JPS58175144A - Optical head - Google Patents
Optical headInfo
- Publication number
- JPS58175144A JPS58175144A JP5619282A JP5619282A JPS58175144A JP S58175144 A JPS58175144 A JP S58175144A JP 5619282 A JP5619282 A JP 5619282A JP 5619282 A JP5619282 A JP 5619282A JP S58175144 A JPS58175144 A JP S58175144A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical head
- housing
- head
- track access
- 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
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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
る九字的情報記憶装置用元学ヘッドに関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an original head for a Kuji information storage device.
元情報の記録・再生には、元ビームの焦点をゝ記録面上
に、結ばせるとともにトラックに追従させるというフォ
ーカス制御とトラック制御の機能が必要である。この２
つの制御機能を鳴し、多層、ディスク構成の光学的情報
記憶装置への適用の可能性を有する薄型、小型、軽量な
光学ヘッドとして、第１図に示す構成のものがすでに提
案されている。Recording and reproducing original information requires focus control and track control functions to focus the original beam on the recording surface and follow the track. This 2
An optical head having the structure shown in FIG. 1 has already been proposed as a thin, compact, and lightweight optical head that has two control functions and has the possibility of being applied to an optical information storage device with a multilayer disk structure.
第１図において、１０は光学ヘッド本体、１１はその一
側部に透孔１ ｆａｔ有する中空角柱形状の光学ヘッド
本体１ｏの筐体、１２は平行な元ビームを光記録用ディ
スクＡの記録面上に集束させる集束レンズ、１３は集束
レンズ１２ｉ上部に保持し下部に電磁コイル部１４を備
えた円筒形状の可動体で、その側部に前記透孔１１ａ・
と対応する透孔１３ａ、１３ｂ２有する。１５゜１６は
可動体１３を筐体１１内にてフォーカス制御方向のみに
変位可能に支持するダンノξ−１１７は筐体１１下部に
取付けられた磁石で、上記電磁コイル部１４とともに可
動体１３をフォーカス制御方向に駆動する第１の駆動装
置ｔｔ−構成する。１８は光路転換器（ミラー）で、筐
体１１の透孔１１ａの反対側内壁力・ら透孔１３ｂを通
って可動体１３内に突出したアームｌｌｂによって支持
される。該ミラー１８は、透孔１１ａ及び透孔１３ 、
ａ ｆ通して可動体１３内に入射したディスク面と平行
なトラックアクセス方向の元ビームの光路を、ディスク
面に垂直な方向に転換し、集束レンズ１２の中心部を通
してディスクＡに該光ビームを導く如くなっている。In FIG. 1, 10 is an optical head main body, 11 is a housing of a hollow prismatic optical head main body 1o having a through hole 1 fat on one side thereof, and 12 is a housing for directing a parallel original beam to the recording surface of an optical recording disk A. The focusing lens 13 that focuses the light upward is a cylindrical movable body that is held above the focusing lens 12i and has an electromagnetic coil section 14 at the bottom.
It has corresponding through holes 13a and 13b2. 15 and 16 support the movable body 13 in the housing 11 so that it can be displaced only in the focus control direction.Danno ξ-117 is a magnet attached to the lower part of the housing 11, which supports the movable body 13 together with the electromagnetic coil section 14. A first drive device tt for driving in the focus control direction is configured. Reference numeral 18 denotes an optical path changer (mirror), which is supported by an arm llb that protrudes into the movable body 13 from the inner wall of the housing 11 on the opposite side of the through hole 11a through the through hole 13b. The mirror 18 has a through hole 11a and a through hole 13,
The optical path of the original beam in the track access direction parallel to the disk surface, which entered the movable body 13 through a f, is changed to a direction perpendicular to the disk surface, and the optical beam is directed to the disk A through the center of the focusing lens 12. It's like it's guiding you.
１９は筐体１１の透孔１１ａと反対側の外壁に＠り付け
られた電磁コイル部である。Reference numeral 19 denotes an electromagnetic coil portion attached to the outer wall of the housing 11 on the opposite side to the through hole 11a.
２０は上記の如く構成された光字ヘッド本体１０を収容
する中空矩形状のヘッド外筐で、集束レンズ１２と対応
する位置に透孔２０ ａ２に有する。２１はヘッド外筐
２０の側壁２０ｂに取付けられた磁石であり、該磁石２
１は上記！磁コイル部１９とともに光学ヘッド本体１０
’Ｔｈトラツク制御方向に駆動する第２の駆動装置を構
成する。３０は支持構造体、例えばゴムバネで、その一
端部全筐体１１の上面１１ｃ及び下面ｌｌｂに、また他
端部をヘッド外筐２ｏの上板内壁２０ｃ及び下板内壁２
０ｄにそれぞれ固定し、これによりヘッド外筐２０内に
て光学ヘッド本体１０を −トラックア
クセス方向（図に向って左右方向）に移動し得る如く支
持する様になっている。なお、Ｂはヘッド光学系である
。Reference numeral 20 designates a hollow rectangular head outer casing that accommodates the optical head main body 10 configured as described above, and has a through hole 20a2 at a position corresponding to the focusing lens 12. 21 is a magnet attached to the side wall 20b of the head outer casing 20;
1 is above! Optical head main body 10 together with magnetic coil section 19
'Th A second drive device is configured to drive in the track control direction. Reference numeral 30 denotes a support structure, for example a rubber spring, whose one end is attached to the upper surface 11c and lower surface llb of the entire housing 11, and the other end is attached to the upper inner wall 20c and lower inner wall 2 of the head outer casing 2o.
