JPH09105881A - Optical scanning device - Google Patents
Optical scanning deviceInfo
- Publication number
- JPH09105881A JPH09105881A JP26287695A JP26287695A JPH09105881A JP H09105881 A JPH09105881 A JP H09105881A JP 26287695 A JP26287695 A JP 26287695A JP 26287695 A JP26287695 A JP 26287695A JP H09105881 A JPH09105881 A JP H09105881A
- Authority
- JP
- Japan
- Prior art keywords
- cover
- scanning device
- optical scanning
- cap
- optical
- 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.)
- Withdrawn
Links
Landscapes
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はレーザビームプリン
タや複写機などの情報記録用装置に使用される光走査装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical scanning device used in an information recording device such as a laser beam printer or a copying machine.
【０００２】[0002]
【従来の技術】図３は従来から良く知られた光走査装置
の平面図であり、図４はその断面図である。2. Description of the Related Art FIG. 3 is a plan view of a conventionally well known optical scanning device, and FIG. 4 is a sectional view thereof.
【０００３】光学基台１へ光学ハウジング２が四隅でね
じ３によって固定されている。記録情報に応じて変調さ
れたビームを射出する半導体レーザユニットからなる光
源部４から発光されたレーザビームは、レンズ５で矢印
方向に回転する駆動モータ１０に取付けられた回転多面
鏡８上に結像し、回転多面鏡８で偏向走査されてｆθレ
ンズ６、７で感光ドラム９に結像する。An optical housing 2 is fixed to an optical base 1 at four corners by screws 3. A laser beam emitted from a light source unit 4 including a semiconductor laser unit that emits a beam modulated according to recording information is combined on a rotary polygon mirror 8 attached to a drive motor 10 that rotates in a direction of an arrow by a lens 5. An image is formed, is deflected and scanned by the rotary polygon mirror 8, and is formed on the photosensitive drum 9 by the fθ lenses 6 and 7.
【０００４】検出ミラー１１は、回転多面鏡８で走査さ
れたレーザビームを水平同期信号検出位置に向け反射
し、その結像位置に入射面が位置する様に取付けられた
光ファイバーチューブ１２が備えられ、光ファイバーチ
ューブ１２により運ばれたレーザビームは光コネクタ１
３により水平同期信号に光電変換されれる。The detection mirror 11 is provided with an optical fiber tube 12 mounted so that the laser beam scanned by the rotary polygon mirror 8 is reflected toward the horizontal synchronizing signal detection position and the incident surface is located at the image forming position. The laser beam carried by the optical fiber tube 12 is the optical connector 1
Photoelectrically converted into a horizontal synchronizing signal by 3.
【０００５】また、図４に示すようにハウジング２内の
光学部品を覆うように樹脂や金属で作られたカバー１４
が光学ハウジング２に取付けられており、ハウジング２
内へのゴミの侵入を防止している。Further, as shown in FIG. 4, a cover 14 made of resin or metal so as to cover the optical components inside the housing 2.
Is attached to the optical housing 2, and the housing 2
It prevents the entry of dust into the interior.
【０００６】[0006]
【発明が解決しようとする課題】然しながら、回転多面
鏡を３０，０００ｒｐｍを超える様な高速回転駆動する
と、駆動モータのコイル部分で発生する熱，駆動モータ
の軸受部で発生する摩擦熱などによってカバー内部が昇
温するため内部の部品に悪影響を及ぼすような不具合を
生じることがある。However, when the rotary polygon mirror is driven to rotate at a high speed exceeding 30,000 rpm, it is covered by heat generated in the coil portion of the drive motor and friction heat generated in the bearing portion of the drive motor. Since the temperature of the inside rises, a problem may occur that adversely affects the internal parts.
【０００７】特に、近年、ｆθレンズ等をプラスチック
等の樹脂で作ったものもあり、光学ハウジング内の昇温
は避けねばならない課題である。In particular, in recent years, there have been those in which the fθ lens or the like is made of a resin such as plastic, and it is a problem that temperature rise in the optical housing must be avoided.
【０００８】本発明の目的は、上述の問題点を解決して
光走査装置内の昇温を押さえるような構成を提供するこ
とにある。An object of the present invention is to solve the above problems and to provide a structure for suppressing the temperature rise in the optical scanning device.
【０００９】[0009]
【課題を解決するための手段】上述した課題を解決する
ための本発明は、光源から出射される光を偏向する回転
鏡と、回転鏡によって偏向された光を被走査面に結像す
るレンズと、を有する光走査装置において、上記回転鏡
を覆う第１カバーと、この第１カバーの一部が露出する
ように第１カバーと上記レンズを覆う第２カバーと、を
有することを特徴とする。DISCLOSURE OF THE INVENTION The present invention for solving the above-mentioned problems includes a rotating mirror for deflecting light emitted from a light source, and a lens for forming an image of the light deflected by the rotating mirror on a surface to be scanned. And an optical scanning device having: a first cover for covering the rotating mirror; and a second cover for covering the first cover and the lens so that a part of the first cover is exposed. To do.
【００１０】[0010]
【発明の実施の形態】図１は本発明の光走査装置の第１
の実施の形態を示す図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the optical scanning device of the present invention.
It is a figure showing an embodiment.
【００１１】光学基台１の上に固定された光学ハウジン
グ２には、レーザビームを感光ドラム９に偏向走査する
回転多面鏡（回転鏡）８、回転多面鏡８を駆動する駆動
モータ１０、回転多面鏡で偏光されたレーザビームを感
光体（被走査面）に結像するｆθレンズ６，７などが精
度よく配設されている。さらに回転多面鏡８の周辺には
キャップ（第１カバー）２１が設けられており、キャッ
プ２１の上部には段差があってその一部が光学ハウジン
グ２の樹脂から成るカバー（第２カバー）１４から露出
し、その突出部分にはフィン形状部２１ａが設けられて
いる。つまり、第２カバーは第１カバーの一部が露出す
るように第１カバーとレンズを覆っている。また、キャ
ップ２１の段差部とカバー１４の間には弾性のあるシー
ル部材２２が挟まれており、外部からの粉塵の侵入を防
いでいる。さらに、レンズ６とカバー１４との間にも粉
塵の侵入を防ぐために、同様の弾性のあるシール部材２
３が挟まれている。In the optical housing 2 fixed on the optical base 1, a rotary polygon mirror (rotating mirror) 8 for deflecting and scanning a laser beam onto the photosensitive drum 9, a drive motor 10 for driving the rotary polygon mirror 8, and a rotation. The fθ lenses 6 and 7 for forming an image of the laser beam polarized by the polygonal mirror on the photoconductor (scanned surface) are accurately arranged. Further, a cap (first cover) 21 is provided around the rotary polygon mirror 8, and there is a step on the upper part of the cap 21 and a part of the cover (second cover) 14 is made of resin of the optical housing 2. The fin-shaped portion 21a is provided on the protruding portion. That is, the second cover covers the first cover and the lens so that a part of the first cover is exposed. An elastic sealing member 22 is sandwiched between the stepped portion of the cap 21 and the cover 14 to prevent dust from entering from the outside. Further, in order to prevent dust from entering between the lens 6 and the cover 14, the sealing member 2 having the same elasticity is also used.
3 is sandwiched.
【００１２】このように、キャップ及び弾性のあるフィ
ルターを配置することにより、外部との空気の出入りを
ほぼ完全に遮蔽することができ、外部からの粉塵の侵入
や回転多面鏡の風切り音を外部に漏らすことが防止でき
る。一方、駆動モータ１０を高速に回転した時に発生す
る熱はキャップ２１を通してキャップ上部に設けられた
フィン形状部２１ａより外部に放熱することができるた
めに、光走査装置内の昇温を抑えることができる。By thus disposing the cap and the elastic filter, it is possible to almost completely prevent air from entering and exiting from the outside, and to prevent dust from entering from the outside and wind noise of the rotating polygon mirror to the outside. It can be prevented from leaking. On the other hand, the heat generated when the drive motor 10 is rotated at a high speed can be radiated to the outside through the cap 21 through the fin-shaped portion 21a provided on the upper portion of the cap, so that the temperature rise in the optical scanning device can be suppressed. it can.
