JPS62134613A - Grating holding mechanism - Google Patents
Grating holding mechanismInfo
- Publication number
- JPS62134613A JPS62134613A JP27431685A JP27431685A JPS62134613A JP S62134613 A JPS62134613 A JP S62134613A JP 27431685 A JP27431685 A JP 27431685A JP 27431685 A JP27431685 A JP 27431685A JP S62134613 A JPS62134613 A JP S62134613A
- Authority
- JP
- Japan
- Prior art keywords
- holding member
- grating
- press
- aperture
- holding
- 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
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、例えばコンパクトディスク、ビデオディス
ク等の光ディスクや光磁気ディスク等の光学式記録媒体
に対して情報の記録や再生を行うための光ヘッドに装着
されるグレーティングの保持機構に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an optical system for recording and reproducing information on and from optical recording media such as optical discs such as compact discs and video discs, and optical recording media such as magneto-optical discs. The present invention relates to a holding mechanism for a grating attached to a head.
従来の光ヘッドとして、例えばトラッキングエラーを検
出するために、半導体レーザ等の光源からの光束をグレ
ーティングによって複数の光束に分離するようにしたも
のがある。このような光ヘッドにおいては、分離した光
束を光ディスクにそのトラ・ツクに対して所定の位置関
係で投射するようにするため、第6図に示すように、グ
レーティング1を装着した保持部材2を固定部材3内に
遊嵌し、コイルばね4によってその弾性力が作用する矢
印方向を軸として固定部材3内に回動自在に押圧保持し
て、固定部材3の側面に形成した開口3aを介して調整
治具により保持部材2を回動させることにより、グレー
ティング1によって分離される光束の方向を調整するよ
うにしている。Some conventional optical heads are designed to separate a light beam from a light source such as a semiconductor laser into a plurality of light beams using a grating, for example, in order to detect tracking errors. In such an optical head, in order to project the separated light beam onto the optical disk in a predetermined positional relationship with respect to its track, a holding member 2 with a grating 1 attached thereto is used as shown in FIG. It is loosely fitted into the fixing member 3 and is pressed and held rotatably within the fixing member 3 about the direction of the arrow on which its elastic force is applied by the coil spring 4. By rotating the holding member 2 using an adjustment jig, the direction of the light beam separated by the grating 1 is adjusted.
しかしながら、上述した従来の構成にあっては、保持部
材2を固定部材3内に遊嵌するようにしているため、調
整にあたって保持部材2を回’2J+させることによっ
てコイルばね4に蓄えられる逆方向の回動応力は、保持
部材2の一端面と固定部材3との圧接部分5の摩擦力に
よってのみ抑えることになる。これがため、その摩擦力
が小さいと調整後保持部材2に逆方向の回動力が加わっ
て保持部材2が回動してしまい調整に手間がかかると共
に精度の高い調整が困難であるという問題がある。However, in the conventional configuration described above, since the holding member 2 is loosely fitted into the fixing member 3, by turning the holding member 2 2J+ times during adjustment, the opposite direction is stored in the coil spring 4. The rotational stress is suppressed only by the frictional force of the pressure contact portion 5 between one end surface of the holding member 2 and the fixed member 3. Therefore, if the frictional force is small, a rotational force in the opposite direction is applied to the holding member 2 after adjustment, causing the holding member 2 to rotate, resulting in a problem that adjustment is time-consuming and difficult to achieve highly accurate adjustment. .
また、この問題を解決するため、コイルばね4による押
圧力を増大させると保持部材2の回動調整が困難になる
という問題が生じる。Furthermore, if the pressing force of the coil spring 4 is increased in order to solve this problem, a problem arises in that it becomes difficult to adjust the rotation of the holding member 2.
この発明は、このような従来の問題点に着目してなされ
たもので、グレーティングを容易に、かつ精度良く回動
調整し得るよう適切に構成したグレーティング保持機構
を提供することを目的とする。The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a grating holding mechanism that is appropriately configured so that the rotation of the grating can be adjusted easily and accurately.
C問題点を解決するための手段および作用〕上記目的を
達成するため、この発明では、グレーティングを弾性変
形可能な保持部材に装着して、これを固定部材内に圧入
すると共に弾性部材により固定部材内に回動自在に押圧
保持し、これにより弾性部材の弾性力を大きくすること
なく保持部材と固定部材との圧接面積を大きくして摩擦
力を増大させ、弾性部材による保持部材の不所望な回動
を阻止する。Means and operation for solving problem C] In order to achieve the above object, in this invention, the grating is attached to an elastically deformable holding member, and this is press-fitted into the fixing member, and the elastic member is used to tighten the fixing member. This increases the pressure contact area between the holding member and the fixed member without increasing the elastic force of the elastic member, thereby increasing the frictional force, thereby preventing undesired movement of the holding member by the elastic member. Prevent rotation.