0d, so that the optical head main body 10 is supported within the head outer casing 20 so as to be movable in the -track access direction (left/right direction in the drawing). Note that B is a head optical system.
上記の如き構成において、図示しないヘッドポジショナ
によりヘッド外筐２０がディスクＡの所定位置にト・ラ
ックアクセスされ、更ニヘッド元学系ＢよジディスクＡ
への記録または再生用の平行表光ビームが出射されると
、該九ビームは光学ヘッド本体ｌＯの筐体１１の透孔１
１ａ及び可動体１３の透孔１３ａｅ通して可動体１３内
に入射し、ミラー１８にて直角に反射され集束レンズ１
２の中心部を通ってディスクＡの記録面上に集束される
。ここでフォーカス制御は、図示しない制御回路よりフ
ォーカス制御用信号が電磁コイル部１４に流れ、該電磁
コイル部１４と磁石１７との磁力作用によ！ｌｌ司動体
１３がグンパー１５．１６’に介して光字ヘッド本体１
０の筐体１１に対して図に向って上下動することによっ
て行なわれる。一方、微小なトラックアクセス方向の制
御は、制御回路よりのトラック制御用信号が電磁コイル
部１９に流れ、磁石２１と該電磁コイル部１９との磁力
作用により光学ヘッド本体１０がゴムバネ３０を介して
ヘッド外筐２０に対してトラックアクセス方向に変位す
ることによってたされる。In the above configuration, the head outer casing 20 is track accessed to a predetermined position on the disk A by a head positioner (not shown), and the head is moved from the original system B to the disk A.
When a parallel light beam for recording or reproduction is emitted, the nine beams enter the through hole 1 of the casing 11 of the optical head body IO.
1a and enters the movable body 13 through the through hole 13ae of the movable body 13, is reflected at a right angle by the mirror 18, and is reflected by the focusing lens 1.
2 and is focused onto the recording surface of disk A. Here, the focus control is performed by a focus control signal flowing to the electromagnetic coil section 14 from a control circuit (not shown), and by the magnetic force between the electromagnetic coil section 14 and the magnet 17! ll The driving body 13 connects the optical head body 1 via the gunper 15.16'.
This is done by moving the housing 11 of No. 0 up and down in the direction shown in the figure. On the other hand, to control the minute track access direction, a track control signal from the control circuit flows to the electromagnetic coil section 19, and the optical head main body 10 is moved via the rubber spring 30 by the magnetic force between the magnet 21 and the electromagnetic coil section 19. This is achieved by displacing the head in the track access direction relative to the head outer casing 20.
上記の如き光学ヘッドは、前述の如く薄型。The above optical head is thin as described above.
小型、軽量であるという利点を有するものの、次に述べ
る如き問題点があった。すガわち、光学ヘッド本体１０
の筐体１１の支持機構としてゴムバネ３０を用い、ゴム
の弾性変形を利用して筐体１１を左右方向に動ρ・して
いるため、筐体１１が左右方向以外にも容易に動く。こ
のため、ディスクＡからの反射光により、フォーカス制
御、トラック制御用の信号を安定に検出することが難し
い。また、ポジショナアクセス時チなどに制御不能の振
動が発生し応答性の高い装置を実現することが困難であ
る。Although it has the advantage of being small and lightweight, it has the following problems. Well, optical head body 10
A rubber spring 30 is used as a support mechanism for the housing 11, and the elastic deformation of the rubber is used to move the housing 11 in the left-right direction. Therefore, the housing 11 can easily move in addition to the left-right direction. Therefore, it is difficult to stably detect signals for focus control and track control due to the reflected light from the disk A. Furthermore, uncontrollable vibrations occur when the positioner is accessed, making it difficult to realize an apparatus with high responsiveness.
このような困難性を解決するため、上記の如をゴムバネ
３０に替えて、金属の板バネを用いる試みがなされた。In order to solve this difficulty, an attempt was made to use a metal plate spring instead of the rubber spring 30 as described above.
