JP2002062503A - Optical writing unit - Google Patents

Optical writing unit

Info

Publication number
JP2002062503A
JP2002062503A JP2000250112A JP2000250112A JP2002062503A JP 2002062503 A JP2002062503 A JP 2002062503A JP 2000250112 A JP2000250112 A JP 2000250112A JP 2000250112 A JP2000250112 A JP 2000250112A JP 2002062503 A JP2002062503 A JP 2002062503A
Authority
JP
Japan
Prior art keywords
optical
writing unit
optical writing
substrate
polygon motor
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
JP2000250112A
Other languages
Japanese (ja)
Inventor
Akira Kojima
晃 小嶋
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2000250112A priority Critical patent/JP2002062503A/en
Publication of JP2002062503A publication Critical patent/JP2002062503A/en
Pending legal-status Critical Current

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  • Laser Beam Printer (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an optical writing unit with which the attachment, detachment and positioning of a polygon motor can be performed very easily and safely. SOLUTION: The side face of an optical housing 3 is provided with an aperture 21, and the polygon motor 5 can be mounted in the optical housing 3 from its lateral side. The polygon motor 5 is inserted in the back of an opening part 21 while holding the board 15 of the polygon motor 5 between upper guide rails 22 and lower guide rails 23 provided on partition walls 13, then the sleeve 20 of a bottom surface side is inserted in a sleeve holding member 25. The positioning of the direction orthogonal to a polygon motor shaft is performed on the wall surface of the sleeve holding member 25. The positioning of the direction of the polygon motor shaft (Z direction) is performed by abutting the bottom surface of the board 15 on the abutting part 24 of the lower guide rail 23. Fixing is performed by a pressing member provided on a small cover 26. A connector 17 is disposed at a position close to the opening part 21, and a harness is took out from the notch 29 of the small cover 26.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、例えばデジタル複
写機、ファクシミリ等の感光体露光装置、レーザープリ
ンタ、レーザープロッタ等の光偏向装置を用いる機器用
のレーザー光を偏向走査する装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for deflecting and scanning a laser beam for an apparatus using an optical deflecting device such as a photoreceptor exposing device such as a digital copying machine and a facsimile, a laser printer and a laser plotter.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】近年、
画像形成装置のデジタル化が進み、静電写真プロセスを
用いる装置では、光書込ユニットから偏向したレーザー
光を感光体に書き込むものが一般的になっている。光書
込ユニットでは、モータに取り付けた回転多面鏡(以下
ポリゴンミラーという。)によってレーザービームを偏
向する方式が大勢を占めている。
2. Description of the Related Art In recent years,
With digitization of image forming apparatuses progressing, apparatuses using an electrostatographic process generally write laser light deflected from an optical writing unit onto a photoconductor. In the optical writing unit, a system in which a laser beam is deflected by a rotating polygon mirror (hereinafter, referred to as a polygon mirror) attached to a motor has prevailed.

【0003】このポリゴンミラーを装備する光偏向装置
(以下ポリゴンモータという。)は、軸受部の機械的磨
耗や潤滑油の減少等により、画像形成装置の機械寿命よ
りも早く故障することがあり、そのためポリゴンモータ
を容易に交換できる構造が画像形成装置には求められて
いる。
An optical deflecting device equipped with this polygon mirror (hereinafter referred to as a polygon motor) may fail sooner than the mechanical life of the image forming apparatus due to mechanical wear of a bearing portion, reduction of lubricating oil, and the like. Therefore, a structure in which the polygon motor can be easily replaced is required for the image forming apparatus.

【0004】ポリゴンモータは、従来はカバー一体型の
フルカバードモータと呼ばれるものが多かったが、この
タイプのポリゴンモータの多くは、モータ駆動用のドラ
イバ及びその周辺の電気回路を載置する電気基板が別体
で用意されていた。しかしながら近年では、主にコスト
上の理由より、基板一体型のポリゴンモータが増加して
いる。
Conventionally, many polygon motors are so-called full-covered motors with an integrated cover. However, many of these types of polygon motors include an electric board on which a motor driver and an electric circuit around it are mounted. Was prepared separately. However, in recent years, the number of polygon motors integrated with a substrate has been increasing, mainly for cost reasons.

【0005】図1は、基板一体型ポリゴンモータを装備
した光書き込みユニットの構造を示す平面図(A)と側
面断面図(B)である。画像形成装置1の内部に位置す
る光書込ユニット2は、光学素子を所定の位置に載置す
る光学ハウジング3、光学ハウジング3の内部を外部と
遮断して防塵、遮音の機能を果たすハウジングカバー
4、ポリゴンモータ5、レーザー発振ユニット6及びそ
の他の複数の光学素子で構成してある。ポリゴンモータ
5は光学ハウジング3に4本のネジで直接に締結してあ
る。
FIG. 1 is a plan view (A) and a side sectional view (B) showing the structure of an optical writing unit equipped with a substrate-integrated polygon motor. An optical writing unit 2 located inside the image forming apparatus 1 includes an optical housing 3 for mounting an optical element at a predetermined position, and a housing cover that functions as a dust proof and a sound shield by blocking the inside of the optical housing 3 from the outside. 4, a polygon motor 5, a laser oscillation unit 6, and a plurality of other optical elements. The polygon motor 5 is directly fastened to the optical housing 3 with four screws.

