JP2909841B2 - Optical deflector - Google Patents
Optical deflectorInfo
- Publication number
- JP2909841B2 JP2909841B2 JP25534890A JP25534890A JP2909841B2 JP 2909841 B2 JP2909841 B2 JP 2909841B2 JP 25534890 A JP25534890 A JP 25534890A JP 25534890 A JP25534890 A JP 25534890A JP 2909841 B2 JP2909841 B2 JP 2909841B2
- Authority
- JP
- Japan
- Prior art keywords
- hub
- magnet
- rotating shaft
- shaped
- optical deflector
- 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.)
- Expired - Fee Related
Links
Landscapes
- Mechanical Optical Scanning Systems (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、レーザープリンタ等の光走査に用いられる
光偏向器の構成に関するものである。Description: TECHNICAL FIELD The present invention relates to a configuration of an optical deflector used for optical scanning of a laser printer or the like.
（従来の技術） 従来、光偏向器の構成としては、概略第１図に示す本
発明に係わる構成と同様と同様なものであったが、回転
軸１とハブ７とを５〜25μｍの圧入により固着したもの
であった。(Prior Art) Conventionally, the configuration of an optical deflector is the same as the configuration according to the present invention shown in FIG. 1, but the rotary shaft 1 and the hub 7 are press-fitted with 5 to 25 μm. Was fixed.
（発明が解決しようとする課題） しかし、前記従来例では、回転軸１とハブ７との圧入
代が大きく圧入時に多大な荷重をかけて圧入を行うた
め、第２図に示すょうに回転軸１とハブ７内径とのかじ
りにより多面鏡８に理想回転軸Ｚに対する倒れ角θ及び
その経時的変化Δθが生じることで、多面鏡８によるレ
ーザ光の走査精度の低下、ひいてはレーザープリンタ等
への応用における印字精度の低下の問題が発生してい
た。(Problems to be Solved by the Invention) However, in the conventional example, since the press-fitting margin between the rotary shaft 1 and the hub 7 is large and a large load is applied at the time of press-fitting, the rotary shaft shown in FIG. 1 and the inner diameter of the hub 7 generate a tilt angle θ with respect to the ideal rotation axis Z and its temporal change Δθ in the polygon mirror 8, thereby lowering the scanning accuracy of the laser beam by the polygon mirror 8, and consequently the laser printer or the like. There has been a problem of a decrease in printing accuracy in application.
（課題を解決するための手段） 本発明は、前記課題を解決するためになされたもの
で、実施例に対応する第１図で説明すると、ステンレス
鋼よりなる回転軸１に多角形の多面鏡８、黄銅又はアル
ミ合金よりなるハブ７、カップ状の回転コア９、リング
状のメインマグネット10及びFGマグネット11をそれぞれ
固着し、更に中央にパイプ状の突出部6aを配設したカッ
プ状のケース６にメインマグネット10及びFGマグネット
11と対向して、マグネットワイヤ13を巻回したコア12、
FGパターン及びホール素子15を配設した基板16及びポス
ト14を固着し、ケース６の突出部6a内に第１のボールベ
アリング３、カラー５、予圧ばね４、第２のボールベア
リング２を挿入し、前記回転軸１を軸支して構成される
光偏向器において、 上記回転軸１と上記ハブ７との固着を、圧入代１〜７
ミクロンの軽圧入と嫌気性接着剤による接着を併用して
固着したものである。(Means for Solving the Problems) The present invention has been made to solve the problems described above. Referring to FIG. 1 corresponding to the embodiment, a polygonal polygon mirror is provided on a rotating shaft 1 made of stainless steel. 8, a cup-shaped case in which a hub 7 made of brass or an aluminum alloy, a cup-shaped rotating core 9, a ring-shaped main magnet 10 and a FG magnet 11 are fixed, and a pipe-shaped protrusion 6a is provided in the center. 6 Main magnet 10 and FG magnet
A core 12 wound with a magnet wire 13 in opposition to 11,
The substrate 16 on which the FG pattern and the Hall element 15 are disposed and the post 14 are fixed, and the first ball bearing 3, the collar 5, the preload spring 4, and the second ball bearing 2 are inserted into the protrusion 6a of the case 6. An optical deflector configured to pivotally support the rotating shaft 1, wherein the fixing of the rotating shaft 1 and the hub 7 is performed by press-fitting allowances 1 to 7.
It is fixed by using both micron light press-fitting and anaerobic adhesive bonding.
