JP4413110B2

JP4413110B2 - Optical writing apparatus and image forming apparatus

Info

Publication number: JP4413110B2
Application number: JP2004269197A
Authority: JP
Inventors: 康太竹中; 和典坂内; 巌松前; 登楠瀬; 嘉信坂上; 宏三山崎
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2004-09-16
Filing date: 2004-09-16
Publication date: 2010-02-10
Anticipated expiration: 2024-09-16
Also published as: JP2006091034A

Description

本発明は光書き込み装置及び画像形成装置に関する。 The present invention relates to an optical writing device and an image forming apparatus.

一般に、プリンタ、複写機、ファクシミリ、これらの複合機能を有する複合機などの画像形成装置として、例えば、従来、複数の光源から出射される光ビームを、並設された４つの像担持体（例えば、感光体ドラム）に照射して潜像の書き込みを行い、各像担持体上に形成された潜像を異なる色の現像剤（例えば、イエロー、マゼンタ、シアン、ブラックのトナー）でそれぞれ現像して可視像化した後、転写搬送ベルト等に担持された記録用紙等の転写材を各像担持体の転写部に順次搬送し、各像担持体上に形成された各色の可視像を転写材に重ね合わせて転写した後、転写材上に転写された画像を定着して多色画像を得るタンデム方式のカラー画像形成装置がある。 In general, as an image forming apparatus such as a printer, a copying machine, a facsimile machine, or a multifunction machine having these combined functions, for example, conventionally, four image carriers (for example, light beams emitted from a plurality of light sources are arranged in parallel) The photosensitive drum is irradiated to write a latent image, and the latent image formed on each image carrier is developed with different color developers (for example, yellow, magenta, cyan, and black toners). Then, the transfer material such as recording paper carried on the transfer conveyance belt or the like is sequentially conveyed to the transfer portion of each image carrier, and the visible image of each color formed on each image carrier is obtained. There is a tandem type color image forming apparatus that obtains a multicolor image by fixing an image transferred onto a transfer material after being transferred onto the transfer material.

このようなタンデム方式のカラー画像形成装置に使用される光書き込み装置として、特許文献１に記載されているように、複数の光源と、この複数の光源からの光ビームを対称な２方向に振り分けて偏向する光偏向手段と、この光偏向手段を中心にして２方向に対称に配置され、光偏向手段により偏向走査される複数の光ビームをそれぞれ対応する被走査面上に導き結像する光学系を備え、複数の光源、光偏向手段及び光学系を一つのハウジングに収納した光書き込み装置が知られている。
特開２００２−１９６２６９号公報 As an optical writing device used in such a tandem color image forming apparatus, as described in Patent Document 1, a plurality of light sources and light beams from the plurality of light sources are distributed in two symmetrical directions. Optical deflecting means that deflects the light, and an optical that is arranged symmetrically in two directions with the light deflecting means as the center, and that guides and forms an image on a corresponding scanned surface by deflecting and scanning the plurality of light beams by the light deflecting means 2. Description of the Related Art An optical writing apparatus that includes a system and includes a plurality of light sources, light deflecting means, and an optical system housed in a single housing is known.
JP 2002-196269 A

この特許文献１に記載の光書き込み装置においては、ハウジング内の光偏向手段の周辺であって、光偏向手段による光ビームの偏向走査領域外に、２方向に配置され互いに対向する光学系からの反射・散乱光（フレア光）を遮光する遮光部材を設けている。 In the optical writing apparatus described in Patent Document 1, the optical writing device is arranged in two directions around the optical deflecting means in the housing and outside the deflection scanning area of the light beam by the optical deflecting means. A light shielding member for shielding reflected / scattered light (flare light) is provided.

ところで、上述したような光書き込み装置においては、光偏向手段を周辺が高い壁面で囲まれる収容部（以下「ポリゴン部屋」という。）に収容するが、光偏向手段を駆動するためには駆動回路基板とハーネスなどの接続手段で接続しなければならないため、例えばポリゴン部屋の隣りに回路基板を収容する基板収容部屋を形成して、ポリゴン部屋の壁面のうちの基板収容部屋との壁面の一部に切り欠き部を形成し、この切り欠き部を通じてハーネスを這い回す構成とする。 By the way, in the optical writing apparatus as described above, the optical deflecting means is accommodated in an accommodating portion (hereinafter referred to as “polygon room”) surrounded by a high wall surface. In order to drive the optical deflecting means, a driving circuit is used. For example, a substrate accommodation room for accommodating a circuit board is formed next to the polygon room, and a part of the wall surface of the polygon room with the substrate accommodation room must be connected to the board by a connecting means such as a harness. A notch is formed in the harness, and the harness is wound around through the notch.

そのため、ポリゴン部屋の切り欠き部を閉じるための仕切り部材が必要になり、また、光偏向手段とハーネスとの干渉を避けるためにハーネスを押える押え部材が必要になる。 Therefore, a partition member for closing the notch portion of the polygon room is required, and a pressing member for pressing the harness is required to avoid interference between the light deflection means and the harness.

このように、従来の光書き込み装置にあっては、ポリゴン部屋に仕切り部材、押え部材、あるいは前述した遮光部材など、複数の細かい部品が配置されるため、組み付け作業性が悪く、コスト的にも高くなるという課題がある。 As described above, in the conventional optical writing apparatus, since a plurality of fine parts such as a partition member, a pressing member, or the above-described light shielding member are arranged in the polygon room, the assembling workability is poor and the cost is low. There is a problem of becoming higher.

本発明は上記の課題に鑑みてなされたものであり、部品点数を削減して組み付け作業を向上しコストの低減を図った光書き込み装置及びこれを備えた画像形成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 problems, and an object thereof is to provide an optical writing apparatus that reduces the number of parts, improves assembly work, and reduces costs, and an image forming apparatus including the same. To do.

