JPH073482Y2 - Magnetic disk body - Google Patents
Magnetic disk bodyInfo
- Publication number
- JPH073482Y2 JPH073482Y2 JP1033590U JP1033590U JPH073482Y2 JP H073482 Y2 JPH073482 Y2 JP H073482Y2 JP 1033590 U JP1033590 U JP 1033590U JP 1033590 U JP1033590 U JP 1033590U JP H073482 Y2 JPH073482 Y2 JP H073482Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- metal plate
- disk body
- hub
- inner peripheral
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 40
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk carriers
-
- 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
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、磁気ディスク体、更に詳しくは、磁気ディス
クが固定される金属板の構造を改良した磁気ディスク体
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a magnetic disk body, and more particularly to a magnetic disk body having an improved metal plate structure to which the magnetic disk is fixed.
〔従来の技術〕 従来の磁気ディスク体、特に２インチの磁気ディスクに
用いられる磁気ディスク体を第３図〜第６図を参照しな
がら説明する。[Prior Art] A conventional magnetic disk body, particularly a magnetic disk body used for a 2-inch magnetic disk will be described with reference to FIGS. 3 to 6.
従来の２インチの磁気ディスクは、第３図に示す如く、
ケース１と該ケース１内に回転自在に収納された磁気デ
ィスク体２とを備えて構成されている。A conventional 2-inch magnetic disk is as shown in FIG.
A case 1 and a magnetic disk body 2 rotatably housed in the case 1 are provided.
上記ケース１には、上記磁気ディスク体２の中央に取り
付けられた合成樹脂からなるハブが臨む円孔1Aと、該円
孔1Aに隣接し、記録・再生用の磁気ヘッドが臨む矩形状
の窓1Bとが形成され、また、該ケース１の一側縁には、
第３図矢示方向に往復動して窓1Bを開閉するシャッター
Ｓが摺動自在に取り付けられている。The case 1 has a circular hole 1A facing a hub made of a synthetic resin attached to the center of the magnetic disk body 2 and a rectangular window adjacent to the circular hole 1A and facing a recording / reproducing magnetic head. 1B is formed, and at one side edge of the case 1,
A shutter S that reciprocates in the direction of the arrow in FIG. 3 to open and close the window 1B is slidably attached.
而して、上記磁気ディスク体２は、第３図、第４図に示
す如く、円環状の金属板３と、該金属板３の内周縁部を
被覆するように取り付けられた合成樹脂製のハブ４と、
該ハブ４を嵌入させて上記金属板３の一方の面に取り付
けられた磁気ディスク５とを備えて構成されている。ま
た、該金属板３の内周縁には、第４図に示す如く、磁気
ディスク５を取り付ける一方の面側に突出する突起3Aが
折曲形成され且つその先端が表面に露呈するように上記
ハブ４内に埋設されている。そして、磁気ディスク体２
が回転する際、該突起3Aによって基準位置を設定するよ
うになされている。As shown in FIGS. 3 and 4, the magnetic disk body 2 is made of a synthetic resin and is made of synthetic resin. The annular metal plate 3 is attached to cover the inner peripheral edge of the metal plate 3. Hub 4
The magnetic disk 5 is fitted with the hub 4 and is attached to one surface of the metal plate 3. Further, as shown in FIG. 4, a protrusion 3A projecting to one surface side where the magnetic disk 5 is attached is bent and formed on the inner peripheral edge of the metal plate 3 so that the tip thereof is exposed on the surface. It is buried in 4. And the magnetic disk body 2
When is rotated, the reference position is set by the protrusion 3A.
また、上記金属板３の内周縁部に、第５図に示す如く、
上記突起3Aに対向する側にある金属端面3B、3Bそれぞれ
に接近する位置に一対の小孔3C、3Cが形成され、該小孔
3C、3Cで上記金属板３の両面の内周縁部を被覆するハブ
４が連結固定されている（第６図参照）。Further, as shown in FIG. 5, on the inner peripheral edge of the metal plate 3,
A pair of small holes 3C, 3C are formed at positions close to the metal end faces 3B, 3B on the side facing the protrusion 3A, respectively.
Hubs 4 covering the inner peripheral edge portions of both surfaces of the metal plate 3 are connected and fixed by 3C, 3C (see FIG. 6).
また、上記金属板３の他方の面には、合成樹脂からなる
リング６が取り付けられ（第４図参照）、該リング６が
上記ケース１を形成する下シェル11の円孔11Aに嵌入し
て磁気ディスク体２を収納位置に規制するようになされ
ている一方、上記金属板３の外周縁部が上記円孔11Aに
おいて下シェル11に支持されて、磁気ディスク体２が自
由に回転し得るようになされている。尚、12は上シェル
である。A ring 6 made of synthetic resin is attached to the other surface of the metal plate 3 (see FIG. 4), and the ring 6 is fitted into the circular hole 11A of the lower shell 11 forming the case 1. While the magnetic disk body 2 is restricted to the storage position, the outer peripheral edge of the metal plate 3 is supported by the lower shell 11 in the circular hole 11A so that the magnetic disk body 2 can freely rotate. Has been done. In addition, 12 is an upper shell.
