JPH02210475A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH02210475A JPH02210475A JP1031830A JP3183089A JPH02210475A JP H02210475 A JPH02210475 A JP H02210475A JP 1031830 A JP1031830 A JP 1031830A JP 3183089 A JP3183089 A JP 3183089A JP H02210475 A JPH02210475 A JP H02210475A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developing device
- elastic material
- regulating
- notched
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000013013 elastic material Substances 0.000 claims abstract description 13
- 239000000565 sealant Substances 0.000 abstract 4
- 239000010409 thin film Substances 0.000 description 19
- 108091008695 photoreceptors Proteins 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子写真法による複写機、プリンタ、ファク
シミリ等の現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a developing device for an electrophotographic copying machine, printer, facsimile, or the like.
従来、前記現像装置として、第５図に示すものが提案さ
れている。Conventionally, as the developing device, one shown in FIG. 5 has been proposed.
この現像装置１では、現像槽２の前部に駆動ローラ３が
配置され、該駆動ローラ３に薄膜スリーブ４が外装しで
ある。In this developing device 1, a driving roller 3 is disposed in front of a developing tank 2, and a thin film sleeve 4 is wrapped around the driving roller 3.
薄膜スリーブ４は、ポリエステル等の樹脂シート又は金
属薄膜等からなり、外面はブラスト処理等によって粗面
化され、その周長は駆動ローラ３の周長よりも長くしで
ある。The thin film sleeve 4 is made of a resin sheet such as polyester or a thin metal film, and its outer surface is roughened by blasting or the like, and its circumference is longer than the circumference of the drive roller 3.
薄膜スリーブ４の両端部には、第４図に示すように、現
像槽２との間に設けたシール部材５か圧接しており、現
像槽２と薄膜スリーブ４との間からのトナーの漏れを防
止するとともに、薄膜スリーブ４を駆動ローラ３の外周
面に密着させ、薄膜スリーブ４の弛みを前部に集中し、
感光体２０との対向部において、薄膜スリーブ４と駆動
ローラ３の間に空間部Ｓが形成されている。勿論、薄膜
スリーブ４の底部と現像槽２との間もソールされている
。また、薄膜スリーブ４の後部外周面には、規制部材８
の先端規制部９か圧接しである。さらに、シール部材５
，５の外側部には夫々薄膜スリーブ４の片寄りを防止す
るストッパ１３か設けてある。As shown in FIG. 4, seal members 5 provided between the thin film sleeve 4 and the developer tank 2 are in pressure contact with both ends of the thin film sleeve 4 to prevent toner from leaking between the developer tank 2 and the thin film sleeve 4. At the same time, the thin film sleeve 4 is brought into close contact with the outer peripheral surface of the drive roller 3, and the slack of the thin film sleeve 4 is concentrated in the front part.
A space S is formed between the thin film sleeve 4 and the drive roller 3 at a portion facing the photoreceptor 20 . Of course, soles are also provided between the bottom of the thin film sleeve 4 and the developer tank 2. Further, a regulating member 8 is provided on the rear outer peripheral surface of the thin film sleeve 4.
The end regulating portion 9 is in pressure contact. Furthermore, the seal member 5
, 5 are each provided with a stopper 13 for preventing the thin film sleeve 4 from shifting.
なお、薄膜スリーブ４と駆動ローラ３との摩擦係数をμ
ｍ、薄膜スリーブ４とソール部材５との摩擦係数をμ２
とすると、μｍ〉μ２の関係が付与されている。In addition, the coefficient of friction between the thin film sleeve 4 and the drive roller 3 is μ
m, the coefficient of friction between the thin film sleeve 4 and the sole member 5 is μ2
Then, the relationship μm>μ2 is given.
現像槽２の後部には、トナー収容部１４が形成され、そ
こには撹拌羽根１５．１６が配置され、非磁性のトナー
か収容しである。A toner storage section 14 is formed at the rear of the developer tank 2, in which stirring blades 15 and 16 are arranged, and non-magnetic toner is stored therein.
以上の構成を備えた現像装置１では、トナー収容部１４
のトナーは、撹拌羽根１５．１６の回転によって矢印方
向に移動し、駆動ローラ３の回転とともに薄膜スリーブ
４が矢印ａ方向に移動する。In the developing device 1 having the above configuration, the toner storage section 14
The toner is moved in the direction of the arrow a by the rotation of the stirring blades 15, 16, and the thin film sleeve 4 is moved in the direction of the arrow a as the drive roller 3 rotates.
