JPH01192075A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce the stain of a head due to dust generated in a DE and to reduce the fault of head crash by always sending a fresh air between disks from the sinking comb of a cavity type spoiler. CONSTITUTION:An air circulation path in the DE is formed by the rotation of the disk 2 in such a way that A becomes an air discharge outlet and B becomes an air flow inlet. And a filter 8 is provided at a part where pressure at an outlet side A is comparatively high, and the air is blown by the filter 8, and a discharge outlet 13 side is connected by a sinking comb shape cavity type spoiler 15 arranged at the inlet B with comparatively low pressure and a duct 14. The air (a) discharged from the disk 2 is blown in the filter 8, and the clean air (a') passes through the duct 14, and is guided by the spoiler 15, then, sent between each disk 2.

Description

[Detailed Description of the Invention] [Summary] An object of the present invention is to provide a magnetic disk device having a structure that captures dust generated in a closed container, and which does not cause head dirt or disk dirt. , a magnetic disk device comprising an actuator having a head arm and a spindle for holding and rotating a plurality of disks, housed in a closed container, an air cleaning filter number, and the disks under relatively high pressure in the closed container. A comb-shaped hollow spoiler is installed near the inter-disc air inlet B, and the filter's outlet is connected via a duct. Configure it so that it exists.

[Industrial application field]

The present invention relates to a magnetic disk device having a structure for capturing dust generated in a closed container.

A miniaturized magnetic disk device is called a disk enclosure (DE) type, in which not only the magnetic head system and recording medium system but also the entire aWJ section are integrated into a sealed module.

Even if the head disk assembly (HDA) is sealed as described above, some dust will still be generated inside the head disk assembly (HDA). The probability of occurrence is high when starting/stopping disk rotation or when driving a positioner. Therefore, in order to ensure the flying stability of a magnetic head of 1 μm or less, it is necessary to remove internally generated dust.

[Conventional technology]

FIGS. 3(a) and 3(b) are diagrams illustrating a conventional magnetic disk device. In the figure, I denotes a base, on which a plurality of discs 2 are held by a spindle 3 and rotated by a motor (not shown). Also, read information on disk 2/
A helad arm 5 (having a magnetic head 4) for writing is fixed to an actuator 6 and placed opposite to the disk 2. Note that 7 is a cover for sealing. An air circulation path formed in an airtight container (hereinafter referred to as DE) by the rotation of the disc 2 has the head arm 5 as the center, with section 8 serving as an air inlet and section A serving as an air outlet. As shown in the figure, a filter 8 is provided in the area where the pressure is high due to the air discharged from the disk 2, and a dust trapping structure is adopted in which the filter inlet 9 is connected to the center of the spindle 3 where the pressure is relatively low by a duct 11. be.

[Problem to be solved by the invention]

The filter 8 is located in the upper part of the DB, and has a filter inlet 9 in a place where the air pressure is high, and the air is discharged through a duct 11 into a place where the air pressure is low, thereby purifying the entire DE air.

In this case, the air discharged from the disc 2 is discharged to the A part and stirred, so it is not necessarily 100% purified by the filter, and some air flows to the head arm 5, and the air between the discs 2 (especially (near the magnetic head 4), there is no guarantee that clean air will always flow. Therefore, there is a problem in that the air bearing surface of the magnetic head 4 and the disk 2 are contaminated, resulting in a head crash failure.

Therefore, it is an object of the present invention to provide a magnetic disk device that does not cause head contamination or disc contamination.

[Means to solve the problem]

The above-mentioned problem is solved by a magnetic disk in which an actuator 6 having a head arm 5 and a spindle 3 for holding and rotating a plurality of discs 2 are housed in a closed container, as shown in FIGS. □ An air purifying filter 8 is provided in the airtight container near the inter-disk chamber air outlet A where the pressure is relatively high, and the outlet 13 of the filter 8 is connected to the outlet 13 of the air filter 8 through a duct 14. The magnetism of the present invention is constructed such that a connected comb-shaped hollow spoiler 15 is installed near the air inlet B between the two discs, and the comb teeth 16 having an air outlet are located between the two discs. Solved by disk device.

