JPH07320474A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To obtain a magnetic disk device which can maintain high quality for a long time without being affected by temperature variation in an used place. CONSTITUTION:This device is provided with a spindle motor mechanism 1 mounting a magnetic disk 2, a head positioning mechanism 3 mounting a magnetic head 3A opposed to the magnetic disk 2, a base 4 and a cover 5 isolating these mechanisms from the open air, and a seal rubber 6 is mounted between the base 4 and the cover 5. The spindle motor mechanism 1 and the head positioning mechanism 3 are fixed to the base 4 and the cover 5 through screw holes 4a, 5a and held. A tape 7 for seal is externally attached to the holes 4a, 5a provided at the base 4 and the cover 5, while this tape 7 for seal is formed from a metal film and an adhesive applied to the metal film.

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, and more particularly to a magnetic disk device in which a spindle motor and a head positioning mechanism are screwed to a base and a cover.

[0002]

2. Description of the Related Art A conventional magnetic disk device includes a magnetic disk mounted on a spindle motor, a head positioning mechanism having a head facing the magnetic disk, and a base and a cover containing these. The base and the cover are sealed with an elastic body such as fluororubber.

Further, the spindle motor and the head positioning mechanism have been screwed to the base or the cover from the outside. At the same time, the sealing of the screw hole portion with the outside air was performed by attaching a label based on YUPO paper or polyester to the above-mentioned screw hole portion.

[0004]

However, in the conventional magnetic disk device, the label is likely to deteriorate due to the humidity change in the label environment, which causes the humidity in the magnetic disk device to change over time. There was an inconvenience.

For example, in low humidity, the contact
When the start / stop (CSS) method is adopted, the CSS durability of the magnetic disk becomes poor, and at high humidity, adsorption of the magnetic head or corrosion of internal parts of the hard disk assembly (HDA) progresses. However, the durability of the entire apparatus deteriorates, and at the same time, the quality of the hard disk, which is a magnetic disk, deteriorates over time.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic disk device which can improve the disadvantages of the conventional example and can maintain high quality for a long period of time without being affected by the humidity change of the place of use. And

[0007]

According to the present invention, there is provided a spindle motor mechanism for mounting a magnetic disk, a head positioning mechanism for mounting a head facing the magnetic disk, and a base and a cover for shielding them from the outside air. In a magnetic disk device in which a seal rubber is mounted between the base and the cover, a spindle motor and a head positioning mechanism are fixed and held to the base and the cover through through screw holes.

Sealing tape is externally attached to the through-screw hole portions provided in the base and the cover. The sealing tape is formed of a metal foil and an adhesive applied to the metal foil. This aims to achieve the above-mentioned object.

[0009]

[Operation] When the magnetic disk device according to the present invention is installed in an environment of low humidity or high humidity, since the seal rubber 6 is sealed with fluorine rubber, the suction and drainage speed is very slow. Therefore, it is not easily affected by changes in environmental humidity. In addition, since the sealing tapes 7 and 17 in the above-mentioned embodiment are used also in the through screw holes 4a and 5a, the speed of sucking and draining is very slow, and it is good without being affected by the environmental humidity change. The operation can be continued for a long time.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

First, in FIG. 1, reference numeral 1 indicates a spindle motor mechanism on which a plurality of magnetic disks 2 are mounted, and reference numeral 3 indicates a head positioning mechanism on which a head 3A facing the magnetic disks 2 is mounted. The spindle motor mechanism 1 and the head positioning mechanism 3 are mounted in the base 4 and the cover 5. A seal rubber 6 is mounted between the base 4 and the cover 5 so that the spindle motor mechanism 1 and the head positioning mechanism 3 are shielded from the outside air. Fluorine-based rubber is used as a material for the seal rubber 6. Further, in FIG. 1, reference numeral 8 indicates a driving means for urging the operation of the head positioning mechanism 3.

The spindle motor mechanism 1, the head positioning mechanism 3, and the driving means 8 are screwed to the above-mentioned base 4 and cover 5 through through screw holes 4a and 5a, respectively. A sealing tape 7 having a low moisture permeability is externally attached to the through screw holes 4a and 5a of the base 4 and the cover 5.

As shown in FIG. 2, the sealing tape 7 includes a metal foil 7A and an adhesive 7 applied to the metal foil 7A.
And B. Further, as the metal foil 7A, an aluminum foil is used in this embodiment. For this reason,
Due to the action of the sealing tape 7, inflow of water or water vapor is effectively blocked in the through screw holes 4a and 5a.

FIG. 3 shows another example of the above-mentioned sealing tape. The sealing tape 17 shown in FIG. 3 includes a metal foil 7A made of aluminum or the like and the metal foil 7A.
The adhesive 7B is applied to one surface of the metal foil 7A, and the polyethylene terephthalate film 17B is attached to the other surface of the metal foil 7A via the adhesive 17A. This makes it possible to obtain the sealing tape 17 which is reinforced with the polyethylene terephthalate film 17B.

When the magnetic disk device constructed as described above is installed in an environment of low humidity or high humidity, the sealing rubber 6 portion is sealed with fluorine rubber, so that the speed of suction and drainage is high. It is very slow and therefore insensitive to environmental humidity changes. Also, through screw hole 4
Since the sealing tapes 7 and 17 in the above-described embodiment are used also in the portions a and 5a, the speed of sucking and draining water is very slow, and the operation can be continued without being affected by the environmental humidity change. .

[0016]

As described above, according to the present invention,
Since the sealing tape mainly consisting of metal foil is attached to the through screw holes for mounting the spindle motor mechanism and the head positioning mechanism, even if the humidity changes in the environment, it is possible to reduce the change in humidity inside the device. Therefore, the humidity in the apparatus can be kept constant for a long period of time, and therefore, the adverse effect on the magnetic disk at the time of low humidity and the head adsorption and the member at the time of high humidity in the above-described conventional example can be reduced. As a result, it is possible to provide an unprecedented excellent magnetic disk device that can maintain good operation for a long period of time without being affected by changes in humidity at the place of use.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an example of the sealing tape disclosed in FIG.

FIG. 3 is a cross-sectional view showing another example of a sealing tape.

[Explanation of symbols]

 1 Spindle Motor 2 Magnetic Disk 3 Head Positioning Mechanism 4 Base 4a, 5a Through Screw Hole 5 Cover 6 Seal Rubber 7 Sealing Tape 7A Metal Foil 7B 17A Adhesive 17B Polyethylene Terephthale Tape

Claims (3)

[Claims] 1. A spindle motor mechanism equipped with a magnetic disk, a head positioning mechanism equipped with a head facing the magnetic disk, and a base and a cover for shielding them from the outside air, and between the base and the cover. In a magnetic disk device having a seal rubber attached to the spindle motor and head positioning mechanism, the spindle motor and the head positioning mechanism are fixed and held to the base and the cover via through screw holes, and through screw hole portions provided in the base and cover. To
A magnetic disk device, wherein a sealing tape is attached from the outside, and the sealing tape is formed by a metal foil and an adhesive applied to the metal foil. 2. A spindle motor mechanism equipped with a magnetic disk, a head positioning mechanism equipped with a head facing the magnetic disk, and a base and a cover for blocking these from the outside air, and between the base and the cover. In a magnetic disk device having a seal rubber attached to the spindle motor and head positioning mechanism, the spindle motor and the head positioning mechanism are fixed and held to the base and the cover via through screw holes, and through screw hole portions provided in the base and cover. To
The sealing tape is attached from the outside, and the sealing tape is attached to the metal foil, the adhesive applied to one side of the metal foil, and the other side of the metal foil via the adhesive. And a polyethylene terephthalate film. 3. The magnetic disk drive according to claim 1, wherein the metal foil is made of aluminum tape.