JPS6052875A - Device for preventing stains of scanning optical system of electrophotographic printer - Google Patents
Device for preventing stains of scanning optical system of electrophotographic printerInfo
- Publication number
- JPS6052875A JPS6052875A JP16070983A JP16070983A JPS6052875A JP S6052875 A JPS6052875 A JP S6052875A JP 16070983 A JP16070983 A JP 16070983A JP 16070983 A JP16070983 A JP 16070983A JP S6052875 A JPS6052875 A JP S6052875A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- scanning optical
- light beam
- electrophotographic printer
- cylindrical glass
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/32—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head
- G03G15/326—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by application of light, e.g. using a LED array
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors
- G03G15/04045—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers
- G03G15/04072—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers by laser
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は密封された走査光学系のウィンドウ部の汚れに
よる露光量の低下を防ぐように、ウィンドウ部に用いら
れるガラスを円筒状にし、これを一定速度で回転させな
がらその表面にクリーニング材を圧接し、常時これを清
拭状態に保つようにした電子写真式プリンター（ファク
シミリ、コ／ピ、−夕の演算結果又は記憶内容の表示装
置等）の走査光学系用汚れ防止装置に関する。Detailed Description of the Invention [Technical Field] The present invention aims to prevent the exposure dose from decreasing due to contamination of the window of a sealed scanning optical system. Scanning of an electrophotographic printer (facsimile, copy/copy, display device for displaying calculation results or stored contents, etc.) whose surface is kept in a clean condition by pressing a cleaning material onto its surface while rotating it. This invention relates to a contamination prevention device for optical systems.
第１図はｖｅ来の電子写真式プリンターの主要部の構成
を示し、ｌは矢印方向に一定速度で回転する感光体ドラ
ム、２はその表面に電荷を供給し、これを帯電させる帯
電器、３は後述のレーザー光＃（レーザー・ビーム）に
よシ靜電潜像が形成される露光部分、４は前記潜像を可
視像化する現像機、また５は前記可視像を用紙６の表面
に転写する転写コ四ト四ン、７は転写直後の用紙を感光
体ドラム１よシ剥離する剥離帯電器、８は最後に感光体
ドラムｌの表面を清掃するクリーナーである。９は走査
用のレーザー光学系で、入力信号（ファクシミリ信号、
コンピュータ出力等）によりその出力強度を変調される
レーザー発振器１０と、レーザー光線を集光し、感光体
ドラムｌの表面上の露光部分３に結像させるレンズ糸１
１と、ミラー１３ａ。FIG. 1 shows the configuration of the main parts of a conventional electrophotographic printer, in which l is a photosensitive drum that rotates at a constant speed in the direction of the arrow, 2 is a charger that supplies electric charge to the surface of the drum, and charges it. 3 is an exposed portion where a latent latent image is formed by laser light # (laser beam), which will be described later; 4 is a developing machine that visualizes the latent image; and 5 is a developing device that converts the visible image onto a sheet of paper 6. A transfer roller 7 transfers the image onto the surface, a peeling charger 7 peels off the paper from the photoreceptor drum 1 immediately after the transfer, and a cleaner 8 finally cleans the surface of the photoreceptor drum 1. 9 is a laser optical system for scanning, which receives input signals (facsimile signals,
a laser oscillator 10 whose output intensity is modulated by a computer output, etc.); and a lens thread 1 that focuses the laser beam and forms an image on the exposed portion 3 on the surface of the photoreceptor drum l.
1 and mirror 13a.
１３ｂにより誘導された入射光を反射し、露光部分３を
走査する回転多面＠１２と、レーザー光学系９のウィン
ドウ部で透明な板ガラス１４で構成されている。It consists of a rotating polygon @ 12 that reflects the incident light guided by the laser beam 13b and scans the exposed portion 3, and a transparent plate glass 14 in the window portion of the laser optical system 9.
