JPH0896332A - Magnetic head positioning device - Google Patents

Abstract

PURPOSE: To enhance the reliability of a magnetic disk device by preventing head crush owing to dust and also preventing deterioration of the floating amt. of a magnetic head. CONSTITUTION: A 1st load spring 4-1 and a 2nd load spring 4-2, mounting the magnetic head are integrated with a 1st head spacer 1 and a 2nd head spacer 2 respectively by spot welding. A boss part 1A of the 1st head spacer 1 and a boss part 2A of the 2nd head spacer 2 are inserted and fitted into a positioning through hole 31 of an arm 3 from the side opposite to each other respectively. At the same time, the 1st load spring 4-1 and the 2nd load spring 4-2 are fixed to a tip part of the arm 3 with an adhesive 5 while being given a load.

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 used in an information processing system or the like, and more particularly to a magnetic head positioning device having a structure for fixing a load spring to the tip of an arm by using a head spacer.

[0002]

2. Description of the Related Art In recent years, with the increase in capacity and downsizing of magnetic disk devices, it has become necessary to mount a large number of magnetic recording media within the limited thickness of the device housing. Along with this, the distance between the magnetic recording media has become narrower, and as a result, the thickness of the arm member having the load spring mounted with the magnetic head for reading / writing data from / on the magnetic recording medium has become thinner. .

Referring to FIG. 7, a conventional magnetic head positioning device has a magnetic head for reading / writing data at one end thereof, and the magnetic head is floated over a magnetic recording medium with an extremely narrow gap. Is provided at the other end of the load spring 71, and an arm 72 that is driven by a driving force generated by a voice coil motor or the like and that transmits the driving force to the magnetic head via the load spring 71. ,
An attachment portion 73 for attaching the load spring 71 to the arm 72, and an attachment screw 7 for tightening and fixing the load spring 71 to the tip portion of the arm 72 via the attachment portion 73.
4 and.

Usually, a conventional magnetic head positioning device has a plurality of arms. In this case, an intermediate arm 72 located in the middle has a plurality of load springs 71 each having a magnetic head mounted on the upper and lower surfaces of the tip. Are fastened and fixed using the mounting screws 74 via the mounting portions 73.
Further, one load spring 71 having one magnetic head mounted on the lower surface of the tip end is fastened and fixed to the uppermost arm 72 located at the uppermost portion using a mounting screw 74 via a mounting portion 73, and at the lowermost portion. On the lowermost arm 72 located, one load spring 71 having one magnetic head mounted on the upper surface of the tip is attached with a mounting screw 74 via a mounting portion 73.
It is tightened and fixed using.

[0005]

However, the conventional magnetic head positioning device described above has the following problems.

First, since the load spring is tightened and fixed to the tip of the arm by using a mounting screw, dust generated by the tightening of the mounting screw adheres to the magnetic recording medium or the magnetic head to cause a head crash. This may cause a decrease in reliability of the magnetic disk drive.

Secondly, since the load spring is attached to the tip of the arm using the attaching screw, the deformation (warping) of the arm due to temperature change is transmitted to the load spring and adversely affects the flying posture of the magnetic head. As a result, the flying height of the magnetic head is reduced, and as a result, the reliability of the magnetic disk device is reduced.

A main object of the present invention is to provide a magnetic head positioning device which solves the above-mentioned problems and can prevent a head crash due to dust.

Another object of the present invention is to solve the above problems and to provide a magnetic head positioning device capable of suppressing deformation (warping) of the arm due to temperature change.

Another object of the present invention is to provide a magnetic head positioning device capable of stabilizing the flying posture of a magnetic head mounted on a load spring.

Still another object of the present invention is to provide a magnetic head positioning device capable of further improving the reliability of the magnetic disk device.