（作用） 本発明によれば、回転軸１とハブ７との圧入代が１〜
７ミクロンと小さいため、第２図に示すように回転軸１
とハブ７のかじりによる多面鏡８の理想回転軸Ｚに対す
る倒れ角θがほとんど生じず、接着剤を併用しているこ
とと合わせ、倒れ角θの経時的変化Δθもほとんど除去
される。また、回転軸１とハブ７との固着強度も、接着
剤により充分なものとなる。(Operation) According to the present invention, the press-fitting margin between the rotary shaft 1 and the hub 7 is 1 to 1.
Since it is as small as 7 microns, as shown in FIG.
The angle of inclination of the polygon mirror 8 with respect to the ideal rotation axis Z due to the galling of the hub 7 and the hub 7 hardly occurs. In addition to the use of the adhesive, the temporal change Δθ of the angle of inclination θ is almost eliminated. Further, the adhesive strength between the rotating shaft 1 and the hub 7 is also sufficient.
（実施例） 第１図は本発明による光偏向器の一実施例を示す図
で、１は回転軸、７は回転軸１に固着したハブ、8,9は
それぞれハブ７に固着した多角形の多面鏡及びカップ状
の回転コア、10,11はそれぞれカップ状の回転コア９の
内側に固着したリング状のメインマグネット及びFGマグ
ネットである。(Embodiment) FIG. 1 shows an embodiment of an optical deflector according to the present invention, wherein 1 is a rotating shaft, 7 is a hub fixed to the rotating shaft 1, and 8 and 9 are polygons fixed to the hub 7, respectively. Are a polygonal mirror and a cup-shaped rotary core, and 10 and 11 are a ring-shaped main magnet and a FG magnet fixed inside the cup-shaped rotary core 9, respectively.
６は中央にパイプ状の突出部6aを配設したカップ状の
ケースで、このケース６にメインマグネット10及びFGマ
グネット11と対向して、マグネットワイヤ13を巻回した
コア12、FGパターン及びホール素子15を配設した基板16
及びポスト14が固着されている。Reference numeral 6 denotes a cup-shaped case in which a pipe-shaped projection 6a is disposed in the center. The case 12 faces the main magnet 10 and the FG magnet 11, and has a core 12, a FG pattern, and a hole around which a magnet wire 13 is wound. Substrate 16 on which element 15 is arranged
The post 14 is fixed.
更にケース６の突出部6a内に第１のボールベアリング
３、カラー５、予圧ばね４、第２のボールベアリング２
が挿入されて、回転軸１を軸支している。Further, the first ball bearing 3, the collar 5, the preload spring 4, and the second ball bearing 2 are provided in the protrusion 6 a of the case 6.
Is inserted to support the rotating shaft 1.
このように構成された光偏向器において、回転軸１は
ステンレス鋼よりなり、ハブ７は黄銅又はアルミ合金よ
りなる。In the optical deflector thus configured, the rotating shaft 1 is made of stainless steel, and the hub 7 is made of brass or an aluminum alloy.
この回転軸１とハブ７との固着は、圧入代１〜７ミク
ロンの軽圧入と嫌気性接着剤による接着を併用する。The fixing of the rotating shaft 1 and the hub 7 is performed by using both light press-fitting with a press-fitting allowance of 1 to 7 microns and bonding with an anaerobic adhesive.
本発明によれば、回転軸１とハブ７との圧入代が１〜
７ミクロンと小さいため、第２図に示すような回転軸１
とハブ７のかじりによる多面鏡８の理想回転軸Ｚに対す
る倒れ角θがほとんど生じず、接着剤を併用しているこ
とと合わせ、倒れ角θの経時的変化Δθもほとんど除去
され、回転軸１とハブ７との固着強度も、接着剤により
充分なものとなる。According to the present invention, the press-fitting allowance between the rotating shaft 1 and the hub 7 is 1 to
Since it is as small as 7 microns, the rotating shaft 1 shown in FIG.
Angle of the polygon mirror 8 with respect to the ideal rotation axis Z due to the galling of the hub 7 and the hub 7 hardly occurs, and in combination with the use of the adhesive, the temporal change Δθ of the tilt angle θ is almost eliminated. The bonding strength between the hub and the hub 7 is also sufficient by the adhesive.
第３図は本発明による前記倒れ角θの経時変化Δθの
実測データであって、従来例の経時変化Δθの実測デー
タを示す第４図と比較すると、−40℃から＋70℃のヒー
トサイクル10サイクル後の経時変化Δθが従来例で最大
30秒であるのに対し、本発明の構成では、最大10秒と大
きく低減しており、本発明の効果が確認されている。FIG. 3 shows actual measurement data of the temporal change Δθ of the tilt angle θ according to the present invention. Compared with FIG. 4 showing actual measurement data of the temporal change Δθ of the conventional example, the heat cycle 10 from −40 ° C. to + 70 ° C. The change over time after the cycle Δθ is the largest in the conventional example
In contrast to 30 seconds, in the configuration of the present invention, it is greatly reduced to a maximum of 10 seconds, and the effect of the present invention has been confirmed.
