JPH1055662A - Magnetic disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve hermetical sealing property for humidity and electromagnetic and magnetic shielding property by encapsulating or laminating an aluminum material to a sealing member. SOLUTION: A magnetic disk mechanism consisting of a magnetic disk 11, magnetic head 13, etc., is housed in a base member 3 provided with a predetermined opening part 9. The opening part 9 of the base member 3 is sealed by a cover member 5, and a gap between the base member 3 and the cover member are hermetically sealed by the seal member 7. The seal member 7 is constituted so that the aluminum material is encapsulated or laminated to the sheet state. Thus, when the seal member is encapsulated by the aluminum material, the magnetic disk device is magnetically shielded even when irradiated by electromagnetic wave from the outside of the device, then the influence of external magnetism to the inside of the magnetic disk device is suppressed, and reliability of the operation of the device is increased. In the case the aluminum material is laminated to the sheet state, the intrusion of moisture into the magnetic disk device is perfectly prevented in addition to the effect in the case of the encapsulating manner since the moisture does not transmit through the sheet- stated aluminum material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, and more particularly to a magnetic disk drive having a plurality of magnetic disks, a magnetic head, a head arm for supporting the magnetic head, and the like.

[0002]

2. Description of the Related Art Conventionally, there have been the following magnetic disk devices. That is, the magnetic disk drive
It has a plurality of rotating magnetic disks, a plurality of magnetic heads for reading and writing data in proximity to the magnetic disks, a suspension on which the magnetic head is mounted, and a head arm for holding the suspension. ing. Further, a base member and a cover member for accommodating and fixing the magnetic disk mechanism composed of these components are provided.

[0003] The base member is formed in a box shape as a predetermined container, and has an opening partly. This opening is for inserting and arranging the magnetic disk mechanism, and has a sufficient opening area. The cover member is for sealing the entire opening formed in the base member, and is formed in a plate shape. Further, a seal member for sealing the inside of the magnetic disk drive is provided in a gap between the base member and the cover member.

As a sealing member for sealing, a so-called gasket or the like is generally used. However, in recent years, a so-called gasket-less structure in which a sealing structure is realized only with a seal made of PET (polyethylene terephthalate) is used. Things are also appearing. Specifically, a cover member is provided as a drop lid on a box-shaped base member, and a seal member is adhered thereon so as to cover a gap between the base member and the cover member. Thus, the gap at the joint between the base member and the cover member can be sealed, and dust can be prevented from entering the inside of the magnetic disk device.

[0005] However, there are various examples of magnetic disk devices, such as a magnetic disk drive in which a base member for fixing a magnetic disk mechanism is formed in a plate shape and a cover member is formed in a box shape, or a magnetic disk drive in the direction of the rotation axis of the magnetic disk. There is a type or the like in which a base member and a cover member are vertically separated near a substantially central portion.

[0006]

However, the above conventional example has the following disadvantages. That is, since PET or the like used as a sealing member has a very high moisture permeability, it has a disadvantage that it is difficult to maintain the humidity sealing property while maintaining the air sealing property. Also,
Since PET and the like do not have electromagnetic and magnetic properties, they cannot expect an electromagnetic and magnetic shielding effect.
There has been a problem that external noise affects the magnetic disk mechanism.

Further, when the seal member is made of a high-strength material, the shape of the seal member itself does not easily follow the joint surface of the base member and the cover member, so that there is an inconvenience that the sealing performance cannot be ensured. I was This is particularly noticeable when the shapes of the base member and the cover member are complicated. On the other hand, when a low-strength material is used, the seal member itself tends to be wrinkled, and there has been a problem that the seal member cannot be stably stuck to the joint surface between the base member and the cover member.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic disk drive which solves the above-mentioned disadvantages, and in particular, has excellent humidity sealing properties and electromagnetic and magnetic shielding properties.

[0009]

In order to achieve the above object, according to the present invention, a base member having a predetermined opening for accommodating a magnetic disk mechanism and a base member corresponding to the base member are provided. A cover member for sealing the opening,
A magnetic disk drive comprising: a seal member for sealing a gap between the base member and the cover member;
The seal member contains an aluminum material.

With the above configuration, even when an electromagnetic wave is irradiated from outside the magnetic disk drive,
It is magnetically shielded by the aluminum material included in the seal member. For this reason, the influence of external magnetism is suppressed inside the magnetic disk device, and the reliability of the operation of the magnetic disk device is improved.

Further, the second aspect of the invention adopts a configuration in which a sheet-like aluminum material is laminated on the sealing member, and the other configurations are the same as the first aspect of the invention.
With the above-described structure, in addition to the same operation as the first aspect of the present invention, since the sheet-like aluminum material does not transmit moisture, the invasion of moisture into the magnetic disk device is completely prevented. .

Further, in the invention according to the third aspect, a means is adopted in which the sealing member is formed by laminating a PET, an adhesive layer, an aluminum material, and an adhesive layer in this order.
Or, it is the same as the invention described in 2. With the above configuration, the sealing member is formed in a manner in which the PET, the adhesive layer, and the aluminum material are completely adhered to each other to form a sealing member, in addition to the same operation as the first or second aspect of the present invention. Can be realized.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view and a sectional view showing a magnetic disk drive 1 according to the present invention. Reference numeral 3 denotes a base member, reference numeral 5 denotes a cover member, and reference numeral 7 denotes a seal member. FIG. 1B is a cross-sectional view of FIG.
It shows a cross-sectional view in which a part of the line is omitted.

