JPH0222838Y2 - - Google Patents
Info
- Publication number
- JPH0222838Y2 JPH0222838Y2 JP1983007640U JP764083U JPH0222838Y2 JP H0222838 Y2 JPH0222838 Y2 JP H0222838Y2 JP 1983007640 U JP1983007640 U JP 1983007640U JP 764083 U JP764083 U JP 764083U JP H0222838 Y2 JPH0222838 Y2 JP H0222838Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- rotating shaft
- locking
- center core
- magnetic
- 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 2
- 238000001179 sorption measurement Methods 0.000 claims 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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、磁気デイスクを用いる記録再生装置
において、磁気デイスクを回転駆動する磁気デイ
スク回転装置に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetic disk rotating device for rotationally driving a magnetic disk in a recording/reproducing device using a magnetic disk.
背景技術とその問題点
磁気デイスク上に複数、例えば25本の同心円状
の記録トラツクを設け、各々のトラツクに撮像装
置からの１フイールドまたは１フレーム分の映像
信号を環状に記録し、再生に際しては、各トラツ
ク毎にいわゆる静止画像を得るようにした記録再
生装置が提案されている。BACKGROUND TECHNOLOGY AND PROBLEMS A plurality of concentric recording tracks, for example 25, are provided on a magnetic disk, and one field or one frame worth of video signal from an imaging device is recorded on each track in an annular manner. A recording/reproducing apparatus has been proposed which obtains a so-called still image for each track.
このような記録再生装置において、磁気デイス
クを、装置の回転軸に対して容易に着脱し、かつ
安定に回転駆動できるようにするために、小型の
装置にあつては磁力による吸着力を利用すること
が行われている。 In such a recording/reproducing device, in order to enable the magnetic disk to be easily attached to and removed from the rotation shaft of the device and to be driven to rotate stably, small devices use magnetic attraction. things are being done.
第１図及び第２図はその一例を示すもので、１
は記録再生装置側の回転軸を示し、図示しないが
モータ等の駆動源により回転される。２は回転台
である。この回転台２の一面上（図面では上面）
に、回転軸１を中心として環状の基準面形成部材
３が形成され、その上面が基準面４となるように
いわゆる面出しが施されると共に、この部材３の
内側に同様に環状をなす磁石５が取付けられて、
回転装着台６が形成される。 Figures 1 and 2 show an example.
indicates a rotating shaft on the recording/reproducing device side, which is rotated by a drive source such as a motor (not shown). 2 is a rotating table. On one side of this turntable 2 (top side in the drawing)
An annular reference surface forming member 3 is formed around the rotating shaft 1, and a so-called surface is formed so that the upper surface becomes the reference surface 4, and a similarly annular magnet is placed inside this member 3. 5 is installed,
A rotation mounting base 6 is formed.
また第２図において、１０は全体として上述の
装置に装着する磁気デイスク装置を示すもので、
１１は略環状をなしたセンタコアであり、これに
環状のヨーク１２が取付けられる。このヨーク１
２の一面上に磁気デイスク１３が配置され、セン
タコア１１のかしめにより、これとヨーク１２と
の間に磁気デイスク１３が挾持される。１４は弾
性部材である。 Further, in FIG. 2, numeral 10 indicates a magnetic disk device that is attached to the above-mentioned device as a whole.
Reference numeral 11 denotes a substantially annular center core, to which an annular yoke 12 is attached. This yoke 1
A magnetic disk 13 is disposed on one surface of the center core 11, and the magnetic disk 13 is held between this and the yoke 12 by caulking the center core 11. 14 is an elastic member.
センタコア１１は通常は樹脂にて形成される。
またヨーク１２は金属材料にて形成され、その下
面が基準面１５となされている。１６はジヤケツ
ト、１７はこれに形成された透孔である。またヨ
ーク１２の一部が回転軸１と同一方向となるよう
に切起されて切起し片１８が形成され、センタコ
ア１１の上面に臨まされる。さらに磁気デイスク
装置１０を回転装着台６に装着したとき切起し片
１８と対向する位置に磁束検出器１９が設けら
れ、切起し片１８からの磁束を検出して磁気デイ
スク１３の回転位置を検知するいわゆるパルス発
生器が形成される。 Center core 11 is usually made of resin.
