JPS6035308A - Magnetic head and its production - Google Patents

Abstract

PURPOSE:To improve remarkably productivity by fitting shee-shaped magnetic materials constituting magnetic circuits into the respective positioning grooves of an array member having the positioning grooves at prescribed intervals, packing the entire part or a part thereof with a non-magnetic material to constitute a block-shaped body and incorporating the working stage similar to the working stage for a block-shaped magnetic material. CONSTITUTION:The outside shape of a block-shaped body 22 is worked to a prescribed sectional shape corresponding to the shape of a magnetic circuit member and is sliced at prescribed intervals so as to have a sheet of a sheet-shaped magnetic material 11, by which magnetic circuit members 10A, 10B having a required shape are simultaneously manfactured in plurality. The materials 11 having a prescribed thickness are embedded and fixed to an array member 12 worked to a comb tooth shape and the entire part or a part thereof is packed with a packing material to serve as a non-magnetic material 13 to manufacture the block-shaped body 22. The members 10A, 10B are obtd. by working such body and therefore the simultaneous manufacture of the many magnetic circuit members is made possible, by which the production efficiency is remarkably improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head suitable for a VTR recording head having a small track width, and a method for manufacturing the same.

Conventionally, in the case of block-shaped magnetic material 1 as shown in FIG. 1(A), the cross-sectional shape of the block-shaped magnetic material 1 is set to a predetermined shape as shown in FIG. 1(B), and ) A common method is to obtain a plurality of cores 2 at the same time by slicing. However, if the magnetic material cannot be shaped into a block, or if the magnetic properties are better when it is originally in the form of a sheet (thin plate), then the method of slicing the block shown in FIG. 1 cannot be used.

On the other hand, when a sheet-like (thin plate-like) magnetic abrasive material 3 as shown in FIG. For the purpose of improving dynamic characteristics, Figure 2 (B)
The work is carried out in a state where it is laminated with other non-magnetic material 4 as shown in FIG.

In this case, it is difficult to process a plurality of magnetic circuit parts at the same time because the magnetic circuit parts A.5 having the same shape as shown in FIG. 2(C) are made from a plane by cutting or the like. If the sheet-like magnetic material 3 and the non-magnetic material 4 are chemically the same, a method such as chemical corrosion can be used, but generally this is not the case in many cases. In particular, if the non-magnetic material 4 of the pond here is a non-magnetic material such as glass or ceramic, or a plastic compound, this method cannot be used and is almost impossible.
It will depend on geometric processing. However, mechanical weight] −
In the case of , the method of punching out has no choice but to cut it out with the lower grain J ability. Moreover, if one magnetic circuit member 5 is relatively large, it is possible to obtain a high viscosity by increasing the processing steps accordingly.As the process becomes more and more complicated, the production rate decreases markedly. do.

The present invention solves these problems and enables the same processing steps as those for block-shaped magnetic particles to be adopted even though sheet-shaped magnetic materials are used, thereby significantly improving productivity.
The present invention aims to provide a magnetic head that achieves the second objective and a method for manufacturing the same.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of a magnetic head and a method for manufacturing the same according to the present invention will be described below with reference to the drawings.

FIG. 3 shows an embodiment of the magnetic head, in which the magnetic circuit portion 10A, IOB is positioned to fit the sheet-like magnetic material 11 constituting the magnetic circuit and the sheet-like magnetic material 11'. It is composed of an array member 12 having a groove, and a non-magnetic material 113 provided on both sides of the sheet-shaped magnetic material 11 and integrated into the sheet-shaped magnetic material 1 and the array member 12. And these magnetic circuit parts benefits 10
A.

A gap G is formed by providing a gap G on the abutting surface on the moving side of the tape 1-1 of 10B, and the required winding 111 is provided.

Magnetic circuit MV=4', 4' 30 A, 1 (113
[Manufacture] - The process is shown in Figs. 4 to 9. First, prepare a square bar 20 made of glass, ceramic, metal, plastic compound, etc. as shown in Fig. 4, and form positioning grooves 21 with a width of 100 mm at regular intervals as shown in Fig. 5. The arrangement member 12 is formed into a comb blade shape.

Then, as shown in FIG. 6, the sheet-like magnetic material 11 of a predetermined thickness is implanted and fixed in each positioning groove 21 of the array member 12, and further, as shown in FIG. Filled with true material, a block-like body 22 is created.

Here, as the sheet-like magnetic material 11, permalloy,
Is it okay to use materials such as alperm, thinly sliced Sendas l, or ferrite?Is it best to use an amorphous magnetic alloy that has excellent wear resistance, corrosion resistance, great mechanical strength, and good magnetic properties? desirable. Also,
In fixing the sheet-like magnetic material 11 to the array member 12, methods such as welding, welding, gluing, culling, and press-fitting using various materials are used. In order to create the block-like body 22, the arrangement member 12 to which a plurality of sheet soft magnetic materials 11 are fixed is used as one unit, and a filler material (for example, a glass material with a low softening point) that becomes the non-magnetic material 13 is used. , Sn, P
(alloys such as In, Cu, etc., or plastic compounds) are molten and pulled up, or
This is done by placing this unit into a mold and injecting a filler.

