JPH08102020A - Magnetic head assembly and production of suspension for magnetic head assembly - Google Patents

Abstract

PURPOSE: To suppress vibration and to obtain enough strength by making a suspension having such a structure that a metal base body having spring property and a metal material having vibration absorbing characteristics are stuck and adhered. CONSTITUTION: The head assembly is equipped with a suspension 31 and a magnetic head 13 for recording and reproducing of information held by the suspension. The suspension 31 is produced by stacking and fixing a metal material 42 having vibration absorbing characteristics to a metal base body 41. The metal base body 41 consists of, for example, stainless steel to obtain spring property, mechanical strength and corrosion resistance, while the metal material 42 consists of, for example, aluminum or aluminum alloy considering the vibration absorbing characteristics. The suspension 31 holds a magnetic head 13 with a gimbal spring 12 to constitute the magnetic head assembly. By this method, vibration on a magnetic head 13 can be sufficiently suppressed by the suspension 31. Moreover, by laminating the metal materials 41, 42, enough strength can be obtd. for the suspension 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a magnetic head assembly provided in a magnetic disk device used for storing information in information equipment such as a large computer, a personal computer, a laptop computer, and the magnetic head assembly. A method of manufacturing a suspension.

[0002]

2. Description of the Related Art An example of a magnetic disk device provided in various computers will be described with reference to FIGS. FIG. 7 shows the entire magnetic disk device.
As shown in FIG. 7, a magnetic disk 2, a spindle motor (not shown) for rotating the magnetic disk 2 in the direction of the arrow in the drawing, and a swing provided in the base plate 1 so as to be rotatable in the radial direction of the magnetic disk 2. An arm 3 and a voice coil motor 4 that rotationally drives the swing arm 3 are provided. In addition, at the tip of the swing arm 3, it is located facing the porcelain recording surface of the magnetic disk 2,
A magnetic head assembly 5 is mounted which moves with the swing arm 3 in the radial direction of the magnetic disk 2 when the swing arm 3 rotates to perform magnetic recording and reproduction on the magnetic disk 2.

The magnetic head assembly 5 will be described with reference to FIGS. 7 to 11. In the figure, 11 is an elongated triangular suspension, which is formed of a metal plate having a spring property. A circular hole 19 is formed in a portion of the suspension 11 that forms a triangular bottom, and a mount member 18 having a hollow cylindrical protruding caulking portion 22 that penetrates the hole 19 is attached to the bottom. There is.

Further, one end of a gimbal spring 12 is attached by welding to a portion of the suspension 11 which forms the apex of the triangular shape. This gimbal spring 1
A magnetic head 13 is attached to the other end of 2.

The magnetic head assembly 5 is attached to the swing arm 3 by caulking the caulking portion of the mount member 18 through a through hole provided at the tip of the swing arm 3. The suspension 11 applies a force to move the magnetic head 13 toward the magnetic head 12.

This magnetic head 13 has a head slider 1 attached to a gimbal spring 12 as shown in FIG.
4. A core 15 attached to this head slider 14 and forming a gap 16 with respect to the head slider 14.
And a coil 17 wound around the core 15. A lead wire 20 is connected to the coil 17, the lead wire 20 is covered with an insulating tube 21, is drawn out along the suspension 11, and is connected to the circuit board 6 provided on the base plate 1.

Then, when the rotation of the magnetic disk 2 is stopped, it is pushed by the spring force of the suspension 11 as shown in FIG.
As shown in, the head slider 14 is in contact with the surface of the magnetic disk 2. When the magnetic disk 2 starts to be rotated by the motor, a lift force is generated on the rear surface 14a of the head slider 14 facing the magnetic disk 2 due to the air flow generated by the rotation of the magnetic disk 2.
As shown in, the head slider 14 floats above the magnetic disk 2. Since the spring force of the suspension 11 is applied to the head slider 14 as described above, the stability of the head slider 14 is also maintained at the equilibrium point between the spring force and the lift force.

A method in which the head slider 14 contacts the magnetic disk 2 when the magnetic disk 2 stops rotating and the head slider 14 floats when the magnetic disk 2 starts rotating is called a contact start / stop method.

[0009]

In the magnetic disk drive, the gap 1 in the magnetic head 13 is used for high density recording.
The relationship between 6 and the magnetic disk 2 is important. That is,
The distance between the gap 16 and the magnetic disk 2 has a great influence on the writing and writing characteristics of data to and from the magnetic disk 2. The smaller the distance, the higher the recording density characteristic, and the stable flying of the distance. The better the electromagnetic conversion characteristics, the better.

