JPS5891518A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent deterioration of recording, reproducing and erasing effects, by placing a nonmagnetic metallic block so as to face the opening part of a shielding case of a magnetic head, filling it with a resin in this state, and fixing a magnetic core to the shielding case as one body. CONSTITUTION:A block 15 is placed so as to pinch the tip part of a magnetic core half body 3 from both sides, in a space between the magnetic core half body 3 and a shielding case 1, facing an opening part 1a, as shown in figure. Subsequently, in a state that this block 15 has been fitted, a resin 6 is filled, and component parts such as the magnetic core half body 3, a core support 2, etc. are fixed as one body with the shielding case 1. The block 15 has been exemplified as that which has been installed both the front and the rear in the magnetic recording medium running direction by pinching a gap 4, but even in case of only one side, it is possible to prevent that a coating agent of the magnetic recording medium adheres.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head, and more particularly to a magnetic head having an improved structure in the direction in which a magnetic recording medium runs.

A conventional magnetic head has been constructed as shown in FIGS. 1 to 3, for example.

That is, what is indicated by the symbol 1 in the figure is a shield case,
A magnetic core half body 3°, 3 is mounted inside the shield case 1 while being supported by a core support 2, and the magnetic gap 4 side is formed on the side of the shield case 1 in the traveling direction of the magnetic recording medium 5. A structure is adopted in which the resin 6 is filled and fixed integrally in a state facing the opening 1a.

What is indicated by the symbol 7°8 is the protective plate 9, 1 of the magnetic core half body 3.
0 is a shield plate made of a magnetic material to prevent crosstalk between the cores, 11.12 is a spacing plate made of a non-magnetic metal to regulate the position of the shield plate and the width of each magnetic core half 3, 13 1 is a terminal block integrated with the coil pobin, and 14 is a terminal conductor.

When the magnetic recording medium 5 is run under such a structure and the magnetic head is attached, the frictional heat or static electricity generated during the run causes the magnetic material coated on the side of the magnetic recording medium such as the magnetic tape to be removed. The coating agent may adhere to the part 5 of the resin 6, and it may protrude forward as shown by the reference numeral 6.a in FIG.
It may cover the front of the When such a phenomenon occurs, there is a drawback that the magnetic recording medium 5 and the magnetic head are not completely in contact with each other, and the recording, reproducing or erasing effects are reduced.

The present invention is designed to eliminate the above-mentioned conventional drawbacks, and prevents the coating agent of the magnetic recording medium from being deposited on the magnetic recording medium sliding surface side of the magnetic head.
It is an object of the present invention to provide a magnetic head configured so as not to affect read and erase characteristics.

In order to achieve the above object in the present invention, a plate made of a non-magnetic material is provided between the shield case and the magnetic core facing the opening of the shield case, and the magnetic core is molded. A closed structure was adopted to prevent the resin from being exposed on the running surface of the magnetic recording medium.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Figures 4 to 6 are for explaining one embodiment of the present invention. In each figure, the same parts or corresponding parts 1 as in Figures 1 to 3 are given the same reference numerals, and the explanation thereof will be omitted. .

In the figure, the reference numeral 15 indicates a block made of non-magnetic metal, and as shown in FIG. They are arranged so as to sandwich the tip portion of the magnetic core half body 3 from both sides. With this block 15 attached, resin 6 is filled to integrally fix components such as the magnetic core half 3 and the core support 2 with the shield case 1.

In this embodiment, the blocks 15 are installed on both the front and rear sides in the running direction of the magnetic recording medium across the gap 4, but even if the blocks 15 are installed only on either side, the adhesion of the coating agent on the magnetic recording medium can be avoided. can be prevented. By the way, the block 15 is a magnetic core half 3 as shown in FIG.
When the shield plate 9 and the spacing plate 11 are laminated in advance, the block 15 is also laminated at the same time so that the shield plate 9 and the spacing plate 11 are almost in contact with each other, so that the block 15 can be easily assembled without significantly changing the conventional manufacturing process. be able to. still,
Although the block 15 is illustrated as being integrally formed from non-magnetic metal, it can also be formed by stacking a large number of thin plates using etching processing, press processing, etc.
Extremely cheap; can be implemented.

As is clear from the above description, according to the present invention C2, a block made of non-magnetic metal is placed facing the opening of the magnetic head glued case, and in this state, resin is filled and the magnetic core etc. The shield case (has a structure in which it is integrally fixed in pairs, so the resin is not exposed from the opening side of the shield case, and there is no contact with the magnetic recording medium, making it easy to apply the magnetic recording medium. Recording without agent deposits.

This has the excellent effect that there is no deterioration of the reproduction and erasing effects.

[Brief explanation of the drawing]

Figures 1 to 3 explain the conventional structure, with Figure 1 being a front view of the magnetic head, and Figures 2 and 3 showing different deposition states of the magnetic recording medium coating agent. The cross-sectional plan view and FIGS. 4 to 6 are for explaining one embodiment of the present invention. FIG. 4 is a front view, FIG. 5 is a cross-sectional plan view, and FIG. 6 shows how the block is installed. FIG. 1... Shield case 2... Core support 3.
...Magnetic core half 4 river gap 5...Magnetic recording medium 6...Resin 15...Block.

Claims (1)

[Claims] The magnetic core is installed inside the shield case, and with a part of the magnetic core exposed through the opening formed on the magnetic recording medium sliding surface side of the shield case, the resin is filled and integrated.
: In a fixed magnetic head, a magnetic head having a width approximately equal to the width of the magnetic core and facing the opening between the magnetic core and the shield case and at least on one side of the front or rear side of the magnetic recording medium running direction with respect to the magnetic gap. 1. A magnetic head comprising a block made of a non-magnetic material and having a size of