KR870000043B1 - Multi-track complex head - Google Patents

Abstract

A complex multi-track head forms high-density multi-trank on the tape to read/write data in parallel. The multi-track head comprises two parts; the one is stacked in the sequence of a read/write head, a magnetic shielding material, and a read/write head etc., and another is stacked in the sequence of a magnetic shielding material, a read/ write head, and a magentic shielding material etc.. The azimuth angle of the heads in each part are same but direction is different(+θ and -θ) so that each data in the track can be stered/reproduced with high density.

Description

Mutual Azimuth Loss Multiple Track Complex Head

1 is a perspective view of a multitrack head structure in which mutual orientation is lost.

2 is a sectional view from above of the head.

3 is a view of the coil portion seen from the back of the head.

4 is a front view showing an azimuth angle (± θ °) between adjacent tracks.

5 and 5 are detailed exemplary views showing the head of the prior art and the present invention applied to a tape medium.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to multiple track bobbin heads capable of recording or reproducing parallel signals of a small computer directly on a cassette tape medium, and more particularly, to a multitrack composite head utilizing mutual azimuth losses.

In the conventional acoustic magnetic cassette tape, two-track stereo was used by dividing the tape in the channel reciprocating recording method, and two recording sections were used to reduce crosstalk between adjacent tracks. Thus, in the prior art, the magnetic head is divided into a ring head and a probe head, the ring head has been used for horizontal recording and lateral recording, and the probe head has been used for vertical recording.

Here, the horizontal recording method using the ring head is the most commonly used in the magnetic memory device of the recorder, the VTR, and the computer to date. The ring head has a gap size, a physical distance between the head and the recording medium, and a recording medium. Recording and playback parameters such as the thickness (magnetic layer thickness) and the surface velocity of the recording medium, and the azimuth angle is 0 ° when the angle is perpendicular (90 °) to the advancing direction of the tape (recording medium). It was based on 0 °. (See paragraph 9-8, page 6 of JIS Standard C-6281-1975).

The "azimuth angle" is an angle formed by the gap of the ring head with respect to the direction of movement of the recording medium. When the gap is perpendicular to the tape (90 °), the azimuth angle is 0 ° (θ = 0 °). The gap of the ring head in recording can be defined as an angle (θ ° + 90 °) with respect to the advancing direction of the recording medium.

However, as described above, if the azimuth angle of the playhead is deformed to ± θ ° when the reference recording orientation angle is 0 °, a level difference between recording and reproduction occurs. Accordingly, since the azimuth angle of the playhead is equal to the azimuth angle of the reference recording head, it is obvious that the maximum play level is obtained. In this case, the loss of the play level due to the deformed angle of the playhead is called azimuth loss. That is, azimuth loss is expressed as follows.

Therefore, in the present invention, if the azimuth angle of the recording head is inclined at + θ ° and the azimuth angle of adjacent tracks is inclined at -θ °, the reproduction head is reproduced at the same angle, so that the reproduction level close to the maximum is obtained in recording and reproduction on the same track. By minimizing the effects of interference (noise) generated in adjacent tracks, it is possible to improve physical limitations (unrecorded section setting, interference between adjacent tracks) in head manufacturing in the conventional multitrack.

In addition, since there is an unrecorded section in the tape recorded by the conventional multitrack head, the playback head is reproduced by reducing the width by about 30% from the recording head due to problems such as interference and incandescent, and thus the utilization rate of the recording medium is low as 50%.

On the other hand, the present invention has the forward compatibility of eliminating interference problems and unrecorded sections between adjacent tracks by the physical azimuth loss method.

To this end, in the present invention, by installing a composite head having a multitrack ruler (meaning a head gap or later known as a jaror) of a multi-track in which the mutual azimuth angle (± θ °) of the structure shown in FIG. To eliminate the unrecorded section on the tape and to maximize the width of the tape medium, this multi-track composite head constitutes a double incandescent composite head, and the azimuth angle of each composite head is -θ °. When the azimuth angle to each composite head is ± θ ° and combined with the composite head as a single composite head, each of them is incandescently staggered so that they do not overlap each other. mm) so that it can have nine or more tracks, as described in "Recording and Reproducing Apparatus and Reproducing Method for Small Computers" filed with the same person as the present invention. Enables the recording and reproducing of high density.

Here, the azimuth angle ± θ ° of each path according to the present invention is preferably defined as 6 ° ≦ θ ≦ 9 °, because the minimum azimuth angle for forward compatibility of high density recording on the recording medium is mutually azimuth angle. Recording error of digital signal within 50% tolerance of recording width by increasing 50% of physical tolerance of recording width to loss characteristics and recording / reproducing level difference of recording / reproducing at same azimuth angle on same track. This is because the noise of can be suppressed.

Accordingly, an object of the present invention is to provide a recording / reproducing apparatus of an application filed simultaneously with the present application for use with a small computer, and to form a high density multitrack on a conventional cassette tape and record and reproduce input / output signals in parallel therefrom. Each loss scheme relates to providing a multitrack composite head. In addition, the multitrack composite head of the present invention is composed of a composite head that is arranged in a double, the composite head of one side is made of a ring of a plurality of magnetic material to form a single track of the tape, the coil of the rear end of the ring-shaped In the front end, the recording / reproducing head which has a magnetic path inclined by + θ and the magnetic shield medium of the nonmagnetic material are alternately stacked and fixed adjacent to the ring magnetic material. A magnetic recording and reproducing head having magnetic paths inclined by-[theta] at the front end and magnetic ring media adjacent to each of the ring-shaped magnetic bodies are alternately laminated and fixed, and a magnetic shield medium is formed between these two composite heads. Record and record data on tapes of multiple racks with different azimuth angles by inserting and coupling to each other in a suitable way. It consists of a structure.

