JPS5958612A - Multi-element thin film magnetic head - Google Patents

Abstract

PURPOSE:To facilitate attaching a winding and reduce the crosstalk and improve the tape touch, by combining elements, in each of which a slide face is formed into the shape of L by a notch part and a head gap is formed in a projecting part of this slide face, into one body. CONSTITUTION:A core material 1 is interposed between nonmagnetic materials 21 and 22 on both sides, an the slide face is formed into the shape of L by a notch part 7, and a head gap 3 is formed in the projecting part. With respect to the head gap 3, a C core 81 having the L-shaped slide face and an I core 82 having a square slide face are bonded with a glass through a gap regulating material such as an SiO2 to form the head gap 3. The C core 81 provided with a winding groove 6, and winding part 4 is provided around this winding groove 6 and the side face. Head elements 5 and 5' are combined into one body to attain a multi-element thin film magnetic head. Thus, the winding is attached easily, and the crosstalk is reduced, and the head touch is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-element thin film magnetic head suitable for a magnetic recording/reproducing device that simultaneously scans a plurality of information tracks.

Conventionally, when magnetically recording and reproducing color television signals, a magnetic recording and reproducing technique is known in which a luminance signal and a carrier color signal are recorded on separate tracks. In such conventional technology, a magnetic head for recording and reproducing a luminance signal and a magnetic head for recording and reproducing a carrier color signal are provided, and the luminance signal and the carrier color signal are simultaneously recorded and reproduced by each magnetic head. ing.

Also, as mentioned above, instead of using two magnetic heads, magnetic heads are placed on each of two or more information tracks, and by selecting these magnetic nodes, recording/reproducing scanning of an arbitrary information track can be performed. Techniques for doing so are also known.

As described above, when arranging magnetic heads on Mj number of percussion tracks, generally one magnetic head is used as a head confection instead of arranging each magnetic head separately. A multi-element magnetic head with integrated elements is used.

By the way, thin-film magnetic heads whose core material is a soft magnetic metal thin film such as sendust, permalloy, or amorphous have no core saturation compared to conventional ferrite heads, and have excellent recording characteristics. Since the core material has a structure in which the core material is sandwiched between non-magnetic materials, there is no need to magnetically insulate the head elements when arranging the head elements in the thickness direction of the core, which is advantageous.

Figure 1 (α) shows a conventionally proposed multi-element thin film magnetic head using a thin film magnetic head as a head element.
Shown in (”).

FIG. 1(a), +A) is a plan view of a multi-element thin film magnetic head consisting of two head elements, viewed from the sliding surface side, and 1 and 1' are core materials 1'' made of magnetic metal thin films.
+22+"'Iυ is a non-magnetic material, 5.3' is a head gap, 4.4' is a winding portion, and 5.5' is a head element.

The multi-element thin film magnetic head shown in FIG. 1 (α) consists of a core material 1
is sandwiched between non-magnetic materials 21 and 22, and the head gap 3 is formed in the thickness direction of the core material 1. 2'l, 2
A head element 5' which is sandwiched between parts '2', a head gap 3' is formed in the thickness direction of the core material 1', and a first winding part 4' is applied.
are integrated with a distance d between tracks (not shown), and head gaps 3, 3' are arranged on a straight line in the width direction of the trunk. In such a multi-element thin film magnetic head, if the track spacing d is sufficiently large, there is no particular problem; however, when the track spacing d has to be narrower than 0.1 cylinder due to high-density recording requirements, the winding Since the portion 4.4' protrudes from the side surface of the head elements 5, 5', it is very difficult to narrow the gap between the head elements 5, 5' as described above, and the workability is extremely reduced. Moreover, if the permissible space is narrower, the required number of turns cannot be obtained. ~Furthermore, head elements 5, 5' and winding parts 4, 4
′ inevitably come close to each other, and a leakage magnetic field is generated from the other head element to one winding part, and the head element 5
．． Another drawback was that there was large magnetic interference (crosstalk) between the 5′.

The multi-element thin-film magnetic head shown in FIG. 1 fb) has improved the above-mentioned drawbacks, and the sliding surface shapes of the head elements 5 and 5' are respectively adjusted to the head gap 5. Regarding the head gap 6.3', the winding portion 4.4' is opposite in the longitudinal direction of the track (not shown) ((I
The distance between the winding portions 4, 4' is increased by arranging the windings 4, 4 at the angle I, and at the same time, the opposing area of the head elements 5, 5' is reduced to reduce crosstalk. However, in such a multi-element thin film magnetic head, the head gap is 6.5.
A jig is required to align the position of ``, and there is a defect ``g'' on the sliding surface, so the shape is not rectangular due to the asymmetry with respect to the axis A-A' in the tractor direction.

