JPS61160871A - Revolving device of magnetic disk - Google Patents
Revolving device of magnetic diskInfo
- Publication number
- JPS61160871A JPS61160871A JP60000538A JP53885A JPS61160871A JP S61160871 A JPS61160871 A JP S61160871A JP 60000538 A JP60000538 A JP 60000538A JP 53885 A JP53885 A JP 53885A JP S61160871 A JPS61160871 A JP S61160871A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- magnet
- magnetic
- magnetic disk
- mandrel
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 36
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000000873 masking effect Effects 0.000 abstract 2
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 230000037431 insertion Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/0282—Positioning or locking of single discs of discs rotating during transducing operation by means provided on the turntable
-
- 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
- Rotational Drive Of Disk (AREA)
- 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〕
本発明は磁気ディスク回転装置に係り、特に磁気ディス
クの心金が載置されるハブと、この心金を吸引するマグ
ネットを備えた該装置のチャッキング機構に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk rotating device, and more particularly to the device, which includes a hub on which a mandrel of a magnetic disk is placed, and a magnet that attracts the mandrel. The invention relates to a chucking mechanism.
従来より、このような装置として、中央部に心金を有す
るフレキシブルディスクを心出し駆動するために、回転
軸に上記心金をハブ側に吸引するマグネットと弾性部材
に支持された駆動ピンを備えたものが、例えば特開昭５
７−３６４７３号公報等により知られている。Conventionally, in order to center and drive a flexible disk having a mandrel in the center, such a device has a rotary shaft equipped with a magnet that attracts the mandrel toward the hub and a drive pin supported by an elastic member. For example, Japanese Patent Application Publication No. 5
It is known from Publication No. 7-36473 and the like.
第３図及び第４図はその構成を示す斜視図及び断面図で
ある。各図において、■は図示しない回転源により回転
される回転軸であり、該回転軸１には第４図に示すフレ
キシブルディスク２の心金３が載置されるハブ４と、こ
のハブ４を受けるハブ受台５が嵌着されている。６は上
記ハブ受台５底板裏面側に設けられた図示しない板バネ
に取付けられ、該底板に設けられた孔を介して上記ハブ
４の上面よりも上側に突出する如く設けられた駆動ピン
、７は上記ハブ４に外嵌され、ハブ受台５に保持された
心金３吸引用のマグネットであり、駆動ピン６を挟む開
放端を有する心金より小径のループ状を成し、上下面が
着磁されている。一方、８は図示しない駆動源により矢
印方向、すなわちフレキシブルディスク２の半径方向に
移動し、上記フレキシブルディスク２の記憶面に当接し
て信号の読み書きを行うヘッドである。なお、フレキシ
ブルディスク２の心金３には中心に回転軸挿入孔と、偏
心した位置に駆動ピン挿入孔が設けられている。FIGS. 3 and 4 are a perspective view and a sectional view showing the structure. In each figure, ■ is a rotating shaft rotated by a rotation source (not shown), and the rotating shaft 1 includes a hub 4 on which a mandrel 3 of a flexible disk 2 shown in FIG. A receiving hub holder 5 is fitted. A drive pin 6 is attached to a leaf spring (not shown) provided on the back side of the bottom plate of the hub holder 5, and is provided so as to protrude above the top surface of the hub 4 through a hole provided in the bottom plate. Reference numeral 7 designates a magnet for attracting the mandrel 3 which is fitted onto the hub 4 and held by the hub holder 5. The magnet 7 has a loop shape with a smaller diameter than the mandrel and has an open end that sandwiches the drive pin 6. is magnetized. On the other hand, a head 8 is moved in the direction of the arrow, that is, in the radial direction of the flexible disk 2 by a drive source (not shown), and comes into contact with the storage surface of the flexible disk 2 to read and write signals. The mandrel 3 of the flexible disk 2 is provided with a rotating shaft insertion hole at the center and a drive pin insertion hole at an eccentric position.
次に動作について説明する。Next, the operation will be explained.
第４図に示す如くフレキシブルディスク２を装着すると
、中央の心金３は回転軸挿入孔に回転軸ｌが挿入される
ことにより概略半径方向の位置が決められるとともに、
ハブ４を介してマグネット７により吸引される。この吸
引力により、フレキシブルディスク２はハブ４によって
保持される。When the flexible disk 2 is mounted as shown in FIG. 4, the central mandrel 3 is positioned approximately in the radial direction by inserting the rotating shaft l into the rotating shaft insertion hole, and
It is attracted by the magnet 7 via the hub 4. The flexible disk 2 is held by the hub 4 due to this suction force.
そして、ハブ受台５が回転軸１とともに回転することに
より、駆動ピン６が心金３の駆動ピン挿入孔に挿入され
、最終的な位置決め及び回転駆動が行われる。この状態
でヘッド８により信号の書込み、読出しが行われる。Then, as the hub pedestal 5 rotates together with the rotating shaft 1, the drive pin 6 is inserted into the drive pin insertion hole of the mandrel 3, and final positioning and rotational driving are performed. In this state, the head 8 writes and reads signals.
しかしながら、上記従来装置にあっては、マグネット７
が、例えば上面がＮ極、下面がＳ極に着磁されていると
すると、第５図に示すようにループ状の外マグネット７
の内外両側に同量の磁束９が発生し、外側に発生する磁
束９の影響によって、ヘッド８に誤電流が生じ、データ
の読出し精度が低下するという問題点を有していた。However, in the above conventional device, the magnet 7
However, if, for example, the upper surface is magnetized to the N pole and the lower surface is magnetized to the S pole, the loop-shaped outer magnet 7 as shown in FIG.
The same amount of magnetic flux 9 is generated on both the inner and outer sides of the head 8, and the influence of the magnetic flux 9 generated on the outside causes an erroneous current to be generated in the head 8, resulting in a problem in that data reading accuracy is reduced.
本発明は係る問題点を解決するためになされた ゛もの
でヘッドに与えるマグネットの磁束の影響を少なくして
、データの読出し精度が低下することのない磁気ディス
ク回転装置を得ることを目的とするものである。The present invention has been made in order to solve these problems.It is an object of the present invention to provide a magnetic disk rotating device in which the influence of the magnetic flux of the magnet on the head is reduced and the accuracy of data reading does not deteriorate. It is something.
本発明に係る磁気ディスク回転装置は、磁気ディスクの
心金を吸引するマグネットの外周側に磁気遮蔽部材を設
けたものである。A magnetic disk rotating device according to the present invention includes a magnetic shielding member provided on the outer circumferential side of a magnet that attracts a mandrel of a magnetic disk.
本発明においては、マグネットより生じる外側への磁束
が磁気遮蔽部材により遮蔽される。In the present invention, outward magnetic flux generated by the magnet is shielded by the magnetic shielding member.
以下、本発明を第１図及び第２図に示す実施例にもとづ
き説明する。なお、第１図は本実施例の斜視図、第２図
はディスク装着時の断面図であり、第３図及び第４図に
示す従来例と同一または相当部分には同一符号を用い、
その説明は省略する。The present invention will be explained below based on the embodiments shown in FIGS. 1 and 2. Note that FIG. 1 is a perspective view of this embodiment, and FIG. 2 is a cross-sectional view when the disk is installed. The same reference numerals are used for the same or equivalent parts as in the conventional example shown in FIGS. 3 and 4.
The explanation will be omitted.
各図において、１０．１１は本実施例によるマグネット
とハブであり、上記ハブ１１は筒状に形成され、このハ
ブ１１と回転軸１との間にマグネット１０が嵌入されて
いる。そして、本実施例においては、上記ハブ１１が磁
気遮蔽部材として、強磁性体等により構成されている。In each figure, reference numeral 10.11 indicates a magnet and a hub according to this embodiment. The hub 11 is formed into a cylindrical shape, and the magnet 10 is fitted between the hub 11 and the rotating shaft 1. In this embodiment, the hub 11 is made of a ferromagnetic material or the like as a magnetic shielding member.
こめように構成することにより、マグネット１０より生
じる外側への磁束、すなわちヘッド８に悪影響を与える
磁束がハブ１工により遮蔽されるので、データの読出し
精度が低下することがなくなる。また、本実施例におい
ては、ハブ１１を磁気遮蔽部材として構成し、その内側
にマグネット１０を設けたので、部品点数を増すことな
く上記効果が得られるとともにマグネット１０をヘッド
８から距離的にも遠ざけることができるので更に効果が
上がる。Due to this structure, outward magnetic flux generated by the magnet 10, that is, magnetic flux that adversely affects the head 8, is shielded by the hub 1, so that data reading accuracy does not deteriorate. Furthermore, in this embodiment, the hub 11 is configured as a magnetic shielding member, and the magnet 10 is provided inside the hub 11, so that the above effect can be obtained without increasing the number of parts, and the magnet 10 can be distanced from the head 8. Since you can move it further away, it will be even more effective.
以上説明したように本発明によれば、磁気ディスクの心
金を吸引するマグネットの外周側に磁気遮蔽部材を設け
たことにより、ヘッドに及ぼすマグネットの影響はほと
んどなくなり、読出し精度の低下することのない磁気デ
ィスク回転装置が得られるという効果がある。As explained above, according to the present invention, by providing the magnetic shielding member on the outer circumferential side of the magnet that attracts the mandrel of the magnetic disk, the influence of the magnet on the head is almost eliminated, and the deterioration of read accuracy is prevented. This has the effect of providing a magnetic disk rotation device that does not require the use of other magnetic disks.
第１図は本発明による磁気ディスク回転装置の一実施例
を示す斜視図、第２図は上記実施例のディスク装着時を
示す断面図、第３図は従来例を示す斜視図、第４図は従
来例のディスク装着時を示す断面図、第５図は従来例に
おけるマグネットの磁束の状態を示す断面図である。
２・・・磁気ディスク、３・・・心金、１０・・・マグ
ネット、１１・・・ハブ（磁気遮蔽部材）。
なお、図中同一または相当部分には同一符号を用いてい
る。FIG. 1 is a perspective view showing an embodiment of a magnetic disk rotating device according to the present invention, FIG. 2 is a sectional view showing the above embodiment when the disk is installed, FIG. 3 is a perspective view showing a conventional example, and FIG. 5 is a cross-sectional view showing the conventional example when a disk is mounted, and FIG. 5 is a cross-sectional view showing the state of the magnetic flux of the magnet in the conventional example. 2... Magnetic disk, 3... Core metal, 10... Magnet, 11... Hub (magnetic shielding member). Note that the same reference numerals are used for the same or corresponding parts in the figures.
Claims (2)
置されるハブと、上記ハブ近傍に位置され、上記心金よ
り小径でかつ上記心金をハブ側に吸引させるマグネット
とを備えた磁気ディスク回転装置において、上記マグネ
ットの外周側に磁気遮蔽部材を設けたことを特徴とする
磁気ディスク回転装置。(1) A hub that is rotated by a rotation source and on which a mandrel of a magnetic disk is placed, and a magnet that is located near the hub, has a smaller diameter than the mandrel, and attracts the mandrel toward the hub. A magnetic disk rotating device characterized in that a magnetic shielding member is provided on the outer peripheral side of the magnet.
にマグネットを配置したことを特徴とする特許請求の範
囲第１項記載の磁気ディスク回転装置。(2) The magnetic disk rotating device according to claim 1, wherein the hub is formed from a cylindrical magnetic shielding member, and a magnet is disposed inside the hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60000538A JPS61160871A (en) | 1985-01-07 | 1985-01-07 | Revolving device of magnetic disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60000538A JPS61160871A (en) | 1985-01-07 | 1985-01-07 | Revolving device of magnetic disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61160871A true JPS61160871A (en) | 1986-07-21 |
Family
ID=11476521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60000538A Pending JPS61160871A (en) | 1985-01-07 | 1985-01-07 | Revolving device of magnetic disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61160871A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0351032A2 (en) * | 1988-07-15 | 1990-01-17 | Pioneer Electronic Corporation | Optical disk player |
| EP0357171A2 (en) * | 1988-08-31 | 1990-03-07 | Pioneer Electronic Corporation | Optical disc player and method for its manufacture |
-
1985
- 1985-01-07 JP JP60000538A patent/JPS61160871A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0351032A2 (en) * | 1988-07-15 | 1990-01-17 | Pioneer Electronic Corporation | Optical disk player |
| EP0357171A2 (en) * | 1988-08-31 | 1990-03-07 | Pioneer Electronic Corporation | Optical disc player and method for its manufacture |
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