【0006】レーザー発振ユニット6から射出されたビ
ーム光は、シリンダレンズ7を通ってポリゴンミラー8
に照射され、ポリゴンミラー8で反射したビーム光はf
θレンズ9、長尺レンズ10、防塵ガラス11を通って
感光体12上に導かれ、ポリゴンミラー8の回転に伴っ
てビーム光は直線状に感光体12の面を走査し、静電潜
像を形成する。この静電潜像は、周知の画像形成プロセ
スを経て顕像化され、紙等の転写材の上に画像として形
成される。
The light beam emitted from the laser oscillation unit 6 passes through a cylinder lens 7 and a polygon mirror 8
And the beam light reflected by the polygon mirror 8 is f
The light beam is guided onto the photoreceptor 12 through the θ lens 9, the long lens 10, and the dustproof glass 11, and the light beam scans the surface of the photoreceptor 12 linearly with the rotation of the polygon mirror 8, thereby forming an electrostatic latent image. To form This electrostatic latent image is visualized through a known image forming process, and is formed as an image on a transfer material such as paper.

【0007】ポリゴンモータ5の周囲は騒音の低減のた
めに隔壁13で囲んで略密閉してある。隔壁13には、
レーザー発振ユニット6から射出されたビーム光が通過
する防音ガラス14を設けてある。
The periphery of the polygon motor 5 is surrounded by a partition wall 13 to reduce noise, and is substantially closed. In the partition 13,
The soundproof glass 14 through which the light beam emitted from the laser oscillation unit 6 passes is provided.

【0008】図2は、市場で多く使われているタイプの
基板一体型ポリゴンモータの構成を示す斜視図である。
ポリゴンモータ5は、板厚1mm程度の鉄製の基板15
の上にポリゴンミラー8及びモータ軸受、ステータ等の
回転部(図示せず)、ドライバIC16、その他電気回
路(図示せず)、コネクタ17を全て一体に装備してい
る。基板15の四隅には、取り付けを行うためのネジ穴
18が設けてある。
FIG. 2 is a perspective view showing the configuration of a substrate-integrated polygon motor of a type widely used in the market.
The polygon motor 5 has an iron substrate 15 having a thickness of about 1 mm.
, A polygon mirror 8, a rotating part such as a motor bearing and a stator (not shown), a driver IC 16, other electric circuits (not shown), and a connector 17 are all integrally provided. At four corners of the substrate 15, screw holes 18 for mounting are provided.

【0009】図3は、上述のような基板一体型ポリゴン
モータの位置決め及び固定のための部分を示す斜視図で
ある。ポリゴンモータ軸と直交する方向(図中X、Y方
向)の固定は、ポリゴンモータ軸を支持し、基板15の
底面に突出する円柱状のスリーブ20の外周部を光学ハ
ウジング3の底面部に設けた位置決め穴に嵌合させるこ
とで行う。またポリゴンモータ軸方向(図中Z方向)の
固定は、ネジ穴18の周囲の当接範囲19が当接するよ
うなネジボスを光学ハウジング3の底面部に設けておい
て、これにネジを締結することで行う。このため、この
タイプの基板一体型ポリゴンモータの着脱においては、
4ヶ所のネジをドライバーで上方から取り付けたり、外
したりといった作業が必要である。
FIG. 3 is a perspective view showing a portion for positioning and fixing the substrate-integrated polygon motor as described above. The fixing in the direction (X and Y directions in the figure) orthogonal to the polygon motor shaft is performed by providing the outer periphery of a cylindrical sleeve 20 that supports the polygon motor shaft and protrudes from the bottom surface of the substrate 15 on the bottom surface of the optical housing 3. This is done by fitting it into the positioning hole. For fixing in the axial direction of the polygon motor (Z direction in the figure), a screw boss is provided on the bottom surface of the optical housing 3 so that a contact area 19 around the screw hole 18 abuts, and a screw is fastened to this. Do it by doing. Therefore, when attaching and detaching this type of substrate-integrated polygon motor,
It is necessary to attach and remove four screws from above with a screwdriver.

