JPH0411327A - Optical disk device including separate optical head - Google Patents
Optical disk device including separate optical headInfo
- Publication number
- JPH0411327A JPH0411327A JP11349490A JP11349490A JPH0411327A JP H0411327 A JPH0411327 A JP H0411327A JP 11349490 A JP11349490 A JP 11349490A JP 11349490 A JP11349490 A JP 11349490A JP H0411327 A JPH0411327 A JP H0411327A
- Authority
- JP
- Japan
- Prior art keywords
- guide rails
- optical system
- main optical
- fixed
- guide
- 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 76
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 230000008646 thermal stress Effects 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009955 peripheral mechanism Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
フォーカシング・アクチュエータおよびトラッキング・
アクチュエータのみが移動し、主光学系は固定側に配設
された分離型光学ヘッドを含む光ディスク装置の構造に
関し、
小型、直両性で温度上昇による各構成部品の熱膨張によ
る光軸の狂いを抑制可能な光ディスク装置の主構造を提
供することを目的とし、光源を含む光学検出系を有する
主光学系画定部と光点駆動機構系を有する可動部とを分
離し、前記両部を可変長光路により結合してなる分離型
光学ヘッドを含む光ディスク装置において、直線状に平
行配置されたガイドレールの一端側にスピンドルを軸支
したベースを固定し、他端側には前記ガイドレールを位
置決めの基準として前記主光学系固定部を固定し、前記
ガイドレールの中間部を前記可動部の移動案内用として
機能させるように構成する。[Detailed description of the invention] [Overview] Focusing actuator and tracking actuator
Regarding the structure of the optical disk device, which includes a separate optical head in which only the actuator moves and the main optical system is located on the fixed side, it is compact, linear, and suppresses deviation of the optical axis due to thermal expansion of each component due to temperature rise. In order to provide a main structure of an optical disc device that is possible, a main optical system defining part having an optical detection system including a light source and a movable part having a light spot driving mechanism system are separated, and both parts are connected to a variable length optical path. In an optical disk device including a separate type optical head coupled to each other, a base that pivotally supports a spindle is fixed to one end of guide rails arranged in parallel in a straight line, and the guide rail is used as a positioning reference at the other end. The main optical system fixed part is fixed, and the intermediate part of the guide rail is configured to function as a movement guide for the movable part.
本発明はフォーカシング・アクチュエータおよびトラッ
キング・アクチュエータのみが移動し、主光学系は固定
側に配設された分離型光学ヘッドを含む光ディスク装置
の構造に関する。The present invention relates to the structure of an optical disk device including a separate optical head in which only a focusing actuator and a tracking actuator move, and the main optical system is disposed on a fixed side.
第４図は従来の分離型光学ヘッドを含む光ディスク装置
の要部斜視図を示す。図において、１はベースであって
装置軽量化の観点からアルミ鋳物等で製作されたもので
ある。２はベースｌに設けられたスピンドル取りつけ面
１ａと回転自在に精度良く滑合するスピンドル、３はス
ピンドル２に固定されたフランジであって、このフラン
ジ３の表面３ａには図示しない円盤形の記録媒体の中心
部が精度よく密着嵌合し、スピンドル２によってその記
録媒体は回転駆動される。FIG. 4 shows a perspective view of essential parts of an optical disc device including a conventional separation type optical head. In the figure, reference numeral 1 denotes a base, which is made of aluminum casting or the like in order to reduce the weight of the device. Reference numeral 2 denotes a spindle which is rotatably and accurately slidably fitted to the spindle mounting surface 1a provided on the base l, 3 is a flange fixed to the spindle 2, and the surface 3a of this flange 3 has a disk-shaped record (not shown). The center portions of the media are closely fitted with high precision, and the recording media are rotationally driven by the spindle 2.
４はベース１に設けられた主光学系取りつけ面１ｂに精
度良く固定された主光学系固定部であって、４ａはその
主光学系固定部４から後述する可動部５に対して正確に
出射される光軸４ａを示す。５はフォーカシング・アク
チュエータおよびトラッキング・アクチュエータを搭載
する可動部であって、５ａはその可動部５の移動軸を示
し、その移動軸５ａの方向は前記光軸４ａの方向と共に
前記記録媒体の半径方向に平行に精度良く位置決めされ
ていて、可動部５と主光学系固定部４とは光学的に結ば
れている。５ｂは可動部５に搭載された対物レンズであ
って、主光学系固定部４の出射光を受光し、この対物レ
ンズ５ｂを介して記録媒体の所要のトラック上に光点を
形成し、またその記録媒体からの反射光を受光して主光
学系固定部４に返送する機能を有する。Reference numeral 4 denotes a main optical system fixing part that is precisely fixed to the main optical system mounting surface 1b provided on the base 1, and 4a is a main optical system fixing part that accurately outputs light from the main optical system fixing part 4 to a movable part 5, which will be described later. The optical axis 4a shown in FIG. Reference numeral 5 denotes a movable part on which a focusing actuator and a tracking actuator are mounted, and 5a indicates a moving axis of the movable part 5, and the direction of the moving axis 5a is in the radial direction of the recording medium as well as the direction of the optical axis 4a. The movable part 5 and the main optical system fixed part 4 are optically connected. Reference numeral 5b denotes an objective lens mounted on the movable part 5, which receives the light emitted from the main optical system fixed part 4, forms a light spot on a desired track of the recording medium via this objective lens 5b, and It has a function of receiving the reflected light from the recording medium and sending it back to the main optical system fixing section 4.
可動部５を移動軸５ａの方向に案内する機構は、可動部
５の両側面に突設した複数（３箇所）の軸受５ｃにそれ
ぞれ装着された玉軸受５ｄが、ベース１に加工形成され
た複数のガイドレール取りつけ面ｌｃ、 ｌｄにそれぞ
れ画定されたガイドレール６ａ、 ６ｂに接触案内され
、後述する第２図に示すような直線駆動電動機（ボイス
コイルモータ）によって移動軸５ａの方向に往復駆動さ
れる構成になっている。The mechanism for guiding the movable part 5 in the direction of the moving axis 5a is formed by processing and forming ball bearings 5d on the base 1, each of which is attached to a plurality of (three) bearings 5c protruding from both sides of the movable part 5. It is guided in contact with guide rails 6a and 6b defined on a plurality of guide rail mounting surfaces lc and ld, respectively, and is reciprocated in the direction of the moving axis 5a by a linear drive motor (voice coil motor) as shown in FIG. 2, which will be described later. The configuration is such that
ガイドレール６ａ、 ６ｂは複数の玉軸受５ｄの接触従
動に伴う摩耗を避けるために高硬度の部材を用い、ベー
ス１に対しては固定ボルト等を用い、ガイドレールの軸
芯に対して直交する方向に螺着している。また、前記フ
ランジ３の表面３ａと光軸４ａと移動軸５ａとの間には
高精度の平行度が達成されている必要がある。The guide rails 6a and 6b are made of a high-hardness member in order to avoid wear due to contact and follow-up of the plurality of ball bearings 5d, and fixing bolts or the like are used for the base 1, so that the guide rails are perpendicular to the axis of the guide rail. It is screwed in the direction. Further, highly accurate parallelism must be achieved between the surface 3a of the flange 3, the optical axis 4a, and the moving axis 5a.
この平行度が充分に高精度に形成されていないと対物レ
ンズ５ｂから図示しない記録媒体へ集光される光ビーム
の光軸と記録媒体の表面とが垂直関係を保持でなくなっ
たり、可動部５の移動により主光学系固定部４と記録媒
体間の光学的位置関係に変動が生じたり、記録媒体から
の反射光が正確に主光学系画定部４に戻らない等の不都
合が発生する。If this parallelism is not formed with a sufficiently high precision, the optical axis of the light beam focused from the objective lens 5b onto a recording medium (not shown) may not maintain a perpendicular relationship with the surface of the recording medium, or the movable part 5 This movement causes problems such as fluctuations in the optical positional relationship between the main optical system fixing section 4 and the recording medium, and the fact that reflected light from the recording medium does not accurately return to the main optical system defining section 4.
この図に示す例では、ベース１のガイドレール取りつけ
面１ｃ、 Ｉｄ、主光学系固定部４の取りつけ面１ｂお
よびスピンドル取りつけ面１ａの平行度を正確、かつ精
密に加工することによって上記の平行度を達成している
。In the example shown in this figure, the above-mentioned parallelism is achieved by accurately and precisely processing the parallelism of the guide rail mounting surfaces 1c and Id of the base 1, the mounting surface 1b of the main optical system fixing part 4, and the spindle mounting surface 1a. has been achieved.
