JPH0620231A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To stabilize the levitation characteristic of a slider and to make a device small-sized by a method wherein recording signal lines and reproductive signal lines which are connected to heads on individual assemblies are arranged by being divided into both sides so as to sandwich the slider. CONSTITUTION:Each head is connected to terminals 25, 26 which are situated at the tip face of a slider 21; recording signal lines 27 and reproductive signal lines 28 are connected respectively to the terminals. The signal lines 27 are connected to the terminals 25 for a bulk-shaped head; the signal lines 28 are connected to the terminals 26 for an MR head; each of the signal lines 27, 28 is composed of two wires. The signal lines 27 are made to creep along a side edge continued to the slider side face of a support spring 12 along one side of a slider 11 from the terminals 25; they are fixed to a retainer 12A situated at the support spring 12. The signal lines 28 are fixed to a retainer 12B in the same manner. Thereby, the wire rigidity of the signal lines is reduced, an influence on the posture of the slider 11 can be reduced, the levitation characteristic of the slider 11 is stabilized, a device can be made small-sized and a high recording density can be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device, and more particularly, to an improvement in a structure for drawing a signal line from a head in a head assembly.

[0002]

2. Description of the Related Art In recent years, in-line magnetic disk devices have become the mainstream because magnetic disk devices have become more compact and larger in capacity, and access speed has also increased. The in-line type magnetic disk device is described in, for example, Japanese Patent Laid-Open No. 1-192010.

FIG. 9 shows the head circumference of the head assembly in the data surface servo in such a magnetic disk device. A slider A, which generates a levitation force by the rotation of a disk, has a support spring C with a gimbal spring B interposed.
Is attached to. The head D is composed of, for example, a bulk head, and is provided on the end surface of the slider. The signal line E from the head is formed by twisting four wires, is drawn out along one side surface of the slider, and is then drawn out through a tube F on one side surface of the support spring. , And is fixed together with the tube by a presser on the support spring C. In addition, FIG.
Shows the structure around the head of the head assembly in the servo surface servo. The slider a is attached to the support spring c via a gimbal spring b, and the head d is made of, for example, a thin film head, and is provided on the end surface of the slider. The signal line e from the head is formed by twisting two wires, is drawn out along one side surface of the slider, and is then drawn out through a tube f on one side surface of the support spring. , And the tube and the support spring are fixed by a retainer. Then, these head assemblies are arranged adjacent to each other between the disks together with a head assembly having a data head having the same structure, and a swing arm that swings on a carriage that moves linearly or around a single point. Held in.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since all the signal lines are arranged only on one side of the slider and the support spring, the rigidity of the signal lines is increased, which affects the movement of the slider around the axis x (rolling) and the movement around the y axis (pitching). . This is traditionally
The rigidity of the signal line is set to be smaller than the rigidity of the gimbal so that the attitude of the gimbal, that is, the attitude of the slider is not affected.
However, magnetic disk devices are increasingly required to be smaller, larger in capacity, and higher in recording density. Along with this, sliders are made smaller, gimbals are made less rigid, support springs are made smaller, and signal line rigidity is reduced. The influence of the signal line stiffness on the levitation characteristics cannot be ignored.

Further, with the miniaturization of magnetic disk devices, the disk spacing has become narrower. In the conventional disk device, the recording signal line of the data head is arranged on the same side as the reproduction signal line of the servo head. Therefore, an error occurs in the positioning of the head based on so-called coupling noise, in which the reproduced signal line of the servo head catches noise leaking from the recording signal line of the adjacent data head.

An object of the present invention is to make it possible to reduce the rigidity of the signal line from the head and to achieve miniaturization, large capacity, and high recording density of the magnetic disk device. Is to let you.

Another object of the present invention is to minimize the deterioration of the positioning accuracy of the head due to the noise leaking from the signal line of the data head to the servo head signal line, thereby reducing the size and size of the magnetic disk device. It is to make it possible to achieve high capacity and high recording density.

Yet another object of the present invention is to make it possible to reduce the rigidity of the signal line from the head, and to prevent the signal line from the servo head from leaking from the signal line of the data head. It is possible to prevent a positioning error due to coupling noise and to achieve miniaturization of a magnetic disk device, increase in capacity, and increase in recording density.

[0009]

SUMMARY OF THE INVENTION To achieve the first object, a magnetic disk apparatus of the present invention comprises a head assembly and a servo head having a data head disposed adjacently between disks. And a recording signal line and a reproducing signal line connected to the head in each head assembly are arranged on both sides of a slider.

