JP2922671B2 - Magnetic head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device used for a magnetic disk device, a flexible disk device and the like.

[0002]

2. Description of the Related Art FIG. 9 is a schematic diagram showing a conventional magnetic head device disclosed in, for example, Japanese Patent Application Laid-Open No. 62-28913. In FIG. 1, reference numeral 1 denotes a slider, which has tracks formed on a recording medium at a high density.
(Hereinafter, abbreviated as “ high track head ”) 2 (hereinafter, abbreviated as “ high track head ”) 2 and a low density formed on a recording medium.
Track (hereinafter abbreviated as "low track")
(Hereinafter abbreviated as “ low track head ”) 3. A recording medium 4A or 4B is located below the slider 1, and a low track 5 formed at a low density is provided on the surface of the recording medium 4A. A high track 6 formed at high density is provided on the surface of the recording medium 4B. Reference numeral 7 denotes magnetic interference between the high track head 2 and the low track head 3 (hereinafter referred to as " crosstalk " ). Furthermore, T _WU is high track head 2 in the track width, T _WL denotes the track width of the low track head 3, further T _PU track pitch of a high track density of the recording medium 4B, T _PL is a low track density track pitch of the recording medium 4A, T ₁ is the distance between the high track head 2 low track head 3, T
_WA indicates the interval between the low tracks 5 on the recording medium 4A.

Next, the operation of the magnetic head device configured as described above will be described. The conventional slider 1 includes, for example, a high-track head 2 and a low-track head 3 having different track densities so that recording and reproduction can be performed on a plurality of recording media 4A and 4B having different track densities.
And a plurality of head chips, each of which can operate independently in accordance with the disc standard.

For positioning the slider 1, for example, a stepping motor or the like is employed. To send the high track head 2 to an arbitrary high track 6, it is performed, for example, in units of one pulse. Is sent to an arbitrary low track, the head is positioned by a mechanical step feed or the like, for example, in a unit of two pulses.

The positions of the low track 5 and the high track 6 of the recording media 4A and 4B are determined by, for example, device standards. Therefore, due to the feed pitch of a stepping motor or the like for positioning the slider 1, the high track head 2 may be positioned on the low track 5 while the low track head 3 is operating.

[0006]

Since the conventional magnetic head device is constructed as described above, the low-track head 3 records the signal of the low-track 5A and the high-track head 2 separates during the recording / reproducing operation. When the recording signal is applied to the low-track head 3 at the time of recording, for example, when the recording signal is applied to the low-track head 3B, a part of the recording signal leaks into the high-track head 2 due to crosstalk 7. As a result, a signal is also recorded on a low track 5B different from the low track 5A on which a signal is to be originally recorded, thereby adversely affecting the original data of the low track 5B. When the low-track head 3 reproduces the data of the low-track 5A, the high-track head 2 reproduces the data of the low-track 5B. Leak into As a result, the data is superimposed on the data of the low track 5A reproduced by the low track head 3 and an error occurs.

SUMMARY OF THE INVENTION The object of the present invention was made in view of the above-mentioned problems. While a low-track head is operating, a high-track head records data on another low-track and adversely affects the data. It is an object of the present invention to provide a magnetic head device capable of reliably preventing reproduction from causing an error.

[0008]

According to the first aspect of the present invention, there is provided the following:
Formed on one surface of the recording medium (13) of low density
First rack head (low track head 11)
Having a high density on one surface of the second recording medium
Head (high-track head)
In the magnetic head device provided with the slider (12) having the above (10), during the recording / reproducing operation of the first recording medium with the first head, the second head is driven by the first head . Record
Tracks and tracks formed on one side of the recording medium with low density
It was arranged so that it might be located corresponding to between the guards (guard band) .

According to a second aspect of the present invention, the first recording medium (1
8) The first low-density truck track on one side
Head (low-track head 19A), and
A track formed on one surface of the second recording medium at a high density
A second head (high-track head 20A) for
One or more first sliders (21),
A track formed on the other surface of the first recording medium at a low density.
1st head (low track head 19B)
And formed on the other surface of the second recording medium at a high density.
The second head for the lifted track (high track head 2
In the magnetic head device provided with a second slider (22) one or more with 0B), the first or second slide
Recording / reproducing operation of the first recording medium with the first head
During operation, the second head is paired with the operating first head.
The low density formed on the surface of the first recording medium facing
It was arranged so as to correspond to the position between the rack and the track (guard band) .

