JPH02236880A - Optical information recording disk - Google Patents
Optical information recording diskInfo
- Publication number
- JPH02236880A JPH02236880A JP1056250A JP5625089A JPH02236880A JP H02236880 A JPH02236880 A JP H02236880A JP 1056250 A JP1056250 A JP 1056250A JP 5625089 A JP5625089 A JP 5625089A JP H02236880 A JPH02236880 A JP H02236880A
- Authority
- JP
- Japan
- Prior art keywords
- optical information
- information recording
- recording disk
- hub
- adhesive
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 79
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 239000000853 adhesive Substances 0.000 claims abstract description 36
- 230000001070 adhesive effect Effects 0.000 claims abstract description 36
- 239000012790 adhesive layer Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract 3
- 239000011347 resin Substances 0.000 claims abstract 3
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920006332 epoxy adhesive Polymers 0.000 claims description 3
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 229920000515 polycarbonate Polymers 0.000 description 5
- 239000004417 polycarbonate Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
Landscapes
- 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〕
本発明は光情報記録ディスクに係り、特に光情報記録デ
ィスク基板とハブとの結合部分の構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical information recording disk, and particularly to a structure of a connecting portion between an optical information recording disk substrate and a hub.
マグネットクランプ形の両面光情報記録ディスクは、特
開昭６３−９６７５１号公報に記載されており、第６図
に示したように、光情報記録ディスク基板ｌａ，ｌｂは
スペーサ２ａ，２ｂを介して接合され、その中心の両外
側面に接着で取付けたホルダ−３ａ，３ｂに磁性吸着板
４ａ，４ｂが設けられている。該光情報記録ディスクは
、モータ５によって回転されるターンテーブル６に載置
され、マグネット７によって前記磁性吸着板４ａ（４ｂ
）を吸着することによって該ターンテーブル６上に保持
される。この光情報記録ディスクのホルダー３ａ，３ｂ
は、光情報記録ディスク基板１ａ，１ｂと磁性吸着板４
ａ，４ｂの熱膨張率の差により，該光情報記録ディスク
基板１ａ，ｌｂに応力が作用するのを緩和する材料で作
られている．すなわち、光情報記録ディスク基板１ａ，
ｌｂは応力示作用すると゜複屈折が発生し，記録媒体か
らの再生信号が劣化する。一般の光情報記録ディスク基
板１ａ，ｌｂの材料であるポリカーボネートは．光弾性
係数が大きいために大きな複屈折が発生して再生信号の
劣化が著しい問題がある。A magnetic clamp type double-sided optical information recording disk is described in Japanese Patent Application Laid-Open No. 63-96751, and as shown in FIG. Magnetic adsorption plates 4a, 4b are provided on holders 3a, 3b which are joined together and attached to both outer surfaces of the center with adhesive. The optical information recording disk is placed on a turntable 6 rotated by a motor 5, and a magnet 7 holds the magnetic adsorption plate 4a (4b).
) is held on the turntable 6 by adsorption. Holders 3a and 3b of this optical information recording disk
The optical information recording disk substrates 1a and 1b and the magnetic adsorption plate 4
The optical information recording disk substrates 1a and 1b are made of a material that alleviates stress acting on the optical information recording disk substrates 1a and 1b due to the difference in thermal expansion coefficients of the substrates 1a and 4b. That is, the optical information recording disk substrate 1a,
When lb is subjected to stress action, ° birefringence occurs and the reproduced signal from the recording medium deteriorates. Polycarbonate, which is the material for general optical information recording disk substrates 1a and lb, is... Since the photoelastic coefficient is large, large birefringence occurs, resulting in significant deterioration of the reproduced signal.