第1図および第2図はこの発明の一実施例を示す分解斜
視図および断面図である。この実施例では、グレーティ
ング11を弾性変形可能なプラスチック、例えばポリカ
ーボネートより成る保持部材12に装着し、これを例え
ばAffより成る固定部材13の開口13aに圧入する
。このため、保持部材12はその外径を開口13aの径
よりも若干大きくする。1 and 2 are an exploded perspective view and a sectional view showing one embodiment of the present invention. In this embodiment, the grating 11 is attached to a holding member 12 made of elastically deformable plastic, such as polycarbonate, and this is press-fitted into an opening 13a of a fixing member 13 made of, for example, Aff. For this reason, the outer diameter of the holding member 12 is made slightly larger than the diameter of the opening 13a.
この保持部材12には、その中央部にグレーティング1
1に光を導くための開口12aを形成すると共に、外周
面に回動調整用の切欠き12bを形成する。This holding member 12 has a grating 1 at its center.
1 is formed with an opening 12a for guiding light, and a notch 12b for rotation adjustment is formed on the outer peripheral surface.
保持部材12が圧入される固定部材13の先端部には開
口13aに連通し、その径よりも小さい径の開口13b
を形成し、該先端部においてグレーティング11の格子
面が矢印で示す回動軸に対し直交するように保持部材1
2をその一側面の周縁部と外周面とを固定部材13に接
触させて配置する。また、固定部材13の後端部、すな
わち保持部材12を圧入する入口側には、半導体レーザ
14を複数本のねじ15により押え板16を介して固着
し、この半導体レーザ14と保持部材12との間の開口
13a内にコイルばね17を介在させて、これにより保
持部材12を先端部に押圧する。したがって、保持部材
12は、固定部材13の先端部に接する側面の周縁部が
コイルばね17によって該先端部に押圧され、外周面は
圧入により開口13aの内面を押圧することになる。The distal end of the fixing member 13 into which the holding member 12 is press-fitted has an opening 13b that communicates with the opening 13a and has a smaller diameter than the opening 13a.
The holding member 1 is formed such that the grating surface of the grating 11 is perpendicular to the rotation axis indicated by the arrow at the tip.
2 is placed so that the peripheral edge of one side and the outer peripheral surface thereof are in contact with the fixing member 13. Further, the semiconductor laser 14 is fixed to the rear end of the fixing member 13, that is, the entrance side into which the holding member 12 is press-fitted, with a plurality of screws 15 via a holding plate 16, and the semiconductor laser 14 and the holding member 12 are connected to each other. A coil spring 17 is interposed in the opening 13a between the two, thereby pressing the holding member 12 toward the tip. Therefore, the peripheral edge of the side surface of the holding member 12 that contacts the tip of the fixing member 13 is pressed against the tip by the coil spring 17, and the outer circumferential surface presses against the inner surface of the opening 13a by press fitting.
この実施例では、固定部材13の先端部外周面に開口1
3aに連通ずる開口13cを形成して、この間口13c
に偏心軸18aを有する調整冶具18を挿入し、その偏
心軸18aを保持部材12の切欠き12bに係合して調
整冶具18を回動させることにより、保持部材12を固
定部材13に対して矢印で示す回動軸を中心に回動させ
てグレーティング11によって分離される光束の方向を
調整する。In this embodiment, an opening 1 is provided on the outer peripheral surface of the distal end of the fixing member 13.
An opening 13c communicating with 3a is formed, and this frontage 13c
By inserting the adjustment jig 18 having an eccentric shaft 18a into the holder, and rotating the adjustment jig 18 by engaging the eccentric shaft 18a with the notch 12b of the holding member 12, the holding member 12 is moved relative to the fixed member 13. The direction of the light beam separated by the grating 11 is adjusted by rotating the grating 11 about a rotation axis indicated by an arrow.
かかる構成によれば、保持部材12の回動により、コイ
ルばね17に保持部材12を逆方向に回動させる応力が
蓄えられても、保持部材12は圧入によりその外周面が
開口13aの内面に対して押圧されていると共に、−側
面の周縁部がコイルばね17により固定部材13の先端
部に押圧されているので、それらの摩擦力により逆方向
に回動することはない。According to this configuration, even if stress is accumulated in the coil spring 17 to rotate the holding member 12 in the opposite direction due to the rotation of the holding member 12, the outer peripheral surface of the holding member 12 is press-fitted to the inner surface of the opening 13a. Since the peripheral edge of the negative side is pressed against the tip of the fixing member 13 by the coil spring 17, it will not rotate in the opposite direction due to their frictional force.