As a result, as shown in FIG. 7, sheet-like magnetic materials 11 are arranged in one block-like body 22 in a constant posture and at constant spacing.

Then, the outer shape of the block-like body 22 is processed into a predetermined cross-sectional shape corresponding to the shape of the magnetic circuit member as shown in FIG. ) and make a plurality of magnetic circuit members 10A, 1 (J13) of the desired shape at the same time. In this case, the slices are
1 or along a plane inclined at a predetermined angle with respect to the sheet-like magnetic material 11.

According to the above embodiment, the array member processed into a comb blade shape]
A sheet-like magnetic material 11 of a predetermined thickness is implanted and fixed in the magnetic material 2, and the whole or a part thereof is filled with a filling substance that becomes the non-magnetic material 13 to create a flock-like material 14c22, which is processed. Since the magnetic circuit part 1410A and IOB can be obtained, many magnetic circuit members can be created at the same time.
OJ is the best way to improve production efficiency.
It is Noh.

Further, since the alignment member 12 can maintain the posture and interval of the sheet-like magnetic material 11 constant, it is easy to enshrine highly accurate magnetic circuit members.

In addition, in the above embodiment, as shown in FIG.
1 were formed perpendicularly to the technique direction of the array member 12, but
As shown in FIG. 11, the positioning grooves 21 may be formed at an angle θ with respect to a line perpendicular to the direction of the technique of the array member 12. This makes it possible to easily configure the magnetic circuit member even when the gap is tilted at an angle of 90 degrees in accordance with the media sliding direction, that is, when controlling the center angle during recording. Wear. Furthermore, it is possible to increase the accuracy of slicing by slicing a block-like object on a plane perpendicular to the block.

Furthermore, if the array member 12 is made of a conductive material, (a5
It is possible to ground the head using contact with the first surface and easily prevent static electricity.

Alternatively, a plurality of sheet-like magnetic materials may be formed into a VL layer and fitted into the positioning groove 21 of the holder 1 and 12 to be fixed.

As explained above, according to the present invention, although the sheet-like magnetic abrasive material is used, the same processing steps as those for the block-like magnetic abrasive material can be adopted, which greatly improves productivity. It is possible to plan the second direction.

[Brief explanation of the drawing]

Figures (A>, (B), and (C) are perspective views showing the processing steps for conventional block-shaped magnetic 4・A materials;
), (C) are perspective views showing conventional processing steps for sheet-like magnetic materials, FIG. 3 is a perspective view showing an embodiment of a magnetic head according to the present invention, and FIG. 4 is a perspective view showing a process for forming an array member in the embodiment Fig. 5 is a perspective view showing the array member, Fig. 6 is a perspective view showing the sheet-like magnetic material inserted and fixed in the arrangement member, and Fig. ff17 is a perspective view showing the block-shaped body. 8 is a perspective view showing a state in which a block-shaped body has been subjected to external processing, FIG. 9 is a perspective view of a magnetic circuit member obtained by slicing the block-shaped body subjected to external processing, and FIG. 10 is a positioning groove. Fig. 11 is a plan view showing a configuration in which the positioning grooves are provided perpendicularly to the longitudinal direction of the array member.
FIG. 3 is a plan view showing a configuration formed by being inclined at an angle θ with respect to a line perpendicular to the longitudinal direction. I OA, 1 (, 1B... magnetic circuit member, 11
... Sheet-like magnetic material, ]2... Arraying member, 13.
...Nonmagnetic material, 20... Square bar, 21... Positioning groove, 22... Block-shaped body. Patent applicant TDC Co., Ltd. (patent attorney Takashi Murai) Figure 1 Figure 2 Figure 4 Figure 5

Claims (4)

[Claims] (1) A sheet-like magnetic material constituting a magnetic circuit, an array member having a positioning groove into which the sheet-like magnetic material fits, and an arrangement member provided on both sides of the sheet-like magnetic material and the arrangement member. 1. A magnetic head comprising a magnetic circuit member that is integrated with a magnetic circuit member and a non-magnetic material. (2) The magnetic head according to claim 1, wherein the sheet-like magnetic material is an amorphous magnetic alloy. (3) Claim $1 in which the array member is a conductor.
The magnetic head described in Section 1. (4) A sheet-like magnetic $4 material constituting a magnetic circuit is inserted into each positioning groove of the array part I-J having positioning grooves at predetermined intervals, and the sheet-like magnetic $4 material constituting the magnetic circuit is filled in whole or in part with a non-magnetic material to form a block. After constructing the body and processing the outer shape of the block-like body,
A method of manufacturing a magnetic head, comprising: slicing the sheet-like magnetic material along a plane parallel to it or forming a predetermined angle to create a magnetic circuit member having the sheet-like magnetic material.