JPH10123444A - Deflection scanner - Google Patents
Deflection scannerInfo
- Publication number
- JPH10123444A JPH10123444A JP29778196A JP29778196A JPH10123444A JP H10123444 A JPH10123444 A JP H10123444A JP 29778196 A JP29778196 A JP 29778196A JP 29778196 A JP29778196 A JP 29778196A JP H10123444 A JPH10123444 A JP H10123444A
- Authority
- JP
- Japan
- Prior art keywords
- optical box
- lid member
- scanning device
- sheet metal
- dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Dot-Matrix Printers And Others (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、レーザープリンタ
やレーザーファクシミリ等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 a laser printer, a laser facsimile or the like.
【０００２】[0002]
【従来の技術】従来のこの種の偏向走査装置は例えば図
６の平面図に示すように構成されている。合成樹脂製の
光学箱１には、レーザー光を出射する半導体レーザー出
力装置２、レーザー光を線状に集光するためのシリンド
リカルレンズ３、出射されたレーザー光を偏向走査する
ためのポリゴンミラー４、このポリゴンミラー４を高速
で回転させるための駆動モータ５、偏向されたレーザー
光を結像させるための走査レンズ６、レーザー光を結像
させる感光体ドラム７、同期レンズ８、同期センサ９が
設けられている。2. Description of the Related Art A conventional deflection scanning apparatus of this type is constructed as shown in a plan view of FIG. An optical box 1 made of synthetic resin has a semiconductor laser output device 2 for emitting laser light, a cylindrical lens 3 for condensing the laser light linearly, and a polygon mirror 4 for deflecting and scanning the emitted laser light. A drive motor 5 for rotating the polygon mirror 4 at high speed, a scanning lens 6 for forming an image of the deflected laser light, a photosensitive drum 7 for forming an image of the laser light, a synchronous lens 8 and a synchronous sensor 9 are provided. Is provided.
【０００３】半導体レーザー出力装置２や同期センサ
９、及び駆動モータ５は電気基板１０に一括して接続さ
れていて、電気束線１１によって装置外部の本体メイン
基板に接続されている。また、光学箱１には蓋部材１２
を固定するための複数のねじ部１ａと、図７に示すよう
に電気束線１１を通すための切欠き部１ｂが設けられて
いる。The semiconductor laser output device 2, the synchronous sensor 9, and the drive motor 5 are collectively connected to an electric board 10, and are connected to a main board outside the apparatus by an electric bundle 11. The optical box 1 includes a cover member 12.
And a notch 1b for passing the electric bundle 11 as shown in FIG.
【０００４】図８は図６のＡ−Ａ線に沿って切断した断
面図であり、板金材料から成る蓋部材１２により、光学
箱１の内部を密閉している。図９は蓋部材１２の平面図
を示し、光学箱１に設けた複数のねじ部１ａの上方位置
に対応するビス貫通孔１２ａが設けられている。FIG. 8 is a sectional view taken along the line AA of FIG. 6, and the inside of the optical box 1 is sealed by a cover member 12 made of a sheet metal material. FIG. 9 is a plan view of the lid member 12, in which screw through holes 12a corresponding to positions above a plurality of screw portions 1a provided in the optical box 1 are provided.
【０００５】上述の構成において、光学箱１に設けた半
導体レーザー出力装置２から出射さらたレーザー光は、
シリンドリカルレンズ３によってポリゴンミラー４の面
上に線上に集光され、ポリゴンレンズ４は駆動モータ５
によって高速で回転されているので、レーザー光は偏向
され走査レンズ６を介して感光体ドラム７上に結像され
る。In the above configuration, the laser light emitted from the semiconductor laser output device 2 provided in the optical box 1 is
The light is condensed on a line on the surface of the polygon mirror 4 by the cylindrical lens 3.
, The laser beam is deflected and imaged on the photosensitive drum 7 via the scanning lens 6.
