JPH0784203A - Optical scanner - Google Patents
Optical scannerInfo
- Publication number
- JPH0784203A JPH0784203A JP18450393A JP18450393A JPH0784203A JP H0784203 A JPH0784203 A JP H0784203A JP 18450393 A JP18450393 A JP 18450393A JP 18450393 A JP18450393 A JP 18450393A JP H0784203 A JPH0784203 A JP H0784203A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- scanning device
- optical scanning
- optical
- planar body
- 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.)
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Links
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Laser Beam Printer (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーザビームプリン
タ、レーザファクシミリ等の画像記録装置に用いられる
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 image recording device such as a laser beam printer and a laser facsimile.
【０００２】[0002]
【従来の技術】従来、この種の光走査装置は、画像信号
によって変調された光を高速回転される回転多面鏡等か
らなる光偏向器によって偏向走査して感光体に照射する
ように構成されている。このため、前記光偏向器が振動
源となって光走査装置を構成する枠体や光学部品等が励
振されて振動し、この振動によって画素ずれや濃度むら
等の画像不良が発生する。そこで、前記枠体の底板や側
板の肉厚を大きくしたり、これらに防振材を貼付けるこ
とにより、画像不良の発生を防止していた。2. Description of the Related Art Conventionally, an optical scanning device of this type is constructed so that light modulated by an image signal is deflected and scanned by an optical deflector such as a rotating polygon mirror which is rotated at a high speed to irradiate a photoconductor. ing. Therefore, the optical deflector serves as a vibration source to excite and vibrate the frame body, optical components, and the like that form the optical scanning device, and this vibration causes image defects such as pixel shift and density unevenness. Therefore, the occurrence of image defects is prevented by increasing the thickness of the bottom plate or side plate of the frame body or by attaching a vibration isolator to these.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記従来の技術
は、十分な防振効果が得られず、画像不良が発生すると
いう問題点があった。However, the above-mentioned conventional techniques have a problem that a sufficient image stabilizing effect cannot be obtained and an image defect occurs.
【０００４】本発明は、上記従来の技術の有する問題点
に鑑みてなされたものであって、光偏向器によって励振
される光走査装置の振動を十分に低減して画像不良の発
生を防止することを目的とするものである。The present invention has been made in view of the above problems of the prior art, and sufficiently reduces the vibration of the optical scanning device excited by the optical deflector to prevent the occurrence of image defects. That is the purpose.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の光走査装置は、画像信号によって変調され
た光を偏向走査する光偏向器を備えた光走査装置におい
て、前記光偏向器によって励振されて振動する前記光走
査装置を構成する部材のうちの少なくとも一つの部材
に、前記振動を抑制するための動吸振器を設けたことを
特徴とするものである。To achieve the above object, the optical scanning device of the present invention is an optical scanning device including an optical deflector for deflecting and scanning light modulated by an image signal. A dynamic vibration reducer for suppressing the vibration is provided on at least one of the members constituting the optical scanning device which is excited by the vibration and vibrates.
【０００６】また、動吸振器が、粘弾性体および前記粘
弾性体に取付けられた重錘と、前記重錘を励振するため
の加振手段と、光走査装置を構成する部材の振動を検知
するための検知手段と、前記検知手段によって検知され
た振動に基いて前記加振手段を制御する制御装置からな
るものとすると効果的である。Further, the dynamic vibration absorber detects the viscoelastic body, the weight attached to the viscoelastic body, the vibrating means for exciting the weight, and the vibration of the members constituting the optical scanning device. It is effective to include a detecting unit for controlling the vibration and a control device for controlling the vibrating unit based on the vibration detected by the detecting unit.
【０００７】[0007]
【作用】動吸振器によって光走査装置の振動が抑制され
るので、振動に起因する画像不良の発生が防止される。Since the vibration of the optical scanning device is suppressed by the dynamic vibration reducer, it is possible to prevent the occurrence of image defects due to the vibration.
【０００８】[0008]
【実施例】本発明の実施例を図面に基いて説明する。Embodiments of the present invention will be described with reference to the drawings.
【０００９】図１は第１実施例の説明図であって、本実
施例の光走査装置は、コイルばねによりモデル化される
側板７によって支持された光走査装置を構成する部材の
一つである板状体２と、板状体２に取付けられたモータ
等よりなる駆動機構３ａによって高速回転される回転多
面鏡３からなる光偏向器と、該回転多面鏡３によって偏
向走査された画像信号によって変調された光であるレー
ザ光Ｌを所定のビーム形状に集光して感光体６に結像す
るためのレンズ系４と、レンズ系４によって集光された
レーザ光Ｌを前記感光体６に導く折返しミラー５と、板
状体２の上面の適宜部位に設けられた動吸振器１を構成
する粘弾性体９および粘弾性体９に取付けられた重錘８
を備えている。FIG. 1 is an explanatory view of the first embodiment. The optical scanning device of this embodiment is one of the members constituting the optical scanning device supported by a side plate 7 modeled by a coil spring. An optical deflector including a certain plate-shaped body 2, a rotary polygon mirror 3 that is rotated at a high speed by a drive mechanism 3a including a motor attached to the plate-shaped body 2, and an image signal deflected and scanned by the rotary polygon mirror 3. The lens system 4 for condensing the laser beam L, which is the light modulated by the, into a predetermined beam shape to form an image on the photoconductor 6, and the laser beam L condensed by the lens system 4 And a viscoelastic body 9 constituting the dynamic vibration reducer 1 provided at an appropriate site on the upper surface of the plate-like body 2 and a weight 8 attached to the viscoelastic body 9.
Is equipped with.
【００１０】本実施例において、重錘８の質量と粘弾性
体９のばね定数および粘性係数は、板状体２の質量とコ
イルばねによりモデル化される側板７のばね定数および
粘性係数に対応して決定する。また、粘弾性体９は、ゴ
ム製のブロック、ばね、空気や油を用いたダンパまたは
これらを組合わせたものとすることができる。In this embodiment, the mass of the weight 8 and the spring constant and viscosity coefficient of the viscoelastic body 9 correspond to the mass of the plate-like body 2 and the spring constant and viscosity coefficient of the side plate 7 modeled by the coil spring. And decide. Further, the viscoelastic body 9 may be a rubber block, a spring, a damper using air or oil, or a combination thereof.
【００１１】本実施例において、回転多面鏡３は毎分数
万回転におよぶ高速回転を行うため、これに起因して板
状体２が励振されて矢印Ａで示す垂直方向へ振動する
が、前記動吸振器１によって板状体２の振動が抑制され
るため、画像不良の発生が防止される。In this embodiment, since the rotary polygon mirror 3 rotates at a high speed of tens of thousands of revolutions per minute, the plate-like body 2 is excited and vibrates in the vertical direction indicated by the arrow A due to this. Since the vibration of the plate-shaped body 2 is suppressed by the dynamic vibration reducer 1, the occurrence of image defects is prevented.
【００１２】図２は第２実施例の説明図であって、本実
施例の光走査装置は、第１実施例の板状体２を支持する
コイルばねではなく板ばねによりモデル化される側板１
７によって板状体２を支持し、板状体２の振動方向Ｂと
同方向の一端面に粘弾性体１９および粘弾性体１９に取
付けられた重錘１８からなる動吸振器１１を取付けたも
のであって、その他の部分は第１実施例と同様であるの
で同一符号を付して説明は省略する。FIG. 2 is an explanatory view of the second embodiment. In the optical scanning device of this embodiment, a side plate modeled by a leaf spring is used instead of the coil spring supporting the plate-shaped body 2 of the first embodiment. 1
The plate-shaped body 2 is supported by 7 and a dynamic vibration absorber 11 including a viscoelastic body 19 and a weight 18 attached to the viscoelastic body 19 is attached to one end face of the plate-shaped body 2 in the same direction as the vibration direction B. Since the other parts are the same as those in the first embodiment, the same reference numerals are given and the description thereof will be omitted.