また、該光情報記録ディスクの温度が繰返し変化すると
、光情報記録ディスク基板１ａ，ｌｂとホルダー３ａ，
３ｂの接着面に作用する応力も繰返し発生して該接着面
が剥離したり、光情報記録ディスク基板１ａ，ｌｂに亀
裂が発生する等の問題がある．この問題は、ポリカーボ
ネートのように光弾性係数の大きな材料に限らず、光弾
性係数の小さいプラスチックやガラス等の無機材料を使
用した光情報記録ディスク基板の場合でも起る共通の問
題である．
ところで、光情報記録基板１ａ，ｌｂとホルダ−３ａ，
３ｂの結合は，結合力の大きい超音波接着や剛性が大き
い接着剤を使用している．これは，該光情報記録ディス
クを前記ターンテーブル６から取外すときに、磁性吸着
板４ａ（４ｂ）をマグネット７の吸着力に逆らって引離
さなければならず，このときに接着面に作用する大きな
引剥がし力に対抗するためである．
〔発明が解決しようとする課題〕
以上のように、マグネットクランプ用の磁性吸着板を備
えた従来の光情報記録ディスクは、光情報記録ディスク
基板に対する磁性吸着板の取付け部分において応力を緩
和するために中間部材が必要であり、部品管理や組立（
接着）作業の点で不利であった．
従って本発明の目的は、部品管理や組立（接着）作業を
容易にすることにある．
〔課題を解決するための手段〕
本発明はこの目的を達成するために、ターンテーブルに
設けられたマグネットによって吸着される磁性吸着部材
（７ａ性ハブ）を備えた光情報記録ディスクにおいて、
前記ハブを鍔付きの磁性体とし，該ハブと前記光情報記
録ディスク基板との結合を，該ハブの鍔部側面と該光情
報記録ディスク基板の反マグネット側の側面の間で接着
剤により直接行なったことを特徴とする。Moreover, when the temperature of the optical information recording disk changes repeatedly, the optical information recording disk substrates 1a, lb and the holder 3a,
The stress acting on the adhesive surface of the optical information recording disk 3b is also repeatedly generated, causing problems such as peeling of the adhesive surface and cracking of the optical information recording disk substrates 1a and lb. This problem is a common problem that occurs not only with materials with a high photoelastic coefficient such as polycarbonate, but also with optical information recording disk substrates that use inorganic materials such as plastic and glass with a small photoelastic coefficient. By the way, the optical information recording substrates 1a, lb and the holder 3a,
For the bonding in 3b, ultrasonic adhesive with high bonding force or adhesive with high rigidity is used. This is because when the optical information recording disk is removed from the turntable 6, the magnetic adsorption plate 4a (4b) must be separated against the adsorption force of the magnet 7, and at this time, a large amount of force is applied to the adhesive surface. This is to resist the peeling force. [Problems to be Solved by the Invention] As described above, the conventional optical information recording disk equipped with a magnetic adsorption plate for a magnetic clamp is designed to relieve stress at the part where the magnetic adsorption plate is attached to the optical information recording disk substrate. Intermediate parts are required for parts management and assembly (
This was disadvantageous in terms of adhesive work. Therefore, an object of the present invention is to facilitate parts management and assembly (bonding) work. [Means for Solving the Problems] In order to achieve this object, the present invention provides an optical information recording disk equipped with a magnetic attraction member (7a magnetic hub) that is attracted by a magnet provided on a turntable.
The hub is made of a magnetic material with a flange, and the hub and the optical information recording disk substrate are directly connected with adhesive between the side surface of the flange of the hub and the side surface of the optical information recording disk substrate on the side opposite to the magnet. Characterized by what has been done.
光情報記録ディスク基板とハブは接着剤によって簡単に
結合することができる．光情報記録ディスクをマグネッ
トの吸着力に逆らって前記ターンテーブルから取外すと
きに光情報記録ディスク基板とハブの間に作用する大き
な力は鍔部とディスク基板側面の朋に形成された接着面
に対しては圧縮方向であるので、剥離の心配がない。ま
た、熱膨張係数の差により発生するずれは接着剤層が吸
収するので，光情報記録ディスク基板に無理な応力が作
用しない．
〔実施例〕
以下、本発明の実施例を第１図〜第５図を参照して説明
する。The optical information recording disk substrate and hub can be easily joined together using adhesive. When the optical information recording disk is removed from the turntable against the attraction force of the magnet, the large force that acts between the optical information recording disk substrate and the hub is applied to the adhesive surface formed between the flange and the side surface of the disk substrate. Since the direction is in the compression direction, there is no need to worry about peeling. Furthermore, since the adhesive layer absorbs the misalignment caused by the difference in thermal expansion coefficients, no undue stress is applied to the optical information recording disk substrate. [Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 5.