以上の構成において、レーザー光線は感光体ドラムｌの
表面上の露光部分３に極めて小さなスポットを形成する
と共に、その強度は前述した通９人力信号により変調さ
れ、ｔｆＣ回転多面鏡１２（正ｎ角形の形状を有する）
が１ ／ ｎ回転するごとに露光部分３の全＋＋ｇ を
感光体ドラム１の回転方向と直角の方向に走査する。ま
た回転多面鏡の回転速度及び回転位相は入力信号の垂直
同期信号と完全に同期しているかり、感光体ドラム１の
回転と共に入力信号の変調内容は感光体ドラム１の表面
上に静電潜像として再現される。この静電潜像は現像機
４により可視像化され、転写コロトロン５により用紙６
に転写され、用紙６は剥離帯電器７によシ感光体ドラム
１より剥離され、定着器（図示せず）により転写内容を
定着された後、排出される。In the above configuration, the laser beam forms an extremely small spot on the exposed portion 3 on the surface of the photoreceptor drum l, and its intensity is modulated by the above-mentioned human input signal. shape)
The entire ++g of the exposed portion 3 is scanned in a direction perpendicular to the rotational direction of the photosensitive drum 1 every 1/n rotation of the photosensitive drum 1. Furthermore, the rotational speed and rotational phase of the rotating polygon mirror are completely synchronized with the vertical synchronization signal of the input signal, so that as the photoreceptor drum 1 rotates, the modulation content of the input signal is transferred to the electrostatic potential on the surface of the photoreceptor drum 1. reproduced as a statue. This electrostatic latent image is visualized by a developing device 4, and transferred to a paper 6 by a transfer corotron 5.
The paper 6 is peeled off from the photosensitive drum 1 by a peeling charger 7, and after the transferred content is fixed by a fixing device (not shown), it is discharged.
ここでウィンドウ部１４は、外部から走査光学系９への
塵埃の侵入を防いでミラー１３ａ 。Here, the window portion 14 prevents dust from entering the scanning optical system 9 from the outside and closes the mirror 13a.
１３ｂ１回転多面鏡１２、レンズ１１及びレーザー発掘
器１０の汚損を防止し、こ才しら各素子の動作の安定を
確保する上において重要な役割を果すものである。13b1 plays an important role in preventing contamination of the rotating polygon mirror 12, lens 11, and laser excavator 10 and ensuring stable operation of each element.
第１図のウィ、／ドウ部１４は板ガラスで構成されてい
るため、この部分への塵埃の耐着は不可避であシ、従、
って、露光量が低下し、又はプリント濃度の不均一等を
生じていた。その対策としてウィンドウ部１４にワイパ
ーのような清拭装置を取シ附ける方法も考えられるが、
装置作動中はこれを通過するレーザー光線の妨げとなる
ことは明らかでちる。Since the window/dough section 14 in FIG. 1 is made of plate glass, it is inevitable that dust will adhere to this section.
As a result, the exposure amount decreases or print density becomes non-uniform. As a countermeasure, a method of attaching a wiping device such as a wiper to the window portion 14 may be considered.
Obviously, when the device is in operation, it will obstruct the laser beam passing through it.
本発明は上記に鑑みてなされたものであり、通過光に対
して何等の影響を与えることなく、常時走査光学系のウ
ィンドウ部表面を清拭状態に保ち、安定な露光量を確保
するように、ウィンドウ部を円筒状の板ガラスで構成し
てその側面部に清拭部材を圧接させ、連続的又は間歇的
に円筒状ガラスを回転させるよ１．うにした電子写真式
プリンターの走査光学系用汚れ防止装置を提供するもの
である。The present invention has been made in view of the above, and has an object to constantly keep the window surface of the scanning optical system in a clean state without affecting the passing light in any way, thereby ensuring a stable amount of exposure. 1. The window portion is made of a cylindrical glass plate, a wiping member is pressed against the side surface of the window portion, and the cylindrical glass is rotated continuously or intermittently. The present invention provides a dirt prevention device for a scanning optical system of an electrophotographic printer.
以下、本発明の電子写真式プリンターの走査光学系用汚
れ防止装置について詳細に説明する。Hereinafter, the stain prevention device for the scanning optical system of an electrophotographic printer according to the present invention will be described in detail.
