JP2778224B2 - Magnetic head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for performing recording and reproduction for use in a flexible magnetic disk drive.

2. Description of the Related Art Conventionally, magnetic heads which are arranged so as to face each other with a flexible magnetic disk (hereinafter, referred to as a disk) generally include a ferrite or the like between a pair of magnetic head assemblies (hereinafter, referred to as a slider). The recording / reproducing and erasing head cores made of the above soft magnetic material are fixed. Hereinafter, the conventional magnetic head will be described with reference to a partially cutaway perspective view shown in FIG.

As shown in FIG. 3, a recording / reproducing head core 31 and an erasing head core 32 are arranged in series to form independent magnetic circuits. The head chip 33 including the cores 31 and 32 is fixedly supported from both sides by sliders 34 and 35 made of a nonmagnetic material such as ceramics. Therefore, the head chip 33 can slide in contact with the disk in a stable state. A recording / reproducing gap 36 is formed in the recording / reproducing head core 31, and an erasing gap 37 is formed in the erasing head core 32. The erasing head core 32 is used for erasing both ends of the track recorded by the recording / reproducing head core 31.Therefore, the erasing gap 37 corresponds to the position of both ends of the recording / reproducing gap 36. Are arranged in two places. A recording / reproducing winding 38 is fitted on the recording / reproducing head core 31, and an erasing winding 39 is fitted on the erasing head core 32. Although the erasing head core 32 constitutes an independent magnetic circuit, it functions integrally with the recording / reproducing core 31 and does not have any function by itself.

With the use of the magnetic head configured as described above, when performing recording and reproduction at different recording densities on a plurality of types of disks having different magnetic characteristics, the recording / reproduction winding fitted to the recording / reproduction head core 31 during recording. By adjusting the current on line 38, it is possible to record on each disk. In particular, by appropriately setting the length of the recording / reproducing gap 36, recording can be performed on each of a plurality of types of disks having different linear recording densities.

As described above, even in the above-described conventional magnetic head, recording and reproduction can be performed with respect to a plurality of types of disks at different recording densities.

However, in the above-described conventional magnetic head, the gap 36 of the recording / reproducing head core 31 and the erasing head core 31
Since each of the 32 gaps 37 can cope only with a certain track width, there is a problem that it is impossible to cope with a plurality of types of recording systems having different track widths.

The present invention solves such a conventional problem, and provides a magnetic head capable of coping with a plurality of recording systems having different track widths. It is an object of the present invention to provide a magnetic head capable of improving the magnetic head.

Means for Solving the Problems In order to achieve the above object, the present invention has a plurality of head chips having recording and reproducing gaps having different track widths, and a plurality of head chips constituting an independent magnetic circuit, and The wide head has an erase head for erasing both sides of the track, and the recording / reproducing gaps having different track widths are arranged on opposite sides of an access line passing through the center of the recording track. And each head chip constituting the magnetic circuit,
This is a configuration characterized by being combined as an upper and lower pair and not overlapping vertically.

Operation Therefore, according to the present invention, it is possible to cope with recording and reproduction with different track widths by using recording and reproduction gaps with different track widths in a plurality of independent head chips.

Further, each head chip can be operated without magnetic interference with each other.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing a magnetic head according to an embodiment of the present invention.

As shown in FIG. 1, the first head chip 1 has about 12
A recording / reproducing head core 2 and an erasing head core 3 each having a wide track width of 0 μm and made of ferrite or the like are arranged in series to form independent magnetic circuits.
A recording / reproducing gap 4 is formed in the recording / reproducing head core 2, and a recording / reproducing gap 4 is formed in the erasing head core 3.
Erase gaps 5 are formed at positions corresponding to both ends of the erasure. The second head chip 6 has a narrow track width of about 41 μm, is formed of a magnetic circuit independent of the first wide track width head chip 1 by ferrite or the like, and forms a recording / reproducing gap 7 ( An erase gap can also be formed). Therefore, the recording / reproducing gap 7 is set to correspond to a track width narrower than the recording / reproducing gap 4 of the first wide track width head chip 1. The first wide track width head chip 1 and the second narrow track width head chip 6 have a support (slider) 8 made of a non-magnetic material such as ceramics interposed therebetween, and the same support (slider) from the outside. The first wide track width head chip 1 and the second narrow track width head chip 6 are held in a fixed state while being sandwiched between 9, 10 so as to slide in contact with the disk in a stable state. The recording / reproducing gap 7 is arranged so as to be separated from the recording / reproducing gap 7 of the first wide track width head chip 1 on the opposite side with respect to the disk access line. A recording / reproducing winding 11 is fitted to the recording / reproducing head core 2 of the first wide track width head chip 1, and an erasing winding 12 is fitted to the erasing head core 3. A recording / reproducing winding 13 is fitted to the second narrow track width head chip 6.

FIG. 2 is an enlarged explanatory view of a main portion showing a gap position on a disk in a direction perpendicular to the disk surface when two magnetic heads are combined and used as a so-called double-sided head.