この金属の板バネを用いた支持機構では、金属のねじれ
変形、あるいは、たわみ変形を利用して、筐体１１を左
右方向に動かｔもので、これによればバネの左右方向の
剛性に比べ、左右方向以外の剛性を充分大きくすること
ができるため、筐体１１は左右方向にのみ安定に動くこ
とが可能と方る。しかしながら、かかる金属の板バネは
ゴムバネと異なり、ある周波数になるとバネの面が一体
として振動せずに分割して各々が勝手に振動する、局部
共振という現象が現われるため、ビデオ信号を実時間で
記録・再生可能とするよう力高いトラック制御性能を得
ることが困難であった。In this support mechanism using a metal leaf spring, the casing 11 is moved in the left-right direction by utilizing torsional deformation or flexural deformation of the metal, and according to this, the rigidity of the spring in the left-right direction is Since the rigidity in directions other than the left and right directions can be sufficiently increased, the housing 11 can stably move only in the left and right directions. However, unlike rubber springs, such metal leaf springs exhibit a phenomenon called local resonance in which, at a certain frequency, the spring surfaces do not vibrate as a unit, but instead separate and vibrate on their own, which is called local resonance. It has been difficult to obtain strong track control performance to enable recording and reproduction.
ところで、光学ヘッドのトラック制御機構としては、第
１図に示ｔ−４のの他に集束レンズ１２のみをゴムバネ
や金属の仮バネによって支持し、左右方向に駆動可能と
する構造のものもある。By the way, as a track control mechanism for an optical head, in addition to the t-4 shown in FIG. 1, there is also a structure in which only the focusing lens 12 is supported by a rubber spring or a temporary metal spring, and can be driven in the left and right directions. .
これらのものも、ポジショナアクセス時などに制御不能
な振動が生じたり、制御は原理的に可能であっても制御
信号検出が極めて困難であるという欠点があった。また
、光学系の構成条件が厳しく、複雑になるという欠点も
あった、これに対して、第１図に示す光字ヘッドでは筐
体１１が左右方向のみに安定に平行移動できれば、入射
光はミラー１８により直角に偏光され、その反射光の集
束レンズ照射位置に変化が生じないので、光学系の構成
条件をゆるやかにすることができる。このため、かかる
光字ヘッドにお、ける上記の如き問題点の改善が強く要
望された。These devices also have drawbacks in that uncontrollable vibrations occur when the positioner is accessed, and even if control is possible in principle, it is extremely difficult to detect a control signal. In addition, there was also the drawback that the optical system had to be constructed under strict and complicated conditions.On the other hand, in the optical head shown in FIG. Since the light is polarized at right angles by the mirror 18 and there is no change in the irradiation position of the reflected light to the focusing lens, the configuration conditions of the optical system can be relaxed. Therefore, there has been a strong demand for improvement of the above-mentioned problems in such optical heads.
そこで、本発明者は穐々の角度から研究、実験を重ねた
結果、平面的彦広がりを有する複数のバネ要素をそのバ
ネ面が同一平面上に位置する如く円盤状に互いに結合し
かつその中心部と外周部との間に複数の空間部を形成し
てなるバネ（これを本明細書においてはダイヤフラムバ
ネと定義する）が、不要ｌ振動要因を持たず一方向のみ
に安定疫バネ性金有すること全見出し飢
本発明は光学ヘッド本体のトラックアクセス方向への可
動筐体の支持機構として、上記ダイヤフラムバネを用い
たことを特徴とし、その目的は不要な振動要因を抑え、
高速、高精度なトランク制御が可能で、薄型、小型、軽
量な光学ヘッドを提供することにある。以下本発明を図
面について説明する。Therefore, as a result of repeated research and experiments from various angles, the inventor of the present invention connected a plurality of spring elements having a planar spread to each other in a disk shape such that their spring surfaces are located on the same plane, and the center of the A spring formed by forming a plurality of spaces between a part and an outer circumferential part (this is defined as a diaphragm spring in this specification) has no unnecessary vibration factors and is stable in only one direction. The present invention is characterized in that the above diaphragm spring is used as a support mechanism for the movable housing of the optical head main body in the track access direction, and its purpose is to suppress unnecessary vibration factors,
The objective is to provide a thin, compact, and lightweight optical head that is capable of high-speed, high-precision trunk control. The present invention will be explained below with reference to the drawings.
第２図乃至第５図は本発明の第１の実施例を示すもので
、図中前述した第１図に示す光学ヘッドと同一構成部分
は同一符号をもって表わす。2 to 5 show a first embodiment of the present invention, and in the drawings, the same components as those of the optical head shown in FIG. 1 described above are denoted by the same reference numerals.
す力ゎち、１０は光字ヘッド本体、１１はその一側部に
透孔１１ａを有する中空角柱形状の光字ヘッド本体１０
の筐体、１２は平行す元ビームを図示しない元記録用デ
ィスクの記録面上に集束させる集束レンズ、１３は集束
レンズ１２を上部に保持し下部に電磁コイル部１４’に
備えた円筒形状の可動体で、その側部に前記透孔１１ａ
と対応する透孔１３ ａ ＋ １３ ｂ ’Ｆｃ有する
。１５゜１６は可動体１３を筐体１１内にてフォーカス
制御方向のみに変位可能に支持するダンパー、１７は筐
体１１下部に取付けられた磁石で、上記電磁コイル部１
４とともに可動体１３をフォーカス制御方向に駆動する
第１の駆動装置全構成する。１８は光路転換器（ミラー
ンで、筐体１１の透孔１１ａの反対側内壁から透孔１３
ｂを通って可動体１３内に突出したアームｌｌｂによっ
て支持８．される。該ミラー１８は、透孔１１ａ及び透
孔１３ａｔ通して可動体１３内に入射したディスク面と
平行なトラックアクセス方向の元ビームの光路を、ディ
スク面に垂直外方向に転換し、集束レンズ１２の中心部
を通してディスクに該光ビームを導く如くムつている。10 is an optical head main body, 11 is a hollow prismatic optical head main body 10 having a through hole 11a on one side thereof.