【０００６】ポリゴンミラー４によって偏向されたレー
ザー光の一部は、同期レンズ８を介して同期センサ９に
入力されて、書き込み開始信号となる。A part of the laser light deflected by the polygon mirror 4 is input to a synchronous sensor 9 via a synchronous lens 8 and becomes a write start signal.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら上述した
従来例では、光学箱１と蓋部材１２の僅かな隙間から外
部空気に含まれた粉塵が侵入し、特にポリゴンミラー４
が高速で回転した場合には、ポリゴンミラー４の周囲空
間に負圧が生じて粉塵の侵入が停止時の場合よりも激増
するという問題がある。However, in the above-mentioned conventional example, dust contained in the external air enters through a slight gap between the optical box 1 and the lid member 12, and particularly the polygon mirror 4
Is rotated at a high speed, a negative pressure is generated in the space around the polygon mirror 4, and there is a problem that the intrusion of dust increases sharply compared to the case where the rotation is stopped.
【０００８】また、蓋部材１２も板金材料で構成した場
合には、蓋部材１２自身の平面度も０．２〜０．３ｍｍ
程度は狂うために、０．２ｍｍ程度以下の粉塵は容易に
光学箱１の内部に侵入して、ポリゴンミラー４の表面に
付着して反射率を低下させて、画像出力を悪化させる。
従って、蓋部材の止めビスもできるだけ光学箱１と蓋部
材１２の隙間を小さくするために複数本を必要としてい
る。When the cover member 12 is also made of a sheet metal material, the flatness of the cover member 12 itself is 0.2 to 0.3 mm.
Dust of about 0.2 mm or less easily penetrates into the inside of the optical box 1 and adheres to the surface of the polygon mirror 4 to lower the reflectance, thereby deteriorating the image output.
Therefore, a plurality of stop screws for the lid member are required in order to make the gap between the optical box 1 and the lid member 12 as small as possible.
【０００９】或いは図１０に示すように光学箱１と蓋部
材１２の合わせ部に、発泡ウレタン２３を介在させて防
塵対策する方法もあるが、発泡ウレタン２３を光学箱１
に装着するには、煩わしい作業を必要となる。Alternatively, as shown in FIG. 10, there is a method for preventing dust by interposing a urethane foam 23 in a joint portion between the optical box 1 and the cover member 12.
In order to mount it on a computer, a troublesome operation is required.
【００１０】本発明の目的は、上述したの問題点を解消
し、光学箱と蓋部材の隙間を完全に閉塞して粉塵の侵入
を防止し、また止めビスの本数も減少できる偏向走査装
置を提供することにある。An object of the present invention is to solve the above-mentioned problems, to completely close the gap between the optical box and the cover member to prevent dust from entering, and to reduce the number of stop screws. To provide.
【００１１】[0011]
【課題を解決するための手段】上記目的を達成するため
の本発明に係る偏向走査装置は、半導体レーザーユニッ
トから出射されたレーザー光をモータ駆動部に装着され
たポリゴンミラーにより偏向し、走査レンズで結像して
感光体ドラムに走査する偏向走査装置において、前記ポ
リゴンミラーを内部に設けた光学箱を密閉する蓋部材の
外周部に、弾性力を有し装着溝を設けた弾性部材を取り
付け、前記光学箱の上端部を前記弾性部材の装着溝に圧
入したことを特徴とする。A deflection scanning device according to the present invention for achieving the above object deflects a laser beam emitted from a semiconductor laser unit by a polygon mirror mounted on a motor drive unit, and scans the laser beam. In the deflection scanning device that forms an image and scans the photosensitive drum, an elastic member having an elastic force and having a mounting groove is attached to an outer peripheral portion of a lid member that seals an optical box provided with the polygon mirror inside. The upper end of the optical box is press-fitted into a mounting groove of the elastic member.