To achieve the second object, the magnetic disk drive of the present invention comprises a head assembly having a data head and a head assembly having a servo head, which are arranged adjacent to each other between the disks. And the reproduction signal line of the head assembly having the servo head is arranged on the same side as that of the head assembly having the data head.

To achieve the purpose of the third surface, the magnetic disk drive of the present invention comprises a head assembly having a data head and a head assembly having a servo head disposed adjacent to each other between the disks. And a recording signal line and a reproduction signal line connected to the head in each head assembly are arranged on both sides with a slider in between, and a reproduction signal of a head assembly having a servo head. The line is arranged on the same side as that of the head assembly having the data head, and the recording signal line is arranged on the same side as that of the head assembly having the data head.

[0012]

In the first magnetic disk device, the recording signal line and the reproducing signal line from the head in each of the head assembly having the data head and the head assembly having the servo head are divided on both sides by sandwiching the slider. Since all the signal lines are arranged together on one side surface of the slider as in the conventional magnetic disk device, the wire rigidity of the signal lines is reduced to half. Not only is the pitching smooth, but the resistance of the signal lines on both sides of the rolling axis of the slider is balanced, so the flying characteristics of the slider are stabilized.

In the second magnetic disk device, since the reproduction signal line of the head assembly having the servo head is arranged on the same side as that of the head assembly having the data head, the reproduction signal line of the servo head is changed to the data head. From the recording signal line of the servo head to the reproducing signal line of the servo head, and the signal jumping to the reproducing signal line of the data head is minimized, and the recording signal in the data head does not affect the servo signal of the servo head. The positioning accuracy of is improved.

In the third magnetic disk device, not only the head assembly of the servo head but also the recording signal line and the reproducing signal line from the head in the head assembly having the data head are separately arranged on both sides of the slider. Since the reproduction signal lines are arranged on the same side, the wire rigidity of the signal lines is higher than that in the case where all the signal lines in the conventional magnetic disk device are arranged on one side surface of the slider. It is reduced to half, the rolling of the slider around the longitudinal axis of the head assembly and the pitching around the lateral axis are smooth, the flying characteristics of the slider are stable, and the data head of the servo head reproduces the signal line. The jumping of the signal flowing through the reproduction signal line is minimized, and the recording signal in the data head is the servo signal of the servo head. No longer affect the improves the positioning accuracy of the head.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the magnetic disk device of the present invention will be described below with reference to FIGS.

FIG. 1 shows a head assembly 10 for writing and reading data to and from a disk in this magnetic disk device. Slider 1
1 is arranged so that its longitudinal direction is aligned with that of the support spring 12, and is attached to the support spring 12 with a gimbal 13 interposed. The data head 14 is attached to the center of the tip surface of the slider 11. The data head itself is composed of a thin film head and comprises an MR head and a bulk type head. The MR head and the bulk type head or the inductive head are connected to terminals 15 and 16 on the tip surface of the slider 11 as shown in FIG.
A recording signal line 17 and a reproduction signal line 18 are connected to each terminal.

The recording signal line 17 is the terminal 1 of the bulk type head.
5, the reproduction signal lines 18 are connected to the terminals 16 of the MR head, respectively. The conductor diameter of these signal lines is 30 to 5
It consists of two 0 μm urethane film wires. But,
In this magnetic disk device, the recording signal line 17 extends from the terminal 15 along one side surface of the slider 11 to the support spring 1.
In the support spring 12, the tube 19 is cut along the side edge of the slider 2 which is connected to the side surface of the slider.
The position is fixed to the presser foot 12A on the support spring through the tube A. Then, the reproduction signal line 1
The reference numeral 8 denotes a support spring 12 which is passed from the terminal 16 along the side surface on the opposite side of the slider 11 along the side edge of the support spring 12 following the slider side surface, and which is passed through the tube 19B to interpose the tube. The position of the presser foot 12B is fixed.

FIG. 3 shows a head assembly 20 for the servo head. The slider 21 is arranged so that its longitudinal direction matches that of the support spring 22, and is attached to the support spring 22 with a gimbal 23 interposed. The servo head head 24 is attached to the center of the tip surface of the slider 21. The data head itself is composed of a thin film head and comprises an MR head and a bulk type head. Each head has a slider 2 as shown in FIG.
1, the recording signal line 27 and the reproducing signal line 28 are connected to the terminals 25 and 26 on the front end surface of the terminal 1.