第２図は本発明の一実施例を示し、１〜１３ｍ＃１３ｂ
の意義及び内容については第１図に示したものと変りな
く、１５〜２０が本発明に係る部分である。１５は透明
な円筒状ガラスでその両端に取シ附けられた回転軸１６
は軸受け（図示せず）により支持されベルト１７により
伝達されるモーター１８の駆動力によ〕一定速度で回転
する・１８は円筒状ガラス１５の側面にスプリング１９
により圧接された清拭部材である。Figure 2 shows an embodiment of the present invention, 1-13m #13b
The meaning and content of the symbols are the same as those shown in FIG. 1, and 15 to 20 are the parts related to the present invention. 15 is a transparent cylindrical glass with rotating shafts 16 attached to both ends thereof.
is supported by a bearing (not shown) and rotates at a constant speed by the driving force of a motor 18 transmitted by a belt 17.
This is a wiping member that is pressed into contact with the wiping member.
また、第３図は、つ′インド９部の部分を拡大して図示
し友もので、２１は円筒状ガラス１５に摺接してこれを
連続的に保持する保持部材、２２はレーザー光学系９の
筐体の一部である。In addition, FIG. 3 shows an enlarged view of the cylindrical glass section 9, in which reference numeral 21 is a holding member that slides on and continuously holds the cylindrical glass 15, and 22 is a laser optical system 9. It is part of the casing.
以上の構成において、円筒ガラス１５は一定速度で回転
し、その表面には清拭部材２０が圧接されているので、
常に清拭状態に保たれる。In the above configuration, the cylindrical glass 15 rotates at a constant speed, and the wiping member 20 is pressed against the surface of the cylindrical glass 15.
Always kept clean.
また保持部材２１は外部からレーザー光学系９に塵埃が
侵入することを防止すると共に、円筒状ガラス１５ｔ一
連続的に支持して、撓みの発生を防止する。レーザー光
線は円筒状ガラス１５の中心軸附近を通過して感光体ド
ラム１０表面の露光部分３に入射するが、円筒側面に位
置する清拭部材２０は、レーザー光線に対し、何等妨げ
にはならない。Further, the holding member 21 prevents dust from entering the laser optical system 9 from the outside, and also continuously supports the cylindrical glass 15t to prevent the occurrence of deflection. The laser beam passes near the central axis of the cylindrical glass 15 and enters the exposed portion 3 on the surface of the photoreceptor drum 10, but the wiping member 20 located on the side of the cylinder does not interfere with the laser beam in any way.
なお、円筒状ガラス１５は必しも連続的に回転させる必
要はなく、汚損の状況を勘案し、間歇的にこれを回転さ
せてもよい。Note that the cylindrical glass 15 does not necessarily need to be rotated continuously, but may be rotated intermittently in consideration of the staining situation.
以上、説明した通り、本発明の電子写に式プリンターの
走査光学系汚れ防止装置によれば、ウィンドウ部を一足
速度で連続的又は間歇的に回転する円筒状ガラスで構成
し、その側面部に１清拭部材を圧接するようにしたため
、円筒状ガラスの表面（光学系のウィンドウ部）は常に
清拭状態に保たれ、常に安定した露光前が得られ、プリ
ント結果に不均一が朱子るおそれも解消する。As explained above, according to the scanning optical system contamination prevention device for an electrophotographic printer of the present invention, the window portion is composed of a cylindrical glass that rotates continuously or intermittently at one foot speed, and the side portion 1. Because the cleaning member is in pressure contact, the surface of the cylindrical glass (window part of the optical system) is always kept in a clean state, and a stable pre-exposure condition can always be obtained, which may cause uneven print results. will also be resolved.
