JPH05234352A - Disk device - Google Patents

Abstract

PURPOSE:To provide a magnetic disk device made free of pollution by fixing fine foreign matters which are mixed to be sealed into the magnetic disk device. CONSTITUTION:A thin film 20 made of a sticky material is provided in an internal surface of a cover 8 of a magnetic disk device or in a passage of air generated with the rotation of a magnetic device 1. Floating fine foreign matters mixed to be sealed into the magnetic disk device are made to adhere to the sticky material 20 as mentioned above to fix. This enables the making of the fine foreign matters free of pollution thereby preventing the adherence of the foreign matters to the magnetic disk. This also prevents collision between the foreign matters and the magnetic head thereby upgrading the reliability of the magnetic disk device significantly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a built-in magnetic or optical disk and a magnetic or optical head for fixing minute foreign substances mixed in a magnetic or optical disk device covered with a cover. The present invention relates to a disk device that is rendered harmless. Here, the minute foreign matter means foreign matter particles having a size of floating in the air.

[0002]

2. Description of the Related Art Conventionally, for example, a magnetic disk device is described in Japanese Patent Publication No. 3-61272. FIG.
(A) And (b) is the plane sectional view and side sectional view which respectively show the outline of the conventional magnetic disk unit. A plurality of magnetic disks 1 are mounted on a rotary shaft 10 supported by bearings 2 and are rotationally driven by a drive motor 11. On the other hand, a plurality of magnetic heads 3 for writing and reading information on the magnetic disk 1 are integrated with a slider portion 4 and supported by an arm 5. This arm 5
Is attached to the movable portion 6 on the positioning device 7, and accurately positions the magnetic head 3 at a predetermined position on the magnetic disk 1. Generally, the magnetic disk device including the magnetic disk 1, the rotating shaft 10, the drive motor 11, the magnetic head 3, and the positioning device 7 has a closed structure covered with a cover 8 to prevent foreign matter from entering from the outside. It is preventing. Although the magnetic disk device is assembled in a dust-free room, as shown in FIG.
It is unavoidable that a, 9b, 9c, 9d, etc. are mixed.
Therefore, in order to prevent the foreign matter from adhering to the magnetic disk even if foreign matter is mixed, as shown in FIG. 13A, the air filter 1 is formed in the flow path of air generated as the magnetic disk rotates.
2 is provided so that foreign matter can be captured. 9b in the figure
Indicates a trapped foreign matter. In addition, in FIG. 13, in order to facilitate the reading, the minute foreign matter is enlarged and drawn.

[0003]

As shown in FIG. 13 (a), there is a problem that not all the foreign substances mixed in the magnetic disk device are captured by the air filter 12 in the above-mentioned conventional technique. It was For example, some foreign substances such as the foreign substance 9c do not pass through the air filter 12, and some extremely fine foreign substances such as the foreign substance 9d may pass through the air filter 12. Further, when the magnetic disk 1 is stopped and the air flow inside the apparatus is stopped, the foreign matter captured by the air filter 12 may be released again. In reality, despite the presence of the air filter 12, as shown in FIG. 14, a so-called crash accident occurs in which the foreign matter 9c mixed in the magnetic disk device collides with the magnetic disk 1 and the slider portion 4. Further, there is no known means for detecting and removing minute foreign matter mixed in the magnetic disk device.

In order to solve the above problems of the prior art, an object of the present invention is to provide a magnetic or optical disk device in which a minute foreign substance, such as a magnetic or optical disk, is fixed to render it harmless. Especially.

[0005]

In order to achieve the above object, the present invention drives a magnetic or optical disk, a rotary shaft on which the magnetic or optical disk is mounted, and a rotary shaft. A drive motor, a magnetic or optical head for writing and reading information to and from the magnetic or optical disk, a head positioning device for positioning the magnetic or optical head, and at least the disk and the rotating shaft. In a magnetic or optical disc device having a head and a cover for covering the head positioning device, a thin film of an adhesive substance is provided on a desired portion of the inner surface of the cover and the magnetic or optical disc device is entered. A disk device characterized in that minute foreign matter is adhered and fixed to a thin film of the adhesive substance.

