JPH05323774A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- Publication number
- JPH05323774A JPH05323774A JP4152728A JP15272892A JPH05323774A JP H05323774 A JPH05323774 A JP H05323774A JP 4152728 A JP4152728 A JP 4152728A JP 15272892 A JP15272892 A JP 15272892A JP H05323774 A JPH05323774 A JP H05323774A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- static elimination
- static
- photoconductor
- optical
- 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
Landscapes
- Electrophotography Configuration And Component (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Laser Beam Printer (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
(57)【要約】
【目的】 感光体や帯電器や現像器などと別体に取扱う
除電器の取扱いを容易とする。
【構成】 装置本体内の感光体のまわりに帯電器・光書
込み器・現像器・転写器・クリーニング器・除電器等の
電子写真プロセス器を配置する。前記光書込み器１６の
器ケース３０の開口部３０ａを被う防塵カバー４１に前
記除電器２５の電気回路４３を印刷し、その電気回路４
３に除電を行う除電光源４４を実装してなる。そして、
光書込み器１６に除電光源４４を一体化して設ける。
(57) [Summary] [Purpose] To facilitate the handling of the static eliminator, which is handled separately from the photoconductor, charger and developer. [Structure] Electrophotographic process devices such as a charger, an optical writing device, a developing device, a transfer device, a cleaning device, and a static eliminator are arranged around the photoconductor in the main body of the apparatus. The electric circuit 43 of the static eliminator 25 is printed on the dustproof cover 41 covering the opening 30a of the container case 30 of the optical writer 16, and the electric circuit 4 thereof is printed.
A static elimination light source 44 for eliminating static electricity is mounted on 3. And
A static elimination light source 44 is provided integrally with the optical writer 16.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、たとえばレ−ザを用
いた、プリンタ・複写機・ファクシミリなど、帯電・光
書込み・現像・転写・クリーニング・除電の電子写真プ
ロセスを繰返して感光体上に形成した画像を転写してシ
ートに記録を行う電子写真装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer, a copying machine, a facsimile, etc., using a laser, for example, by repeating an electrophotographic process of charging, optical writing, development, transfer, cleaning and charge removal on a photoreceptor. The present invention relates to an electrophotographic apparatus that transfers a formed image to record on a sheet.
【０００２】[0002]
【従来の技術】たとえばレーザプリンタは、帯電器・光
書込み器・現像器・転写器・クリーニング器・除電器等
の電子写真プロセス器を備える。この電子写真プロセス
器のうち、帯電器・現像器・転写器・クリーニング器
は、感光体と同じく機械寿命に対して寿命が短いため、
消耗品として取扱う。そして、たとえば前記電子写真プ
ロセス器のうち、帯電器や現像器を感光体と一体化して
感光体ユニットを形成し、それを一定の期間でユニット
ごと交換する構成としてメンテナンスの操作性を向上し
ていた。2. Description of the Related Art For example, a laser printer is equipped with an electrophotographic process device such as a charging device, an optical writing device, a developing device, a transfer device, a cleaning device, and a static eliminator. Of these electrophotographic process devices, the charging device, the developing device, the transfer device, and the cleaning device have a shorter life than the mechanical life of the photoconductor, so
Handle as a consumable item. Further, for example, in the electrophotographic process device, a charger and a developing device are integrated with a photoconductor to form a photoconductor unit, and the unit is exchanged for a certain period to improve operability of maintenance. It was
【０００３】ところが、前記除電器は、除電光源の寿命
が比較的長く、前記感光体や帯電器や転写器などに比べ
て長く使用することができる。そのため、従来のレーザ
プリンタでは、除電器をそれら感光体や帯電器や現像器
などと別部品として取り扱い、それを単独で装置本体に
取り付けていた。However, since the static eliminator has a relatively long life of the static eliminator, it can be used longer than the photoconductor, the charger and the transfer device. Therefore, in the conventional laser printer, the static eliminator is handled as a separate component from the photoconductor, the charger, the developing device, and the like, and is attached to the apparatus body alone.
【０００４】[0004]
【発明が解決しようとする課題】すなわち、従来のレー
ザプリンタでは、除電器を感光体や帯電器や現像器など
と別体に取り扱い、それを単独で装置本体に取り付ける
ので、除電器の取扱いが面倒となる問題があった。That is, in the conventional laser printer, the static eliminator is handled separately from the photoconductor, the charger, the developing device, etc., and it is attached to the main body of the apparatus independently. There was a troublesome problem.
