JPH04324415A - Optical scanning device - Google Patents
Optical scanning deviceInfo
- Publication number
- JPH04324415A JPH04324415A JP3095354A JP9535491A JPH04324415A JP H04324415 A JPH04324415 A JP H04324415A JP 3095354 A JP3095354 A JP 3095354A JP 9535491 A JP9535491 A JP 9535491A JP H04324415 A JPH04324415 A JP H04324415A
- Authority
- JP
- Japan
- Prior art keywords
- detection mirror
- sheet metal
- angle
- cam
- cam sheet
- 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
- 230000003287 optical effect Effects 0.000 title claims description 20
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 230000002265 prevention Effects 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 abstract description 16
- 210000000078 claw Anatomy 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、レーザービームプリン
タ、レーザーフアクシミリ、複写機等で使用されている
光学走査装置に関するもので、特に走査されたレーザー
ビームを水平同期信号検出位置に向け反射するための検
出ミラーの取付け装置に関するものである。[Industrial Application Field] The present invention relates to an optical scanning device used in laser beam printers, laser facsimile machines, copying machines, etc., and in particular, the present invention relates to an optical scanning device that reflects a scanned laser beam toward a horizontal synchronization signal detection position. The present invention relates to a detection mirror mounting device for use in the detection mirror.
【0002】0002
【従来の技術】図7は従来の良く知られた光学走査装置
の平面図である。光学基板1へ光学箱2が四隅でねじ3
で固定される。被記録信号に対応して調整されたビーム
を射出する半導体のレーザユニツトからなる光源部4か
ら発光されたレーザービームはレンズ5で矢印方向に回
転する回転多面鏡8上に結像し回転多面鏡8で偏向走査
されて、レンズ6、7で感光ドラム9上に結像する。2. Description of the Related Art FIG. 7 is a plan view of a conventional well-known optical scanning device. Attach the optical box 2 to the optical board 1 with screws 3 at the four corners.
It is fixed at A laser beam emitted from a light source section 4 consisting of a semiconductor laser unit that emits a beam adjusted in accordance with the recorded signal is imaged by a lens 5 onto a rotating polygon mirror 8 that rotates in the direction of the arrow. The image is deflected and scanned by lens 8, and an image is formed on photosensitive drum 9 by lenses 6 and 7.
【0003】検出ミラー10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取付けられた光フアイバーチユ
ーブ11が備えられ、光フアイバチユーブにより運ばれ
たレーザビームは光コネクタ12により電気的な水平同
期信号に変換される。The detection mirror 10 reflects the laser beam scanned by the rotating polygon mirror 8 toward the horizontal synchronization signal detection position.
An optical fiber tube 11 with an incident surface attached to the imaging position is provided, and a laser beam carried by the optical fiber tube is converted into an electrical horizontal synchronizing signal by an optical connector 12.
【0004】レーザービームの結像をするレンズ5、6
、7は光学箱2のブラケツトにねじ13で固定された弾
性部材14に圧接固定されている。Lenses 5 and 6 for imaging the laser beam
, 7 are pressed and fixed to an elastic member 14 which is fixed to the bracket of the optical box 2 with a screw 13.
【0005】従来この種の光学走査装置の検出ミラーは
図8に示すような部品構成で、図9に示すように取り付
けられていた。すなわち、カム板金20に設けたカム形
状20bを利用し検出ミラーと一体化された板バネ(以
下検出ミラー板という)21のミラー部21bの角度2
5を図中の矢印の方向に調整しながら、所定の角度にな
った位置で基台23に設けた取付部23bにネジにより
カム板金20を固定するように取り付ける。Conventionally, the detection mirror of this type of optical scanning device had a component configuration as shown in FIG. 8, and was attached as shown in FIG. That is, the angle 2 of the mirror portion 21b of the plate spring (hereinafter referred to as the detection mirror plate) 21 that is integrated with the detection mirror by using the cam shape 20b provided on the cam sheet metal 20
5 in the direction of the arrow in the figure, the cam plate 20 is fixed to the mounting portion 23b provided on the base 23 at a predetermined angle using screws.
【0006】[0006]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成ではカム形状に不安定な領域が存在している。However, in the above configuration, there is an unstable region in the cam shape.