12 is a focusing lens that focuses the parallel original beam onto the recording surface of the original recording disk (not shown); 13 is a cylindrical housing that holds the focusing lens 12 in the upper part and has an electromagnetic coil part 14' in the lower part; The movable body has the through hole 11a on its side.
It has corresponding through holes 13a + 13b'Fc. 15 and 16 are dampers that support the movable body 13 so that it can be displaced only in the focus control direction within the housing 11; 17 is a magnet attached to the lower part of the housing 11;
4 and a first drive device that drives the movable body 13 in the focus control direction. 18 is an optical path changer (mirror), which connects the through hole 13 from the inner wall on the opposite side of the through hole 11a of the housing 11.
Supported by an arm llb projecting into the movable body 13 through b.8. be done. The mirror 18 converts the optical path of the original beam in the track access direction parallel to the disk surface, which has entered the movable body 13 through the through hole 11a and the through hole 13at, to an outward direction perpendicular to the disk surface. It is designed to direct the light beam to the disk through the center.
１９は筐体１１のアームｌｌｂと反対側突部ｌｉｅに取
ジ付けられた電磁コイル部である。Reference numeral 19 denotes an electromagnetic coil portion attached to a protrusion lie on the opposite side of the arm llb of the housing 11.
２０は上記の如く構成された光学ヘッド本体１０に収容
する中空矩形状のヘッド外筐で、集束レンズ１２と対応
する位置に透孔２０ａｋ有する。２１はヘッド外筐２０
の側壁２０ｂに取付けられた磁石であり、該磁石２１は
上記電磁コイル部１９とともに光学ヘッド本体１０ｔ−
１−ラック制御方向に駆動する第２の駆動装置を構成す
る。Reference numeral 20 designates a hollow rectangular head outer casing that is accommodated in the optical head main body 10 configured as described above, and has a through hole 20ak at a position corresponding to the focusing lens 12. 21 is the head outer casing 20
The magnet 21 is attached to the side wall 20b of the optical head main body 10t along with the electromagnetic coil section 19.
1- constitute a second drive device that drives in the rack control direction;
４０は本発明の特徴とする、可動筐体１１の支持機構と
してのダイヤ７ラムパネであり、例えば第５図（ａ）
（ｂ）に示すツクターンの如く平面的カムがりを有する
複数のバネ要素４０ａをそのバネ面が同一平面上に位置
する如く円盤状に互いに結合しかつその中心部と外周部
との間に複数の空間部４０ｂｋ形成してなる。このダイ
ヤフラムバネ４０は金属、例えばりん青銅を材質とし、
４０〜７０ミクロンの厚みを有し、表面にゴムが薄く塗
布されている。ダイヤフラムバネ４０は、ディスク面と
平行なトラックアクセス方向の元ビームを中心軸として
筐体１１の両側に配置され、その中心部１に筐体１１の
突部１１ｃ。40 is a diamond 7 lamp panel as a support mechanism for the movable housing 11, which is a feature of the present invention; for example, as shown in FIG. 5(a).
A plurality of spring elements 40a having a planar cam as shown in FIG. A space portion 40bk is formed. This diaphragm spring 40 is made of metal, for example, phosphor bronze,
It has a thickness of 40 to 70 microns and has a thin layer of rubber coated on its surface. The diaphragm springs 40 are arranged on both sides of the casing 11 with the original beam in the track access direction parallel to the disk surface as the central axis, and the protrusion 11c of the casing 11 is located at the center 1 of the diaphragm springs 40.
突起１１ｆに、また外周部をヘッド外筐２０の内壁に取
付けた枠体５０にそれぞれ固定し、これにより筐体１１
をトラックアクセス方向への変位のみを可能とするよう
支持する。The housing 11 is fixed to the protrusion 11f and to the frame 50 whose outer peripheral portion is attached to the inner wall of the head outer housing 20.
is supported to allow displacement only in the track access direction.
上記の如き構成において、フォーカス制御。Focus control in the above configuration.
トラックアクセス制御については第１図に示す光学ヘッ
ドにおけるそれと全く同様なので七〇説明を省略するが
、ダイヤフラムバネ４０は前述の如く取付けられた状態
でその中心部及び外周部が固定端となり、自由端を有し
てい兵−ので、局部共振のない良好４バネ周波数特性を
得ることができ、筐体１１の高速なトラック制御が可能
となる。また、ダイヤフラムバネ４０にバネ面に垂直の
方向の剛性に比べ、半径方向の剛性が充分に大きいため
、筐体１１が駆動方向以外の方向に変位するのを抑える
ことができる。The track access control is exactly the same as that in the optical head shown in FIG. Therefore, it is possible to obtain good four-spring frequency characteristics without local resonance, and high-speed track control of the housing 11 is possible. Furthermore, since the diaphragm spring 40 has sufficiently greater rigidity in the radial direction than the rigidity in the direction perpendicular to the spring surface, displacement of the housing 11 in directions other than the driving direction can be suppressed.