しかしながら、上記機構はベース１の各部に加工された
取りつけ面１ａ、 ｌｂ、 Ｉｃ、 １ｄを基準として
組み立て構成されており、ベース１がアルミ製であるこ
とから軽量を保持したままベース１の剛性を高くするこ
とが比較的困難であり、静的には平行度が保持されてい
ても可動部５の高速運動に伴う加速度外乱によってベー
スｌを含む周辺機構の撓み振動が励振され、動的には平
行度が保持できなくなる恐れがあった。However, the above mechanism is assembled based on the mounting surfaces 1a, lb, Ic, and 1d machined into each part of the base 1, and since the base 1 is made of aluminum, the rigidity of the base 1 can be increased while maintaining its light weight. It is relatively difficult to increase the height, and even if the parallelism is maintained statically, the acceleration disturbance accompanying the high-speed movement of the movable part 5 excites the bending vibrations of the peripheral mechanisms including the base l, and dynamically There was a risk that parallelism could not be maintained.
また、この構造では熱膨張数の異なる部品が接し合うこ
と、また構造自体からも各構成部品の熱膨張によってベ
ース１自体が変形し易く、光学系の光軸も狂い易くなる
欠点がある。Further, this structure has the disadvantage that components having different thermal expansion numbers come into contact with each other, and that the base 1 itself is easily deformed due to the thermal expansion of each component, and the optical axis of the optical system is also likely to be deviated.
本発明は上記従来の欠点に鑑みてなされたもので、小型
、直間性で温度上昇による各構成部品の熱膨張による光
軸の狂いを抑制可能な光ディスク装置の主構造を提供す
ることを目的とする。The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide a main structure of an optical disk device that is compact, direct, and capable of suppressing misalignment of the optical axis due to thermal expansion of each component due to temperature rise. shall be.
第１図は本発明の第１の実施例、第３図は本発明の第２
の実施例を示す。光源を含む光学検出系を有する主光学
系固定部４と光点駆動機構系を有する可動部５とを分離
し、前記両部を可変長光路により結合してなる分離型光
学ヘッドを含む光ディスク装置において、直線状に平行
配置されたガイドレール８ａ、８ｂの一端側にスピンド
ル２を軸支したベース７を固定し、他端側には前記ガイ
ドレール８ａ、 ８ｂを位置決めの基準として前記主光
学系固定部４を固定し、前記ガイドレールの中間部を前
記可動部５の移動案内用として機能させる。また、前記
ガイドレール８ａ、 ８ｂを前記可動部５の駆動機構系
を構成する直線駆動電動機の磁気回路の一部として構成
する。FIG. 1 shows the first embodiment of the present invention, and FIG. 3 shows the second embodiment of the present invention.
An example is shown below. An optical disk device including a separated optical head in which a main optical system fixed part 4 having an optical detection system including a light source and a movable part 5 having a light spot driving mechanism system are separated, and the two parts are connected by a variable length optical path. A base 7 with a spindle 2 pivotally supported is fixed to one end of guide rails 8a and 8b arranged in parallel in a straight line, and the main optical system is mounted on the other end using the guide rails 8a and 8b as a positioning reference. The fixed part 4 is fixed, and the intermediate part of the guide rail functions as a movement guide for the movable part 5. Further, the guide rails 8a and 8b are configured as part of a magnetic circuit of a linear drive motor that constitutes the drive mechanism system of the movable portion 5.
上記構造においては、可動部５を案内するガイドレール
８ａ、 ８ｂが主光学系固定部４の固定基準を兼ねてい
ることから、主光学系固定部４と可動部５とを結ぶ可変
長光路の光軸はガイドレール８ａ。In the above structure, since the guide rails 8a and 8b that guide the movable part 5 also serve as the fixing reference for the main optical system fixing part 4, the variable length optical path connecting the main optical system fixing part 4 and the movable part 5 is fixed. The optical axis is the guide rail 8a.
８ｂが何等かの理由で曲がったりしない限り正確に保持
できる。しかも、構造上熱応力等によってガイドレール
８ａ、 ８ｂが変形する可能性は少ない。また、構造上
このガイドレール８ａ、 ８ｂは可動部５を駆動するた
めの直線駆動電動機の磁気回路の一部として利用するこ
とができる。As long as 8b does not bend for some reason, it can be held accurately. Moreover, the possibility that the guide rails 8a, 8b will be deformed due to thermal stress or the like is low due to their structure. Further, structurally, the guide rails 8a, 8b can be used as part of the magnetic circuit of the linear drive motor for driving the movable part 5.