This had the disadvantage that the tape touch became unstable.

The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art.

It is an object of the present invention to provide a multi-element thin film magnetic head in which winding can be easily performed, crosstalk is reduced, and tape touch is good.

In order to achieve this object, one aspect of the present invention is that the sliding surface of the head element is formed into an L-shape by forming a protrusion having a head gap by a notch, and each of the head elements is arranged in a row-by-row manner. mutually disposing the protrusion in the notch,
It is characterized by being integrated so that the shape of the entire sliding surface is symmetrical with respect to the axis in the track direction.

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

FIG. 2(α) is a plan view showing an embodiment of a multi-element thin film magnetic head according to the present invention, FIG. 2(A) is a perspective view showing the head element of FIG. 2(α), and 6 is a winding. The groove 7 is a notch, and portions corresponding to F'Z) and tb) in FIG. 1 are given the same reference numerals.

In this embodiment, a case will be explained in which there are two head elements.

In FIG. 2(b), a core material 1 made of a magnetic material such as Henol, Sendust, Permalloy, or amorphous is sandwiched between non-magnetic materials 21 and 22 from both sides.
A head gear 3 is formed in the thickness direction of a core material 1, and a winding portion 4 is provided. The shape of the sliding surface of this head element is such that a part of the side is cut away from the sliding surface (the upper surface in the figure) to the opposite side (the lower surface in the figure) that is perpendicularly opposed to the sliding surface. 7, and for this purpose it has an L-shape. A head gap 3 is formed in the protrusion of the L-shaped sliding surface formed by the notch 7.

Head gap 5, sliding surface shape L-shaped C: 7A 8
I and the sliding surface shape are square 1. :l782 and S!
It is formed by glass bonding through a gear shaft material such as 02. The C core 8I is provided with a winding groove 6 parallel to the sliding surface.

The winding portion 4 is formed over the winding groove 6 and the side surface. Depth from I core 82 to C゛core 81 direction of notch 7 - AL
is twice the length t of the I core 82, and the winding groove 6
The bottom surface 61 is deeper than the bottom surface 71 of the notch 7.

The multi-element thin film magnetic head shown in FIG. 2(α) is a combination of such head elements 5, 5'.

In such a multi-element thin film magnetic head, the protrusion of the head element 5 is formed by a notch (shown in FIG. 2(b)) of the head element 5'.
However, the protruding part of the head element 5' is fitted into the notch of the head element 5 to an appropriate size, and the side surface of the non-magnetic material 22 of the protruding part of the head element 5 and the head element 5' are fitted into the notch part 7). The side surfaces of the non-magnetic material 22' of the protrusion face each other, and the tip surface of the protrusion of the head element 5 and the bottom surface of the notch of the head element 5' (
The bottom surface 71) shown in FIG. 2(A) faces each other, and the tip surface of the protrusion of the head element 5' and the bottom surface of the notch of the head element 5 face each other, and these opposing surfaces are used as bonding surfaces. The head element 5.5' is integrated by injecting and curing resin.

In such a multi-element thin film magnetic head, each head element 5
, 5' and the positional relationship of the head gaps 3, 5' are determined by the notch 7 (
2 (7!1)), and as mentioned above, the depth L of the notch 7 is 2 of the length t of one core 82.
Since the headgear knobs 5 and 3' are set to double, the headgear knobs 5 and 3' are arranged on a straight line in the width direction of the track (not shown). Furthermore, since the first winding groove 77' is deeper than the bottom surface of the notch (FIG. 2(b)), as a result of integrating the head cords 5 and 5' as described above, the winding grooves 7 and 7' are The remaining υ portions of the first winding grooves 7, 7' are covered by the protrusions disposed in the notches, but the remaining υ parts of the head elements 5, 5' are C' shown in FIG. 2(b). The core 81) is penetrated to provide space for the winding, so that the winding portion 4.4' can be placed in this space.

In this embodiment, as shown in FIG. Since it is integrated so as to be placed in the notch, it is possible to easily set the track spacing of each head element and the head gap, and the depth of the head is the same as that of the notch. You will get it. In addition, in such a multi-element thin film magnetic head, there is no asymmetrical element due to the missing #jJ9B on each sliding surface, and the shape of the sliding surface forms a rectangle, so that it is aligned with the axis A-A in FIG. 1(h). axis e in the track direction like '
The tape touch is also good because ζ and C are against water. Furthermore, since the opposing area of each quad element can be significantly reduced and the windings can also be isolated from each other, crosstalk can be significantly reduced.