【００１２】[0012]
【発明の実施の形態】本発明を図１〜図５に図示の実施
例に基づいて詳細に説明する。図１は第１の実施例の断
面図、図２は蓋部材の平面図を示し、全体の構成は従来
例と同一なので省略する。合成樹脂材料の光学箱３１の
底面には、ポリゴンミラー３２を取り付けた駆動モータ
３３が設けられている。光学箱３１の周壁３１ａの上端
には金属製の蓋部材３４が被着されている。蓋部材３４
の周縁にはゴム部材３５が焼き付けにより一体化されて
おり、ゴム部材３５に設けられた装着溝３５ａに光学箱
３１の周壁３１ａの上部端縁が嵌合されている。なお、
蓋部材３４にはビス止め用の嵌通孔３５ｂが設けられて
おり、使用者が誤って蓋部材３４を外さないようにする
ための警告用のビス止めに用いられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a sectional view of the first embodiment, and FIG. 2 is a plan view of a lid member. A drive motor 33 provided with a polygon mirror 32 is provided on the bottom surface of the optical box 31 made of a synthetic resin material. A metal lid member 34 is attached to the upper end of the peripheral wall 31 a of the optical box 31. Lid member 34
A rubber member 35 is integrated with the peripheral edge of the optical box 31 by baking, and an upper edge of the peripheral wall 31a of the optical box 31 is fitted into a mounting groove 35a provided in the rubber member 35. In addition,
The cover member 34 is provided with a screw-through hole 35b for screwing, which is used to screw a warning screw to prevent a user from accidentally removing the cover member 34.
【００１３】このため、光学箱３１と蓋部材３４の隙間
は、ゴム部材３５により完全に除去でき、粉塵の侵入を
防止でき、更に蓋部材３４の止めビスも不要となる。ま
た、ゴム部材３５により光学箱３１に加わる振動が蓋部
材３４に伝達され難いという利点もある。Therefore, the gap between the optical box 31 and the cover member 34 can be completely removed by the rubber member 35, so that the intrusion of dust can be prevented, and the stop screw of the cover member 34 is not required. In addition, there is an advantage that the vibration applied to the optical box 31 by the rubber member 35 is not easily transmitted to the lid member 34.
【００１４】図３は第２の実施例を示し、電気束線２１
を光学箱３１の内部から外側に引き出すために、スリッ
ト開口孔３５ｃがゴム部材３５に設けられており、電気
束線２１の形状に合わせてその周縁をゴム部材３５によ
り締め付けるようになっている。FIG. 3 shows a second embodiment, in which electric bundle 21
A slit opening 35c is provided in the rubber member 35 in order to draw out from the inside of the optical box 31 to the outside, and the peripheral edge thereof is tightened by the rubber member 35 according to the shape of the electric bundle 21.
【００１５】この結果、第１の実施例と同様に光学箱３
１と蓋部材３４の隙間は完全に閉塞され、更に電気束線
２１の引き出し口からの粉塵の侵入も防止できる。As a result, similarly to the first embodiment, the optical box 3
The gap between the cover 1 and the cover member 34 is completely closed, and furthermore, the intrusion of dust from the outlet of the electric bundle 21 can be prevented.
【００１６】図４は第３の実施例を示し、蓋部材３４と
走査レンズ３６との間に発泡ウレタン３７が設けられて
おり、光学箱３１内を仕切るようにされている。FIG. 4 shows a third embodiment, in which a urethane foam 37 is provided between the lid member 34 and the scanning lens 36 so as to partition the inside of the optical box 31.
【００１７】このように、ポリゴンミラー３２の周囲を
発泡ウレタン３７で囲むことにより、光学箱３１のレー
ザー光りが通過する開口部から侵入した粉塵が、走査レ
ンズ３６の真上を通ってポリゴンミラー３２に向かうこ
とを防止できる。As described above, by surrounding the polygon mirror 32 with the urethane foam 37, dust entering from the opening of the optical box 31 through which the laser beam passes passes right above the scanning lens 36 and passes through the polygon mirror 32. Can be prevented.
【００１８】ここで、発泡ウレタン３７をゴム部材３５
等の弾性部材と同材質にして、蓋部材３４にアウトサー
ト成型により構成することも可能である。これにより、
組立工程上大きく工数短縮が実現できる。Here, the urethane foam 37 is transferred to the rubber member 35.
