JPS628357A - Assembling method for magnetic disc device - Google Patents

Abstract

PURPOSE:To attain an efficient assembling work by fitting a spacer ring formed with a sufficient recess at the inner face to avoid a projected stripe of a rotary shaft, turning the shaft after fitting and assembling them so that the inner diameter of the outer spacer ring is the outer diameter of the projected stripe of the rotary shaft. CONSTITUTION:In fitting the spacer ring 5 to a spindle housing 3, the spacer ring is fitted freely at a position where the projected stripe 31 of the housing 3 and the recess 51 on the spacer ring 51 are coincident and the spacer ring 5 is fitted to the spindle housing 3 easily without a gap by turning the spacer ring 5 until a position where the outer diameter 32 of the projected stripe 31 of the spindle housing 3 and the inner diameter 52 of the spacer ring 3 are not coincident. Thus, a fault due to generation of metallic powder by meshing between the spindle housing 3 and the spacer ring 5 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a method for assembling a magnetic disk drive in which magnetic disks are stacked with a spacing ring interposed therebetween. The spacing ring can be easily inserted by rotating the spacing ring to a position where the protrusion on the spindle housing and the recess on the spacing ring do not match, thereby preventing the spindle housing and the spacing ring from getting stuck or scratched when inserted. To prevent.

[Industrial application field]

The present invention relates to a method of assembling a magnetic disk device in which magnetic disks for recording magnetic data are stacked.

Magnetic disk drives record/reproduce large amounts of magnetic data, are frequently used, and have complex device configurations. Therefore, it is important to be able to assemble them easily and to prevent foreign matter generated during assembly from preventing magnetic data recording/reproduction. There is a demand for a magnetic disk device of consistently high quality.

[Conventional technology]

FIG. 4 is a diagram explaining the conventional technology, and FIG. 4(a)
4 is a cross-sectional view of the structure of the magnetic disk device, and FIG. 4 is a top cross-sectional view showing the spacing ring inserted into the spindle housing.

In the figure, 21 is a magnetic disk for recording magnetic data, 22 is a magnetic head for recording/reproducing magnetic data on the magnetic disk 21, and 23 is a rotating shaft for rotatably supporting the magnetic disk 21. The spindle housing 24 is a spacing ring inserted into the spindle housing 23 to create a space between which the magnetic disks 21 can be stacked and a magnetic head 22 can be inserted between the magnetic disks.

If the spacing ring 24 is loosely fitted into the spindle housing 23, when the magnetic disk 21 is rotated, the spacing ring 24 will move slightly due to rotational vibration, etc.
The magnetic disk 21 that is in contact with the magnetic disk 4 will also be slightly moved. Since the flying height of the magnetic head 22 with respect to the magnetic disk 21 is very small, there is a risk that the magnetic disk 21 and the magnetic helad 22 will come into contact with each other due to the above-mentioned slight movement, damaging the magnetic disk and the magnetic head. Therefore, as shown in FIG. 4(b), a small gap is formed between the outer diameter of the protruding portion of the spindle housing 23 and the inner diameter d of the spacing ring 24, thereby eliminating slight movement of the magnetic disk 21. The magnetic disk 21 comes into contact with the tilted magnetic head 22.
These were vertically and tightly inserted into the spindle housing 23 to prevent damage to the components.

[Problem that the invention seeks to solve]

When inserting the spacing ring 24 into the ring 23, the spacing ring 24 and the spindle housing 23 may be damaged due to meshing or sliding contact with the spindle housing 23 due to the thin thickness relative to the inner diameter. In this case, the plating or the like may peel off to produce metal pieces, which, if interposed between the magnetic disk 21 and the magnetic head 22, may cause the damage described above. In this way, it is very difficult to insert the spacing ring 24 into the spindle housing 23 without damaging it.

The present invention has been made in consideration of these points, and an object of the present invention is to provide a method for assembling a magnetic disk device that allows a spacing ring to be easily and effortlessly inserted into a spindle housing, and that does not cause troubles due to foreign matter. be.

[Means for solving problems]

FIG. 1 is a diagram showing the causes caused by the method of the present invention.

In the figure, 1 is a magnetic disk, 2 is a spindle housing which is a rotating shaft for rotatably supporting the magnetic disk 1, and 3 is a spacing ring for stacking the magnetic disks 1 at predetermined intervals.

When inserting the spacing ring 5 into the spindle housing 3, the protrusion 31 of the spindle housing 3 and the recess 51 of the spacing ring 5 should be fitted loosely at a matching position, and then the outer diameter of the protrusion 31 of the spindle housing 3 should be adjusted. 32 and the inner diameter 52 of the spacing ring 3 [Operation] The inner diameter of the recess of the spacing ring 5 is made sufficiently larger in both width than the outer diameter of the protrusion 31 of the spindle housing 3, Loose fitting is possible at the position where the outer diameter of the protrusion 31 of the spacing ring 5 and the protrusion of the spindle housing 3 meet, and then the position where the fitting inner diameter 52 of the spacing ring 5 and the protrusion of the spindle housing 3 meet. When the spacing ring 3 is rotated until the spacing ring 3 is rotated, the spindle housing 3 and the spacing ring 5 are properly fitted.

Therefore, in the present invention, it is possible to easily insert the spacing ring 5 into the spindle housing 3, and it is possible to prevent problems caused by the generation of metal powder due to the engagement of the spindle housing 3 and the spacing ring 5.

〔Example〕

Hereinafter, the present invention will be specifically explained in detail by way of examples with reference to the drawings.

FIG. 2 is a diagram for explaining one embodiment of the method of the present invention. FIG. 3 is a top sectional view showing a state in which a spacing ring is inserted into a spindle housing.

In the figure, 1) is a magnetic disk, 12 is a magnetic head,
13 is a spindle housing for rotatably supporting the magnetic disk 1), and 15 is a spacing ring.

As shown in FIG. 2 (bl), the width B is determined by providing the spacer ring 14 with a recess 16 having an inner diameter diO that is sufficiently larger than the outer diameter of the protrusion 17 of the spindle housing 13.

Regarding b, it is also assumed that B<b. Spindle housing 13
The outer diameter of the protruding portion 15 and the reference inner diameter d of the spacing ring 14 have a predetermined fitting dimension relationship.

A loose fit is possible at a position where the protrusion 15 of the spindle housing 13 and the recess 16 of the spacing ring match, and a fitted state is achieved at a position where the protrusion 15 of the spindle housing 13 and the spacing ring 16 do not match, making assembly easier. In this case, the protrusion 15 of the spindle housing 13 and the spacing ring 1
It is easy to match and insert the recesses 16 of No. 4,
After that, the spacing ring 1 is moved to a position where the inner diameter d of the spacing ring 14 is aligned with the outer diameter of the protrusion 15 of the spindle housing 13.
Rotate 4.

By easily inserting the spacing ring into the spindle housing 13 as described above and rotating it, a suitable fitted state can be achieved.

FIG. 3 shows another embodiment of the method of the present invention, and is a top sectional view showing a state in which a spacing ring is inserted into a spindle housing. In order to simplify the explanation, the same parts as in FIG. 2 are given the same reference numerals.

The difference between FIG. 3 and FIG. 2 is the spacing ring 14.
Since one of the side surfaces 18a of the recess is formed at a gentle angle of inclination so as to expand toward the inner diameter surface, it is easier to achieve an accurate fitting state between the outer diameter and the inner diameter d.

It is of course possible to form the above inclination angle on both sides.

〔Effect of the invention〕

As described above, the method of the present invention can prevent problems such as scratches, generation of metal powder, and scratches, thereby improving quality and is practical and useful.

The same applies not only when assembling but also when removing the spacing ring.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram for explaining the method of the present invention, FIG. 2 is a diagram for explaining one embodiment of the method of the present invention, FIG. 3 is a diagram for explaining another embodiment of the method of the present invention, FIG. 4 is an explanatory diagram of the prior art. In the figure, 1.1) is a magnetic disk, 2.13 is a spindle housing, and 3.15 is a spacing ring. nereigo 8me katashiyari-rhobo ite 1n word hall E1) 1cho 3
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Claims (1)

[Claims] 1. Rotating shaft (3) having a plurality of convex outer diameters in the direction of the outer circumferential axis
The magnetic disks (
In a magnetic disk device in which 1) is stacked, a spacing ring (5) having a recess (51) formed on the inner surface sufficient to avoid the protrusion (31) of the rotating shaft (3) is inserted, and after being inserted outward, the spacing ring (5) is rotated. so that the inner diameter of the outer spacing ring (5) is aligned with the rotating shaft (3).
) A method for assembling a magnetic disk device, characterized in that the magnetic disk device is assembled so that the protruding stripes are located at the outer diameter position. 2. The side of the recess has an inclined surface (1
8) A method for assembling a magnetic disk device according to claim 1, characterized in that: