JPH0363991A - Hardware disk drive device - Google Patents

Abstract

PURPOSE:To realize a filter mechanism, which is effective for practical use, for a hardware disk drive device to load a low floating magnetic head by providing a member, to which a charging filter is stacked, between plural disks. CONSTITUTION:Since the charging filter 13 is provided in an arm to support the magnetic head 12, worn particles are attracted by static electricity, which is provided in the charging filter 13, stacked to the surface of the charging filter and caught when an air current including the generated worn particles comes near the arm. Accordingly, the worn particles at the time of activation not to caught by a circulating filter 18 can be speedily caught. When the magnetic head 12 is floated from the surface of the magnetic disk 18 and the magnetic disk 17 reaches normal rotation, the circulating filter 18 is mainly operated and air in the device is kept clean. Thus, the dust catching filter mechanism can be realized to be extremely effect for the practical use in the case the hardware disk drive device especially using the low floating slider.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hard disk drive device.

In conventional hard disk drives, information is read and written by slightly floating a slider provided with a magnetic head above a magnetic disk surface. The slider flies above the surface of the magnetic disk by the airflow generated by the rotation of the magnetic disk. Conventionally, air filters were used to capture dust inside the hard disk drive device at >h. Most letters were installed just outside the outer periphery of the magnetic disk, or the air flow path was installed a little further away from the magnetic disk. However, this type of system could not function as a filter without the air circulation generated by the rotation of the magnetic disk during startup. In addition, in the contact start/stop method where the slider and magnetic disk rub against each other when the device starts and stops, dust is generated, and the most dust is generated when the magnetic disk starts rotating. Just before rotation stops, the air circulation generated by the magnetic disk is very weak, so the filter is not functioning to its full potential.

Problems to be Solved by the Invention For this reason, there is a high probability that the generated dust will enter the small gap between the head and the magnetic disk before being captured by the filter, causing scratches on the slider and the surface of the magnetic disk. There was a problem in that it was a major cause of head crashes. In addition, in recent years, with the increase in recording density, the flying height of sliders has been reduced to 0.1 microns, and dust disposal with a diameter of 0.1 microns has become a problem. However, the diameter is 0.
For dust of 5 microns or less, Brownian kinetic force is superior to gravity sinking blades, so even when the device is stopped, 0.5 □
Dust with a particle size of less than 100 mL does not settle and always floats, making it very likely that it will adhere to the surface of the magnetic disk or slider. However, there was no corresponding filter to capture even floating particles when stopped.

The present invention has been made in view of the above points, and an object of the present invention is to provide a hard disk drive device equipped with a dust trapping filter mechanism that is extremely effective in practice, especially in the case of a hard disk device using a low-flying slider. shall be.

Means for Solving the Problems The present invention provides a member between a plurality of disks, each having one end fixed to the outside, and a charged filter is fixed to the member, so that the probability of contact between the air between the magnetic disks and the filter is reduced. It was constructed to be as high as possible.

Function: Due to the structure described above, dust that is generated at startup and stoppage, which cannot be captured by air circulation filters, can be quickly captured, and the drive device is completely stopped. Even when the magnetic disks are closed, dust floating in the air between the magnetic disks can be attracted to the charged filter by electrostatic force and captured.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. In FIG. 1, reference numeral 11 denotes a drive device enclosure, which contains a plurality of magnetic disks 17 that rotate in the direction of A, and a shaft 16 that is driven by a voice coil motor 16.
A magnetic head 12 is attached to the tip of an arm unit integrated with the carriage, and a charged filter 13 is attached to the arm unit with adhesive. There is. A circulation filter 18 is also provided that utilizes the air flow generated by the rotation of the magnetic disk.

