JP2000163710A - Magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve electromagnetic transducing characteristics by preventing the occurrence of ski jump. SOLUTION: This magnetic head is provided with a head supporting body whereon 1st and 2nd rails 11, 12 are formed on the surface opposite to a disk- like recording medium so as almost in parallel with the running direction of this disk-like recording medium, a 1st magnetic head element 9 for writing and/or reading a signal to and/or from the 1st disk-like recording medium while being provided on the head supporting body so that a magnetic gap is fronted onto the outside from the surface of the 1st rail 11 opposite to the disk-like recording medium, and a 2nd magnetic head element 10 for writing and/or reading the signal to and/or from the 2nd disk-like recording medium having the recording density higher than that of the 1st disk-like recording medium while being provided on the head supporting body so that the magnetic gap faces the outside from the surface of the 2nd rail 12 confronted with the disk-like recording medium, then a groove part 25 is formed on the surface of the head supporting body opposite to the surface whereon the 1st and 2nd rails are formed, and a coil is wound around the 2nd magnetic head element 10 in this groove part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for recording and / or reproducing data on a disk-shaped recording medium, and more particularly, to recording and reproducing data on a plurality of disk-shaped recording media having different recording densities. And / or a magnetic head for performing reproduction.

[0002]

2. Description of the Related Art A recording and / or reproducing apparatus for recording or reproducing a signal on a signal recording surface of a disk-shaped recording medium such as a flexible disk is widely used in personal computers, office computers, word processors and the like. The spread is remarkable.

[0003] Such a recording and / or recording apparatus includes a magnetic head device, which writes and / or writes signals to a mounted disk-shaped recording medium.
Or, reading is being performed.

In this magnetic head device, a pair of magnetic heads are mounted so as to be opposed to tips of two support arms, respectively, and a disk-shaped recording medium is sandwiched between the pair of magnetic heads to form a disk. Signal writing and / or reading is performed on the signal recording surface of the shape recording medium.

More specifically, as shown in FIG. 10, for example, a magnetic head device 201 includes a pair of support arms 202 supported on a base end side, and a pair of these support arms 202.
And a pair of magnetic heads 204 disposed on the respective gimbals 203 so as to face each other. In the magnetic head device 201, the gimbal 203 supports the magnetic head unit 204 by, for example, supporting a surface opposite to the surface on which the magnetic head unit 204 is disposed at a single point by a pivot. Following the displacement of
Stable recording and reproduction can be performed.

A disk-shaped recording medium 206 on which recording and reproduction is performed by such a recording and / or reproducing apparatus is generally provided with a cartridge 20 for the purpose of protecting a signal recording surface.
5 and mounted on a recording and / or reproducing apparatus.

The cartridge 205 has a magnetic head entry opening 207 formed therein. When recording and reproduction are performed on the disk-shaped recording medium 206 using the magnetic head device 201, the magnetic head device 201 has The magnetic head unit 204 enters the cartridge 205 through the entry opening 207, and performs recording and reproduction on the disk-shaped recording medium 206 in the cartridge 205.

In recent years, a large-capacity flexible disk having a larger storage capacity than a commercially available flexible disk has been proposed. This large-capacity flexible disk has the storage capacity dramatically increased from 1 MB or 2 MB of the conventional flexible disk to several tens MB to several hundred MB while keeping the same external dimensions and the like as the conventional flexible disk.

The magnetic head portion of the magnetic head device that performs recording and reproduction on such a large-capacity flexible disk can perform recording and reproduction on a conventional flexible disk from the viewpoint of convenience and the like. However, it has been proposed to use a magnetic head that performs recording and reproduction on a large-capacity flexible disk.

[0010] Such a magnetic head comprises an upper magnetic head element for writing or reading a signal in a higher-order mode on a large-capacity flexible disk and a higher-order magnetic head element for writing or reading a signal in a lower-order mode on a conventional flexible disk. And a lower magnetic head element for performing the operation.

More specifically, as shown in FIG. 11, the magnetic head includes a slider member 210 having first and second rails 211 and 212 formed substantially in parallel with a running direction of a flexible disk. The slider member 21 is moved so that the magnetic gap faces the outside from the medium facing surface of the rail 211.
0, and an upper magnetic head element 214 attached to the slider member 210 such that the magnetic gap faces the outside from the medium facing surface of the second rail 212.

In this magnetic head, when a large-capacity flexible disk is mounted in the recording and / or reproducing apparatus, the slider member 210 floats on the mounted large-capacity flexible disk with a predetermined flying height. Meanwhile, the upper magnetic head element 214 writes or reads signals to or from this large-capacity flexible disk.

In addition, when a conventional flexible disk is mounted in a recording and / or reproducing apparatus, the slider member 210 slides on the mounted conventional flexible disk while lowering the magnetic head. The magnetic head element 213 writes or reads a signal to or from the conventional flexible disk.

In such a magnetic head, a metal-in-gap type magnetic head (hereinafter, referred to as a MIG head) having an alloy film having a high saturation magnetization disposed in the vicinity of a magnetic gap is provided as an upper magnetic head element. Used.

[0015]

In the above-mentioned conventional magnetic head, it is necessary to adjust the relative positional relationship between the running flexible disk and the magnetic head element, that is, the so-called hit, in order to obtain good electromagnetic conversion characteristics. There is. Therefore, in the magnetic head, the first and second rails 21 formed on the slider member 210 are formed in order to improve the contact with the flexible disk.
The medium facing surfaces 1 and 212 have a substantially arc shape in the running direction of the flexible disk.

In the conventional magnetic head, FIG.
As shown in FIG. 2, a coil winding groove 215 is formed so as to cross the side surface of the slider member 210, and the coil 216 is wound around the upper magnetic head 214 in the coil winding groove 215. .

However, in the conventional magnetic head, since such a coil winding groove 215 is formed on the side surface of the slider member 210, the upper magnetic head element 214 of the slider member 210 shown in FIG. The thickness B in the vicinity becomes thin, and the upper magnetic head element 2
The strength near 14 decreases.

For this reason, in the conventional magnetic head,
When the coil 216 is wound around the upper magnetic head element 214, the upper magnetic head element 2
14, the second rail 212 formed on the slider member 210 is deformed and lifted.
There is a problem that a so-called ski jump occurs.

When such a ski jump occurs in the magnetic head, the contact with the traveling flexible disk becomes poor and a predetermined flying height cannot be obtained, so that good electromagnetic conversion characteristics can be obtained. Can not.

Further, when the thickness of the magnetic head is reduced, the upper magnetic head element 21 of the slider member 210 is removed.
Since the thickness B in the vicinity of 4 becomes thinner, the occurrence of ski jump becomes more remarkable.

Accordingly, the present invention has been proposed in view of such a conventional situation, and an object of the present invention is to provide a magnetic head having good electromagnetic conversion characteristics by preventing occurrence of ski jump. And

[0022]

A magnetic head according to the present invention for achieving the above object has a first and second magnetic heads on a surface facing a disk-shaped recording medium in a direction substantially parallel to a running direction of the disk-shaped recording medium. A head support on which a rail is formed, and a magnetic gap provided on the head support such that a magnetic gap faces the outside from a surface of the first rail facing the disk-shaped recording medium, and a signal is supplied to the first disk-shaped recording medium. Writing and / or
Alternatively, a first magnetic head element for reading and a magnetic gap are provided on a head support such that a magnetic gap faces the outside from a surface of the second rail facing the disk-shaped recording medium, and is higher than the first disk-shaped recording medium. A second magnetic head element for writing and / or reading signals to and from a second disk-shaped recording medium having a high recording density; and a surface of the head support on which first and second rails are formed. Is characterized in that a groove is formed on the opposite surface, and a coil is wound around the second magnetic head element in this groove.

According to the magnetic head of the present invention having the above-described structure, the strength of the head support near the second rail is hardly reduced, and when the coil is wound around the second magnetic head element. The occurrence of ski jump is prevented.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example in which the magnetic head according to the present invention is used as a magnetic head unit of a magnetic head device for writing and / or reading signals to and from two types of flexible disks having different storage densities.

As shown in FIG. 1, the magnetic head device has a pair of support arms 1 and spacer members 2 respectively attached to tip portions 1a of the pair of support arms 1.
A gimbal 3 provided on the spacer member 2 and a magnetic head 4 attached to the gimbal 3
And In this magnetic head device, the spacer member 2
And a magnetic head 4 constitute a magnetic head section 4A. In this magnetic head device, a pair of head units 4
A pair of support arms 1 are arranged such that A faces each other.

