JP3352332B2 - Deflection scanning device - Google Patents
Deflection scanning deviceInfo
- Publication number
- JP3352332B2 JP3352332B2 JP20519396A JP20519396A JP3352332B2 JP 3352332 B2 JP3352332 B2 JP 3352332B2 JP 20519396 A JP20519396 A JP 20519396A JP 20519396 A JP20519396 A JP 20519396A JP 3352332 B2 JP3352332 B2 JP 3352332B2
- Authority
- JP
- Japan
- Prior art keywords
- polygon mirror
- rotating polygon
- elastomer
- housing
- light
- 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.)
- Expired - Fee Related
Links
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はレーザプリンタやレ
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 printer and a laser facsimile.
【０００２】[0002]
【従来の技術】レーザ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は、図７に示
すように、半導体レーザ１０１から発生されたレーザ光
をコリメータレンズ１０２ａによって平行にし、アパー
チャ１０２ｂによってビーム形状を整えたうえで、シリ
ンドリカルレンズ１０２ｃによって線状の光束に集光
し、回転多面鏡１０３によってその回転軸に沿った方向
（以下、「Ｚ軸方向」という。）に垂直な所定の方向
（以下、「Ｙ軸方向」という。）に偏向走査し、結像レ
ンズ系１０４を経て回転ドラム１０５上の感光体に結像
させる。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って静電潜像を形成す
る。Deflection scanning apparatus used in the Related Art Laser printers and image forming apparatus of a laser facsimile, as shown in FIG. 7, and collimated by a collimator lens 102a to the laser light generated from the semiconductor laser 101, an aperture 102b After adjusting the beam shape, the light is condensed into a linear light beam by the cylindrical lens 102c, and is rotated by the rotary polygon mirror 103 to a predetermined direction perpendicular to the direction along the rotation axis (hereinafter, referred to as “Z-axis direction”). The beam is deflected and scanned in a direction (hereinafter, referred to as “Y-axis direction”), and forms an image on a photoconductor on a rotating drum 105 via an imaging lens system 104. The light flux formed on the photoreceptor forms an electrostatic latent image along with the main scanning in the Y-axis direction by the rotation of the rotating polygon mirror 103 and the sub-scanning in the Z-axis direction by the rotation of the rotating drum 105.
【０００３】回転多面鏡１０３の走査光Ｌ0 は、その走
査面（ＸＹ平面）のＹ軸方向の一端においてＢＤミラー
１０６によって前記走査面の下方へ分離され、集光レン
ズ１０６ａを経てＢＤセンサ１０７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書き込み変調を開始す
る。The scanning light L 0 from the rotary polygon mirror 103 is separated by a BD mirror 106 at one end of the scanning plane (XY plane) in the Y-axis direction below the scanning plane, passes through a condenser lens 106 a, and enters a BD sensor 107. is introduced into and transmitted is converted to a scan start signal in a controller (not shown) in the semiconductor laser 101. The semiconductor laser 101 starts write modulation after receiving the scanning start signal.
【０００４】結像レンズ系１０４は、球面レンズ１０４
ａとトーリックレンズ１０４ｂからなり、回転多面鏡１
０３によって等角速度で走査される走査光Ｌ0 を、回転
ドラム１０５上においてＹ軸方向に等走度で走査する走
査光に変換するいわゆるｆθ機能を有する。The imaging lens system 104 includes a spherical lens 104
a and the toric lens 104b, and the rotating polygon mirror 1
03 has a so-called fθ function of converting the scanning light L 0 scanned at a constant angular velocity into the scanning light that scans on the rotating drum 105 in the Y-axis direction at the same running speed.
【０００５】半導体レーザ１０１、シリンドリカルレン
ズ１０２ｃ、回転多面鏡１０３、結像レンズ系１０４、
ＢＤミラー１０６およびＢＤセンサ１０７等は図示しな
い光学箱の側壁や底壁に取り付けられる。回転ドラム１
０５は光学箱の外側に配設されており、光学箱の側壁に
は、走査光Ｌ0 を光学箱から回転ドラム１０５に向かっ
て取り出すための窓が設けられている。また、光学箱の
上部開口はふた部材によって閉塞される。[0005] A semiconductor laser 101, a cylindrical lens 102c, a rotary polygon mirror 103, an imaging lens system 104,
The BD mirror 106, the BD sensor 107, and the like are attached to a side wall or a bottom wall of an optical box (not shown). Rotating drum 1
05 are disposed outside the optical box, the side wall of the optical box, a window for taking out toward the rotary drum 105 is provided a scanning light L 0 from the optical box. The upper opening of the optical box is closed by a lid member.
