the concave step portion provided in the seal member, the contact end portion of the developer layer regulating member. A gap for guiding the developer to the outside is not formed between the seal member and the seal member, and it is possible to reliably prevent the developer from leaking from the gap.
【図1】本発明の現像装置の一実施例を示す構成図であ
る。FIG. 1 is a configuration diagram showing an embodiment of a developing device of the present invention.
【図2】図1の現像装置の主要部を分解して示す斜視図
である。FIG. 2 is an exploded perspective view of a main part of the developing device of FIG.
【図3】図1の現像装置に用いられているシール部材を
示す斜視図である。FIG. 3 is a perspective view showing a seal member used in the developing device of FIG.
【図4】現像スリーブが現像剤容器に組み込まれる前に
おけるシール部材とブレードとの状態を示す図である。FIG. 4 is a diagram showing a state of a seal member and a blade before a developing sleeve is incorporated in a developer container.
【図5】現像剤容器に組み込まれている現像スリーブと
シール部材とブレードとスクイシートとの状態関係を示
す図である。FIG. 5 is a diagram showing a state relationship among a developing sleeve, a seal member, a blade, and a squishy sheet which are incorporated in a developer container.
【図6】本発明の現像装置に用いられる他のシール部材
を示す斜視図である。FIG. 6 is a perspective view showing another seal member used in the developing device of the present invention.
【図7】本発明の現像装置に用いられるさらに他のシー
ル部材を示す斜視図である。FIG. 7 is a perspective view showing still another seal member used in the developing device of the present invention.
【図8】本発明の現像装置に用いられるさらに他のシー
ル部材を示す斜視図である。FIG. 8 is a perspective view showing still another seal member used in the developing device of the present invention.
【図9】従来の現像装置を示す構成図である。FIG. 9 is a configuration diagram showing a conventional developing device.
【図10】図9の現像装置の現像スリーブとシール部材
とブレードとスクイシートとの状態関係を示す図であ
る。10 is a diagram showing a state relationship among a developing sleeve, a seal member, a blade, and a squishy sheet of the developing device of FIG.
2 現像剤容器 3 現像スリーブ 4 ブレード(現像剤層規制部材) 5 スクイシート 7,8,11,14 シール部材 9,12 基部 10,13 当接部 7a,14a,14b 段部 10a,13a 切欠き 2 developer container 3 Development sleeve 4 Blade (developer layer control member) 5 Squishy sheet 7,8,11,14 Seal member 9,12 base 10, 13 abutment part 7a, 14a, 14b Step portion 10a, 13a Notches
Claims (5)
剤容器内の現像剤を担持しながら搬送する現像剤担持体
と、該現像剤担持体に接触することによって該現像剤担
持体に担持されている現像剤を所定の層厚に規制しかつ
摩擦帯電させる現像剤層規制部材と、一部分が上記現像
剤層規制部材の上記現像剤担持体との接触端部に重ね合
わされ、上記現像剤担持体と上記現像剤容器との間の隙
間から外部への上記現像剤の漏れを防止するシール部材
とを備える現像装置において、上記シール部材は、上記
現像剤層規制部材の接触端部を受け入れている凹状の段
部が設けられている弾性部材からなることを特徴とする
現像装置。1. A developer container for containing a developer, a developer carrier for carrying the developer in the developer container, and a developer carrier by contacting the developer carrier. A developer layer regulating member that regulates the friction of the developer carried to a predetermined layer thickness and frictionally charges it, and a part thereof is superposed on the contact end of the developer layer regulating member with the developer carrying member, In a developing device including a seal member for preventing the developer from leaking to the outside through a gap between a developer carrier and the developer container, the seal member is a contact end portion of the developer layer regulating member. A developing device comprising an elastic member provided with a concave stepped portion for receiving the toner.
触端部は上記現像剤担持体と上記シール部材との間で圧
縮変形され、該接触端部の圧縮変形による外形形状は上
記段部の形状と整合することとする請求項1に記載の現
像装置。2. The contact end of the developer layer regulating member with the developer carrying member is compressed and deformed between the developer carrying member and the seal member, and the outer shape due to the compressive deformation of the contact end is the above. The developing device according to claim 1, wherein the developing device matches the shape of the step portion.
わされ、現像剤担持体との接触面が形成されている当接
部を有する二層構造からなることとする請求項1または
請求項2に記載の現像装置。3. The seal member has a two-layer structure having a base portion and an abutting portion which is superposed on the base portion and which has a contact surface with a developer carrying member. The developing device described.