第１図・・・従来の電子写真式プリンターの主要部を示
す説明図。第２図・・・本発明の一実施例を示す説明図
。第３図・・・第２図のウィンドウ部を拡大して説明す
る図。
符号の説明
１・・・感光体ドラム、 ２・・・帯電器、 ３・・・
露光部分、 ４・・・現像機、５・・・転写コロトロン
、６・・・用紙、 ７・・・剥離帯電器、８・・・クリ
ーナ、９・・・レーザー光学系、１０・・・レーザー発
振器、１１・・・レンズ、１２・・・回転多面鏡、１３
ａ。
１３ｂ・・・ミラー、１４・・・つ、イントウ部、１５
・・・円筒状ガラス、１６・・・回転軸、１７・・・ベ
ルト、１８・・・モーター、１９・・・スフリング、
２０・・・清拭部材、 ２１・・・保持部材、２２・・
・レーザー光学系筐体の一部。
特許出願人 ４′士ゼロックス株式会社代理人 弁理士
松 原 伸 ２
同 弁理士 村 木 清 司
同 弁理士 平 １） 忠 雄
同 弁理士 上 島 淳 −
同 弁理士 鈴 木 均
第１図
第２図FIG. 1: An explanatory diagram showing the main parts of a conventional electrophotographic printer. FIG. 2: An explanatory diagram showing an embodiment of the present invention. FIG. 3: A diagram illustrating an enlarged view of the window portion of FIG. 2. Explanation of symbols 1... Photosensitive drum, 2... Charger, 3...
Exposure part, 4...Developer, 5...Transfer corotron, 6...Paper, 7...Peeling charger, 8...Cleaner, 9...Laser optical system, 10...Laser Oscillator, 11... Lens, 12... Rotating polygon mirror, 13
a. 13b...Mirror, 14...One, Into part, 15
... Cylindrical glass, 16... Rotating shaft, 17... Belt, 18... Motor, 19... Spring,
20... wiping member, 21... holding member, 22...
・Part of the laser optical system housing. Patent Applicant: 4' Agent for Xerox Co., Ltd. Patent Attorney Shin Matsubara 2 Patent Attorney Kiyoshi Muraki Patent Attorney Taira 1) Yudo Tadashi Patent Attorney Atsushi Ueshima - Patent Attorney Hitoshi Suzuki Figure 1, Figure 2 figure
Claims (1)
記光ビームによって露光される感光体ドラムを備えた電
子写真式プリンターにおいて、 前記走査光学系が、前記光ビームを出力する光ビーム発
生手段と、核光ビームを通すビーム透過部を有して前記
光ビーム発生手段を収容する筐体とから構成され、 前記ビーム透過部が、回転的に支持されて前記光ビーム
を通す円筒状光透過部材と、該光透過部材の表面に圧接
する清拭部材とから構成されることを特徴とする電子写
真式プリンターの走査光学系用汚れ防止装置。[Scope of Claims] An electrophotographic printer including a scanning optical system that outputs a light beam according to recorded information, and a photoreceptor drum that is exposed to the light beam, wherein the scanning optical system outputs the light beam. It is composed of a light beam generating means for outputting the light beam, and a housing having a beam transmitting section for passing the nuclear light beam and accommodating the light beam generating means, the beam transmitting section being rotatably supported to transmit the light beam. 1. A stain prevention device for a scanning optical system of an electrophotographic printer, comprising a cylindrical light transmitting member through which light passes through, and a wiping member pressed against the surface of the light transmitting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16070983A JPS6052875A (en) | 1983-09-01 | 1983-09-01 | Device for preventing stains of scanning optical system of electrophotographic printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16070983A JPS6052875A (en) | 1983-09-01 | 1983-09-01 | Device for preventing stains of scanning optical system of electrophotographic printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6052875A true JPS6052875A (en) | 1985-03-26 |
Family
ID=15720767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16070983A Pending JPS6052875A (en) | 1983-09-01 | 1983-09-01 | Device for preventing stains of scanning optical system of electrophotographic printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6052875A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0296783A (en) * | 1988-10-04 | 1990-04-09 | Matsushita Electric Ind Co Ltd | Electrostatic printer |
| US4970552A (en) * | 1987-05-29 | 1990-11-13 | Ricoh Company, Ltd. | Toner contamination preventive means |
-
1983
- 1983-09-01 JP JP16070983A patent/JPS6052875A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970552A (en) * | 1987-05-29 | 1990-11-13 | Ricoh Company, Ltd. | Toner contamination preventive means |
| JPH0296783A (en) * | 1988-10-04 | 1990-04-09 | Matsushita Electric Ind Co Ltd | Electrostatic printer |
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