上記の課題を解決するため、本発明に係る光書き込み装置は、光偏向手段を収容する収容部の切り欠き部を閉じるための仕切り手段、フレア光を防止するための遮光手段及び光偏向手段への接続手段を押える押さえ手段の少なくとも２つを兼ねた部材を設けた構成としたものである。 In order to solve the above-described problems, an optical writing apparatus according to the present invention is provided with a partition unit for closing a cutout portion of a storage unit that stores a light deflection unit, a light blocking unit for preventing flare light, and a light deflection unit. In this configuration, a member serving as at least two pressing means for pressing the connecting means is provided.

本発明に係る画像形成装置は、本発明に係る光書き込み装置を備えたものである。 An image forming apparatus according to the present invention includes the optical writing device according to the present invention.

本発明に係る光書き込み装置によれば、仕切り手段、遮光手段及び押さえ手段の少なくとも２つを兼ねた部材を設けたので、部品点数が削減され、組み付け作業性が向上するとともにコストの低減を図ることができる。 According to the optical writing device of the present invention, since the member serving as at least two of the partitioning means, the light shielding means, and the pressing means is provided, the number of parts is reduced, the assembling workability is improved, and the cost is reduced. be able to.

本発明に係る画像形成装置によれば、仕切り手段、遮光手段及び押さえ手段の少なくとも２つを兼ねた部材を設け光書き込み装置を備えたので、部品点数が削減され、組み付け作業性が向上するとともにコストの低減を図ることができる。 According to the image forming apparatus of the present invention, since the optical writing device is provided by providing the member that serves as at least two of the partitioning unit, the light shielding unit, and the pressing unit, the number of parts is reduced and the assembling workability is improved. Cost can be reduced.

以下、本発明の実施の形態について添付図面を参照して説明する。先ず、本発明に係る画像形成装置の一例の概略について図１を参照して説明する。
この画像形成装置は、装置本体１内に、電子写真方式の画像形成プロセスで画像を形成する装置であり、像担持体としての複数の感光体ドラム２Ｙ、２Ｃ、２Ｍ、２Ｋ（以下、区別しないときは「感光体ドラム２」という。以下の符号の付け方も同様とする。）と、各感光体ドラム２を帯電させる帯電ユニット３と、各感光体ドラム２に対して静電潜像の書き込みを行なう露光手段としての本発明に係る光書き込み装置（光書き込みユニット）４と、各感光体ドラム１の潜像を現像する現像ユニット５と、各感光体ドラム２上のトナー像を中間転写部材（ベルト）１１に転写する転写ユニット６と、各感光体ドラム２の残留トナー及び電荷を除去するクリーニングユニット７を備えるとともに、装置本体１の下側に用紙１３を給紙する給紙装置８を備え、更に用紙２０に転写されたトナー像を定着処理するための定着装置９を備えている。 Embodiments of the present invention will be described below with reference to the accompanying drawings. First, an outline of an example of an image forming apparatus according to the present invention will be described with reference to FIG.
The image forming apparatus is an apparatus that forms an image in the apparatus main body 1 by an electrophotographic image forming process, and a plurality of photosensitive drums 2Y, 2C, 2M, and 2K as image carriers (hereinafter, not distinguished). Sometimes referred to as “photosensitive drum 2” (the same applies to the following reference numerals)), a charging unit 3 for charging each photosensitive drum 2, and writing of an electrostatic latent image to each photosensitive drum 2. The optical writing device (optical writing unit) 4 according to the present invention as an exposure means for performing the above, the developing unit 5 for developing the latent image on each photosensitive drum 1, and the toner image on each photosensitive drum 2 as an intermediate transfer member (Feed) A transfer unit 6 for transferring to a belt 11 and a cleaning unit 7 for removing residual toner and electric charge on each photosensitive drum 2, and a paper feeding device for feeding paper 13 to the lower side of the apparatus main body 1. With 8, further comprising a fixing device 9 for fixing the toner image transferred to the sheet 20.

ここで、この画像形成装置では、図１で左から（中間転写ベルト１１の回転方向上流側から）イエローＹ、シアンＣ、マゼンタＭ、ブラックＫの４つの色の画像を形成し、これを中間転写ベルト１１上で重ねてフルカラーの画像を形成する。なお、ブラックを除くイエローＹ、シアンＣ、マゼンタＭの３色でもフルカラーの画像形成は可能である。 Here, this image forming apparatus forms four color images of yellow Y, cyan C, magenta M, and black K from the left (from the upstream side in the rotation direction of the intermediate transfer belt 11) in FIG. A full color image is formed on the transfer belt 11 in an overlapping manner. Note that full-color image formation is possible even with three colors of yellow Y, cyan C, and magenta M except black.

帯電ユニット３は、ローラ状に形成された導電性ローラからなり、このローラに帯電バイアス電圧を電源装置から供給し、感光体ドラム２表面の感光体層を一様に帯電させる。光書き込み装置４は、画像データに基づいて点灯／消灯する光ビームであるレーザービームを各感光体ドラム２表面に照射することで、感光体ドラム２上に画像に応じた静電潜像を形成する。現像ユニット５は、現像ローラと現像材収容部等で構成され、感光体ドラム２上の静電潜像を顕像化する。 The charging unit 3 is composed of a conductive roller formed in a roller shape, and a charging bias voltage is supplied to the roller from a power supply device to uniformly charge the photosensitive layer on the surface of the photosensitive drum 2. The optical writing device 4 irradiates the surface of each photosensitive drum 2 with a laser beam, which is a light beam that is turned on / off based on image data, thereby forming an electrostatic latent image corresponding to the image on the photosensitive drum 2. To do. The developing unit 5 includes a developing roller and a developer container, and visualizes the electrostatic latent image on the photosensitive drum 2.

