Magnetic data erase device and magnetic data erase method

A technology for deleting devices and data, which is applied in recording/reproducing/deleting methods, erasing methods, data recording, etc., can solve the problems of hard disk devices that cannot be reused, writing data takes a long time, and destroying requires labor. Savings, easy design, and the effect of reducing the output voltage

Inactive Publication Date: 2006-08-23
ORIENT INSTR COMP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, data deletion software that makes restoration of magnetic data impossible prevents restoration by writing random data or "00" data on the disk, and it takes a lot of time to write data.
In addition, in the case of mechanically destroying the hard disk device, the destruction requires labor and the hard disk device cannot be reused.
Also, there is concern about the possibility of reading data from corrupted disk fragments

Method used

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  • Magnetic data erase device and magnetic data erase method
  • Magnetic data erase device and magnetic data erase method
  • Magnetic data erase device and magnetic data erase method

Examples

Experimental program
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Effect test

no. 1 example

[0096] image 3 is an equivalent circuit diagram of the magnetic data erasing device 3 of the first embodiment, Figure 4 It is an exploded perspective view showing the internal structure of the magnetic data erasing device 3 . Figure 5 It is a perspective view showing a state where a deletion operation is performed using the magnetic data deletion device 3 . Among them, for image 3 For the magnetic data deletion device 3, since it basically has the same figure 1 The magnetic data erasing device 1 has the same circuit structure, and therefore, the same structural parts are given the same symbols and descriptions thereof are omitted. In addition, in image 3 Although the equivalent circuit diagram of FIG. 2 shows a structure having three degaussing coils 15a to 5c, only the structure having the degaussing coil 15a will be described in the magnetic data erasing device 3 of the first embodiment.

[0097] The magnetic data deletion device 3 of the first embodiment is as i...

no. 2 example

[0122] Figure 6 is an exploded perspective view of the internal structure of the magnetic data erasing device 5 of the second embodiment, Figure 7 It is a perspective view of a state where a deletion operation is performed using the magnetic data deletion device 5 . The magnetic data erasing device 5 of the second embodiment is basically the same as the equivalent circuit of the above-mentioned first embodiment (refer to image 3 )same. Therefore, the same symbols are assigned to the same structural parts and repeated explanations are omitted.

[0123] In the above first embodiment, if image 3 As shown, only one degaussing coil 15a is provided, but in the second embodiment, as the size of the object for data deletion increases, a structure in which three degaussing coils 15a to 15c are connected in parallel (refer to image 3 ). Moreover, the degaussing coils 13a-13c are provided in series with each of the degaussing coils 15a-15c.

[0124] The magnetic data deletion ...

no. 3 example

[0140] Figure 8 is an equivalent circuit diagram of the magnetic data erasing device 7 of the third embodiment. The magnetic data erasing device 7 of the third embodiment is a magnetic data erasing device dedicated to a magnetic tape, and adopts a structure in which the maximum strength of a magnetic field generated is reduced compared with the above-mentioned first embodiment. That is, in the magnetic data erasing device 7 of the third embodiment, the voltage applied to the degaussing coils 15a-15c should be reduced, and the above-mentioned image 3 The circuit structure of the two sets of charging circuits 4a and two capacitors 14 used in the equivalent circuit of the present invention, and adopts the structure of reducing the capacitance of the capacitor 14 ( Figure 8 ), however, other structures are made the same as the magnetic data erasing device 3 of the above-mentioned first embodiment (refer to Figure 3 ~ Figure 5 ).

[0141] Such as Figure 8 As shown, in the ...

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Abstract

There are provided a magnetic data erase device and method capable of completely demagnetizing a recording medium of a magnetic recording device and surely erasing magnetic data. The magnetic data erase device and method can erase magnetic data recorded in a computer having a built-in magnetic recording medium and a hard disc device as they are. The magnetic data erase device includes a power supply circuit section (2) for generating attenuation alternation voltage reducing the peak value as the time elapses, a container section for containing a magnetic recording medium, and a demagnetization coil (15). The attenuation alternation voltage generated in the power supply circuit section (2) is electrically connected to the demagnetization coil (15) so as to generate in a container section an attenuation alternation magnetic field having a magnetic flux density whose maximum value is lowered as the time elapses, thereby erasing the magnetic data in the magnetic recording medium.

Description

technical field [0001] The present invention relates to a magnetic data erasing device and a magnetic data erasing method used when erasing data stored in a storage medium of a magnetic storage device such as a hard disk device and a magnetic carrier. Background technique [0002] For a hard disk device built in a computer, even if the disk is initialized (physically formatted or logically formatted) by the OS (Operation System: Operating System), only the location information of the stored data (FAT (File Allocation Table: file allocation table)), etc., but the magnetic data stored on the disk itself cannot be deleted. Therefore, when the computer is reused or destroyed, in order to prevent the magnetic data from being read by others, it is necessary to seek a safety device that uses data deletion software to make the magnetic data irrecoverable, or mechanically destroys the hard disk device itself. [0003] However, data deletion software that makes restoration of magneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/024
CPCG11B5/0245G11B5/024G11B5/02
Inventor 伊藤智章
Owner ORIENT INSTR COMP CO LTD
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