JP2003195206A - Scanning optical device and image forming device - Google Patents
Scanning optical device and image forming deviceInfo
- Publication number
- JP2003195206A JP2003195206A JP2001398150A JP2001398150A JP2003195206A JP 2003195206 A JP2003195206 A JP 2003195206A JP 2001398150 A JP2001398150 A JP 2001398150A JP 2001398150 A JP2001398150 A JP 2001398150A JP 2003195206 A JP2003195206 A JP 2003195206A
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- Prior art keywords
- optical device
- scanning optical
- scanning
- image
- box
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- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばカラー電子
写真プロセスを有するレーザビームプリンタやデジタル
複写機等のカラー画像形成装置に使用することが好適で
あり、特に各色間の走査線のずれを抑えてカラー画像情
報を記録するために用いる走査光学装置及びこのような
走査光学装置を備える画像形成装置に関するものであ
る。BACKGROUND OF THE INVENTION The present invention is suitable for use in a color image forming apparatus such as a laser beam printer or a digital copying machine having a color electrophotographic process. In particular, the deviation of scanning lines between colors is suppressed. The present invention relates to a scanning optical device used for recording color image information and an image forming apparatus including such a scanning optical device.
【０００２】[0002]
【従来の技術】一般的にレーザビームプリンタやレーザ
ファックス等の画像形成装置に用いられる一般的な走査
光学装置は、光源ユニットから発生されたレーザ光等
を、シリンドリカルレンズによって偏向器に取付けられ
た多面鏡の反射面に線状に集光させ、多面鏡の回転によ
って偏向走査し、ｆθレンズを経て像担持体である感光
体ドラム上の感光体に結像させる。2. Description of the Related Art In a general scanning optical apparatus generally used in an image forming apparatus such as a laser beam printer or a laser fax, a laser beam generated from a light source unit is attached to a deflector by a cylindrical lens. The light is condensed linearly on the reflecting surface of the polygonal mirror, deflected and scanned by the rotation of the polygonal mirror, and imaged on the photoconductor on the photoconductor drum, which is an image carrier, through the fθ lens.
【０００３】このとき、ｆθレンズの形状の不均一や取
り付け偏心などにより、被走査面上での走査線に曲が
り、主走査方向の走査線長さの左右差を示す片倍率とい
った現象が生じることは知られている。At this time, due to uneven shape of the fθ lens, mounting eccentricity, etc., the scanning line is bent on the surface to be scanned, and a phenomenon such as one-sided magnification showing a left-right difference in scanning line length in the main scanning direction occurs. Is known.
【０００４】モノクロ画像を被走査面上に形成するとき
は、極端な走査線の曲がり、極端に大きな片倍率がなけ
れば問題ないが、カラー画像を形成する場合、複数の走
査線を重ね合わせ画像形成を行うため、カラー画像を高
精彩に形成するには各色間の走査線ずれを少なくする必
要がある。When forming a monochrome image on the surface to be scanned, there is no problem unless there is an extreme bending of the scanning line and an extremely large one-sided magnification, but when forming a color image, a plurality of scanning lines are superposed on each other. Since the color image is formed, it is necessary to reduce the scanning line deviation between the respective colors in order to form the color image with high definition.
【０００５】カラー画像を形成するにあたり、単一の走
査光学装置を用いて各色を被走査面上に重ねる場合は、
走査線曲がり、片倍率の癖は各色同じになるので、その
影響による色ずれはある程度低減できるが、複数の走査
光学装置と複数の像担持体を組み合わせカラー画像の形
成を行う高速対応の画像形成装置の場合、各色を構成す
る各走査装置の走査線曲がり、片倍率の癖が異なること
で、副走査方向のレジストレーションを合わせても各色
間での走査線のずれが生じ、高精彩なカラー画像を形成
する上では致命的である。In forming a color image, when each color is superimposed on the surface to be scanned using a single scanning optical device,
Since the scanning line bends and the one-sided magnification has the same tendency for each color, the color shift due to that effect can be reduced to some extent, but high-speed image formation that forms a color image by combining multiple scanning optical devices and multiple image carriers. In the case of the device, because the scanning line bending of each scanning device that composes each color and the habit of one-sided magnification are different, even if the registration in the sub-scanning direction is adjusted, the deviation of the scanning line between each color occurs, and high-definition color It is fatal in forming an image.
【０００６】この問題に対して、特開平９−１５９９４
４号公報に示される技術では、結像レンズと像担持体の
間に透明な平行平板を配置し、該平行平板の長手方向の
軸線周りに回動させることで走査線曲がりの補正を行っ
ている。To solve this problem, Japanese Unexamined Patent Publication No. 9-15994
In the technique disclosed in Japanese Patent Publication No. 4, a transparent parallel plate is arranged between the imaging lens and the image carrier, and the scanning line bend is corrected by rotating the parallel plate around the longitudinal axis. There is.
【０００７】あるいは、特開平１１−１９０８２２号公
報に示される技術は、走査レンズに回転支持部を持たせ
走査線の位置ずれの補正を行っている。Alternatively, in the technique disclosed in Japanese Patent Laid-Open No. 11-190822, the scanning lens is provided with a rotation support portion to correct the positional deviation of the scanning line.
