JP2529027Y2 - Optical deflector - Google Patents
Optical deflectorInfo
- Publication number
- JP2529027Y2 JP2529027Y2 JP1990014448U JP1444890U JP2529027Y2 JP 2529027 Y2 JP2529027 Y2 JP 2529027Y2 JP 1990014448 U JP1990014448 U JP 1990014448U JP 1444890 U JP1444890 U JP 1444890U JP 2529027 Y2 JP2529027 Y2 JP 2529027Y2
- Authority
- JP
- Japan
- Prior art keywords
- hub
- polygon mirror
- optical deflector
- pressing cap
- rotating polygon
- 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 - Lifetime
Links
Landscapes
- Mechanical Optical Scanning Systems (AREA)
Description
【考案の詳細な説明】 (産業上の利用分野) 本考案はレーザビームプリンタの光走査系等に使用さ
れる回転多面鏡型光偏向器に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a rotary polygon mirror type optical deflector used for an optical scanning system of a laser beam printer.
(従来の技術) 従来例の回転多面鏡型光偏向器は、第3図或は第4図
に示す如く構成されていた。以下その従来例を詳説す
る。(Prior Art) A conventional rotating polygon mirror type optical deflector has been configured as shown in FIG. 3 or FIG. Hereinafter, the conventional example will be described in detail.
上面に電機子コイル群10を配設したプリント基板11は
固定軸ブッシュ13に支持固定される。固定軸ブッシュ13
の中心部には固定軸6が固着されている。The printed circuit board 11 having the armature coil group 10 disposed on the upper surface is supported and fixed to the fixed shaft bush 13. Fixed shaft bush 13
A fixed shaft 6 is fixed to the center of the.
一方固定軸6の外周に設けた軸受手段12により、回転
自在に支承されたハブの下面には、ロータケース8が取
りつけられ、更にこのロータケース8内には電動機駆動
用磁石9が前記電機子コイル群10に対向するように装着
されている。ハブ2の段部上面には、回転多面鏡1を搭
載し、前記回転多面鏡1の上面に配設した弾性体Oリン
グ3を断面ほぼコ字状の押え板4とハブ2の上方延長部
に設けた止め輪5とで押圧することにより、前記回転多
面鏡1をハブ2方向へ押圧し、動かないように固定す
る。On the other hand, a rotor case 8 is mounted on the lower surface of the hub rotatably supported by a bearing means 12 provided on the outer periphery of the fixed shaft 6, and a magnet 9 for driving an electric motor is provided in the rotor case 8 in the armature. It is mounted so as to face the coil group 10. A rotary polygon mirror 1 is mounted on the upper surface of the stepped portion of the hub 2, and an elastic O-ring 3 disposed on the upper surface of the rotary polygon mirror 1 is provided with a holding plate 4 having a substantially U-shaped cross section and an upper extension of the hub 2. The rotating polygon mirror 1 is pressed in the direction of the hub 2 by being pressed with the retaining ring 5 provided at the above, and is fixed so as not to move.
また前記ハブ2の上端開口部にはシール部材7等を貼
着し、電機子コイル群10の通電、駆動用磁石9の励磁に
より、ロータケース8、ハブ2と共に多面鏡1が回転す
る際に軸受手段12より発生するオイルミストが前記開口
部をへて回転多面鏡1の方向へ飛散しないように工夫さ
れている。A seal member 7 or the like is adhered to the upper end opening of the hub 2. When the polygon mirror 1 rotates together with the rotor case 8 and the hub 2 by energizing the armature coil group 10 and exciting the driving magnet 9. The oil mist generated by the bearing means 12 is designed so as not to be scattered toward the rotary polygon mirror 1 through the opening.