したがって、グレーティング11を固定部材13に対し
て容易かつ高精度で回動調整することができる。Therefore, the rotation of the grating 11 relative to the fixed member 13 can be easily and precisely adjusted.
第3図A、 B、第4図A、 Bおよび第5図A。Figure 3 A, B, Figure 4 A, B and Figure 5 A.
Bはそれぞれ保持部材の変形例を示す正面図および断面
図である。第3図に示す保持部材21は、その一部に空
隙21aを形成すると共に、その空隙21aの外周部を
突状にして、この突状部21bにおいて弾性変形させる
ようにしたものである。また、第4図に示す保持部材3
1は、その外周面に複数の突起31aを形成し、これら
突起31aにおいて弾性変形させるようにしたものであ
る。更に、第5図に示す保持部材41は、その外周面に
複数の突片41aを形成し、これら突片41aにおいて
弾性変形させるようにしたものである。B is a front view and a sectional view showing a modification of the holding member, respectively. The holding member 21 shown in FIG. 3 has a gap 21a formed in a part thereof, and the outer periphery of the gap 21a is made into a protrusion, so that the protrusion 21b is elastically deformed. In addition, the holding member 3 shown in FIG.
No. 1 has a plurality of protrusions 31a formed on its outer peripheral surface, and these protrusions 31a are elastically deformed. Further, the holding member 41 shown in FIG. 5 has a plurality of protrusions 41a formed on its outer peripheral surface, and these protrusions 41a are elastically deformable.
なお、第3図〜第5図において第1図および第2図に示
す符号と同一符号は同一作用を成すものを表わす。In FIGS. 3 to 5, the same reference numerals as those shown in FIGS. 1 and 2 represent components having the same function.
第3図〜第5図に示す変形例においては、保持部材21
3141が第1図および第2図に示す固定部材13の開
口13aの内周面において部分的に弾性変形して圧入さ
せることになるので、保持部材21゜31、41の開口
13aに対する寸法のばらつきを有効に吸収することが
できると共に、調整冶具18における回転力量を小さく
てきる利点がある。In the modification shown in FIGS. 3 to 5, the holding member 21
3141 is press-fitted by being partially elastically deformed on the inner circumferential surface of the opening 13a of the fixing member 13 shown in FIGS. This has the advantage of being able to effectively absorb the amount of force and reducing the amount of rotational force in the adjustment jig 18.
なお、固定部材内への保持部材の圧入を容易に行い得る
ようにするため、保持部材の圧入先端縁および/または
固定部材の圧入側端縁に面取りを施してもよい。またコ
イルばね17の代わりに円筒状のゴム部材を用いること
もできる。Note that in order to facilitate the press-fitting of the holding member into the fixing member, the press-fitting end edge of the holding member and/or the press-fitting side edge of the fixing member may be chamfered. Moreover, a cylindrical rubber member can also be used instead of the coil spring 17.
以上述べたように、この発明によればグレーティングを
弾性変形可能な保持部材に装着し、これを固定部材内に
圧入して弾性部材により固定部材内に回動自在に押圧保
持するようにしたので、保持部材と固定部材との間の摩
擦力を増大させることができ、これにより保持部材の回
動によって弾性部材に保持部材を逆方向に回動させる応
力が蓄えられても、それによる保持部材の不所望な回動
を有効に阻止することができる。したがってグレーティ
ングを容易かつ高精度で回動調整することができる。As described above, according to the present invention, the grating is attached to an elastically deformable holding member, and this is press-fitted into the fixed member, and the elastic member presses and holds the grating in a rotatable manner within the fixed member. , it is possible to increase the frictional force between the holding member and the fixed member, so that even if the rotation of the holding member causes stress to be accumulated in the elastic member that causes the holding member to rotate in the opposite direction, the holding member due to the rotation of the holding member It is possible to effectively prevent undesired rotation. Therefore, the rotation of the grating can be adjusted easily and with high precision.
第1図および第2図はこの発明の一実施例を示す分解斜
視図および断面図、
第3図A、 B、第4図A、 Bおよび第5図A。
Bはそれぞれ保持部材の変形例を示す正面図および断面
図、
第6図は従来の技術を示す図である。
11・・・グレーティング 12・・・保持部材13
・・・固定部材 14・・・半導体レーザ15
・・・ねじ 16・・・押え手反17・・
・コイルばね 18・・・調整治具21.31.