It is also possible to form the lid member 34 by outsert molding using the same material as the elastic member such as. This allows
The man-hour can be greatly reduced in the assembling process.
【００１９】図５は第４の実施例を示し、光学箱３１の
一部を防塵ガラス板３８とし、蓋部材３４のゴム部材３
５に設けた装着溝３５ａに防塵ガラス板３８の端縁が挟
み込まれている。FIG. 5 shows a fourth embodiment, in which a part of an optical box 31 is made of a dust-proof glass plate 38 and a rubber member 3 of a lid member 34 is formed.
The edge of the dust-proof glass plate 38 is sandwiched in the mounting groove 35 a provided in the fifth member 5.
【００２０】このため、光学箱３１の内部の防塵対策
は、前述の第１〜第３の実施例の場合よりも完全なもの
となり、しかも防塵ガラス板３８を保持する特別な部分
が不要となる。Therefore, the dust-proofing inside the optical box 31 is more complete than that of the first to third embodiments, and a special portion for holding the dust-proof glass plate 38 is not required. .
【００２１】また、従来例で示したように、光学箱に対
する蓋部材の固定は、複数個のビスによるビス止め固定
ではないために、従来では蓋部材の平面度を０．１〜
０．２ｍｍ以下と厳しく規制して、合成樹脂材料の光学
箱に取り付ける際には、蓋部材の変形が光学箱に影響し
ないように注意していたが、これらの実施例では蓋部材
３４の光学箱３１に対する固定を弾性部材の装着溝の挟
み込みによる弾性圧により保持し、１個所だけはユーザ
が誤まって蓋を外さないようにするための警告用のビス
とされ、上述の問題は完全に解消できる。Further, as shown in the conventional example, the fixing of the lid member to the optical box is not a screw fixing with a plurality of screws, so that the flatness of the lid member is conventionally 0.1 to 0.1.
Strictly restricting to 0.2 mm or less, when attaching to the optical box made of synthetic resin material, care was taken so that the deformation of the lid member did not affect the optical box. The fixation to the box 31 is maintained by the elastic pressure caused by the insertion of the mounting groove of the elastic member, and only one portion is used as a warning screw to prevent the user from accidentally removing the lid, and the above-described problem is completely solved. Can be resolved.
【００２２】[0022]
【発明の効果】以上説明したように本発明に係る偏向走
査装置は、弾性部材を用い光学箱と蓋部材の隙間を完全
に除去できるため、粉塵の侵入を防止でき、ポリゴンミ
ラーへの粉塵の付着量が大幅に減少され、ポリゴンミラ
ーの光学性能の劣化を防止でき、また光学箱が高速の回
転で振動してもその振動は蓋部材に伝播することもな
く、良質な印字性能を得ることができる。As described above, the deflection scanning device according to the present invention can completely eliminate the gap between the optical box and the lid member by using the elastic member, so that the intrusion of dust can be prevented, and the dust is prevented from entering the polygon mirror. The adhesion amount is significantly reduced, preventing the deterioration of the optical performance of the polygon mirror. Also, even if the optical box vibrates at a high speed rotation, the vibration does not propagate to the lid member, and high quality printing performance is obtained. Can be.
【図１】第１の実施例の断面図である。FIG. 1 is a sectional view of a first embodiment.
【図２】蓋部材の平面図である。FIG. 2 is a plan view of a lid member.
【図３】第２の実施例の蓋部材の平面図である。FIG. 3 is a plan view of a lid member according to a second embodiment.
【図４】第３の実施例の断面図である。FIG. 4 is a sectional view of a third embodiment.
【図５】第４の実施例の断面図である。FIG. 5 is a sectional view of a fourth embodiment.
【図６】従来例の偏向走査装置の平面図である。FIG. 6 is a plan view of a conventional deflection scanning device.
【図７】従来例の光学箱の側面図である。FIG. 7 is a side view of a conventional optical box.
【図８】従来例の図６のＡ−Ａ線に沿った断面図であ
る。8 is a cross-sectional view of the conventional example taken along line AA of FIG.
