JPH01122086A - Case for magnetic recording medium - Google Patents

Abstract

PURPOSE:To interrupt the influence of an external magnetic field by forming a magnetic shielding layer made of superconductors over a whole case to house a magnetic recording medium. CONSTITUTION:The whole outside surface or the inside surface of a housing case 2 to house a hard disk 1, etc., is coated with the powdered superconductors. Thus, a line of magnetic force from the outside is interrupted by a Meissner effect.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording medium storage container for storing magnetic recording media such as hard disks and floppy disks.

[Conventional technology]

In such a magnetic recording medium storage device, the storage case for storing the magnetic recording medium has conventionally been made of paper, plastic, paper, or the like.

[Problem that the invention seeks to solve]

The storage case with the conventional configuration described above does not have a shielding function against magnetic lines of force, so when the storage case is exposed to strong magnetic lines of force from the outside, the direction of magnetization recorded on the magnetic recording medium inside the storage case will change. There was a possibility that it would be reversed or erased.

An object of the present invention is to enable magnetic recording media to be stored effectively without being affected by external magnetic fields by effectively utilizing a new substance that has recently begun to attract much attention.

[Means for solving problems]

A characteristic feature of the present invention is that a magnetic shielding layer made of a superconductor is formed over the entire area of a storage case that stores a magnetic recording medium.

[For production]

In other words, when strong lines of magnetic force from the outside are emitted toward the storage case, lines of magnetic force in the opposite direction to the lines of magnetic force are generated from the superconductor, and due to the Meissner effect in which these two lines of magnetic force cancel each other out, the lines of magnetic force from the outside are accommodated. This prevents them from entering the case.

〔Effect of the invention〕

Therefore, by forming a magnetic shielding layer made of superconductor over the entire area of the storage case, strong lines of magnetic force from the outside can be completely blocked, and the direction of magnetization recorded on the magnetic recording medium can be reversed. The magnetic recording medium can now be stored satisfactorily for a long period of time without being erased or erased.

〔Example〕

FIG. 1 shows a storage case (2) that houses a hard disk (1) as a magnetic recording medium used in a fixed magnetic disk device. As shown in FIG. 2, a magnetic shielding layer (3) made by coating a powdered superconductor is formed on the entire outer surface of the storage case (2), so that lines of magnetic force from outside are prevented from entering the storage case (2). 2) It is configured to generate lines of magnetic force in a direction repelling the lines of magnetic force so that they do not enter the inside of the magnetic field.

In addition, depending on the material constituting the superconductor, the critical temperature at which the superconducting state appears may be extremely low, and in this case, the superconductor will be cooled using a cooling device such as a cryoliquefier. .

[Another example]

In the above embodiment, the magnetic shielding layer (3) is placed in the storage case (2).
Although it is formed on the outer surface of the storage case (2), it may be formed on the inner surface of the storage case (2), or the storage case (2) may be constructed of the magnetic shielding layer (3) itself.

Further, in the above embodiment, a storage case (2) for storing a hard disk (1) is shown, but reel-to-reel tape,
A storage case that stores cassette tapes and video tapes, and a storage case body (4A) that stores floppy disks (5) as shown in Figure 3, and this storage case body (4^).
The present invention can also be applied to a storage case (4) comprising a lid (4B) that is detachable from the storage case.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the magnetic recording medium storage device according to the present invention, FIG. 1 is a perspective view of the storage case, FIG. 2 is a sectional view of the main part of the storage case, and FIG. 3 is another embodiment of the storage case. It is a partially cutaway front view showing the. (1)...Magnetic recording medium, (2)...
Storage case, (3)...Magnetic shielding layer.

Claims (1)

[Claims] 1. A storage case for magnetic recording media, in which a magnetic shielding layer (3) made of a superconductor is formed over the entire area of a storage case (2) for storing a magnetic recording medium (1). 2. The magnetic recording medium storage device according to claim 1, wherein the magnetic shielding layer (3) is formed by coating the inner surface of the storage case (2) with a powdered superconductor. . 3. The magnetic recording medium storage device according to claim 1, wherein the magnetic shielding layer (3) is formed by coating the outer surface of the storage case (2) with a powdered superconductor. . 4. The magnetic recording medium storage device according to claim 1, wherein the storage case (2) is composed of the magnetic shielding layer (3) itself.