The recording signal line 27 is the terminal 2 of the bulk type head.
5, the reproduction signal line 28 is connected to each terminal 25 of the MR head. Each signal line 27, 28 is composed of two wires. The wire itself is made of, for example, a urethane coated wire whose conductor has a diameter of 30 to 50 μm. However, in this magnetic disk device, the recording signal line 27 extends from the terminal 25 along one side surface of the slider 11.
The support spring 12 is passed along a side edge continuous with the slider side surface, passes through a tube 29A in the support spring 12, and is fixed together with the tube to a retainer 12A in the support spring. The reproduction signal line 28 extends from the terminal 26 along the other side surface of the slider 11 along the side edge of the support spring 12 that is continuous with the slider side surface, and passes through the tube 29B. Support spring with tube 1
The position is fixed to the presser foot 12B located at 2. And
The recording signal line 27 in this head assembly 20 is shown in FIG.
As shown in FIG. 2, when the slider 11 in the head assembly 10 shown in FIG.
Is arranged on the side where the signal is arranged, and the reproduction signal line 2
8 is arranged on the side of the head assembly 10 on which the recording signal line 17 is arranged.

The head assemblies 10 and 20 are arranged as shown in FIG. The disks 31 and 32 are arranged at regular intervals and fixed to the spindle. The head assembly 10 having the data head 14 is arranged on one side of each disk 31, 32, and the head assembly 20 having the servo head 24 is arranged on the opposite side of the disks 31, 32, as in the conventional magnetic disk device. ing. At this time, since the signal lines in the head assembly 10 and the head assembly 20 are arranged opposite to each other, the recording signal line 27 in the head assembly 20 and the reproduction signal line 18 of the head assembly 10 in the slider 21 are arranged. The reproduction signal line 28 is arranged on the side where the recording signal line 17 of the head assembly 10 of the slider 21 is arranged. As shown in FIG. 6, in each of the head assemblies 10 and 20, the support spring 12 is fixed to one carriage 33, the carriage 33 is supported by the linear motion guide, and the carriage 33 is moved by a linear motor or the like to move the data head 14.
The servo head 24 can be linearly moved in the radial direction of the disks 31 and 32.

In such a magnetic disk device, when the disks 31 and 32 rotate, the sliders 11 and 21 float and the carriage 33 is moved to move the heads 14 and 24 to arbitrary positions on the disk. Over When flying the sliders 11 and 21, the slider 1
1, 21 will perform rolling about the axis x and pitching about the axis Y.
The recording signal line 17 and the reproducing signal line 18 in FIG. 2 are separated and pulled out by sandwiching the slider 11, and the recording signal line 27 and the reproducing signal line 28 in the head assembly 20 are pulled out separately by sandwiching the slider 21. However, since the rigidity of the signal line in each of the head assemblies 10 and 20 is smaller than that of the signal line in the conventional head assembly, the slider 11 can be smoothly rolled and pitched. Since the recording signal line 17 and the reproducing signal line 18 in the head assembly 10 are arranged symmetrically with respect to the rolling axis x of the slider 11, the resistance generated by the signal lines 17 and 27 when the slider 11 rolls. Are the same, and the recording signal line 17 and the reproducing signal line 18 in the head assembly 20 are
Are arranged symmetrically with respect to the rolling axis x of the slider 11, so that when the slider 11 rolls, the resistances generated by the signal lines 17, 17 become the same. Therefore, the postures of the sliders 11 and 21 and the gimbal 13 between them and the support springs 12 and 22 are stable, and particularly, the postures when they are rolling are stable, and the sliders 11 and 21 are extremely stable.
21 floating characteristics can be obtained.

Further, the head assembly 10 having the data head and the head assembly 20 having the servo head, which are arranged between the disks 31 and 32, have the respective recording signal lines 17, as described above. Head assembly 1 with data heads 27 arranged on the same side
Reproduction signal line 1 in head assembly 20 having a servo head in which leakage magnetic flux from recording signal line 0 of 0 is adjacent
Since the positioning error of the data head 14 due to the so-called electromagnetic coupling that affects 8 is also reduced, the heads 14 and 24 can be positioned with extremely high accuracy in combination with the stable flying characteristics described above.

7 and 8 show the construction of a head assembly in another magnetic disk drive of the present invention.

This magnetic disk device is of the servo surface servo type. The head assembly with the data head is
The configuration is similar to that described in connection with FIGS. However, a head assembly 120 having a servo head
As shown in FIG. 7, it has a thin film head 124, and is provided with a slider 121 attached to the support spring with a support spring 122 and a gimbal 123 interposed.