【００１３】ここで、キャップ２１の材質は樹脂製のカ
バー１４よりも熱伝導性のよいものが好ましい。特に金
属材料（例えばアルミダイキャスト）を用いることによ
り効率的な放熱が可能となる。また、本実施例ではキャ
ップ２１の露出部分にフィン形状部を設けているが必ず
しも必要ではない。しかし、フィン形状部を設けた方
が、放熱効果が高まり好ましい。また、キャップ２１の
上部だけを金属材料として、これをインサート成形して
も放熱性は良くなる。Here, the cap 21 is preferably made of a material having better thermal conductivity than the resin cover 14. Particularly, by using a metal material (for example, aluminum die cast), efficient heat dissipation becomes possible. Further, although the fin-shaped portion is provided on the exposed portion of the cap 21 in this embodiment, it is not always necessary. However, it is preferable to provide the fin-shaped portion because the heat dissipation effect is enhanced. Further, even if only the upper part of the cap 21 is made of a metal material and this is insert-molded, the heat dissipation is improved.
【００１４】図２は本発明の第２の実施の形態を示す図
である。図２において、駆動モータ１８はインナーロー
タ型のモータであって、回転体１８ａには駆動用マグネ
ット１８ｂが固定され、その外周に巻線コイルを含むス
テータコア１８ｃが配置され駆動モータ１８を形成して
いる。ここでキャップ３１はステータコア１８ｃと接触
して設けられている。FIG. 2 is a diagram showing a second embodiment of the present invention. In FIG. 2, the drive motor 18 is an inner rotor type motor, in which a drive magnet 18b is fixed to a rotating body 18a, and a stator core 18c including a winding coil is arranged on the outer periphery thereof to form the drive motor 18. There is. Here, the cap 31 is provided in contact with the stator core 18c.
【００１５】このように構成することにより、回転多面
鏡８が高速に回転駆動した時に、最も熱を発生する巻線
コイルを含むステータコアがキャップ３１と接触してい
るために、効率よくキャップ３１に熱伝達させることが
でき、光走査装置内の昇温をより一層抑えることができ
る。With this structure, when the rotary polygon mirror 8 is rotationally driven at high speed, the stator core including the winding coil that generates the most heat is in contact with the cap 31, so that the cap 31 can be efficiently attached to the cap 31. Heat can be transferred, and the temperature rise in the optical scanning device can be further suppressed.
【００１６】尚、この場合、ステータコアの金属部とキ
ャップとをなるべく広い面積で接触させることが望まし
い。In this case, it is desirable that the metal portion of the stator core and the cap are brought into contact with each other over a wide area.
【００１７】キャップ３１の材質は金属等の熱伝導率の
良いものが好ましい。また、上記第１，第２の実施の形
態において、光学ハウジング２の外には不図示のファン
を近傍に設け、光学ハウジングに対して冷却風を送るこ
とにより放熱性はより高くなり光走査装置内の昇温を抑
えることができる。The material of the cap 31 is preferably a material having a good thermal conductivity such as metal. Further, in the first and second embodiments, a fan (not shown) is provided in the vicinity of the optical housing 2 in the vicinity thereof, and the cooling air is sent to the optical housing, so that the heat radiation performance is further improved and the optical scanning device. The temperature rise inside can be suppressed.
【００１８】また、シール部材２２はフィルター機能を
持った部材にしてもよい。Further, the seal member 22 may be a member having a filter function.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば、
レンズ等の光学部品にゴミを付着させることなく、駆動
モータから発生する熱を効率良く放熱できるので、光学
ハウジング内の昇温を防止でき、レンズ等の光学部品の
熱による変形等を防止できる。As described above, according to the present invention,
Since heat generated from the drive motor can be efficiently radiated without adhering dust to optical components such as lenses, it is possible to prevent temperature rise in the optical housing and prevent deformation of optical components such as lenses due to heat.
【図１】本発明の第１の実施の形態を示す断面図FIG. 1 is a sectional view showing a first embodiment of the present invention.
【図２】本発明の第２の実施の形態を示す断面図FIG. 2 is a sectional view showing a second embodiment of the present invention.
【図３】従来の光走査装置の平面図FIG. 3 is a plan view of a conventional optical scanning device.
【図４】従来の光走査装置の断面図FIG. 4 is a sectional view of a conventional optical scanning device.
２ 光学ハウジング ６，７ レンズ ８ 回転多面鏡 １０，１８ 駆動モータ １４，１６ カバー ２１，３１ キャップ ２１ａ，３１ａ フィン形状部 2 Optical housing 6,7 Lens 8 Rotating polygon mirror 10,18 Drive motor 14,16 Cover 21,31 Cap 21a, 31a Fin-shaped part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 蕗田 卓 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 (72)発明者 堀 浩文 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taku Butada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hirofumi Hori 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Within the corporation
Claims (5)
と、回転鏡によって偏向された光を被走査面に結像する
レンズと、を有する光走査装置において、 上記回転鏡を覆う第１カバーと、この第１カバーの一部
が露出するように第１カバーと上記レンズを覆う第２カ
バーと、を有することを特徴とする光走査装置。1. An optical scanning device comprising: a rotating mirror for deflecting light emitted from a light source; and a lens for forming an image of the light deflected by the rotating mirror on a surface to be scanned. An optical scanning device comprising: a cover; and a second cover for covering the lens and the first cover so that a part of the first cover is exposed.
伝導率のよい材料から成る請求項１の光走査装置。2. The optical scanning device according to claim 1, wherein the first cover is made of a material having a higher thermal conductivity than the second cover.
項１の光走査装置。3. The optical scanning device according to claim 1, wherein the first cover is made of a metal material.
を有する請求項１の光走査装置。4. The optical scanning device according to claim 1, wherein the exposed portion of the first cover has a fin shape.
ンナーロータ型のモータが取付けられており、このモー
タのステータコアが上記第１カバーと接触している請求
項１の光走査装置。5. The optical scanning device according to claim 1, wherein an inner rotor type motor for driving the rotary mirror is attached to the device, and a stator core of the motor is in contact with the first cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26287695A JPH09105881A (en) | 1995-10-11 | 1995-10-11 | Optical scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26287695A JPH09105881A (en) | 1995-10-11 | 1995-10-11 | Optical scanning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09105881A true JPH09105881A (en) | 1997-04-22 |
Family
ID=17381866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26287695A Withdrawn JPH09105881A (en) | 1995-10-11 | 1995-10-11 | Optical scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09105881A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000002854A (en) * | 1998-06-15 | 2000-01-07 | Canon Inc | Light deflection scanning device and image forming device equipped therewith |
| JP2005024894A (en) * | 2003-07-02 | 2005-01-27 | Fujinon Corp | Optical scanner |
| JP2006119276A (en) * | 2004-10-20 | 2006-05-11 | Toshiba Corp | Optical scanner |
| JP2008020589A (en) * | 2006-07-12 | 2008-01-31 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| US7800804B2 (en) | 2006-03-09 | 2010-09-21 | Ricoh Company, Ltd. | Optical scanner and image forming apparatus |
-
1995
- 1995-10-11 JP JP26287695A patent/JPH09105881A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000002854A (en) * | 1998-06-15 | 2000-01-07 | Canon Inc | Light deflection scanning device and image forming device equipped therewith |
| JP2005024894A (en) * | 2003-07-02 | 2005-01-27 | Fujinon Corp | Optical scanner |
| JP4521164B2 (en) * | 2003-07-02 | 2010-08-11 | シャープ株式会社 | Optical scanning device |
| JP2006119276A (en) * | 2004-10-20 | 2006-05-11 | Toshiba Corp | Optical scanner |
| US7800804B2 (en) | 2006-03-09 | 2010-09-21 | Ricoh Company, Ltd. | Optical scanner and image forming apparatus |
| JP2008020589A (en) * | 2006-07-12 | 2008-01-31 | Ricoh Co Ltd | Optical scanner 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: 20030107 |