JPH0359824A - Optical disk device - Google Patents
Optical disk deviceInfo
- Publication number
- JPH0359824A JPH0359824A JP1196331A JP19633189A JPH0359824A JP H0359824 A JPH0359824 A JP H0359824A JP 1196331 A JP1196331 A JP 1196331A JP 19633189 A JP19633189 A JP 19633189A JP H0359824 A JPH0359824 A JP H0359824A
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- objective lens
- memory alloy
- optical head
- shape memory
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 77
- 238000004140 cleaning Methods 0.000 claims abstract description 59
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 29
- 239000011538 cleaning material Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000001678 irradiating effect Effects 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/121—Protecting the head, e.g. against dust or impact with the record carrier
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
光ディスク装置に係り、特に対物レンズのクリーング機
構を備えた光ディスク装置に関し、随時対物レンズの表
面を清浄化できるクリーニング機構を備えた光ディスク
装置の提供を目的とし、
光ディスクと光の授受を行う対物レンズを装着した光学
ヘッドの前記対物レンズ装着位置を前記光ディスクの半
径方向に移動させると共に、更に前記光ディスクの外縁
より外側に位置決め係止する光学ヘッド粗駆動機構と、
前記位置決め係止された対物レンズに対面するように固
定されたクリーニング機構支持部と、前記対物レンズの
光軸方向に摺動および捻転自在に前記クリーニング機構
支持部に支持され、更に前記対物レンズに対面する位置
に光の通過孔を有し、その周囲にクリーニング材を備え
たクリーニング可動部と、前記クリーニング機構支持部
に、部分固定された形状記憶合金部材と、該形状記憶合
金部材を加熱時に伸長捻転する形状回復応力を前記クリ
ーニング可動部に伝達する伝達機構と、前記形状記憶合
金部材を非加熱時に所要の変形形状まで変形させるバイ
アスばねとを備えたクリーニング駆動機構αυとを設け
、前記光学ヘッドの光源から出射するレーザ光を前記形
状記憶合金部材に断続的に照射することにより前記クリ
ーニング可動部の伸縮、捻転運動を利用して前記対物レ
ンズをクリーニングするように構成する。[Detailed Description of the Invention] [Summary] The present invention relates to an optical disc device, particularly an optical disc device equipped with an objective lens cleaning mechanism. an optical head coarse drive mechanism that moves the objective lens mounting position of an optical head equipped with an objective lens that transmits and receives light to and from the optical disc in the radial direction of the optical disc, and further positions and locks the optical head outside the outer edge of the optical disc; ,
a cleaning mechanism support part fixed to face the objective lens which is positioned and locked; a cleaning mechanism support part supported by the cleaning mechanism support part so as to be slidable and twistable in the optical axis direction of the objective lens; A cleaning movable part having a light passage hole at a facing position and having a cleaning material around it; a shape memory alloy member partially fixed to the cleaning mechanism support part; A cleaning drive mechanism αυ including a transmission mechanism for transmitting elongated and twisted shape recovery stress to the cleaning movable part and a bias spring for deforming the shape memory alloy member to a desired deformed shape when not heated is provided, and the cleaning drive mechanism αυ is provided. The objective lens is configured to be cleaned by intermittently irradiating the shape memory alloy member with a laser beam emitted from a light source of the head, thereby utilizing the expansion/contraction and twisting motion of the cleaning movable part.
〔産業上の利用分野〕
本発明は、光ディスク装置に係り、特に対物レンズのク
リーニング機構を備えた光ディスク装置に関する。[Industrial Field of Application] The present invention relates to an optical disc device, and particularly to an optical disc device equipped with an objective lens cleaning mechanism.
光ディスク装置は大容量、可換性、高信頼性によりイメ
ージデータファイルから電子計算機用メモリと、小型か
ら大型まで広い範囲で用いられているコンピュータのメ
モリ装置である。そのため、オフィス・オートメーショ
ン環境より過酷な状態で使用されることがある。Optical disk devices are computer memory devices that are used in a wide range of applications from small to large sizes, from image data files to electronic computer memories due to their large capacity, interchangeability, and high reliability. Therefore, they may be used in harsher conditions than office automation environments.