転写ユニット６は、感光体ドラム２上でトナーにより顕像化された画像を感光体ドラム２から中間転写体としての中間転写ベルト１１に転写ローラ１２によって転写する。中間転写ベルト１１は、駆動ローラ１４と従動ローラ１５とテンションローラ１６間に掛け渡されており、図示しない駆動モータで回転駆動される駆動ローラ１４によって矢印方向に周回移動する。各感光体ドラム２上に形成されたトナー画像は、中間転写ベルト１１と接触し、中間転写ベルト１１の裏面に配設された転写ローラ１２に所定のバイアス電圧を印加することにより、中間転写ベルト１１上に転写される（これを「一次転写」という。）。 The transfer unit 6 transfers an image visualized with toner on the photosensitive drum 2 from the photosensitive drum 2 to an intermediate transfer belt 11 as an intermediate transfer member by a transfer roller 12. The intermediate transfer belt 11 is stretched between a driving roller 14, a driven roller 15, and a tension roller 16, and rotates in a direction indicated by an arrow by a driving roller 14 that is rotationally driven by a driving motor (not shown). The toner image formed on each photoconductive drum 2 is in contact with the intermediate transfer belt 11 and a predetermined bias voltage is applied to the transfer roller 12 disposed on the back surface of the intermediate transfer belt 11 to thereby transfer the intermediate transfer belt 11. 11 (referred to as “primary transfer”).

クリーニングユニット７は、中間転写ベルト１１に転写後に感光体ドラム２上に残留した現像材及び電荷を次の作像動作の前に除去する。 The cleaning unit 7 removes the developer and charge remaining on the photosensitive drum 2 after being transferred to the intermediate transfer belt 11 before the next image forming operation.

一方、給紙装置８の給紙カセット２１に収容されている転写材としての用紙２０は、給紙ローラ（ピックアップローラ）２２により１枚ずつ分離されて送り出され、レジストローラ２３により２次転写手段としての転写ローラ２４に搬送され、中間転写ベルト１１上で重畳されたフルカラーのトナー画像が用紙２０に転写される（これを「二次転写」という。）。 On the other hand, the sheet 20 as a transfer material accommodated in the sheet feeding cassette 21 of the sheet feeding device 8 is separated and sent out one by one by a sheet feeding roller (pickup roller) 22, and a secondary transfer unit by a registration roller 23. The full-color toner image that is conveyed to the transfer roller 24 and superimposed on the intermediate transfer belt 11 is transferred to the paper 20 (this is referred to as “secondary transfer”).

その後、用紙２０は画像を定着させるために定着装置９に搬送され、定着装置９で加熱、加圧され、画像が定着された後、搬送ローラ２５を経て、排紙ローラ２６から装置外部の排紙トレイ部３０に排出される。 Thereafter, the sheet 20 is conveyed to the fixing device 9 to fix the image, heated and pressed by the fixing device 9, and after the image is fixed, the sheet 20 passes through the conveying roller 25 and is discharged from the discharge roller 26 to the outside of the apparatus. The paper is discharged to the paper tray unit 30.

なお、この画像形成装置では、中間転写ベルト１１に複数の感光体ドラム１０Ｙ、１０Ｃ、１０Ｍ、１０Ｋのそれぞれで形成された色の画像を重ね合わせた後、転写材に転写（これを２次転写という。）する方式のいわゆる中間転写方式のものであるが、感光体ドラム１０Ｙ、１０Ｃ、１０Ｍ、１０Ｋに形成された画像を転写材に直接転写して転写材上で重ね合わせるいわゆる直接転写方式とすることもできる。 In this image forming apparatus, the color image formed by each of the plurality of photosensitive drums 10Y, 10C, 10M, and 10K is superimposed on the intermediate transfer belt 11, and then transferred to a transfer material (secondary transfer). A so-called intermediate transfer method, which is a so-called direct transfer method in which an image formed on the photosensitive drums 10Y, 10C, 10M, and 10K is directly transferred to a transfer material and superimposed on the transfer material. You can also

次に、この画像形成装置に搭載している本発明に係る露光ユニットである光書き込み装置４について図２及び図３を参照して説明する。なお、図２は同光書き込み装置の内部構成を説明する平面説明図、図３は同光書き込み装置の側面説明図である。 Next, the optical writing device 4 which is an exposure unit according to the present invention mounted on the image forming apparatus will be described with reference to FIGS. 2 is an explanatory plan view for explaining the internal configuration of the optical writing apparatus, and FIG. 3 is an explanatory side view of the optical writing apparatus.

この光書き込み装置４は、ハウジング４０に、各感光体ドラム２に対して光レーザーであるレーザービームＬＹ、ＬＣ、ＬＭ、ＬＫを照射するために４つのレーザユニット４１Ｙ、４１Ｍ、４１Ｃ、４１Ｋと、各レーザーユニット４１からの画像信号に基づいて変調されたレーザービームＬを偏向走査する光偏向手段（偏向走査手段）としての２つのポリゴンミラー４２ａ、４２ｂ（両者を併せて「ポリゴンミラー４２」という。）と、偏向走査したレーザービームＬを感光体ドラム２上で所望の大きさに結像させる結像光学系４４と、レーザービームＬの走査開始タイミングを検知する同期検知手段としての同期検知部４５などを備えている。 The optical writing device 4 includes four laser units 41Y, 41M, 41C, and 41K for irradiating the housing 40 with laser beams LY, LC, LM, and LK, which are optical lasers, on the photosensitive drums 2; Two polygon mirrors 42a and 42b as light deflecting means (deflection scanning means) for deflecting and scanning the laser beam L modulated based on the image signal from each laser unit 41 (both are collectively referred to as "polygon mirror 42"). ), An imaging optical system 44 that forms an image of the deflection-scanned laser beam L on the photosensitive drum 2 to a desired size, and a synchronization detection unit 45 as a synchronization detection unit that detects the scanning start timing of the laser beam L. Etc.

ここで、ポリゴンミラー４２はポリゴンモータ４３によって高速で回転駆動され、このポリゴンミラー４２と各レーザーユニット４１の間には、レーザーユニット４１側からアパーチャ４６及びシリンダレンズ４７を配設している。そして、４つのレーザーユニット４１からのレーザービームＬを２つずつ、レーザーユニット４１Ｙ、４１Ｃとレーザーユニット４１Ｍ、４１Ｋに分けてポリゴンミラー４２ａ、４２ｂの両側から入射させる所謂対向走査方式を採用し、ポリゴンミラー４２に片側から２つのレーザービームＬＹ，ＬＣ及びＬＭ，ＬＫを独立に入射させるために、一方の光路にミラー４８Ａ，４８Ｂを配置している。 Here, the polygon mirror 42 is rotationally driven at a high speed by a polygon motor 43, and an aperture 46 and a cylinder lens 47 are disposed between the polygon mirror 42 and each laser unit 41 from the laser unit 41 side. A so-called counter scanning method is adopted in which the laser beams L from the four laser units 41 are divided into laser units 41Y and 41C and laser units 41M and 41K, and are incident on both sides of the polygon mirrors 42a and 42b. In order to allow the two laser beams LY, LC and LM, LK to enter the mirror 42 independently from one side, mirrors 48A, 48B are arranged in one optical path.

なお、ポリゴンミラー４２の回転数が３０、０００ｒｐｍを超える程度に速い場合の騒音対策等のためにポリゴンミラー４２の手前両側に防音ガラス４９、４９を配設している。 Note that soundproof glasses 49 are provided on both sides of the polygon mirror 42 in order to prevent noise when the rotational speed of the polygon mirror 42 is high enough to exceed 30,000 rpm.

また、ポリゴンミラー４２で偏向走査されたレーザービームＬは、再び防音ガラス４９を経て、結像レンズ４４に入射した後、各ミラー５０を経由して、各感光体ドラム２に入射される。この場合、感光体ドラム２表面に対する照射角度は、Ｙ、Ｃ、Ｍ、Ｋ各色のそれぞれでほぼ同一となるように設定している。 Further, the laser beam L deflected and scanned by the polygon mirror 42 passes through the soundproof glass 49 again, enters the imaging lens 44, and then enters each photosensitive drum 2 via each mirror 50. In this case, the irradiation angle with respect to the surface of the photosensitive drum 2 is set to be substantially the same for each of the colors Y, C, M, and K.

なお、光書き込み装置４のハウジング４０の蓋部材５１には感光体ドラム２への射出口に、この光書き込み装置４内への塵埃の侵入等を防ぐために防塵ガラス５２をそれぞれ設けている。 The lid member 51 of the housing 40 of the optical writing device 4 is provided with a dustproof glass 52 at the exit to the photosensitive drum 2 in order to prevent dust from entering the optical writing device 4.

一方、書き込み開始のタイミングを決定するための同期検知は、前記結像レンズ４４を通ったレーザービームＬを同期検知用ミラー６１で折り返し、同期検知部４５に入射されるようにしている。この同期検知部４５は、結像レンズ６２と光電素子を持つ電気回路基板６３と、それらを保持する保持部材６４とで構成している。 On the other hand, in the synchronization detection for determining the writing start timing, the laser beam L that has passed through the imaging lens 44 is turned back by the synchronization detection mirror 61 so as to be incident on the synchronization detection unit 45. The synchronization detection unit 45 includes an electric circuit board 63 having an imaging lens 62 and a photoelectric element, and a holding member 64 that holds them.

なお、同期検知の本来の意味は、走査光のタイミングを取ることであるので、通常走査に先立って設置されていればよいが、この実施形態では、１走査の速度（あるいは時間）の変動を検知するために、走査後端にも検知手段を設置している。図２には、この走査前後で同期を取る構成を示している。この例では、上下２段の走査光を１つの同期検知部４５で検知する。 Note that the original meaning of the synchronization detection is to take the timing of the scanning light, so it may be installed prior to the normal scanning, but in this embodiment, the fluctuation of the speed (or time) of one scanning is detected. In order to detect, a detecting means is also provided at the rear end of scanning. FIG. 2 shows a configuration for synchronizing before and after this scanning. In this example, the upper and lower two stages of scanning light are detected by one synchronization detection unit 45.

次に、本発明に係る光書き込み装置４の第１実施形態について図４ないし図６を参照して説明する。なお、図４は光書き込み装置のポリゴン近傍の斜視説明図、図５は同じくポリゴン近傍の平面説明図、図６は要部断面説明図である。
この実施形態では、光書き込み装置４のハウジング４０に収容部であるポリゴン部屋１０１を形成して、このポリゴン部屋１０１に光偏向手段を構成するポリゴンミラー４２を回転駆動するポリゴンモータ４３を、モータボード１０２をポリゴン部屋１０１の奥側面１０１ａにして取り付けて収容している。 Next, a first embodiment of the optical writing device 4 according to the present invention will be described with reference to FIGS. 4 is an explanatory perspective view of the vicinity of the polygon of the optical writing device, FIG. 5 is an explanatory plan view of the vicinity of the polygon, and FIG.
In this embodiment, a polygon chamber 101 that is a housing portion is formed in the housing 40 of the optical writing device 4, and a polygon motor 43 that rotationally drives a polygon mirror 42 that constitutes an optical deflecting means in the polygon chamber 101 is provided as a motor board. 102 is attached as a back side surface 101a of the polygon room 101 and accommodated.