【０００５】そこで、この発明の目的は、感光体や帯電
器や現像器などと別体に取扱う除電器の取扱いを容易と
することにある。Therefore, an object of the present invention is to facilitate the handling of a static eliminator that is handled separately from the photoconductor, the charger, the developing device and the like.
【０００６】[0006]
【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とおり、
帯電・光書込み・現像・転写・除電の電子写真プロセス
を繰返し、感光体１１上に形成した画像を転写してシー
トＳに記録を行う電子写真装置において、前記光書込み
を行う光書込み器１６に印刷した電気回路４３に、前記
除電を行う除電光源４４を実装してなることを特徴とす
る。Therefore, what is stated in claim 1 is, for example, as shown in the following illustrated embodiment,
In the electrophotographic apparatus for transferring the image formed on the photoconductor 11 and recording the image on the sheet S by repeating the electrophotographic process of charging, optical writing, development, transfer and charge removal, the optical writer 16 for optical writing is used. It is characterized in that a static elimination light source 44 for eliminating the static electricity is mounted on the printed electric circuit 43.
【０００７】請求項２に記載のものは、たとえば以下の
図示実施例に示すとおり、請求項１に記載の電子写真装
置において、前記除電光源４４のまわりを白色に形成し
てなることを特徴とする。According to a second aspect of the present invention, for example, as shown in the following illustrated embodiment, the electrophotographic apparatus according to the first aspect is characterized in that the static elimination light source 44 is formed in a white color. To do.
【０００８】請求項３に記載のものは、たとえば以下の
図示実施例に示すとおり、請求項１に記載の電子写真装
置において、前記光書込み器１６の露光窓４２と前記除
電光源４４との間に遮蔽板４７を設けてなることを特徴
とする。According to a third aspect of the present invention, for example, as shown in the following illustrated embodiment, in the electrophotographic apparatus of the first aspect, between the exposure window 42 of the optical writer 16 and the neutralization light source 44. It is characterized in that a shielding plate 47 is provided on the.
【０００９】[0009]
【作用】そして、請求項１に記載のものでは、光書込み
器１６に除電光源４４を一体化して設ける。According to the first aspect of the invention, the static elimination light source 44 is provided integrally with the optical writer 16.
【００１０】請求項２に記載のものでは、除電時、除電
光源４４の光の反射率を上げる。According to the second aspect, the light reflectance of the static elimination light source 44 is increased during static elimination.
【００１１】請求項３に記載のものでは、露光窓４２側
へ漏れる除電光源４４の光を遮蔽板４７で遮る。According to the third aspect of the invention, the light of the static elimination light source 44 leaking to the exposure window 42 side is blocked by the shield plate 47.
【００１２】[0012]
【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３は、この発明の一実施例である
レーザプリンタの全体概略構成図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is an overall schematic configuration diagram of a laser printer which is an embodiment of the present invention.
【００１３】図中符号１０は、装置本体を示す。装置本
体１０内には、ほぼ中央にベルト状の感光体１１を設け
る。その感光体１１のまわりには、矢印で示す駆動方向
に順に、帯電器１２、現像器１３、転写器１４、クリー
ニング器１５などを配置する。また、感光体１１の上方
に光書込み器１６を配置し、装置本体１０の底部付近に
給紙カセット１７を設ける。Reference numeral 10 in the figure denotes the apparatus main body. A belt-shaped photosensitive body 11 is provided in the apparatus main body 10 substantially at the center. Around the photoconductor 11, a charging device 12, a developing device 13, a transfer device 14, a cleaning device 15, and the like are arranged in order in the driving direction indicated by the arrow. An optical writer 16 is arranged above the photoconductor 11 and a paper feed cassette 17 is provided near the bottom of the apparatus body 10.