However, since there are fine irregularities present on the surface of the magnetic disk 2, a vortex flow is generated between the head slider 14 and the magnetic disk 2 when the magnetic disk rotates, which becomes a negative pressure flow. The magnetic head 13 may be drawn into the negative pressure flow and vibrate slightly. This phenomenon makes it difficult to deal with high density recording.

Therefore, in order to avoid the occurrence of such a phenomenon conventionally, the magnetic head 13 is supported by the suspension 11 having a spring property, and a spring force directed to the magnetic disk 2 is applied to the magnetic head 13. Due to
Vibration of the magnetic head 13 due to the negative pressure flow is suppressed.

However, the suspension 1 having a spring property
Even if the magnetic head 13 is supported by No. 1, the magnetic head vibration is not sufficiently taken as a countermeasure, and the negative pressure flow causes vibration in the magnetic head 13 to hinder high density recording. Therefore, sufficient vibration countermeasures for the magnetic head 13 have been demanded.

The invention of the present application has been made in view of the above circumstances, and an object thereof is to provide a magnetic head assembly capable of sufficiently suppressing the occurrence of vibration in the magnetic head.

It is another object of the present invention to provide a suspension manufacturing method capable of obtaining a suspension for a magnetic head assembly that sufficiently suppresses the occurrence of vibration in the magnetic head.

[0015]

A magnetic head assembly of the first invention comprises a suspension and a magnetic head which is held by the suspension and records and reproduces information. The suspension absorbs vibrations in a metal base material. It is characterized in that a metal material having characteristics is polymerized and fixed.

The magnetic head assembly of the second invention comprises a suspension and a suspension which is held by the suspension and which records and reproduces information. The suspension has a vibration absorbing characteristic between a pair of metal base materials. It is characterized in that the non-metal material is sandwiched and polymerized and fixed.

The magnetic head assembly of the third invention comprises a suspension and a suspension which is held by the suspension and which records and reproduces information. The suspension is provided between a pair of non-metallic materials having vibration absorption characteristics. It is characterized by being polymerized and fixed by sandwiching a metal material.

The magnetic head assembly of the fourth invention comprises a suspension and a suspension which is held by the suspension and records and reproduces information. The suspension has a film having a vibration absorbing property on the surface of a metal base material. It is characterized by being formed.

According to a fifth aspect of the method of manufacturing a suspension for a magnetic head assembly of the present invention, a metal plate material is polymerized with a plate material made of a non-metal material having a vibration absorbing property to form a fixed polymer material. It is characterized by punching with a press.

[0020]

According to the first to fourth inventions, the suspension can sufficiently suppress the occurrence of vibration in the magnetic head. According to the fifth invention, it is possible to easily manufacture a suspension having excellent vibration absorption characteristics.

[0021]

Embodiments of the present invention will be described with reference to the drawings. Each of the first to fourth inventions is directed to the magnetic head assembly shown in FIG. In the magnetic head assembly of the magnetic disk device shown in FIG. 1, other constituent parts except the suspension 31 which is the feature of the first invention to the fourth invention are shown in FIGS.
The same reference numerals as those of the magnetic head assembly shown in FIG. In each of the first to fourth inventions, the configuration of the suspension 31, which is the characteristic of each, will be described.

An embodiment of the first invention will be described with reference to FIG. FIG. 2 shows the suspension 31 in FIG. 1 broken along the line AA. In this embodiment, the suspension 31 has a layered structure in which a plate-shaped metal base material 41 having a spring property and a plate-shaped metal material 42 having a vibration absorbing property are polymerized and fixed. The metal base material 41 is made of, for example, stainless steel in consideration of spring properties, mechanical strength, corrosion resistance and the like. The metal material 42 is formed of, for example, aluminum or an alloy containing aluminum in consideration of vibration absorption characteristics. Metal base material 41 and metal material 42
Thickness is set as appropriate according to need. The metal base material 41 and the metal material 42 are polymerized and fixed by a rolling process or another known method. When manufacturing the suspension 31,
First, the metal base material 41 and the metal material 42 are polymerized, and then this polymer material is pressed to be punched into a suspension shape.

As shown in FIG. 1, the suspension 31 supports the magnetic head 13 via the gimbal spring 12 to form a magnetic head assembly. The suspension 31 of this magnetic head assembly is attached to the swing arm 3 provided in the magnetic disk device as shown in FIG.

