JPH01201882A - Centering member for information recording medium - Google Patents
Centering member for information recording mediumInfo
- Publication number
- JPH01201882A JPH01201882A JP63025244A JP2524488A JPH01201882A JP H01201882 A JPH01201882 A JP H01201882A JP 63025244 A JP63025244 A JP 63025244A JP 2524488 A JP2524488 A JP 2524488A JP H01201882 A JPH01201882 A JP H01201882A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- hub
- positioning member
- information recording
- resin
- 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
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 3
- 229910010272 inorganic material Inorganic materials 0.000 claims description 3
- 239000011147 inorganic material Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 229920005989 resin Polymers 0.000 abstract description 27
- 239000011347 resin Substances 0.000 abstract description 27
- 238000011049 filling Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 2
- 239000000113 methacrylic resin Substances 0.000 abstract description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 abstract description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 2
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 238000003825 pressing Methods 0.000 description 7
- 238000001746 injection moulding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- -1 voluria Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 208000011231 Crohn disease Diseases 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000003847 radiation curing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000001721 transfer moulding Methods 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、光を照射されることにより物理的あるいは化
学的変化を生じて情報の記録・再生・消去等のいずれか
または全ての過程を為される情報記録媒体の中心位置決
め部材に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a method that causes physical or chemical changes when irradiated with light to perform any or all of the processes such as recording, reproducing, and erasing information. The present invention relates to a center positioning member for an information recording medium.
近年、情報記録分野においては不揮発性記録として、従
来の磁気記録の他に新たに光を照射することにより物理
的あるいは化学的変化を生じて情報記録を為される光記
録が研究・実用化されてきている０例えば、再生専用の
民生用として、家庭用ビデオディスク、オーディオＰ
Ｃ’？ｖ１ディスクなどがある。In recent years, in the field of information recording, in addition to conventional magnetic recording, optical recording, which records information by causing physical or chemical changes by irradiating it with light, has been researched and put into practical use as a non-volatile recording. For example, for playback-only consumer use, home video discs, audio P
C'? There are v1 discs, etc.
この光記録が他の記録方式、例えば磁気記録などに比べ
て優れている点は、
◎ 記録のトラック間距離が１〜２μｍ程度まで近接で
きるため、高密度記録ができる。The advantages of this optical recording over other recording methods, such as magnetic recording, are: ◎ Since the distance between recording tracks can be as close as 1 to 2 μm, high-density recording is possible.
◎ 非接触の記録・再生のため、保守、取扱いが容易で
ある。◎ Easy maintenance and handling due to non-contact recording and playback.
◎ １ビット当りのコストが安い。◎ Low cost per bit.
◎ 記録ａ体の形としてはディスクタイプが多く、他の
高容量記録、例えば磁気テープなどに比べて、アクセス
がたいへん速い。◎ Many types of recording media are disk-type, and access is much faster than other high-capacity recording such as magnetic tape.
などであり、今後の多量の情報記録を必要とする産業社
会においては、まさしく本命の記録方式であるといえよ
う。Therefore, it can be said that this is the preferred recording method in the future industrial society, which will need to record large amounts of information.
そしてこの情報記録媒体はそのトラック追従手段として
基板にグループ、あるいはピットを具備しており、その
ため基板材質としては成形の容易な有機物を使用するこ
とが多いが、この材料は回転軸に対して耐牽耗性の点が
劣るため、第２図に示すように、無機物の中心位置決め
部材（以下、ハブと略す）３２を基板１の中央部に具備
することが必要である。第２図は、従来の情報記録媒体
を記録再生装置に装着したときの主要断面図であり、回
転軸３がハブ３２の中心穴に入り、押し当て板４により
記録板１及びハブ２は回転軸３に押し付けられる。そし
て、押し当て板４は軸受け４０を介して押し当て軸４１
により支持され、押し当て力は板バネ４１により加えら
れる。情報記録媒体の脱着の様子は本発明には直接関与
しないため省略する。そして、これまでにハブに関して
、特開昭６０−４３２４２、特開昭５８−５０６３６の
ような提案がある。This information recording medium has groups or pits on the substrate as a means for tracking the track, and therefore organic materials that are easy to mold are often used as the substrate material, but this material is resistant to the rotating shaft. Since the traction property is poor, it is necessary to provide an inorganic center positioning member (hereinafter abbreviated as a hub) 32 in the center of the substrate 1, as shown in FIG. FIG. 2 is a main cross-sectional view when a conventional information recording medium is installed in a recording/reproducing device.The rotating shaft 3 enters the center hole of the hub 32, and the recording plate 1 and the hub 2 are rotated by the pressing plate 4. It is pressed against the shaft 3. The pressing plate 4 is connected to the pressing shaft 41 via the bearing 40.
The pressing force is applied by a leaf spring 41. The manner in which the information recording medium is attached and detached is not directly related to the present invention and will therefore be omitted. So far, there have been proposals regarding hubs, such as in JP-A-60-43242 and JP-A-58-50636.
しかし、前述の従来技術では下記のような問題点を有す
る。However, the above-mentioned conventional technology has the following problems.
ハブは金属製の円盤形状であることが多く、また基板と
ハブとの固定は接着であることが作業性の点から簡便で
あるが、基板と金属製のハブとの充分な接着力の確保は
甚だ困難である。また、ハブは軽量である方が望ましく
、ハブが金属製の円盤であれば、全体の重量に対するハ
ブの重量が影響する。The hub is often in the shape of a metal disc, and it is easier to fix the board and the hub with adhesive from the viewpoint of workability, but it is important to ensure sufficient adhesive strength between the board and the metal hub. is extremely difficult. Further, it is desirable that the hub be lightweight, and if the hub is a metal disc, the weight of the hub relative to the overall weight will have an effect.
そして、ハブと基板との接着強度を増加させるために、
ハブの形状を大有り円盤より段付き大有り円筒に変更し
て細い方の円筒部を基板中心穴に挿入して接着するのは
よい方法である反面、ハブの形状が複雑となり、ハブが
高価になる欠点がある。And in order to increase the adhesive strength between the hub and the board,
Although it is a good method to change the shape of the hub from a large circular disc to a stepped large cylinder and then insert the thinner cylindrical part into the center hole of the board and glue it together, the shape of the hub becomes complicated and the hub becomes expensive. There are drawbacks to it.
そこで、本発明はこのような問題点を解決するもので、
その目的とするところは容易に基板との接着力を確保で
き、かつ軽量で、大量生産に好適な情報記録媒体の中心
位置決め部材を提供するところにある。Therefore, the present invention aims to solve these problems.
The purpose is to provide a center positioning member for an information recording medium that can easily secure adhesive strength with a substrate, is lightweight, and is suitable for mass production.
本発明の情報記録媒体の中心位置決め部材は、記録案内
溝を具備する円盤形状の透明基板と、該透明基板上に形
成され光を照射されることにより、物理的あるいは化学
的変化を生じて情報の記録・再生・消去等のいずれかま
たは全ての過程を為される記録層を有し、前記透明基板
の一部を成す記録案内溝の中心位置決め部材とを少なく
とも具備し、前記記録層は該中心位置決め部材が前記透
明基板に固着される逆面に形成される情報記録媒体の中
心位置決め部材において、該中心位置決め部材が無機物
と有機物とを一体化されて形成されることを特徴とする
。The center positioning member of the information recording medium of the present invention includes a disk-shaped transparent substrate provided with a recording guide groove, and is formed on the transparent substrate and undergoes a physical or chemical change when irradiated with light to provide information. a recording layer that undergoes any or all of the processes of recording, reproduction, erasing, etc., and at least a center positioning member for a recording guide groove forming a part of the transparent substrate; The center positioning member of the information recording medium is formed on the opposite side of the transparent substrate on which the center positioning member is fixed, and is characterized in that the center positioning member is formed by integrating an inorganic substance and an organic substance.
第１図は本発明の一実施例における情報記録媒体の断面
図であり、１が記録板（基板）であり、２がハブであり
、ハブ２はその側面に突起部を持つ埋め込み環５とこれ
を一体化された樹脂充填部６とにより構成されている。FIG. 1 is a sectional view of an information recording medium according to an embodiment of the present invention, in which 1 is a recording plate (substrate), 2 is a hub, and the hub 2 has an embedded ring 5 having a protrusion on its side surface. This is constituted by an integrated resin filling section 6.
