JP2002182141A - Multibeam scanner - Google Patents
Multibeam scannerInfo
- Publication number
- JP2002182141A JP2002182141A JP2000380555A JP2000380555A JP2002182141A JP 2002182141 A JP2002182141 A JP 2002182141A JP 2000380555 A JP2000380555 A JP 2000380555A JP 2000380555 A JP2000380555 A JP 2000380555A JP 2002182141 A JP2002182141 A JP 2002182141A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- source unit
- housing
- fixing member
- beam scanning
- 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
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、レーザープリンタ
等の光書込ユニットにおけるマルチビーム走査装置に関
し、特にその取付構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-beam scanning device in an optical writing unit such as a laser printer, and more particularly to a mounting structure for the device.
【０００２】[0002]
【従来の技術】一般に、レーザビームプリンタや、デジ
タル複写機などの光書込装置では、高密度化、あるいは
高速化を達成するために、従来ではその偏光手段である
ポリゴンスキャナの回転速度を高速にすることによって
行われてきた。しかしながら、ポリゴンスキャナの回転
速度を速くすると、ポリゴンスキャナの寿命を短くした
り、また、それに伴い、騒音・振動の発生を引き起こす
こととなり、限界がある。そこで、２つ以上の光源を用
い、ポリゴンスキャナの１面により１度に２本以上のビ
ームを走査することを可能にするマルチビーム走査装置
が知られている。この技術を用いることによって、ポリ
ゴンスキャナの回転数を速くすることなく高密度化、あ
るいは書込み速度の高速化を図ることができる。2. Description of the Related Art Generally, in an optical writing device such as a laser beam printer or a digital copying machine, the rotation speed of a polygon scanner, which is a polarizing means, is conventionally increased to achieve high density or high speed. Has been done by However, if the rotation speed of the polygon scanner is increased, the life of the polygon scanner is shortened, and noise and vibrations are generated, which is a limitation. Therefore, there is known a multi-beam scanning apparatus which can scan two or more beams at a time by one surface of a polygon scanner using two or more light sources. By using this technique, it is possible to increase the density or increase the writing speed without increasing the rotation speed of the polygon scanner.
【０００３】かかるマルチビーム走査装置における従来
技術として、例えば特開平９−１２７４４１号公報が知
られている。この技術においては、図３に示すように光
源１−１、１−２と、光源１−１、１−２をそれぞれ支
持するホルダ２−１、２−２と、コリメートレンズ３−
１、３−２を取付ける基体９と、２本のビームを合成す
るプリズム１０と、プリズム１０を保持するフランジ１
１と、２つのビーム間の副走査ピッチを調整する為の角
度設定部材１２により構成されている。[0003] As a prior art in such a multi-beam scanning apparatus, for example, Japanese Patent Application Laid-Open No. 9-127441 is known. In this technique, as shown in FIG. 3, light sources 1-1 and 1-2, holders 2-1 and 2-2 respectively supporting light sources 1-1 and 1-2, and a collimating lens 3-
A base 9 on which 1, 3-2 are mounted, a prism 10 for combining two beams, and a flange 1 for holding the prism 10
1 and an angle setting member 12 for adjusting the sub-scanning pitch between the two beams.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来例では、ビーム合成プリズム１０を保持するフランジ
部材１１、光源１−１、１−２であるＬＤを保持する支
持体２−１、２−２、コリメータレンズ３−１、３−２
を取付ける基体９、また、２ビーム間の副走査ピッチを
調整するための角度設定部材１２を各々組合せて構成さ
れているので、多くの部品を必要とし、組付工数が増大
してしまうばかりでなく、各々の位置決めを非常に正確
に出す必要が有り、高い加工精度を要求されると共に、
大幅なコストアップを引き起こしてしまう。However, in the above conventional example, the flange member 11 for holding the beam combining prism 10 and the supports 2-1 and 2-2 for holding LDs as the light sources 1-1 and 1-2. , Collimator lenses 3-1 and 3-2
Since the mounting base 9 and the angle setting member 12 for adjusting the sub-scanning pitch between the two beams are combined with each other, many parts are required and the number of assembling steps is increased. It is necessary to obtain each positioning very accurately, and high processing accuracy is required,
It causes a significant cost increase.
