JPS6267767A - Recording disk reproducing device - Google Patents

Recording disk reproducing device

Info

Publication number
JPS6267767A
JPS6267767A JP20626485A JP20626485A JPS6267767A JP S6267767 A JPS6267767 A JP S6267767A JP 20626485 A JP20626485 A JP 20626485A JP 20626485 A JP20626485 A JP 20626485A JP S6267767 A JPS6267767 A JP S6267767A
Authority
JP
Japan
Prior art keywords
turntable
disk
oscillation
reproducing
disc
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
Application number
JP20626485A
Other languages
Japanese (ja)
Inventor
Shingo Okamoto
伸吾 岡本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP20626485A priority Critical patent/JPS6267767A/en
Publication of JPS6267767A publication Critical patent/JPS6267767A/en
Pending legal-status Critical Current

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  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

PURPOSE:To prevent the occurrence of the accident such as stylus jumping and to execute the suitable reading and reproducing by forming the turntable smaller than the diameter of the recording disk. CONSTITUTION:When a motor 2 is driven, the driving force is transferred through a driving shaft 2a to a turntable 3, the turntable 3 is rotated, and therefore, a disk 4 supported on the upper part is read and reproduced by a reproducing stylus 5a while the disk is rotated. When during the reading and reproducing, oscillation is transferred to a picking-up cartridge 5, etc. equipped with the reproducing stylus 5a from the exciting source such as a speaker, and in case the peak value of the number of the oscillation and the peak value of the number of the inherent oscillation of the turn table 3 are coincident, resonance is executed and the oscillation level comes to be larger. The outer diameter of the turntable 3 is formed to the diameter smaller than the disk 4 mounted on the upper part. Thus, the oscillation level transferred to the disk 4 comes to be smaller, the surface oscillation of the disk 4 comes to be smaller and the occurrence of the stylus jumping, etc., of the reproducing stylus 5a is prevented.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、ビデオ・ディスク・プレーヤ等記録円盤をタ
ーンテーブル上に載置し回転させつつ再生する記録円盤
再生装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a recording disc playback device such as a video disc player that plays back a recording disc by placing it on a turntable and rotating it.

〔発明の技術的背景及びその問題点〕[Technical background of the invention and its problems]

従来、この種の記録円盤再生装置は、例えば、第6図に
示すものがある。
Conventionally, there is a recording disk reproducing apparatus of this type, as shown in FIG. 6, for example.

すなわち、第7図は従来からの一般的な記録円盤再生装
置であるビデオ・ディスク・プレーヤ(VHD方式プレ
ーヤ)1の要部を示すものであり、モータ2に連結して
回転駆動可能に設けられたターンテーブル3上にディス
ク(記録円盤)4が載置され、このディスク4上を再生
針5aがトレースして、ディスク4の記録を読取再生す
るようになっている。そして、従来、ターンテーブル3
は内側と外周縁とにそれぞれ内側支持突起6外側支持突
起7とが形成され、この支持突起6.7上にこれと対応
してディスク4に形成された内周縁部と外周縁部の内側
載置突起8、外側載置突起9を位置させて載置するよう
にしている。
That is, FIG. 7 shows the main parts of a video disc player (VHD system player) 1, which is a conventional general recording disc playback device, and is connected to a motor 2 so as to be rotatably driven. A disc (recording disc) 4 is placed on a turntable 3, and a reproducing needle 5a traces the disc 4 to read and reproduce the recording on the disc 4. And conventionally, turntable 3
Inner support protrusions 6 and outer support protrusions 7 are formed on the inner and outer peripheral edges, respectively, and inner support protrusions 6.7 are formed on the inner and outer peripheral edges of the disc 4 correspondingly on the support protrusions 6.7. The placement protrusion 8 and the outer placement protrusion 9 are positioned and placed.