【0010】すなわちポリゴンモータ5が故障して交換
する必要が生じたときにポリゴンモータ5を取り外すに
は、(1)画像形成装置1から光書込ユニット2を取り
出し、(2)光書込ユニット2からハウジングカバー4
を取り外し、(3)ポリゴンモータ5を締結している4
本のネジを外してポリゴンモータ5を取り出し、(4)
ポリゴンモータ5に差し込まれているハーネスを外すと
いう手順が必要である。もちろん新しいポリゴンモータ
5を装着する手順は上記と逆になる。
That is, to remove the polygon motor 5 when the polygon motor 5 needs to be replaced due to failure, (1) take out the optical writing unit 2 from the image forming apparatus 1 and (2) take out the optical writing unit. 2 to housing cover 4
And (3) the polygon motor 5 is fastened 4
Remove the screws and take out the polygon motor 5, (4)
A procedure for removing the harness inserted into the polygon motor 5 is required. Of course, the procedure for mounting a new polygon motor 5 is reversed.

【0011】上記手順(1)ないし(3)にはドライバ
等の工具が必要であり、特に手順(1)では外装カバー
や他のユニットを外す等の手間が掛かり、比較的大変な
作業になる。また、近年の画像形成装置では装置の小型
化や、転写紙搬送経路を短縮するためのレイアウトを採
用しているため、光書込ユニットが装置の中央部に配置
される場合が増加しており、従来より更に手順(1)の
作業に手間が掛かる傾向にある。
The above steps (1) to (3) require a tool such as a screwdriver. In step (1), it takes a lot of time to remove the outer cover and other units, which makes the operation relatively difficult. . Further, in recent image forming apparatuses, since a layout for reducing the size of the apparatus and shortening the transfer paper transport path is adopted, the case where the optical writing unit is arranged at the center of the apparatus is increasing. However, there is a tendency that the work of the procedure (1) is more troublesome than in the past.

【0012】また、上述のタイプの基板一体型ポリゴン
モータでは、ポリゴンミラー8が露出しているので、故
障時の交換作業で過ってポリゴンミラー8に指を触れさ
せて汚れを付着させたり、傷を付けたり、また落下させ
たりしたときに軸倒れが起こったりといった問題が発生
しやすい。
In the above-described type of substrate-integrated polygon motor, since the polygon mirror 8 is exposed, the replacement operation at the time of failure may cause the polygon mirror 8 to be touched with a finger, thereby causing dirt to adhere. Problems such as axis falling when scratched or dropped are liable to occur.

【0013】そこで、例えば特開平6−324279号
公報等に開示されているように、ポリゴンモータ等を覆
うカバーでサブユニットを構成する技術がいくつか提案
されているが、部品点数が増え、その分コストが増加し
てしまうという新たな問題を生じさせている。
Therefore, as disclosed in, for example, Japanese Patent Application Laid-Open No. 6-324279, there have been proposed some techniques for forming a subunit with a cover for covering a polygon motor or the like. This raises a new problem that the cost increases.

【0014】本発明は上記従来の諸問題点にかんがみ、
ポリゴンモータの着脱が極めて容易かつ安全で、ポリゴ
ンモータの位置決めや固定が極力工具を用いずに行え、
少ない部品点数で低コストな構成の光書込ユニットを提
供することを目的とする。
The present invention has been made in view of the above-mentioned conventional problems,
It is extremely easy and safe to attach and detach the polygon motor.Positioning and fixing of the polygon motor can be performed without using tools as much as possible.
An object of the present invention is to provide an optical writing unit having a low number of components and a low cost.

【0015】[0015]

【課題を解決するための手段】本発明の請求項1に係る
光書込ユニットは、上記目的を達成するために、回転多
面鏡と、該回転多面鏡の電気的駆動部分を板状の基板の
上に一体に備える光偏向装置と、光ビーム発生手段から
出射された光ビームを偏向し、該偏向した光ビームを結
像する光学系等とを光学箱の中に備えてなる光書込ユニ
ットにおいて、上記光偏向装置の着脱を上記回転多面鏡
の軸と直交する方向から可能とする着脱部位を上記光学
箱に設けてなることを特徴とする。
In order to achieve the above object, an optical writing unit according to a first aspect of the present invention comprises a rotating polygon mirror and an electrically driven portion of the rotating polygon mirror, which is a plate-like substrate. An optical box comprising an optical deflecting device integrally provided on an optical box, and an optical system for deflecting a light beam emitted from a light beam generating means and forming an image of the deflected light beam in an optical box. The unit is characterized in that the optical box is provided with an attachment / detachment portion that enables attachment / detachment of the light deflection device from a direction orthogonal to an axis of the rotary polygon mirror.

【0016】同請求項2に係る光書込ユニットは、上記
目的を達成するために、上記光学箱の上記着脱部位の内
側に、上記光偏向装置を着脱するためのガイド手段を設
けてなることを特徴とする。
According to a second aspect of the present invention, in order to achieve the above object, a guide means for attaching and detaching the optical deflecting device is provided inside the attaching and detaching portion of the optical box. It is characterized by.