また、ハウジング４０にはこのポリゴン部屋１０１に隣接して基板収容部である基板収容部屋１０５を形成して、この基板収容部屋１０５内にポリゴンモータ４３を駆動するためのドライバ（駆動回路）を実装した駆動回路基板であるドライバボード１０６を取り付けている。 Further, the housing 40 is formed with a substrate housing chamber 105 which is a substrate housing portion adjacent to the polygon chamber 101, and a driver (driving circuit) for driving the polygon motor 43 is mounted in the substrate housing chamber 105. A driver board 106 which is a drive circuit board is attached.

そして、これらのポリゴン部屋１０１の基板収容部屋１０５との間の壁部の一部に切り欠き部１０３を形成し、この切り欠き部１０３を介してモータボード１０２とドライバボード１０６とを接続手段であるハーネス１０４で電気的に接続している。なお、ハーネス１０４はコネクト部１０２ａ、１０６ａでそれぞれモータボード１０２とドライバボード１０６と接続され、また、コネクタ部１０２ａ、１０６ａの位置関係から途中で蛇行されて配設されている。 Then, a notch 103 is formed in a part of a wall portion between the polygon room 101 and the substrate accommodation room 105, and the motor board 102 and the driver board 106 are connected by a connecting means via the notch 103. A harness 104 is electrically connected. The harness 104 is connected to the motor board 102 and the driver board 106 at the connection portions 102a and 106a, respectively, and is meandered on the way from the positional relationship of the connector portions 102a and 106a.

そして、遮光兼仕切り部材１１０を、ポリゴン部屋１０１の切り欠き部１０３の両側でハウジング４０に取り付け部材１０７で取り付けている。この遮光兼仕切り部材１１０は、切り欠き部１０３に嵌め込まれてポリゴン部屋１０１と基板収納部屋１０５との間を仕切る壁（切り欠き部１０３を閉じる壁）となる仕切り部１１１と、フレア光を遮光する遮光手段である遮光部１１２とを一体に形成した仕切り手段と遮光手段を兼ねた部材である。この場合、遮光兼仕切り部材１１０の仕切り部１１１の底面とハーネス１０４との間には空隙が生じる。 The light shielding / partitioning member 110 is attached to the housing 40 by the attachment member 107 on both sides of the notch 103 of the polygon chamber 101. The light shielding / partitioning member 110 is fitted in the cutout portion 103 and blocks the flare light, and a partition portion 111 that becomes a wall (a wall that closes the cutout portion 103) that partitions the polygon chamber 101 and the substrate storage chamber 105. This is a member that serves as both the light shielding means and the partitioning means integrally formed with the light shielding portion 112 that is the light shielding means. In this case, a gap is generated between the bottom surface of the partition 111 of the light shielding / partitioning member 110 and the harness 104.

また、この遮光兼仕切り部材１１０とは別に、ハーネス１０４を押える押え部材であるハーネスクランブ１１４をポリゴン部屋１０１の奥側面１０１ａから立ち上げて形成している。 In addition to the light shielding / partitioning member 110, a harness clamp 114, which is a pressing member for pressing the harness 104, is formed by being raised from the back side surface 101a of the polygon chamber 101.

このように構成したので、遮光兼仕切り部材１１０と押え部材（ハーネスクランブ）１１４の２つの部材で、仕切り、遮光及び押さえを行うことができて、仕切り、遮光及び押さえをそれぞれ別の部材で行う、つまり３つの部材を用いる場合よりも部品点数（又は部材点数）が削減されて、組み付け作業性が向上し、またコストの低減を図ることができる。 Since it comprised in this way, it can partition, light-shield, and hold | suppress with two members, the light-shielding / partitioning member 110 and the pressing member (harness clamp) 114, and each partition, light-shielding, and pressure | pressure are performed by another member, respectively. That is, the number of parts (or the number of members) is reduced as compared with the case of using three members, so that the assembly workability can be improved and the cost can be reduced.

また、仕切り手段と遮光手段を一体化することによって、図６に示すように、遮光部１１２をポリゴン部屋１０１の奥側面１０１ａから浮かせて、できるだけポリゴンミラー４２に近づけることができるので、モータボード１０２に逃げ用の切り欠きなどを設ける必要がなくなる。 Also, by integrating the partitioning means and the light shielding means, as shown in FIG. 6, the light shielding part 112 can be lifted from the back side surface 101a of the polygon room 101 and can be brought as close to the polygon mirror 42 as possible. It is no longer necessary to provide a notch for escape.

すなわち、図１４及び図１５に示すように、ポリゴン部屋１０１の切り欠き部１０３を閉じるための仕切り部材５０１、フレア光を防止するための遮光部材５０２、光偏向手段への接続手段であるハーネス１０４を押える押さえ部材５０３を設ける場合に比べて部材点数を削減することができる。また、この場合、図１６に示すように、遮光部材５０２はポリゴン部屋１０１の奥側面１０１ａから立ち上げて形成しなければならないため、遮光部材５０２をポリゴンミラー６２に近づけるためには、図１５に示すように、モータボード１０２に逃げ用の切り欠き１０２ｂを形成しなければならなくなる。これに対して、上記実施形態では、遮光部１１２をポリゴン部屋１０１の奥側面１０１ａから浮かせて形成することができるので、このような切り欠き１０２ｂが必要でなくなる。 That is, as shown in FIGS. 14 and 15, a partition member 501 for closing the notch 103 of the polygon chamber 101, a light shielding member 502 for preventing flare light, and a harness 104 as a connection means to the light deflection means. The number of members can be reduced as compared with the case where the pressing member 503 that holds the pressure is provided. Also, in this case, as shown in FIG. 16, the light shielding member 502 must be formed up from the back side surface 101a of the polygon chamber 101. Therefore, in order to bring the light shielding member 502 close to the polygon mirror 62, FIG. As shown, a relief notch 102b must be formed in the motor board 102. On the other hand, in the above embodiment, since the light shielding portion 112 can be formed floating from the back side surface 101a of the polygon room 101, such a notch 102b is not necessary.