【０００８】ここで、従来の画像形成装置について図５
を参照して説明する。図５は、４台の走査光学装置を利
用した従来のカラー画像形成装置の概略断面図である。FIG. 5 shows a conventional image forming apparatus.
Will be described with reference to. FIG. 5 is a schematic sectional view of a conventional color image forming apparatus using four scanning optical devices.
【０００９】Ｙトナー、Ｍトナー、Ｃトナー、Ｂｋトナ
ー用の像担持体としての感光体ドラム、現像手段として
の現像器、回収手段としてのクリーニング装置を有する
４つの独立した、装置本体に対して着脱可能なプロセス
カートリッジ６０，７０，８０，９０を並置して、これ
らプロセスカートリッジ６０，７０，８０，９０で形成
したそれぞれ色の異なるトナー像を、移動体としての転
写ベルト５８（転写材担持体）に吸着された転写材Ｐに
順次に重ねて転写することでフルカラー画像を得る構成
となっている。With respect to four independent apparatus main bodies having a photosensitive drum as an image carrier for Y toner, M toner, C toner and Bk toner, a developing device as a developing means, and a cleaning device as a collecting means. Detachable process cartridges 60, 70, 80, 90 are juxtaposed and toner images of different colors formed by the process cartridges 60, 70, 80, 90 are transferred to a transfer belt 58 (transfer material carrier). ), A full-color image is obtained by sequentially transferring and transferring the transfer material P onto the transfer material P.
【００１０】図５における１２１，１２２，１２３，１
２４は、繰り返し使用される感光体ドラム型の電子写真
感光体（以下「感光体ドラム」という。）であり、所定
の周速度（プロセススピード）をもって回転駆動され
る。121, 122, 123, 1 in FIG.
Reference numeral 24 denotes a photosensitive drum type electrophotographic photosensitive member (hereinafter referred to as “photosensitive drum”) that is repeatedly used, and is rotationally driven at a predetermined peripheral speed (process speed).
【００１１】感光体ドラム１２１，１２２，１２３，１
２４は、回転過程で、帯電手段である１次帯電ローラ
（１次帯電器，図示しない）により所定の極性・電位
（本実施の形態ではマイナス）に一様に帯電処理され、
次いで走査光学装置２００（レーザダイオード、ポリゴ
ンスキャナ、レンズ群、等によって構成される）による
画像露光を受けることにより、それぞれの目的のカラー
画像の第１〜第４の色成分像（例えば、イエロー、マゼ
ンタ、シアン、ブラック成分像）に対応した静電潜像が
形成される。Photoreceptor drums 121, 122, 123, 1
In the rotation process, 24 is uniformly charged to a predetermined polarity / potential (negative in this embodiment) by a primary charging roller (primary charger, not shown) which is a charging unit,
Then, the image is exposed by the scanning optical device 200 (which is constituted by a laser diode, a polygon scanner, a lens group, etc.), whereby the first to fourth color component images (for example, yellow, An electrostatic latent image corresponding to magenta, cyan, and black component images is formed.
【００１２】次いで、静電潜像は、それぞれの画像形成
ステーションの現像ユニットにより現像される。各色の
トナーを収容する現像手段としての現像器１３１，１３
２，１３３，１３４（イエロー、マゼンタ、シアン、ブ
ラック）内のトナーを担持する各現像スリーブは、回転
駆動装置（不図示）によって回転し、現像過程で感光体
ドラム１２１，１２２，１２３，１２４に対向するよう
に配設されている。Next, the electrostatic latent image is developed by the developing unit of each image forming station. Developing devices 131 and 13 as developing means for accommodating toner of each color
The developing sleeves carrying toners in 2, 133, 134 (yellow, magenta, cyan, black) are rotated by a rotation driving device (not shown), and are transferred to the photosensitive drums 121, 122, 123, 124 during the developing process. They are arranged so as to face each other.
【００１３】そして、各現像器内でマイナスに摩擦帯電
されて各現像スリーブに担持された各色のトナーは、各
感光体ドラム１２１，１２２，１２３，１２４に静電的
に現像され、各色のトナー像が形成される。The toners of the respective colors, which are negatively frictionally charged in the respective developing devices and carried on the respective developing sleeves, are electrostatically developed on the respective photosensitive drums 121, 122, 123, 124, and the toners of the respective colors are formed. An image is formed.
【００１４】転写ベルト５８は、各感光体ドラム１２
１，１２２，１２３，１２４と接触しながら、矢印方向
に感光体ドラム１２１，１２２，１２３，１２４とほぼ
同じ周速度をもって回転駆動され、第１〜第４の色成分
像を重ねあわせる。そのため、第１〜第４に取付けられ
る走査光学装置の置き位置精度も非常に厳しくなる。The transfer belt 58 is formed on each of the photosensitive drums 12.
While being in contact with 1, 122, 123, 124, they are rotationally driven in the direction of the arrow at substantially the same peripheral speed as the photosensitive drums 121, 122, 123, 124, and the first to fourth color component images are superimposed. Therefore, the placement accuracy of the scanning optical devices attached to the first to fourth becomes extremely severe.
【００１５】そうした上記走査光学装置を画像形成装置
の本体フレームに組付けるに際して、高剛性の例えば板
金加工によって製作された支持板を本体フレームに設
け、走査光学装置を複数取り付けたりしている。When assembling the above scanning optical device to the main body frame of the image forming apparatus, a supporting plate made of, for example, sheet metal having high rigidity is provided on the main body frame, and a plurality of scanning optical devices are attached.
【００１６】しかしながら上記従来の技術では走査光学
装置を本体フレームに設けられた支持板を介して取り付
けることで、走査光学装置と感光体の間に部品が増え、
走査線の精度を狂わす要因を増やすこととなる。However, in the above-mentioned conventional technique, by mounting the scanning optical device via the support plate provided on the main body frame, the number of parts increases between the scanning optical device and the photoconductor,
This will increase the factors that disturb the accuracy of the scanning line.
【００１７】また上記問題を解決するために特開平１１
−１９６２３８号公報に示すように光学箱に支持部を設
ける方法（方法１）や本体フレームに調整機構を設ける
方法（方法２）などがある。Further, in order to solve the above-mentioned problem, Japanese Patent Laid-Open No. Hei 11
As disclosed in Japanese Patent Application Laid-Open No. 196238/1994, there are a method of providing a support portion on the optical box (method 1) and a method of providing an adjusting mechanism on the main body frame (method 2).
【００１８】[0018]
【発明が解決しようとする課題】しかしながら上記従来
の技術で述べた前者（方法１）では、光学箱の材質が例
えばモールドで成形する場合などでは光学箱が大きくな
り、且つ剛性を上げることが困難となる。However, in the former (method 1) described in the above-mentioned prior art, the optical box becomes large and it is difficult to increase the rigidity when the material of the optical box is, for example, a mold. Becomes
【００１９】またモールド以外の金属系の材質を光学箱
に使用した場合などにはコストアップや重量アップにつ
ながり、好ましくない。If a metal-based material other than the mold is used for the optical box, the cost and weight will increase, which is not preferable.
【００２０】また後者（方法２）では本体フレームに調
整機構を設けているので、サービス交換時に再調整を行
う必要があり、作業性の低下が問題である。Further, in the latter (method 2), since the adjusting mechanism is provided in the main body frame, it is necessary to readjust when exchanging the service, and the workability is deteriorated.
【００２１】本発明は上記の従来技術の課題を解決する
ためになされたもので、その目的とするところは、光学
箱の位置の精度を向上させ、かつ、剛性の高い走査光学
装置及び画像形成装置を提供することにある。The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to improve the accuracy of the position of the optical box and to provide a high-rigidity scanning optical device and image formation. To provide a device.
【００２２】[0022]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る走査光学装置は、光学部品を収容する
光学箱を備える走査光学装置において、前記光学箱を基
台に取り付けるための支持手段と、画像有効部より外側
において前記支持手段に形成された、前記基台との相対
位置を調整する調整手段とを備え、前記支持手段が、画
像有効部より外側で前記基台に固定されていることを特
徴とする。In order to achieve the above object, a scanning optical device according to the present invention is a scanning optical device including an optical box for accommodating optical parts, for mounting the optical box on a base. A support means and an adjusting means formed on the support means outside the image effective portion for adjusting the relative position to the base are provided, and the support means is fixed to the base outside the image effective portion. It is characterized by being.
【００２３】また、本発明に係る走査光学装置は、前記
支持手段が、前記光学箱より剛性の高いことを特徴とす
る。Further, the scanning optical device according to the present invention is characterized in that the supporting means is higher in rigidity than the optical box.
【００２４】また、本発明に係る走査光学装置は、前記
光学部品に、光源手段と、前記光源手段から出射した光
束を偏向走査する偏向手段と、走査光を像担持手段に結
像させる結像手段とのうちの少なくとも１つを含むこと
を特徴とする。Further, in the scanning optical apparatus according to the present invention, the optical component is provided with a light source means, a deflecting means for deflecting and scanning a light beam emitted from the light source means, and an image forming means for forming the scanning light on an image carrying means. And at least one of the means.
【００２５】また、本発明に係る走査光学装置は、前記
光学箱は、該光学箱の位置の基準となる、前記支持手段
と接しない少なくとも１以上の基準手段を備えることを
特徴とする。Further, the scanning optical device according to the present invention is characterized in that the optical box is provided with at least one reference means which is a reference of the position of the optical box and which is not in contact with the supporting means.
【００２６】また、本発明に係る走査光学装置は、前記
基準手段は、前記光学箱の光出射方向の位置の基準とな
る基準手段であることを特徴とする。Further, in the scanning optical apparatus according to the present invention, the reference means is a reference means that serves as a reference for the position of the optical box in the light emission direction.
【００２７】さらに、本発明に係る画像形成装置は、上
記の走査光学装置と、該走査光学装置に走査される像担
持手段とを備えることを特徴とする。Further, an image forming apparatus according to the present invention is characterized by including the above-mentioned scanning optical device and an image carrying means to be scanned by the scanning optical device.
【００２８】上記構成では、支持手段を走査光学装置に
持たせることで、例えば感光体等の像担持手段と走査光
学装置の光学箱との距離のバラツキを減らすことが出来
る。In the above structure, by providing the scanning optical device with the supporting means, it is possible to reduce the variation in the distance between the image carrying means such as the photoconductor and the optical box of the scanning optical device.
