JPH0480472B2 - - Google Patents
Info
- Publication number
- JPH0480472B2 JPH0480472B2 JP23306684A JP23306684A JPH0480472B2 JP H0480472 B2 JPH0480472 B2 JP H0480472B2 JP 23306684 A JP23306684 A JP 23306684A JP 23306684 A JP23306684 A JP 23306684A JP H0480472 B2 JPH0480472 B2 JP H0480472B2
- Authority
- JP
- Japan
- Prior art keywords
- annular body
- metal disc
- recording medium
- disk
- annular
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 34
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気デイスクカートリツジなどに用
いられる記録媒体を具備する記録デイスクに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording disk equipped with a recording medium used in a magnetic disk cartridge or the like.
従来の記録デイスク１は、第４図および第５図
に示すように、ケース２にハブ３と記録媒体４を
露呈させるための透孔５ａ，５ｂを形成し、ハブ
３に形成した嵌合孔６ａ，６ｂを図示しない駆動
装置の支持手段に嵌着させ、また透孔５ｂを介し
て図示しない記録・再生ヘツドを記録媒体４に接
触させるようにしてある。
As shown in FIGS. 4 and 5, a conventional recording disk 1 has through holes 5a and 5b formed in a case 2 to expose a hub 3 and a recording medium 4, and a fitting hole formed in the hub 3. 6a and 6b are fitted into support means of a drive device (not shown), and a recording/reproducing head (not shown) is brought into contact with the recording medium 4 through the through hole 5b.
そして前記ハブ３の構造の一例として、合成樹
脂製のハブ３の外周に環状の金属円板７の内周部
を埋設している。この金属円板７の円周方向に第
６図を示す如く複数の透孔８と、隣り合う一組の
透孔８間毎に浅い連結溝１０が形成され、この透
孔８の下方に合成樹脂製の環状体９が設けられて
いる。この環状体９はケース２の透孔５ａ周側の
一部と当接し、ハブ３の位置規制をして、記録媒
体４のラジアル方向の動きを規制するものであ
る。この環状体９の基端部９ａは第 図に示すよ
うに金属円板７の透孔８内に形成され、しかも環
状体９を成形するときの溶融した合成樹脂の一部
は透孔８を通り連結溝１０（第 図参照）に回り
込み、その結果隣り合う一組の基端部９ａどうし
を連結するブリツジ部１１（第 図参照）を形成
する。前述のように環状体９を基端部９ａを透孔
８内に形成したり、隣り合う一組の基端部９ａど
うしを連結するブリツジ部１１を設けたりするの
は、金属円板７に対する環状体９の接合強度を高
めるためのものであるが、難点がない訳ではな
い。 As an example of the structure of the hub 3, the inner circumference of an annular metal disk 7 is embedded in the outer circumference of the hub 3 made of synthetic resin. As shown in FIG. 6 in the circumferential direction of this metal disk 7, a plurality of through holes 8 and shallow connecting grooves 10 are formed between each pair of adjacent through holes 8, and below these through holes 8, a connecting groove 10 is formed. A resin annular body 9 is provided. This annular body 9 comes into contact with a part of the circumferential side of the through hole 5a of the case 2, and regulates the position of the hub 3, thereby regulating the movement of the recording medium 4 in the radial direction. The base end 9a of this annular body 9 is formed in a through hole 8 of a metal disk 7 as shown in FIG. It wraps around the connecting groove 10 (see the figure), thereby forming a bridge portion 11 (see the figure) that connects a pair of adjacent base end portions 9a. As described above, forming the proximal end 9a of the annular body 9 in the through hole 8 and providing the bridge portion 11 connecting a pair of adjacent proximal ends 9a are done in accordance with the metal disc 7. Although this is intended to increase the bonding strength of the annular body 9, it is not without its drawbacks.
