JPS6227442B2 - - Google Patents
Info
- Publication number
- JPS6227442B2 JPS6227442B2 JP53016045A JP1604578A JPS6227442B2 JP S6227442 B2 JPS6227442 B2 JP S6227442B2 JP 53016045 A JP53016045 A JP 53016045A JP 1604578 A JP1604578 A JP 1604578A JP S6227442 B2 JPS6227442 B2 JP S6227442B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- head
- rotating
- recording
- core
- 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
- 238000004804 winding Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052595 hematite Inorganic materials 0.000 description 2
- 239000011019 hematite Substances 0.000 description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
Description
【発明の詳細な説明】
本発明は、高密度記録に適した回転磁気ヘツド
を備える磁気記録再生装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing apparatus equipped with a rotating magnetic head suitable for high-density recording.
高域信号より成るビデオ信号を記録する回転磁
気ヘツドは、硬度が高く特に耐摩耗性に優れたフ
エライト等の酸化物磁性材料をコアとし、ガンマ
へマタイトを記録媒体とする磁気テープに磁気記
録を為している。磁気テープの記録媒体として
は、ガンマヘマタイトの他に酸化クロームに代表
される高抗磁性媒体があり、後者は、高抗磁性故
に前者に比しノイズが少なく周波数特性にも優れ
ており、高密度記録に適している。そこでビデオ
信号等の高域信号は、高抗磁性記録媒体より成る
磁気テープに記録する方が望ましいことになる
が、フエライト材より成る回転磁気ヘツドは、低
い磁束密度で飽和状態となり、高抗磁性記録媒体
の有する特性を十分発揮し得ないという不都合を
招来する。従つて高抗磁性記録媒体より成るテー
プに高域信号を記録するためには飽和磁束密度の
高い金属性磁性材料を磁気コアとして用いた磁気
ヘツドが必要となる。しかし金属性磁性材料は電
気的抵抗が低いため、例えば磁気コアの厚さを30
μｍ迄薄くしてもFM変調した映像信号等の高域
信号を記録する場合には渦電流損失が無視できな
くなる。そこで渦電流解消のため磁気コアを更に
分割して有機接着材等で重ね合わせることも考え
られるが、薄い磁気コア用のウエーハーを単独で
更に薄くすることは困難を極め、特にセンダス
ト、パーマロイ等の軟質の金属材料では、通常の
加工限度を遥かに上回ることになるばかりか、仮
に加工して重ね合わせることができたとしても耐
摩耗性の点で強度的な保証が得られず実用には適
さない。 The rotating magnetic head that records video signals consisting of high-frequency signals has a core made of an oxide magnetic material such as ferrite, which has high hardness and excellent wear resistance, and magnetically records on a magnetic tape whose recording medium is gamma hematite. I am doing it. In addition to gamma hematite, magnetic tape recording media include high antimagnetic media represented by chromium oxide.The latter has low noise and excellent frequency characteristics compared to the former due to its high coercivity, and has a high density. Suitable for recording. Therefore, it is desirable to record high-frequency signals such as video signals on magnetic tape made of a high coercivity recording medium, but a rotating magnetic head made of ferrite material becomes saturated at a low magnetic flux density and has a high coercivity. This results in the inconvenience that the characteristics of the recording medium cannot be fully exhibited. Therefore, in order to record high-frequency signals on a tape made of a highly coercive recording medium, a magnetic head using a magnetic core made of a metallic magnetic material with a high saturation magnetic flux density is required. However, since metallic magnetic materials have low electrical resistance, the thickness of the magnetic core can be reduced by 30 mm, for example.
Even if it is made as thin as micrometers, eddy current loss cannot be ignored when recording high frequency signals such as FM modulated video signals. Therefore, in order to eliminate eddy currents, it is possible to further divide the magnetic core and overlap it with an organic adhesive, etc., but it is extremely difficult to make the wafer for the thin magnetic core even thinner by itself, and it is especially difficult to make the wafer for the thin magnetic core even thinner. For soft metal materials, not only will the processing limit be far exceeded by normal processing, but even if it is possible to process and overlap them, there is no guarantee of strength in terms of wear resistance, making them unsuitable for practical use. do not have.
そこで本発明は金属性磁性材を磁気コアとして
採用するにも拘らず渦電流損失が少なく、また薄
型にも拘らず強度的に優れた高密度記録用の回転
磁気ヘツドを使つた特殊な走査方法を提案せんと
するものである。 Therefore, the present invention uses a special scanning method using a rotating magnetic head for high-density recording, which has low eddy current loss despite using a metallic magnetic material as the magnetic core, and has excellent strength despite being thin. This is what we would like to propose.
以下本発明を図示せる一実施例に従い説明す
る。本実施例の磁気ヘツドの形状的特徴とすると
ころは、第１図に図示せる如く、非磁性板１の両
側に金属性磁気コア２ａ，２ｂを設けてコアチツ
プを形成する点と、前記非磁性板を含む前記コア
チツプに対し共通にコイル巻線３を施す点にあ
る。斯る形状的特徴は、金属性磁性材を採用する
がために高域信号を記録再生する場合に生ずる渦
電流損失を軽減する要請と、単独では製造困難と
された薄さに迄磁気コアを薄く加工する要請を満
足するよう構成した結果齋されたものである。即
ち本実施例のコアチツプの成形に際しては、まず
第２図ａに図示せる如く、亜鉛フエライトより成
る非磁性板を所定厚に鏡面研摩し、酸化ケイ素
の蒸着膜を利用したギヤツプ４…を形成した２枚
の金属性磁性板ａ，ｂを、前記非磁性板の
両面に有機接着材にて接着固定する。次いで第２
図ｂに図示せる如く前記ギヤツプ４…に沿つてコ
イル巻線孔５…を穿設すると共に前記両金属性板
ａ，ｂを所定厚に研摩し、点線で図示せる形
状にコアチツプを切削形成する。そのためコイル
巻線は磁気コア毎にすることなく、コアチツプと
して一体的に施すことになる。 The present invention will be explained below according to an illustrative embodiment. As shown in FIG. 1, the magnetic head of this embodiment is characterized in that metallic magnetic cores 2a and 2b are provided on both sides of a non-magnetic plate 1 to form a core chip, and that the non-magnetic The point is that a coil winding 3 is commonly applied to the core chip including the plate. This shape is due to the need to reduce eddy current loss that occurs when recording and reproducing high-frequency signals due to the use of metallic magnetic materials, and the need to make the magnetic core thin enough to be difficult to manufacture by itself. This was adopted as a result of the structure satisfying the demand for thin processing. That is, when molding the core chip of this example, first, as shown in FIG. 2a, a non-magnetic plate made of zinc ferrite was mirror-polished to a predetermined thickness, and gaps 4 were formed using a vapor-deposited film of silicon oxide. Two metallic magnetic plates a and b are adhesively fixed to both sides of the non-magnetic plate using an organic adhesive. Then the second
As shown in Figure b, coil winding holes 5 are bored along the gap 4, and both metal plates a and b are polished to a predetermined thickness, and a core chip is cut into the shape shown in dotted lines. . Therefore, the coil winding is not done for each magnetic core, but is done integrally as a core chip.
更に本実施例の如くヘツドギヤツプ４，４のア
ジマスを一にする回転磁気ヘツドは、前記磁気コ
ア２ａ，２ｂの厚さＷa及びＷbと、前記非磁性板
１の厚さＷの関係をＷ＞Ｗa＋Ｗbとしており、斯
る関係は、記録再生時の走査方式と関連するもの
である。即ち回転デイスクに対向的に取付けられ
た一対の同形状の回転磁気ヘツドは第３図に図示
せる如く、先ず一方の回転磁気ヘツドがトラツク
１ａ及び１ｂを走査して第１のビデオ信号を記録
し、次いで他方の回転磁気ヘツドがトラツク１ｂ
を挾んでトラツクａ及びｂを走査して第２の
ビデオ信号を記録し、更に続いて再び一方の回転
磁気ヘツドがトラツクｂを挾んでトラツクａ
及びｂを走査して第３のビデオ信号を記録し、
又更に続いて再び他方の回転磁気ヘツドがトラツ
クｂを挾んでトラツクａ及びｂを走査して
第４のビデオ信号を記録することになる。即ち回
転磁気ヘツドの一対のヘツドギヤツプは、先行し
且つ後続する磁気ヘツドの異なる一対のヘツドギ
ヤツプが形成する磁気トラツクを挾んで磁気トラ
ツクを形成する。 Furthermore, in the rotating magnetic head in which the azimuth of the head gaps 4, 4 are the same as in this embodiment, the relationship between the thicknesses W a and W b of the magnetic cores 2 a and 2 b and the thickness W of the non-magnetic plate 1 is expressed as W >W a +W b , and this relationship is related to the scanning method during recording and reproduction. That is, as shown in FIG. 3, a pair of rotating magnetic heads of the same shape are mounted opposite to each other on a rotating disk. First, one of the rotating magnetic heads scans tracks 1a and 1b to record a first video signal. , then the other rotating magnetic head moves to track 1b.
A second video signal is recorded by scanning tracks a and b while holding the head between them, and then one of the rotating magnetic heads again holds track b and scans track a.
and b to record a third video signal;
Subsequently, the other rotating magnetic head again sandwiches track b and scans tracks a and b to record a fourth video signal. That is, a pair of head gaps of the rotating magnetic head form a magnetic track by sandwiching a magnetic track formed by a different pair of head gaps of the preceding and following magnetic heads.
従つて本実施例の如くヘツドギヤツプ４，４の
アジマスが一になる場合は必要なガードバンド幅
を考慮してＷ＞Ｗa＋Ｗbとする必要があるが、ヘ
ツドギヤツプ４，４のアジマスを異にする場合
は、ガードバンドが不要となるためＷ＝Ｗa＋Ｗb
とすることができる。 Therefore, if the azimuths of the head gaps 4, 4 are the same as in this embodiment, it is necessary to set W>W a + W b in consideration of the necessary guard band width, but if the azimuths of the head gaps 4, 4 are different. In this case, the guard band is not required, so W = W a + W b
It can be done.
よつて本発明によれば、高抗磁性記録媒体に高
域信号を高密度で記録できその効果は大である。 Therefore, according to the present invention, high frequency signals can be recorded at high density on a high coercivity recording medium, and the effect is great.
図は何れも本発明の一実施例を示し、第１図は
回転磁気ヘツドの斜視図、第２図ａ，ｂはそれぞ
れ異なる製造工程を示す切欠斜視図、第３図は走
査順序を示す説明図をそれぞれ顕わす。
主な図番の説明、１……非磁性板、２ａ，２ｂ
……金属性磁気コア、３……コイル巻線、４，４
……ヘツドギヤツプ。
Each of the figures shows an embodiment of the present invention; FIG. 1 is a perspective view of a rotating magnetic head, FIGS. 2a and b are cutaway perspective views showing different manufacturing processes, and FIG. 3 is an explanation showing the scanning order. Reveal each figure. Explanation of main drawing numbers, 1...Nonmagnetic plate, 2a, 2b
...Metallic magnetic core, 3...Coil winding, 4,4
...Head gap.
Claims (1)
金属性磁気コアを配すると共に厚さをＷ≧Ｗa＋
Ｗbなる関係に選定して成るコアチツプに対し一
体的にコイル巻線を施した一対の同形状の第１、
第２の回転磁気ヘツドが回転デイスクに対向的に
取付けられ、前記第１の回転磁気ヘツドのヘツド
ギヤツプが磁気テープの（4n−３）番目（ｎは
整数）と（4n）番目の磁気トラツクを走査して
夫々に第１のビデオ信号を記録し、前記第２の磁
気ヘツドのヘツドギヤツプが（4n−１）番目と
（4n＋２）番目の磁気トラツクを走査して第２の
ビデオ信号を記録する磁気記録再生装置。1 Metal magnetic cores with thicknesses W a and W b are arranged on both sides of a non-magnetic plate with a thickness of W, and the thickness is set such that W≧W a +
A pair of identically shaped first coils are formed by integrally winding a coil on a core chip selected in the relationship W b .
A second rotating magnetic head is mounted opposite to the rotating disk, and the head gap of the first rotating magnetic head scans the (4n-3)th (n is an integer) and (4n)th magnetic tracks of the magnetic tape. magnetic recording, in which the head gap of the second magnetic head scans the (4n-1)th and (4n+2)th magnetic tracks to record the second video signal; playback device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1604578A JPS54108611A (en) | 1978-02-13 | 1978-02-13 | Rotary magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1604578A JPS54108611A (en) | 1978-02-13 | 1978-02-13 | Rotary magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54108611A JPS54108611A (en) | 1979-08-25 |
| JPS6227442B2 true JPS6227442B2 (en) | 1987-06-15 |
Family
ID=11905591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1604578A Granted JPS54108611A (en) | 1978-02-13 | 1978-02-13 | Rotary magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54108611A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296430A (en) * | 1979-10-12 | 1981-10-20 | Rca Corporation | Magnetic recording with reduced cross-talk and interchannel time displacement |
| JPS5887122U (en) * | 1981-12-09 | 1983-06-13 | ソニー株式会社 | magnetic recording and reproducing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4325956Y1 (en) * | 1965-01-20 | 1968-10-30 | ||
| JPS5240112A (en) * | 1975-09-25 | 1977-03-28 | Sony Corp | Recorder and reproducer of image signals |
-
1978
- 1978-02-13 JP JP1604578A patent/JPS54108611A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4325956Y1 (en) * | 1965-01-20 | 1968-10-30 | ||
| JPS5240112A (en) * | 1975-09-25 | 1977-03-28 | Sony Corp | Recorder and reproducer of image signals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54108611A (en) | 1979-08-25 |
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