【００２９】また、支持手段の材料として光学箱より剛
性の高いものを使用することと本体フレームとの接点を
支持手段に設けることで走査光学装置としての剛性を高
め、さらに光学箱を小さく構成することが出来る。Further, by using a material having a higher rigidity than the optical box as the material of the supporting means and providing a contact point with the main body frame on the supporting means, the rigidity of the scanning optical device is increased and the optical box is made small. You can
【００３０】また、画像有効部より外側に本体フレーム
との締結点及び調整手段を設けることで走査線の調整を
より容易に行うことが出来る。Further, by providing a fastening point with the main body frame and adjusting means on the outer side of the image effective portion, the scanning line can be adjusted more easily.
【００３１】また、調整手段を走査光学装置に持たせる
ことで走査光学装置のサービス交換時に本体上での調整
が不要となり、サービス交換時の作業性が向上出来る。Further, by providing the scanning optical device with the adjusting means, it becomes unnecessary to make an adjustment on the main body at the time of service replacement of the scanning optical device, and the workability at the time of service replacement can be improved.
【００３２】さらに、上記構成では、支持手段と光学箱
を同時に基準面治具などに当接、固定することで正確な
位置決めが出来、光学箱と支持手段の組立で発生する取
付のバラツキを低減することが出来る。Further, in the above structure, the supporting means and the optical box are brought into contact with and fixed to the reference surface jig at the same time, whereby accurate positioning can be performed, and variation in mounting caused by assembling the optical box and the supporting means is reduced. You can do it.
【００３３】[0033]
【発明の実施の形態】以下に図面を参照して、この発明
の好適な実施の形態を例示的に詳しく説明する。ただ
し、この実施の形態に記載されている構成部品の寸法、
材質、形状、その相対配置などは、特に特定的な記載が
ない限りは、この発明の範囲をそれらのみに限定する趣
旨のものではない。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the dimensions of the components described in this embodiment,
Unless otherwise specified, the material, the shape, the relative arrangement, and the like are not intended to limit the scope of the present invention thereto.
【００３４】また、以下の図面において、既述の図面に
記載された部材と同様の部材には同じ番号を付す。Further, in the following drawings, the same members as those described in the above drawings are designated by the same reference numerals.
【００３５】（走査光学装置の第１の実施形態）まず、
本発明に係る走査光学装置の第１の実施形態について図
１を参照して説明する。図１は、本発明に係る走査光学
装置の第１の実施形態の上部概略図である。(First Embodiment of Scanning Optical Device) First,
A first embodiment of a scanning optical device according to the present invention will be described with reference to FIG. FIG. 1 is a schematic top view of a first embodiment of a scanning optical device according to the present invention.
【００３６】図１に示される走査光学装置は、光源ユニ
ット１から発生されたレーザ光Ｌ１を、シリンドリカル
レンズ２によって偏向器４に取付けられた多面鏡３の反
射面に線状に集光させ、多面鏡３を回転駆動させること
によりレーザ光Ｌ１を偏向走査する。In the scanning optical apparatus shown in FIG. 1, the laser light L1 generated from the light source unit 1 is linearly condensed on the reflecting surface of the polygon mirror 3 attached to the deflector 4 by the cylindrical lens 2, The polygonal mirror 3 is rotationally driven to deflect and scan the laser beam L1.
【００３７】偏向走査されたレーザ光Ｌ１は、屈折光学
素子６からなる屈折部と回折光学素子７からなる回折部
から構成されるｆθレンズに入射され、像担持体である
感光体ドラム１２上の感光体に結像される。The deflected and scanned laser beam L1 is incident on an fθ lens composed of a refracting section composed of the refracting optical element 6 and a diffracting section composed of the diffractive optical element 7, and on the photosensitive drum 12 which is an image carrier. An image is formed on the photoconductor.
【００３８】ここで、感光ドラム１２は、走査光学装置
の部品であるとしても良いし、走査光学装置の部品には
含まれず、図１に示される走査光学装置を備える画像形
成装置の部品であるとしても良い。Here, the photosensitive drum 12 may be a component of the scanning optical device, or is not included in the components of the scanning optical device and is a component of the image forming apparatus including the scanning optical device shown in FIG. Also good.
【００３９】したがって、本発明に係る走査光学装置の
第１の実施形態は、少なくとも光学箱８及び支持部材９
を有して構成される。Therefore, in the first embodiment of the scanning optical device according to the present invention, at least the optical box 8 and the supporting member 9 are provided.
Is configured.
【００４０】そして、本体側板フレーム３０１、３０
２、感光体ドラム１２は走査光学装置の構成要素に含め
ても含めなくとも良い。The body side plate frames 301, 30
2. The photosensitive drum 12 may or may not be included in the components of the scanning optical device.
【００４１】なお、本発明に係る走査光学装置に上記部
材以外の他の部材を含めても良い。The scanning optical device according to the present invention may include members other than the above members.
【００４２】また、本実施形態で示される回折光学素子
は、ｆθレンズを構成する他の非球面レンズに置き換え
ることが可能である。Further, the diffractive optical element shown in this embodiment can be replaced with another aspherical lens which constitutes the fθ lens.
【００４３】上記光学部品を収納する光学箱８は樹脂成
形品であり、板金加工で作られた支持部材９を介して本
体側板フレーム３０１、３０２に取付けられている。The optical box 8 for accommodating the above-mentioned optical parts is a resin molded product, and is attached to the main body side plate frames 301 and 302 through the support member 9 made by sheet metal working.
【００４４】ただし、光学箱８が取り付けられるのは本
体側板フレーム３０１、３０２に限定されるものではな
く、走査光学装置のフレームを構成する部分（基台）で
あれば良い。However, the optical box 8 is not limited to being attached to the main body side plate frames 301 and 302, but may be any portion (base) that constitutes the frame of the scanning optical device.
【００４５】支持部材９は走査光学装置に一体となって
おり、走査光学装置を本体に組付ける時にも一体的に取
付けられる。The support member 9 is integrated with the scanning optical device, and is also integrally attached when the scanning optical device is assembled to the main body.
【００４６】走査線の傾きを調整する調整機構１１は支
持部材９に設けられ、画像有効部ａ１より外側の締結部
ａ２の一端において配置されている。An adjusting mechanism 11 for adjusting the inclination of the scanning line is provided on the support member 9 and arranged at one end of the fastening portion a2 outside the image effective portion a1.
【００４７】ここで、画像有効部ａ１とは、光学箱８か
ら出射された光により走査される領域のことをいう。Here, the image effective portion a1 is a region scanned by the light emitted from the optical box 8.
【００４８】次に、図１に示される走査光学装置の取り
付け機構について図２を参照して説明する。図２は、図
１に示される走査光学装置の取り付け機構の概略図であ
る。Next, the mounting mechanism of the scanning optical device shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a schematic view of a mounting mechanism of the scanning optical device shown in FIG.
【００４９】図２は走査光学装置が本体フレーム（３０
１〜３０３）に取付けられる構成を示す。図２中の４１
０〜４３０は走査光学装置が取り付く本体フレーム側の
穴を示す。In FIG. 2, the scanning optical device has a main body frame (30
1 to 303). 41 in FIG.
Reference numerals 0 to 430 denote holes on the body frame side to which the scanning optical device is attached.
【００５０】ｚ方向（図２中）は支持部４１３，４２
３，４３３の３点で支持されている。ｘ方向（図２中）
は突き当て部４１１，４２１で支持されている。ｙ方向
は支持部材に設けられたピン１０と本体フレームに設け
られた長穴形状の穴４４０に嵌合して規制される。In the z direction (in FIG. 2), the supporting portions 413, 42
It is supported by three points of 3,433. x direction (in Fig. 2)
Are supported by abutting portions 411, 421. The y direction is regulated by fitting into the pin 10 provided on the support member and the oblong hole 440 provided on the main body frame.
【００５１】そして走査光学装置はその端部が本体フレ
ームの穴４１０、４２０、４３０を貫通する形で組付け
られ、弾性部材などで本体フレームに付勢される。The scanning optical device is assembled such that its end portion penetrates the holes 410, 420, 430 of the main body frame, and is biased to the main body frame by an elastic member or the like.
【００５２】本体側板フレーム３０１、３０２と穴４４
０は走査光学装置と感光体ドラム１２のｘ方向、ｙ方向
及びｚ方向（図中）の相対位置を規制している。Body side plate frames 301, 302 and holes 44
0 regulates the relative positions of the scanning optical device and the photosensitive drum 12 in the x, y, and z directions (in the figure).
【００５３】本発明により支持部材９を光学箱８に取付
けた状態で走査光学装置として走査線の傾き、片倍率を
保証することが出来、感光体ドラム１２との相対位置精
度は本体側板フレーム要因のみであるため、従来例で説
明した走査光学装置を取付ける台のバラツキを排除する
ことが出来る。According to the present invention, the inclination of the scanning line and the one-sided magnification can be assured as a scanning optical device with the support member 9 attached to the optical box 8, and the relative positional accuracy with respect to the photosensitive drum 12 is a main body side plate frame factor. Therefore, it is possible to eliminate the variation of the table on which the scanning optical device described in the conventional example is mounted.
【００５４】また、調整機構１１を画像有効部より外側
に配置することで調整における敏感度を下げることが出
来る。Further, by arranging the adjusting mechanism 11 outside the image effective portion, it is possible to reduce the sensitivity in adjustment.
【００５５】また、光学箱よりも剛性の高い例えば板金
加工して作成した支持部材を使用することで従来例で示
した特開平１１−１９６２３８号公報のような補強を兼
ねた大きな光学箱にする必要がなく、光学箱を小さくす
ることが出来る。ただし、本発明に係る支持部材は光学
箱よりも剛性が高い場合に限定されるものではない。Also, by using a supporting member having a rigidity higher than that of the optical box, for example, sheet metal working, a large optical box also serving as a reinforcement as in Japanese Patent Application Laid-Open No. 11-196238 shown in the prior art. There is no need, and the optical box can be made smaller. However, the support member according to the present invention is not limited to the case where the support member has higher rigidity than the optical box.