【０００６】回転多面鏡１０３のモータ１０３ａ（制御
部）や半導体レーザ１０１の回路基板は、ＢＤセンサ１
０７とともに、図示しないケーブル（電気束線）によっ
て前記コントローラに接続される。これらのケーブル
は、光学箱やふた部材に形成された穴や切欠部を通って
光学箱の内部から引き出される。[0006] The motor 103a (control unit) of the rotary polygon mirror 103 and the circuit board of the semiconductor laser 101 are the BD sensor 1
Along with 07, it is connected to the controller via a cable (electric bundle) (not shown). These cables are drawn out of the optical box through holes and cutouts formed in the optical box and the lid member.
【０００７】[0007]
【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、前述のように、光学箱やふた部材に設
けられた穴や切欠部等の開口部を通って、回転多面鏡の
制御部やＢＤセンサをコントローラに接続するためのケ
ーブルを引き出すように構成されているため、上記開口
部から光学箱の内部に外気が吸引され、外気中の塵埃が
回転多面鏡の反射面を汚染する等のトラブルを生じる。However, according to the above-mentioned prior art, as described above, the control section of the rotary polygon mirror passes through an opening such as a hole or a cutout provided in an optical box or a lid member. And the cable for connecting the BD sensor to the controller are drawn out, so that the outside air is sucked into the optical box from the opening, and the dust in the outside air contaminates the reflection surface of the rotating polygon mirror. Cause trouble.
【０００８】また、光学箱にふた部材を取り付けたと
き、ふた部材の反り等のために光学箱とふた部材の間に
空隙が生じると、ここから外気が侵入して回転多面鏡の
反射面等が汚染されたり、外部の静電気に対するシール
ドが不充分となって回転多面鏡の制御部やＢＤセンサ等
の電気性能が損なわれるおそれもある。Further, when a lid member is attached to the optical box, if a gap is formed between the optical box and the lid member due to warpage of the lid member, outside air enters from the gap and the reflection surface of the rotary polygon mirror or the like. May be contaminated, or the shield against the external static electricity may be insufficient, and the electric performance of the control unit of the rotary polygon mirror, the BD sensor, and the like may be impaired.
【０００９】このように、電気接続用のケーブル等を配
設するための開口部等から光学箱内に流入する外気は一
般的に微量ではあるが、偏向走査装置の高速化のために
回転多面鏡の回転数を増加させると回転多面鏡の回転に
よる吸引力が増大し、わずかな開口や空隙から多量の外
気が吸引され、回転多面鏡の反射面が急速に汚染され
る。その結果、回転多面鏡の反射面を清浄化したり回転
多面鏡を交換する頻度が増えてメンテナンスのコストが
著しく上昇する。また、外気中の静電気が光学箱に侵入
して回転多面鏡の回転性能等を劣化させるおそれもあ
り、このようなトラブルが、偏向走査装置の高性能化の
大きな障害となっている。As described above, although the amount of outside air flowing into the optical box through an opening for arranging a cable for electrical connection or the like is generally small, it is necessary to increase the speed of the deflecting scanner by using a rotating multi-plane. When the number of rotations of the mirror is increased, the suction force due to the rotation of the rotating polygon mirror is increased, a large amount of outside air is sucked from a small opening or a gap, and the reflecting surface of the rotating polygon mirror is rapidly contaminated. As a result, the frequency of cleaning the reflecting surface of the rotary polygon mirror or replacing the rotary polygon mirror increases, and the maintenance cost increases significantly. In addition, static electricity in the outside air may enter the optical box and degrade the rotation performance and the like of the rotary polygon mirror, and such a problem is a major obstacle to improving the performance of the deflection scanning device.
【００１０】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、回転多面鏡の駆動
部やＢＤセンサ等をコントローラに接続する電気接続手
段を配備するために設けられたふた部材の開口部等から
外気が侵入して回転多面鏡を汚染する等のトラブルを防
ぎ、高性能で高速化に適しており、しかもメンテナンス
のコストの低い偏向走査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 unsolved problems of the prior art, and is provided for disposing electric connection means for connecting a drive unit of a rotary polygon mirror, a BD sensor, and the like to a controller. To provide a deflection scanning device that is high-performance, suitable for high-speed operation, and has a low maintenance cost, preventing troubles such as contamination of the rotating polygon mirror due to outside air entering through the opening of the lid member or the like. It is the purpose.
