JPH0636308A - Optical device - Google Patents
Optical deviceInfo
- Publication number
- JPH0636308A JPH0636308A JP18970192A JP18970192A JPH0636308A JP H0636308 A JPH0636308 A JP H0636308A JP 18970192 A JP18970192 A JP 18970192A JP 18970192 A JP18970192 A JP 18970192A JP H0636308 A JPH0636308 A JP H0636308A
- Authority
- JP
- Japan
- Prior art keywords
- elastic member
- storage medium
- information storage
- objective lens
- optical
- 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
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば、光ディスク
に対し情報処理を施す光学装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device for processing information on an optical disk, for example.
【０００２】[0002]
【従来の技術】この種の光学装置としては図５に示すよ
うなものが知られている。2. Description of the Related Art An optical device of this kind is known as shown in FIG.
【０００３】すなわち、図中１は固定部で、この固定部
１には上下部２枚の平行な板バネ（弾性板状部材）２，
３の一端部が固定されている。前記上下部の板バネ２，
３の他端部には保持部としての可動部４が取り付けられ
ている。That is, in the figure, reference numeral 1 denotes a fixed portion, and the fixed portion 1 includes two upper and lower parallel leaf springs (elastic plate members) 2,
One end of 3 is fixed. The upper and lower leaf springs 2,
A movable portion 4 as a holding portion is attached to the other end portion of 3.
【０００４】上記可動部４には対物レンズ５、およびこ
の対物レンズ５をフォ−カス方向に動作させる駆動コイ
ル６が保持されている。The movable section 4 holds an objective lens 5 and a drive coil 6 for operating the objective lens 5 in the focus direction.
【０００５】このように構成される光学ヘッドアクチュ
エ−タはキャリッジ７に搭載されてトラッキング方向に
駆動されるようになっている。The optical head actuator thus constructed is mounted on the carriage 7 and driven in the tracking direction.
【０００６】ところで、従来においては、上記上下２枚
の平行な板バネ２，３は断面積が等しく、略同一形状に
構成されていたため、２枚の板バネ２，３のバネ定数が
略等しいものとなっていた。By the way, in the prior art, the upper and lower two parallel leaf springs 2 and 3 have the same cross-sectional area and are configured to have substantially the same shape. Therefore, the two leaf springs 2 and 3 have substantially the same spring constant. It was a thing.
【０００７】このため、板バネ２，３の先端部に取り付
けられた対物レンズ５をフォ−カス方向に駆動するため
のコイル６、およびその他の光学素子（図示しない）な
どを保持する可動部４の全体の上下方向の重心をほぼ２
枚の板バネ２，３間のセンタ−に持って来る必要があっ
た。For this reason, the movable portion 4 for holding the coil 6 for driving the objective lens 5 attached to the tip end portions of the leaf springs 2, 3 in the focus direction and other optical elements (not shown) and the like. The vertical center of gravity of the entire
It was necessary to bring it to the center between the two leaf springs 2 and 3.
【０００８】[0008]
【発明が解決しようとする課題】ところで、上記可動部
４に保持される対物レンズ５は光ディスクに近接する必
要があるため、可動部４の重心が上部側に位置してしま
う。したがって、可動部４の全体の重心を下げるため
に、前記駆動コイル６などの配置に制約を受けたり、あ
るいは、カウンタ−ウエイトを取り付けるなどの手段を
講じていた。By the way, since the objective lens 5 held by the movable portion 4 needs to be close to the optical disk, the center of gravity of the movable portion 4 is located on the upper side. Therefore, in order to lower the center of gravity of the entire movable portion 4, the arrangement of the drive coil 6 or the like is restricted, or measures such as attaching a counter weight are taken.
【０００９】しかしながら、上記の手段では可動部４の
上下方向の外形が大きくなったり、あるいは、カウンタ
ウエ−トなどのために重量が大きくなったりして、先端
可動部４の小型軽量化、高駆動感度化、低消費電力化な
どの妨げになるという問題があった。However, in the above means, the outer shape of the movable portion 4 in the vertical direction becomes large, or the weight becomes large due to the counterweight and the like, so that the movable end portion 4 is made small and lightweight, and the height thereof is high. There is a problem that it hinders higher driving sensitivity and lower power consumption.
