JPH04119552A - Disk for recording - Google Patents
Disk for recordingInfo
- Publication number
- JPH04119552A JPH04119552A JP2237177A JP23717790A JPH04119552A JP H04119552 A JPH04119552 A JP H04119552A JP 2237177 A JP2237177 A JP 2237177A JP 23717790 A JP23717790 A JP 23717790A JP H04119552 A JPH04119552 A JP H04119552A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- circular arc
- arc shaped
- contact
- rotating shaft
- 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
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は記録用ディスクに係わり、さらに詳しくはその
ハブの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording disk, and more particularly to an improvement of its hub.
第3図に、従来例に係るフロッピーディスクカセットの
平面図を示す。FIG. 3 shows a plan view of a conventional floppy disk cassette.
図において、1はカセットシェル、2は表裏に連通ずる
窓、3は磁気シート4とハブ5で構成されるフロッピー
ディスク、6はハブ5の中心に形成された回転軸挿入孔
、7は回転軸挿入孔6から偏倚した位置に設けられた駆
動ビン挿入孔である。In the figure, 1 is a cassette shell, 2 is a window that communicates with the front and back sides, 3 is a floppy disk composed of a magnetic sheet 4 and a hub 5, 6 is a rotating shaft insertion hole formed in the center of the hub 5, and 7 is a rotating shaft. This is a drive bottle insertion hole provided at a position offset from the insertion hole 6.
第4図はハブ回転時に作用する力を示す説明図であり、
8,9は、記録再生装置側の回転軸および駆動ピン、F
lは駆動ピン9による作用力と方向、F2は回転軸8に
よる作用力と方向をそれぞれ示している。FIG. 4 is an explanatory diagram showing the force that acts when the hub rotates,
8 and 9 are the rotating shaft and drive pin on the recording/reproducing device side, F
1 indicates the force and direction exerted by the drive pin 9, and F2 indicates the force and direction exerted by the rotating shaft 8, respectively.
ところで、回転軸挿入孔6の位置決め辺6a6bが直線
状の場合、回転軸8との接触がほぼ点接触となる。荷重
が集中する結果、記録再生装置への装着の繰り返しによ
り、ハブ5と回転軸8が互いに摩耗し、記録用ディスク
の装置内での相対的な位置ずれを生じる。By the way, when the positioning side 6a6b of the rotating shaft insertion hole 6 is linear, the contact with the rotating shaft 8 is almost a point contact. As a result of the concentrated load, the hub 5 and rotating shaft 8 wear out against each other due to repeated attachment to the recording/reproducing apparatus, resulting in relative displacement of the recording disk within the apparatus.
その結果、オフトラックなど、信頼性に問題があった。As a result, there were reliability problems such as off-track.
そこで第5図に示すように、回転軸8との接触面積が増
すように、位置決め辺5a、5bに円弧状部10.11
を形成し、上述の欠点を解消する技術が既に提案されて
いる。Therefore, as shown in FIG. 5, in order to increase the contact area with the rotating shaft 8, arc-shaped portions 10.
Techniques have already been proposed to eliminate the above-mentioned drawbacks.
しかしながら、第5図に示す従来例においては、回転軸
8と各円弧状部10.11との接触点PPが円弧の中心
点にあり、回転軸中心02点PPでなる中心角θは90
度となっている。そのため、ハブ5の回転時、ディスク
回転駆動力、磁気ヘッド、リフターなどの摩擦力の如き
外乱となる力の方向が、前記中心角θの領域を外れるこ
とがある。そうなると回転軸8と円弧状部10.11の
接触が離れ(同図−点鎖線で図示)、オフトラックを生
しることがあった。However, in the conventional example shown in FIG. 5, the contact point PP between the rotating shaft 8 and each arcuate portion 10.11 is at the center point of the circular arc, and the central angle θ formed by the rotating shaft center point 02 PP is 90.
It has become a degree. Therefore, when the hub 5 rotates, the direction of the disturbance force such as the disk rotational driving force, the frictional force of the magnetic head, the lifter, etc. may deviate from the range of the central angle θ. If this happens, the rotating shaft 8 and the arcuate portion 10.11 may come out of contact (as shown by the dotted chain line in the figure), resulting in off-track.
この発明は、上記従来製品が持っていたオフトラックと
いう欠点を解消し、以てチャッキングの安定性に優れ、
互換性、信頼性の高い記録用ディスクを提供することを
目的とする。This invention eliminates the disadvantage of off-track that the conventional products had, and has excellent chucking stability.
The objective is to provide highly compatible and reliable recording discs.
〔課題を解決するための手段]
上記目的は、中心部に記録再生装置側の回転軸を挿入す
る回転軸挿入孔を設けたハブと、このハブの外周部に固
着した記録媒体とからなる記録用ディスクにおいて、回
転軸挿入孔の位置決め辺の、回転軸との接触部を円弧状
に形成すると共に、中点より外側に接触点ををする円弧
状部を少なくとも1つ設けることによって達成される。[Means for Solving the Problem] The above object is to provide a recording medium comprising a hub having a rotation shaft insertion hole in the center for inserting a rotation shaft of a recording/reproducing device, and a recording medium fixed to the outer circumference of the hub. This is achieved by forming the contact portion of the positioning side of the rotary shaft insertion hole with the rotary shaft in an arc shape in the disk for use with the rotating shaft, and providing at least one arc-shaped portion having a contact point outside the midpoint. .
