JP2502802Y2 - Fixed magnetic disk unit - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed magnetic disk device, and more particularly to a miniaturized fixed magnetic disk device.

[0002]

2. Description of the Related Art FIG. 5 shows the internal structure of a conventional fixed magnetic disk device.

In this fixed magnetic disk device 1, a magnetic disk 3 rotating at a high speed inside a case 2 made of an aluminum alloy die casting and a magnetic disk 3 floating while being suspended by a thin air film formed by the rotation of the magnetic disk 3. The magnetic head 4 and the like write a signal on the top and read it.

In the fixed magnetic disk device 1, a VCM (voice coil magnet) yoke 5 for moving and scanning the magnetic head 4 and an air filter 6 for filtering the circulating air inside the case 2 are provided inside the case 2. Are placed close to each other. The mounting position of the air filter 6 is on the downstream side of the air flow generated by the rotation of the magnetic disk 3 with respect to the position of the magnetic head 4. Therefore, the air flow that has passed through the magnetic head 4 passes through the air filter 6 before being returned to the magnetic head 4 again, and is filtered so that clean air passes through the magnetic head 4.

The air filter 6 is formed by wrapping a cotton strip filter material with a cloth, and has a flat quadrangular shape with a bulged central portion.

Both sides of the air filter 6 are attached to the case 2
Projecting portions 2a and 2 formed to project from the bottom of the
It is inserted and locked in the groove portions 2c and 2d of b.

[0007]

In recent years, the fixed magnetic disk drive has been required to be further miniaturized, and in order to achieve the miniaturization, it is necessary to arrange each component in the magnetic disk more efficiently.

In the fixed magnetic disk device as described above, the size can be reduced by bringing the magnetic disk and the VCM yoke closer to each other, which is located between the magnetic disk and the yoke shown in FIG. It is necessary to downsize the protruding portions 2a and 2b for locking the air filter.

FIG. 6 is an enlarged plan view showing a protruding portion for locking the air filter in FIG. In the figure,
If the protrusions 2a and 2b are to be downsized, the widths of the locking grooves 2c and 2d of the air filter 6 cannot be reduced, so that the end 2e which is a part of the protrusions 2a and 2b and There is no choice but to reduce the width of 2f.

However, the protruding portions 2a and 2b are formed in the case 2
Since it is integrally die cast,
There is a problem that molding of e and 2f becomes difficult.

The present invention has been made in view of the above problems.
An object of the present invention is to provide a fixed magnetic disk device in which a protruding portion for locking an air filter is downsized and the entire device is downsized.

[0012]

Means for Solving the Problems The above-mentioned problems are solved by a magnetic disk, a motor for rotating the magnetic disk, a magnetic head for writing a signal on the magnetic disk and reading the signal, and a magnetic head for moving the magnetic head. In a fixed magnetic disk device having a drive unit and an air filter for filtering an air flow generated by the rotation of the magnetic disk, the air filter is fixed to a side wall of a protruding portion of a housing of the device and the housing. The problem is solved by adopting a structure in which it is locked by a part of the constituent parts of the drive section.

[0013]

In the present invention, the side wall of the protruding portion of the housing and a part of the existing components are used for locking the air filter. The protruding part for stop is made small, and this protruding part is located,
The space between the magnetic disk and the existing components can be saved.

[0014]

1 is a diagram showing the internal construction of an embodiment of the present invention, FIG. 2 is an enlarged perspective view showing an air filter mounting portion, which is a main portion thereof, and FIG. 3 is a portion showing the portion shown in FIG. FIG. 4 is an enlarged perspective view, and FIG. 4 is an enlarged view of the IV-IV cross section of FIG. 1.

In FIG. 1, a single magnetic disk 3 is
It is attached to a motor (not shown) attached to the case 7, and is incorporated in a space formed by combining the case 7 and the upper case 11 (partly shown in FIG. 4).

When the magnetic disk 3 rotates at high speed in the direction of arrow A, an air flow along the rotation is generated on the upper surface and the lower surface of the magnetic disk 3.

In the case 7 and the upper case 11,
An air guide channel (not shown) is formed so that the air flow passes through the air filter 8 as shown by arrow B. The air filter 8 is formed by wrapping a cotton filter member with cloth, and has a square shape with one corner removed to fit the shape of the upper case, as shown in FIG. It is shaped like a more expanded thin plate.

The air flow indicated by the arrow B is filtered when passing through the air filter 8 to remove dust harmful to the operation of the magnetic head.

Here, one side of the air filter 8 is inserted into a groove portion 7c provided on a side portion of the case 7, and two pieces are provided at the bottom of the case 7 so that one side of the air filter 8 is sandwiched. The cylindrical projection 7d is formed integrally with the case 7. The cylindrical projection 7d is slightly higher than the bottom surface so as not to obstruct the air flow.

A side portion near one of the opposite sides of one side of the air filter 8 inserted into the groove portion 7c is close to the outer periphery of the disk 3 and is integrally formed with the case 7 to form a protruding portion 7.
It is sandwiched by the notch portion 7b of a and the corner portion 9a of the yoke 9.

As described above, the air filter 8 is substantially orthogonal to the air flow passage because the three sides of the side and bottom are sandwiched by the portion integrally formed with the case 7 and the corner 9a of the yoke 9. And is adapted to filter the internal circulating air.

The air filter locking portion of the conventional example shown in FIG. 6 and the air filter locking portion of this embodiment shown in FIG. 2 will be described in comparison.

Instead of the protruding portion 2b of the conventional example shown in FIG. 6, in this embodiment, the groove portion 7 is formed on the inner side wall of the case 7.
c is formed. The groove portion 7c formed on the side wall requires less finely processed portion of the die than the provision of the protruding portion 2b, and therefore has the effect of facilitating the die production.

Further, in this embodiment, a portion of the protruding portion 7a for locking the air filter 8 is provided from the groove portion only in the notch portion 7a which is easy to mold, and is arranged close to the side wall of the notch portion 7a. It can be seen that the corner portion 9a of the yoke 9 and the side wall of the cutout portion 7a fulfill the same function as the groove portion 2c of the protruding portion 2a of the conventional example.

As described above, in this embodiment, no groove is provided in the protruding portion 7a, and only the cutout portion 7a is formed.
Since the end portion 2e in FIG. 2 is omitted, the size of the protruding portion 7a is reduced, and the yoke 9 can be disposed closer to the disk 3, so that the device itself can be downsized by the amount of the proximity. Became.

[0026]

As described above, according to the present invention, the space of the air filter retaining portion is reduced by utilizing the existing components as a part of the air filter retaining portion.

As a result, the magnetic disk and the above-mentioned components can be arranged closer to each other, and the overall size of the apparatus can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of the present invention.

FIG. 2 is an enlarged plan view of an essential part of the present invention.

FIG. 3 is an enlarged perspective view of an essential part of the present invention.

FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.

FIG. 5 is a plan view showing a configuration of a conventional example.

FIG. 6 is an enlarged plan view of a main part of a conventional example.

[Explanation of symbols]

 3 magnetic disk 4 magnetic head 7 case 7a protruding portion 7b notch portion 7c groove portion 7d cylindrical protrusion 8 air filter 9 yoke 9a corner portion 12 fixed magnetic disk device

Claims (1)

(57) [Scope of utility model registration request] 1. A magnetic disk, a motor for rotating the magnetic disk, a magnetic head for writing a signal on the magnetic disk and reading the signal, a drive unit for moving the magnetic head, and the magnetic disk. A fixed magnetic disk device having an air filter for filtering an air flow generated by the rotation of the air filter, the air filter comprising: a side wall of a projecting portion of a casing of the device and a component of the drive unit fixed to the casing. A fixed magnetic disk device having a structure that is locked by a part of the.