JPS61156547A - Disk-shaped recording medium - Google Patents
Disk-shaped recording mediumInfo
- Publication number
- JPS61156547A JPS61156547A JP59274688A JP27468884A JPS61156547A JP S61156547 A JPS61156547 A JP S61156547A JP 59274688 A JP59274688 A JP 59274688A JP 27468884 A JP27468884 A JP 27468884A JP S61156547 A JPS61156547 A JP S61156547A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- recording
- center hole
- backing
- diameter
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Magnetic Record Carriers (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は円盤状記録媒体、さらに詳しくは記録ディスク
を保護するための裏打ちディスクを貼り合せて構成され
る円盤状記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc-shaped recording medium, and more particularly to a disc-shaped recording medium constructed by laminating a backing disc for protecting the recording disc.
従来、画像信号を記録する媒体として円盤状媒体（ディ
スク）があり例えば画像信号をディスクのトラックに沿
ってレーザ光によって記録し再生する光ディスク、光磁
気ディスクが知られている。Conventionally, disk-shaped media (disks) have been used as media for recording image signals, and for example, optical disks and magneto-optical disks are known in which image signals are recorded and reproduced by laser light along the tracks of the disk.
光磁気ディスクに例をとって説明すれば、ガラス盤もし
くはプラスチック盤にトラックを形成し、これに記録層
、反射層等を設けた記録ディスクと、記録層をキズやホ
コリから保護する目的で設けられた裏打ちディスクとを
貼り合わせる方法が一般的である。Taking magneto-optical disks as an example, there are recording disks in which tracks are formed on a glass or plastic disk, and a recording layer, reflective layer, etc. A common method is to bond the backing disks together.
このようにして製作されたディスクはクランプ材により
スピンドルモータ上のターンテーブルに固定されモータ
ーの回転力が伝達されて回転する。The disk manufactured in this way is fixed to a turntable on a spindle motor using a clamping material, and rotated by the rotational force of the motor.
同じ寸法の径の中心孔を有する記録ディスクと裏打ちデ
ィスクとの接着の場合、通常円筒状の治具を用いるが、
治具の外径と上記各ディスクの中心孔との間には、治具
な脱着するため数拾ミクロンのアソビが必要である。し
たがって記録ディスクと裏打ちディスクが偏心して接着
されることが屡々おこる。このような偏心したディスク
をクランプ材でターンテーブルに固定したときの状況を
図を用いて説明する。When bonding a recording disk and a backing disk that have center holes of the same diameter, a cylindrical jig is usually used.
Between the outer diameter of the jig and the center hole of each disk, a clearance of several tens of microns is required to attach and detach the jig. Therefore, it often happens that the recording disk and the backing disk are attached eccentrically. The situation when such an eccentric disk is fixed to a turntable using a clamping member will be explained using the drawings.
第２図においてディスク１は記録ディスクＩＡと裏打ち
ディスクＩＢを接着剤ＩＣで貼り合せることにより構成
されている。記録ディスクＩＡにはトラックＩＤが形成
されている。ディスク１はスピンドルモータ２のスピン
ドル３に固定されたターンテーブル４上に乗せられ、ス
ピンドル３に嵌合する中心孔を持つ頭を切った円錐状（
テーパ）のクランプ材５が図示しないネジまたはバネ等
でターンテーブル側に押込まれることにより固定されて
いる。In FIG. 2, the disk 1 is constructed by pasting together a recording disk IA and a backing disk IB with an adhesive IC. A track ID is formed on the recording disk IA. The disk 1 is placed on a turntable 4 fixed to a spindle 3 of a spindle motor 2, and has a truncated conical shape (with a central hole that fits into the spindle 3).
A clamp member 5 (tapered) is fixed by being pushed into the turntable side with a screw or spring (not shown).
しかしながらこの様な固定方法ではディスク１の裏打ち
ディスクの中心孔の中心とスピンドルの中心を合せるこ
とになるため、記録ディスクＩＡと裏打ちディスクＩＢ
を貼り合せる段階で生じた偏心がそのままディスクの回
転中心に対するトラックの偏心となって現われ、この偏
心量が大きな時はレーザビームがトラックを追従できな
くなるという欠点があった。However, in this fixing method, the center of the center hole of the backing disk of disk 1 and the center of the spindle must be aligned, so the recording disk IA and the backing disk IB are
The eccentricity that occurs during the bonding process directly appears as eccentricity of the track with respect to the center of rotation of the disk, and when this amount of eccentricity is large, there is a drawback that the laser beam cannot follow the track.
〔発明が解決しようとする問題点〕
本発明は上述の欠点のない円盤状記録媒体を提供するも
のである。[Problems to be Solved by the Invention] The present invention provides a disc-shaped recording medium that does not have the above-mentioned drawbacks.
本発明の構成は、中心孔を有しかつ記録層およびトラッ
クを設けた記録ディスクと、中心孔を有し該記録層を保
護するための裏打ちディスクとを貼り合わせることによ
り構成された円盤状記録媒体において、裏打ちディスク
が記録ディスクの中心孔の直径よりも大きい直径の中心
孔を有することを特徴とする円盤状記録媒体である。The structure of the present invention is a disk-shaped recording device constructed by bonding together a recording disk having a center hole and provided with a recording layer and a track, and a lining disk having a center hole and for protecting the recording layer. The recording medium is a disk-shaped recording medium characterized in that the backing disk has a center hole having a diameter larger than the diameter of the center hole of the recording disk.
本発明の円盤状記録媒体を図面を用いて説明する。第１
図において前述の第２図のごとく、円盤状記録媒体（デ
ィスク）１は、記録ディスクＩＡと裏打ちディスクＩＢ
を接着剤ｌＣで貼り合せることにより構成されている。The disc-shaped recording medium of the present invention will be explained using the drawings. 1st
In the figure, as shown in FIG.
It is constructed by bonding these together with adhesive IC.
記録ディスクＩＡにはトラックＩＤが形成されている。A track ID is formed on the recording disk IA.
ディスクｌはスピンドルモータ２のスピンドル３に固定
されたターンテーブル４上に乗せられ、スピンドル３に
嵌合する中心孔をもつ頭を切った円錐状のクランプ材５
が図示しないネジまたはバネ等でターンテーブル側に押
込まれることにより固定される。この場合本発明のごと
く裏打ちディスクの中心孔の直径が記録ディスクの中心
孔の直径より充分大きい場合には第１図に示すようにク
ランプ５の斜面と記録ディスクＩＡの中心孔の上縁とが
接してディスクｌがターンテーブル４に固定される。し
たがって記録ディスクと裏打ちディスクの貼り合せ時に
偏心がおきても、記録ディスクの回転軸はクランプの回
転軸と一致し、クランプの回転軸はスピンドルモータの
スピンドルの回転軸ときわめて良く一致させることがで
きるので、モータの回転によるトラックの振れを極小に
することができる。しかしてこの場合貼り合せ時に用い
る治具は第３図の如き断面を有するものを用い、治具の
外径と裏打ちディスクおよび記録ディスクの中心孔の内
径との差（アソと）をＦｙとし、裏打ちディスクの厚さ
をＤ鵡、クランプの底面と斜面とのなす角をαとすれば
、図より明らかなように、裏打ちディスクの中心孔の直
径は、記録ディスクの中心孔の直径より２ （Ｆ ＋
Ｄ／ｌａｎα）ａｍ以上大きければよい。したがっ
てこれに適合する寸法の治具を用いることにより、本発
明のディスクを容易に製作することができる。The disk l is placed on a turntable 4 fixed to the spindle 3 of the spindle motor 2, and a truncated conical clamp member 5 with a center hole that fits into the spindle 3 is placed on the turntable 4.
is fixed by being pushed into the turntable side with a screw or spring (not shown). In this case, if the diameter of the center hole of the lining disk is sufficiently larger than the diameter of the center hole of the recording disk as in the present invention, the slope of the clamp 5 and the upper edge of the center hole of the recording disk IA will be connected to each other as shown in FIG. The disc l is fixed to the turntable 4 in contact with the disc l. Therefore, even if eccentricity occurs when the recording disk and backing disk are bonded together, the rotational axis of the recording disk can be aligned with the rotational axis of the clamp, and the rotational axis of the clamp can be aligned extremely well with the rotational axis of the spindle of the spindle motor. Therefore, the runout of the track due to the rotation of the motor can be minimized. However, in this case, the jig used for bonding should have a cross section as shown in Fig. 3, and the difference between the outer diameter of the jig and the inner diameter of the center hole of the backing disk and the recording disk is Fy. Assuming that the thickness of the backing disk is D and the angle between the bottom surface of the clamp and the slope is α, as is clear from the figure, the diameter of the center hole of the backing disk is 2 ( F+
D/lanα)am or more is sufficient. Therefore, by using a jig with a size compatible with this, the disk of the present invention can be easily manufactured.
本発明により裏打ちディスクと記録ディスクを貼り合せ
る際に生じる偏心の影響は全く取り除かれトラックの偏
心量を最小限におさえることができトラッキングの安定
度向上に大きな効果を有する。また、裏打ちディスクと
記録ディスクを貼り合せる時に中心孔を特に精度よく合
せる必要もなく、裏打ちディスクの中心孔の径の精度も
高度には要求されないので製造工程上でも大きな効果が
得られる。According to the present invention, the influence of eccentricity that occurs when bonding the backing disk and the recording disk is completely eliminated, and the amount of eccentricity of the track can be minimized, which has a great effect on improving the stability of tracking. Further, when the backing disk and the recording disk are bonded together, it is not necessary to align the center holes particularly precisely, and the diameter of the center hole of the backing disk does not require high accuracy, so a great effect can be obtained in the manufacturing process.
１４１図は本発明の１例を示す断面図、第２図は従来の
ディスクの１例を示す断面図、第３図は治具の使用状況
を示す図である。
１・・・・・・デ ィ ス り ＩＡ・・・・・・記録
ディスクｌＢ・・・・・・裏打ちディスク ＩＣ・・・
・・・接 着 剤ＩＤ・・・・・・ト ラ ッ
り ２・・・・−・スピンドルモータ３・・・・・・
ス ピン ドル ４・・・・・・ターンテーブル５・・
・・・・クランプ材 ６・・・・・・治 具第
２ 図
１人若林 忠FIG. 141 is a sectional view showing an example of the present invention, FIG. 2 is a sectional view showing an example of a conventional disk, and FIG. 3 is a view showing how the jig is used. 1...Disc IA...Recording disk IB...Backing disk IC...
...Adhesive ID...Truck
2...Spindle motor 3...
Spindle 4... Turntable 5...
...Clamp material 6...Jig No.
2 Figure 1 Tadashi Wakabayashi
Claims (1)
ィスクと、中心孔を有し該記録層を保護するための裏打
ちディスクとを貼り合せることにより構成された円盤状
記録媒体において、裏打ちディスクが、記録ディスクの
中心孔の直径よりも大きい直径の中心孔を有することを
特徴とする円盤状記録媒体。In a disk-shaped recording medium constructed by laminating a recording disk having a center hole and provided with a recording layer and a track, and a backing disk having a center hole and protecting the recording layer, the backing disk is , a disk-shaped recording medium characterized by having a center hole having a diameter larger than that of the center hole of the recording disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59274688A JPS61156547A (en) | 1984-12-28 | 1984-12-28 | Disk-shaped recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59274688A JPS61156547A (en) | 1984-12-28 | 1984-12-28 | Disk-shaped recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61156547A true JPS61156547A (en) | 1986-07-16 |
| JPH0576102B2 JPH0576102B2 (en) | 1993-10-21 |
Family
ID=17545175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59274688A Granted JPS61156547A (en) | 1984-12-28 | 1984-12-28 | Disk-shaped recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61156547A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129129U (en) * | 1986-02-04 | 1987-08-15 | ||
| JPS6322619U (en) * | 1986-07-22 | 1988-02-15 | ||
| JPH0514841U (en) * | 1991-08-02 | 1993-02-26 | 建設省北陸地方建設局長 | Float for flow measurement |
| US5504735A (en) * | 1987-10-27 | 1996-04-02 | Seiko Epson Corporation | Information recording disk having a stepped central recess and hub configuration |
| EP0777225A2 (en) * | 1995-11-28 | 1997-06-04 | Balzers und Leybold Deutschland Holding Aktiengesellschaft | Device for laser beam exposure of a disc-shaped substrate and method of centrally clamping a disc-shaped substrate |
| EP0797195A2 (en) | 1996-03-21 | 1997-09-24 | Sony Corporation | Optical disc and disc cartridge |
| EP1152407A2 (en) * | 2000-04-25 | 2001-11-07 | Matsushita Electric Industrial Co., Ltd. | Optical disk, method for producing the same, and apparatus for producing the same |
| KR100582955B1 (en) * | 2001-05-14 | 2006-05-23 | 엘지전자 주식회사 | High density optical disc having a asymmerically-shaped center hole and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151632A (en) * | 1984-08-20 | 1986-03-14 | Matsushita Electric Ind Co Ltd | Information recording medium |
-
1984
- 1984-12-28 JP JP59274688A patent/JPS61156547A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151632A (en) * | 1984-08-20 | 1986-03-14 | Matsushita Electric Ind Co Ltd | Information recording medium |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129129U (en) * | 1986-02-04 | 1987-08-15 | ||
| JPS6322619U (en) * | 1986-07-22 | 1988-02-15 | ||
| US5504735A (en) * | 1987-10-27 | 1996-04-02 | Seiko Epson Corporation | Information recording disk having a stepped central recess and hub configuration |
| JPH0514841U (en) * | 1991-08-02 | 1993-02-26 | 建設省北陸地方建設局長 | Float for flow measurement |
| EP0777225A3 (en) * | 1995-11-28 | 1999-03-24 | Balzers und Leybold Deutschland Holding Aktiengesellschaft | Device for laser beam exposure of a disc-shaped substrate and method of centrally clamping a disc-shaped substrate |
| EP0777225A2 (en) * | 1995-11-28 | 1997-06-04 | Balzers und Leybold Deutschland Holding Aktiengesellschaft | Device for laser beam exposure of a disc-shaped substrate and method of centrally clamping a disc-shaped substrate |
| EP0797195A2 (en) | 1996-03-21 | 1997-09-24 | Sony Corporation | Optical disc and disc cartridge |
| US6151293A (en) * | 1996-03-21 | 2000-11-21 | Sony Corporation | Two-layer optical disk unaffected by position deviation |
| EP0797195A3 (en) * | 1996-03-21 | 2001-04-11 | Sony Corporation | Optical disc and disc cartridge |
| KR100659740B1 (en) * | 1996-03-21 | 2007-07-06 | 소니 가부시끼 가이샤 | Optical disc and disc cartridge |
| EP1152407A2 (en) * | 2000-04-25 | 2001-11-07 | Matsushita Electric Industrial Co., Ltd. | Optical disk, method for producing the same, and apparatus for producing the same |
| EP1152407A3 (en) * | 2000-04-25 | 2006-10-25 | Matsushita Electric Industrial Co., Ltd. | Optical disk, method for producing the same, and apparatus for producing the same |
| KR100582955B1 (en) * | 2001-05-14 | 2006-05-23 | 엘지전자 주식회사 | High density optical disc having a asymmerically-shaped center hole and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0576102B2 (en) | 1993-10-21 |
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