JPH0675184A - Light deflection scanning device - Google Patents
Light deflection scanning deviceInfo
- Publication number
- JPH0675184A JPH0675184A JP25069092A JP25069092A JPH0675184A JP H0675184 A JPH0675184 A JP H0675184A JP 25069092 A JP25069092 A JP 25069092A JP 25069092 A JP25069092 A JP 25069092A JP H0675184 A JPH0675184 A JP H0675184A
- Authority
- JP
- Japan
- Prior art keywords
- scanning device
- deflection scanning
- housing
- optical deflection
- motor
- 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.)
- Granted
Links
Landscapes
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光ビーム等を用いた記
録装置において、光ビームを感光体上に偏向走査するた
めの回転多面鏡を内蔵する光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 recording apparatus using a light beam or the like, and more particularly to a light deflection scanning apparatus having a rotary polygon mirror for deflecting and scanning the light beam on a photosensitive member.
【０００２】[0002]
【従来の技術】図１６は従来例における走査光学系の断
面図、図１７は平面図を示している。即ち、光学箱本体
１には、ビス止め等の固定方法によってモータハウジン
グ２が固定されており、モータハウジング２の上部には
駆動回路基板３を介してモータ４が設けられ、モータ４
はモータ軸受部５において支持されている。回転軸６に
は固定ばね７により固定された回転多面鏡８が取り付け
られている。回転軸６の駆動によって回転多面鏡８は回
転し、レーザーユニット９から出射されたレーザービー
ムを偏向走査し、レンズ群１０を介して感光体１１に集
光する。2. Description of the Related Art FIG. 16 is a sectional view of a conventional scanning optical system, and FIG. 17 is a plan view thereof. That is, the motor housing 2 is fixed to the optical box body 1 by a fixing method such as a screw, and the motor 4 is provided above the motor housing 2 via the drive circuit board 3.
Are supported by the motor bearing portion 5. A rotary polygon mirror 8 fixed by a fixed spring 7 is attached to the rotary shaft 6. The rotary polygon mirror 8 is rotated by driving the rotary shaft 6, and the laser beam emitted from the laser unit 9 is deflected and scanned, and focused on the photoconductor 11 via the lens group 10.
【０００３】駆動回路基板３には集積回路１２が設置さ
れ、また光学箱本体１は薄い板金や合成樹脂板等で造ら
れたカバー部材１３により覆われ、光学箱本体１とカバ
ー部材１３との間には、光学箱本体１の内部を密封する
ためのガスケット１４が挟み込まれている。An integrated circuit 12 is installed on the drive circuit board 3, and the optical box body 1 is covered with a cover member 13 made of a thin metal plate, a synthetic resin plate or the like. A gasket 14 for sealing the inside of the optical box body 1 is sandwiched between them.
【０００４】また、集積回路１２で発熱する熱を放出す
るため、図１８に示すように集積回路１２に放熱フィン
１３を取り付ける場合もある。Further, in order to release the heat generated by the integrated circuit 12, a heat radiation fin 13 may be attached to the integrated circuit 12 as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、回転多
面鏡８を回転させてレーザーユニット９からのレーザー
ビームを感光体１１上に走査させる際に、回転多面鏡８
が高速で回転するにつれて回転駆動部や集積回路１２に
流れる電流が大きくなり、発熱量が増加して光学箱本体
１の内部の温度が上昇する。このとき、光学箱本体１の
内部は回転多面鏡８の風切り音や鏡面の汚れを防ぐため
に密封され、更に、光学箱本体１が熱伝導性の低い合成
樹脂等の部材で製作されているため熱が逃げ難く、光学
箱本体１の内部の光学系及び電子部品に対して悪影響を
与えたり、回転駆動部の寿命を短くするという欠点があ
る。However, when the rotary polygon mirror 8 is rotated to scan the laser beam from the laser unit 9 on the photoconductor 11, the rotary polygon mirror 8 is rotated.
The current flowing through the rotation drive unit and the integrated circuit 12 increases as the rotation speed increases, the amount of heat generation increases, and the temperature inside the optical box body 1 rises. At this time, the inside of the optical box body 1 is sealed in order to prevent wind noise and the mirror surface of the rotary polygon mirror 8, and the optical box body 1 is made of a material such as synthetic resin having low heat conductivity. It is difficult for heat to escape, which adversely affects the optical system and electronic components inside the optical box body 1 and shortens the life of the rotary drive unit.
【０００６】本発明の目的は、光学箱本体の内部で発生
する熱を、密封状態に保ちながら外部に放熱する光偏向
走査装置を提供することにある。An object of the present invention is to provide an optical deflection scanning device which radiates heat generated inside the optical box body to the outside while keeping the heat sealed.
【０００７】[0007]
【課題を解決するための手段】上述の目的を達成するた
めの第１の光偏向走査装置は、回転多面鏡を回転駆動す
ることにより光ビームを偏向走査する光偏向走査装置に
おいて、前記光偏向走査装置を構成する要素を内蔵する
筐体は、レンズ等の光学系を固定する部分とモータ等の
回転駆動部を固定する部分とで熱伝導率を異にする部材
を使用するものである。A first optical deflection scanning device for achieving the above object is an optical deflection scanning device which deflects and scans a light beam by rotationally driving a rotary polygon mirror. The housing containing the elements constituting the scanning device uses a member having different thermal conductivities between a portion for fixing an optical system such as a lens and a portion for fixing a rotation driving unit such as a motor.
