JPH0679436B2 - Magnetic disk device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] An improvement of a magnetic disk device, in which a difference in air pressure between a central portion and a peripheral portion of stacked disk media in the disk device is increased to increase the internal pressure of the device. A magnetic disk drive that increases the flow rate of fluid passing through a filter provided to remove the dust in order to keep the inside of the device clean.

[Industrial application field]

The present invention relates to a magnetic disk device, and more particularly, by increasing a pressure difference of air between a peripheral part and a central part of a disk medium in the device,
The present invention relates to a magnetic disk device that allows a clean fluid, which has passed through a filter installed in the device, to circulate in the device while increasing its flow rate.

In magnetic disk devices, there is an increasing demand for improvement in recording density, so that the flying distance of the magnetic head flying above the disk medium is becoming narrower.

Therefore, there is a demand for a magnetic disk device in which the inside of such a magnetic disk device is kept clean so that a head crash phenomenon caused by dust or the like generated from bearings of a carriage driven by an actuator in the device does not occur. ing.

[Conventional technology]

In a conventional large-sized magnetic disk device that uses a large-diameter disk medium, an air blower is installed outside, and clean air from which dust has been removed is introduced into the device using this air blower and the air is circulated. This keeps the inside of the device clean.

However, as the apparatus becomes smaller, a disk medium, a spindle for rotating the disk medium, an actuator for moving an arm for installing a magnetic head to a predetermined disk position, and the like are sealed in a housing covering the apparatus. Then, the air flow generated by the pressure difference between the peripheral portion of the disc and the central portion of the disc caused by the rotation of the disc is passed through the filter to form clean air, and this air is circulated inside the device. The method is adopted.

Such a conventional magnetic disk device will be described with reference to the schematic diagram of FIG.

FIG. 10 is a schematic view of a conventional magnetic disk device. As shown in the figure, a spindle 3 installed on the base 1 and rotated by a motor 2 has a ring-shaped hollow hub installed on the spindle 3. The mechanism 4 is installed, and the disk mediums 5 are stacked and installed at predetermined positions of the hub mechanism 4 at predetermined intervals. The hub mechanism 4 has openings 6 between the disk media 5 that are stacked and installed in a multilayer structure.
have.

A carriage 9 for moving the arm 8 having the magnetic head 7 to a predetermined track position on the disk 4 is installed on the base 1, and an actuator (magnetic circuit) for driving the carriage 9 to a predetermined position. ) 10 are provided. These disk medium 5, carriage 9, actuator 10, etc. are hermetically sealed in a sealing cover 11.

A ring-shaped disc 12 having the same shape as the disc 5A is provided above the uppermost disc 5A of the disc medium 5 so as to face the disc 5A.
A ring-shaped air filter 13 is installed between and. Then, as the disk 5 rotates at high speed, the disk 5
Since the pressure of the air in the peripheral portion of the device becomes higher than the pressure of the air in the central part of the desk 5, the pressure difference is used to circulate the air inside the device through the filter 13 as shown by the arrow, By means of 13, dust generated from the bearing 14 and the like below the carriage 9 in the apparatus is removed.

[Problems to be solved by the invention]

However, even in such an apparatus, a guide rail, a rotating roller, a rotating bearing, etc. are required to move the carriage, and it is structurally difficult to separate these bearings from the outside of the apparatus. The grease used for the above and dust and the like due to contact friction between the bearing and the guide rail enter the inside of the device, which causes a problem that the dust cannot be easily removed.

[Means for solving problems]

It is an object of the present invention to provide a magnetic disk device capable of removing the above dust more easily and sufficiently.

As shown in the drawing, the magnetic disk device of the present invention is installed between each of the stacked disk media 5 as shown in the plan view of FIG. 1 and the schematic side view of FIG. A flat spoiler 21 is installed behind the arm 8 on which the magnetic head 7 is installed as viewed from the direction of rotation of the disk medium 5 shown by arrow A. In addition, the disk media that are the lowermost than the uppermost disk media 5A of the stacked disk media 5
A shield plate 22 having a curved surface along the peripheral edge of all the disk media 5 between 5B is provided.

Further, a part of the base 1 is cut to provide an air passage 25, a partition plate 23 is provided on the air passage 25 except for the filter 24, and the spoiler 21 including the actuator 10 and the carriage 9 is provided.
A closed space is formed by the shield plate 22, the partition plate 23, and the like, and inside the closed space, a pair of upper and lower filters 24 are provided in the passage area of the air flow generated by the rotation of the disk medium 5.