ところで、従来、ターンテーブル3はディスク4と略同
径に形成されており、ターンテーブル3上に載置された
ディスク4の振動特性と、再生計5aを備えたビック・
アップ・カートリッジの振動特性とは、それぞれ第8図
及び第4図に示すようになっている。この図によると、
ピンク・アンプ・カートリッジのイナータンス伝達関数
のピーク値はターンテーブル3上に載置したディスク4
のイナータンス伝達関数のピーク値と1000 CHz
)で一致して共振することがわかる。ところが、ターン
テーブル3の外径が大きいと、共振点でそれだけターン
テーブル3の振動レベルも大きくなるため、その上部に
支持されるディスク4の面振れが大きくなり、再生針5
aの針飛び等が発生し、ディスク4に記録された情報を
的確に読取再生することができないという問題点があっ
た。
By the way, conventionally, the turntable 3 has been formed to have approximately the same diameter as the disc 4, and the vibration characteristics of the disc 4 placed on the turntable 3 and a big disc equipped with a playback meter 5a have been used.
The vibration characteristics of the up cartridge are shown in FIGS. 8 and 4, respectively. According to this diagram,
The peak value of the inertance transfer function of the pink amplifier cartridge is the disk 4 placed on the turntable 3.
The peak value of the inertance transfer function of 1000 Hz
), it can be seen that they resonate in agreement. However, if the outer diameter of the turntable 3 is large, the vibration level of the turntable 3 at the resonance point will also increase accordingly, and the surface runout of the disk 4 supported on the top of the turntable 3 will increase, causing the playback needle 5
There is a problem in that needle skipping and the like occur, and the information recorded on the disc 4 cannot be read and reproduced accurately.

(発明の目的〕 この発明は如上のような実情に鑑み、その問題点を一掃
すべく創案されたものであって、針飛び等の事故の発生
を防止して、的確な読取再生が可能な記録円盤再生装置
の提供を目的とする。
(Purpose of the invention) This invention was devised in view of the above-mentioned actual situation and to eliminate the problems.It prevents accidents such as needle skipping and enables accurate reading and reproduction. The purpose is to provide a recording disc playback device.

〔発明の概要〕[Summary of the invention]

この発明は、モータに連結されたターンテーブル上に記
録円盤を載置し回転させつつ再生する記録円盤再生装置
において、上記ターンテーブルを記録円盤の径より小に
形成して構成した。
The present invention is a recording disk reproducing apparatus that plays back a recording disk by placing the recording disk on a turntable connected to a motor and rotating the turntable, in which the turntable is formed to have a diameter smaller than the diameter of the recording disk.

〔発明の効果〕〔Effect of the invention〕

この本発明によれば、ディスクを載置するターンテーブ
ルはディスクの径より小径に形成されており、ターンテ
ーブルの振動レベルは小さいので、スピーカー等に起因
する外部からの周波数とターンテーブルとの固有振動数
が一致して共振した場合でも、ディスクに伝わる振動レ
ベルが小さくなり、振動に起因するディスクの面振れ等
が小さく針飛び等の事故が防止でき、的確な読取再生を
行うことができる。
According to the present invention, the turntable on which the disc is placed has a diameter smaller than that of the disc, and the vibration level of the turntable is small. Even when the vibration frequencies match and resonate, the level of vibration transmitted to the disk is reduced, surface runout of the disk due to vibration is small, accidents such as needle skipping can be prevented, and accurate reading and reproduction can be performed.

(実施例〕 この発明の構成を第1図乃至第5図に示す一実施例に基
づいて説明する。なお、第7図に示す従来例の構成に対
応する構成には同一の符号を付して説明する。
(Embodiment) The structure of the present invention will be explained based on an embodiment shown in FIGS. 1 to 5.The same reference numerals are given to the structures corresponding to the structure of the conventional example shown in FIG. I will explain.

モータ2に連結して回転駆動可能に設けられたターンテ
ーブル3上にディスク(記録円盤)4が載置されている
が、ターンテーブル3の外径はディスク4の外径より小
に形成されている。
A disk (recording disk) 4 is placed on a turntable 3 which is connected to a motor 2 and is rotatably driven, but the outer diameter of the turntable 3 is smaller than the outer diameter of the disk 4. There is.

ターンテーブル3は内側と外周縁とに位置してそれぞれ
内側支持突起6及び外側支持突起7とが形成されており
、外側支持突起7の上部は商品名「ソンタラ」等の名称
で市販されているフェルトクロス等の軟性部材10で覆
われている。
The turntable 3 has an inner support protrusion 6 and an outer support protrusion 7 formed on the inner side and the outer peripheral edge, respectively, and the upper part of the outer support protrusion 7 is commercially available under the trade name "Sontara" or the like. It is covered with a soft member 10 such as felt cloth.