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
通じ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。Note that, in order to make the explanation of the configuration and operation easier to understand, the same parts are given the same reference numerals throughout all the figures, and repeated explanation thereof will be omitted.
第１図は本発明の第一の実施例である。図において、７
はスピンドル２と図示しないスピンドル駆動モータを内
蔵したベースである。スピンドル２を回転自在に保持す
るためにベース７に加工形成されたスピンドル取りつけ
面７ａとスピンドル２に取りつけられたフランジ３のフ
ランジ表面３ａとの平行度が高精度に保持されている。FIG. 1 shows a first embodiment of the invention. In the figure, 7
A base includes a spindle 2 and a spindle drive motor (not shown). The parallelism between the spindle mounting surface 7a formed on the base 7 to rotatably hold the spindle 2 and the flange surface 3a of the flange 3 attached to the spindle 2 is maintained with high precision.
８ａ、 ８ｂはベース７に一端側を圧入された円柱状の
ガイドレールであって、マルテンサイト系ステンレス鋼
、工具鋼、ベリリウム銅等にて製作されており、ベース
７に加工された圧入孔中心軸はスピンドル取りつけ面７
ａと充分な平行度が得られるように加工され、また両ガ
イドレールの圧入孔中心軸間の平行度、および両ガイド
レールの真直度も十分な精度に加工されている。さらに
各ガイドレール８ａ、 ８ｂの直径は外乱振動等に耐え
るため従来のガイドレールに比較して太くなっている。8a and 8b are cylindrical guide rails with one end press-fitted into the base 7, made of martensitic stainless steel, tool steel, beryllium copper, etc. The shaft is the spindle mounting surface 7
The parallelism between the center axes of the press-fit holes of both guide rails and the straightness of both guide rails are also machined with sufficient accuracy. Furthermore, the diameter of each guide rail 8a, 8b is thicker than that of a conventional guide rail in order to withstand external vibrations and the like.
このガイドレール８ａ、 ８ｂにそれぞれ接触摺動する
複数の玉軸受５ｄを直角に保持する軸受５ｃに支持され
た可動部５が、図示しない記録媒体の半径方向（移動軸
５ａの方向）に往復移動する。主光学系固定部４はガイ
ドレール８ａ、 ８ｂの他端部を基準として位置決め配
設されている。即ち、主光学系固定部４の上面の延長平
面を形成する取付金具４ｂ４Ｃと両ガイドレール８ａ、
８ｂが接触する位置と、主光学系固定部４を挟む両ガ
イドレールの間隔寸法と、可動部５に対する可変長光路
に光軸４ａの方向を合致させた方向に位置決めすること
によって配置が決定され、位置決め後は両ガイドレール
に取付金具４ｂ、 ４ｃと、固定板９とを挟持固定する
。The movable part 5 supported by a bearing 5c that holds a plurality of ball bearings 5d perpendicularly sliding in contact with the guide rails 8a and 8b, respectively, reciprocates in the radial direction of the recording medium (not shown) (in the direction of the moving axis 5a). do. The main optical system fixing part 4 is positioned with reference to the other ends of the guide rails 8a and 8b. That is, the mounting bracket 4b4C forming an extension plane of the upper surface of the main optical system fixing part 4, both guide rails 8a,
The arrangement is determined by positioning the optical axis 4a in a direction that matches the position where the optical axis 8b contacts, the distance between the two guide rails that sandwich the main optical system fixed part 4, and the variable length optical path to the movable part 5. After positioning, the mounting brackets 4b, 4c and the fixing plate 9 are clamped and fixed to both guide rails.
この系では、両ガイドレール８ａ、 ８ｂが主光学系固
定部４の固定基準を兼ねていることから、主光学系固定
部４と可動部５との光学的位置関係は、ガイドレールそ
のものが何等かの理由で曲がったりしない限り正確に保
持される。しかも第４図に示した従来例ではガイドレー
ルとベースの熱膨張率の差等によってガイドレールが曲
がったり、ベースが曲がったりする可能性が多いのに対
して、この系では構造上熱応力等によってガイドレール
が変形する可能性は少ない。In this system, since both guide rails 8a and 8b also serve as fixing standards for the main optical system fixing section 4, the optical positional relationship between the main optical system fixing section 4 and the movable section 5 depends on the guide rails themselves. It will be held accurately unless it bends for some reason. Moreover, in the conventional example shown in Figure 4, there is a high possibility that the guide rail or the base will bend due to differences in thermal expansion coefficients between the guide rail and the base, whereas this system is susceptible to thermal stress due to its structure. There is little possibility that the guide rail will be deformed.
また、構造的に簡単であり、より軽量化される。It is also structurally simpler and lighter.
このことから、ガイドレールの直径を従来例より太くす
ることが可能で、これは装置構造を高剛性化することに
寄与し、またこれは可動部支持軸受の高剛性化にも繋が
る。From this, it is possible to make the diameter of the guide rail larger than in the conventional example, which contributes to increasing the rigidity of the device structure, and also leads to increasing the rigidity of the movable part support bearing.
第２図は第１図における可動部の駆動機構の斜視図を示
す。図において、５ｅは偏平コイルであって可動部５の
底部に跨設され、１０はその跨設空間を非接触状態に貫
通して可動部５の移動方向に平行して固定側（例えばベ
ース７）に取りつけられた継鉄である。ｌｌａとＩｌｂ
は磁化方向の異なる永久磁石であって継鉄１２の両端に
配置し、偏平コイル５ｅに対向して非接触状態を保持す
るように装置の固定側（例えばベース１）に取りつけ、
これと継鉄１０との間に偏平コイル５ｅを挟み、偏平コ
イル５ｅに通電することにより直線駆動電動機を構成し
ている。FIG. 2 shows a perspective view of the drive mechanism of the movable part in FIG. 1. In the figure, reference numeral 5e denotes a flat coil that straddles the bottom of the movable part 5, and 10 penetrates the straddle space in a non-contact state and runs parallel to the moving direction of the movable part 5 on the fixed side (for example, the base 7). ) is a yoke attached to the yoke. lla and lb
are permanent magnets with different magnetization directions, and are placed at both ends of the yoke 12, and are attached to the fixed side of the device (for example, the base 1) so as to face the flat coil 5e and maintain a non-contact state.
A flat coil 5e is sandwiched between this and the yoke 10, and a linear drive motor is constructed by energizing the flat coil 5e.
第３図は本発明の第２の実施例を示す。図において、８
ａ、 ８ｂはベース７に一体的に固定されたガイドレー
ルであって、可動部５の駆動機構系を構成する直線駆動
電動機（ボイスコイルモータ）の磁気回路の一部として
利用するために、第１図に示した円柱形状と異なり、台
形状テーパー面の断面を有し、その子−バー面を対向せ
しめて精度よく平行配置した直線状のガイドレールであ
って、磁性材料に硬質クロムメツキ処理等の耐摩耗表面
処理を施した部材で形成されている。このガイドレール
上を第１図の場合と同じく、２個の玉軸受を直交させて
構成した複数の軸受５ｃに支持された可動部５が従動移
動する。FIG. 3 shows a second embodiment of the invention. In the figure, 8
Reference numerals a and 8b denote guide rails integrally fixed to the base 7, which are used as part of the magnetic circuit of the linear drive motor (voice coil motor) constituting the drive mechanism system of the movable part 5. Unlike the cylindrical shape shown in Figure 1, this is a linear guide rail that has a trapezoidal tapered cross section and is precisely arranged in parallel with its bar surfaces facing each other. It is made of a material that has been subjected to wear-resistant surface treatment. As in the case of FIG. 1, the movable portion 5 supported by a plurality of bearings 5c formed of two ball bearings arranged perpendicularly moves on this guide rail.
また、この台形状ガイドレール８ａ、 ８ｂの各外面側
は、図示するようにコの字形の継鉄１３ａ、 １３ｂの
内側に接着した永久磁石１４ａ、１４ｂにそれぞれ対向
して磁気空隙ｇ＋＋ｇｚを形成する。この磁気空隙を利
用して可動部５に固定された２つのコイル５ｆ、 ５ｇ
をガイドレール８ａ、 ８ｂを非接触状態に貫通するよ
うに配設し、２つのコイル５ｆ、 ５ｇに通電すること
により可動部５を移動させるための直線駆動電動機を構
成することができる。Further, the outer surfaces of the trapezoidal guide rails 8a and 8b respectively face permanent magnets 14a and 14b bonded to the insides of the U-shaped yokes 13a and 13b, forming magnetic gaps g++gz, as shown in the figure. . Two coils 5f and 5g are fixed to the movable part 5 using this magnetic gap.
A linear drive motor for moving the movable part 5 can be constructed by disposing the guide rails 8a and 8b so as to penetrate the guide rails 8a and 8b in a non-contact state and energizing the two coils 5f and 5g.
さらに、主光学系画定部４も台形状ガイドレール８ａ、
８ｂを位置決めの基準として各延長上に精度良く固定
されている。この実施例でも構造の基本的な部分がガイ
ドレールで構成されており、剛性も大きく、また温度上
昇による変形の可能性も少ない。Furthermore, the main optical system defining section 4 also includes a trapezoidal guide rail 8a,
8b as a reference for positioning and is fixed on each extension with high precision. In this embodiment as well, the basic part of the structure is made up of guide rails, which have high rigidity and are less likely to deform due to temperature rise.
以上の説明から明らかなように本発明によれば、小型、
高剛性で温度上昇による各構成部品の熱膨張による光軸
の狂いを抑制可能な光学ヘッドを含む光ディスク装置が
実現するという効果がある。As is clear from the above description, according to the present invention, small size,
This has the effect of realizing an optical disk device including an optical head that is highly rigid and can suppress misalignment of the optical axis due to thermal expansion of each component due to temperature rise.
５ｂｊ９ｋ＞ズ5bj9k>zu
第１図は本発明の第１の実施例、
第２図は第１図における可動部の駆動機構の斜視図、
第３図は本発明の第２の実施例、
第４図は従来の分離型光学ヘッドを含む光ディスク装置
の要部斜視図を示す。
不発ロバｍｌしｄ予肉
第１図
第１図と第３図において、２はスピンドル、４は主光学
系固定部、５は可動部、７はベース、８ａと８ｂはガイ
ドレールをそれぞれ示す。
旦ｙ
第２図
旦吋ｔ７弊Fig. 1 is a first embodiment of the present invention, Fig. 2 is a perspective view of the drive mechanism of the movable part in Fig. 1, Fig. 3 is a second embodiment of the present invention, and Fig. 4 is a conventional separation method. 1 shows a perspective view of essential parts of an optical disc device including a type optical head. In FIGS. 1 and 3, 2 is a spindle, 4 is a main optical system fixed part, 5 is a movable part, 7 is a base, and 8a and 8b are guide rails, respectively. Dany Figure 2 Dangu t7 Wei
Claims (2)
４）と光点駆動機構系を有する可動部（５）とを分離し
、前記両部を可変長光路により結合してなる分離型光学
ヘッドを含む光ディスク装置において、直線状に平行配
置されたガイドレール（８ａ、８ｂ）の一端側にスピン
ドル（２）を軸支したベース（７）を固定し、他端側に
は前記ガイドレール（８ａ、８ｂ）を位置決めの基準と
して前記主光学系固定部（４）を固定し、前記ガイドレ
ールの中間部を前記可動部（５）の移動案内用として機
能させたことを特徴とする分離型光学ヘッド。(1) Main optical system fixing part (with optical detection system including light source)
4) and a movable part (5) having a light spot driving mechanism system are separated from each other, and the two parts are connected by a variable length optical path. A base (7) that pivotally supports a spindle (2) is fixed to one end of the rail (8a, 8b), and the main optical system fixing part is fixed to the other end using the guide rail (8a, 8b) as a positioning reference. (4) is fixed, and the intermediate part of the guide rail functions as a movement guide for the movable part (5).
５）の駆動機構系を構成する直線駆動電動機の磁気回路
の一部として構成したことを特徴とする請求項１記載の
光ディスク装置。(2) Connect the guide rails (8a, 8b) to the movable part (
5. The optical disk device according to claim 1, wherein the optical disc device is configured as a part of a magnetic circuit of a linear drive motor constituting the drive mechanism system of item 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11349490A JPH0411327A (en) | 1990-04-27 | 1990-04-27 | Optical disk device including separate optical head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11349490A JPH0411327A (en) | 1990-04-27 | 1990-04-27 | Optical disk device including separate optical head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0411327A true JPH0411327A (en) | 1992-01-16 |
Family
ID=14613738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11349490A Pending JPH0411327A (en) | 1990-04-27 | 1990-04-27 | Optical disk device including separate optical head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04255926A (en) * | 1991-02-07 | 1992-09-10 | Mitsubishi Electric Corp | Optical head |
-
1990
- 1990-04-27 JP JP11349490A patent/JPH0411327A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04255926A (en) * | 1991-02-07 | 1992-09-10 | Mitsubishi Electric Corp | Optical head |
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