[Action]

The magnetic disk device of the present invention includes a spoiler 21, a shield plate 22,
The cover 11, the part of the base 1 is further cut to form a passage 25 through which air passes, and the partition plate 23, the cover 11 and the inside of the device which are attached to the passage 25 in a state where the attachment portion of the filter 24 is removed. A closed space is formed in a form including the carriage 9 and the actuator 10 that easily generate dust, and most of the airflow generated by the rotation of the disk medium 5 is generated by the carriage 9 and the actuator 10 that easily generate dust. Try to lead to the part.

Then, a pair of filters 24 facing each other are installed above and below the closed space to effectively remove dust generated from the carriage 9 and the actuator 10.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in the figure, the magnetic disk device of the present invention has a plan view of FIG. 1 and a schematic side view of FIG.
As shown in FIG. 3 which is a sectional view of a main part of the drawing, FIG. 4 which is a perspective view of a main part of the entire apparatus, and FIG. 5 which is a cross-sectional view taken along line IV-IV ′ of FIG. A flat plate-shaped spoiler 21 is installed behind the arm 8 which is installed between the respective disk media 5 and in which the magnetic head 7 is installed when viewed from the rotation direction of the disk media 5 shown by the arrow A. Further, a shield plate 22 is provided on the base 1 so as to form a curved surface along the peripheral edge of all the disk media 5 between the uppermost disk media 5A and the lowermost disk media 5A of the stacked disk media 5. .

Further, a part of the base 1 is cut to form an air passage 25,
A partition plate 23 is provided on the passage 25 except for the location where the filter 24 is attached.

In this way, the spoiler 21, the shield plate 22, the partition plate 23, and the cover including the actuator 10 and the carriage 9 are included.
A closed space is formed by 11, and inside the closed space, a pair of upper and lower filters 24 are provided in a passage area of an air flow generated by the rotation of the disk medium 5.

The filter 24 is made of glass fiber, and is folded into a rectangular parallelepiped shape. The four corners of the rectangular parallelepiped filter 24 are attached to the cover 11 or the base 1 by using suitable frame-shaped metal fittings. To

Here, the housings of the carriage 9 and the actuator 10 are not hermetically sealed, but the housing parts 9A and 10A corresponding to the downstream side of the air flow.
The member constituting the casing is installed in the portion of (3), and the other casing portions are in an open state so that the airflow can flow into the actuator 10 and the carriage 9.

When the disk medium 5 of such a magnetic disk device is rotated at a high speed, an air flow is generated by the centrifugal force field of the disk medium 5, and the pressure in the peripheral portion of the disk medium 5 is lower than the pressure in the central portion of the disk medium 5. Get higher The spoiler 21 shields the downstream side of the arm 8 of the flow path of the air flow generated by this pressure difference, and the upstream side of the arm 8 is shielded by a shield plate 22 along the outer periphery of the disk medium 5 to rotate the disk medium 5. Most of the air flow accompanying the above is guided to the carriage 9 and the actuator 10.

In this way, the airflow generated on the outer periphery of the disk medium 5 moves in the direction of the arrow other than the arrow indicated by A, passes through the inside of the pair of upper and lower filters 24 to remove dust, and further covers. 11. The air passes through the air passage 25 formed by cutting the base 1, and is guided to the central portion of the disk medium 5 through the opening of the hub mechanism 4.

In this way, the spoiler 21 forcibly discharges the dust accumulated between the disk media 5 or rotating with the disk media 5 to the outside of the disk media 5 and passing through the inside of the actuator 10. An air stream can be formed.

Therefore, since the airflow is introduced into the carriage 9 and the actuator 10 where dust is most likely to be generated inside the apparatus, the generated dust is effectively removed.

Furthermore, since a stable air flow is introduced into the actuator 10, it is possible to prevent heat generation of the coil inside the actuator.

Further, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a plan view of the second embodiment of the present invention, and FIG. 7 is a cross-sectional view of the main part thereof. In this embodiment, as shown in FIGS. 6 and 7, the flat carriage 31 is used.
Is installed by being sandwiched between a pair of opposing yokes 32 and permanent magnets 33, and an actuator 34 is formed.
1 moves the carriage 31 in the direction perpendicular to the plane of the drawing.