【０００８】第２の光偏向走査装置は、回転多面鏡を回
転駆動することにより光ビームを偏向走査する光偏向走
査装置において、前記回転多面鏡を内蔵する筐体をカバ
ー部材により覆い、前記カバー部材は前記筐体に対し固
定する部分を合成樹脂材で形成し、前記カバー部材の一
部を金属部材で形成したものである。The second optical deflection scanning device is an optical deflection scanning device which deflects and scans a light beam by rotationally driving a rotary polygonal mirror, in which a housing containing the rotary polygonal mirror is covered with a cover member, and the cover is covered. The member has a portion fixed to the housing made of a synthetic resin material, and a part of the cover member made of a metal member.
【０００９】第３の光偏向走査装置は、回転多面鏡を回
転駆動することにより光ビームを偏向走査する光偏向走
査装置において、前記回転多面鏡を内蔵する筐体にモー
タ及び駆動回路基板を設け、該駆動回路基板は金属基板
で形成し、該駆動回路基板上の前記モータを制御する集
積回路の反対面の基板面に前記集積回路から放熱するた
めの放熱部材を直接或いは間接的に取り付け、前記放熱
部材を前記筐体の底壁を貫通して前記筐体の外部に突出
させたものである。The third optical deflection scanning apparatus is an optical deflection scanning apparatus which deflects and scans a light beam by rotationally driving a rotary polygonal mirror, and a motor and a drive circuit board are provided in a housing containing the rotary polygonal mirror. The driving circuit board is formed of a metal substrate, and a heat dissipation member for dissipating heat from the integrated circuit is directly or indirectly attached to a surface of the driving circuit board opposite to the integrated circuit which controls the motor. The heat dissipation member penetrates the bottom wall of the housing and is projected to the outside of the housing.
【００１０】第４の光偏向走査装置は、回転多面鏡を回
転駆動することにより光ビームを偏向走査する光偏向走
査装置において、前記回転多面鏡を回転駆動するモータ
を有し、前記回転多面鏡及び前記モータを内蔵する筐体
の前記モータのハウジングに放熱部材を設け、前記放熱
部材の大部分を前記筐体外部に突出させたものである。A fourth optical deflection scanning device is a light deflection scanning device which deflects and scans a light beam by rotationally driving a rotary polygonal mirror, and has a motor for rotationally driving the rotary polygonal mirror. Also, a heat dissipation member is provided in the housing of the motor in a housing containing the motor, and most of the heat dissipation member is projected to the outside of the housing.
【００１１】第５の光偏向走査装置は、回転多面鏡を回
転駆動することにより光ビームを偏向走査する光偏向走
査装置において、前記回転多面鏡及び前記回転多面鏡を
回転駆動するモータ及び前記光ビームを集光するレンズ
を内蔵する筐体を有し、前記筐体と前記筐体を固定する
板金との間に弾性熱伝導体を挟設したものである。A fifth optical deflection scanning device is an optical deflection scanning device which deflects and scans a light beam by rotationally driving a rotary polygonal mirror, wherein the rotary polygonal mirror, a motor for rotationally driving the rotary polygonal mirror, and the optical beam. It has a housing containing a lens for condensing a beam, and an elastic heat conductor is sandwiched between the housing and a metal plate for fixing the housing.
【００１２】[0012]
【作用】上述の構成を有する第１の光偏向走査装置は、
光学箱本体の駆動系を固定する部分の熱伝導率を光学系
を固定する部分よりも大きくすることにより、回転駆動
部で発生する熱を回転駆動部を固定する部分から放出す
る。The first optical deflection scanning device having the above structure is
By making the thermal conductivity of the portion of the optical box body where the drive system is fixed larger than that of the portion where the optical system is fixed, the heat generated in the rotation drive unit is released from the portion where the rotation drive unit is fixed.
【００１３】第２の光偏向走査装置は、カバー部材の一
部の熱伝導率を光学箱本体に対して固定される部分より
高くすることにより、駆動系で発生する熱を外部に放出
する。In the second optical deflection scanning device, the heat conductivity of a part of the cover member is made higher than that of the part fixed to the optical box body, so that the heat generated in the drive system is radiated to the outside.
【００１４】第３の光偏向走査装置は、駆動基板に熱伝
導率の高い部材を使用し、駆動基板の駆動用集積回路を
設けた面の反対側に放熱フィンを取り付けて光学箱本体
の外部に突出することにより、駆動用集積回路で発生す
る熱を外部へ放出する。In the third optical deflection scanning device, a member having a high thermal conductivity is used for the driving substrate, and a radiation fin is attached to the opposite side of the surface of the driving substrate on which the driving integrated circuit is provided. By projecting to, the heat generated in the driving integrated circuit is released to the outside.
【００１５】第４の光偏向走査装置は、モータハウジン
グに放熱部材を設け、放熱部材の大部分を光学箱本体の
外部に突出させることにより、モータから発生する熱を
効率的に外部へ放出する。In the fourth optical deflection scanning device, a heat radiating member is provided in the motor housing, and most of the heat radiating member is projected to the outside of the optical box body, so that the heat generated from the motor is efficiently radiated to the outside. .
【００１６】第５の光偏向走査装置は、光学箱本体を熱
伝導率の高い弾性熱伝導体を介して板金に取り付けるこ
とによって、モータから発生する熱を外部に放出する。The fifth optical deflection scanning device radiates the heat generated from the motor to the outside by attaching the optical box body to the sheet metal via the elastic heat conductor having a high heat conductivity.
