JPS636936B2 - - Google Patents
Info
- Publication number
- JPS636936B2 JPS636936B2 JP56030984A JP3098481A JPS636936B2 JP S636936 B2 JPS636936 B2 JP S636936B2 JP 56030984 A JP56030984 A JP 56030984A JP 3098481 A JP3098481 A JP 3098481A JP S636936 B2 JPS636936 B2 JP S636936B2
- Authority
- JP
- Japan
- Prior art keywords
- turntable
- output
- record
- circuit
- electrical output
- 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
- 241001422033 Thestylus Species 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
Landscapes
- Rotational Drive Of Disk (AREA)
Description
【発明の詳細な説明】
本発明はレコードプレーヤに係り、特に手動操
作によつてターンテーブルを回動させる場合の改
良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record player, and particularly to an improvement in rotating a turntable by manual operation.
従来、放送局に於て、レコードプレーヤより放
送をオンエアさせる場合、或はテープレコーダ等
にレコード盤上の信号を記録する場合に、ターン
テーブル上に載置したレコード盤上の所定曲目位
置にピツクアツプカートリツジの針先を降下さ
せ、ターンテーブルの外周を手で回転させて、曲
間の頭位置に針先を持ち来たすようにしている。 Conventionally, in broadcasting stations, when broadcasting from a record player or when recording a signal on a record on a tape recorder, etc., it is necessary to pick up a predetermined track position on a record placed on a turntable. The stylus tip of the cartridge is lowered and the outer periphery of the turntable is rotated by hand to bring the stylus tip to the beginning of the song.
このような放送局でのレコード放送に於ては、
１放のレコード盤の一面に記録した複数の異なる
記録帯から選択的に再生することが多く、而も、
その選択操作は放送直前に於てなされる。一般
に、レコード盤の記録帯の直前に在る無記録帯に
ピツクアツプの針先を降して待機し、所定時間を
経過して後、瞬時演奏状態に入る位置に針先を降
ろす位置を定めなければならない。この様な微少
範囲内での位置設定を、上記した様に、ターンテ
ーブルを手で回転させて行う場合には、次の様な
欠点を生ずる。即ち、
(1) レコード盤上にカートリツジの針先を対接さ
せたまま、レコード盤の所定位置に針先を移動
させるときに、手によつてターンテーブルを回
転させるが、この場合、人によつてターンテー
ブルの回転速度が異なり、カートリツジの針先
を傷める。 When broadcasting records on such broadcasting stations,
It is often the case that a single broadcast record is selectively played back from multiple different recording bands recorded on one side, and
The selection operation is performed immediately before broadcasting. In general, you must lower the pick-up stylus tip onto the blank zone immediately before the recording zone of the record, wait, and after a predetermined period of time have elapsed, determine the position at which you will lower the stylus tip to the point where it will enter instantaneous play mode. Must be. When setting the position within such a minute range by manually rotating the turntable as described above, the following drawbacks occur. (1) When moving the stylus to a predetermined position on the record while keeping the stylus of the cartridge in contact with the record, the turntable is rotated by hand; in this case, no human intervention is required. As a result, the rotation speed of the turntable is different, which may damage the stylus tip of the cartridge.
(2) ターンテーブルをレコード盤の直径より大き
くしなければならない。このため、回転トルク
が増大する。現用のターンテーブルの直径は、
35.0cmであり、33 1/3回転とし、0.2秒で立ち
上るとしても、モータの回転トルクは、12Kgcm
となり、一般のドメステイク用のターンテーブ
ルの0.6〜２Kgcmの回転トルクに比べて、約６
倍近い値となる。(2) The turntable must be larger than the diameter of the record. Therefore, the rotational torque increases. The diameter of the current turntable is
Even if the motor is 35.0cm, rotates 33 1/3 times, and starts up in 0.2 seconds, the rotational torque of the motor is 12Kgcm.
This means that the rotational torque is approximately 6 kgcm compared to the 0.6 to 2 kgcm of a general domestic turntable.
The value is almost double.
本発明は、上述の如き従来の欠点を除去したレ
コードプレーヤを提供するもので、本発明の特徴
とするところは、ターンテーブルを摘みにより正
逆回転させることが出来るようになしたレコード
プレーヤにある。 The present invention provides a record player that eliminates the above-mentioned drawbacks of the conventional record player.The present invention is characterized by a record player in which the turntable can be rotated forward and backward using a knob. .
以下、本発明の１実施例を、図面について詳記
する。第１図は本発明に用いる検出部及び原理的
系統図を示すもので、ターンテーブル１の周辺に
磁性材料２をコーテイングして、その上に、第２
図Ａに示す如き検出用のパルスＰを記録する。こ
の様な磁気パルスＰを、磁気ヘツド４によつて検
出し、その検出出力を、処理回路５に加えると共
に、操作摘み６に嵌着した後述の可変抵抗器より
の出力も、処理回路５に加え、それよりの比較出
力をモータ３に加え、これを正逆方向に回転させ
る様にしている。 Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a detection unit and a principle system diagram used in the present invention, in which a magnetic material 2 is coated around a turntable 1, and a second
A detection pulse P as shown in Figure A is recorded. Such a magnetic pulse P is detected by the magnetic head 4, and the detection output is applied to the processing circuit 5, and an output from a variable resistor, which will be described later, fitted to the operating knob 6 is also applied to the processing circuit 5. In addition, the comparison output is applied to the motor 3 to rotate it in forward and reverse directions.
上述の処理回路５の詳細を第３図について詳記
する。ターンテーブル１の周辺にコーテイングし
た磁性材料２に記録した磁気パルスＰを磁気ヘツ
ド４により検出し、このパルスＰを増巾回路８に
加え、これより第２図Ｂに示す如き正弦波に近い
波形Ｓを得、これを波形整形回路９に加えて波形
整形し、第２図Ｃに示す如き所定幅のパルス信号
Pwを得、これをカウント回路１０によりカウン
トし、その出力を次段のデジタル−アナログ変換
回路１１に加え、デジタル−アナログ変換し、そ
の出力を、比較回路１２に加える。 Details of the above-mentioned processing circuit 5 will be described in detail with reference to FIG. The magnetic pulse P recorded on the magnetic material 2 coated around the turntable 1 is detected by the magnetic head 4, and this pulse P is applied to the amplification circuit 8, which produces a waveform close to a sine wave as shown in FIG. 2B. S is obtained, and this is added to the waveform shaping circuit 9 to shape the waveform, thereby producing a pulse signal of a predetermined width as shown in FIG. 2C.
Pw is obtained, counted by the counting circuit 10, and its output is applied to the next stage digital-to-analog conversion circuit 11 for digital-to-analog conversion, and the output is applied to the comparison circuit 12.
一方、固定ダイアル目盛７の中心軸に嵌挿した
可変抵抗器１３の軸に嵌着した摘み６を、回転さ
せて、摘み６の指標６ａを、所定のダイアル目盛
位置迄回動させ、可変抵抗器１３の両端に加えら
れた基準電圧Ｅを回転角に比例して分圧し、電圧
Evを得、これを比較回路１２に加える。尚この
比較回路１２を、差動増巾器等より形成し、この
差動増巾器よりの出力を、モータ駆動回路１４を
通じてモータ３に加え、このモータ３を制御す
る。 On the other hand, the knob 6 fitted on the shaft of the variable resistor 13 fitted on the central axis of the fixed dial scale 7 is rotated, the index 6a of the knob 6 is rotated to a predetermined dial scale position, and the variable resistance The reference voltage E applied to both ends of the device 13 is divided in proportion to the rotation angle, and the voltage
Ev is obtained and added to the comparison circuit 12. The comparator circuit 12 is formed from a differential amplifier or the like, and the output from the differential amplifier is applied to the motor 3 through a motor drive circuit 14 to control the motor 3.
本発明は、上述の如く構成したので、摘み６の
指標６ａを、ターンテーブル１の回転角度に対応
するダイアル目盛７の所定位置迄回転させれば、
ターンテーブル１も、ダイアル目盛７の角度に対
応した位置迄回動して、比較回路１２の出力が零
となる角度で停止する。 Since the present invention is configured as described above, if the indicator 6a of the knob 6 is rotated to a predetermined position on the dial scale 7 corresponding to the rotation angle of the turntable 1,
The turntable 1 also rotates to a position corresponding to the angle of the dial scale 7, and stops at an angle at which the output of the comparator circuit 12 becomes zero.
本発明では、レコード盤上に載置したピツクア
ツプの針先位置を頭出しする時に、可変抵抗器１
３に加える基準電圧＋Ｅの電圧値を所定電圧以下
に選択すれば、モータ３の回動速度を一定に抑え
ることが可能である。 In the present invention, when locating the stylus position of a pickup placed on a record, the variable resistor 1
If the voltage value of the reference voltage +E added to the reference voltage +E is selected to be equal to or less than a predetermined voltage, it is possible to keep the rotational speed of the motor 3 constant.
本発明は叙上の如く構成したものであるから、
頭出し時に、ターンテーブル１を手動で回転させ
る必要がなく、ターンテーブル１の直径を大きく
する必要もなくなるので、駆動モータ３として、
トルク力の小さなものを使用することが出来る。 Since the present invention is constructed as described above,
There is no need to manually rotate the turntable 1 during cueing, and there is no need to increase the diameter of the turntable 1.
It is possible to use one with a small torque force.
更に、レコード盤上に置かれるカートリツジの
針先を傷つけることもなく、又、ターンテーブル
１の周辺に記録した検出パルスＰとしては、レコ
ードプレーヤの回転数サーボの基準パルスとして
コーテイングしたものをそのまま用いることが出
来る等の、多くの特徴を有するものである。 Furthermore, the stylus tip of the cartridge placed on the record is not damaged, and the detection pulse P recorded around the turntable 1 is directly used as a reference pulse for the rotation speed servo of the record player. It has many features such as the ability to
第１図は本発明の検出部及び原理的系統図、第
２図は本発明の動作波形説明図、第３図は本発明
の全体の系統図である。
図に於て、１はターンテーブル、２は磁性材
料、３はモータ、４は磁気ヘツド、５は処理回
路、６は摘み、７は目盛、８は増巾回路、９は波
形整形回路、１０はカウント回路、１１はデジタ
ル−アナログ変換回路、１２は比較回路、１３は
可変抵抗器である。
FIG. 1 is a detection unit and principle system diagram of the present invention, FIG. 2 is an explanatory diagram of operating waveforms of the present invention, and FIG. 3 is an overall system diagram of the present invention. In the figure, 1 is a turntable, 2 is a magnetic material, 3 is a motor, 4 is a magnetic head, 5 is a processing circuit, 6 is a knob, 7 is a scale, 8 is an amplification circuit, 9 is a waveform shaping circuit, 10 1 is a count circuit, 11 is a digital-to-analog conversion circuit, 12 is a comparison circuit, and 13 is a variable resistor.
Claims (1)
たターンテーブル手段と、 上記ターンテーブル周辺に記録したパルス信号
を再生する再生手段と、 上記再生手段から上記ターンテーブル手段の回
転角度に対応した第１の電気出力を得る第１の電
気出力手段と、 手動の摘みの移動量に応じた第２の電気出力を
得る第２の電気出力手段と、 上記第１及び第２の電気出力手段の出力を比較
する比較手段とを有し、 上記比較手段の出力で上記ターンテーブル手段
の駆動モータを制御し、該比較手段の出力を零も
しくは所定値になるようにしてなることを特徴と
するレコードプレーヤ。[Claims] 1. A turntable means having a pulse signal recorded around the turntable, a reproducing means for reproducing the pulse signal recorded around the turntable, and a rotation angle of the turntable means from the reproducing means. a first electrical output means that obtains a corresponding first electrical output; a second electrical output means that obtains a second electrical output that corresponds to the amount of movement of the manual knob; and the first and second electrical outputs. and a comparison means for comparing the outputs of the means, and the drive motor of the turntable means is controlled by the output of the comparison means so that the output of the comparison means becomes zero or a predetermined value. record player.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3098481A JPS57147163A (en) | 1981-03-04 | 1981-03-04 | Record player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3098481A JPS57147163A (en) | 1981-03-04 | 1981-03-04 | Record player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57147163A JPS57147163A (en) | 1982-09-10 |
| JPS636936B2 true JPS636936B2 (en) | 1988-02-13 |
Family
ID=12318889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3098481A Granted JPS57147163A (en) | 1981-03-04 | 1981-03-04 | Record player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57147163A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2509390Y2 (en) * | 1988-12-19 | 1996-09-04 | 株式会社小松製作所 | Retarder oil cooler mounting device for construction equipment dump trucks |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036998B2 (en) * | 1971-12-07 | 1975-11-28 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538956Y2 (en) * | 1973-08-07 | 1980-09-11 |
-
1981
- 1981-03-04 JP JP3098481A patent/JPS57147163A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036998B2 (en) * | 1971-12-07 | 1975-11-28 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2509390Y2 (en) * | 1988-12-19 | 1996-09-04 | 株式会社小松製作所 | Retarder oil cooler mounting device for construction equipment dump trucks |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57147163A (en) | 1982-09-10 |
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