【００１３】本実施例では板状体２は矢印Ｂで示す水平
方向に振動するが、板状体２の前記一端面に取付けられ
た動吸振器１１によって板状体２の振動が抑制されるた
め、画像不良の発生が防止される。In this embodiment, the plate-shaped body 2 vibrates in the horizontal direction indicated by arrow B, but the vibration of the plate-shaped body 2 is suppressed by the dynamic vibration absorber 11 attached to the one end surface of the plate-shaped body 2. Therefore, the occurrence of defective images is prevented.
【００１４】図３は第３実施例の主要部の説明図であっ
て、本実施例の光走査装置は、板状体２の上面の適宜部
位に第１の粘弾性体２９ａおよび第１の粘弾性体２９ａ
に取付けられた第１の重錘２８ａからなる第１の動吸振
器２１ａを取付けるとともに、板状体２の一端面に第２
の粘弾性体２９ｂおよび第２の粘弾性体２９ｂに取付け
られた第２の重錘２８ｂからなる第２の動吸振器２１ｂ
を取付けたものである。その他の点については第１実施
例と同様でよいので説明は省略する。FIG. 3 is an explanatory view of the main part of the third embodiment. In the optical scanning device of the present embodiment, the first viscoelastic body 29a and the first viscoelastic body 29a are provided at appropriate positions on the upper surface of the plate-like body 2. Viscoelastic body 29a
The first dynamic vibration absorber 21a composed of the first weight 28a attached to the
Second dynamic vibration absorber 21b composed of the viscoelastic body 29b and the second weight 28b attached to the second viscoelastic body 29b.
Is attached. The other points may be the same as those in the first embodiment, and the description thereof will be omitted.
【００１５】本実施例では、矢印Ｃおよび矢印Ｄで示す
二方向の振動が減衰される。In this embodiment, vibrations in two directions indicated by arrows C and D are damped.
【００１６】図４は第４実施例の主要部の説明図であっ
て、本実施例の光走査装置は、板状体２の上面の適宜部
位に第１の粘弾性体３９ａを介して重錘３８を取付ける
とともに、重錘３８を間に挟むように一対の固定部材４
０ａ，４０ｂを板状体２の上面に突設して、一方の固定
部材４０ａと重錘３８との間に第２の粘弾性体３９ｂを
介在させ、他方の固定部材４０ｂと重錘３８との間に第
３の粘弾性体３９ｃを介在させることによって構成され
た動吸振器３１を備えている。その他の点は上記第１実
施例と同様でよいので説明は省略する。FIG. 4 is an explanatory view of the main part of the fourth embodiment. In the optical scanning device of the present embodiment, an appropriate portion of the upper surface of the plate-like body 2 is overlaid with a first viscoelastic body 39a. The weight 38 is attached and the pair of fixing members 4 are sandwiched between the weights 38.
0a and 40b are projected on the upper surface of the plate-like body 2, a second viscoelastic body 39b is interposed between one fixing member 40a and the weight 38, and the other fixing member 40b and the weight 38 are provided. The dynamic vibration absorber 31 is configured by interposing the third viscoelastic body 39c between the two. The other points may be the same as those in the first embodiment, and the description thereof will be omitted.
【００１７】本実施例では、矢印Ｅおよび矢印Ｆで示す
二方向の振動が減衰される。In this embodiment, vibrations in the two directions indicated by arrows E and F are damped.
