JPH1134392A - Deflection scanning apparatus and image forming apparatus loaded therewith - Google Patents
Deflection scanning apparatus and image forming apparatus loaded therewithInfo
- Publication number
- JPH1134392A JPH1134392A JP9205321A JP20532197A JPH1134392A JP H1134392 A JPH1134392 A JP H1134392A JP 9205321 A JP9205321 A JP 9205321A JP 20532197 A JP20532197 A JP 20532197A JP H1134392 A JPH1134392 A JP H1134392A
- Authority
- JP
- Japan
- Prior art keywords
- optical box
- lid member
- body frame
- scanning
- main body
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 67
- 239000002184 metal Substances 0.000 claims description 8
- 238000003384 imaging method Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 description 10
- 108091008695 photoreceptors Proteins 0.000 description 9
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 206010033307 Overweight Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はレーザビームプリン
タやレーザファクシミリ等の画像形成装置に用いられる
偏向走査装置およびこれを搭載する画像形成装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection scanning device used for an image forming apparatus such as a laser beam printer and a laser facsimile and an image forming apparatus equipped with the same.
【０００２】[0002]
【従来の技術】図６は一従来例によるレーザビームプリ
ンタやレーザファクシミリ等の画像形成装置に用いられ
る偏向走査装置を示すもので、半導体レーザ１０１から
発生された光ビームであるレーザ光Ｌ0 はコリメータレ
ンズによって平行化され、シリンドリカルレンズ１０２
によって線状の光束に集光されて、回転多面鏡１０３の
反射面に入射する。その反射光は、回転多面鏡１０３の
回転によって偏向走査されて、Ｙ軸方向（主走査方向）
の走査光となり、走査レンズ１０４を経て回転ドラム１
０５上の感光体に結像する。感光体に結像する光束は、
回転多面鏡１０３の回転によるＹ軸方向の主走査と、回
転ドラム１０５の回転によるＺ軸方向の副走査に伴なっ
て静電潜像を形成する。BACKGROUND ART FIG. 6 shows a deflection scanning apparatus used in an image forming apparatus such as a laser beam printer or a laser facsimile according to one conventional example, the laser beam L 0 is a light beam generated from the semiconductor laser 101 Collimated by a collimator lens, the cylindrical lens 102
As a result, the light is condensed into a linear light beam and is incident on the reflection surface of the rotary polygon mirror 103. The reflected light is deflected and scanned by the rotation of the rotary polygon mirror 103, and is scanned in the Y-axis direction (main scanning direction).
Of the rotating drum 1 through the scanning lens 104
An image is formed on the photoreceptor 05. The light flux that forms an image on the photoconductor is
An electrostatic latent image is formed by main scanning in the Y-axis direction by rotation of the rotating polygon mirror 103 and sub-scanning in the Z-axis direction by rotation of the rotating drum 105.
【０００３】感光体の周辺には、感光体の表面を一様に
帯電する帯電装置、感光体の表面に形成される静電潜像
をトナー像に顕像化するための顕像化装置、前記トナー
像を記録紙等の記録媒体に転写する転写装置等が配置さ
れており、これらの働きによって、半導体レーザ１０１
が発生する光ビームに対応する記録情報が記録紙等にプ
リントされる。In the periphery of the photoreceptor, a charging device for uniformly charging the surface of the photoreceptor, a visualization device for visualizing an electrostatic latent image formed on the surface of the photoreceptor into a toner image, A transfer device or the like for transferring the toner image to a recording medium such as a recording paper is provided.
Is recorded on a recording sheet or the like corresponding to the light beam that generates.
【０００４】回転多面鏡１０３の走査光は、その走査面
の一端に達したものが、集光レンズ１０６ａを経てＢＤ
センサ１０６ｂに導入され、図示しないコントローラに
おいて走査開始信号に変換されて半導体レーザ１０１に
送信される。半導体レーザ１０１は走査開始信号を受信
したうえで、図示しないホストコンピュータから送信さ
れる画像情報に基づいた書き込み変調を開始する。The scanning light of the rotary polygon mirror 103 reaches one end of the scanning surface, and is transmitted through a condenser lens 106a to a BD.
The light is introduced into the sensor 106b, converted into a scanning start signal by a controller (not shown), and transmitted to the semiconductor laser 101. After receiving the scan start signal, the semiconductor laser 101 starts write modulation based on image information transmitted from a host computer (not shown).