次に、本発明に係る光書き込み装置４の第２実施形態について図７及び図８を参照して説明する。なお、図７は光書き込み装置のポリゴン近傍の斜視説明図、図８は同じくポリゴン近傍の平面説明図である。
この実施形態では、遮光兼押えさ部材１２０をポリゴン部屋１０１の奥側面１０１ａ（ハウジング４０でもある。）に取り付け部材１２７によって取り付けている。この遮光兼押さえ部材１２０は、フレア光を遮光する遮光手段である遮光部１２２とハーネス１０４を押える押え手段である押さえ部１２３を一体に形成した遮光手段と押え手段を兼ねた部材である。 Next, a second embodiment of the optical writing device 4 according to the present invention will be described with reference to FIGS. 7 is an explanatory perspective view of the vicinity of the polygon of the optical writing device, and FIG. 8 is an explanatory plan view of the vicinity of the polygon.
In this embodiment, the light shielding / pressing member 120 is attached to the back side surface 101 a (also the housing 40) of the polygon chamber 101 by the attachment member 127. The light shielding / holding member 120 is a member that serves as both a light shielding means and a pressing means integrally formed with a light shielding portion 122 that is a light shielding means for shielding flare light and a pressing portion 123 that is a pressing means for pressing the harness 104.

また、これとは別に、ポリゴン部屋１０１の切り欠き部１０３に嵌め込んでポリゴン部屋１０１と基板収納部屋１０５との間を仕切る壁（切り欠き部１０３を閉じる壁）となる仕切り部材１２１を、取り付け部材１０７でハウジング４０に取り付けている。 Separately, a partition member 121 that is fitted into the cutout portion 103 of the polygon chamber 101 and serves as a wall (a wall that closes the cutout portion 103) that partitions the polygon chamber 101 and the substrate storage chamber 105 is attached. The member 107 is attached to the housing 40.

このように構成したので、遮光兼押さえ部材１２０と仕切り部材１２１の２つの部材で、遮光、仕切り及び押さえを行うことができて、遮光、仕切り及び押さえをそれぞれ別の部材で行う、つまり３つの部材を用いる場合よりも部品点数（又は部材点数）が削減されて、組み付け作業性が向上し、またコストの低減を図ることができる。 Since it comprised in this way, light shielding, a partition, and a press can be performed with two members, the light shielding / holding member 120 and the partition member 121, and light shielding, a partition, and a press are each performed by another member, that is, three The number of parts (or the number of members) is reduced as compared with the case of using members, so that the assembly workability can be improved and the cost can be reduced.

なお、この実施形態では、モータボード１０２に遮光兼押さえ部材１２０の遮光部１２２から逃げるための切り欠き１０２ａを形成しているが、遮光兼押さえ部材１２０の遮光部１２２の先端部分を、モータボード１０２を避けるように逃がすことで、モータボード１０２の切り欠き１０２ａは形成しなくても良い。 In this embodiment, the motor board 102 is formed with the notch 102a for escaping from the light shielding portion 122 of the light shielding / holding member 120. However, the front end portion of the light shielding portion 122 of the light shielding / holding member 120 is connected to the motor board. The notch 102a of the motor board 102 may not be formed by escaping so as to avoid 102.

次に、本発明に係る光書き込み装置４の第３実施形態について図９及び図１０を参照して説明する。なお、図９は光書き込み装置のポリゴン近傍の斜視説明図、図１０は同じくポリゴン近傍の平面説明図である。
この実施形態では、仕切り兼押さえ部材１３０を、ポリゴン部屋１０１の切り欠き部１０３の両側でハウジング４０に取り付け部材１０７で取り付けている。この仕切り兼押さえ部材１３０は、切り欠き部１０３に嵌め込まれてポリゴン部屋１０１と基板収納部屋１０５との間を仕切る壁（切り欠き部１０３を閉じる壁）となる仕切り手段及びハーネス１０４を押える押さえ手段を兼ねた部材である。 Next, a third embodiment of the optical writing device 4 according to the present invention will be described with reference to FIGS. 9 is an explanatory perspective view of the vicinity of the polygon of the optical writing device, and FIG. 10 is an explanatory plan view of the vicinity of the polygon.
In this embodiment, the partition / holding member 130 is attached to the housing 40 by the attachment member 107 on both sides of the notch 103 of the polygon chamber 101. The partition / holding member 130 is a partition unit that is fitted into the notch 103 and serves as a wall (a wall that closes the notch 103) that partitions the polygon chamber 101 and the substrate storage chamber 105, and a pressing unit that holds the harness 104. It is a member that doubles as

この仕切り兼押さえ部材１３０と前記第２実施形態の仕切り部材１２１との違いは、仕切り兼押さえ部材１３０は、切り欠き部１０３に取り付けた状態で仕切り兼押さえ部材１３０の下面がハーネス１０４の上側に当接して押える高さに形成されているのに対して、仕切り部材１２１は取り付けた状態でも下面がハーネス１０４に当接せず、ハーネス１０４を押えない高さに形成されていることである。 The difference between the partition and pressing member 130 and the partition member 121 of the second embodiment is that the partition and pressing member 130 is attached to the notch 103 and the lower surface of the partition and pressing member 130 is on the upper side of the harness 104. Whereas the partition member 121 is formed to a height that abuts and presses, the lower surface does not contact the harness 104 even when attached, and the partition member 121 is formed to a height that does not press the harness 104.