【００１８】図５は第５実施例の説明図であって、本実
施例の動吸振器４１は、板状体２の上面に第１および第
２の粘弾性体４９ａ，４９ｂを介して支持された重錘４
８と、重錘４８を励振させるための積層型の圧電素子等
からなる加振手段５０と、板状体２の振動を検知するた
めの検知手段である加速度センサ等からなる振動検知手
段５１ａと、振動検知手段５１ａによって検知された振
動に基いて加振手段５０を制御する制御装置５１を備
え、振動検知手段５１ａと制御装置５１とはアンプ５１
ｂを介して電気的に接続されている。その他の部分につ
いては第１実施例と同様でよいので第１実施例と同一符
号で付して説明は省略する。FIG. 5 is an explanatory view of the fifth embodiment, in which the dynamic vibration reducer 41 is supported on the upper surface of the plate-like body 2 via first and second viscoelastic bodies 49a and 49b. Weight 4
8, a vibrating means 50 composed of a laminated piezoelectric element or the like for exciting the weight 48, and a vibration detection means 51a composed of an acceleration sensor or the like which is a detection means for detecting the vibration of the plate-shaped body 2. , A control device 51 for controlling the vibrating means 50 based on the vibration detected by the vibration detection means 51a, and the vibration detection means 51a and the control device 51 are amplifiers 51.
It is electrically connected via b. The other parts may be the same as those in the first embodiment, and are therefore assigned the same reference numerals as those in the first embodiment and will not be described.
【００１９】本実施例では、加振手段５０によって重錘
４８を励振するので、特に衝撃的な振動に対する振動抑
制効果が大きい。また、上述した動吸振器４１は、異な
る方向の振動を抑制するために、各振動方向に対応して
２個以上設けてもよい。In this embodiment, since the weight 48 is excited by the vibrating means 50, the effect of suppressing vibration, particularly against shock vibration, is great. Further, in order to suppress vibration in different directions, two or more dynamic vibration absorbers 41 described above may be provided corresponding to each vibration direction.
【００２０】[0020]
【発明の効果】本発明は、上述のとおり構成されている
ので、次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.
【００２１】動吸振器によって光走査装置の振動が抑制
されるため、画像不良の発生が防止される。Since the vibration of the optical scanning device is suppressed by the dynamic vibration reducer, the occurrence of image defects is prevented.
【図１】第１実施例の光走査装置の説明図である。FIG. 1 is an explanatory diagram of an optical scanning device according to a first embodiment.
【図２】第２実施例の光走査装置の説明図である。FIG. 2 is an explanatory diagram of an optical scanning device according to a second embodiment.
【図３】第３実施例の光走査装置の主要部の説明図であ
る。FIG. 3 is an explanatory diagram of a main part of an optical scanning device according to a third embodiment.
【図４】第４実施例の光走査装置の主要部の説明図であ
る。FIG. 4 is an explanatory diagram of a main part of an optical scanning device according to a fourth embodiment.
【図５】第５実施例の光走査装置の説明図である。FIG. 5 is an explanatory diagram of an optical scanning device according to a fifth embodiment.
１，１１，２１ａ，２１ｂ，３１，４１ 動吸振器 ２ 板状体 ３ 回転多面鏡 ３ａ 駆動機構 ４ レンズ系 ５ 折返しミラー ６ 感光体 ７ コイルばねによりモデル化される側板 ８，１８，２８ａ，２８ｂ，３８，４８ 重錘 ９，１９，２９ａ，２９ｂ，３９ａ，３９ｂ，３９ｃ，
４９ａ，４９ｂ 粘弾性体 １７ 板ばねによりモデル化される側板 ５０ 加振手段 ５１ 制御装置 ５１ａ 振動検知手段 ５１ｂ アンプ1, 11, 21a, 21b, 31, 41 Dynamic absorber 2 Plate-like body 3 Rotating polygonal mirror 3a Driving mechanism 4 Lens system 5 Folding mirror 6 Photoconductor 7 Side plate modeled by coil spring 8, 18, 28a, 28b , 38, 48 Weights 9, 19, 29a, 29b, 39a, 39b, 39c,
49a, 49b Viscoelastic body 17 Side plate modeled by a leaf spring 50 Excitation means 51 Control device 51a Vibration detection means 51b Amplifier
Claims (4)
査する光偏向器を備えた光走査装置において、 前記光偏向器によって励振されて振動する前記光走査装
置を構成する部材のうちの少なくとも一つの部材に、前
記振動を抑制するための動吸振器を設けたことを特徴と
する光走査装置。1. An optical scanning device comprising an optical deflector for deflecting and scanning light modulated by an image signal, wherein at least one of members constituting the optical scanning device excited and vibrated by the optical deflector. An optical scanning device, characterized in that one member is provided with a dynamic vibration reducer for suppressing the vibration.