【０００５】半導体レーザ１０１やシリンドリカルレン
ズ１０２、回転多面鏡１０３、走査レンズ１０４、ＢＤ
センサ１０６ｂ等は合成樹脂製の光学箱１１０の内部に
取り付けられる。回転ドラム１０５は光学箱１１０の外
側に配設されており、光学箱１１０の一端には走査光を
光学箱１１０から回転ドラム１０５に向かって取り出す
ための窓が設けられている。A semiconductor laser 101, a cylindrical lens 102, a rotating polygon mirror 103, a scanning lens 104, a BD
The sensor 106b and the like are mounted inside an optical box 110 made of synthetic resin. The rotating drum 105 is provided outside the optical box 110, and one end of the optical box 110 is provided with a window for taking out scanning light from the optical box 110 toward the rotating drum 105.
【０００６】走査レンズ１０４は、球面レンズ部とトー
リックレンズ部からなり、回転多面鏡１０３によって等
角速度で走査される走査光を回転ドラム１０５上におい
てＹ軸方向に等速度で走査する走査光に変換するいわゆ
るｆθ機能を有する。The scanning lens 104 includes a spherical lens unit and a toric lens unit, and converts scanning light scanned at a constant angular speed by the rotary polygon mirror 103 into scanning light scanning at a constant speed in the Y-axis direction on the rotating drum 105. So-called fθ function.
【０００７】光学箱１１０の側壁の上端には、図８およ
び図９に示すように、ビス１２１によってふた部材１２
０をビス止めするためのビス穴１１０ａと、ふた部材１
２０の位置決め穴に係合する位置決めピン１１０ｂが設
けられている。また、光学箱１１０の側壁の外側には、
一対の組み付け部材１１１が突出しており、各組み付け
部材１１１は、ビス１１２ａによって板金製の支持板１
１２に光学箱１１０を締結するための一対の長穴１１１
ａと、位置決めユニット１１３の位置決めピン１１３ａ
を遊嵌させる穴１１１ｂを備えている。At the upper end of the side wall of the optical box 110, as shown in FIGS.
Screw hole 110a for fixing the screw 0, and the lid member 1
A positioning pin 110b that engages with the 20 positioning holes is provided. Also, outside the side wall of the optical box 110,
A pair of assembling members 111 protrude, and each assembling member 111 is supported by a screw 112a.
A pair of elongated holes 111 for fastening the optical box 110 to
a and positioning pins 113a of the positioning unit 113
Is provided.
【０００８】各位置決めユニット１１３の位置決めピン
１１３ａは、組み付け部材１１１の穴１１１ｂの寸法の
許す範囲でＸＹ方向に相対変位自在であり、位置決めユ
ニット１１３ａを光学箱１１０に対して相対的に微小量
だけ移動させることで、回転ドラム１０５に対する光学
箱１１０の相対位置の調整を行なう。この調整は、感光
体に結像する走査光の結像位置を最終的に調整するもの
であり、このような調整を行なったうえで、位置決めユ
ニット１１３の長穴１１３ｂを貫通するビス１１３ｃを
光学箱１１０の組み付け部材１１１のねじ穴１１１ｃに
締め付けて位置決めユニット１１３を固定する。The positioning pins 113a of each positioning unit 113 can be relatively displaced in the X and Y directions within a range allowed by the size of the hole 111b of the assembling member 111. By moving, the relative position of the optical box 110 with respect to the rotating drum 105 is adjusted. This adjustment is to finally adjust the image forming position of the scanning light to form an image on the photoreceptor. After such adjustment is made, the screw 113c penetrating the elongated hole 113b of the positioning unit 113 is optically adjusted. The positioning unit 113 is fixed by tightening into the screw hole 111c of the assembling member 111 of the box 110.
【０００９】支持板１１２は、その両端を画像形成装置
の本体フレーム１３０の支持部１３１に載置される。支
持部１３１に立設された位置決めピン１３１ａを支持板
１１２の位置決め穴に係合させて、ビス１３０ｂを締め
付けることで、支持板１１２が本体フレーム１３０の支
持部１３１にビス止めされる。The support plate 112 has both ends mounted on a support portion 131 of a main body frame 130 of the image forming apparatus. The support plate 112 is screwed to the support portion 131 of the main frame 130 by engaging the positioning pin 131a provided on the support portion 131 with the positioning hole of the support plate 112 and tightening the screw 130b.
