JPS63160005A - Magnetic head core and manufacture - Google Patents

Abstract

PURPOSE:To efficiently obtain a magnetic head with ease of processing by bonding a rear core to the rear side of a front core bonded with a magnetic reluctance decreasing core piece prolonged in the direction of head gap on a plane nearly orthogonal to the gap forming plane. CONSTITUTION:Gap regulating tilt slots 101, 201 are formed to one side face being a gap forming plane of head core members 100, 200 and the head core members are bonded to each side face of the remaining head core member 300 being a gap forming plane. Thus, the entire face of the gaps 102, 202 formed in this way is cut into the W shape, a split slot 301 is formed to the core member 300 to form slots 103, 203 connected to the slot 101, 202 from the rear face to the core members 100, 200. Then the cores are cut off along planes 401, 402 to form front cores 111, 211. Furthermore, the channel-shaped rear cores 112, 212 formed separately are bonded to the cores 111, 211. Thus, the efficient magnetic head with ease of processing is attained.

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to a magnetic head core and a method for manufacturing the same, and in particular, it is required that the thickness of the two core pieces forming a gap be thinner in the recording medium running direction. The present invention relates to a type of magnetic head core and a method for manufacturing the same.゛[Prior art] As this kind of magnetic head core, for example, the Japanese Patent Publication No. 43-9
As described in Japanese Patent Application No. 264, there is a type which is made up of a C-shaped core and an engineered core, and the one-shaped core is provided with a step so that the gap is eccentric toward the engineered core.

[Problems to be solved by the invention] However, with this configuration, polishing the gap forming surface that creates a step in the engineered core that forms the head gap is a process for each head core material, and the productivity is extremely low and practical application is extremely difficult. difficult.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a magnetic head core that has good head efficiency and is easy to manufacture without requiring any step polishing process, and a method for manufacturing the same.

[Means for Solving the Problems] The above object is to create a front core with a thinner thickness in the recording medium running direction among the two cores, the L-shaped core and the L-shaped core that form the gap of the front core with a gap. A front core having the above-mentioned magnetic resistance reducing core piece extending in the gap direction bonded to the gap forming plane of the shaped core piece, and a rear core joining the rear side of this front core in a plane substantially perpendicular to the gap forming plane. This is achieved using a magnetic head.

In such a magnetic head core, after bonding a core block having a first groove and a core block having a rough cross-sectional shape at a gap forming plane, a second core block is bonded from a direction opposite to the portion that will become the recording medium running surface. A groove is formed so as to connect to the first groove, and a part of the core block having the first groove remains bonded to the substantially T-shaped core block, and then cut into a predetermined core layer. However, it is obtained by obtaining front cores and joining each front core on its rear side with a rear core in a plane substantially orthogonal to the gap forming plane.

[Function] The abbreviated-shaped core piece, the abbreviated-shaped core piece, and the magnetic resistance reduction core piece are bonded together on one gap forming plane, and the rear core, the abbreviated-shaped core piece, and the magnetic resistance reduction core piece are bonded together. Since it is joined on one plane that is approximately perpendicular to the gap forming surface,
Polishing with steps is not necessary, and since the thickness of the magnetic resistance reducing core piece can be set to any value from the gap forming plane, the magnetic resistance can be maintained small even if the thickness of the substantially I-shaped core is made thin.

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

FIG. 1 is a diagram illustrating a magnetic head core and a method of manufacturing the same according to an embodiment of the present invention. Figure (d) or (e)
, 111, 211 indicates a front core, and the front core forms a gap 102° 202.
Two core pieces, that is, an abbreviated-shaped core piece, an abbreviated-shaped core piece, and a gap-forming plane of the engineered-shaped core piece, and a magnetic resistance reducing device that is adhered to the gap-forming plane of the abbreviated-shaped core piece and the above-mentioned gap. It is composed of front core pieces 114 and 214. Reference numerals 112 and 212 indicate a rear core joined to the opposite side of the gap of the front core;
They are joined at a plane perpendicular to the gap forming plane of the letter-shaped core piece.

Next, an example of the manufacturing method will be described. First, the first
As shown in figure (a), three rectangular head core materials 10
0, 200, and 300 are prepared, gap regulating inclined grooves 101, 201 are formed on one side of two of them, which will be the gap forming plane of the head core materials 100, 200, and these are used to form the gap of the remaining head core materials 300. One front core block is made by bonding one flat side surface with an adhesive, such as glass, as shown in FIG. 1(a). Gaps 102, 202 are thereby formed. Next, the entire surface of the core block on the gap 102° 202 side is ground into a W shape as shown in FIG. 1(b). Although the core block is ground into a W-shape here, the grinding shape does not have to be W-shape, and this step may be omitted. Next, dividing grooves 301 are formed in the three head core materials 300 of the core block, and in the head core materials 1oo and 200 on both sides, gap regulating inclined grooves 101 and 201 are formed from the rear surface as shown in FIG. 1(c). Grooves 103 and 203 are formed. Next, the two planes 4 shown by the dashed-dotted lines in FIG. 1(C)
01, 402 to form a front core 111.211 as shown in FIG. 1(d). From now on, the U-shaped rear core 11 is formed separately from the front core.
2゜212 to the front cores 111, 211 in Figure 1 (e
) to complete the magnetic head core described above.

[Effects of the Invention] As described above, according to the present invention, even when one of the two front core pieces forming the gap is required to be thinner in the medium running direction in the vicinity of the gap, The joint between the front core and the rear core can also be made arbitrarily large, reducing the magnetic resistance at that part, improving the efficiency of the entire head, improving the gap accuracy, and manufacturing these stably and inexpensively. can do.

[Brief explanation of the drawing]

FIGS. 1(a) to 1(e) are diagrams showing a magnetic head core and a method of manufacturing the same according to an embodiment of the present invention. 111.211...Front core, 112,212.
...Rear core 114.214...Core piece

Claims (1)

[Claims] 1. A first front core piece having a first plane, a second plane forming a gap with the first plane at the tip of the first front core piece, and the first front core piece; a second front core piece having a portion parallel to the first front core piece;
a front core consisting of the second front core piece and a third front core piece adhered at a distance from the gap, and a side of the front core opposite to the gap is generally referred to as the first plane; A magnetic head core consisting of a rear core and a rear core that are joined in orthogonal planes. 2. In a method for manufacturing a magnetic head core consisting of a front core and a rear core having a gap, forming a gap in a first head core material of the first and second head core materials each having a gap forming plane and having a thickness and a length. forming a first groove for regulating the gap depth extending in the thickness direction from the vicinity of the gap in the plane, and forming a gap forming plane of the first head core material and a gap forming plane of the second head core material into the gap; a step of adhering the first head core material of the front core block so as to form one front core block; forming a second groove connected to the groove of the first head core material and separating a portion of the first head core material including the gap forming plane from the first head core material; A magnetic device characterized by comprising a step of cutting the front core to the thickness of the head, and a step of joining the separated rear core sides of each front core with the rear core in a plane substantially perpendicular to the gap forming plane. Head core manufacturing method.