第１図において、光弾性係数が６Ｘ１０−１”Ｐａ−１
のポリカーボネートで作られた光情報記録ディスク基板
１０の中心にはセンタ孔１０ａが形成され，その外周上
側面には記録層１１が設けられる。ステンレス磁性板で
カップ状に形成されたハブ１２は、その底部１２ａの中
心にスピンドル穴１２ｂが設けられ，胴部１２ｃは前記
センタ孔１０ａよりも僅かに小径に形成され、上縁開口
部は外側に開曲された鍔部１２ｄを備えている．該ハブ
１２は、その胴部１２ｃが前記光情報記録ディスク基板
１０の記録層１１側から前記センタ孔１０ａに挿入され
，その鍔部１２ｄを接着剤１３によって該光情報記録デ
ィスク基板１０の側面に直接接着して固定する。In Figure 1, the photoelastic coefficient is 6X10-1"Pa-1
A center hole 10a is formed in the center of an optical information recording disk substrate 10 made of polycarbonate, and a recording layer 11 is provided on the upper surface of the outer periphery of the center hole 10a. The hub 12, which is formed into a cup shape from a stainless steel magnetic plate, has a spindle hole 12b at the center of its bottom 12a, a body 12c having a slightly smaller diameter than the center hole 10a, and an upper edge opening on the outside. It has a flange 12d that is bent. The body portion 12c of the hub 12 is inserted into the center hole 10a from the recording layer 11 side of the optical information recording disk substrate 10, and the flange portion 12d is attached to the side surface of the optical information recording disk substrate 10 with adhesive 13. Glue and fix directly.
このように構成された光情報記録ディスクは、第２図に
示したように、スピンドル穴１２ｂをスピンドル１４ａ
に合わせてハブ１２をターンテーブル１４に戟置し、マ
グネット１４ｂにハブ１２の底部１２ａを吸着させるこ
とによって装着される．
そして、該光情報記録ディスクをターンテーブル１４か
ら取外すときには、光情報記録ディスク基板１０を掴ん
で引上げるが、このときハブ１２に働く磁気吸着力は鍔
部１２ｄを介して接着面に対して圧縮力として作用する
ので、簡単な接着でもハブ１２が光情報記録ディスク基
板１ｏから剥離するようなことがない．
また、熱膨張係数の差により発生する半径方向のずれは
接着剤層１３が吸収するので、光情報記録ディスク基板
１ｏに無理な応力が作用しない．ところで、ポリカーボ
ネートで光情報記録ディスク基板１０を形成し、ステン
レス磁性板でハブ１２を形成した場合、±２５℃の温度
変化に対して前記光情報記録ディスク基板１０に発生す
る複屈折を６０ ｎｍ以下にするためには、接着剤層１
３が３０μｍ以上の厚みを有し、厚み換算の横弾性係数
が１０００ Ｋｇ／Ｃｍ”以下となるようにすることが
望ましいことがわかった．第５図は接着剤層の物性と光
情報記録ディスク基板の複屈折の関係を示している．
光情報記録ディスク基板１０として一般的なプラスチッ
ク（アクリル系樹脂，エポキシ系樹脂、ポリオレフィン
、ポリカーボネート）を使用し、ハブ１２にステンレス
磁性板を使用した光情報記録ディスクの温度サイクルテ
スト（２５±２５℃を５０回）では、接着剤として嫌気
性接着剤、エボキシ系接着剤，ウレタン系接着剤、ゴム
系接着剤の何れを使用しても、接着面の剥離が発生しな
いようにするには、接着剤層１３の厚みを５０μｍ以上
とし、厚み換算の横弾性係数を１５００Ｋｇ／ｃｍ２以
下にすることが望ましいことがわかった。In the optical information recording disk constructed in this way, as shown in FIG.