[Effect]

That is, the air sucked into the filter 8 from the air outlet A of the DB internal air circulation system is purified by the filter 8, and
Since the air is sent between the disks 2 from the comb teeth 16 of the hollow spoiler 15 via the duct 14, the air near each head arm 5 becomes purified.

As a result, the head is contaminated by the dust generated in the DE, and the disk 2 is also contaminated, thereby preventing the occurrence of head crush failure.

〔Example〕

FIGS. 1A and 1B are diagrams illustrating an embodiment of the present invention. Note that common symbols throughout all figures indicate the same objects.

In Figure 1 (a) (b), the above-mentioned figure 2 (a) (
As in (b), 1 is a base, 2 is a disk, 3 is a spindle, 4 is a magnetic head, 5 is a helad arm, 6 is an actuator, 7 is a cover, and 8 is a filter.

Due to the rotation of the disk 2, the air circulation path in the DB is centered around the head arm 5, with point A serving as an air outlet and point B serving as an air inlet.

A filter 8 for the purpose of air purification is installed in the part of the disk 2 where the pressure is relatively high on the air outlet A side, the air is blown through the filter 8, and the outlet 13 side is connected to the disk 2 where the pressure is relatively low. It is connected by a duct 14 to a comb-like hollow spoiler 15 installed on the air inlet B side of the air inlet B side. A combined perspective view of the comb-shaped hollow spoiler 15 and the duct 14 is shown in the second figure.
As shown in the figure. The comb teeth 16 have a plurality of holes 17 for blowing out air. This hole 17 is made small at the upper stage of the comb teeth 16 because the blowing air pressure is high, and is made larger toward the lower stage because the air pressure decreases. The number and size of the holes 17 are determined by the number of discs, but in this example, when the disc is 10.51 mm, the comb teeth 16 have 5 holes with a diameter of 3φ. 18 is a mounting hole for mounting on the base.

The air a discharged from the disc 2 is blown into the filter 8, and the air a' purified by the filter 8 passes through the duct 14 and is guided to the comb-shaped cavity spoiler 15, and is then sent to each disc 2.
sent in between. As a result, clean air is always sent between the disks 2 during two rotations of the disks, so the air near the head is also purified, and it is possible to prevent the head from being contaminated by dust generated in the DE.

In addition, when observing head dirt using a microscope in a device to which the present invention is applied, it was found that, for example, in a device with 20 head cores, all 20 were dirty under the same usage conditions, but this In the example, the number of contaminants was 10 or less, and the head contamination was reduced to 50% or less.

〔Effect of the invention〕

As explained above, according to the present invention, by constantly sending clean air between the discs from the comb teeth of the hollow spoiler, the air near the head becomes clean, and the head becomes dirty due to dust generated in the DE. is reduced, and head crush failures can be reduced.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are diagrams explaining one embodiment of the present invention, Figure 2 is a perspective view of the combination of the cavity type spoiler and duct of the present invention, and Figures 3 (a) and (b) are diagrams illustrating an embodiment of the present invention. FIG. 2 is a diagram illustrating a magnetic disk device. In the figure, l is the base, 2 is the disk, 3 is the spindle, 4 is the magnetic head, 5 is the navel arm, 6 is the actuator, 7 is the cover, 8 is the filter, 13 is the outlet, 14 is the duct, 15 is the cavity Type spoiler, 16 is a comb tooth, 17 is a hole, \ki = 4 stone 1 ship... Topo Yimei ■ - 4 shoji Toshigami also sees the sun and moon G Kome 1 Mouth Ho Akita F1 sky 1 Sweat and spoilers and the nature of 2nd grade 164 Ushiyori Natsu a 2 /) Thoughts and 1 Qi Scrap! 6 galls ripened with salt 3 fig.

Claims (1)

[Claims] A magnetic disk device comprising an actuator (6) having a head arm (5) and a spindle (3) for holding and rotating a plurality of disks (2) housed in a closed container, A cleaning filter (8) is provided in the airtight container near the inter-disk air outlet A where the pressure is relatively high, and the outlet (13) of the filter (8) is connected via a duct (14). A comb-shaped hollow spoiler (15) is installed near the air inlet B between the discs (2), and a comb-teeth (16) with an air outlet is located between the discs (2). A magnetic disk device characterized by being configured as follows.