【０００５】また、他のマルチビーム走査装置の従来技
術として、特開平１１−６４７６５号公報には簡便な回
転調整によりレーザスポット光の間隔を調整する構造と
して、複数の光源を有する光源ユニットを書込ハウジン
グにネジ止めすることにより、固定する方法が提案され
ている。しかしながら、一般に、光源であるＬＤは、非
常に壊れやすい部品であり、僅かな衝撃、あるいは静電
気などで直ちに劣化あるいは破損してしまう。そのた
め、万一光源が壊れた場合において、光源部のみ簡単に
取り外し、交換できる構成が要求される。As another prior art of a multi-beam scanning apparatus, Japanese Patent Application Laid-Open No. H11-64765 describes a light source unit having a plurality of light sources as a structure for adjusting the interval between laser spot lights by simple rotation adjustment. There has been proposed a method of fixing the housing by screwing the housing. However, in general, the LD, which is a light source, is a very fragile component, and is immediately degraded or damaged by a slight impact or static electricity. Therefore, in the event that the light source is broken, it is required that only the light source can be easily removed and replaced.
【０００６】かかる、従来技術においては、光源ユニッ
トを書込ハウジングにネジ止めする構成である為、ハウ
ジング材質が樹脂で有った場合は、何度も交換作業を繰
返しているうちにネジ部が損傷してしまい、上手く取付
かなくなる可能性がある。また、ネジの締め付け具合、
あるいは作業者による締め付け力のバラツキなどによっ
て、所定の位置に正確に取付けられない可能性があり、
その結果、光軸倒れ等の影響により所定のビームスポッ
ト径が得られなくなり、画像不良を引き起こす可能性が
ある。In the prior art, since the light source unit is screwed to the writing housing, if the housing material is made of resin, the threaded portion may be formed after repeated replacement work. It may be damaged and may not be installed properly. In addition, screw tightening condition,
Or there is a possibility that it may not be able to be accurately mounted at a predetermined position due to variations in the tightening force by the operator,
As a result, a predetermined beam spot diameter cannot be obtained due to the influence of the tilt of the optical axis or the like, which may cause an image defect.
【０００７】本発明は上記従来例の問題点に鑑み、構成
部品を極力減らし、簡素な構成でさらにＬＤが破損して
も光源ユニットを簡単に取り外し可能として交換できる
マルチビーム走査装置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 problems of the prior art, and has as its object to provide a multi-beam scanning apparatus capable of reducing the number of components as much as possible, and having a simple structure, in which even if the LD is damaged, the light source unit can be easily removed and replaced. With the goal.
【０００８】[0008]
【課題を解決するための手段】第１の手段は上記目的を
達成するために、複数のレーザビームを出射する複数の
光源、及び前記複数の光源からのそれぞれの光束を平行
化する複数のコリメートレンズをホルダにより保持して
構成した光源ユニットと、前記光源ユニットを取付ける
ためのハウジングとを有し、前記光源ユニットを、前記
ハウジングに回動自在に取付けられた弾性の固定部材に
より押し付けて固定したことを特徴とする。A first means for achieving the above object is a plurality of light sources for emitting a plurality of laser beams, and a plurality of collimators for collimating respective light beams from the plurality of light sources. It has a light source unit configured by holding a lens with a holder, and a housing for mounting the light source unit, and the light source unit is pressed and fixed by an elastic fixing member rotatably mounted on the housing. It is characterized by the following.
【０００９】第２の手段は、第１の手段において固定部
材が、前記光源ユニットを中心として左右対称な位置に
前記ハウジングの上下部に引っかかるように、また、容
易に取り外し可能に取付けられていることを特徴とす
る。The second means is such that in the first means, the fixing member is attached to the upper and lower portions of the housing at positions symmetrical with respect to the light source unit, and is easily detachably attached. It is characterized by the following.
【００１０】第３の手段は、第２の手段において固定部
材が、前記ハウジングの上下部に引っ掛かけた位置を支
点に回動可能であることを特徴とする。[0010] The third means is characterized in that in the second means, the fixing member is rotatable about a position hooked on the upper and lower portions of the housing as a fulcrum.
【００１１】第４の手段は、第１、第２の手段において
固定部材が、線材の弾性力を利用して光源ユニットを保
持することを特徴とする。The fourth means is characterized in that in the first and second means, the fixing member holds the light source unit by utilizing the elastic force of the wire.
【００１２】[0012]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１は本発明に係るマルチビーム走査装置
の一実施形態を示す分解斜視図、図２は図１の光源ユニ
ットを詳しく示す側面図、図３は図２の光源ユニットと
比較した従来例を示す側面図、図４は図１のマルチビー
ム走査装置の組み立て工程を示す斜視図である。FIG. 1 is an exploded perspective view showing an embodiment of the multi-beam scanning device according to the present invention, FIG. 2 is a side view showing the light source unit of FIG. 1 in detail, and FIG. FIG. 4 is a side view showing an example, and FIG. 4 is a perspective view showing an assembling process of the multi-beam scanning device of FIG.
【００１４】図１、図２において、光源１−１、１−２
は、光源ユニット５の本体を構成するホルダ２に対して
その中心から対称な位置に圧入されている。光源１−
１、１−２からの光束はそれぞれ、同じくホルダ２に対
してその中心から対称な位置に接着されたコリメートレ
ンズ３−１、３−２によって平行化され、ハウジング８
の内部へ照射される。ホルダ２の中心には円筒形の凸部
５ａが形成され、凸部５ａがハウジング８の円筒形の開
口８ａに対して、ホルダ２の中心を軸として回動自在に
嵌合される。そして、ハウジング８に挿通された調整ネ
ジ６によって、ホルダ２を回動自在に回転させることが
でき、これにより、光源１−１、１−２からの副走査方
向のビームピッチを調整することができる。In FIGS. 1 and 2, light sources 1-1 and 1-2 are shown.
Are press-fitted into the holder 2 constituting the main body of the light source unit 5 at symmetrical positions from the center thereof. Light source 1
The light beams from the light sources 1 and 1-2 are collimated by the collimating lenses 3-1 and 3-2, which are also bonded to the holder 2 at symmetric positions from the center thereof, and the housing 8
Irradiated inside. A cylindrical protrusion 5 a is formed at the center of the holder 2, and the protrusion 5 a is rotatably fitted to the cylindrical opening 8 a of the housing 8 about the center of the holder 2 as an axis. The holder 2 can be rotatably rotated by the adjusting screw 6 inserted into the housing 8, whereby the beam pitch in the sub-scanning direction from the light sources 1-1 and 1-2 can be adjusted. it can.
【００１５】図２に詳しくように、光源ユニット５は光
源１−１、１−２と、ホルダ２とコリメートレンズ３−
１、３−２によって構成される。ここで、図３は特開平
９−１２７４４１号公報における光源ユニットを示して
いる。この従来技術においては、光源ユニットを構成す
る部材として、光源１−１、１−２と、光源１−１、１
−２をそれぞれ支持するホルダ２−１、２−２と、コリ
メートレンズ３−１、３−２を取付ける基体９と、２本
のビームを合成するプリズム１０と、プリズム１０を保
持するフランジ１１と、２つのビーム間の副走査ピッチ
を調整する為の角度設定部材１２が必要となり、非常に
複雑な構成となっている。As shown in FIG. 2, the light source unit 5 includes light sources 1-1 and 1-2, a holder 2 and a collimating lens 3-.
1, 3-2. Here, FIG. 3 shows a light source unit in JP-A-9-127441. In this conventional technique, light sources 1-1 and 1-2 and light sources 1-1 and 1-1 are used as members constituting a light source unit.
2-1 and 2-2, respectively, a base 9 on which the collimating lenses 3-1 and 3-2 are mounted, a prism 10 for combining two beams, and a flange 11 for holding the prism 10. In addition, the angle setting member 12 for adjusting the sub-scanning pitch between the two beams is required, and the configuration is very complicated.
【００１６】図４は本発明における光源ユニット５の組
み立て工程をを示している。まず、図４（ａ）に示すよ
うに、２本の線材の固定部材４−１、４−２が光源ユニ
ット５の中心から左右対称な位置であってハウジング８
の上下部に引っかかるように、また、容易に取り外し可
能に取付けられる。そして、図４（ｂ）に示すように光
源ユニット５はその中央凸部５ａがハウジング８の開口
８ａ内に挿入された後、光源ユニット５の両端が各々の
固定部材４−１、４−２によってハウジング８に押し付
けられる。そして、ホルダ２を回動自在に回転させるた
めの調整ネジ６をホルダ２及びハウジング８の各端部に
螺合する。FIG. 4 shows an assembling process of the light source unit 5 according to the present invention. First, as shown in FIG. 4A, the two wire fixing members 4-1 and 4-2 are located symmetrically with respect to the center of the light source unit 5 and the housing 8
It is easily removably attached so as to be hooked on the upper and lower portions of the device. Then, as shown in FIG. 4B, after the central convex portion 5a of the light source unit 5 is inserted into the opening 8a of the housing 8, both ends of the light source unit 5 are fixed to the respective fixing members 4-1 and 4-2. Is pressed against the housing 8. Then, an adjusting screw 6 for rotatably rotating the holder 2 is screwed to each end of the holder 2 and the housing 8.
