JPS59221866A - Loading device of recording medium - Google Patents
Loading device of recording mediumInfo
- Publication number
- JPS59221866A JPS59221866A JP58093368A JP9336883A JPS59221866A JP S59221866 A JPS59221866 A JP S59221866A JP 58093368 A JP58093368 A JP 58093368A JP 9336883 A JP9336883 A JP 9336883A JP S59221866 A JPS59221866 A JP S59221866A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- elastic member
- loading device
- mounting device
- ball
- 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
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
- G11B17/0284—Positioning or locking of single discs of discs rotating during transducing operation by clampers
-
- 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
Landscapes
- Feeding And Guiding Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は円盤状記録媒体を用いた情報記憶装置の記録媒
体の装着装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a recording medium mounting device for an information storage device using a disc-shaped recording medium.
例えば、この種の情報記憶装置として光磁気ディスク装
置がある。この種の装置は記録信号の大きさがμｍオー
ダ（０，８ｔｔｍ Ｘ １．３ μｆｆ１）であり、信
号列間隔が２〜３μｍのため高密度記録が可能である。For example, a magneto-optical disk device is an example of this type of information storage device. This type of device is capable of high-density recording because the recording signal size is on the μm order (0.8 ttm x 1.3 μff1) and the signal sequence interval is 2 to 3 μm.
例えば、直径３０αの記録媒体でＡ４サイズで１６ｐｅ
ｌの密度の情報を約１万枚収納できる。For example, a recording medium with a diameter of 30α is 16pe in A4 size.
It can store approximately 10,000 sheets of information with a density of 1.
その一方、情報をμｍオーダの精度で記録媒体上に記録
しなければ信号列（トラック）が交差するなどの事故が
生じる。この記録位置ずれは再生時にトラッキング機能
によって光ビームの照射位置を変えることによって補正
できるが記録時は機械精度にたよっている。この記録位
置ずれの主な原因は、記録部の送り精度と記録媒体の装
着時にともなう偏心である。記録部の送りにはボールネ
ジや金型イ・ジ等を利用した手段によりサブミクロンオ
ーダの精度を保っている。これに比べて、再装着に伴う
偏心は大きく、１００μｍ程度である。このため、再装
着の追加記録時一般には追加記録時はつねには、少なく
とも〔１００μｍ ＋）ラックピッチ〕の間隔をあけて
記録を開始して信号列交差の事故を防止していた。この
ことは、記録情報量の低減を招くし、また再生時には、
トラッキング機能が±１００μｍ１００μｍ程制系の安
定性に問題が生じた。On the other hand, if information is not recorded on the recording medium with precision on the order of μm, accidents such as signal strings (tracks) crossing may occur. This recording position shift can be corrected by changing the irradiation position of the light beam using a tracking function during playback, but during recording it relies on mechanical precision. The main causes of this recording position shift are the feeding accuracy of the recording unit and the eccentricity caused when the recording medium is mounted. The feeding of the recording section uses means such as ball screws and mold inserts to maintain accuracy on the order of submicrons. In comparison, the eccentricity associated with reattachment is large, on the order of 100 μm. For this reason, in general, when additional recording is performed after reinstallation, recording is always started with an interval of at least [100 μm +) rack pitch] to prevent signal train crossing accidents. This leads to a reduction in the amount of recorded information, and during playback,
A problem arose in the stability of the tracking system when the tracking function was ±100 μm.
偏心をより少なくするために、記録媒体をタ−ンテーブ
ル上に載置後記録媒体中心に設けられだ円孔に円錐を挿
入して安定保持する装着手段が考案されている。この装
着手段は偏心を従来と比べ少さく（３０μｍ以内）おさ
えることができた。しかし、装着時に円ｅ［Ｉ；を円孔
にはめこむために、長期使用中には記録媒体に設けだ円
孔周辺の角部（項部）の損傷をまねき、さらにこれが原
因で偏心をとりきれないＪＳ故が生じる。特に、光磁気
ディスクの場合には基盤がガラスであることが多く、ま
た板厚みがあることが理由で上述の事故が生じた。In order to further reduce eccentricity, a mounting means has been devised in which a recording medium is placed on a turntable and then a cone is inserted into an elliptical hole provided at the center of the recording medium to stably hold the recording medium. This mounting means was able to suppress eccentricity to a smaller value (within 30 μm) than conventional methods. However, in order to fit the circle e[I; into the circular hole during installation, during long-term use, the corner (neck) around the elliptical hole provided in the recording medium may be damaged, and this also causes eccentricity to be removed. JS errors will occur. In particular, in the case of magneto-optical disks, the above-mentioned accident occurred because the substrate is often glass and the plate is thick.