しかしながら、従来は、前記小孔3C、3Cを打ち抜き加工
によって金属板３に設けるようにしていたが、この方法
では打ち抜き加工用のピン状の治具に折損をもたらすこ
とがあり、そのために生産性が低下するという課題があ
った。また、折損の事実に気付かずに加工を続行すると
小孔3C、3Cのない金属板３にハブ４を取り付けるため、
ハブ４が内周縁部に固定されずため、ハブ４が位置ずれ
あるいは収縮し易くなってハブ４のスピンドル軸受け面
の精度が低下するという課題があった。However, conventionally, the small holes 3C, 3C were provided on the metal plate 3 by punching, but this method may cause breakage in the pin-shaped jig for punching, which results in productivity. However, there was a problem that If the machining is continued without noticing the fact of breakage, the hub 4 will be attached to the metal plate 3 without the small holes 3C, 3C.
Since the hub 4 is not fixed to the inner peripheral edge portion, there is a problem that the hub 4 is easily displaced or contracted, and the accuracy of the spindle bearing surface of the hub 4 decreases.
従って、本考案の目的は、ハブの位置ずれ、収縮を防止
してスピンドル軸受け面の精度を向上させることができ
ると共に、生産性を向上させることができる磁気ディス
ク体を提供することにある。Therefore, an object of the present invention is to provide a magnetic disk body capable of preventing displacement and contraction of the hub, improving the accuracy of the spindle bearing surface, and improving productivity.
本考案は、内周縁の一部に突起を有する円環状の金属板
と、該金属板の内周縁部を被覆して取り付けられたハブ
とを備えた磁気ディスク体において、上記内周縁部で且
つスピンドル軸受面が形成される近傍に、細長形状の切
込み部が上記内周縁部に沿って形成されており、該切込
みにおいて上記金属板の両面の内周縁部を被覆する上記
ハブが連結固定されていることを特徴とする磁気ディス
ク体を提供することにより上記目的を達成したものであ
る。The present invention relates to a magnetic disk body including an annular metal plate having a protrusion on a part of an inner peripheral edge thereof, and a hub attached to cover the inner peripheral edge portion of the metal plate. An elongated notch is formed along the inner peripheral edge in the vicinity of the spindle bearing surface, and the hub covering the inner peripheral edges of both sides of the metal plate is connected and fixed at the notch. The above object is achieved by providing a magnetic disk body characterized by the above.
本考案によれば、ハブを射出成形する際に、金属板の内
周縁部における細長形状の切込み部にモールド用樹脂が
侵入した状態で固化してハブが形成されて金属板の内周
縁部に固定される。According to the present invention, when the hub is injection-molded, the hub is formed by solidifying the molding resin in the elongated notch in the inner peripheral edge of the metal plate to form the hub on the inner peripheral edge of the metal plate. Fixed.
以下、第１図及び第２図に示す実施例に基づいて本考案
を説明する。尚、従来の磁気ディスク体と同一または相
当部分には同一符号を付してその説明を省略し、本考案
の特徴部分である金属板の構成を中心に説明する。The present invention will be described below based on the embodiments shown in FIGS. 1 and 2. It should be noted that the same or corresponding portions as those of the conventional magnetic disk body are denoted by the same reference numerals and the description thereof is omitted, and the configuration of the metal plate which is a characteristic portion of the present invention will be mainly described.
第１図は本考案の磁気ディスク体の一実施例に用いられ
る金属板を示す平面図、第２図は本考案の磁気ディスク
体の他の実施例に用いられる金属板を示す平面図で、本
実施例の磁気ディスク体２は、金属板３を除き従来品と
同様に構成されている。FIG. 1 is a plan view showing a metal plate used in an embodiment of the magnetic disk body of the present invention, and FIG. 2 is a plan view showing a metal plate used in another embodiment of the magnetic disk body of the present invention. The magnetic disk body 2 of this embodiment has the same structure as the conventional product except for the metal plate 3.
本実施例の磁気ディスク体２に用いられる金属板３は、
中央孔が略七角形を呈する左右対称に形成されており、
その一角に前述した突起3Aが金属板３の面に対して垂直
方向に折曲形成されている。The metal plate 3 used in the magnetic disk body 2 of this embodiment is
The central hole is formed symmetrically with a heptagonal shape,
The above-mentioned projection 3A is bent and formed in one of the corners in a direction perpendicular to the surface of the metal plate 3.