【００１７】[0017]
【実施例】本発明を図１〜図１５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は平面図を示し、光学箱本体２１にビス止め等の固定
方法によってモータ、モータ駆動部、駆動回路基板等か
ら成る回転駆動部２２が固定されている。光学箱本体２
１は２つの熱伝導率が異なる部分から成り、熱伝導率の
高い金属部２３は熱伝導率の低い樹脂部２４に一体成形
されていて、回転駆動部２２は金属部２３に固定されて
いる。回転駆動部２２には回転多面鏡２５が回転自在に
取り付けられ、回転駆動部２２の駆動によって回転多面
鏡２５は回転し、レーザーユニット２６から射出された
レーザービームをレンズ群２７により集光し、感光体２
８に向けて偏向走査するようになっている。また、光学
箱本体２１は薄い板金や合成樹脂板等で作られたカバー
部材２９により覆われている。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 the optical box main body 21. A rotation drive unit 22 including a motor, a motor drive unit, a drive circuit board and the like is fixed to the optical box main body 21 by a fixing method such as screwing Has been done. Optical box body 2
1 is composed of two parts having different thermal conductivities, the metal part 23 having a high thermal conductivity is integrally molded with the resin part 24 having a low thermal conductivity, and the rotation driving part 22 is fixed to the metal part 23. . A rotary polygon mirror 25 is rotatably attached to the rotary drive unit 22, the rotary polygon mirror 25 is rotated by the drive of the rotary drive unit 22, and a laser beam emitted from a laser unit 26 is condensed by a lens group 27. Photoconductor 2
Deflection scanning toward 8 is performed. The optical box body 21 is covered with a cover member 29 made of a thin metal plate or a synthetic resin plate.
【００１８】回転駆動部２２で発生した熱は回転駆動部
２２を固定する金属部２３に容易に伝わり、光学箱本体
２１の外部に放熱されるため、モータ軸受部の昇温が抑
えられてモータ軸受部の寿命が延びる。また、光学箱本
体２１の樹脂部２４には熱は伝わり難く光学系の熱変形
等が抑えられ、安定した画像を形成することができ、光
学系の延命化することができる。The heat generated in the rotary drive unit 22 is easily transferred to the metal portion 23 for fixing the rotary drive unit 22 and radiated to the outside of the optical box body 21, so that the temperature rise of the motor bearing unit is suppressed and the motor is suppressed. The life of the bearing portion is extended. Further, heat is not easily transmitted to the resin portion 24 of the optical box body 21, thermal deformation of the optical system is suppressed, a stable image can be formed, and the life of the optical system can be extended.
【００１９】図３は第２の実施例を示し、図１、図２と
同一の符号は同一の部材を表している。光学箱本体２１
は金属部３０に樹脂部３１を一体成形して製作され、金
属部３０の上部には回転駆動部２２が固定され、金属部
３０の下面には放熱面積を拡げるための放熱フィン３２
が光学箱本体２１の外部に向けて設けられている。FIG. 3 shows a second embodiment, and the same reference numerals as those in FIGS. 1 and 2 represent the same members. Optical box body 21
Is manufactured by integrally molding a resin portion 31 on the metal portion 30, the rotation driving portion 22 is fixed on the upper portion of the metal portion 30, and a heat radiation fin 32 for expanding a heat radiation area on the lower surface of the metal portion 30.
Is provided outside the optical box body 21.
【００２０】回転駆動部２２で発生し光学箱本体２１の
金属部３０に伝達した熱は、金属部３０に設けられた放
熱フィン３２から光学箱本体２１の外部に更に効率良く
放出されることになる。The heat generated in the rotation drive unit 22 and transferred to the metal portion 30 of the optical box body 21 is more efficiently released to the outside of the optical box body 21 from the heat radiation fins 32 provided in the metal portion 30. Become.
【００２１】図４は第３の実施例を示し、光学箱本体２
１は金属部３３に樹脂部３４を一体成形して製作され、
金属部３３にシリコンラバー等の弾性熱伝導体３５を介
して回転駆動部２２がねじ止め等の固定方法で固定され
ている。即ち、弾性熱伝導体３５は回転駆動部２２及び
金属部３３の双方に密着した状態となる。FIG. 4 shows a third embodiment of the optical box body 2
1 is made by integrally molding the resin portion 34 on the metal portion 33,
The rotary drive unit 22 is fixed to the metal portion 33 via an elastic heat conductor 35 such as silicon rubber by a fixing method such as screwing. That is, the elastic heat conductor 35 is in close contact with both the rotary drive unit 22 and the metal unit 33.
【００２２】この場合も、弾性熱伝導体３５を介するこ
とにより回転駆動部２２で発生した熱は効率良く金属部
３３に伝達して、光学箱本体２１の外部に放熱される。In this case as well, the heat generated in the rotary drive section 22 is efficiently transmitted to the metal section 33 through the elastic heat conductor 35 and is radiated to the outside of the optical box body 21.
【００２３】図５は第４の実施例の断面図を示し、回転
駆動部２２の駆動回路基板４１上には集積回路４２が設
置されている。カバー部材２９が光学箱本体２１に固定
される部分はポリプロピレン等の樹脂部４３で製作さ
れ、係止手段等によって固定されている。また、カバー
部材２９の回転駆動部２２の上方を含む部分は、例えば
アルミニウム、銅、黄銅等の金属部４４とされている。FIG. 5 is a sectional view of the fourth embodiment, in which an integrated circuit 42 is installed on the drive circuit board 41 of the rotary drive unit 22. The portion where the cover member 29 is fixed to the optical box body 21 is made of a resin portion 43 such as polypropylene and is fixed by a locking means or the like. Further, the portion of the cover member 29 including the upper portion of the rotation drive portion 22 is a metal portion 44 made of, for example, aluminum, copper, brass or the like.
