JPS6047218A - Magnetic head - Google Patents

Abstract

PURPOSE:To attain ease of recording even to a recording medium having a high track density without any danger of off-track at all by providing a head main body of a magnetic substance having a series of ring group on the circumference, a magnetic material connected respectively to each circumference between the groups, >=1 of magnetic generating means and a means connecting magnetically the magnetic generating means of a couple of adjacent optional magnetic substances. CONSTITUTION:A magnetic head 10 has a cylindrical magnetic substance main body 11 and plural ring groups 12 are provided to an outer circumference with a prescribed interval. A corresponding magnetic material 14 is connected to a main body circumferential face 13 between the groups 12. Each magnetic substance 14 is connected magnetically to the magnetic generating means 16 by a conventional switching circuit 15. A conventional type magnetism generating means 16 comprising a magnetic core 17 and a coil 19 connected to a current source 18 and wound around the core 17 may be favorably used. The switching circuit 15 connects magnetically magnetic pole terminals 21, 22 of the magnetic core 17 to a couple of optional adjacent magnetic substances 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head, and more particularly to a magnetic head having a plurality of magnetization means in a single head.

Recording is performed on a magnetizable medium such as a magnetic tape or a floppy disk, and a magnetic head is used in step 5. A conventional magnetic head consists of a single magnetic core and a coil wound around the magnetic core. In recent years, magnetic recording with high recording density has been required due to the development of perpendicular magnetization systems and the development of floppy disks.

For example, in a typical floppy disk, the interval between recording tracks is extremely small, 28 inches (about 0.529 mm). When performing magnetic recording on a floppy disk using a conventional magnetic head, the magnetic head is positioned on a desired recording track by moving the magnetic head in the radial direction of the disk using a feed device using a lead screw.

However, due to manufacturing errors caused by the lead screw, adjustment errors of the magnetic head by τ1, and extremely narrow track spacing, the so-called ``off-l-rack'' positioning of the recording head versus the recording l-rack is difficult. 11. The present invention eliminates the above-mentioned conventional drawbacks and provides a magnetic spatula 1 with a simple structure. ! The purpose is to provide.

According to the present invention, a head body made of a magnetic material having a series of annular groups on the circumferential surface, a magnetic material connected to each circumferential surface between each group, one or more magnetism generating means, and an adjacent arbitrary one A magnetic head comprising a means for magnetically connecting a magnetism generating means to a pair of magnetic materials is provided. It has a magnetic body 11, and a plurality of annular groups 12 are provided at predetermined intervals on the outer peripheral surface of the magnetic body 11. A corresponding magnetic material 14 is connected to the peripheral surface 1 of the main body between each group 12. In the case of a fixed head, the main body circumference 1
It is sufficient to fix the magnetic material 14 to the peripheral surface 16 and the magnetic material 1 using a contact brush (not shown) in the case of a rotating head.
It is recommended to connect 4.

Each magnetic material 14 is controlled by a known switching circuit 15.
It is magnetically connected to the magnetism generating means 16. The magnetism generating means 16 may be of the known type consisting of a magnetic core 17 and a coil 19 wound around it and connected to a current source 18. The switching circuit 15 is connected to the magnetic pole terminals 21 and 22Y of the magnetic core 17.
It is magnetically connected to any pair of adjacent magnetic materials 14, and may be an analog switching circuit controlled by a pulse counter, for example.

FIG. 2 shows a magnetic spatula 1!20 according to another embodiment of the present invention.
shows. In this embodiment as well, the peripheral surfaces 1 and 3 of the main body between each group 12 are connected to the corresponding magnetic material 14, but instead of the switching circuit 150, a sliding type magnetism generating means 16 is used. That is, one end of the magnetic material 14 is connected to the main body circumferential surface 13, and the other end of the magnetic material 14 is held on the support body 2 at an interval that is sufficiently wider than the interval between the groups, and the magnetic material 14 is connected to the magnetic generating device using a feeding device 24 such as an ordinary lead screw. By sliding the magnetic generator 16 from side to side on the support 2, the magnetic generator 16
It is connected to any pair of magnetic materials 14 that are adjacent to each other.

The advantage of this case is that the density of the tracks to be recorded is high, and even if the interval between the groups is made extremely narrow, the interval between the magnetic terminals on the support 2 is wide, so there is no error in the lead screw, etc. I also had to worry about going off track (which I don't have).

