JPH05281858A - Two-component developing system - Google Patents
Two-component developing systemInfo
- Publication number
- JPH05281858A JPH05281858A JP4103932A JP10393292A JPH05281858A JP H05281858 A JPH05281858 A JP H05281858A JP 4103932 A JP4103932 A JP 4103932A JP 10393292 A JP10393292 A JP 10393292A JP H05281858 A JPH05281858 A JP H05281858A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- magnet roller
- shaft
- drum
- developing unit
- 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
Landscapes
- Common Mechanisms (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
- Gear Transmission (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真プロセスにお
ける、二成分現像システムに関する。FIELD OF THE INVENTION The present invention relates to a two-component development system in an electrophotographic process.
【従来の技術】複写機、プリンタ等に使用される電子写
真プロセスでは、感光体に対向して、マグネットローラ
ー上に磁気ブラシを形成し、この磁気ブラシを感光体表
面に摺動させて顕像化させる。この電子写真プロセスに
は、一般に、図８に示すような、一成分現像方式のもの
と、図９に示すような、二成分現像方式のものがある。
一成分現像方式においては、磁気ブラシは感光体表面に
対してほぼ等速に摺動させるのが最も画質が良く、図８
の如く感光体ドラム１の一端に設けられた歯車とマグネ
ットローラー２の軸に設けられた歯車とを噛み合わせる
ことにより、マグネットローラー２を回転させることが
できる。なお、図８において、符号１Ａはチャージャ
ー、１Ｂはクリーニングブレード、１Ｃはリサイクルス
パイラ、２Ａはトナーカートリッジ、２Ｂはトナー攪拌
スプリング、２Ｃはスポンジローラー、２Ｄは、ドクタ
ーブレードである。2. Description of the Related Art In an electrophotographic process used in copying machines, printers, etc., a magnetic brush is formed on a magnet roller facing a photoconductor, and the magnetic brush is slid on the surface of the photoconductor to visualize an image. Turn into This electrophotographic process generally includes a one-component developing system as shown in FIG. 8 and a two-component developing system as shown in FIG.
In the one-component developing method, it is best to slide the magnetic brush on the surface of the photosensitive member at a substantially constant speed.
As described above, the magnet roller 2 can be rotated by meshing the gear provided on one end of the photosensitive drum 1 with the gear provided on the shaft of the magnet roller 2. In FIG. 8, reference numeral 1A is a charger, 1B is a cleaning blade, 1C is a recycle spiral, 2A is a toner cartridge, 2B is a toner stirring spring, 2C is a sponge roller, and 2D is a doctor blade.
【０００２】また、２成分現像方式においては、磁気ブ
ラシは感光体表面に対しほぼ１．８〜２．２倍の速度で
摺動させるのが最も画質が良いことが知られている。し
かしながら、図８の例で感光体ドラム１側の歯車を大き
くしても、周速比はたかだか１．５倍程度にしか成らな
いため、前記の摺動速度の達成は困難である。そこで、
前記摺動速度の達成のため、２成分現像方式で一般に用
いられている方法は、感光体と現像器を別々の駆動系に
より駆動する方法である。図９の二成分現像ユニットの
具体例７において、感光体ドラム３は、プリンタ本体に
装着された歯車により駆動される。歯車６はマグネット
ローラ６Ａの軸に固定されており、歯車４が前記本体側
の歯車により駆動され、その駆動は歯車５、歯車６と増
速される。図１０は二成分現像方式電子写真プロセス装
置の従来例の本体機構部、図１１は本体にプロセスユニ
ット７を装着した状態を示す。図１０、１１は装置本体
の左側面の図であり、プロセスユニット７は装置右側か
ら装着する。本体の駆動歯車列、プロセスユニットの駆
動歯車列は共に左側に配置されている。マグネットロー
ラ６Ａは、本体の歯車１０が歯車４と噛み合い、歯車
５、６の噛み合いを介して回転駆動される。また、感光
体ドラム３は、歯車１２と軸芯が同一位置に配置され、
歯車１２に設けられたカップリングにより駆動される。
この場合、歯車１２には、前記歯車１０の駆動が歯車１
１を介して減速伝達される。In the two-component developing system, it is known that the image quality is best obtained by sliding the magnetic brush at a speed of about 1.8 to 2.2 times the surface of the photosensitive member. However, even if the gear on the photosensitive drum 1 side is increased in the example of FIG. 8, the peripheral speed ratio is only about 1.5 times, so that it is difficult to achieve the sliding speed. Therefore,
