JPS6050710A - Magnetic head - Google Patents

Abstract

PURPOSE:To set the optimum gap length for a recording head and a reproducing head respectively and to improve the characteristics of a magnetic head, by forming a cut area to the gap surface with the width equal to the value obtained by subtracting the width of the 2nd spacer from the 1st spacer width and putting a single side of the 1st spacer into the cut area. CONSTITUTION:A spacer inserting cut area 8 having width (c) equal to the value obtained by subtracting the optimum gap length (a) of a reproducing head core from the optimum gap length (b) of a recording head core is formed on a gap surface 7 corresponding to each of recording heads W1 and W2. In this example, the area 8 is provided to divided blocks 1-1 and 2-2 respectively. It is possible to set each gap length at a proper value by providing the area 8. Furthermore the core blocks can be arrayed accurately with no shift of the gap position in overall view of a magnetic head.

Description

[Detailed description of the invention] [Technical field of invention] This invention is magnetic day! The present invention relates to a magnetic head of a storage device.

[Technical background of the invention and its problems]

In general, magnetic tape storage devices in which the magnetic tape travels in a single direction during recording and playback are of a type that records and plays back on the same track (the so-called read-while-recording method). In some cases, the gap length of the core of the write head is made relatively larger than the gap length of the core of the read head. This is to improve the recording efficiency of the recording head and the resolution of the reproducing head.

However, in a serpentine magnetic head, a recording core and a recording core are installed in the same head in order to perform playback during recording on the forward running FVID (FORVI/ARD) and playback during recording on another track during reverse running REV (REVERSE). This resulted in a structure in which a reproduction core and a reproducing core coexisted, and both cores had to be uniformly made to have the same gap length. Here, structural examples of conventional general serpentine magnetic heads are shown in FIGS. 1 to 3.

Figure m1 shows a two-track magnetic head. In this magnetic head, the two left and right blocks 1 and 2 are shield plates 3
The recording head core W is integrated into the left block 1 via
The right block 2 is provided with a RadCore R2 for reproduction and a RadCore W1 for recording. Then, when the magnetic chip is traveling in the forward direction FWD, recording is performed by the RAD core W process, and then reproduction is performed by the RAD core R process. Furthermore, during retrotactic REV, the data is recorded by the rad core W2, and then reproduced by the reproducing head core R2. In this way, when the recording RAD core and the reproducing RAD core coexist in the same block, the interval of 1 gap 4 (that is, the gap length) has to be the same, and the performance is forced to deteriorate to some extent. This was the conventional problem.

This situation is the same in the case of 4 tracks shown in FIG. 2, the case of 7 tracks shown in FIG. 3, or the case of other large numbers of tracks. Therefore, the same reference numerals are given to each part and the explanation thereof will be omitted.

[Purpose of the invention]

Therefore, an object of the present invention is to provide a magnetic head with improved characteristics by setting the optimum gap length for each of the recording head and the reproducing head. The magnetic head according to the present invention includes:
In a magnetic head that sequentially switches the running direction of a magnetic tape between forward and reverse for recording and reproduction, a first spacer corresponding to the optimum gap length of the recording core arranged on each track is interposed in the gap portion of the recording head core. , and a second spacer corresponding to the optimum gap length of the regenerated RAD core is interposed in the vacuum part of the regenerated RAD core,
A feature is that a notch is provided in the gap surface of the recording rad core into which one side of the first spacer is inserted, the width being the width of the first spacer minus the width of the second spacer. has.

[Embodiments of the invention]

Embodiments of the magnetic head according to the present invention will be described below with reference to the drawings.

FIGS. 4 and 5 show an embodiment of the magnetic head according to the present invention. FIG. 4 shows the assembled state, and the left and right blocks 1.2 are integrated by the shield plate 3, which is the same as in FIGS. 1 to 3. As shown in FIG. 4, a spacer 6 corresponding to the optimum gap length is interposed in each of the recording head cores W and W, and a spacer 6 corresponding to the optimum gap length a is interposed in each of the recording head cores R and R2. A corresponding spacer 5 is interposed.

FIG. 5 is an exploded view showing each block 1.2 further divided. The gap surface 7 corresponding to each recording head core W has a width c (= b -
The spacer insertion notch 8 shown in a) is formed. Fifth
In the case of the figure, the notch 8 is provided in each divided block 1-□, 2-2, but as shown in FIG.
．． ．． 2-4, or, as shown in FIG. 7, 2-C may be formed on the gap surfaces facing each other.

By providing the spacer insertion notch 8 in this way, the length of each gap can be determined appropriately, and furthermore, even when considering the entire magnetic head, the gaps can be arranged accurately without causing any misalignment. Can be done. Although the above embodiment has been described with respect to a two-track magnetic head, it goes without saying that it is also applicable to a magnetic head with two or more tracks.

[Effects of the Invention] As described above, according to the present invention, the gap lengths of the recording head and the reproducing head can be set to sizes suitable for each, and the gap length is not uniform as in the past. , it will greatly contribute to improving the characteristics of a magnetic head.

[Brief explanation of drawings]

Fig. 1 is a front view showing the structure of a conventional 2-track head using the recording/reproducing method; Fig. 2 is a front view showing the structure of a 4-track head; Fig. 3 is a front view showing the structure of a 7-track head; 5 is an exploded view of the magnetic head according to the present invention; FIG. 6 is an exploded view of another embodiment; and FIG. 7 is an exploded view of another embodiment. It is a diagram. ■...Left block, 2...Right block, 3...Shield plate 1 4...Gap, 5...Rad core gap spacer for recording, 6...
・Spacer for the gap of the playback head core, 7-...Gap surface, 8...Notch for inserting the spacer, W work, W2...Rad core for recording, R work + R2...Rad core shaft a for playback.・Optimal gap length of the rad core for reproduction, b...optimum gap length of the rad core for recording, C...width of the notch. Applicant's agent Kiyoshi Inomata Figure 4

Claims (1)

[Scope of Claims] A magnetic head for recording and reproducing information on different tracks of a magnetic tape having at least two or more tracks when the magnetic tape is running in a forward running direction and a reverse running direction, In a magnetic head in which a recording RAD core corresponding to a track and a reproducing head core are arranged in a straight line along the normal running direction of the magnetic tape, a recording RAD core corresponding to each track has a width corresponding to the optimum gap length of the RAD core. A first spacer is interposed in the gap portion of the recording head core, and a second spacer having a width corresponding to the optimum gap length of the reproducing RAD core is interposed in the gap portion of the reproducing RAD core. A magnetic head characterized in that a gap surface of a rad core is provided with a notch into which one side of the first spacer is inserted, the width being the width of the first spacer minus the width of the second spacer.