In FIG. 2, 21 and 22 are a pair of magnetic heads of side 0 and side 1 configured as described above, 23 is a straight line passing through the center of the recording track of the disk and parallel to the seek direction.
The first wide track width head chip 1 and the second narrow track width head chip 6 of the magnetic head 21 on the side 0 and the first wide track width head chip 1 of the magnetic head 22 on the side 1 All of the second narrow track width head chips 6, that is, all the magnetic recording / reproducing gaps 4, 7 are arranged so that they do not overlap each other in the vertical position, and the proximity of each magnetic head 21, 22 as described above. The recording / reproducing gaps 4 and 7 of the first wide track width head chip 1 and the narrow track width head chip 6 are arranged so as to be separated from each other with the access line 23 interposed therebetween.

The operation of the above configuration will be described below.

The first wide track width head chip 1 and the second narrow track width head chip 6 in each of the magnetic heads 21 and 22 are configured as independent magnetic circuits, respectively, and have independent windings 1.
It has 1, 12, and 13, each of which can function independently to perform recording and reproduction. At this time, each magnetic head 2
The first wide track width head chip 1 and the second narrow track width head chip 6, which are paired in 1 and 22, are arranged close to each other. Are arranged so that they do not overlap in the vertical position, so that it is possible to prevent magnetic fluxes flowing through the respective magnetic circuits during recording and reproduction from leaking and interfering with each other. Also,
The location most likely to occur from the magnetic circuit of each head chip 1, 6 is near the gaps 4, 7.
And the recording / reproducing gaps 4 and 7 of the second head chips 1 and 6 are arranged so as to be separated from each other on the opposite side with the access line 23 interposed therebetween. It is possible to prevent the generated magnetic flux from entering the other recording / reproducing gap 7 or 4. Therefore, the recording / reproducing gap 4 or 7
The more leaked magnetic flux is applied to the other head chip 6 or 1
The magnetic circuit does not reach the recording / reproducing gap 7 or 4 of the other magnetic circuit, and returns directly, so that no return path is formed by linking with the winding 13 or 11. Therefore, it does not actually cause interference. By using the recording and reproducing gaps 4 and 7 having different track widths in this manner, recording and reproducing can be performed with different track widths, and by adjusting the currents of the recording and reproducing windings 11 and 13, different lines can be obtained. Recording and reproduction can be performed at the recording density.

As described above, according to the above-described embodiment, the dedicated head chips 1 and 6 can be operated for a plurality of recording / reproducing modes, so that the recording track width and the recording / reproducing gap are set for each recording / reproducing mode. Can be optimized. In addition, the erasing gap can be easily provided in the same manner, and the trim erase characteristic, the overwriting characteristic, and the like can be optimized. Furthermore, since magnetic interference does not occur even if a plurality of head chips are arranged in the vicinity as described above, a single flexible magnetic disk drive can be used to properly record a plurality of types of disks in a plurality of types of recording / reproducing modes. Recording and reproduction can be performed.

Effect of the Invention As described above, according to the present invention, a plurality of head chips which have recording / reproducing gaps having different track widths and form an independent magnetic circuit are integrally assembled.
Recording and reproduction with different track widths can be supported.
Therefore, recording and reproduction can be performed on a plurality of types of discs in a plurality of types of recording and reproduction modes. In particular, recording in a plurality of modes having different track widths, which has been impossible in the past, can be optimized and performed.

Further, gaps for recording / reproducing having different track widths are disposed so as to be separated from each other with respect to a straight line passing through the center of the recording track and parallel to the seek direction, and when combined as a pair of upper and lower, each constitutes a magnetic circuit. By arranging the head chips so that they do not overlap each other,
The respective head chips can be operated without magnetic interference with each other. Therefore, it is possible to improve the signal quality for the plurality of types of recording / reproducing modes.

Further, according to the present invention, as described above, even if the magnetic disk is recorded by a conventional magnetic head consisting only of a head having a wide track width, the arrangement of the magnetic head according to the present invention with respect to the access line can be improved. Since it is the same as the example, there is an effect that it can be easily read by the magnetic head according to the present invention.

[Brief description of the drawings]

1 and 2 show a magnetic head according to an embodiment of the present invention. FIG. 1 is a partially cutaway perspective view, FIG. 2 is an enlarged view for explaining the arrangement of a recording / reproducing gap, and FIG. FIG. 11 is a partially cutaway perspective view showing a conventional magnetic head. 1... A first wide track width head chip, 4... A recording and reproducing gap, 5... An erasing gap, 6... A second narrow track width head chip, 7.
8, 9, 10 ... Support, 11 ... Recording / reproduction winding, 12 ...
Erasing winding, 13 ... Recording / reproducing winding, 21, 22 ... Magnetic head.

Claims (1)

(57) [Claims] A plurality of head chips having recording / reproducing gaps having different track widths and constituting independent magnetic circuits are integrally assembled, and at least a head having a wide track width erases both sides of the track. The recording / reproducing gaps having different track widths are arranged so as to be separated from each other on opposite sides of an access line passing through the center of the recording track, and each head chip constituting the magnetic circuit is vertically A magnetic head which is combined as a pair and arranged so as not to overlap one another.