JPS6236713A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To produce a magnetic head having a low level of magnetic resistance in a small number of manufacturing processes, by pressing a gap material to a single core block or holding the gap material with the elastic force. CONSTITUTION:A single magnetic core block 1 has a winding hole 2 at the position near its center for winding a coil by a molding process, a laser process, etc. Then a gap groove 4 serving as a gap forming surface is formed at the block 1 by a grinding process, a laser process, etc. A gap material 3 uses a nonmagnetic material like a titanium foil, etc. and is put into the groove 4. Thus the material 3 is held by the groove 4 and the block 1 is held with pressure at both sides in the direction vertical to the lengthwise direction of the groove 4. As a result, the block 1 is put together with the material 3 and a magnetic path including a gap is formed. Then a tape rubbing surface IS of an obtained magnetic head is polished. Thus a desired magnetic head is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing a magnetic head for recording and reproducing.

Conventional technology In recent years, with the development of high-density recording technology, there has been a demand for the practical use of high coercive force magnetic materials, improvements in processing technology, and miniaturization and cost reduction of the magnetic recording devices necessary for this. . Among these, the magnetic head accounts for a high proportion of the device cost, and there is a desire to develop a head that can be mass-produced.

However, conventional magnetic heads are structurally complex, and machining has a large effect on magnetic properties, and furthermore, due to their structure, the manufacturing process requires a large amount of time. As a conventional technique, there is known a magnetic head formed by integrating a pair of magnetic block cores by mechanical bonding, as disclosed in, for example, Japanese Patent Application Laid-Open No. 65-70928.

The conventional magnetic head as described above will be explained below with reference to the drawings.

FIG. 5 is a perspective view showing the structure of a conventional magnetic head.

In FIG. 6, sa and sb are half-offs of the magnetic head. 6 is a winding groove pre-processed on the bonding surface of both or one of the head block halves sa and 5b for winding the coil; This is the joint surface to which glass or the like is attached.

The magnetic head configured as above will be explained below.

First, the opposing surfaces of the head block halves 5a and 5b are mirror-finished. Next, head block half-day 51L.

A winding groove 6 for winding the coil after completion is formed on the contact surface 7 of either or one of the ends 5b. A thin film and an adhesive layer are formed on the bonding surface 7, which will be the gap surface, by a thin film forming technique such as sputtering or vapor deposition, and the head blocks half-closed 52L, 5b are bonded. By melting the adhesive layer, the hend block is partially closed 5a.

5b are fused together to form a magnetic head.

Problems to be Solved by the Invention However, in a magnetic head having a structure in which a pair of head core blocks are butted together as described above, it is necessary to manufacture the divided cores by integrating them, which may cause distortion during joining. However, there are problems such as thermal effects due to the heat treatment process required for fusion bonding, and decreased head efficiency due to increased magnetic resistance.

Furthermore, due to the structure, there are many manufacturing steps, so the yield is poor○
Therefore, it has been desired to solve the above-mentioned problems and at the same time simplify the head manufacturing process.

In view of the above-mentioned problems, the present invention provides a method of manufacturing a magnetic head that improves head efficiency and simplifies the manufacturing process.

Means for Solving the Problem In order to achieve this object, the method for manufacturing a magnetic head of the present invention includes a method of sandwiching a gap material in the gap of a single head core block having a gap and a winding groove. be.

Operation By suppressing the gap material in a single core block or sandwiching it by elastic force in this way, a magnetic head with a small number of manufacturing steps and low magnetic resistance can be provided.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 and 2 are perspective views showing the general structure of a magnetic head in a first embodiment of the present invention.

In FIG. 1, 1 is a single magnetic head core, 2 is a winding hole for winding a coil, in FIG. 2, 3 is a gap material for forming a gap, and 4 is a cavity into which the gap material is inserted. FIG. 3 is a perspective view of a magnetic head completed according to the present invention.

The manufacturing process for the magnetic head configured as described above will be explained. First, as shown in FIG. 1, a magnetic single core block 1 having a winding hole 2 for winding a coil near the center is formed by molding or a processing technique such as laser processing.

A gap groove 4, which will become a gap forming surface, is formed in the single hemlock core 1 formed by the above method using a grindstone, laser processing, or other technique. The depth of the gap groove penetrates to the winding hole, and the single head core 1 has a shape having a contact surface that becomes a gap in the upper part of the core.

As shown in FIG. 2 in a single hemisode core 1 including a void, a gap material 3 is inserted into a gap groove 4 and held therebetween. The gap material 3 is made of a non-magnetic material, such as titanium foil. The gap material 3 is held between the gap grooves 4, and the single hemlock core 1 is pressed and held from both sides using a jig or the like in a direction perpendicular to the longitudinal direction of the gap grooves 4. Therefore, the single head core 1 is joined via the gap material 3 to form a magnetic path including the gap. By polishing the tape sliding surface 1S of the magnetic head formed by the above manufacturing method, a desired magnetic head as shown in FIG. 3 can be obtained.

As described above, since the method for manufacturing the magnetic head of this embodiment uses a single core block, the magnetic resistance can be reduced. Furthermore, since the gap can be formed by pressing the core plot, the manufacturing process can be simplified.

A second embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 2) FIG. 4 is a perspective view showing the general structure of a magnetic henode according to a second embodiment of the present invention.

In the same figure, 1 is a single core block, 2 is a winding hole, and 3 is a single core block.
2 is a gap material, 4 is a gap groove, and the above structure is the same as that shown in FIG. The difference from FIG. 2 is that the single core block 1 is held and joined by the elastic force of the core block itself.

A method of manufacturing the magnetic head configured as described above will be described below.

First, a magnetic single core block 1 having winding holes 2 in the core block is formed using a processing technique such as molding or laser processing as in the first embodiment of the present invention.

Gap grooves 4 are formed in the core block 1 using a grindstone, laser processing, or other techniques to form a contact surface that becomes a gap in the upper part of the single core block 1. A gap material 3 is placed in a gap groove 4 in a single head core 1 including a void portion.
Insert the gear knob material 3 due to the elastic force of the core block 1.
to hold. Therefore, the AA head cores are joined via the gap material 3 to form a magnetic path including the gap.

By polishing the tape sliding surface of the magnetic head formed by the above manufacturing method, a desired magnetic head can be obtained, as in the first embodiment of the present invention.

As described above, by sandwiching and joining the gap material in a single core block using the elastic force of the core block itself, magnetic resistance can be reduced and the manufacturing process can be simplified.

Effects of the Invention As described above, the magnetic head manufacturing method of the present invention has a structure in which the gap material can be held in the gap of a single head core block by pressing or by the elastic force of the core block itself, so that the magnetic head It is possible to reduce resistance, improve head efficiency, and simplify the manufacturing process, and its practical effects are significant.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a single core of a magnetic head according to the first embodiment of the present invention, FIG. 2 is a perspective view showing insertion of a gap material, and FIG. 3 is a completed state of the magnetic head according to the present invention. FIG. 4 is a perspective view of a single head core of a magnetic head according to a second embodiment of the present invention, and FIG. 5 is a perspective view showing the general structure of a conventional magnetic head. 1...Single core block, 2...mark/winding hole,
3...Gear lug material, 4...Gap groove, 5...Core block half-closed, 6...Winding groove, 7...Joining Name of agent: Patent attorney Toshio Nakao and 1 other person

Claims (1)

[Claims] By sandwiching a gap material in the gap of a single head core block having a gap and a winding groove and pressing the single head core block, or by using the elastic force of the single head core block, A method for manufacturing a magnetic head, characterized in that a gap material is held in the gap to form a recording/reproducing gap.