すなわち、金属円板７の連結溝１０はプレス加
工によつて形成するため、特に連結溝１０の周辺
では絞りによつて波打つたように変形し易い。こ
の金属円板７の上面には第５図に示す如くフレキ
シブルな記録媒体４が接着固定されるため、前述
のように金属円板７が周方向にわたつて変形して
平面度が低下しておれば、必然的に記録媒体４に
もその影響が現われ、金属円板７の変形に応じて
記録媒体４も波打つ。その結果、記録媒体４と磁
気ヘツド（図示せず）との接触状態が悪くなり、
記録媒体４の部分的な摩耗や磁気特性の低下をき
たす。 That is, since the connecting groove 10 of the metal disk 7 is formed by press working, the area around the connecting groove 10 is easily deformed into a undulating shape due to the aperture. Since the flexible recording medium 4 is adhesively fixed to the upper surface of the metal disk 7 as shown in FIG. If so, the influence will inevitably appear on the recording medium 4, and the recording medium 4 will also wave in response to the deformation of the metal disk 7. As a result, the contact between the recording medium 4 and the magnetic head (not shown) deteriorates.
This causes partial wear of the recording medium 4 and deterioration of magnetic properties.
また、連結溝１０は短形溝になつているため、
溝の深さを深くすると溝底部がせん断応力によつ
て切断されることがあるから、連結溝１０の深さ
を余り深くすることができない。そのためブリツ
ジ部１１を形成するときの合成樹脂の流れが悪く
成形性に問題があるばかりでなく、薄いブリツジ
部１１しかできないことから金属円板７に対する
環状体９の接合強度が十分でない。 In addition, since the connecting groove 10 is a rectangular groove,
If the depth of the groove is increased, the bottom of the groove may be cut by shear stress, so the depth of the connecting groove 10 cannot be made too deep. Therefore, when forming the bridge portion 11, the flow of the synthetic resin is poor and there is a problem in moldability, and since only a thin bridge portion 11 is formed, the bonding strength of the annular body 9 to the metal disk 7 is not sufficient.
本発明は、このような従来技術の欠点を解消
し、金属円板に対する環状体の接合強度が大で、
生産性が良く、記録媒体の変形がない記録デイス
クを提供するにある。
The present invention eliminates the drawbacks of the prior art, and has a high bonding strength of the annular body to the metal disc.
To provide a recording disk with good productivity and no deformation of the recording medium.
この目的を達成するため、本発明は、金属円板
の環状体が形成されるべき位置に金属円板の周方
向に沿つて複数の貫通穴を予め穿設せしめ、その
貫通穴を介して、金属円板の一方の面に突設され
る環状体と、その環状体と反対の面に突設される
環状リブとを合成樹脂により一体に形成したこと
を特徴とするものである。
In order to achieve this object, the present invention pre-drills a plurality of through holes along the circumferential direction of the metal disk at the position where the annular body is to be formed, and through the through holes, It is characterized in that an annular body protruding from one surface of a metal disk and an annular rib protruding from the opposite surface of the annular body are integrally formed of synthetic resin.
次に本発明の実施例について図とともに説明す
る。第１図は実施例に係る磁気デイスクカートリ
ツジの要部断面図、第２図はそのデイスクカート
リツジに用いられる金属円板の平面図、第３図は
金属円板と環状体ならびに環状リブとの接合部を
示す拡大断面図である。
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the main parts of a magnetic disk cartridge according to an embodiment, FIG. 2 is a plan view of a metal disk used in the disk cartridge, and FIG. FIG.
第１図に示すように合成樹脂製のハブ３の外周
部には、例えばオーステナイト系ステンレス鋼の
如き非磁性金属からなる環状の金属円板１２の内
周部が埋設されている。この金属円板１２のハブ
３に埋設される部分よりも径方向外側の位置に
は、第２図に示すように周方向に沿つて複数の円
形をした貫通穴１３が等間隔で穿設されている。 As shown in FIG. 1, the inner circumference of an annular metal disc 12 made of a non-magnetic metal such as austenitic stainless steel is embedded in the outer circumference of the hub 3 made of synthetic resin. As shown in FIG. 2, a plurality of circular through holes 13 are bored at equal intervals along the circumferential direction at a position on the outer side of the metal disk 12 in the radial direction than the part buried in the hub 3. ing.
