JPS6038773A - Magnetic disc device - Google Patents

Abstract

PURPOSE:To prevent the damage of a head and the surface of a medium by providing a head disc separating mechanism in a head disc assembly and bringing the magnetic head into non-contact with the surface of the magnetic disc medium when the operation is stopped. CONSTITUTION:The head disc separating mechanism is provided in the head disc assembly (HDA); and while the device is operated, a moving lever 8 is moved and fixed in the position of a point B of a stopper 7, and a separating arm 5 interlocking with the lever 8 is placed on the outside of a magnetic disc medium 1. At this time, a magnetic head 2 is brought into contact with the magnetic disc medium 1, and start and stop operations of contact are possible. While the device is stopped, the moving lever 8 is moved and fixed in the position of a point A of the stopper 7, and the separating arm 5 is interposed between a gimbals spring 3 and the magnetic disc medium 1, and the head 2 is detached from the medium 1. By preservation due to this separating mechanism, the effect which makes the HDA long-life is attained.

Description

[Detailed description of the invention] The present invention relates to a magnetic disk device, particularly a contact start device.

Stop type head/disk assembly! J(HDA
This invention relates to a magnetic disk device using j.

Conventionally, this type of magnetic disk device starts and stops while a magnetic head (hereinafter referred to as a head) and a magnetic disk medium (hereinafter referred to as a medium) are in contact with each other. When the device is started, the air flow rises as the medium rotates, creating a buoyant force on the head, which gradually floats above the medium surface.When the medium reaches steady rotation, the head rises above the medium surface. They float up at regular intervals. From this state, the head performs predetermined operations such as reading and writing data while moving horizontally on the surface of the medium. Also, when stopping the device, the head should be moved to a predetermined position (head floating).

As the rotation of the medium decreases, the head gradually descends, and when the medium stops, it is in complete contact with the surface of the medium. However, if it is left in such a bad environment (high humidity, dust) for a long time (operation is stopped)
If the head is left in contact with the medium, condensation tends to form on the area where the head and the medium are in contact, and even if the area where the condensation has dried is dried when the equipment is returned to a usable environment when it is restarted, impurities remain.
This had a major drawback in that it could damage the head or the surface of the medium when the device was started (when the medium was rotating), leading to serious problems.

The present invention relates to a head for separating a head and a medium within an HDA in a magnetic disk device.

To provide a magnetic disk device that is equipped with a disk separation mechanism so that the head is brought into a non-contact state from the medium surface when the device is stopped (when the medium is stopped).

The magnetic disk drive according to the present invention includes a mechanical head-disk separation mechanism located between the medium and a spring (hereinafter referred to as a gimbal spring) that acts to press the head against the medium surface with appropriate pressure. When the device is stopped, the separation mechanism is slowly moved in the direction of the inner circumference of the disk medium so as to be inserted between the medium and the gimbal spring, and then moved while being in contact with the spring. The structure is such that the head can be moved away from the medium surface.

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

Referring to FIGS. 1 and 2, conventional magnetic disk media 1. Magnetic head 2. Gimbal spring 3. Head arm 4. A head separation arm 5. A pillar supporting the same unit 6. A head/disk separation mechanism is provided, which is comprised of a moving lever 8 that interlocks with the arm for moving the arm.

During operation of the apparatus, the moving lever 8 is moved and fixed to the position of point B of the stopper 7, and the separation arm 5 interlocked with the lever is positioned outside the magnetic disk medium 1. At this time, the magnetic head 2 is in contact with the magnetic disk medium l due to the pressing force of the gimbal spring 3. In this state, conventional contact start/stop operations are possible.

Next, when the device is in a stopped state, move the moving lever 8 to the stopper 7.
The separation arm 5, which moves and fixes to the A point position of
and separates the head 2 from the medium 1.

Further, in this embodiment, the head disk separation mechanism is manually moved, but for example, a drive circuit that uses wind pressure caused by the rotation of the medium in H1A, and a drive circuit that combines a sensor that detects rotation, a motor, etc. The head-disk separation mechanism may be automatically operated using the head-disk separation mechanism.

As described above, since the magnetic head can be kept out of contact with the magnetic disk medium surface while the apparatus is not operating, it is possible to eliminate the above-mentioned drawbacks.

In addition, by appropriately selecting the arm length and mounting position of this mechanism and incorporating it into the HDA, conventionally when assembling the HDA, a special jig for assembling the head (a special jig for assembling the head (to prevent the head from coming into contact with the medium) This mechanism simplifies assembly work and prevents accidents such as damage to the media surface due to vibrations that the HDA receives during transportation and movement of the device. It also has the effect of being possible.

As explained above, the present invention provides a head-disk separation mechanism in a contact start-stop type HDA so that the magnetic head can be stored in a non-contact state with respect to the magnetic disk medium, thereby having the effect of extending the life of the HDA.

[Brief explanation of the drawing]

1 and 2 are a plan view and a partial sectional view of an embodiment according to the present invention. l...Magnetic disk medium, 2...Magnetic head, 3...Gimbal spring, 4...
Rad arm to the river, 5...head disk separation arm, 6...post, 7...stopper,
Death... Lever for moving the separation arm, 9...
HDA cover.

Claims (1)

[Claims] A magnetic disk drive using a head/disk assembly of a contact start/stop type has a head/disk separation mechanism in the head/disk assembly so that the magnetic head is out of contact with the surface of the magnetic disk medium while the operation is stopped. A magnetic disk device characterized in that it is configured as follows.