JPS62121977A - Air filter for magnetic disk device - Google Patents

Abstract

PURPOSE:To effectively prevent dust from scattering and falling by installing a chamber with the prescribed recessed part at the preceding stage of an air filter and fitting on the entrance of the chamber a valve closing only in a direction where air flows. CONSTITUTION:The chamber 12 with the hollow 17 at its bottom is installed on the preceding stage of the air filter 9, and the plate 14 capable of opening only in the air flowing direction is fitted on a shaft in the entrance 13 so that it can freely open and close. With this constitution, the plate 14 takes the position of a chain line 16 in operation, and air flows in one direction. At the time of stoppage, the plate 14 is attracted to a magnet 15, and the chamber 12 is sealed hermetically. Accordingly the scattering and falling of the dust settling in the hollow 17 can be effectively prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic disk drive, and particularly to an improvement of an air filter for cleaning internal air suitable for preventing dust generation.

[Background of the Invention] In a magnetic disk device that uses a magnetic disk as a recording medium, information is recorded on the magnetic disk surface by a magnetic head that floats above the magnetic disk surface due to the balance of aerodynamic forces due to the rotation of the magnetic disk. , is playing.

In order to increase the storage density of information on the magnetic disk surface, the flying height of the magnetic head has become extremely narrow, a few micrometers, and in order to remove minute dust, the room in which the magnetic disk rotates has been moved outside. The internal dust removal air filter is installed in the air flow path generated by the rotation of the magnetic disk.

In conventional devices, as described in JP-A-59-129974, a filter is provided to filter out dust contained in the air in a closed room, and although it performs the function of an air filter, it also prevents dust from falling and scattering. No consideration was given to what to do.

Furthermore, in the magnetic disk drive described in Japanese Patent Application Laid-Open No. 59-165281, an air filter is provided to filter the air blown out by the rotation of the magnetic disk. No consideration was given to dust generation due to falling dust.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air filter that prevents dust collected on an air filter provided in a flow path of air generated by the rotation of a magnetic disk from scattering and falling back into a magnetic disk rotation chamber. be.

[Summary of the invention]

The present invention provides a valve that opens only in the direction of air flow in a room provided in front of an air filter provided in the room where the magnetic disk rotates, and a dish-shaped valve that receives dust that falls to the bottom of the air filter in the room. By providing a recessed part, dust can be scattered.

Falling can be prevented and the above objective can be achieved.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. According to this embodiment, a disk 2 is stacked on a base 1 at a certain interval with a hub 3, a spacer 5 with an air hole 4 formed therein, and is fastened with a clamp 7 with an air hole 6 formed therein.
Rotationally driven by a motor.

The magnetic disk drive of this embodiment has a sealed structure surrounded by covers 8 and 1, and the air flow generated by the rotation of the disk 2 passes through the air filter 9 as shown by the arrow, and passes through the cover 8 and the plate. Pass through room 11 surrounded by 10,
The air is sucked into the air hole 6 and blown out from the air hole 4.

A chamber 12 is provided in front of the air filter 9, and a plate 14 serving as a valve is attached to the inlet 13 of the chamber 12 by a shaft 15. When the air filter 9 is stopped, the plate 1
4 is attracted to the magnet 15, and the room 12 is sealed.
During driving, as shown by the dashed line 16, the structure is such that it opens due to the flow of air due to the pressure difference.

In addition, the dust that fell from the air filter 9 during the stoppage is stored in the room 12.
was formed into. Recess 17 at the bottom of air filter 9
is precipitated. That is, when the machine is stopped or transported, the dust collected in one room does not scatter or fall outside.

〔Effect of the invention〕

According to the present invention, it is possible to prevent dust from scattering and falling from the dust collecting air filter in the magnetic disk storage chamber.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal sectional view of a portion of a disk storage section of a magnetic disk device according to the present invention. 2... Disc, 4, 6... Air hole, 9... Air filter, 12... Room, 14... Plate, 17
...Kubomi.

Claims (1)

[Claims] 1. In a magnetic disk device in which a spindle carrying a magnetic disk is assembled into a base and sealed by an enclosure, a room is provided in front of an air filter for cleaning internal air installed in the flow path of the wind generated by the rotation of the magnetic disk, An air filter for a magnetic disk device, characterized in that a valve that opens only in the direction of air flow is provided at the entrance of the chamber.