The magnetic disk drive 1 has a base member 3 having a predetermined opening 9 for accommodating a magnetic disk mechanism, a cover member 5 for sealing the opening 9 of the base member 3,
A seal member 7 for sealing a gap between the base member 3 and the cover member 5 is provided. The seal member 7 contains an aluminum material.

The magnetic disk mechanism, which is a main component of the magnetic disk drive 1, reads and writes data on a plurality of rotating magnetic disks 11 and close to the magnetic disks 11. It has a plurality of magnetic heads 13, a suspension to which the magnetic heads 13 are attached, and a head arm for holding the suspension.

A plurality of magnetic disks 11 are supported by a single rotating shaft, and the whole is rotated by a spindle motor engaged with the rotating shaft. The number of magnetic disks 11 depends on the required storage capacity. The magnetic disk 11 is configured to be able to store both sides.

Magnetic heads 13 for reading and writing information from and to the magnetic disks 11 are provided on both sides of each magnetic disk 11. This is because information is recorded on both sides of the magnetic disk 11 as described above. The magnetic head 13 is configured as a so-called air-floating type head. The magnetic head 13 contacts the surface of the magnetic disk 11 when the magnetic disk 11 is stopped, and slightly moves from the magnetic disk 11 while the magnetic disk 11 is rotating. It is configured to levitate. Therefore, since the gap between the magnetic disk 11 and the magnetic head 13 is small, it is necessary to particularly prevent intrusion of fine dust and dust.

The magnetic disk mechanism is housed in a box-shaped deep base member 3. As shown in FIG.
The bottom and side surfaces of the base member 3 are surrounded by a predetermined base wall, and only the upper surface is opened as an opening 9. In the present embodiment, the entire upper surface of the base member 3 is an open portion, but in some cases, there may be a partial open portion.

The cover member 5 corresponding to the opening 9 of the base member 3 has a role of sealing the opening 9 of the base member 3 after the magnetic disk mechanism is stored in the base member 3. It is formed in a shape and its size is set so as to fit on the inner wall of the base member 3. When the cover member 5 is disposed in the opening 9 of the base member 3, the upper end surface of the base member 3 and the upper surface of the cover member 5 become substantially coplanar. However, there is a slight gap between the base member 3 and the cover member 5. The cover member is shown in FIG.
1B, the cover member 5 is actually formed with a predetermined unevenness on the surface of the cover member 5 as shown in FIG.

Here, there are various examples of the magnetic disk drive. For example, contrary to the above, the base member for fixing the magnetic disk mechanism is formed in a plate shape and the cover member is formed in a box shape. And a type in which a base member and a cover member are vertically separated near a substantially central portion of a magnetic disk in a rotation axis direction. In the type of dividing at the center, both the base member and the cover member are formed in a box shape.

The sealing member 7 contains an aluminum material inside. As an example, as shown in FIG.
The sheet-like PET 14, the adhesive layer 17a, the sheet-like aluminum material 19, the adhesive layer 17b, and the like are sequentially laminated. As these materials, those widely used as general materials are used. However, such a configuration is merely an example, and there is a wide variety of combinations with other resins or the thickness of each layer. For this reason,
In making a selection, it is necessary to make a decision after confirming the specifications and the like of the magnetic disk device.

Next, a method of assembling the magnetic disk drive 1 according to this embodiment will be described. First, the base member 3
The magnetic disk mechanism is housed inside through the opening 9 of FIG. Then, the cover member 5 is provided in the opening 9 to seal the magnetic disk device 1. At this time, the cover member 5 is fitted to the base member 3 in a state like a dropping lid, and the upper end of the base member 3 and the upper surface of the cover member 5 are substantially flush with each other.

After the base member 3 and the cover member 5 are integrated, the seal member 7 is attached to a position corresponding to the joint surface between the two. At this time, since the adhesive layer 17b is formed on one surface of the seal member 7 as described above, the magnetic disk device 1 can be easily sealed by simply pressing it against the magnetic disk device 1. Further, since the seal member 7 is laminated with an aluminum material (aluminum material layer), it is possible to reliably prevent moisture from entering the magnetic disk device 1. Further, since the aluminum material 19 has electromagnetic and magnetic shielding properties, external electromagnetic and magnetic noise can be cut off, and the operation reliability of the magnetic disk device 1 can be improved.

[0024]

As described above, in the present invention, since the aluminum material is laminated on the seal member, it is possible to reliably prevent moisture from entering. In addition, since aluminum material has electromagnetic and magnetic shielding properties,
There is an excellent effect that the magnetic noise can be cut off and the operation reliability of the magnetic disk drive can be improved.

Further, since an aluminum material whose shape is relatively easily changed is used for the seal member, the seal member is easily deformed into the shape of the surface to which the seal member is adhered. For this reason, there is an excellent effect that the air-tightness can be improved as compared with the conventional sealing member.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, and FIG.
FIG. 1A is a plan view of a magnetic disk drive, and FIG.
1 is a sectional view of the magnetic disk drive taken along line XX in FIG.

FIG. 2 is a sectional view of a part of a seal member used in the magnetic disk drive disclosed in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic disk drive 3 Base member 5 Cover member 7 Seal member 9 Opening

Claims (3)

[Claims] A base member having a predetermined opening for accommodating the magnetic disk mechanism, a cover member for sealing the opening corresponding to the base member, and a base member and the cover member. A magnetic disk drive comprising a seal member for sealing a gap, wherein the seal member includes an aluminum material. 2. The magnetic disk drive according to claim 1, wherein a sheet-like aluminum material is laminated on the seal member. 3. The magnetic disk drive according to claim 1, wherein the sealing member is formed by laminating a sheet-like PET, an adhesive layer, an aluminum material, and an adhesive layer in this order.