JPH04110912A - Scanning optical device - Google Patents

Scanning optical device

Info

Publication number
JPH04110912A
JPH04110912A JP23117090A JP23117090A JPH04110912A JP H04110912 A JPH04110912 A JP H04110912A JP 23117090 A JP23117090 A JP 23117090A JP 23117090 A JP23117090 A JP 23117090A JP H04110912 A JPH04110912 A JP H04110912A
Authority
JP
Japan
Prior art keywords
housing
shafts
scanning
positioning
scanning 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
Application number
JP23117090A
Other languages
Japanese (ja)
Inventor
Ryosuke Kako
加来 亮介
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP23117090A priority Critical patent/JPH04110912A/en
Publication of JPH04110912A publication Critical patent/JPH04110912A/en
Pending legal-status Critical Current

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  • Mechanical Optical Scanning Systems (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To facilitate the assembly by fitting plural units to housings respectively and arranging those housing in specific order. CONSTITUTION:The position of a light beam perpendicular to the optical center of a scanning surface is determined by the fitting of two shafts 15 to the respective housings 11 - 14. Further, for the axial positioning of the shafts 15, a reference positioning member 17 is fixed with setscrews to positions close to end parts of the shafts 15, the housing are arranged in abutting states in order from the 1st housing 11, and a member similar to the member 17 is pressed from the other end parts and fixed to expand a scanning optical system on the same plane. Positioning between a scanning unit and a drum 5 is therefore performed with the shafts 15. Consequently, the labor for the machining process and inspecting process of an optical box can be saved.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、レーザービームプリンタ、レーザー複写機等
に使用される走査光学装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scanning optical device used in laser beam printers, laser copying machines, and the like.

[従来の技術] 第4図は回転多面鏡を利用して偏向走査する走査光学装
置の従来例である。コリメートレンズ、半導体レーザー
及びこれらを保持する部材から成るレーザーユニット1
は光学箱2の側壁に取り付けられており、光学箱2の底
板に設けられた高速回転モータによって回転多面鏡3が
回転するようにされている。fθレンズ4.5を構成す
る単レンズ群は光学箱2の内底に設けられている位置決
め基準にならって接着或いはばね押さえ等により固定さ
れている。レーザーユニット1から出射され、回転多面
鏡3、fθレンズ4.5を経た光ビームは感光ドラム6
上で走査線りにより結像する。なお、7は書き出し信号
の反射ミラー、8は同信号を読み込むセンサである。
[Prior Art] FIG. 4 shows a conventional example of a scanning optical device that performs deflection scanning using a rotating polygon mirror. Laser unit 1 consisting of a collimating lens, a semiconductor laser, and a member that holds them
is attached to the side wall of the optical box 2, and the rotating polygon mirror 3 is rotated by a high-speed rotation motor provided on the bottom plate of the optical box 2. The single lens group constituting the f.theta. lens 4.5 is fixed by adhesive or spring presser according to a positioning reference provided on the inner bottom of the optical box 2. A light beam emitted from the laser unit 1 and passed through the rotating polygon mirror 3 and the fθ lens 4.5 is directed to the photosensitive drum 6.
An image is formed on the top using a scanning line. Note that 7 is a reflecting mirror for the write signal, and 8 is a sensor for reading the same signal.

このような走査光学装置の場合に、光学箱2から出射す
る走査線りを感光ドラム6の回転軸に対して平行に傾き
なく照射させるために、光学箱2は本体フレーム9に取
り付ける際にスペーサ10により全体の傾きを調整して
いる。
In the case of such a scanning optical device, in order to irradiate the scanning line emitted from the optical box 2 parallel to the rotation axis of the photosensitive drum 6 without tilting, the optical box 2 is attached to the main body frame 9 using a spacer. 10 to adjust the overall inclination.

[発明が解決しようとする課題] しかしながら、上述の従来例では光学部品の位置精度、
例えば回転多面鏡3とfθレンズ4.5との相対位置、
fθレンズ4.5同志の相対位置、反射ミラー7及びセ
ンサ8の位置の制約が厳しく、1つの光学箱2内にこれ
らの位置決め部を設けなければならず、加工、検査及び
歩留向上が困難となっているのが現状である。また、光
学箱2内の位置決め精度とは別に、本体において板金フ
レーム等の構成により精度が出せない場合に、本体搭載
後に走査線りの位置、曲り、傾きの調整が必要となる。
[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, the positional accuracy of optical components,
For example, the relative position between the rotating polygon mirror 3 and the fθ lens 4.5,
There are severe restrictions on the relative positions of the fθ lenses 4 and 5, and the positions of the reflecting mirror 7 and sensor 8, and these positioning sections must be provided within one optical box 2, making processing, inspection, and yield improvement difficult. This is the current situation. In addition to the positioning accuracy within the optical box 2, if accuracy cannot be achieved due to the structure of the main body, such as a sheet metal frame, it is necessary to adjust the position, bend, and inclination of the scanning line after mounting the main body.

更に、このとき本体に対して走査ユニットの互換性が得
られない欠点もある。
Furthermore, there is also the disadvantage that the scanning unit cannot be interchanged with the main body.

一方、近年のレーザービームプリンタは紙サイズ、解像
度、出力枚数等が異なるものが多機種販売されるように
なり、その度ごとに光学箱2を製作し直すこととなり、
部品単位の流用は可能としてもユニットの互換性は困難
で、組み換え構成等は殆ど行われていない。
On the other hand, in recent years, many types of laser beam printers have been sold with different paper sizes, resolutions, number of output sheets, etc., and the optical box 2 has to be remanufactured each time.
Even if parts can be reused, interchangeability of units is difficult, and recombinant configurations are rarely performed.

本発明の目的は、上述の欠点を解消し、複数個のユニッ
トに分割し、ユニットごとに各ハウジングに正確に取り
付け、ハウジングを規則的に結合することにより、正確
にかつ簡便に組立てできるようにした走査光学装置を提
供することにある。
An object of the present invention is to solve the above-mentioned drawbacks, to divide the unit into a plurality of units, to accurately attach each unit to each housing, and to connect the housings regularly, so that assembly can be performed accurately and easily. It is an object of the present invention to provide a scanning optical device that has the following features.

[課題を解決するための手段] 上述の目的を達成するために、本発明に係る走査光学装
置においては、走査光学系を構成する部品を搭載する光
学ハウジングを複数個のユニットに分割し、前記各ハウ
ジングには光学部品をユニット単位で配設し、前記各ハ
ウジングを案内部材に沿って順次に並べて前記走査光学
系の配置を行うことを特徴とするものである。
[Means for Solving the Problems] In order to achieve the above-mentioned object, in the scanning optical device according to the present invention, the optical housing in which the components constituting the scanning optical system are mounted is divided into a plurality of units, and the The scanning optical system is characterized in that optical components are arranged in units in each housing, and the scanning optical system is arranged by sequentially arranging the housings along a guide member.

[作用] 上述の構成を有する走査光学装置は、複数個のユニット
のユニットをそれぞれハウジングに取り付け、これらの
ハウジングを所定の順序に従って並べることにより組立
てを完了する。
[Operation] The scanning optical device having the above-described configuration is assembled by attaching a plurality of units to respective housings and arranging these housings in a predetermined order.

[実施例] 本発明を第1図〜第3図に〆示の実施例に基づいて詳細
に説明する。なお、第4図と同一の符号は同一の部材を
表している。
[Example] The present invention will be explained in detail based on the example shown in FIGS. 1 to 3. Note that the same reference numerals as in FIG. 4 represent the same members.