[0010]

According to a first aspect of the present invention, in a slider having a plurality of head chips having different track densities, a slider for a low track as a first head is used as a second head during a recording / reproducing operation. high track head is formed in the low density on one surface of the first recording medium
Between the tracks, ie, corresponding to the guard band . This prevents the head for the high track from being located on the low track while the head for the low track is operating, and therefore, crosstalk may adversely affect data on another track, or the reproduction of the head for the low track may occur. The occurrence of data error is reliably prevented.

[0011] In the second invention, in the slider a plurality magnetic head is opposed via a recording medium having a plurality of different head chips of track density, the
During a recording / reproducing operation with the low track head as the first head, the high track head as the second head moves .
Of the first recording medium to which the low track head being
Immediately between tracks with low density formed on the surface
In addition, it is located corresponding to the guard band . This prevents the head for the high track, which is opposed to the head for the low track, from being located on the low track during operation, and the crosstalk between the heads that face each other causes
It is possible to reliably prevent the data on the low track on the opposing surface from being adversely affected or causing an error in the data reproduced by the low track head.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 is a schematic configuration diagram showing one embodiment of a magnetic head device according to the present invention. This magnetic head device
A high-track head 10 for performing recording and reproducing operations on high-track and low-track having different track densities, respectively;
In the slider 12 having a low track head 11, the pitch T between the low track 14 and the distance T _1, which is formed on the recording medium 13 to the low density between the high track head 10 and the low track head 11 _When the low track head 11 is recording / reproducing the low track 14 of the recording medium, the high track head 10 is moved to the guard band of the recording medium 13, that is, each low track 14.
It is arranged so as to be located corresponding to between the two.
The low track 14 is provided on the surface of the recording medium 13 so as to extend in the circumferential direction at a predetermined interval.

The distance T ₁ between the high track head 10 and the low track head 11 is
The distance from the center of the track width T _{WU to} the center of the track width T _WL of the low track head 11 is set within the range of the following expression. The head 10 is configured so as to be positioned between the guard bands of the recording medium 13, that is, between the low tracks 14.

[0015]

(Equation 1)

In the equation (1), n is an arbitrary integer.

Next, the operation of the magnetic head device will be described. For example, in the slider 12 in which the high-track head 10 and the low-track head 11 are integrated, the high-track head 10 is generally smaller than the low-track head 11 because the high-track head 10 is smaller than the low-track head 11. 11 greatly affects the crosstalk,
This improvement is important. Therefore, the high track head 1
By arranging the distance T ₁ between 0 and the low-track head 11 within the range of the above equation, when the low-track head 11 performs a recording / reproducing operation on an arbitrary low track 14, the high-track head 11 Head 10 is always low track 1
4 and is located in a no-signal area (guard band) where no data is recorded.

Therefore, even when the recording signal leaks to the high track head 10 due to the crosstalk 15 during the recording of the low track head 11, the high track head 10 is not positioned on the low track 14, Track 1
There is no adverse effect such as rewriting or demagnetizing the data of No. 4. Further, even when the low-track head 11 is being reproduced, the high-track head 10 does not reproduce the data of the other low-track 14, so that the crosstalk 15 does not occur, which may cause an error. Nothing.

In the case of positioning the high-track head 10, the positioning of the high-track head 10 can be arbitrarily changed by using a linear stepping motor or a voice coil motor, for example, instead of the conventional mechanical positioning using a stepping motor. By doing so, even in the arrangement configuration of the high track head 10 in the present embodiment, positioning can be performed without any damage compared to the related art. Also, while the high-track head 10 is performing the recording / reproducing operation on the high track of the recording medium, the low-track head 11 is positioned on the high track and crosstalk occurs. In general, a high-density recording device performs error compensation using error correction such as ECC.
The influence of crosstalk on the reproduction data is small.

FIG. 2 is a diagram showing another embodiment of the magnetic head device according to the present invention. That is, the first embodiment described above shows a magnetic head device in which the high-track head 10 and the low-track head 11 provided on the slider 12 are close to each other, as in the prior art. the head 10 lower track head 11 is positioned at a predetermined distance T _1. Since the crosstalk 15 In such a slider 12 may occur, the high track head 10 of the distance T ₁ of the between low track head 11 is in the range of the formula in Formula 1,
By arranging the high-track head 10 so as to be in the guard band of the recording medium 13, the same effect as in the first embodiment described above is obtained.