また第4図に図示の別の従来例では、上面に電機子コ
イル群10を配線したプリント基板11をハウジング14で固
定し、支持し、ハウジング14の内側に設けた一対の軸受
手段12,12により回転自在に支承された回転軸15にハブ
2を固着する。ハブ2の下面にロータケース8を固着
し、このロータケース8内側面に前記コイル群10に体面
するように駆動用磁石9を設ける。又ハブ2の段部上面
に回転多面鏡1を搭載し、この回転多面鏡1の上面に配
設したOリング3を回転多面鏡押え板4と回転軸15に設
けた止め輪5とにより押圧することにより、回転多面鏡
1をハブ2へ押圧固定する。In another conventional example shown in FIG. 4, a printed circuit board 11 on which an armature coil group 10 is wired is fixed and supported by a housing 14, and a pair of bearing means 12, 12 provided inside the housing 14 is provided. The hub 2 is fixed to the rotating shaft 15 rotatably supported by the above. A rotor case 8 is fixed to the lower surface of the hub 2, and a driving magnet 9 is provided on the inner surface of the rotor case 8 so as to face the coil group 10. The rotating polygon mirror 1 is mounted on the upper surface of the stepped portion of the hub 2, and the O-ring 3 disposed on the upper surface of the rotating polygon mirror 1 is pressed by the rotating polygon mirror holding plate 4 and the retaining ring 5 provided on the rotating shaft 15. By doing so, the rotary polygon mirror 1 is pressed and fixed to the hub 2.
前記の構成においては、一対の軸受手段12,12は前記
ハブ2、ロータケース8、シール部材7等の介在によ
り、回転多面鏡1に対し直接露出しないようになして、
軸受手段12,12から発生するオイルミストを回転多面鏡
1に直接飛散させないように工夫されている。In the above configuration, the pair of bearing means 12, 12 are not directly exposed to the rotary polygon mirror 1 by the interposition of the hub 2, the rotor case 8, the seal member 7, and the like.
The oil mist generated from the bearing means 12, 12 is designed so as not to be scattered directly to the rotary polygon mirror 1.
(考案が解決しようとする課題) しかし前記従来の構成には以下の様な問題点があっ
た。(Problems to be Solved by the Invention) However, the conventional configuration has the following problems.
先ず、第3図に図示の従来例では、ハブの上端開口部
には、オイルミスト封止用としてシールが貼着してあ
る。然し乍ら、前記構成においては軸受から発生するオ
イルミストを完全に封止することは不可能であり、更に
ロータ回動中にシールの貼着が外れたりしてオイルミス
トが外部へ漏洩流出して、回転多面鏡等を汚染するから
光偏向器の性能に悪影響を与えたりしていた。First, in the conventional example shown in FIG. 3, a seal is attached to the upper end opening of the hub for sealing oil mist. However, in the above configuration, it is impossible to completely seal the oil mist generated from the bearing, and furthermore, the oil mist leaks and leaks out due to the sticking of the seal during rotation of the rotor. The contamination of the rotary polygon mirror or the like adversely affects the performance of the optical deflector.
また第4図に図示の従来例では、構成上一対の軸受手
段相互の軸方向の長さを十分長く取ることが不可能であ
るから、作動中、回転軸にズレが生じ易く従って、回転
軸と共に回転多面鏡が回動する際の面倒れが発生し、面
倒れ精度を高く維持するのが困難であった。又一対の軸
受手段相互の軸方向の距離を長くとろうとすると、光偏
向器全体の薄型化が実現できない等の問題点もあった。Further, in the conventional example shown in FIG. 4, it is impossible to make the length of the pair of bearing means axially long enough between the pair of bearing means. At the same time, the tilting of the rotating polygon mirror occurs, and it is difficult to maintain high tilting accuracy. Also, if the axial distance between the pair of bearing means is increased, there is another problem that the thickness of the entire optical deflector cannot be reduced.
(課題を解決するための手段) 本考案は前記問題点を解決することを目的とするもの
である。(Means for Solving the Problems) The present invention aims to solve the above problems.