Further, the yoke 12 is made of a metal material, and its lower surface serves as a reference surface 15. 16 is a jacket, and 17 is a through hole formed therein. Further, a part of the yoke 12 is cut and raised in the same direction as the rotating shaft 1 to form a cut and raised piece 18, which faces the upper surface of the center core 11. Further, a magnetic flux detector 19 is provided at a position facing the cut-and-raised piece 18 when the magnetic disk device 10 is mounted on the rotation mounting base 6, and detects the magnetic flux from the cut-and-raised piece 18 to detect the rotational position of the magnetic disk 13. A so-called pulse generator is formed which detects the
そして第２図に示すように、磁気デイスク装置
１０を記録再生装置の回転装着台６に装着する
と、記録再生装置側の基準面４と磁気デイスク装
置１０側の基準面１５とが互いに衝合し、記録再
生装置に対する磁気デイスク１３の位置決めがな
される。またヨーク１２が磁石５に吸着し、これ
によつて磁気デイスク１３は回転軸１と一体に回
転し、磁束検出器１４の出力を基準にして上述の
記録または再生が行われる。 As shown in FIG. 2, when the magnetic disk device 10 is mounted on the rotary mounting base 6 of the recording and reproducing device, the reference surface 4 on the recording and reproducing device side and the reference surface 15 on the magnetic disk device 10 side collide with each other. , the magnetic disk 13 is positioned with respect to the recording/reproducing device. Furthermore, the yoke 12 is attracted to the magnet 5, thereby causing the magnetic disk 13 to rotate together with the rotating shaft 1, and the above-described recording or reproduction is performed based on the output of the magnetic flux detector 14.
ところがこの装置においては経年変化等により
回転装着台６の磁石５の磁力が弱くなると、磁気
デイスク１３とジヤケツト１６との摩擦等による
負荷が比較的大きいために、磁力による吸着力だ
けでは滑べり等が生じて磁気デイスク１３が正し
く回転されなくなるおそれがある。 However, in this device, when the magnetic force of the magnet 5 of the rotary mounting base 6 weakens due to aging, etc., the load due to friction between the magnetic disk 13 and the jacket 16 is relatively large, so the attraction force due to the magnetic force alone may cause slippage, etc. This may cause the magnetic disk 13 to not rotate correctly.
考案の目的
本考案はこのような点にかんがみ、簡単な構成
で常に確実な磁気デイスクの回転が行われるよう
にするものである。Purpose of the invention In view of these points, the present invention is intended to ensure that the magnetic disk always rotates reliably with a simple configuration.
考案の概要
本考案は、金属板からなるヨークと回転軸が挿
通されて装着位置を適当に規制するセンタコアと
を有する磁気デイスク、及び、上記回転軸と上記
ヨークを吸着する磁石とを有する回転装着台とか
らなる磁気デイスク回転装置において、上記回転
装着台には上記回転軸の周囲に等角度間隔に複数
の第１の係止片が設けられ、上記磁気デイスクに
は上記センタコアの上記第１の係止片に係合され
る位置に１つ以上の第２の係止片が設けられたこ
とを特徴とする磁気デイスク回転装置であつて、
これによれば簡単な構成で常に確実な磁気デイス
クの回転を行うことができる。Summary of the invention The present invention comprises a magnetic disk having a yoke made of a metal plate and a center core through which a rotating shaft is inserted to appropriately regulate the mounting position, and a rotating mounting having a magnet that attracts the rotating shaft and the yoke. In the magnetic disk rotation device comprising a stand, the rotation mounting stand is provided with a plurality of first locking pieces at equal angular intervals around the rotation axis, and the magnetic disk is provided with a plurality of first locking pieces of the center core. A magnetic disk rotating device characterized in that one or more second locking pieces are provided at a position to be engaged with the locking piece,
According to this, the magnetic disk can always be rotated reliably with a simple configuration.
実施例
第３図において、回転装着台６は、中央に回転
軸１の挿通される透孔の設けられた平面部２１と
この平面部２１の周縁部に所定の高さを持ち環状
で略等角度間隔に少くとも３箇所の切欠の設けら
れた段部２２とを有して全体が磁石で形成された
第１の部材２３、及び、部材２３の外周に沿う平
面部２４とこの平面部２４の内側に上述の部材２
３の所定の高さより高くその頂部が基準面になる
ように面出しがされると共に部材２３の切欠に対
応する位置に設けられた突起２５とを有して全体
が非磁性体で形成された第２の部材２６からな
り、この部材２３，２６が、切欠に突起２５がそ
れぞれ挿入されるように嵌合され、この嵌合され
た部材２３，２６が回転台２の一面上に接着等に
より取付けられている。Embodiment In FIG. 3, the rotation mounting table 6 has a flat part 21 provided with a through hole in the center through which the rotating shaft 1 is inserted, and a ring-shaped approximately equal height having a predetermined height on the periphery of this flat part 21. A first member 23 formed entirely of a magnet and having a stepped portion 22 provided with at least three notches at angular intervals; a flat portion 24 along the outer periphery of the member 23; The above-mentioned member 2 is inside the
3, the surface is raised so that the top thereof becomes a reference surface, and the projection 25 is provided at a position corresponding to the notch of the member 23, and the entire member is made of a non-magnetic material. The members 23 and 26 are fitted so that the protrusions 25 are inserted into the notches, respectively, and the fitted members 23 and 26 are placed on one surface of the rotary table 2 by adhesive or the like. installed.
この回転装着台６の回転軸１と段部２２及び突
起２５の成す円周との間の平面部２１に、第１の
係止片２７が設けられる。この第１の係止片２７
は例えば第４図に示されるように、合成ゴム等に
よる環状の部材３１の上に形成され、回転方向に
向う側の面３２が部材３１から垂直とされると共
に、反対側の面は適当な傾斜面とされる。この係
止片２７が円周に沿つて略等角度間隔に例えば12
箇所設けられ、この部材３１が平面部２１に嵌着
される。 A first locking piece 27 is provided on the plane portion 21 of the rotary mounting base 6 between the rotating shaft 1 and the circumference formed by the stepped portion 22 and the protrusion 25 . This first locking piece 27
For example, as shown in FIG. 4, it is formed on an annular member 31 made of synthetic rubber or the like, and the surface 32 on the side facing the direction of rotation is perpendicular to the member 31, and the surface on the opposite side is sloped appropriately. It is considered to be a face. This locking piece 27 is arranged at approximately equal angular intervals along the circumference, for example, 12
This member 31 is fitted into the flat part 21.
またセンタコア１１の、回転装着台６に装着さ
れたとき第１の係止片２７に係合される位置に第
２の係止片２８が設けられる。この第２の係止片
２８は例えば第５図に示されるように、センタコ
ア１１の下面に形成され、回転方向に向う面が適
当な傾斜面にされると共に、反対側の面３３がセ
ンタコア１１から垂直とされる。この係止片２８
が例えば２箇所設けられる。 Further, a second locking piece 28 is provided on the center core 11 at a position where it is engaged with the first locking piece 27 when the center core 11 is mounted on the rotation mounting base 6 . This second locking piece 28 is formed on the lower surface of the center core 11, as shown in FIG. It is considered perpendicular to . This locking piece 28
For example, two locations are provided.
従つてこの装置において、回転装着台６に磁気
デイスク装置１０が装着されると、突起２５の頂
部の基準面と磁気デイスク装置１０のヨーク１２
の下面の基準面１５とが互いに衝合し、磁気デイ
スク１３の位置決めがなされる。またヨーク１２
が磁石によつて形成された部材２３の段部２２の
上面に吸着し、これによつて磁気デイスク１３は
回転軸１と一体に回転し、上述の記録または再生
が行われる。 Therefore, in this device, when the magnetic disk device 10 is mounted on the rotary mounting table 6, the reference plane at the top of the protrusion 25 and the yoke 12 of the magnetic disk device 10 are aligned.
The reference surfaces 15 on the lower surfaces of the two abut against each other, and the magnetic disk 13 is positioned. Also yoke 12
is attracted to the upper surface of the stepped portion 22 of the member 23 formed by a magnet, whereby the magnetic disk 13 rotates together with the rotating shaft 1, and the above-mentioned recording or reproduction is performed.