材質と当接部の材質とは互いに異なることとする請求項
3に記載の現像装置。4. The developing device according to claim 3, wherein the material of the base portion and the material of the contact portion forming the two-layer structure of the seal member are different from each other.
から外部へ現像剤が漏れることを防止するためのスクイ
シートを備え、シール部材にスクイシートを受け入れる
凹状の段部が設けられていることとする請求項1に記載
の現像装置。5. A squeeze sheet for preventing the developer from leaking to the outside through a gap between the developer container and the developer carrying member, and a seal member having a concave step portion for receiving the squishe sheet. The developing device according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3178917A JPH052322A (en) | 1991-06-25 | 1991-06-25 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3178917A JPH052322A (en) | 1991-06-25 | 1991-06-25 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH052322A true JPH052322A (en) | 1993-01-08 |
Family
ID=16056913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3178917A Pending JPH052322A (en) | 1991-06-25 | 1991-06-25 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH052322A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5592268A (en) * | 1994-07-22 | 1997-01-07 | Brother Kogyo Kabushiki Kaisha | Mechanism to prevent toner leakage from an image forming unit |
EP0881549A1 (en) * | 1997-05-27 | 1998-12-02 | Sharp Kabushiki Kaisha | Developing apparatus |
JP2003345127A (en) * | 2002-05-29 | 2003-12-03 | Samsung Electronics Co Ltd | Developing device |
US7110697B2 (en) | 2004-04-29 | 2006-09-19 | Samsung Electronics Co., Ltd. | Developer layer thickness regulating device for a developing unit |
JP2008181047A (en) * | 2007-01-26 | 2008-08-07 | Ricoh Co Ltd | Developing device, process cartridge and image forming apparatus |
JP2013156526A (en) * | 2012-01-31 | 2013-08-15 | Brother Ind Ltd | Developing device |
JP2016170210A (en) * | 2015-03-11 | 2016-09-23 | キヤノン株式会社 | Development device, process cartridge and image formation apparatus |
JP2017015905A (en) * | 2015-06-30 | 2017-01-19 | キヤノン株式会社 | Sealing member, unit, and image forming apparatus |
-
1991
- 1991-06-25 JP JP3178917A patent/JPH052322A/en active Pending
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5592268A (en) * | 1994-07-22 | 1997-01-07 | Brother Kogyo Kabushiki Kaisha | Mechanism to prevent toner leakage from an image forming unit |
EP0881549A1 (en) * | 1997-05-27 | 1998-12-02 | Sharp Kabushiki Kaisha | Developing apparatus |
EP1282014A2 (en) * | 1997-05-27 | 2003-02-05 | Sharp Kabushiki Kaisha | Developing apparatus with a seal on the back side of a toner layer thickness control member |
EP1282014A3 (en) * | 1997-05-27 | 2003-02-19 | Sharp Kabushiki Kaisha | Developing apparatus with a seal on the back side of a toner layer thickness control member |
JP2003345127A (en) * | 2002-05-29 | 2003-12-03 | Samsung Electronics Co Ltd | Developing device |
KR100449723B1 (en) * | 2002-05-29 | 2004-09-22 | 삼성전자주식회사 | Developing apparatus having a sealing means preventing toner leakage |
US7110697B2 (en) | 2004-04-29 | 2006-09-19 | Samsung Electronics Co., Ltd. | Developer layer thickness regulating device for a developing unit |
JP2008181047A (en) * | 2007-01-26 | 2008-08-07 | Ricoh Co Ltd | Developing device, process cartridge and image forming apparatus |
JP2013156526A (en) * | 2012-01-31 | 2013-08-15 | Brother Ind Ltd | Developing device |
JP2016170210A (en) * | 2015-03-11 | 2016-09-23 | キヤノン株式会社 | Development device, process cartridge and image formation apparatus |
JP2017015905A (en) * | 2015-06-30 | 2017-01-19 | キヤノン株式会社 | Sealing member, unit, and image forming apparatus |
CN107810449A (en) * | 2015-06-30 | 2018-03-16 | 佳能株式会社 | Seal member, unit and imaging device |
US10962900B2 (en) | 2015-06-30 | 2021-03-30 | Canon Kabushiki Kaisha | Seal member, unit, and image forming apparatus |
CN107810449B (en) * | 2015-06-30 | 2021-04-02 | 佳能株式会社 | Sealing member, unit, and image forming apparatus |
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