また、トナー収容部１４において、薄膜スリーフ４の外
周部に保持されたトナーは規制部９で規制され、ここを
通過する際に荷電トナー薄層となる。Further, in the toner storage section 14, the toner held on the outer periphery of the thin film sleeve 4 is regulated by a regulating section 9, and becomes a thin layer of charged toner when passing through this.
前記荷電トナー薄層は、感光体２０との対向部に搬送さ
れ、感光体２０Ｊ：の静電潜像に供給される。The charged toner thin layer is conveyed to a portion facing the photoconductor 20, and is supplied to the electrostatic latent image on the photoconductor 20J.
しかしなから、前記現像装置ｌては、第４図にて搬送さ
れてきたトナーは、規制部材の伸長部で規制され、この
規制されたトナーが規制部材の先端部に沿って側方に移
動する。However, in the developing device l, the toner conveyed as shown in FIG. do.
シール部材側に移動したトナーは弾性材で規制され、切
欠部への侵入はほぼ阻止される。The toner that has moved toward the sealing member is regulated by the elastic material, and is almost prevented from entering the notch.
以下、本発明の具体例について、添付図面を参照して説
明する。Hereinafter, specific examples of the present invention will be described with reference to the accompanying drawings.
第１〜３図は本発明にかかる現像装置の要部を示し、図
示されていないその他の構成は前述した第５図の現像装
置１と同一である。したがって、説明も省略する。1 to 3 show essential parts of a developing device according to the present invention, and the other components not shown are the same as the developing device 1 shown in FIG. 5 described above. Therefore, the explanation will also be omitted.
これらの図において、規制部材８の先端規制部９は、駆
動ローラ３の軸方向に伸長してあり、この伸長部１０が
シール部材５の接触領域に位置させである。In these figures, the distal end regulating portion 9 of the regulating member 8 extends in the axial direction of the drive roller 3, and this extending portion 10 is positioned in the contact area of the sealing member 5.
シール部材５には、前記伸長部１０を囲むように凹状の
切欠部６が設けてあり、前記伸長部１０の」二に切欠部
６を覆う弾性材１１が配置され、第２図おいて一点鎖線
で示す部分１２を図示しない示すように、規制部９の両
側部は、月１にシール部材５の側面に当接させているた
けて、これらの間のシール性が不完全てあったため、規
制部９と７一ル部材５との間から収容部１３のトナーか
そのまま搬送され、これが感光体２０に４１１着して画
像上にかぶりを生したり、現像装置から落下して機械内
部を汚すという問題点を有していた。The sealing member 5 is provided with a concave notch 6 so as to surround the elongated portion 10, and an elastic material 11 covering the notch 6 is disposed on the second side of the elongated portion 10. As shown in the figure, the portion 12 indicated by the chain line is not shown, since both side portions of the regulating portion 9 were in contact with the side surfaces of the sealing member 5 during the month 1, the sealing performance between these portions was incomplete. The toner in the storage section 13 is conveyed as it is from between the regulating section 9 and the 7-fold member 5, and this may land on the photoreceptor 20 and cause a fog on the image, or may fall from the developing device and cause damage to the inside of the machine. It had the problem of getting dirty.
本発明は、前記問題点を解決するためになされたもので
、外周部にトナーを担持して回転する回転体と、該回転
体の外周部に先端部を圧接し、回転体上のトナーを規制
する規制手段と、該規制手段の先端部両側で前記回転体
の両側外周部に接するシール部材とを備えた現像装置に
おいて、前記規制部材の先端部をシール部材の接触領域
に伸長する一方、前記シール部材に規制部材の伸長部を
囲む切欠部を設け、この切欠部を前記伸長部の１−から
弾性材でシールしたものである。The present invention has been made to solve the above-mentioned problems, and includes a rotating body that carries toner on its outer periphery and a tip end pressed against the outer periphery of the rotating body to remove the toner on the rotating body. In a developing device comprising a regulating means for regulating, and a sealing member that contacts both outer circumferences of the rotary body on both sides of the distal end of the regulating means, the distal end of the regulating member extends into a contact area of the sealing member; The sealing member is provided with a notch that surrounds the elongated portion of the regulating member, and this notch is sealed from 1- of the elongated portion with an elastic material.
前記現像装置によれば、シール部材の側面に沿っ抑圧部
材で押圧し、伸長部］Ｏを囲む切欠部６かシールされて
いる。According to the developing device, the notch 6 surrounding the extension part]O is sealed by pressing the suppressing member along the side surface of the sealing member.
