JPS6254888A - Magnetic disc device - Google Patents

Abstract

PURPOSE:To effectively eliminate dust at the part of an actuator where the dust in the device are easily to be generated and to increase a cooling effect for the coil in the actuator by providing vertically paired filters in the passage of air flow generated by the rotation of a disc medium in a closed space. CONSTITUTION:A passage 25 through which the air flows is formed by machining a part of a spoiler 21, shielding plate 22, cover 11, and a base 1. The closed space is formed jointly by a partition plate 23 mounted across the passage 25 excluding the part where filters 24 are mounted, the cover 11, a carriage 9 that dusts are easily generated in the equipment, and the actuator 10. And the most part of the air flow generated by rotating disc medium 5 is led to hit the carriage 9 in which dusts are easily generated and the actuator 10. At the upper and bottom ends of the said closed space, the pair of filters 24 are vertically provided to effectively eliminate the dust generated by the carriage and/or the actuator 10.

Description

[Detailed Description of the Invention] [Summary] This is an improvement of a magnetic disk device, which improves the internal pressure of the disk by increasing the air pressure difference between the center and the periphery of stacked disk media. A magnetic disk drive that increases the flow rate of fluid that passes through a filter provided to remove dust, thereby keeping the inside of the device clean.

[Industrial application field]

The present invention relates to a magnetic disk device, and in particular, increases the air pressure difference between the periphery and the center of a disk medium in the device.
The present invention relates to a magnetic disk device that allows clean fluid that has passed through a filter installed in the device to circulate within the device at an increased flow rate.

In magnetic disk drives, there is an increasing demand for improved recording density, and as a result, the flying interval of the magnetic head that flies above the disk medium is becoming narrower and narrower.

Therefore, there is a need for a magnetic disk device that maintains the inside of such a magnetic disk device in a clean state and prevents the Hendokrasosh phenomenon caused by dust generated by the bearings of the carriage driven by the actuator inside the device. ing.

[Conventional technology]

In conventional large magnetic disk devices that use disk media with large diameters, an external blower is installed, and this blower is used to draw clean air from which dust has been removed through a filter into the device, and the air is then circulated. to keep the inside of the device clean.

However, as the device becomes smaller, the disk medium, the spindle for rotating the disk medium, the actuator for moving the arm on which the magnetic head is installed to a predetermined disk position, etc. are sealed in a housing that covers the device. Then, the airflow generated by the pressure difference between the periphery of the disk and the center of the disk caused by the rotation of the disk is passed through a filter to become clean air, and this air is circulated inside the device for self-circulation. A method is being explored.

Such a conventional magnetic disk device will be explained using the schematic diagram of FIG. 10.

FIG. 10 is a schematic diagram of a conventional magnetic disk device. As shown in the figure, a spindle 3 installed on a base 1 and rotated by a motor 2 has a ring-shaped hub with a hollow inside. A mechanism 4 is installed, and disk media 5 are stacked and installed at predetermined positions of the hub mechanism 4 at predetermined intervals. This hub mechanism 4 has an opening 6 between disk media 5 which are stacked in a multilayer structure.

Further, a carriage 9 is installed on the base 1 to move an arm 8 on which a magnetic head 7 is installed to a predetermined trunk position of the disk 4, and an actuator (magnetic circuit )10 are provided. These disk medium 5, carriage 9, actuator 10, etc. are hermetically sealed within a sealing cover 11.

Among the disk media 5, a ring-shaped disk 12 having the same shape as the disk 5A is provided above the topmost disk 5A so as to face the disk 58.
A ring-shaped air filter 13 is installed between the cover 11 and the cover 11. As the disc 5 rotates at high speed, the pressure of the air around the periphery of the disc 5 becomes higher than the pressure of the air at the center of the disc 5.Using this pressure difference, the air inside the device is indicated by the arrow. Like filtere 3
The filter 13 removes dust generated from the bearing 14 at the bottom of the carriage 9 in the apparatus.

[Problem that the invention seeks to solve]

However, in order to move the carriage in such a device, guide rails, rotating rollers, rotating bearings, etc. are required, and it is structurally difficult to separate these bearings to the outside of the device. Grease used in the bearings and dust due to contact friction between the bearings and the guide rails enter the device, creating a problem that this dust cannot be easily removed.

[Means for solving problems]

An object of the present invention is to provide a magnetic disk device that can remove the above-mentioned dust more easily and sufficiently.

As shown in the drawings, 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 FIG. 2, which is a schematic side view. , a flat spoiler 21 is installed behind the arm 8 on which the magnetic head 7 is installed when viewed from the rotational direction of the disk medium 5 shown by arrow A. Further, a shielding plate 22 having a curved surface along the peripheral edge of all the disk media 5 is provided between the top disk medium 5A and the bottom disk medium 5B of the stacked disk media 5.

Further, a part of the base 1 is cut to provide an air passage 25, and a partition plate 23 is provided on the base 1 except for the area where the filter 24 is installed. 22, a closed space is formed by a partition plate 23 and the like, and a pair of upper and lower filters 24 are provided inside this closed space in an area through which an air flow generated by rotation of the disk medium 5 passes.

[Effect]

The magnetic disk device of the present invention includes a spoiler 21, a shielding plate 2
2. The cover 11 and a part of the base 1 are cut to form a passage 25 through which air passes, and the partition plate 23 attached to the passage 25 with the attachment part of the filter 24 removed, the cover 11, and the device. Carriage 9, which tends to generate dust inside;
and actuator 10 to form a closed space,
Most of the airflow generated by the rotation of the disk medium 5 is directed to the carriage 9 and actuator 10 where dust is likely to be generated.

A pair of opposing filters 24 are provided above and below this closed space.
is installed to effectively remove dust generated from the carriage 9 and actuator 10.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

As shown in the drawings, the magnetic disk device of the present invention includes a plan view in FIG. 1, a schematic side view in FIG.
As shown in FIG. 3, which is a sectional view of the main part of the figure, FIG. 4, which is a perspective view of the main part of the entire device, and FIG. A flat spoiler 21 is installed at the rear of an arm 8 on which a magnetic head 7 is installed when viewed from the rotational direction of the disk medium 5 shown by arrow A. Further, a shielding plate 22 is provided on the base 1 so as to have a curved surface along the periphery of all the disk media 5 between the top disk medium 5A and the bottom disk medium 5B of the stacked disk media 5. .

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

In this way, the spoiler 21, the shielding plate 22, and the partition plate 23 including the actuator 10 and the carriage 79 are
A closed space is formed by the cover 11, and a pair of upper and lower filters 24 are provided inside this closed space in a region through which air flow generated by the rotation of the disk medium 5 passes.

This filter 24 is made of glass fiber, which is folded into a rectangular parallelepiped shape.
Cover the edges of the four corners of 4 using appropriate frame-shaped metal fittings, etc.
, or attach it to the base 1.

Here, the casings of the carriage 9 and actuator 10 are not sealed, and the members constituting the casing are installed in the part 9^ of the casing and the IOA part corresponding to the downstream side of the air flow, and the other casings are The structure is such that the portion is open and 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 high speed, an air flow is generated by the centrifugal force field of the disk medium 5, and the pressure at the periphery of the disk medium 5 becomes higher than the pressure at the center of the disk medium 5. It gets expensive. The downstream side of the air flow path generated by this pressure difference with respect to the arm 8 is blocked by a spoiler 21, and the upstream side of the arm 8 is blocked by a shielding plate 22 along the outer periphery of the disk medium 5. Carriage 9 carries most of the air flow accompanying rotation.
and the actuator 10.

In this way, the airflow generated around the outer periphery of the disk medium 5 moves in the direction of the arrow other than the arrow A, passes through the inside of the pair of upper and lower filters 24, and removes dust. 11, the air passes through an 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 releases the dust staying between the disk media 5 or rotating together with the disk medium 5 to the outside of the disk medium 5, and also forces the dust to pass through the actuator 10. Air flow can be formed.

Therefore, the air flow flows into the carriage 9 and the actuator 10, where dust is most likely to be generated inside the device, so that the generated dust is effectively removed.

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

Furthermore, a second embodiment of the present invention will be explained using FIGS. 6 and 7. FIG. 6 is a plan view of a second embodiment of the present invention, and FIG. 7 is a sectional view of a main part thereof. As shown in FIGS. 6 and 7, in this embodiment, a flat carriage 31
is placed between a pair of opposing yokes 32 and permanent magnets 33, forming an actuator 34, and a guide 101 moves this carriage 31 in a direction perpendicular to the plane of the paper.

In a magnetic disk drive having an actuator 34 having such a structure, after attaching the spoiler 21 and the shielding plate 22 described above in the same manner, the upper and lower surfaces of the housing of the actuator 34 are opened and the filter 35 is directly attached to the openings. Make it a structure. This allows the device to have a more compact structure, and further improves the cooling effect of the coils and the like inside the actuator 34.

Furthermore, FIGS. 8 and 9 regarding the third embodiment of the present invention
This will be explained using figures.

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 parts of this device.

As shown in FIGS. 8 and 9, after providing the spoiler 21, the shielding plate 22, and the partition plate 23 as described above, the uppermost disk 58 and the lowermost disk of the stacked disk medium 5 are A pair of opposing disks 41.42 are provided to face the disk 5B, and a ring-shaped filter 43.44 is provided inside the opposing disks 41.42.

Further, the space formed by the opposing discs 41, 42 is extended, and a pair of upper and lower opposing filters 45, 46 are provided at the extended open end on the downstream side when viewed from the direction of movement of the air flow of the spoiler 21. .

In this way, it is possible to sufficiently remove dust generated within the apparatus.

〔Effect of the invention〕

As described above, according to the magnetic disk device of the present invention,
Dust can be effectively removed from the part of the actuator where dust is likely to be generated inside the device, and the cooling effect can be sufficiently increased for the coil inside the actuator, resulting in a highly reliable magnetic disk device. effective.

[Brief explanation of drawings]

FIG. 1 is a plan view of a magnetic disk device of the present invention, FIG. 2 is a side view schematically showing the magnetic disk device of the present invention, FIG. 3 is a side view showing main parts of the magnetic disk device of the present invention, 4 is a perspective view showing the main parts of the device of the present invention, FIG. 5 is a sectional view taken along line IV-IV' in FIG. 4, and FIG. 6 is a second embodiment of the magnetic disk device of the present invention. FIG. 7 is a sectional view of essential parts 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; FIG. 9 The figure is a side view showing the main parts of a third embodiment of the magnetic disk device 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, 5B are disk media, 7 is a magnetic head, 8 is an arm, 9.9A, 31 is a carriage, 10. IOA, 34 is an actuator, 11 is a cover, 21 is a spoiler, 22 is a shielding plate, 23
is a partition plate, 24.35.45.46 is a filter, 25 is a passage, 32 is a yoke, 33 is a permanent magnet, 41.42 is a disc, 43.44 is a ring filter, 101 is a guide, A
is an arrow indicating the direction of rotation of the disk medium. IA Birou A4 Namiki Tenzu 74 Roasted Hiraishi 1 Blade Figure 1 Figure 2 Figure 3 Figure 411! Q Arrage BH Heisai 2 rows of thousands of words II 6 Diagram: Mokuryo e Tsuki no Sai 2 sudden λρ stops Aji part proverb Kakan Figure 7 Keihatsu = LT's Sai 3rfu 1 Rimehei firJ diagram No. 88! l Tea Invention Talent 39 Examples n Ying Wu° Must Obey Mu Rei Qi 14z 7%i's Section 2′ Yuan IQ Diagram

Claims (3)

[Claims] (1) A spindle that rotates disk media stacked at a predetermined interval, an arm that is inserted between the stacked disk media and includes a magnetic head that flies above the disk media, and an actuator that accesses the arm. , a magnetic disk drive including a cover that accommodates the spindle, the arm, and the actuator, wherein the disk medium is located downstream of the arm (8) when viewed from the flow of airflow generated by the rotation of the disk medium (5). (5) A spoiler (21) inserted between the shielding plates (21) is installed along the peripheral edge of the disk media (5) stacked on the upstream side of the arm (8) when viewed from the airflow.
2), cut a part of the base (1) on which the spindle is installed, and install the shield plate (22) and the spoiler (21) in a form that includes the carriage (9) and the actuator (10). ) and the partition plate (23) form a closed space,
A magnetic disk drive characterized in that a pair of filters (24) are installed at the upper and lower parts of the closed space. (2) The magnetic field according to claim (1), characterized in that the upper and lower plates of the housing of the actuator (34) are opened, and a pair of upper and lower filters (35) are mounted in the openings. disk device. (3) The top disk medium (5A) and the bottom disk medium (5B) of the stacked disk media (5)
A ring-shaped filter (43
, 44) A pair of ring-shaped opposing disks (41
, 42), and the pair of upper and lower opposing discs (41, 42) are provided.
) is extended into the closed space,
A filter (45
, 46), according to claims (1) and (2).