The magnetic head device writes and / or reads signals to and from the flexible disk 6 rotatably accommodated in the cartridge 5. At this time, the cartridge 5 is formed with an opening 7 having an opening dimension enough for the magnetic head device to enter. Therefore, when performing recording and reproduction on the flexible disk 6 using this magnetic head device, as shown in FIG. 1, the pair of magnetic heads 4A enter from the opening 7 and
A pair of magnetic heads 4 constituting the magnetic head unit 4A sandwich the flexible disk 6, and write and / or read signals to and from the flexible disk 6.

As shown in FIG. 2, the magnetic head 4 includes a slider member 8, a first magnetic head element 9, and a second magnetic head element 10.

The slider member 8 is provided on the surface facing the flexible disk 6 with the first and second rails 1 substantially parallel to the running direction of the flexible disk 6 indicated by the arrow A in the figure.
1 and 12 are formed. Front tapers 11a and 12a are formed on the first and second rails 11 and 12 on the leading end side of the flexible disk 6, respectively, and rear tapers 11b and 12b are formed on the leading end side of the flexible disk 6 respectively. Is formed. The front tapers 11a and 12a are formed at an angle of about 1 ° with respect to the surface of the flexible disk 6, for example. The rear tapers 11b and 12b are formed at an angle of about 20 ° with respect to the surface of the flexible disk 6, for example.

The first magnetic head element 9 is attached to the slider member 8 such that the magnetic gap faces the outside from the surface of the first rail 11 facing the flexible disk 6.

The first magnetic head element 9 is a so-called tunnel erase head, and is a write / reproduce magnetic head (hereinafter referred to as a read / write head) arranged near substantially the center of the first rail 11 in the longitudinal direction. 9a)
And a magnetic head for erasing (hereinafter, referred to as an erase head 9b) disposed downstream of the read / write head 9a in the traveling direction A of the flexible disk 6. The read / write head 9a has a magnetic gap G1 slightly larger than the track width of the recording track.
The erasing head 9b is composed of the read / write head 9
The magnetic gap G2 is located downstream of the magnetic gap G1 and at both ends in the width direction of the magnetic gap G1.

The first magnetic head element 9 has a read / write
Recording is performed on the flexible disk 6 by the magnetic gap G1 of the write head 9a. Then, both ends of the written recording track in the width direction are erased by a predetermined amount by the magnetic gaps G2 and G3 of the erase head 9b, so that the track width of the recording track formed on the flexible disk 6 becomes a predetermined value. Be regulated.

The magnetic head 4 uses the first magnetic head element 9 to record data in the lower mode on the first flexible disk 6a having a low recording density among the two types of flexible disks 6 described above. And / or perform playback. At this time, the magnetic head 4 slides on the signal recording surface of the first flexible disk 6a, and the first flexible disk 6a is moved by the first magnetic head element 9.
Signal writing and / or reading.

The second magnetic head element 10 is mounted on the slider member 8 such that the magnetic gap faces the outside from the surface of the second rail 12 facing the flexible disk 6.
Is attached.

The second magnetic head element 10 is a so-called MIG head. As shown in FIG. 3, a metal magnetic film 15 is formed on the abutting surfaces of a pair of magnetic core halves 13 and 14. The magnetic gap G4 is formed by the butting surfaces of the pair of magnetic core halves 13 and 14 abutting each other via the nonmagnetic film 16.

The magnetic core halves 13 and 14 are composed of magnetic core substrates 17 and 18 as auxiliary cores and a metal magnetic film 15 as a main core.

The magnetic core substrates 17 and 18 are made of, for example, Mn-
It is made of a soft magnetic oxide material such as Zn-based ferrite or Ni-Zn-based ferrite, and serves as an auxiliary core that forms a closed magnetic circuit together with the metal magnetic film 15. Magnetic core substrate 17,
Reference numeral 18 denotes grooves 20 and 21 which form a winding window 19 after abutment, while restricting the depth of the magnetic gap G4 at substantially central portions on the main surface side opposed to each other. Further, on both side surfaces of the magnetic core substrates 17 and 18, a contact width regulating groove 22 for adjusting a contact width with the traveling flexible disk 6 is formed substantially parallel to the traveling direction A of the flexible disk 6. .