（発明の効果） 以上、詳細に説明したように本発明によれば、回転軸
とハブとの圧入時のかじり及びその経時的変化を大きく
低減できるので、多面鏡の理想回転軸に対する倒れとそ
の経時変化が非常に少なく高い光走査精度をもった光偏
向器を構成することができる。(Effects of the Invention) As described above in detail, according to the present invention, the galling at the time of press-fitting of the rotating shaft and the hub and its change with time can be greatly reduced. An optical deflector with very little change over time and high optical scanning accuracy can be configured.
第１図は本発明の一実施例を示す縦断面図、第２図は従
来例の問題点の説明図、第３図は本発明の効果を示す実
測データ、第４図は従来例の実力を示す実測データであ
る。 １…回転軸 2,3…ボールベアリング ４…予圧ばね ５…カラー ６…ケース 6a…突出部 ７…ハブ ８…多面鏡 ９…回転コア 10…メインマグネット 11…FGマグネット 12…コア 13…マグネットワイヤ 14…ポスト 15…ホール素子 16…基板 θ…倒れ角 Ｚ…理想回転軸FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is an explanatory view of a problem of the conventional example, FIG. 3 is measured data showing the effect of the present invention, and FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2, 3 ... Ball bearing 4 ... Preload spring 5 ... Collar 6 ... Case 6a ... Projection 7 ... Hub 8 ... Polyhedral mirror 9 ... Rotating core 10 ... Main magnet 11 ... FG magnet 12 ... Core 13 ... Magnet wire 14 Post 15 Hall element 16 Substrate θ Fall angle Z Ideal rotation axis
Claims (1)
形の多面鏡（８）、黄銅又はアルミ合金よりなるハブ
（７）、カップ状の回転コア（９）、リング状のメイン
マグネット（10）及びFGマグネット（11）をそれぞれ固
着し、更に中央にパイプ状の突出部（6a）を配設したカ
ップ状のケース（６）にメインマグネット（10）及びFG
マグネット（11）と対向して、マグネットワイヤ（13）
を巻回したコア（12）、FGパターン及びホール素子（1
5）を配設した基板（16）及びポスト（14）を固着し、
ケース（６）の突出部（6a）内に第１のボールベアリン
グ（３）、カラー（５）、予圧ばね（４）、第２のボー
ルベアリング（２）を挿入し、前記回転軸（１）を軸支
して構成される光偏向器において、 上記回転軸（１）と上記ハブ（７）との固着を、圧入代
１〜７ミクロンの軽圧入と嫌気性接着剤による接着を併
用して固着したことを特徴とする光偏向器。1. A polygonal polygon mirror (8), a hub (7) made of brass or an aluminum alloy, a cup-shaped rotating core (9), a ring-shaped main magnet (1) on a rotating shaft (1) made of stainless steel. The main magnet (10) and the FG magnet (11) are fixed to the cup-shaped case (6) with the pipe-shaped protrusion (6a) arranged in the center.
Opposite to magnet (11), magnet wire (13)
(12), FG pattern and Hall element (1
Fix the board (16) on which the 5) is placed and the post (14),
The first ball bearing (3), the collar (5), the preload spring (4), and the second ball bearing (2) are inserted into the projection (6a) of the case (6), and the rotating shaft (1) is inserted. In the optical deflector configured to support the shaft, the fixing between the rotating shaft (1) and the hub (7) is performed by using both light press-fitting with a press-fitting allowance of 1 to 7 microns and bonding with an anaerobic adhesive. An optical deflector characterized by being fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25534890A JP2909841B2 (en) | 1990-09-27 | 1990-09-27 | Optical deflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25534890A JP2909841B2 (en) | 1990-09-27 | 1990-09-27 | Optical deflector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04134412A JPH04134412A (en) | 1992-05-08 |
| JP2909841B2 true JP2909841B2 (en) | 1999-06-23 |
Family
ID=17277542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25534890A Expired - Fee Related JP2909841B2 (en) | 1990-09-27 | 1990-09-27 | Optical deflector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2909841B2 (en) |
-
1990
- 1990-09-27 JP JP25534890A patent/JP2909841B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04134412A (en) | 1992-05-08 |
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