JPS6325522Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a disk pack information erasing tool that easily erases unnecessary information stored on the information disk of a disk pack.

(b) Background of the technology In recent years, as a method of writing information as densely as possible on an information disk that forms a recording medium, a method has been adopted in which a magnetic head is brought as close as possible to the information disk, that is, a method of reducing the flying height of the magnetic head. It's starting to look like this. However, with this type of system, accidents often occur in which the magnetic head comes into contact with the recording medium, which damages the recording medium and makes the information disk unusable. A disk pack in which a large number of layers are stacked is itself a defective product.

(c) Conventional technology and problems Conventionally, defective disk packs like this one store information that you do not want a third party to know. However, when the recording medium is damaged in this way, it is difficult to carry out this erasing instruction on the information disk. Therefore, the data can be easily stored on the information disk using a simple device. There is a desire for something that erases unnecessary information.

(d) Purpose of the invention This invention was made in view of the above points.
It is an object of the present invention to provide an information erasing tool for a disk pack having a simple structure so that unnecessary information stored on the information disk can be easily erased.

(e) Structure of the invention In order to achieve the above object, the disk pack information erasing tool of the present invention is a device that is inserted vertically between the information disks of the disk pack on a support that rotates at a predetermined angle. A plurality of arms are installed in the same dimension, and the arm is buried so that at least one or more permanent magnets pass through the arm in the vertical direction, and the adjacent permanent magnets have mutually changed magnetic poles. It is characterized by:

(f) Embodiment of the invention An embodiment of the disk pack information erasing tool of the invention will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic diagram of the disk pack information erasing device according to the present invention, FIGS. 2A and 2B are a sectional view and a plan view of an arm used in the device, and FIG. The figure is a schematic diagram of a package checker for erasing information from a disk pack, and FIG. 4 is a plan view of the main part of the package checker.

First, the information erasing tool for the disk pack of the present invention shown in FIG. A floor plate member 3 is provided.
A protruding square member 4 is provided on the side surface of the floor plate member 3, and the square member 4 is provided with an iron support 6 having a rotating shaft 5 made of Teflon inside.
A rectangular prism-shaped arm 7 is installed on this pillar 6 and extends perpendicularly to the pillar. As shown in FIGS. 2A and 2B, this arm has a shape in which disk-shaped permanent magnets 8 pass through the arm in the vertical direction so that adjacent magnets have different polarities. It is buried in This arm is adapted to rotate at a predetermined angle parallel to the floorboard, and is adapted to be inserted between each information disk of the disk pack.

The third section describes the procedure for erasing unnecessary information stored on the information disk of a disk pack using the disk pack information erasing tool of the present invention.
This will be explained using the diagram and FIG.

First, the floor plate 3 of the erasing tool shown in FIG. 1 is inserted along the guide rail 2 of the package checker shown in FIG. 3. A stopper is provided inside the floor plate 3, so that it stops when inserted to a predetermined position. Then, as shown in FIG. 4, the arm 7 in which the permanent magnet is embedded is inserted between the stacked information discs in the disk pack 11 as indicated by the dotted line 7. Then, rotate this disk pack 11 by hand two or three times in the direction of the arrow. Then, the recorded information stored on the information disk disappears due to the magnetic flux of the permanent magnet embedded in this arm. Here, it is sufficient that the arm 7 is inserted between the information disks to a point where the recording medium provided on the information disk is present.

(g) Effects of the invention As described above, the disk pack erasing tool of the present invention has the advantage that unnecessary information can be erased in a short time with a simple device.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an information erasing device for a disk pack according to the present invention, FIGS. 2A and 2B are a sectional view and a plan view of an arm used in the device,
FIG. 3 is a schematic diagram of the package checker, and FIG. 4 is a plan view of the main part of the package checker. In the figure, 1 is the frame, 2 is the guide rail, and 3
1 is a floor plate member, 4 is a square member, 5 is a rotating shaft, 6 is a column, 7 is an arm, 8 is a permanent magnet, 11 is a disk pack, and 12 is a pack checker.

Claims (1)

[Scope of utility model registration request] A plurality of arms are installed vertically on a column that rotates at a predetermined angle and are sized to be inserted between the information discs of the disk pack, and at least one permanent magnet passes through the arms in the vertical direction. An information erasing tool for a disk pack, characterized in that the adjacent permanent magnets are buried in such a manner that their magnetic poles are changed from each other.