The hub 12 is placed on the turntable 14 according to the timing, and the bottom 12a of the hub 12 is attached to the magnet 14b. When removing the optical information recording disk from the turntable 14, the optical information recording disk substrate 10 is grasped and pulled up. At this time, the magnetic attraction force acting on the hub 12 is compressed against the adhesive surface via the flange 12d. Since it acts as a force, the hub 12 will not be peeled off from the optical information recording disk substrate 1o even with simple adhesion. Further, since the adhesive layer 13 absorbs the radial deviation caused by the difference in thermal expansion coefficients, no undue stress is applied to the optical information recording disk substrate 1o. By the way, when the optical information recording disk substrate 10 is formed of polycarbonate and the hub 12 is formed of a stainless steel magnetic plate, the birefringence generated in the optical information recording disk substrate 10 with respect to a temperature change of ±25° C. is 60 nm or less. In order to
It was found that it is desirable that the adhesive layer has a thickness of 30 μm or more and a transverse elastic modulus of 1000 Kg/Cm or less in terms of thickness. Figure 5 shows the physical properties of the adhesive layer and the optical information recording disk. The relationship between the birefringence of the substrate is shown. The optical information recording disk substrate 10 is made of common plastic (acrylic resin, epoxy resin, polyolefin, polycarbonate), and the hub 12 is made of stainless steel magnetic plate. In a temperature cycle test (25±25°C 50 times) of recording disks, no matter which adhesive was used, such as anaerobic adhesive, epoxy adhesive, urethane adhesive, or rubber adhesive, the adhesive surface It has been found that in order to prevent peeling, it is desirable that the thickness of the adhesive layer 13 be 50 μm or more and the transverse elastic modulus converted to thickness be 1500 Kg/cm 2 or less.
また、光情報記録ディスク基板１０にガラスを使用し、
ハブ１２にステンレス磁性板を使用した光情報記録ディ
スクの温度サイクルテスト（２５±２５℃を５０回）で
は、接着剤として嫌気性接着剤、エポキシ系接着剤、ウ
レタン系接着剤、ゴム系接着剤の何れを使用しても、接
着面の剥離が発生しないようにするには、接着剤層１３
の厚みを１０μ一以上とし，厚み換算の横弾性係数を２
０００ Ｋｇ／ｃｍ”以下にすることが望ましいことが
わかった．
以上のような接着剤層ｌ３の厚みを得るためには、必要
な層厚に等しい粒径の少量のガラスビーズまたはアルミ
ナ等の研磨材を接着剤中に混入すれば良い．
第３図は、所定の接着剤層厚を得るための光情報記録デ
ィスク基板１０とハブ１２との接着結合部分の他の実施
例である．この実施例では、鍔部１２ｄを胴部１２ｃと
同心に波打たせ、外周部に前記光情報記録ディスク基板
１０の側面と接触する位置決め部分１２ｄ′を形成し，
内周部に前記光情報記録ディスク基板１０の側面から所
定距離だけ後退した接着部分１ ２ ｄ ”を形成し、
光情報記録ディスク基板１０の側面と接着部分１ ２
ｄ ”の間に接着剤層１３を形成している。Moreover, glass is used for the optical information recording disk substrate 10,
In a temperature cycle test (25±25°C 50 times) of an optical information recording disk using a stainless steel magnetic plate for the hub 12, the adhesives used were anaerobic adhesive, epoxy adhesive, urethane adhesive, and rubber adhesive. No matter which one is used, in order to prevent peeling of the adhesive surface, the adhesive layer 13
The thickness is 10μ or more, and the transverse elastic modulus converted to thickness is
000 Kg/cm" or less. In order to obtain the thickness of the adhesive layer l3 as described above, it is necessary to polish a small amount of glass beads or alumina, etc., with a particle size equal to the required layer thickness. Figure 3 shows another embodiment of the adhesive bonding portion between the optical information recording disk substrate 10 and the hub 12 to obtain a predetermined adhesive layer thickness. In the example, the flange part 12d is corrugated concentrically with the body part 12c, and a positioning part 12d' that contacts the side surface of the optical information recording disk substrate 10 is formed on the outer peripheral part,
forming an adhesive part 1 2 d'' on the inner peripheral part, which is set back a predetermined distance from the side surface of the optical information recording disk substrate 10;
Side surface of optical information recording disk substrate 10 and adhesive portion 1 2
d'', an adhesive layer 13 is formed between them.
第４図は、所定の接着剤層厚を得るための光情報記録デ
ィスク基板１０とハブ１２との接着結合部分の他の実施
例である．この実施例では、鍔部１２ｄを胴部１２ｃと
同心に波打たせ、内周部に前記光情報記録ディスク基板
１ｏの側面と接触する位置決め部分１２ｄ′を形成し、
外周部に前記光情報記録ディスク基板１０の側面から所
定距離だけ後退した接着部分１２ ｄ ”を形成し、光
情報記録ディスク基板１０の側面と接着部分１ ２ ｄ
”の間に接着剤層１３を形成している。FIG. 4 shows another embodiment of the adhesive bonding portion between the optical information recording disk substrate 10 and the hub 12 to obtain a predetermined adhesive layer thickness. In this embodiment, the flange portion 12d is corrugated concentrically with the body portion 12c, and a positioning portion 12d' that contacts the side surface of the optical information recording disk substrate 1o is formed on the inner peripheral portion,
An adhesive portion 12 d ” is formed on the outer periphery at a predetermined distance from the side surface of the optical information recording disk substrate 10 , and the adhesive portion 1 2 d is connected to the side surface of the optical information recording disk substrate 10 .
An adhesive layer 13 is formed between them.
これらの実施例は、接着剤［１３の幅を狭くして剛性を
小さくし、応力を緩和しやすくするのに好適である．
また、ハブ１２を形成する磁性材料としては、フェライ
ト系ステンレス鋼またはマルテンサイト系ステンレス鋼
が実用的であり、日本工業規格のＳＵＳ４３０が好適で
ある。These embodiments are suitable for narrowing the width of the adhesive [13, reducing its rigidity, and making it easier to relieve stress. Furthermore, as the magnetic material forming the hub 12, ferritic stainless steel or martensitic stainless steel is practical, and SUS430 according to Japanese Industrial Standards is preferred.
更にまた、光情報記録ディスク基板とハブとの接着面は
、鍔部の全周のわたって連続している必要はなく、断片
的であってもよい。この場合には、熱膨張係数の差によ
り発生する接着面での滑り量を均一にして偏心を防止す
る必要があるので、回転対称位置に接着面を設定するこ
とが望ましい。Furthermore, the adhesive surface between the optical information recording disk substrate and the hub does not need to be continuous over the entire circumference of the flange, and may be piecemeal. In this case, it is necessary to equalize the amount of slippage on the bonding surface caused by the difference in thermal expansion coefficients to prevent eccentricity, so it is desirable to set the bonding surface at a rotationally symmetrical position.
以上に述べた実施例は、片面記録の光情報記録ディスク
の場合であるが、第６図に示したような両面記録の光情
報記録ディスクにも同様に適用できることは明らかであ
る。Although the embodiments described above are for single-sided recording optical information recording discs, it is obvious that they can be similarly applied to double-sided recording optical information recording discs as shown in FIG.
以上に述べたように本発明は、ハブを鍔付きの磁性体と
し，該ハブと光情報記録ディスク基板との結合を、該ハ
ブの鍔部側面と該光情報記録ディスク基板の反マグネッ
ト側の側面の間で接着剤層によって直接行なう構成とし
たので、部品管理や組立（接着）作業を容易にすること
ができる効果がある．As described above, in the present invention, the hub is made of a magnetic material with a flange, and the connection between the hub and the optical information recording disk substrate is made between the side surface of the flange of the hub and the side opposite to the magnet of the optical information recording disk substrate. Since it is configured to be bonded directly between the side surfaces using an adhesive layer, it has the effect of making parts management and assembly (adhesion) work easier.
第１図〜第５図は本発明の実施例を示すもので、第１図
は光情報記録ディスクの要部縦断側面図，第２図は該光
情報記録ディスクとターンテーブルの関係を示す要部縦
断側面図、第３図と第４図は他の実施例を示す要部縦断
側面図、第５図は両面接着剤層の物性と光情報記録ディ
スク基板の複屈折の関係を示す特性図である．第６図は
従来の光情報記録ディスクとターンテーブルの関係を示
す縦断側面図である．
１０・・・・・・光情報記録ディスク基板、１２・・・
・・・ハブ、１２ｄ・・・・・・鍔部、１２ｄ′・旧・
・位置決め部分、１ ２ ｄ ”・・・・・・接着部分
、１３・・・・・・接着剤層．第１図
第３図
第
図
第
第
図
図1 to 5 show embodiments of the present invention. FIG. 1 is a vertical sectional side view of the main part of an optical information recording disk, and FIG. 2 is a main part showing the relationship between the optical information recording disk and a turntable. 3 and 4 are longitudinal sectional side views of main parts showing other embodiments. FIG. 5 is a characteristic diagram showing the relationship between the physical properties of the double-sided adhesive layer and the birefringence of the optical information recording disk substrate. It is. Figure 6 is a longitudinal side view showing the relationship between a conventional optical information recording disk and a turntable. 10... Optical information recording disk substrate, 12...