In order to achieve the above-mentioned sliding speed, a method generally used in the two-component developing method is a method in which the photoconductor and the developing device are driven by separate driving systems. In Concrete Example 7 of the two-component developing unit shown in FIG. 9, the photosensitive drum 3 is driven by a gear mounted on the printer body. The gear 6 is fixed to the shaft of the magnet roller 6A, and the gear 4 is driven by the gear on the main body side, and the drive is accelerated by the gear 5 and the gear 6. FIG. 10 shows a main body mechanism section of a conventional example of a two-component developing type electrophotographic process apparatus, and FIG. 11 shows a state in which the process unit 7 is attached to the main body. 10 and 11 are views of the left side surface of the apparatus main body, and the process unit 7 is mounted from the right side of the apparatus. The drive gear train of the main body and the drive gear train of the process unit are both arranged on the left side. The magnet roller 6 </ b> A has a main body gear 10 meshing with the gear 4 and is rotationally driven through the meshing of the gears 5 and 6. Further, the photoconductor drum 3 has the shaft 12 and the shaft center arranged at the same position,
It is driven by a coupling provided on the gear 12.
In this case, the gear 12 is driven by the gear 1 driven by the gear 1.
1 is transmitted via deceleration.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記従
来技術では、感光体ドラム駆動系と現像器（マグネット
ローラー）駆動系が別個に設けられているため、次のよ
うな種々の問題点が生じる。多数の複雑な歯車列が必要
になり、このため、装置を小形化する場合に大きな制約
となり、部品点数が増え信頼性が低下し、コストが上が
る。また、プロセスユニットを本体に装着する際に、感
光体ドラム駆動、現像器駆動の２つを位置決めする必要
があり高い精度を必要とする。本発明は、前記従来の問
題点に鑑みて成されたものであって、少数の簡単な歯車
列で構成できるため、装置を小形化でき、部品点数が減
り、信頼性が上がると共に、位置決めが容易に行える二
成分現像システムを提供することを目的とする。However, in the above-mentioned prior art, since the photosensitive drum drive system and the developing device (magnet roller) drive system are separately provided, the following various problems occur. A large number of complicated gear trains are required, which is a major limitation when downsizing the device, which increases the number of parts, lowers reliability, and increases cost. Further, when the process unit is mounted on the main body, it is necessary to position two of the photosensitive drum drive and the developing device drive, which requires high accuracy. The present invention has been made in view of the above-mentioned conventional problems, and since it can be configured with a small number of simple gear trains, the device can be downsized, the number of parts is reduced, reliability is increased, and positioning is performed. An object is to provide a two-component developing system that can be easily performed.
【０００４】[0004]
【課題を解決するための手段】本発明は、電子写真プロ
セスにおける、二成分現像システムにおいて、現像槽の
マグネットローラー駆動源を、感光体ドラムに軸着され
た歯車から取り、マグネットローラー駆動用歯車列の中
間歯車の回転軸を、マグネットローラーの軸とすること
により、前記課題を解決するものである。According to the present invention, in a two-component developing system in an electrophotographic process, a magnet roller driving source of a developing tank is taken from a gear axially mounted on a photosensitive drum, and a magnet roller driving gear is provided. The problem is solved by using the rotating shaft of the intermediate gear of the row as the shaft of the magnet roller.
【０００５】[0005]
【作用】本発明においては、現像槽のマグネットローラ
ー駆動源を、感光体ドラムに軸着された歯車から取り、
マグネットローラー駆動用歯車列の中間歯車の回転軸
を、マグネットローラーの軸とする。従って、マグネッ
トローラー駆動用歯車列を簡単な歯車列で構成できる。
この為、装置を小型化でき、部品点数が減り信頼性が上
がり、コストが下がる。また、本体との位置決めは感光
体駆動系のみ行えば良いため、コストが下げられる。In the present invention, the magnet roller drive source of the developing tank is obtained from the gear wheel attached to the photosensitive drum,
The rotation shaft of the intermediate gear of the gear train for driving the magnet roller is the shaft of the magnet roller. Therefore, the gear train for driving the magnet roller can be configured by a simple gear train.
Therefore, the device can be downsized, the number of parts is reduced, the reliability is improved, and the cost is reduced. Further, since the positioning with respect to the main body may be performed only by the photoconductor drive system, the cost can be reduced.
【０００６】[0006]
【実施例】以下図面を参照して、本発明の実施例を詳細
に説明する。実施例のプリンタを図１に示す。本プリン
タは、カード、ラベル等の特定用紙に必要な情報を印字
するシステム用のものであって、本体システム内に収納
するため非常に小型に構成する必要があることから、図
１に示すように、本体のフレーム１４、フレーム１５で
構成される狭い範囲に印刷に必要な要素を全て収納して
いる。図１の１３は現像ユニットで、図２に現像ユニッ
ト１３の外観図を示す。本プリンタではトナー容量の制
約から感光体ユニットと現像ユニットを別個に構成し
た。図３は本プリンタの後部の図である。図３に示すよ
うに、メインモータ１６の軸に固定されたプーリー１７
により歯付きベルト１８が駆動され、該ベルト１８によ
り、感光体駆動用プーリー１９が回転駆動される。図４
は感光体ユニットの断面図である。感光体ドラム２２は
ドラムギア２１に接着結合されている。図４の２０はカ
ップリングであり、感光体ユニットを本体に装着する
と、感光体駆動ギアの溝部（図示省楽）と結合されるこ
とにより軸２３、ピン２４、２５によりドラムギア２１
を回転駆動する。図５は現像ユニット１３の駆動状態の
側面を示し、図６は底面を示し、図７は正面を示す。図
５〜図７に示すように、現像ユニット１３を本体に装着
すると、ドラムギア２１がアイドルギア２６と噛み合っ
て感光体ドラム２２の回転が伝達される。２７はマグネ
ットローラであって、アイドルギア２６は中芯部に軸受
け２８が設けられていてマグネットローラ２７の軸２７
Ａを中心として自在に回転する。２９は２段ギアであっ
て、アイドルギア２６の回転を増速してマグネットロー
ラ駆動ギア３０を回転させる。マグネットローラ駆動ギ
ア３０はピン３１によってマグネットローラの軸２７Ａ
に締結されているので、該駆動ギア３０の回転によりマ
グネットローラ２７を回転させる。Embodiments of the present invention will now be described in detail with reference to the drawings. The printer of the embodiment is shown in FIG. This printer is for a system that prints necessary information on a specific sheet such as a card or label, and since it is stored in the main system, it must be constructed in a very small size. In addition, all the elements necessary for printing are housed in a narrow range constituted by the frames 14 and 15 of the main body. Reference numeral 13 in FIG. 1 is a developing unit, and FIG. 2 is an external view of the developing unit 13. In this printer, the photoconductor unit and the developing unit are separately configured due to the limitation of the toner capacity. FIG. 3 is a rear view of the printer. As shown in FIG. 3, a pulley 17 fixed to the shaft of the main motor 16
Drives the toothed belt 18, and the belt 18 drives the photosensitive member driving pulley 19 to rotate. Figure 4
FIG. 3 is a sectional view of a photoconductor unit. The photosensitive drum 22 is adhesively bonded to the drum gear 21. Reference numeral 20 in FIG. 4 denotes a coupling, and when the photoconductor unit is mounted on the main body, the drum unit 21 is coupled by the shaft 23 and the pins 24 and 25 by being coupled with the groove portion (illustrated as a space saving) of the photoconductor drive gear.
