JPH0363911A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent the interference of magnetism between magnetic heads by providing magnetic material members in the groove parts formed between two sliding surfaces. CONSTITUTION:The two magnetic heads 100A, B which are exactly the same are used in a pair on both sides of a magnetic recording medium 50. The magnetic cores 53A, B of the two magnetic heads 100A, B exist on both sides of the magnetic materials A, B equipped in the groove parts and the influence of the magnetic fluxes formed by the respective coils 54A, B is cut by these magnetic materials 1A, B. The interference of the magnetic fluxes between the two magnetic heads is prevented in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head, and particularly to a double-sided magnetic head used in a double-sided floppy disk device.

[Conventional technology]

Conventional examples are shown in FIGS. 3 and 4.

In the conventional example shown in FIG. 3, there are two sliding surfaces 51 that slide in contact with the surface of a magnetic recording medium 50 that is driven to rotate at high speed by an external force (not shown); Recording is performed on the magnetic recording medium 50 by being embedded in the groove portion 52 with a rectangular cross section interposed therebetween and one of the two sliding surfaces 51 so as to form the same surface as the sliding surface 51.
It has a magnetic core 53 that performs reproduction and erasing.

The magnetic core 53 has an E-shape, and is equipped with a recording and reproducing coil 54 at one end and an erasing coil 55 at the other end.

FIG. 4 shows a state in which the magnetic head 100 is mounted. Here, two identical magnetic heads 100A and 100B are mounted with the magnetic recording medium 50 sandwiched between them so that the magnetic cores 53 are on opposite sides of each other with the groove 52 in between.

In this state, the two magnetic heads 100A and 100B are moved together in the radial direction of the magnetic recording medium 50 (direction A in the figure),
Recording, playback, and erasing are performed on a predetermined track.

[Problem to be solved by the invention]

However, in the above-mentioned conventional example, as shown in FIG. There is a drawback that during a reproducing operation, the reproducing magnetic flux of the second magnetic core 53B provided in the other magnetic head 100B leaks, giving noise to the first magnetic core 53A. For this reason, there was a problem that accurate recording or reproduction of information could not be performed.

[Purpose of the invention]

An object of the present invention is to provide a magnetic head that can improve the disadvantages seen in the conventional example, prevent magnetic interference between magnetic heads, and ensure accurate recording and reproduction of information. be.

[Means to solve the problem]

The present invention has two sliding surfaces that come into sliding contact with a magnetic recording medium, and a magnetic core for information recording, reproduction, or erasing that has the same sliding surface as the sliding surface on one sliding surface side. It is buried. Then, a method is adopted in which a magnetic member is provided in the groove portion formed between the two sliding surfaces. This aims to achieve the above-mentioned purpose.

[For production]

A magnetic recording medium is driven to rotate at high speed by an external force. Two magnetic heads are positioned at predetermined track positions on a rotating magnetic recording medium with the magnetic recording medium in between. Both sliding surfaces of the magnetic head are in contact with the magnetic recording medium, and information is recorded by a magnetic core embedded in the sliding surfaces.

Regeneration and deletion occur. Since the magnetic cores of the two magnetic heads are present with the magnetic material provided in the groove sandwiched between them, the influence of each magnetic flux is cut by the magnetic material.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2. Here, the same reference numerals are used for the same constituent members as in the conventional example described above.

The embodiment shown in FIG. 1 has two sliding surfaces that come into sliding contact with the magnetic recording medium, and one sliding surface has the same sliding surface as that for information recording and reproduction. Alternatively, in a double-barrel type magnetic head in which an erasing magnetic core is embedded, a magnetic member is provided in a groove portion formed between the two sliding surfaces and is driven to rotate at high speed by an external force (not shown). Two sliding surfaces 51 that slide in contact with the surface of the magnetic recording medium 50, a groove 52 with a rectangular cross section interposed between these two sliding surfaces 51, and two sliding surfaces 51.
A magnetic core 53 is embedded in one of the magnetic recording media 50 so as to form the same surface as the sliding surface 51, and is used for writing, writing, and erasing information on the magnetic recording medium 50. And the groove part 52
A plate-shaped magnetic body 1 is attached to the bottom of the housing over the entire length.

The magnetic core 53 has an E-shape, and is equipped with a recording and reproducing coil 54 at one end and an erasing coil 55 at the other end.

FIG. 2 shows the operating state of the magnetic head 100 of the present invention.

In a floppy disk device using the magnetic head 100 of the present invention, two identical magnetic heads 100A and 100B are used to drive one floppy disk (5
0) are used in pairs. At this time, the magnetic recording medium 50 is driven to rotate at high speed by an external force (not shown).

Then, the two magnetic heads 100A and 100B are moved in the radial direction of the floppy disk (50) while holding the rotating floppy disk (50) between them, and are positioned at a predetermined track position. .

At this time, the sliding surfaces 51 of the magnetic head 100 are both in contact with the surface of the floppy disk (50), and when the magnetic head 100 is fixed at a predetermined position on the floppy disk (50), the sliding surfaces 51 The recording/reproducing coil 54 or the erasing coil 55 provided in the magnetic core 53 embedded in the floppy disk (50) is activated to record, reproduce, and erase information on the floppy disk (50).

As shown in FIG. 2, the recording/reproducing coil 54 or the erasing coil 55 operates in the magnetic cores 53A of the two magnetic heads 100A and 100B.

B is a groove portion 52A, a magnetic body IA provided in B,
The magnetic bodies IA and B exist on both sides of the magnetic body IA and B, and the influence of the magnetic flux formed by the respective coils 54A and 54B is cut off by the magnetic bodies IA and B.

〔Effect of the invention〕

As described above, in the present invention, a magnetic material is attached to the groove portion that partitions the two sliding surfaces of each magnetic head.

Therefore, in a floppy disk device that uses two magnetic heads as a pair, the magnetic cores of the two magnetic heads that are located on both sides of the floppy disk are diagonally opposite each other with the magnetic material provided in the groove between them. Therefore, the influence of the magnetic flux formed by each coil during operation is cut by this magnetic body.

Therefore, it is possible to provide an unprecedented magnetic head that can prevent magnetic flux interference between the two magnetic heads and ensure accurate information recording and reproduction.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG.
1! A cross-sectional view showing the state in which the magnetic head of No. 1 is mounted, No. 3
The figure is a perspective view showing a conventional example, and FIG. 4 is a sectional view showing a state in which the conventional magnetic head shown in FIG. 3 is mounted. DESCRIPTION OF SYMBOLS 1...Magnetic material, 50...Magnetic recording medium, 51...Sliding surface, 52...Groove portion, 5
3...Magnetic core, 100...Magnetic head

Claims (1)

[Claims] (1) has two sliding surfaces that come into sliding contact with the magnetic recording medium,
In a twin-barrel magnetic head in which a magnetic core for recording, reproducing, or erasing information is embedded in one of the sliding surfaces, the magnetic core has the same sliding surface as the sliding surface. A magnetic head characterized in that a groove portion formed between the two is equipped with a magnetic material member.