[0012]

A magnetic head positioning device of the present invention comprises at least one arm having a through hole for positioning at its tip, at least one load spring having a magnetic head mounted thereon, the load spring and the spot. At least one head spacer that can be integrated by welding and that has a boss portion that can be inserted into the positioning through hole, and an adhesive applied on the surface of the tip of the arm excluding the positioning through hole. The head springs, which are integrated with the load spring by spot welding, are inserted into the positioning through holes from the opposite sides to be fitted into the boss portions, respectively, and the tip end of the arm is sandwiched between the load springs. Are fixed with the above adhesive. The boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole. The boss portion of the head spacer is provided substantially at the center of the surface facing the tip portion of the arm. The head spacer is made of the same material as the load spring.

Another magnetic head positioning device of the present invention is
At least one arm having a through hole for positioning at the tip, a first head spacer having a boss portion that can be inserted into the through hole for positioning, a load spring equipped with a magnetic head, and spot welding are integrated. The first head includes: a second head spacer having a boss portion that can be inserted into the positioning through hole; and an adhesive applied on a surface of the tip portion of the arm excluding the positioning through hole. The load spring and the first head spacer are inserted in a state where the spacer and the boss portion of the second head spacer are inserted into and fitted into the positioning through holes from opposite sides, respectively, and the tip end portion of the arm is sandwiched. It is fixed with the above adhesive. The boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole. The boss portion of the head spacer is provided substantially at the center of the surface facing the tip portion of the arm. The head spacer is made of the same material as the load spring.

In still another magnetic head positioning device of the present invention, at least one arm having a positioning through hole at its tip, a load spring on which a magnetic head is mounted, and spot welding are integrated, and the above positioning through hole is formed. A first head spacer having a boss portion that can be inserted into
A second head spacer having a boss portion that is integrated by spot welding with a dummy spring made of the same material as the load spring and having substantially the same thickness, and has a boss portion that can be inserted into the positioning through hole; An adhesive agent applied on the surface excluding the positioning through holes, and the boss portions of the first head spacer and the second head spacer are inserted into the positioning through holes from the opposite sides and fitted. The load spring and the dummy spring are fixed to each other with the adhesive in a state where the tip ends of the arms are sandwiched together. The boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole.
The boss portion of the head spacer is provided substantially at the center of the surface facing the tip portion of the arm. The head spacer is made of the same material as the load spring.

Still another magnetic head positioning device of the present invention has at least one positioning through hole at its tip.
A first head spacer having two bosses, a load spring having a magnetic head mounted thereon, and a boss portion which is integrated by spot welding and can be inserted into the positioning through hole; and the same material as the first head spacer. A spacer plate having the same thickness and an adhesive applied on the surface of the tip of the arm excluding the positioning through hole are provided, and the boss portion of the first head spacer is provided in the positioning through hole. The load spring and the spacer plate are fixed to each other with the adhesive in a state where the tip end of the arm is sandwiched between the load spring and the spacer plate. The boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole. The boss portion of the head spacer is provided substantially at the center of the surface facing the tip portion of the arm. The head spacer is made of the same material as the load spring.

According to still another magnetic head positioning device of the present invention, at least one arm having a through hole for positioning at a tip portion thereof is integrated with a load spring having a magnetic head by spot welding, and the above-mentioned through hole for positioning is provided. A first head spacer having a boss portion that can be inserted into a hole and a dummy spring having the same material as the load spring and having substantially the same thickness are integrated by spot welding, and are made of the same material as the first head spacer. A spacer plate having the same thickness and an adhesive applied on the surface of the tip of the arm excluding the positioning through hole are provided, and the boss portion of the first head spacer is provided in the positioning through hole. The load spring and the dummy spring with the tip of the arm sandwiched. It is fixed by an adhesive. The boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole. The boss portion of the head spacer is provided substantially at the center of the surface facing the tip portion of the arm. The head spacer is made of the same material as the load spring.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, in the first embodiment of the present invention, a first head spacer 1 having a cylindrical boss portion 1A in the central portion and a boss portion of the first head spacer 1 in the central portion are provided. A second head spacer 2 which has a cylindrical boss portion 2A having a diameter slightly larger than 1A, and is made of the same material as the first head spacer 1, and a positioning through hole 31 is formed at the tip end of the voice coil. An arm 3 driven by a driving force generated by a motor and the like, and a magnetic head for reading / writing data at one end are mounted, and the other end is integrated with the first head spacer 1 by spot welding to form a magnetic recording medium. A first load spring 4-1 for applying a load for flying the magnetic head above with an extremely narrow gap;
A magnetic head for reading / writing data is mounted on one end, and the other end is integrated with the second head spacer 2 by spot welding, so that the magnetic head floats above the magnetic recording medium in an extremely narrow gap. A second load spring 4-2 for applying a load, and an adhesive 5 for fixing the tip of the arm 3 and the other ends of the first load spring 4-1 and the second load spring 4-2, respectively. ing. In this embodiment, the first load spring 4-1 and the second load spring 4-2 are made of stainless steel,
The arms 3 are each made of aluminum. The first head spacer 1 and the second head spacer 2 are made of the same stainless steel.

