JPS6231077A - Fixed magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent an attraction between a magnetic disk medium and a magnetic head during a stop of the device by providing a circumferential protruding band on which an end of the magnetic head is mounted to rest on one end of a magnetic head resting circumferential band on a magnetic disk medium. CONSTITUTION:When a magnetic disk device stops, a magnetic head 2 on a data area 3 is situated at a contact, activation/stop area (CSS area) 4, a magnetic disk medium 1 stops its rotation and the magnetic head 2 contacts on the CCS area 4 and stops. At this time, the magnetic head 3 is moved so as to mount on a circumferential protruding band 5 provided on one end of the CCS area 4 on the magnetic disk medium 1 and stopped with the one end of the magnetic head 3 mounted on the protruding band 5. Thereby, the attraction of the medium and the head during stopping the device is removed and the faults due to flaws, deformation or the like of the attracted head or the medium are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and particularly to a fixed magnetic disk device.

[Prior Art] Conventionally, this type of fixed magnetic disk device has been designed to keep a magnetic head stably floating above a rotating magnetic disk medium during operation by using a magnetic disk medium surface and a surface of the magnetic head facing the medium. When the device is stopped, the opposing surfaces of the magnetic disk medium and the magnetic head come to rest with their mirror surfaces in contact with each other.

[Problems to be solved] For this reason, in conventional fixed magnetic disk drives, when the device is stopped, the facing surfaces of the magnetic disk medium and the magnetic head come to rest in a state of mirror contact. When the head is attracted to the device, the magnetic disk medium and the magnetic head are separated from each other when the device is started, resulting in serious problems such as damage to the magnetic disk medium, chipping of the magnetic head, or deformation of the support spring.

[Means for Solving Problems] The present invention has been made by focusing on the above-mentioned conventional problems, and prevents the magnetic disk medium from adhering to the magnetic head when the device is stopped, and prevents the magnetic disk medium from sticking to the magnetic head when the device is started. It is an object of the present invention to provide a magnetic disk device that can be used while preventing scratches, chipping of the magnetic head, deformation of the support spring, etc.

To this end, the present invention provides a fixed magnetic disk drive in which a magnetic head comes into contact with and rests on a magnetic disk medium when the operation is stopped. The present invention provides a fixed magnetic disk device characterized in that it is provided with a circumferential protrusion band that rests on the disk.

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

FIG. 1 is a perspective view showing the state of a magnetic disk medium and a magnetic head in an embodiment of the present invention. In the figure, 1 is a magnetic disk medium, 2 is a magnetic head, 3 is a data area, 4 is a contact start/stop area (hereinafter referred to as C5S area), and 5 is a protrusion zone.

When a magnetic disk device is in operation, a magnetic disk medium 1 rotates and a magnetic helad 2 floats above a data area 3 of the magnetic disk medium 1 to record and read data. When the magnetic disk drive stops, the magnetic head 2 that was on the data area 3 is positioned in the C5S area 4, the magnetic disk medium l stops rotating, and the magnetic head 2 contacts the C8S area 4 and stops. The operation is similar to that of a conventional magnetic disk device, but in this magnetic disk device, the magnetic head 3 next rides on the circumferential projection band 5 provided at one end of the C5S area 4 on the magnetic disk medium l. The magnetic head 3 is moved as far as possible and comes to rest with one end of the magnetic heald 3 riding on the protruding band 5. When starting up the magnetic disk device, the magnetic helad 3 first rides on the protruding band 5 and is returned to the C5S area 4. In this state, the magnetic disk medium l rotates as in the conventional magnetic disk device, and the magnetic helad 2 floats. It is then first moved to the data area 3 and operated to record and read data.

FIG. 2 is a sectional view of the magnetic disk medium and magnetic head when the apparatus is stopped in the embodiment described in FIG. 1. As you can see in this figure, the magnetic herad 3 is the magnetic disk medium 1.
It rests in a state where it rides on the protruding band 5. For this reason, in the conventional magnetic disk drive, the magnetic head 3 rests in the C5S area 4, and the magnetic disk medium l and the head come into contact with each other with mirror surfaces, but according to the present invention, there is no mirror surface contact.
Trouble caused by adsorption can be avoided.

Above, we have described the case where data is read and written using one head per side of the magnetic disk medium 1, and the C3S area 4 of that head is located on the outer circumferential side of the data area. Even when using multiple magnetic heads, or when the C5S area 4 is located on the inner circumferential side of the data area 3, a circumferential protruding band is provided at one end of the CSS area of each magnetic head, and the It can be constructed so that one end rides on the protruding band and rests thereon.

[Effects of the Invention] As explained above, the present invention provides a fixed magnetic disk drive in which the magnetic head comes into contact with the magnetic disk medium and rests when the operation is stopped, in which a circumferential band for resting the magnetic head on the magnetic disk medium is fixed. The fixed magnetic disk device is characterized by having a circumferential protruding band on one end of the magnetic head, on which one end of the magnetic head rests, so that when the device is stopped, one end of the head rests on the protruding band and comes to rest. This operation has the effect of removing adhesion between the medium and the head, and preventing damage or deformation of the medium or head due to adsorption.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the state of a magnetic disk medium and a magnetic head in one embodiment of the present invention, and FIG.
FIG. 2 is a cross-sectional view showing the state of the magnetic disk medium and magnetic head when the apparatus of the illustrated embodiment is stopped; 1: Magnetic disk medium 2: Magnetic head 3: Data area 4: C5S area 5: Projection band

Claims (1)

[Claims] In a fixed magnetic disk device in which the magnetic head comes to rest by touching the magnetic disk medium when the operation is stopped, one end of the magnetic head rests on one end of the circumferential band for resting the magnetic head on the magnetic disk medium and comes to rest. What is claimed is: 1. A fixed magnetic disk device characterized by being provided with a protruding band.