【0007】すなわち図10に示すように、カムの中心
から最も短距離である最小ポイント26から調整を始め
て中心より最も遠距離である最大ポイント27を飛び超
えて最小ポイント26aに移るところが非常に不安定で
ある。また、そのポイントは26〜27の間に存在して
いるポイントでもある。つまり27〜26aの間の区間
では、非常に不安定で調整しつくく、かつカムのセツト
後のわずかな外力でその固定位置がずれる可能性が大き
い。たとえば雰囲気温度による熱膨張で検出ミラー板の
位置が大きくズレてしまうことがある。このように検出
ミラーの位置がずれると水平同期検知がうまくできず、
その結果、感光体上の画像の書き出しポイントがずれた
り画像出力不能といった致命的な不具合が生じてしまう
。In other words, as shown in FIG. 10, the adjustment starts from the minimum point 26, which is the shortest distance from the center of the cam, and then jumps over the maximum point 27, which is the farthest distance from the center, and moves to the minimum point 26a. It is stable. Moreover, the point is also a point existing between 26 and 27. In other words, in the section between 27 and 26a, the cam is very unstable and difficult to adjust, and there is a high possibility that the fixed position of the cam will shift due to a slight external force after the cam is set. For example, the position of the detection mirror plate may shift significantly due to thermal expansion due to ambient temperature. If the position of the detection mirror shifts in this way, horizontal synchronization detection will not work properly.
As a result, fatal problems such as a shift in the writing start point of the image on the photoreceptor or an inability to output the image occur.
【0008】[0008]
【課題を解決するための手段】本発明は、走査されたレ
ーザービームを水平同期信号検出部に向け反射するため
の検出ミラーに角度調整機構を設け、その調整機構に過
調整防止機構を設ける構成をとっている。具体的には、
角度調整に用いるカム板金の過回転防止ストツパーを設
けることにより、図10で示した最大ポイント27から
最小ポイント26aへの動きを防止している。このよう
な構成をとれば、図10で示した最小ポイント26から
最大ポイント27の安定領域の間でカム板金の回転調整
を行なうことができる。よって、検出ミラーの組立作業
時の作業性が向上し、その作業の信頼性も向上する。ま
た組立作業後も検出ミラーの固定位置がずれにくい。[Means for Solving the Problems] The present invention provides a configuration in which a detection mirror for reflecting a scanned laser beam toward a horizontal synchronization signal detection section is provided with an angle adjustment mechanism, and the adjustment mechanism is provided with an over-adjustment prevention mechanism. is taking. in particular,
By providing a stopper for preventing over-rotation of the cam sheet metal used for angle adjustment, movement from the maximum point 27 to the minimum point 26a shown in FIG. 10 is prevented. With such a configuration, the rotation of the cam sheet metal can be adjusted within the stable region from the minimum point 26 to the maximum point 27 shown in FIG. Therefore, the work efficiency during the detection mirror assembly work is improved, and the reliability of the work is also improved. Furthermore, the fixed position of the detection mirror is unlikely to shift even after assembly.
【0009】[0009]
【実施例】図1、図2は本発明の光学走査装置の第1実
施例の構成を説明する図である。光学走査装置の全体構
成は図7を用いて説明した構成と同様であるのでここで
は省略し、走査されたレーザービームを水平同期信号検
出部に向け反射し導くための検出ミラーの角度調整部分
のみ説明する。また先の図8で説明した部材と同一又は
同等の部材には同一の符号を付し説明は省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are diagrams for explaining the structure of a first embodiment of an optical scanning device according to the present invention. The overall configuration of the optical scanning device is the same as the configuration explained using FIG. 7, so it will be omitted here, and only the angle adjustment part of the detection mirror that reflects and guides the scanned laser beam toward the horizontal synchronization signal detection section will be explained. explain. In addition, members that are the same as or equivalent to those described in FIG. 8 are given the same reference numerals, and explanations thereof will be omitted.
【0010】図1は部品構成を示し図2は組立て状態を
示す。同図に於て、21は過回転防止爪21cに付き検
出ミラー板、20は過回転防止爪20c付きカム板金、
23は基台である。FIG. 1 shows the component structure, and FIG. 2 shows the assembled state. In the figure, 21 is a detection mirror plate attached to the over-rotation prevention claw 21c, 20 is a cam plate with an over-rotation prevention claw 20c,
23 is a base.