第1図は第1の実施例の構成図であり、半導体レーザー
光源、コリメートレンズユニットを含む平行光を発する
レーザーユニット1、スキャナモータ、回転多面M3は
第1のハウジング11に正確な位置決めを行い固定され
ている。一般的な走査光学系では、fθレンズ4.5の
うちレンズ4は球面レンズ、レンズ5はトーリックレン
ズで構成されている。これらの単レンズ4.5はそれぞ
れ第2のハウジング12、第3のハウジング13に接着
等によって同定されている。このとき、ハウジング12
.13には後にハウジング12.13を結合したときに
1つの走査光学系が完成するように、各単レンズ4.5
を配置するときの位置基準12a、13aが設けられて
おり、単レンズ4.5を固定する時はそれぞれ位置基準
12a、13aにならって行うようになっている。書き
出し信号の折り返し反射ミラー7、書き出し信号を受光
するセンサ8は第4のハウジング14に同様に固定され
、反射ミラー7、センサ8は後にハウジング14を結合
した時に走査線りの書き出し信号を取り込める位置に基
準を設けて、この基準に従って配置されている。ただし
、センサ8の受光部は一般に小さいことから、反射ミラ
ー7は調整範囲で可動としておき、後にレザー光を発光
させセンサ8に入光するように調整し固定してもよい。
FIG. 1 is a configuration diagram of the first embodiment, in which a semiconductor laser light source, a laser unit 1 that emits parallel light including a collimating lens unit, a scanner motor, and a rotating polygon M3 are accurately positioned in a first housing 11. Fixed. In a general scanning optical system, among the fθ lenses 4.5, lens 4 is composed of a spherical lens, and lens 5 is composed of a toric lens. These single lenses 4.5 are attached to the second housing 12 and the third housing 13, respectively, by adhesion or the like. At this time, the housing 12
.. 13 includes each single lens 4.5 so that one scanning optical system is completed when the housing 12.13 is later combined with the housing 12.13.
Positional references 12a and 13a are provided for positioning the single lens 4.5, and the single lens 4.5 is fixed following the positioning references 12a and 13a, respectively. A reflection mirror 7 for returning the write signal and a sensor 8 for receiving the write signal are similarly fixed to the fourth housing 14, and the reflection mirror 7 and the sensor 8 are positioned at positions where they can receive the scan line write signal when the housing 14 is later combined. A standard has been set for the site, and the locations are arranged according to this standard. However, since the light receiving section of the sensor 8 is generally small, the reflecting mirror 7 may be made movable within an adjustment range, and later adjusted and fixed so that the laser light is emitted and enters the sensor 8.

また、感光ドラム6に対して直角をなす角度でこれらの
シャフト15が平行に配置されており、これらのシャフ
ト15で形成される平面が感光ドラム6に対して正確に
直角になるように、シャフト15は固定部材16により
プリンタ本体に固定されている。
Further, these shafts 15 are arranged parallel to each other at an angle perpendicular to the photosensitive drum 6, and the shafts 15 are arranged in parallel so that the plane formed by these shafts 15 is exactly at right angles to the photosensitive drum 6. 15 is fixed to the printer main body by a fixing member 16.

第1から第4までのハウジング11〜14は嵌合穴又は
切欠部を有し、2本のシャフト15に取り付く構造とな
っている。そして、光ビームの走査面の光学中心に直角
な方向の位置決めは2本のシャフト15の各ハウジング
11〜14に対する取り付けによって決定される。また
、シャフト15の軸方向に対する位置決めはシャフト1
5の端部に近い個所に位置決め基準となる部材17をセ
ットビス等で固定し、第1ハウジング11がら順に突き
当てて並べ、他方の端部から部材17と同様の部材によ
って押し付けて固定することによリ、同一平面上に走査
光学系が展開される。
The first to fourth housings 11 to 14 have fitting holes or cutouts, and are structured to be attached to the two shafts 15. The positioning of the scanning plane of the light beam in the direction perpendicular to the optical center is determined by the attachment of the two shafts 15 to each of the housings 11 to 14. Further, the positioning of the shaft 15 in the axial direction is performed by
A member 17 serving as a positioning reference is fixed with a set screw or the like at a location near the end of the first housing 11, and the first housing 11 is lined up in order, and the member 17 is pressed and fixed from the other end with a member similar to the member 17. Accordingly, the scanning optical system is developed on the same plane.

第2図は第2の実施例を示し、支持シャフト15の感光
ドラム6寄りの固定部材16aが、感光ドラム6の主軸
受けと兼ねるようにされている。
FIG. 2 shows a second embodiment, in which a fixing member 16a of the support shaft 15 closer to the photosensitive drum 6 also serves as the main bearing of the photosensitive drum 6.

このような構成にすることにより、走査ユニットとドラ
ム6間の位置出しもシャフト15により行うことが可能
となり、固定部材16aを水平面に固定することにより
、従来例で課題となっていた走査線の位置調整、傾き調
整が簡略化できる。
With this configuration, it becomes possible to perform positioning between the scanning unit and the drum 6 using the shaft 15, and by fixing the fixing member 16a on a horizontal surface, it is possible to fix the scanning line, which was a problem in the conventional example. Position adjustment and tilt adjustment can be simplified.