【0017】同請求項3に係る光書込ユニットは、上記
目的を達成するために、上記着脱部位が、上記光学箱内
への上記光偏向装置の装着及び該装着状態の上記光偏向
装置の取り出しのための開口部と、該開口部を覆うカバ
ーとを備え、該カバーが上記光偏向装置の固定手段を兼
ねることを特徴とする。
According to a third aspect of the present invention, in the optical writing unit, in order to achieve the above object, the attaching / detaching portion is provided for mounting the optical deflecting device in the optical box and for mounting the optical deflecting device in the mounted state. An opening for taking out and a cover for covering the opening are provided, and the cover also serves as fixing means for the light deflecting device.

【0018】同請求項4に係る光書込ユニットは、上記
目的を達成するために、上記着脱部位が、上記光偏向装
置の着脱用の開口部を備え、上記光偏向装置の設置方向
を、該光偏向装置のハーネス取付部が上記開口部に最も
近接した位置になる向きとしてなることを特徴とする。
According to a fourth aspect of the present invention, in order to achieve the above object, the attaching / detaching portion has an opening for attaching / detaching the optical deflecting device, and the installation direction of the optical deflecting device is The light deflecting device is characterized in that the harness mounting portion is oriented so as to be closest to the opening.

【0019】同請求項5に係る光書込ユニットは、上記
目的を達成するために、上記光偏向装置の設置基準が、
上記回転多面鏡の軸方向については上記基板の底面の所
定の範囲を支持して行い、上記回転多面鏡の軸と直交す
る方向については、該回転多面鏡の軸を保持しかつ上記
基板の底面に突出した円柱状のスリーブの外周を嵌合す
ることで行うものであり、上記着脱部位に上記基板の底
面を支持する部材及び上記スリーブの外周を保持する部
材を有することを特徴とする。
According to a fifth aspect of the present invention, in the optical writing unit, in order to achieve the above object, the installation standard of the optical deflector is:
In the axial direction of the rotary polygon mirror, a predetermined range of the bottom surface of the substrate is supported, and in the direction orthogonal to the axis of the rotary polygon mirror, the axis of the rotary polygon mirror is held and the bottom surface of the substrate is held. This is performed by fitting an outer periphery of a cylindrical sleeve protruding from the base, and a member that supports the bottom surface of the substrate and a member that holds the outer periphery of the sleeve are provided at the attachment / detachment site.

【0020】同請求項6に係る光書込ユニットは、上記
目的を達成するために、上記光学箱が、上記着脱部位に
上記基板を押圧する部材を備えることを特徴とする。
In order to achieve the above object, the optical writing unit according to claim 6 is characterized in that the optical box includes a member for pressing the substrate at the attachment / detachment site.

【0021】同請求項7に係る光書込ユニットは、上記
目的を達成するために、上記光学箱が上記押圧部材を一
体成形した樹脂成形品であることを特徴とする。
According to a seventh aspect of the present invention, in order to achieve the above object, the optical box is a resin molded product in which the pressing member is integrally formed.

【0022】[0022]

【発明の実施の形態】以下本発明の実施の形態を図面を
参照して説明する。なお以下では従来と共通する部分に
は共通する符号を付すにとどめ重複する説明は省略す
る。
Embodiments of the present invention will be described below with reference to the drawings. In the following, portions common to the related art are denoted by the same reference numerals, and redundant description is omitted.

【0023】図4は、本発明に係る光書込ユニットの一
実施形態を示す分解斜視図である。この図4は、光学ハ
ウジング3のポリゴンモータ装着部である隔壁13の有
る側から描いてあり、光学ハウジング3の側面に開口部
21を設け、ポリゴンモータ5が光学ハウジング3の側
方から、光学ハウジング3にハウジングカバー4を装着
した状態で行えるようにしてある。
FIG. 4 is an exploded perspective view showing an embodiment of the optical writing unit according to the present invention. 4 is drawn from the side of the optical housing 3 where the partition 13 which is the polygon motor mounting portion is located. An opening 21 is provided on the side surface of the optical housing 3, and the polygon motor 5 is moved from the side of the optical housing 3 to the optical It can be performed with the housing 3 attached with the housing cover 4.

【0024】隔壁13には、ポリゴンモータ5の基板1
5を挟み込む上ガイドレール22、下ガイドレール23
が左右両側に設けてある。ガイドレール23は段差形状
になっており、ポリゴンモータ5の当接範囲19を所定
の位置で支える当接部24が片側に付き2ヶ所ずつ設け
てある。上ガイドレール22と当接部24の間隔は、基
板15の板厚より広く取ってあり、ポリゴンモータ5を
円滑に着脱ガイドすることができるようになっている。
ポリゴンモータ設置部の底面には、コの字型の形状のス
リーブ保持部材25が設けてある。
On the partition 13, the substrate 1 of the polygon motor 5 is
Upper guide rail 22 and lower guide rail 23 sandwiching 5
Are provided on both the left and right sides. The guide rail 23 has a stepped shape, and two contact portions 24 are provided on one side for supporting the contact range 19 of the polygon motor 5 at a predetermined position. The distance between the upper guide rail 22 and the contact portion 24 is wider than the thickness of the substrate 15 so that the polygon motor 5 can be smoothly guided in and out.
A U-shaped sleeve holding member 25 is provided on the bottom surface of the polygon motor installation portion.