第３図は従来の光ディスク装置の要部構成図を示す。図
において、ｌは基台となるフレーム、２はフレーム１に
固定されたモータ、３はモータ２の回転出力を伝達する
スピンドル軸、４はスピンドル軸３に嵌着された光ディ
スク、５は光ディスク４に対して光の授受を行う光学ヘ
ッド、５ａは光学ヘッド５の鏡筒部に装着された対物レ
ンズ、６は光学へラド５を光ディスク４の半径方向に駆
動する光学ヘッド粗駆動機構を示す。FIG. 3 shows a block diagram of main parts of a conventional optical disc device. In the figure, l is a frame serving as a base, 2 is a motor fixed to the frame 1, 3 is a spindle shaft that transmits the rotational output of the motor 2, 4 is an optical disk fitted to the spindle shaft 3, and 5 is an optical disk 4 5a is an objective lens mounted on the lens barrel of the optical head 5, and 6 is an optical head rough drive mechanism that drives the optical head 5 in the radial direction of the optical disc 4.
この光ディスク装置は、光学ヘッド５から光ディスク４
に光ビームを照射することにより情報の記録を行い、ま
たその反射光を検出して情報を再生している。すなわち
、この光学ヘッド５の光源から光ビームを照射し、この
光ビームを光学素子の対物レンズ５ａによって集束させ
て光ディスク４に焦点を結ばせ、加熱することによりビ
ア）と呼ばれる小孔を形威し、情報を記録している。ま
た、情報を再生するには光ディスク４番こ形成されたピ
ントに、対物レンズ５ａによって集束された光ビームを
照射し、その反射光を検出することにより行っていた。This optical disc device includes an optical head 5 to an optical disc 4.
Information is recorded by irradiating a light beam onto the disk, and information is reproduced by detecting the reflected light. That is, a light beam is irradiated from the light source of this optical head 5, and this light beam is focused by the objective lens 5a of the optical element to focus on the optical disk 4, and by heating it, a small hole called a via is formed. and record information. In addition, information was reproduced by irradiating a light beam focused by an objective lens 5a onto a focal point formed at the fourth position of the optical disc, and detecting the reflected light.
しかしながら、対物レンズ５ａは光学ヘッド５の先端部
に取りつけられ、対物レンズ５ａを支える鏡筒内でレン
ズが少し下がった凹状になっており、たばこの煙や粉塵
が対物レンズに付着し易くなるような形状をしている。However, the objective lens 5a is attached to the tip of the optical head 5, and the lens has a slightly lowered concave shape within the lens barrel that supports the objective lens 5a, making it easier for cigarette smoke and dust to adhere to the objective lens. It has a shape.
このため光ディスク装置の筐体内部に浮遊する塵埃や外
部から侵入した塵埃が対物レンズ５ａの表面に付着し、
対物レンズ５ａの表面状態によってレーザ光のパワーが
変化し、光ディスク表面への情報の記録・再生の条件が
変化してしまうという問題がある。Therefore, dust floating inside the casing of the optical disk device or dust entering from the outside adheres to the surface of the objective lens 5a.
There is a problem in that the power of the laser beam changes depending on the surface condition of the objective lens 5a, and the conditions for recording and reproducing information on the surface of the optical disk change.
光ディスク装置においては、情報記録媒体である光ディ
スク４を交換する必要があるため、情報の読み取り、あ
るいは書き込みのための光学ヘッド５、特に光ディスク
４に対向して位置する対物レンズ５ａを外部から完全に
遮蔽した構造にすることができない。In an optical disc device, since it is necessary to replace the optical disc 4, which is an information recording medium, the optical head 5 for reading or writing information, especially the objective lens 5a located opposite the optical disc 4, must be completely removed from the outside. It cannot be made into a shielded structure.
