JPH01109581A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH01109581A JPH01109581A JP62266774A JP26677487A JPH01109581A JP H01109581 A JPH01109581 A JP H01109581A JP 62266774 A JP62266774 A JP 62266774A JP 26677487 A JP26677487 A JP 26677487A JP H01109581 A JPH01109581 A JP H01109581A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- substrate
- center
- recording medium
- optical recording
- 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 description 18
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 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
本発明は円盤状の基板にハブを貼り合わせた構造の光記
録媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical recording medium having a structure in which a hub is bonded to a disc-shaped substrate.
従来の技術
近年、円盤状の透明基板の一方の面に記録層を設けたり
、所定の情報信号を凹凸ビットとして記録したものを、
レーザ光を用いて情報信号の記録再生を行う媒体が開発
されている。Conventional technology In recent years, a recording layer has been provided on one side of a disc-shaped transparent substrate, or a predetermined information signal has been recorded as uneven bits.
2. Description of the Related Art Media that record and reproduce information signals using laser light have been developed.
この光記録媒体は、高密度記録を行ない得るように記録
トラックの高密度化を図るとともに信号の記録密度を高
めることが行なわれている。記録トラックの高密度化を
図る場合、ヘッドのオフトラックを防止するための回転
中心位置合せのために、円盤状基板にハ゛プを貼り合わ
せた構成となっている。In this optical recording medium, in order to perform high-density recording, the density of recording tracks is increased, and the recording density of signals is also increased. In order to increase the density of recording tracks, a disc-shaped substrate is bonded to a haptic in order to align the center of rotation to prevent the head from going off-track.
以下従来の光記録媒体について説明する。A conventional optical recording medium will be explained below.
第３図は従来の光記録媒体の構成を示すものであり、１
１は円盤状の基板、１２は基板１１上の記録層、１３は
ハブである。ハブ１３は円盤状の基板１１の内径に、ハ
ブ１３の円筒状の凸部が嵌合し貼り合わせである。Figure 3 shows the configuration of a conventional optical recording medium, with 1
1 is a disk-shaped substrate, 12 is a recording layer on the substrate 11, and 13 is a hub. The hub 13 is bonded so that a cylindrical convex portion of the hub 13 fits into the inner diameter of the disk-shaped substrate 11.
発明が解決しようとする問題点
しかしながら上記の従来の構成では、基板の内径とハブ
の円筒状の凸部を嵌合して光記録媒体の回転中心が規制
されるため、ハブの凸部の径に対して基板の内径の嵌合
の際の間隙の状態によって回転中心位置合せ精度が左右
されるとともに、基板の内径の製作寸法誤差によっても
回転中心位置合せ精度が大きく左右されるため、記録ト
ラックの高密度化に対する光記録媒体の回転中心位置合
せの構成としては不適当でちった。Problems to be Solved by the Invention However, in the conventional configuration described above, the center of rotation of the optical recording medium is regulated by fitting the inner diameter of the substrate with the cylindrical protrusion of the hub. The alignment accuracy of the rotational center is affected by the condition of the gap when the inner diameter of the substrate is fitted, and the accuracy of alignment of the rotational center is also greatly affected by the manufacturing dimensional error of the inner diameter of the substrate. This structure is inappropriate for alignment of the center of rotation of an optical recording medium in response to higher density.
本発明は上記従来の問題点を解決するもので、基板のト
ラッキングガイドの中心とハブの内径を同心にすること
のできる光記録媒体を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and aims to provide an optical recording medium in which the center of the tracking guide of the substrate and the inner diameter of the hub can be made concentric.
問題点を解決するだめの手段
この目的を達成するために、本発明の光記録媒体は、基
板の内周部に基板凸部、基板凹部を設け、ハブに基板凸
部、基板凹部に対応するハブ凹部。Means for Solving the Problems In order to achieve this object, the optical recording medium of the present invention is provided with a substrate protrusion and a substrate recess on the inner circumference of the substrate, and a hub corresponding to the substrate protrusion and substrate recess. hub recess.
ハブ凸部を基板のトラッキングガイドの中心とハブの内
径が同心になるように設け、基板凸部、基板凹部とハブ
凹部、ハブ凸部とを互いに嵌合するように貼り合わせた
構成を有している。The hub convex part is provided so that the center of the tracking guide of the board and the inner diameter of the hub are concentric, and the board convex part, the board concave part, the hub concave part, and the hub convex part are bonded together so that they fit together. ing.
作用
この構成によって、基板のトラッキングガイドの中心と
ハブの内径が同心になり、回転中心位置を高精度に規制
することができる光記録媒体を提供できる。Effect: With this configuration, the center of the tracking guide of the substrate and the inner diameter of the hub are concentric, and it is possible to provide an optical recording medium in which the rotation center position can be regulated with high precision.
実施例
以下本発明の一実施例について、図面を参照しながら説
明する。EXAMPLE An example of the present invention will be described below with reference to the drawings.
第１図（＆）は本発明の一実施例における光記録媒体の
断面図、第１図（ｂ）は同平面図を示すものである。第
１図において、１は円盤状の基板、２は基板１上の記録
層、３はハブ、４＆、４ｂは基板上に凸状（又は凹状）
に設けられた基板凸部又は基板凹部、ｓａ 、ｓｂは基
板凸部４＆、基板凹部４ｂに対応するハブ上に凹状又は
凸状に設けられたハブ凹部又はハブ凸部、６は光記録媒
体の回転中心を規制する中心孔である。FIG. 1(&) is a sectional view of an optical recording medium according to an embodiment of the present invention, and FIG. 1(b) is a plan view thereof. In Fig. 1, 1 is a disk-shaped substrate, 2 is a recording layer on the substrate 1, 3 is a hub, 4&, 4b is a convex (or concave) shape on the substrate.
6 is a concave or convex hub concave or convex portion provided on the hub corresponding to the substrate convex portion 4&, and the substrate concave portion 4b; This is a center hole that regulates the center of rotation.
基板１上の基板凸部４ａＬ、基板凹部４ｂは、基板１の
トラッキングガイドの中心から同心円上に設けられてい
る。またハブ３には基板凸部４１Ｌ。The substrate convex portion 4aL and the substrate concave portion 4b on the substrate 1 are provided on a concentric circle from the center of the tracking guide of the substrate 1. Also, the hub 3 has a board protrusion 41L.
基板凹部４ｂに対応したハブ凹部５１Ｌ、ハブ凸部６ｂ
がハブ３の内径の中心から同心になるように設けられて
いる。このハブ３のハブ凹部５１Ｌ、ハブ凸部６ｂは基
板凸部４＆、基板凹部４ｂに精度よく嵌合し貼り合わせ
た構成になっている。A hub recess 51L and a hub protrusion 6b corresponding to the board recess 4b
are provided so as to be concentric with the center of the inner diameter of the hub 3. The hub concave portion 51L and the hub convex portion 6b of the hub 3 are precisely fitted into and bonded to the substrate convex portion 4& and the substrate concave portion 4b.
以上の構成において基板凸部４１Ｌ、基板凹部４ｂは、
基板１を射出成形等で成形する時に同時に形成するため
に同心精度は高精度にすることができ、安定して作るこ
とが可能である。またハブ凹部６＆、ハブ凸部６ｂも同
様にハブ３の射出成形等で成形する時に同時に形成する
ことが可能である。In the above configuration, the substrate convex portion 41L and the substrate concave portion 4b are
Since the substrate 1 is formed at the same time as injection molding or the like, the concentricity can be highly accurate, and it can be manufactured stably. Further, the hub concave portion 6& and the hub convex portion 6b can be similarly formed at the same time when the hub 3 is molded by injection molding or the like.
この基板凸部４１Ｌ、基板凹部４ｂと、ハブ凹部６＆。The board convex portion 41L, the board recess 4b, and the hub recess 6&.
ハブ凸部６ｂとを嵌合させて貼り合わせを行なうことに
より、トラッキングガイドの中心とハブの内径が同心に
なるように位置合わせを行うことが容易にできるもので
ある。By fitting and bonding the hub convex portion 6b, alignment can be easily performed so that the center of the tracking guide and the inner diameter of the hub are concentric.
以上のように第１図の実施例では、四角形又は三角形の
凸部、凹部を設けた基板及びハブを示したが、他の形状
（例えば円形、半円形、凸形等） ・でも互いに嵌合
する構成であれば同様な回転中心位置合わせが可能にな
るものである。また第２図に示すように、基板１に環状
の凹部又は凸部４を設け、ハブ３に基板１の凹部又は凸
部４に対応する環状の凸部、凹部６を設け、互いに嵌合
するように貼り合わせた構成においても同じ効果が得ら
れるものである。As described above, in the embodiment shown in FIG. 1, the substrate and hub are provided with square or triangular convex portions and concave portions, but other shapes (e.g., circular, semicircular, convex, etc.) can also fit into each other. If the configuration is such that a similar rotational center positioning is possible. Further, as shown in FIG. 2, the board 1 is provided with an annular recess or projection 4, and the hub 3 is provided with an annular projection or recess 6 corresponding to the recess or projection 4 of the board 1, so that they fit into each other. The same effect can be obtained even in a structure in which these materials are bonded together.
発明の効果
以上のように本発明によれば記録層を有する円盤状の基
板の内周部に基板凸部、基板凹部を設け、ハブに基板凸
部、基板凹部に対応するハブ凹部。Effects of the Invention As described above, according to the present invention, a substrate convex portion and a substrate concave portion are provided on the inner peripheral portion of a disc-shaped substrate having a recording layer, and a hub concave portion corresponding to the substrate convex portion and the substrate concave portion.
ハブ凸部を基板のトランキングガイドの中心とハブの内
径が同心になるように設けることにより、光記録媒体の
回転中心位置を合わせることが容易にできるものである
。By providing the hub convex portion so that the center of the trunking guide of the substrate and the inner diameter of the hub are concentric, it is possible to easily align the center of rotation of the optical recording medium.
さらに、凹凸部を嵌合させて貼り合わせることにより、
強固な貼り合わせが可能となり、長期にわたってはがれ
が発生しにくい光記録媒体を得ることができるものであ
る。Furthermore, by fitting the uneven parts and pasting them together,
This enables strong bonding and provides an optical recording medium that is unlikely to peel off over a long period of time.
第１図（＆）は本発明の第１の実施例における光記録媒
体の断面図、第１図（ｂ）は同平面図、第２図（ａ）は
本発明の第２の実施例における光記録媒体の断面図、第
２図（ｂ）は同平面図、第３図は従来例における光記録
媒体の断面図である。
１ ・・・・・基板、２・・・・・・記録層、３・・・
・・ハブ、４′＆・・・・・基板凸部、４ｂ・・・・・
基板凹部、５Ｎ・・・・・・ハブ凹部、６ｂ・・・・・
・ハブ凸部、１１・・・・・・基板、１２・・・・・・
記録層、１３・・・・・ハブ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名１−
基３反FIG. 1(&) is a sectional view of an optical recording medium according to a first embodiment of the present invention, FIG. 1(b) is a plan view thereof, and FIG. 2(a) is a cross-sectional view of an optical recording medium according to a second embodiment of the present invention FIG. 2(b) is a plan view of the optical recording medium, and FIG. 3 is a sectional view of the conventional optical recording medium. 1...Substrate, 2...Recording layer, 3...
...Hub, 4'& ... Board protrusion, 4b...
Board recess, 5N...Hub recess, 6b...
・Hub convex portion, 11... Board, 12...
Recording layer, 13...hub. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
base 3 anti
Claims (1)
板凹部を設け、ハブに前記基板凸部、基板凹部に対応す
るハブ凹部、ハブ凸部を基板のトラッキングガイドの中
心とハブの内径が同心になるように設け、前記基板凸部
、基板凹部とハブ凹部、ハブ凸部とを互いに嵌合するよ
うに貼り合わせたことを特徴とする光記録媒体。A substrate protrusion and a substrate recess are provided on the inner periphery of a disc-shaped substrate having a recording layer, and a hub is provided with a hub recess corresponding to the substrate protrusion and substrate recess, and a hub protrusion is connected to the center of the tracking guide of the substrate and the hub. An optical recording medium characterized in that the inner diameters of the substrate convex portion and the substrate concave portion, the hub concave portion, and the hub convex portion are bonded together so as to fit with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62266774A JP2548235B2 (en) | 1987-10-21 | 1987-10-21 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62266774A JP2548235B2 (en) | 1987-10-21 | 1987-10-21 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01109581A true JPH01109581A (en) | 1989-04-26 |
| JP2548235B2 JP2548235B2 (en) | 1996-10-30 |
Family
ID=17435511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62266774A Expired - Lifetime JP2548235B2 (en) | 1987-10-21 | 1987-10-21 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2548235B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02183480A (en) * | 1989-01-10 | 1990-07-18 | Fujitsu Ltd | Substrate for optical disk |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57180883U (en) * | 1981-05-09 | 1982-11-16 |
-
1987
- 1987-10-21 JP JP62266774A patent/JP2548235B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57180883U (en) * | 1981-05-09 | 1982-11-16 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02183480A (en) * | 1989-01-10 | 1990-07-18 | Fujitsu Ltd | Substrate for optical disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2548235B2 (en) | 1996-10-30 |
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