JPH1049815A - Magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a magnetic head and improve the productivity, by forming the coil for recording and reproducing to a small capacity magnetic head core in single layer. SOLUTION: This magnetic head is provided with small capacity magnetic head cores 1a, 1A and a large capacity magnetic head core not illustrated and a recording and reproducing coil 5 is formed as a single layer coil having terminals A, B to the magnetic head core 1a. At the time of recording magnetic recording to the magnetic disc is performed using a magnetic flux generated at the magnetic head core 1a depending on the signal flowing in the X direction between the terminal A, B and the signal flowing in the Y direction. In the case of reproducing, the signal flowing in the X and Y directions of the coil 5 through the magnetic head core 1a is extracted as the electrical signal from the terminals A, B. Since the coil 5 is formed as explained above, the number of turns of coil 5 is reduced to a half in comparison with the related at. Thereby shape of the magnetic head core or bobbin is reduced in size and the magnetic head is also reduced in size, and the productivity can also be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a low-capacity (low-density) device.
The present invention relates to a magnetic head having a magnetic head core for high-capacity (high-density) and a magnetic head core for high capacity (high density).

[0002]

2. Description of the Related Art Generally, a magnetic disk device such as a floppy disk device is configured to record and reproduce information by a magnetic head. The magnetic head is held by a head carriage, and the magnetic head is moved to an arbitrary position on the floppy disk by moving the head carriage between the inner peripheral side and the outer peripheral side of the floppy disk. In recent years, high-density (high-capacity) recording / reproduction has been performed, and the conventional low-density (low-capacity) 1 MB
Floppy disks having a recording capacity of (megabytes) or 2 MB to 100 MB or more have been developed.

Generally, a magnetic head having a low-capacity magnetic head core and a high-capacity magnetic head core is shown in FIGS.
It is shown in. In these figures, 1a and 1A are magnetic head cores made of a magnetic material for low capacity, 5 is a recording and reproducing coil wound around the magnetic head core 1a, 6 is an erasing coil wound around the magnetic head core 1A, Reference numeral 7 denotes a back core for forming a magnetic path fixed to the ends of the magnetic head cores 1A and 1a, reference numerals 2 and 3 denote a resin slider for holding the magnetic head cores 1A and 1a, and reference numeral 8 denotes a cutout formed in the slider 3. Reference numeral 10 denotes a high-capacity magnetic head core fixed to the notch 8 by glass 9, and 11 denotes the magnetic head core 1.
A recording / reproducing coil wound around 0 is a shield ring made of a magnetic material for shielding external magnetism.

In FIG. 3, a gap G4 for performing erasing and a gap G3 for performing recording and reproduction are formed by the magnetic head cores 1a and 1A on the low capacity side, and a gap G5 for performing recording and reproduction is formed on the high capacity side. .

[0005] With the above-described magnetic head, recording and reproduction of a low-capacity magnetic disk and a high-capacity magnetic disk are performed.

Next, a conventional magnetic head will be described with reference to FIG. In the figure, portions corresponding to FIGS. 3 and 4 are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG.
In the medium, the recording / reproducing coil 5 has a common terminal F provided between the terminals E and G. During recording, a magnetic flux generated in the magnetic head core 1a based on a signal in the X direction flowing between the terminals E and F;
Magnetic recording on a magnetic disk is performed using a magnetic flux generated in the magnetic head core 1a based on a signal flowing in the Y direction between the terminals G and F. Similarly, in the case of reproduction, the magnetism from the magnetic disk is passed through the magnetic head core 1a and the coil 5
Signals flowing in the X direction from terminals E and F and the coil 5
The signals flowing in the Y direction are extracted as electrical signals from terminals G and F, respectively. The terminals H and I are terminals of the coil 6 for erasing.

The coil 5 includes a coil 5a formed between the terminals E and F and a coil 5 formed between the terminals G and F.
The coils 5a and 5b are wound directly on the magnetic head core 1a or on a coil bobbin mounted on the magnetic head core 1a by a bifilar or a laminate.

[0008]

However, in the above configuration, since the coil 5 is formed by the coils 5a and 5b, the number of turns is increased, so that the magnetic head becomes large and the number of winding work steps is increased. There is a problem that it is not suitable for productivity.

[0009]

The object of the present invention is to provide a magnetic head having a low-capacity magnetic head core and a high-capacity magnetic head core, wherein the low-capacity magnetic head core includes:
The problem is solved by winding a recording / reproducing coil with a monofiler.

According to the above configuration, since the coil 5 is formed as a single unitary monolayer (single layer), the number of turns is reduced to about half, so that the magnetic head is reduced in size and the winding operation process is reduced. Because of the decrease, productivity is improved.

[0011]

FIG. 1 shows an embodiment of a magnetic head according to the present invention. In FIG.
4 are denoted by the same reference numerals, and detailed description thereof will be omitted. In FIG. 1, a recording / reproducing coil 5 is formed as a single coil having terminals A and B, and a magnetic flux generated in a magnetic head core 1a based on an X-direction signal flowing between the terminals A and B during recording. And Y between the same terminals A and B
The magnetic recording is performed on the magnetic disk using the magnetic flux generated in the magnetic head core 1a based on the signal flowing in the direction.
In the case of reproduction, similarly, the magnetic field from the magnetic disk passes through the magnetic head core 1a, the signal flowing in the X direction of the coil 5 from the terminals A and B, and the signal flowing in the Y direction of the coil 5 from the same terminals A and B. Each is extracted as an electric signal. The terminals C and D are terminals of the coil 6 for erasing.

Here, the coil 5 is composed of only the coil formed between the terminals A and B as described above, and the coil 5 is directly mounted on the magnetic head core 1a or mounted on a coil bobbin mounted on the magnetic head core 1a. It is wound as a monofiler (single-layer winding).

According to the above configuration, the number of windings of the coil is reduced by about half, so that the shape of the magnetic head core or bobbin is reduced, and the magnetic head is reduced in size. This reduces the number of winding work steps.

[0014]

As described above, the magnetic head according to the present invention is a magnetic head having a low-capacity magnetic head core and a high-capacity magnetic head core. Since the coil for use is wound in a monofile, the size of the magnetic head is reduced, and the number of coil winding operations is reduced, thereby improving productivity.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of an embodiment of a magnetic head according to the present invention.

FIG. 2 is a diagram showing a main part of a conventional magnetic head.

FIG. 3 is a diagram showing a general magnetic head.

FIG. 4 is an exploded perspective view showing a general magnetic head.

[Explanation of symbols]

1a, 1A Low-capacity magnetic head core 2, 3 slider 5 Recording / reproducing coil 6 Erasing coil 10 High-capacity magnetic head core 11 High-capacity coil

Claims (1)

[Claims] 1. A magnetic head comprising a low-capacity magnetic head core and a high-capacity magnetic head core, wherein a recording / reproducing coil is wound around the low-capacity magnetic head core with a monofiler. Magnetic head for magnetic disk.