41・・・保持部材
l〜 j3
第・′4図
、へ B
第51・4
A I家手 続 補
正 書
昭和61年1月22日
特許庁長官 宇 賀 道 部 殿1、
事件の表示
昭和60年枠許願第274318号
2、発明の名称
グレーティング保持機構
3、 )11f正をする者
事件との関係 特許出願人
(037)オリンパス光学工業株式会社4、代理人
6、7+ff正の内容 (別紙の通り)図面中温1図お
よび第2図を別紙のとおり訂正する。1 and 2 are an exploded perspective view and a sectional view showing one embodiment of the present invention; FIGS. 3A and 3B; FIGS. 4A and B; and FIG. 5A. B is a front view and a sectional view showing modified examples of the holding member, respectively, and FIG. 6 is a diagram showing a conventional technique. 11... Grating 12... Holding member 13
...Fixing member 14...Semiconductor laser 15
...screw 16...presser hand 17...
・Coil spring 18...adjustment jig 21.31.
41...Holding member l~j3 Figure 4, Go to B 51.4 AI Family Procedures Amendment January 22, 1986 Director General of the Patent Office Uga Michibe 1,
Display of the case 1985 Frame Application No. 274318 2, Name of the invention Grating Holding Mechanism 3, ) 11f Correction Relationship to the case Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent 6, 7 + ff Correction Contents (as shown in the attached sheet) The drawings Medium Temperature Figure 1 and Figure 2 are corrected as shown in the attached sheet.
Claims (1)
、この保持部材を固定部材内に圧入すると共に、弾性部
材によりその弾性力が作用する方向を軸として前記固定
部材内に回動自在に押圧保持して成るグレーティング保
持機構。1. Attach the grating to an elastically deformable holding member, press fit this holding member into the fixed member, and press and hold the grating so that it can rotate freely within the fixed member around the direction in which the elastic force is applied by the elastic member. A grating holding mechanism consisting of
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27431685A JPS62134613A (en) | 1985-12-07 | 1985-12-07 | Grating holding mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27431685A JPS62134613A (en) | 1985-12-07 | 1985-12-07 | Grating holding mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62134613A true JPS62134613A (en) | 1987-06-17 |
Family
ID=17539950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27431685A Pending JPS62134613A (en) | 1985-12-07 | 1985-12-07 | Grating holding mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62134613A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005091768A (en) * | 2003-09-17 | 2005-04-07 | Hoya Candeo Optronics株式会社 | Holding structure of optical element |
JP2006130531A (en) * | 2004-11-05 | 2006-05-25 | Asahi Sunac Corp | Apparatus for transferring wire rod |
JP2009522105A (en) * | 2005-12-29 | 2009-06-11 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method and apparatus for manufacturing a curved spring member |
EP3260896A4 (en) * | 2015-02-18 | 2018-11-07 | Nittoh Inc. | Circumferential angle adjustment device for bus bar in cylindrical lens, and lens barrel equipped with circumferential angle adjustment device for bus bar in cylindrical lens |
-
1985
- 1985-12-07 JP JP27431685A patent/JPS62134613A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005091768A (en) * | 2003-09-17 | 2005-04-07 | Hoya Candeo Optronics株式会社 | Holding structure of optical element |
JP4672248B2 (en) * | 2003-09-17 | 2011-04-20 | Hoya Candeo Optronics株式会社 | Optical element holding structure |
JP2006130531A (en) * | 2004-11-05 | 2006-05-25 | Asahi Sunac Corp | Apparatus for transferring wire rod |
JP2009522105A (en) * | 2005-12-29 | 2009-06-11 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method and apparatus for manufacturing a curved spring member |
JP4903222B2 (en) * | 2005-12-29 | 2012-03-28 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method and apparatus for manufacturing a curved spring member |
US8333093B2 (en) | 2005-12-29 | 2012-12-18 | Robert Bosch Gmbh | Method and device for producing bent spring elements |
EP3260896A4 (en) * | 2015-02-18 | 2018-11-07 | Nittoh Inc. | Circumferential angle adjustment device for bus bar in cylindrical lens, and lens barrel equipped with circumferential angle adjustment device for bus bar in cylindrical lens |
US10481362B2 (en) | 2015-02-18 | 2019-11-19 | Nittoh Inc. | Circumferential angle adjustment device for generatrix of cylindrical lens, and lens barrel equipped with circumferential angle adjustment device for generatrix of cylindrical lens |
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