【００１１】[0011]
【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、回転多面鏡と、前記回
転多面鏡を駆動する駆動手段と、前記回転多面鏡と前記
駆動手段とを収容する収容手段と、前記回転多面鏡によ
って偏向走査された光を感光体に結像させる結像手段
と、前記駆動手段を制御する制御手段と、前記収容手段
に設けられた開口部を通って前記駆動手段を前記制御手
段に接続する電気接続手段とを有する偏向走査装置にお
いて、前記開口部における空隙を塞ぐエラストマを有
し、前記エラストマは前記収容手段と前記電気接続手段
にまたがるように屈曲し、これらと密着することを特徴
とする。In order to achieve the above object, a deflection scanning apparatus according to the present invention comprises a rotating polygon mirror,
Driving means for driving the polygonal mirror ; the rotary polygonal mirror ;
A housing unit for housing a driving unit, and the rotating polygon mirror .
Image forming means for forming the light deflected and scanned on the photoreceptor, control means for controlling the driving means, and connecting the driving means to the control means through an opening provided in the housing means Deflection scanning device having
There are, have the elastomeric block the void definitive the opening
And the elastomer comprises the housing means and the electrical connection means.
It is characterized in that it is bent so as to straddle and adheres to them.
【００１２】また、光源と、前記光源から発生される光
を偏向走査する回転多面鏡と、前記回転多面鏡を駆動す
る駆動手段と、前記回転多面鏡と前記駆動手段とを収容
する収容手段と、前記回転多面鏡によって偏向走査され
た光を感光体に結像させる結像手段と、前記回転多面鏡
によって偏向走査された光の一部分を走査開始信号とし
て検知するＢＤセンサと、前記ＢＤセンサの出力に基づ
いて前記光源から発生される光を制御する制御手段と、
前記収容手段に設けられた開口部を通って前記ＢＤセン
サを前記制御手段に接続する電気接続手段とを有する偏
向走査装置において、前記開口部における空隙を塞ぐエ
ラストマを有し、前記エラストマは前記収容手段と前記
電気接続手段にまたがるように屈曲し、これらと密着す
ることを特徴とするものでもよい。Also, a light source and light generated from the light source
Rotating polygon mirror for deflecting and scanning, and driving the rotating polygon mirror
Driving means, a housing means for housing the rotating polygon mirror and the driving means, and deflection scanning by the rotating polygon mirror .
Image forming means for forming an image of the reflected light on a photoreceptor, and the rotating polygon mirror
And control means for controlling the BD sensor for detecting a portion of the deflection scanning light as the scanning start signal, the light generated from the light source based on an output of the BD sensor by,
Polarized with electrical connection means for connecting said BD sensor through an opening provided in the housing means to the control means
In direction scanning device, d closing the gap definitive the opening
Having an elastomer, wherein the elastomer is provided with the housing means and
Bent so as to extend over the electrical connection means may be characterized in the this in close contact with these.
【００１３】[0013]
【作用】回転多面鏡のモータ等の駆動手段をコントロー
ラ等の制御手段に接続するケーブルやコネクタ等の電気
接続手段は、光学箱やふた部材等の収容手段に設けられ
た開口部を通って引き出される。該開口部と前記コネク
タ等の間に空隙があるとそこから外気が侵入して回転多
面鏡の反射面が汚染されるおそれがあるため、前記コネ
クタ等に弾力的に密着するエラストマを前記ふた部材等
の開口部に一体成形する。An electric connection means such as a cable or a connector for connecting a drive means such as a motor of a rotary polygon mirror to a control means such as a controller is drawn out through an opening provided in a housing means such as an optical box or a lid member. It is. If there is a gap between the opening and the connector or the like, there is a possibility that outside air may enter from the gap and the reflection surface of the rotary polygon mirror may be contaminated, so that the elastomer that elastically adheres to the connector or the like is covered with the lid member. And so on.
【００１４】これによって、ふた部材等の開口部から外
気が侵入するのを防ぎ、外気による回転多面鏡の汚染を
回避する。Thus, outside air is prevented from entering through the opening of the lid member or the like, and contamination of the rotary polygon mirror by the outside air is avoided.
