JPS63221367A - Image recorder - Google Patents
Image recorderInfo
- Publication number
- JPS63221367A JPS63221367A JP62053962A JP5396287A JPS63221367A JP S63221367 A JPS63221367 A JP S63221367A JP 62053962 A JP62053962 A JP 62053962A JP 5396287 A JP5396287 A JP 5396287A JP S63221367 A JPS63221367 A JP S63221367A
- Authority
- JP
- Japan
- Prior art keywords
- optical writing
- writing unit
- housing
- light
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 108091008695 photoreceptors Proteins 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Laser Beam Printer (AREA)
Abstract
Description
【発明の詳細な説明】
肢」１ゆ野
本発明は、画像情報信号に応じた光線で光書込み装置を
介して感光体ドラムに光書込を行なう画像記録装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image recording apparatus that performs optical writing on a photosensitive drum via an optical writing device using a light beam according to an image information signal.
丈末挟亙
レーザプリンタやファクシミリ等の画像記録装置では、
画像情報信号により発光制御され、あるいは変調された
レーザ光線で光学書込ユニットを介して感光体に光書込
を行ない、これにより感光体上に形成された静電潜像を
現像ユニットにより現像してトナー像とし、転写チャー
ジャの作用のもとに自動給紙ユニットより給紙された転
写紙に転写し、定着して記録が行なわれる。In image recording devices such as laser printers and facsimiles,
Optical writing is performed on the photoconductor via an optical writing unit with a laser beam whose emission is controlled or modulated by an image information signal, and the electrostatic latent image formed on the photoconductor is developed by a development unit. The toner image is transferred to transfer paper fed from an automatic paper feeding unit under the action of a transfer charger, and is fixed and recorded.
ところで、従来のこの種の記録装置では、光学書込ユニ
ットは感光体の上方に設けられ感光体の上側の位置で光
書込が行なわれ、現像されてトナー像とされた後、感光
体の下側に接して設けられた転写チャージャとの間の転
写部に転写面を上に向けて給紙された転写紙に転写され
るのが通常であった。By the way, in a conventional recording device of this type, an optical writing unit is provided above the photoconductor, and optical writing is performed at a position above the photoconductor, and after being developed into a toner image, the optical writing unit is placed on the photoconductor. Normally, the image is transferred onto a transfer sheet that is fed with the transfer surface facing upward to a transfer section between the transfer charger and the transfer charger provided in contact with the lower side.
光学書込ユニットは外部から不必要な光、塵埃等が光学
系に入ることを防止し、レーザ光が外部に不必要に漏洩
するのを防止するため遮光性ハウジングに収容すること
が必要であるが、従来の装置では、光学書込ユニットが
感光体の上にある関係もあり、光学書込ユニットの光学
系を構成する要素は、書込みユニットハウジングの内部
に取付けた後、これを装置本体ベースに取付けるように
されていたため、取付けのための部品の点数が増加し、
かつ取付けに必要な工数が増加し、コスト高につく欠点
があった。The optical writing unit must be housed in a light-shielding housing to prevent unnecessary light, dust, etc. from entering the optical system from the outside, and to prevent unnecessary leakage of laser light to the outside. However, in conventional devices, the optical writing unit is located above the photoreceptor, and the elements that make up the optical system of the optical writing unit are installed inside the writing unit housing, and then attached to the device body base. Since the number of parts for installation increased,
Moreover, the number of man-hours required for installation increases, resulting in high costs.
且−汐
本発明は、従来の上記構成の画像記録装置の上述の欠点
を除去した書込み光学ユニットの光学系構成要素の取付
けのための部材の点数及び取付工数を減少させ、コスト
の低減をはかることができる画像記録装置を提供するこ
とを目的とする。The present invention eliminates the above-mentioned drawbacks of the conventional image recording device having the above structure, reduces the number of members for attaching the optical system components of the writing optical unit, and reduces the number of installation steps, thereby reducing costs. The purpose of the present invention is to provide an image recording device that can perform the following functions.
且−双
本発明は上記の目的を達成させるため、光学書込ユニッ
トを感光体の下位に設けるとともに、該光学書込ユニッ
トを構成する要素を取付ける光学書込ユニットハウジン
グが装置本体のベースカバーの一部としてこれと一体に
構成されていることを特徴とする。In order to achieve the above object, the present invention provides an optical writing unit below the photoreceptor, and an optical writing unit housing to which the elements constituting the optical writing unit are attached is mounted on the base cover of the main body of the apparatus. It is characterized by being configured integrally with this as a part.
以下１本発明の実施例を図面に基づいて詳細に説明する
。EMBODIMENT OF THE INVENTION Below, one embodiment of the present invention will be described in detail based on the drawings.
第１図は、本発明をレーザプリンタに適用した実施例を
示す図である。FIG. 1 is a diagram showing an embodiment in which the present invention is applied to a laser printer.
