JPS6020373A - Magnetic disk - Google Patents
Magnetic diskInfo
- Publication number
- JPS6020373A JPS6020373A JP12813183A JP12813183A JPS6020373A JP S6020373 A JPS6020373 A JP S6020373A JP 12813183 A JP12813183 A JP 12813183A JP 12813183 A JP12813183 A JP 12813183A JP S6020373 A JPS6020373 A JP S6020373A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- magnetic sheet
- magnetic
- sheet
- magnetic disk
- 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
- 239000007769 metal material Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
- G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
- G11B23/0028—Details
- G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
Abstract
Description
【発明の詳細な説明】
この発明は磁気ディスクに係り、磁気シートの変形防止
を目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk, and an object thereof is to prevent deformation of a magnetic sheet.
第１図および第２図に示す如き磁気ディスクカートリッ
ジは硬質プラスチック製のディスクケース１と、該ケー
ス１に可回転に内装される磁気ディスク２とからなる。A magnetic disk cartridge as shown in FIGS. 1 and 2 consists of a disk case 1 made of hard plastic and a magnetic disk 2 rotatably housed within the case 1.
このディスクケース１は上下ケース１ａ・１ｂを蓋合わ
せ状に結合してなり。This disc case 1 is made up of upper and lower cases 1a and 1b joined together with lids.
略中央部に駆動軸挿入窓３を、これの前後にヘッド挿入
窓４とインデックス孔５とをそれぞれ上下貫通状に形成
しｔなる。磁気ディスク２は磁気シート６と該シート６
の中央部に一体結合されて前記駆動軸挿入窓３に臨むハ
ブ７とからなり、駆動軸挿入窓３を介して駆動装置側の
ふたつの駆動ピンがハブ７に二点で係合してディスク２
を回転駆動するものとなっている。A drive shaft insertion window 3 is formed approximately at the center, and a head insertion window 4 and an index hole 5 are formed in front and rear of the drive shaft insertion window 3 in a vertically penetrating manner. The magnetic disk 2 includes a magnetic sheet 6 and the sheet 6.
A hub 7 is integrally connected to the central part of the disc and faces the drive shaft insertion window 3, and two drive pins on the drive device side engage the hub 7 at two points through the drive shaft insertion window 3, and the disc 2
It is designed to rotate.
しかるに、そのハブ７は上下のハブ構成体７ａ・７ｂか
らなり１両ハブ構成体７ａ・７ｂの接合面間で磁気シー
ト６の内周縁部を挟持固定しているが、このハブ７は一
般にプラスチック製である。However, the hub 7 is composed of upper and lower hub components 7a and 7b, and the inner peripheral edge of the magnetic sheet 6 is clamped and fixed between the joint surfaces of the two hub components 7a and 7b, but this hub 7 is generally made of plastic. Made in Japan.
それはディスクドライブ側の駆動ピンが金属製であるか
らハブ７も金属製だと、繰り返し継続使用するに伴い駆
動ピン又はハブのいずれか一方が摩耗してディスクドラ
イブ側のハブ受台とコレットによるハブのチャッキング
精度が悪くなるからである。Since the drive pin on the disk drive side is made of metal, if the hub 7 is also made of metal, either the drive pin or the hub will wear out with repeated use and the hub holder and collet on the disk drive side will form a hub. This is because the chucking accuracy deteriorates.
しかし２本発明者の観察したところによると。However, according to two observations made by the present inventor.
プラスチック製のハブ７は温湿度による膨張や収縮度形
が、ポリエステルなどのベースフィルム上に磁性膜を形
成した磁気シート６よりも大きいため、ハブ７の変形で
両ハブ構成体７ａ・７ｂ間に挟着された磁気シート６が
変形して波打ち状になり、これが出力変動やトランクず
れの発生原因になっていることを知った。The plastic hub 7 has a larger degree of expansion and contraction due to temperature and humidity than the magnetic sheet 6, which has a magnetic film formed on a base film such as polyester. I learned that the sandwiched magnetic sheet 6 is deformed and becomes wavy, which causes output fluctuations and trunk displacement.