第3図は第3の実施例を示し、先の2つの実施例が丸棒
シャフト15により支持するのに対して、この第3の実
施例の場合は直動型のスライドガイド18.18を利用
している。スライドガイド18はシャフト15に比べて
剛性が高く、組立時の摺動性が良く、汎用品の利用が可
能である。
FIG. 3 shows a third embodiment, and while the previous two embodiments are supported by a round bar shaft 15, this third embodiment has a linear slide guide 18.18. We are using. The slide guide 18 has higher rigidity than the shaft 15, has good sliding properties during assembly, and can be used as a general-purpose product.

なお、各ハウジング11〜14の連結、位置決めについ
ては上述の方法以外にも種々考えられる。
In addition, various methods other than the above-mentioned method can be considered for connection and positioning of each housing 11 to 14.

[発明の効果] 以上説明したように本発明に係る走査光学装置は、光学
中心に対して直角な方向に複数個のノ\ウジングに分割
し、これらのハウジングが感光ドラムに対して直角な方
向に位置決めされた案内部材に倣って結合することlこ
より、各部に多くの位置決め機能を有する光学箱の加工
工程、検査工程の省力化が可能となり、組立てにおいて
もガイドに沿って突き当てるだけで、光学系を構成でき
る利点がある。
[Effects of the Invention] As explained above, the scanning optical device according to the present invention is divided into a plurality of housings in a direction perpendicular to the optical center, and these housings are divided into a plurality of housings in a direction perpendicular to the photosensitive drum. By joining the optical box following the guide members positioned in the position, it is possible to save labor in the processing and inspection process of the optical box, which has many positioning functions in each part. It has the advantage of being able to configure an optical system.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は第1図〜第3図は本発明に係る走査光学装置の実
施例を示し、第1図〜第3図はそれぞれ第1〜第3の実
施例の斜視図であり、第4図は従来例の斜視図である。 符号1はレーザーユニット、3は回転多面鏡、4.5は
fθレンズ、6は感光ドラム、7は反射ミラー、8はセ
ンサ、11〜14はハウジング、15はシャフト、16
はシャフト固定部材、18はスライドガイドである。
In the drawings, FIGS. 1 to 3 show embodiments of the scanning optical device according to the present invention, FIGS. 1 to 3 are perspective views of the first to third embodiments, respectively, and FIG. It is a perspective view of a conventional example. 1 is a laser unit, 3 is a rotating polygon mirror, 4.5 is an fθ lens, 6 is a photosensitive drum, 7 is a reflective mirror, 8 is a sensor, 11 to 14 are housings, 15 is a shaft, 16
18 is a shaft fixing member, and 18 is a slide guide.

Claims (1)

【特許請求の範囲】[Claims] 1、走査光学系を構成する部品を搭載する光学ハウジン
グを複数個のユニットに分割し、前記各ハウジングには
光学部品をユニット単位で配設し、前記各ハウジングを
案内部材に沿って順次に並べて前記走査光学系の配置を
行うことを特徴とする走査光学装置。
1. An optical housing in which components constituting a scanning optical system are mounted is divided into a plurality of units, each housing is provided with optical components in units, and each housing is sequentially arranged along a guide member. A scanning optical device characterized by arranging the scanning optical system.
JP23117090A 1990-08-31 1990-08-31 Scanning optical device Pending JPH04110912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23117090A JPH04110912A (en) 1990-08-31 1990-08-31 Scanning optical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23117090A JPH04110912A (en) 1990-08-31 1990-08-31 Scanning optical device

Publications (1)

Publication Number Publication Date
JPH04110912A true JPH04110912A (en) 1992-04-13

Family

ID=16919412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23117090A Pending JPH04110912A (en) 1990-08-31 1990-08-31 Scanning optical device

Country Status (1)

Country Link
JP (1) JPH04110912A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7791633B2 (en) 2005-05-19 2010-09-07 Sharp Kabushiki Kaisha Optical scanning unit and image forming apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7791633B2 (en) 2005-05-19 2010-09-07 Sharp Kabushiki Kaisha Optical scanning unit and image forming apparatus

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