【００２４】このように形成することにより、回転多面
鏡２５が高速で回転駆動したときに発生する電流、つま
り図示しないステータコイルや集積回路４２に流れる電
流が増加したり、回転駆動部２２のモータ軸受部の摩擦
が増加することによる発熱を、カバー部材２９の金属部
４４から放出することが可能になる。With this structure, the current generated when the rotary polygon mirror 25 is rotationally driven at high speed, that is, the current flowing through the stator coil or the integrated circuit 42 (not shown) is increased, or the motor of the rotary drive unit 22 is increased. The heat generated due to the increased friction of the bearing portion can be released from the metal portion 44 of the cover member 29.
【００２５】特に、回転多面鏡２５を高速回転させる場
合には、光学箱本体２１を密封するため光学箱本体２１
内の温度が上昇し易くなるが、カバー部材２９から放熱
することにより光学箱本体２１の温度上昇を抑えること
ができる。これにより、光学箱本体２１内に収容されて
いる回転駆動部２２、レーザーユニット、レンズ群等の
精度が劣化したり、短寿命化を防止することができる。
また、カバー部材２９の金属部４４を板金加工で行い、
樹脂部４３を成形加工する際に一体成形とすればコスト
を下げることができる。Particularly, when the rotary polygon mirror 25 is rotated at a high speed, the optical box body 21 is sealed to seal the optical box body 21.
Although the internal temperature easily rises, the temperature rise of the optical box body 21 can be suppressed by radiating heat from the cover member 29. As a result, it is possible to prevent the accuracy of the rotation drive unit 22, the laser unit, the lens group, and the like housed in the optical box body 21 from deteriorating, and prevent the life from shortening.
In addition, the metal portion 44 of the cover member 29 is processed by sheet metal processing,
If the resin part 43 is molded integrally, the cost can be reduced.
【００２６】図６は第５の実施例を示し、光学箱本体２
１に取り付けられているカバー部材２９の金属部４４の
外側には、表面積が大きくなるような多数の鋸刃状の溝
４５が設けられている。FIG. 6 shows a fifth embodiment of the optical box body 2
On the outer side of the metal portion 44 of the cover member 29 attached to No. 1, a large number of saw blade-shaped grooves 45 having a large surface area are provided.
【００２７】このような溝４５を形成にすることによ
り、光学箱本体２１の内部の熱は更に外部に放出され易
くなり、光学箱本体２１の内部の温度上昇を更に抑える
ことができる。本実施例では、カバー部材２９の金属部
４４の外側に溝４５を設けたが、外側の形状は表面積が
増加する形状になっていれば、例えば凹凸等の他の形状
であっても同様の効果を得ることができる。By forming such a groove 45, the heat inside the optical box body 21 is more easily released to the outside, and the temperature rise inside the optical box body 21 can be further suppressed. In this embodiment, the groove 45 is provided on the outer side of the metal portion 44 of the cover member 29. However, if the outer shape is a shape having an increased surface area, the same shape may be obtained even if the shape is uneven or the like. The effect can be obtained.
【００２８】図７は第６の実施例を示し、カバー部材２
９の金属部４６には突起部４７が回転駆動部２２の集積
回路４２の表面に接触するように設けられている。FIG. 7 shows a sixth embodiment of the cover member 2
A protrusion 47 is provided on the metal portion 46 of the reference numeral 9 so as to come into contact with the surface of the integrated circuit 42 of the rotation driving portion 22.
【００２９】このような構成にすることにより、集積回
路４２による発熱を、光学箱本体２１内の空気を介さず
にカバー部材２９の金属部４６に伝熱することができる
ため、光学箱本体２１内の温度上昇を更に抑えることが
可能になり、集積回路４２の発熱をも抑制できるため、
集積回路４２の故障率を低減し、寿命を延ばすことが可
能となる。With such a configuration, the heat generated by the integrated circuit 42 can be transferred to the metal portion 46 of the cover member 29 without passing through the air inside the optical box body 21, so that the optical box body 21 can be heated. Since it is possible to further suppress the temperature rise in the inside and to suppress the heat generation of the integrated circuit 42,
The failure rate of the integrated circuit 42 can be reduced and the life can be extended.
【００３０】なお、この突起部４７には弾性を持たせ、
光学箱本体２１にカバー部材２９を取り付ける際に、突
起部４７を集積回路４２に密着させることが望ましい。
更に、この突起部４７は金属部４６と一体成形で板金加
工で行うことによりコストを下げることができる。The protrusion 47 has elasticity.
When the cover member 29 is attached to the optical box body 21, it is desirable that the protruding portion 47 be in close contact with the integrated circuit 42.
Further, the cost can be reduced by forming the protrusion 47 integrally with the metal portion 46 by performing sheet metal working.
【００３１】図８は第７の実施例を示し、駆動回路基板
４１の集積回路４２を設けた位置の反対面には図９に示
すような例えばアルミニウム等の熱伝導率の高い材料で
造られた放熱フィン５１が接着等により取り付けられ、
放熱フィン５１の先端部は光学箱本体２１の貫通孔５２
を通して光学箱本体２１の外部に突出している。更に、
駆動回路基板４１と光学箱本体２１との隙間には、発泡
性樹脂等のシール部材５３が挟み込まれている。FIG. 8 shows a seventh embodiment, in which the surface of the drive circuit board 41 opposite to the position where the integrated circuit 42 is provided is made of a material having a high thermal conductivity such as aluminum as shown in FIG. The radiation fin 51 is attached by adhesion,
The tip end of the radiation fin 51 has a through hole 52 in the optical box body 21.