【図９】従来例の蓋部材の平面図である。FIG. 9 is a plan view of a conventional lid member.
【図１０】従来例の蓋部材の断面図である。FIG. 10 is a cross-sectional view of a conventional lid member.
３１ 光学箱 ３４ 蓋部材 ３５ ゴム部材 ３５ａ 装着溝 ３６ 走査レンズ ３７ 発泡ウレタン ３８ 防塵ガラス板 31 optical box 34 lid member 35 rubber member 35a mounting groove 36 scanning lens 37 urethane foam 38 dustproof glass plate
Claims (3)
レーザー光をモータ駆動部に装着されたポリゴンミラー
により偏向し、走査レンズで結像して感光体ドラムに走
査する偏向走査装置において、前記ポリゴンミラーを内
部に設けた光学箱を密閉する蓋部材の外周部に、弾性力
を有し装着溝を設けた弾性部材を取り付け、前記光学箱
の上端部を前記弾性部材の装着溝に圧入したことを特徴
とする偏向走査装置。1. A deflection scanning device for deflecting a laser beam emitted from a semiconductor laser unit by a polygon mirror mounted on a motor drive unit, forming an image by a scanning lens, and scanning the photosensitive drum. An elastic member having an elastic force and provided with a mounting groove is attached to an outer peripheral portion of a lid member that seals the optical box provided therein, and an upper end portion of the optical box is press-fitted into the mounting groove of the elastic member. Deflection scanning device.
し、前記弾性部材はゴム部材とし、前記板金部材に前記
ゴム部材を焼き付けて一体的に一体的に構成した請求項
１に記載の偏向走査装置。2. The apparatus according to claim 1, wherein the lid member is formed of a metal sheet metal member, the elastic member is a rubber member, and the rubber member is baked on the sheet metal member to be integrally formed integrally. Deflection scanning device.
し、前記弾性部材は樹脂材とし、前記板金部材に前記樹
脂材をアウトサート成形で構成した請求項１に記載の偏
向走査装置。3. The deflection scanning device according to claim 1, wherein the lid member is formed of a metal sheet metal member, the elastic member is a resin material, and the resin material is formed on the sheet metal member by outsert molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29778196A JPH10123444A (en) | 1996-10-21 | 1996-10-21 | Deflection scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29778196A JPH10123444A (en) | 1996-10-21 | 1996-10-21 | Deflection scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10123444A true JPH10123444A (en) | 1998-05-15 |
Family
ID=17851104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29778196A Pending JPH10123444A (en) | 1996-10-21 | 1996-10-21 | Deflection scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10123444A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008261963A (en) * | 2007-04-11 | 2008-10-30 | Hoya Corp | Housing for laser scanner |
| JP2009237552A (en) * | 2008-03-06 | 2009-10-15 | Canon Inc | Scanning optical device |
| JP2013130635A (en) * | 2011-12-20 | 2013-07-04 | Canon Inc | Optical scanner |
| CN109975977A (en) * | 2017-12-25 | 2019-07-05 | 夏普株式会社 | Light scanning apparatus and image forming apparatus |
-
1996
- 1996-10-21 JP JP29778196A patent/JPH10123444A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008261963A (en) * | 2007-04-11 | 2008-10-30 | Hoya Corp | Housing for laser scanner |
| JP2009237552A (en) * | 2008-03-06 | 2009-10-15 | Canon Inc | Scanning optical device |
| JP2013130635A (en) * | 2011-12-20 | 2013-07-04 | Canon Inc | Optical scanner |
| US9207452B2 (en) | 2011-12-20 | 2015-12-08 | Canon Kabushiki Kaisha | Light scanning apparatus |
| CN109975977A (en) * | 2017-12-25 | 2019-07-05 | 夏普株式会社 | Light scanning apparatus and image forming apparatus |
| CN109975977B (en) * | 2017-12-25 | 2021-07-09 | 夏普株式会社 | Optical scanning device and image forming apparatus |
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