すなわち回転多面鏡を搭載する電動機ロータのハブの
先端開口位置に環状弾性体を配設し、前記環状弾性体を
ハブの段部と回転多面鏡方向へ押圧する押圧キャップに
より電動機ロータに回転多面鏡を固定せしめると共に前
記ハブの開口部を閉鎖して電動機ロータの軸受手段が回
転多面鏡に対し露出するのを防止することを特徴とする
光偏向器を提供するもので、更に詳説すれば、固定軸の
外周に軸受手段を介して回転自在に配設したハブの段部
に回転多面鏡を搭載し、前記ハブの上方開口位置の外壁
面又は内壁面に環状弾性体を載置し、又ハブの外周に環
状溝を穿設し、前記環状弾性体をおおい、前記ハブ上方
開口部を閉塞する押圧キャップに、前記環状溝に係着可
能な係合片を設けたことを特徴とする光偏向器である。That is, an annular elastic body is disposed at the opening end of the hub of the motor rotor on which the rotating polygon mirror is mounted, and the rotating rotor is attached to the motor rotor by a pressing cap that presses the annular elastic body toward the step of the hub and the rotating polygon mirror. And an optical deflector characterized in that the opening of the hub is closed to prevent the bearing means of the motor rotor from being exposed to the rotary polygon mirror. A rotating polygon mirror is mounted on a stepped portion of a hub rotatably arranged via bearing means on an outer periphery of a shaft, and an annular elastic body is mounted on an outer wall surface or an inner wall surface at an upper opening position of the hub. An annular groove is formed in the outer periphery of the ring, the annular elastic body is covered, and a pressing cap for closing the upper opening of the hub is provided with an engagement piece engageable with the annular groove. It is a vessel.
(作用) 本考案においては、回転多面鏡と共に電動機ロータが
回動して、遠心力等により軸受内にオイルミスト等が発
生しても、ハブと押圧キャップと環状弾性体とで構成さ
れた閉じられた空間内にオイルミストを完全に封止する
ことが可能であるから従来例のように使用中シール部材
が外れたために、オイルミストが外部へ飛散して回転多
面鏡の反射鏡面を汚染する恐れはない。(Operation) In the present invention, even if the motor rotor rotates together with the rotating polygon mirror and oil mist or the like is generated in the bearing due to centrifugal force or the like, the closing constituted by the hub, the pressing cap, and the annular elastic body. Since the oil mist can be completely sealed in the defined space, the seal member is detached during use as in the conventional example, so that the oil mist scatters outside and contaminates the reflecting mirror surface of the rotating polygon mirror. There is no fear.
(実施例) 本考案の実施例を以下第1図及び第2図を参照して詳
説する。(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIG. 1 and FIG.
鉄ベースのプリント基板11の上面には電機子コイル群
10を配設する。このプリント基板11の中央部には固定軸
ブッシュ13が固着される。軸ブッシュ13には固定軸6が
固着されている。固定軸6の外周にはハブ2と共に回転
自在の、軸受手段である一対のボールベアリング12,12
を設け、ハブ2の下面にはロータケース8が固着され、
このロータケース8内側には電動機駆動用磁石9が接着
固定されている。また前記ハブ2の上方外側面には、断
面コの字形の環状溝16が切削等により設けられる。さら
にハブ2の上端外側、つまり上記環状溝16の上部にはO
リング3を係止するための環状の段部を形成してある。
この段部は第2図(A)で示すように外壁面に形成した
段部2aと、第2図(B)で示すように内壁面に形成した
段部2bであり、いずれもOリング3を押圧キャップ4と
の間に確実に係止する作用をなす。一方断面凸状で、頭
部p、胴部b,湾曲端部gを具えた水平脚部fよりなる押
圧キャップ4の内側面には、前記ハブ2の上方外側面に
設けたコの字形環状溝16に係合可能にして抜け止めの役
割を果すための複数の係合部例えば切り曲げ突き出し部
17を設ける。ハブ2の段部sに回転多面鏡1を搭載した
後、ハブ2の開口部K先端の外壁面に形成した環状の段
部2a或いは内壁面に形成した環状の段部2bに環状弾性体
であるOリング3を形成し(第2図(A)及び同(B)
参照)、更に前記押圧キャップ4を押し下げて前記ハブ
開口部kにかぶせると、前記押圧キャップ4の切り曲げ
突き出し部17はハブ2の上方外側面に設けた断面コ字形
環状溝16に挿入係着される。同時に押圧キャップ4の水
平脚部fの湾曲部gで回転多面鏡1をハブ2の段部s方
向へ押圧し、水平脚部fと前記段部sの間で回転多面鏡
1を挾持固定する構成である。Armature coil group on the upper surface of the iron-based printed circuit board 11
Arrange 10 A fixed shaft bush 13 is fixed to the center of the printed board 11. The fixed shaft 6 is fixed to the shaft bush 13. A pair of ball bearings 12, 12 serving as bearing means, which are rotatable with the hub 2, are provided on the outer periphery of the fixed shaft 6.
