JPH07121823A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To extend a life time of a magnetic head by forming a coating film having more wear resistance than that of a main forming magnetic core at a part of opposed planes of a magnetic gap of a magnetic recording and reproducing element. CONSTITUTION:This device is provided with a magnetic core 2 for recording, a coil wire 5 for recording, a non-magnetic material spacer 6 for forming a magnetic gap, a magnetic film 14 having wear resistance formed on opposed planes of a magnetic gap of the magnetic core 2. When a magnetic recording medium is traveled on the magnetic core 2, a part W-W of the core 2 is worn as shown by broken line, but a coating film 14 is hardly worn. Therefore, spacing owing to wear is not required, and wear quantity of a magnetic gap depth Gd1 is extremely small. Thus, degradation of characteristics can be prevented and a life time can be extended, with comparatively low manufacturing cost and without losing environmental resistance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus for recording / reproducing information via a magnetic recording medium, and more particularly to a magnetic recording / reproducing element of its magnetic head.

[0002]

2. Description of the Related Art FIG. 4 is a three-sided view of an example of a conventional read / write magnetic head (magnetic recording / reproducing element). (A) is a plan view, (b) is a side view, (c) is a sectional view taken along the line AA of (a).

In FIG. 4, 1 is a reproducing magnetic core, 2 is a recording magnetic core, 3A and 3B are core holders, 4 is a reproducing coil wire, 5 is a recording coil wire, 6 is a magnetic gap spacer, and 7A, 7B is each terminal block, 8 is a recording dummy magnetic core, 9 is a magnetic blocking plate, and 10 is a spacer between the reproducing / dummy magnetic core 1/8, which are constituted by these respective elements. The recording-only track has a recording magnetic head structure as shown in the model diagram of FIG.

In this type of magnetic head, as shown in the model diagram of the actual running state in FIG. 3, a mechanism is widely used in which a magnetic recording medium 13 such as a magnetic tape is closely attached to the magnetic head 11 by a rubber roller 12. .

[0005]

However [0007], in the conventional example as described above, has the highest contact pressure apex portion of the magnetic head 11 is in the running state shown in Figure 3, in FIG. 2 by the dashed line W _o As shown in the figure, the head is worn into an R shape in the direction opposite to the radius of curvature R of the head tip, and the regular gap depth Gd1 at the time of new product is drastically reduced (indicated by Gd2). The abrasion causes deterioration in characteristics due to spacing, which shortens the service life of the head.

Further, if the material of the magnetic core is changed in order to improve this, there are problems that the price becomes high, the level of the characteristic is lowered, and the environment resistance is deteriorated.

The present invention has been made in view of the above situation, and does not impair the environmental resistance, and at a relatively low cost, it is possible to reduce the characteristics and the life due to the wear of the top of the magnetic head of this kind. The purpose is to provide a magnetic head structure that can be prevented.

[0008]

Therefore, according to the present invention, in this type of magnetic recording / reproducing apparatus, at least a part of the magnetic gap facing surface of the magnetic recording / reproducing element has a wear resistance higher than that of the main magnetic core. It is intended to achieve the above object by forming a coating film having properties.

[0009]

According to the structure of the present invention as described above, the wear resistance of the head tip is improved by providing a magnetic film or a non-magnetic film having higher wear resistance than the magnetic core on the gap facing surface. It is the one.

[0010]

EXAMPLES The present invention is described below based on examples:
FIG. 1 is a structural explanatory view (corresponding to FIG. 2) of an embodiment of a magnetic head according to the present invention, and the same (corresponding) constituent elements as in FIG. Reference numeral 2 is a recording magnetic core, 5 is a recording coil wire, 6 is a non-magnetic material spacer for forming a magnetic gap, and 14 is a wear-resistant magnetic film formed on the surface of the magnetic core 2 facing the magnetic gap. Is. Here, when the traveling mechanism as shown in FIG. 3 is used for traveling, as shown by the broken line in FIG. 1, the coating portion is hardly worn and the core portion is worn. In addition, the wear amount of the magnetic gap depth Gd1 can be extremely reduced.

(Other Embodiments) The wear resistant film can be formed of a nitride film or the like obtained by film formation in a nitrogen atmosphere. Further, by making this wear-resistant coating a magnetic material having magnetic characteristics equal to or higher than those of the main magnetic core, characteristic deterioration due to spacing is almost eliminated, but even non-magnetic material does not cause a step with the magnetic core 2. It is possible if the material has wear performance.

[0012]

As described above, according to the present invention,
Relatively low cost by forming a magnetic or non-magnetic film having wear resistance higher than that of the magnetic core on the entire surface or at least part of the magnetic gap facing surface of the magnetic core of the magnetic head of the magnetic recording / reproducing apparatus. Thus, it was possible to prevent deterioration of characteristics and extend the life of the magnetic head without impairing the environmental resistance.

[Brief description of drawings]

FIG. 1 is a model diagram of an embodiment of the present invention.

FIG. 2 is a model diagram of an example of a conventional magnetic head.

FIG. 3 is a model diagram of the actual running state of the magnetic head

FIG. 4 is a trihedral view of an example of a conventional magnetic head.

[Explanation of symbols]

 1 reproducing magnetic core 2 recording magnetic core 3A, 3B core holder 4 reproducing coil wire 5 recording coil wire 6 non-magnetic spacer 7A, 7B terminal block 8 dummy magnetic core 9 blocking plate 10 reproducing core / dummy core blocking plate 11 Magnetic head 12 Rubber roller 13 Magnetic recording medium 14 Abrasion resistant coating

Claims (1)

[Claims] 1. A magnetic recording / reproducing apparatus comprising a magnetic recording / reproducing element, wherein a film having abrasion resistance equal to or higher than that of a main magnetic core is formed on at least a part of a surface facing a magnetic gap.