To rotate. 5 shows a side surface of the developing unit 13 in a driven state, FIG. 6 shows a bottom surface, and FIG. 7 shows a front surface. As shown in FIGS. 5 to 7, when the developing unit 13 is mounted on the main body, the drum gear 21 meshes with the idle gear 26 and the rotation of the photosensitive drum 22 is transmitted. Reference numeral 27 is a magnet roller, and the idle gear 26 is provided with a bearing 28 in the center portion thereof.
Rotate freely around A. Reference numeral 29 denotes a two-stage gear, which accelerates the rotation of the idle gear 26 to rotate the magnet roller drive gear 30. The magnet roller drive gear 30 is connected to the pin 27 of the magnet roller shaft 27A.
Since the driving gear 30 is rotated, the magnet roller 27 is rotated.
【０００７】ここで、各ギアの歯数は、ドラムギア２２
…５７Ｔ、アイドルギア２６…４２Ｔ、２段ギア２９…
１５／２８Ｔ、マグネットローラ駆動ギア３０…２９Ｔ
である。従って、感光体ドラム２２からマグネットロー
ラー２７までの伝達比は、 （５７／４２）×（４２／１８）×（２８／２９）＝
３．０５７５ となる。また、感光体ドラム２２の外径；５０ｍｍ、マ
グネットローラ２７の外径；３１．４ｍｍであるので、
表面の周速比は、 ３１．４×３．０５７５／５０＝１．９２０ となって、２成分現像方式によって適当な速度比が得ら
れている。以上の説明から明らかなように、実施例で
は、感光体ドラム２２の１端に設けたドラムギア２１か
らの伝達によって、現像ユニット１３のマグネットロー
ラ２７を駆動することができるため、簡単な機構で狭い
スペースに現像ユニットを構成することができる。尚、
実施例では、図１〜図７に示すようなプリンタで本発明
を実施していたが、本発明は、実施例に限定されず、他
の構成の電子写真プロセスでも実施できる。The number of teeth of each gear is the drum gear 22.
... 57T, idle gear 26 ... 42T, two-stage gear 29 ...
15 / 28T, magnet roller drive gear 30 ... 29T
Is. Therefore, the transmission ratio from the photoconductor drum 22 to the magnet roller 27 is (57/42) × (42/18) × (28/29) =
It becomes 3.0575. Since the outer diameter of the photosensitive drum 22 is 50 mm and the outer diameter of the magnet roller 27 is 31.4 mm,
The peripheral speed ratio of the surface is 31.4 × 3.0575 / 50 = 1.920, and an appropriate speed ratio is obtained by the two-component developing method. As is clear from the above description, in the embodiment, the magnet roller 27 of the developing unit 13 can be driven by the transmission from the drum gear 21 provided at one end of the photosensitive drum 22, so that the structure is simple and narrow. A developing unit can be configured in the space. still,
In the embodiment, the present invention is carried out by the printer as shown in FIGS. 1 to 7, but the present invention is not limited to the embodiment and can be carried out by an electrophotographic process having another configuration.
【０００８】[0008]
【発明の効果】以上説明したとおり、本発明によれば、
マグネットローラー駆動用歯車列を簡単な歯車列で構成
できる。この為、装置を小型化でき、部品点数が減り、
信頼性が上がり、コストが下がる。また、本体との位置
決めは感光体駆動系のみ行えば良いため、コストが下げ
られる等の優れた効果が得られる。As described above, according to the present invention,
The gear train for driving the magnet roller can be configured by a simple gear train. Therefore, the device can be downsized, the number of parts can be reduced,
Higher reliability and lower cost. Further, since the positioning with respect to the main body may be performed only by the photoconductor driving system, excellent effects such as cost reduction can be obtained.
【図１】本発明の実施例のプリンタの構成図FIG. 1 is a configuration diagram of a printer according to an embodiment of the present invention.