【0025】図5は、開口部21を塞ぐ小カバー26の
背面側の形状を示す斜視図である。この図に示すよう
に、小カバー26には弾性変形する押圧部材27、28
が装備してある。小カバー26は、押圧部材27、28
が弾性変形できる必要から、樹脂一体成形品が好ましい
が、金属の板バネ材を押圧部材としてカバー体にネジ等
で装着する構成としても構わない。
FIG. 5 is a perspective view showing the shape of the small cover 26 closing the opening 21 on the back side. As shown in this figure, elastically deforming pressing members 27, 28 are provided on the small cover 26.
Is equipped. The small cover 26 includes pressing members 27 and 28
Since it is necessary to be able to elastically deform, a resin-integrated molded product is preferable. However, a configuration in which a metal leaf spring material is used as a pressing member and attached to a cover body with screws or the like may be used.

【0026】この実施形態におけるポリゴンモータ5の
位置決め及び固定について説明する。ポリゴンモータ5
を開口部21の奥まで挿入すると、底面側のスリーブ2
0がスリーブ保持部材25内に入り込んで突き当たる。
次に小カバー26を光学ハウジングに取り付ける。図6
は、ポリゴンモータ5の装着状態を上方、すなわちポリ
ゴンミラー8の側から見た平面図である。ポリゴンモー
タ軸と直交する方向(X、Y方向)の位置決めは、スリ
ーブ20がスリーブ保持部材25の3つの面に当接する
ことと、基板15の端面を小カバー26の押圧部材27
で押圧することで行っている。また図7は、ポリゴンモ
ータ5の装着状態を図6の側方、すなわちポリゴンミラ
ー8の側方から見た側面断面図である。ポリゴンモータ
軸方向(Z方向)の位置決めは、基板15の当接範囲1
9が下ガイドレール23の当接部24に当接することで
行い、固定は小カバー26に設けた押圧部材28によっ
て基板15を上から押さえつけることで行っている。コ
ネクタ17が開口部21に近接した位置になるようにポ
リゴンモータ5を設置し、小カバー26に設けた切り欠
き29からハーネス30を取り出している。
The positioning and fixing of the polygon motor 5 in this embodiment will be described. Polygon motor 5
Is inserted all the way into the opening 21, the sleeve 2 on the bottom side
0 enters the sleeve holding member 25 and hits it.
Next, the small cover 26 is attached to the optical housing. FIG.
Is a plan view of the mounting state of the polygon motor 5 as viewed from above, that is, from the polygon mirror 8 side. Positioning in the direction (X, Y directions) orthogonal to the polygon motor axis is performed by the sleeve 20 being in contact with the three surfaces of the sleeve holding member 25 and the end surface of the substrate 15 being pressed by the pressing member 27 of the small cover 26.
It is done by pressing with. 7 is a side sectional view of the mounted state of the polygon motor 5 as viewed from the side in FIG. 6, that is, from the side of the polygon mirror 8. FIG. Positioning of the polygon motor in the axial direction (Z direction) is performed according to the contact area 1 of the substrate 15.
9 is brought into contact with the contact portion 24 of the lower guide rail 23, and is fixed by pressing the substrate 15 from above with a pressing member 28 provided on the small cover 26. The polygon motor 5 is installed so that the connector 17 is located at a position close to the opening 21, and the harness 30 is taken out from the notch 29 provided in the small cover 26.

【0027】図8は、本発明に係る光書込ユニットの他
の実施形態を示す斜視図である。この実施形態では、光
学ハウジング3は樹脂成形品であり、当接部24に対向
する形で配置した押圧部材31を一体成形してある。押
圧部材31は、先の実施形態の押圧部材28に相当する
機能を持ち、弾性変形して基板15を上方から押圧し、
Z方向の固定を行う。
FIG. 8 is a perspective view showing another embodiment of the optical writing unit according to the present invention. In this embodiment, the optical housing 3 is a resin molded product, and a pressing member 31 arranged to face the contact portion 24 is integrally formed. The pressing member 31 has a function corresponding to the pressing member 28 of the previous embodiment, elastically deforms and presses the substrate 15 from above,
Fix in the Z direction.