Further, in each of the embodiments described above, only the recording / reproducing head is illustrated for convenience of explanation, but as shown in FIG.
For example, even when the present invention is applied to a composite type magnetic head device having an erase head 16 used for preceding erase, tunnel erase, and the like, the same effects as those of the above embodiment can be obtained. In addition,
2 and 3, the recording medium 13, the low track 14, and the T
_WU and _TWL are the same as those in FIG.

FIG. 4 is a schematic configuration diagram of a magnetic head device according to the second aspect of the present invention. This magnetic head device comprises a recording medium 18 having low tracks 17A and 17B provided on both sides thereof so as to extend in the circumferential direction at predetermined intervals, and a low track head 1 corresponding to the low tracks 17 on both sides.
The configuration includes two sliders 21 and 22 having heads 9A and 19B and high-track heads 20A and 20B. That is, the present magnetic head device is a slider 21, 22 through the recording medium 18 is opposed, serial to each other
The sliders 21 and 22 facing each other via the recording medium 18
The high track head 20A and the low track head 1
Lateral offset distance T _{2 (or} high truck heads between 9B
Lateral deviation between the head 20B and the low track head 19A
The distance T ₂ ) is specified, and the low track head 19B operates.
The high track head 20A (or the low track head
While the head 19A is in operation, the high track head 20B
Is arranged so as to correspond to the guard band of the recording medium 18.

The lateral displacement distance T between the heads
₂ is the track width T _WU of the high track head 20A .
Track width T _WL of low track head 19B from center
To the center of the head (or the head of the high-track head 20B).
From the center of the rack width T _{WU to} the head for low track 19A.
The distance) to the center of the track width _{T WL,} high track head opposite from the low track 17 A, 17 low truck head 19B between B of each side of the recording medium 18 20
Let X be the shift in the A direction and be within the range of the following equation.

[0024]

(Equation 2)

In the equation (2), n is an arbitrary integer.

[0026] In this manner, in the present embodiment, high-tiger
Between the head 20A for the head and the head 19B for the low track.
Direction deviation distance T ₂ (or high track head 20B
Lateral shift distance T ₂ between low track heads 19A )
Is arranged within the range of the above equation (2),
For example, if the low track head 19B is an arbitrary low track 1
When performing the recording and reproducing operations on the 7 B, high track head 20A is always off the position of the low track 17B, it will be located no-signal areas not recorded data.

[0027] Thus, for example, in the case of FIG. 4, even when a recording signal during recording at a low track head 19B by crosstalk 23 leaks to higher track head 20A, high track head 20A is on the low track 17B There is no adverse effect such as rewriting or demagnetizing the data on the low track 17B without being positioned. Also, high track head 20A even when the reproduction of the low track head 19B is without having to reproduce the data of the track 17 B, since the crosstalk 23 is not generated, never cause errors. Reference numeral 24 indicates crosstalk between the low track head 19B and the high track head 20B.

FIG. 5 shows another embodiment of the magnetic head device of the present invention. In the embodiment shown in FIG. 4 described above ,
High track head 20A and low track head 19B
(Or high track head 20B and low track head 20B)
19A) shows a configuration close to each other, but FIG.
In the embodiment shown, the head 20A and the low Tiger for higher track
Head 19B (or high-track head 20B)
The low-track head 19A) is arranged at a distance. Even in such a configuration, between the low track head 19 and the high track head 20 on each surface.
(Between 19A and 20A, between 19B and 20B) , the high track head 20A and the low track
Between the heads 19B (or between the high track head 20B and the low track head 20B).
Since there is a case where crosstalk 26 even between tracks head 19A) is generated, the head distance T ₂ by setting within the scope of Formula in Formula 2, the same effect as the embodiment shown in FIG. 4 To play.

The present invention relates to a high track provided on the slider 21.
For the low track provided on the head 20A for the head and the slider 22
A lateral displacement distance T ₂ between the heads 19B (or a slider
22 and the high track head 20B and the slider 21
Distance in the horizontal direction between the low track heads 19A provided in the vehicle
The distance T ₂ ) is determined, and the sliders 21 and 22 are moved to the low track 17.
A and 17B are arranged to face each other via a recording medium 18 having the same. In such a configuration, as shown in FIG. 6, the high track heads 20A and 20B and the low track heads 19A and 19B are arranged differently from the above-described embodiment, that is, the high track head 20A and the low track head 19A are arranged differently. There is also an effect in the case of an array configuration in which the positional relationship is reversed left and right, and an effect similar to that of the above embodiment is achieved. Reference numeral 27 indicates crosstalk between the low track head 19A and the high track head 20B.