そこでこの問題を解決する手段として、光ディスク４を
！！置するターンテーブル等にクリーニングブラシを取
りつけ、ターンテーブルを回転させることによりクリー
ニングブラシを回転させ、この回転するクリーニングブ
ラシによって光学ヘッド５の先端部に取りつけられた対
物レンズ５ａに付着した塵埃は清掃されていた。Therefore, as a means to solve this problem, optical disc 4! ! A cleaning brush is attached to a turntable etc. to be placed, and by rotating the turntable, the cleaning brush is rotated, and the dust attached to the objective lens 5a attached to the tip of the optical head 5 is cleaned by the rotating cleaning brush. was.
上記のクリーニング方法によれば、装着された光ディス
クを連続使用する場合にはクリーニングできない欠点が
ある。According to the above-mentioned cleaning method, there is a drawback that cleaning cannot be performed when the mounted optical disc is used continuously.
本発明は上記従来の欠点に鑑みてなされたもので、随時
対物レンズの表面を清浄化できるクリーニング機構を備
えた光ディスク装置の提供を目的とする。The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide an optical disk device equipped with a cleaning mechanism that can clean the surface of an objective lens at any time.
第１図は本発明の概略構成を示す側面図、第２図は第１
図の要部拡大断面図を示す。光ディスク４と光の授受を
行う対物レンズ５ａを装着した光学ヘッド５の前記対物
レンズ装着位置を前記光ディスクの半径方向に移動させ
ると共に、更に前記光ディスクの外縁より外側に位置決
め係止する光学ヘッド粗駆動機構６８と、前記位置決め
係止された対物レンズに対面するように固定されたクリ
ーニング機構支持部７と、前記対物レンズの光軸方向に
摺動および捻転自在に前記クリーニング機構支持部に支
持され、更に前記対物レンズに対面する位置に光の通過
孔９を有し、その周囲にクリーニング材１０を備えたク
リーニング可動部８と、前記クリーニング機構支持部に
、部分固定された形状記憶合金部材１２と、該形状記憶
合金部材を加熱時に伸長、捻転する形状回復応力を前記
クリーニング可動部に伝達する伝達機構１３と、前記形
状記憶合金部材を非加熱時に所要の変形形状まで変形さ
せるバイアスばね１４とを備えたクリーニング駆動機構
１１とを設け、前記光学ヘッドの光源から出射するレー
ザ光を前記形状記憶合金部材に断続的に照射することに
より前記クリーニング可動部の伸縮、捻転運動を利用し
て前記対物レンズをクリーニングするようにｖ１或する
。FIG. 1 is a side view showing the schematic configuration of the present invention, and FIG.
An enlarged sectional view of the main part of the figure is shown. Rough driving of the optical head for moving the objective lens mounting position of the optical head 5 equipped with the objective lens 5a that transmits and receives light to and from the optical disc 4 in the radial direction of the optical disc, and further positioning and locking the optical head outside the outer edge of the optical disc. a mechanism 68, a cleaning mechanism support part 7 fixed so as to face the objective lens which is positioned and locked, and supported by the cleaning mechanism support part so as to be slidable and twistable in the optical axis direction of the objective lens; Furthermore, a cleaning movable part 8 having a light passage hole 9 at a position facing the objective lens and having a cleaning material 10 around the movable cleaning part 8, and a shape memory alloy member 12 partially fixed to the cleaning mechanism support part. , a transmission mechanism 13 that transmits shape recovery stress that stretches and twists the shape memory alloy member when heated to the cleaning movable part; and a bias spring 14 that deforms the shape memory alloy member to a desired deformed shape when not heated. A cleaning drive mechanism 11 is provided, and the shape memory alloy member is intermittently irradiated with a laser beam emitted from the light source of the optical head, thereby utilizing the expansion/contraction and twisting motion of the cleaning movable part to drive the objective lens. v1 to clean it.