It protrudes to the outside of the optical box body 21 through the. Furthermore,
A seal member 53 made of foaming resin or the like is sandwiched in the gap between the drive circuit board 41 and the optical box body 21.
【００３２】集積回路４２から発生した熱は駆動回路基
板４１を介して放熱フィン５１に伝達し、最終的に外部
に突出した放熱フィン５１の先端部から光学箱本体２１
の外部に放出される。この結果、集積回路４２で発生し
た熱は光学箱本体２１の内部にこもることがなく、光学
箱本体２１の内部の温度上昇を抑えることができる。The heat generated from the integrated circuit 42 is transferred to the radiation fin 51 via the drive circuit board 41, and finally the tip of the radiation fin 51 protruding to the outside from the optical box body 21.
Is released to the outside of. As a result, the heat generated in the integrated circuit 42 does not stay inside the optical box body 21, and the temperature rise inside the optical box body 21 can be suppressed.
【００３３】図１０は第８の実施例の断面図を示し、図
１１に示すように複数のひれ部を有する放熱フィン５４
が、光学箱本体２１に設けられた嵌合穴５５にフランジ
部５６を係止して固定されている。また、駆動回路基板
４１と放熱フィン５４との間には、図１１に示すように
熱伝導率の高い例えば真鋳等で製作された板ばね５７が
挟み込まれ、駆動回路基板４１と放熱フィン５４との距
離のばらつきに関係なく両者を常に密着させている。こ
のようにしても、第７の実施例の場合と同等の効果が得
られる。FIG. 10 shows a sectional view of the eighth embodiment, and as shown in FIG. 11, a radiation fin 54 having a plurality of fins.
However, the flange portion 56 is locked and fixed in the fitting hole 55 provided in the optical box body 21. Further, as shown in FIG. 11, a leaf spring 57 made of, for example, true casting having a high thermal conductivity is sandwiched between the drive circuit board 41 and the heat radiation fins 54, so that the drive circuit board 41 and the heat radiation fins 54. The two are always in close contact with each other regardless of the variation in the distance. Even in this case, the same effect as in the case of the seventh embodiment can be obtained.
【００３４】本実施例では、放熱フィン５４が光学箱本
体２１に対して隙間なく嵌合しているので、必ずしもシ
ール部材５３を使用する必要はない。また、放熱フィン
５４は光学箱本体２１が熱伝導率の低い部材で製作され
ている場合には成形時にインサート成形してもよい。更
に、板ばね５７には熱伝導率の高いゴム等の弾性材を使
用してもよい。また、光学箱本体２１の外部の空気が流
れるようにすれば放熱効果は更に良好となる。In this embodiment, since the radiation fins 54 are fitted into the optical box body 21 without any gap, it is not always necessary to use the seal member 53. Further, the radiation fins 54 may be insert-molded at the time of molding when the optical box body 21 is made of a member having a low thermal conductivity. Further, an elastic material such as rubber having a high thermal conductivity may be used for the leaf spring 57. Further, if the air outside the optical box body 21 is allowed to flow, the heat dissipation effect will be further improved.
【００３５】図１２は第９の実施例を示し、光学箱本体
２１には回転駆動部２２のモータハウジング６１が固定
され、モータハウジング６１の上部には駆動回路基板４
１を介してモータ６２が設けられている。モータ６２は
モータ軸受部６３において動圧流体軸受等の手段によっ
て支持され、光学箱本体２１とカバー部材２９との間に
は、光学箱本体２１の内部を密閉するためのガスケット
６４が挟み込まれている。モータハウジング６１には放
熱器６５が連結され、放熱器６５は光学箱本体２１とカ
バー部材２９との隙間から大部分が外部に突出されてい
る。FIG. 12 shows a ninth embodiment, in which the motor housing 61 of the rotary drive unit 22 is fixed to the optical box body 21, and the drive circuit board 4 is provided above the motor housing 61.
A motor 62 is provided via 1. The motor 62 is supported in the motor bearing portion 63 by means such as a hydrodynamic bearing, and a gasket 64 for sealing the inside of the optical box body 21 is sandwiched between the optical box body 21 and the cover member 29. There is. A radiator 65 is connected to the motor housing 61, and most of the radiator 65 is projected to the outside from a gap between the optical box body 21 and the cover member 29.
【００３６】このような構成にすることにより、モータ
ハウジング６１の熱は放熱器６５から効率的に外部に放
出される。なお、光学箱本体２１とカバー部材２９の接
触部分が十分な密封性を有している場合は、ガスケット
６４は必ずしも必要ではない。また、モータハウジング
６１と放熱器６５は必ずしも個別部分である必要はな
く、図１３に示すように一体成形してもよい。With such a structure, the heat of the motor housing 61 is efficiently radiated to the outside from the radiator 65. The gasket 64 is not always necessary when the contact portion between the optical box body 21 and the cover member 29 has a sufficient sealing property. Further, the motor housing 61 and the radiator 65 do not necessarily have to be separate parts, and may be integrally formed as shown in FIG.
【００３７】図１４は第１０の実施例を示し、光学箱本
体２１と板金７２の間にの外部には熱伝導率の高いシリ
コンラバー等の弾性部材７１を挟み込んで、光学箱本体
２１が板金７２に固定されている。FIG. 14 shows a tenth embodiment, in which an elastic member 71 such as silicon rubber having a high thermal conductivity is sandwiched between the optical box body 21 and the sheet metal 72, so that the optical box body 21 is made of sheet metal. It is fixed at 72.