・・・Hub, 12d...Brim part, 12d'・Old・
・Positioning part, 1 2 d"...Adhesive part, 13...Adhesive layer. Fig. 1 Fig. 3 Fig. Fig. Fig.
Claims (1)
吸着される磁性ハブを備えた光情報記録ディスクにおい
て、 前記ハブを鍔付きの磁性体とし、該ハブと前記光情報記
録ディスク基板との結合を、該ハブの鍔部側面と該光情
報記録ディスク基板の反マグネット側の側面の間で接着
剤により直接行なったことを特徴とする光情報記録ディ
スク。 （２）請求項１記載において、前記光情報記録ディスク
基板は光弾性係数が１０＾−＾１＾１＾Ｐａ＾−＾１以
上の樹脂製であって、前記接着剤層は厚みが３０μｍ以
上で横弾性係数が１０００Ｋｇ／ｃｍ＾２以下のもので
あることを特徴とする光情報記録ディスク。（３）請求
項１記載において、前記光情報記録ディスク基板は光弾
性係数が１０＾−＾１＾１Ｐａ＾−＾１以下の樹脂製で
あって、前記接着剤層は厚みが３０μｍ以上で横弾性係
数が１５００Ｋｇ／ｃｍ＾２以下のものであることを特
徴とする光情報記録ディスク。 （４）請求項１記載において、前記光情報記録ディスク
基板はガラスで作られ、前記接着剤層は厚みが１０μｍ
以上で横弾性係数が２０００Ｋｇ／ｃｍ＾２以下のもの
であることを特徴とする光情報記録ディスク。 （５）請求項２、３、４記載のいずれか１つにおいて、
前記鍔部は前記光情報記録ディスク基板の側面に接触す
る位置決め部分と該光情報記録ディスク基板の側面から
所定距離だけ後退して位置し前記接着剤層が所定の厚さ
に形成される接着部分とを備えたことを特徴とする光情
報記録ディスク。 （６）請求項１ないし５記載のいずれか１つにおいて、
前記接着剤を嫌気性接着剤、エポキシ系接着剤、ウレタ
ン系接着剤、ゴム系接着剤から選択したことを特徴とす
る光情報記録ディスク。 る光情報記録ディスク。 （７）請求項１ないし６記載のいずれか１つにおいて、
前記ハブの磁性吸着部材をフェライト系ステンレス鋼ま
たはマルテンサイト系ステンレス鋼にて形成したことを
特徴とする光情報記録ディスク。 （８）請求項１ないし６記載のいずれか１つにおいて、
前記ハブの磁性吸着部材を日本工業規格のＳＵＳ４３０
ステンレス鋼にて形成したことを特徴とする光情報記録
ディスク。（９）請求項１記載において、前記ハブは磁
性体によって鍔付きのカップ状に形成されたものである
ことを特徴とする光情報記録ディスク。[Scope of Claims] (1) An optical information recording disk equipped with a magnetic hub attracted by a magnet provided on a turntable, wherein the hub is a magnetic body with a flange, and the hub and the optical information recording disk substrate are provided. 1. An optical information recording disk, characterized in that the connection is made directly between the side surface of the flange of the hub and the side surface of the optical information recording disk substrate on the side opposite to the magnet using an adhesive. (2) In claim 1, the optical information recording disk substrate is made of resin having a photoelastic coefficient of 10^-^1^1^Pa^-^1 or more, and the adhesive layer has a thickness of 30 μm or more. An optical information recording disk having a transverse elastic modulus of 1000 Kg/cm^2 or less. (3) In claim 1, the optical information recording disk substrate is made of resin having a photoelastic coefficient of 10^-^1^1 Pa^-^1 or less, and the adhesive layer has a thickness of 30 μm or more and a lateral An optical information recording disk having an elastic modulus of 1500 kg/cm^2 or less. (4) In claim 1, the optical information recording disk substrate is made of glass, and the adhesive layer has a thickness of 10 μm.
