JPH0215287A - Developing device for single-component toner - Google Patents

Developing device for single-component toner

Info

Publication number
JPH0215287A
JPH0215287A JP16613888A JP16613888A JPH0215287A JP H0215287 A JPH0215287 A JP H0215287A JP 16613888 A JP16613888 A JP 16613888A JP 16613888 A JP16613888 A JP 16613888A JP H0215287 A JPH0215287 A JP H0215287A
Authority
JP
Japan
Prior art keywords
sleeve
toner
blade
carrier
developer
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
Application number
JP16613888A
Other languages
Japanese (ja)
Inventor
Masaaki Hashitomi
橋富 正明
Junichi Tanizaki
淳一 谷崎
Takuo Shimokawa
下川 拓生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16613888A priority Critical patent/JPH0215287A/en
Publication of JPH0215287A publication Critical patent/JPH0215287A/en
Pending legal-status Critical Current

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  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To uniform toner layer pressure to the overall length of a sleeve by arranging a metallic flat thin plate material in the lengthwise direction of the sleeve and fitting elastic members which press both end parts of the thin plate material against the sleeve to both end parts. CONSTITUTION:One spring member 6 each which presses a blade 5 against the sleeve 3 is provided at positions which are symmetrical about the center of the blade 5 and nearby both end parts of the blade 5 and one spring member is provided at the center part, so that the whole blade 5 is pressed against the sleeve 3 with uniform force. The sleeve 3 rotates as shown by an arrow A to carry toner 2 in a developing device housing 1 while the toner sticks on the outer peripheral surface of the sleeve 3; and the toner layer is uniformed into a thin layer by the blade 5 and charged electrostatically by being rubbed against the blade 5 and then the layer is carried to a development area facing a photo-sensitive body 4 to visualize a latent image on the photosensitive body. Consequently, an image having no irregularity in density is obtained to the overall width of the image area.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、現像剤として一成分トナーを用いた複写機、
レーザプリンタ等における静電潜像の現像装置に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a copying machine using a monocomponent toner as a developer;
The present invention relates to an electrostatic latent image developing device in a laser printer or the like.

従来の技術 一般に静電潜像の現象に於いては、トナーとキャリアと
からなる二成分現像剤を用いて現像を行う方法と、キャ
リアを使用せずトナーのみからなる一成分現像剤を用い
た現像方法とがある。
Conventional technology In general, regarding the phenomenon of electrostatic latent images, there are two methods: one is to develop using a two-component developer consisting of toner and a carrier, and the other is to use a one-component developer consisting only of toner without using carrier. There is a developing method.

二成分現像方式は、トナーとキャリアの混合比、即ちト
ナー濃度を常に適正な値に維持するためにトナー濃度制
御装置が必要となり、このトナー濃度制御装置は非常に
高価であり、かつその装置の調整作業も必要であり、ま
た保守点検等も煩雑なものであった。そこで、近年この
ような点に鑑みて高価なトナー濃度制御装置が不要で、
がっメンテナンス不要の現像方式が注目されてきた。
The two-component development method requires a toner concentration control device in order to always maintain the toner and carrier mixing ratio, that is, the toner concentration, at an appropriate value, and this toner concentration control device is very expensive and requires Adjustment work was also necessary, and maintenance and inspections were also complicated. Therefore, in recent years, in view of this point, an expensive toner concentration control device is no longer necessary.
Development methods that require no maintenance have been attracting attention.

