JP2792099B2 - Objective lens actuator - Google Patents
Objective lens actuatorInfo
- Publication number
- JP2792099B2 JP2792099B2 JP1108813A JP10881389A JP2792099B2 JP 2792099 B2 JP2792099 B2 JP 2792099B2 JP 1108813 A JP1108813 A JP 1108813A JP 10881389 A JP10881389 A JP 10881389A JP 2792099 B2 JP2792099 B2 JP 2792099B2
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- elastic member
- base
- lens holding
- metal plate
- 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
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はコンピューター等の外部記憶装置として使用
される光学的記録再生装置，あるいはオーディオ用の光
学再生装置に使用される光学ピックアップを構成する対
物レンズアクチュエータに関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an objective lens actuator constituting an optical recording / reproducing device used as an external storage device of a computer or the like or an optical pickup used for an optical reproducing device for audio. It is about.
従来の技術 従来の技術を第３図〜第４図により説明する。第３図
は対物レンズアクチュエータの斜視図であり、第４図は
同分解斜視図である。2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 3 is a perspective view of the objective lens actuator, and FIG. 4 is an exploded perspective view of the same.
第３図〜第４図によると、４は対物レンズ５、バラン
ス材10、軸受７、フォーカスコイル２、トラッキングコ
イル３を装着した対物レンズ保持材４であり、ベース１
に圧入された支軸９に回転可能に、且つ、上下動可能に
挿入装着され、シリコンゴム製の弾性部材６を介して上
記ベース１に保持されている。なお、この保持はピン11
によってベース１と対物レンズ保持材４を弾性部材６に
固定することで行なわれる。８は永久磁石であり、支軸
９を中心に対称に上記ベース１上に固着され、この永久
磁石８とベース１とで構成される磁気回路と、上記フォ
ーカスコイル２とトラッキングコイル３に通電すること
によって、対物レンズ保持材４を支軸９の軸方向および
回転方向に微少に移動させるものである。この移動によ
って、ベース１の下部より上方に照射されている半導体
レーザ（図示せず）のレーザ光を対物レンズ保持材４に
装着された対物レンズ５によって、この対物レンズ５の
上部に配置した記録媒体（図示せず）上に常に集束させ
るものである。According to FIGS. 3 and 4, reference numeral 4 denotes an objective lens holding member 4 on which an objective lens 5, a balance member 10, a bearing 7, a focus coil 2, and a tracking coil 3 are mounted.
It is rotatably and vertically movably inserted into and mounted on a support shaft 9 press-fitted into the base 1, and is held by the base 1 via an elastic member 6 made of silicone rubber. In addition, this holding
This is performed by fixing the base 1 and the objective lens holding member 4 to the elastic member 6. Reference numeral 8 denotes a permanent magnet, which is fixed on the base 1 symmetrically with respect to a support shaft 9, and energizes a magnetic circuit composed of the permanent magnet 8 and the base 1, the focus coil 2 and the tracking coil 3. Thus, the objective lens holding member 4 is slightly moved in the axial direction and the rotation direction of the support shaft 9. Due to this movement, the laser light of the semiconductor laser (not shown) irradiated above the lower part of the base 1 is recorded by the objective lens 5 mounted on the objective lens holding member 4 on the upper part of the objective lens 5. It is always focused on a medium (not shown).
発明が解決しようとする課題 上記のように対物レンズアクチュエータは構成し、対
物レンズ保持材４をベース１に弾性部材６を介して保持
しているので、ピン11で固定する時のバラツキによっ
て、装着誤差が大きくなり、対物レンズ５の中心位置が
大きくずれて、対物レンズアクチュエータの組立歩留り
を非常に低いものとしていた。Problems to be Solved by the Invention As described above, the objective lens actuator is configured, and the objective lens holding member 4 is held on the base 1 via the elastic member 6. The error increases, and the center position of the objective lens 5 shifts greatly, resulting in a very low assembly yield of the objective lens actuator.
課題を解決するための手段 上記課題を解決するために本発明は金属板に、この金
属板の中央孔を中心として対称になるように弾性部材を
一体成形した一体弾性部材でベースと対物レンズ保持部
材を接続する構成としたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention holds a base and an objective lens with an integral elastic member in which an elastic member is integrally formed on a metal plate so as to be symmetric with respect to a center hole of the metal plate. It is configured to connect members.
作用 上記のように金属板に、金属板の中央孔に対称になる
ように弾性部材を一体成形したので、組立上の誤差を発
生させる箇所を減少させ、累積誤差を小さくし、対物レ
ンズの中心位置精度を確保するものである。Function As described above, since the elastic member is integrally formed on the metal plate so as to be symmetric with respect to the center hole of the metal plate, a portion where an assembly error occurs is reduced, a cumulative error is reduced, and the center of the objective lens is reduced. This is to ensure position accuracy.
実施例 本発明の対物レンズアクチュエータの一実施例を第１
図〜第２図a,bにより説明する。第１図は分解斜視図で
あり、第２図ａは要部である一体弾性部材の平面図であ
り、第２図ｂは同側断面図である。なお、説明にあたっ
ては従来例と同一部分には同一番号を付与し説明は省略
する。第１図，第２図a,bによると、12は黄銅製の金属
板13とベース１に固着するこの金属板13の中央孔16を中
心にして、対称の位置に設けられたシリコンゴムからな
る弾性部材14と、この弾性部材14に設けられ、ベース１
にこの弾性部材14を装着する黄銅製の挿入ピン15を一体
に形成した一体弾性部材である。またこの一体弾性部材
12の対物レンズ保持材４への装着は、上記金属板13の中
央孔16を対物レンズ保持材の突起17に挿入し、接着材に
て固定するものである。Embodiment An embodiment of the objective lens actuator according to the present invention will be described as a first embodiment.