ナオ、シール部材５としては、ポリエチレン、ナイロン
、ポリアセタール、ポリプロピレンなどの樹脂シート、
又はポリウレタンフォーム等の弓中性材に前記樹脂シー
トを取り付けたものが使用される。また、シール部材５
は、図示するように配置された状態で、両端を引っ張り
、又はシール部材５とその背後の現像槽２との間に弾性
材を介在して薄膜スリーブ４に圧接される。また、弾性
材１１としては、ポリウレタンフォーム、モルトプレー
ンなどが使用される。As for the sealing member 5, resin sheets such as polyethylene, nylon, polyacetal, polypropylene, etc.
Alternatively, the resin sheet may be attached to a neutral material such as polyurethane foam. In addition, the seal member 5
is placed as shown in the figure and is pressed against the thin film sleeve 4 by pulling both ends or by interposing an elastic material between the sealing member 5 and the developer tank 2 behind it. Further, as the elastic material 11, polyurethane foam, maltplane, etc. are used.
前記現像装置では、駆動ローラ３と共に移動する薄膜ス
リーブ４に保持された１−ナー収容部１４のトナーは、
規制部材８の先端規制部って規制されてトナー薄層に成
形される。また、規制部９の両端側で規制されたトナー
の一部は、規制部９に沿って移動する。In the developing device, the toner in the 1-toner storage section 14 held by the thin film sleeve 4 that moves together with the drive roller 3 is
The end regulating portion of the regulating member 8 is regulated and formed into a thin toner layer. Further, a portion of the toner regulated at both ends of the regulating section 9 moves along the regulating section 9 .
そして、シール部材５側に移動したトナーは、弾性材１
１で規制され、殆どｊ・ナー収容部１４に落下するもの
の、一部のトナーは切欠部６の領域に侵入し、伸長部１
０の先端部を迂回しなから規制部９の下流側に流ｉＪ３
する。しかし、伸長部１０の周囲は弾性材１１か位置し
ているので、そこでのトナーの移動抵抗か大きく、伸長
部１０の周囲にはトナーか詰まった状態になり、実質的
に下流側に漏れ出る］・ナーは極めて僅かである。Then, the toner that has moved to the sealing member 5 side is transferred to the elastic material 1
1, and most of the toner falls into the toner storage section 14, but some of the toner enters the region of the cutout section 6 and falls into the extension section 1.
iJ3 flows downstream of the regulating part 9 without bypassing the tip of the
do. However, since the elastic material 11 is located around the extension part 10, the movement resistance of the toner there is large, and the area around the extension part 10 becomes clogged with toner, which essentially leaks to the downstream side. ]・Na is extremely small.
なお、前記実施例では、駆動ローラ３に外装した薄膜ス
リーブ４にトナーを担持する現像装置について説明した
か、駆動ローラ３に直接トナーを担持する形態の現像装
置にも、本発明は適用可能である。In the above embodiments, the developing device in which the toner is carried on the thin film sleeve 4 mounted on the drive roller 3 has been described, but the present invention is also applicable to a developing device in which the toner is carried directly on the drive roller 3. be.
以」−の説明で明らかなように、本発明にかかる現像装
置では、回転体の両端シール部材と規制部材との間から
漏れ出るトナーは極めて僅かである。As is clear from the following explanation, in the developing device according to the present invention, very little toner leaks out from between the sealing member at both ends of the rotating body and the regulating member.
したがって、かぶり等のない高品質の画像を得ることか
できるとともに、機械内部を清潔に維持することができ
る。Therefore, it is possible to obtain high-quality images without fogging and the like, and it is also possible to keep the inside of the machine clean.
第１〜３図は本発明にかかる現像装置の部分斜視図、第
４図は従来の現像装置の部分斜視図、第５図は現像装置
の断面図である。
１・現像装置、２ 現像槽、３・駆動ローラ、４・・薄
膜スリーブ、５ シール部材、６ 切欠部、８ 規制部
材、９ 規制部、１０ ・伸長部、１１・弾性材、１３
トナー収容部、２０ 感光体、Ｓ 空間部。
特許出願人 ミノルタカメラ株式会社
代理人 弁理士 青白 葆 ほか１名1 to 3 are partial perspective views of a developing device according to the present invention, FIG. 4 is a partial perspective view of a conventional developing device, and FIG. 5 is a sectional view of the developing device. 1. Developing device, 2. Developer tank, 3. Drive roller, 4. Thin film sleeve, 5. Seal member, 6. Notch, 8. Regulating member, 9. Regulating portion, 10. Extension portion, 11. Elastic material, 13.