回転軸中心と、位置決め辺に対する2点の接触点の中心
角で囲まれる領域を90度より拡げることにより、ハブ
に作用する諸々の力の合力の反力の方向をその領域内に
収めるようにしている。By expanding the area surrounded by the rotation axis center and the central angle of the two contact points with the positioning side by more than 90 degrees, the direction of the reaction force of the resultant force of various forces acting on the hub is kept within that area. ing.
以下、本発明の実施例を図面に基づき説明する。 Embodiments of the present invention will be described below based on the drawings.
なお、従来例と同様個所には同一符号を付して重複する
説明は省略する。Note that parts similar to those in the conventional example are given the same reference numerals and redundant explanations will be omitted.
第1図は回転軸とハブの接触点を示す説明図、第2図は
円弧状部の形成位置を示す説明図である。FIG. 1 is an explanatory diagram showing the contact point between the rotating shaft and the hub, and FIG. 2 is an explanatory diagram showing the formation position of the circular arc portion.
第1図に示すように、位置決め辺6a、6bには円弧状
部10.11が形成されているが、円弧状部10の中点
10aの外側に、接点Pが位置するように円弧状部10
は形成されている。As shown in FIG. 1, arcuate portions 10.11 are formed on the positioning sides 6a and 6b, and the arcuate portions are arranged so that the contact point P is located outside the midpoint 10a of the arcuate portion 10. 10
is formed.
即ちこの場合、第2図に示すように、円弧状部10を形
成する円の中心02と、円弧状部IIのそれ03とはず
れたものとなる。That is, in this case, as shown in FIG. 2, the center 02 of the circle forming the arcuate portion 10 is offset from the center 03 of the arcuate portion II.
再び第1図に戻って、回転軸8の中心点01から各接触
点P、Pにおろした線により形成される角度θ、言い換
えると各接触点P、Pの垂線の変わる角度θは90度よ
り大きくなる(95度〜110度位)ため、この角度θ
を以て囲まれる領域は従来例より広いものとなる。従っ
てハブ5に作用する力の反力の方向を、この領域内に収
めることができるから、ハブ5が移動し、センタリング
が行われないという欠点を解消することができる。Returning to FIG. 1 again, the angle θ formed by the line drawn from the center point 01 of the rotating shaft 8 to each contact point P, P, in other words, the angle θ at which the perpendicular to each contact point P, P changes is 90 degrees. This angle θ is larger (approximately 95 degrees to 110 degrees), so this angle θ
The area surrounded by is wider than the conventional example. Therefore, since the direction of the reaction force acting on the hub 5 can be contained within this region, it is possible to eliminate the drawback that the hub 5 moves and is not centered.
以上説明したように、本発明では、円弧状部の少なくと
も1つを、円弧中心線が、回転軸中心を通らないように
し、回転軸中心と2個所の接触点で形成される中心角を
90度以上に設定したから、回転軸とハブ内周の位置決
め辺(の円弧状部)とのずれを回避してセンタリング精
度を高めることができる。As explained above, in the present invention, the center line of at least one of the circular arc portions does not pass through the center of the rotating shaft, and the central angle formed by the two contact points with the center of the rotating shaft is 90°. Since it is set to a value greater than 1°, it is possible to avoid misalignment between the rotating shaft and the positioning side (arc-shaped portion thereof) on the inner periphery of the hub, thereby increasing centering accuracy.
第1図は回転軸とハブの接触点を示す説明図、第2図は
円弧状部の形成位置を示す説明図、第3図は従来例に係
るフロッピーディスクカセットの平面図、第4図はハブ
回転時に作用する力を示す説明図、第5図は従来例に係
る回転軸とハブの接触点を示す説明図である。
5・・・ハフ、6・・・回転軸挿入孔、6a、6b・・
・位置決め辺、8・・・回転軸、10.11・・・円弧
状部、P・・・接触点。
第
図
第
図
第
図
第
図Fig. 1 is an explanatory diagram showing the contact point between the rotating shaft and the hub, Fig. 2 is an explanatory diagram showing the formation position of the circular arc portion, Fig. 3 is a plan view of a conventional floppy disk cassette, and Fig. 4 is an explanatory diagram showing the contact point between the rotating shaft and the hub. FIG. 5 is an explanatory diagram showing the force that acts when the hub rotates, and FIG. 5 is an explanatory diagram showing the contact points between the rotating shaft and the hub according to a conventional example. 5... Hough, 6... Rotating shaft insertion hole, 6a, 6b...
・Positioning side, 8...Rotation axis, 10.11...Circular arc portion, P...Contact point. Figure Figure Figure Figure
Claims (1)
入孔を設けたハブと、このハブの外周部に固着した記録
媒体とからなる記録用ディスクにおいて、回転軸挿入孔
の位置決め辺の、回転軸との接触部を円弧状に形成する
と共に、中点より外側に接触点を有する円弧状部を少な
くとも1つ有することを特徴とする記録用ディスク。In a recording disk consisting of a hub having a rotary shaft insertion hole in the center for inserting a rotary shaft of a recording/reproducing device, and a recording medium fixed to the outer periphery of the hub, the positioning side of the rotary shaft insertion hole is A recording disk characterized in that a contact portion with a rotating shaft is formed in an arc shape, and at least one arc portion has a contact point outside the center point.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2237177A JPH04119552A (en) | 1990-09-10 | 1990-09-10 | Disk for recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2237177A JPH04119552A (en) | 1990-09-10 | 1990-09-10 | Disk for recording |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04119552A true JPH04119552A (en) | 1992-04-21 |
Family
ID=17011517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2237177A Pending JPH04119552A (en) | 1990-09-10 | 1990-09-10 | Disk for recording |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04119552A (en) |
-
1990
- 1990-09-10 JP JP2237177A patent/JPH04119552A/en active Pending
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