【００１０】そこで、本発明は、保持部の重心を弾性板
状部材間のセンタ−に位置させることなく、良好に駆動
できるようにした光学ヘッドアクチュエ−タを提供する
ことを目的とする。Therefore, it is an object of the present invention to provide an optical head actuator which can be favorably driven without locating the center of gravity of the holding portion at the center between the elastic plate members.
【００１１】[0011]
【課題を解決するための手段】本発明は、上記課題を解
決するために、情報記憶媒体に対し光を案内する光学手
段と、第１の弾性部材及びこの第１の弾性部材に比較し
前記情報記憶媒体から遠い位置に配置され前記第１の弾
性部材の弾性率よりも小さな弾性の第２の弾性部材から
構成され、前記第２の弾性部材に比較し前記第１の弾性
部材近傍で前記光学手段を取り付け、前記情報記憶媒体
に対し前記光学手段を駆動する駆動手段とを具備してな
る。In order to solve the above-mentioned problems, the present invention provides an optical means for guiding light to an information storage medium, a first elastic member and a first elastic member in comparison with the above. The second elastic member is arranged at a position distant from the information storage medium and has elasticity smaller than the elastic modulus of the first elastic member. The second elastic member is located near the first elastic member as compared with the second elastic member. The optical storage device comprises drive means for mounting the optical means and driving the optical means with respect to the information storage medium.
【００１２】[0012]
【作用】上述の構成をとることにより、第１および第２
弾性部材の断面２次モ−メントを略等しくし、保持部全
体の上下方向の重心を第１および第２の弾性部材間のセ
ンタ−より上方に位置させても良好に駆動できるように
した。With the above configuration, the first and second
The secondary moments of the cross section of the elastic member are made substantially equal, and even if the vertical center of gravity of the entire holding portion is located above the center between the first and second elastic members, good driving is possible.
【００１３】[0013]
【実施例】以下、本発明を図１〜図４に示す一実施例を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS.
【００１４】図１は光学ヘッドアクチユェ−タ１０を示
すもので、図中１１は固定部である。この固定部１１に
は平行な状態で支持手段を構成する第１および第２の弾
性部材としての上側の板バネ１２，１２および下側の板
バネ１３の一端部が固定されている。FIG. 1 shows an optical head actuator 10, in which 11 is a fixed portion. One end portion of the upper leaf springs 12 and 12 and the lower leaf spring 13 as the first and second elastic members constituting the supporting means is fixed to the fixing portion 11 in parallel.
【００１５】上記上下部の板バネ１２，１２，１３の他
端部には保持部としての可動部１４が取り付けられてい
る。A movable portion 14 as a holding portion is attached to the other ends of the upper and lower leaf springs 12, 12, 13.
【００１６】上記可動部１４には対物レンズ１５および
この対物レンズ５を挟んだ左右両側に磁気回路（図示し
ない）、さらに、駆動コイル１６が保持され、コイル１
６に電流を流すと、可動部１４全体がフォ−カス方向
（光軸方向）に移動するようになっている。The movable portion 14 holds an objective lens 15 and magnetic circuits (not shown) on both the left and right sides of the objective lens 5, and a drive coil 16 for holding the coil 1.
When a current is applied to 6, the entire movable portion 14 moves in the focus direction (optical axis direction).
【００１７】また、対物レンズ１５は可動部１４の板バ
ネ１２，１２近傍に取り付けられる。The objective lens 15 is attached to the movable portion 14 near the leaf springs 12, 12.