【００５６】ここで、図３に、図１で示す本体側板フレ
ーム３０１〜３０３を利用し、樹脂光学箱のみで設計し
た従来例の走査光学装置と本発明との固有振動数をシミ
ュレーションで比較した結果の表を示す。図３の表にお
いて、表の上側が従来の走査光学装置の例であり、表の
下側が本発明の走査光学装置の例である。この結果から
本発明の走査光学装置の方が剛性が高いことが判る。Here, in FIG. 3, the natural frequencies of the conventional scanning optical device designed only with the resin optical box and the present invention using the body side plate frames 301 to 303 shown in FIG. 1 are compared by simulation. A table of the results is shown. In the table of FIG. 3, the upper side of the table is an example of a conventional scanning optical device, and the lower side of the table is an example of the scanning optical device of the present invention. From this result, it is understood that the scanning optical device of the present invention has higher rigidity.
【００５７】（走査光学装置の第２の実施形態）次に、
本発明に係る走査光学装置の第２の実施形態について図
４を参照して説明する。図４は、本発明に係る走査光学
装置の第２の実施形態の上部概略図である。ただし、図
４に示される例では、図１に示された本体側板フレーム
は省略している。(Second Embodiment of Scanning Optical Device) Next,
A second embodiment of the scanning optical device according to the present invention will be described with reference to FIG. FIG. 4 is a schematic top view of a second embodiment of the scanning optical device according to the present invention. However, in the example shown in FIG. 4, the main body side plate frame shown in FIG. 1 is omitted.
【００５８】図４に示される走査光学装置では、光学箱
８の出射面（図中ｘ方向）に支持部材９と接しない基準
面２１、２２が設けられている。In the scanning optical device shown in FIG. 4, reference planes 21 and 22 that are not in contact with the support member 9 are provided on the emission surface (the x direction in the drawing) of the optical box 8.
【００５９】位置決め治具５０１、５０４は、図２で示
した本体側板フレームで走査光学装置のｘ方向位置決め
を行う突き当て部４１１及び４２１と同じ位置に配置さ
れている。また、突き当て治具５０２、５０３は光学箱
に設けられている基準面２１、２２と同じ位置に配置さ
れている。The positioning jigs 501 and 504 are arranged at the same positions as the abutting portions 411 and 421 for positioning the scanning optical device in the x direction on the body side plate frame shown in FIG. Further, the abutting jigs 502 and 503 are arranged at the same positions as the reference planes 21 and 22 provided in the optical box.
【００６０】光学箱８と支持部材９とは各々の位置決め
治具５０１、突き当て治具５０２，５０３、位置決め治
具５０４にｘ方向（突き当て方向）でクランプされ、締
結される。The optical box 8 and the support member 9 are clamped and fastened to the respective positioning jigs 501, abutting jigs 502 and 503, and the positioning jig 504 in the x direction (abutting direction).
【００６１】尚、位置決め治具５０１、５０４及び突き
当て治具５０２，５０３は定盤など高剛性で一体的な構
成で且つ、ｘ方向には必要な精度に調整されている。The positioning jigs 501 and 504 and the abutting jigs 502 and 503 have a highly rigid and integral structure such as a surface plate, and are adjusted to the required accuracy in the x direction.
【００６２】ただし、本発明に係る基準手段としての基
準面は、上記実施形態のようにｘ方向の基準となる基準
面に限定されるものではなく、その他の方向の基準面で
あっても良い。However, the reference surface as the reference means according to the present invention is not limited to the reference surface serving as the reference in the x direction as in the above embodiment, and may be the reference surface in other directions. .
【００６３】このように、本発明に係る走査光学装置の
第２の実施形態でも、支持部材９により光学箱８の相対
位置を調整でき、前述の走査光学装置の第１の実施形態
と同様の効果を得ることができると共に、光学箱８と支
持部材９は各々の位置決め治具５０１、突き当て治具５
０２，５０３、位置決め治具５０４にｘ方向（突き当て
方向）でクランプされ、締結されることから、光学箱８
のさらに正確な位置決めを行うことができる。As described above, also in the second embodiment of the scanning optical device according to the present invention, the relative position of the optical box 8 can be adjusted by the supporting member 9, and the same as in the first embodiment of the scanning optical device described above. The optical box 8 and the supporting member 9 can be provided with the respective effects of the positioning jig 501 and the abutting jig 5 while achieving the effect.
02, 503 and the positioning jig 504 are clamped and fastened in the x direction (abutting direction).
Can be positioned more accurately.
【００６４】（画像形成装置の実施形態）次に本発明に
係る画像形成装置の実施形態について説明する。本発明
に係る画像形成装置の実施形態は、上記本発明に係る走
査光学装置の第１の実施形態、若しくは第２の実施形態
を具備した実施形態である。(Embodiment of Image Forming Apparatus) Next, an embodiment of the image forming apparatus according to the present invention will be described. The embodiment of the image forming apparatus according to the present invention is an embodiment including the first embodiment or the second embodiment of the scanning optical device according to the present invention.
【００６５】すなわち、上記第１の実施形態、若しくは
第２の実施形態として示された走査光学装置により感光
ドラムなどの像担持手段を走査し、この走査された画像
に基づいてシート材に画像形成を行なう画像形成手段を
備える画像形成装置である。That is, the image bearing means such as the photosensitive drum is scanned by the scanning optical device shown in the first embodiment or the second embodiment, and an image is formed on the sheet material based on the scanned image. The image forming apparatus is provided with an image forming unit for performing.