Further, according to the present invention, the inside of the cover for the magnetic or optical disk device is not provided with the thin film of the above-mentioned adhesive substance on the inner surface of the cover of the magnetic or optical disk device. The fine foreign matter that has entered is adhered to the thin film of the adhesive substance and fixed, and the fine foreign matter that has been trapped is prevented from falling again due to gravity, so that the fine foreign matter is rendered harmless.

Further, according to the present invention, the adhesive force of the thin film of the adhesive substance provided on each surface of the cover of the disk device is changed according to the wind pressure applied to each surface of the cover of the disk device. The fine foreign matter is made harmless by adhering and fixing the mixed fine foreign matter to the thin film of the adhesive substance and preventing the fine foreign substance once captured by the adhesive thin film from being separated by strong wind pressure. ..

Further, according to the present invention, a disk, a rotary shaft on which the disk is mounted, a drive motor for driving the rotary shaft, a magnetic head for writing and reading information to and from the disk, and the head A magnetic head positioning device for positioning a magnetic head, and a magnetic or optical disk device including at least the disk, the rotation shaft, and a cover that covers the head and the head positioning device. The disk device is characterized in that a thin film of an adhesive substance is provided in the path, and minute foreign substances that have entered the disk device are adhered and fixed to the thin film of the adhesive substance.

[0009]

In recent years, as the recording density of disk devices such as magnetism has improved, the disk devices such as magnetism are required to have higher reliability, and reducing the influence of foreign matter has become an important technical issue. In a disk device such as a magnetic device, a thin film of an adhesive substance is provided at a desired position on the inner surface of a cover, and it becomes possible to fix minute foreign substances entering the disk device such as a magnetic device by adhering to the thin film of the adhesive substance. It becomes possible to render the minute foreign matter harmless and prevent a crash accident or the like to realize a highly reliable disk device such as a magnetic disk device.

In addition, the inside of the cover of the disk device such as the magnetic field is not provided with the thin film of the adhesive substance on the upper surface, so that the captured minute foreign matter is prevented from falling again due to gravity. It becomes possible.

Further, the adhesive force of the thin film of the adhesive substance provided on each surface is changed according to the wind pressure applied to each surface of the inner surface of the cover of the disk device such as the magnetism. It becomes possible to prevent the minute foreign matter once trapped from coming off due to strong wind pressure.

Further, in a magnetic disk device, a thin film of an adhesive substance is provided in advance in a flow path of air generated by the rotation of the magnetic disk so that the magnetic material is mixed in the magnetic disk device. When the entrapped minute foreign matter floats, it becomes possible to fix the minute foreign matter by adhering it to the thin film of the above-mentioned adhesive substance, making the minute foreign matter harmless and preventing the occurrence of crash accidents, etc. As a result, it is possible to realize a highly reliable magnetic disk device.

[0013]