筐体１１の高さは集束レンズ１２を含むフォーカス制御
機構部で決定されるが、上述の如く筐体１１の支持をそ
の両側面で行えば、支持機構によって光字ヘッド全体の
高さが高くなる要因がなくなるので、第１図に示すもの
に比べてより薄型の光学ヘッドを実現でき、多層ディス
ク用として好適な光字ヘッドを提供できる。The height of the housing 11 is determined by the focus control mechanism including the focusing lens 12, but if the housing 11 is supported on both sides as described above, the height of the entire optical head is increased by the support mechanism. Since this factor is eliminated, it is possible to realize an optical head that is thinner than that shown in FIG. 1, and it is possible to provide an optical head suitable for use in multilayer discs.
第６図乃至第８図は第２の実施例を示すものである。こ
の実施例は筐体ＬＬ’に２軸４枚のダイヤフラムバネ４
０で支持するようにしたものである。す力わち、ｌ１ｇ
はヘッド光学系刀・らの元ビームの元軸の両側の対称位
置の筐体外面に設けた支軸で、各ダイヤプラム４ｏの中
心部は上記支＠ｌ１ｇに、また、外周部はヘッド外筐２
０の内壁に取付けた枠体５ｏにそれぞれ固定する。この
実施例によれば、ディスク面に垂直表軸とヘッド光学系
からの光ビームの元軸のまわりの回転変位を抑える効果
が特に大きい。FIGS. 6 to 8 show a second embodiment. This embodiment has four diaphragm springs 4 on two axes in the housing LL'.
It is supported by 0. Power, l1g
is a support shaft provided on the outer surface of the housing at a symmetrical position on both sides of the original axis of the original beam of the head optical system. Housing 2
They are each fixed to a frame 5o attached to the inner wall of 0. According to this embodiment, the effect of suppressing rotational displacement around the table axis perpendicular to the disk surface and the original axis of the light beam from the head optical system is particularly great.
その他の構成、効果は第１の実施例と同様である。Other configurations and effects are similar to those of the first embodiment.
第９図及び第１０図は第３の実施例會示すもので、この
実施例は第２の実施例と同様の支軸１１ｇを元ビームの
元軸を中心として対称となるように筐体１１の片側宛４
軸設け、４軸８枚のダイヤフラムバネ４０で筐体ｌｌを
支持するようにしたものである。この実施例によれは、
第２の実施例に比べ、元軸まわりの回転変位を抑える効
果がより大きい。その他の構成、効果は第１の実施例と
同様である。9 and 10 show a third embodiment, in which the housing 11 is symmetrically centered around the original axis of the original beam about the support shaft 11g similar to the second embodiment. 4 to one side
The housing 1 is supported by four shafts and eight diaphragm springs 40. According to this example,
Compared to the second embodiment, the effect of suppressing rotational displacement around the original axis is greater. Other configurations and effects are similar to those of the first embodiment.
第１１図乃至第１３図は第４の実施例を示すものである
。この実施例は、筐体１１の一側面 ′を第１の実施例
におけると同様の構成により一枚のダイヤフラムバネ４
０で、また他側面を第２の実施例におけると同様の構成
により２枚のダイヤフラムバネでそれぞれ筐体ｌｌを支
持するようにしたものである。この実施例によれば、第
２及び第３の実施例に比較して、光軸まわりの回転変位
を極力抑えながら筐体１１を支持するダイヤフラムバネ
４０の枚数を減らすことができる。しかも、駆動方向の
剛性を低くすることができるため、トラック制御に要求
される駆動装置の性能を低く設定することが可能となる
。11 to 13 show a fourth embodiment. In this embodiment, one side ′ of the housing 11 is constructed with a single diaphragm spring 4 having the same structure as in the first embodiment.
0, and the other side has the same structure as in the second embodiment, with two diaphragm springs each supporting the housing 11. According to this embodiment, compared to the second and third embodiments, it is possible to reduce the number of diaphragm springs 40 that support the housing 11 while minimizing rotational displacement around the optical axis. Furthermore, since the rigidity in the drive direction can be lowered, the performance of the drive device required for track control can be set lower.
その他の構成、効果は第１の実施例と同様である。Other configurations and effects are similar to those of the first embodiment.
以上説明した如く本発明によれば、光字ヘッドのトラッ
クアクセス方向の可動筐体ヲ、トラックアクセス方向へ
変位するようダイヤフラムバネで支持したので、局部共
碌のない良好なパネ周波数特性を得ることかでき、しか
も駆動方向以外、への変位を抑えることができ、したが
って、高速、高精度なトラック制御が可能であり、高性
能な光学的情報記憶装置が実現できる。As explained above, according to the present invention, since the movable housing of the optical head in the track access direction is supported by a diaphragm spring so as to be displaced in the track access direction, it is possible to obtain good panel frequency characteristics without local distortion. Moreover, displacement in directions other than the driving direction can be suppressed, and therefore high-speed and highly accurate track control is possible, and a high-performance optical information storage device can be realized.