このような要求を満たす現像方式として、キャリアを使
用せずトナーのみからなる現像剤を使用する一成分現像
方式がある。この−成分現像方式には導電性金属より形
成されたトナー担持体上に一成分非磁性トナー層を形成
し、摩擦帯電部材によって前記トナーを所定の極性に摩
擦帯電させ、トナー層の厚さよりも静電潜像担持体とト
ナー担持体との間隙を大きくし、静電潜像担持体とトナ
ー担持体との間に電圧を印加し発生ずるクーロン力によ
り、静電潜像担持体にトナーを飛翔させ静電潜像の現像
を行う第1の方法(電子写真学会誌第26巻第2号(1
987)) 、磁石ローラを内包する導電性金属製トナ
ー担持体上に導電性の一成分磁性トナーからなる磁気ブ
ラシを形成させ、静電潜像担持体上をその磁気ブラシに
より摺擦することにより静電潜像を現像する第2の方法
(USP3,909.258)、磁石ローラを内包する
導電性金属製トナー担持体上に電気的に絶縁性を呈する
一成分磁性トナーからなる薄層を形成させ、静電潜像担
持体と前記)・ナー担持体の間隙をトナー層より大きく
すると共に、静電潜像担持体と前記トナー担持体の間に
交流電圧を印加することによりトナーを静電潜像担持体
と前記トナー担持体間を往復運動させることにより、静
電潜像を現像する第3の方法(特開昭55−18659
号)、トナー担持体が静電潜像担持体と隣接して配置さ
れ、前記トナー担持体が導電性支持体とこの支持体に対
して電気的に絶縁状態にあり、かつ互いに電気的に絶縁
状態にある複数の微小電極を含むものであり、前記トナ
ー担持体上のi・ナーを摩擦帯電部材により、所定の極
性に摩擦帯電し、前記導電性支持体と静電潜像担持体の
背面電極に一定電圧を印加することにより、静電潜像を
現像する第4の方法(特開昭57−114163号)等
が一般によく知られている。
As a developing method that satisfies such requirements, there is a one-component developing method that uses a developer made only of toner without using a carrier. In this -component development method, a one-component non-magnetic toner layer is formed on a toner carrier made of a conductive metal, and the toner is triboelectrically charged to a predetermined polarity by a triboelectric charging member. The gap between the electrostatic latent image carrier and the toner carrier is increased, and a voltage is applied between the electrostatic latent image carrier and the toner carrier. Coulomb force is generated, and the toner is transferred to the electrostatic latent image carrier. The first method of developing an electrostatic latent image by flying it (Journal of Electrophotography Society Vol. 26 No. 2 (1)
987)), by forming a magnetic brush made of conductive one-component magnetic toner on a conductive metal toner carrier containing a magnetic roller, and rubbing the electrostatic latent image carrier with the magnetic brush. A second method for developing electrostatic latent images (USP 3,909.258) involves forming a thin layer of electrically insulating monocomponent magnetic toner on a conductive metal toner carrier containing a magnetic roller. The gap between the electrostatic latent image carrier and the toner carrier described above is made larger than the toner layer, and an alternating current voltage is applied between the electrostatic latent image carrier and the toner carrier to electrostatically transfer the toner. A third method of developing an electrostatic latent image by reciprocating the latent image carrier and the toner carrier (Japanese Patent Laid-Open No. 55-18659)
No.), a toner carrier is disposed adjacent to an electrostatic latent image carrier, and the toner carrier is electrically insulated from the conductive support and this support, and is electrically insulated from each other. The i-toner on the toner carrier is tribo-electrified to a predetermined polarity by a tribo-charging member, and the i-toner on the toner carrier is tribo-electrified to a predetermined polarity. A fourth method (Japanese Unexamined Patent Publication No. 114163/1983) in which an electrostatic latent image is developed by applying a constant voltage to an electrode is generally well known.

ところて、トナー担持体上にトナーの薄層を形成させる
ものとして第4図〜第6図に示しているようなものがあ
った。第4図に於いて、1は現像装置ハウシングで、2
は一成分トナー、3は回転可能に軸支されたスリーブで
あり、10は前記トナー2をスリーブ3に供給し薄層化
する現像剤層厚規制部材(プレート)であり、−船釣に
ブレード10は金属または硬質ゴムやプラスチック等が
使われており、スリーブ3に対して圧接させられるよう
に設定されている。また、第5図に於いて、スリーブ3
に当接する部分にゴムまたはプラスデック製の現像剤層
厚規制部材(ブレード)11を取り付けた金属製の薄板
はね12にて、前記ブレード11をスリーブ3へ圧接す
るように設定されている。
By the way, there are devices as shown in FIGS. 4 to 6 that form a thin layer of toner on a toner carrier. In Figure 4, 1 is the developing device housing, 2
3 is a single-component toner, 3 is a rotatably supported sleeve, 10 is a developer layer thickness regulating member (plate) that supplies the toner 2 to the sleeve 3 and thins it; 10 is made of metal, hard rubber, plastic, or the like, and is set so as to be brought into pressure contact with the sleeve 3. Also, in Figure 5, sleeve 3
The blade 11 is pressed against the sleeve 3 by a metal thin plate spring 12 to which a developer layer thickness regulating member (blade) 11 made of rubber or plastic deck is attached.

また、第6図に於いて、13はスリーブ3の内側に埋め
込まれた磁石で、感光体の画像形成幅に亙って伸長して
いる。15は棒状の磁石であり、薄板状の磁石支持部材
14に接着剤等で固定されている。また、第6図のもの
はスリーブ3の内側の磁石13と棒状磁石15によって
、現像剤の層厚を均一にしようというものである。
Further, in FIG. 6, a magnet 13 is embedded inside the sleeve 3 and extends over the image forming width of the photoreceptor. Reference numeral 15 denotes a rod-shaped magnet, which is fixed to the thin plate-shaped magnet support member 14 with an adhesive or the like. In addition, the one shown in FIG. 6 is intended to make the layer thickness of the developer uniform by using a magnet 13 and a bar magnet 15 inside the sleeve 3.

発明が解決しようとする課題 以上のようなものにあって第4図第5図に示される形式
のものでは、スリーブ3の全長に亙ってトナー層厚を均
一にすることは困難であった。つまり、ブレード10.
11の両端部に於いては圧接力が不足するため、両端部
のトナー層が厚(なってしまい、画像に濃度ムラが発生
する原因となっていた。また、第6図に示すものでは棒
状磁石15が必要であり、高価になり、また磁性トナー
の場合にはトナーがその棒状磁石に吸引され付着すると
いう欠点があった。
Problems to be Solved by the Invention In the types shown in FIGS. 4 and 5, it was difficult to make the toner layer thickness uniform over the entire length of the sleeve 3. . That is, blade 10.
11, the pressure contact force was insufficient at both ends, resulting in a thick toner layer at both ends, causing density unevenness in the image. The magnet 15 is required and is expensive, and in the case of magnetic toner, there is a drawback that the toner is attracted to and adheres to the bar-shaped magnet.

そこで、本発明は簡単な構成でスリーブの全長に亙って
トナー層厚を均一にできるようにしだものである。
Therefore, the present invention has been developed to make it possible to make the toner layer thickness uniform over the entire length of the sleeve with a simple structure.

課題を解決するための手段 上記問題点を解決するため本発明の一成分トナー用現像
装置は金属製の平坦な薄板材をスリーブの長平方向に平
行に配置すると共に前記薄板材の両端部にこの部分をス
リーブ側に押し付ける弾発部材を取り(=jけてなる。
Means for Solving the Problems In order to solve the above-mentioned problems, a developing device for one-component toner according to the present invention includes a flat thin metal plate arranged parallel to the longitudinal direction of the sleeve, and two flat metal plates arranged at both ends of the thin plate. Take the resilient member that presses the part against the sleeve (=j).

作  用 この技術的手段による作用は次のようになる。For production The effect of this technical means is as follows.

すなわち、薄板材の両端部にて不足していた、スリーブ
との圧接力が上記弾発部材にて補われる。
That is, the elastic member compensates for the insufficient pressure contact force with the sleeve at both ends of the thin plate material.

実施例 以下、本発明の一実施例を図面に基づいて説明する。第
1図に於いて、1は現像装置ハウジング、2は一成分現
像剤(トナー)、3は回転可能に軸支されたスリーブ、
4は感光体、5は金属製薄板(図に示しているものは強
度を上げる為に曲げ加工を施しである)よりなる現像剤
層厚規制部材(ブレード)である。6は前記ブレード5
をスリーブ3に押え付けるばね部材であり、第2図て示
すようにブレード5の中央に対して対象位置てしかも、
プレート5の両端部近傍の位置に夫々1つ、また中央部
に1つ設けられており、ブレード5の全体がほぼ均一な
力でスリーブに押え付けられるように前記両端部に配置
されたばね部材と中央部に配置されたばね部材との弾発
力が調整されている。ここで動作を説明すると、スリー
ブ3が矢印Aの方向へ回転する事により、現像装置ハウ
ジング1内のトナー2は、スリーブ3の外周面に付着し
て運ばれ、プレート5によってトナー層厚は均一に薄層
化されると共にブレード5との摺擦によって帯電され、
その後、感光体4と対向している現像領域へ運ばれ、そ
こで感光体上の潜像を顕像化する。この結果、画像領域
の全幅に亙って濃度ムラのない画像が得られるようにな
る。
EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, 1 is a developing device housing, 2 is a one-component developer (toner), 3 is a rotatably supported sleeve,
4 is a photoreceptor, and 5 is a developer layer thickness regulating member (blade) made of a thin metal plate (the one shown in the figure is bent to increase its strength). 6 is the blade 5
It is a spring member that presses the sleeve 3 against the sleeve 3, and as shown in FIG.
One spring member is provided near each end of the plate 5, and one is provided in the center, and the spring member is arranged at both ends so that the entire blade 5 is pressed against the sleeve with a substantially uniform force. The elastic force with the spring member placed in the center is adjusted. To explain the operation here, as the sleeve 3 rotates in the direction of arrow A, the toner 2 in the developing device housing 1 is carried while adhering to the outer peripheral surface of the sleeve 3, and the plate 5 makes the toner layer uniform in thickness. It is made into a thin layer and charged by rubbing against the blade 5,
Thereafter, it is transported to a developing area facing the photoreceptor 4, where the latent image on the photoreceptor is visualized. As a result, an image without density unevenness can be obtained over the entire width of the image area.

第3図は他の実施例を示しており、この実施例ではプレ
ート5の一端をスリーブ3と反対側へ曲げ、その曲げた
端面の少なくとも両端部にばね部材を付設して、プレー
ト5゛をスリーブ3に押え付ける構成となっており、こ
の構成はプレート5の板厚が特に薄い場合に有効である
FIG. 3 shows another embodiment, in which one end of the plate 5 is bent toward the side opposite to the sleeve 3, and spring members are attached to at least both ends of the bent end surface, so that the plate 5 is bent. It is configured to be pressed against the sleeve 3, and this configuration is effective when the plate 5 is particularly thin.

発明の効果 以上のように、本発明によれば一成分トナーを用いた現
像装置に於いて、現像剤層厚規制部材(プレート)の長
手方向の両端部に、この部分をスリーブ側へ押し付ける
弾発部材を取り付けたことにより、この弾発部材の弾発
力によって、ブレードの上記両端部で不足していたスリ
ーブとの圧接力を補うことができるため、現像領域に運
ばれるスリーブ上のトナー層厚は全体が均一となり、得
られる画像も濃度ムラのない高品位のものとなる。更に
、以」二のように簡単な構成であり、易い費用で高画質
な画像を得られるという効果も奏する。
Effects of the Invention As described above, according to the present invention, in a developing device using one-component toner, elastics are provided at both ends of the developer layer thickness regulating member (plate) in the longitudinal direction to press these portions toward the sleeve side. By attaching the spring member, the elastic force of this spring member can compensate for the insufficient pressure contact force with the sleeve at both ends of the blade, so that the toner layer on the sleeve that is carried to the developing area is The thickness is uniform throughout, and the resulting image is of high quality with no density unevenness. Furthermore, as described below, it has a simple configuration and has the advantage of being able to obtain high-quality images at low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例の現像装置の断面図であり、
第2図は第1図のc−c断面を示す。第3図は本発明の
他の実施例を示す断面図である。 第4図、第5図、第6図は従来の現像装置の断面図であ
る。 1・・・・現像装置ハウジング 3・・・・スリーブ 4・・・・感光体 5・・・・現像剤層厚規制部材(プレート)6・・・・
ばね部材 10.11・・・・現像剤層厚規制部材(プレート)1
2・・・・薄板はね 13・・・・磁石 14・・・・磁石支持部材 15・・・・棒状磁石
FIG. 1 is a sectional view of a developing device according to an embodiment of the present invention.
FIG. 2 shows a cc cross section of FIG. 1. FIG. 3 is a sectional view showing another embodiment of the present invention. FIG. 4, FIG. 5, and FIG. 6 are cross-sectional views of a conventional developing device. 1...Developing device housing 3...Sleeve 4...Photoreceptor 5...Developer layer thickness regulating member (plate) 6...
Spring member 10.11...Developer layer thickness regulating member (plate) 1
2... Thin plate spring 13... Magnet 14... Magnet support member 15... Bar-shaped magnet

Claims (1)

【特許請求の範囲】[Claims] 像担持体に対向して配置され、表面に一成分トナーより
成る現像剤を担持可能でしかも回転可能な現像剤担持体
と、この現像剤担持体に現像剤を供給する現像剤供給手
段と、現像剤担持体にその平滑面を当接した金属製の薄
板材と、その薄板材の長手方向両端部を前記現像剤担持
体に押し付ける方向へ力を与えるばね部材を備えたこと
を特徴とする一成分トナー用現像装置。
a developer carrier disposed opposite to the image carrier, capable of carrying a developer made of one-component toner on its surface and rotatable; and a developer supply means for supplying the developer to the developer carrier. The present invention is characterized by comprising a thin metal plate whose smooth surface is in contact with the developer carrier, and a spring member that applies force in a direction to press both ends of the thin plate in the longitudinal direction against the developer carrier. Developing device for single-component toner.
JP16613888A 1988-07-04 1988-07-04 Developing device for single-component toner Pending JPH0215287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16613888A JPH0215287A (en) 1988-07-04 1988-07-04 Developing device for single-component toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16613888A JPH0215287A (en) 1988-07-04 1988-07-04 Developing device for single-component toner

Publications (1)

Publication Number Publication Date
JPH0215287A true JPH0215287A (en) 1990-01-18

Family

ID=15825744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16613888A Pending JPH0215287A (en) 1988-07-04 1988-07-04 Developing device for single-component toner

Country Status (1)

Country Link
JP (1) JPH0215287A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0511586A (en) * 1991-07-04 1993-01-22 Nec Corp Developing device
EP0691587A1 (en) * 1994-07-07 1996-01-10 Mita Industrial Co., Ltd. Apparatus for developing electrostatic latent images
FR2782947A1 (en) * 1998-09-09 2000-03-10 Sagem LASER PRINTING DEVICE WITH SERPENTINE REGULATING BLADE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0511586A (en) * 1991-07-04 1993-01-22 Nec Corp Developing device
EP0691587A1 (en) * 1994-07-07 1996-01-10 Mita Industrial Co., Ltd. Apparatus for developing electrostatic latent images
EP0856779A1 (en) * 1994-07-07 1998-08-05 Mita Industrial Co. Ltd. Apparatus for developing electrostatic latent images
FR2782947A1 (en) * 1998-09-09 2000-03-10 Sagem LASER PRINTING DEVICE WITH SERPENTINE REGULATING BLADE
EP0985982A1 (en) * 1998-09-09 2000-03-15 Sagem S.A. Laser printing device comprising a spiral regulating blade

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