【００１４】そして、前記給紙カセット１７から給紙ロ
−ラ２１でシートＳを矢印Ａ方向に送り出し、そのシー
トＳをレジストロ−ラ対１８によりタイミングをとって
感光体１１と転写器１４間へと搬送する。感光体１１
は、時計方向に回転駆動し、その際帯電器１２によって
表面を一様に帯電し、光書込み器１６からのレ−ザ光を
照射して感光体１１上に静電潜像を形成する。この潜像
は、現像器１３を通るときトナ−によって可視像化す
る。この可視像は、感光体１１と転写器１４間へ搬送し
たシ−トＳに転写器１４により転写し、転写したシ−ト
Ｓ上の可視像は、定着器１９によって定着する。そし
て、定着器１９を出たシ−トＳは、搬送ロ−ラ対２０に
よって搬送する。Then, the sheet S is sent out from the sheet feeding cassette 17 by the sheet feeding roller 21 in the direction of the arrow A, and the sheet S is transferred between the photoconductor 11 and the transfer unit 14 at a timing by the pair of registration rollers 18. And carry. Photoconductor 11
Is rotated clockwise, at which time the surface is uniformly charged by the charger 12, and the laser light from the optical writer 16 is irradiated to form an electrostatic latent image on the photoconductor 11. This latent image is visualized by a toner as it passes through the developing device 13. This visible image is transferred by the transfer device 14 to the sheet S conveyed between the photoconductor 11 and the transfer device 14, and the transferred visible image on the sheet S is fixed by the fixing device 19. Then, the sheet S exiting the fixing device 19 is conveyed by a pair of conveying rollers 20.
【００１５】その搬送ロ−ラ対２０を通過したシ−トＳ
は、図示しない切換爪による方向切り換えに従って、画
像面を上にしたまま矢印Ｂ方向に排出するか、またはシ
−ト搬送路２２を通って排紙ローラ対２３により矢印Ｃ
方向へ搬送され、装置本体１０上の排紙部２４へ画像面
を下にして排出する。The sheet S passing through the carrier roller pair 20
Is discharged in the direction of arrow B with the image surface facing upward according to the direction switching by a switching claw (not shown), or passes through the sheet transport path 22 and is discharged by the pair of discharge rollers 23 to the direction of arrow C.
The sheet is conveyed in the direction, and is discharged to the sheet discharge unit 24 on the apparatus main body 10 with the image surface facing downward.
【００１６】一方、転写後、感光体１１は、クリーニン
グ器１５で表面の残留トナーを除去して清掃し、除電器
２５で除電する。On the other hand, after the transfer, the photoconductor 11 is cleaned by removing the residual toner on the surface thereof by the cleaning device 15, and is discharged by the charge removing device 25.
【００１７】ところで、光書込みを行う前記光書込み器
１６は、詳しくは図１に示すように構成する。図中符号
３０は、光書込み器１６の器ケースである。その器ケー
ス３０は、やや底の浅い箱形状で、図中上向きに開口部
３０ａを備える。前記器ケース３０内には、ポリゴンス
キャナ３１、結像レンズ３３・３４、反射ミラー３５・
３６・３７、同期検知ユニット３８などを収納して配置
する。また、前記器ケース３０の側板３０ｂには、係合
突起３０ｃを外向きに突出して複数設けるとともに、Ｌ
Ｄユニット３９を取り付けてなる。By the way, the optical writer 16 for performing the optical writing is constructed in detail as shown in FIG. Reference numeral 30 in the drawing is a container case of the optical writer 16. The container case 30 has a box shape with a slightly shallow bottom, and has an opening 30a facing upward in the drawing. A polygon scanner 31, image forming lenses 33, 34, a reflecting mirror 35,
36 and 37, the synchronization detection unit 38, etc. are accommodated and arranged. In addition, a plurality of engaging protrusions 30c are provided on the side plate 30b of the container case 30 so as to project outward and L
The D unit 39 is attached.
【００１８】前記器ケース３０の開口部３０ａは、防塵
カバー４１で被ってなる。その防塵カバー４１は、板金
で形成し、その一側に沿って露光窓４２を形成する。そ
の露光窓４２は、防塵ガラスで被って設ける。該露光窓
４２より内側寄りの前記防塵カバー４１の表面には、該
露光窓４２と平行に前記除電器２５の電気回路４３を印
刷し、この電気回路４３に除電を行うＬＥＤ等の電気素
子チップ（除電光源）４４………を実装してなる。ま
た、前記防塵カバー４１の外縁には、係合孔４５ａを有
する係合片４５を図中下向きに折り曲げて設ける。そし
て、この防塵カバー４１を前記器ケース３０の開口部３
０ａに被せ、前記係合孔４５ａに係合突起３０ｃを係合
するとともに、図示しないビスで器ケース３０に固定し
て設ける。そうして、前記光書込み器１６に前記除電光
源４４を一体化し、前記電気回路４３の図示しないコネ
クタを器ケース３０に設けた図示しないコネクタに接続
する。その後、該光書込み器１６を装置本体１０内に取
り付けると、該器ケース３０のハーネスを介して装置本
体１０の電気制御部に接続する。The opening 30a of the container case 30 is covered with a dustproof cover 41. The dust-proof cover 41 is formed of sheet metal, and an exposure window 42 is formed along one side thereof. The exposure window 42 is provided so as to be covered with dustproof glass. On the surface of the dustproof cover 41, which is located inward of the exposure window 42, an electric circuit 43 of the static eliminator 25 is printed in parallel with the exposure window 42, and an electric element chip such as an LED for performing static elimination on the electric circuit 43. (Static elimination light source) 44 ... Is mounted. Further, an engaging piece 45 having an engaging hole 45a is provided on the outer edge of the dust cover 41 by being bent downward in the drawing. The dust cover 41 is attached to the opening 3 of the container case 30.