The suspension 31 constructed in this way
Is superior to the conventional one in the characteristic of suppressing the vibration with respect to the magnetic head 13. Therefore, this suspension 3
The magnetic head assembly 5 provided with 1 is affected by an eddy current generated between the head slider 14 of the magnetic head assembly and the magnetic disk 2 by the action of the suspension 31 when the magnetic disk 2 of the magnetic disk device rotates. It is possible to sufficiently suppress the vibration of the magnetic head 13 and perform high density recording. Moreover, the suspension 31
Since the metal materials 41 and 42 are polymerized with each other, sufficient strength can be secured.

An embodiment of the second invention will be described with reference to FIG. FIG. 3 shows the suspension 31 in FIG. 1 broken along the line AA. The suspension 31 of the embodiment of the present invention has a layered structure in which a plate-shaped non-metal material 53 having a vibration absorbing characteristic is sandwiched between a pair of plate-shaped metal base materials 51 and 52 having a spring property and polymerized and fixed. It is what makes up. The metal base materials 51 and 52 are formed of, for example, stainless steel for the same reason as in the first invention. The non-metal material 53 is formed of, for example, a synthetic resin having viscoelasticity in consideration of vibration absorption characteristics. The thicknesses of the metal base materials 51 and 52 and the non-metal material 53 are appropriately set as needed. Metal base material 5
1, 52 and the non-metal material 53 are polymerized and fixed by a known method such as pressurization or heating.

The suspension 31 constructed as described above
When a pair of metal base materials 51, 52 is deformed by being subjected to vibration, the non-metal material 53 made of, for example, a synthetic resin is sheared and deformed, and the vibration energy changes the thermal energy to absorb the vibration. Therefore, the suspension 31 can sufficiently suppress vibration to the magnetic head 13 as compared with the conventional one, and further, the pair of metal base materials 51 and 52 can protect the non-metal material 53 to enhance durability. The suspension 31 can have sufficient strength.

An embodiment of the third invention will be described with reference to FIG. FIG. 4 shows the suspension 31 in FIG. 1 broken along the line AA. In the suspension 31 of the embodiment of the present invention, a plate-shaped metal base material 63 is sandwiched between a pair of plate-shaped plate-shaped non-metal materials 61 and 62 having a vibration absorbing property and having a spring property, and they are polymerized and fixed. It has a layered structure. The non-metal materials 61 and 62 are formed of, for example, synthetic resin in consideration of vibration absorption characteristics. The metal base material 63 is formed of, for example, stainless steel for the same reason as in the first invention. The thicknesses of the non-metal materials 61 and 62 and the metal base material 63 are appropriately set as needed. The non-metal materials 61 and 62 and the metal base material 63 are polymerized and fixed by a known method such as pressurization or heating.

The suspension 31 constructed as described above
Is capable of sufficiently suppressing the vibration of the magnetic head 13 by the suspension 31 as compared with the conventional one, and further, the pair of non-metallic materials have the electrical insulation property to enhance the electrical insulation property of the suspension 31. It is easy to route the wire 20.

An embodiment of the fourth invention will be described with reference to FIG. FIG. 5 shows the suspension 31 in FIG. 1 broken along the line AA. In the magnetic head according to the embodiment of the present invention, the suspension 31 is formed by forming a film 72 having a vibration absorbing property on the surface of a metal base material 71. The metal base material 71 is formed of, for example, stainless steel for the same reason as in the first invention. The film 72 having the vibration absorbing property may be made of, for example, a metal or a non-metal material. As a method of forming 72 on the surface of the metal base material 71, a known method such as a vapor deposition method or a sputtering method can be mentioned depending on the material of the film.

The suspension 31 constructed as described above
In comparison with the related art, the suspension 31 can sufficiently suppress the vibration of the magnetic head 13 and the suspension 31 can be easily manufactured.

An embodiment of a method of manufacturing a suspension for a magnetic head assembly of the fifth invention will be described with reference to FIG. First, as shown in FIG. 6, a polymer material 83 is formed by superposing and fixing a metal plate material 81 for suspension with a plate material 82 made of a non-metal material having a vibration absorbing property. The metal plate member 81 is made of, for example, stainless steel. The plate material 82 is formed of, for example, a non-metal material. As a method for polymerizing and fixing the metal plate member 81 and the plate member 82 made of a non-metal material, a known method such as adhesion may be used. Next, this polymer material 83 is punched into a shape of the suspension 84 in a virtual line by pressing. As a result, a suspension in which the plate member 82 made of a non-metal material having a vibration absorbing property is superposed on the entire surface of the metal plate member 81 is obtained.

