JP2985418B2 - Magnetic disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, and more particularly to an air cleaning mechanism for removing oil mist from a magnetic head positioning mechanism.

[0002]

2. Description of the Related Art As shown in FIG. 3, a magnetic disk drive stacks and holds a plurality of magnetic disks 1 via a spacer ring, and rotates together with a spindle hub 9.

A magnetic head 2 for writing and reading data to and from the magnetic disk 1 is attached to the tip of a gimbal spring. At both ends of the arm holder 4, bearings 6 are provided and attached to a shaft 5, and the shaft 5 is attached to a carriage base 7.

[0004]

By the way, in the conventional magnetic disk drive, an arm holder 4 to which the arm 3 is attached is provided.
And the bearing 6 fixed to the shaft 5 rotates during the movement of the magnetic head, so that grease is scattered.
This oil mist may adhere to the magnetic disk or the magnetic head 2 and damage the magnetic disk 1.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic disk drive in which oil mist from a bearing is efficiently collected to prevent oil mist from scattering into the apparatus.

[0006]

In order to achieve the above object, in a magnetic disk drive according to the present invention, a rotating shaft, a magnetic head, an arm, an arm holder, a bearing, a carriage base, and a carriage bearing surface are provided. And a filter, wherein the rotating shaft rotates integrally with a spindle hub that stacks and holds a plurality of magnetic disks via a spacer ring, and the magnetic head includes the magnetic disk. An arm for supporting the magnetic head, an arm holder for holding the arm, and a bearing for supporting the arm holder. The carriage base supports the shaft, and the carriage base holds the shaft. Is provided between a carriage bearing surface facing the atmosphere in the magnetic disk device and a flow path for venting the atmosphere in the magnetic disk device, and a glass fiber filter or an electrostatic type that collects oil mist leaking from the bearing. Filter.

[0007]

The filter provided in the gap between the arm holder and the carriage base holding the shaft collects oil mist from the bearing and prevents the oil mist from scattering into the apparatus.

[0008]

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

FIG. 1 is a sectional view showing a first embodiment of the present invention.

In the embodiment shown in FIG.
A magnetic head 2 for writing and reading data, an arm 3 for supporting the magnetic head 2, an arm holder 4 for attaching and holding the arm 3, and an arm holder 4
And a carriage base 7 holding the shaft 5 to form a magnetic head positioning mechanism.

The spindle hub 9 holding the magnetic disk 2 rotates at a constant rotation, and the magnetic head 2 flies at a small interval from the surface of the corresponding magnetic disk 2 by an air flow generated by the rotation. Reading and writing of data are performed.

When the magnetic head 2 is moved to the track on which the data is written and read, the arm holder 4 rotates through the bearing 6, and the grease leaking from the bearing 6 becomes oil mist, and the inside of the magnetic disk device Splatters.

In the present invention, an electrostatic filter 8 is provided in a gap between the arm holder 4 and the carriage base 7. The electrostatic filter 8 is formed by charging charged fibers made to have a permanent charge in a non-woven bag.
Dust (oil mist) is adsorbed and collected by the action of Coulomb force and induced force generated between the charged fiber and dust.

FIG. 2 is a diagram showing a main part of a second embodiment of the present invention. In this embodiment, the electrostatic filters are provided as 8a and 8b not only on the carriage base 7 on the fixed side but also on the arm holder side 4 on the movable side.

By providing an electrostatic filter 8a on the carriage base and an electrostatic filter 8b on the arm holder, a labyrinth structure is provided so that oil mist is scattered inside the magnetic disk drive. Can be reduced.

The filter can be made of a commonly used glass fiber.

[0017]

As described above, according to the present invention, since the electrostatic or glass fiber filter is provided between the arm holder and the carriage base, oil mist from the carriage bearing can be effectively collected. This has the effect of reducing failures and improving reliability.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a second embodiment of the present invention.

FIG. 3 is a plan view of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 magnetic disk 2 magnetic head 3 arm 4 arm holder 5 shaft 6 carriage bearing 7 carriage base 8, 8a, 8b electrostatic filter 9 spindle hub

Claims (1)

(57) [Claims] 1. A magnetic disk drive having a rotating shaft, a magnetic head, an arm, an arm holder, a bearing, a carriage base, a carriage bearing surface, and a filter, wherein the rotating shaft includes a plurality of rotating shafts. A magnetic disk that rotates integrally with a spindle hub that stacks and holds the magnetic disks via a spacer ring; a magnetic head that reads and writes data from and to the magnetic disk; An arm holder holds the arm, a bearing supports the arm holder and pivots on a shaft, and a carriage base holds the shaft. The filter has a carriage bearing surface facing the atmosphere inside the magnetic disk drive and a magnetic disk drive. The apparatus internal atmosphere is provided between the flow path to vent, a magnetic disk apparatus which is a glass fiber filter or electrostatic filter for collecting oil mist leaked from the bearing.