JP3212797B2 - Developing device for electrophotographic equipment - Google Patents
Developing device for electrophotographic equipmentInfo
- Publication number
- JP3212797B2 JP3212797B2 JP15416694A JP15416694A JP3212797B2 JP 3212797 B2 JP3212797 B2 JP 3212797B2 JP 15416694 A JP15416694 A JP 15416694A JP 15416694 A JP15416694 A JP 15416694A JP 3212797 B2 JP3212797 B2 JP 3212797B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing
- roller
- supply roller
- chamber
- 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 - Fee Related
Links
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- Dry Development In Electrophotography (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、レーザを用いた、プ
リンタ・複写機・ファクシミリなど、電子写真方式によ
って用紙に記録を行う電子写真装置に適用しうる。詳し
くは、その電子写真装置において、現像剤を供給ローラ
で現像ローラに供給し、その供給した現像剤を薄層化部
材で薄層化し、その薄層化した現像剤を現像ローラで感
光体に転移してその感光体上の潜像を可視像化する現像
装置に関する。The present invention can be applied to an electrophotographic apparatus for recording on paper by an electrophotographic method, such as a printer, a copying machine, and a facsimile, using a laser. Specifically, in the electrophotographic apparatus, a developer is supplied to a developing roller by a supply roller, the supplied developer is thinned by a thinning member, and the thinned developer is applied to a photoconductor by a developing roller. The present invention relates to a developing device that transfers and visualizes a latent image on a photoconductor.
【０００２】[0002]
【従来の技術】従来、この種の現像装置の中には、たと
えば図８に示すように、現像ケース１内に図中右側の現
像剤収納室２と左側の現像室３間を仕切る仕切り壁１ａ
を備え、その仕切り壁１ａに現像室３の図中奥行き方向
に長い開口Ｓを設け、その開口Ｓの周縁にスポンジ製の
供給ローラ４のローラ部４ａを押し当て、そのローラ部
４ａをまた現像ローラ５に押し当てる構成としたものが
ある。2. Description of the Related Art Conventionally, in a developing device of this type, as shown in FIG. 8, for example, a partition wall for partitioning between a developer accommodating chamber 2 on the right side and a developing chamber 3 on the left side in a developing case 1 is shown. 1a
A long opening S is provided in the partition wall 1a in the depth direction of the developing chamber 3 in the drawing, and the roller 4a of the sponge supply roller 4 is pressed against the periphery of the opening S, and the roller 4a is again developed. There is a configuration in which the roller is pressed against the roller 5.
【０００３】そして、現像時、現像剤収納室２からアジ
テータ６で現像室３に向けて現像剤を送り出して供給ロ
ーラ４に付着し、その供給ローラ４で摩擦帯電して現像
ローラ５に供給し、その現像剤を薄層ブレード７で薄層
化し、その薄層化した現像剤を現像ローラ５で感光体８
に静電的に転移してその感光体８上の潜像を可視像化し
ていた。At the time of development, the developer is sent out from the developer accommodating chamber 2 toward the developing chamber 3 by the agitator 6 and adheres to the supply roller 4. The developer is frictionally charged by the supply roller 4 and supplied to the developing roller 5. The developer is thinned by a thin blade 7, and the thinned developer is applied to a photoconductor 8 by a developing roller 5.
And the latent image on the photoconductor 8 was visualized.
【０００４】[0004]
【発明が解決しようとする課題】ところで、現像剤を薄
層化する際、余分の現像剤は、現像ローラ５から薄層ブ
レード７で掻き落とされる。また、現像時、現像ローラ
５から感光体８に転移せずに残った現像剤は、供給ロー
ラ４で掻き落とされる。そして、それら現像剤の多く
は、通常、現像ローラ５の両端部の下側に集まり、さら
に再使用のため、現像室３の底部の傾斜に従い現像剤収
納室２へ向けて流れる。When the developer is thinned, excess developer is scraped off from the developing roller 5 by a thin blade 7. Further, at the time of development, the developer remaining without being transferred from the developing roller 5 to the photoconductor 8 is scraped off by the supply roller 4. Most of the developer usually collects below both ends of the developing roller 5 and flows toward the developer accommodating chamber 2 according to the inclination of the bottom of the developing chamber 3 for reuse.
【０００５】ところが、上述した従来の現像装置では、
開口Ｓのほとんどを供給ローラ４で塞いでいるから、そ
のように現像剤収納室２へ向かう現像剤の流れが止めら
れ、そのため、現像剤が現像剤収納室２へと移動できず
に現像ローラ５の両端部側に溜ってしまう。すると、そ
の現像ローラ５の、特に両端部周面で現像剤量が多くな
り、それが原因で、感光体８の両端側で可視像が濃くな
って画像品質が低下したり、また現像ローラ５の両端部
から現像剤があふれて装置外へ飛散したりするなどの問
題があった。However, in the conventional developing device described above,
Since most of the opening S is closed by the supply roller 4, the flow of the developer toward the developer storage chamber 2 is stopped in such a manner, so that the developer cannot move to the developer storage chamber 2 and the 5 accumulate at both ends. As a result, the amount of the developer is increased particularly at the peripheral surfaces of both ends of the developing roller 5, and as a result, the visible image is darkened at both ends of the photoconductor 8 and the image quality is deteriorated. There was a problem that the developer overflowed from both ends of the sample No. 5 and scattered outside the apparatus.
【０００６】そこで、この発明の目的は、現像ローラか
ら掻き落とした現像剤がその現像ローラの両端部側に溜
ることを防いで画像品質の低下や現像剤の飛散などの弊
害発生を防止することにある。SUMMARY OF THE INVENTION It is an object of the present invention to prevent a developer scraped from a developing roller from collecting on both ends of the developing roller to prevent adverse effects such as deterioration of image quality and scattering of the developer. It is in.
【０００７】[0007]
【課題を解決するための手段】そのため、請求項１に記
載のものは、たとえば以下の図示実施例に示すように、
現像剤収納室２５と現像室２４間を仕切る規制部材４０
を供給ローラ３１に押し当てて設け、その規制部材４０
で前記現像剤収納室２５からの現像剤が直接現像ローラ
３０に付着することを規制しながら、前記現像剤収納室
２５から前記現像室２４へと現像剤を送り出して前記供
給ローラ３１で前記現像ローラ３０に供給し、その供給
した現像剤を薄層化部材３２で薄層化し、その薄層化し
た現像剤を前記現像ローラ３０で感光体１３に転移して
その感光体１３上の潜像を可視像化する電子写真装置の
現像装置１６において、前記規制部材４０をシート状に
つくり、前記供給ローラ３１への押し当て位置の両端部
位４０ａを、該供給ローラ３１の周面から浮かせてな
る、ことを特徴とする。For this purpose, the present invention has the following features.
Regulator 40 for partitioning between developer storage chamber 25 and developing chamber 24
Is provided by pressing against the supply roller 31, and the regulating member 40
The developer is sent out from the developer storage chamber 25 to the developing chamber 24 while the developer from the developer storage chamber 25 is prevented from directly adhering to the developing roller 30, and the developer is developed by the supply roller 31. The developer is supplied to a roller 30, the supplied developer is thinned by a thinning member 32, and the thinned developer is transferred to the photoconductor 13 by the developing roller 30 to transfer the latent image on the photoconductor 13. In the developing device 16 of the electrophotographic apparatus for visualizing the image, the regulating member 40 is formed in a sheet shape, and both end portions 40 a of the pressing position against the supply roller 31 are floated from the peripheral surface of the supply roller 31. It is characterized by that.
【０００８】請求項２に記載のものは、たとえば以下の
図示実施例に示すように、現像剤収納室２５と現像室２
４間を仕切る規制部材４０を供給ローラ３１に押し当て
て設け、その規制部材４０で前記現像剤収納室２５から
の現像剤が直接現像ローラ３０に付着することを規制し
ながら、前記現像剤収納室２５から前記現像室２４へと
現像剤を送り出して前記供給ローラ３１で前記現像ロー
ラ３０に供給し、その供給した現像剤を薄層化部材３２
で薄層化し、その薄層化した現像剤を前記現像ローラ３
０で感光体１３に転移してその感光体１３上の潜像を可
視像化する電子写真装置の現像装置１６において、前記
規制部材４０をシート状につくり、前記供給ローラ３１
への押し当て位置の両端部位４０ａで、該供給ローラ３
１への押し当て弾性力を弱くしてなる、ことを特徴とす
る。According to a second aspect of the present invention, a developer storage chamber 25 and a developing chamber
A regulating member 40 for partitioning between the four is provided against the supply roller 31, and the regulating member 40 restricts the developer from the developer accommodating chamber 25 from directly adhering to the developing roller 30, and controls the developer storage. The developer is sent out from the chamber 25 to the developing chamber 24 and is supplied to the developing roller 30 by the supply roller 31.
The developer is thinned by the developing roller 3
In the developing device 16 of the electrophotographic apparatus which transfers the latent image on the photosensitive member 13 to a visual image by transferring the regulating member 40 to a sheet shape,
The supply roller 3 at both end portions 40a of the pressing position against
1 is characterized in that the elastic force against pressing is weakened.
【０００９】請求項３に記載のものは、たとえば以下の
図示実施例に示すように、現像剤収納室２５と現像室２
４間を仕切る規制部材４０を供給ローラ３１に押し当て
て設け、その規制部材４０で前記現像剤収納室２５から
の現像剤が直接現像ローラ３０に付着することを規制し
ながら、前記現像剤収納室２５から前記現像室２４へと
現像剤を送り出して前記供給ローラ３１で前記現像ロー
ラ３０に供給し、その供給した現像剤を薄層化部材３２
で薄層化し、その薄層化した現像剤を前記現像ローラ３
０で感光体１３に転移してその感光体１３上の潜像を可
視像化する電子写真装置の現像装置１６において、前記
規制部材４０を毛ブラシ５０でつくり、その先端を前記
供給ローラ３１に押し当ててなる、ことを特徴とする。According to a third aspect of the present invention, a developer storage chamber 25 and a developing chamber
A regulating member 40 for partitioning between the four is provided against the supply roller 31, and the regulating member 40 restricts the developer from the developer accommodating chamber 25 from directly adhering to the developing roller 30, and controls the developer storage. The developer is sent out from the chamber 25 to the developing chamber 24 and is supplied to the developing roller 30 by the supply roller 31.
The developer is thinned by the developing roller 3
In the developing device 16 of the electrophotographic apparatus which transfers the latent image on the photosensitive member 13 to a visible image at 0, the regulating member 40 is formed with a bristle brush 50, and the tip of the regulating member 40 is formed on the supply roller 31. Characterized by being pressed against.
【００１０】[0010]
【作用】そして、駆動時、薄層化部材３２や供給ローラ
３１で掻き落とした現像剤の多くは、現像ローラ３０の
両端部の下側に集まるが、請求項１に記載のものでは、
規制部材４０の両端部位４０ａを供給ローラ３１の周面
から浮かせたことにより、また請求項２および３に記載
のものでは、その両端部位４０ａを撓ませることによ
り、該両端部位４０ａと供給ローラ３１の周面との間を
通って現像剤収納室２５へと戻る。In operation, most of the developer scraped off by the thinning member 32 and the supply roller 31 collects below both ends of the developing roller 30.
The two end portions 40a of the regulating member 40 are lifted from the peripheral surface of the supply roller 31, and the end portions 40a of the regulating member 40 are bent by bending the both end portions 40a. And returns to the developer accommodating chamber 25.
【００１１】[0011]
【実施例】以下、図面を参照しつつ、この発明の実施例
について説明する。図４は、この発明の一実施例である
現像装置を備えるレ−ザプリンタの概略構成図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a schematic configuration diagram of a laser printer including a developing device according to an embodiment of the present invention.
【００１２】図中符号１０は、プリンタ本体、符号１１
は、そのプリンタ本体１０に備える給紙カセットであ
る。しかして、給紙カセット１１から矢印イ方向に送り
出す用紙Ｐは、レジストロ−ラ対１２によってタイミン
グをとってドラム状の感光体１３の下側へと搬送する。
感光体１３は、矢示する時計方向に回転駆動し、その際
帯電装置１４によって表面を一様に帯電し、光書込み装
置１５からのレ−ザ光を照射して感光体１３上に静電潜
像を形成する。この潜像は、この発明による現像装置１
６位置を通るとき現像剤によって可視像化し、この可視
像は、感光体１３の下側へ搬送した用紙Ｐに転写装置１
７により転写し、転写した用紙Ｐ上の可視像は、定着装
置１８によって定着する。そして、定着装置１８を出た
用紙Ｐは、たとえば矢印ロ方向の排紙部１９上に排出す
る。一方、可視像転写後の感光体１３は、クリ−ニング
装置２０によって残留現像剤を除去する。In the drawing, reference numeral 10 denotes a printer main body, and reference numeral 11 denotes a printer.
Is a paper feed cassette provided in the printer main body 10. Thus, the sheet P sent out from the sheet cassette 11 in the direction of arrow A is conveyed to the lower side of the drum-shaped photoconductor 13 by the registration roller pair 12 at appropriate timing.
The photoreceptor 13 is driven to rotate clockwise as indicated by an arrow. At this time, the surface of the photoreceptor 13 is uniformly charged by a charging device 14, and the photoreceptor 13 is irradiated with laser light from Form a latent image. This latent image is developed by the developing device 1 according to the present invention.
When the image passes through the six positions, the image is visualized by the developer, and this visible image is transferred to the sheet P conveyed below the photoconductor 13 by the transfer device 1.
7, the visible image on the paper P transferred is fixed by the fixing device 18. Then, the sheet P that has exited the fixing device 18 is discharged onto a sheet discharge unit 19 in the direction of arrow B, for example. On the other hand, the photosensitive member 13 after the transfer of the visible image removes the residual developer by the cleaning device 20.
【００１３】ところで、上述した現像装置１６は、詳し
くは図１に示すように構成してなる。図中符号２３で現
像ケースを示す。現像ケース２３内には、図中左側の現
像室２４と右側の現像剤収納室２５とを備える。そし
て、現像室２４と現像剤収納室２５間を仕切る規制部材
４０を、現像ケース１の上側から垂下してなる。By the way, the above-mentioned developing device 16 is constructed in detail as shown in FIG. Reference numeral 23 in the drawing indicates a developing case. The developing case 23 includes a developing chamber 24 on the left side and a developer storage chamber 25 on the right side in the drawing. Then, a regulating member 40 that partitions between the developing chamber 24 and the developer accommodating chamber 25 is hung from the upper side of the developing case 1.
【００１４】現像室２４は、感光体１３側に現像窓２６
をあけ、その現像窓２６を上側にして傾けて設ける。そ
して、この現像室２４内に、現像窓２６を介して感光体
１３と対向する現像ローラ３０を備えるとともに、その
図中右斜め下側で現像ローラ３０と接触する供給ローラ
３１を備える。現像ローラ３０は、図示しないが、アル
ミの表面に網目状の誘電層を形成してなる。一方、供給
ローラ３１は、その中心軸３１ａの周りに導電性のポリ
ウレタンスポンジ３１ｂを設けてなる。The developing chamber 24 has a developing window 26 on the photoconductor 13 side.
And the developing window 26 is inclined with the developing window 26 facing upward. The developing chamber 24 includes a developing roller 30 that faces the photoconductor 13 via the developing window 26, and a supply roller 31 that contacts the developing roller 30 at an obliquely lower right side in FIG. Although not shown, the developing roller 30 is formed by forming a mesh-like dielectric layer on the surface of aluminum. On the other hand, the supply roller 31 is provided with a conductive polyurethane sponge 31b around a central axis 31a.
【００１５】また、現像室２４内には、その上側に現像
ローラ３０のローラ軸方向に長いブレード状の薄層化部
材３２を備える。そして、その薄層化部材３２の基端側
を現像ケース２３で支持して先端側を現像ローラ３０の
周面に接触させてなる。In the developing chamber 24, a blade-shaped thinning member 32 which is long in the roller axis direction of the developing roller 30 is provided above the developing chamber 24. Then, the base end side of the thin layer member 32 is supported by the developing case 23 and the front end side is brought into contact with the peripheral surface of the developing roller 30.
【００１６】一方、現像剤収納室２５内には、現像剤を
収納し、その現像剤を撹拌しながら現像室２４に搬送す
る２つのアジテータ３５をそれぞれ回動自在に備える。
なお、左側のアジテータ３５の下側で符号３６で示すも
のは、検知面を現像剤収納室２５内に臨ませた現像剤エ
ンド検知センサである。On the other hand, the developer accommodating chamber 25 is provided with two agitators 35 for accommodating the developer and transporting the developer to the developing chamber 24 while stirring the developer, respectively.
The one indicated by reference numeral 36 below the left agitator 35 is a developer end detection sensor having a detection surface facing the inside of the developer accommodating chamber 25.
