KR920001151B1 - Magnetic recordings head - Google Patents

Magnetic recordings head Download PDF

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KR920001151B1
KR920001151B1 KR1019880008748A KR880008748A KR920001151B1 KR 920001151 B1 KR920001151 B1 KR 920001151B1 KR 1019880008748 A KR1019880008748 A KR 1019880008748A KR 880008748 A KR880008748 A KR 880008748A KR 920001151 B1 KR920001151 B1 KR 920001151B1
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South Korea
Prior art keywords
recording
magnetic
head
gap
spacer
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KR1019880008748A
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Korean (ko)
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KR890002818A (en
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스우 안도오
이찌단 노구찌
디이. 하이트 토마스.
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산요덴끼 가부시끼가이샤
이우에 사또시
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/187Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/23Gap features

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

내용 없음.No content.

Description

자기기록 재생용 헤드Head for magnetic recording reproduction

제1도는 본 발명의 자기기록 재생용 헤드의 요부사시도.1 is a main perspective view of the magnetic recording reproduction head of the present invention.

제2도는 본 발명의 특성도.2 is a characteristic diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

1 : 자기헤드 2,3 : 선단부1: magnetic head 2,3: distal end

4 : 간극부 5 : 스페이서4: gap part 5: spacer

6 : 코어 7 : 권선6: core 7: winding

본 발명은 일반적인 오디오용 컴팩트 카세트를 사용하여, 자기테이프위에 비데오신호를 기록, 재생하는 자기기록 재생용 헤드에 관한 것이다.The present invention relates to a magnetic recording reproduction head for recording and reproducing a video signal on a magnetic tape by using a general compact audio cassette.

일반적으로 오디오용 녹음, 재생에 많이 사용되고 있는 컴팩트 카세트로 호칭되는 자기테이프를 기록매체로서 기록, 재생할 경우, 내부에 설치된 자기테이프의 도포막재료에 따라서 컴팩트 카세트는 노오말, 크롬, 메탈형의 3종류가 시판되고 있으며, 하이파이기록, 재생에 대하여 사용자가 어느 것이든 선택하여 기록, 재생을 하고 있다.In general, when recording and reproducing a magnetic tape, which is called a compact cassette, which is commonly used for audio recording and playback, as a recording medium, the compact cassette may be a normal, chrome or metal type 3 depending on the coating material of the magnetic tape installed therein. Types are commercially available, and a user selects any of them for recording and playback for Hi-Fi recording and playback.

이것에 대하여서는 기록, 재생용 자기헤드는 현지 페라이트 코어를 사용하고 있는 바, 주파수 특성을 향상시키기 위하여, 전면부 갭(gap)폭을 고려하여서 설계된다.On the other hand, since the magnetic head for recording and reproducing uses a local ferrite core, it is designed in consideration of the front gap width in order to improve the frequency characteristic.

그 일예로서 일본국 “라디오 기술사”가 발행한「하이파이 테이프 레코오더」의 122페이지에 기재된 바와 같이 오디오용 헤드 전면부 갭폭에 대한 상대레벨이 충분하도록 설정하는 기술이 제안되어 있다.As an example, as described on page 122 of "Hi-Fi Tape Recorder" issued by "Radio Technology Co., Ltd." in Japan, a technique is proposed in which the relative level with respect to the gap width of the front face of the audio head is sufficient.

종래에는 상술한 바와 간이 전면부 갭폭을 원하는 주파수 특성에 설정하는 기술은 나타나 있으나, 상기한 오디오용 컴팩트 카세트를 사용하여, 그것에 비데오 신호를 기록하고자 하는 경우에 컴팩트 카세트용인 오디오용 헤드로 행하고자 하면 소정출력을 얻을 수 없었다.Conventionally, there has been shown a technique for setting the simple front gap width to the desired frequency characteristic as described above. However, if the audio compact cassette is to be used to record a video signal thereto, the audio head for compact cassette is used. A predetermined output could not be obtained.

즉, 통상적인 오디오용 컴팩트 카세트에 사용되는 자기헤드는 전면부 갭(gap)이 1.4μ(미크론), 갭깊이가 250μ로는 테이프속도 38Cm/sec로 주파수 대역 250KHZ는 커버할 수 없는 문제점이 있었다.That is, the magnetic head used in the conventional compact audio cassette has a problem in that the front gap is 1.4 mu (micron) and the gap depth is 250 mu and the tape speed of 38 cm / sec cannot cover the 250 KHZ frequency band.

상기한 문제점을 해소하기 위하여, 본 발명은 동일한 오디오용 헤드를 사용할 수 있도록 개선하는 것을 목적으로 한다.In order to solve the above problems, an object of the present invention is to improve the use of the same audio head.

상기한 목적을 달성하기 위해서, 본 발명은 자기녹음용 컴팩트 카세트에 비데오 신호를 기록 및 재생하기 위한 자기기록 재생용 자기헤드에 있어서, 0.8μ이하의 스페이서를 가지며, 또한 180μ이하의 갭깊이로 하고, 기록시의 기록전류를 소정치로 설정하여 자기헤드의 자기포화에 의하여 실효갭을 넓히고, 상기한 자기테이프로의 기록레벨을 올려, 재생시 상기한 스페이서에 의하여 정해지는 갭에 의하여 고주파 특성을 개선하는 구성이다.In order to achieve the above object, the present invention provides a magnetic recording and reproducing magnetic head for recording and reproducing a video signal in a magnetic recording compact cassette, having a spacer of 0.8 mu or less, and a gap depth of 180 mu or less. By setting the recording current at the time of recording to a predetermined value, the effective gap is widened by the magnetic saturation of the magnetic head, the recording level of the magnetic tape is raised, and the high frequency characteristics are determined by the gap determined by the spacer at the time of reproduction. It is the structure to improve.

이와같이 구성된 본 발명은 컴팩트 카세트를 사용하여, 통상적인 속도의 수배로 자기테이프를 주행시켜서 비데오신호를 기록할 때에 상기한 본 발명의 구성에 의하여 고주파 특성을 개선할 수 있도록한 것으로서 이를 첨부도면에 의하여 상세히 설명하면 다음과 같다.The present invention configured as described above is capable of improving high frequency characteristics according to the above-described configuration of the present invention when recording a video signal by driving a magnetic tape at several times the normal speed using a compact cassette. It will be described in detail as follows.

제1도는 본 발명의 자기기록 재생용 헤드의 요부사시도, 제2도는 자기기록 재생용 헤드의 특성도로서, (1)은 자기헤드로 선단부(2)(3)을 가지며, 그 간극부(4)에는 스페이서(유리 수지등)(5)를 설치하고 있으며, 일예로써 퍼멀로이(permalloy)로 형성한 코어(6)에는 권선(7)을 두루 감았다. 다음에 상술한 실시예에 있어서, 실용레벨의 기록, 재생, 시간 및 기구부를 고려하여, 크롬테이프를 사용하여 테이프 속도를 38Cm/sec(통상적이 오디오 컴팩트 카세트의 속도의 약8배 속도), 비데오 신호의 대역 250KHz내지 300KHz로 하여, 주파수 변조(FM)로 기록한다. 이 경우 자기헤드(1)의 전면부 갭값(l), 갭길이(d), 코어두께(t), 권선(7)의 인덕턴스(L)를 다음의 값으로 설정한다.1 is a main perspective view of the magnetic recording and reproduction head of the present invention, and FIG. 2 is a characteristic diagram of the magnetic recording and reproduction head, wherein (1) has a tip portion (2) and (3) as a magnetic head, and the gap portion (4). ), A spacer (glass resin, etc.) 5 is provided, and as an example, a winding 7 is wound around the core 6 formed of a permalloy. Next, in the above-described embodiment, the tape speed is 38 Cm / sec (typically about 8 times the speed of the audio compact cassette) and video using chrome tape, taking into account the practical level of recording, reproduction, time, and mechanism. The signal is recorded in frequency modulation (FM) with a band of 250 KHz to 300 KHz. In this case, the front gap value l of the magnetic head 1, the gap length d, the core thickness t, and the inductance L of the winding 7 are set to the following values.

l=0.8μ, d=180μl = 0.8μ, d = 180μ

t=0.6mm, L=3mHt = 0.6mm, L = 3mH

상기한 구조에 있어서, 기록전류(IR)와 재생시 출력레벨과의 관계는, 제2도에 나타낸 바와 같이 된다.In the above structure, the relationship between the recording current I R and the output level during reproduction is as shown in FIG.

먼저, 상기한 구조에서, 간극부(4)의 중심위치(LA)에 있어서의 자계분포는 제2a도에 나타낸 바와같이, (LA)를 중심으로 소정폭으로 대략 일정치로 커지게 된다.First, in the above-described structure, the magnetic field distribution at the center position L A of the gap portion 4 becomes large at a constant value with a predetermined width about (L A ) as shown in FIG. 2A. .