In the above embodiment, only the recording / reproducing head is illustrated for convenience of explanation. However, as shown in FIG. 7, the present invention is applied to a composite type head having an erasing head 28 used for, for example, preceding erasing or tunnel erasing. In this case, it is needless to say that the same effect as in the above embodiment can be obtained. In FIG. 7, the recording media 18 having the sliders 21 and 22, the low tracks 17A and 17B, the low track heads 19A and 19B, and the high track head 20 are shown.
A and 20B have the same configuration as that shown in FIG. Reference numerals 29 and 30 indicate a high track head 20.
A, 20B and crosstalk between the erasing head 28 are shown.
5 to 7, T _PL , T _WU and T _WL are the same as those in FIG.

Also, in the case where a plurality of sliders 23 to 26 are arranged as shown in FIG. T ₁ , T _2b , T _2c , and T _2d indicate the distances between the low track head 19A and each high track head.

[0032]

As described above, according to the first aspect of the present invention, in the magnetic head device having the low track head and the high track head having different track densities, the recording and reproducing operation is performed with the low track head. Since the high track head is configured to correspond to the guard band (between each low track) of the recording medium, the high track head can be prevented from being positioned on the low track during operation of the low track head. Thus, it is possible to reliably prevent the data of another track from being adversely affected by the crosstalk or causing an error in the reproduced data of the low track head. This produces an effect that a highly reliable magnetic head device can be obtained.

In the magnetic head device according to the second aspect of the present invention, sliders having a low track head and a high track head having different track densities are arranged to face each other via a recording medium, and the high track head is used for recording. By configuring so as to correspond to the guard band of the medium (between each low track), it is possible to prevent the opposing high track head from being positioned on the low track during operation of the low track head, Crosstalk between them can reliably prevent adverse effects on the low track on the opposite surface side and cause errors in the data being reproduced by the low track head, thereby ensuring high reliability. Obtainable.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a magnetic head device according to the invention of claim 1;

FIG. 2 is a schematic configuration diagram showing another embodiment of the magnetic head device.

FIG. 3 is a schematic configuration diagram showing still another embodiment of the magnetic head device.

FIG. 4 is a schematic configuration diagram showing one embodiment of a magnetic head device according to the invention of claim 2;

FIG. 5 is a schematic configuration diagram showing another embodiment of the magnetic head device.

FIG. 6 is a schematic configuration diagram showing still another embodiment of the magnetic head device.

FIG. 7 is a schematic configuration diagram showing another embodiment of the magnetic head device.

FIG. 8 is a schematic configuration diagram showing another embodiment of the magnetic head device.

FIG. 9 is a schematic configuration diagram showing an example of a conventional magnetic head device.

[Explanation of symbols]

 Reference Signs List 10 high track head 11 low track head 12 slider 13 recording medium 14 low track 17A, 17B low track 18 recording medium 19A, 19B low track head 20A, 20B high track head 21 slider 22 slider

Claims (2)

(57) [Claims] 1. A low-density form on one surface of a first recording medium.
Having a first head for the resulting track, and a second
For tracks formed on one side of a recording medium with high density
A magnetic head device provided with a slider having a second head according to the first aspect of the present invention, wherein during the recording / reproducing operation of the first recording medium with the first head, the second head is driven by one of the first recording media.
A magnetic head device, wherein the magnetic head device is arranged so as to be positioned between tracks formed at a low density on the surface . 2. A low-density form on one surface of a first recording medium.
Having a first head for the resulting track, and a second
For tracks formed on one side of a recording medium with high density
At least one first slider having a second head of
Furthermore, a low density is formed on the other surface of the first recording medium.
Having a first head for the track
For tracks formed at high density on the other surface of the recording medium
A magnetic head device provided with at least one second slider having a second head, wherein the first head of the first or second slider is the first head.
During the recording / reproducing operation of the recording medium, the second head is
The first recording medium facing the first head in operation
A magnetic head device, wherein the magnetic head device is arranged so as to be positioned between tracks formed on a surface at a low density .