そしてこの装置において、部材２３を形成する
磁石の吸着力が弱くなつた場合にも、磁気デイス
ク装置１０が装着されて回転軸１が回転される
と、第６図に示すように第１の係止片２７と第２
の係止片２８とが係合し、回転軸１の回転が確実
に磁気デイスク１３に伝えられる。 In this device, even if the attraction force of the magnet forming the member 23 becomes weak, when the magnetic disk device 10 is attached and the rotating shaft 1 is rotated, the first engagement is performed as shown in FIG. The stopper piece 27 and the second
The locking pieces 28 are engaged with each other, and the rotation of the rotary shaft 1 is reliably transmitted to the magnetic disk 13.
なお第２の係止片２８は、第１の係止片２７の
数を等角度間隔にｓ箇所、第２の係止片２８の数
をｔ箇所とした場合に、
360゜／ｓ・ｔ（mt＋ｎ）
但し、ｍは１〜ｓ−１の任意の整数
ｎは１〜ｔ−１の各整数
の角度間隔に配置する。すなわち例えば図示のよ
うにｓ＝12，ｔ＝２の場合には、
15゜×（2m＋１）
となり、0゜と195゜（ｍ＝６）の位置に配置される。
これにより係合までの滑べりの距離を常に最小に
することができる。 Note that the second locking pieces 28 have a rotation angle of 360°/s·t, assuming that the number of the first locking pieces 27 is s at equal angular intervals, and the number of second locking pieces 28 is t. (mt+n) where m is any integer from 1 to s-1, and n is arranged at angular intervals of each integer from 1 to t-1. That is, for example, in the case of s=12 and t=2 as shown in the figure, the angle becomes 15°×(2m+1), and they are arranged at the positions of 0° and 195° (m=6).
This allows the distance of slippage before engagement to be always minimized.
また上述のように、両係合片２７，２８の面３
２，３３は回転方向に対して90゜以下とし、他面
は任意の傾斜面とする。これにより係合が確実に
行われ、また両係止片２７，２８が乗り合つた場
合にも滑降して常に良好な係合が行われる。 Further, as described above, the surfaces 3 of both the engaging pieces 27 and 28
2 and 33 shall be at an angle of 90° or less with respect to the rotation direction, and the other surface shall be any inclined surface. This ensures reliable engagement, and even when both the locking pieces 27 and 28 ride on each other, they slide down to ensure good engagement at all times.
さらに第５図において、回転軸の挿通される透
孔には位置決めの基準となる辺ａ，ｂと、弾性辺
ｃとが設けられる。そして回転軸１が挿入される
と、弾性辺ｃによつて回転軸１が相対的に図面の
上側へ行くように押圧され、上側の辺ａ，ｂに均
等に押当てられて磁気デイスク１３のいわゆるセ
ンタリングが行われる。 Furthermore, in FIG. 5, the through hole through which the rotating shaft is inserted is provided with sides a and b, which serve as a reference for positioning, and an elastic side c. When the rotating shaft 1 is inserted, the rotating shaft 1 is pushed by the elastic side c so that it moves relatively to the upper side of the drawing, and is evenly pressed against the upper sides a and b, so that the magnetic disk 13 So-called centering is performed.
ところでこのセンタリングにおいて、弾性辺ｃ
による押圧力をＦとすると、例えば回転軸１が左
側にずれていた場合にこれが辺ａに押当られ右側
に動くように作用する分力は、辺ａ，ｂのなす角
をθとして
Ｆ cosθ／２
である。従つてθ＝90゜としたときの分力は１／√２
Ｆとなり、磁石５の吸着力や摩擦力の大きさによ
つては回転軸１が動かされず、センタリングが行
えないおそれがある。そこで角度θを鋭角にし図
示のように例えばθ＝60゜とすることにより、分
圧を√３／２Ｆとしてより大きな力を得ることがで
きる。これによりセンタリングのずれによる誤動
作等の事故を減少させることができる。 By the way, in this centering, the elastic side c
For example, if the rotating shaft 1 is shifted to the left, the component force that acts to push it against side a and move it to the right is F cosθ, where the angle formed by sides a and b is θ. /2. Therefore, when θ=90°, the component force is 1/√2 F, and depending on the attraction force of the magnet 5 or the magnitude of the frictional force, the rotating shaft 1 may not be moved and centering may not be possible. Therefore, by setting the angle θ to an acute angle, for example, θ=60° as shown in the figure, it is possible to obtain a larger force by setting the partial pressure to √3/2F. This can reduce accidents such as malfunctions due to misalignment.
なお上述の例では回転装着台６側の係止辺２７
は別体に形成したが、これは例えば部材２３を形
成する磁石としてプラスチツクマグネツトを用い
ている場合には、部材２３と一体に形成すること
も可能である。 In the above example, the locking edge 27 on the rotation mounting base 6 side
is formed separately, but it can also be formed integrally with the member 23, for example, if a plastic magnet is used as the magnet forming the member 23.
考案の効果
本考案によれば、簡単な構成で常に確実な磁気
デイスクの回転を行うことができるようになつ
た。Effects of the invention According to the invention, it has become possible to constantly and reliably rotate the magnetic disk with a simple configuration.
第１図、第２図は従来の装置の説明のための
図、第３図は本考案の一例の説明のための図、第
４図、第５図はそれぞれ具体的な構成を示す平面
図及び断面図、第６図はその要部の拡大図であ
る。
６は回転装着台、１０は磁気デイスク装置、１
１はセンタコア、２７は第１の係止片、２８は第
２の係止片である。
Figures 1 and 2 are diagrams for explaining a conventional device, Figure 3 is a diagram for explaining an example of the present invention, and Figures 4 and 5 are plan views showing specific configurations, respectively. and a sectional view, and FIG. 6 is an enlarged view of the main part thereof. 6 is a rotating mounting table, 10 is a magnetic disk device, 1
1 is a center core, 27 is a first locking piece, and 28 is a second locking piece.
Claims (1)
着位置を適当に規制するセンタコアとを有する磁
気デイスク、及び、上記回転軸と上記ヨークを吸
着する磁石とを有する磁気吸着式回転装着台とか
らなる磁気デイスク回転装置において、上記磁気
吸着式回転装着台には上記回転軸の周囲に等角度
間隔に複数の第１の係止片が設けられ、上記磁気
デイスクには上記センタコアの上記第１の係止片
に係合される位置に１つ以上の第２の係止片が設
けられると共に、上記第１の係止片と第２の係止
片との係止対向面をそれぞれ略垂直の角度とし、
反対向面を所定の傾斜角度に選定したことを特徴
とする磁気デイスク回転装置。 It consists of a magnetic disk having a yoke made of a metal plate and a center core through which a rotating shaft is inserted to appropriately regulate the mounting position, and a magnetic attraction type rotating mounting base having a magnet that attracts the rotating shaft and the yoke. In the magnetic disk rotating device, the magnetic adsorption rotary mounting base is provided with a plurality of first locking pieces at equal angular intervals around the rotating shaft, and the magnetic disk is provided with a plurality of first locking pieces of the center core. One or more second locking pieces are provided at positions to be engaged with the stopper pieces, and the locking opposing surfaces of the first locking piece and the second locking piece are each set at a substantially perpendicular angle. year,
A magnetic disk rotation device characterized in that opposite surfaces are selected to have a predetermined inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP764083U JPS59118192U (en) | 1983-01-21 | 1983-01-21 | magnetic disk rotation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP764083U JPS59118192U (en) | 1983-01-21 | 1983-01-21 | magnetic disk rotation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59118192U JPS59118192U (en) | 1984-08-09 |
| JPH0222838Y2 true JPH0222838Y2 (en) | 1990-06-20 |
Family
ID=30139168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP764083U Granted JPS59118192U (en) | 1983-01-21 | 1983-01-21 | magnetic disk rotation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59118192U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550875U (en) * | 1978-09-29 | 1980-04-03 | ||
| JPS5536459B2 (en) * | 1974-04-25 | 1980-09-20 | ||
| JPS5536460B2 (en) * | 1972-06-08 | 1980-09-20 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5536460U (en) * | 1978-08-30 | 1980-03-08 | ||
| JPS5536459U (en) * | 1978-08-30 | 1980-03-08 |
-
1983
- 1983-01-21 JP JP764083U patent/JPS59118192U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5536460B2 (en) * | 1972-06-08 | 1980-09-20 | ||
| JPS5536459B2 (en) * | 1974-04-25 | 1980-09-20 | ||
| JPS5550875U (en) * | 1978-09-29 | 1980-04-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59118192U (en) | 1984-08-09 |
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