JPH01311403A - Rotary head type magnetic recording and reproducing device - Google Patents

Rotary head type magnetic recording and reproducing device

Info

Publication number
JPH01311403A
JPH01311403A JP14042988A JP14042988A JPH01311403A JP H01311403 A JPH01311403 A JP H01311403A JP 14042988 A JP14042988 A JP 14042988A JP 14042988 A JP14042988 A JP 14042988A JP H01311403 A JPH01311403 A JP H01311403A
Authority
JP
Japan
Prior art keywords
battery
signal processing
processing circuit
magnetic recording
rotary drum
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
JP14042988A
Other languages
Japanese (ja)
Inventor
Akihiro Mimoto
章浩 見元
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14042988A priority Critical patent/JPH01311403A/en
Publication of JPH01311403A publication Critical patent/JPH01311403A/en
Pending legal-status Critical Current

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  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To improve an S/N characteristic by eliminating a noise due to the imperfect constant of a shaft with a brush by loading a signal processing circuit and a battery on the rotary drum of a rotary head type magnetic recording and reproducing device. CONSTITUTION:When a signal which shows the turning on of a power source is supplied from a rotary transformer 21 and a transistor 23 is turned on, a current flows on a resistor 27 and between the base and the emitter of a transistor 24, then, the transistor 24 is turned on, and the power of the battery 26 is supplied to a circuit via an electrolytic capacitor 25. The rotary drum 12, the battery 14, and the signal processing circuit 15 incorporated in the rotary drum are provided, and the power for the signal processing circuit 15 in the rotary drum is supplied from the battery 14. Since the internal impedance of the battery 14 is suppressed at low several tens mOMEGA sufficiently and a few amount of noises exist, it is enough to prepare a capacitor small in capacity for ripple filtering,and also, since the cylindrical battery 14 is embedded in the center of the shaft, no problem of inertia balance is generated, and since friction between a ground brush 11 and a sliding noise are not related to the power source, a favorable effect on jitter and an S/N characteristic can be obtained.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、回転ドラムに電気回路を内蔵した回転ヘット
式磁気記録装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating head type magnetic recording device in which an electric circuit is built in a rotating drum.

[従来の技術] 第5図は従来の信号処理回路を内蔵した回転ヘット式磁
気記録再生装置の回転ドラムの斜視図である。第5図に
おいて、51は回転ドラムの軸。
[Prior Art] FIG. 5 is a perspective view of a rotating drum of a rotating head type magnetic recording and reproducing device incorporating a conventional signal processing circuit. In FIG. 5, 51 is the shaft of the rotating drum.

52は電流を供給するためにブラシ、53はアースブラ
シである。
52 is a brush for supplying current, and 53 is a ground brush.

従来から、ロータリトランスでは回路を駆動するのに充
分な電力を送れないので、第5図に示すように回転トラ
ムの軸51にブラシ52及びアースブラシ53を接触さ
せ、これらブラシ52゜53を介して回転ドラム内に設
けられた信号処理回路に電力を供給している。
Conventionally, since a rotary transformer cannot send enough power to drive a circuit, a brush 52 and a ground brush 53 are brought into contact with the shaft 51 of a rotating tram as shown in FIG. power is supplied to a signal processing circuit provided inside the rotating drum.

[発明が解決しようとする課題] 上記のように従来の回転ドラムては軸とブラシとの接触
部からノイズが発生するという問題があり、また摩擦力
によるトルクアップ、さらには電源のリップルを取除く
必要等から大きな電解コンデンサを回転ドラム内の基板
に乗せなければならなかった。従って、この大きな電解
コンデンサを回転ドラムに搭載することによってイナー
シャバランスが悪化するという欠点を有していた。
[Problems to be Solved by the Invention] As mentioned above, conventional rotating drums have the problem of noise generation from the contact area between the shaft and the brushes, as well as an increase in torque due to frictional force, and furthermore, problems with ripples in the power supply. Due to the need to remove large electrolytic capacitors, a large electrolytic capacitor had to be mounted on a board inside the rotating drum. Therefore, mounting this large electrolytic capacitor on the rotating drum has the disadvantage that the inertia balance deteriorates.

この発明はかかる課題を解決するためになされたもので
、外部から電源の供給を受けることをやめて、ブラシの
使用をなくし、かつ外部電源によるリップルの影響の全
くない回転ヘッド式磁気記録再生装備を提供することを
目的とする。
This invention was made to solve these problems, and provides a rotating head type magnetic recording and reproducing device that does not receive power from an external source, eliminates the use of brushes, and is completely free from ripple effects caused by external power. The purpose is to provide.

[課題を解決するための手段] 上記の目的を達成するために、この発明は回転ヘット式
磁気記録再生装置の回転ドラムに、信号処理回路とバッ
テリとを搭載したものである。
[Means for Solving the Problems] In order to achieve the above object, the present invention is such that a signal processing circuit and a battery are mounted on a rotating drum of a rotating head type magnetic recording/reproducing device.

[作用] 上記の構成を有することにより、電源用の軸とブラシを
省略することを可能にしたものである。
[Function] With the above configuration, it is possible to omit the power supply shaft and brush.

[実施例〕 :51図はこの発明の回転ヘッド式磁気記録再生装置の
一実施例である回転1〜ラムの構成を示す組立図て、1
1はアースブラシ、12は回転ドラム、13はバッテリ
押え、14はバッテリ、15は回転ドラムに内蔵された
信号処理回路、16は固定トラム、17はヘットである
。第1図において、回転ドラム内の信号処理回路15は
バッテリ14から電力か供給される。バッテリ14の内
部インピーダンスは数10mΩと充分に低く、ノイズか
少ないためリップルフィルタ用のコンデンサは小容量の
もので充分である。また、軸の中心に筒形のバッテリ1
4を埋込むのでイナーシャバランスは問題ない。また、
アースブラシ11と軸との摩擦及び摺動ノイズか電源に
関してはないのて、ジッタ及びS/N特性に関しては有
利である。
[Example]: Figure 51 is an assembly diagram showing the configuration of rotation 1 to ram, which is an embodiment of the rotary head type magnetic recording and reproducing apparatus of the present invention.
1 is a ground brush, 12 is a rotating drum, 13 is a battery holder, 14 is a battery, 15 is a signal processing circuit built into the rotating drum, 16 is a fixed tram, and 17 is a head. In FIG. 1, a signal processing circuit 15 in a rotating drum is supplied with power from a battery 14. In FIG. The internal impedance of the battery 14 is sufficiently low at several tens of mΩ, and noise is low, so a capacitor of small capacity for the ripple filter is sufficient. In addition, there is a cylindrical battery 1 in the center of the shaft.
4 is embedded, so there is no problem with inertia balance. Also,
Since there is no friction and sliding noise between the earth brush 11 and the shaft, and there is no power supply, it is advantageous in terms of jitter and S/N characteristics.

また、搭載したバッテリ14の寿命の問題が考えられる
が、第2図に示すようなスイッチ回路を使用し、バッテ
リ14も容量5Ahのものを用いて回路電流を10mA
程度にすれば、バッテリの寿命も500時間になるのて
ヘッド交換と同じ寿命になってバッテリ14と同時に交
換すればよい。
In addition, there may be a problem with the lifespan of the installed battery 14, but by using a switch circuit as shown in Figure 2 and using a battery 14 with a capacity of 5Ah, the circuit current can be reduced to 10mA.
If this is done, the battery life will be 500 hours, which is the same lifespan as replacing the head, so it is sufficient to replace the battery 14 at the same time.

第2図は第1図のスイッチ回路を具体的に示した回路図
である。
FIG. 2 is a circuit diagram specifically showing the switch circuit of FIG. 1.

第2図において、ロータリトランス21より電源ONの
信号が整流器22に供給され、トランジスタ23かON
すると抵抗27とトランジスタ24のベース−エミッタ
間に電流か流れ、トランジスタ24かONになり、バッ
テリ26のパワーか電解コンデンサ25を通り回路へ供
給される。
In FIG. 2, a power ON signal is supplied from a rotary transformer 21 to a rectifier 22, and a transistor 23 is turned ON.
Then, a current flows between the resistor 27 and the base-emitter of the transistor 24, turning on the transistor 24, and power from the battery 26 is supplied to the circuit through the electrolytic capacitor 25.

この場合、ロータリトランスか1ヶ増えることになるか
、このトランスは構造としては小さく、また、ローコス
トで性能の良さは要求されないので、それほど問題には
ならない。
In this case, one more rotary transformer will be added, but this transformer is small in structure and low cost and high performance are not required, so it is not a big problem.

第3図は機械的手段により接点の開閉を行う他の実施例
を示す構成図である。回転ドラム35内に電極31とお
もり33を有する電極32があり、回転トラム35のベ
ース34に固定されている。
FIG. 3 is a block diagram showing another embodiment in which contacts are opened and closed by mechanical means. Inside the rotating drum 35 there is an electrode 32 having an electrode 31 and a weight 33, which is fixed to the base 34 of the rotating tram 35.

いま、回転ドラム35か回転すると、おもり33に(動
く遠心力により電極31.32が接触して接点が閉じる
。その後、回転ドラム35か止まると、電極32は自己
のバネ性によりもとに戻り、電極31.32の接点が開
く。
Now, when the rotating drum 35 rotates, the electrodes 31 and 32 come into contact with the weight 33 (due to the moving centrifugal force) and the contact closes. After that, when the rotating drum 35 stops, the electrodes 32 return to their original positions due to their own spring properties. , the contacts of electrodes 31,32 open.

また、第4図はリレーを使用したスイッチ回路の他の実
施例を示す回路図である。第4図において、ロータリト
ランス41にスイッチONの信号か入力されると、整流
器42にて整流され、トランジスタ43をONにする。
Moreover, FIG. 4 is a circuit diagram showing another embodiment of a switch circuit using a relay. In FIG. 4, when a switch ON signal is input to a rotary transformer 41, the signal is rectified by a rectifier 42 and a transistor 43 is turned ON.

その結果、リレー45にバッテリ46から電流か流れ、
コンデンサ47を通り回路に供給される。44は逆起電
力吸収用のタイオードである。
As a result, current flows from the battery 46 to the relay 45,
It is supplied to the circuit through a capacitor 47. 44 is a diode for absorbing back electromotive force.

[発明の効果] 以上説明したように、本発明によれば簡単な構成で電源
供給用の軸とフラジを省略した回転ドラム装置か得られ
、これにより軸とブラシを使用した従来のものに比べて
、以下に示す有利な特徴を有する。
[Effects of the Invention] As explained above, according to the present invention, a rotating drum device with a simple configuration and omitting a shaft and flange for power supply can be obtained, which is superior to conventional devices using a shaft and brushes. It has the following advantageous characteristics:

■軸とブラシとの接触不良によるノイズが0になるので
、S/N特性か向上する。
■Since the noise caused by poor contact between the shaft and the brush is reduced to zero, the S/N characteristics are improved.

■低インピーダンスのバッテリから電源か供給されるた
め、リップルフィルタ用のコンデンサは小容量のものて
よく、これを回転ドラム内の基板に取付けたとしてもイ
ナーシャバランスは悪化しにくい。
■Since power is supplied from a low-impedance battery, the capacitor for the ripple filter can be of small capacity, and even if it is attached to the board inside the rotating drum, the inertia balance is unlikely to deteriorate.

Q)回転ドラムに内蔵された信号処理回路と電源の距離
が近くなり、アースインピーダンスか低くなるのて外部
からの信号の飛込みか少なく、配線の引まわし等が最小
になるので高帯域の記録・再生が可能になる。また、信
号処理回路を内蔵しているのでヘッドの切換を回転ドラ
ム内で行うようにすれば、信号処理回路を内蔵していな
いものに比へてロータリトランスの数を約半分にするこ
とか可能になる。
Q) The distance between the signal processing circuit built into the rotating drum and the power supply becomes closer, and the earth impedance is lowered, so there is less intrusion of signals from the outside, and wiring, etc. is minimized, making it possible to record high frequency bands. Playback becomes possible. In addition, since it has a built-in signal processing circuit, if the head switching is done inside the rotating drum, the number of rotary transformers can be reduced to about half compared to a model that does not have a built-in signal processing circuit. become.

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

第1図はこの発明の回転ヘッド式磁気記録再生装置の一
実施例である回転ドラムの構成を示す組立図、第2図は
第1図のスイッチ回路を具体的に示した回路図、第3図
は機械的手段により接点の開閉を行う他の実施例を示す
構成図、第4図はリレーを使用したスイッチ回路の他の
実施例を示す回路図、第5図は従来の信号処理回路を内
蔵した回転ヘッド式磁気記録再生装置の回転ドラムの詔
視図である。 図中。 11:アースブラシ  12.:15:回転トラム13
:バッテリ押え  14,26,46 :バッテリ15
:ヘッドが搭載された信号処理回路16:固定ドラム 
  17:ヘット 21.41:ロータリトタンス 22.42:整流器 23.24,43 : )−ランジスタ25.47:電
解コンデンサ 27:抵抗      31,32:電極33:おもり
     34:ベース 44:ダイオード   45:リレー 代理人 弁理士 1)北 嵩 晴 第2間 ′−3ワ 第 47 第 5 間
FIG. 1 is an assembly diagram showing the configuration of a rotating drum which is an embodiment of the rotary head type magnetic recording/reproducing device of the present invention, FIG. 2 is a circuit diagram specifically showing the switch circuit of FIG. 1, and FIG. Figure 4 is a block diagram showing another embodiment of a switch circuit that uses mechanical means to open and close contacts, Figure 4 is a circuit diagram of another embodiment of a switch circuit using relays, and Figure 5 is a circuit diagram of a conventional signal processing circuit. FIG. 2 is a perspective view of a rotating drum of a built-in rotary head type magnetic recording/reproducing device. In the figure. 11: Earth brush 12. :15: Rotating tram 13
:Battery holder 14, 26, 46 :Battery 15
: Signal processing circuit with head mounted 16 : Fixed drum
17: Het 21. 41: Rotary resistor 22. 42: Rectifier 23. 24, 43: ) - Ransistor 25. 47: Electrolytic capacitor 27: Resistor 31, 32: Electrode 33: Weight 34: Base 44: Diode 45: Relay Agent Patent Attorney 1) Haru Kitatake, Room 2'-3, Room 47, Room 5

Claims (2)

【特許請求の範囲】[Claims] (1)回転ヘッド式磁気記録再生装置の回転ドラムに、
信号処理回路とバッテリとを搭載したことを特徴とする
回転ヘッド式磁気記録再生装置。
(1) On the rotating drum of a rotating head type magnetic recording and reproducing device,
A rotary head type magnetic recording and reproducing device characterized by being equipped with a signal processing circuit and a battery.
(2)バッテリからの電源回路を開閉する手段を具備し
たことを特徴とする請求項(1)に記載の回転ヘッド式
磁気記録再生装置。
(2) The rotary head type magnetic recording and reproducing apparatus according to claim (1), further comprising means for opening and closing a power supply circuit from a battery.
JP14042988A 1988-06-09 1988-06-09 Rotary head type magnetic recording and reproducing device Pending JPH01311403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14042988A JPH01311403A (en) 1988-06-09 1988-06-09 Rotary head type magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14042988A JPH01311403A (en) 1988-06-09 1988-06-09 Rotary head type magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPH01311403A true JPH01311403A (en) 1989-12-15

Family

ID=15268477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14042988A Pending JPH01311403A (en) 1988-06-09 1988-06-09 Rotary head type magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPH01311403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0883111A2 (en) * 1997-06-02 1998-12-09 Deutsche Thomson-Brandt Gmbh Head drum with integrated power supply

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0883111A2 (en) * 1997-06-02 1998-12-09 Deutsche Thomson-Brandt Gmbh Head drum with integrated power supply
EP0883111A3 (en) * 1997-06-02 2000-06-28 Deutsche Thomson-Brandt Gmbh Head drum with integrated power supply
EP1111590A2 (en) * 1997-06-02 2001-06-27 Deutsche Thomson-Brandt Gmbh Head drum for a magnetic tape recorder
EP1111590A3 (en) * 1997-06-02 2001-09-12 Deutsche Thomson-Brandt Gmbh Head drum for a magnetic tape recorder

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