JPS58108024A - Multichannel magnetic head - Google Patents

Abstract

PURPOSE:To realize the high integration of head cores by regulating the pitch of respective head cores by the layer thickness of shield members stacked between head cores. CONSTITUTION:A shield plate 12 made of an electric shield material such as beryllium, copper, etc., is thicker than the winding thickness of coil winding parts 11a and 11b of each head core 10, and has cut holes 12a and 12b large enough for the coil winding corresponding to the winding parts 11a and 11b. Other shield plates 13 are made of magnetic shield materials such as permalloy, etc. When the shield plates 12- and 13- are laminated between head cores 10-, no influence of the coil winding thickness is exerted, so the head core pitch is regulated precisely only by controlling the thickness of the shield plates 12 and 13, thus realizing the high integration of head cores.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-channel anaerobic head that integrates a large number of herad cores and is capable of performing multi-channel recording and playback on tape.

For example, multi-channel magnetic heads, in which ring-type head cores are stacked in parallel for the required number of tracks, have been put into practical use and widely used as magnetic heads for data processing magnetic tape devices. As shown in Fig. 1, the multi-channel magnetic head has two core halves If) 11) (one core half 11) is a ring-type magnetic head separated by a coil (with a force wound around it). Head core +31... and shield plate (4)...
The head core pitch (distributed track density) is limited by the machining accuracy of the cut groove of the core holder, and the coil winding of the head core is actually difficult. It is difficult to process the part corresponding to the coil winding part, and it is not possible to sufficiently shield the coil winding part, and the recording track density on the tape by a multi-channel magnetic head with such a structure is at most 25? PI~5Q? PI (1 inch roar 25~5
0 truck). On the other hand, the lI value for improving the recording track density and miniaturizing the device in such magnetic tape devices is becoming stronger year by year, and as a result, in recent years, the multi-channel anaerobic trend of the highly integrated rad core (A recording track density) has become stronger. A great deal of effort has gone into developing the head.

This invention has been developed with the aim of providing a multi-channel magnetic head that achieves high integration of the head core by using a shielding member laminated between the head cores. An example will be described with reference to the drawings.

That is, according to the present invention, instead of regulating the head core pitch using the cut grooves of the core holder, which requires double-wheel shaping, the pitch of each head core is controlled by the layer thickness of the shield member laminated between the head cores. The head core pitch is regulated, and FIG. 2 shows the configuration for a single track, and FIG. 3 shows the case where they are integrated.

Here, G(1... is the head core, (11a)...
(11b)... is a coil winding part where a coil is wound around the head core α and -...0... is a shield plate laminated between the head core pieces... Among them, the layer thickness of the shield plate I... is made thicker than the coil winding thickness, and the part # corresponding to the coil winding part (HaJ... (11bJ...) [notch that allows the coil winding thickness] Hole (12
m)・-(12b)... are formed. In addition, the rad core (1 (1...
Shield plate laminated adjacent to side...Hape IJ IJ
The other shield plates 11i are made of a magnetic shielding material such as permalloy, or a permalloy plated with steel or laminated with steel.

Therefore, the shield plate I-0 is between the head cores.
When assembling a multi-channel/Y-channel magnetic head by laminating..., the coil windings 5 (11 holes...(IN))... of the head core... are assembled as shown in Figure 5, 1bj. Notch holes (12 holes...) in shield plate l... and shield plate -...
(12b)... Since the shield plates 1...U... can be stacked one after another while being confined in the space formed by the shield plates 1...U... without being affected by the coil winding thickness.
The pitch of each head core can be positively regulated by the layer thickness of .
・It is possible to apply sufficient shielding. Here, for example, such a coil winding part (l1m)・" (llb) -
Since the thickness t of the shield plate (2) is generally 4 microns or less, the thickness tl of the shield plate (2)... The front and rear helad core pitches can be easily achieved, and the track density is more than 100?PI (100 tracks per inch), so its practical value is great.

The head core and shield plate will be laminated one after another using adhesive, but the thickness of the adhesive can be made into scraps that hardly matter, and the actual head core pitch is the thickness of the shield plate. It is possible to precisely regulate the track density by controlling it alone, and by adding head core thickness control to this, it is possible to precisely regulate the track density.

As described above, according to the present invention, there is provided a multi-channel magnetic head that integrates a large number of herad cores and is capable of performing multi-channel recording and playback on a tape. Since the layer thickness is configured to regulate the pitch of each head core, it is easy to narrow the head core pitch, that is, increase the track density. Compared to the case where the core pitch is regulated at °C, it is possible to easily achieve higher recording track density on the tape.

In addition, according to the present invention, the number of layers of the shield member laminated between the head cores is reduced (each has a five-layer structure, of which at least two layers of the shield member laminated adjacent to the head core side are stacked between the head cores). Since a notch is formed in the part corresponding to the coil winding part to allow the coil winding thickness, the coil winding thickness does not affect the head core pitch and shielding in that part is also ensured. It has excellent effects such as being able to perform

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional multi-channel anaerobic head.
FIG. 2 is a configuration diagram of a single track of a multi-channel magnetic head according to the present invention, and FIG. 3 is a front view and a side sectional view of the multi-channel magnetic head when it is integrated. (1 (1... Head core s (11a bar 11b), No. a coil winding part, U (1m... Shield plate, (12a)
(12b) - Notch hole.

Claims (1)

[Claims] +1J A multi-channel magnetic head that integrates a large number of helad cores and is capable of performing multi-channel recording and playback on a tape, wherein the layer thickness of a shielding member stacked between the head cores is A multi-channel anaerobic head characterized by a structure that regulates the pitch of each head core. ■ The number of layers of the shield member laminated between the herad cores shall be at least three layers, of which at least 2Jlll of shield members placed between adjacent ridges on the head core side shall have a portion corresponding to the same portion of the coil winding of the herad core. A multi-channel anaerobic head according to claim 1, wherein a notch is formed to allow a coil winding thickness. (31) The number of shield members stacked between the head cores shall be at least five layers, of which W is placed on the head core side.
A multi-channel magnetic sensor according to claim 1, wherein the two-layer seal and other shielding members are made of a magnetic shielding material such as permalloy.