The slider 121 has a support spring 12 in the longitudinal direction.
2, and the supporting spring 12
It is attached to 2 with a gimbal 123 interposed. The thin film head 124 is provided at the center of the front end surface of the slider 121, and the terminal 126 for this head has the head 124.
It is located near the. The reproduction signal line 1 is connected to the terminal 126.
28 is connected. The reproduction signal line 128 is composed of two wires, and as shown in FIG. 6, it is continuous from the terminal 126 to the side surface of the slider 211 along the other side surface of the slider 211. It is passed along the side edge of the support spring 112 and is passed through the tube 129 on the side edge of the support spring, and the position is fixed to the presser foot 112B on the support spring 112 via the tube. As shown in FIG. 8, the reproduction signal line 128 has a head assembly having data heads arranged in the same manner when the head assembly is arranged with the air bearing surface of the slider 21 facing upward. For example, it is arranged on the same side as the reproduction signal line 18 of the head assembly 10 shown in FIG.

The head assembly 120 is arranged between the disks and adjacent to the head assembly having the data head, and similarly to the above-described embodiment, the support spring 122 is fixed to the carriage and the magnetic field is magnetic. A disk device can be configured. However, since the reproduction signal line 128 is adjacent to the reproduction signal line of the head assembly having the data head, the influence of leakage flux from the recording signal line of the head assembly having the data head disappears, and Positioning errors are reduced.

[0027]

According to the first aspect of the present invention, since the wire rigidity of the signal line is reduced and the influence on the posture of the slider can be reduced, the flying characteristic of the slider is stable,
It is possible to easily achieve miniaturization, high capacity, high recording density, etc. of the magnetic disk device.

According to the second aspect of the present invention, the reproduction signal line of the servo head is less likely to have a signal from the recording signal line with respect to the data head, and the positioning accuracy of the head is improved. And high recording density can be easily achieved.

According to the third aspect of the present invention, the wire rigidity of the signal line is reduced, the influence on the posture of the slider can be reduced, and the reproduction signal line of the servo head is a signal from the recording signal line to the data head. Since the jumping is reduced, the flying characteristics of the slider are stabilized, and the positioning accuracy of the head is improved, it is possible to more easily achieve miniaturization, increase in capacity, increase in recording density, etc. of the magnetic disk device.

[Brief description of drawings]

FIG. 1 is a perspective view of a head assembly having a data head in an embodiment of a magnetic disk device of the present invention.

FIG. 2 is an explanatory diagram showing a state in which a signal line is pulled out from a head in the head assembly of FIG.

FIG. 3 is a perspective view of a head assembly having a servo head.

FIG. 4 is an explanatory diagram showing a state in which a signal line is pulled out from a head in the head assembly in FIG.

FIG. 5 is an explanatory diagram showing a relative arrangement relationship of heads and a lead-out state of signal lines in each head assembly.

FIG. 6 is an explanatory diagram showing configurations of a disk, a head assembly, and a carriage.

FIG. 7 is a perspective view of a head assembly having a servo head in another embodiment of the magnetic disk device of the present invention.

8 is an explanatory diagram showing a state in which a signal line is pulled out from a head in the head assembly in FIG.

FIG. 9 is an explanatory diagram showing a configuration of a head assembly having a servo head in a conventional magnetic disk device.

FIG. 10 is an explanatory diagram showing another configuration of a head assembly having a servo head in a conventional magnetic disk device.

[Explanation of symbols]

 10, 20, 120 ... Head assembly 11, 21, 121 ... Slider 12, 22, 122 ... Support spring 13, 23, 123 ... Head 16, 26, 126 ... Recording signal line 17, 27, 127 ... Reproduction signal line 31 , 32 ... Disc

Claims (3)

[Claims] 1. A magnetic disk drive comprising a head assembly having a data head and a head assembly having a servo head disposed adjacent to each other between the disks, in each head assembly. A magnetic disk drive characterized in that a recording signal line and a reproducing signal line connected to a head are arranged on both sides of a slider so as to be separated from each other. 2. A magnetic disk device comprising a head assembly having a data head and a head assembly having a servo head disposed adjacent to each other between the disks, and a head set having a servo head. A magnetic disk drive characterized in that a three-dimensional reproduction signal line is arranged on the same side as that of a head assembly having a data head. 3. A magnetic disk drive comprising a head assembly having a data head and a head assembly having a servo head disposed adjacent to each other between the disks, in each head assembly. The recording signal line and the reproduction signal line connected to the head are divided on both sides of the slider, and the reproduction signal line of the head assembly having the servo head is the same as that of the head assembly having the data head. A magnetic disk drive characterized in that a recording signal line is arranged on the same side as that of a head assembly having a data head.