Now, of the plurality of arms 3, the middle arm 3 located in the middle will be described.

First, the first head spacer 1 and the other end of the first load spring 4-1 mounting the magnetic head are integrated by spot welding. Similarly, the second head spacer 2 and the other end of the second load spring 4-2 mounting the magnetic head are integrated by spot welding.

Next, in a state where the adhesive 5 is applied to a predetermined surface of the tip of the intermediate arm 3 excluding the through hole 31 for positioning, the boss portion 1A of the first head spacer 1 and the second head spacer 1 The boss portions 2A of the head spacer 2 are inserted into the positioning through holes 31 from the opposite sides, respectively.
A is fitted to temporarily fix the first load spring 4-1 and the second load spring 4-2 to the tip of the intermediate arm 3.

Further, a jig spacer for keeping the interval between the intermediate arms 3 constant is temporarily fixed to the tip of the intermediate arm 3 by the first load spring 4-1 and the second load spring 4-2. Each intermediate arm 3
The intermediate arm 3 is inserted in between, and a constant load is continuously applied to the tips of the intermediate arms 3 from above and below.

Finally, when the adhesive 5 is sufficiently cured and the first load spring 4-1 and the second load spring 4-2 are fixed to the tip of the intermediate arm 3, the jig spacer is removed. Remove.

Next, the uppermost arm 3 located at the uppermost of the plurality of arms 3 will be described with reference to FIG.

First, the second head spacer 2 and the other end of the second load spring 4-2 mounting the magnetic head are integrated by spot welding.

Next, in a state where the adhesive 5 is applied to a predetermined surface of the tip of the uppermost arm 3 excluding the positioning through hole 31, the boss portion 1A of the first head spacer 1 and the second head spacer 1 The boss portions 2A of the head spacer 2 are inserted into the positioning through holes 31 from the opposite sides, respectively.
The second load spring 4-2 is temporarily fixed to the tip portion of the uppermost arm 3 by fitting with A.

Furthermore, the uppermost arm 3 and the intermediate arm 3
A jig spacer for maintaining a constant interval with is inserted in a state in which the second load spring 4-2 is temporarily fixed to the tip of the uppermost arm 3, and is inserted into the tip of the uppermost arm 3 from above and below. Continue applying a constant load.

Finally, when the adhesive 5 is sufficiently hardened and the second load spring 4-2 is fixed to the tip of the uppermost arm 3, the jig spacer is removed.

The lowermost arm 3 located at the lowermost part of the plurality of arms 3 will be described with reference to FIG.

First, the first head spacer 1 and the other end of the first load spring 4-1 mounting the magnetic head are integrated by spot welding.

Next, in a state where the adhesive 5 is applied to a predetermined surface of the tip portion of the lowermost arm 3 excluding the positioning through hole 31, the boss portion 1A of the first head spacer 1 and the second head spacer 1 The boss portions 2A of the head spacer 2 are inserted into the positioning through holes 31 from the opposite sides, respectively.
The first load spring 4-1 is temporarily fixed to the tip portion of the lowermost arm 3 by fitting with A.

Further, the lowermost arm 3 and the intermediate arm 3
Insert a jig spacer for keeping a constant distance between and with the first load spring 4-1 temporarily fixed to the tip of the lowermost arm 3, and insert the jig spacer from the vertical direction into the tip of the lowermost arm 3. Continue applying a constant load.

Finally, when the adhesive 5 is sufficiently cured and the first load spring 4-1 is fixed to the tip of the lowermost arm 3, the jig spacer is removed.

Therefore, in the first embodiment, the load spring is integrated with the head spacer by spot welding, and the boss portions of the head spacer made of the same material are inserted into the positioning through holes of the arm from the opposite side and fitted. Since the load spring is fixed to the arm with an adhesive at the same time when they are put together, there is no possibility of dust as in the conventional case. Further, since the load spring is fixed to the end of the arm with the head spacer made of the same material, deformation (warping) of the arm due to temperature change can be suppressed. As a result, the flying posture of the magnetic head mounted on the load spring can be stabilized, and the reliability of the magnetic disk device can be further improved.

Next, a second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The intermediate arm 3 of the plurality of arms 3 is similar to that of the first embodiment. Here, the lowermost arm 3 of the plurality of arms 3 will be specifically described.

Referring to FIG. 4, in the second embodiment of the present invention, a first head spacer 1 having a cylindrical boss portion 1A in the central portion, and a boss portion of the first head spacer 1 in the central portion. A second head spacer 2 which has a cylindrical boss portion 2A having a diameter slightly larger than 1A, and is made of the same material as the first head spacer 1, and a positioning through hole 31 is formed at the tip end of the voice coil. The lowermost arm 3 driven by the driving force generated by a motor and the like, and a magnetic head for reading / writing data at one end are mounted, and the other end is integrated with the second head spacer 2 by spot welding to A second load spring 4-applying a load for flying the magnetic head over a recording medium in an extremely narrow gap.
2, a dummy spring 6 made of the same material as the second load spring 4-2 and having the same thickness, a tip portion of the lowermost arm 3, and a second load spring 4-2.
And an adhesive 5 for fixing the dummy spring 6 to each.

First, the second head spacer 2 and the other end of the second load spring 4-2 mounting the magnetic head are integrated by spot welding. Similarly, the first head spacer 1 and the second load spring 4-2 are
The dummy spring 6 made of the same material and having the same thickness is integrated by spot welding.

Next, in a state where the adhesive 5 is applied on a predetermined surface of the lowermost arm 3 excluding the positioning through hole 31, the boss portion 1A of the first head spacer 1 and the second head spacer 1 The boss portions 2A of the head spacer 2 are inserted into the positioning through holes 31 from the opposite sides, respectively.
The dummy spring 6 and the second load spring 4-2 are temporarily fixed to the tip of the lowermost arm 3 by fitting them together with A.

Further, the lowermost arm 3 and the intermediate arm 3
The dummy spacer 6 and the second load spring 4-2 are inserted while the dummy spacer 6 and the second load spring 4-2 are temporarily fixed to the tip of the lowermost arm 3, and the tip spacer of the lowermost arm 3 is inserted. Continue to apply a constant load from above and below.

Finally, when the adhesive 5 is sufficiently cured and the dummy spring and the second load spring 4-2 are fixed to the tip of the lowermost arm 3, the jig spacer is removed.

If the uppermost arm 3 is constructed such that the first load spring 4-1 is used instead of the dummy spring 6 and the dummy spring 6 is used instead of the second load spring 4-2. good.

Therefore, in the second embodiment, the same effect as that of the first embodiment can be obtained, and the uppermost arm or the lowermost arm is made of the same material and has the same material as the load spring on the side where the load spring is not mounted. Since the dummy spring having a thickness is fixed with an adhesive, the deformation (warping) of the uppermost arm or the lowermost arm due to temperature change can be further suppressed, and the flying posture of the magnetic head with respect to the magnetic recording medium can be further stabilized. It becomes possible.

Further, a third embodiment of the present invention will be described with reference to FIG. The intermediate arm 3 of the plurality of arms 3 is similar to that of the first embodiment. Here, the lowermost arm 3 of the plurality of arms 3 will be specifically described.

Referring to FIG. 5, in the third embodiment of the present invention, a second head spacer 2 having a cylindrical boss portion 2A at the center and a through hole 31 for positioning are formed at the tip. A lowermost arm 3 driven by a driving force generated by a voice coil motor and a magnetic head for reading / writing data at one end are mounted, and the other end is integrated with the second head spacer 2 by spot welding. A second load spring 4-2 for applying a load for floating the magnetic head on the magnetic recording medium with an extremely narrow gap,
The surface facing the lowermost arm 3 is formed into a flat surface,
The head spacer 2 has a spacer plate 7 made of the same material, and an adhesive 5 for fixing the tip of the lowermost arm 3 to the second load spring 4-2 and the spacer plate 7, respectively.

First, the second head spacer 2 and the other end of the second load spring 4-2 mounting the magnetic head are integrated by spot welding.

Next, the boss portion 2A of the second head spacer 2 is positioned from below in a state where the adhesive 5 is applied to a predetermined surface of the lowermost arm 3 excluding the positioning through hole 31. The second load spring 4-2 is temporarily fixed to the tip of the lowermost arm 3 by inserting the spacer plate 7 from above at the same time as inserting it into the through hole 31 for use.

Furthermore, the lowermost arm 3 and the intermediate arm 3
A jig spacer for maintaining a constant distance between the second load spring 4-2 and the spacer plate 7 is inserted in a state of being temporarily fixed to the tip of the lowermost arm 3, and the tip of the lowermost arm 3 is inserted. Continue to apply a constant load from above and below.

Finally, when the adhesive 5 is sufficiently cured and the spacer plate 7 and the second load spring 4-2 are fixed to the tip of the lowermost arm 3, the jig spacer is removed.

In the uppermost arm 3, the first head spacer 1 and the first load spring 4-1 are used instead of the spacer plate 7, and the second load spring 4-2 and the second head spacer 2 are used. Instead, the dummy spring 6 may be used instead.

Therefore, in the third embodiment, the same effect as in the first embodiment can be obtained, and the spacer plate made of the same material as the head spacer is adhered to the load spring non-mounting side of the uppermost arm or the lowermost arm. Since it is fixed by the agent, the deformation (warping) of the uppermost arm or the lowermost arm due to temperature change can be further suppressed, and the flying posture of the magnetic head with respect to the magnetic recording medium can be further stabilized.

Finally, a fourth embodiment of the present invention will be described with reference to FIG. The intermediate arm 3 of the plurality of arms 3 is similar to that of the first embodiment. Here, the lowermost arm 3 of the plurality of arms 3 will be specifically described.

Referring to FIG. 6, in the fourth embodiment of the present invention, a second head spacer 2 having a cylindrical boss portion 2A at the center and a through hole 31 for positioning are formed at the tip end. A lowermost arm 3 driven by a driving force generated by a voice coil motor and a magnetic head for reading / writing data at one end are mounted, and the other end is integrated with the second head spacer 2 by spot welding. A second load spring 4-2 for applying a load for floating the magnetic head on the magnetic recording medium with an extremely narrow gap,
The dummy spring 6 made of the same material as the second load spring 4-2 and having the same thickness, and the surface facing the lowermost arm 3 are flat, and are integrated with the dummy spring 6 by spot welding. It has a spacer plate 7 made of the same material as the second head spacer 2, and an adhesive 5 for fixing the tip end of the lowermost arm 3 to the second load spring 4-2 and the dummy spring 6, respectively. .

First, the second head spacer 2 and the other end of the second load spring 4-2 carrying the magnetic head are integrated by spot welding. Similarly, the spacer plate 7 made of the same material as the second head spacer 2 and the dummy spring 6 made of the same material as the second load spring 4-2 and having the same thickness are integrated by spot welding.

Next, the boss portion 2A of the second head spacer 2 is positioned from below in a state where the adhesive 5 is applied to a predetermined surface of the lowermost arm 3 excluding the positioning through hole 31. At the same time when the spacer plate 7 is inserted from above into the through hole 31, the second load spring 4-2 and the dummy spring 6 are temporarily fixed to the tip of the lowermost arm 3.

Furthermore, the lowermost arm 3 and the intermediate arm 3
A jig spacer for keeping a constant distance between the second arm spring 3 and the dummy spring 6 is inserted in a state where the second load spring 4-2 and the dummy spring 6 are temporarily fixed to the tip end portion of the lowermost arm 3, and Continue to apply a constant load from above and below.

Finally, when the adhesive 5 is sufficiently cured and the second load spring 4-2 and the dummy spring 6 are fixed to the tip of the lowermost arm 3, the jig spacer is removed.

In the uppermost arm 3, the first load spring 4-1 and the first head spacer 1 are used in place of the dummy spring 6 and the spacer plate 7, and the second load spring 4-2 and the second load spring 4-2 are used. Instead of the head spacer 2, the dummy spring 6 and the spacer plate 7 may be used.

Therefore, in the fourth embodiment, the same effect as in the first embodiment can be obtained, and the uppermost arm or the lowermost arm on the side where the load spring is not mounted is made of the same material as the load spring and has the same thickness. Since the dummy spring with a head spacer and the spacer plate made of the same material as the head spacer are integrated by spot welding and fixed with an adhesive, deformation (warping) of the uppermost arm or the lowermost arm due to temperature change is further suppressed. Therefore, the flying posture of the magnetic head with respect to the magnetic recording medium can be further stabilized.

In each of the above embodiments, the boss portion 1A of the first head spacer 1 and the boss portion 2A of the second head spacer 2 are each formed in a cylindrical shape.
For example, two plate-shaped members which are erected at a predetermined interval may be used. Further, the diameter of the boss portion 1A of the first head spacer 1 may be slightly larger than the diameter of the boss portion 2A of the second head spacer 2. Furthermore, arm 3
The shape of the positioning through hole 31 may be a round hole or a square hole depending on the shapes of the boss portion 1A and the boss portion 2A.

[0060]

As described above, according to the present invention, the load spring is integrated with the head spacer by spot welding, and the boss portions of the head spacer made of the same material are inserted into the positioning through holes of the arm from opposite sides. Since the load spring is fixed so as to be sandwiched between the arm tips with an adhesive at the same time as it is fitted, the risk of dust is eliminated and head crush is prevented, and the arm is deformed (warped) due to temperature changes. ) Can be suppressed. As a result, the flying posture of the magnetic head mounted on the load spring can be stabilized, and the reliability of the magnetic disk device can be further improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a part of the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing another part of the first embodiment of the present invention.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a third embodiment of the present invention.

FIG. 6 is a sectional view showing a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a part of a conventional magnetic head positioning device.

[Explanation of symbols]

 1 1st Head Spacer 2 2nd Head Spacer 3 Arm 4-1 1st Load Spring 4-2 2nd Load Spring 5 Adhesive 6 Dummy Spring 7 Spacer Plate

Claims (20)