この金属円板１２における貫通穴１３の下方に
は環状体１４が、また貫通穴１３の上方には環状
リブ１５がそれぞれアウトサート成形により貫通
穴１３を通して一体に連結されるように形成され
ている。第３図に示すように金属円板１２の貫通
穴１３の径は環状体１４ならびに環状リブ１５の
肉厚に対して0.5以上、好ましくは１〜３程度に
設計され、アウトサート成形時の合成樹脂の流れ
を良くしている。そして金属円板１２の各貫通穴
１３を合成樹脂で充填し、しかも貫通穴１３間を
またぐようにして環状リブ１５を環状体１４と対
向した位置に連続して形成することにより、金属
円板１２に対する環状体１４の接合が確実かつ強
固になる。 An annular body 14 is formed below the through hole 13 in the metal disk 12, and an annular rib 15 is formed above the through hole 13 by outsert molding so as to be integrally connected through the through hole 13. . As shown in FIG. 3, the diameter of the through hole 13 of the metal disk 12 is designed to be 0.5 or more, preferably about 1 to 3, relative to the wall thickness of the annular body 14 and the annular rib 15, and Improves resin flow. Then, each through hole 13 of the metal disk 12 is filled with synthetic resin, and an annular rib 15 is continuously formed at a position facing the annular body 14 so as to straddle the through holes 13. The connection of the annular body 14 to the annular body 12 becomes reliable and strong.
環状体１４は従来と同様にケース２の透孔５ａ
周側の一部を当接することによりハブ３の位置規
制をして、記録媒体４のラジアル方向の過度な動
きを規制している。 The annular body 14 is inserted into the through hole 5a of the case 2 as in the conventional case.
By abutting a part of the circumferential side, the position of the hub 3 is regulated, and excessive movement of the recording medium 4 in the radial direction is regulated.
一方環状リブ１５は金属円板１２に対する環状
体１４の接合を確実にするとともに、第１図に示
す如く記録媒体４が環状リブ１５に外嵌して記録
媒体４の位置決めにも役立つている。 On the other hand, the annular rib 15 not only ensures the bonding of the annular body 14 to the metal disk 12, but also serves to position the recording medium 4 by fitting the recording medium 4 onto the annular rib 15 as shown in FIG.
前記実施例では円形をした貫通穴１３の場合に
ついて説明したが、本発明はこれに限定されるも
のではなく、例えば環状体１４、環状リブ１５の
周方向に沿つて弧状の貫通穴を複数穿設すること
もできる。 In the embodiment described above, the case where the through hole 13 is circular is explained, but the present invention is not limited to this. It is also possible to set
前記実施例のように非磁性の金属円板１２を使
用すれば、記録媒体１４への磁気的な影響をなく
すことができる。 If the non-magnetic metal disc 12 is used as in the embodiment described above, magnetic influence on the recording medium 14 can be eliminated.
本発明は前述のように、絞り加工を施さない貫
通穴を有する金属円板を使用するから、金属円板
の変形に基づく記録媒体の変形が解消され、記録
媒体とヘツドとの位置関係が常に一定で、安定し
た特性が得られる。また、金属円板の貫通穴を通
して環状体と反対側に連続した環状リブを突設す
ることにより、金属円板に対する環状体の接合強
度が高められ、しかも環状リブは金属円板から突
設されるように形成されるから、従来のものに比
べて成形性が良く量産に適しているなど諸種の利
点を有している。
As described above, since the present invention uses a metal disk having a through hole that is not subjected to drawing processing, deformation of the recording medium due to deformation of the metal disk is eliminated, and the positional relationship between the recording medium and the head is always maintained. Constant and stable characteristics can be obtained. Furthermore, by providing a continuous annular rib protruding from the side opposite to the annular body through the through hole of the metal disc, the bonding strength of the annular body to the metal disc is increased. Since it is formed in a similar manner, it has various advantages over conventional products, such as better moldability and suitability for mass production.