そして、ハブ２は記録板１に接着されており、この接着
には嫌気性接着剤を用いた。３が記録板１及びハブ２を
支持する回転軸であり、４は従来例と同様に記録板１及
びハブ２を回転軸３に押し付ける押し当て軸である。こ
のようにして、本発明の情報記録媒体は従来例と同様に
回転軸３に装着される。さて、ハブ２の製作については
以下に説明する。第３図は今回のハブ２の製作に使用し
た縦型射出成形機の概要部であり、３６が下金型であり
、下金型３６は金型固定板１６に固定され、７は上金型
であり、上金型７は可動側固定板１７に固定され、上金
型７はガイド軸１４に沿って、可動側固定板１７と一体
で２３のように上下動を行う、そして、１８が樹脂が射
出成形のために通過するシリンダであり、樹脂は材料受
け２０に蓄えられてシリンダ１８に供給され、１９がシ
リンダ１８中の樹脂を金型３６．７間の空間に注入する
ための加圧機構部であり、これらの構成部はベツド１５
上に各々固定あるいは支持されている。ここで、可動側
固定板１７の上下動機構、型締め機構、加圧＠横部１９
、並びにシリンダ１８中のｔｉ構等は直接本発明の目的
に関与しないため省略する。The hub 2 was bonded to the recording plate 1 using an anaerobic adhesive. 3 is a rotating shaft that supports the recording plate 1 and the hub 2, and 4 is a pressing shaft that presses the recording plate 1 and the hub 2 against the rotating shaft 3 as in the conventional example. In this manner, the information recording medium of the present invention is mounted on the rotating shaft 3 in the same manner as in the conventional example. Now, the manufacturing of the hub 2 will be explained below. Figure 3 shows a schematic diagram of the vertical injection molding machine used to manufacture the hub 2. 36 is the lower mold, the lower mold 36 is fixed to the mold fixing plate 16, and 7 is the upper mold. The upper mold 7 is fixed to the movable side fixed plate 17, and the upper mold 7 moves up and down along the guide shaft 14 integrally with the movable side fixed plate 17 as shown in 23. is a cylinder through which the resin passes for injection molding, the resin is stored in a material receiver 20 and supplied to the cylinder 18, and 19 is a cylinder for injecting the resin in the cylinder 18 into the space between the molds 36.7. This is a pressurizing mechanism section, and these components are attached to the bed 15.
Each is fixed or supported on the top. Here, the vertical movement mechanism of the movable side fixed plate 17, the mold clamping mechanism, the pressure @ lateral part 19
, the ti structure in the cylinder 18, etc. are omitted because they are not directly related to the purpose of the present invention.
そして、第４図（ａ）、（ｂ）は射出成形機の金型の要
部断面図であり、ハブ２は製作工程を以下に説明する。FIGS. 4(a) and 4(b) are sectional views of essential parts of a mold of an injection molding machine, and the manufacturing process of the hub 2 will be explained below.
第４図（ａ）において、下金型３６は穴の中央に突起部
を持っておりこの突起部に埋め込み環５の中心穴を入れ
る。今回の埋め込み環５は磁性ステンレスａｓｔＪｓ４
３０を使用してプレスにより製作した。埋め込み環５を
下金型３６に装填した後に、上金型７を下金型３６と密
着させる。樹脂１１はノズル１０を通り、ランナ１２に
充満し、ゲート１３を通過して、上金型７と下金型３６
とにより作り出される空間（ハブ形状）に充満していく
４図中において、８は品物押し出しエジェクタピンであ
り、９は品物押し出しエジェクタピン８が埋め込み環５
に接触しないように下降させておくためのバネであり、
図では省略しであるが、往復運動機構とバネ９とにより
品物押し出しエジェクタピン８は往復運動が可能である
。In FIG. 4(a), the lower mold 36 has a protrusion in the center of the hole, and the center hole of the embedded ring 5 is inserted into this protrusion. The embedded ring 5 this time is magnetic stainless steel astJs4
It was manufactured by pressing using No. 30. After loading the embedded ring 5 into the lower mold 36, the upper mold 7 is brought into close contact with the lower mold 36. The resin 11 passes through the nozzle 10, fills the runner 12, passes through the gate 13, and enters the upper mold 7 and the lower mold 36.
In the figure, 8 is an ejector pin for pushing out the product, and 9 is the ejector pin 8 for pushing out the product by filling the space (hub shape) created by the ring 5.
It is a spring that keeps the product lowered so as not to contact the
Although not shown in the figure, the product ejector pin 8 can be reciprocated by a reciprocating mechanism and a spring 9.
さて、樹脂１１が上金型７と下金型３６との空間に充満
した後に樹脂１１を冷却凝固させた状態か第４図（ｂ）
である、上金型７は２２のように上昇し、樹脂１１はノ
ズル１０の先端部にて分離する。この後、品物押し出し
エジェクタピン８を２１のように上昇させて、埋め込み
環５と樹脂充填部６とか一体化した品物を下金型３６よ
り分離させて取り出す、そして、ゲート部にてスプール
と樹脂充填部とを分離させ、例えば折るなどしたものが
ハブ２となる。Now, the state in which the resin 11 is cooled and solidified after the resin 11 fills the space between the upper mold 7 and the lower mold 36 is shown in FIG. 4(b).
The upper mold 7 rises as shown at 22, and the resin 11 separates at the tip of the nozzle 10. After that, the product extrusion ejector pin 8 is raised as shown in 21, and the product with the embedded ring 5 and the resin filling part 6 integrated is separated and taken out from the lower mold 36, and the spool and resin are removed at the gate part. The hub 2 is obtained by separating the filling part and, for example, folding it.
このようにして、ハブ２は効率よく製作される。In this way, the hub 2 is manufactured efficiently.
尚、本発明はハブの構成として二種類の材質より成るこ
とを特徴とし、埋め込み環５の材質としては、鋼、ステ
ンレス等の金属類、またはセラミクス等の焼結体か適用
可能であり、樹脂充填部６の材質としては、塩化ビニル
樹脂、メチルメタアクリル樹脂、エポキシ樹脂、メラミ
ン樹脂、ＡＢＳ樹脂、Ａｓ樹脂、硅素樹脂、含フツ素樹
脂、ポリオレフィン系の樹脂、ポリアセタール、ポリイ
ミド、ポリアミド、ポリエステル、ポリアミドイミド、
ポリフェニレンオキシド、ポリスルホン、ポリウレタン
、ボリュリア、ポリスチレン、変性ポリスチレン、酢酸
セルロース、塩素化ポリエーテル、ポリカーボネート、
ポリエチレン、ポリエチレンテレフタレート、ポリプロ
ピレン、塩化ビニリデン樹脂、フェノール樹脂、ポリウ
レタン、シリコーン樹脂等の単一または二種以上の樹脂
を共重合、混合させた高分子材料が適用可能であり、ま
た本実施例においてはハブの製作には射出成形機を使用
したが、その他、圧縮成形、トランスファ成形、押し出
し成形等が適用できる。The present invention is characterized in that the hub is made of two types of materials, and the material of the embedded ring 5 can be metals such as steel or stainless steel, or sintered bodies such as ceramics, and resin. Materials for the filling part 6 include vinyl chloride resin, methyl methacrylic resin, epoxy resin, melamine resin, ABS resin, As resin, silicon resin, fluorine-containing resin, polyolefin resin, polyacetal, polyimide, polyamide, polyester, polyamideimide,
Polyphenylene oxide, polysulfone, polyurethane, voluria, polystyrene, modified polystyrene, cellulose acetate, chlorinated polyether, polycarbonate,
Polymer materials made by copolymerizing or mixing a single resin or two or more resins such as polyethylene, polyethylene terephthalate, polypropylene, vinylidene chloride resin, phenol resin, polyurethane, and silicone resin can be applied, and in this example, Although an injection molding machine was used to manufacture the hub, other methods such as compression molding, transfer molding, extrusion molding, etc. can also be applied.
また、本発明の実施例は上述に限るものではなく、上述
の実施例に使用した埋め込み環（側面に突起部を全周に
わたり有する）を示す図か第５図であるが、その他に側
面に全周にわたり突起部を二部所有する埋め込み環を示
す図が第６図であり、この突起部は全周にわたらず三部
分、三部分などに分断され゛ていても有効である。また
、側面に鉤部を一箇所、二部所有する埋め込み環を示す
図が第７図、第８図であり、あるいは埋め込み環を単な
る円管として、埋め込み環の両端を部分的に覆うように
樹脂を充填したハブを示す図が第９図であり、前述の実
施例と同等の効果を有する。Furthermore, the embodiments of the present invention are not limited to those described above, and although FIG. FIG. 6 is a diagram showing a recessed ring having two protrusions over the entire circumference, and it is effective even if the protrusion is divided into three parts, three parts, etc., instead of extending over the entire circumference. Figures 7 and 8 show an embedded ring with one hook and two hooks on the side, or the embedded ring may be a simple circular tube that partially covers both ends of the embedded ring. FIG. 9 shows a hub filled with resin, which has the same effect as the previous embodiment.
以上述べたように本発明によれば、ハブを無機物より成
る埋め込み環と有機物より成る樹脂充填部とにより構成
する構造とすることにより、ハブを安価に容易に製作す
ることが可能となる。また、埋め込み環と樹脂充填部と
を機械的投描効果により強固に結合させることは、埋め
込み環の形状次第で容易に実現でき、記録板（基板）が
特に有機物より成る場合において、ハブの樹脂充填部と
記録板とを接着する際に７オン・デア・ワールスカ、ク
ローン力、分子間絡み合い、共有結合等の相互作用によ
り、ハブと記録板との接着強度を容易に確保できるため
、接着剤としては各種の接着剤、例えばホットメルト形
、嫌気形、放射線硬化型、熱硬化形等が適用でき、ハブ
と記録板との接着の作業性が大幅に向上する。つまり、
本発明は安価なハブを大量に製作することを可能にし、
ハブと記録板の接合において、信頼性の高い接着を容易
に実現するものである。As described above, according to the present invention, the hub can be easily manufactured at low cost by having a structure in which the hub is constituted by an embedded ring made of an inorganic material and a resin filling part made of an organic material. In addition, it is possible to firmly connect the embedded ring and the resin filling part by a mechanical projection effect depending on the shape of the embedded ring. When bonding the filling part and the recording plate, adhesive strength can be easily ensured between the hub and the recording plate through interactions such as 7 on der Waalska, Crohn's force, intermolecular entanglement, and covalent bonds. Various types of adhesives can be used, such as hot melt adhesives, anaerobic adhesives, radiation curing adhesives, thermosetting adhesives, etc., and the workability of bonding the hub and the recording plate can be greatly improved. In other words,
The present invention makes it possible to mass-produce inexpensive hubs,
This makes it easy to achieve highly reliable adhesion when joining the hub and recording plate.
【図面の簡単な説明】
第１図は、本発明の一実施例を示す情報記録媒体の主要
断面図。
第２図は、従来の情報記録媒体を示す主要断面図。
第３図は、ハブを製作する射出成形機の概要図。
第４図（ａ）及び（ｂ）は、ハブの製作工程を示す要部
断面図。
第５図は、その側面に突起部を一箇所具備する埋め込み
環の断面図。
第６図は、その側面に突起部を三箇所具備する埋め込み
環の断面図。
第７図は、その側面に鉤部を一箇所具備する埋め込み環
の断面図。
第８図は、その側面に鉤部を三箇所具備する埋め込み環
の断面図。
第９図は、本発明の他の実施例を示すハブの断面図。
１・・・記録板（基板）
２・・・中心位置決め部材（ハブ）
３・・・回転軸
４・・・押し当て板
５・・・埋め込み環
６・・・樹脂充填部
７・・・上金型
８・・・品物押し出しエジェクタビン
３６・・下金型
以上
Ｊ）
づ′
請／図
賛 ２ 図
第 ４ ｊＺｌ （ｑ）
％４ ’ＩΔ （ｂ）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a main sectional view of an information recording medium showing an embodiment of the present invention. FIG. 2 is a main sectional view showing a conventional information recording medium. Figure 3 is a schematic diagram of an injection molding machine that manufactures the hub. FIGS. 4(a) and 4(b) are sectional views of main parts showing the manufacturing process of the hub. FIG. 5 is a sectional view of an embedded ring having one protrusion on its side surface. FIG. 6 is a sectional view of an embedded ring having three protrusions on its side surface. FIG. 7 is a sectional view of an embedded ring having one hook portion on its side surface. FIG. 8 is a sectional view of an embedded ring having three hooks on its side surface. FIG. 9 is a sectional view of a hub showing another embodiment of the present invention. 1... Recording plate (substrate) 2... Center positioning member (hub) 3... Rotating shaft 4... Pressing plate 5... Embedded ring 6... Resin filling part 7... Top Mold 8... Product extrusion Ejector bin 36... Lower mold or higher J)
Claims (6)
透明基板上に形成され光を照射されることにより、物理
的あるいは化学的変化を生じて情報の記録・再生・消去
等のいずれかまたは全ての過程を為される記録層を有し
、前記透明基板の一部を成す記録案内溝の中心位置決め
部材とを少なくとも具備し、前記記録層は該中心位置決
め部材が前記透明基板に固着される逆面に形成される情
報記録媒体の中心位置決め部材において、該中心位置決
め部材が無機物と有機物とを一体化されて形成されるこ
とを特徴とする情報記録媒体の中心位置決め部材。(1) A disc-shaped transparent substrate equipped with a recording guide groove, which is formed on the transparent substrate and undergoes a physical or chemical change when irradiated with light, allowing information to be recorded, reproduced, erased, etc. or a recording layer that undergoes all the processes, and at least a center positioning member for a recording guide groove forming a part of the transparent substrate, and the recording layer has a center positioning member fixed to the transparent substrate. 1. A center positioning member for an information recording medium formed on the opposite side of the information recording medium, wherein the center positioning member is formed by integrating an inorganic substance and an organic substance.
た前記透明基板と、前記記録層を形成されない前記透明
基板との組合せによる第１項記載の情報記録媒体の中心
位置決め部材。(2) The center positioning member for an information recording medium according to item 1, wherein the information recording medium is a combination of the transparent substrate on which the recording layer is formed on one side and the transparent substrate on which the recording layer is not formed.
た前記透明基板の二枚の組合せによる第１項記載の情報
記録媒体の中心位置決め部材。(3) The center positioning member for an information recording medium according to item 1, wherein the information recording medium is a combination of two transparent substrates each having the recording layer formed on one side.
た前記透明基板が一枚のみである第１項記載の情報記録
媒体の中心位置決め部材。(4) The center positioning member for an information recording medium according to item 1, wherein the information recording medium has only one transparent substrate with the recording layer formed on one side.
環が、中心穴を形成する円筒部より構成され、該円筒部
の全周または一箇所以上に突起部、あるいは鈎部を具備
することを特徴とする第２項、第３項又は第４項記載の
情報記録媒体の中心位置決め部材。(5) The embedded ring made of an inorganic material of the center positioning member is composed of a cylindrical portion forming a center hole, and is provided with a protrusion or a hook portion on the entire circumference or at one or more locations of the cylindrical portion. The center positioning member for an information recording medium according to item 2, 3, or 4.
環が、中心穴を構成する円管であることを特徴とする第
２項、第３項又は第４項記載の情報記録媒体の中心位置
決め部材。(6) The center positioning member for an information recording medium according to item 2, 3, or 4, wherein the embedded ring made of an inorganic material of the center positioning member is a circular tube forming a center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63025244A JPH01201882A (en) | 1988-02-05 | 1988-02-05 | Centering member for information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63025244A JPH01201882A (en) | 1988-02-05 | 1988-02-05 | Centering member for information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01201882A true JPH01201882A (en) | 1989-08-14 |
Family
ID=12160572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63025244A Pending JPH01201882A (en) | 1988-02-05 | 1988-02-05 | Centering member for information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01201882A (en) |
-
1988
- 1988-02-05 JP JP63025244A patent/JPH01201882A/en active Pending
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