JPH0492272A - Hub for optical disk incorporating rotary type recording medium - Google Patents

Hub for optical disk incorporating rotary type recording medium

Info

Publication number
JPH0492272A
JPH0492272A JP20808390A JP20808390A JPH0492272A JP H0492272 A JPH0492272 A JP H0492272A JP 20808390 A JP20808390 A JP 20808390A JP 20808390 A JP20808390 A JP 20808390A JP H0492272 A JPH0492272 A JP H0492272A
Authority
JP
Japan
Prior art keywords
hub
optical disk
optical
card
thickness
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
Application number
JP20808390A
Other languages
Japanese (ja)
Inventor
Isao Ikuta
生田 勲
Yoshihira Maeda
佳均 前田
Hisashi Ando
寿 安藤
Yoshio Sato
佐藤 美雄
Ken Sugita
杉田 愃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP20808390A priority Critical patent/JPH0492272A/en
Publication of JPH0492272A publication Critical patent/JPH0492272A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/04Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the shape
    • G06K19/041Constructional details
    • G06K19/042Constructional details the record carrier having a form factor of a credit card and including a small sized disc, e.g. a CD or DVD
    • G06K19/044Constructional details the record carrier having a form factor of a credit card and including a small sized disc, e.g. a CD or DVD comprising galvanic contacts for contacting an integrated circuit chip thereon

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)

Abstract

PURPOSE:To thin an optical card including a hub by making the material of the hub of a magnetic material and making the hub of a smooth disk to have a center hole. CONSTITUTION:The material of a hub is made to be SUS 430 steel and the thickness of the hub is selected in the range of 0.02 to 1 mm. The hub is provided on an optical disk substrate which is <= 2 inches incorporated in the card of credit size. An optical disk 4 is fixed to a hub 1 and a center hole 2 of the hub is attracted by a magnet 6 to the projecting shaft of a spidle motor 5, is clamped and is rotated. The loading of the hub 1 to the disk substrate is executed by adhering or forming integrally. The total thickness of the optical disk including the hub can be thinned and the thinning of a card- shaped memory device is attained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、カード状ケースのなかで、中心軸をもって回
転する光記録媒体を内装し、光ディスクを回転させてケ
ース越しにレーザ光を光ディスクに集光させて情報を記
録、再生あるいは消去等のいずれかまたは全ての過程が
為される記録層をもち、光ディスクを内蔵するカード状
メモリ装置であって、光ディスクのマグネットクランプ
用ハブに関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention includes an optical recording medium that rotates around a central axis inside a card-like case, and a laser beam is directed onto the optical disk through the case by rotating the optical disk. The present invention relates to a card-shaped memory device containing an optical disk and having a recording layer on which information is recorded, reproduced, and/or erased by condensing light, and relates to a hub for magnetic clamping of the optical disk.

〔従来の技術〕[Conventional technology]

光ディスクのクランプ方式の従来例として、特開昭63
−76130号、特開昭63−193392号公報があ
る。これは光ディスクに磁性体のハブを設け、駆動側に
永久磁石を固定し、吸引力によって駆動系に光ディスク
を支持する、いわゆる、マグネットクランプ方式である
。このマグネットクランプ方式は光ディスクを駆動系に
着脱する場合に非常に容易であるという長所をもち、多
々用いられている。
As a conventional example of the clamping method for optical discs,
-76130 and JP-A-63-193392. This is a so-called magnetic clamp method in which a magnetic hub is provided on the optical disk, a permanent magnet is fixed on the drive side, and the optical disk is supported on the drive system using an attractive force. This magnetic clamp method has the advantage of being extremely easy to attach and detach an optical disk to and from a drive system, and is often used.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

近年、ラップトツブコンピュータや可搬型の光ディスク
装置では、より薄型化の要望とともに、光ディスクカー
ドも薄型化が要求されてきている。
In recent years, there has been a demand for thinner laptop computers and portable optical disk devices, as well as thinner optical disk cards.