And a rotor case 8 is fixed to the lower surface of the hub 2,
A motor driving magnet 9 is adhesively fixed inside the rotor case 8. An annular groove 16 having a U-shaped cross section is provided on the upper outer surface of the hub 2 by cutting or the like. Further, the outer side of the upper end of the hub 2, that is, the upper part of the annular groove 16 is O
An annular step for locking the ring 3 is formed.
These steps are a step 2a formed on the outer wall surface as shown in FIG. 2 (A) and a step 2b formed on the inner wall surface as shown in FIG. 2 (B). And the pressing cap 4 is securely locked. On the other hand, on the inner surface of the pressing cap 4 having a convex cross section and a horizontal leg f having a head p, a body b, and a curved end g, a U-shaped ring provided on the upper outer surface of the hub 2 is provided. A plurality of engaging portions, for example, cut-bend protrusions, which can be engaged with the groove 16 and serve as a stopper
17 will be provided. After the rotary polygon mirror 1 is mounted on the step s of the hub 2, an annular step 2 a formed on the outer wall surface at the end of the opening K of the hub 2 or an annular step 2 b formed on the inner wall is formed of an annular elastic body. An O-ring 3 is formed (FIGS. 2A and 2B).
Further, when the pressing cap 4 is further pushed down to cover the hub opening k, the cut-out bent projection 17 of the pressing cap 4 is inserted into and engaged with the U-shaped annular groove 16 provided on the upper outer surface of the hub 2. Is done. Simultaneously, the rotating polygon mirror 1 is pressed in the direction of the step s of the hub 2 by the curved portion g of the horizontal leg f of the pressing cap 4, and the rotating polygon mirror 1 is clamped and fixed between the horizontal leg f and the step s. Configuration.
この場合押圧キャプ4に設けた係合部である切り曲げ
突き出し部17及び断面コ字状環状溝16はそれぞれ数個所
設けるのがよい。これらの部材16,17は水平脚部fより
の高さ(距離)が同一であるように胴部bの内側又はハ
ブ2の上方外側面に設けるのを最適とする。In this case, it is preferable to provide several cut-out projections 17 and annular grooves 16 each having a U-shaped cross section, which are engaging portions provided on the pressing cap 4. These members 16 and 17 are optimally provided on the inner side of the body b or the upper outer side of the hub 2 so that the height (distance) from the horizontal leg f is the same.
(考案の効果) 以上詳細に説明した様に、本考案によれば、以下の様
な効果が期待できる。(Effects of the Invention) As described in detail above, according to the present invention, the following effects can be expected.
(1) 光偏向器の作動中、軸受から発生するオイルミ
ストを完全に封止できることにより、極めて信頼性の高
い光偏向器を得ることができる。(1) Since the oil mist generated from the bearing can be completely sealed during the operation of the optical deflector, an extremely reliable optical deflector can be obtained.
(2) 軸受相互の距離を所望の長さとする構成が可能
となり、光偏向器の薄型化及び高精度化を両立すること
ができる。(2) A configuration in which the distance between the bearings is set to a desired length becomes possible, and it is possible to achieve both thinning and high precision of the optical deflector.
(3) 環状弾性体であるOリングと押圧キャップを採
用することにより回転多面鏡をハブに固定する機能とオ
イルミストをシールする機能の両方を達成させたので、
極めて安価にして信頼性の高い光偏向器が実現できる。(3) Both the function of fixing the rotary polygon mirror to the hub and the function of sealing the oil mist are achieved by adopting the O-ring and the pressing cap, which are annular elastic bodies.
An extremely inexpensive and highly reliable optical deflector can be realized.
(4) 切り曲げ突き出し部を押圧キャップ水平脚部よ
り等距離にある胴部の所定位置に設け、これをハブ上端
外周に設けた環状溝に係着した構成であるから、押圧キ
ャップは抜け落ちないようにハブに装着される。従って
従来例のようにシール用部材が外れる等の不具合の発生
を防止できる。(4) Since the cut-and-bend protrusion is provided at a predetermined position of the body at an equal distance from the horizontal portion of the pressing cap and is engaged with an annular groove provided on the outer periphery of the upper end of the hub, the pressing cap does not fall off. Attached to the hub. Therefore, it is possible to prevent the occurrence of problems such as the detachment of the sealing member as in the conventional example.
第1図は本考案の一実施例を示す光偏向器の断面図。 第2図(A)は第1図の一部拡大断面図。第2図(B)
は第2図(A)に相当する別の実施例を示す拡大断面
図。 第3図と第4図はそれぞれ従来例の光偏向器の断面図。 b……押圧キャップ胴部、f……押圧キャップ水平脚
部、p……押圧キャップ頭部、s……ハブ段部、1……
回転多面鏡、2……ハブ、3……環状弾性体、4……押
圧キャップ、6……固定軸、8……ロータケース、16…
…環状溝、17……切り曲げ突き出し部。FIG. 1 is a sectional view of an optical deflector showing an embodiment of the present invention. FIG. 2A is a partially enlarged sectional view of FIG. Fig. 2 (B)
3 is an enlarged sectional view showing another embodiment corresponding to FIG. 3 and 4 are sectional views of a conventional optical deflector. b: press cap body, f: press cap horizontal leg, p: press cap head, s: hub step, 1 ...
Rotating polygon mirror, 2 ... hub, 3 ... annular elastic body, 4 ... pressing cap, 6 ... fixed shaft, 8 ... rotor case, 16 ...
… Circular groove, 17… Cut and bend projection.
Claims (3)
ロータに回転多面鏡を搭載した電動機において、 ロータのハブの上方開口部の先端外壁面あるいは内壁面
に形成した段部に環状弾性体を配設し、前記ハブ開口部
を閉鎖する押圧キャップの内側に突出部を形成し、この
突出部をハブ上方外側面に穿設した環状溝に係脱自在と
なし、電動機ロータの軸受手段が回転多面鏡に対して露
出するのを防止することを特徴とする光偏向器。1. An electric motor in which a rotating polygon mirror is mounted on a rotor which is rotatably provided by a bearing means on a fixed shaft, wherein a stepped portion formed on an outer wall surface or an inner wall surface at a tip end of an upper opening of a hub of the rotor has an annular elastic body. A projection is formed inside the pressing cap that closes the hub opening, and the projection is made detachable with an annular groove formed in the upper outer surface of the hub. An optical deflector for preventing exposure to a rotating polygon mirror.
する断面凸条の押圧キャップの内側面に、ハブ上方開口
部外側に穿設した環状溝に係脱自在の突出部を設けた請
求項1記載の光偏向器。2. An inner groove of a pressing cap having a ridge in cross section having a head, a torso, and a horizontal leg having a curved portion. The optical deflector according to claim 1, further comprising:
とをそれぞれ押圧キャップの水平脚より等距離の位置に
配設した請求項1記載の光偏向器。3. The optical deflector according to claim 1, wherein the plurality of cut-out bent projections and the U-shaped cross-sectional annular groove are respectively arranged at positions equidistant from the horizontal leg of the pressing cap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990014448U JP2529027Y2 (en) | 1990-02-16 | 1990-02-16 | Optical deflector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990014448U JP2529027Y2 (en) | 1990-02-16 | 1990-02-16 | Optical deflector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03105818U JPH03105818U (en) | 1991-11-01 |
JP2529027Y2 true JP2529027Y2 (en) | 1997-03-12 |
Family
ID=31517814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990014448U Expired - Lifetime JP2529027Y2 (en) | 1990-02-16 | 1990-02-16 | Optical deflector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2529027Y2 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0725775U (en) * | 1993-10-25 | 1995-05-16 | 秀雄 半田 | Linear fishing line weight |
-
1990
- 1990-02-16 JP JP1990014448U patent/JP2529027Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03105818U (en) | 1991-11-01 |
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