0a, the engaging projection 30c is engaged with the engaging hole 45a, and is fixed to the container case 30 with a screw (not shown). Then, the static elimination light source 44 is integrated with the optical writer 16, and the connector (not shown) of the electric circuit 43 is connected to the connector (not shown) provided in the container case 30. After that, when the optical writer 16 is installed in the device body 10, the optical writer 16 is connected to the electric control unit of the device body 10 through the harness of the device case 30.
【００１９】しかして、この光書込み器１６の書き込み
時、図１に示すように、ＬＤユニット３９から出射され
たレーザ光Ｌは、一定の高速度で回転するポリゴンスキ
ャナ３１のミラー面に入射する。その反射光は、ミラー
面が回転することにより各面ごとに所定の角度範囲を偏
向し、繰り返し同じ角度範囲を走査する。そして、この
レーザ光Ｌは、結像レンズ３３・３４を通り、反射ミラ
ー３５・３６・３７で所定の方向に反射し、露光窓４２
を通過して前記感光体１１上に結像する。一方、ポリゴ
ンスキャナ３１で反射した同期検知用のレーザ光は、同
期検知ユニット３８の同期検知ミラーを経て同期検知セ
ンサで検知され、１走査ごとに画像形成用レーザ光の発
光開始（光書込み開始）タイミングを制御する。Therefore, at the time of writing by the optical writer 16, as shown in FIG. 1, the laser light L emitted from the LD unit 39 is incident on the mirror surface of the polygon scanner 31 rotating at a constant high speed. .. The reflected light deflects a predetermined angle range for each surface as the mirror surface rotates, and repeatedly scans the same angle range. Then, the laser light L passes through the imaging lenses 33 and 34 and is reflected in a predetermined direction by the reflection mirrors 35, 36, and 37, and the exposure window 42.
To form an image on the photoconductor 11. On the other hand, the laser light for synchronization detection reflected by the polygon scanner 31 is detected by the synchronization detection sensor via the synchronization detection mirror of the synchronization detection unit 38, and the emission of the laser light for image formation is started every scanning (optical writing start). Control timing.
【００２０】そうして、前記感光体１１の表面は、前記
クリーニング器１５で残留トナーをクリーニング後、除
電光源４４の光により除電する。Then, the surface of the photoconductor 11 is destaticized by the light of the destaticizing light source 44 after the residual toner is cleaned by the cleaning device 15.
【００２１】なお、前記除電光源４４のまわりは、白色
で形成するとよい。すると、除電時、反射率が上がり、
光の利用効率が上がる。The area around the static elimination light source 44 is preferably formed in white. Then, when removing electricity, the reflectance increases,
Use efficiency of light is improved.
【００２２】また、前記除電光源４４と前記光書込み器
１６の露光窓４２との間には、図２に示すように、遮蔽
板４７を設けるとよい。そして、除電時、遮蔽板４７で
除電光源４４の光を遮蔽し、除電光源４４と隣接する帯
電器１２側に光が漏れることを防止する。A shielding plate 47 may be provided between the charge eliminating light source 44 and the exposure window 42 of the optical writer 16 as shown in FIG. Then, at the time of static elimination, the shielding plate 47 shields the light of the static elimination light source 44 to prevent the light from leaking to the charger 12 side adjacent to the static elimination light source 44.
【００２３】[0023]
【発明の効果】したがって、この発明によれば、光書込
みを行う光書込み器に印刷した電気回路に、除電を行う
除電光源を実装して光書込み器に除電光源を一体化する
ので、除電器の製造を容易とするとともに、除電器を単
独に取扱う必要がないから除電器の取扱いを容易にする
ことができる。Therefore, according to the present invention, since the static elimination light source for eliminating static electricity is mounted on the electric circuit printed on the photo-writing device for performing optical writing and the static elimination light source is integrated with the photo-writing device, the static elimination device is eliminated. In addition to facilitating the manufacture of, it is possible to facilitate the handling of the static eliminator since it is not necessary to handle the static eliminator separately.