EXAMPLE An example of the present invention will be described with reference to FIGS. First, a first embodiment of the present invention will be described with reference to FIGS.
It will be explained based on. 1A and 1B are a plan sectional view and a side sectional view of a magnetic disk device according to the first embodiment. This magnetic disk device is a horizontal magnetic disk device in which a magnetic disk is placed horizontally. A plurality of magnetic disks 1 are mounted on a rotary shaft 10 supported by bearings 2 and are rotationally driven by a drive motor 11. On the other hand, a plurality of magnetic heads 3 for writing and reading information on the magnetic disk 1 are integrated with a slider portion 4 and supported by an arm 5. The arm 5 is attached to the movable portion 6 on the positioning device 7, and accurately positions the magnetic head 3 at a predetermined position on the magnetic disk 1. The magnetic disk device including the magnetic disk 1, the rotating shaft 10, the drive motor 11, the magnetic head 3, and the positioning device 7 has a hermetically sealed structure covered with a cover 8 to prevent foreign matter from entering from the outside. There is. Further, as in the conventional case, the air filter 12 is provided in the flow path of the air generated by the rotation of the magnetic disk so as to capture the relatively large foreign matter. In addition, in the following explanatory drawings including this drawing, in order to facilitate the reading, the minute foreign matter is enlarged and drawn. The major feature of the present invention is that the inner surface, A surface, B surface, C surface, Da surface, Db surface, D of the cover 8 are
The thin film 20 of the adhesive substance is formed on the c-plane and the E-plane. This adhesive substance may be a double-sided adhesive tape or a spray type adhesive. In this embodiment, the adhesive thin film 20 is formed using a spray type adhesive.
Floating minute foreign matter mixed in the magnetic disk device and enclosed therein, for example, 9a, 9b, 9c, 9d, and the like generally move along the air flow generated with the rotation of the magnetic disk 1, but of course, The inner surface of the cover 8 of the apparatus, that is, the A surface, the B surface, the C surface, the Da surface, the Db surface, the Dc surface, and the E surface are contacted with a probability. The minute foreign matter that has come into contact with the adhesive thin film 20 once
When it is touched, it is captured by its adhesive force and fixed at that position to be in the state shown in FIGS. 2 (a) and 2 (b). That is, for example, the minute foreign matter 9a is on the A surface, 9b is on the Da surface,
c is captured on the B surface and 9d is captured and fixed on the Db surface. The present embodiment is characterized in that the adhesive thin film 20 is not formed on the F surface corresponding to the upper surface of the inner surface of the cover 8. That is, there is a fear that minute foreign matter captured by the adhesive thin film 20 may drop again due to gravity on the upper surface F, and the adhesive thin film 20 is not formed on the upper surface F to prevent this.

As described above, according to the present embodiment, the floating fine foreign matter mixed and sealed in the magnetic disk device is captured and fixed by the adhesive thin film 20 formed on the inner surface of the cover 8 of the device. This makes it possible to render the minute foreign matter harmless, prevent the foreign matter from adhering to the magnetic disk, and prevent the foreign matter from colliding with the magnetic head, thus improving the reliability of the magnetic disk device. Greatly improved. Further, even if the magnetic disk stops, unlike the conventional air filter, the once trapped minute foreign matter is not released.

A second embodiment of the present invention will be described with reference to FIGS. 3 and 4. 3A and 3B are a plan sectional view and a side sectional view of a magnetic disk device according to the second embodiment. In the first embodiment, the horizontal type magnetic disk device in which the magnetic disk is placed horizontally is targeted, but in the present embodiment, the vertical type magnetic disk device in which the magnetic disk is placed vertically is targeted. The basic configuration of the device is exactly the same as that of the first embodiment, and therefore its explanation is omitted. In the present embodiment, since the inner C surface of the inner surface of the device cover 8 corresponds to the upper surface, A surface, B surface, Da surface, D
It differs from the first embodiment in that the adhesive thin film 30 is formed on the b-side, Dc-side, E-side, and F-side.

The small foreign matter contacting the inner surface is captured by the adhesive force once it comes into contact with the adhesive thin film 30, and is fixed at that position to be in the state shown in FIGS. 4 (a) and 4 (b). That is, for example, the minute foreign matter 9a is on the A surface, and 9b is Da.
The surface 9c is captured and fixed on the surface B, and the surface 9d is captured on the surface E.

According to this embodiment, as in the first embodiment,
By trapping and fixing the floating fine foreign matter mixed and sealed in the magnetic disk device with the adhesive thin film 30 formed on the inner surface of the cover 8 of the device, the fine foreign matter can be rendered harmless. Can be prevented from adhering to the magnetic disk, and the foreign matter and the magnetic head can be prevented from colliding with each other, so that the reliability of the magnetic disk device is significantly improved.