【００１５】回転多面鏡の走査光の一部分を走査開始信
号として検知するＢＤセンサとコントローラ等の制御手
段とを接続する電気接続手段のために光学箱やふた部材
等の収容手段に設けられた開口部についても、上記と同
様のエラストマを一体成形すれば、外気の侵入を防ぐこ
とができる。An opening provided in a housing means such as an optical box or a lid member for electric connection means for connecting a BD sensor for detecting a part of the scanning light of the rotary polygon mirror as a scanning start signal and control means such as a controller. As for the portion, if the same elastomer as described above is integrally formed, intrusion of outside air can be prevented.
【００１６】[0016]
【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.
【００１７】図１は第１実施例による偏向走査装置を示
すもので、（ａ）はその全体をふた部材９の一部分を破
断した状態で示す模式平面図、（ｂ）は主要部のみを示
す部分断面図である。光源である半導体レーザ１から発
生されたレーザ光Ｌ1 は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、回転多面鏡３によってＹ軸方
向（主走査方向）に偏向走査され、結像手段である結像
レンズ系４と折り返しミラー５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の回転による主走査と、回転ドラムの回転
による副走査に伴って静電潜像を形成する。FIGS. 1A and 1B show a deflection scanning apparatus according to a first embodiment, wherein FIG. 1A is a schematic plan view showing the entire structure of the deflection member with a part of a lid member 9 broken away, and FIG. It is a partial sectional view. A laser beam L 1 generated from a semiconductor laser 1 as a light source is condensed into a linear light beam by a cylindrical lens 2, deflected and scanned in a Y-axis direction (main scanning direction) by a rotary polygon mirror 3, and formed by an imaging unit. An image is formed on a photosensitive member on a rotating drum (not shown) via a certain imaging lens system 4 and a return mirror 5. The light flux that forms an image on the photoconductor is
An electrostatic latent image is formed by the main scanning by the rotation of the rotating polygon mirror 3 and the sub-scanning by the rotation of the rotating drum.
【００１８】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ＢＤミラー６ａによって反射され、集
光レンズ６ｂを経てＢＤセンサ６ｃに導入され、制御手
段であるコントローラ７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書き込み変調を開始する。The scanning light of the rotary polygon mirror 3 reaches one end of its scanning surface, is reflected by a BD mirror 6a, is introduced into a BD sensor 6c through a condenser lens 6b, and is scanned by a controller 7 as control means. The signal is converted into a start signal and transmitted to the semiconductor laser 1. The semiconductor laser 1 starts writing modulation after receiving the scanning start signal.
【００１９】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、結像レンズ系４、ＢＤミラー６ａ、
ＢＤセンサ６ｃ等は偏向走査装置の本体フレームと一体
である合成樹脂製の光学箱８の側壁や底壁に取り付けら
れる。回転ドラムは光学箱８の外側に配設されており、
光学箱８の底壁には走査光を光学箱８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。また、光
学箱８の上部開口は、光学箱８とともに収容手段を構成
するふた部材９によって閉塞され、ふた部材９はその周
縁部において光学箱８にビス止めされる。A semiconductor laser 1, a cylindrical lens 2, a rotating polygon mirror 3, an imaging lens system 4, a BD mirror 6a,
The BD sensor 6c and the like are attached to a side wall and a bottom wall of the optical box 8 made of synthetic resin which is integrated with the main body frame of the deflection scanning device. The rotating drum is disposed outside the optical box 8,
The bottom wall of the optical box 8 is provided with a window for taking out scanning light from the optical box 8 toward the rotating drum. The upper opening of the optical box 8 is closed by a lid member 9 that forms a housing together with the optical box 8, and the lid member 9 is screwed to the optical box 8 at a peripheral edge thereof.
【００２０】結像レンズ系４は、それぞれ結像レンズで
ある球面レンズ４ａとトーリックレンズ４ｂ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Ｌ1
を回転ドラム上においてＹ軸方向に等走度で走査する走
査光に変換するいわゆるｆθ機能を有する。The imaging lens system 4 comprises a spherical lens 4a and a toric lens 4b, which are imaging lenses, respectively.
Scanning light L 1 scanned at a constant angular velocity by the rotating polygon mirror 3
Has a so-called fθ function of converting the scanning light into scanning light that scans the rotary drum at a constant run in the Y-axis direction.
【００２１】また、偏向走査装置の本体フレームに対す
る光学箱８のＸ軸方向の位置決めと回転角度θは、その
外側の支持部に設けられたガイド穴８ａ、８ｂに係合す
る位置決めピン１０ａ、１０ｂによって行なわれ、位置
決めを完了したうえで、ビス１１、１２によって光学箱
８を本体フレームに固定する。The positioning of the optical box 8 in the X-axis direction with respect to the main body frame of the deflection scanning apparatus and the rotation angle θ are determined by positioning pins 10a and 10b which engage with guide holes 8a and 8b provided in the support portion outside the optical box. After the positioning is completed, the optical box 8 is fixed to the main body frame by the screws 11 and 12.
【００２２】回転多面鏡３の駆動手段であるモータ３ａ
の基部である回路基板３ｂは、その一端に、後述するケ
ーブル１３ａおよびそのコネクタ１３ｂとともに電気接
続手段を構成するコネクタ１３（図１の（ｂ）参照）を
有し、ケーブル１３ａによってコントローラ７に電気接
続される。同様に、ＢＤセンサ６ｃも電気接続手段であ
るコネクタ１４ｂを有し、ケーブル１４ａによってコン
トローラ７に電気接続され、半導体レーザ１の回路基板
１ａもコネクタ１５を有し、ケーブル１５ａによってコ
ントローラ７に電気接続される。A motor 3a as a driving means of the rotary polygon mirror 3
Has a connector 13 (see FIG. 1B) which constitutes an electric connection means together with a cable 13a and a connector 13b described later at one end thereof, and the controller 13 is electrically connected to the controller 7 by the cable 13a. Connected. Similarly, the BD sensor 6c also has a connector 14b as an electrical connection means, and is electrically connected to the controller 7 by a cable 14a. The circuit board 1a of the semiconductor laser 1 also has a connector 15 and is electrically connected to the controller 7 by a cable 15a. Is done.
【００２３】半導体レーザ１のコネクタ１５は光学箱８
の外側に配設されるが、回転多面鏡３のモータ３ａのコ
ネクタ１３とＢＤセンサ６ｃのコネクタ１４ｂは光学箱
８の内部に配設され、ケーブル１３ａ、１４ａに対する
接続部のみがふた部材９の上へ露出する。The connector 15 of the semiconductor laser 1 is
The connector 13 of the motor 3a of the rotary polygon mirror 3 and the connector 14b of the BD sensor 6c are provided inside the optical box 8, and only the connection portions for the cables 13a and 14a are provided by the cover member 9. Exposed upward.
【００２４】すなわち、回転多面鏡３のコネクタ１３
は、その頂部がふた部材９の開口部である穴９ａを貫通
して外部へ露出しており、これに、ケーブル１３ａのコ
ネクタ１３ｂが接続される。That is, the connector 13 of the rotary polygon mirror 3
Has its top exposed through a hole 9a, which is an opening of the lid member 9, to the outside, and the connector 13b of the cable 13a is connected to this.
【００２５】ふた部材９の穴９ａと回転多面鏡３のコネ
クタ１３の間に空隙があると、ここから外気が侵入し、
外気中の塵埃によって回転多面鏡３の反射面が汚染され
る。そこで、ふた部材９の穴９ａのまわりに、コネクタ
１３の外径より小径の穴１６ａを有するエラストマ（常
温でゴム状の弾性を有する物資）１６を設ける。エラス
トマ１６は、ふた部材９と一体成形されたもので、ふた
部材９を光学箱８に装着したときに、ふた部材９の穴９
ａから露出するコネクタ１３のまわりにエラストマ１６
が弾力的に密着して、穴９ａとコネクタ１３の間の空隙
を塞ぐように構成されている。If there is a gap between the hole 9a of the lid member 9 and the connector 13 of the rotary polygon mirror 3, outside air enters from there, and
The reflection surface of the rotary polygon mirror 3 is contaminated by dust in the outside air. Therefore, an elastomer (material having rubber-like elasticity at room temperature) 16 having a hole 16a smaller in diameter than the outer diameter of the connector 13 is provided around the hole 9a of the lid member 9. The elastomer 16 is formed integrally with the lid member 9. When the lid member 9 is mounted on the optical box 8, the hole 9 in the lid member 9 is formed.
a around the connector 13 exposed from the
Are elastically adhered to each other to close a gap between the hole 9a and the connector 13.
【００２６】エラストマ１６の穴１６ａの寸法は、コネ
クタ１３の外形寸法より長さ方向および幅方向に１〜２
ｍｍ程度小さく設定するのが望ましい。The size of the hole 16a of the elastomer 16 is 1 to 2 in the length direction and the width direction from the external size of the connector 13.
It is desirable to set the distance as small as about mm.
【００２７】このように、ふた部材９の穴９ａと回転多
面鏡１３のコネクタ１３の間が、エラストマ１６によっ
て完全に密封されるため、ふた部材９の穴９ａから光学
箱８の内部に外気が侵入することなく、外気による回転
多面鏡３の汚染を効果的に防ぐことができる。As described above, the space between the hole 9a of the lid member 9 and the connector 13 of the rotary polygon mirror 13 is completely sealed by the elastomer 16, so that outside air can enter the optical box 8 through the hole 9a of the lid member 9. The contamination of the rotary polygon mirror 3 by the outside air can be effectively prevented without intrusion.
【００２８】ＢＤセンサ６ｃのコネクタ１４ｂを露出さ
せるふた部材９の穴のまわりにも、外気の侵入を防ぐた
めに同様のエラストマが一体成形されている。A similar elastomer is integrally formed around the hole of the lid member 9 exposing the connector 14b of the BD sensor 6c in order to prevent outside air from entering.
【００２９】なお、回転多面鏡３のコネクタ１３の頂部
にエラストマ１６が密着するように構成する替わりに、
図２に示すようにケーブル２３のコネクタ２３ｂを回転
多面鏡３のコネクタ１３に接続したときに、ふた部材２
９と一体成形されたエラストマ２６がケーブル２３のコ
ネクタ２３ｂに密着するように構成してもよいし、ある
いは、図３に示すように、エラストマ３６をケーブル３
３のコネクタ３３ｂと一体的に設けておき、ケーブル３
３のコネクタ３３ｂを回転多面鏡３のコネクタ１３に接
続したときにエラストマ３６がふた部材３９の穴３９ａ
の周縁に密着するように構成してもよい。なお、エラス
トマ３６は円錐状に拡がる下半部を有し、ふた部材３９
に密着したときにエラストマ３６の下半部が弾性変形し
て両者の角度αが１〜１０°程度になるように製作され
る。これは、エラストマ３６の弾性によってケーブル３
３のコネクタ３３ｂが抜け落ちるのを防ぐためである。In place of the construction in which the elastomer 16 is in close contact with the top of the connector 13 of the rotary polygon mirror 3,
When the connector 23b of the cable 23 is connected to the connector 13 of the rotary polygon mirror 3 as shown in FIG.
The elastomer 26 integrally formed with the cable 9 may be configured to be in close contact with the connector 23b of the cable 23, or, as shown in FIG.
3 is provided integrally with the connector 33b.
When the connector 33b of the third polygon mirror 3 is connected to the connector 13 of the rotary polygon mirror 3, the elastomer 36 has a hole 39a of the lid member 39.
May be configured to be in close contact with the peripheral edge of. The elastomer 36 has a lower half that expands in a conical shape, and a lid member 39.
The lower part of the elastomer 36 is elastically deformed when it comes into close contact with the base member 36, so that the angle α between them becomes about 1 to 10 °. This is because the elasticity of the elastomer 36 makes the cable 3
This is to prevent the third connector 33b from falling off.
【００３０】図４は参考例による偏向走査装置を示す模
式断面図であって、これは、光学箱４８の開口部である
側壁上端にエラストマ４６を一体成形したもので、ふた
部材４９を光学箱４８にビス止めしたときに、エラスト
マ４６が圧縮され、ふた部材４９に弾力的に密着するこ
とで光学箱４８との間を密封するように構成されてい
る。FIG. 4 is a schematic sectional view showing a deflection scanning device according to a reference example. This is a device in which an elastomer 46 is integrally formed at an upper end of a side wall which is an opening of an optical box 48. When the screw is fixed to the optical box 48, the elastomer 46 is compressed and elastically adheres to the lid member 49 to seal the space between the optical box 48.
【００３１】回転多面鏡３、結像レンズ系４、折り返し
ミラー５等については第１実施例と同様であるので同一
符号で表わし説明は省略する。The rotary polygon mirror 3, the imaging lens system 4, the folding mirror 5, and the like are the same as those in the first embodiment, and are represented by the same reference numerals, and description thereof is omitted.
【００３２】ふた部材４９に反り等があっても、光学箱
４８との間に空隙が発生することなく、外気中の塵埃や
静電気の侵入を効果的に防ぐことができる。Even if the lid member 49 is warped or the like, no air gap is generated between the lid member 49 and the optical box 48, and the intrusion of dust and static electricity in the outside air can be effectively prevented.
【００３３】また、図５に示すように、ふた部材５９に
回転多面鏡３のまわりを包囲するカバー部材であるリブ
５９ａを一体的に設けるとともに、該リブ５９ａの先端
にエラストマ５６を一体成形してもよい。エラストマ５
６は回転多面鏡３の回路基板３ｂに弾力的に密着して、
回転多面鏡３のまわりの雰囲気を光学箱５８の残りの空
間部から遮断する。なお、リブ５９ａには、回転多面鏡
３の走査光を取り出すための窓５９ｂが設けられ、窓５
９ｂにはガラス板５９ｃがはめ込まれている。As shown in FIG. 5, a rib 59a, which is a cover member surrounding the rotary polygon mirror 3, is integrally provided on the lid member 59, and an elastomer 56 is integrally formed at the tip of the rib 59a. You may. Elastomer 5
6 is elastically adhered to the circuit board 3b of the rotary polygon mirror 3,
The atmosphere around the rotary polygon mirror 3 is cut off from the remaining space of the optical box 58. The rib 59a is provided with a window 59b for taking out the scanning light of the rotary polygon mirror 3, and the window 5b is provided.
9b is fitted with a glass plate 59c.
【００３４】このように、光学箱５８の内部で回転多面
鏡３のまわりの雰囲気を密封することで、外気による回
転多面鏡３の反射面の汚染を効果的に防止する。As described above, by sealing the atmosphere around the rotary polygon mirror 3 inside the optical box 58, contamination of the reflection surface of the rotary polygon mirror 3 by outside air can be effectively prevented.
【００３５】あるいは、図６に示すように、ふた部材６
９から結像レンズ６４に向かって突出するエラストマ６
６を設けて、光学箱６８にふた部材６９をビス止めした
ときに、エラストマ６６が弾性変形して結像レンズ６４
に密着するように構成してもよい。すなわち、回転多面
鏡３のまわりの雰囲気を結像レンズ６４とエラストマ６
６によって密封することで、外気による回転多面鏡３の
反射面の汚染を防ぐことができる。Alternatively, as shown in FIG.
Elastomer 6 protruding from tube 9 toward imaging lens 64
6, when the lid member 69 is screwed into the optical box 68, the elastomer 66 is elastically deformed and the imaging lens 64 is formed.
You may comprise so that it may contact | adhere closely. That is, the atmosphere around the rotary polygon mirror 3 is defined by the imaging lens 64 and the elastomer 6.
6 can prevent contamination of the reflecting surface of the rotary polygon mirror 3 by outside air.
【００３６】[0036]
【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.
【００３７】回転多面鏡の駆動部やＢＤセンサ等をコン
トローラに接続する電気接続手段を配備するために設け
られたふた部材の開口部等から外気が侵入して回転多面
鏡を汚染する等のトラブルを防ぐ。これによって、高性
能で高速化に適しており、しかもメンテナンスのコスト
の低い偏向走査装置を実現できる。Problems such as contamination of the rotary polygon mirror due to the intrusion of outside air from the opening of a lid member provided for providing an electric connection means for connecting the drive unit of the rotary polygon mirror and the BD sensor to the controller, etc. prevent. As a result, it is possible to realize a deflection scanning device which is high-performance and suitable for high-speed operation and has low maintenance cost.
【図１】第１実施例による偏向走査装置を示すもので、
（ａ）はその全体を示す模式平面図、（ｂ）は主要部の
みを示す部分断面図である。FIG. 1 shows a deflection scanning device according to a first embodiment,
(A) is a schematic plan view showing the whole, and (b) is a partial cross-sectional view showing only a main part.
【図２】第１実施例の第１の変形例の主要部を示す部分
断面図である。FIG. 2 is a partial cross-sectional view showing a main part of a first modification of the first embodiment.
【図３】第１実施例の第２の変形例の主要部を示す部分
模式断面図である。FIG. 3 is a partial schematic sectional view showing a main part of a second modification of the first embodiment.
【図４】参考例による偏向走査装置を示す模式断面図で
ある。FIG. 4 is a schematic sectional view showing a deflection scanning device according to a reference example.
【図５】参考例の第１の変形例の主要部を示す部分断面
図である。FIG. 5 is a partial sectional view showing a main part of a first modification of the reference example.
【図６】参考例の第２の変形例の主要部を示す部分断面
図である。FIG. 6 is a partial sectional view showing a main part of a second modification of the reference example.
【図７】一従来例を説明する模式図である。FIG. 7 is a schematic diagram illustrating a conventional example.
３ 回転多面鏡 ４ 結像レンズ系 ７ コントローラ ８，４８，５８，６８ 光学箱 ９，２９，３９，４９，５９，６９ ふた部材 １３，１４ｂ，１５，１３ｂ，２３ｂ，３３ｂ コネ
クタ １３ａ，１４ａ，１５ａ，２３ａ，３３ａ ケーブル １６，２６，３６，４６，５６，６６ エラストマ ６４ 結像レンズ3 Rotating polygon mirror 4 Imaging lens system 7 Controller 8, 48, 58, 68 Optical box 9, 29, 39, 49, 59, 69 Lid member 13, 14b , 15, 13b, 23b, 33b Connector 13a, 14a, 15a , 23a, 33a Cable 16, 26, 36, 46, 56, 66 Elastomer 64 Imaging lens
Claims (2)
る駆動手段と、前記回転多面鏡と前記駆動手段とを収容
する収容手段と、前記回転多面鏡によって偏向走査され
た光を感光体に結像させる結像手段と、前記駆動手段を
制御する制御手段と、前記収容手段に設けられた開口部
を通って前記駆動手段を前記制御手段に接続する電気接
続手段とを有する偏向走査装置において、前記開口部に
おける空隙を塞ぐエラストマを有し、前記エラストマは
前記収容手段と前記電気接続手段にまたがるように屈曲
し、これらと密着することを特徴とする偏向走査装置。 1. A rotating polygon mirror, and a driving means for driving the rotating polygon mirror.
Driving means, a housing means for housing the rotating polygon mirror and the driving means, and deflection scanning by the rotating polygon mirror .
An imaging means for focusing the light on the photosensitive member was, and control means for controlling said drive means, an electrical connection means for connecting said drive means through an opening provided in the housing means to the control means A deflection scanning device having:
Having an elastomer that closes a gap in the elastomer, wherein the elastomer is
Bent to span the housing means and the electrical connection means
And, a deflection scanning apparatus which is characterized that you close contact with these.
向走査する回転多面鏡と、前記回転多面鏡を駆動する駆
動手段と、前記回転多面鏡と前記駆動手段とを収容する
収容手段と、前記回転多面鏡によって偏向走査された光
を感光体に結像させる結像手段と、前記回転多面鏡によ
って偏向走査された光の一部分を走査開始信号として検
知するＢＤセンサと、前記ＢＤセンサの出力に基づいて
前記光源から発生される光を制御する制御手段と、前記
収容手段に設けられた開口部を通って前記ＢＤセンサを
前記制御手段に接続する電気接続手段とを有する偏向走
査装置において、前記開口部における空隙を塞ぐエラス
トマを有し、前記エラストマは前記収容手段と前記電気
接続手段にまたがるように屈曲し、これらと密着するこ
とを特徴とする偏向走査装置。2. A light source and light emitted from the light source are polarized.
A rotating polygon mirror for scanning in the opposite direction, and a drive for driving the rotating polygon mirror.
Moving means, housing means for housing the rotating polygon mirror and the driving means, and light deflected and scanned by the rotating polygon mirror .
Image forming means for forming an image on the photosensitive member, and the rotating polygon mirror.
And BD sensor for detecting a portion of the deflection scanning light I as the scanning start signal, the control means for controlling the light emitted from the light source based on the output of the BD sensor, an opening provided in the housing means through parts deflection run and an electrical connection means for connecting said BD sensor to the control means
In査device, Elastica closing the gap definitive the opening
An elastomer, wherein the elastomer is provided with the housing means and the electric
Bent so as to extend over the connecting means, the deflection scanning device comprising a this <br/> in close contact with these.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20519396A JP3352332B2 (en) | 1996-07-16 | 1996-07-16 | Deflection scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20519396A JP3352332B2 (en) | 1996-07-16 | 1996-07-16 | Deflection scanning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1031171A JPH1031171A (en) | 1998-02-03 |
| JP3352332B2 true JP3352332B2 (en) | 2002-12-03 |
Family
ID=16502952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20519396A Expired - Fee Related JP3352332B2 (en) | 1996-07-16 | 1996-07-16 | Deflection scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3352332B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5111080B2 (en) * | 2007-12-03 | 2012-12-26 | キヤノン株式会社 | Image forming apparatus |
-
1996
- 1996-07-16 JP JP20519396A patent/JP3352332B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1031171A (en) | 1998-02-03 |
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