【００３８】このような構成にすることにより、回転駆
動部２２の発熱によって昇温された光学箱本体２１の熱
は、弾性部材７１を介して効率良く板金７２に伝えられ
るため、光学箱本体２１の内部に熱がこもることを防ぐ
ことができる。また、これによりレンズ等の光学系の性
能劣化を防ぎ、モータ軸受部６３の昇温を抑えてモータ
軸受部６３の寿命を延ばすことができる。With this structure, the heat of the optical box body 21 heated by the heat generated by the rotary drive unit 22 is efficiently transmitted to the sheet metal 72 via the elastic member 71, so that the optical box body 21 is heated. The heat can be prevented from staying inside. Further, this can prevent the performance of the optical system such as the lens from being deteriorated, suppress the temperature rise of the motor bearing portion 63, and extend the life of the motor bearing portion 63.
【００３９】図１５は第１１の実施例を示し、光学箱本
体２１を固定する板金７３から板ばね部７４が切り起さ
れている。板ばね部７４は光学箱本体２１の底部に押し
付けられて密着している。FIG. 15 shows an eleventh embodiment, in which a plate spring portion 74 is cut and raised from a metal plate 73 for fixing the optical box body 21. The leaf spring portion 74 is pressed against the bottom of the optical box body 21 and is in close contact therewith.
【００４０】光学箱本体２１の内部にある回転駆動部２
２における発熱は、光学箱本体２１の底部に密着した板
ばね部７４を介して板金７３全体に伝達し、板金７３が
放熱板の機能を果たし、光学箱本体２１の内部に熱がこ
もることを防ぐことができる。更に、板金７３の一部を
板ばね部７４とすることによって、板金７３に熱を伝達
する弾性熱伝導体を兼ねることができるため、部品数が
減少してコストが低下し、かつ組立性を向上することが
できる。The rotation drive unit 2 inside the optical box body 21.
The heat generated in 2 is transmitted to the entire sheet metal 73 through the leaf spring portion 74 that is in close contact with the bottom of the optical box body 21, and the sheet metal 73 functions as a heat dissipation plate, so that heat is trapped inside the optical box body 21. Can be prevented. Further, by forming a part of the sheet metal 73 into the plate spring portion 74, the sheet metal 73 can also serve as an elastic heat conductor that transfers heat to the sheet metal 73. Therefore, the number of parts is reduced, the cost is reduced, and the assemblability is improved. Can be improved.
【００４１】本実施例では板金７３側に板ばね部７４を
設けたが、光学箱本体２１の底部に熱伝導率の高いばね
を設けてもよく、或いは別部材の熱伝導率の高い板ばね
等を光学箱本体２１と板金７３の間に挟み込んでも同様
の効果が得られる。In this embodiment, the leaf spring portion 74 is provided on the side of the sheet metal 73, but a spring having a high thermal conductivity may be provided at the bottom of the optical box body 21, or a leaf spring having a high thermal conductivity which is a separate member. The same effect can be obtained by sandwiching the same between the optical box body 21 and the metal plate 73.
【００４２】[0042]
【発明の効果】以上説明したように本発明に係る第１の
光偏向走査装置は、光学箱本体の駆動系を固定する部分
と光学系を固定する部分とで熱伝導率が異なるようにす
ることによって、駆動系で発生する熱を駆動系の固定部
材から放出するため、光学系には熱が伝達し難くなる。As described above, in the first optical deflection scanning device according to the present invention, the thermal conductivity differs between the part for fixing the drive system of the optical box body and the part for fixing the optical system. As a result, the heat generated in the drive system is radiated from the fixing member of the drive system, and it becomes difficult to transfer the heat to the optical system.
【００４３】第２の光偏向走査装置は、カバー部材の一
部を熱伝導率の高い部材で製作することによって、回転
多面鏡の回転が高まることに伴って発生する温度上昇を
防ぐことができる。In the second optical deflection scanning device, a part of the cover member is made of a member having a high thermal conductivity, so that the temperature rise caused by the increased rotation of the rotary polygon mirror can be prevented. .
【００４４】第３の光偏向走査装置は、放熱フィンの一
部を光学箱本体の外部に突出させることによって、集積
回路から発生する熱を光学箱本体の外部に放出すること
ができる。The third optical deflection scanning device can radiate the heat generated from the integrated circuit to the outside of the optical box body by projecting a part of the heat radiation fins to the outside of the optical box body.
【００４５】第４の光偏向走査装置は、モータハウジン
グに放熱器が光学箱本体の外部に突出するように取り付
けられることによって、効率的に光学箱本体の内部の熱
を放出することができる。In the fourth optical deflection scanning device, the radiator is attached to the motor housing so as to project to the outside of the optical box body, so that the heat inside the optical box body can be efficiently radiated.
【００４６】第５の光偏向走査装置は、光学箱本体を熱
伝導率の高い弾性部材を介して放熱効果を有する板金に
固定することによって、モータから発生する熱を外部に
放出することができる。In the fifth optical deflection scanning device, the heat generated from the motor can be radiated to the outside by fixing the optical box body to the sheet metal having the heat dissipation effect through the elastic member having high thermal conductivity. .
【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】第１の実施例の平面図である。FIG. 2 is a plan view of the first embodiment.
【図３】第２の実施例の断面図である。FIG. 3 is a sectional view of 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】第５の実施例の断面図である。FIG. 6 is a sectional view of a fifth embodiment.
【図７】第６の実施例の断面図である。FIG. 7 is a sectional view of a sixth embodiment.
【図８】第６の実施例の断面図である。FIG. 8 is a sectional view of a sixth embodiment.
【図９】放熱フィンの斜視図である。FIG. 9 is a perspective view of a radiation fin.