体に取付けられた重錘からなることを特徴とする請求項
１記載の光走査装置。2. The optical scanning device according to claim 1, wherein the dynamic vibration reducer comprises a viscoelastic body and a weight attached to the viscoelastic body.
体に取付けられた重錘と、前記重錘を励振するための加
振手段と、光走査装置を構成する部材の振動を検知する
ための検知手段と、前記検知手段によって検知された振
動に基いて前記加振手段を制御する制御装置からなるこ
とを特徴とする請求項１記載の光走査装置。3. A dynamic vibration reducer detects vibration of a viscoelastic body, a weight attached to the viscoelastic body, a vibrating unit for exciting the weight, and a vibration of a member forming the optical scanning device. 2. The optical scanning device according to claim 1, further comprising a detection unit for controlling the vibration, and a control device for controlling the vibration unit based on the vibration detected by the detection unit.
される回転多面鏡を備えたものであることを特徴とする
請求項１乃至３いずれか１項記載の光走査装置。4. The optical scanning device according to claim 1, wherein the optical deflector includes a rotary polygon mirror that is rotated at a high speed by a driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18450393A JP3184370B2 (en) | 1993-06-29 | 1993-06-29 | Optical scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18450393A JP3184370B2 (en) | 1993-06-29 | 1993-06-29 | Optical scanning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0784203A true JPH0784203A (en) | 1995-03-31 |
| JP3184370B2 JP3184370B2 (en) | 2001-07-09 |
Family
ID=16154333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18450393A Expired - Fee Related JP3184370B2 (en) | 1993-06-29 | 1993-06-29 | Optical scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3184370B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877884A (en) * | 1995-12-29 | 1999-03-02 | Fuji Xerox Co., Ltd. | Light scanning device |
| CN100460704C (en) * | 2005-08-25 | 2009-02-11 | 三星电子株式会社 | Vibration absorber and light scanning unit having the same |
| JP2012008233A (en) * | 2010-06-23 | 2012-01-12 | Ricoh Co Ltd | Optical scanning device and image forming apparatus |
| JP2016224258A (en) * | 2015-05-29 | 2016-12-28 | キヤノン株式会社 | Optical scanner and image forming apparatus |
| WO2020008750A1 (en) * | 2018-07-05 | 2020-01-09 | パナソニックＩｐマネジメント株式会社 | Image display apparatus and optical device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9975350B2 (en) | 2015-05-29 | 2018-05-22 | Canon Kabushiki Kaisha | Light scanning apparatus |
-
1993
- 1993-06-29 JP JP18450393A patent/JP3184370B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877884A (en) * | 1995-12-29 | 1999-03-02 | Fuji Xerox Co., Ltd. | Light scanning device |
| CN100460704C (en) * | 2005-08-25 | 2009-02-11 | 三星电子株式会社 | Vibration absorber and light scanning unit having the same |
| JP2012008233A (en) * | 2010-06-23 | 2012-01-12 | Ricoh Co Ltd | Optical scanning device and image forming apparatus |
| US8754918B2 (en) | 2010-06-23 | 2014-06-17 | Ricoh Company, Ltd. | Optical scanner and image forming apparatus including same |
| JP2016224258A (en) * | 2015-05-29 | 2016-12-28 | キヤノン株式会社 | Optical scanner and image forming apparatus |
| WO2020008750A1 (en) * | 2018-07-05 | 2020-01-09 | パナソニックＩｐマネジメント株式会社 | Image display apparatus and optical device |
| JPWO2020008750A1 (en) * | 2018-07-05 | 2021-08-05 | パナソニックＩｐマネジメント株式会社 | Image display device and optical equipment |
| US11307426B2 (en) | 2018-07-05 | 2022-04-19 | Panasonic Intellectual Property Management Co., Ltd. | Image display apparatus and optical device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3184370B2 (en) | 2001-07-09 |
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