【００１７】これにより、万一、光源ユニット５が壊れ
た場合において、光源ユニット５のみを簡単に取り外
し、交換できることができる。また、固定部材４−１、
４−２が線材であり、線材の弾性力を利用して光源ユニ
ット５を保持している為、ネジ止めように、ドライバな
どの工具を必要とせず、また頻繁に光源ユニット５の交
換を行った場合でも、ネジ穴が潰れてしまうなどの不具
合を発生することがない。Thus, if the light source unit 5 is broken, only the light source unit 5 can be easily removed and replaced. Also, the fixing member 4-1,
4-2 is a wire rod, which holds the light source unit 5 using the elastic force of the wire rod, so that a tool such as a screwdriver is not required, such as screwing, and the light source unit 5 is frequently replaced. In this case, there is no problem such as the screw holes being crushed.
【００１８】[0018]
【発明の効果】以上説明したように請求項１記載の発明
によれば、従来技術に比べ、不必要な部品を削減するこ
とができ、大幅にコストダウンできると共に、組付性を
向上することが可能である。As described above, according to the first aspect of the present invention, unnecessary parts can be reduced, the cost can be greatly reduced, and the assemblability can be improved as compared with the prior art. Is possible.
【００１９】請求項２記載の発明によれば、固定部材を
外すことにより、簡単に光源ユニットを取り外すことが
でき、光源が破損した場合も容易に光源部だけ交換でき
る。According to the second aspect of the present invention, by removing the fixing member, the light source unit can be easily removed, and even if the light source is damaged, only the light source unit can be easily replaced.
【００２０】請求項３記載の発明によれば、固定部材が
ハウジングの上下部に引っ掛かけた位置を支点に回動可
能なので、前記支点に関して回動させることにより、取
り付け取り外しが容易に行える。According to the third aspect of the present invention, since the fixing member is rotatable about the position where the fixing member is hooked on the upper and lower portions of the housing, the mounting and dismounting can be easily performed by rotating the fixing member about the fulcrum.
【００２１】請求項４記載の発明によれば、線材の弾性
力を利用して光源ユニットを保持しているため、ネジ止
めように、ドライバなどの工具を必要とせず、また頻繁
に光源部の交換を行った場合でも、ネジ穴が潰れてしま
うなどの不具合を発生することがない。According to the fourth aspect of the present invention, since the light source unit is held by utilizing the elastic force of the wire, a tool such as a screwdriver is not required, such as screwing, and the light source unit is frequently used. Even when the replacement is performed, there is no problem such as the screw hole being crushed.
【図１】本発明に係るマルチビーム走査装置の一実施形
態を示す分解斜視図である。FIG. 1 is an exploded perspective view showing an embodiment of a multi-beam scanning device according to the present invention.
【図２】図１の光源ユニットを詳しく示す側面図であ
る。FIG. 2 is a side view showing the light source unit of FIG. 1 in detail.
【図３】図２の光源ユニットと比較した従来例を示す側
面図である。FIG. 3 is a side view showing a conventional example in comparison with the light source unit of FIG. 2;
【図４】図１のマルチビーム走査装置の組み立て工程を
示す斜視図である。FIG. 4 is a perspective view showing an assembling process of the multi-beam scanning device of FIG. 1;
１−１、１−２ 光源 ２ ホルダ ３−１、３−２ コリメートレンズ ５ 光源ユニット ６ 調整ネジ ８ ハウジング 1-1, 1-2 Light source 2 Holder 3-1, 3-2 Collimating lens 5 Light source unit 6 Adjusting screw 8 Housing
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2C362 AA43 AA45 BA56 BA90 DA02 EA00 2H045 BA22 BA23 DA02 DA41 5C072 AA03 CA06 CA09 DA02 DA21 DA23 HA02 HA06 HA13 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2C362 AA43 AA45 BA56 BA90 DA02 EA00 2H045 BA22 BA23 DA02 DA41 5C072 AA03 CA06 CA09 DA02 DA21 DA23 HA02 HA06 HA13
Claims (4)
源、及び前記複数の光源からのそれぞれの光束を平行化
する複数のコリメートレンズをホルダにより保持して構
成した光源ユニットと、 前記光源ユニットを取付けるためのハウジングとを備え
たマルチビーム走査装置において、 前記光源ユニットを、前記ハウジングに回動自在に取付
けられた弾性の固定部材により押し付けて固定したこと
を特徴とするマルチビーム走査装置。A light source unit configured to hold a plurality of light sources that emit a plurality of laser beams, and a plurality of collimating lenses that collimate respective light beams from the plurality of light sources with a holder; A multi-beam scanning device comprising a housing for mounting, wherein the light source unit is pressed and fixed by an elastic fixing member rotatably mounted on the housing.
心として左右対称な位置に前記ハウジングの上下部に引
っ掛かけ、容易に取り外し可能に取付けられていること
を特徴とする請求項１記載のマルチビーム走査装置。2. The fixing device according to claim 1, wherein the fixing member is hooked on upper and lower portions of the housing at positions symmetrical about the light source unit, and is easily detachably attached. Multi-beam scanning device.
部に引っ掛かけた位置を支点に回動可能であることを特
徴とする請求項２記載のマルチビーム走査装置。3. The multi-beam scanning device according to claim 2, wherein the fixing member is rotatable around a position hooked on upper and lower portions of the housing.
て光源ユニットを保持することを特徴とする請求項１ま
たは２記載のマルチビーム走査装置。4. The multi-beam scanning device according to claim 1, wherein the fixing member holds the light source unit using an elastic force of a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000380555A JP2002182141A (en) | 2000-12-14 | 2000-12-14 | Multibeam scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000380555A JP2002182141A (en) | 2000-12-14 | 2000-12-14 | Multibeam scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002182141A true JP2002182141A (en) | 2002-06-26 |
Family
ID=18848715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000380555A Pending JP2002182141A (en) | 2000-12-14 | 2000-12-14 | Multibeam scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002182141A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1792739A2 (en) | 2005-11-30 | 2007-06-06 | Ricoh Company, Ltd. | Image forming apparatus having enhanced fixing configuration for optical scanning unit |
| US8717656B2 (en) | 2008-09-17 | 2014-05-06 | Ricoh Company, Ltd. | Optical scanning device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231879U (en) * | 1975-08-29 | 1977-03-05 | ||
| JPS5599080U (en) * | 1978-12-28 | 1980-07-10 | ||
| JPS6126279U (en) * | 1984-07-23 | 1986-02-17 | マスプロ電工株式会社 | High frequency signal connector |
| JPH0224470U (en) * | 1988-07-30 | 1990-02-19 | ||
| JPH04328515A (en) * | 1991-04-30 | 1992-11-17 | Minolta Camera Co Ltd | Laser beam scanning optical system |
| JPH04338712A (en) * | 1991-05-15 | 1992-11-26 | Canon Inc | Laser light source holding structure of scanning optical system |
| JPH0865459A (en) * | 1994-08-16 | 1996-03-08 | Canon Inc | Light source device |
| JPH10221559A (en) * | 1997-02-12 | 1998-08-21 | Nippon Telegr & Teleph Corp <Ntt> | Connection structure of optical connector |
| JPH11119064A (en) * | 1997-10-17 | 1999-04-30 | Fujitsu Ltd | Optical transmission terminal device |
| JP2000330046A (en) * | 1999-05-17 | 2000-11-30 | Ricoh Co Ltd | Optical scanner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231879U (en) * | 1975-08-29 | 1977-03-05 | ||
| JPS5599080U (en) * | 1978-12-28 | 1980-07-10 | ||
| JPS6126279U (en) * | 1984-07-23 | 1986-02-17 | マスプロ電工株式会社 | High frequency signal connector |
| JPH0224470U (en) * | 1988-07-30 | 1990-02-19 | ||
| JPH04328515A (en) * | 1991-04-30 | 1992-11-17 | Minolta Camera Co Ltd | Laser beam scanning optical system |
| JPH04338712A (en) * | 1991-05-15 | 1992-11-26 | Canon Inc | Laser light source holding structure of scanning optical system |
| JPH0865459A (en) * | 1994-08-16 | 1996-03-08 | Canon Inc | Light source device |
| JPH10221559A (en) * | 1997-02-12 | 1998-08-21 | Nippon Telegr & Teleph Corp <Ntt> | Connection structure of optical connector |
| JPH11119064A (en) * | 1997-10-17 | 1999-04-30 | Fujitsu Ltd | Optical transmission terminal device |
| JP2000330046A (en) * | 1999-05-17 | 2000-11-30 | Ricoh Co Ltd | Optical scanner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1792739A2 (en) | 2005-11-30 | 2007-06-06 | Ricoh Company, Ltd. | Image forming apparatus having enhanced fixing configuration for optical scanning unit |
| EP1792739A3 (en) * | 2005-11-30 | 2008-07-02 | Ricoh Company, Ltd. | Image forming apparatus having enhanced fixing configuration for optical scanning unit |
| US8339435B2 (en) | 2005-11-30 | 2012-12-25 | Ricoh Company, Ltd. | Image forming apparatus and optical scanning unit |
| US8675035B2 (en) | 2005-11-30 | 2014-03-18 | Ricoh Company, Ltd. | Image forming apparatus and optical scanning unit |
| US8717656B2 (en) | 2008-09-17 | 2014-05-06 | Ricoh Company, Ltd. | Optical scanning device |
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