In the magnetic disk device having the actuator 34 having such a structure, after the spoiler 21 and the shielding plate 22 are similarly attached, the upper and lower surfaces of the casing of the actuator 34 are opened and the filter 35 is directly attached to the portion. Make it a structure. Then, the device has a more compact structure, and the cooling effect of the coils inside the actuator 34 is further enhanced.

Furthermore, FIGS. 8 and 9 show a third embodiment of the present invention.
It will be described with reference to the drawings.

FIG. 8 is a plan view of a third embodiment of the present invention, and FIG. 9 is a side view schematically showing the main part of this device.

As shown in FIGS. 8 and 9, after the spoiler 21, the shield plate 22, and the partition plate 23 are provided as described above, the uppermost disk 5A and the lowermost disk 5 of the stacked disk media 5 are provided. 5B A pair of opposing discs 41, 4 facing B
2 is provided, and ring-shaped filters 43 and 44 are provided inside the opposing discs 41 and 42.

Furthermore, by extending the space formed by the opposing disks 41, 42,
At the extended opening end, a pair of vertically opposed filters 45, 46 are provided on the downstream side when viewed from the moving direction of the air flow of the spoiler 21.
To provide.

By doing so, there is an effect that the dust generated in the apparatus can be sufficiently removed.

〔The invention's effect〕

As described above, according to the magnetic disk device of the present invention,
It is possible to effectively remove the dust in the actuator portion where dust is likely to be generated inside the device, and also to sufficiently enhance the cooling effect for the coil inside the actuator, and to obtain a highly reliable magnetic disk device. effective.

[Brief description of drawings]

FIG. 1 is a plan view of the magnetic disk device of the present invention, FIG. 2 is a side view schematically showing the magnetic disk device of the present invention, and FIG. 3 is a side view showing a main part of the magnetic disk device of the present invention. 4 is a perspective view showing an essential part of the device of the present invention, FIG. 5 is a sectional view taken along line IV-IV 'of FIG. 4, and FIG. 6 is a second embodiment of the magnetic disk device of the present invention. FIG. 7 is a cross-sectional view of an essential part of a second embodiment of the magnetic disk device of the present invention. FIG. 8 is a plan view of a third magnetic disk of the magnetic disk device of the present invention. The drawing is a side view showing the essential parts of a third embodiment of the magnetic disk apparatus of the present invention. FIG. 10 is a sectional view schematically showing a conventional magnetic disk device. In the figure, 1 is a base, 4 is a hub mechanism, 5, 5A and 5B are disk media, 7
Is a magnetic head, 8 is an arm, 9,9A, 31 is a carriage, 10,
10A and 34 are actuators, 11 is a cover, 21 is a spoiler,
22 is a shielding plate, 23 is a partition plate, 24, 35, 45, 46 are filters, 25
Is a passage, 32 is a yoke, 33 is a permanent magnet, 41 and 42 are discs, and 43,
44 is a ring filter, 101 is a guide, and A is an arrow indicating the direction of rotation of the disk medium.

Claims (3)

[Claims] 1. A spindle equipped with a spindle for rotating disk media stacked at a predetermined interval, a magnetic head inserted between the stacked disk media and flying above the disk media, and an arm for accessing the arm. A magnetic disk device comprising an actuator and a cover for accommodating the spindle, the arm and the actuator, wherein the magnetic disk device is located downstream of the arm (8) as viewed from a flow of an air flow generated by rotation of the disk medium (5). Install the spoiler (21) inserted between the disk media (5),
A shield plate (22) along the peripheral edge of the disk medium (5) stacked upstream of the arm (8) as seen from the air flow.
, A part of the base (1) on which the spindle is installed is cut, and an air passage (25) is provided together with a partition plate (23) installed on the base (1), and a carriage (9) and an actuator (10) are provided. And a pair of filters (24) are installed on the upper and lower parts of the closed space by the shielding plate (22), the spoiler (21) and the partition plate (23). Magnetic disk drive. 2. The upper and lower plates of the casing of the actuator (34) are opened, and a pair of upper and lower filters (35) is attached to the opening, and the upper and lower plates are attached. Magnetic disk device. 3. The uppermost disk medium (5A) and the lowermost disk medium (5) of the stacked disk media (5).
Ring-shaped filters (4
3,44) A pair of opposed discs (41,4)
2) is provided, a space portion constituted by the pair of upper and lower opposed discs (41, 42) is extended and guided into the closed space, and a filter (45) is provided at an end portion of the extended upper and lower space portions. The magnetic disk drive according to claims (1) and (2), characterized in that the magnetic disk drive is mounted.