【００６６】また、本発明に係る画像形成装置の実施形
態が適用される装置としては、プリンタ、ＦＡＸ、複写
機等を挙げることができる。Further, as an apparatus to which the embodiment of the image forming apparatus according to the present invention is applied, a printer, a FAX, a copying machine and the like can be mentioned.
【００６７】したがって、本発明に係る画像形成装置の
実施形態においては、前述の本発明に係る走査光学装置
の第１の実施形態及び第２の実施形態と同様の効果を得
ることができる。Therefore, in the embodiment of the image forming apparatus according to the present invention, it is possible to obtain the same effects as those of the first and second embodiments of the scanning optical apparatus according to the present invention described above.
【００６８】[0068]
【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有する。従来、本体フ
レームに設けられていた支持手段を走査光学装置に設け
ることで、感光体ドラム等の像担持手段と走査光学装置
との相対位置精度のバラツキを低減することが出来る。Since the present invention is constructed as described above, it has the following effects. Conventionally, by providing the scanning optical device with the supporting means provided in the main body frame, it is possible to reduce variations in relative positional accuracy between the image bearing means such as the photosensitive drum and the scanning optical device.
【００６９】また、光学箱より剛性の高い部材を支持手
段として使うことで走査光学装置自身の固有振動数を上
げることや光学箱を小さく構成することが出来る。Further, by using a member having a rigidity higher than that of the optical box as the supporting means, the natural frequency of the scanning optical device itself can be increased and the optical box can be made small.
【００７０】また、調整手段や本体への締結点を画像有
効部より外側に配置することで走査線の調整敏感度を鈍
感にし、経時変化にも強い安定した装置を提供できる。Further, by disposing the adjusting means and the fastening point to the main body on the outer side of the image effective portion, it is possible to provide a stable apparatus which is insensitive to the adjustment sensitivity of the scanning line and is resistant to aging.
【００７１】また、調整手段を走査光学装置に設けるこ
とで走査光学装置のサービス交換時に調整を省略するこ
とが出来、作業性を向上することが出来る。By providing the adjusting means in the scanning optical device, the adjustment can be omitted when the service of the scanning optical device is replaced, and the workability can be improved.
【００７２】また、光学箱と支持手段の締結を治具で行
うための基準手段を光学箱及び支持手段に設けることで
取付け時のバラツキを抑えることが出来る。Further, by providing the optical box and the supporting means with the reference means for fastening the optical box and the supporting means with the jig, it is possible to suppress the variation at the time of mounting.
【００７３】これにより本発明では走査光学装置として
の機能を損なうことなく、安定した走査線が得られ、良
質な画像を提供することが可能となる。As a result, according to the present invention, stable scanning lines can be obtained without impairing the function of the scanning optical device, and a high quality image can be provided.
【図１】本発明に係る走査光学装置の第１の実施形態の
上部概略図である。FIG. 1 is a schematic top view of a first embodiment of a scanning optical device according to the present invention.
【図２】図１に示される走査光学装置の取り付け機構の
概略図である。FIG. 2 is a schematic view of a mounting mechanism of the scanning optical device shown in FIG.
【図３】図１で示す本体側板フレーム３０１〜３０３を
利用し、樹脂光学箱のみで設計した従来例の走査光学装
置と本発明との固有振動数をシミュレーションで比較し
た結果の表である。FIG. 3 is a table showing results of simulation comparison of natural frequencies of a conventional scanning optical device designed only with a resin optical box and main body side plate frames 301 to 303 shown in FIG. 1 and the present invention.
【図４】本発明に係る走査光学装置の第２の実施形態の
上部概略図である。FIG. 4 is a schematic top view of a second embodiment of a scanning optical device according to the present invention.
【図５】４台の走査光学装置を利用した従来のカラー画
像形成装置の概略断面図である。FIG. 5 is a schematic sectional view of a conventional color image forming apparatus using four scanning optical devices.