感光体ドラム１の周面には、矢印で示すその回転方向の
順に、帯電器２、現像ユニット３、転写チャージャ４、
クリーニングユニット５が配置されており、ｗｍ器２と
現像ユニット３との間の位置６で感光体ドラム１に書込
み光線が入射して露光するように書込光学ユニット７が
設けられている。On the circumferential surface of the photosensitive drum 1, a charger 2, a developing unit 3, a transfer charger 4,
A cleaning unit 5 is arranged, and a writing optical unit 7 is provided so that a writing beam enters and exposes the photosensitive drum 1 at a position 6 between the wm unit 2 and the developing unit 3.
この実施例の装置では、帯電器２、光書込み位！ｆ６は
感光体ドラム１の下側に配置され、光書込ユニット７は
感光体ドラム１、現像ユニット３゜クリーニングユニッ
ト５の下位に設けられている。In the device of this embodiment, the charger 2 is used for optical writing! f6 is arranged below the photoreceptor drum 1, and the optical writing unit 7 is provided below the photoreceptor drum 1, the developing unit 3, and the cleaning unit 5.
又、転写チャージャ４は感光体ドラム１の上側に配置さ
れている。転写チャージャ４と感光体ドラム１との間の
転写部に転写紙を給紙する給紙カセット８は光書込ユニ
ット７の更に下部に設けられ、転写紙はフィードローラ
９とこれに圧接するフリクションバット１０により重送
を分離されて１枚ずつ送り出され、現像ユニット３の側
方で大きくＵターンし、現像ユニット３の上方に設けら
れたレジストローラ対１１．１２により感光体ドラム１
上に形成された画像と位置が整合するようにタイミング
を合せて転写部に給紙される。転写後の転写紙径路には
定着ユニット１３が設けられ、その排出側には排紙トレ
イ１４が設けられている。Further, the transfer charger 4 is arranged above the photosensitive drum 1. A paper feed cassette 8 that feeds transfer paper to a transfer section between the transfer charger 4 and the photosensitive drum 1 is provided further below the optical writing unit 7, and the transfer paper is fed by a feed roller 9 and a friction member that presses against the feed roller 9. The double feed is separated by the bat 10 and the sheets are sent out one by one, making a large U-turn on the side of the developing unit 3, and then being transferred to the photosensitive drum 1 by a pair of registration rollers 11 and 12 provided above the developing unit 3.
The paper is fed to the transfer unit at the same timing as the image formed above. A fixing unit 13 is provided in the transfer paper path after transfer, and a paper discharge tray 14 is provided on the discharge side thereof.
書込光学ユニット７は、第１図乃至第３図に示すように
、レーザーユニット２１から発した画像情報信号に応じ
て点滅する光は第１ミラー２２で反射し、スキャナモー
タ２３の軸に一体に取付けられた偏向ミラー２４に入射
し、一定の角度範囲を繰返し偏向する。偏向光はｆ−θ
レンズ２５により感光体ドラム１上の入射位置６で直線
上に結像し等、速度で投影点が移動するように補正され
、第２ミラー２６．シリンドリカルレンズ２７を介して
感光体ドラム１に入射し、入射光の偏向により主走査が
行なわれ、感光体ドラム１の回転により副走査が行なわ
れ、画像情報信号に応じた画像が書込まれ、静電潜像が
形成される。なお符号２９は同期検知センサである。As shown in FIGS. 1 to 3, the writing optical unit 7 is configured such that the light that flashes in response to the image information signal emitted from the laser unit 21 is reflected by a first mirror 22, and is integrated with the shaft of the scanner motor 23. The light is incident on a deflection mirror 24 attached to the mirror 24, and is repeatedly deflected within a certain angular range. Polarized light is f-θ
The lens 25 forms an image on a straight line at the incident position 6 on the photoreceptor drum 1, and the projection point is corrected to move at a speed. The incident light enters the photoreceptor drum 1 through the cylindrical lens 27, main scanning is performed by deflection of the incident light, sub-scanning is performed by rotation of the photoreceptor drum 1, and an image according to the image information signal is written. An electrostatic latent image is formed. Note that the reference numeral 29 is a synchronization detection sensor.
感光体ドラム１上に形成された静電潜像は、現像ユニッ
ト３により現像されてトナー像が形成され、レジストロ
ーラ対１１．１２により給紙された転写紙に転写チャー
ジャ４の作用により転写される。転写機感光体ドラム１
より分離された転写紙は定着ユニット１３により定着さ
れ、排紙トレイ１４に排出される。The electrostatic latent image formed on the photosensitive drum 1 is developed by the developing unit 3 to form a toner image, which is transferred by the action of the transfer charger 4 onto a transfer paper fed by a pair of registration rollers 11 and 12. Ru. Transfer machine photosensitive drum 1
The separated transfer paper is fixed by a fixing unit 13, and then discharged to a paper discharge tray 14.
一方、転写検感光体ドラム１上に残留したトナーはクリ
ーニングユニット５によりクリーニングされ、次回の作
像に備える。On the other hand, the toner remaining on the transfer detection photoreceptor drum 1 is cleaned by the cleaning unit 5 in preparation for the next image formation.
さて、この装置では、第３図に詳細に示す如く、光学書
込ユニットの光学系を構成するレーザユニット２１、第
１ミラー２２、スキャナモータ２３、偏向ミラー２４．
ｆ−θレンズ２５、第２ミラー２６等を取付ける光学書
込ユニットのハウジング２８ａは装置本体のベースカバ
ー２８の一部としてこれと一体的に構成されている。ベ
ースカバー２８には給紙トレイ８が着脱できる他、現像
ユニット３１着ユニット１３、クリーニングユニット５
、転写紙給紙搬送系、コントロールボード、電源ユニッ
ト等も組込まれる。Now, in this apparatus, as shown in detail in FIG. 3, the optical system of the optical writing unit includes a laser unit 21, a first mirror 22, a scanner motor 23, a deflection mirror 24, .
The housing 28a of the optical writing unit to which the f-theta lens 25, second mirror 26, etc. are mounted is integrally formed as part of the base cover 28 of the main body of the apparatus. In addition to being able to attach and detach the paper feed tray 8 to the base cover 28, there is also a developing unit 31, a cleaning unit 5, and a cleaning unit 5.
, transfer paper feeding and transport system, control board, power supply unit, etc. are also incorporated.
本実施例の装置では１以上の如く、光学書込ユニットハ
ウジング２８ａは装置本体のベースカバー２８の一部と
して一体的に構成されているので、従来のものに比して
、ハウジングを装置本体に取付けるための部品の点数及
び取付作業工数が減少しコスト低減に効果が得られる。In the apparatus of this embodiment, the optical writing unit housing 28a is integrally formed as a part of the base cover 28 of the apparatus main body, so that the housing is attached to the apparatus main body as compared to the conventional apparatus. The number of parts to be installed and the number of installation work hours are reduced, resulting in cost reduction.
上述の如く、ベースカバー２８には各種ユニットが取付
けられるが、これらのユニットからくる種々の振動に対
しては、光学系ハウジングを形成する部分２８ａをリブ
構造で補強し、光学系に影響を及ぼさないように配慮す
ることが必要である。As mentioned above, various units are attached to the base cover 28, and the portion 28a forming the optical system housing is reinforced with a rib structure to prevent various vibrations coming from these units from affecting the optical system. It is necessary to take care to ensure that this does not occur.
なお、ベースカバー２８の光学書込ユニットハウジング
部２８ａの下側に設けた給紙トレイ８の代りにコントロ
ーラを配置することも可能である。Note that it is also possible to arrange a controller in place of the paper feed tray 8 provided below the optical writing unit housing portion 28a of the base cover 28.
紘−来
以上の如く、本発明によれば、光学書込ユニットの構成
部品の取付のための部品点数及び取付工数を減少させる
ことができるので、コスト低減に効果が得られる。As described above, according to the present invention, it is possible to reduce the number of parts and the number of man-hours required for attaching the components of the optical writing unit, resulting in an effect of cost reduction.
第１、図は本発明の実施例の装置の全体の概略構成を示
す側断面図、第２図は第１図中の■−■線による断面図
、第３図はその実施例の光学書込ユニットの構成及びハ
ウジング部の構造を示す斜視図である。
１・・・感光体
７・・・光学書込ユニット
８・・・自動給紙ユニット
２１〜２７・・・光学書込ユニット構成要素２８・・・
装置ベースカバーFigure 1 is a side sectional view showing the overall schematic configuration of an apparatus according to an embodiment of the present invention, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is an optical booklet of the embodiment. FIG. 2 is a perspective view showing the configuration of the built-in unit and the structure of the housing part. 1... Photoreceptor 7... Optical writing unit 8... Automatic paper feeding units 21 to 27... Optical writing unit component 28...
device base cover
Claims (1)
感光体に光書込を行なう画像記録装置において、上記光
学書込ユニットを感光体の下位に設けるとともに、該光
学書込ユニットを構成する要素を取付ける光学書込ユニ
ットハウジングが装置本体のベースカバーの一部として
これと一体に構成されていることを特徴とする画像記録
装置。In an image recording device that performs optical writing on a photoreceptor via an optical writing unit with a light beam in accordance with an image information signal, the optical writing unit is provided below the photoreceptor, and the optical writing unit is configured. An image recording device characterized in that an optical writing unit housing to which the elements are attached is integrally formed as a part of a base cover of the device main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62053962A JPS63221367A (en) | 1987-03-11 | 1987-03-11 | Image recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62053962A JPS63221367A (en) | 1987-03-11 | 1987-03-11 | Image recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63221367A true JPS63221367A (en) | 1988-09-14 |
Family
ID=12957307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62053962A Pending JPS63221367A (en) | 1987-03-11 | 1987-03-11 | Image recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63221367A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6527237B2 (en) | 2001-07-02 | 2003-03-04 | Harman International Industries Incorporated | Crossbar bracket assembly for speakers and monitors |
| 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 |
-
1987
- 1987-03-11 JP JP62053962A patent/JPS63221367A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6527237B2 (en) | 2001-07-02 | 2003-03-04 | Harman International Industries Incorporated | Crossbar bracket assembly for speakers and monitors |
| 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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