また、円錐な円孔に確実にはめこむ作業が必要であり、
さらにこの種の装着手段は複雑な構成となりやすく高価
となりがちであった。Also, it requires work to fit it securely into the conical hole.
Furthermore, this type of attachment means tends to be complicated and expensive.
本発明の目的は上記の点に鑑み、上記欠点を解消するた
めになされたもので確実で安価かつ偏心の少ない円盤状
記録媒体の装着装置を提供することにある。SUMMARY OF THE INVENTION In view of the above points, an object of the present invention is to provide a mounting device for a disc-shaped recording medium that is reliable, inexpensive, and has less eccentricity.
なお、本発明は記録媒体、駆動モータｒｆＱＩ＋外周に
同心円状に弾性部（２を配置し、さらにその外周に記録
媒体半径方向に移動可能な複数個の剛性部材な配置し、
剛性部材を包含する円が記録媒体中心に設けられだ円孔
より大きくし、記録媒体円孔に弾性部材を圧縮しながら
剛体を挿入することにより位置決めを行い、上述の目的
を達成した。In addition, the present invention arranges an elastic part (2) concentrically around the outer periphery of the recording medium and the drive motor rfQI, and further arranges a plurality of rigid members movable in the radial direction of the recording medium on the outer periphery.
The above object was achieved by forming a circle surrounding the rigid member at the center of the recording medium and making it larger than the elliptical hole, and inserting the rigid body into the circular hole of the recording medium while compressing the elastic member to perform positioning.
以下、本発明の実施例を図面に従って、詳細に説明する
。第１図は本発明による装着装置の断面図で（ａ）が本
装着装置の水平断面１ｆｉ（ｂ＋が垂直断面図を示す。Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of a mounting device according to the present invention, and (a) shows a horizontal section 1fi (b+ shows a vertical sectional view) of the mounting device.
図中１が記録媒体、２が駆動モータ、３が駆動モータ軸
、４が軸３に圧入保持されたターンテーブル、５が装着
装置で、軸３外周に接着保持された弾性部側６と複数個
の球状剛性部イオ７と球状剛性部材を保持する保持体８
とからなりたっている。In the figure, 1 is a recording medium, 2 is a drive motor, 3 is a drive motor shaft, 4 is a turntable that is press-fitted into the shaft 3, 5 is a mounting device, and the elastic part side 6 is adhesively held on the outer periphery of the shaft 3. Holding body 8 that holds the spherical rigid parts 7 and the spherical rigid member
It consists of
軸３は駆動モータ２のロータと一体構成されており、駆
動モータ２に動圧軸受を用いることにより回転ブレ（ガ
タ）を０４μｍ以下におさえている。The shaft 3 is integrally constructed with the rotor of the drive motor 2, and by using a dynamic pressure bearing in the drive motor 2, rotational wobbling (backlash) is suppressed to 04 μm or less.
実施例では円筒状の保持体８の側面に３つの孔１０が設
（すられており、３つの球状剛体７はこの孔１０から弾
性部側６に押されて突出している。９は軸３のイ、ジに
螺合し、上から記録媒体１をおさえつげる固定部しであ
る。In the embodiment, three holes 10 are provided in the side surface of the cylindrical holding body 8, and the three spherical rigid bodies 7 are pushed toward the elastic part side 6 through the holes 10 and protrude. This is a fixed part that is screwed into the A and J of the A and J to hold down the recording medium 1 from above.