According to this method, it is possible to easily manufacture a suspension having excellent vibration absorbing characteristics for suspension, as compared with the conventional method in which a non-metal material having vibration absorbing characteristics is adhered to a suspension metal plate material punched into the shape of the suspension. can do.

[0033]

According to the magnetic head assembly of the first aspect of the present invention, the suspension has a structure in which a metal base material having a spring property and a metal material having a vibration absorbing property are polymerized and fixed to each other. Vibration of the magnetic head can be sufficiently suppressed by the suspension, and moreover, since the metal materials are polymerized with each other, sufficient strength can be secured for the suspension.

According to the magnetic head assembly of the second aspect of the invention, the suspension has a structure in which a non-metal material having a vibration absorbing characteristic is sandwiched between a pair of metal base materials and is superposed and fixed. By virtue of the suspension, the vibration of the magnetic head can be sufficiently suppressed, and the non-metal material can be protected by the pair of metal base materials.

According to the magnetic head assembly of the third aspect of the present invention, the suspension has a layered structure in which a metal material is sandwiched between a pair of non-metal materials having a vibration absorption characteristic, and they are polymerized and fixed. By virtue of the suspension, vibration of the magnetic head can be sufficiently suppressed, and if the pair of non-metal materials have electrical insulation, the electrical insulation of the suspension can be enhanced.

According to the magnetic head assembly of the fourth aspect of the present invention, since the suspension has a film having a vibration absorbing property formed on the surface of the metal base material, the suspension can sufficiently vibrate the magnetic head in comparison with the conventional one. It can be suppressed and the suspension can be easily manufactured. According to the method of manufacturing a suspension for a magnetic head assembly of the fifth invention, it is possible to easily manufacture a suspension having excellent vibration absorption characteristics.

[Brief description of drawings]

FIG. 1 is a top view showing a magnetic head assembly according to an embodiment of the first to fourth inventions.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 which is an embodiment of the first invention.

FIG. 3 is a sectional view taken along the line AA of FIG. 1 which is an embodiment of the second invention.

FIG. 4 is a sectional view taken along the line AA of FIG. 1 which is an embodiment of the third invention.

FIG. 5 is a sectional view taken along the line AA of FIG. 1 which is an embodiment of the fourth invention.

FIG. 6 is a view showing a polymerized material in one embodiment of the manufacturing method of the fifth invention.

FIG. 7 is a perspective view showing an example of a magnetic disk device.

8 is a top view showing an example of a magnetic head assembly provided in the magnetic disk device shown in FIG.

FIG. 9 is a bottom view showing the magnetic head assembly of the example.

FIG. 10 is a side view showing the magnetic head assembly of the same example.

FIG. 11 is an enlarged view showing a magnetic head in the magnetic head assembly of the same example.

[Explanation of symbols]

5 ... Magnetic head assembly, 13 ... Magnetic head, 14 ... Head slider, 15 ... Head, 16 ... Gap, 31 ... Suspension, 41 ... Metal base material, 42 ...
Metal material, 51, 52 ... Metal material, 5
3 ... Non-metal material, 61, 62 ... Non-metal material,
63 ... Metal base material, 71 ... Metal base material,
72 ... Membrane, 81 ... Metal material, 8
2 ... Non-metal material, 84 ... Suspension.

Claims (5)

[Claims] 1. A suspension, and a magnetic head, which is held by the suspension and records and reproduces information, are provided, and the suspension is formed by polymerizing and fixing a metal material having a vibration absorbing property on a metal base material. A magnetic head assembly characterized by the above. 2. A suspension, and a suspension which is held by the suspension and which records and reproduces information, wherein the suspension comprises a pair of metal base materials and a non-metal material having a vibration absorbing property is sandwiched between the suspensions and polymerized. A magnetic head assembly characterized by being firmly fixed. 3. A suspension and a suspension for recording and reproducing information held by the suspension, wherein the suspension is polymerized by sandwiching a metal base material between a pair of non-metal materials having vibration absorption characteristics. A magnetic head assembly characterized by being firmly fixed. 4. A suspension and a suspension for recording and reproducing information held by the suspension, wherein the suspension is formed by forming a film having a vibration absorbing property on a surface of a metal base material. And magnetic head assembly. 5. A magnetic head assembly characterized in that a metal plate material is polymerized with a plate material made of a non-metallic material having a vibration absorbing property to form a fixed polymer material, and the polymer material is punched by a press. Of manufacturing suspension for automobile.