また、ディスク4は通常のものであって、内側と外周縁
に位置してそれぞれ内側載置突起8及び外側係止突起9
とが形成されている。内側載置突起8はターンテーブル
3の内側支持突起6上に位置するが、外側載置突起9は
ターンテーブル3の外側支持突起7上に位置していない
。すなわち、ターンテーブル3の外径がディスク4の外
径より小に形成されているため、外側支持突起7により
ディスク4の記録面4Aが支持されるようになっている
Further, the disk 4 is a normal one, and has an inner placement protrusion 8 and an outer locking protrusion 9 located on the inner side and the outer periphery, respectively.
is formed. The inner mounting projection 8 is located on the inner support projection 6 of the turntable 3, but the outer mounting projection 9 is not located on the outer support projection 7 of the turntable 3. That is, since the outer diameter of the turntable 3 is formed to be smaller than the outer diameter of the disk 4, the recording surface 4A of the disk 4 is supported by the outer support protrusion 7.

5はディスク4の記録面4Aをトレースして読取再生す
る再生鮭5aを備えたピック・アンプ・カートリッジで
あって、再生計5aのホルダ5b、ホルダ5bを支持す
るピック・アップ・アーム5C、ピンク・アンプ・アー
ム5cを回動自在に支持してケース側に取付けられた弾
性支持軸5dとから構成されている。
Reference numeral 5 denotes a pick amplifier cartridge equipped with a reproduction salmon 5a that traces and reads and reproduces the recording surface 4A of the disc 4, which includes a holder 5b of the reproduction total 5a, a pickup arm 5C supporting the holder 5b, and a pink - Consists of an elastic support shaft 5d rotatably supporting the amplifier arm 5c and attached to the case side.

なお、11はディスク4をターンテーブル3に固定する
抑え部材、2aはモータ2の駆動軸、12はモータ2と
ターンテーブル3間に介在してモータ2の振動を緩衝す
る緩衝部材である。
Note that 11 is a restraining member that fixes the disk 4 to the turntable 3, 2a is a drive shaft of the motor 2, and 12 is a buffering member that is interposed between the motor 2 and the turntable 3 and buffers vibrations of the motor 2.

次に、上記のように構成された本発明の一実施例の作用
を説明する。
Next, the operation of one embodiment of the present invention configured as described above will be explained.

モータ2を駆動させれば、その駆動力は駆動軸2aを介
してターンテーブル3に伝わり、ターンテーブル3は回
転することとなるので、その上部に支持されたディスク
4は回転しつつ再生計53により読取再生されることと
なる。読取再生中に、スピーカー等の加振源から再生計
5aを備えたピック・アップ・カートリッジ5等に振動
が伝わり、その振動数のピーク値とターンテーブル3の
固有振動数のピーク値とが一致する場合があると、共振
して振動レベルは大きくなるが、本発明ではターンテー
ブル3の外径はその上部に載置するディスク4より小径
に形成されており、振動レベルは小さいので、ディスク
4に伝わる振動レベルが小さくなり、ディスク4の面振
れが小さく再生計5aの針飛び等の発生が防止される。
When the motor 2 is driven, the driving force is transmitted to the turntable 3 via the drive shaft 2a, and the turntable 3 rotates, so that the disk 4 supported on the upper part rotates and the playback meter 53 is rotated. The data will be read and reproduced. During reading and playback, vibrations are transmitted from an excitation source such as a speaker to a pickup cartridge 5 equipped with a regenerator 5a, and the peak value of the vibration frequency matches the peak value of the natural frequency of the turntable 3. However, in the present invention, the outer diameter of the turntable 3 is formed to be smaller than the disk 4 placed on top of the turntable 3, and the vibration level is small. The level of vibration transmitted to the disc 4 is reduced, the surface runout of the disk 4 is reduced, and occurrence of needle skipping, etc. of the reproducing meter 5a is prevented.

例えば、ターンテーブル3上に載置したディスク4の固
有振動数は第3図に示すような振動特性となり、第4図
に示すピンク・アップ・カートリッジ5の固有振動数の
最大イナータンス伝達関数である1000()Iz)で
は極めて小であるので、板金両者の共振点が一致した場
合でも再生計5aの針飛び等の事故の発生が防止でき、
ノイズ、歪み等のない的確な読取再生を行うことができ
る。
For example, the natural frequency of the disk 4 placed on the turntable 3 has vibration characteristics as shown in FIG. 3, and the maximum inertance transfer function of the natural frequency of the pink up cartridge 5 shown in FIG. 1000()Iz), it is extremely small, so even if the resonance points of both sheet metals coincide, accidents such as needle skipping of the regenerator 5a can be prevented.
Accurate reading and reproduction without noise, distortion, etc. can be performed.