そこで外形をクレジットカード、テレホンカード等の大
きさにし、その中に光ディスクを収納したものが提案さ
れている。しかし、携帯性と取扱性を考えた場合、大き
さのみならず厚さもこれらの値(約1m+)に近づけな
けれなならない。そのためには光ディスクと駆動系を連
結するパブの厚さを小さくする必要があった。
Therefore, it has been proposed that the external size is the size of a credit card, telephone card, etc., and an optical disk is housed inside. However, when considering portability and ease of handling, not only the size but also the thickness must be close to these values (approximately 1 m+). To achieve this, it was necessary to reduce the thickness of the pub that connects the optical disc and the drive system.

従来のハブは公知例に示したように、厚さが大である。As shown in the known example, the conventional hub has a large thickness.

これは従来品はラップトツブコンピュータや可搬型の光
ディスク装置を目的としていなかったためである。本発
明は、近い将来、薄型化されていく光カードメモリ装置
の光ディスクのマグネットクランプ方式に好適な薄型の
ハブを提供することにある。
This is because the conventional products were not intended for laptop computers or portable optical disk drives. SUMMARY OF THE INVENTION An object of the present invention is to provide a thin hub suitable for magnetic clamping of optical disks in optical card memory devices, which will become thinner in the near future.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、上記目的を達成するために、ハブ形状を単に
中心孔をもつ平滑な円板とし、ハブの厚さを従来よりも
薄< 0.02〜1.0onの範囲とした。すなわち、
光ディスク基板の大きさ及び厚さなどの強度によって、
ハブの取付は方法、及び、厚さを上記した範囲でかえ、
ハブを設けた光ディスク基板のトータルの厚さを極力小
さくするようにした。0.02an以下では後述するよ
うに、マグネットによる吸引力が弱いためにクランプさ
れない。また、1.0IIfa以上では厚くなってしま
う。
In order to achieve the above object, the present invention has a hub shape that is simply a smooth disc with a central hole, and a hub thickness that is thinner than conventional hubs in the range of <0.02 to 1.0 on. That is,
Depending on the strength such as the size and thickness of the optical disc substrate,
When installing the hub, change the method and thickness within the above range,
The total thickness of the optical disc substrate provided with the hub was made as small as possible. If it is 0.02 an or less, as will be described later, the attraction force by the magnet is weak, so the clamp is not clamped. Moreover, if it exceeds 1.0 IIfa, it will become thick.

ハブの形状は単に平滑な円板に中心孔をもつものである
が、中心孔は非円孔でもよい。また、円板が非円板でも
よい。ハブは、通常、耐摩耗性の良好な材質からなる。
The shape of the hub is simply a smooth disc with a center hole, but the center hole may be a non-circular hole. Further, the disc may be a non-disc. The hub is usually made of a material with good wear resistance.

ハブはディスク基板のセンターホールに取付けられる。The hub is attached to the center hole of the disk board.

取付けの際は記録層を形成するグループがスピンドルモ
ータを回転したとき完全に同心円を形成するようにしな
ければならない。なぜなら、情報の記録、消去、再生が
できなくなるためである。中心孔はスピンドルモータの
突起したシャフトに装着するためのものである。ハブは
磁性体からなっており、Fe、Co。
During installation, the groups forming the recording layer must form perfectly concentric circles when the spindle motor is rotated. This is because information cannot be recorded, erased, or reproduced. The center hole is for mounting on the protruding shaft of a spindle motor. The hub is made of magnetic materials such as Fe and Co.

Niのうち少なくとも一種以上の元素からなる。It consists of at least one element among Ni.

また、耐食性に富んでいる材質がよ< 、 SUS30
4鋼がよい、耐食性に富んでいるオーステナイト系のS
US304鋼は非磁性であるが、加工し加工誘起マルテ
ンサイト系にすれば磁性を示すのでSUS304鋼でも
よい。
In addition, the material with high corrosion resistance is SUS30.
4 steel is good, austenitic S with high corrosion resistance
US304 steel is non-magnetic, but if processed to form a strain-induced martensitic system, it will show magnetism, so SUS304 steel may also be used.

〔作用〕[Effect]

本発明のハブを用いることによって、ハブを含めた光カ
ードの厚さを小さくすることができる。
By using the hub of the present invention, the thickness of the optical card including the hub can be reduced.