【図１０】第８の実施例の断面図である。FIG. 10 is a sectional view of an eighth embodiment.
【図１１】放熱フィンと板ばねの斜視図である。FIG. 11 is a perspective view of a radiation fin and a leaf spring.
【図１２】第９の実施例の断面図である。FIG. 12 is a sectional view of a ninth embodiment.
【図１３】第９の実施例の変形例の断面図である。FIG. 13 is a sectional view of a modification of the ninth embodiment.
【図１４】第１０の実施例の断面図である。FIG. 14 is a sectional view of a tenth embodiment.
【図１５】第１１の実施例の断面図である。FIG. 15 is a sectional view of an eleventh embodiment.
【図１６】従来例の断面図である。FIG. 16 is a sectional view of a conventional example.
【図１７】従来例の平面図である。FIG. 17 is a plan view of a conventional example.
【図１８】従来例の断面図である。FIG. 18 is a sectional view of a conventional example.
２１ 光学箱本体 ２２ 回転駆動部 ２３、３３、４４、４６ 金属部 ２４、３１、３４、４３ 樹脂部 ２５ 回転多面鏡 ２９ カバー部材 ３２、５１、５４ 放熱フィン ３５ 弾性熱伝導体 ４１ 駆動回路基板 ４２ 集積回路 ４５ 溝 ４７ 突起部 ５３ シール部材 ５７ 板ばね ６１ モータハウジング ６４ ガスケット ６５ 放熱器 ７１ 弾性部材 ７２ 板金 ７３ 板ばね部 21 Optical Box Main Body 22 Rotational Drive Section 23, 33, 44, 46 Metal Section 24, 31, 34, 43 Resin Section 25 Rotating Polyhedral Mirror 29 Cover Member 32, 51, 54 Radiating Fin 35 Elastic Heat Conductor 41 Drive Circuit Board 42 Integrated circuit 45 Groove 47 Projection 53 Seal member 57 Leaf spring 61 Motor housing 64 Gasket 65 Radiator 71 Elastic member 72 Sheet metal 73 Leaf spring part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 英幸 東京都大田区下丸子三丁目30番２号 キヤ ノン株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideyuki Miyamoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.
Claims (13)
ビームを偏向走査する光偏向走査装置において、前記光
偏向走査装置を構成する要素を内蔵する筐体は、レンズ
等の光学系を固定する部分とモータ等の回転駆動部を固
定する部分とで熱伝導率を異にする部材を使用すること
を特徴とする光偏向走査装置。1. In an optical deflection scanning device for deflecting and scanning a light beam by rotationally driving a rotary polygon mirror, a housing containing elements constituting the optical deflection scanning device fixes an optical system such as a lens. An optical deflection scanning device, characterized in that a member having a different thermal conductivity is used for a portion and a portion for fixing a rotation driving unit such as a motor.
分の熱伝導率を前記光学系を固定する部分よりも高くし
た請求項１に記載の光偏向走査装置。2. The optical deflection scanning device according to claim 1, wherein a heat conductivity of a portion of the case where the rotation driving unit is fixed is set higher than that of a portion where the optical system is fixed.
学系を固定する部分とを一体成形した請求項１に記載の
光偏向走査装置。3. The optical deflection scanning device according to claim 1, wherein a portion for fixing the rotation driving portion and a portion for fixing the optical system are integrally molded.
設けた請求項１に記載の偏向走査装置。4. The deflection scanning device according to claim 1, wherein a fold portion is provided in a portion of the housing having a high thermal conductivity.
タとの間に弾性熱伝導体を挟んだ請求項１に記載の光偏
向走査装置。5. The optical deflection scanning device according to claim 1, wherein an elastic heat conductor is sandwiched between the high thermal conductivity portion of the housing and the motor.
ビームを偏向走査する光偏向走査装置において、前記回
転多面鏡を内蔵する筐体をカバー部材により覆い、前記
カバー部材は前記筐体に対し固定する部分を合成樹脂材
で形成し、前記カバー部材の一部を金属部材で形成した
ことを特徴とする光偏向走査装置。6. An optical deflection scanning device for deflecting and scanning a light beam by rotationally driving a rotary polygon mirror, wherein a housing containing the rotary polygon mirror is covered with a cover member, and the cover member is provided with respect to the housing. An optical deflection scanning device characterized in that a fixed portion is formed of a synthetic resin material, and a part of the cover member is formed of a metal member.
増加する形状とした請求項６に記載の光偏向走査装置。7. The optical deflection scanning device according to claim 6, wherein the metal member is shaped to increase the surface area outside the housing.
の駆動ＩＣと接触させた請求項６に記載の光偏向走査装
置。8. The optical deflection scanning device according to claim 6, wherein the metal member is brought into contact with a drive IC on a drive substrate in the housing.
と一体成形した請求項６に記載の光偏向走査装置。9. The optical deflection scanning device according to claim 6, wherein the metal member is formed of sheet metal and is integrally molded with a synthetic resin portion.
光ビームを偏向走査する光偏向走査装置において、前記
回転多面鏡を内蔵する筐体にモータ及び駆動回路基板を
設け、該駆動回路基板は金属基板で形成し、該駆動回路
基板上の前記モータを制御する集積回路の反対面の基板
面に前記集積回路から放熱するための放熱部材を直接或
いは間接的に取り付け、前記放熱部材を前記筐体の底壁
を貫通して前記筐体の外部に突出させたことを特徴とす
る光偏向走査装置。10. An optical deflection scanning device for deflecting and scanning a light beam by rotationally driving a rotary polygon mirror, wherein a motor and a drive circuit board are provided in a housing containing the rotary polygon mirror, and the drive circuit board is made of metal. A heat radiation member for radiating heat from the integrated circuit is formed directly or indirectly on the substrate surface of the drive circuit board opposite to the integrated circuit for controlling the motor, and the heat radiation member is provided in the housing. An optical deflection scanning device, characterized in that the optical deflection scanning device penetrates a bottom wall of the housing and protrudes to the outside of the housing.