A third embodiment of the present invention will be described with reference to FIG. 5A and 5B are a plan sectional view and a side sectional view of a magnetic disk device according to the third embodiment. This magnetic disk device is a horizontal magnetic disk device in which a magnetic disk is placed horizontally. The basic configuration of the device is exactly the same as that of the first embodiment, and therefore its explanation is omitted. In the first and second embodiments, the adhesive force of the adhesive thin film formed on the inner surface of the device cover 8 is constant regardless of the place, but in the present embodiment, the adhesive force is changed depending on the place where the adhesive thin film is formed. The difference is that the power is changed. Figure 5
In (a) and (b), the air flow generated with the rotation of the magnetic disk 1 is the inner surface orthogonal to the magnetic disk surface, that is, A surface, B surface, C surface, Da surface, Db surface, and Dc.
A strong wind pressure is applied to the surfaces, and the wind pressure becomes weaker on the parallel inner surface, E surface, and F surface. Therefore, side A, side B, side C
On the surface, the Da surface, the Db surface, and the Dc surface, it is necessary to strengthen the adhesive force of the adhesive thin film so that the minute foreign matter once captured by the adhesive thin film is not separated by the strong wind pressure.
In FIGS. 5 (a) and 5 (b), the adhesive thin films 40a formed on the six inner surfaces are thin films having high adhesive strength, and E
The adhesive thin film 40b formed on the surface is a thin film having a relatively low adhesive force as compared with 40a, and is represented by changing the thickness of each thin film. Also, as in the first embodiment, there is a fear that minute foreign matter captured by the adhesive thin film may drop again due to gravity on the upper surface F surface, and in order to prevent this, the adhesive thin film 40b is formed on the upper surface F surface. Absent. Adhesive thin film 40a
Since the situation of fixing the foreign matter by 40 and 40b is the same as that of the first embodiment, the description thereof will be omitted.

According to this embodiment, as in the first embodiment,
Adhesive thin film 40a formed on the inner surface of the cover 8 of the device for floating fine foreign substances mixed and enclosed in the magnetic disk device.
And 40b, the fine foreign matter can be rendered harmless, the foreign matter can be prevented from adhering to the magnetic disk, and the foreign matter can be prevented from colliding with the magnetic head. The reliability of the magnetic disk device is greatly improved.

A fourth embodiment of the present invention will be described with reference to FIG. 6A and 6B are a plan sectional view and a side sectional view of a magnetic disk device according to the fourth embodiment. In the third embodiment, the horizontal type magnetic disk device in which the magnetic disk is placed horizontally is targeted, but in the present embodiment, the vertical type magnetic disk device in which the magnetic disk is placed vertically is targeted. The basic configuration of the device is the third
Since it is exactly the same as the embodiment described above, the description thereof will be omitted. In this embodiment, as in the third embodiment, the adhesive force is changed according to the place where the adhesive thin film is formed. In FIGS. 6A and 6B, the flow of air generated by the rotation of the magnetic disk 1 is the inner surface orthogonal to the magnetic disk surface, that is, A.
A strong wind pressure is applied to the surfaces, B surface, C surface, Da surface, Db surface, and Dc surface, and the wind pressure is weakened to the parallel inner surface, E surface, and F surface. Therefore, A side, B side, Da side, Db
On the surface and the Dc surface, it is necessary to strengthen the adhesive force of the adhesive thin film so that the minute foreign matter once captured by the adhesive thin film is not separated by the strong wind pressure. In FIGS. 6 (a) and 6 (b), the adhesive thin films 50a formed on the above five inner surfaces are thin films having high adhesive strength, and the adhesive thin films 50b formed on the E and F surfaces are relative to 50a. A thin film with low adhesive strength is expressed by changing the thickness of each thin film. Also, as in the second embodiment, there is a fear that minute foreign matter captured by the adhesive thin film may drop again due to gravity on the upper surface C surface, and in order to prevent this, the adhesive thin film 50a is formed on the upper surface C surface. Absent. Adhesive thin films 50a and 5
Since the situation of foreign matter fixation by 0b is the same as that of the second embodiment, description thereof will be omitted.

According to this embodiment, as in the first embodiment,
Adhesive thin film 50a formed on the inner surface of the cover 8 of the device for floating fine foreign substances mixed and enclosed in the magnetic disk device.
By capturing and fixing with 50b and 50b, it becomes possible to make the minute foreign matter harmless, it is possible to prevent the foreign matter from adhering to the magnetic disk, and it is possible to prevent the foreign matter from colliding with the magnetic head. The reliability of the magnetic disk device is greatly improved.

A fifth embodiment of the present invention will be described with reference to FIG. 7A and 7B are a plan sectional view and a side sectional view of a magnetic disk device according to the fifth embodiment. In the above-described four embodiments, there is a fear that minute foreign matter captured by the adhesive thin film may drop again on the upper surface of the device cover 8 due to gravity, and the adhesive thin film is not formed on the upper surface to prevent this. The present embodiment is intended for a magnetic disk device mounted on a satellite or the like and operated in a weightless state, and is greatly different in that an adhesive thin film is formed on the upper surface of the device cover 8. That is, the device cover 8
Inner surface, A surface, B surface, C surface, Da surface, Db surface, Dc surface,
The adhesive thin film 60 is formed on all of the E surface and the F surface. 7A and 7B show a horizontal type magnetic disk device, the same applies to a vertical type magnetic disk device. Since the basic structure of the apparatus is exactly the same as that of the third embodiment, its explanation is omitted. Since the situation of foreign matter fixation by the adhesive thin film 60 is the same as in the first embodiment,
The description is omitted.

According to this embodiment, as in the first embodiment,
By trapping and fixing the floating fine foreign matter mixed and sealed in the magnetic disk device with the adhesive thin film 60 formed on the inner surface of the cover 8 of the device, the fine foreign matter can be rendered harmless. Can be prevented from adhering to the magnetic disk, and the foreign matter and the magnetic head can be prevented from colliding with each other, so that the reliability of the magnetic disk device is significantly improved. Although the present embodiment is intended for a magnetic disk device that operates in a weightless state, the adhesive force of the adhesive thin film 60 is
This embodiment is applicable even under normal gravity, as long as it is stronger than the wind pressure due to gravity and the rotation of the magnetic disk 1 and there is no fear that the minute foreign matter captured by the adhesive thin film 60 will fall again due to gravity. It is possible.

A sixth embodiment of the present invention will be described with reference to FIGS. 8 and 9. 8A and 8B are a plan sectional view and a side sectional view of a magnetic disk device according to the sixth embodiment. The basic configuration of the device is exactly the same as that of the first embodiment, and therefore its explanation is omitted. In this embodiment, instead of forming an adhesive thin film on the inner surface of the device cover 8 as in the above-mentioned five embodiments, a thin nozzle-like foreign substance capturing unit is provided in the air flow path generated by the rotation of the magnetic disk. The difference is that 15a, 15b, and 15c are provided. The foreign matter capturing units 15a, 15b, and 15c
Adhesive thin films 70a, 70b, and 70c are formed on the inner wall of the structure, and the structure is such that suspended fine foreign matter passing therethrough is captured. Floating minute foreign substances mixed in and enclosed in the magnetic disk device, such as 9e, move substantially along the flow of air generated as the magnetic disk 1 rotates,
Once the adhesive thin films 70a, 70b, and 70c on the inner walls of the foreign matter capturing units 15a, 15b, and 15c are touched, they are captured by the adhesive force and fixed in that position, and are in the state shown in FIGS. 9 (a) and 9 (b). Becomes That is, for example, the minute foreign matter 9e is the adhesive thin film 70 of the foreign matter capturing unit 15b.
It is captured and fixed on b.

According to this embodiment, as in the first embodiment,
The minute foreign matter is trapped and fixed by the adhesive thin films 70a, 70b, and 70c formed on the inner walls of the foreign matter capturing units 15a, 15b, and 15c. Can be rendered harmless, foreign matter can be prevented from adhering to the magnetic disk, and collision between the foreign matter and the magnetic head can be prevented, and the reliability of the magnetic disk device is greatly improved. Further, it has an economical advantage that the coating amount of the adhesive thin film is smaller than that of the above-mentioned embodiment. Further, by combining this embodiment with the first to fifth embodiments,
It is sufficiently possible to obtain a greater effect in reducing the influence of foreign matter.

A seventh embodiment of the present invention will be described with reference to FIGS. FIGS. 10A and 10B are a plan sectional view and a side sectional view of a magnetic disk device according to the seventh embodiment. The basic configuration of the device is exactly the same as that of the first embodiment, and therefore its explanation is omitted. In this embodiment, instead of forming an adhesive thin film on the inner surface of the device cover 8 as in the first to fifth embodiments, air generated by the rotation of the magnetic disk is generated as in the sixth embodiment. Filter-like foreign matter capturing units 16a, 16b, and 16 in the flow path
The difference is that c is provided. This foreign matter capture unit 1
The structures of 6a, 16b, and 16c are shown in FIG. In this foreign matter trapping unit, the lattice-shaped adhesive thin films 80a, 80 are provided on the surfaces of the nozzle-shaped ventilation holes 17a, 17b, and 17c arranged in a lattice (on the side where the air flows).
b and 80c are formed, and the structure is such that suspended fine foreign matter passing therethrough is captured. Floating minute foreign matter mixed in and enclosed in the magnetic disk device, for example, 9f
Etc. move substantially along the flow of air generated by the rotation of the magnetic disk 1, and once the foreign matter capturing units 16a, 16
b and 16c adhesive thin films 80a, 80b, and 80
When c is touched, it is captured by its adhesive force and fixed at that position to be in the state shown in FIGS. 12 (a) and 12 (b).
That is, for example, the minute foreign matter 9f is captured and fixed on the adhesive thin film 80b of the foreign matter capturing unit 16b.

According to this embodiment, as in the first embodiment,
Floating fine foreign matter mixed and enclosed in the magnetic disk device is captured and fixed by the adhesive thin films 80a, 80b, and 80c formed on the foreign matter capturing units 16a, 16b, and 16c, so that the fine foreign matter is harmless. Therefore, it is possible to prevent foreign matter from adhering to the magnetic disk, and also to prevent collision between the foreign matter and the magnetic head, thereby greatly improving the reliability of the magnetic disk device. Further, similar to the sixth embodiment, it has an economic advantage that the adhesive thin film is applied in a smaller amount as compared with the first to fifth embodiments. Further, by combining this embodiment with the first to fifth embodiments, it is possible to obtain a greater effect in reducing the influence of foreign matter. In addition, the ventilation ports 17a, 1 of the foreign matter capturing units 16a, 16b, and 16c.
It is also possible to provide an air filter on the back surface of 7b and 17c (the side on which the flow of air flows).

Furthermore, the present invention described above is not limited to a magnetic disk device, and can be sufficiently applied to an optical disk device.

Although the above embodiment has been described as applied to a magnetic disk device, it is obvious that it can also be applied to an optical disk device and the like.

[0030]

According to the present invention, the floating fine foreign matter mixed and enclosed in the magnetic disk device or the like is used as an adhesive thin film formed on the inner surface of the device cover, or air generated by the rotation of the magnetic disk. By capturing and fixing with an adhesive thin film provided in the flow channel, it becomes possible to make it harmless,
It is possible to prevent foreign matter from adhering to magnetic disks,
Further, it is possible to prevent a foreign matter from colliding with a magnetic head or the like, and there is an effect that reliability of the magnetic disk device or the like is significantly improved.