【0028】なお上述してきた実施形態は一例であり、
例えば当接部24とスリーブ保持部材25の形状には様
々なものが考えられる。両者はポリゴンモータ5のX、
Y、Z方向の位置決めが行える機能を有すれば、特に図
示の実施形態の形状のものに限られない。当接部24の
数や配置についても、ポリゴンモータ5のZ方向の位置
決めが行えるのであれば四隅でなくとも構わない。また
ポリゴンモータ5の固定を行う押圧部材が、光学ハウジ
ング3や小カバー26とは別体で、板バネやポリアセタ
ール樹脂等の弾性率の高い部材を用いる構成でもよい。
さらにキー形状等の固定部材やネジ等の締結部材を用い
る構成でも採用できる。
The embodiment described above is an example,
For example, various shapes can be considered for the shape of the contact portion 24 and the sleeve holding member 25. Both are X of polygon motor 5,
The shape is not particularly limited to the shape of the illustrated embodiment as long as it has a function of performing positioning in the Y and Z directions. The number and arrangement of the contact portions 24 may not be four corners as long as the polygon motor 5 can be positioned in the Z direction. Further, the pressing member for fixing the polygon motor 5 may be configured separately from the optical housing 3 and the small cover 26 and using a member having a high elastic modulus such as a leaf spring or polyacetal resin.
Further, a configuration using a fixing member such as a key or a fastening member such as a screw can be adopted.

【0029】[0029]

【発明の効果】本発明の請求項1の光書込ユニットは、
以上説明してきたように、光偏向装置の着脱が回転多面
鏡の軸と直交する方向から行えるので、画像形成装置か
ら光書込ユニット全体を外したり、光学ハウジングカバ
ーを外したりといった手順を踏まずに光偏向装置の交換
を極めて容易に行えるという効果がある。
According to the optical writing unit of the first aspect of the present invention,
As described above, since the attachment / detachment of the light deflecting device can be performed from the direction orthogonal to the axis of the rotary polygon mirror, the procedure of removing the entire optical writing unit from the image forming apparatus or removing the optical housing cover is not performed. This has the effect that the light deflection device can be replaced very easily.

【0030】請求項2の光書込ユニットは、以上説明し
てきたように、光学箱に光偏向装置を着脱するためのガ
イド手段を設けているので、上記共通の効果に加え、着
脱時に起こるポリゴンミラーへの汚れの付着や傷の発
生、あるいは落下による破損といった危険性を低くし、
作業がさらに容易に行えるようになるという効果があ
る。
According to the optical writing unit of the second aspect, as described above, since the optical box is provided with the guide means for attaching / detaching the optical deflecting device, in addition to the above-mentioned common effects, the polygon generated at the time of attaching / detaching is provided. Reduces the danger of dirt on mirrors, scratches, or damage due to falling,
There is an effect that work can be performed more easily.

【0031】請求項3の光書込ユニットは、以上説明し
てきたように、光学箱が光偏向装置の着脱のための開口
部とそれを覆うカバーを備え、このカバーを取り付ける
ことで光偏向装置の固定が自ずと行えるので、上記共通
の効果に加え、着脱作業が容易であり、締結、固定部材
が別途必要でないので、工具を用いる作業が最少で済
み、構成が簡単で低コストなのもにできるという効果が
ある。
According to a third aspect of the present invention, as described above, the optical box includes the opening for attaching and detaching the optical deflector and a cover for covering the same. In addition to the above-mentioned common effects, the attachment and detachment work is easy, and fastening and fixing members are not separately required, so that the work using tools is minimized, and the structure can be simplified and the cost can be reduced. This has the effect.

【0032】請求項4の光書込ユニットは、以上説明し
てきたように、光偏向装置の着脱部位が光学箱の開口部
に最も近接した位置になる向きとしたので、上記共通の
効果に加え、ハーネスの取り廻しが簡素化でき、光偏向
装置の着脱時にポリゴンミラーが作業者から最も遠い位
置になるので、過ってポリゴンミラーを汚すといった不
具合を減らすことができるという効果がある。
In the optical writing unit according to the fourth aspect, as described above, the attachment / detachment portion of the optical deflecting device is oriented so as to be closest to the opening of the optical box. In addition, the arrangement of the harness can be simplified, and since the polygon mirror is located farthest from the worker when the optical deflecting device is attached or detached, there is an effect that problems such as excessively staining the polygon mirror can be reduced.

【0033】請求項5の光書込ユニットは、以上説明し
てきたように、光学箱の光偏向装置の着脱部位に基板の
底面を支持する部材及び基板底面のスリーブの外周を保
持する部材を有するので、上記共通の効果に加え、光偏
向装置の位置決めが確実に行えるという効果がある。
As described above, the optical writing unit according to the fifth aspect has a member for supporting the bottom surface of the substrate and a member for holding the outer periphery of the sleeve on the bottom surface of the substrate at the attachment / detachment site of the optical deflector of the optical box. Therefore, in addition to the above-mentioned common effect, there is an effect that the positioning of the optical deflecting device can be surely performed.

【0034】請求項6の光書込ユニットは、以上説明し
てきたように、光学箱が光偏向装置の着脱部位に、光偏
向装置の基板を押圧する部材を備えるので、上記共通の
効果に加え、光偏向装置の基板を締結、固定する部材を
別途に必要とすることがなく、工具を用いる作業が最少
で済み、工具によってポリゴンミラーに傷つけることが
なく、さらに光偏向装置をセットしたと同時に光偏向装
置の固定が確実に行えるという効果がある。
According to the optical writing unit of the sixth aspect, as described above, the optical box is provided with the member for pressing the substrate of the optical deflector at the attachment / detachment portion of the optical deflector. There is no need for a separate member for fastening and fixing the substrate of the light deflecting device, the work using a tool is minimal, and the polygon mirror is not damaged by the tool. There is an effect that the light deflecting device can be securely fixed.

【0035】請求項7の光書込ユニットは、以上説明し
てきたように、光学箱が押圧部材を一体成形した樹脂成
形品であるので、上記請求項6の光書込ユニットと共通
の効果に加え、部品点数が増加することなく、低コスト
で提供できるものになるという効果がある。
According to the optical writing unit of claim 7, as described above, since the optical box is a resin molded article in which the pressing member is integrally formed, the optical writing unit has the same effects as those of the optical writing unit of claim 6. In addition, there is an effect that it can be provided at low cost without increasing the number of parts.

【図面の簡単な説明】[Brief description of the drawings]

【図1】基板一体型ポリゴンモータを装備した光書き込
みユニットの構造を示す平面図(A)と側面断面図
(B)である。
FIG. 1 is a plan view (A) and a side sectional view (B) showing the structure of an optical writing unit equipped with a substrate-integrated polygon motor.

【図2】市場で多く使われているタイプの基板一体型ポ
リゴンモータの構成を示す斜視図である。
FIG. 2 is a perspective view showing a configuration of a board-integrated polygon motor of a type often used in the market.

【図3】図2に示すタイプの基板一体型ポリゴンモータ
の位置決め及び固定のための部分を示す斜視図である。
3 is a perspective view showing a portion for positioning and fixing a substrate-integrated polygon motor of the type shown in FIG. 2;

【図4】本発明に係る光書込ユニットの一実施形態を示
す分解斜視図である。
FIG. 4 is an exploded perspective view showing an embodiment of the optical writing unit according to the present invention.

【図5】図4の光書込ユニットの開口部を塞ぐ小カバー
の背面側の形状を示す斜視図である。
FIG. 5 is a perspective view showing the shape of the back side of a small cover closing an opening of the optical writing unit of FIG. 4;

【図6】図4の光書込ユニットにおけるポリゴンモータ
の装着状態の平面図である。
FIG. 6 is a plan view of the optical writing unit of FIG. 4 in a state where a polygon motor is mounted.

【図7】同側面断面図である。FIG. 7 is a side sectional view of the same.

【図8】本発明に係る光書込ユニットの他の実施形態を
示す斜視図である。
FIG. 8 is a perspective view showing another embodiment of the optical writing unit according to the present invention.

【符号の説明】[Explanation of symbols]

1 画像形成装置 2 光書込ユニット 3 光学ハウジング 4 ハウジングカバー 5 ポリゴンモータ 6 レーザー発振ユニット 7 シリンダレンズ 8 ポリゴンミラー 9 fθレンズ 10 長尺レンズ 11 防塵ガラス 12 感光体 13 隔壁 14 防音ガラス 15 基板 16 ドライバIC 17 コネクタ 18 ネジ穴 19 当接範囲 20 スリーブ 21 開口部 22 上ガイドレール 23 下ガイドレール 24 当接部 25 スリーブ保持部材 26 小カバー 27、28 押圧部材 30 ハーネス 31 押圧部材 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Optical writing unit 3 Optical housing 4 Housing cover 5 Polygon motor 6 Laser oscillation unit 7 Cylinder lens 8 Polygon mirror 9 fθ lens 10 Long lens 11 Dustproof glass 12 Photoconductor 13 Partition wall 14 Soundproof glass 15 Substrate 16 Driver IC 17 connector 18 screw hole 19 contact area 20 sleeve 21 opening 22 upper guide rail 23 lower guide rail 24 contact part 25 sleeve holding member 26 small cover 27, 28 pressing member 30 harness 31 pressing member