光ビームを偏向走査する光偏向走査装置において、前記
回転多面鏡を回転駆動するモータを有し、前記回転多面
鏡及び前記モータを内蔵する筐体の前記モータのハウジ
ングに放熱部材を設け、前記放熱部材の大部分を前記筐
体外部に突出させたことを特徴とする光偏向走査装置。11. An optical deflection scanning device for deflecting and scanning a light beam by rotationally driving a rotary polygonal mirror, comprising a motor for rotationally driving the rotary polygonal mirror, and a housing containing the rotary polygonal mirror and the motor. An optical deflection scanning device, characterized in that a heat dissipation member is provided on a housing of the motor of the body, and most of the heat dissipation member is projected to the outside of the housing.
熱部材と一体的に形成した請求項１１に記載の光偏向走
査装置。12. The optical deflection scanning device according to claim 11, wherein the housing of the motor is formed integrally with the heat dissipation member.
光ビームを偏向走査する光偏向走査装置において、前記
回転多面鏡及び前記回転多面鏡を回転駆動するモータ及
び前記光ビームを集光するレンズを内蔵する筐体を有
し、前記筐体と前記筐体を固定する板金との間に弾性熱
伝導体を挟設したことを特徴とする光偏向走査装置。13. An optical deflection scanning device for deflecting and scanning a light beam by rotationally driving a rotary polygon mirror, comprising: the rotary polygon mirror, a motor for rotationally driving the rotary polygon mirror, and a lens for condensing the light beam. An optical deflection scanning device having a built-in housing, wherein an elastic heat conductor is sandwiched between the housing and a metal plate for fixing the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25069092A JP3075497B2 (en) | 1992-08-25 | 1992-08-25 | Optical deflection scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25069092A JP3075497B2 (en) | 1992-08-25 | 1992-08-25 | Optical deflection scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0675184A true JPH0675184A (en) | 1994-03-18 |
| JP3075497B2 JP3075497B2 (en) | 2000-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25069092A Expired - Fee Related JP3075497B2 (en) | 1992-08-25 | 1992-08-25 | Optical deflection scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3075497B2 (en) |
Cited By (20)
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| JP2000002854A (en) * | 1998-06-15 | 2000-01-07 | Canon Inc | Light deflection scanning device and image forming device equipped therewith |
| JP2000305035A (en) * | 1999-02-18 | 2000-11-02 | Ricoh Co Ltd | Scanning optical device |
| US6195190B1 (en) | 1998-05-20 | 2001-02-27 | Minolta Co., Ltd. | Optical beam scanning device |
| JP2002162592A (en) * | 2000-11-29 | 2002-06-07 | Ricoh Co Ltd | Optical scanner and image forming device |
| JP2006010814A (en) * | 2004-06-23 | 2006-01-12 | Ricoh Co Ltd | Optical writing device and image forming apparatus |
| US7019878B2 (en) | 2003-03-19 | 2006-03-28 | Fuji Xerox Co., Ltd. | Optical deflector and optical scanner having the optical deflector |
| JP2006119276A (en) * | 2004-10-20 | 2006-05-11 | Toshiba Corp | Optical scanner |
| JP2006215267A (en) * | 2005-02-03 | 2006-08-17 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP2007033915A (en) * | 2005-07-27 | 2007-02-08 | Fuji Xerox Co Ltd | Optical scanner and image forming apparatus |
| JP2008003307A (en) * | 2006-06-22 | 2008-01-10 | Canon Inc | Optical scanner |
| JP2008033135A (en) * | 2006-07-31 | 2008-02-14 | Ricoh Co Ltd | Optical scanner and image forming apparatus equipped with the same |
| US7355617B2 (en) | 2002-12-12 | 2008-04-08 | Ricoh Company, Limited | Optical scanner and image forming apparatus |
| JP2010078836A (en) * | 2008-09-25 | 2010-04-08 | Fuji Xerox Co Ltd | Optical scanner and image-forming device |
| JP2010276983A (en) * | 2009-05-29 | 2010-12-09 | Brother Ind Ltd | Image forming apparatus and optical scanner |
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1992
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| US6195190B1 (en) | 1998-05-20 | 2001-02-27 | Minolta Co., Ltd. | Optical beam scanning device |
| US6449107B2 (en) | 1998-05-20 | 2002-09-10 | Minolta Co., Ltd. | Optical beam scanning device |
| JP2000002854A (en) * | 1998-06-15 | 2000-01-07 | Canon Inc | Light deflection scanning device and image forming device equipped therewith |
| JP2000305035A (en) * | 1999-02-18 | 2000-11-02 | Ricoh Co Ltd | Scanning optical device |
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| US7355617B2 (en) | 2002-12-12 | 2008-04-08 | Ricoh Company, Limited | Optical scanner and image forming apparatus |
| US7019878B2 (en) | 2003-03-19 | 2006-03-28 | Fuji Xerox Co., Ltd. | Optical deflector and optical scanner having the optical deflector |
| JP4541044B2 (en) * | 2004-06-23 | 2010-09-08 | 株式会社リコー | Optical writing apparatus and image forming apparatus |
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