JPH01106389A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To improve reliability by providing an exhausting filter to distribute with the internal part of a head disk assembling (HDA) at the center of the rear edge part of a magnetic circuit and air-flowing a metal powder existing in a device, a wear powder generated at the time of the seeking action of a carriage, etc., in the direction of the exhausting filter. CONSTITUTION:A magnetic head 23 fitted to a carriage 6 is made to execute a linear reciprocating motion in the radial of a magnetic disk group 9, and at the center part of the rear edge of a magnetic circuit 7, an exhausting filter 17 is provided, which distributed with the internal part of an HDA 2. Thereafter, the air-flowing in the internal part of the HDA 2 forms a negative pressure part near the center of a spindle 5, the clean air to pass through a circulating filter 2 passes through a clamp ring 16, a spindle hub 11, and the opening part of a spacer ring 15, the air flows out between the plates of the magnetic disk group 9, and the air to be exhausted in the radial of the above-mentioned inter-plate forms an air flowing loop to flow into the circulating filter 20. Further, a fine air capacity from the exhausting filter 17 passes through a space part of the magnetic circuit 7 and flows out to the external part of the HDA 2, and the air amount which is equivalent to that of the flowing out air, is made flown in from a respiration filter 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device of a closed structure type having a self-internal circulation type air flow type.

[Conventional technology]

Conventionally, in this type of magnetic disk drive, a breathing filter is provided outside the housing base, and a circulation filter is provided inside the housing base. The air was supplied through a breathing filter, and the air inside the HDA was cleaned using a circulation filter.

[Problem that the invention seeks to solve]

The above-mentioned conventional magnetic disk drive is configured so that the leakage of air inside the HDA to the outside of the HDA is discharged from any part of the sealing part of the entire HDA. Alternatively, during the airflow process in which abrasive materials generated during the seek operation of the carriage are removed by the circulation filter, some of the dust causes a short path and adheres to the magnetic head or magnetic disk.
This has the problem of disturbing the magnetic recording and reproducing of information and inducing head crash accidents that are fatal to magnetic disk drives.

[Means for solving problems]

A magnetic disk device of the present invention includes a magnetic disk, a magnetic head provided corresponding to the magnetic disk, a spindle rotation mechanism that supports and rotates the magnetic disk, and a housing base that holds the spindle rotation mechanism.
A magnetic disk drive including a breathing filter and a circulation filter provided on the housing base, a carriage for holding the magnetic head, and a magnetic circuit for driving the carriage, the magnetic circuit having a discharge filter.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway plan view showing an embodiment of the magnetic disk device of the present invention.

In the magnetic disk device of this embodiment, an HDA 2 is mounted on a base plate 1, and the HDA 2 includes a housing base (U) 3, a housing base (L) 4, a spindle 5. Carriage 6, magnetic circuit 7° frame 8. It consists of a cover (not shown).

The spindle 5 has a spindle hub 11. Bearings 12 and 1
3. Shaft 10. The magnetic disk group 9 is stacked on the spindle hub 1'1 via a spacer ring 15, and the clamp ring 16 is composed of a spindle pulley 14.
It is fixed to the spindle hub 11 by. This spindle 5 is provided with the rotational driving force of the motor by a belt 25 that is hooked around a spindle pulley 14 attached to a shaft 10 and a pulley (not shown) of a dedicated motor (not shown), and a magnetic It is configured to rotate the disk group 9. A breathing filter 19 is mounted on the outside of the housing base (U) 3, and a circulation filter 20 is mounted on the inside.

On the other hand, a magnetic head 23 is mounted on the carriage 6, and the carriage 6 is reciprocated in a straight line due to the repulsive force between the magnetic field of the magnetic circuit 7 and the magnetic field generated by applying a current to the coil 18 fixed to the carriage 6. The magnetic head 23 attached to the carriage 6 is caused to linearly reciprocate in the radial direction of the magnetic disk group 9. An exhaust filter 17 that communicates with the inside of the HDA 2 is provided at the center of the rear end of the magnetic circuit 7 .

In the embodiment of the present invention configured in this manner, the air flow inside the HDA 2 is controlled by forming a negative pressure section near the center of the spindle 5, as shown by the arrow in FIG. Ring 16. Spindle hub 11. The air that passes through the opening of the spacer ring 15, flows out between the plates of the magnetic disk group 9, and is discharged in the radial direction between the plates of the magnetic disk group 9 forms an air flow loop that flows into the circulation filter 20. Also, the exhaust filter 17
A smaller air volume passes through the space of the magnetic circuit 7 and the IE (DA2
The air flowing out to the outside and equivalent to the amount of air flowing out passes through the breathing filter 19.
It has an air-free configuration that allows more air to flow in.

〔Effect of the invention〕

As explained above, the present invention has a simple configuration in which an exhaust filter that communicates with the inside of the HDA is provided at the center of the rear end of the magnetic circuit. The airflow ensures that particles such as powder are directed toward the exhaust filter, preventing them from adhering to magnetic heads and magnetic disk drives, which can disturb information recording and playback and cause fatal head crash accidents for magnetic disk drives. This has the effect that a highly reliable magnetic disk device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing an embodiment of the magnetic disk device of the present invention. 2...Head disk assembly (HDA), 3.
...Housing base (U), 4...
・Housing base (L), 5... Spindle, 7... Magnetic circuit, 17... Exhaust filter, 19... Breathing filter, 20...・・・
・Circulation filter. Agent Patent Attorney Susumu Yo1hara

Claims (1)

[Claims] A magnetic disk, a magnetic head provided corresponding to the magnetic disk, a spindle rotation mechanism for supporting and rotating the magnetic disk, a housing base holding the spindle rotation mechanism, and a breathing filter and circulation provided on the housing base. What is claimed is: 1. A magnetic disk device comprising a filter, a carriage for holding the magnetic head, and a magnetic circuit for driving the carriage, characterized in that the magnetic circuit is provided with a discharge filter.