【００１７】そして、現像時に、図示省略した駆動モー
タの駆動力を伝達してアジテータ３５を回転駆動し、ま
た現像ローラ３０および供給ローラ３１をそれぞれ図中
矢印Ａ・Ｂ方向に回転駆動する。しかして、現像剤収納
室２５内の現像剤を２つのアジテータ３５で撹拌しなが
ら規制部材４０の下側を通して現像室２４へ送り出す。
そうして、その現像剤を供給ローラ３１で摩擦帯電して
現像ロ−ラ３０に付着し、その付着した現像剤を薄層化
部材３２で所定厚さに薄層化し、その薄層化した現像剤
を現像ロ−ラ３０で感光体１３に静電的に転移してその
感光体１３上の潜像を可視化する。At the time of development, the driving force of a drive motor (not shown) is transmitted to drive the agitator 35 to rotate, and the developing roller 30 and the supply roller 31 are driven to rotate in the directions of arrows AB in FIG. Thus, the developer in the developer storage chamber 25 is sent out to the developing chamber 24 through the lower side of the regulating member 40 while being stirred by the two agitators 35.
Then, the developer is frictionally charged by the supply roller 31 and adheres to the developing roller 30, and the adhered developer is thinned to a predetermined thickness by the thinning member 32, and the thinned layer is formed. The developer is electrostatically transferred to the photoconductor 13 by the development roller 30 to visualize the latent image on the photoconductor 13.
【００１８】ところで、上述した現像装置１６におい
て、規制部材４０は、たとえばポリウレタンでつくり、
図２に示すように、供給ローラ３１の軸方向に長いシー
ト状をなす。そして、その上側部を、図１に示すよう
に、現像ケース２３に接着して下側部を供給ローラ３１
に押し当ててなる。In the developing device 16 described above, the regulating member 40 is made of, for example, polyurethane.
As shown in FIG. 2, the supply roller 31 has a long sheet shape in the axial direction. Then, as shown in FIG. 1, the upper part is adhered to the developing case 23, and the lower part is supplied to the supply roller 31.
It is pressed against.
【００１９】さらに詳しくは、規制部材４０は、図３に
示すように、供給ローラ３１への押し当て位置の両端部
位４０ａを、湾曲して反った形状をなし、供給ローラ３
１の周面から浮かせてなる。そして、この両端部位４０
ａと供給ローラ３１との間に隙間４５を形成してなる。More specifically, as shown in FIG. 3, the restricting member 40 is formed so that both end portions 40a of the pressing position against the supply roller 31 are curved and warped.
1 from the circumference. And, both end portions 40
A gap 45 is formed between a and the supply roller 31.
【００２０】しかして、上述した現像装置１６では、現
像時、現像剤収納室２５からアジテータ３５で現像室２
４へ現像剤を送り出すとき、その現像剤の一部が浮遊し
て供給ローラ３１の上を通り、現像剤収納室２５から直
接現像ローラ３０に付着することを規制部材４０で規制
する。そして、送り出した現像剤が供給ローラ３１で摩
擦帯電されずに現像ローラ３０に供給されることを阻止
する。In the developing device 16 described above, the developing chamber 2 is moved from the developer storage chamber 25 by the agitator 35 during the development.
When the developer is sent to the developing roller 4, the regulating member 40 regulates that a part of the developer floats on the supply roller 31 and adheres directly to the developing roller 30 from the developer accommodating chamber 25. Then, the supplied developer is prevented from being supplied to the developing roller 30 without being triboelectrically charged by the supply roller 31.
【００２１】ところで、現像剤の薄層化の際に、余分の
現像剤は、薄層化部材３２により現像ローラ３０から掻
き落とされる。また、感光体１３に転移せずに現像ロー
ラ３０上に残った現像剤は、供給ローラ３１で掻き落と
される。そして、それら現像剤の多くは、現像ローラ３
０の両端部の下側に集まり、たとえば実施例のような現
像装置１６では、現像室２４の傾斜に従い現像剤収納室
２５へ向けて流れ落ちる。ところが、供給ローラ３１と
規制部材４０の両端部位４０ａとの間には隙間４５があ
るから、それらの現像剤はこの隙間４５を通って現像剤
収納室２５内へと戻る。When the developer is thinned, excess developer is scraped off from the developing roller 30 by the thinning member 32. The developer remaining on the developing roller 30 without being transferred to the photoconductor 13 is scraped off by the supply roller 31. Most of the developer is supplied to the developing roller 3
In the developing device 16 as in the embodiment, for example, it flows down toward the developer accommodating chamber 25 according to the inclination of the developing chamber 24. However, since there is a gap 45 between the supply roller 31 and both end portions 40 a of the regulating member 40, those developers return to the developer storage chamber 25 through the gap 45.
【００２２】さて、上述した図示実施例では、規制部材
４０の両端部位４０ａを供給ローラ３１の周面から浮か
せて、始めから隙間４５を開けていた。しかし、たとえ
ば図５に示すように、シート状の規制部材４０の両端部
位４０ａも供給ローラ３１の周面から浮かせないで押し
当てる一方、その両端部位４０ａでの厚さｔ1を中央部
での厚さｔ2より薄く形成し、これにより、両端部位４
０ａで供給ローラ３１への押し当て弾性力を弱くする構
成としてもよい。In the illustrated embodiment described above, both ends 40a of the regulating member 40 are lifted from the peripheral surface of the supply roller 31, and the gap 45 is opened from the beginning. However, for example, as shown in FIG. 5, while the opposite ends portions 40a of the sheet-like regulating member 40 is also pressed without floated from the peripheral surface of the supply roller 31, the thickness t 1 at both ends site 40a at the central portion It is formed to be thinner than the thickness t 2 , so that both end portions 4
A configuration in which the elastic force of pressing the supply roller 31 at 0a is weakened may be adopted.
【００２３】しかして、この図示実施例では、上述のよ
うに薄層化部材３２などで掻き落とした現像剤が現像ロ
ーラ３０の両端部側から流れ落ちてきたとき、その現像
剤に押されて規制部材４０の両端部位４０ａが点線で示
すように撓み、そのときに供給ローラ３１の周面との間
にできる隙間４５を通して現像剤を現像剤収納室２５内
へと戻す。In the illustrated embodiment, as described above, when the developer scraped off by the thin layer member 32 or the like flows down from both ends of the developing roller 30, it is pushed by the developer and regulated. The two end portions 40 a of the member 40 bend as indicated by dotted lines, and the developer is returned into the developer storage chamber 25 through a gap 45 formed between the member 40 and the peripheral surface of the supply roller 31.
【００２４】また、たとえば図６に示すように、シート
状の規制部材４０の両端部位４０ａでの幅寸法ｄ1を、
中央部での幅寸法ｄ2より長く形成し、図中上側で上述
の現像ケース２３に取り付けたときの両端部位４０ａに
おける腰の強さを中央部より小さくし、これにより、両
端部位４０ａで供給ローラ３１への押し当て弾性力を弱
くすることもできる。As shown in FIG. 6, for example, the width dimension d 1 at both end portions 40a of the sheet-shaped regulating member 40 is
Central longer form than the width d 2 at, the waist strength in both end portions 40a when mounted to the developing case 23 described above in the upper side in FIG smaller than the central portion, thereby, supplied at both ends site 40a The elastic force of pressing against the roller 31 can be reduced.
【００２５】ところで、以上の実施例では、規制部材４
０がシート状であったが、たとえば図７に示すように、
支持部材４９に毛ブラシ５０を取り付けて規制部材４０
を構成することもできる。そして、支持部材４９を介し
て上述の現像ケース２３に取り付けて毛ブラシ５０の先
端を供給ローラ３１に押し当てる構成とする。In the above embodiment, the regulating member 4
Although 0 was a sheet, for example, as shown in FIG.
The bristle brush 50 is attached to the support member 49 and the regulating member 40
Can also be configured. Then, the brush is attached to the developing case 23 via the support member 49 and the tip of the bristle brush 50 is pressed against the supply roller 31.
【００２６】この図示実施例では、上述の薄層化部材３
２などで掻き落とした現像剤が現像ローラ３０の両端部
側から流れ落ちてきたとき、その現像剤に押されて毛ブ
ラシ５０の両端部位５０ａの毛が撓み、そのときに供給
ローラ３１の周面との間にできる隙間を通して現像剤を
現像剤収納室２５内へと戻す。In the illustrated embodiment, the aforementioned thinned member 3
When the developer scraped off by two or the like flows down from both end portions of the developing roller 30, the bristles at both end portions 50a of the bristle brush 50 are pushed by the developer, and the peripheral surface of the supply roller 31 at that time. The developer is returned into the developer storage chamber 25 through a gap created between
【００２７】[0027]
【発明の効果】したがって、この発明によれば、上述し
た規制部材における供給ローラへの押し当て位置の両端
部位を、請求項１に記載のものでは供給ローラの周面か
ら浮かせたことにより、また請求項２および３に記載の
ものでは撓ませることにより、現像時、薄層化部材など
で掻き落とした現像剤の多くをこの両端部位と供給ロー
ラの周面との間を通して現像剤収納室へと戻すことを可
能とし、これにより、現像ローラから掻き落とした現像
剤がその両端部側でそのまま溜ることを防ぎ、その溜っ
た現像剤が原因で画像品質の低下や現像剤の飛散などの
弊害が発生することを防止することができる。Therefore, according to the present invention, both end portions of the restricting member at the pressing position against the supply roller are floated from the peripheral surface of the supply roller in the first aspect. According to the second and third aspects, by bending, a large amount of the developer scraped off by a thin layer member or the like during development passes between the both end portions and the peripheral surface of the supply roller to the developer storage chamber. This prevents the developer scraped off from the developing roller from remaining on both sides of the developing roller, and causes the adverse effects such as deterioration of image quality and scattering of the developer due to the collected developer. Can be prevented from occurring.
【図１】この発明の一実施例である現像装置の断面図で
ある。FIG. 1 is a sectional view of a developing device according to an embodiment of the present invention.
【図２】その現像装置に備える供給ローラと規制部材を
現像ローラ側から見た正面図である。FIG. 2 is a front view of a supply roller and a regulating member provided in the developing device as viewed from a developing roller side.
【図３】その供給ローラと規制部材の平面図である。FIG. 3 is a plan view of the supply roller and a regulating member.
【図４】この現像装置を備えるレーザプリンタの全体概
略構成図である。FIG. 4 is an overall schematic configuration diagram of a laser printer including the developing device.
【図５】この発明の他の実施例である現像装置に備える
供給ローラと規制部材の平面図である。FIG. 5 is a plan view of a supply roller and a regulating member provided in a developing device according to another embodiment of the present invention.
【図６】この発明の別の実施例である現像装置に備える
供給ローラと規制部材の正面図である。FIG. 6 is a front view of a supply roller and a regulating member provided in a developing device according to another embodiment of the present invention.
【図７】この発明のさらに別の実施例である現像装置に
備える供給ローラとブラシ状の規制部材の正面図であ
る。FIG. 7 is a front view of a supply roller and a brush-shaped regulating member provided in a developing device according to still another embodiment of the present invention.
【図８】従来の現像装置の概略断面図である。FIG. 8 is a schematic sectional view of a conventional developing device.
１３ 感光体 １６ 現像装置 ２４ 現像室 ２５ 現像剤収納室 ３０ 現像ローラ ３１ 供給ローラ ３２ 薄層化部材 ４０ 規制部材 ４０ａ 両端部位 ５０ 毛ブラシ Reference Signs List 13 photoconductor 16 developing device 24 developing chamber 25 developer storage chamber 30 developing roller 31 supply roller 32 thinning member 40 regulating member 40a both end portions 50 bristle brush
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−267782（ＪＰ，Ａ) 特開 昭63−213871（ＪＰ，Ａ) 特開 平２−287575（ＪＰ，Ａ) 特開 平４−1675（ＪＰ，Ａ) 特開 昭63−149678（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 15/08 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-267882 (JP, A) JP-A-63-123871 (JP, A) JP-A-2-287575 (JP, A) JP-A-4- 1675 (JP, A) JP-A-63-149678 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G03G 15/08
Claims (3)
材を供給ローラに押し当てて設け、その規制部材で前記
現像剤収納室からの現像剤が直接現像ローラに付着する
ことを規制しながら、前記現像剤収納室から前記現像室
へと現像剤を送り出して前記供給ローラで前記現像ロー
ラに供給し、その供給した現像剤を薄層化部材で薄層化
し、その薄層化した現像剤を前記現像ローラで感光体に
転移してその感光体上の潜像を可視像化する電子写真装
置の現像装置において、前記規制部材をシート状につく
り、前記供給ローラへの押し当て位置の両端部位を、該
供給ローラの周面から浮かせてなる、電子写真装置の現
像装置。A regulating member for partitioning between the developer accommodating chamber and the developing chamber is provided against the supply roller, and the regulating member regulates the developer from the developer accommodating chamber from directly adhering to the developing roller. Meanwhile, the developer is sent out from the developer accommodating chamber to the developing chamber and supplied to the developing roller by the supply roller, and the supplied developer is thinned by a thinning member, and the thinned development is performed. In a developing device of an electrophotographic apparatus for transferring a developer to a photoreceptor with the developing roller to visualize a latent image on the photoreceptor, the regulating member is formed in a sheet shape, and the pressing member is pressed against the supply roller. A developing device for an electrophotographic apparatus, wherein both end portions of the developing device are floated from a peripheral surface of the supply roller.
材を供給ローラに押し当てて設け、その規制部材で前記
現像剤収納室からの現像剤が直接現像ローラに付着する
ことを規制しながら、前記現像剤収納室から前記現像室
へと現像剤を送り出して前記供給ローラで前記現像ロー
ラに供給し、その供給した現像剤を薄層化部材で薄層化
し、その薄層化した現像剤を前記現像ローラで感光体に
転移してその感光体上の潜像を可視像化する電子写真装
置の現像装置において、前記規制部材をシート状につく
り、前記供給ローラへの押し当て位置の両端部位で、該
供給ローラへの押し当て弾性力を弱くしてなる、電子写
真装置の現像装置。2. A regulating member for partitioning between the developer accommodating chamber and the developing chamber is provided against the supply roller, and the regulating member regulates the developer from the developer accommodating chamber from directly adhering to the developing roller. Meanwhile, the developer is sent out from the developer accommodating chamber to the developing chamber and supplied to the developing roller by the supply roller, and the supplied developer is thinned by a thinning member, and the thinned development is performed. In a developing device of an electrophotographic apparatus for transferring a developer to a photoreceptor with the developing roller to visualize a latent image on the photoreceptor, the regulating member is formed in a sheet shape, and the pressing member is pressed against the supply roller. A developing device for an electrophotographic apparatus, wherein the elasticity of pressing against the supply roller is reduced at both end portions of the developing device.
材を供給ローラに押し当てて設け、その規制部材で前記
現像剤収納室からの現像剤が直接現像ローラに付着する
ことを規制しながら、前記現像剤収納室から前記現像室
へと現像剤を送り出して前記供給ローラで前記現像ロー
ラに供給し、その供給した現像剤を薄層化部材で薄層化
し、その薄層化した現像剤を前記現像ローラで感光体に
転移してその感光体上の潜像を可視像化する電子写真装
置の現像装置において、前記規制部材を毛ブラシでつく
り、その先端を前記供給ローラに押し当ててなる、電子
写真装置の現像装置。3. A regulating member for partitioning between the developer accommodating chamber and the developing chamber is provided against the supply roller, and the regulating member regulates the developer from the developer accommodating chamber from directly adhering to the developing roller. Meanwhile, the developer is sent out from the developer accommodating chamber to the developing chamber and supplied to the developing roller by the supply roller, and the supplied developer is thinned by a thinning member, and the thinned development is performed. In a developing device of an electrophotographic apparatus for transferring a developer to a photoreceptor with the developing roller to visualize a latent image on the photoreceptor, the regulating member is formed with a bristle brush, and the tip thereof is pressed against the supply roller. Applied to electrophotographic development devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15416694A JP3212797B2 (en) | 1994-06-13 | 1994-06-13 | Developing device for electrophotographic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15416694A JP3212797B2 (en) | 1994-06-13 | 1994-06-13 | Developing device for electrophotographic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07333969A JPH07333969A (en) | 1995-12-22 |
| JP3212797B2 true JP3212797B2 (en) | 2001-09-25 |
Family
ID=15578279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15416694A Expired - Fee Related JP3212797B2 (en) | 1994-06-13 | 1994-06-13 | Developing device for electrophotographic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3212797B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4935770B2 (en) | 2007-06-29 | 2012-05-23 | ブラザー工業株式会社 | Developing unit, process device, and image forming apparatus |
| JP4363465B2 (en) | 2007-06-29 | 2009-11-11 | ブラザー工業株式会社 | Developing unit, process device, and image forming apparatus |
| US7657209B2 (en) | 2007-09-24 | 2010-02-02 | Hewlett-Packard Development Company, L.P. | Apparatus for containing splashes in an ink developer |
-
1994
- 1994-06-13 JP JP15416694A patent/JP3212797B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07333969A (en) | 1995-12-22 |
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