クリーニングを行う場合には、光学ヘッド粗駆動機構６
ａにより光学ヘッド５の対物レンズ５ａ装着部分をクリ
ーニング可動部８の備えた光の通過孔９に対面する位置
に位置決め係止し、この位置において対物レンズ５ａの
トラッキング機構およびフォーカシング機構をロック固
定する。次に光学ヘッド５の光源から書込時相当のレー
ザ光を出射させ、前記光の通過孔９を挿通して形状記憶
合金部材１２を照射加熱する。加熱された形状記憶合金
部材１２は伸長、捻転する形状回復応力を伝達機構１３
によりクリーニング可動部８に伝達し、クリーニング可
動部８の光の通過孔９の周囲に形成されたクリーニング
材１０を対物レンズ５ａの露出面に捻転しながら摺接す
る。これにより対物レンズ５ａの露出面はクリーニング
されるが、レーザ光の照射を止めることにより形状記憶
合金部材１２は非加熱状態となり、バイアスばね１４が
形状記憶合金部材】２を非加熱時に所要の変形形状まで
変形させ、クリーニング材１０は対物レンズ５ａの露出
面から離間する。したがって、レーザ光を前記形状記憶
合金部材１２に断続的に照射することにより前記クリー
ニング可動部８の伸縮、捻転運動を利用して前記対物レ
ンズ５ａをクリーニングすることができる。When cleaning, the optical head rough drive mechanism 6
a, the part of the optical head 5 where the objective lens 5a is mounted is positioned and locked at a position facing the light passage hole 9 provided in the cleaning movable part 8, and the tracking mechanism and focusing mechanism of the objective lens 5a are locked and fixed at this position. . Next, the light source of the optical head 5 emits a laser beam corresponding to the time of writing, and the laser beam is passed through the light passage hole 9 to irradiate and heat the shape memory alloy member 12. The heated shape memory alloy member 12 extends and twists shape recovery stress to the transmission mechanism 13.
The light is transmitted to the cleaning movable part 8, and the cleaning material 10 formed around the light passage hole 9 of the cleaning movable part 8 is slid onto the exposed surface of the objective lens 5a while being twisted. This cleans the exposed surface of the objective lens 5a, but by stopping the laser beam irradiation, the shape memory alloy member 12 becomes unheated, and the bias spring 14 causes the shape memory alloy member 2 to undergo the required deformation when not heated. The cleaning material 10 is separated from the exposed surface of the objective lens 5a. Therefore, by intermittently irradiating the shape memory alloy member 12 with laser light, the objective lens 5a can be cleaned using the expansion/contraction and twisting movements of the cleaning movable section 8.
以下本発明の実施例を図面によって詳述する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
なお、構成、動作の説明を理解し易くするために全図を
通して同一部分には同一符号を付してその重複説明を省
略する。In order to make the explanation of the configuration and operation easier to understand, the same parts are given the same reference numerals throughout the drawings, and their repeated explanation will be omitted.
第１図は本発明の概略構成を示す側面図、第２図は第１
図の要部拡大断面図であって、第２図（ａ）は非加熱時
、第２図（ｂ）は加熱時の状態を示す。FIG. 1 is a side view showing the schematic configuration of the present invention, and FIG.
FIG. 2(a) is an enlarged sectional view of the main part of the figure, and FIG. 2(a) shows the state when not heated, and FIG. 2(b) shows the state when heated.
第１図において、６ａは第３図にて説明した光学ヘッド
粗駆動機構６の機能に、更に光ディスク４の外縁より外
側に位置決め係止する機能を付加した光学ヘッド粗駆動
機構である。７は光ディスク４の外縁より外側に位置決
め係止された光学ヘッド５の対物レンズ５ａに対面する
位置に固定された筒状のクリーニング機構支持部であっ
て、アーム７ａによりフレーム１と連結固定されている
。In FIG. 1, reference numeral 6a denotes an optical head coarse drive mechanism which has the function of the optical head coarse drive mechanism 6 explained in FIG. Reference numeral 7 denotes a cylindrical cleaning mechanism support portion fixed at a position facing the objective lens 5a of the optical head 5 which is positioned and locked outside the outer edge of the optical disk 4, and is connected and fixed to the frame 1 by an arm 7a. There is.