【図２】図１のプリンタの現像ユニットの構成図2 is a configuration diagram of a developing unit of the printer of FIG.
【図３】図１のプリンタの後部図3 is a rear view of the printer of FIG.
【図４】図１のプリンタの感光体ドラムの断面図FIG. 4 is a sectional view of a photosensitive drum of the printer of FIG.
【図５】図２の現像ユニットの駆動説明図FIG. 5 is an explanatory diagram for driving the developing unit in FIG.
【図６】同じく、説明図[Fig. 6] Similarly, an explanatory diagram
【図７】同じく、説明図[Fig. 7] Similarly, an explanatory diagram
【図８】従来の一成分現像ユニットの説明図FIG. 8 is an explanatory diagram of a conventional one-component developing unit.
【図９】従来の二成分現像ユニットの説明図FIG. 9 is an explanatory diagram of a conventional two-component developing unit.
【図１０】図９の説明図10 is an explanatory diagram of FIG.
【図１１】図９の説明図FIG. 11 is an explanatory diagram of FIG. 9.
１３ 現像ユニット １４、１５ 本体フレーム １６ メインモーター ２０ カップリング ２１ ドラムギア ２２ 感光体ドラム ２６ アイドルギア ２８ 軸受け ２９ 二段ギア ３０ マグネットローラ駆動ギア 13 Developing Units 14 and 15 Main Body Frame 16 Main Motor 20 Coupling 21 Drum Gear 22 Photoreceptor Drum 26 Idle Gear 28 Bearing 29 Two-step Gear 30 Magnet Roller Drive Gear
Claims (1)
ステムにおいて、 現像槽のマグネットローラー駆動源を、感光体ドラムに
軸着された歯車から取り、 マグネットローラー駆動用歯車列の中間歯車の回転軸
を、マグネットローラーの軸とすることを特徴とする二
成分現像システム。1. In a two-component developing system in an electrophotographic process, a magnet roller drive source of a developing tank is taken from a gear axially attached to a photosensitive drum, and a rotary shaft of an intermediate gear of a magnet roller drive gear train is set. , A two-component developing system characterized by using a magnet roller shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4103932A JP2912764B2 (en) | 1992-03-31 | 1992-03-31 | Two-component development system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4103932A JP2912764B2 (en) | 1992-03-31 | 1992-03-31 | Two-component development system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05281858A true JPH05281858A (en) | 1993-10-29 |
| JP2912764B2 JP2912764B2 (en) | 1999-06-28 |
Family
ID=14367214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4103932A Expired - Fee Related JP2912764B2 (en) | 1992-03-31 | 1992-03-31 | Two-component development system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2912764B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3916334A1 (en) * | 1989-05-19 | 1990-11-22 | Niederberger Kg Heinrich | Roller conveyor for goods - has conveyor plate raised and lowered by horizontal operating cylinder, and at least one slide piece |
| JP2005164684A (en) * | 2003-11-28 | 2005-06-23 | Kyocera Mita Corp | Image forming apparatus |
| US7430387B2 (en) | 2005-05-10 | 2008-09-30 | Samsung Electronics Co., Ltd. | Developing unit and electrophotographic image forming apparatus with the same |
-
1992
- 1992-03-31 JP JP4103932A patent/JP2912764B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3916334A1 (en) * | 1989-05-19 | 1990-11-22 | Niederberger Kg Heinrich | Roller conveyor for goods - has conveyor plate raised and lowered by horizontal operating cylinder, and at least one slide piece |
| DE3916334C2 (en) * | 1989-05-19 | 1998-11-19 | Niederberger Kg Heinrich | Overrun device |
| JP2005164684A (en) * | 2003-11-28 | 2005-06-23 | Kyocera Mita Corp | Image forming apparatus |
| US7430387B2 (en) | 2005-05-10 | 2008-09-30 | Samsung Electronics Co., Ltd. | Developing unit and electrophotographic image forming apparatus with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2912764B2 (en) | 1999-06-28 |
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