Toner storage section, 20 photoreceptor, S space section. Patent applicant: Minolta Camera Co., Ltd. Agent Patent attorney: Aohaku Ao and 1 other person
Claims (1)
回転体の外周部に先端部を圧接し、回転体上のトナーを
規制する規制手段と、該規制手段の先端部両側で前記回
転体の両側外周部に接するシール部材とを備えた現像装
置において、前記規制部材の先端部をシール部材の接触
領域に伸長する一方、前記シール部材に規制部材の伸長
部を囲む切欠部を設け、この切欠部を前記伸長部の上か
ら弾性材でシールしたことを特徴とする現像装置。(1) A rotating body that carries toner on its outer periphery and rotates, a regulating means that presses the tip of the rotating body against the outer periphery of the rotating body and regulates the toner on the rotating body, and a regulating means on both sides of the distal end of the regulating means. In the developing device, the developing device includes seal members that are in contact with both outer circumferential portions of the rotating body, wherein the distal end of the regulating member extends into a contact area of the sealing member, and the sealing member has a notch that surrounds the extending portion of the regulating member. A developing device characterized in that the notch is provided above the extension portion and sealed with an elastic material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1031830A JP2773184B2 (en) | 1989-02-10 | 1989-02-10 | Developing device |
| US07/476,609 US5057868A (en) | 1989-02-10 | 1990-02-07 | Developing apparatus having a sealing construction for preventing a toner leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1031830A JP2773184B2 (en) | 1989-02-10 | 1989-02-10 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02210475A true JPH02210475A (en) | 1990-08-21 |
| JP2773184B2 JP2773184B2 (en) | 1998-07-09 |
Family
ID=12341990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1031830A Expired - Lifetime JP2773184B2 (en) | 1989-02-10 | 1989-02-10 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2773184B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034255A (en) * | 1989-05-31 | 1991-01-10 | Canon Inc | Developing device |
| DE4203271A1 (en) * | 1991-02-06 | 1992-08-13 | Ricoh Kk | DEVELOPMENT UNIT FOR AN IMAGE RECORDING DEVICE |
| JPH05289484A (en) * | 1992-04-10 | 1993-11-05 | Fuji Xerox Co Ltd | Developing device |
| JP2009265612A (en) * | 2008-03-31 | 2009-11-12 | Canon Inc | Developing device frame unit, developing device, process cartridge, and method of manufacturing developing device frame unit |
| JP2012078380A (en) * | 2010-09-30 | 2012-04-19 | Brother Ind Ltd | Developing device, process unit and image forming apparatus |
| JP2012078381A (en) * | 2010-09-30 | 2012-04-19 | Brother Ind Ltd | Developing device, process unit and image forming apparatus |
| JP2012118566A (en) * | 2008-03-31 | 2012-06-21 | Canon Inc | Frame body unit, development unit, and process cartridge |
| US9020389B2 (en) | 2011-08-31 | 2015-04-28 | Brother Kogyo Kabushiki Kaisha | Developing device for preventing toner leakage |
-
1989
- 1989-02-10 JP JP1031830A patent/JP2773184B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034255A (en) * | 1989-05-31 | 1991-01-10 | Canon Inc | Developing device |
| DE4203271A1 (en) * | 1991-02-06 | 1992-08-13 | Ricoh Kk | DEVELOPMENT UNIT FOR AN IMAGE RECORDING DEVICE |
| JPH05289484A (en) * | 1992-04-10 | 1993-11-05 | Fuji Xerox Co Ltd | Developing device |
| JP2009265612A (en) * | 2008-03-31 | 2009-11-12 | Canon Inc | Developing device frame unit, developing device, process cartridge, and method of manufacturing developing device frame unit |
| JP2012118566A (en) * | 2008-03-31 | 2012-06-21 | Canon Inc | Frame body unit, development unit, and process cartridge |
| JP2012078380A (en) * | 2010-09-30 | 2012-04-19 | Brother Ind Ltd | Developing device, process unit and image forming apparatus |
| JP2012078381A (en) * | 2010-09-30 | 2012-04-19 | Brother Ind Ltd | Developing device, process unit and image forming apparatus |
| US8521055B2 (en) | 2010-09-30 | 2013-08-27 | Brother Kogyo Kabushiki Kaisha | Developing device provided with thickness-regulation member resistant to abrasion |
| US8948648B2 (en) | 2010-09-30 | 2015-02-03 | Brother Kogyo Kabushiki Kaisha | Developing device provided with sealing members assembled to thickness-regulation member |
| US9020389B2 (en) | 2011-08-31 | 2015-04-28 | Brother Kogyo Kabushiki Kaisha | Developing device for preventing toner leakage |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2773184B2 (en) | 1998-07-09 |
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