Thus, the present invention can be formed in the width of the composite head having the same width as the conventional cassette tape, so that it is easy to install in the conventional cassette deck mechanism, and can be applied to the conventional cassette tape, as well as without the unrecorded section of the conventional cassette tape. Therefore, it is a composite head of high density multitrack which maximizes the utility.

The present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a multitrack composite head of the present invention, wherein the first composite head is a recording / playing head 3, ( 5), (7), and (9) in this order, and alternately stack and fix the magnetic shield medium 12 of several nonmagnetic materials one by one, and similarly, the second composite head also has a magnetic recording medium (2) and (4). ), (6) and (8) are laminated and fixed one by one with a plurality of nonmagnetic magnetic shield media 12, or a combination of these two with one magnetic shield media 12 inserted therebetween. The head can be combined to form a single composite head.

Herein, the magnetic reproduction head 9 may be referred to as a parity check recording and reproduction head, and the recording reproduction heads 1, 3, 5, 7, 7 and 9 in the first composite head are equal to -θ °. It can be seen that it has an azimuth angle of −θ ° because of having the inclined transverse portion at the front end portion, and the recording / reproducing heads 2, 4, 6, and 8 are inclined by + θ ° in the second composite head. Since it has a pendulum path, it can be seen that it has an azimuth angle of + θ °.

Therefore, the present invention inclines the mutual azimuth angle with respect to each path of each recording / playback composite head by ± θ ° from the vertical direction, resulting in azimuth loss,

Since the azimuth angle ± θ ° of each path becomes 로 6 ° ≤θ≤9 ° |, and a recording method having mutual azimuth angles is introduced on the tape medium in advance, the present invention having the same azimuth angle during reproduction is used. As will be described in detail later, the interference of adjacent tracks can be reduced, and the recording density of the recording medium can be used to the maximum.

2 is a sectional view from above of the composite head, showing the composite head recording / reproducing head, in which a coil is wound on the rear end of the recording / reproducing head, and the recording / reproducing signal is input / output by the terminal 13 which each coil has individually.

3 shows the back side of the composite head, showing the incandescent of the coils of the recording and reproduction head. 4 is a front view reliably showing mutual azimuths 16 and 17 of the composite head, the width of which is equal to the width W of a conventional cassette tape. Although not shown in the drawings of the present invention, the magnetic shield head of FIG. 1 and FIG. 4 may be finally covered with a permalloy shield case. That is, the vertical magnetic shield and the head which vertically separates both groups of the heads 1, 3, 5, 7 and 1 head 2, 4, 6, and 8 1), (3), (5), (7), and (9) can be constructed in such a way that the horizontal magnetic shield shields each head completely independently, which means that one shield method is indispensable for high density recording heads. Self shield method.

Accordingly, the present invention can be compared with the conventional multitrack reproducing method as shown in Figs. 5A and 5B. In describing this, the recording and reproducing method on the tape medium as shown in Fig. 5A is the current mini class. to be used in the magnetic device for inputting and outputting data of a large capacity (200 MB) at a high speed in one computer, the erase head (E _H) in accordance with the tape traveling direction, the recording head (W _{H1 ~ N:} N is an integer) and the read head (R _H1-N ) is incandescent in series, reducing the interference between adjacent tracks during high-speed driving of recording media (typically 901 ps: inch second), and skew (the tape medium and the magnetic head are misaligned and the azimuth is misaligned). Unrecorded section (W ₁ ) had to be set, and the recording section width (W ₂ ) and playback section width (W ₃ ) had almost the same structural problem.

According to the present invention, as shown in FIG. 5B, in the state where the erasing head E _H , the recording head W _H , and the reproducing head R _H are provided along the moving direction of the tape medium, the speed control track CT is provided. Since one pulse per data is recorded in response to the speed change ratio of the motor and the speed change of the recording medium at the time of recording, data can be reproduced based on this pulse during playback. It can be input and output, and it is not influenced by the change of tape speed, so it is not a problem even if the precision of the mechanical device is frequent even if it is applied to the memory device of the start / stop type of the magnetic tape mechanism. Since the data itself has an azimuth angle on the medium, when the recording medium coincides with the azimuth angle of each of the magnetic recording and reproduction heads of the present invention, a skew phenomenon occurs even when the recording medium runs at high speed. It is hardly influenced by, and in particular, since there is no unrecorded structure, the physical space of the recording medium can be maximized to enable high density recording and reproduction.

Therefore, the present invention is installed in the recording and reproducing apparatus of the application filed together with the present application for use with a small computer, thereby forming a high density multitrack on a conventional cassette tape, and recording and reproducing I / O signals in parallel therefrom.

Claims (1)

In a multitrack head using mutual azimuth angles, two composite heads are arranged in a double arrangement, and one non-magnetic magnetic shield is sequentially stacked on the composite head on one side with recording and reproducing heads having a coil on the magnetic back surface. And the other composite heads are alternately stacked in order from the top of the magnetic shield and the recording / reproducing head from above, and at the same time, the magnetic shield medium is inserted between the two composite heads so that the recording / reproducing heads of each composite head are combined. The mutual azimuth loss type multi-track composite head, which is arranged in a staggered manner and forms their mutual azimuth angles at a predetermined angle in the vertical direction, so that data on a pre-recorded recording medium can be reproduced with high density at the time of recording and reproduction.

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