[Brief description of drawings]

FIG. 1 is a plan sectional view and a side sectional view of a magnetic disk device according to a first embodiment of the present invention.

2A and 2B are a plan sectional view and a side sectional view showing how a minute foreign matter is captured in the first embodiment.

FIG. 3 is a plan sectional view and a side sectional view of a magnetic disk device according to a second embodiment of the present invention.

4A and 4B are a plan sectional view and a side sectional view showing how a minute foreign matter is captured in the second embodiment.

FIG. 5 is a plan sectional view and a side sectional view of a magnetic disk device according to a third embodiment of the present invention.

FIG. 6 is a plan sectional view and a side sectional view of a magnetic disk device according to a fourth embodiment of the present invention.

FIG. 7 is a plan sectional view and a side sectional view of a magnetic disk device according to a fifth embodiment of the present invention.

FIG. 8 is a plan sectional view and a side sectional view of a magnetic disk device according to a sixth embodiment of the present invention.

9A and 9B are a plan sectional view and a side sectional view showing how a minute foreign substance is captured in the sixth embodiment.

FIG. 10 is a plan sectional view and a side sectional view of a magnetic disk device according to a seventh embodiment of the present invention.

FIG. 11 is a diagram showing the structure of a foreign matter capturing unit in a seventh embodiment.

12A and 12B are a plan sectional view and a side sectional view showing how a minute foreign substance is trapped in the seventh embodiment.

FIG. 13 is a plan sectional view and a side sectional view showing an outline of a conventional magnetic disk device.

FIG. 14 is a diagram showing a crash accident in which foreign matter mixed in the magnetic disk device collides with the slider portion.

[Explanation of symbols]

1 ... magnetic disk, 3 ... magnetic head, 4 ... slider section,
7 ... Positioning device, 8 ... Device cover, 9a, 9b, 9
c, 9d, 9e, 9f ... Fine foreign matter, 10 ... Rotation axis, 11
... drive motor, 12 ... air filter, 15a, 15b,
15c, 16a, 16b, 16c ... Foreign matter capturing unit,
20, 30, 40a, 40b, 50a, 50b, 60,
70a, 70b, 70c, 80a, 80b, 80c ... Adhesive thin film.

Claims (8)

[Claims] 1. A disk, a rotary shaft on which the disk is mounted, a drive motor for driving the rotary shaft, a head for writing and reading information on the disk, and a head for positioning the head. In a disk device including a positioning device and at least the disk, a rotary shaft, a head and a cover that covers the head positioning device, a thin film of an adhesive substance is provided at a desired position on the inner surface of the cover,
A disk device characterized in that a minute foreign substance that has entered the disk device is adhered and fixed to the thin film of the adhesive substance. 2. The disk device according to claim 1, wherein the disk device is a magnetic disk device. 3. The disk device according to claim 1, wherein the inner surface of the cover is not provided with a thin film of the adhesive substance on its upper surface. 4. A disk device according to claim 1, wherein the adhesive force of the thin film of the adhesive substance is changed according to the position of the inner surface of the cover. 5. The disk device according to claim 1, wherein the drive motor is provided inside the cover. 6. A disk, a rotary shaft on which the disk is mounted, a drive motor for driving the rotary shaft, a head for writing / reading information to / from the disk, and a head for positioning the head. In a disk device provided with a positioning device and at least the disk, a rotary shaft, a head and a cover that covers the head positioning device, a thin film of an adhesive substance is provided in a flow path of air generated by the rotation of the disk, A disk device, characterized in that a minute foreign substance that has entered the disk device is adhered and fixed to the thin film of the adhesive substance. 7. The disk device according to claim 6, wherein the disk device is a magnetic disk device. 8. The disk drive according to claim 6, wherein the drive motor is provided inside the cover.