この発明は、かかる事実に着目して、プラスチック製ハ
ブの長所すなわち駆動ピンやハブの摩耗防止およびチャ
ッキング精度の維持を保有しつつプラスチック製ハブが
温湿度条件で変形しても磁気シートに悪影響が及ばない
磁気ディスクを得ることを目的とするものであり、その
特徴とするところはプラスチック製ハブ７を構成する上
下のハブ構成体７ａ・７ｂの少なくとも一方のハブ構成
体の磁気シート６を挟着する受面が、磁気シート６より
熱膨張係数の小さい金属材からなるものとした点にある
。なお１本発明に係る磁気ディスク２は第１図および第
２図に示す如く硬質のディスクケース１に内蔵されるも
のに限られず３例えばケース１から磁気ディスク２が取
り出されて回転駆動される形態にも適用して有効であり
、従ってディスクケース１の有無は問わない。Focusing on this fact, the present invention maintains the advantages of a plastic hub, that is, prevention of wear on drive pins and hubs, and maintenance of chucking accuracy, while also having an adverse effect on the magnetic sheet even if the plastic hub is deformed due to temperature and humidity conditions. The purpose of this is to obtain a magnetic disk that cannot be reached by magnetic disks, and its feature is that the magnetic sheet 6 of at least one of the upper and lower hub structures 7a and 7b of the plastic hub 7 is sandwiched between the magnetic sheets 6 of at least one of the upper and lower hub structures 7a and The receiving surface to which the magnetic sheet 6 is attached is made of a metal material having a smaller coefficient of thermal expansion than the magnetic sheet 6. Note that the magnetic disk 2 according to the present invention is not limited to the one built in a hard disk case 1 as shown in FIGS. It is also effective when applied to the disc case 1, and therefore, it does not matter whether the disc case 1 is included or not.
第３図および第４図は本発明に係る磁気ディスク２を例
示しており、これはドーナツ盤状の磁気シート６と、該
磁気シート６の内周縁部６ａに装着されるハブ７とから
なる。ハブ７はボリアリレート、ポリアセタール等のプ
ラスチック材で形成された上下のハブ構成体７ａ・７ｂ
からなり、下側ハブ構成体７ｂの接合面から突設した数
本の結合ピン８を上側ハブ構成体７ａに設けた通孔９に
挿入して超音波溶接でカシメ付けることにより。3 and 4 illustrate the magnetic disk 2 according to the present invention, which consists of a donut-shaped magnetic sheet 6 and a hub 7 attached to the inner peripheral edge 6a of the magnetic sheet 6. . The hub 7 includes upper and lower hub components 7a and 7b made of a plastic material such as polyarylate or polyacetal.
By inserting several coupling pins 8 protruding from the joint surface of the lower hub structure 7b into the through holes 9 provided in the upper hub structure 7a and caulking them by ultrasonic welding.
両ハブ構成体７ａ・７ｂが一体接合される。そして、こ
の両ハブ構成体７ａ・７ｂの接合面間で磁気シート６の
内周縁部６ａが挟持固定される。より詳しくは磁気シー
ト６の内周縁部６ａは両ハブ構成体７ａ・７ｂの接合面
上における前記結合ピン８の外周部分に成形された所定
幅の円環状リブ１０・１０の突き合わせ面間で挟持固定
される。Both hub components 7a and 7b are integrally joined. Then, the inner circumferential edge 6a of the magnetic sheet 6 is clamped and fixed between the joint surfaces of both the hub components 7a and 7b. More specifically, the inner peripheral edge 6a of the magnetic sheet 6 is sandwiched between the abutting surfaces of annular ribs 10 of a predetermined width formed on the outer peripheral portion of the coupling pin 8 on the joint surfaces of both hub components 7a and 7b. Fixed.
ハブ７の上下端面ばディスクケース１の駆動軸挿入窓３
・３に臨んでおり、この上下端面の中央にディスクドラ
イブ側のふたつの駆動ピンの一方が係入する中心あな１
１を有し、ハブ７の上下端面の中心あな１１まわりに他
方の駆動ピンが係入するガイド溝１２を有する。The upper and lower end surfaces of the hub 7 and the drive shaft insertion window 3 of the disk case 1
・The center hole 1 faces 3, and one of the two drive pins on the disk drive side engages in the center of this upper and lower end surface.
1, and has a guide groove 12 around a center hole 11 on the upper and lower end surfaces of the hub 7, into which the other drive pin engages.