The metal magnetic film 15 is made of an alloy film having a high saturation magnetization, for example, a metal magnetic material containing Fe. The metal magnetic film 15 is to be a main core that forms a closed magnetic circuit together with the magnetic core substrates 17 and 18, and is formed on the butted surfaces of the magnetic core substrates 17 and 18.

The non-magnetic films 16 are made of a non-magnetic material such as SiO ₂ , and are formed on the metal magnetic thin films 15 respectively. In this case, the magnetic gaps G4 are formed by abutting the magnetic core halves 13 and 14 via the nonmagnetic film 16.

The magnetic head 4 uses the second magnetic head element 10 to perform recording and recording in the upper mode on the second flexible disk 6b having a high recording density among the two types of flexible disks 6 described above. And / or perform playback. At this time, while the magnetic head 4 is floating on the signal recording surface of the second flexible disk 6b by a predetermined floating amount, the second magnetic head element 10 writes a signal to the second flexible disk 6b. And / or read.

When forming the magnetic head 4 as described above, first, as shown in FIG. 4, a slider member 8 is prepared.

The slider member 8 is formed in a substantially rectangular shape, and a fusing glass 23 for bonding the first magnetic head element 9 is provided on a side surface portion 8a that comes into contact with the first magnetic head element 9. Embedded. The slider member 8 has a notch 24 for fitting the second magnetic head element 10 and a coil winding groove 25 for winding a coil around the second magnetic head element 10. are doing.

The notch 24 is formed in a portion of the second rail 12 which becomes the rear taper 12b so as to penetrate the slider member 8 in the vertical direction.

The coil winding groove 25 is formed on the bottom 8b of the slider member 8 opposite to the surface on which the first and second rails 11 and 12 are formed.
It is formed so that the side surface part 8c opposite to a may be cut out. The groove 25 for the coil winding is provided with the second
The second magnetic head element 10 is formed so that the winding window 19 of the magnetic head element 10 faces when the magnetic head element 10 is fitted.

Further, the bottom of the coil winding groove 25 is formed as an inclined surface, and is formed up to an intermediate portion in the width direction of the slider member 8. In this case, the coil 27 can be easily wound around the second magnetic head element 10 by making the bottom of the coil winding groove 25 an inclined surface.

Next, as shown in FIG.
The first magnetic head element 9 is brought into contact with the fused glass 23 embedded in the side surface 8a of the second magnetic head element 10a.
Is inserted into the notch 24, a glass rod 26 is disposed on the side of the magnetic gap G4 of the second magnetic head element 10, and the fused glass 23 and the glass rod 26 are melted. The head element 9, the second magnetic head element 10, and the slider member 8 are joined and integrated.

Next, rail processing for forming the first and second rails 11 and 12 is performed on the surface of the joined and integrated slider member 8 facing the flexible disk 6. Also, the front taper 11 is attached to the slider member 8.
The magnetic head 4 as shown in FIG. 2 is formed by performing a taper process for forming the a and 12a and the rear tapers 11b and 12b and a polishing process for obtaining a desired gap depth. .

In the magnetic head 4, first and second rails 11, 1 are provided on a surface facing the flexible disk 6.
2, an air film is formed between the flexible disk 6 and the flexible disk 6 which is rotated when performing recording and reproduction in the upper mode.
It is possible to levitate at a predetermined flying height above.

According to the magnetic head 4 according to the present invention configured as described above, as shown in FIG.
A groove 25 for coil winding is formed on the bottom 8b opposite to the surface on which the first and second rails 11 and 12 are formed. In the groove 25 for coil winding, a second magnetic head element is formed. The coil 27 is wound around 10.

Therefore, in the magnetic head 4, the strength of the slider member 8 in the vicinity of the second magnetic head element 10 is hardly reduced, and the ski jump when the coil 27 is wound around the second magnetic head element 10 is reduced. Occurrence can be prevented.

Therefore, the magnetic head 4 according to the present invention
Can maintain good contact with the traveling flexible disk 6 and can obtain good electromagnetic conversion characteristics.

Here, when the head shape of the magnetic head 4 was measured, as shown in FIG. 7, the surfaces of the first and second rails 11 and 12 facing the flexible disk 6 were
The required head shape is a substantially crown shape of 50 nm or less, which is an ideal head shape. In this case, the magnetic head 4 can obtain a predetermined flying height and obtain good electromagnetic conversion characteristics.