This will be described with reference to FIGS. 1 is an exploded perspective view, FIG. 2a is a plan view of an integral elastic member which is a main part, and FIG. 2b is a sectional side view of the same. In the description, the same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. According to FIGS. 1 and 2a and 2b, reference numeral 12 designates a metal plate 13 made of brass and a silicone rubber provided at a symmetrical position with respect to a central hole 16 of the metal plate 13 fixed to the base 1. Elastic member 14 and a base 1 provided on the elastic member 14.
It is an integral elastic member integrally formed with a brass insertion pin 15 to which the elastic member 14 is attached. Also, this integral elastic member
The attachment of the twelve to the objective lens holding member 4 involves inserting the central hole 16 of the metal plate 13 into the projection 17 of the objective lens holding member and fixing it with an adhesive.
なお、金属板13は従来技術のバランス材10としての役
割も有するものである。Note that the metal plate 13 also has a role as the balance material 10 of the related art.
発明の効果 本発明は以上のように金属板に弾性部材と挿入ピンを
一体に形成した一体弾性部材を用いたので、これらの位
置関係は弾性部材を形成するシリコンゴムの成形金型の
精度によって位置精度が決定されるため、従来の組合せ
によって発生した組合せ誤差をともなう対物レンズの位
置精度に比較して位置精度の向上の図れるものである。Effect of the Invention As described above, the present invention uses an integral elastic member in which an elastic member and an insertion pin are integrally formed on a metal plate, so that the positional relationship between them depends on the precision of a silicone rubber molding die forming the elastic member. Since the position accuracy is determined, the position accuracy can be improved as compared with the position accuracy of the objective lens having a combination error generated by the conventional combination.
第１図は本発明の対物レンズアクチュエータの分解斜視
図、第２図ａは第１図の要部である一体弾性部材の平面
図、第２図ｂは同側断面図、第３図は従来の対物レンズ
アクチュエータの斜視図、第４図は同分解斜視図であ
る。 １……ベース、２……フォーカスコイル、３……トラッ
キングコイル、４……対物レンズ保持材、５……対物レ
ンズ、８……永久磁石、９……支軸、12……一体弾性部
材、14……弾性部材。1 is an exploded perspective view of the objective lens actuator of the present invention, FIG. 2a is a plan view of an integral elastic member which is a main part of FIG. 1, FIG. 2b is a sectional side view of the same, and FIG. FIG. 4 is a perspective view of the objective lens actuator of FIG. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Focus coil, 3 ... Tracking coil, 4 ... Objective lens holding material, 5 ... Objective lens, 8 ... Permanent magnet, 9 ... Support shaft, 12 ... Integrated elastic member, 14 ... Elastic member.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−236149（ＪＰ，Ａ) 実開 昭60−186519（ＪＰ，Ｕ) 実開 昭62−83224（ＪＰ，Ｕ) 実開 昭63−22614（ＪＰ，Ｕ) 実開 昭62−67319（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G11B 7/09──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-236149 (JP, A) JP-A-60-186519 (JP, U) JP-A-62-83224 (JP, U) JP-A-63-83224 22614 (JP, U) Japanese Utility Model Showa 62-67319 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) G11B 7/09
Claims (1)
とトラッキングコイルを装着した対物レンズ保持材と、
この対物レンズ保持材を回転、および上下動可能なよう
に支持してなるベースに設けられた支軸と、上記ベース
に装着された永久磁石と、上記対物レンズ保持材に装着
され、上記ベースに固着される一体弾性部材とを備え、
上記一体弾性部材は上記対物レンズ保持部材に設けられ
た突起と係合する中央孔を有する金属板と、上記中央孔
を中心として対称になるように上記金属板の外周部に設
けられたシリコンゴムからなる弾性部材と、上記弾性部
材に固定され上記ベースに固着される挿入ピンとが一体
に形成された構成であることを特徴とする対物レンズア
クチュエータ。An objective lens holding member on which at least an objective lens, a focus coil, and a tracking coil are mounted;
The objective lens holding member is rotatable, and a support shaft provided on a base that is supported so as to be able to move up and down, a permanent magnet mounted on the base, and mounted on the objective lens holding material, and mounted on the base. An integrated elastic member to be fixed,
The integral elastic member has a metal plate having a central hole engaged with a projection provided on the objective lens holding member, and a silicon rubber provided on an outer peripheral portion of the metal plate so as to be symmetrical about the central hole. And an insertion pin fixed to the elastic member and fixed to the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108813A JP2792099B2 (en) | 1989-04-27 | 1989-04-27 | Objective lens actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108813A JP2792099B2 (en) | 1989-04-27 | 1989-04-27 | Objective lens actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02285529A JPH02285529A (en) | 1990-11-22 |
| JP2792099B2 true JP2792099B2 (en) | 1998-08-27 |
Family
ID=14494151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1108813A Expired - Fee Related JP2792099B2 (en) | 1989-04-27 | 1989-04-27 | Objective lens actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2792099B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186519U (en) * | 1984-05-23 | 1985-12-10 | シャープ株式会社 | Objective lens device |
-
1989
- 1989-04-27 JP JP1108813A patent/JP2792099B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02285529A (en) | 1990-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |