JPH0689409A - Magnetic head - Google Patents

Abstract

PURPOSE:To stabilize the electromagnetic conversion characteristics of the magnetic head by simplifying a process for enhancing the accuracy of the magnetic gap depth and magnetic gap length forming a magnetic gap. CONSTITUTION:The butt joint surface 1a of a core half body 1 of the magnetic gap 5 is provided with a slope by broadening the magnetic gap length 9 on the side 4 for sliding contact with a magnetic recording medium and precisely angling from the correlative relation between the resolving power characteristic and overwriting characteristic to the magnetic gap length 9 with the magnetic gap depth 8. As a result, even if the magnetic gap depth 8 is worked small by polishing the side 4 for sliding contact with the magnetic recording medium, the magnetic gap length 9 changes correspondingly to smaller lengths and, therefore, the resolving power characteristic and overwriting characteristic do not fluctuate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head of a magnetic recording / reproducing apparatus, and more particularly to a technique for stabilizing the electromagnetic characteristics of the magnetic head.

[0002]

2. Description of the Related Art A conventional magnetic head will be described with reference to the drawings.

FIG. 2 is an electromagnetic conversion characteristic diagram of the magnetic head, FIG.
FIG. 2A is a resolution characteristic diagram of the electromagnetic conversion characteristics of the magnetic head, FIG.
3B is an overwrite characteristic diagram of electromagnetic conversion characteristics of a magnetic head, FIG. 3 is a side view of a conventional magnetic head, FIG. 3A is a side view of a conventional magnetic head, and FIG. (A)
FIG. 3 is an enlarged side view of the magnetic gap portion of FIG.

The conventional magnetic head is shown in FIG.
As shown in (B), the butt joint surface of the magnetic gap 5 formed by butt-joining the pair of core halves 2 and 19 is a parallel surface, and the magnetic recording medium sliding contact side 4 is polished to reduce the magnetic gap depth. Twenty is adjusted. However, the magnetic gap length 21 is a dimension that is determined at the time of butt-joining the core halves, and precision is required for the dimensions when the core halves are processed and assembled.

The magnetic gap depth 20 and the magnetic gap length 21 affect the electromagnetic conversion characteristics.

As shown in FIG. 2A, in order to improve the resolution characteristics of the electromagnetic conversion characteristics, the magnetic gap depth 20
Must be increased and the magnetic gap length 21 must be decreased. However, as shown in FIG. 2B, in order to improve the overwrite characteristics of the electromagnetic conversion characteristics, the magnetic gap depth 20 must be reduced and the magnetic gap length 21 must be increased. It is necessary to satisfy the opposite characteristic of not becoming.

The magnetic gap depth 20 is adjusted by a polishing dimension 22 when adjusting the magnetic gap.

[0008]

In the above-mentioned conventional magnetic head, since the joining surfaces of the magnetic gaps formed by the butt joining of the pair of core halves are parallel surfaces, the sliding contact side of the magnetic recording medium is polished. Although the magnetic gap depth can be adjusted, the magnetic gap length is a dimension that is determined when the pair of core halves are butt-joined together, and unless high precision is provided from the beginning, it affects the electromagnetic conversion characteristics. Even in the process of adjusting the magnetic gap depth by polishing, the height of each magnetic head must be measured, and products of the same rank must be selected and polished, which is a problem in terms of management. There is.

An object of the present invention is to provide at least one of the butt joint surfaces of a pair of core halves of a magnetic gap with an inclined surface that widens the magnetic gap length on the sliding contact side of a magnetic recording medium. Another object of the present invention is to provide a magnetic head which solves the above-mentioned drawbacks, simplifies the process of increasing the accuracy of the magnetic gap depth and the magnetic gap length for forming the magnetic gap, and stabilizes the electromagnetic conversion characteristics of the magnetic head.

[0010]

The magnetic head of the present invention comprises:
In a magnetic head formed by abutting and joining a pair of core halves to each other to form a magnetic gap, the magnetic gap length on the sliding contact side of the magnetic recording medium is wide on at least one of the abutting and joining surfaces of the core halves of the magnetic gap. The inclined surface is provided as follows.

[0011]

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

FIG. 1 is a side view of a magnetic head of one embodiment of the present invention, FIG. 1A is a side view of the magnetic head of this embodiment, and FIG. 1B is a magnetic gap portion of FIG. 1A. 2 is an electromagnetic conversion characteristic diagram of the magnetic head, FIG. 2A is a resolution characteristic diagram of the magnetic head electromagnetic conversion characteristic, and FIG. 2B is an overwrite characteristic diagram of the magnetic head electromagnetic conversion characteristic. .

1 (A) and 1 (B), the magnetic head of this embodiment has a magnetic gap 5 formed by a pair of core halves 1 and 2 made of butt-bonded glass 3, and a core half 1 and 1. Two
Attached to the back bar 6 forming a magnetic path, and the core half 1
And a coil 7 wound around.

The electromagnetic conversion characteristics of the magnetic head are shown in FIG.
As shown in FIG. 2 (A), the characteristics of the resolution are generally as shown in FIG. The characteristics 13, 14 and 15 are shown, and the characteristics are improved by increasing the magnetic gap depth 8 and decreasing the magnetic gap length 9. Further, the overwrite characteristic is improved by increasing the magnetic gap length 9 as shown in FIG. 2 (B).

The magnetic gap depth 8 is adjusted by the polishing dimension 10 when adjusting the magnetic gap.

Next, the electromagnetic conversion characteristics of the magnetic head of this embodiment will be described with reference to the drawings.

1 and 2, in the magnetic head of this embodiment, the butt joint surface 1 of the core half 1 of the magnetic gap 5 is joined.
a, the magnetic gap length 9 on the magnetic recording medium sliding contact side 4 becomes wide, and the resolution characteristic 13 with respect to the magnetic gap length 9,
14, 15 and the overwrite characteristics 16, 17, 18 and the magnetic gap depth 8 are accurately angled from each other, and the inclined surface is provided to polish the magnetic medium sliding contact side 4 to form the magnetic gap depth 8. Since the magnetic gap length 9 also changes to a small value even if it is processed to be small, the resolution characteristics 11 and the magnetic gap junction surface when the magnetic gap junction surface of FIGS. 2A and 2B is inclined. The overwrite characteristic 12 is obtained when tilted, and stable electromagnetic conversion characteristics are obtained.

[0018]

As described above, in the magnetic head of the present invention, the magnetic gap length on the magnetic recording medium sliding contact side is widened on at least one of the butt joint surfaces of the pair of core halves of the magnetic gap. By providing such an inclined surface, even if there is a variation in the step of adjusting the magnetic gap depth by polishing the sliding contact side of the magnetic recording medium, the magnetic gap length is changed, so that stable electromagnetic conversion characteristics can be obtained. There is an effect.

[Brief description of drawings]

FIG. 1 is a side view of a magnetic head according to an embodiment of the present invention. FIG. 1A is a side view of the magnetic head of this embodiment. FIG. 1B is an enlarged side view of the magnetic gap portion of FIG.

FIG. 2 is an electromagnetic conversion characteristic diagram of a magnetic head. Figure 2
FIG. 7A is a resolution characteristic diagram of magnetic conversion characteristics of a magnetic head. FIG. 2B is an overwrite characteristic diagram of the electromagnetic conversion characteristics of the magnetic head.

FIG. 3 is a side view of a conventional magnetic head. Figure 3
FIG. 7A is a side view of a conventional magnetic head. Figure 3
FIG. 3B is an enlarged side view of the magnetic gap portion of FIG.

[Explanation of symbols]

1,2,19 core half body 1a core half body butt joint surface 3 joint glass 4 magnetic recording medium sliding contact side 5 magnetic gap 6 back bar 7 coil 8,20 magnetic gap depth 9,21 magnetic gap length 10,22 magnetic Polishing dimensions when adjusting the gap depth 11 Resolution characteristics when the magnetic gap junction surface is inclined 12 Overwrite characteristics when the magnetic gap junction surface is inclined 13 Resolution characteristics when the magnetic gap length is small 14 Magnetic gap length Medium time resolution characteristics 15 Magnetic gap length large resolution characteristics 16 Magnetic gap length small overwrite characteristics 17 Magnetic gap length medium overwrite characteristics 18 Magnetic gap long overwrite characteristics

Claims (1)

[Claims] 1. A magnetic head comprising a pair of core halves butt-joined to each other to form a magnetic gap, wherein at least one of the butt-joining surfaces of the core halves of the magnetic gap has a magnetic recording medium sliding contact side. A magnetic head having an inclined surface for widening the magnetic gap length of the magnetic head.