本実施例の場合、保持体８の底面は軸３に嵌合するよう
な孔を有する底面を有し、保持体８の上部はイ、ジが切
ってあり、このネジ部に軸３に嵌合するフタ８′が螺合
している。記録媒体１を、駆動モータ２の軸３に装着す
る際は、記録媒体１の円孔に球状剛体７を挿入するよう
にターンテーブル４上に８α録媒体１を載置する。もと
もと球状剛体７を包含する円Ａは記録媒（２１１の円孔
よりも大きくなっているから、記録媒体の円孔内側に弾
性部材６の力に抗して球状剛体７を押しつめるようにな
る。In the case of this embodiment, the bottom surface of the holder 8 has a hole that fits into the shaft 3, and the upper part of the holder 8 is cut with A and J. A matching lid 8' is screwed together. When mounting the recording medium 1 on the shaft 3 of the drive motor 2, the 8α recording medium 1 is placed on the turntable 4 so that the spherical rigid body 7 is inserted into the circular hole of the recording medium 1. Since the circle A that originally includes the spherical rigid body 7 is larger than the circular hole of the recording medium (211), the spherical rigid body 7 is pressed inside the circular hole of the recording medium against the force of the elastic member 6. .
この時に球状剛体７は半径方向に移動可能となっている
から記録媒体１の円孔と円Ａとの直径差だけ球状剛体７
が弾性部し６を圧縮する。この圧縮力により球状剛体７
で記録媒体円孔を内側より押しつげる。こうして記録媒
体１の位置決めを行なう。この後、固定部（２９を輔３
のイ・ジに螺合させてｄ己録媒体１を上から締めつけて
固定化させる。At this time, since the spherical rigid body 7 is movable in the radial direction, the spherical rigid body 7 is moved by the diameter difference between the circular hole of the recording medium 1 and the circle A.
is an elastic part and compresses 6. Due to this compressive force, the spherical rigid body 7
Press down on the recording medium hole from the inside. In this way, the recording medium 1 is positioned. After this, attach the fixing part (29 to
Screw it into the holes and tighten the self-recording medium 1 from above to fix it.
ここで、記録媒体１の位置決め精度について考えてみる
。Now, consider the positioning accuracy of the recording medium 1.
球状剛体７として軸受用鋼球を使用した。軸受用鋼球の
球径精度は±０５μｍ以下である。装着装置５に記録媒
体の円孔をはめこむ際に軸受用鋼球が弾性部材６を圧縮
変形させる。この時に、各々の鋼球によって圧縮された
時の厚みのばらつきは±１０μｍ以下である。これは弾
性部し６の素材のバラツキをおさえかつパイ・定数を大
きくすることにより達成した。具体的には、素材の板厚
ｌ、うが小さくかつバネ定数が太きい、硬度８０のウレ
タンゴムンートを長方形に切断し輔３にまきつけている
。A steel ball for a bearing was used as the spherical rigid body 7. The ball diameter accuracy of the steel balls for bearings is ±05 μm or less. When fitting the recording medium into the circular hole of the mounting device 5, the bearing steel ball compresses and deforms the elastic member 6. At this time, the variation in thickness when compressed by each steel ball is ±10 μm or less. This was achieved by suppressing variations in the material of the elastic part 6 and increasing the pi constant. Specifically, a urethane rubber mount having a hardness of 80 and having a plate thickness l, a small shell and a large spring constant is cut into a rectangular shape and wrapped around the support 3.
以上のように、軸の真円度（０５μｍ以下）を考慮して
も記録媒体を１０ｉμｍで位置決めすることが可能であ
る。実験的には１５μｍ以下の位置決め精度を確保でき
た。As described above, even if the roundness of the shaft (05 μm or less) is considered, it is possible to position the recording medium at 10 i μm. Experimentally, we were able to ensure positioning accuracy of 15 μm or less.
また、記録媒体の円孔を内側より加圧する構成のため記
録媒体を破損する事故を防止できた。Furthermore, since the circular hole of the recording medium is pressurized from the inside, accidents that damage the recording medium can be prevented.