【００１８】このように構成される光学ヘッドアクチユ
ェ−タ１０は図２に示すように、キャリッジ２１に搭載
され、トラッキング方向に駆動される。この光学ヘッド
アクチユェ−タ１０を搭載したキャリッジ２１はリニヤ
ガイドシャフト２２に沿ってガイドされるようになって
いる。The optical head actuator 10 thus constructed is mounted on a carriage 21 and driven in the tracking direction, as shown in FIG. A carriage 21 on which the optical head actuator 10 is mounted is guided along a linear guide shaft 22.
【００１９】ところで、上記第１の板バネ１２，１２の
断面積の和は第２の板バネ１３の断面積より大きくさ
れ、第１の板バネ１２，１２のバネ定数は第２の板バネ
１３のバネ定数より大きくなっている。By the way, the sum of the sectional areas of the first leaf springs 12 and 12 is made larger than the sectional area of the second leaf spring 13, and the spring constant of the first leaf springs 12 and 12 is the second leaf spring. It is larger than the spring constant of 13.
【００２０】図３および図４に示すように、上記第１の
板バネ１２，１２の板厚ｈ1 と、第２の板バネ１３の板
厚ｈ2 の関係はｈ1 ＞ｈ2 とされ、図３のＸ1 軸まわり
の第１の板バネ１２，１２の断面二次モ−メントＩ1 ，
Ｉ1 ′と、Ｘ2 軸回りの第２の板バネ１３の断面２次モ
−メントＩ2 とが略等しくなっている。As shown in FIGS. 3 and 4, the thickness h 1 of the first plate spring 12 and 12, the relationship between the plate thickness h 2 of the second plate spring 13 is set to h 1> h 2 , A cross-sectional secondary moment I 1 of the first leaf springs 12, 12 around the X 1 axis in FIG.
I 1 ′ and the cross-sectional secondary moment I 2 of the second leaf spring 13 around the X 2 axis are substantially equal.
【００２１】このような構成にすることにより、第１お
よび第２の板バネ１２，１２，１３先端の可動部１４全
体の上下方向動の重心を第１および第２の板バネ１２，
１２，１３の間隔のセンタ−に下げることなく、上方に
位置した状態でも良好に駆動させることができる。With such a structure, the center of gravity of the vertical movement of the entire movable portion 14 at the tips of the first and second leaf springs 12, 12, 13 is set to the first and second leaf springs 12, 12.
It is possible to drive well even in a state of being positioned above without lowering it to the center with the interval of 12 and 13.
【００２２】したがって、従来のように、カウンタ−ウ
エ−トなどを用いて可動部１４の重心を下げる必要がな
く、小型軽量、高駆動感度化、低消費電力化が可能とな
る。Therefore, unlike the conventional case, it is not necessary to lower the center of gravity of the movable portion 14 by using a counter-weight or the like, and it is possible to reduce the size and weight, the driving sensitivity, and the power consumption.
【００２３】[0023]
【発明の効果】以上、説明したように本発明によれば、
情報記憶媒体に対し光を案内する光学手段と、第１の弾
性部材及びこの第１の弾性部材に比較し前記情報記憶媒
体から遠い位置に配置され前記第１の弾性部材の弾性率
よりも小さな弾性の第２の弾性部材から構成され、前記
第２の弾性部材に比較し前記第１の弾性部材近傍で前記
光学手段を取り付け、前記情報記憶媒体に対し前記光学
手段を駆動する駆動手段とを具備してなるから、保持部
の移動方向の重心を第１および第２の弾性部材間のセン
タ−に下げることなく、上方に位置した状態でも良好に
駆動できる。As described above, according to the present invention,
Optical means for guiding light to the information storage medium, a first elastic member, and a smaller elastic modulus than that of the first elastic member, which is arranged farther from the information storage medium than the first elastic member. Drive means for driving the optical means with respect to the information storage medium, comprising an elastic second elastic member, the optical means being attached in the vicinity of the first elastic member as compared with the second elastic member. Since it is provided, the center of gravity of the holding portion in the moving direction is not lowered to the center between the first and second elastic members, and can be favorably driven even in the upper position.