[Claims] 1. An at least one arm having a positioning through-hole at a tip thereof, at least one load spring having a magnetic head mounted thereon, and the load spring, which can be integrated by spot welding, into the positioning through-hole. At least one head spacer having an insertable boss portion and an adhesive applied on a surface of the arm excluding the positioning through hole are provided, and the head spring is integrated with the load spring by spot welding. The load springs are fixed by the adhesive while the boss portions of the head spacers are inserted into and fitted into the positioning through holes from opposite sides and the tip end portion of the arm is sandwiched. Magnetic head positioning device. 2. The magnetic head positioning device according to claim 1, wherein the boss portion of the head spacer is formed into a cylindrical shape, and the positioning through hole of the arm is formed into a round hole. 3. The magnetic head positioning device according to claim 1, wherein the boss portion of the head spacer is provided at a substantially central portion of a surface facing the tip portion of the arm. 4. The head spacer is made of the same material as the load spring.
The magnetic head positioning device described. 5. A first arm having at least one arm having a positioning through hole at its tip and a boss portion insertable into the positioning through hole.
Head spacer, a second head spacer integrated with a load spring having a magnetic head by spot welding, and having a boss portion that can be inserted into the positioning through hole, and the positioning through hole at the tip of the arm. An adhesive applied to the surface excluding the holes, and the boss portions of the first head spacer and the second head spacer are inserted into the positioning through holes from opposite sides and fitted together. A magnetic head positioning device characterized in that the load spring and the first head spacer are fixed to each other with the adhesive while sandwiching the tip of the arm. 6. The magnetic head positioning device according to claim 5, wherein the boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole. 7. The magnetic head positioning device according to claim 5, wherein the boss portion of the head spacer is provided at a substantially central portion of a surface facing the tip portion of the arm. 8. The head spacer is made of the same material as the load spring.
The magnetic head positioning device described. 9. A first boss having at least one arm having a through hole for positioning at its tip, and a load spring having a magnetic head mounted thereon and integrated by spot welding, and having a boss portion insertable into the through hole for positioning. Head spacer, a second spring having the same material as the load spring and a dummy spring having substantially the same thickness by spot welding, and a second head spacer having a boss that can be inserted into the positioning through hole; And an adhesive applied to a surface of the tip portion of the first head spacer and the second head spacer opposite to the positioning through hole. From the load spring and the dummy spring in a state where the tip end of the arm is sandwiched between the load spring and the dummy spring. Magnetic head positioning apparatus characterized in that fixed by the adhesive. 10. The magnetic head positioning device according to claim 9, wherein the boss portion of the head spacer is formed in a cylindrical shape, and the positioning through hole of the arm is formed in a round hole. 11. The magnetic head positioning device according to claim 9, wherein the boss portion of the head spacer is provided substantially in the center of a surface facing the tip end portion of the arm. 12. The magnetic head positioning device according to claim 9, wherein the head spacer is made of the same material as the load spring. 13. A first boss having at least one arm having a through hole for positioning at its tip, and a load spring having a magnetic head mounted thereon and integrated by spot welding, and having a boss portion insertable into the through hole for positioning. A head spacer, a spacer plate made of the same material and having substantially the same thickness as the first head spacer, and an adhesive applied on a surface of the tip of the arm excluding the positioning through hole, The load spring and the spacer plate are fixed by the adhesive in a state where the boss portion of the first head spacer is inserted into the positioning through hole and the tip portion of the arm is sandwiched. Head positioning device. 14. The magnetic head positioning device according to claim 13, wherein the boss portion of the head spacer is formed into a cylindrical shape, and the positioning through hole of the arm is formed into a round hole. 15. The magnetic head positioning device according to claim 13, wherein the boss portion of the head spacer is provided substantially in the center of a surface facing the tip portion of the arm. 16. The magnetic head positioning device according to claim 13, wherein the head spacer is made of the same material as the load spring. 17. A first boss having at least one arm having a through hole for positioning at its tip, and a load spring having a magnetic head mounted thereon and integrated by spot welding, and having a boss portion insertable into the through hole for positioning. A head spacer, a dummy spring having the same material as the load spring and having substantially the same thickness as the load spring, and a spacer plate having the same material as the first head spacer and having the substantially same thickness; and the arm. An adhesive applied to a surface of the tip portion of the first head spacer excluding the positioning through hole, and inserting the boss portion of the first head spacer into the positioning through hole and sandwiching the tip portion of the arm. Magnetic head in which the load spring and the dummy spring are fixed by the adhesive in the state -Decided Me apparatus. 18. The magnetic head positioning device according to claim 17, wherein the boss portion of the head spacer is formed into a cylindrical shape, and the positioning through hole of the arm is formed into a round hole. 19. The magnetic head positioning device according to claim 17, wherein the boss portion of the head spacer is provided substantially in the center of a surface facing the tip portion of the arm. 20. The magnetic head positioning device according to claim 17, wherein the head spacer is made of the same material as the load spring.