Conversely, when the head shape of the conventional magnetic head was measured, as shown in FIG. 8, the surfaces of the first and second rails 11 and 12 facing the flexible disk 6 did not have a substantially crown shape. Instead, a ski jump has occurred. In this case, the magnetic head cannot obtain a predetermined flying height and cannot obtain good electromagnetic conversion characteristics.

In the conventional magnetic head, when the thickness of the magnetic head is reduced, the thickness B of the slider member 8 in the vicinity of the second magnetic head element 10 shown in FIG. The occurrence is even more pronounced.

On the other hand, the magnetic head 4 according to the present invention
According to this, for example, the thickness of the magnetic head portion is set to, for example, 0.5 m.
Even when m is set, no ski jump occurs and the magnetic head can be made thinner.

In FIGS. 7 and 8, the head shape is measured, and the scale is provided as a measure of the size.

The second magnetic head element 10 may have a configuration in which a winding guide groove 28 is formed on the side opposite to the magnetic gap G4, as shown in FIG.

[0057]

As described above in detail, according to the magnetic head of the present invention, the groove is formed on the bottom of the head support opposite to the surface on which the first and second rails are formed. Since the coil is wound around the second magnetic head element in the groove, the strength of the head support near the second rail is not significantly reduced, and the coil is wound around the second magnetic head element. In this case, it is possible to prevent a ski jump from occurring, and to obtain good electromagnetic conversion characteristics.

According to the magnetic head of the present invention, the thickness of the magnetic head can be further reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a configuration of a magnetic head device using a magnetic head according to the present invention.

FIG. 2 is a perspective view showing a configuration of the magnetic head.

FIG. 3 is a perspective view showing a configuration of a second magnetic head element constituting the magnetic head.

FIG. 4 is a perspective view showing a configuration of a slider member constituting the magnetic head.

FIG. 5 is an exploded perspective view showing a manufacturing process of the magnetic head.

FIG. 6 is a perspective view showing a state where a coil is wound around the magnetic head.

FIG. 7 is a view showing a measurement of a head shape of the magnetic head.

FIG. 8 is a diagram illustrating a measured shape of a conventional magnetic head applied for comparison.

FIG. 9 is a perspective view showing another configuration of the second magnetic head element constituting the magnetic head according to the present invention.

FIG. 10 is a sectional view of a main part showing a configuration of a magnetic head device using a conventional magnetic head.

FIG. 11 is a perspective view showing a configuration of the magnetic head.

FIG. 12 is a perspective view showing a state where a coil is wound around the magnetic head.

[Explanation of symbols]

Reference Signs List 4 magnetic head, 6 flexible disk, 8 slider member, 9 first magnetic head element, 10 second magnetic head element, 11 first rail, 12 second rail, 25 coil winding groove, 27 coil

Claims (4)

[Claims] 1. A head support having a first rail and a second rail formed on a surface facing a disk-shaped recording medium substantially parallel to a running direction of the disk-shaped recording medium; A first magnetic head element provided on the head support so as to face the outside from a surface of the rail facing the disk-shaped recording medium, and for writing and / or reading signals to and from the first disk-shaped recording medium; A second disk having a higher recording density than the first disk-shaped recording medium, wherein a magnetic gap is provided on the head support so as to face the outside from a surface of the second rail facing the disk-shaped recording medium; A second magnetic head element for writing and / or reading a signal to and from the magnetic recording medium, and a side of the head support opposite to a surface on which the first and second rails are formed. A magnetic head characterized in that a groove is formed on the surface of the second magnetic head element, and a coil is wound around the second magnetic head element in the groove. 2. The groove portion is formed in the thickness direction of the second magnetic head element, and the second magnetic head element is formed on the head support so that a winding window faces the groove portion. The magnetic head according to claim 1, wherein the magnetic head is provided. 3. The magnetic head according to claim 2, wherein a bottom portion of the groove portion is formed as an inclined surface, and is formed up to an intermediate portion in a width direction of the head support. 4. The first magnetic head element according to claim 1, wherein
Writing and / or reading signals to and from the first disk-shaped recording medium in contact with the signal recording surface of the disk-shaped recording medium; 2. The magnetic head according to claim 1, wherein a signal is written and / or read from / to the second disk-shaped recording medium while floating from a signal recording surface of the recording medium.