また、この仕切り兼押さえ部材１３０とは別に、フレア光を遮光する遮光手段である遮光部材１３２をポリゴン部屋１０１の奥側面１０１ａから立設して形成している。 In addition to the partition / holding member 130, a light shielding member 132, which is a light shielding means for shielding flare light, is formed upright from the back side surface 101a of the polygon chamber 101.

このように構成したので、仕切り兼押さえ部材１３０と遮光部材１３２の２つの部材で、遮光、仕切り及び押さえを行うことができて、遮光、仕切り及び押さえをそれぞれ別の部材で行う、つまり３つの部材を用いる場合よりも部品点数（又は部材点数）が削減されて、組み付け作業性が向上し、またコストの低減を図ることができる。 Since it comprised in this way, light shielding, a partition, and a press can be performed with two members, the partition and pressing member 130 and the light shielding member 132, and a light shielding, a partition, and a press are each performed by another member, that is, three The number of parts (or the number of members) is reduced as compared with the case of using members, so that the assembly workability can be improved and the cost can be reduced.

次に、本発明に係る光書き込み装置４の第４実施形態について図１１及び図１２を参照して説明する。なお、図１１は光書き込み装置のポリゴン近傍の斜視説明図、図１２は同じくポリゴン近傍の平面説明図である。
この実施形態では、仕切り兼遮光兼押さえ部材１４０を、ポリゴン部屋１０１の切り欠き部１０３の両側でハウジング４０に取り付け部材１０７で取り付けている。この仕切り兼遮光兼押さえ部材１４０は、切り欠き部１０３に嵌め込まれてポリゴン部屋１０１と基板収納部屋１０５との間を仕切る壁（切り欠き部１０３を閉じる壁）となるとともに、ハーネス１０４を押える前記第３実施形態の仕切り兼押さえ部材１３０と同様な形状の仕切り兼押え部１４１、及びフレア光を遮光する遮光手段である遮光部１４２を一体に形成した、仕切り手段と遮光手段及び押さえ手段を兼ねた部材である。 Next, a fourth embodiment of the optical writing device 4 according to the present invention will be described with reference to FIGS. 11 is an explanatory perspective view of the vicinity of the polygon of the optical writing device, and FIG. 12 is an explanatory plan view of the vicinity of the polygon.
In this embodiment, the partition / light-shielding / holding member 140 is attached to the housing 40 by the attachment member 107 on both sides of the notch 103 of the polygon chamber 101. The partition / light-shielding / holding member 140 is fitted into the notch 103 to form a wall (a wall that closes the notch 103) that partitions the polygon chamber 101 and the substrate storage chamber 105, and also holds the harness 104. The partition / holding part 141 having the same shape as the partition / holding member 130 of the third embodiment and the light shielding part 142 which is a light shielding means for shielding flare light are integrally formed, and serves as the partitioning means, the light shielding means, and the pressing means. It is a member.

このように構成したので、仕切り兼遮光兼押さえ部材１４０という１つの部材で、遮光、仕切り及び押さえを行うことができて、遮光、仕切り及び押さえをそれぞれ別の部材で行う、つまり３つの部材を用いる場合よりも、また上記各実施形態のように２つの部材を用いる場合よりも、部品点数（又は部材点数）が削減されて、組み付け作業性が向上し、またコストの低減を図ることができる。 Since it comprised in this way, it can light-shield, partition, and hold | suppress with one member called the partition / light-shielding / holding member 140, and light-shielding, partitioning, and pressing are performed on separate members, that is, three members The number of parts (or the number of members) can be reduced, and the assembly workability can be improved and the cost can be reduced as compared with the case of using two members as in the above embodiments. .

次に、本発明に係る光書き込み装置４の第５実施形態について図１３を参照して説明する。なお、図１３は光書き込み装置のポリゴン近傍の平面説明図である。
この実施形態は、上記第４実施形態と同様に、仕切り兼遮光兼押さえ部材１４０という１つの部材を用いるものであるが、ハーネス１０４を上記各実施形態のように屈曲させないでドライバボード１０６とモータボード１０３との間でストレートに配置した例である。このような構成であっても、仕切り兼遮光兼押さえ部材１４０という１つの部材を適用することができる。 Next, a fifth embodiment of the optical writing device 4 according to the present invention will be described with reference to FIG. FIG. 13 is an explanatory plan view of the vicinity of the polygon of the optical writing device.
As in the fourth embodiment, this embodiment uses a single member, which is a partition / light shielding / holding member 140, but the driver board 106 and the motor are not bent without the harness 104 being bent as in the above embodiments. This is an example in which the board 103 is arranged straight. Even with such a configuration, a single member such as a partition / light-shielding / holding member 140 can be applied.