８は前記対物レンズ５ａの光軸方向に摺動および捻転自
在に前記クリーニング機構支持部７に支持された筒状の
クリーニング可動部であって、光学ヘッド５に対面する
部分は半球面状のドーム形に形成され、かつ対物レンズ
５ａに対面する部分は対物レンズ５ａから出射される光
の通過孔９を有し、その周囲にクリーニング材１０を備
えている。クリ−ニング可動部８の筒状の上端は外側に
折り曲げて鍔状に形成され、クリーニング機構支持部７
の筒状の下端を内側に折り曲げた鍔状のストッパ機構に
より脱落を防止している。Reference numeral 8 denotes a cylindrical cleaning movable part supported by the cleaning mechanism support part 7 so as to be slidable and twistable in the optical axis direction of the objective lens 5a, and the part facing the optical head 5 is a hemispherical dome. The portion facing the objective lens 5a has a hole 9 through which light emitted from the objective lens 5a passes, and a cleaning material 10 is provided around the hole 9. The cylindrical upper end of the cleaning movable part 8 is bent outward to form a flange shape, and the cleaning mechanism support part 7
A collar-like stopper mechanism with the cylindrical lower end bent inward prevents it from falling off.
１１はクリーニング駆動機構であって、クリーニング機
構支持部７に部分固定された形状記憶合金部材１２と、
該形状記憶合金部材１２を加熱時に対物レンズ５ａの光
軸方向に伸長、捻転する形状回復応力をクリーニング可
動部８に伝達する伝達機構１３と、形状記憶合金部材１
２を非加熱時に所要の変形形状まで変形させるバイアス
ばね１４とから構成されている。形状記憶合金部材１２
は例えばニッケル・チタンの合金等を用い、クリーニン
グ機構支持部７の天井中心部に突設された中心軸に形状
記憶合金部材１２の中央部を部分固定している。Reference numeral 11 denotes a cleaning drive mechanism, which includes a shape memory alloy member 12 partially fixed to the cleaning mechanism support section 7;
a transmission mechanism 13 that transmits shape recovery stress that causes the shape memory alloy member 12 to expand and twist in the optical axis direction of the objective lens 5a when heated to the cleaning movable section 8; and a shape memory alloy member 1.
2 to a desired deformed shape when not heated. Shape memory alloy member 12
For example, a nickel-titanium alloy or the like is used to partially fix the center portion of the shape memory alloy member 12 to a central shaft protruding from the center of the ceiling of the cleaning mechanism support portion 7.
形状記憶合金部材１２が記憶する変態形状は第２図（ｂ
ｌに示すようにその両端部は下方に向けて湾曲すると共
に、対物レンズ５ａの光軸方向に捻転するような形状に
予め形成し、この形状は変態温度以上の加熱により形状
回復する。常温においてこの形状記憶合金部材１２の両
端部を、例えば第２図（ａｌに示すようにバイアスばね
１４により張力を加え、略棒状に変形させておく。伝達
機構１３は、前記クリーニング可動部８の上端部の鍔状
に形成された面に、前記形状記憶合金部材１２の端部が
嵌合するように設けられた突起部材である。バイアスば
ね１４はコイルばねで示したが、コンパクトに構成する
ために板ばねを用いてもよい。The transformed shape memorized by the shape memory alloy member 12 is shown in FIG.
As shown in 1, both ends are curved downward and twisted in the optical axis direction of the objective lens 5a, and this shape is recovered by heating above the transformation temperature. At room temperature, tension is applied to both ends of the shape memory alloy member 12 by, for example, a bias spring 14 as shown in FIG. It is a protruding member provided so that the end of the shape memory alloy member 12 fits into the brim-shaped surface of the upper end.Although the bias spring 14 is shown as a coil spring, it is configured compactly. A leaf spring may be used for this purpose.