【００１０】画像形成装置の本体フレーム１３０に対す
る光学箱１１０の組み付けは、前述のように位置決めユ
ニット１１３による位置決めを完了したうえで、位置決
めピン１１３ａを支持板１１２の位置決め穴１１２ｂに
係合させ、ビス１１２ａによって光学箱１１０を支持板
１１２に固定する工程が必要である。When the optical box 110 is assembled to the main body frame 130 of the image forming apparatus, the positioning pin 113a is engaged with the positioning hole 112b of the support plate 112 after the positioning by the positioning unit 113 is completed as described above. A step of fixing the optical box 110 to the support plate 112 by 112a is required.
【００１１】なお、回転多面鏡１０３を回転駆動するモ
ータ１０３ａは、モータ基板１０３ｂに実装された図示
しない駆動回路と、該駆動回路の駆動電流によって励磁
されるステータおよびこれに対向するロータ等からなる
磁気回路によって構成される。The motor 103a for rotatingly driving the rotary polygon mirror 103 includes a drive circuit (not shown) mounted on a motor board 103b, a stator excited by a drive current of the drive circuit, a rotor opposed thereto, and the like. It is constituted by a magnetic circuit.
【００１２】[0012]
【発明が解決しようとする課題】しかしながら上記従来
の技術によれば、光学箱を画像形成装置の本体フレーム
に組み付けるに際して、前述のように、高剛性の板金等
によって作られた支持板を介して本体フレームに光学箱
を組み付ける構成であるために、ビス止め等の締結作業
に手間がかかり、また、支持板に加えて数多くのビスを
用いるために組立部品点数が多く、その結果、装置の組
立コストや部品コストが上昇するという未解決の課題が
ある。However, according to the above prior art, when assembling the optical box to the main body frame of the image forming apparatus, as described above, the optical box is provided via the support plate made of a highly rigid sheet metal or the like. Since the optical box is assembled to the main body frame, it takes time to fasten screws and other fasteners.Moreover, many screws are used in addition to the support plate, resulting in a large number of assembly parts. There is an unsolved problem that costs and parts costs increase.
【００１３】また、高剛性の板金部材等である支持板が
大面積かつ高重量であるため、偏向走査装置の小型化お
よび軽量化を促進できないという不都合もある。In addition, since the supporting plate, which is a high-rigidity sheet metal member or the like, has a large area and a large weight, there is an inconvenience that the size and weight of the deflection scanning device cannot be promoted.
【００１４】本発明は、上記従来の技術の有する未解決
の課題に鑑みてなされたものであり、板金製の支持板等
を用いることなく、光学箱を直接画像形成装置の本体フ
レームに組み付けることのできる安価で高性能な偏向走
査装置およびこれを搭載する画像形成装置を提供するこ
とを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned unresolved problems of the prior art, and is intended to assemble an optical box directly to a main body frame of an image forming apparatus without using a sheet metal support plate or the like. It is an object of the present invention to provide an inexpensive and high-performance deflection scanning device and an image forming apparatus equipped with the same.
【００１５】[0015]
【課題を解決するための手段】上記の目的を達成するた
めに本発明の偏向走査装置は、光源から発生された光ビ
ームを偏向走査する走査手段と、該走査手段を経て前記
光ビームを感光体に結像させる結像光学系と、該結像光
学系および前記走査手段を収容する光学箱と、該光学箱
の開口を塞ぐふた部材を有し、該ふた部材が、前記光学
箱を組み付ける本体フレームの支持部まで伸びる延長部
と、前記光学箱を前記支持部に対して位置決めするため
の位置決め手段を備えていることを特徴とする。In order to achieve the above object, a deflection scanning apparatus according to the present invention comprises a scanning means for deflecting and scanning a light beam generated from a light source, and a photosensitive means for exposing the light beam via the scanning means. An imaging optical system that forms an image on a body, an optical box that houses the imaging optical system and the scanning unit, and a lid member that closes an opening of the optical box, wherein the lid member assembles the optical box. An extension extending to the support of the main body frame and positioning means for positioning the optical box with respect to the support are provided.