また、ディスク4は読取再生中にター・ンテーブル3を
通じて、ターンテーブル3を駆動するモータ2からの熱
が伝わることとなるが、本発明ではターンテーブル3の
径をディスク4より小に形成してあり、しかも、外側支
持部7はフェルトクロス等の軟質部材10で覆われてお
り、熱伝導効率は小であり、ディスク4の外周縁部には
熱が伝わりにくいので、特に変形の生じ易い外周縁部に
おける反り、歪み、撓み等の変形を防止することができ
、このため、再生針5aの針飛び等の事故の発生が防止
でき、ノイズ、歪み等のない的確な読取再生を行うこと
ができる。
Furthermore, heat from the motor 2 that drives the turntable 3 is transmitted to the disc 4 through the turntable 3 during reading and playback, but in the present invention, the diameter of the turntable 3 is formed to be smaller than that of the disc 4. Furthermore, since the outer support portion 7 is covered with a soft member 10 such as felt cloth, the heat conduction efficiency is low and heat is difficult to be transmitted to the outer peripheral edge of the disk 4, so deformation is particularly likely to occur. It is possible to prevent deformations such as warping, distortion, and bending at the outer peripheral edge, thereby preventing accidents such as needle skipping of the regenerating needle 5a, and performing accurate reading and reproducing without noise, distortion, etc. I can do it.

なお、ディスク4の記録面4Aはターンテーブル3の外
側支持突起7に支持されているが、この外側係止突起7
にはフェルトクロス等の軟性部材10が設けられている
ので、外側係止突起7に起因して記録面4Aに傷が発生
したり、埃の付着したりすること等が防止できる。
Note that the recording surface 4A of the disc 4 is supported by the outer support protrusion 7 of the turntable 3, and this outer locking protrusion 7
Since the flexible member 10 such as felt cloth is provided on the recording surface 4A, it is possible to prevent the recording surface 4A from being scratched or having dust attached thereto due to the outer locking protrusion 7.

なお、第5図は本発明のターンテーブルと従来例ものと
にディスク4を載置してディスク4の撓み(計算値)を
グラフにして示す比較図である。
FIG. 5 is a comparison diagram showing the deflection (calculated value) of the disk 4 when the disk 4 is placed on the turntable of the present invention and the conventional turntable.

横軸(Rsi本)は内周側支持位置を固定し、外周側支
持位置(Rsi)を変化させてこの外周側支持値W(R
si)とディスク外半径(Ri)との比を取ったもの、
縦軸(WMAX*)は外周側支持位置(Rsi)の各点
でのディスク4全体の撓みの最大値(W問)と全外周側
支持位置(Rsi)を通した撓みの最大値(WMAX 
)との比を取ったものである。これによると、従来例の
ものと本発明のものとはディスクに対する外周側支持位
置(Rsi本)は後者のものが前者のものに比し小であ
るが、両者の撓み量は略同−であり、これにより、本発
明のように外周側支持位置が小であっても読取再生に何
ら支障のないことが判る。
The horizontal axis (Rsi) fixes the inner support position, changes the outer support position (Rsi), and calculates this outer support value W (Rsi).
si) and the disk outer radius (Ri),
The vertical axis (WMAX*) represents the maximum value (W) of the entire deflection of the disk 4 at each point of the outer support position (Rsi) and the maximum value of deflection (WMAX
). According to this, although the outer circumferential side support position (Rsi position) with respect to the disk of the conventional example and that of the present invention is smaller in the latter than in the former, the amount of deflection of both is approximately the same. Therefore, it can be seen that even if the supporting position on the outer peripheral side is small as in the present invention, there is no problem in reading and reproducing.

また、参考例として、第6図に示すように、抑え部材1
1にゴムなどの弾性体キャップ13を被して、ディスク
4を保持したり、ディスク4とターンテーブル3とを同
径とし、ディスク4の内外側載置突起8.9とターンテ
ーブル3の内外側支持突起6.7との間に、それぞれフ
ェルトクロスのような弾性体14.15を設けたりして
も、ある程度振動を防止できるが、本発明のたわみによ
る針飛びなどの事故を防止できる効果は得られない。
In addition, as a reference example, as shown in FIG.
1 is covered with an elastic cap 13 made of rubber or the like to hold the disc 4, or the disc 4 and the turntable 3 are made of the same diameter, and the inner and outer mounting protrusions 8.9 of the disc 4 and the inner part of the turntable 3 are Although vibration can be prevented to some extent by providing elastic bodies 14 and 15 such as felt cloth between the outer support projections 6 and 7, the effect of the present invention in preventing accidents such as needle skipping due to deflection is cannot be obtained.