51, 52, 50, 60, 60, 90, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 51, 52, 51, 51, 51, 52, 55, 55, 52, 51, 52, 10, 10, 11, 11, 11 1111111111 111, 11 and 11 11 11 111 and1011 respectively showing one one of the other embodiments of the multi-element thin-film magnetic heads according to the invention are shown in FIGS. ....

51', 52', ---ke head cord, 9. T.O.
is one joint surface.

11' is a henodo confectionery norotsuno, 126 a cutting part for the winding, tq+, (Al&p) Corresponding parts are given the same reference numerals.

This embodiment is a case where there are five or more head elements.

1\tsuto° Motoko Leopard, 52.・・・・・・ 51L,
521. ... has the configuration shown in FIG. 2IA, and the head cords 51, 52 . ... are arranged in the width direction of the track (not shown) to form a head 5) = child hook 11, and the heads 51', 52r...
are arranged in parallel with the head confectionery block 11 to form a head cord block 11', and the head confectionery block +
The protrusions extending across the head caps 6 of the respective head cords + and +1' are fitted into the notches 1) (notches 7 in Fig. 2(b)) between the protrusions. In each head, comb-shaped head element blocks 11.11'' are arranged in a state of interlocking with each other.

Elements 51, 52.・・・・・・・・・151′15”
l...... are integrated.

Ru. In head element blocks II and I+', each.

Is the head element a bonding surface? The head element blocks N and 11' are joined together at [10]. However, in this case, for each head element.

A winding cutout 12° is provided except for the sliding surface (the top surface shown) so that the winding portion (not shown) can be threaded for each head element. A multi-element thin film magnetic head such as I.1, head element 51.52.・・・
. . . to form the head element block 11.
. . . by joining and forming the head block element 11'
, and these head element blocks II, N',
They were joined together so that the exposed parts were placed in the 1° notch.

Therefore, it is obtained, -\ Rad element 5I and spatula.

5+' as shown in Fig. 2 (α), and then use a spatula.

The head element 52 and the head element 52' are joined in the same manner.

In this way, the head elements are sequentially installed two by two as shown in Fig. 2, 1, (
The same result can be obtained by bonding as shown in α) and further arranging and bonding the bonded pairs of head elements in the track width direction.

As described above, even with this embodiment, the track spacing and head gap position can be easily set regardless of the number of head elements, and the sliding surface shape can be easily set.
It is symmetrical about the axis in the track direction, so C
, the tape touch is good, and the winding portions of each head element are spaced apart from each other to sufficiently reduce crosstalk.

As explained above, according to the present invention, even if the track spacing is sufficiently narrow, it is possible to easily wind each bed element, and also to reduce crosstalk between each head element. Furthermore, each trunk spacing and the position of the head gap can be easily set at a high height, and the tape touch is also good. It is possible to provide a multi-element thin film magnetic head with advanced functions.

[Brief explanation of drawings]

Figures 1 (α) and (h) are top views showing a conventional example of a multi-element thin film magnetic head, and Figure 2 (α) is a front view showing an embodiment of a multi-element thin film magnetic head according to the present invention. Figure 2 (A
) is a perspective view showing the head element of FIG. 2(α). FIG. 5 is a perspective view showing another embodiment of the multi-element thin film magnetic head according to the present invention. 1.1...Magnetic film. 21.22.21', 22'...Nonmagnetic material, 5.5'...Head gap. 4.4'... Winding part, 5.5', 51, 52.51', bP...- Throat element, 6.6'... Winding groove, 7... Notch part, 9.10...Joint surface, N, i+'...Head element block. 12... Notch for winding. , tI mouth (0-n (
g) Second mouth

Claims (1)

[Claims] In a multi-element thin film magnetic bed in which a plurality of head elements υ0 are arranged in the track width direction at predetermined intervals, the head gaps of the head elements are arranged at predetermined intervals in the track width direction.
, a protrusion having a side gap is formed in each notch, so that the sliding surface has an L-shape, and the pair of electrodes is integrated by disposing the protrusion in the notch, and the entire sliding surface is formed. A multi-element thin film magnetic head characterized in that its shape is symmetrical with respect to an axis in the track direction.