The main body 11 of the magnetic head 10 may be formed by fitting a plurality of magnetic rings 26 at equal intervals around a central core 25, as shown in FIG. In this case, the gap 27 formed between the rings 26 corresponds to the annular group 12, and the ring outer peripheral surface 28 corresponds to the main body peripheral surface 13. Further, although not shown in the drawings, the head main body 11 may be formed of a cylindrical body, and the groups 12Y may be provided on the circumferential surface of the head main body 11.

Next, the operation of recording on a floppy disk using the magnetic head 60 according to the embodiment shown in FIGS. 4 and 5 will be explained. The magnetic head 60 shown in FIGS. 4 and 5 has a diagonal-shaped head body 61 made of magnetic material, and the recording track 41 on the floppy disk 40 is formed on the circumferential surface of the head body 61, similar to the one shown in FIG. Annular groups 62 are provided corresponding to the number, and the main body peripheral surface 66 between each group is covered with a corresponding magnetic material 1.
4. It is connected to magnetism generating means 16 via a switching circuit 15, similar to that shown in FIG. 1 (the switching circuit and magnetism generating means are not shown in FIGS. 4 and 5). The magnetic head 60 is positioned close to the floppy disk 40 and held stationary appropriately.

For example, when recording and reproducing on the recording track 41a (FIG. 4) of a floppy disk, this track 41a (FIG. 4)
Main body peripheral surfaces 33a on both sides of group 32a corresponding to a
, 33b, a pair of magnetic materials 14a, 14b are connected to the magnetic field generating means 16 by the Y switching circuit 15 (FIG. 1).
Connect to. Then, opposing magnetic poles (N, S poles) are generated on both sides of the group 32a, forming a magnetic head section, and thus magnetic recording and reproduction of the track 41a is performed. Next, when performing recording/reproduction on the recording track 41b, the switching circuit 15 is appropriately switched to connect the pair of magnetic materials 14 d+ 14 e f connected to the circumferential surfaces of the main body on both sides of the group 32b corresponding to the track 41b. If it is magnetically connected to the generating means 16, recording and reproduction can be performed on the track 41b. In this way, by magnetically energizing the main body peripheral surfaces on both sides of the annular group 32 corresponding to any recording track 41, recording can be performed on that track. Once positioned, the magnetic head 60 does not need to be moved in the radial direction of the floppy disk each time a track 41 is recorded, so there is no need to worry about off-track.

When recording is performed by bringing a floppy disk into contact with a magnetic head, the head 30 is made rotatable around its own axis 64, and the circle of the head 60 is adjusted so as to match the peripheral speed of rotation of the recording tran 2410 on the disk 40. All you have to do is choose the fu and center angle appropriately.

It goes without saying that the magnetic spatula 1 of the present invention is capable of recording and reproducing not only floppy disks but also any magnetic tape.

Due to the above configuration, the magnetic head 1 of the present invention can be turned off and off.
Since it is possible to easily record even on a recording medium with a high track density without any danger of tracks, it is most suitable for carrying out the perpendicular magnetization method.

[Brief explanation of the drawing]

FIG. 1 shows a magnetic head according to a first embodiment of the present invention. FIG. 2 is a partial sectional view showing a magnetic head 2 according to a second embodiment of the present invention. FIG. 6 is a partial sectional view of the head body of a magnetic head according to a sixth embodiment of the present invention. FIG. 4 shows the fourth embodiment of the present invention.
FIG. 3 is a diagram showing a head main body portion of a magnetic head according to an embodiment. FIG. 5 is a schematic plan view showing the relationship between a magnetic head according to a fourth embodiment of the present invention and a floppy disk recorded by the magnetic head. 10.20. Ro 0: Magnetic head 11: Spatula 1-' main body 12: Annular gusset 1 Ro:
Main body circumferential surface 14: Magnetic material 15 Niswitching circuit 16: Magnetism generating means patent application filed Toshi Nikawa (and 4 others)

Claims (1)

[Claims] A head body made of a magnetic material having a series of annular groups on the circumferential surface, a magnetic material connected to each circumferential surface between each group, one or more magnetism generating means, and a pair of adjacent magnetic materials selected as the magnetism generating means. A magnetic spatula is characterized in that it is provided with a means for magnetically connecting it to a magnetic spatula. .