本発明では両ハブ構成体７ａ・７ｂの接合面間における
下側ハブ構成体７ｂの環状リブ１０の端面、すなわち磁
気シート６の内周縁部６ａを挟着する受面を磁気シート
６と熱膨張係数が大略等しい金属材１３で構成する。具
体的には、第１にハブ７の前記挟着面にアルミ等の金属
蒸着またはプラズマ処理を施すことが挙げられる。第２
に、熱による歪が小さいステンレス板（０，１ｍｍ厚程
度のもの）、あるいはその他にリン青銅板、白銅などの
薄い金属板をハブ７の該挟着面に重ねて貼りつけること
が挙げられる。なお、金属材１３と磁気シート６の内周
縁部６ａとは念の為に接着剤で固着しておくことが望ま
れる。磁気シート６がポリエステルフィルムベースに磁
性塗膜をのせたものである場合、その熱膨張係数は１７
Ｘ１０／’Ｃであるから、熱膨張係数が１０〜２４Ｘ
１０／“Ｃの範囲の金属材１３を用いることが望ましい
。In the present invention, the end surface of the annular rib 10 of the lower hub structure 7b between the joining surfaces of both the hub structures 7a and 7b, that is, the receiving surface that sandwiches the inner peripheral edge 6a of the magnetic sheet 6, is thermally expanded with the magnetic sheet 6. It is made of metal material 13 having approximately the same coefficient. Specifically, firstly, the sandwiching surface of the hub 7 is subjected to metal vapor deposition such as aluminum or plasma treatment. Second
Another method is to attach a stainless steel plate (about 0.1 mm thick) that is less distorted by heat, or a thin metal plate such as a phosphor bronze plate or cupronickel to the clamping surface of the hub 7. Note that it is preferable that the metal material 13 and the inner circumferential edge 6a of the magnetic sheet 6 be fixed together with an adhesive just in case. When the magnetic sheet 6 is made of a polyester film base with a magnetic coating, its coefficient of thermal expansion is 17.
Since it is X10/'C, the thermal expansion coefficient is 10 to 24X
It is desirable to use a metal material 13 in the range of 10/"C.
しかるときは、駆動軸挿入窓３に臨むハブ７の上下端面
および中心あなＩＩの内周面はプラスデック材のままで
あるので、これらにディスクドライブ側の駆動ピンが係
入しても摩耗することがなくてチャッキング精度の悪化
を防ぐことができる。In this case, the upper and lower end surfaces of the hub 7 facing the drive shaft insertion window 3 and the inner peripheral surface of the center hole II are still made of plastic deck material, so even if the drive pin on the disk drive side gets into them, they will wear out. This prevents deterioration of chucking accuracy.
そして、ハブ７が温度や湿度条件により変形しても、こ
の変形は金属材１３で受け止められて磁気シート６に影
響を及ぼすことを可及的に抑止する。Even if the hub 7 is deformed due to temperature or humidity conditions, this deformation is received by the metal material 13 and is prevented from affecting the magnetic sheet 6 as much as possible.
したがって磁気シート６が変形しなくなるに至ったもの
である。Therefore, the magnetic sheet 6 no longer deforms.
上側ハブ構成体７ａのシート内周縁部６ａの挟着受面を
も上記金属材１３で構成してもよく、また両ハブ構成体
７ａ・７ｂの双方の挟着面に金属材１３を貼着してあっ
てもよい。The clamping receiving surface of the inner peripheral edge 6a of the seat of the upper hub component 7a may also be made of the metal material 13, or the metal material 13 may be attached to the clamping surfaces of both hub components 7a and 7b. You may do so.
なお、第５図に示す如くハブ構成体７ｂはシート挟着受
面を含む一部が金属板１３で形成されていてもよい。つ
まり、ハブ７は中心あな１１に臨む内周部分の大半がプ
ラスチック材で成形されいる限り、そのハブ構成体７ａ
・７ｂの一部が金属製であってもよい。そうした場合に
はその金属面で直接にシート内周縁部分６ａを挟着する
を以て足りる。Incidentally, as shown in FIG. 5, a portion of the hub structure 7b including the sheet clamping receiving surface may be formed of the metal plate 13. In other words, as long as most of the inner circumferential portion of the hub 7 facing the center hole 11 is molded from a plastic material, the hub structure 7a
- A part of 7b may be made of metal. In such a case, it is sufficient to directly clamp the inner peripheral edge portion 6a of the sheet between the metal surfaces.
一以上説明したように、この発明によれば、プラスチッ
ク製の上下のハブ構成体７ａ・７ｂの少なくとも一方の
ハブ構成体におけるシート内周縁部６ａの挟着受面が金
属材１３からなるものとしたので、ハブ７およびディス
クドライブ側の駆動ピンの摩耗を無くせてチャッキング
精度を良好に維持できる。そのうえでハブ７が温湿度条
件により変形しても、金属材１３がハブ７の変形に抵抗
して柔軟な磁気シート６が変形するのを抑止するので、
磁気シート６の変形による出力変動やトランクずれなど
のトラブル発生を防止するに有利である。As described above, according to the present invention, the clamping receiving surface of the inner peripheral edge portion 6a of the seat in at least one of the upper and lower plastic hub members 7a and 7b is made of the metal material 13. Therefore, wear of the hub 7 and the drive pin on the disk drive side can be eliminated, and chucking accuracy can be maintained well. Furthermore, even if the hub 7 deforms due to temperature and humidity conditions, the metal material 13 resists the deformation of the hub 7 and prevents the flexible magnetic sheet 6 from deforming.