、 図面は本発明の説明に供するもので、第１図はすで
に提案された光学ヘッドの縦断正面図、第２図乃至第５
図は本発明の第１の実施例を示すもので、第２図は本発
明に係る光学ヘッドの横断平面図、第３図は第２図１−
１線矢視方向の縦断正面図、第４図は第２図ＩＶ−ｍＶ
線矢視方向の縦断側面図、第５図（ａ）（ｂ）はダイヤ
フラムバネの、ｏターン例を示す平面図、第６図乃至第
８図は本発明の第２の実施例を示すもので、第６図は光
学ヘッドの横断平面図、第７図は第９図Ｘ−Ｘ線矢視方
向の縦断正面図、第８図は第９図Ｘ−Ｘ線矢視方向の縦
断側面図、第９図及び第１０図は本発萌の第３の実施例
を示すもので、゛第９図は光学ヘッドの横断平面図、第
ｉｏ図は第９図Ｘ−Ｘ線矢視方向の縦断側面図、第１１
図乃至第１３図は本発明の第４の実施例を示すもので、
第１１図は光学ヘッドの横断平面図、第１２図は第１１
図刈−ＸＩｌ線矢視方向の縦断側面図、第１３図は第１
１図店−ｘｍ線矢視方向の縦断側面図である。
１０・・・光学ヘッド本体、１１・・・トラックアク転
換器、２０・・・ヘッド外筐、４０・・・ダイヤフラム
バネ。
特許出願人 日本電信電話公社
代理人 弁理士 吉 １） 精 孝第４図
（ｂ）
１１ｅ１１
手 続 補 正 書（自発）
昭和５７年６月２２日
特許庁長官 着 林 和 夫 殿
１事件の表示
昭和５７年 特許願 第５６１９２号
２発明の名称
光学ヘッド
３補正をする者
事件との関係 特許出願人
住 所 東京都千代田区内幸町１１目１番６号名 称
（４２２） 日本電信電話公社代表者 真 藤
恒
４代 理 人 〒１０５電（０３） ５０８−９８６６
住 所 東京都港区虎ノ門２１目７番９号第１岡名ビル
「明細書の特許請求の範囲、及び発明の詳細な説明の欄
」
６補正の内容
別紙のとおり
６補正の内容
（１） 特許請求の範囲を別紙のとおシ補正する。
（２）明細書の第４頁末行目のｒｂＪをｒｄＪと補正す
る。
（３）明細書の第１０頁１４行目の「側」と「突」との
間に「の」を加入する。
（４）第１３頁１９行目の「光軸」を「筐体１１の３軸
、即ちトラックアクセス方向の軸、フォーカス制御方向
の軸、並びに前記２軸に直交する軸」と補正する。
（５）明細書の第１４頁７行目の「、ネ」と「で」との
間に「４０」を加入し、同頁９行目の「光軸」を「前述
した筐体１１の３−」と補正する。
〈補正 特許請求の範囲〉
（１） 光記録用ディスク面と平行なトラックアクセ
ス方向の光ビームの光路をディスク面に垂直な方向に転
換するミラー等の光路転換器と二該垂直方向の光ビーム
をディスクの記録面に不集束させる集束レンズを保持し
４−カス制御方向のみに変位可能に支持された可動体を
備えた光学ヘッド本体と、該光学ヘッド本体をトラック
アクセス方向に移動し得る如く収容したヘッド外筐とよ
シなる光学ヘッドにおいて、該光学ヘッド本体の筐体を
、該光ビームを中心軸とし該筐体を挾むように配置され
た複数のダイヤフラムバネにより該ヘッド外筐に支持さ
せたことを特徴とする光学ヘッド。
（２）光記録用ディスク面と平行なトラックアクセス方
向の光ビームの光路をディスク面に垂直な方向に転換す
るミラー等の光路転換器と、該垂直方向の光ビームをデ
ィスクの記録面にて集束させる集束レンズを保持しフォ
ーカス制御方向のみに変位可能に支持された可動体を備
えた光学ヘッド本体と、該光学ヘッド本体をトラックア
クセス方向に移動し得る如く収容したヘッド外筐とよシ
なる光学ヘッドにおいて、該光学ヘッド本体の筐体を、
光ビームにザ行で該光ビームの光軸を含むデ１スク面に
垂直な面を間に挾むように配置された少なくとも２本の
軸線を中心軸とし該筐体を挾むように配置された複数の
ダイヤフラムバネによシ該ヘッド外筐に支持させたこと
を特徴とする光学ヘッド。The drawings are for explaining the present invention, and FIG. 1 is a longitudinal sectional front view of an optical head that has already been proposed, and FIGS.