この状態の形状記憶合金部材１２に対して、第２図（ｂ
ｌに示すように光学ヘッド５の光源から出射された書込
レベルのパワーを有するレーザ光を、光の通過孔９を挿
通して照射加熱し、その加熱により発生する形状回復力
はバイアスばね１４の張力に抗して伝達機構１３を介し
てクリーニング可動部８に伝達される結果、光の通過孔
９の周間に設けられたクリーニング材１０は捻転運動を
しながら対物レンズ５ａの露出部に摺接し、クリーニン
グが行われる。The shape memory alloy member 12 in this state is shown in FIG.
As shown in FIG. 1, a laser beam having a writing level power emitted from the light source of the optical head 5 is passed through the light passage hole 9 and heated by irradiation, and the shape recovery force generated by the heating is applied to the bias spring 14. As a result, the cleaning material 10 provided around the light passage hole 9 is transmitted to the exposed part of the objective lens 5a while making a twisting movement. Sliding contact is made and cleaning is performed.
レーザ光の照射を止めることにより形状記憶合金部材１
２の温度は低下し、バイアスばね１４により張力を加え
られ、元の棒状に変形されると共に、対物レンズ５ａの
露出部からクリーニング材は離間される。レーザ光を断
続して照射することによりクリーニングは反復して行わ
れる。By stopping the laser beam irradiation, the shape memory alloy member 1
The temperature of the lens 2 decreases, tension is applied by the bias spring 14, and the cleaning material is deformed into the original rod shape, and the cleaning material is separated from the exposed portion of the objective lens 5a. Cleaning is performed repeatedly by irradiating the laser beam intermittently.
もし、対物レンズ５ａが非球面プラスチックのような材
質で形成されている場合には、光学ヘッド５の鏡筒部の
開放端を平面状の硬質透明部材にて密閉し、その硬質透
明部材の表面をクリーニングすることによりレンズ面の
傷の発生を回避できる。If the objective lens 5a is made of a material such as aspherical plastic, the open end of the lens barrel of the optical head 5 is sealed with a flat hard transparent member, and the surface of the hard transparent member is sealed. By cleaning the lens surface, you can avoid scratches on the lens surface.
以上述べたようなりリーニング機構を採用することによ
り非常にコンパクトに形成することができる効果がある
。As described above, by adopting the leaning mechanism, it is possible to form the device very compactly.
以上の説明から明らかなように本発明によれば、対物レ
ンズに付着する塵埃を適時にクリーニング可能となり、
光ディスク装置の長期高信頼性を可能にする効果がある
。As is clear from the above description, according to the present invention, it is possible to timely clean dust adhering to the objective lens.
This has the effect of enabling long-term high reliability of the optical disk device.
第１図は本発明の概略構成を示す側面図、第２図は第１
図の要部拡大断面図、
第３図は従来の光ディスク装置の要部構成図を示す。
第１図と第２図において、４は光ディスク、５は光学ヘ
ッド、５ａは対物レンズ、６ａは光学ヘッド粗駆動機構
、７はクリーニング機構支持部、８はクリーニング可動
部、９は光の通過孔、１０はクリーニング材、１１はク
リーニング駆動機構、工２は形状記憶合金部材、１３は
伝達機構をそれぞれ示す。
条杯明−茨４楕以１零す側面図
ＬＱ）Ｑｉｙｌｆｉ呼
Ｃｂ）か勲眸
ネｉ区し一１匍籾宏大ｌ乍面図
第２図
６１１＃、Ｘ、Ｆ−組ｇ勤拭端
切−表のぞデンスク１（１【−票１’１５Ｍ八〇〇第３
図FIG. 1 is a side view showing the schematic configuration of the present invention, and FIG.