第１図ないし第３図は本発明の記録デイスクを
説明するためのもので、第１図はその記録デイス
クを用いた磁気デイスクカートリツジの一部断面
図、第２図はその記録デイスクに用いる金属円板
の平面図、第３図はその記録デイスクの要部拡大
断面図である。第４図ないし第７図は従来の記録
デイスクを説明するためのもので、第４図および
第５図はその記録デイスクを用いた磁気デイスク
カートリツジの底面図および一部拡大断面図、第
６図はその記録デイスクに用いる金属円板の平面
図、第７図はその記録デイスクの一部拡大断面図
である。
３……ハブ、４……記録媒体、１２……金属円
板、１３……貫通穴、１４……環状体、１５……
環状リブ。
1 to 3 are for explaining the recording disk of the present invention, FIG. 1 is a partial sectional view of a magnetic disk cartridge using the recording disk, and FIG. 2 is a partial cross-sectional view of a magnetic disk cartridge used for the recording disk. A plan view of the metal disk, and FIG. 3 is an enlarged sectional view of the main part of the recording disk. 4 to 7 are for explaining a conventional recording disk, and FIGS. 4 and 5 are a bottom view and a partially enlarged sectional view of a magnetic disk cartridge using the recording disk, and FIG. The figure is a plan view of a metal disk used in the recording disk, and FIG. 7 is a partially enlarged sectional view of the recording disk. 3... Hub, 4... Recording medium, 12... Metal disc, 13... Through hole, 14... Annular body, 15...
annular rib.
Claims (1)
製のハブと、内周部を前記金属円板に接着固定す
る円盤状の記録媒体と、前記金属円板の記録媒体
接着面とは反対側の面に金属円板の周方向に沿つ
て突設された合成樹脂製の環状体とを備えた記録
デイスクにおいて、前記金属円板の環状体が形成
されるべき位置に金属円板の周方向に沿つて複数
個の貫通穴を穿設せしめ、その貫通穴を介して、
金属円板の一方の面に突設される前記環状体と、
その環状体と反対の面に突設される環状リブとを
合成樹脂により一体に形成したことを特徴とする
記録デイスク。1. A hub made of synthetic resin with an annular metal disc embedded in its outer periphery, a disc-shaped recording medium whose inner periphery is adhesively fixed to the metal disc, and a surface opposite to the recording medium adhesive surface of the metal disc. In a recording disk equipped with a synthetic resin annular body protruding along the circumferential direction of the metal disc on a side surface, the metal disc is provided with a ring around the metal disc at a position where the annular body is to be formed. A plurality of through holes are drilled along the direction, and through the through holes,
the annular body protruding from one surface of a metal disc;
A recording disk characterized in that the annular body and an annular rib protruding from the opposite surface are integrally formed of synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23306684A JPS61113178A (en) | 1984-11-07 | 1984-11-07 | Recording disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23306684A JPS61113178A (en) | 1984-11-07 | 1984-11-07 | Recording disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61113178A JPS61113178A (en) | 1986-05-31 |
| JPH0480472B2 true JPH0480472B2 (en) | 1992-12-18 |
Family
ID=16949265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23306684A Granted JPS61113178A (en) | 1984-11-07 | 1984-11-07 | Recording disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61113178A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2538206B2 (en) * | 1986-04-23 | 1996-09-25 | ティーディーケイ株式会社 | Hub for disk cartridge and manufacturing method thereof |
| JPH0722772Y2 (en) * | 1986-10-31 | 1995-05-24 | 富士写真フイルム株式会社 | Magnetic disk cartridge |
| CN1097276C (en) * | 1995-10-20 | 2002-12-25 | 欧姆龙株式会社 | Relay and matrix relay |
| JP4917315B2 (en) * | 2006-01-25 | 2012-04-18 | Ｕｄトラックス株式会社 | Vehicle air resistance reduction device |
| JP2008110628A (en) * | 2006-10-30 | 2008-05-15 | Kayaba Ind Co Ltd | Air guide plate structure |
-
1984
- 1984-11-07 JP JP23306684A patent/JPS61113178A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61113178A (en) | 1986-05-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |