JP2000048330A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JP2000048330A
JP2000048330A JP10212271A JP21227198A JP2000048330A JP 2000048330 A JP2000048330 A JP 2000048330A JP 10212271 A JP10212271 A JP 10212271A JP 21227198 A JP21227198 A JP 21227198A JP 2000048330 A JP2000048330 A JP 2000048330A
Authority
JP
Japan
Prior art keywords
head
output level
magnetic head
level
cleaning
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
JP10212271A
Other languages
Japanese (ja)
Inventor
Yasuo Yamazoe
泰生 山添
Toru Ishii
亨 石井
Kazuya Yamashita
和也 山下
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.)
Hitachi Image Information Systems Inc
Hitachi Ltd
Original Assignee
Hitachi Image Information Systems Inc
Hitachi Ltd
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 Hitachi Image Information Systems Inc, Hitachi Ltd filed Critical Hitachi Image Information Systems Inc
Priority to JP10212271A priority Critical patent/JP2000048330A/en
Publication of JP2000048330A publication Critical patent/JP2000048330A/en
Pending legal-status Critical Current

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  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PROBLEM TO BE SOLVED: To detect dirt of a magnetic head without providing a detecting mechanism newly by allowing a cleaning means to be automatically driven when an output level is judged not to be larger than a reference level by an output level judging means. SOLUTION: The signal recorded on an magnetic tape 1 is reproduced by a rotating magnetic head 2 to be inputted to a detecting circuit 3. A comparing and judging circuit 4 compares a signal level with a reference level, judges the result, and inputs the judgement result to a microcomputer 5. When the rotating magnetic head 2 is soiled, the output level of the signal is lowered and when it becomes smaller than the reference level by making the setting of the circuit 4 the reference level, the circuit 4 inputs the judgement result that the head is soiled to the computer 5, which cleans up dirt of the head 2 by pushing a cleaning roller 10 against the head 2 while driving a head cleaning mechanism 6.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は回転磁気ヘッドを有
する磁気記録再生装置に係り、特に回転磁気ヘッドのク
リーニング技術に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus having a rotating magnetic head, and more particularly to a technique for cleaning a rotating magnetic head.

【0002】[0002]

【従来の技術】従来のビデオテープレコーダー等の磁気
記録再生装置においてヘッドクリーニング機構が搭載さ
れたものは、磁気テープの装着、排出のたびにヘッドク
リーニング機構を駆動していた。
2. Description of the Related Art In a conventional magnetic recording / reproducing apparatus such as a video tape recorder equipped with a head cleaning mechanism, the head cleaning mechanism is driven each time a magnetic tape is mounted or ejected.

【0003】一方、公開特許公報、特開平7−1922
31号公報では、回転磁気ヘッドのギャップ面に光を照
射し、ギャップ面からの反射光を受講素子で受け、回転
磁気ヘッドのギャップ面の汚れ状態を示す信号を得てい
る。又、該検出信号に応答して、クリーニングローラを
回転ドラムに押しつける構成が開示されている。
[0003] On the other hand, Japanese Patent Laid-Open Publication No. 7-1922
In Japanese Patent Publication No. 31, a light is radiated to a gap surface of a rotary magnetic head, and reflected light from the gap surface is received by a student element to obtain a signal indicating a dirty state of the gap surface of the rotary magnetic head. Further, a configuration is disclosed in which a cleaning roller is pressed against a rotating drum in response to the detection signal.

【0004】[0004]

【発明が解決しようとする課題】上記先行技術の構成
は、前者は回転ヘッドの汚れ具合に関係なくヘッドクリ
ーニングを行い、後者は、回転ヘッドの汚れを検出して
ヘッドクリーニングを行うが、検出の為の光学システム
が新たに必要となるという問題があった。
In the prior art configuration, the former performs head cleaning regardless of the degree of dirt on the rotary head, and the latter performs head cleaning by detecting dirt on the rotary head. There is a problem that a new optical system is required for this.

【0005】[0005]

【課題を解決するための手段】ビデオテープレコーダー
等、回転磁気ヘッドを有する磁気記録再生装置の中に
は、オートトラッキングを行う為に、回転磁気ヘッドの
出力を検出する出力レベル検出手段と、その出力レベル
を比較判定する出力レベル判定手段を既に有している磁
気記録再生装置もある。
In a magnetic recording / reproducing apparatus having a rotating magnetic head, such as a video tape recorder, an output level detecting means for detecting an output of the rotating magnetic head in order to perform auto-tracking, Some magnetic recording / reproducing devices already have output level determining means for comparing and determining output levels.

【0006】これらの手段を用いる事により、回転磁気
ヘッドの出力レベルの低下を検知する事が出来、それを
用いて回転磁気ヘッドの汚れ具合を判定する事が出来
る。
By using these means, it is possible to detect a decrease in the output level of the rotary magnetic head, and it is possible to judge the degree of contamination of the rotary magnetic head by using this.

【0007】その汚れに応じて、オートヘッドクリーニ
ングを駆動する。これにより、新たな光学システムを追
加する事なく、回転磁気ヘッドの汚れに応じてヘッドク
リーニングを行う事が出来る。
The automatic head cleaning is driven according to the contamination. Thus, head cleaning can be performed according to dirt on the rotary magnetic head without adding a new optical system.

【0008】[0008]

【発明の実施の形態】以下本発明の具体的な一実施例を
図面を用いて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings.

【0009】図1は、本発明による磁気記録再生装置の
基本構成図、図2は、正常な時の磁気ヘッドの出力レベ
ル例、図3は、磁気ヘッドが汚れた時の出力レベル例を
示す。
FIG. 1 is a diagram showing the basic configuration of a magnetic recording / reproducing apparatus according to the present invention, FIG. 2 is an example of an output level of a magnetic head when it is normal, and FIG. 3 is an example of an output level when the magnetic head is dirty. .

【0010】磁気テープ1に記録されている信号は、回
転磁気ヘッド2により再生され、検出回路3に入力され
る。比較判定回路4では、信号レベルを基準レベルと比
較判定され、マイクロコンピュータ5に判定結果を入力
する。
The signal recorded on the magnetic tape 1 is reproduced by the rotary magnetic head 2 and input to the detection circuit 3. The comparison and judgment circuit 4 compares and judges the signal level with the reference level, and inputs the judgment result to the microcomputer 5.

【0011】回転磁気ヘッド2が正常な場合は、図2の
ような出力レベルとなり、この場合ヘッドクリーニング
は必要としない。
When the rotating magnetic head 2 is normal, the output level is as shown in FIG. 2. In this case, head cleaning is not required.

【0012】回転磁気ヘッドが汚れた場合は、図3磁気
ヘッドが汚れた時の出力レベル8のようにレベルが小さ
くなってしまう。
When the rotary magnetic head becomes dirty, the output level becomes small as shown in FIG. 3 when the magnetic head is dirty.

【0013】比較判定回路4の設定を基準レベル9にし
ておき、基準レベル9を下回る場合、マイクロコンピュ
ータ5に「ヘッド汚れ」との判定結果を入力する。
The setting of the comparison and judgment circuit 4 is set to a reference level 9, and when the setting is lower than the reference level 9, a judgment result of "head dirt" is input to the microcomputer 5.

【0014】マイクロコンピュータ5は、その場合ヘッ
ドクリーニング機構6を駆動し、クリーニングローラ1
0を回転磁気ヘッド2に押し当てて、回転磁気ヘッド2
の汚れをクリーニングする。
In this case, the microcomputer 5 drives the head cleaning mechanism 6 and the cleaning roller 1
0 against the rotating magnetic head 2
Clean the dirt.

【0015】検出回路3、比較判定回路4、マイクロコ
ンピュータ5は、多くのビデオテープエコーダで特にす
でに採用されているオートトラッキング機構と共用出来
る。
The detecting circuit 3, the comparing and judging circuit 4, and the microcomputer 5 can be used in common with an auto-tracking mechanism which is already employed in many video tape echoes.

【0016】[0016]

【発明の効果】本発明によれば、新たに検出機構を設け
る事なく磁気ヘッドの汚れを検出して適切なヘッドクリ
ーニングを行なう事が出来る。
According to the present invention, it is possible to detect dirt on the magnetic head and perform appropriate head cleaning without providing a new detection mechanism.

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

【図1】本発明による磁気記録再生装置を示す基本構成
図である。
FIG. 1 is a basic configuration diagram showing a magnetic recording / reproducing apparatus according to the present invention.

【図2】正常な時の磁気ヘッドの出力レベル例を示す図
である。
FIG. 2 is a diagram illustrating an example of an output level of a magnetic head in a normal state.

【図3】磁気ヘッドが汚れた時の出力レベル例を示す図
である。
FIG. 3 is a diagram illustrating an example of an output level when a magnetic head is dirty.

【符号の説明】[Explanation of symbols]

1…磁気テープ、2…回転磁気ヘッド、 3…検出回
路、4…比較判定回路、5…マイクロコンピュータ、
6…ヘッドクリーニング機構、7…正常な時
の磁気ヘッド出力レベル、8…磁気ヘッドが汚れた時の
出力レベル、9…基準レベル、10…クリーニングロー
ラー。
DESCRIPTION OF SYMBOLS 1 ... Magnetic tape, 2 ... Rotating magnetic head, 3 ... Detection circuit, 4 ... Comparison judgment circuit, 5 ... Microcomputer,
6: Head cleaning mechanism, 7: Normal magnetic head output level, 8: Magnetic head dirty output level, 9: Reference level, 10: Cleaning roller.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 石井 亨 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立画像情報システム内 (72)発明者 山下 和也 茨城県ひたちなか市稲田1410番地 株式会 社日立製作所AV事業部内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toru Ishii 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi Image Information System Co., Ltd. (72) Inventor Kazuya Yamashita 1410 Inada, Hitachinaka-shi, Ibaraki Co., Ltd. Hitachi, Ltd. AV Division

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】回転磁気ヘッドを有する磁気記録再生装置
であって、前記回転磁気ヘッドの出力レベルを検出する
出力レベル検出手段と、該出力レベルを基準レベルと比
較判定する出力レベル判定手段と、前記回転磁気ヘッド
をクリーニングするクリーニング手段とを備え、前記出
力レベル判定手段により前記出力レベルが前記基準レベ
ル以下と判定された場合、前記クリーニング手段を自動
的に駆動させる事を特徴とする磁気記録再生装置。
1. A magnetic recording / reproducing apparatus having a rotating magnetic head, comprising: an output level detecting means for detecting an output level of the rotating magnetic head; an output level determining means for comparing the output level with a reference level; Cleaning means for cleaning the rotating magnetic head, wherein when the output level is determined by the output level determination means to be lower than the reference level, the cleaning means is automatically driven. apparatus.
【請求項2】請求項1記載の磁気記録再生装置は、前記
回転磁気ヘッドを磁気テープ上の記録トラックに一致し
て走査させる為のオートトラッキング手段を備え、前記
出力レベル検出手段及び前記出力レベル判定手段は、該
オートトラッキング手段の一部を構成する事を特徴とす
る磁気記録再生装置。
2. The magnetic recording / reproducing apparatus according to claim 1, further comprising: auto-tracking means for scanning said rotary magnetic head so as to coincide with a recording track on a magnetic tape, said output level detecting means and said output level. A magnetic recording / reproducing apparatus, wherein the determining means forms a part of the auto tracking means.
JP10212271A 1998-07-28 1998-07-28 Magnetic recording and reproducing device Pending JP2000048330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10212271A JP2000048330A (en) 1998-07-28 1998-07-28 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10212271A JP2000048330A (en) 1998-07-28 1998-07-28 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JP2000048330A true JP2000048330A (en) 2000-02-18

Family

ID=16619839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10212271A Pending JP2000048330A (en) 1998-07-28 1998-07-28 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JP2000048330A (en)

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