第２図は本発明に係る記録媒体装着装置の他の実施例を
示１−０図中５は装着装置で第１図で述べた装着装置と
同等の機能と構成を有する。１１は記録媒体保持器で加
圧板１２が本体に設けられた開閉カバー１３に正大保持
された軸１４に軸受１５を介して回転自在に保持されて
いる。 １６はウレタンゴム等の弾性体で加圧板１２の
先端に接着固持される。１７はばねで、軸受１５を下方
に加圧し、その結果加圧板１２を加圧する。以上の構成
において開閉カバー１３を閉じるとげね１７の作用によ
って加圧板１２が記録媒体１をターンテーブル４上に圧
接保持する。なお記録媒体１が回転すれば軸受１５によ
って加圧板１２が回転する。このようにすれば、記録媒
体１をターンテーブル４上に載置した後開閉カバー１３
を閉じるだけで装着を終了することができる。FIG. 2 shows another embodiment of the recording medium mounting device according to the present invention. In FIGS. 1-0, reference numeral 5 denotes a mounting device which has the same function and configuration as the mounting device described in FIG. Reference numeral 11 denotes a recording medium holder, in which a pressure plate 12 is rotatably held via a bearing 15 on a shaft 14 which is held upright by an opening/closing cover 13 provided on the main body. Reference numeral 16 is an elastic body such as urethane rubber, and is adhesively fixed to the tip of the pressure plate 12. A spring 17 presses the bearing 15 downward, and as a result pressurizes the pressure plate 12. In the above configuration, the pressure plate 12 presses and holds the recording medium 1 on the turntable 4 by the action of the barb 17 that closes the opening/closing cover 13. Note that when the recording medium 1 rotates, the bearing 15 causes the pressure plate 12 to rotate. In this way, after the recording medium 1 is placed on the turntable 4, the cover 13 can be opened and closed.
You can finish wearing it by simply closing it.
以上のように本発明の装着装置は、 （１） 簡素な構成のため安価である。As described above, the mounting device of the present invention has (1) It is inexpensive due to its simple configuration.
（２）簡素な構成のため加工が容易で精度が確保できる
。(2) Due to the simple configuration, processing is easy and accuracy can be ensured.
（３）記録媒体の破損を防止できる。(3) Damage to the recording medium can be prevented.
などの特徴をもつ優れた装着装置である。This is an excellent mounting device with the following features.
第１図及び第２図は本発明に係る記録媒体装着装置の各
実施例を示す説明図である。
２・・・駆動モータ ３・・・軸４・・・タ
ーンテーブル ５・・・装着装置６・・・弾性部
材 ７・・・球状調性体８・・・保持体
特許出願人 キャノン株式会社
（ａ）
省２図FIGS. 1 and 2 are explanatory diagrams showing each embodiment of the recording medium mounting device according to the present invention. 2... Drive motor 3... Axis 4... Turntable 5... Mounting device 6... Elastic member 7... Spherical tonal body 8... Holder patent applicant Canon Co., Ltd. a) Ministry 2 map
Claims (1)
装着装置において、円盤状記録媒体を回転駆動づ−る回
転中心軸に装着装置を固設してあり、装着装置が円筒状
の装着本体としての保持体中心軸に巻かれた弾性部材と
弾性部材によって装着本体から外部に突出するごとく複
数の球状剛体が等分に配置されていることを特徴とする
記録媒体の装着装置。In a recording medium mounting device for mounting a disc-shaped recording medium having a circular hole in the center, the mounting device is fixed to a rotational center axis that rotates the disc-shaped recording medium, and the mounting device is connected to a cylindrical mounting body. A mounting device for a recording medium, characterized in that a plurality of spherical rigid bodies are arranged equally so as to protrude outside from a mounting main body by an elastic member wound around a central axis of a holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58093368A JPS59221866A (en) | 1983-05-28 | 1983-05-28 | Loading device of recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58093368A JPS59221866A (en) | 1983-05-28 | 1983-05-28 | Loading device of recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59221866A true JPS59221866A (en) | 1984-12-13 |
Family
ID=14080347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58093368A Pending JPS59221866A (en) | 1983-05-28 | 1983-05-28 | Loading device of recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59221866A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994024671A1 (en) * | 1993-04-16 | 1994-10-27 | Kabushiki Kaisha Toshiba | Electronic equipment and disc reproducing device |
| KR20020051149A (en) * | 2000-12-22 | 2002-06-28 | 윤종용 | A turntable assembly of disc player |
-
1983
- 1983-05-28 JP JP58093368A patent/JPS59221866A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994024671A1 (en) * | 1993-04-16 | 1994-10-27 | Kabushiki Kaisha Toshiba | Electronic equipment and disc reproducing device |
| US5808996A (en) * | 1993-04-16 | 1998-09-15 | Kabushiki Kaisha Toshiba | Disc reproducing apparatus with a compensating member to properly orient a disc on a disc chuck |
| KR20020051149A (en) * | 2000-12-22 | 2002-06-28 | 윤종용 | A turntable assembly of disc player |
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