【0011】検出ミラー板21の角度調整をカム板金2
0の回転を用いて行なう機構において、検出ミラー板2
1の角度を調整しながらカム板金20をまわしていくと
、カム板金20についている過回転防止爪20cと検出
ミラー板21についている過回転防止爪21cがぶつか
るので、図10における27から28aへの移動が禁止
され不安定領域がなくなり図3に示すように安定領域の
み存在するカム板金となり不安定領域での取り付け調整
を防止することができる。このように、カム板金に設け
られた過回転防止爪20cと検出ミラー板に設けられた
過回転防止爪21cによりカム板金の回転範囲(調整範
囲)を規制し不安定領域での取り付け調整を防止してい
る。The angle of the detection mirror plate 21 is adjusted using the cam plate 2.
In a mechanism using zero rotation, the detection mirror plate 2
As the cam plate 20 is rotated while adjusting the angle of 1, the over-rotation prevention claw 20c attached to the cam plate 20 collides with the over-rotation prevention claw 21c attached to the detection mirror plate 21, so the rotation from 27 to 28a in FIG. Movement is prohibited and there is no unstable area, resulting in a cam plate metal with only a stable area as shown in FIG. 3, and installation adjustment in the unstable area can be prevented. In this way, the over-rotation prevention pawl 20c provided on the cam sheet metal and the over-rotation prevention pawl 21c provided on the detection mirror plate regulate the rotation range (adjustment range) of the cam sheet metal and prevent installation adjustment in unstable areas. are doing.
【0012】図4、図5、図6は他の実施例を表わす図
面であり、図4は部品構成を示し、図5及び図6は組立
状態を示す。同図に於て、21は検出ミラー板、20は
カム板金、23は基台である。そしてその基台にミラー
板の過調整防止のストツパー24を設けている。FIGS. 4, 5, and 6 are drawings showing other embodiments, with FIG. 4 showing a component configuration and FIGS. 5 and 6 showing an assembled state. In the figure, 21 is a detection mirror plate, 20 is a cam plate, and 23 is a base. A stopper 24 is provided on the base to prevent over-adjustment of the mirror plate.
【0013】検出ミラー板21の角度調整をカム板金2
0で行なう機構において、カム板金20の不安定領域を
防止する為に、図6に示すようにカム板金20が最大ポ
イント近くになったとき検出ミラー板21がストツパー
24にぶつかり、それ以上カム板金20が回転できない
ようになるので、図3に示すように安定領域のみ存在す
るカム板金となり、不安定領域での取り付け調整を防止
することができる。このようにストツパー24により検
出ミラー板21の角度の過調整を防止し、カム板金20
の過回転を防止している。The angle of the detection mirror plate 21 is adjusted using the cam plate 2.
In order to prevent the cam sheet metal 20 from becoming unstable in the mechanism in which the cam sheet metal 20 is operated at zero, the detection mirror plate 21 collides with the stopper 24 when the cam sheet metal 20 approaches the maximum point as shown in FIG. Since 20 cannot be rotated, the cam plate is made up of only a stable region as shown in FIG. 3, and installation adjustment in the unstable region can be prevented. In this way, the stopper 24 prevents over-adjustment of the angle of the detection mirror plate 21, and the cam plate 20
prevents over-rotation.
【0014】[0014]
【発明の効果】以上説明したように、本発明は、走査さ
れたレーザービームを水平同期信号検出部に向け反射す
るための検出ミラーの角度調整機構を設け、その調整機
構に過調整防止機構を設けることにより、検出ミラーの
角度調整及び調整後の固定を安定領域で行なう。このよ
うに調整機構を安定領域で使用することにより下記のよ
うな効果がある。As explained above, the present invention provides an angle adjustment mechanism for a detection mirror for reflecting a scanned laser beam toward a horizontal synchronization signal detection section, and includes an over-adjustment prevention mechanism in the adjustment mechanism. By providing this, the angle adjustment of the detection mirror and the fixation after adjustment are performed in the stable region. By using the adjustment mechanism in the stable region in this way, the following effects can be obtained.
【0015】(1) 組立作業時に不安定領域を気に
しなくてよいので作業性が向上する。(1) Work efficiency is improved because there is no need to worry about unstable areas during assembly work.
【0016】(2) 組立作業時に不安定領域を防止
してあるので組立作業の信頼性が向上する。(2) Since unstable areas are prevented during assembly, the reliability of assembly is improved.
【0017】(3) 組立完了後、熱膨張などの外力
をうけても固定位置がずれにくい。(3) After assembly is completed, the fixed position is unlikely to shift even if subjected to external forces such as thermal expansion.
【0018】以上のような効果を製造コストを上げずに
得られる。[0018] The above effects can be obtained without increasing manufacturing costs.
【図1】本発明の光学走査装置の検出ミラーの角度調整
機構の第1実施例の構成を説明する図である。FIG. 1 is a diagram illustrating the configuration of a first embodiment of a detection mirror angle adjustment mechanism of an optical scanning device according to the present invention.
【図2】本発明の光学走査装置の検出ミラーの角度調整
機構の第1実施例の構成を説明する図である。FIG. 2 is a diagram illustrating the configuration of a first embodiment of a detection mirror angle adjustment mechanism of the optical scanning device of the present invention.
【図3】検出ミラーの角度調整機構に過調整防止機構が
ついた時の調整角度と偏心量の関係を説明する図である
。FIG. 3 is a diagram illustrating the relationship between the adjustment angle and the amount of eccentricity when the angle adjustment mechanism of the detection mirror is provided with an overadjustment prevention mechanism.
【図4】本発明の光学走査装置の検出ミラーの角度調整
機構の第2実施例の構成を説明する図である。FIG. 4 is a diagram illustrating the configuration of a second embodiment of the angle adjustment mechanism of the detection mirror of the optical scanning device of the present invention.
【図5】本発明の光学走査装置の検出ミラーの角度調整
機構の第2実施例の構成を説明する図である。FIG. 5 is a diagram illustrating the configuration of a second embodiment of the angle adjustment mechanism of the detection mirror of the optical scanning device of the present invention.
【図6】本発明の光学走査装置の検出ミラーの角度調整
機構の第2実施例の構成を説明する図である。FIG. 6 is a diagram illustrating the configuration of a second embodiment of the angle adjustment mechanism of the detection mirror of the optical scanning device of the present invention.
【図7】走査光学装置の全体構成を説明する平面図であ
る。FIG. 7 is a plan view illustrating the overall configuration of the scanning optical device.
【図8】従来の検出ミラーの角度調整機構の構成を説明
する図である。FIG. 8 is a diagram illustrating the configuration of a conventional angle adjustment mechanism for a detection mirror.
【図9】従来の検出ミラーの角度調整機構の構成を説明
する図である。FIG. 9 is a diagram illustrating the configuration of a conventional angle adjustment mechanism for a detection mirror.
【図10】検出ミラーの角度調整機構の調整角度と偏心
量の関係を説明する図である。FIG. 10 is a diagram illustrating the relationship between the adjustment angle of the angle adjustment mechanism of the detection mirror and the amount of eccentricity.
【符号の説明】 4 光源部 8 回転多面鏡 10 検出ミラー 12 光コネクタ 20 カム板金 20c 過回転防止爪 21 検出ミラー板 21c 過回転防止爪 23 基台[Explanation of symbols] 4 Light source section 8 Rotating polygon mirror 10 Detection mirror 12 Optical connector 20 Cam sheet metal 20c Over-rotation prevention claw 21 Detection mirror plate 21c Over-rotation prevention claw 23 Base
Claims (1)
ーザービームを走査する走査手段と、該走査手段により
走査されたレーザービームの一部を反射する検出ミラー
と、該反射されたレーザービームを受光部により受光し
て水平同期信号として検出する検出部とを有する光学走
査装置に於て、前記検出ミラーに角度調整機構を設け、
その調整機構に過調整防止機構を設けたことを特徴とす
る光学走査装置。1. A light source section, a scanning means for scanning a laser beam emitted from the light source section, a detection mirror for reflecting a part of the laser beam scanned by the scanning means, and the reflected laser beam. In an optical scanning device, the detection mirror is provided with an angle adjustment mechanism;
An optical scanning device characterized in that the adjustment mechanism is provided with an over-adjustment prevention mechanism.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3095354A JPH04324415A (en) | 1991-04-25 | 1991-04-25 | Optical scanning device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3095354A JPH04324415A (en) | 1991-04-25 | 1991-04-25 | Optical scanning device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04324415A true JPH04324415A (en) | 1992-11-13 |
Family
ID=14135325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3095354A Pending JPH04324415A (en) | 1991-04-25 | 1991-04-25 | Optical scanning device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04324415A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11187218A (en) * | 1997-12-18 | 1999-07-09 | Sharp Corp | Scanner |
-
1991
- 1991-04-25 JP JP3095354A patent/JPH04324415A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11187218A (en) * | 1997-12-18 | 1999-07-09 | Sharp Corp | Scanner |
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