JP2773184B2 - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JP2773184B2 JP2773184B2 JP1031830A JP3183089A JP2773184B2 JP 2773184 B2 JP2773184 B2 JP 2773184B2 JP 1031830 A JP1031830 A JP 1031830A JP 3183089 A JP3183089 A JP 3183089A JP 2773184 B2 JP2773184 B2 JP 2773184B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developing device
- thin film
- film sleeve
- sealing member
- 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.)
- Expired - Lifetime
Links
Landscapes
- Dry Development In Electrophotography (AREA)
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。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device such as a copying machine, a printer, and a facsimile by an electrophotographic method.
〔従来の技術〕 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。[Prior Art] Conventionally, the developing device 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
てある。In the developing device 1, a driving roller 3 is provided in front of a developing tank 2.
Are disposed, and the drive roller 3 is covered with a thin film sleeve 4.
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
てある。The thin film sleeve 4 is made of a resin sheet such as polyester or a metal thin film. The outer surface is roughened by blasting or the like, and the circumference thereof 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が圧接しており、
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との間もシールされてい
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が圧接してある。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が設けてある。At both ends of the thin film sleeve 4, as shown in FIG.
The sealing member 5 provided between the developing tank 2 and the developing tank 2 is in pressure contact,
In addition to preventing toner from leaking from between the developing tank 2 and the thin film sleeve 4, the thin film sleeve 4 is brought into close contact with the outer peripheral surface of the driving roller 3, and the slack of the thin film sleeve 4 is concentrated on the front part, and , A space S is formed between the thin film sleeve 4 and the driving roller 3. Of course, the space between the bottom of the thin film sleeve 4 and the developing tank 2 is also sealed. Further, a front end regulating portion 9 of a regulating member 8 is pressed against the rear outer peripheral surface of the thin film sleeve 4. Furthermore, a sealing member
A stopper 13 for preventing the thin film sleeve 4 from being biased is provided on the outer portions of the members 5 and 5, respectively.
なお、薄膜スリーブ４と駆動ローラ３との摩擦係数を
μ１、薄膜スリーブ４とシール部材５との摩擦係数をμ
２とすると、μ１＞μ２の関係が付与されている。The friction coefficient between the thin film sleeve 4 and the drive roller 3 is μ 1 , and the friction coefficient between the thin film sleeve 4 and the seal member 5 is μ
When 2, the relationship of mu 1> mu 2 are 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、非磁性のトナーが収
容してある。A toner container 14 is formed at the rear of the developing tank 2, and stirring blades 15 and 16 are arranged therein to store non-magnetic toner.
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。また、トナー収容部14におい
て、薄膜スリーブ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。In the developing device 1 having the above configuration, the toner container 14
Is moved in the direction of the arrow by the rotation of the stirring blades 15 and 16, and the thin film sleeve 4 moves in the direction of the arrow a with the rotation of the drive roller 3. Further, in the toner storage section 14, the toner held on the outer peripheral portion of the thin film sleeve 4 is regulated by the regulation section 9 and becomes a charged toner thin layer when passing therethrough.
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20上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 an electrostatic latent image on the photoconductor 20.
しかしながら、前記現像装置１では、第４図に示すよ
うに、規制部９の両端部は、単にシール部材５の側面に
当接させているだけで、これらの間のシール性が不完全
であったため、規制部９とシール部材５との間から収容
部13のトナーがそのまま搬送され、これが感光体20に付
着して画像上にかぶりを生じたり、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。However, in the developing device 1, as shown in FIG. 4, both ends of the regulating portion 9 are merely brought into contact with the side surfaces of the sealing member 5, and the sealing property between them is incomplete. Therefore, the toner in the storage unit 13 is transported as it is from between the regulating unit 9 and the seal member 5 and adheres to the photoreceptor 20 to cause fogging on the image or drop from the developing device to stain the inside of the machine. Had problems.
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上から
弾性材でシールしたものである。The present invention has been made in order to solve the above problems, and a rotating body that rotates while supporting toner on an outer peripheral portion, and a tip end portion is pressed against the outer peripheral portion of the rotating body to remove toner on the rotating body. In a developing device comprising a regulating means for regulating, and a sealing member contacting the outer peripheral portions on both sides of the rotating body on both sides of the tip of the regulating means, the tip of the regulating member extends to a contact area of the sealing member, A notch surrounding the extension of the regulating member is provided in the sealing member, and the notch is sealed with an elastic material from above the extension.
前記現像装置によれば、シール部材の側面に沿って搬
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。According to the developing device, the toner conveyed along the side surface of the seal member is regulated by the extending portion of the regulation member,
The regulated toner moves laterally along the tip of the regulating member.
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 moved to the seal member is regulated by the elastic material,
Intrusion into the notch is substantially prevented.