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 回転多面鏡と、該回転多面鏡の電気的駆
動部分を板状の基板の上に一体に備える光偏向装置と、
光ビーム発生手段から出射された光ビームを偏向し、該
偏向した光ビームを結像する光学系等とを光学箱の中に
備えてなる光書込ユニットにおいて、上記光偏向装置の
着脱を上記回転多面鏡の軸と直交する方向から可能とす
る着脱部位を上記光学箱に設けてなることを特徴とする
光書込ユニット。
An optical deflecting device comprising: a rotary polygon mirror; and an electric drive portion of the rotary polygon mirror integrated on a plate-like substrate.
In an optical writing unit having an optical system for deflecting a light beam emitted from a light beam generating means and forming an image of the deflected light beam in an optical box, the attachment / detachment of the light deflecting device is performed as described above. An optical writing unit, characterized in that the optical box is provided with a detachable part which can be mounted in a direction perpendicular to the axis of the rotary polygon mirror.
【請求項2】 上記光学箱の上記着脱部位の内側に、上
記光偏向装置を着脱するためのガイド手段を設けてなる
ことを特徴とする請求項1の光書込ユニット。
2. An optical writing unit according to claim 1, wherein a guide means for attaching and detaching said optical deflector is provided inside said attaching and detaching portion of said optical box.
【請求項3】 上記着脱部位が、上記光学箱内への上記
光偏向装置の装着及び該装着状態の上記光偏向装置の取
り出しのための開口部と、該開口部を覆うカバーとを備
え、該カバーが上記光偏向装置の固定手段を兼ねること
を特徴とする請求項1または2の光書込ユニット。
3. An attaching / detaching portion includes an opening for mounting the light deflector in the optical box and taking out the light deflector in the mounted state, and a cover covering the opening. 3. The optical writing unit according to claim 1, wherein said cover also serves as fixing means for said optical deflector.
【請求項4】 上記着脱部位が、上記光偏向装置の着脱
用の開口部を備え、上記光偏向装置の設置方向を、該光
偏向装置のハーネス取付部が上記開口部に最も近接した
位置になる向きとしてなることを特徴とする請求項1な
いし3のいずれかの光書込ユニット。
4. The light deflecting device has an opening for attachment and detachment of the light deflecting device, and an installation direction of the light deflecting device is set to a position where a harness mounting portion of the light deflecting device is closest to the opening. The optical writing unit according to any one of claims 1 to 3, wherein the optical writing unit has an orientation.
【請求項5】 上記光偏向装置の設置基準が、上記回転
多面鏡の軸方向については上記基板の底面の所定の範囲
を支持して行い、上記回転多面鏡の軸と直交する方向に
ついては、該回転多面鏡の軸を保持しかつ上記基板の底
面に突出した円柱状のスリーブの外周を嵌合することで
行うものであり、上記着脱部位に上記基板の底面を支持
する部材及び上記スリーブの外周を保持する部材を有す
ることを特徴とする請求項1ないし4のいずれかの光書
込ユニット。
5. An installation standard of the optical deflector is such that a predetermined range of a bottom surface of the substrate is supported in an axial direction of the rotary polygon mirror, and in a direction orthogonal to an axis of the rotary polygon mirror, This is performed by fitting the outer periphery of a cylindrical sleeve that holds the axis of the rotating polygon mirror and protrudes from the bottom surface of the substrate, and a member that supports the bottom surface of the substrate at the attachment / detachment site and the sleeve. 5. The optical writing unit according to claim 1, further comprising a member for holding an outer periphery.
【請求項6】 上記光学箱が、上記着脱部位に上記基板
を押圧する部材を備えることを特徴とする請求項1ない
し5のいずれかの光書込ユニット。
6. The optical writing unit according to claim 1, wherein the optical box includes a member for pressing the substrate at the attachment / detachment site.
【請求項7】 上記光学箱が上記押圧部材を一体成形し
た樹脂成形品であることを特徴とする請求項6の光書込
ユニット。
7. The optical writing unit according to claim 6, wherein the optical box is a resin molded product obtained by integrally molding the pressing member.
JP2000250112A 2000-08-21 2000-08-21 Optical writing unit Pending JP2002062503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000250112A JP2002062503A (en) 2000-08-21 2000-08-21 Optical writing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000250112A JP2002062503A (en) 2000-08-21 2000-08-21 Optical writing unit

Publications (1)

Publication Number Publication Date
JP2002062503A true JP2002062503A (en) 2002-02-28

Family

ID=18739746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000250112A Pending JP2002062503A (en) 2000-08-21 2000-08-21 Optical writing unit

Country Status (1)

Country Link
JP (1) JP2002062503A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294313A (en) * 2008-06-03 2009-12-17 Ricoh Co Ltd Image forming apparatus
JP2010097119A (en) * 2008-10-20 2010-04-30 Ricoh Co Ltd Laser scanner and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294313A (en) * 2008-06-03 2009-12-17 Ricoh Co Ltd Image forming apparatus
JP2010097119A (en) * 2008-10-20 2010-04-30 Ricoh Co Ltd Laser scanner and image forming apparatus

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