また、該突起3Aと対向する位置には、第１図に示す如
く、上記金属板３の内周縁に沿った略円弧状を呈する細
長形状の切込み部3Dが上記中央孔と一体に形成されてい
る。即ち、該切込み部3Dと上記中央孔との間に略蟹の爪
状を呈する一対の支持部3E、3Eが形成されることにな
り、該支持部3E、3Eが上記ハブ４の内部に埋設されて上
記ハブ４を固定するように構成されている。Further, as shown in FIG. 1, an elongated cut portion 3D having a substantially arc shape along the inner peripheral edge of the metal plate 3 is integrally formed with the central hole at a position facing the protrusion 3A. There is. That is, a pair of support parts 3E, 3E having a substantially crab-like shape are formed between the cutout part 3D and the central hole, and the support parts 3E, 3E are embedded inside the hub 4. Thus, the hub 4 is fixed.
本実施例の磁気ディスク体２によれば、細長形状の切込
み部3Dによって細長形状の支持部3E、3Eを形成し、合成
樹脂でハブ４を金属板３の内周縁において射出成形する
際、該支持部3E、3Eがハブ４内に埋設されてハブ４を固
定する。According to the magnetic disk body 2 of the present embodiment, the elongated support portions 3E, 3E are formed by the elongated cut portions 3D, and when the hub 4 is injection-molded on the inner peripheral edge of the metal plate 3 with the synthetic resin, The support portions 3E, 3E are embedded in the hub 4 to fix the hub 4.
以上説明した如く、本実施例の磁気ディスク体２は、ハ
ブ４を取り付ける金属板３の上記の金属面3B、3Bに切込
み部3Dを設けて一対の支持部3E、3Eを形成したことか
ら、該支持部3E、3Eがハブ４内でハブ自体を固定する部
材として作用するため、該金属板３に射出成形によって
取り付けられたハブ４が初期の位置から位置ずれする虞
れがない。また、該支持部3E、3Eで固定されたハブ４は
収縮しようとしても支持部3E、3Eによって確実に拘束さ
れてハブ４が収縮する虞れがなく、ハブ４のスピンドル
軸受け面の精度不良を防止して磁気ディスクカートリッ
ジの性能低下を防止することができる。As described above, in the magnetic disk body 2 of the present embodiment, the metal plate 3 to which the hub 4 is attached has the cut portions 3D formed on the metal surfaces 3B and 3B to form the pair of support portions 3E and 3E. Since the supporting portions 3E, 3E act as members for fixing the hub itself in the hub 4, there is no risk that the hub 4 attached to the metal plate 3 by injection molding will be displaced from the initial position. Further, even if the hub 4 fixed by the supporting portions 3E, 3E tries to contract, there is no risk that the hub 4 will be contracted by the supporting portions 3E, 3E, and the hub 4 will contract. It is possible to prevent deterioration of the performance of the magnetic disk cartridge.
また、上記切込み部3D、3Dは、金属板３の七角形の中央
孔と一体に設けられるため、従来のように治具を折損す
るようなことがなく、磁気ディスク体２の歩留まりを高
め生産性の向上を図ることができる。Further, since the notches 3D and 3D are integrally provided with the heptagonal central hole of the metal plate 3, the jig is not broken as in the conventional case, and the yield of the magnetic disk bodies 2 is increased. It is possible to improve the sex.
また、第２図は本考案の磁気ディスク体の他の実施例を
示す図で、本実施例における金属板３では、同図に示す
如く、略七角形の相対向する二対の角部のうち突起3Aか
ら離れた方の一対の角部からそれぞれ内周縁に沿い且つ
上記突起3Aから遠い方向に一対の細長形状の切込み部3
D、3Dが上記中央孔と一体に形成され、上記実施例とは
逆方向に延びる一対の細長形状の支持部3E、3Eを形成し
ている。従って、本実施例においても一対の細長形状の
切込み部3D、3Dによって一対の細長形状の支持部3E、3E
が形成されるため、上記実施例と同様の作用、効果を期
することができる。FIG. 2 is a view showing another embodiment of the magnetic disk body of the present invention. In the metal plate 3 in this embodiment, as shown in FIG. A pair of elongated cutouts 3 along the inner peripheral edge of each of the pair of corners away from the protrusion 3A and in the direction away from the protrusion 3A.
D and 3D are integrally formed with the central hole to form a pair of elongated support portions 3E and 3E extending in the opposite direction to the above-described embodiment. Therefore, also in this embodiment, the pair of elongated support portions 3E, 3E are formed by the pair of elongated cut portions 3D, 3D.
Thus, the same action and effect as those of the above-mentioned embodiment can be expected.
尚、本考案における切込み部は、内周縁部で且つスピン
ドル軸受面が形成される近傍に、内周縁部に沿って細長
形状に形成されておれば、これに伴って細長形状の支持
部が金属板の内周縁部に形成されるため、切込み部の形
状、個数は上記実施例に何ら制限されるものではない。In addition, if the notch in the present invention is formed in an elongated shape along the inner peripheral edge in the vicinity of the inner peripheral edge and the spindle bearing surface is formed, the elongated support part is made of metal. Since it is formed on the inner peripheral edge of the plate, the shape and the number of cuts are not limited to those in the above embodiment.
また、切込み部の先端は、第１図、第２図に示されてい
るように、切込み部の始点を基準にして、スピンドル軸
受面を形成する辺の少なくとも1/2以上の長さのところ
まで達しているのが好ましい。Further, as shown in FIGS. 1 and 2, the tip of the notch is at least at a half or more of the side forming the spindle bearing surface with reference to the starting point of the notch. Preferably has reached.
本考案の磁気ディスク体は、金属板の内周縁部で且つス
ピンドル軸受面が形成される近傍に切込み部を形成する
ことによって、ハブの位置ずれ、収縮を防止してスピン
ドル軸受け面の精度を向上させることができると共に、
生産性を向上させることができるものである。In the magnetic disk body of the present invention, by forming the notch in the inner peripheral edge of the metal plate and in the vicinity of the spindle bearing surface, the hub is prevented from being displaced and contracted to improve the accuracy of the spindle bearing surface. Can be made
The productivity can be improved.
第１図は本考案の磁気ディスク体の一実施例に用いられ
る金属板を示す平面図、第２図は本考案の磁気ディスク
体の他の実施例に用いられる金属板を示す平面図、第３
図は２インチの磁気ディスクカートリッジの外観を示す
平面図、第４図は従来の磁気ディスク体の要部を示す断
面図、第５図は第４図の磁気ディスク体に用いられた金
属板を示す平面図、第６図は第５図に示す金属板へのハ
ブの固定態様を示す要部断面図である。 2;磁気ディスク体 3;金属板、3A;突起 3D;切込み部、4;ハブの樹脂部FIG. 1 is a plan view showing a metal plate used in one embodiment of the magnetic disk body of the present invention, and FIG. 2 is a plan view showing a metal plate used in another embodiment of the magnetic disk body of the present invention. Three
FIG. 4 is a plan view showing the appearance of a 2-inch magnetic disk cartridge, FIG. 4 is a cross-sectional view showing the main part of a conventional magnetic disk body, and FIG. 5 is a metal plate used in the magnetic disk body of FIG. 6 is a plan view shown in FIG. 6, and FIG. 6 is a sectional view of an essential part showing a manner of fixing the hub to the metal plate shown in FIG. 2; magnetic disk body 3; metal plate, 3A; protrusion 3D; cut portion, 4; hub resin portion
Claims (1)
板と、該金属板の内周縁部を被覆して取付けられたハブ
とを備えた磁気ディスク体において、上記内周縁部で且
つスピンドル軸受面が形成される近傍に、細長形状の切
込み部が上記内周縁部に沿って形成されており、該切込
みにおいて上記金属板の両面の内周縁部を被覆する上記
ハブが連結固定されていることを特徴とする磁気ディス
ク体。1. A magnetic disk body comprising an annular metal plate having a protrusion on a part of the inner peripheral edge thereof, and a hub mounted so as to cover the inner peripheral edge of the metal plate. An elongated notch is formed along the inner peripheral edge in the vicinity of the spindle bearing surface, and the hub covering the inner peripheral edges of both sides of the metal plate is connected and fixed at the notch. A magnetic disk body characterized by being.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1033590U JPH073482Y2 (en) | 1990-02-05 | 1990-02-05 | Magnetic disk body |
| DE9101156U DE9101156U1 (en) | 1990-02-05 | 1991-02-01 | Magnetic plate body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1033590U JPH073482Y2 (en) | 1990-02-05 | 1990-02-05 | Magnetic disk body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03102179U JPH03102179U (en) | 1991-10-24 |
| JPH073482Y2 true JPH073482Y2 (en) | 1995-01-30 |
Family
ID=11747330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1033590U Expired - Lifetime JPH073482Y2 (en) | 1990-02-05 | 1990-02-05 | Magnetic disk body |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH073482Y2 (en) |
| DE (1) | DE9101156U1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6134081A (en) | 1997-08-29 | 2000-10-17 | Iomega Corporation | Media hub mounting system for minimizing Z-axis during cartridge insertion and ejection translation |
| US5999382A (en) * | 1997-08-29 | 1999-12-07 | Iomega Corporation | Apparatus for restraining lateral movement of disk medium within a cartridge shell |
-
1990
- 1990-02-05 JP JP1033590U patent/JPH073482Y2/en not_active Expired - Lifetime
-
1991
- 1991-02-01 DE DE9101156U patent/DE9101156U1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03102179U (en) | 1991-10-24 |
| DE9101156U1 (en) | 1991-04-25 |
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