JPH02257489A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent a head crush due to dispersion of a lubricant applied on a magnetic disk surface and to promote the reliability by providing a highmolecular absorber on the inner wall part of an enclosure. CONSTITUTION:The absorber 10 for absorbing oil and moisture is provided on the inner wall part of the enclosure 6 for a head disk assembly (HDA). In the magnetic disk device of a contact-start-stop system, the lubricant is applied on the surface of the magnetic disk 1 to protect the surface of the magnetic disk 1 from abrasion due to contact with a magnetic head 2. Since the head 2 is floated during a normal operation, the magnetic disk 1 is rotated at high speed, and the lubricant and moisture are gradually dispersed by centrifugal force, but they are absorbed quickly into the highmolecular absorber 10 provided on the inner wall of the enclosure for HDA. By this method, the device is free from such a fault that the head crush takes place to cause a serious disorder.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a magnetic disk device.

[Conventional technology]

Conventionally, this type of magnetic disk device has a magnetic disk 1 and a magnetic head 2, as shown in FIG.

Head positioning mechanism (carriage 3. voice coil 4.
A head disk assembly (Head Disk assembly) in which a magnetic circuit 5), etc.
k assembly (hereinafter referred to as HDA) is used as an information storage device.

[Problem to be solved by the invention]

In the HDA of the conventional magnetic disk device described above, a lubricant is applied to the surface of the magnetic disk, and this lubricant gradually scatters due to the centrifugal force exerted by the high-speed rotation of the magnetic disk. On the other hand, since the HDA has sliding parts such as bearings in the positioning mechanism, dust is generated from these parts when operated for a long period of time.

Although some of these dust particles are removed by an air filter provided within the HDA, they are not completely removed and remain floating within the HDA. As mentioned above, the lubricant scattered from the magnetic disk condenses on the inner wall of the HDA enclosure 6, including the internally generated dust, and when it grows to a certain size, it falls or scatters again. At this time, if it falls onto the magnetic head 2 or the magnetic disk 1 that is floating on the surface of the magnetic disk at a minute interval, the flying posture of the head will collapse and the magnetic head 2 and the magnetic disk 1 will come into contact, resulting in a so-called head crash. However, it had the major drawback of causing serious problems.

An object of the present invention is to provide a magnetic disk device that solves the above problems.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a head disk assembly (Head Disk Assembly) in which a magnetic disk, a magnetic head, a positioning mechanism, etc. are housed in a sealed container.
In the magnetic disk drive using the head disk assembly, an absorbent material for absorbing oil and moisture is provided on the inner wall of the closed container of the head disk assembly.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of a magnetic disk device showing one embodiment of the present invention.

The IOA (of the magnetic disk device according to the present invention) houses a magnetic disk 1, a magnetic head 2, and a positioning mechanism (carriage 3, voice coil 4, magnetic circuit 5, bearing 7, etc.) in its enclosure 6.

A plate-shaped polymer absorbent lO is pasted on the inner wall of the HDA enclosure 6.

Next, its operation will be explained.

In today's most common magnetic disk drives of the contact start/stop method (a method in which the magnetic head is in contact with the surface of the magnetic disk when starting and stopping the magnetic disk), the surface of the magnetic disk 1 is connected to the magnetic head 2. A lubricant is applied to the surface of the magnetic disk 1 to protect it from wear due to contact.1 During normal operation, the magnetic disk 1 rotates at high speed to keep the magnetic head 2 flying. The aforementioned lubricant and moisture are gradually scattered by centrifugal force, but are quickly absorbed by the polymer absorbent material 10 provided on the inner wall of the HDA enclosure 6.

〔Effect of the invention〕

As explained above, the present invention has the following advantages: (1) By providing the inner wall of the DA enclosure with a polymer absorbent material, even if the lubricant applied to the surface of the magnetic disk is scattered due to centrifugal force due to high-speed rotation of the magnetic disk, the above-mentioned Because it is quickly absorbed by the polymeric absorbent material, it prevents internally generated dust from condensing on the inner wall of the HDA enclosure, which is common in conventional devices, and from scattering and falling within the DA again. This has the effect of preventing head crashes caused by lubricant scattering and realizing a highly reliable magnetic disk device.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional example. 1...Magnetic disk 2...Magnetic head 3...
・Carriage 4...Voice coil 5...Magnetic circuit 6...Enclosure 7...Bearing 1o...Polymer absorbent material patent applicant 1
NEC Corporation Figure 1

Claims (1)

[Claims] (1) Head disk assembly (He
What is claimed is: 1. A magnetic disk device using an ad disk assembly, characterized in that an inner wall of a closed container of the head disk assembly is provided with an absorbent material that absorbs oil and moisture.