【００１６】[0016]
【作用】本体フレームに設けられた支持部等と光学箱の
間に板金製の支持板等を介在させることなく、ふた部材
を本体フレームの支持部まで延長して直接これに組み付
けるように構成する。本体フレームと光学箱の間に支持
板等を介在させる必要がないから、装置の組立工程の簡
略化と、組立部品点数の削減に大きく貢献できる。The lid member is extended to the support portion of the main body frame and directly assembled to the optical box without interposing a support plate made of sheet metal between the optical box and the support portion provided on the main body frame. . Since there is no need to interpose a support plate or the like between the main body frame and the optical box, it is possible to greatly contribute to simplifying the assembling process of the apparatus and reducing the number of assembled parts.
【００１７】また、高重量の支持板を省略することで、
装置の軽量化を大きく促進できるうえに、回転ドラム等
に対する光学箱の相対位置の調整も一度ですむという利
点がある。これによって、画像形成装置の低価格化と高
性能化等を促進できる。Further, by omitting the high-weight support plate,
The weight of the apparatus can be greatly reduced, and the relative position of the optical box with respect to the rotating drum or the like can be adjusted only once. As a result, it is possible to promote cost reduction and high performance of the image forming apparatus.
【００１８】[0018]
【発明の実施の形態】本発明の実施の形態を図面に基づ
いて説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１９】図１は一実施の形態による偏向走査装置を
示すもので、光源である半導体レーザ１から発生された
光ビームであるレーザ光Ｌ1 はコリメータレンズによっ
て平行化され、シリンドリカルレンズ２によって線状の
光束に集光されて、走査手段である回転多面鏡３の反射
面に入射する。その反射光は、回転多面鏡３の回転によ
って偏向走査されて、Ｙ軸方向（主走査方向）の走査光
となり、走査レンズ４を経て図示しない回転ドラム上の
感光体に結像する。感光体に結像する光束は、回転多面
鏡３の回転によるＹ軸方向の主走査と、回転ドラムの回
転によるＺ軸方向の副走査に伴なって静電潜像を形成す
る。FIG. 1 shows a deflection scanning device according to an embodiment. A laser beam L 1, which is a light beam emitted from a semiconductor laser 1 as a light source, is collimated by a collimator lens and is linearly converted by a cylindrical lens 2. The light is condensed into a luminous flux, and is incident on the reflection surface of the rotary polygon mirror 3 as the scanning means. The reflected light is deflected and scanned by the rotation of the rotary polygon mirror 3 to become scanning light in the Y-axis direction (main scanning direction), and forms an image on a photosensitive member on a rotating drum (not shown) via the scanning lens 4. The light beam that forms an image on the photoreceptor forms an electrostatic latent image with the main scanning in the Y-axis direction by the rotation of the rotary polygon mirror 3 and the sub-scanning in the Z-axis direction by the rotation of the rotating drum.
【００２０】感光体の周辺には、感光体の表面を一様に
帯電する帯電装置、感光体の表面に形成される静電潜像
をトナー像に顕像化するための顕像化装置、前記トナー
像を記録紙等の記録媒体に転写する転写装置等が配置さ
れており、これらの働きによって、半導体レーザ１が発
生する光ビームに対応する記録情報が記録紙等にプリン
トされる。In the periphery of the photoreceptor, a charging device for uniformly charging the surface of the photoreceptor, a visualization device for visualizing an electrostatic latent image formed on the surface of the photoreceptor into a toner image, A transfer device or the like for transferring the toner image onto a recording medium such as recording paper is provided, and by these operations, recording information corresponding to the light beam generated by the semiconductor laser 1 is printed on recording paper or the like.
【００２１】回転多面鏡３の走査光は、その走査面の一
端に達したものが集光レンズ５ａを経てＢＤセンサ５ｂ
に導入され、図示しないコントローラにおいて走査開始
信号に変換されて半導体レーザ１に送信される。半導体
レーザ１は走査開始信号を受信したうえで、図示しない
ホストコンピュータから送信される画像情報に基づいた
書き込み変調を開始する。The scanning light of the rotary polygon mirror 3 reaches one end of the scanning surface and passes through the condenser lens 5a to the BD sensor 5b.
And is converted into a scanning start signal by a controller (not shown) and transmitted to the semiconductor laser 1. After receiving the scanning start signal, the semiconductor laser 1 starts writing modulation based on image information transmitted from a host computer (not shown).
【００２２】半導体レーザ１やシリンドリカルレンズ
２、回転多面鏡３、走査レンズ４、ＢＤセンサ５ｂ等は
合成樹脂製の光学箱１０の内部に取り付けられる。回転
ドラムは光学箱１０の外側に配設されており、光学箱１
０の一端には走査光を光学箱１０から回転ドラムに向か
って取り出すための窓が設けられている。The semiconductor laser 1, the cylindrical lens 2, the rotary polygon mirror 3, the scanning lens 4, the BD sensor 5b, etc. are mounted inside an optical box 10 made of synthetic resin. The rotating drum is provided outside the optical box 10 and the optical box 1
A window for taking out the scanning light from the optical box 10 toward the rotating drum is provided at one end of 0.
【００２３】走査レンズ４は、球面レンズ部とトーリッ
クレンズ部からなり、回転多面鏡３によって等角速度で
走査される走査光を回転ドラム上においてＹ軸方向に等
速度で走査する走査光に変換するいわゆるｆθ機能を有
する。The scanning lens 4 includes a spherical lens unit and a toric lens unit, and converts scanning light scanned at a constant angular speed by the rotary polygon mirror 3 into scanning light scanning at a constant speed in the Y-axis direction on the rotating drum. It has a so-called fθ function.
【００２４】光学箱６の底壁等に、シリンドリカルレン
ズ２、回転多面鏡３、走査レンズ４等を組み付けたうえ
で、図１の（ｂ）に示すように、光学箱１０の上部の開
口をふた部材２０によって塞ぐ。ふた部材２０は、高剛
性の金属によって作られた板状体であり、光学箱１０の
側傍へ突出する延長部２１を有し、各延長部２１には、
回転ドラムに対する光学箱１０の相対位置を調節するた
めの位置決め手段である位置決めユニット２４が配設さ
れる。After assembling the cylindrical lens 2, the rotary polygon mirror 3, the scanning lens 4 and the like on the bottom wall and the like of the optical box 6, as shown in FIG. It is closed by the lid member 20. The lid member 20 is a plate-shaped body made of a highly rigid metal, and has extension portions 21 protruding to the side of the optical box 10.
A positioning unit 24 as positioning means for adjusting the relative position of the optical box 10 with respect to the rotating drum is provided.
【００２５】画像形成装置の本体フレーム３０に対する
光学箱１０の組み付けに際しては、光学箱１０の側壁の
外側に張り出すふた部材２０の延長部２１をそれぞれ、
本体フレーム３０の一対の支持部３１上に載置して、図
２に示すように、各延長部２１をビス２３によってビス
止めする。When assembling the optical box 10 to the main body frame 30 of the image forming apparatus, the extension portions 21 of the lid members 20 projecting outside the side wall of the optical box 10 are respectively attached.
The extension portions 21 are mounted on a pair of support portions 31 of the main body frame 30 and each extension portion 21 is screwed with a screw 23 as shown in FIG.
【００２６】詳しく説明すると、光学箱１０の側壁の上
端には、ビス２２によってふた部材２０をビス止めする
ためのビス穴１０ａと、ふた部材２０の位置決め穴２０
ａに係合する位置決めピン１０ｂが設けられており、光
学箱１０に対するふた部材２０の組み付けは、その位置
決め穴２０ａを光学箱１０の位置決めピン１０ｂに係合
させ、ビス２２によってふた部材２０をビス止めするこ
とによって行なわれる。More specifically, at the upper end of the side wall of the optical box 10, a screw hole 10a for screwing the lid member 20 with the screw 22 and a positioning hole 20 for the lid member 20 are provided.
a positioning pin 10b engaging with the optical box 10 is provided. When the lid member 20 is assembled to the optical box 10, the positioning hole 20a is engaged with the positioning pin 10b of the optical box 10, and the lid member 20 is screwed with the screw 22. It is done by stopping.
【００２７】このようにして光学箱１０にふた部材２０
を組み付けたうえで、ふた部材２０の各延長部２１の穴
２０ｂに位置決めユニット２４の位置決めピン２４ａを
遊嵌させる。工場現場の専用治具を用いて、ふた部材２
０の延長部２１と位置決めユニット２４の間の相対位置
をＸＹ方向に調節し、光学箱１０を本体フレーム３０に
組み付けたときの回転ドラムに対する相対位置を予め調
節する。続いて、ビス２４ｂによって位置決めユニット
２４をふた部材２０の延長部２１にビス止めする。In this manner, the lid member 20 is placed on the optical box 10.
Then, the positioning pin 24a of the positioning unit 24 is loosely fitted into the hole 20b of each extension 21 of the lid member 20. Using a special jig at the factory site, cover member 2
The relative position between the extension 21 of the zero and the positioning unit 24 is adjusted in the X and Y directions, and the relative position with respect to the rotating drum when the optical box 10 is assembled to the main body frame 30 is adjusted in advance. Subsequently, the positioning unit 24 is screwed to the extension 21 of the lid member 20 with a screw 24b.
【００２８】最後に、ふた部材２０を組み付けた光学箱
１０を画像形成装置の本体フレーム３０内に搬入し、ふ
た部材２０の各延長部２１を本体フレーム３０の支持部
３１に載置し、各位置決めユニット２４の位置決めピン
２４ａを支持部３１の位置決め穴に係合させて、ビス２
３を締め付ける。これによってふた部材２０を本体フレ
ーム３０の支持部３１に固定する。Finally, the optical box 10 with the lid member 20 assembled is carried into the main body frame 30 of the image forming apparatus, and each extension 21 of the lid member 20 is placed on the support part 31 of the main body frame 30. The positioning pin 24a of the positioning unit 24 is engaged with the positioning hole of the
Tighten 3. Thus, the lid member 20 is fixed to the support portion 31 of the main body frame 30.
【００２９】本実施の形態によれば、ふた部材の延長部
を用いて光学箱を本体フレームに直接組み付けるもので
あるから、両者の間に従来例のような支持板を必要とせ
ず、従って、装置の組立に必要なビス止めの工程数を低
減して、組立工程を大幅に簡略化できる。According to this embodiment, since the optical box is directly assembled to the main body frame by using the extension of the lid member, a support plate is not required between the two as in the conventional example. The number of screwing steps required for assembling the device can be reduced, and the assembling process can be greatly simplified.
【００３０】また、支持板やビスを省略することで装置
の組立部品点数を大幅に削減できるうえに、回転ドラム
に対する光学箱の位置合わせも簡単である。By omitting the support plate and the screws, the number of assembly parts of the apparatus can be greatly reduced, and the alignment of the optical box with respect to the rotating drum is easy.
【００３１】さらに、ふた部材の両側部を延長してふた
部材の寸法を幾分大きくするだけですむため、ふた部材
が金属製であっても、板金製で高重量の支持板を用いる
場合に比べて、装置の軽量化を大きく促進できるという
長所がある。Further, since it is only necessary to extend the both sides of the lid member to slightly increase the dimensions of the lid member, even if the lid member is made of metal, it is necessary to use a metal plate and a heavy supporting plate. On the contrary, there is an advantage that the weight reduction of the device can be greatly promoted.
【００３２】図３は一変形例を示す。これは、光学箱１
０にふた部材４０をビス止めするための締結部を用い
て、回転ドラムに対する光学箱１０の相対位置の調節を
行なうように構成することで、図１および図２の位置決
めユニットを省略したものである。ふた部材４０に寸法
の大きい長穴４０ａを設けてこれにビス４２を仮り止め
し、前述と同様に工場現場の専用治具を用いてふた部材
４０と光学箱１０の相対位置をＸＹ方向に調節する。こ
れによって、光学箱１０を本体フレーム５０に組み付け
たときの回転ドラムに対する相対位置を調節する。続い
て、ビス４２を締め付けてふた部材４０を光学箱１０に
固定する。FIG. 3 shows a modification. This is optical box 1
The positioning unit of FIGS. 1 and 2 is omitted by adjusting the relative position of the optical box 10 with respect to the rotating drum by using a fastening portion for screwing the lid member 40 to zero. is there. A large hole 40a having a large dimension is provided in the lid member 40, and a screw 42 is temporarily fixed to the hole. I do. Thereby, the relative position with respect to the rotating drum when the optical box 10 is assembled to the main body frame 50 is adjusted. Subsequently, the screw 42 is tightened to fix the lid member 40 to the optical box 10.
【００３３】このようにして光学箱１０にふた部材４０
を組み付けたものを画像形成装置の本体フレーム５０内
に搬入し、ふた部材４０の各延長部４１の位置決め穴４
０ｂに本体フレーム５０の支持部５１の位置決めピン５
１ａを係合させ、ビス５１ｂによってふた部材４０を支
持部５１にビス止めする。In this manner, the lid member 40 is attached to the optical box 10.
Is loaded into the main body frame 50 of the image forming apparatus, and the positioning holes 4 of the extension portions 41 of the lid member 40 are provided.
0b, the positioning pin 5 of the support portion 51 of the main body frame 50
1a is engaged, and the lid member 40 is screwed to the support portion 51 with a screw 51b.
【００３４】本変形例は、位置決めユニットを省略する
ことで組立工程数や組立部品点数を低減できる長所があ
るものの、ふた部材４０を本体フレーム５０に組み付け
たのちにふた部材４０から光学箱１０を取りはずしたと
きは、両者の位置出しのための位置決めユニットがない
ために再度専用治具を用いた位置出しの工程が必要とな
る。Although this modification has an advantage that the number of assembly steps and the number of assembly parts can be reduced by omitting the positioning unit, the optical member 10 is removed from the lid member 40 after the lid member 40 is assembled to the main body frame 50. When they are removed, there is no positioning unit for positioning them, so a positioning step using a special jig is required again.
【００３５】なお、本実施の形態においては、ふた部材
を本体フレームに固定することで光学箱をふた部材から
懸下された状態で画像形成装置に組み付けるように構成
されているが、図５に示すように、光学箱１０にふた部
材６０を組み付けたものを上下逆にして、ふた部材６０
の延長部６１を本体フレーム７０の支持部７１に固定し
てもよい。In the present embodiment, the optical member is fixed to the main body frame so that the optical box is assembled to the image forming apparatus in a state of being suspended from the lid member. As shown, the assembly of the lid member 60 to the optical box 10 is turned upside down, and the lid member 60 is turned upside down.
May be fixed to the support portion 71 of the main body frame 70.
【００３６】このように、光学箱を本体フレームに対し
て上下いずれの方向からも組み付けることが自在である
ため、画像形成装置の設計上の自由度が大幅に増大する
という特筆すべき長所がある。As described above, since the optical box can be freely attached to the main body frame from either the upper or lower direction, there is a remarkable advantage that the degree of freedom in designing the image forming apparatus is greatly increased. .
【００３７】[0037]
【発明の効果】本発明は上述のように構成されているの
で、以下に記載するような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００３８】光学箱の開口を塞ぐふた部材を直接画像形
成装置の本体フレームにビス止めすることで、光学箱の
組み付けを行なうことができる。これによって、画像形
成装置の部品コストや組立コストを大幅に低減し、装置
の軽量化等にも大きく貢献できる。The optical box can be assembled by directly screwing a lid member closing the opening of the optical box to the main body frame of the image forming apparatus. As a result, the cost of parts and the cost of assembling the image forming apparatus can be significantly reduced, and the weight of the apparatus can be greatly reduced.
【図１】一実施の形態による偏向走査装置を示すもの
で、（ａ）はふた部材を取りはずした状態で示す模式平
面図、（ｂ）はふた部材を取り付けた状態を示す一部断
面立面図である。1A and 1B show a deflection scanning device according to an embodiment, in which FIG. 1A is a schematic plan view showing a state where a lid member is removed, and FIG. 1B is a partially sectional elevation view showing a state where the lid member is attached. FIG.
【図２】図１の（ｂ）の装置を示す平面図である。FIG. 2 is a plan view showing the device of FIG. 1 (b).
【図３】一変形例を示す平面図である。FIG. 3 is a plan view showing a modification.
【図４】図３の装置を示す一部断面立面図である。FIG. 4 is a partial sectional elevation view showing the device of FIG. 3;
【図５】別の変形例を示す部分立面図である。FIG. 5 is a partial elevational view showing another modification.
【図６】一従来例による偏向走査装置を示す模式平面図
である。FIG. 6 is a schematic plan view showing a deflection scanning device according to a conventional example.
【図７】図６の装置の一部分を分解して示す分解斜視図
である。FIG. 7 is an exploded perspective view showing a part of the apparatus of FIG. 6 in an exploded manner.
【図８】図６の装置にふた部材を取り付けて本体フレー
ムに組み付けた状態を示す平面図である。FIG. 8 is a plan view showing a state in which a lid member is attached to the apparatus of FIG. 6 and assembled to a main body frame.
【図９】図８の装置を示す一部断面立面図である。9 is an elevational view, partially in section, showing the apparatus of FIG. 8;
１ 半導体レーザ ２ シリンドリカルレンズ ３ 回転多面鏡 ４ 走査レンズ １０ 光学箱 ２０，４０，６０ ふた部材 ２１，４１，６１ 延長部 ２４ 位置決めユニット ３０，５０，７０ 本体フレーム ３１，５１，７１ 支持部 DESCRIPTION OF SYMBOLS 1 Semiconductor laser 2 Cylindrical lens 3 Rotating polygon mirror 4 Scanning lens 10 Optical box 20,40,60 Lid member 21,41,61 Extension part 24 Positioning unit 30,50,70 Body frame 31,51,71 Support part
Claims (5)
する走査手段と、該走査手段を経て前記光ビームを感光
体に結像させる結像光学系と、該結像光学系および前記
走査手段を収容する光学箱と、該光学箱の開口を塞ぐふ
た部材を有し、該ふた部材が、前記光学箱を組み付ける
本体フレームの支持部まで伸びる延長部と、前記光学箱
を前記支持部に対して位置決めするための位置決め手段
を備えていることを特徴とする偏向走査装置。1. A scanning unit for deflecting and scanning a light beam generated from a light source, an imaging optical system for forming an image of the light beam on a photosensitive member via the scanning unit, the imaging optical system, and the scanning unit An optical box that houses the optical box, a lid member that closes the opening of the optical box, the lid member extends to a support portion of the main body frame to which the optical box is assembled, and the optical box with respect to the support portion. A deflection scanning device comprising a positioning means for performing positioning.
れた板状体であることを特徴とする請求項１記載の偏向
走査装置。2. The deflection scanning device according to claim 1, wherein the lid member is a plate-like body made of a highly rigid metal.
持部に対して位置決めするように構成されていることを
特徴とする請求項１または２記載の偏向走査装置。3. The deflection scanning device according to claim 1, wherein the positioning means is configured to position the extension of the lid member with respect to the support.
して位置決めするように構成されていることを特徴とす
る請求項１または２記載の偏向走査装置。4. The deflection scanning device according to claim 1, wherein the positioning means is configured to position the lid member with respect to the optical box.
向走査装置と、その光学箱を組み付ける本体フレームを
有する画像形成装置。5. An image forming apparatus comprising: the deflection scanning device according to claim 1; and a main body frame to which the optical box is assembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20532197A JP3542464B2 (en) | 1997-07-15 | 1997-07-15 | Deflection scanning device and image forming apparatus equipped with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20532197A JP3542464B2 (en) | 1997-07-15 | 1997-07-15 | Deflection scanning device and image forming apparatus equipped with the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1134392A true JPH1134392A (en) | 1999-02-09 |
| JP3542464B2 JP3542464B2 (en) | 2004-07-14 |
Family
ID=16505015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20532197A Expired - Fee Related JP3542464B2 (en) | 1997-07-15 | 1997-07-15 | Deflection scanning device and image forming apparatus equipped with the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3542464B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6636338B1 (en) | 1999-11-24 | 2003-10-21 | Sharp Kabushiki Kaisha | Image forming apparatus |
| JP2008003570A (en) * | 2006-05-24 | 2008-01-10 | Ricoh Co Ltd | Optical scanning device, enclosure of the same, method of constituting the same, and image forming apparatus |
| JP2021004956A (en) * | 2019-06-25 | 2021-01-14 | キヤノン株式会社 | Image forming apparatus |
-
1997
- 1997-07-15 JP JP20532197A patent/JP3542464B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6636338B1 (en) | 1999-11-24 | 2003-10-21 | Sharp Kabushiki Kaisha | Image forming apparatus |
| JP2008003570A (en) * | 2006-05-24 | 2008-01-10 | Ricoh Co Ltd | Optical scanning device, enclosure of the same, method of constituting the same, and image forming apparatus |
| JP2021004956A (en) * | 2019-06-25 | 2021-01-14 | キヤノン株式会社 | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3542464B2 (en) | 2004-07-14 |
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