【００２４】したがって、従来のように、カウンタ−ウ
エ−トなどを用いて保持部の重心を下げる必要がなく、
小型軽量、高駆動感度化、低消費電力化が可能となると
いった種々の効果を奏する。Therefore, unlike the conventional case, it is not necessary to lower the center of gravity of the holding portion by using a counter-weight or the like,
Various effects such as small size and light weight, high driving sensitivity, and low power consumption can be achieved.
【図１】本発明の一実施例である光学ヘッドアクチュエ
−タを示す斜視図。FIG. 1 is a perspective view showing an optical head actuator according to an embodiment of the present invention.
【図２】図１の光学ヘッドアクチュエ−タを搭載するキ
ャリッジと、このキャリッジをガイドするガイドシャフ
トを示す斜視図。FIG. 2 is a perspective view showing a carriage on which the optical head actuator of FIG. 1 is mounted and a guide shaft for guiding the carriage.
【図３】図１の光学ヘッドアクチュエ−タの第１の板バ
ネを示す断面図。3 is a sectional view showing a first leaf spring of the optical head actuator of FIG.
【図４】図１の光学ヘッドアクチュエ−タの第２の板バ
ネを示す断面図。4 is a sectional view showing a second leaf spring of the optical head actuator of FIG.
【図５】従来の光学ヘッドアクチュエ−タを示す斜視
図。FIG. 5 is a perspective view showing a conventional optical head actuator.
１２…第１の板バネ（第１の弾性部材）、１３…第２の
板バネ（第２の弾性部材）１４…可動部（保持部）、１
５…対物レンズ、１６…駆動コイル。12 ... 1st leaf spring (1st elastic member), 13 ... 2nd leaf spring (2nd elastic member) 14 ... Movable part (holding part), 1
5 ... Objective lens, 16 ... Drive coil.
Claims (2)
段と、 第１の弾性部材及びこの第１の弾性部材に比較し前記情
報記憶媒体から遠い位置に配置され前記第１の弾性部材
の弾性率よりも小さな弾性の第２の弾性部材から構成さ
れ、前記第２の弾性部材に比較し前記第１の弾性部材近
傍で前記光学手段を取り付け、前記情報記憶媒体に対し
前記光学手段を駆動する駆動手段とを具備したことを特
徴とする光学装置。1. An optical means for guiding light to an information storage medium, a first elastic member, and a first elastic member which is arranged at a position farther from the information storage medium than the first elastic member. It is composed of a second elastic member having an elasticity smaller than the elastic modulus, and the optical means is attached near the first elastic member as compared with the second elastic member, and the optical means is driven with respect to the information storage medium. An optical device comprising:
ズおよびこの対物レンズを前記情報記憶媒体に対し接離
する方向に駆動する駆動コイルを保持する保持部と、 前記情報記憶媒体に近接する第１の弾性部材およびこの
第１の弾性部材に平行な第２の弾性部材からなり、前記
保持部を変位自在に支持する支持手段と、を具備し、 前記支持手段の第１の板状弾性部材の断面積を前記第２
の弾性板状部材の断面積より大としたことを特徴とする
光学装置。2. An objective lens that is closely opposed to the information storage medium, a holding unit that holds a drive coil that drives the objective lens in a direction in which the objective lens is moved toward and away from the information storage medium, and a holding unit that is close to the information storage medium. A first elastic member and a second elastic member that is parallel to the first elastic member, and that supports the holding portion in a displaceable manner. The cross-sectional area of the second
An optical device having a larger cross section than the elastic plate-shaped member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18970192A JPH0636308A (en) | 1992-07-16 | 1992-07-16 | Optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18970192A JPH0636308A (en) | 1992-07-16 | 1992-07-16 | Optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0636308A true JPH0636308A (en) | 1994-02-10 |
Family
ID=16245750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18970192A Pending JPH0636308A (en) | 1992-07-16 | 1992-07-16 | Optical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636308A (en) |
-
1992
- 1992-07-16 JP JP18970192A patent/JPH0636308A/en active Pending
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