다음에 기록전류(IR)에 대하여 재생시의 출력레벨을 측정하면, 제2b도에 나타낸 바와 같이 IR=6mA로부터 출력레벨을 증가하여, IR=7mA에서 최대로 되어, 서서히 감소한다.Next, when the output level at the time of reproduction is measured with respect to the recording current I R , as shown in FIG. 2B, the output level is increased from I R = 6 mA, becomes maximum at I R = 7 mA, and gradually decreases.

여기서 IR=8mA(피이크,피이치)의 전류로 상기한 코어(6)선단부는 포화하여, 누설자속을 증대시킬 수 있다.Here, the tip of the core 6 is saturated with a current of I R = 8 mA (peak, pitch), so that the leakage magnetic flux can be increased.

이것은 상기한 자계분포를 나타내는 제2a도의 변화율이 큰 점에서 갭선단이 들어맞게할 필요가 있으며, 이점이 급하게 높을수록 고주파신호의 기록에 적합하므로, 상기한 갭선단은 소정치로 설정하여 설계하고, 또한 상기한 스페이서(5)에 마주보는 코어(6)의 선단 가장자리를 테이퍼지게 하였다.It is necessary to fit the gap tip at the point where the rate of change of FIG. 2a representing the above magnetic field distribution is large, and the higher the urge, the better the recording of the high frequency signal. Therefore, the gap tip is designed to be set to a predetermined value. In addition, the tip edge of the core 6 facing the spacer 5 was tapered.

이와같이 된 본 발명은 일반적인 오디오용 컴팩트 카세트를 사용하여, 통상적인 오디오카세트 기구에 의하여 고정헤드로 비디오 신호를 기록할 경우, 일예로서 퍼멀로이를 코어재료로서 사용한때에, 단순한 구조변경이 개량으로, 종래에 서는 주파수 대역을 커버할 수 없던 것에 대하여 실용적으로 제공하는 특성을 얻을 수 있으며, 대단히 저렴한 일체형 비데오기록 재생장치를 구성할 수 있다.The present invention thus achieved by using a general audio compact cassette, when recording a video signal with a fixed head by a conventional audio cassette mechanism, when a permalloy is used as a core material as an example, a simple structural change is improved, conventionally In this case, it is possible to obtain characteristics that can be practically provided for those which cannot cover the frequency band, and to constitute an extremely low-cost integrated video recording and reproducing apparatus.

따라서, 본 발명의 자기기록 재생용 헤드는, 간편한 일체형 무비에 사용하면, 그 효과를 더욱 크게할 수 있는 것이다.Therefore, the magnetic recording reproduction head of the present invention can further increase its effect when used in a simple integrated movie.

Claims (1)

자기녹음용인 컴팩트 카세트의 자기테이프에 비데오신호를 기록 및 재생하기 위한 자기기록 재생용 헤드에 있어서, 0.8μ이하의 스페이서(5)를 가지며, 180μ이하의 갭 깊이(d)로 하되, 기록시의 기록전류(IR)를 소정치로 설정하여 자기헤드(1)의 선단부(2)(3)의 자기포화에 의하여 실효갭을 넓게하며, 상기한 자기테이프로의 기록레벨을 올려, 재생시 상기한 스페이서(5)에 의하여 결정되는 갭에 의해 고주파 특성을 개선하는 것을 특징으로 한 자기기록 재생용 헤드.A magnetic recording / reproducing head for recording and reproducing a video signal on a magnetic tape of a compact cassette for magnetic recording, having a spacer 5 of 0.8 µm or less and having a gap depth d of 180 µm or less. By setting the recording current I R to a predetermined value, the effective gap is widened by the magnetic saturation of the tip portions 2 and 3 of the magnetic head 1, and the recording level of the magnetic tape is raised to increase the recording gap. A magnetic recording reproduction head characterized by improving high frequency characteristics by a gap determined by one spacer (5).
KR1019880008748A 1987-07-23 1988-07-14 Magnetic recordings head KR920001151B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP184429 1987-07-23
JP62184429A JPS6427013A (en) 1987-07-23 1987-07-23 Head for magnetic recording and reproducing
JP?62-184429 1987-07-23

Publications (2)

Publication Number Publication Date
KR890002818A KR890002818A (en) 1989-04-11
KR920001151B1 true KR920001151B1 (en) 1992-02-06

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Application Number Title Priority Date Filing Date
KR1019880008748A KR920001151B1 (en) 1987-07-23 1988-07-14 Magnetic recordings head

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JP (1) JPS6427013A (en)
KR (1) KR920001151B1 (en)

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Publication number Publication date
KR890002818A (en) 1989-04-11
JPS6427013A (en) 1989-01-30

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