【００２４】請求項２に記載のものによれば、除電時、
除電光源の光の反射率を上げるので、その光の利用効率
を向上させることができる。According to the second aspect, at the time of static elimination,
Since the reflectance of the light of the static elimination light source is increased, the utilization efficiency of the light can be improved.
【００２５】請求項３に記載のものによれば、除電光源
の光が露光窓側へ漏れることを遮蔽板で防ぐので、たと
えば露光窓側に隣接して位置する帯電器へ除電光源の光
が漏れることを遮蔽してその除電光源の光による均一帯
電の障害および帯電効率の低下を防止することができ
る。According to the third aspect of the present invention, the light from the static elimination light source is prevented from leaking to the exposure window side by the shield plate, so that the light of the static elimination light source leaks to the charger located adjacent to the exposure window side, for example. It is possible to prevent the obstacle of uniform charging and the decrease of charging efficiency due to the light of the static elimination light source by blocking the light.
【図１】この発明の一実施例であるレーザプリンタに備
える光書込み器で、その器ケースと防塵カバーに分離し
た斜視図である。FIG. 1 is a perspective view of an optical writer provided in a laser printer according to an embodiment of the present invention, in which a container case and a dust cover are separated.
【図２】その防塵カバーの変形例を示す斜視図である。FIG. 2 is a perspective view showing a modified example of the dustproof cover.
【図３】前記光書込み器を備えるレーザプリンタの内部
機構全体の概略構成図である。FIG. 3 is a schematic configuration diagram of an entire internal mechanism of a laser printer including the optical writer.
１６ 光書込み器 ４２ 露光窓 ４３ 電気回路 ４４ 除電光源 ４７ 遮蔽板 16 Optical Writer 42 Exposure Window 43 Electric Circuit 44 Eliminating Light Source 47 Shielding Plate
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０３Ｇ 21/00 １１６ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location G03G 21/00 116
Claims (3)
子写真プロセスを繰返して感光体上に形成した画像を転
写してシートに記録を行う電子写真装置において、前記
光書込みを行う光書込み器に印刷した電気回路に、前記
除電を行う除電光源を実装してなる、電子写真装置。1. In an electrophotographic apparatus for recording an image on a sheet by repeating an electrophotographic process of charging, optical writing, developing, transferring and discharging, and recording the image on a sheet, the optical writing is performed. An electrophotographic apparatus comprising a static elimination light source for eliminating the static electricity, which is mounted on an electric circuit printed on a container.
なる、請求項１に記載の電子写真装置。2. The electrophotographic apparatus according to claim 1, wherein a white color is formed around the static elimination light source.
との間に遮蔽板を設けてなる、請求項１に記載の電子写
真装置。3. The electrophotographic apparatus according to claim 1, wherein a shielding plate is provided between the exposure window of the optical writer and the charge eliminating light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4152728A JPH05323774A (en) | 1992-05-20 | 1992-05-20 | Electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4152728A JPH05323774A (en) | 1992-05-20 | 1992-05-20 | Electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05323774A true JPH05323774A (en) | 1993-12-07 |
Family
ID=15546862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4152728A Pending JPH05323774A (en) | 1992-05-20 | 1992-05-20 | Electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05323774A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1531367A2 (en) | 2003-11-11 | 2005-05-18 | Ricoh Company | A method and apparatus for image forming capable of effectively avoiding an adverse temperature effect to an optical scanning system |
-
1992
- 1992-05-20 JP JP4152728A patent/JPH05323774A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1531367A2 (en) | 2003-11-11 | 2005-05-18 | Ricoh Company | A method and apparatus for image forming capable of effectively avoiding an adverse temperature effect to an optical scanning system |
| EP1531367A3 (en) * | 2003-11-11 | 2005-08-24 | Ricoh Co., Ltd. | A method and apparatus for image forming capable of effectively avoiding an adverse temperature effect to an optical scanning system |
| US7215349B2 (en) | 2003-11-11 | 2007-05-08 | Ricoh Co., Ltd. | Method and apparatus for image forming capable of effectively avoiding an adverse temperature effect to an optical scanning system |
| US7619643B2 (en) | 2003-11-11 | 2009-11-17 | Ricoh Co., Ltd. | Method and apparatus for image forming capable of effectively avoiding an adverse temperature effect to an optical scanning system |
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