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。FIGS. 1 to 3 show a main part of a developing device according to the present invention,
Other configurations not shown are the same as those of the developing device 1 of FIG. 5 described above. Therefore, the description is also 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てある。In these figures, the leading end regulating portion 9 of the regulating member 8 is
The drive roller 3 extends in the axial direction, and the extension 10 is located in a contact area of the seal 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の上に切欠部６を
覆う弾性材11が配置され、第２図において一点鎖線で示
す部分12を図示しない押圧部材で押圧し、伸長部10を囲
む切欠部６がシールされている。The sealing member 5 is provided with a concave notch 6 surrounding the extension 10, and an elastic material 11 covering the notch 6 is disposed on the extension 10, and is indicated by a dashed line in FIG. The portion 12 shown is pressed by a pressing member (not shown), and the notch 6 surrounding the extension 10 is sealed.
なお、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弾性材に前記樹脂シ
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 the sealing member 5, a resin sheet such as polyethylene, nylon, polyacetal, or polypropylene, or a resin sheet attached to an elastic material such as polyurethane foam is used. The sealing member 5 is pressed against the thin-film sleeve 4 by pulling both ends or interposing an elastic material between the sealing member 5 and the developing tank 2 behind the sealing member 5 while being arranged as shown in the figure. Further, as the elastic material 11, polyurethane foam, malt plain or the like is 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に保持されたトナー収容部14のトナーは、規
制部材８の先端規制部９で規制されてトナー薄膜に成形
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 toner storage unit 14 held by the thin film sleeve 4 that moves together with the drive roller 3 is regulated by the tip regulation unit 9 of the regulation member 8 to be formed into a toner thin film. In addition, a part of the toner regulated at both ends of the regulation unit 9 moves along the regulation unit 9.
そして、シール部材５側に移動したトナーは、弾性材
11で規制され、殆どトナー収容部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10の先
端部を迂回しながら規制部９の下流側に流出する。しか
し、伸長部10の周囲は弾性材11が位置しているので、そ
こでのトナーの移動抵抗が大きく、伸長部10の周囲には
トナーが詰まった状態になり、実質的に下流側に漏れ出
るトナーは極めて僅かである。Then, the toner that has moved to the sealing member 5 side is an elastic material.
Although regulated by 11 and almost falling into the toner storage unit 14,
Part of the toner enters the area of the notch 6 and flows out downstream of the regulating section 9 while bypassing the tip of the extending section 10. However, since the elastic member 11 is located around the extension 10, the toner has a high resistance to the movement of the toner there, and the toner is clogged around the extension 10 and substantially leaks to the downstream side. Very little toner.
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
たが、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-described embodiment, the developing device that carries the toner on the thin film sleeve 4 provided outside the driving roller 3 has been described. However, the present invention is also applicable to a developing device that directly carries the toner on the driving roller 3. is there.
以上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 apparent from the above description, in the developing device according to the present invention, the amount of toner leaking from between the sealing members at both ends of the rotating body and the regulating member is extremely small.
したがって、かぶり等のない高品質の画像を得ること
ができるとともに、機械内部を清潔に維持することがで
きる。Therefore, a high-quality image without fogging can be obtained, and the inside of the machine can be kept 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。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 developing tank, 3 driving roller, 4
... thin film sleeve, 5 ... sealing member, 6 ... notch,
8: regulating member, 9: regulating portion, 10: extending portion, 11 ...
Elastic material, 13: toner container, 20: photoconductor, S: space.
Claims (1)
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
の上から弾性材でシールしたことを特徴とする現像装
置。A rotating member which rotates while supporting the toner on the outer peripheral portion; a restricting portion which presses a tip portion against the outer peripheral portion of the rotating member to regulate the toner on the rotating member; A developing device having a sealing member that is in contact with both outer peripheral portions of the rotating body on both sides; a notch surrounding the extending portion of the restricting member with the seal member while extending a tip end of the restricting member into a contact region of the sealing member; A developing device, wherein the cutout portion is sealed with an elastic material from above the elongated portion.
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 JPH02210475A (en) | 1990-08-21 |
| JP2773184B2 true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2646393B2 (en) * | 1989-05-31 | 1997-08-27 | キヤノン株式会社 | Developing device |
| JP3064436B2 (en) * | 1991-02-06 | 2000-07-12 | 株式会社リコー | Developing device |
| JPH05289484A (en) * | 1992-04-10 | 1993-11-05 | Fuji Xerox Co Ltd | Developing device |
| JP4968957B2 (en) * | 2008-03-31 | 2012-07-04 | キヤノン株式会社 | Frame body unit, developing device and process cartridge, and frame body unit, developing device and process cartridge manufacturing method |
| JP5312626B2 (en) * | 2008-03-31 | 2013-10-09 | キヤノン株式会社 | Frame unit, developing device and process cartridge |
| JP5099202B2 (en) | 2010-09-30 | 2012-12-19 | ブラザー工業株式会社 | Developing device, process unit, and image forming apparatus |
| JP5099201B2 (en) | 2010-09-30 | 2012-12-19 | ブラザー工業株式会社 | Developing device, process unit, and image forming apparatus |
| JP5510416B2 (en) | 2011-08-31 | 2014-06-04 | ブラザー工業株式会社 | Development device |
-
1989
- 1989-02-10 JP JP1031830A patent/JP2773184B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02210475A (en) | 1990-08-21 |
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