従って、ラップトツブコンピュータや可搬型の光ディス
ク装置などの薄型化が可能になる。
Therefore, it is possible to make laptop computers, portable optical disk devices, and the like thinner.

〔実施例〕〔Example〕

本実施例の実施例について説明する。第1図は本発明の
ハブの平面図である。第2図はクレジットサイズ(54
x85m)の中に包含した光ディスクの平面図及びB−
B矢視断面図である。カードケース3に収納された光デ
ィスク4はハブ1に固定され、ハブの中心孔2はスピン
ドルモータ5の突起したシャフトにマグネット6によっ
て吸引されクランプされて回転する。記録、消去、再生
信号は対物レンズ7からの光ビームによって、透明な材
質からなるカードケース越しに光ディスク2に照射され
て行われる。ここで透明という意味は入射する光ビーム
の波長に対して透明という意味である。ディスク基板へ
のハブの装着は接看、又は、一体成形のどちらでもよい
。本実施例の場合、ハブは光ディスクの上面に装着され
ているにれはカードケースをスピンドルモータから繰返
し着脱する際、ハブと光ディスクの間で引張り力が働い
て、ハブが光ディスクから剥離するのを防止しである0
本実施例の場合はハブと光ディスクの間に圧縮力が働く
ので剥離しすらい。従って、本実施例の場合と逆にハブ
を光ディスクの下面に装着すると、ハブと光ディスクの
間で引張り力が働いて、ハブが光ディスクから剥離しや
すくなる。
An example of this embodiment will be described. FIG. 1 is a plan view of the hub of the present invention. Figure 2 shows the credit size (54
B-
It is a sectional view taken along arrow B. An optical disk 4 housed in a card case 3 is fixed to a hub 1, and a central hole 2 of the hub is attracted to and clamped by a magnet 6 to a protruding shaft of a spindle motor 5, and rotates. Recording, erasing, and reproduction signals are performed by irradiating the optical disc 2 with a light beam from an objective lens 7 through a card case made of a transparent material. Transparent here means transparent to the wavelength of the incident light beam. The hub may be attached to the disk substrate either directly or by integral molding. In the case of this embodiment, the hub is attached to the top surface of the optical disk, and when the card case is repeatedly attached and detached from the spindle motor, a tensile force acts between the hub and the optical disk, preventing the hub from peeling off from the optical disk. Prevent 0
In the case of this embodiment, a compressive force acts between the hub and the optical disk, so that the disk may easily peel off. Therefore, if the hub is attached to the lower surface of the optical disk, contrary to the case of this embodiment, a tensile force acts between the hub and the optical disk, making it easier for the hub to separate from the optical disk.

但し、接着力、及び、マグネットの吸引力を考慮すれば
光ディスクの下面に装着してもよい。カードケースの大
きさは携帯を考えると、クレジットカード、テレホンカ
ードが好ましいが、3インチ。
However, if the adhesive force and the attraction force of the magnet are considered, it may be attached to the lower surface of the optical disk. The size of the card case is 3 inches, which is preferable for credit cards and telephone cards when considering carrying.

3.5 インチ、5.25 ンチ径の光ディスクが内蔵
できるものでもかまわない。なお、光記録媒体の記録層
は、例えば、穴開はタイプあるいは、相変化タイプの追
記型記録媒体、In5bTe。
It does not matter if it can accommodate a 3.5 inch or 5.25 inch diameter optical disc. The recording layer of the optical recording medium is, for example, a perforated type or a phase change type write-once recording medium, or In5bTe.

Ge5bTe等のように記録時と消去時でアモルファス
と結晶のように相構造が変化し、両方の変化が可逆的に
おこるオーバライド可能な相変化型記録媒体、AgZn
のように記録時と消去時で結晶構造がことなる記録膜媒
体、TbFeCo等の光磁気効果に基づく記録媒体のい
ずれでもよい。
AgZn is a phase-change recording medium that can be overridden, such as Ge5bTe, whose phase structure changes between amorphous and crystalline during recording and erasing, and both changes occur reversibly.
Either a recording film medium having a different crystal structure during recording and erasing, such as the above, or a recording medium based on the magneto-optical effect, such as TbFeCo, may be used.

本発明のハブの厚さは0.02〜1.0mの範囲にあり
、従来よりも非常に薄いことが特徴的である。第3図な
いし第6図は光ディスクの厚さ及び形状が変化した場合
に用いるハブの厚さと装着方法を示したものである。光
ディスクの大きさは2インチのものを用い、ハブの外径
15m、中心孔3.5mとした場合である。第3図は基
板の厚さが比較的大きな場合である(0.5−〜1.0
m)。
The thickness of the hub of the present invention is in the range of 0.02 to 1.0 m, and is characterized by being much thinner than conventional hubs. FIGS. 3 to 6 show the thickness and mounting method of the hub used when the thickness and shape of the optical disc changes. The size of the optical disc is 2 inches, the outer diameter of the hub is 15 m, and the center hole is 3.5 m. Figure 3 shows the case where the substrate thickness is relatively large (0.5-1.0
m).

この場合は光ディスク4のセンタホール(15m)の中
にハブ1を装着する。ハブの厚さは光ディスクの厚さと
同じかそれ以下のものを用いた。これによって、ハブを
含めた光ディスクのトータル厚さは光ディスクの厚さよ
りも大きくならず薄型化が可能になった。また、記録層
がセンタホール側に拡大することができ記録密度が増加
する効果がある。第4図は光ディスクの厚さが0.5n
1のものを用いた場合である。この場合はハブの厚さは
約0.1mのものを用いればよい。ここでハブの厚さが
あまりにも薄いものを用いると強度不足から、回転時に
光ディスクの面振れを起こし、情報の記録、消去、再生
ができなくなるので注意を要する。第5図は光ディスク
が約0.05m+以下のフレキシブルな基板の場合であ
る。用いるハブの厚さは、強度的に面振りを起こさない
程度の薄いものでよい。本実施例の場合、基板の厚さが
0.05−、ハブの長さ0.1閣を用いた。第6図は光
ディスク側に精度のよい内径3.5閣の中心孔がある場
合である。この場合はハブ側の中心孔の精度は必要とせ
ず、光ディスク側の中心孔よりも大きくし、スピンドル
モータのマグネットに吸引力が働く程度の非常に薄いも
のを用いればよい。本実施例の場合、基板の厚さが0 
、5 m 、ハブの内径5.0m+、厚さ0.05m 
を用いた。ハブはマグネットの吸引力を考慮した場合、
光ディスクの下面に装着するのが効果的である。これに
よって、トータル厚さが薄くなる。
In this case, the hub 1 is installed in the center hole (15 m) of the optical disc 4. The thickness of the hub used was the same as or less than the thickness of the optical disk. As a result, the total thickness of the optical disc including the hub does not become larger than the thickness of the optical disc, making it possible to make it thinner. Furthermore, the recording layer can be expanded toward the center hole, which has the effect of increasing the recording density. In Figure 4, the thickness of the optical disc is 0.5n.
1 is used. In this case, a hub having a thickness of approximately 0.1 m may be used. If a hub that is too thin is used, it will not be strong enough to cause the optical disc to run out during rotation, making it impossible to record, erase, or reproduce information. FIG. 5 shows the case where the optical disk is a flexible substrate with a length of about 0.05 m+ or less. The thickness of the hub to be used may be as thin as not to cause surface vibration in terms of strength. In the case of this example, the thickness of the substrate was 0.05 mm, and the length of the hub was 0.1 mm. FIG. 6 shows a case where the optical disc side has a center hole with a highly accurate inner diameter of 3.5 mm. In this case, the precision of the center hole on the hub side is not required, and it is sufficient to use a hole that is larger than the center hole on the optical disk side and very thin enough to exert an attractive force on the magnet of the spindle motor. In this example, the thickness of the substrate is 0.
, 5 m, inner diameter of hub 5.0 m +, thickness 0.05 m
was used. When the hub considers the attraction force of the magnet,
It is effective to attach it to the bottom surface of the optical disc. This reduces the total thickness.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、ハブの形状が平滑で薄い円板であるた
めに、ハブを含めた光ディスクのトータル厚さを薄くす
ることができ、カード状メモリ装置の薄型化が可能にな
る。
According to the present invention, since the shape of the hub is a smooth and thin disk, the total thickness of the optical disk including the hub can be reduced, and the card-shaped memory device can be made thinner.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例のハブの平面図、第2図はク
レジットサイズのカードの中に光ディスクを包含した平
面図(a)B−B矢視断面図、第3図はハブを光ディス
クのセンタホールの中に装着した断面図、第4図はハブ
を光ディスクの上面に装着した断面図、第5図はフレキ
シブルな光ディスクの上面にハブを装着した断面図、第
6図は中心孔を有する光ディスクの上面にハブを装着し
た断面図を示す。 1・・・ハブ、2・・・中心孔、3・・・カードケース
、4・・・光ディスク、5・・・スピンドルモータ、6
・・・マグネ第 切 <6) 乙
Fig. 1 is a plan view of a hub according to an embodiment of the present invention, Fig. 2 is a plan view of a credit-sized card containing an optical disk (a), and a sectional view taken along the line B-B. Figure 4 is a cross-sectional view of the hub installed in the center hole of the optical disk, Figure 5 is a cross-sectional view of the hub installed on the top of the optical disk, Figure 6 is the center hole of the optical disk. FIG. 3 is a cross-sectional view showing a hub mounted on the upper surface of an optical disc having a hub. 1... Hub, 2... Center hole, 3... Card case, 4... Optical disk, 5... Spindle motor, 6
... Magne No. 6 <6) Otsu

Claims (1)

【特許請求の範囲】 1、透明な材質からなる一対のカード状ケースの中で、
外部回転駆動源に連結するためのハブを設け、中心軸を
もつて回転する光記録媒体を内装し、透明ケース越しに
レーザ光をディスクに照射して記録、再生を行なう光カ
ード状メモリ装置において、 前記ハブの材質が磁気性体で、中心孔をもつ平滑な円板
であることを特徴とする光ディスク用ハブ。 2、請求項1において、前記ハブの材質がFe、Co、
Niのうち少なくとも一種以上の元素からなる光ディス
ク用ハブ。 3、請求項1または2において、前記ハブの材質がSU
S430鋼からなる光ディスク用ハブ。 4、請求項1、2または3において、前記ハブの厚さが
0.02〜1mmの範囲にある光ディスク用ハブ。 5、請求項1、2、3または4において、前記ハブをク
レジットサイズのカードの中に内装した2インチ及び2
インチ以下の光ディスク基板に設けた光ディスク用ハブ
[Claims] 1. In a pair of card-like cases made of transparent material,
In an optical card-like memory device that is provided with a hub for connection to an external rotational drive source, contains an optical recording medium that rotates around a central axis, and performs recording and playback by irradiating the disk with laser light through a transparent case. . A hub for an optical disk, wherein the hub is made of a magnetic material and is a smooth disc with a central hole. 2. In claim 1, the material of the hub is Fe, Co,
An optical disk hub comprising at least one element of Ni. 3. In claim 1 or 2, the material of the hub is SU.
Optical disk hub made of S430 steel. 4. The hub for an optical disc according to claim 1, 2 or 3, wherein the hub has a thickness in a range of 0.02 to 1 mm. 5. Claims 1, 2, 3 or 4, wherein the hub is installed in a credit-sized card.
An optical disc hub installed on an optical disc board of inch or less.
JP20808390A 1990-08-08 1990-08-08 Hub for optical disk incorporating rotary type recording medium Pending JPH0492272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20808390A JPH0492272A (en) 1990-08-08 1990-08-08 Hub for optical disk incorporating rotary type recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20808390A JPH0492272A (en) 1990-08-08 1990-08-08 Hub for optical disk incorporating rotary type recording medium

Publications (1)

Publication Number Publication Date
JPH0492272A true JPH0492272A (en) 1992-03-25

Family

ID=16550363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20808390A Pending JPH0492272A (en) 1990-08-08 1990-08-08 Hub for optical disk incorporating rotary type recording medium

Country Status (1)

Country Link
JP (1) JPH0492272A (en)

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