The operation will be explained below. The drive device shown in Figure 1 is similar to a normal drive device, in which the magnetic disk starts rotating with the slider in contact with the magnetic disk surface, and the slider and the magnetic disk surface come into contact with each other just before the magnetic disk stops. Contact that gradually stops while
It is a start-stop method. First, at startup, the power is turned on and the magnetic disk 17 begins to rotate, but when the magnetic disk 1 reaches a certain rotation speed, the magnetic head 12 floats up due to the air current above the magnetic disk surface, and just before it leaves the magnetic disk surface. During this time, the magnetic head rubs against the magnetic disk, and at this time, abrasion powder is generated on the surface of the magnetic disk. However, at this time, the magnetic disk is in the low-speed rotation range after it has started rotating, so the air pressure difference created by the high-speed rotation of the magnetic disk is used to filter the air through the circulation filter 1.
8 is in a state where 1 is not functioning. In other words, the generated abrasion powder returns to the vicinity of the magnetic head along with the air flow on the surface of the magnetic disk, enters the gap between the magnetic head and the magnetic disk, which is about to float, and damages the magnetic disk and the magnetic head. There is a high possibility that this will occur. This also causes a head crash. However, since the charging filter 13 is provided on the arm that supports the magnetic head, when the air flow containing the generated abrasion particles comes near the arm, the abrasion particles are attracted by the electrostatic force of the charged filter, and the abrasion particles are attracted to the charged filter. It attaches to surfaces and is captured. Therefore, it is possible to quickly remove abrasion particles during startup that cannot be captured by a circulation filter. When the magnetic head floats above the surface of the magnetic disk and the magnetic disk reaches a steady rotation speed, the circulation filter 13 mainly works to keep the air inside the device clean. Furthermore, just before the drive device stops, the rotational speed of the magnetic disk decreases, and after the magnetic head falls onto the magnetic disk, the magnetic disk completely stops! During this period, the magnetic head comes into contact with the magnetic disk and rubs against it, just as it does during startup, resulting in wear and tear. However, with a normal drive device that only has a circulation filter, the circulation of air due to the rotation of the magnetic disk becomes weak and disappears! Since this state is about to start, this abrasion powder is not captured by the circulation filter, but is left behind in the housing, and the drive device is completely stopped.
It is uno. Moreover, particles with a diameter of α5□chron or less are always suspended in the air because the force of Brownian motion caused by collisions of air molecules is stronger than the sinking force caused by gravity. In a drive device equipped with a low-flying magnetic head with a diameter of 0.5 to 0.1 micron, this zero
．． Floating particles of 6 microns or less can be a fatal cause of head crash when they re-adhere to the disk surface or become dust when the drive device is restarted. However, the charged filter 13 can capture wear particles that are generated just before the drive device is stopped, as well as when the drive device is started, and even after the drive has completely stopped, floating particles can still approach the charged filter. As the particles are attracted and captured by the electrostatic force, the number of airborne particles in the device continues to gradually decrease, and the air is gradually purified.

Next, FIGS. 2 and 3 regarding the second embodiment.

This will be explained using FIG. 21 in FIG. 2 is an integrally molded plastic member having a plurality of parallel fins. Charged filters 22 are attached to the bottom surface of the topmost fin, both sides of the middle fin, and the top surface of the bottom fin, respectively. This filter mechanism is inserted into the drive device at position 31 shown in Figure 3 so that the fins are positioned parallel to each other between the disks, between the uppermost magnetic disk surface and the enclosure, and between the lowermost disk surface and the enclosure, similar to the arm. and fixed to that one enclosure. Fourth
The figure shows the vertical positional relationship between the magnetic disk 43 and the filter mechanism 41, where 42 is a charged filter, 44
is an enclosure.

By configuring as described above, the charged filter has a large area, which increases the probability of capturing abrasion particles, and it becomes possible to capture a large amount of abrasion particles more quickly. still,
In the fin of the filter mechanism in the second embodiment, the sixth
A similar effect can be obtained by providing a plurality of holes as shown in the figure and pasting the charged filter 52 on only one side of the fin.

Effects of the Invention By providing a member with a charged filter attached between multiple disks, the present invention eliminates dust generated immediately after drive startup and just before drive stop, which was difficult to capture with conventional air circulation filters. , which are quickly captured and removed by electrostatic force. In addition, even when the drive device is not operating, it gradually captures floating dust and purifies the air, making it an extremely effective filter for hard disk drive devices equipped with low-flying magnetic heads. It provides a mechanism.

[Brief explanation of drawings]

FIG. 1 is a plan view of a drive device according to a first embodiment of the present invention, FIG. 2 is a diagram of a filter mechanism of the second embodiment, and FIG. 3 is a plan view of a drive device according to a second embodiment of the present invention. , FIG. 4 is a cross-sectional view of the drive device of the second embodiment, and FIG. 5 is a diagram of a filter mechanism of a type in which a filter is attached on one side. 11... Enclosure, 16...
Whisker coil motor 16...shaft, 17...
...magnetic disk, 18 ... -- circulation filter

Claims (1)

[Claims] (1) A plurality of magnetic disks, a magnetic head, an arm for holding the magnetic head, and a charged filter for capturing dust, the charged filter being located between the magnetic disks. Features of hard disk drive equipment. (2) The hard disk drive device according to claim 1, wherein the charged filter is fixed to the arm. (2) The hard disk drive device according to claim 1, wherein the charged filter has one end fixed to the outside and fixed to a cantilever member inserted between the magnetic disks. (4) The hard disk according to claim 1, wherein the cantilever member has a plate shape, is inserted between the magnetic disks in parallel with the magnetic disks, and has the charged filter affixed to at least one surface thereof. drive device.