This is advantageous in preventing troubles such as output fluctuations and trunk displacement due to deformation of the magnetic sheet 6.
第１図は本発明に係る磁気ディスクの代表的な適用例を
示す磁気ディスカートリッジの斜視図。
第２図は第１図における■−■線断面図である。
第３図は本発明に係る磁気ディスクの要部の拡大断面図
、第４図はその一部拡断面図である。
第５図は本発明にかかる磁気ディスクの別実施例を示す
一部拡大断面図である。
１・−・・ディスクケース。
２・・・・磁気ディスク。
６・・・・磁気シート。
７・・・・ハブ。
７ａ・７ｂ・・・ハブ構成体。
１３・・・金属材。FIG. 1 is a perspective view of a magnetic disk cartridge showing a typical application example of the magnetic disk according to the present invention. FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1. FIG. 3 is an enlarged sectional view of a main part of a magnetic disk according to the present invention, and FIG. 4 is a partially enlarged sectional view thereof. FIG. 5 is a partially enlarged sectional view showing another embodiment of the magnetic disk according to the present invention. 1.--Disc case. 2...Magnetic disk. 6...Magnetic sheet. 7...Hub. 7a, 7b...Hub structure. 13...Metal material.
Claims (1)
なるプラスチック製のハブ７とを有し１両ハブ構成体７
ａ・７ｂの接合面間で磁気シート６の内周縁部６ａを挟
着してなる磁気ディスクにおいて３両ハブ構成体７ａ・
７ｂのうち少なくとも一方のハブ構成体の前記シート内
周縁部６ａを挟着する受面が金属材１３からなることを
特徴とする磁気ディスク(1) A one-car hub structure 7 having a magnetic sheet 6 and a plastic hub 7 consisting of upper and lower hub structures 7a and 7b.
In a magnetic disk formed by sandwiching the inner circumferential edge 6a of the magnetic sheet 6 between the joining surfaces of the hubs 7a and 7b, there are three hub structures 7a and 7b.
A magnetic disk characterized in that a receiving surface for sandwiching the sheet inner peripheral edge 6a of at least one of the hub components 7b is made of a metal material 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12813183A JPS6020373A (en) | 1983-07-13 | 1983-07-13 | Magnetic disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12813183A JPS6020373A (en) | 1983-07-13 | 1983-07-13 | Magnetic disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6020373A true JPS6020373A (en) | 1985-02-01 |
Family
ID=14977161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12813183A Pending JPS6020373A (en) | 1983-07-13 | 1983-07-13 | Magnetic disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6020373A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4704649A (en) * | 1984-12-20 | 1987-11-03 | Fuji Photo Film Co., Ltd. | Magnetic disk cartridge |
| US4877667A (en) * | 1986-07-22 | 1989-10-31 | Mitsubishi Denki Kabushiki Kaisha | Optical disc with inhibited thermal distortion |
| US4920441A (en) * | 1985-03-13 | 1990-04-24 | Nippon Telegraph and Telehpone Corp. | Flexible magnetic diskette |
| JPH0260968U (en) * | 1988-10-21 | 1990-05-07 | ||
| US4941066A (en) * | 1988-05-11 | 1990-07-10 | Shape Inc. | Injection molded center core for a recording disc and related method of manufacture |
-
1983
- 1983-07-13 JP JP12813183A patent/JPS6020373A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4704649A (en) * | 1984-12-20 | 1987-11-03 | Fuji Photo Film Co., Ltd. | Magnetic disk cartridge |
| US4920441A (en) * | 1985-03-13 | 1990-04-24 | Nippon Telegraph and Telehpone Corp. | Flexible magnetic diskette |
| US4877667A (en) * | 1986-07-22 | 1989-10-31 | Mitsubishi Denki Kabushiki Kaisha | Optical disc with inhibited thermal distortion |
| US4941066A (en) * | 1988-05-11 | 1990-07-10 | Shape Inc. | Injection molded center core for a recording disc and related method of manufacture |
| JPH0260968U (en) * | 1988-10-21 | 1990-05-07 |
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