１ 光源ユニット（光源手段） ２ シリンドリカルレンズ ３ 多面鏡 ４ 偏向器（偏向手段） ６ 屈折光学素子（結像手段） ７ 回折光学素子（結像手段） ８ 光学箱 ９ 支持部材（支持手段） １０ ピン １１ 調整機構（調整手段） １２ 感光体ドラム（像担持手段） ２１，２２ 基準面（基準手段） ５８ 転写ベルト ６０，７０，８０，９０ プロセスカートリッジ １２１，１２２，１２３，１２４ 感光体ドラム １３１，１３２，１３３，１３４ 現像器 ２００ 走査光学装置 ３０１，３０２ 本体側板フレーム（基台） ４１０ 穴 ４１１ 突き当て部 ４１３ 支持部 ４２０ 穴 ４２１ 突き当て部 ４２３ 支持部 ４３０ 穴 ４３３ 支持部 ４４０ 穴 ５０１ 位置決め治具 ５０２，５０３ 突き当て治具 ５０４ 位置決め治具 1 Light source unit (light source means) 2 Cylindrical lens 3 polygon mirror 4 Deflector (deflecting means) 6 Refractive optical element (imaging means) 7 Diffractive optical element (imaging means) 8 optical box 9 Support member (support means) 10 pin 11 Adjustment mechanism (adjustment means) 12 Photosensitive drum (image bearing means) 21,22 Reference plane (reference means) 58 transfer belt 60, 70, 80, 90 process cartridge 121,122,123,124 Photosensitive drum 131,132,133,134 developing device 200 scanning optics 301,302 Main body side plate frame (base) 410 holes 411 butting part 413 Support 420 holes 421 butting part 423 Support 430 holes 433 Support 440 holes 501 Positioning jig 502,503 Butt jig 504 Positioning jig
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐野 敦史 東京都大田区下丸子３丁目30番２号 キヤ ノン株式会社内 Ｆターム(参考） 2C362 DA02 2H045 DA01 DA04 DA41 5C051 AA02 CA07 DC07 FA01 5C072 AA03 DA02 DA04 DA23 EA10 HA02 HA09 HA12 QA14 XA05 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Atsushi Sano 3-30-2 Shimomaruko, Ota-ku, Tokyo Non non corporation F-term (reference) 2C362 DA02 2H045 DA01 DA04 DA41 5C051 AA02 CA07 DC07 FA01 5C072 AA03 DA02 DA04 DA23 EA10 HA02 HA09 HA12 QA14 XA05
Claims (6)
光学装置において、 前記光学箱を基台に取り付けるための支持手段と、 画像有効部より外側において前記支持手段に形成され
た、前記基台との相対位置を調整する調整手段とを備
え、 前記支持手段が、画像有効部より外側で前記基台に固定
されていることを特徴とする走査光学装置。1. A scanning optical device comprising an optical box for accommodating an optical component, wherein said base is formed on said support means outside said image effective portion, and supporting means for attaching said optical box to said base. And an adjusting unit that adjusts a relative position of the supporting unit and the supporting unit, the supporting unit being fixed to the base outside the image effective portion.
記載の走査光学装置。2. The scanning optical device according to claim 1, wherein the supporting means has a rigidity higher than that of the optical box.
と、 走査光を像担持手段に結像させる結像手段とのうちの少
なくとも１つを含むことを特徴とする請求項１又は２に
記載の走査光学装置。3. The optical component includes at least one of a light source means, a deflecting means for deflecting and scanning a light beam emitted from the light source means, and an image forming means for forming an image of the scanning light on an image carrying means. The scanning optical device according to claim 1, further comprising:
少なくとも１以上の基準手段を備えることを特徴とする
請求項１から３のいずれか１項に記載の走査光学装置。4. The optical box according to claim 1, further comprising at least one reference means which is a reference of a position of the optical box and which is not in contact with the supporting means. A scanning optical device as described.
あることを特徴とする請求項４に記載の走査光学装置。5. The scanning optical device according to claim 4, wherein the reference unit is a reference unit that serves as a reference for the position of the optical box in the light emission direction.
載の走査光学装置と、 該走査光学装置に走査される像担持手段とを備えること
を特徴とする画像形成装置。6. An image forming apparatus comprising: the scanning optical device according to any one of claims 1 to 5; and an image holding unit which is scanned by the scanning optical device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001398150A JP2003195206A (en) | 2001-12-27 | 2001-12-27 | Scanning optical device and image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001398150A JP2003195206A (en) | 2001-12-27 | 2001-12-27 | Scanning optical device and image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003195206A true JP2003195206A (en) | 2003-07-09 |
Family
ID=27603699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001398150A Withdrawn JP2003195206A (en) | 2001-12-27 | 2001-12-27 | Scanning optical device and image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003195206A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006259434A (en) * | 2005-03-18 | 2006-09-28 | Seiko Epson Corp | Optical scanner |
| JP2006259435A (en) * | 2005-03-18 | 2006-09-28 | Seiko Epson Corp | Optical scanner |
| US7453615B2 (en) | 2005-02-21 | 2008-11-18 | Ricoh Company, Ltd. | Optical scanning apparatus having support members outside the housing for supporting a housing and reflectors, including a pair of ribs and warp preventing member engage with groove formed by ribs, and an image forming apparatus including the same |
| US8824022B2 (en) | 2003-09-18 | 2014-09-02 | Ricoh Company, Ltd. | Optical scanning apparatus and image forming apparatus |
-
2001
- 2001-12-27 JP JP2001398150A patent/JP2003195206A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8824022B2 (en) | 2003-09-18 | 2014-09-02 | Ricoh Company, Ltd. | Optical scanning apparatus and image forming apparatus |
| US7453615B2 (en) | 2005-02-21 | 2008-11-18 | Ricoh Company, Ltd. | Optical scanning apparatus having support members outside the housing for supporting a housing and reflectors, including a pair of ribs and warp preventing member engage with groove formed by ribs, and an image forming apparatus including the same |
| US7619797B2 (en) | 2005-02-21 | 2009-11-17 | Ricoh Company, Ltd. | Optical scanning apparatus and image forming apparatus |
| JP2006259434A (en) * | 2005-03-18 | 2006-09-28 | Seiko Epson Corp | Optical scanner |
| JP2006259435A (en) * | 2005-03-18 | 2006-09-28 | Seiko Epson Corp | Optical scanner |
| JP4609127B2 (en) * | 2005-03-18 | 2011-01-12 | セイコーエプソン株式会社 | Optical scanning device and image forming apparatus |
| JP4609128B2 (en) * | 2005-03-18 | 2011-01-12 | セイコーエプソン株式会社 | Optical scanning device and image forming apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050301 |