The figures show a first embodiment of the present invention, FIG. 2 is a cross-sectional plan view of an optical head according to the present invention, and FIG.
Vertical front view in the direction of arrow 1, Figure 4 is Figure 2 IV-mV
5(a) and 5(b) are plan views showing an O-turn example of a diaphragm spring; FIGS. 6 to 8 show a second embodiment of the present invention; FIG. 6 is a cross-sectional plan view of the optical head, FIG. 7 is a vertical cross-sectional front view taken along the line X--X in FIG. 9, and FIG. 8 is a vertical cross-sectional side view taken along the line X--X in FIG. , FIG. 9 and FIG. 10 show a third embodiment of the present invention, in which FIG. 9 is a cross-sectional plan view of the optical head, and FIG. Longitudinal side view, 11th
Figures 13 to 13 show a fourth embodiment of the present invention.
FIG. 11 is a cross-sectional plan view of the optical head, and FIG. 12 is a cross-sectional plan view of the optical head.
Fig. 13 is a longitudinal cross-sectional side view in the direction of the arrow XI1.
FIG. 1 is a longitudinal cross-sectional side view taken in the direction of the arrows along the line X-M in FIG. DESCRIPTION OF SYMBOLS 10... Optical head main body, 11... Track ac converter, 20... Head outer casing, 40... Diaphragm spring. Patent Applicant Nippon Telegraph and Telephone Public Corporation Agent Patent Attorney Yoshi 1) Seitaka Figure 4 (b) 11e11 Procedure Amendment (Spontaneous) Arrived June 22, 1980 by the Commissioner of the Patent Office Kazuo Hayashi Indication of Case 1 1981 Patent Application No. 56192 2 Name of the invention 3 Relationship to the case of person who corrects optical head 3 Patent applicant address 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Name Name
(422) Shinfuji, Representative of Nippon Telegraph and Telephone Public Corporation
Tsune 4th Director Masato 105 Telephone (03) 508-9866
Address No. 1 Okana Building, 21-7-9 Toranomon, Minato-ku, Tokyo "Column for claims and detailed explanation of the invention" Contents of 6 amendments Contents of 6 amendments (1) as shown in the attached sheet Amend the claims in a separate sheet. (2) Correct rbJ on the last line of the fourth page of the specification to rdJ. (3) Add "no" between "side" and "tsu" on page 10, line 14 of the specification. (4) "Optical axis" on page 13, line 19 is corrected to "three axes of the housing 11, that is, the axis in the track access direction, the axis in the focus control direction, and the axis perpendicular to the above two axes." (5) Add ``40'' between ``, ne'' and ``de'' on the 7th line of page 14 of the specification, and change the ``optical axis'' on the 9th line of the same page to ``the above-mentioned casing 11.'' 3-” is corrected. <Amended Claims> (1) An optical path converter such as a mirror that changes the optical path of a light beam in a track access direction parallel to the optical recording disk surface to a direction perpendicular to the disk surface; an optical head main body including a movable body that holds a focusing lens for defocusing the light onto the recording surface of the disk and is supported so as to be displaceable only in the 4-track control direction; In an optical head different from the head outer casing, the casing of the optical head main body is supported by the head outer casing by a plurality of diaphragm springs arranged to sandwich the casing with the light beam as a central axis. An optical head characterized by: (2) An optical path converter such as a mirror that converts the optical path of a light beam in the track access direction parallel to the disk surface for optical recording into a direction perpendicular to the disk surface, and the light beam in the perpendicular direction is directed to the recording surface of the disk. The optical head body includes a movable body that holds a focusing lens to be focused and is supported so as to be displaceable only in the focus control direction, and a head outer casing that accommodates the optical head body so as to be movable in the track access direction. In the optical head, the casing of the optical head main body,
A plurality of axes arranged to sandwich the casing each having a central axis of at least two axes arranged so as to sandwich a plane perpendicular to the disk surface including the optical axis of the light beam in the row of the light beam. An optical head characterized in that the head is supported by a diaphragm spring on an outer casing of the head.
Claims (2)
ス方向の、九ビームの元路？ディスク面に垂直力方向に
転換するミラー等の光路転換器と該垂直方向の元ビーム
をディスクの記録面にて集束させる集束レンズを保持し
フォーカス制御方向のみに変位可能に支持された可動体
を備えた光学ヘッド本体と、該光学ヘッド本体全トラッ
クアクセス方向に移動し得る如く収容したヘッド外筐と
よりなる光学ヘッドにおいて、該光学ヘッド本体の筐体
を該元 ビームを中心軸とし、該筐体を挾むように配置
された複数のダイヤフラムバネにより該ヘッド外筐に支
持させたことを特徴とする光学ヘッド。(1) The original path of the nine beams in the track access direction parallel to the optical recording disk surface? A movable body that holds an optical path changer such as a mirror that changes the force direction perpendicular to the disk surface and a focusing lens that focuses the original beam in the vertical direction on the recording surface of the disk, and is supported so that it can be displaced only in the focus control direction. In an optical head comprising an optical head main body and a head outer casing that accommodates the optical head main body so as to be movable in the entire track access direction, the casing of the optical head main body is set with the original beam as the central axis, An optical head characterized in that the head body is supported by a plurality of diaphragm springs arranged to sandwich the head body.
向の光ビームの光路をディスク面に垂直４方向に転換す
るミラー等の光路転換器と該垂直方向の元ビームをディ
スクの記録面にて集束させる集束レンズを保持しフォー
カス制御方向のみに変位ｎ」能に支持された可動体を備
えた光学ヘッド本体と、該光学ヘッド本体をトラックア
クセス方向に移動し得る如く収容したヘッド外筐とより
なる光字ヘッドにおいて、該光学ヘッドの筐体を、元ビ
ームに平行で該光ビームｏ’＋軸を含むディスク面に垂
直な面を間にはさむように配置された少なくとも２本の
軸線′を中心軸とし該筐体をはさむように配置された複
数のダイヤフラムバネによｐ該ヘッド外筐に支持名せた
ことを特徴とする光学ヘッド。(2) An optical path converter such as a mirror that converts the optical path of a light beam in the track access direction parallel to the disk surface for optical recording into four directions perpendicular to the disk surface, and focuses the original beam in the perpendicular direction on the recording surface of the disk. The optical head body includes a movable body that holds a focusing lens and is supported so as to be movable only in the focus control direction, and a head outer casing that accommodates the optical head body so that it can be moved in the track access direction. In the optical head, the casing of the optical head is centered on at least two axes' parallel to the original beam and perpendicular to the disk surface including the optical beam o'+ axis. An optical head characterized in that the head outer casing is supported by a plurality of diaphragm springs arranged as a shaft so as to sandwich the casing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5619282A JPS58175144A (en) | 1982-04-05 | 1982-04-05 | Optical head |
| US06/468,680 US4571715A (en) | 1982-02-22 | 1983-02-22 | Optical head movable in a tracking direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5619282A JPS58175144A (en) | 1982-04-05 | 1982-04-05 | Optical head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58175144A true JPS58175144A (en) | 1983-10-14 |
Family
ID=13020237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5619282A Pending JPS58175144A (en) | 1982-02-22 | 1982-04-05 | Optical head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58175144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012142016A2 (en) * | 2011-04-13 | 2012-10-18 | Borgwarner Inc. | Friction clutch assemblies |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55142425A (en) * | 1979-04-24 | 1980-11-07 | Olympus Optical Co Ltd | Driving unit of objective lens |
-
1982
- 1982-04-05 JP JP5619282A patent/JPS58175144A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55142425A (en) * | 1979-04-24 | 1980-11-07 | Olympus Optical Co Ltd | Driving unit of objective lens |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012142016A2 (en) * | 2011-04-13 | 2012-10-18 | Borgwarner Inc. | Friction clutch assemblies |
| WO2012142023A2 (en) * | 2011-04-13 | 2012-10-18 | Borgwarner Inc. | Compression spring members |
| WO2012142065A2 (en) * | 2011-04-13 | 2012-10-18 | Borgwarner Inc. | Control systems for friction clutch assemblies |
| WO2012142016A3 (en) * | 2011-04-13 | 2012-12-27 | Borgwarner Inc. | Friction clutch assemblies |
| WO2012142023A3 (en) * | 2011-04-13 | 2013-01-17 | Borgwarner Inc. | Compression spring members |
| WO2012142065A3 (en) * | 2011-04-13 | 2013-03-14 | Borgwarner Inc. | Control systems for friction clutch assemblies |
| US9523393B2 (en) | 2011-04-13 | 2016-12-20 | Borgwarner Inc. | Multi-mode cooling pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS58175144A (en) | Optical head | |
| JPH0514335Y2 (en) | ||
| JPS6124036A (en) | Actuator | |
| JPH026137B2 (en) | ||
| JP3186900B2 (en) | Objective lens drive | |
| JPS58222449A (en) | Actuator of optical disk | |
| JPH0428025A (en) | Objective lens driver | |
| JPH0573938A (en) | Objective lens driving device | |
| JPH05234108A (en) | Objective driving device | |
| JPH04313824A (en) | Lens driver in optical information reader | |
| JP2897090B2 (en) | Objective lens drive | |
| JPS59195340A (en) | Optical pickup supporter | |
| JPS6246442A (en) | Objective lens driving device | |
| JP2737687B2 (en) | Objective lens drive | |
| JPS61115247A (en) | Objective lens drive device | |
| JP2827004B2 (en) | Pickup device in optical information reader | |
| JPS59223947A (en) | Objective lens driving device | |
| JPH0320819B2 (en) | ||
| JPS61273753A (en) | Objective lens supporting device for optical pickup | |
| JPS58182139A (en) | Objective lens driving device | |
| JPS6254842A (en) | Objective-lens driver | |
| JPH0457226A (en) | Optical recording and reproducing device | |
| JPH0294078A (en) | Recording and reproducing device | |
| JPS6163933A (en) | Pickup | |
| JPS62239430A (en) | Optical system driving device |