なお、上記実施例では、ビデオ・ディスク・プレーヤの
ケース、ターンテーブルの昇降機構等の周辺機器の構成
及び作用は既に周知であり、本発明の要旨と直接的な関
連のないものであり、しかも特開昭59−98359号
公報、特開昭59−157880号公報等に示されたも
のと略同様であるので、その説明は省略した。
In the above embodiment, the configuration and operation of peripheral devices such as the case of the video disc player and the lift mechanism of the turntable are already well known and are not directly related to the gist of the present invention. Since it is substantially the same as that shown in JP-A-59-98359, JP-A-59-157880, etc., the explanation thereof will be omitted.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る記録円盤再生装置の一実施例の縦
断面図、第2図はピック・アンプ・カートリフジの全体
斜視図、第3図は本発明の記録円盤再生装置に装着した
ディスクを加振してグラフで示す振動特性図、第4図は
ピック・アップ・カートリッジのグラフで示す撮動特性
図、第5図は本発明と従来例とにそれぞれ装着した場合
にディスクに発生する撓みをグラフで示す比較図、第6
図は本発明と比較する参考例を示す要部の断面図、第7
図はは従来例の縦断面図、第8図は従来例に装着したデ
ィスクのグラフで示す振動特性図である。 1・・ビデオ・ディスク・プレーヤ (記録円盤再生装置) 2・・モータ 3・・ターンテーブル 4・・デノスク(記録円盤) 款勧IIL(Hz) 第3図 200 400 600 800 40001200、
1400 ’1600款動牧(H2) 第4図 第6図 第7図
FIG. 1 is a longitudinal sectional view of an embodiment of the recording disk reproducing apparatus according to the present invention, FIG. 2 is an overall perspective view of a pick amplifier cartridge, and FIG. 3 is a disk mounted in the recording disk reproducing apparatus of the present invention. FIG. 4 is a graph showing the vibration characteristics of a pickup cartridge, and FIG. 5 is a graph showing the vibration characteristics of a pickup cartridge. FIG. Comparison chart showing deflection graphically, No. 6
The figure is a cross-sectional view of main parts showing a reference example for comparison with the present invention.
The figure is a vertical cross-sectional view of the conventional example, and FIG. 8 is a graph showing vibration characteristics of a disk mounted on the conventional example. 1...Video disc player (recording disc playback device) 2...Motor 3...Turntable 4...Denosk (recording disc) Recommendation IIL (Hz) Figure 3 200 400 600 800 40001200,
1400 '1600 movement (H2) Figure 4 Figure 6 Figure 7

Claims (1)

【特許請求の範囲】[Claims]  モータに連結されたターンテーブル上に記録円盤を載
置し回転させつつ再生する記録円盤再生装置において、
上記ターンテーブルを記録円盤の径より小に形成したこ
とを特徴とする記録円盤再生装置。
In a recording disc playback device that plays a recording disc while it is placed on a turntable connected to a motor and rotated,
A recording disk reproducing device characterized in that the turntable is formed to have a diameter smaller than that of the recording disk.
JP20626485A 1985-09-20 1985-09-20 Recording disk reproducing device Pending JPS6267767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20626485A JPS6267767A (en) 1985-09-20 1985-09-20 Recording disk reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20626485A JPS6267767A (en) 1985-09-20 1985-09-20 Recording disk reproducing device

Publications (1)

Publication Number Publication Date
JPS6267767A true JPS6267767A (en) 1987-03-27

Family

ID=16520448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20626485A Pending JPS6267767A (en) 1985-09-20 1985-09-20 Recording disk reproducing device

Country Status (1)

Country Link
JP (1) JPS6267767A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63181140U (en) * 1987-05-11 1988-11-22
CN105436654A (en) * 2015-12-27 2016-03-30 天津尚吉液压设备有限公司 Automatic flame cutting machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63181140U (en) * 1987-05-11 1988-11-22
JPH0422437Y2 (en) * 1987-05-11 1992-05-22
CN105436654A (en) * 2015-12-27 2016-03-30 天津尚吉液压设备有限公司 Automatic flame cutting machine

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