FIG. 3 is an enlarged sectional view of the main part of the figure, and FIG. 3 shows a configuration diagram of the main part of a conventional optical disc device. 1 and 2, 4 is an optical disk, 5 is an optical head, 5a is an objective lens, 6a is an optical head rough drive mechanism, 7 is a cleaning mechanism support part, 8 is a cleaning movable part, 9 is a light passage hole , 10 is a cleaning material, 11 is a cleaning drive mechanism, 2 is a shape memory alloy member, and 13 is a transmission mechanism. Article 611 #, X, F - side view LQ) Qiylfi call Cb) Cut-Omote Nozo Densk 1 (1 [-vote 1'15M 800th 3rd
figure
Claims (1)
を装着した光学ヘッド（５）の前記対物レンズ装着位置
を前記光ディスクの半径方向に移動させると共に、更に
前記光ディスクの外縁より外側に位置決め係止する光学
ヘッド粗駆動機構（６ａ）と、前記位置決め係止された
対物レンズに対面するように固定されたクリーニング機
構支持部（７）と、前記対物レンズの光軸方向に摺動お
よび捻転自在に前記クリーニング機構支持部に支持され
、更に前記対物レンズに対面する位置に光の通過孔（９
）を有し、その周囲にクリーニング材（１０）を備えた
クリーニング可動部（８）と、 前記クリーニング機構支持部に、部分固定された形状記
憶合金部材（１２）と、該形状記憶合金部材を加熱時に
伸長、捻転する形状回復応力を前記クリーニング可動部
に伝達する伝達機構（１３）と、前記形状記憶合金部材
を非加熱時に所要の変形形状まで変形させるバイアスば
ね（１４）とを備えたクリーニング駆動機構（１１）と
を設け、 前記光学ヘッドの光源から出射するレーザ光を前記形状
記憶合金部材に断続的に照射することにより前記クリー
ニング可動部の伸縮、捻転運動を利用して前記対物レン
ズをクリーニングするようにしたことを特徴とする光デ
ィスク装置。[Claims] Objective lens (5a) that transmits and receives light to and from the optical disc (4)
an optical head rough drive mechanism (6a) that moves the objective lens mounting position of the optical head (5) equipped with the optical head in the radial direction of the optical disc, and further positions and locks the optical head outside the outer edge of the optical disc; a cleaning mechanism support part (7) fixed to face the stopped objective lens; a cleaning mechanism support part (7) supported by the cleaning mechanism support part so as to be slidable and twistable in the optical axis direction of the objective lens; Light passing holes (9
) and a cleaning material (10) around the cleaning movable part (8); a shape memory alloy member (12) partially fixed to the cleaning mechanism support part; A cleaning device comprising a transmission mechanism (13) that transmits shape recovery stress that expands and twists when heated to the cleaning movable part, and a bias spring (14) that deforms the shape memory alloy member to a required deformed shape when not heated. A drive mechanism (11) is provided, and by intermittently irradiating the shape memory alloy member with laser light emitted from the light source of the optical head, the objective lens is moved using the expansion/contraction and twisting motion of the cleaning movable part. An optical disc device characterized in that it is designed to be cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196331A JPH0359824A (en) | 1989-07-27 | 1989-07-27 | Optical disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196331A JPH0359824A (en) | 1989-07-27 | 1989-07-27 | Optical disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0359824A true JPH0359824A (en) | 1991-03-14 |
Family
ID=16356050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1196331A Pending JPH0359824A (en) | 1989-07-27 | 1989-07-27 | Optical disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0359824A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5268890A (en) * | 1993-02-09 | 1993-12-07 | Delco Electronics Corporation | Self-cleaning optical disc system |
| US5467238A (en) * | 1993-07-06 | 1995-11-14 | Quantum Corporation | Cleaning apparatus for heads of data storage disks |
-
1989
- 1989-07-27 JP JP1196331A patent/JPH0359824A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5268890A (en) * | 1993-02-09 | 1993-12-07 | Delco Electronics Corporation | Self-cleaning optical disc system |
| US5467238A (en) * | 1993-07-06 | 1995-11-14 | Quantum Corporation | Cleaning apparatus for heads of data storage disks |
| US5486970A (en) * | 1993-07-06 | 1996-01-23 | Quantum Corporation | Cleaning apparatus for heads of data storage disks |
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