本発明に係る光書き込み装置を備えた画像形成装置の一例を示す全体概略構成図である。1 is an overall schematic configuration diagram illustrating an example of an image forming apparatus including an optical writing device according to the present invention. 同光書き込み装置の内部構成を説明する平面説明図である。It is a plane explanatory view explaining the internal configuration of the optical writing apparatus. 同光書き込み装置の側面説明図である。It is side surface explanatory drawing of the same optical writing device. 同光書き込み装置の第1実施形態を示すポリゴン近傍の斜視説明図である。FIG. 2 is a perspective explanatory view in the vicinity of a polygon showing the first embodiment of the optical writing device. 同じくポリゴン近傍の平面説明図である。It is a plane explanatory view similarly in the vicinity of the polygon. 同じく要部断面説明図である。Similarly it is principal part cross-sectional explanatory drawing. 同光書き込み装置の第２実施形態を示すポリゴン近傍の斜視説明図である。It is perspective explanatory drawing of the polygon vicinity which shows 2nd Embodiment of the optical writing device. 同じくポリゴン近傍の平面説明図である。It is a plane explanatory view similarly in the vicinity of the polygon. 同光書き込み装置の第３実施形態を示すポリゴン近傍の斜視説明図である。It is a perspective explanatory view near the polygon showing a third embodiment of the optical writing device. 同じくポリゴン近傍の平面説明図である。It is a plane explanatory view similarly in the vicinity of the polygon. 同光書き込み装置の第４実施形態を示すポリゴン近傍の斜視説明図である。It is perspective explanatory drawing of the polygon vicinity which shows 4th Embodiment of the optical writing device. 同じくポリゴン近傍の平面説明図である。It is a plane explanatory view similarly in the vicinity of the polygon. 同光書き込み装置の第５実施形態を示すポリゴン近傍の平面説明図である。It is plane explanatory drawing of the polygon vicinity which shows 5th Embodiment of the optical writing device. 比較例に係る光書き込み装置を示すポリゴン近傍の斜視説明図である。It is perspective explanatory drawing of the polygon vicinity which shows the optical writing apparatus which concerns on a comparative example. 同じくポリゴン近傍の平面説明図である。It is a plane explanatory view similarly in the vicinity of the polygon. 同じく要部断面説明図である。Similarly it is principal part cross-sectional explanatory drawing.

符号の説明Explanation of symbols

２…感光体ドラム
４…光書き込み装置
４０…ハウジング
４１…レーザーユニット
４２…ポリゴンミラー
４３…ポリゴンモータ
４５…同期検知部
１０１…ポリゴン部屋
１０２…モータボード
１０３…切り欠き部
１０４…ハーネス
１０５…基板収容部屋
１０６…ドライバボード
１１０…遮光兼仕切り部材
１２０…遮光兼押さえ部材
１３０…仕切り兼押さえ部材
１４０…仕切り兼遮光兼押さえ部材 DESCRIPTION OF SYMBOLS 2 ... Photosensitive drum 4 ... Optical writing device 40 ... Housing 41 ... Laser unit 42 ... Polygon mirror 43 ... Polygon motor 45 ... Synchronization detection part 101 ... Polygon room 102 ... Motor board 103 ... Notch part 104 ... Harness 105 ... Board accommodation Room 106 ... Driver board 110 ... Light shielding / partitioning member 120 ... Light shielding / holding member 130 ... Partition / holding member 140 ... Partition / light shielding / holding member

Claims

複数の光ビームを振り分ける光偏向手段を収容する収容部の壁面の一部に切り欠き部を形成し、この切り欠き部を介して、前記光偏向手段を駆動回路基板に電気的に接続する接続手段を配した光書き込み装置において、前記収容部の切り欠き部を閉じるための仕切り手段及びフレア光を防止するための遮光手段を兼ねた部材を設けたことを特徴とする光書き込み装置。 A connection for electrically connecting the light deflecting means to the drive circuit board through the notched part by forming a notch in a part of the wall surface of the accommodating part for accommodating the light deflecting means for distributing the plurality of light beams. In the optical writing apparatus provided with means, an optical writing apparatus characterized in that a member serving also as a partitioning means for closing the notch portion of the housing part and a light shielding means for preventing flare light is provided.

複数の光ビームを振り分ける光偏向手段を収容する収容部の壁面の一部に切り欠き部を形成し、この切り欠き部を介して、前記光偏向手段を駆動回路基板に電気的に接続する接続手段を配した光書き込み装置において、前記接続手段を押える押さえ手段及びフレア光を防止するための遮光手段を兼ねた部材を設けたことを特徴とする光書き込み装置。 A connection for electrically connecting the light deflecting means to the drive circuit board through the notched part by forming a notch in a part of the wall surface of the accommodating part for accommodating the light deflecting means for distributing the plurality of light beams. An optical writing apparatus provided with means, wherein a member serving as a pressing means for pressing the connecting means and a light shielding means for preventing flare light is provided.

複数の光ビームを振り分ける光偏向手段を収容する収容部の壁面の一部に切り欠き部を形成し、この切り欠き部を介して、前記光偏向手段を駆動回路基板に電気的に接続する接続手段を配した光書き込み装置において、前記収容部の切り欠き部を閉じるための仕切り手段及び前記接続手段を押える押さえ手段を兼ねた部材を設けたことを特徴とする光書き込み装置。 A connection for electrically connecting the light deflecting means to the drive circuit board through the notched part by forming a notch in a part of the wall surface of the accommodating part for accommodating the light deflecting means for distributing the plurality of light beams. In the optical writing apparatus provided with the means, a member serving as a partition means for closing the notch portion of the accommodating portion and a pressing means for pressing the connection means is provided.

複数の光ビームを振り分ける光偏向手段を収容する収容部の壁面の一部に切り欠き部を形成し、この切り欠き部を介して、前記光偏向手段を駆動回路基板に電気的に接続する接続手段を配した光書き込み装置において、前記収容部の切り欠き部を閉じるための仕切り手段、フレア光を防止するための遮光手段及び前記接続手段を押える押さえ手段を兼ねた部材を設けたことを特徴とする光書き込み装置。 A connection for electrically connecting the light deflecting means to the drive circuit board through the notched part by forming a notch in a part of the wall surface of the accommodating part for accommodating the light deflecting means for distributing the plurality of light beams. In the optical writing device provided with the means, a member serving as a partitioning means for closing the notch portion of the accommodating portion, a light shielding means for preventing flare light, and a pressing means for pressing the connecting means is provided. Optical writing device.

光書き込み装置を備えが画像形成装置において、前記光書き込み装置が請求項１ないし４のいずれかに記載の光書き込み装置であることを特徴とする画像形成装置。 An image forming apparatus comprising an optical writing device, wherein the optical writing device is the optical writing device according to claim 1.