JPH08124339A - Mounting structure - Google Patents

Abstract

PURPOSE: To obtain a mounting structure capable of securing the mounting strength even though the thickness of an arm is particularly thin, easily exchanging/repairing a spring and securing the good quality, as to the mounting structure such as for mounting the spring to a head arm of a carriage in a magnetic disk device. CONSTITUTION: This structure is composed of a mounting substrate 6 provided with a mounting hole 9 and a mounting plate 7 provided with a hole 10 having the diameter almost the same as that of the mounting hole 9 while corresponding to the mounting hole 9, whereon plural projecting parts 13 having the dimension smaller than the thickness of the mounting substrate 6 while protruding toward the inside of the hole 10 are formed. Then, the mounting substrate 6 and the mounting plate 7 are piled each other by making centers of the mounting hole 9 and the hole 10 to coincide, and a pressurizing body 12 having the specified diameter is inserted to the hole 10 to press-contact the projecting part 13 to the mounting hole 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a spring on a head arm of a carriage of a magnetic disk device, and more particularly to a spacer for a plurality of springs provided on both sides of a through hole formed in the head arm. The present invention relates to a mounting structure formed by changing the shape of the upper and lower holes or the shape of a protrusion formed on the edge of the hole.

Recently, a magnetic disk device for writing / reading information on / from a magnetic disk by a magnetic head is widely used as a peripheral device of a computer. In such an apparatus, the miniaturization of the magnetic disk has progressed with the progress of high density, large capacity and high speed of the magnetic disk, and the interval between the magnetic disks stacked coaxially has also been reduced.

Along with this, the distance between the springs mounted with the magnetic head mounted on the head arm of the carriage also becomes small, and it is difficult to secure the mounting strength to the head arm by the conventional crimping method.

Therefore, when the head arm is swung to seek a desired position on the magnetic disk, the caulking portion may be loosened due to the impact. Therefore, there is a demand for a method capable of attaching springs to the head arm with a small amount of space while ensuring sufficient strength.

[0005]

2. Description of the Related Art A conventional example will be described below with reference to FIGS. FIG. 19 is a perspective view showing a magnetic disk device, FIG.
0 is a configuration diagram showing a carriage, FIG. 21 is an explanatory diagram showing a conventional example, and FIG. 22 is an explanatory diagram showing problems of the conventional example. The housing 1 is originally sealed with a lid (not shown), but in the figure, the lid is removed to show the inside.

As shown in FIG. 19, a housing 1 accommodates magnetic disks 2a to 2d and a carriage 3 having magnetic heads 4a to 4h at its tips. Although not shown, a motor is arranged below the magnetic disks 2a to 2d, and the magnetic disks 2a to 2d are horizontally rotated in the arrow direction by driving the motor. Further, when the magnetic disks 2a to 2d are stationary, the magnetic heads 4a to 4e come into contact with the respective surfaces, and when the magnetic disks 2a to 2d rotate, the magnetic heads 4a to 4h levitate and face each other with a minute gap.

Head arms 6a to 6e are formed on the carriage 3, springs 5a to 5h are fixed to the head arms 6a to 6e, and magnetic heads 4a to 4h are held at the tips of the springs 5a to 5h.

The carriage 3 is a VCM (Voice Coil).
Motor) M1 drives to swing around the pivot 30. The VCMM1 is composed of a yoke Y, a coil and a magnet (not shown), and is driven by controlling the forward and reverse directions of the current flowing through the coil.

Therefore, the magnetic heads 4a to 4h are reciprocally driven by the swing of the carriage 3 in the radial direction of the rotating magnetic disks 2a to 2d as shown by the arrows, and seek to the target track. Then, the magnetic disks 4a to 4h cause the magnetic disk 2a to
Data is written / read to ~ 2d.

20 (a) and 20 (b) are a side view and a perspective view showing a mounting portion of the springs 5a to 5h of the carriage 3. As shown in FIG. Head arms 6a to 6e are formed on the carriage 3 at the same pitch as the integration pitch of the magnetic disks 2a to 2d, and springs 5a to 5h are attached to the tips of the head arms 6a to 6e together with attachment plates 7a to 7h in attachment holes 9a to 9e. It is fixed.

A gimbal spring is attached to the tips of the springs 5a to 5h.
Magnetic heads 4a to 4h are attached via 8a to 8h. The top and bottom head arms 6a and 6e are provided with springs 5a and 5h only on one side.

Next, the head arms 6a to 6e are provided with springs 5a to 6e.
How to attach 5h
21 (a) to 21 (c) will be described as an example in which b and 5c are attached.

As shown in FIG. 21 (a), the head arm 6b
A mounting hole 9b is formed in the mounting plate, and mounting plates 7b and 7c are fixed to the rear ends of the springs 5b and 5c by spot welding. The springs 5b and 5c and the mounting plates 7b and 7c are provided with holes 10b and 10c at positions corresponding to the mounting holes 9b of the head arm 6b, respectively.
Around the holes 10b, 10c are provided ring portions 11b, 11c having a height less than ½ of the thickness of the head arm 6b and having an outer diameter that can be fitted from the upper / lower surfaces of the mounting hole 9b. (In practice, the ring portions are formed on the mounting plates 7a to 7h, respectively, and the ring portions are fitted in the holes provided in the springs 5a to 5h.) The head arms 6a to 6e are made of an aluminum material. , Springs 5a to 5h, mounting plates 7a to 7h and ring portion 11
b and 11c are made of stainless steel material (for example, SUS material).

Therefore, as shown in FIG. 21 (b), the ring holes 11b of the mounting plates 7b and 7c are inserted into the mounting holes 9b of the head arm 6b.
Insert the 11c into the ring portion 11 as shown in FIG. 21 (c).
By pressing the ball 12a having a diameter larger than the facing distance of the convex portion T on the inner side of b, 11c from one of the holes 10b, 10c and penetrating the ring portion 11b, 11c, the ring portion 11b, 11c is plastically deformed.
The outer surfaces of 11b and 11c can be attached by pressing them against the wall surface of the mounting hole 9b (called a ball caulking method).

Actually, the mounting holes of the head arms 6a to 6e
Insert all the ring parts 11a to 11h of the springs 5a to 5h (mounting plates 7a to 7h) into 9a to 9e, and then insert a comb-shaped jig (not shown) that holds each interval, and The ball 12a is penetrated at once from the head 6a to the head arm 6e.

[0016]

According to the above-mentioned conventional method, the springs 5a to 5h are attached to the tips of the head arms 6a to 6e of the carriage 3 by ball caulking.
Recently, as the speed of magnetic disk devices has increased, miniaturization of the devices has progressed. On the other hand, since the capacity has been increased, the number of stacked magnetic disks has increased, and the thickness and spacing of the magnetic disks have decreased. And with this, the spring
The distance between 5a to 5h becomes smaller, and the head arms 6a to 6h become thinner and smaller. For example, the transition is as follows.

Storage capacity: 240 MB → 500 MB → 1 GB Number of magnetic heads / magnetic disks: 8/4 → 12/6 → 16/8 Head arm thickness: 2.2 mm → 1.6 mm → 1.0 mm Therefore, as shown in FIG. 22 (a), the upper and lower ring portions 11b,
The tips a of the 11c interfere with each other and cannot be fixed. If the height is lowered to avoid the interference, the crimping surfaces of the ring portions 11b and 11c and the mounting hole 9b are reduced, and the springs 5a to 5h are sufficiently secured.
Can not be fixed.

Moreover, if the head arms 6a to 6e are thick, the amount of caulking bites is increased to provide a strong fixing force, but if the head arms 6a to 6e are thin, they cannot withstand the stress of caulking, so the biting must be reduced. The springs 5a-5h cannot be fixed sufficiently.

Further, as shown in FIG. 22 (b) (a), when assembly failure is found after caulking, the springs 5b, 5c and the head arm 6b are separated, the springs are replaced, and the caulking is performed again. Since it is crimped over the entire inner circumference of the mounting hole of the head arm 6b, when inserting the wedge-shaped removal tool from both sides between the head arm 6b and the springs 5b, 5c when separating, (b) As shown by the chain double-dashed line, scratches and burrs are generated on the surface of the head arm 6b, and since it is pryed by the inserted removal tool, the head arm 6b
When stress is applied to 6b, the head arm 6b may be deformed and other obstacles may occur.
Adhesion between 5b and 5c deteriorates, which is a factor of poor quality. There is a problem.

The present invention provides a mounting structure in which the mounting strength of the spring can be secured even when the thickness of the head arm of the carriage is reduced, and the spring can be easily replaced and repaired to ensure quality. Is intended.

[0021]

1 to 7 are principle diagrams of the present invention, FIG. 1 is a principle diagram corresponding to claim 1, FIG. 2 is a principle diagram corresponding to claim 2, and FIG. A principle diagram corresponding to claim 3, FIG. 4 is a principle diagram corresponding to claim 5, and FIG.
Principle diagram corresponding to, FIG. 6 is a principle diagram corresponding to claim 7,
FIG. 7 is a principle view corresponding to claim 9.

1) Means corresponding to claim 1 FIG. 1A is an exploded perspective view, and FIG. 1B is a side sectional view. In the figure, 9 is a mounting hole, 12 is a pressing body, 6 is a mounting substrate having a mounting hole 9, 7 is a mounting plate having a hole 10 corresponding to the mounting hole 9 and a convex portion 13 is formed, and 10 is mounting. A hole formed in the plate 7 and having a diameter substantially equal to that of the mounting hole 9, 13 is a projecting portion formed so as to project toward the inside of the hole 10 of the mounting plate 7 and has a size less than the thickness of the mounting substrate 6. is there.

Accordingly, the mounting substrate 6 and the mounting plate 7 are overlapped with the centers of the mounting holes 9 and 10 aligned with each other, and the pressing member 12 having a predetermined diameter is pressed into the hole 10 to crimp the convex portion 13 into the mounting hole 9. This is the configuration.

2) Means corresponding to claim 2 FIG. 2A is an exploded perspective view, and FIG. 2B is a side sectional view. In the figure, 9 is a mounting hole, 12 is a pressing body, 6 is a mounting substrate having mounting holes 9 penetrating both sides, and 7 is provided with a plurality of holes 10 corresponding to the mounting holes 9. 13 is formed on the mounting plate, 10 is provided on the mounting plate 7, and the mounting hole 9
A hole with a diameter smaller than the specified size, 13 is a hole in the mounting plate 7.
A plurality of pairs of protrusions are provided so as to protrude toward the inside of the substrate 10, have a height that is ½ or less of the thickness of the mounting substrate 6, and are provided so that the facing relationship alternates.

Therefore, one of the mounting holes 9 and the hole 10 of the one mounting plate 7 are overlapped with each other so that the centers of the holes 10 coincide with each other, the pressing body 12 having a predetermined diameter is passed through the hole 10, and the other mounting hole 9 and the other mounting hole 9 are mounted. The holes 10 of the plate 7 are overlapped with each other so that the centers of the holes 10 are aligned with each other,
And the convex portion 13 is bent and crimped to the mounting hole 9.

3) Means Corresponding to Claim 3 FIG. 3 is an exploded side view. In the figure, 9 is a mounting hole,
12 is a pressing body, 6 is a mounting board having mounting holes 9 penetrating both sides, 70 is a hole 10 corresponding to the mounting hole 9,
A first mounting plate having a protrusion 11 having a diameter which can be fitted into the mounting hole 9 at a height equal to or less than the thickness of the mounting substrate 6 around
10 is provided in the first mounting plate 70 and has a diameter smaller than the mounting hole 9 by a predetermined dimension, and 11 is provided in the first mounting plate 70 and the height around the hole 10 is less than the thickness of the mounting substrate 6. Now
A protrusion formed vertically to a diameter that can be fitted into the mounting hole 9, 700 is a second mounting plate having a pin 14 vertically formed at a position corresponding to the center of the mounting hole 9, and 14 is a second mounting plate. A pin provided at 700 and having a diameter less than the thickness of the mounting substrate 6 and larger than the hole 10 by a predetermined dimension.

Therefore, the projection 11 is fitted into one of the mounting holes 9 and the pin 14 is press-fitted into the hole 10 from the other side of the mounting hole 9 to press the projection 11 into the mounting hole 9. According to a fourth aspect of the present invention, in the third aspect, the protrusion 11 has a plurality of slits formed at equal intervals in a radial direction from the center of the hole 10.

4) Means corresponding to claim 5 FIG. 4 (a) is an exploded perspective view, (b) is a side sectional view, and (c) is an explanatory view. In the figure, 9 is a mounting hole, 12 is a pressing body, 6 is a mounting substrate having a mounting hole 9, 7 is a mounting plate having a hole 10 corresponding to the mounting hole 9, and a protrusion 11 formed around the hole 10. , 10 are polygonal holes provided on the mounting plate 7 and having a virtual circumscribing circle having a diameter smaller than the mounting hole 9 by a predetermined dimension,
Reference numeral 11 denotes a polygonal protrusion provided on the mounting plate 7 and having a uniform thickness around the hole 10 and having a height equal to or smaller than the thickness of the mounting substrate 6 and fit into the mounting hole 9.

Therefore, the projection 11 is fitted into the mounting hole 9,
A pressing body 12 having a predetermined diameter is passed through the hole 10 and the protrusion 11 is crimped to the mounting hole 9. 5) Means corresponding to claim 6 Fig. 5 (a) is an exploded side view, (b) is a side sectional view, and (c) is an explanatory view.

In the figure, 9 is a mounting hole, 12 is a pressing body,
6 is a mounting substrate having mounting holes 9 penetrating both sides;
Is provided in plural, and has a hole 10 corresponding to the mounting hole 9,
Mounting plates in which projecting portions 11 are formed around the periphery of 10 in a direction opposite to each other, and 10 are respectively provided in a plurality of mounting plates 7 and are defined by polygons having virtual circumscribing circles having a diameter smaller than the mounting holes 9 by a predetermined dimension. The holes 11, which are displaced by an angle, are provided in the mounting plate 7, and are formed around the hole 10 at a height equal to or less than 1/2 of the thickness of the mounting substrate 6 and perpendicular to a size capable of being fitted into the mounting hole 9. It is a polygonal protrusion.

Therefore, the protrusions 11 of the plurality of attachment plates 7 are fitted on both sides of the attachment hole 9, the pressing body 12 having a predetermined diameter is passed through the hole 10, and the protrusion 11 is crimped to the attachment hole 9. Is.

6) Means corresponding to claim 7 FIG. 6A is an exploded side view, FIG. 6B is a side sectional view, and FIG. 6C is an explanatory view. In the figure, 12 is a pressing body, 9 is a mounting hole of a predetermined shape, 6 is a mounting substrate having the mounting hole 9, 7 is a hole 10 corresponding to the mounting hole 9, and a protrusion 11 is formed around the hole 10. Mounting plate, 10 is provided in the mounting plate 7, and is a hole having a similar shape smaller than the mounting hole 9 by a predetermined dimension, and 11 is the mounting plate 7.
Is a projection portion formed around the hole 10 and having a height equal to or less than the thickness of the mounting substrate 6 and having a shape similar to that of the hole 10 and vertically inserted into the mounting hole 9.

Therefore, the protrusion 11 is fitted into the mounting hole 9,
Insert the pressing body 12 having a shape different from that of the hole 10 into the hole 10
Is crimped to the mounting hole 9. Further, in the eighth aspect, in the seventh aspect, the mounting hole 9 and the hole 10 are formed in a circular shape or an elliptical shape.

8) Means corresponding to claim 9 FIG. 7A is an exploded perspective view, FIG. 7B is a side sectional view, and FIG. 7C is an explanatory view. In the figure, 9 is a mounting hole, 12 is a pressing body, 16 is uneven, 6 is a mounting substrate having a mounting hole 9, 7 is a hole 10 corresponding to the mounting hole 9, and a projection 11 is provided around the hole 10. The formed mounting plate, 10 is provided in the mounting plate 7, a hole having a diameter smaller than the mounting hole 9 by a predetermined dimension, 11 is provided in the mounting plate 7, and the thickness of the mounting substrate 6 is equal and vertical around the hole 10. The size that can fit into the mounting hole 9 at a height below
It is a protrusion having an unevenness 16 formed on the outer periphery.

Therefore, the projection 11 is fitted into the mounting hole 9,
The pressing member 12 having a predetermined diameter is inserted into the hole 10 and the protrusion 11 is crimped to the mounting hole 9. In addition, claim 10 is,
Claim 1, Claim 2, Claim 3, Claim 4, Claim 5,
The width dimension of the mounting substrate 6 and the mounting plate 7 or the width dimension of the mounting substrate 6 and the first mounting plate 70 and the second mounting according to claim 6, claim 7, claim 8 or claim 9. The width dimensions of the plate 700 are set to differ by a predetermined amount.

[0036]

[Action]

1) Operation corresponding to claim 1 When the mounting hole 9 of the mounting substrate 6 and the hole 10 of the mounting plate 7 are aligned and the pressing body 12 is inserted into the hole 10, the convex portion 13 pressed by the pressing body 12 is bent. Since it is plastically deformed and bites into the inner surface of the mounting hole 9 to perform crimping, it is possible to obtain the necessary crimping strength and to secure the crimping strength even if the mounting substrate 6 is thin. Also, the bent protrusion 13
Since only a part of the inner surface of the mounting hole 9 is crimped, it becomes easy to separate the mounting substrate 6 and the mounting plate 7,
It is possible to reduce the bending, burrs, scratches, etc. of the mounting substrate 6 which are likely to occur when the mounting plate 7 is replaced after the defective assembly is found after the assembly.

2) Operation corresponding to claim 2 After aligning one surface of the mounting hole 9 of the mounting substrate 6 with the hole 10 of the mounting plate 7 and inserting and pressing the pressing body 12 into the hole 10,
When the hole 10 of the mounting plate 7 is aligned with the other surface of the mounting hole 9 and the pressing body 12 is inserted into the hole 10, the convex portion 13 pressed by the pressing body 12 is bent and plastically deformed, and the mounting substrate 6 is mounted. Since it digs into the inner surface of the hole 9 and is crimped, the required crimp strength can be obtained, and even when the mounting substrate 6 is thin, the crimp strength can be secured. Further, since the bent convex portion 13 is pressure-bonded only to a part of the inner surface of the mounting hole 9, it becomes easy to separate the mounting substrate 6 and the mounting plate 7, and after the assembly, a defective assembly is found and mounting is performed. When replacing the plate 7, it is possible to reduce the occurrence of bending, burrs, scratches, etc. of the mounting substrate 6.

3) Operation corresponding to claim 3 From one surface of the mounting hole 9 of the mounting substrate 6 to the first mounting plate 70
When the projection 11 of is fitted and the pin 14 of the second mounting plate 700 is press-fitted into the hole 10 from the other side of the mounting hole 9, the projection 11 is plastically deformed and press-fitted into the mounting hole 9. It is possible to obtain the necessary crimping strength without doing so, and it is possible to ensure the crimping strength even if the mounting substrate 6 is thin.

Further, according to the fourth aspect, by providing the protrusion 11 with a plurality of slits, the pin 14 can be easily press-fitted, and the protrusion 11 can be plastically deformed to obtain more reliable crimp strength. Even if the thickness of the mounting substrate 6 is thinner, the pressure bonding strength can be secured.

4) Actions corresponding to claim 5: The mounting hole 9 of the mounting substrate 6 has a polygonal hole 10 in the mounting plate 7.
When a polygonal protrusion 11 having a hole is inserted and a pressing body 12 having a predetermined diameter is passed through the hole 10, the corner of the protrusion 11 bites into the mounting hole 9 due to the plastic deformation of the protrusion 11 and presses it securely. Crimping strength can be obtained.

5) Operation corresponding to claim 6 Polygonal protrusions 11 of a plurality of mounting plates 7 are fitted on both surfaces of the mounting hole 9 of the mounting substrate 6, respectively, and the polygonal holes are displaced from each other by a predetermined angle. When the pressing body 12 having a predetermined diameter is penetrated through 10, the corners of the protrusion 11 bite into the mounting holes 9 by the plastic deformation of the protrusion 11 and pressure is applied, and the stress is evenly applied to the inner circumference to ensure reliable pressure bonding strength. Even if the mounting substrate 6 is thin, the pressure bonding strength can be ensured.

6) Operation corresponding to claim 7: A protrusion having a similar shape to the mounting hole 9 having a predetermined shape of the mounting substrate 6.
11 is inserted, and a pressing body 12 having a different shape from the hole 10 is penetrated into the hole 10 to press the protrusion 11 against the mounting hole 9, the portion of the protrusion 11 pressed by the pressing body 12 is plastically deformed and mounted. By digging into the inner surface of the hole 9 and crimping it, reliable crimping strength can be obtained.

Further, in claim 8, the mounting hole 9 and the hole 10
By forming the shape of a circular shape or an elliptical shape, in the case of a circular shape, an elliptical pressing body 12 having a predetermined major diameter in the hole 10,
In the case of an elliptical shape, the effect of claim 7 can be obtained by penetrating the hole 10 with a circular pressing body 12 having a predetermined diameter.

7) Operation corresponding to claim 9: The mounting hole 9 of the mounting substrate 6 has irregularities 16 on the outer periphery of the mounting plate 7.
When the protrusion 11 having the above is fitted and the pressing body 12 having a predetermined diameter is inserted into the hole 10 to press the protrusion 11 into the mounting hole 9,
Due to the plastic deformation of 11, the unevenness 16 on the outer periphery bites into the inner surface of the mounting hole 9 and crimps, so that reliable crimp strength can be obtained.
Even if the thickness of the mounting substrate 6 is thin, the pressure bonding strength can be ensured.

In the tenth aspect, the width dimension of the mounting board 6 and the width dimension of the mounting plate 7 are set to be different from each other by a predetermined amount. At the time of repair, clamp the overlapping step between the mounting board 6 and the mounting plate 7
Can be removed and the mounting board 6 can be
Can be prevented from being deformed or damaged, and deterioration in quality after repair can be prevented.

[0046]

Embodiments 1 to 6 in which the present invention is applied to the magnetic disk device described in the conventional example will be described below with reference to FIGS. The same reference numerals denote the same objects throughout the drawings.

1) Description of Embodiment 1 Embodiment 1 (corresponding to claim 1, claim 2 and claim 10) will be described with reference to FIGS. 8 and 9. 8 is a configuration diagram showing a first embodiment of the present invention, and FIG. 9 is an explanatory diagram of the first embodiment.

The head arm 6b and the ball 12b shown in FIG.
The mounting substrate 6 and the pressing body 12 shown in FIG. 1 correspond to the springs 5b and 5c and the mounting plates 7b ₁ and 7c ₁ shown in FIG. 8 correspond to the mounting plate 7 shown in FIG.

The structure in which the present invention is applied to the head arms 6a to 6e described in FIG. 20 to attach the springs 5a to 5h,
A case where the spring 5b is attached to the upper surface of the head arm 6b and the spring 5c is attached to the lower surface will be described as an example with reference to FIG. However, since the shape is different from that of the conventional example, the reference numeral may be different.

As shown in FIG. 8 (a), the head arm 6b is
Install springs 5b and 5c from above / below mounting hole 9b
Board 7b₁, 7c₁It is designed to be fixed together with the head
The springs 5b, 5 at the positions corresponding to the mounting holes 9b of the arm 6b.
Mounting plate 7b fixed to c₁, 7c ₁Hole 10b₁, 10c₁Is provided
Have been.

Further, the width dimension of the mounting position of the head arm 6b is set larger than the width dimension of the mounting positions of the springs 5b and 5c and the mounting plates 7b ₁ and 7c ₁ . Mounting plate 7b ₁ ,
Protrusions 13b ₁ , 13b ₂ , 13c ₁ , 13c ₂ are provided at positions facing the inner circumference of the holes 10b ₁ , 10c ₁ of 7c ₁ in directions orthogonal to each other. The height of the convex portions 13b ₁ , 13b ₂ , 13c ₁ , 13c ₂ is set to be slightly smaller than ½ of the thickness of the head arm 6b. The mounting plates 7b ₁ and 7c ₁ are made of SUS material.

With this structure, first, the center of the hole 10b ₁ of the mounting plate 7b ₁ fixed to the spring 5b is aligned with the mounting hole 9b of the head arm 6b, as shown in FIG. 8 (b). When are engaged pass through while pressing the balls 12b having a predetermined diameter to the convex portion 13b _1, 13b ₂ of the hole 10b _1, the convex portion 13b _1, 13b ₂ of the hole 10b ₁ is bent and plastically deformed by the ball 12b , It is crimped to the inner surface of the mounting hole 9b of the head arm 6b.

Next, the center of the hole 10c ₁ of the mounting plate 7c ₁ fixed to the spring 5c is aligned with the mounting hole 9b, and the ball 12b is engaged with the convex portions 13c ₁ and 13c ₂ of the hole 10c ₁ and pressed. When penetrated, the protrusions 13c ₁ and 13c ₂ of the hole 10c ₁ are bent by the ball 12b and plastically deformed, and the mounting hole for the head arm 6b is attached.
Crim the inner surface of 9b.

Here, the diameter of the ball 12b is determined by the convex portions 13b ₁ and 13b.
₂ , 13c ₁ and 13c ₂ are larger than the facing distance and smaller than the diameter of the holes 10b ₁ and 10c ₁ . In this way, the springs 5b and 5c can be attached to the head arm 6b. The same applies to the head arms 6c and 6d. Also, the head arms 6a, 6e have springs 5a, 5h attached to only one side. (In practice, the upper surface of the spring 5b of the mounting holes 9b~9e of the head arm 6b~6e, 5d, 5f, and align the holes 10b ₁ of the mounting plate of 5h, perform caulking by penetrating the ball 12b , Then turn over the head arms 6a-6d,
Top spring 5a of the mounting holes 9a~9f, 5c, 5e, and align the holes 10c ₁ of the mounting plate 5g, performing caulking by penetrating the ball 12b. Therefore, when the ball 12b is penetrated, the protrusions 13b ₁ and 13b
₂ , 13c ₁ and 13c ₂ bend inside the mounting hole 9b and plastically deform, bite into the inner surface of the mounting hole 9b and crimp,
Since the positional relationship between 13b ₁ and 13b ₂ and the convex portions 13c ₁ and 13c ₂ is orthogonal, the bent convex portions 13b ₁ and 13b ₂ and the convex portions 13c ₁ and 13c ₂ do not interfere with each other, and the heads respectively. Since it is possible to reach a position close to the thickness of the arm 6b, it is possible to increase the contact area and increase the pressure bonding strength, and the head arm.
Even if the thickness of 6a to 6e is thin, the pressure bonding strength can be secured.

Also, depending on the width of the mounting position of the head arm 6b.
Springs 5a, 5h and mounting plate 7b ₁, 7c₁Mounting position
Has a small width, and a convex portion is formed on part of the inner circumference of the mounting hole 9b.
13b₁, 13b₂, 13c₁, 13c₂Since it has been crimped,
As shown in, when the assembly is found to be defective after installation,
When removing and replacing the pulling 5b, 5c,
6b, springs 5a and 5h, and mounting plate 7b₁, 7c₁Overlapping
Clamp with a clamp jig using the step of the
And press the pressing tool P of a predetermined length in the upward direction opposite to the time of crimping.
And downward (however, shift up / down at right angles)
Press the convex part 13b₁, 13b₂, 13c₁, 13c₂To push out
More easily, springs 5a, 5h and mounting plate 7b₁, 7c₁To
Detachable, wedge-shaped removal like the conventional method
The mounting board 6b may be deformed or damaged with a
And prevent deterioration of quality after repair.
You can stop.

2) Description of Embodiment 2 Embodiment 2 (corresponding to claim 3) will be described with reference to the configuration diagram of FIG. Head arm 6b and ring portion of FIG.
11C correspond to the mounting substrate 6 and the protrusion 11 of FIG. 2, respectively. The springs 5b and 5c and the mounting plates 7B and 7C of FIG. 10 correspond to the second mounting plate 700 and the first mounting plate 70 of FIG. It corresponds.

The second embodiment is different from the first embodiment described with reference to FIG. 8 in that the pin 14b of the mounting plate 7B is press-fitted into the hole 10c of the ring portion 11C of the mounting plate 7C so that a pressing member such as a ball is pressed. It is a method of mounting without using.

The structure in which the present invention is applied to the head arms 6a to 6e described in the conventional example and the springs 5a to 5h are attached,
An example of mounting the spring 5b on the upper surface of the head arm 6b and the spring 5c on the lower surface will be described with reference to FIG. However, since the shape is different from that of the conventional example, the reference numeral is different.

As shown in FIG. 10 (a), the mounting plate 7B fixed to the spring 5b has a diameter of a predetermined size at a position corresponding to the center of the mounting hole 9b and is slightly shorter than the thickness of the head arm 6b. A pin 14b whose length is rounded at its tip is formed vertically.

The mounting plate 7C fixed to the spring 5c
Has a hole 10C of a predetermined diameter into which the pin 14b is press-fitted, and an outer diameter ring portion which can be fitted into the mounting hole 9b of the head arm 6b.
11C is provided.

Since it has such a configuration, FIG.
As shown in, the ring part 11C of the mounting plate 7C fixed to the spring 5c is fitted from one side of the mounting hole 9b of the bed arm 6b, and the pin 14b of the mounting plate 7B fixed to the spring 5b is inserted into the hole of the ring part 11C from the other side. When pressed into 10C, pin 14b
Is pressed against the hole 10C, and further, the outer circumference of the ring portion 11C expands due to the expansion of the hole 10C pressed by the pin 14b, causing plastic deformation, and the ring portion 11C is pressed against the mounting hole 9b of the head arm 6b.

In this way, the springs 5b and 5c can be attached to the head arm 6b without using a pressing body such as a ball. When attaching the springs 5a, 5h to only one side of the head arms 6a, 6e, although not shown, a ring portion is provided on the attachment plate for fixing the springs 5a, 5h, and the ring portions are attached to the head arms 6a, 6e. Fit in,
It is attached by a method such as penetrating a ball with a specified diameter.

3) Description of Embodiment 3 Embodiment 3 (corresponding to claims 3 and 4) will be described with reference to the exploded side view of FIG.

The third embodiment described with reference to FIG. 10 is the second embodiment.
The difference is that the ring portion is provided with a slit 15 to reduce the pressing force required for press-fitting. That is, as shown in FIG. 11, a plurality of slits 15 are provided in the ring portion 11C 'of the mounting plate 7C' fixed to the spring 5c.

With such a structure, when the pin 14b is press-fitted into the hole 10C of the ring portion 11C ', the pin 14b is pressed into the hole 10C with a smaller pressing force than that in the second embodiment, and the pin 14b is further fixed to the hole 14C. Due to the spread of the pressed hole 10C, the ring part
The outer periphery of 11C 'spreads and is plastically deformed, and the ring portion 11C is crimped to the mounting hole 9b of the head arm 6b. Therefore, the mounting can be easily performed.

4) Description of Fourth Embodiment A fourth embodiment (corresponding to claim 5 and claim 6) will be described with reference to FIGS. 12 and 13. FIG. 12 is a configuration diagram showing a fourth embodiment of the present invention, and FIG. 13 is an explanatory diagram of the fourth embodiment, showing plan sectional views of a mounting portion before and after mounting.

The fourth embodiment differs from the first to third embodiments in that the ring portion fitted into the head arm has a square projection instead of the circular shape. That is, as shown in FIG. 12, the mounting plates 7b ₂ and 7c ₂ fixed to the springs 5b and 5c have mounting holes at positions corresponding to the mounting holes 9b.
9b square hole 10b _2, 10c ₂ of a square having a virtual circumscribing circle of only small diameter predetermined dimension is provided by shifting 45 ° directions as shown more, around the opposite sides of the square hole 10b _2, 10c _2, Square protrusions 11b ₂ and 11c ₂ having a height slightly smaller than ½ of the thickness of the head arm 6b ₁ and a predetermined thickness and having a size that can be fitted into the mounting hole 9b of the head arm 6b ₁ are formed. .

[0068] Therefore, as shown in FIG. 12 (b), when fitting the protruding portion 11b _2, 11c ₂ on both sides of the mounting hole 9b of the head arm 6b, as shown in FIG. 13 (a), the protrusion 11b ₂ , 11c ₂
Oppose each other with a 45 ° offset. Therefore, the ball 12c is placed in the square hole 10
When it is pressed into b ₂ and penetrated, as shown in FIG. 13 (b), the square protrusions 11 b ₂ and 11 c ₂ are plastically deformed and the corners bite into different angular positions on the inner surface of the mounting hole 9 b, respectively. The protrusions 11b ₂ and 11c ₂ are crimped to the mounting hole 9b.

Here, the diameter of the ball 12c is the square hole 10b ₂ , 1.
It is set larger than the inner modulus of 0c ₂ . In this way, the corners of the protrusions 11b ₂ and 11c ₂ are placed at 45 ° of the inner circumference of the mounting hole 9b.
Head arm 6b
Since it can be attached to the mounting plates 7b ₂ and 7c ₂ ,
The pressure bonding stress is uniformly applied to the inner circumference, and the desired mounting strength can be obtained even if the head arm 6b is thin. Moreover, it can be attached with a relatively small pressing force.

5) Description of Embodiment 5 Embodiment 5 (corresponding to claim 7) is shown in FIG. 14 and FIG.
5 will be described. FIG. 14 is a configuration diagram showing a fifth embodiment of the present invention, and FIG. 15 is an explanatory view of the fifth embodiment, showing plan sectional views of a mounting portion before and after mounting.

The fifth embodiment differs from the fourth embodiment in that the square holes of the head arm and the square protrusions of the mounting plate are replaced by similar ellipses. That is, FIG. 14 (a)
As shown in, mounting hole 9b ₁ elliptical having a predetermined major diameter and the minor axis is provided on the head arm 6b _1. Further, the mounting plate 7b _3, 7c ₃ fixed springs 5b, the 5c, elliptical holes 10b _3, 10c ₃ having a predetermined diameter is provided in the mounting hole 9b ₁ and similar in shape to the position corresponding to the mounting hole 9b _1, Elliptical hole 10
b _3, 10c opposed to the periphery on the side of _3, with a thickness slightly smaller height and a predetermined thickness less than half of the head arm 6b _1, mounting hole 9b elliptical can fit into _first protrusion 11b _3, 11c ₃ is formed.

Therefore, as shown in FIG. 14 (b), the projections 11b ₃ and 11c _{3 are} fitted on both sides of the mounting hole 9b ₁ of the head arm 6b ₁ to insert the ball 12d into the elliptical holes 10b ₃ and 10c ₃ . When pressed to penetrate, as shown in (b) from the state of FIG. 15 (a) before crimping, as shown in FIG. 15 (b), both sides of the elliptical protrusions 11b ₃ and 11c _{3 in} the minor axis direction are respectively the inner surfaces of the mounting holes 9b ₁ . It bites into and is plastically deformed, and the projections 11b ₃ and 11c ₃ are crimped to the mounting hole 9b.

Here, the diameter of the ball 12d is the elliptical hole 10
b _3, it is set larger than the shorter diameter of 10c _3. In this way, a desired mounting strength can be obtained even if the thickness of the head arm 6b ₁ is thin.

6) Description of Embodiment 6 Embodiment 6 shown in FIG. 16 (corresponding to claim 7 and claim 8) is the mounting hole of embodiment 5 described in FIG.
9b ₁ , elliptical holes 10b ₃ and 10c ₃ and protrusions 11b ₃ and 11c ₃ are replaced by circular attachment holes 9b, holes 10b ₄ and 10c ₄ and protrusions 11b ₄ and 11c ₄ instead of the elliptical shapes. 16A and 16B are explanatory views of the sixth embodiment and show cross-sectional plan views of a mounting portion before and after mounting.

[0075] Therefore, in the same manner as in Example 5, as shown in FIG. 16 (a), the protrusion of the mounting plate 7b _4, 7c ₄ fixed to the mounting hole 9b of the head arm 6b spring 5b, and 5c
Insert 11b ₄ and 11c ₄ into holes 10b ₄ and 10c as shown in (b).
By inserting and pressing the pressing tool 12e having a cross section shown in FIG. ₄ by hatching in FIG. ₄ and causing the protrusions 11b ₄ and 11c ₄ to bite into the inner surface of the mounting hole 9b and crimping, the same effect as that of the fifth embodiment is obtained. To be

7) Description of Embodiment 7 Embodiment 7 (corresponding to claim 9) will be described with reference to FIGS.
8 will be described. FIG. 17 is an exploded perspective view showing a sixth embodiment of the present invention, and FIG. 18 is an explanatory view of the sixth embodiment, showing plan sectional views of a mounting portion before and after mounting.

The seventh embodiment differs from the fourth, fifth and sixth embodiments in that the mounting hole of the head arm is a round hole and tooth-shaped irregularities are formed on the outer periphery of the protrusion of the mounting plate. Is.

That is, as shown in FIG. 17, the spring 5
The mounting plates 7b ₅ and 7c ₅ fixed to b and 5c have holes 10c _{5 of a} predetermined diameter at positions corresponding to the mounting holes 9b, and 1/2 of the thickness of the head arm 6b is provided around the opposite side. A slightly smaller height, with a diameter that allows it to fit into the mounting hole 9b, and tooth-shaped irregularities on the outer circumference.
Protrusions 11b ₅ and 11c ₅ on which 16a and 16b are formed are provided.

Therefore, as shown in FIG. 18 (a), the protrusions 11b ₅ and 11c ₅ are fitted on both sides of the mounting hole 9b of the head arm 6b, and the ball 12f is pressed into the holes 10b ₅ and 10c ₅ . As shown in (b), the protrusions 11b ₅ and 11c ₅ have unevenness 16a,
16b bite into the inner surface of each mounting hole 9b and plastically deform,
The protrusions 11b ₅ and 11c ₅ are crimped to the mounting hole 9b.

Here, the diameter of the ball 12e is equal to that of the holes 10b ₅ and 10c.
It is set larger than the diameter of ₅ . In this way,
Even if the thickness of the head arm 6b is thin, desired mounting strength can be obtained.

In the first embodiment described above, the width of the head arm 6b is set larger than the width of the springs 5b and 5c, but the width of the head arm 6b may be set smaller than the width of the springs 5b and 5c. . In this case, the springs 5b and 5c will be clamped at the time of separation for repair.

In the second to seventh embodiments, the first embodiment is also used.
Of course, a method of making a difference between the width of the head arm and the width of the spring can be applied in the same manner as in. In the above-described first and second embodiments, the case where the convex portion is formed at the position opposite to the hole of the mounting plate has been described, but the concave portion may be formed. In this case, the hole is formed smaller by a predetermined dimension. The part other than the concave part is bent and attached.

In the first, fourth, fifth and seventh embodiments described above, the case where the pressing body is caulked has been described. However, the ball may be an elliptic spherical shape, and another method, for example, a spherical tip is used. Alternatively, a method using a conical spindle may be used.

Further, the case where the mounting plates fixed to the springs are mounted on both sides of the head arm, that is, the mounting plate is mounted on the thin plate having the mounting holes penetrating therethrough, is explained on one side of the thick plate having the blind holes. The same can be applied to the case of mounting the mounting plate. In this case, the method of crimping with the spindle is suitable.

Although the square holes 10b ₂ and 10c ₂ and the protrusions 11b ₂ and 11c ₂ are squares in the fourth embodiment, other regular polygons such as regular triangles or regular pentagons may be used. good.

[0086]

As described above, according to the present invention, in claim 1, the convex portion pressed by the pressing body is bent and plastically deformed, and it bites into the inner surface of the mounting hole and crimps. The strength can be obtained, and the crimping strength can be secured even if the thickness of the mounting substrate is thin.
Since the bent convex part is crimped only on a part of the inner surface of the mounting hole, it becomes easy to separate the mounting board and the mounting plate, and when the mounting defect is found after assembly and the mounting plate is replaced, It is possible to reduce the occurrence of bending, burrs and scratches on the mounting substrate.

According to the second aspect, the convex portion pressed by the pressing body is bent and plastically deformed, and it bites into the inner surface of the mounting hole of the mounting substrate and crimps it. Even if the thickness is thin, the pressure bonding strength can be secured. Also, since the bent convex portion is crimped only to a part of the inner surface of the mounting hole, it becomes easy to separate the mounting board and the mounting plate, and the mounting defect is found after assembly and the mounting plate is replaced. Occasionally, it is possible to reduce the occurrence of bending, burrs, scratches, etc. of the mounting substrate.

According to the third aspect, the mounting plate can be easily mounted without using a pressing body such as a ball, and the mounting plate can be mounted on the mounting substrate even if the mounting substrate is thin.

According to the present invention, the slit facilitates press-fitting of the pin, and more reliable crimp strength can be obtained.
Even if the thickness of the mounting substrate is thinner, the pressure bonding strength can be secured.

According to the fifth aspect, when the pressing body is passed through the polygonal hole, the polygonal protrusion is deformed and the corners of the protrusion bite into the mounting hole for crimping to obtain a reliable crimping strength. Therefore, even if the thickness of the mounting substrate is thin, the pressure bonding strength can be secured.

In the sixth aspect, since the positions where the corners of the protrusions of the plurality of mounting plates bite into the mounting holes are deviated by a predetermined angle on the inner circumference, the crimping stress is uniformly applied to the inner circumference. The effect of is obtained.

In the seventh aspect, the portion of the protrusion pressed by the pressing body is deformed and bites into the inner surface of the mounting hole to be crimped,
A reliable crimp strength can be obtained, and the crimp strength can be secured even if the thickness of the mounting substrate is thin.

According to the eighth aspect of the present invention, the elliptical pressing body having a predetermined major diameter is inserted into the hole when the circular shape is inserted, and the circular pressing body having the predetermined diameter is inserted into the hole when the elliptical shape is formed. The effect can be obtained.

According to the ninth aspect, the unevenness on the outer periphery of the protrusion bites into the inner surface of the mounting hole to perform crimping, and reliable crimping strength can be obtained. According to the tenth aspect of the present invention, when repairing a mounting defect which is found after the mounting plate is mounted on the mounting substrate, the mounting plate can be removed by clamping the stepped portion where the mounting substrate and the mounting plate overlap, and mounting with a removal tool. It is possible to prevent the substrate from being deformed or damaged, and to prevent quality deterioration after repair.
There is an effect.

[Brief description of drawings]

FIG. 1 is a principle diagram corresponding to claim 1 of the present invention.

FIG. 2 is a principle diagram corresponding to claim 2 of the present invention.

FIG. 3 is a principle diagram corresponding to claim 3 of the present invention.

FIG. 4 is a principle diagram corresponding to claim 5 of the present invention.

FIG. 5 is a principle diagram corresponding to claim 6 of the present invention.

FIG. 6 is a principle diagram corresponding to claim 7 of the present invention.

FIG. 7 is a principle diagram corresponding to claim 9 of the present invention.

FIG. 8 is a configuration diagram showing a first embodiment of the present invention.

FIG. 9 is an explanatory diagram of the first embodiment.

FIG. 10 is a configuration diagram showing a second embodiment of the present invention.

FIG. 11 is an exploded side view showing a third embodiment of the present invention.

FIG. 12 is a configuration diagram showing a fourth embodiment of the present invention.

FIG. 13 is an explanatory diagram of Example 4.

FIG. 14 is a configuration diagram showing a fifth embodiment of the present invention.

FIG. 15 is an explanatory diagram of the fifth embodiment.

FIG. 16 is an explanatory diagram showing Embodiment 6 of the present invention.

FIG. 17 is an exploded side view showing the seventh embodiment of the present invention.

FIG. 18 is an explanatory diagram of Example 7.

FIG. 19 is a perspective view showing a magnetic disk device to which the present invention is applied.

FIG. 20 is a configuration diagram showing a carriage.

FIG. 21 is an explanatory view showing a conventional example.

FIG. 22 is an explanatory diagram showing the problems of the conventional example.

[Explanation of symbols]

6 is a mounting board, 6a to 6e, 6b ₁ is a head arm,
7,7a ~7h, 7b ', 7c' , 7b 1 ~7b 3, 7c 1 ~7c 3, 7b 5, 7c 5,
7B and 7C are mounting plates, 9 and 9a to 9e and 9b ₁ are mounting holes, and 10 and 10
b, 10c, 10b ₁ , 10b ₄ , 10b ₅ , 10c ₁ , 10c ₄ , 10c ₅ are holes, 10b ₂ ,
10c ₂ is a square hole, 10b ₃ and 10c ₃ are elliptical holes, 11, 11b _{2 to} 11b
₅ , 11c _{2 to} 11c ₅ are protrusions, 11b, 11c, 11C and 11C 'are ring portions, 12 is a pressing body, 12a to 12d, 12f
Is a ball, 12e is a pressing tool, 13,13b ₁ , 13b ₂ , 13c ₁ 13c ₂ is a convex portion, 14,14b is a pin, 15 is a slit, 16,16a, 16b is an uneven surface, 70 is a first mounting plate, 700 is the second mounting plate

Claims (10)

[Claims] 1. A mounting board having a mounting hole, and a plurality of holes corresponding to the mounting hole and having a diameter substantially equal to that of the mounting hole, projecting toward the inside of the hole and having a size smaller than the thickness of the mounting board. And a mounting plate having a convex portion formed thereon, the mounting hole and the center of the hole are aligned, the mounting substrate and the mounting plate are overlapped, and a pressing body having a predetermined diameter is pressed into the hole to project the convex portion. A mounting structure characterized in that the part is bent and crimped into the mounting hole. 2. A mounting board having a mounting hole penetrating both sides, and a hole corresponding to the mounting hole and having a diameter substantially equal to that of the mounting hole. The mounting board projects toward the inside of the hole and has a thickness of the mounting board. And a plurality of mounting plates each having a convex portion having a height of ½ or less formed so that the facing relations alternate with each other, and one of the mounting holes and one mounting plate of the plurality of mounting plates. The centers of the holes are overlapped with each other, a pressing body having a predetermined diameter is passed through the hole, the centers of the other mounting holes and the holes of the other mounting plates are aligned with each other, and the pressing body is passed through the hole. A mounting structure characterized in that the convex portion is bent and crimped to the mounting hole. 3. A mounting board having mounting holes penetrating both sides, and a hole corresponding to the mounting hole and having a diameter smaller than the mounting hole by a predetermined dimension, and having a thickness not greater than the thickness of the mounting board around the hole. A first mounting plate vertically formed with a protrusion having a diameter that can be fitted into the mounting hole at a height of, and at a position corresponding to the center of the mounting hole and having a height less than the thickness of the mounting substrate A second mounting plate in which a pin having a diameter larger than that of the mounting hole is formed vertically, the projection is fitted into one of the mounting holes, and the pin is press-fitted into the hole from the other mounting hole. A mounting structure characterized in that the protrusion is crimped into the mounting hole. 4. The mounting structure according to claim 3, wherein the protrusion has a plurality of slits radially formed from the center of the hole in the height direction at equal intervals. 5. A mounting substrate having a mounting hole, and a polygonal hole corresponding to the mounting hole and having a virtual circumscribing circle having a diameter smaller than the mounting hole by a predetermined dimension, and having a uniform thickness around the hole. A mounting plate having vertically formed polygonal protrusions that can be fitted into the mounting holes at a height equal to or less than the thickness of the mounting substrate, and the protrusions are fitted into the mounting holes, and the holes have a predetermined diameter. A mounting structure in which a pressing body is inserted and the protrusion is crimped to the mounting hole. 6. A mounting substrate having mounting holes penetrating both sides, and a polygonal hole corresponding to the mounting hole and having a virtual circumscribing circle smaller than the mounting hole by a predetermined dimension and being offset from each other by a predetermined angle. A plurality of mounting plates each having a polygonal protrusion that is equal in thickness around the hole and that can be fitted into the mounting hole at a height not more than ½ of the thickness of the mounting substrate and is formed perpendicularly to the opposite direction; A mounting structure characterized in that the projections of the plurality of mounting plates are fitted into both sides of the mounting hole, and a pressing body having a predetermined diameter is passed through the holes to crimp the projections into the mounting hole. 7. A mounting board having a mounting hole having a predetermined shape, and a similar hole corresponding to the mounting hole and having a size smaller than the mounting hole by a predetermined dimension, and having a thickness not more than the thickness of the mounting board around the hole. At the height of the hole and a mounting plate in which a protrusion that is concentrically similar to the hole and that can be fitted into the mounting hole is formed vertically, and the protruding portion is fitted into the mounting hole, and a pressing body having a shape different from that of the hole is formed. The mounting structure is characterized in that it is inserted into and is pressed into the mounting hole. 8. The mounting structure according to claim 7, wherein the mounting hole and the hole are formed in a circular shape or an elliptical shape. 9. A mounting board having a mounting hole, and a hole corresponding to the mounting hole and having a diameter smaller than the mounting hole by a predetermined dimension, and mounted around the hole at a height not more than the thickness of the mounting board. It is composed of a mounting plate in which a protrusion having a diameter that can be fitted into the hole and having irregularities on the outer periphery is formed vertically, and the protrusion is fitted into the mounting hole, and a pressing body having a predetermined diameter is inserted into the hole for mounting. A mounting structure characterized by crimping a protrusion on the hole. 10. A width dimension of the mounting substrate and a width dimension of the mounting plate, or a width dimension of the mounting substrate and a width dimension of the first mounting plate and the second mounting plate differ by a predetermined amount. The mounting structure according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, claim 8 or claim 9.