An optical information recording disk characterized in that it has a transverse elastic modulus of 2000 Kg/cm^2 or less. (5) In any one of claims 2, 3, and 4,
The flange portion includes a positioning portion that contacts the side surface of the optical information recording disk substrate, and an adhesive portion that is located a predetermined distance back from the side surface of the optical information recording disk substrate and where the adhesive layer is formed to a predetermined thickness. An optical information recording disc characterized by comprising: (6) In any one of claims 1 to 5,
An optical information recording disk characterized in that the adhesive is selected from anaerobic adhesives, epoxy adhesives, urethane adhesives, and rubber adhesives. An optical information recording disc. (7) In any one of claims 1 to 6,
An optical information recording disk characterized in that the magnetic attraction member of the hub is made of ferritic stainless steel or martensitic stainless steel. (8) In any one of claims 1 to 6,
The magnetic adsorption member of the hub is made of SUS430 of Japanese Industrial Standards.
An optical information recording disk characterized by being made of stainless steel. (9) The optical information recording disk according to claim 1, wherein the hub is formed of a magnetic material into a cup shape with a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1056250A JP2740242B2 (en) | 1989-03-10 | 1989-03-10 | Optical information recording disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1056250A JP2740242B2 (en) | 1989-03-10 | 1989-03-10 | Optical information recording disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02236880A true JPH02236880A (en) | 1990-09-19 |
| JP2740242B2 JP2740242B2 (en) | 1998-04-15 |
Family
ID=13021839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1056250A Expired - Fee Related JP2740242B2 (en) | 1989-03-10 | 1989-03-10 | Optical information recording disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2740242B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0562407A (en) * | 1991-09-03 | 1993-03-12 | Fuji Photo Film Co Ltd | Magnetic recording cartridge |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148471U (en) * | 1984-09-04 | 1986-04-01 | ||
| JPS6186870U (en) * | 1984-11-08 | 1986-06-06 | ||
| JPS61210540A (en) * | 1985-03-15 | 1986-09-18 | Hitachi Maxell Ltd | Optical disk |
| JPS62298040A (en) * | 1986-06-17 | 1987-12-25 | Asahi Chem Ind Co Ltd | Information recording medium |
| JPS6396751A (en) * | 1986-10-13 | 1988-04-27 | Nippon Telegr & Teleph Corp <Ntt> | Optical disk substrate with hub for magnetic chucking |
| JPS63203578A (en) * | 1987-02-10 | 1988-08-23 | コニカ株式会社 | Magnetic disk |
| JPS63195677U (en) * | 1987-06-03 | 1988-12-16 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5544067A (en) * | 1978-09-22 | 1980-03-28 | Arubuhaimu Magune Yaare | Automatic stop motion of piggyyback system hutch cover in cargo boat |
-
1989
- 1989-03-10 JP JP1056250A patent/JP2740242B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148471U (en) * | 1984-09-04 | 1986-04-01 | ||
| JPS6186870U (en) * | 1984-11-08 | 1986-06-06 | ||
| JPS61210540A (en) * | 1985-03-15 | 1986-09-18 | Hitachi Maxell Ltd | Optical disk |
| JPS62298040A (en) * | 1986-06-17 | 1987-12-25 | Asahi Chem Ind Co Ltd | Information recording medium |
| JPS6396751A (en) * | 1986-10-13 | 1988-04-27 | Nippon Telegr & Teleph Corp <Ntt> | Optical disk substrate with hub for magnetic chucking |
| JPS63203578A (en) * | 1987-02-10 | 1988-08-23 | コニカ株式会社 | Magnetic disk |
| JPS63195677U (en) * | 1987-06-03 | 1988-12-16 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0562407A (en) * | 1991-09-03 | 1993-03-12 | Fuji Photo Film Co Ltd | Magnetic recording cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2740242B2 (en) | 1998-04-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |