JP2007080483A - Data erasing device, and data erasing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain development of a data erasing device which can erase thoroughly data, and the like. <P>SOLUTION: The data erasing device 1 is constituted of an outer box section 2, a destruction chamber 3, and a containing section 5. The interior of the destruction chamber 3 is hollow, and a supporting portion 10 is provided at the innermost position. An exciting coil (magnetic field generating means) 12 is fixed to the periphery of the destruction chamber 3. The containing section 5 is supported by the opening 6 of the destruction chamber 3 and the supporting portion 10 provided on the inner wall 11. Under that state, a damping AC magnetic field is generated in the destruction chamber 3 by the exciting coil 12. Since an iron piece 31 is fixed to the bottom of the containing section 5, the iron piece 31 reacts to the magnetic field and receives a force to move the containing section 5 entirely to the opening 6 side where the containing section 5 takes an inclining attitude. During the first time excitation process, data in a hard disk 68 is erased and the attitude of the hard disk 68 is varied. Subsequently, a second time excitation process is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data erasing apparatus and a data erasing method for erasing recorded data from a data recording medium such as a hard disk, a floppy disk (registered trademark), a video tape, and a magneto-optical disk (MO).

  The hard disk device built in the computer only erases the location information (FAT: File Allocation Table) of the recorded data even if the magnetic disk is initialized (physical format and logical format) by the OS (Operating System). Thus, the magnetic data itself recorded on the magnetic disk is not erased. For this reason, when reusing or destroying a computer, it is impossible to restore the magnetic data using data erasure software, etc., or to prevent the hard disk device itself from being Security measures such as destruction are taken.

  However, data erasure software that makes it impossible to restore magnetic data is to prevent restoration by overwriting random data or “00” data on the magnetic disk, and it takes a long time to overwrite the data. Further, when mechanically destroying a hard disk device, it takes time and effort to destroy the hard disk device and cannot be reused. Moreover, there is a possibility that data can be read from a broken piece of the magnetic disk.

  Therefore, a data erasing device has been developed that erases magnetic data in a short time without overwriting data or destroying the hard disk device. For example, Patent Document 1 discloses a recorded data erasing apparatus that disturbs magnetic data recorded on a magnetic disk by applying a magnetic field from the outside of the hard disk device and makes it impossible to restore the recorded magnetic data. Yes.

  The data erasing device disclosed in Patent Document 1 has a case portion around which a coil is wound. Then, the hard disk device is inserted into the case portion, and the coil is energized to generate a magnetic field in the case portion. In the hard disk device, the magnetic data recorded by the magnetic field generated by the coil is disturbed, and the recorded data is erased.

  In the data erasing apparatus disclosed in Patent Document 2, a plurality of coils are arranged side by side, and a voltage is applied in order to erase magnetic data in order of the front part, the center part, and the rear part. This data erasing apparatus generates a magnetic field in a range exceeding 2500 Oersted and erases magnetic data with this magnetic field.

According to the data erasing apparatus disclosed in these patent documents, the recorded magnetic data can be erased in a short time only by inserting the hard disk device and performing the data erasing operation.
Therefore, the hard disk device from which the data has been erased can be discarded as it is, or it can be mounted on the computer again and reused.
In the data erasing devices disclosed in these patent documents, the hard disk device is stationary during the process, and the posture does not change.
Utility Model Registration No. 3088608 JP 2005-78713 A

According to the data erasing apparatus disclosed in Patent Document 1, the magnetic data recorded as described above is disturbed, and the recorded data is erased. Therefore, data cannot be read by general means.
However, for highly confidential and important information that is evidence of national secrets and criminal cases, information can be read out using all possible means. Therefore, these extremely important information should be treated so that they cannot be read more completely.

From this point of view, the data erasing apparatus disclosed in the above-mentioned patent document cannot be said to be completely erased.
In other words, in the data erasing apparatus disclosed in the above-mentioned patent document, a situation may occur in which magnetism does not reach a part of the magnetic disk behind some member. Therefore, there is a concern that a part of the recorded data remains.
For example, when erasing magnetic data recorded on a hard disk, if a magnetic field is applied in the radial direction of the magnetic disk provided inside, sufficient magnetic force cannot be applied to the rear part of the rotating shaft, and the magnetic data is partially It is possible to remain.
Even if some magnetic data remains, it is impossible to extract only this by a normal method, and there is no concern that the data is read out. However, if the information is at the national secret level as described above, data can be read out with extremely advanced knowledge and devices. For this reason, it is necessary to avoid leaving data even in a part of the disk.

  Accordingly, the present invention focuses on the above-described problems of the prior art, and an object of the present invention is to develop a data erasing apparatus that can erase data more completely.

  The invention described in claim 1 for solving the above-described problem is a data erasing apparatus for erasing data recorded on a data recording medium, and a magnetic field generating means for generating a magnetic field, or a predetermined frequency. And either or both of electromagnetic wave generating means for generating an electromagnetic wave of a predetermined intensity, and the attitude of the data recording medium relative to either or both of the magnetic field generating means and the electromagnetic wave generating means can be changed relatively This is a data erasing device.

A data erasing apparatus of the present invention is for erasing data recorded on a data recording medium, and includes a magnetic field generating means for generating a magnetic field or an electromagnetic wave generating means for generating an electromagnetic wave having a predetermined frequency and a predetermined intensity. Either one or both are provided. The data erasing apparatus of the present invention can change the orientation of the data recording medium relative to one or both of the magnetic field generating means and the electromagnetic wave generating means. Therefore, even if there is a shadow part when processing in the basic posture, the shadow state is resolved by changing the posture of the data recording medium relative to the magnetic field generating means or the electromagnetic wave generating means. The data in the area is erased.
Examples of the configuration for changing the attitude of the data recording medium relative to the magnetic field generating means or the electromagnetic wave generating means include a configuration for changing the attitude of the data recording medium itself, a configuration for changing the attitude of the magnetic field generating means or the electromagnetic wave generating means, In addition, there is a configuration in which the postures of both the data recording medium and the magnetic field generating means or the electromagnetic wave generating means are changed.
A typical example of the data recording medium referred to in the present invention is a hard disk device. A hard disk device refers to a device incorporating a solid magnetic disk for recording magnetic data. The concept of the data recording medium also includes a small or large magnetic tape used in a general-purpose computer or a video tape used in a general home. Further, the entire device in which the hard disk device is incorporated can be processed by the data erasing device of the present invention. That is, it can be processed by the data erasing apparatus of the present invention in a state of being incorporated in a computer apparatus or the like without removing the hard disk.

  The invention according to claim 2 is the data erasing apparatus according to claim 1, wherein at least the attitude of the data recording medium itself can be changed.

  In the data erasing apparatus of the present invention, the shadow state in the basic attitude is eliminated by changing the attitude of the data recording medium itself, and the data in all areas is erased. In the present invention, a configuration in which the attitude of the magnetic field generating means or the electromagnetic wave generating means is changed at the same time can be employed.

  According to a third aspect of the present invention, there is provided a destruction chamber exposed to the magnetic field generated by the magnetic field generation means or the electromagnetic waves generated by the electromagnetic wave generation means, and the data recording medium itself or the data recording medium provided in the destruction chamber. A support unit that supports the storage unit, and any one of the support unit, the data recording medium itself, and the storage unit is movable, and the support by the support unit is released by moving these. The data erasing apparatus according to claim 2, wherein the data erasing apparatus is a data erasing apparatus.

In the data erasing apparatus of the present invention, the destruction chamber is provided with a support portion for supporting the data recording medium itself or the storage portion, and when the data recording medium is in a basic posture, the data recording medium itself is supported by the support portion. ing.
In the present invention, any one of the support unit, the data recording medium itself, and the storage unit can be moved, and the support of the support unit is released by moving these. Therefore, the balance of the data recording medium or the like is lost, and the attitude of the data recording medium changes.

  According to a fourth aspect of the present invention, there is provided a destruction chamber exposed to the magnetic field generated by the magnetic field generation means or the electromagnetic waves generated by the electromagnetic wave generation means, and the data recording medium itself or the data recording medium provided in the destruction chamber. A support portion capable of supporting the storage portion, and any one of the support portion, the data recording medium itself, and the storage portion is movable, and the support by the support portion is released by moving these. The data erasing apparatus according to claim 2, wherein the data erasing apparatus changes to a supported state.

  The data erasing apparatus of the present invention performs an operation opposite to that of the data erasing apparatus according to claim 2 described above, and any one of the support unit, the data recording medium itself, and the storage unit is moved to move the support unit. It is characterized by changing from a state in which the support by is released to a state in which it is supported. For this reason, the balance of the data recording medium or the like changes, and the attitude of the data recording medium or the like changes.

  According to a fifth aspect of the present invention, there is provided a destruction chamber exposed to the magnetic field generated by the magnetic field generation means or the electromagnetic waves generated by the electromagnetic wave generation means, and the data recording medium itself or the data recording medium provided in the destruction chamber. A support unit that supports the storage unit, and any one of the support unit, the data recording medium itself, and the storage unit is movable, and the data recording medium itself or the data recording medium is stored by moving these. The data erasing apparatus according to claim 2, wherein a support balance of the storage unit changes.

The erasing apparatus of the present invention also includes a support unit that supports the data recording medium itself or the storage unit in the destruction chamber, and when the data recording medium is in a basic posture, the data recording medium and the like are balanced by the support unit. Is supported.
In the present invention, any one of the support unit, the data recording medium itself, and the storage unit can be moved, and the support balance of the data recording medium itself or the storage unit is changed by moving these. For this reason, the balance of the data recording medium or the like is lost, and the attitude of the data recording medium or the like changes.

  According to a sixth aspect of the present invention, at least a magnetic field generation unit is provided, and any one of the support unit, the data recording medium itself, and the storage unit is movable by an action of a magnetic field generated by the magnetic field generation unit. 6. A data erasing device according to claim 3, wherein the data erasing device is a data erasing device.

  The data erasing apparatus of the present invention has a simple structure because the support portion and the like move by the action of the magnetic field generated by the magnetic field generating means.

The data erasing apparatus of the present invention described above changes at least the attitude of the data recording medium itself. On the other hand, the attitude of the magnetic field generating means or the electromagnetic wave generating means may be changed.
The invention according to claim 7 is the data erasing apparatus according to claim 1, wherein the attitude of at least one of or both of the magnetic field generating means and the electromagnetic wave generating means can be changed.

  In the data erasing apparatus of the present invention, the shadow state in the basic posture is eliminated by changing the posture of either one or both of the magnetic field generating means and the electromagnetic wave generating means, and the data in all areas are erased. In the present invention, a configuration in which the attitude of the data recording medium itself is simultaneously changed can be employed.

  The invention according to claim 8 is provided with a destruction chamber exposed to a magnetic field generated by the magnetic field generation means or an electromagnetic wave generated by the electromagnetic wave generation means while accommodating a data recording medium, and the destruction chamber swings. 8. The data erasing apparatus according to claim 7, wherein the attitude of one or both of the magnetic field generating means and the electromagnetic wave generating means is changed.

  The data erasing apparatus of the present invention includes a destruction chamber that accommodates a data recording medium and is exposed to a magnetic field generated by the magnetic field generation means or an electromagnetic wave generated by the electromagnetic wave generation means, and the destruction chamber swings. As a result, the posture of one or both of the magnetic field generating means and the electromagnetic wave generating means changes. The data erasing apparatus of the present invention has a simple structure because the attitude of the magnetic field generating means or the electromagnetic wave generating means is changed by swinging the destruction chamber.

  According to the ninth aspect of the present invention, the data erasing process is performed during the data erasing process by either one or both of the magnetic field generating means and the electromagnetic wave generating means, or by one or both of the magnetic field generating means and the electromagnetic wave generating means. 9. The data recording medium itself or the attitude of one or both of the magnetic field generating means and the electromagnetic wave generating means can be changed during the plurality of times during the process. A data erasing apparatus according to any one of the above.

  In the data erasing apparatus of the present invention, the data erasing process is performed before and after the attitude change. For this reason, magnetic fields and electromagnetic waves are distributed over the shaded portion in the basic posture, and data is erased over the entire area.

  The invention according to claim 10 further includes an inner case for accommodating the data recording medium and an outer case for accommodating the inner case, and the inner case is supported by the outer case so as to be swingable. The data erasing apparatus according to claim 2, wherein the data erasing apparatus is a data erasing apparatus.

  The outer case includes an inner case support portion that supports the inner case in a swingable manner, and a placement portion that can place and support one end of the inner case to hold the inner case in a substantially horizontal state. A configuration can be adopted (claim 11).

  Furthermore, at least an exciting coil is provided as a magnetic field generating means, and the exciting coil can generate a magnetic field in a direction from the inner case support portion to the mounting portion, and is in a direction opposite to a positive voltage with respect to the exciting coil. It is also possible to adopt a configuration in which switching means capable of sequentially switching and applying these voltages is further provided (claim 12).

  The invention according to claim 13 is used in a state where the data recording medium accommodated in the inner case is movable along the bottom surface of the inner case. The data erasing apparatus described.

  According to the data erasing apparatus of the present invention, the data recording medium can be moved in the inner case, and the shadow state is more reliably eliminated.

  In the invention described in claim 14, the inner surface of the outer case and the outer surface of the outer case are opposed to each other, and a cushioning material is provided on a part or all of at least one of the inner surface and the outer surface. A data erasing apparatus according to claim 10, wherein:

  According to the data erasing apparatus of the present invention, even if the inner case and the outer case collide during or after the inner case is swung, the impact is reduced.

  According to a fifteenth aspect of the present invention, the switching means includes a first magnetic field generating process for applying a voltage in the positive direction, a second magnetic field generating process for applying a voltage in the reverse direction, and a third applying a voltage in the positive direction. 15. The data erasing apparatus according to claim 10, wherein the magnetic field generation processing can be sequentially executed.

  According to the data erasing apparatus of the present invention, the shadow state is more reliably eliminated.

  In all of the data erasing devices of the present invention described above, at least an inner case for accommodating a data recording medium is provided, and a buffer member that can be fitted between the inner case and the data recording medium accommodated in the inner case is further provided. (Claim 16).

  The invention according to claim 17 is a data erasing method for erasing data recorded on a data recording medium, wherein a magnetic field generating means for generating a magnetic field or an electromagnetic wave having a predetermined frequency and a predetermined intensity is generated. Using either one or both of the electromagnetic wave generating means, the data recording medium is placed in a magnetic field or a plurality of postures in which the posture of the data recording medium relative to either or both of the magnetic field generating means and the electromagnetic wave generating means is relatively different. A data erasing method characterized by exposure to electromagnetic waves.

  The data erasing method of the present invention is for erasing data recorded on a data recording medium, and is either a magnetic field generating means for generating a magnetic field or an electromagnetic wave generating means for generating an electromagnetic wave having a predetermined frequency and a predetermined intensity. Use one or both. In the data erasing method of the present invention, the data recording medium is exposed to the magnetic field or the electromagnetic wave in a plurality of postures in which the posture of the data recording medium is relatively different with respect to one or both of the magnetic field generating means and the electromagnetic wave generating means. According to the data erasing method of the present invention, data erasure processing is performed in a plurality of postures. Therefore, even if there is a shadow portion when processing is performed in one posture, the shadow state is eliminated and all regions are deleted. Data is deleted.

  The invention according to claim 18 is the data erasing method according to claim 17, characterized in that at least the attitude of the data recording medium itself is changed.

  In the data erasing method of the present invention, the shadow state is eliminated by changing the attitude of the data recording medium itself, and the data in all areas are erased.

  According to a nineteenth aspect of the present invention, there is provided the data erasing method according to the seventeenth aspect, wherein the posture of at least one of or both the magnetic field generating means and the electromagnetic wave generating means is changed.

  In the data erasing method of the present invention, the shadow state is eliminated by changing the attitude of the magnetic field generating means or the electromagnetic wave generating means, and the data in all areas are erased.

  According to the twentieth aspect of the present invention, during the data erasing process by one or both of the magnetic field generating means and the electromagnetic wave generating means, or the data erasing process by either one or both of the magnetic field generating means and the electromagnetic wave generating means. 20. The method according to claim 17, wherein a plurality of times are executed, and the attitude of the data recording medium itself or the attitude of one or both of the magnetic field generating means and the electromagnetic wave generating means is changed during that time. This is a data erasing method.

  In the data erasing method of the present invention, the data erasing process is performed before and after the attitude change. Even if there is a shadow part when processing in one posture, a magnetic field or electromagnetic wave spreads and data is erased over the entire area.

  According to the data erasing apparatus of the present invention, data in all areas of the data recording medium is erased. Therefore, if data is erased using the data erasing apparatus of the present invention, the data is not restored by any method.

  The same applies to the data erasing method of the present invention, and data in all areas of the data recording medium is erased.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a perspective view of a data erasing apparatus according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view of the data erasing apparatus of FIG. FIG. 3 is a cross-sectional view of the data erasing apparatus of FIG. 1, showing a state in which the internal hard disk device is in a basic posture. 4 is a cross-sectional view of the data erasing apparatus of FIG. 1, showing a state in which the internal hard disk device is in the second posture.

  The data erasing apparatus 1 according to the first embodiment includes an outer box part 2, a destruction chamber 3, and a storage part 5.

The destruction chamber 3 is a rectangular box made of a non-magnetic material such as resin, and only one surface on the front side is open. However, the size of the opening 6 is not the entire front part, but a front wall 8 is left slightly below the front part.
Although the inside of the destruction chamber 3 is hollow, the support part 10 is provided in the innermost position with respect to the opening 6 as shown in FIGS. The support portion 10 is provided only on the back wall 11 among the walls constituting the destruction chamber 3. The support portion 10 is continuous over the entire width of the back wall 11. The height of the upper end of the support portion 10 is equal to the height of the lower end of the opening 6 described above.

  An excitation coil (magnetic field generating means) 12 is wound around the destruction chamber 3. A magnetron (electromagnetic wave generating means) 13 is attached to a part of the destruction chamber 3. The magnetron 13 has a function of destroying the optical recording medium, and generates an electromagnetic wave having a predetermined intensity from the antenna. The magnetron 13 generates a microwave having a frequency of about 4.3 GHz and a wavelength of about 7 cm, for example.

Next, the storage unit 5 will be described. The storage part 5 has a shape like a deep drawer as shown in FIG. That is, the storage unit 5 has a box shape in which only the top surface is opened. The storage unit 5 can store the hard disk device 68 in an upright state as will be described later. Accordingly, the storage unit 5 includes a front wall 20, a back wall 21, a bottom wall 22, and left and right side walls 23, 24 as shown in FIG. As shown in the figure, the side walls 23 and 24 are the largest, and then the bottom wall 22 is the largest.
A handle 30 is provided on the front wall 20 of the storage unit 5. An iron piece 31 is attached to the bottom wall 22 of the storage unit 5.

  The width of the storage portion 5 is substantially equal to the inner surface of the destruction chamber 3 as shown in FIG. 2, but the height is lower than that of the destruction chamber 3. That is, the height of the storage portion 5 is substantially equal to the opening 6 provided in the destruction chamber 3.

  The storage unit 5 is inserted into the destruction chamber 3 as shown in FIG. The storage unit 5 is supported by an opening 6 provided on the front side of the destruction chamber 3 and a support unit 10 provided on the back wall 11. That is, the bottom wall 22 of the storage portion 5 is in contact with the end face of the opening 6 provided on the front side, and the support portion 10 provided on the back wall 11, as if supported at both ends. It becomes a support state.

  The outer box portion 2 simply covers the outside of the destruction chamber 3.

  Next, the electric circuit of the data erasing apparatus 1 will be described. FIG. 5 is a basic circuit diagram of the data erasing apparatus shown in FIG. FIG. 6 is a graph showing the strength of the magnetic field generated by the data erasing apparatus shown in FIG.

As shown in FIG. 5, the data erasing apparatus 1 is roughly configured to include a magnetic field generation unit 35, an electromagnetic wave generation unit (microwave generation unit) 36, a control unit 50, and a power transformer 34 that supplies AC power to these units. Is done.
As shown in FIG. 5, the power transformer 34 receives a commercial power supply (AC 100V) and generates an AC voltage necessary for each part. The power transformer 34 is connected to the primary winding 40 and the magnetic field generator 35 connected to the AC 100V side. Secondary winding 41, secondary windings 46 and 47 connected to the electromagnetic wave generation unit 36, and a secondary winding 48 connected to the control unit 50.

  In the apparatus of FIG. 5, the magnetic field generator 35 has a function of generating a damped alternating magnetic field as shown in FIG. 6 by discharging the charge charged in the capacitor 51 through the exciting coil 12. In the magnetic field generator 35, the secondary winding 41 of the power transformer 34 is connected to the bridge diode 52, and the rectified output of the bridge diode 52 is connected to the capacitor 51 via the charging contact 53. Further, both ends of the capacitor 51 are configured to be connected to a series circuit of the reactor 56, the exciting coil 12 and the exciting contact 57 via the polarity reversing unit 55.

  In this embodiment, a polar electrolytic capacitor is used for the capacitor 51. The reactor 56 provided in series with the exciting coil (magnetic field generating means) 12 has a function of stabilizing the energization current to the exciting coil 12. The polarity reversing unit 55 includes contacts 55a and 55b that are interlocked and switched, and has a function of reversing the direction of the current flowing from the capacitor 51 to the exciting coil 12 by switching and connecting the contacts 55a and 55b.

  The magnetic field generator 35 generates a damped alternating magnetic field by the following operation. First, with the excitation contact 57 opened, the charging contact 53 is closed to charge the capacitor 51. Charging is performed until the charging voltage of the capacitor 51 reaches the peak value of the voltage that is full-wave rectified by the bridge diode 52. The time required for charging is determined according to the capacity of the capacitor 51 and the winding resistance of the secondary winding 41 of the power transformer 34.

  When the charging of the capacitor 51 is completed, the charging contact 53 is opened. At this time, the capacitor 51 is fully charged, and the terminal voltage is substantially equal to the peak value of the voltage that has been full-wave rectified by the bridge diode 52. Next, when the exciting contact 57 is closed, the electric charge charged in the capacitor 51 is rapidly discharged through the exciting coil 12. Here, the capacitor 51 and the exciting coil 12 are connected in series to form a series resonance circuit. Therefore, when the excitation contact 57 is closed, a damped alternating current i whose peak value decreases with the passage of time flows through the excitation coil 12 as shown in FIG.

  The period of the damped alternating current i flowing through the exciting coil 12 is generally determined by the capacitance of the capacitor 51 and the inductance of the exciting coil 12. The attenuation rate of the damped alternating current i is determined by the internal resistance of the capacitor 51 and the resistance component of the exciting coil 12. That is, when the excitation contact 57 is closed, as shown in FIG. 6, a decaying alternating current i having a period and an attenuation rate determined by the series resonance circuit of the capacitor 51 and the exciting coil 12 is passed through the exciting coil 12, and the current flowing has a polarity. Attenuates while inverting and reaches zero.

  Therefore, when the excitation contact 57 is closed, a damped alternating magnetic field is generated around the excitation coil (magnetic field generating means) 12 so that the magnetic flux density gradually decreases while the magnetic poles are alternately reversed over time. The magnetic field generator 35 generates a damped alternating magnetic field based on such a principle, and the data erasing apparatus 1 erases magnetic data recorded on the magnetic data recording medium using the generated damped alternating magnetic field. Is. That is, the magnetic field generating unit 35 of the data erasing apparatus 1 of the present embodiment does not generate a strong magnetic field for a long time, but a circuit having a function of generating a damped alternating magnetic field in which the magnetic flux density decreases with time. It is.

  Next, the electromagnetic wave generator 36 will be described. The electromagnetic wave generator 36 generates an electromagnetic wave by the following operation. First, the heater energizing contact 60 is closed to heat the cathode (heater) 61 of the magnetron (electromagnetic wave generating means) 13. As a result, the magnetron 13 is in a state in which thermionic electrons can be emitted from the cathode 61. Next, when the anode energizing contact 65 is closed, the rectified output voltage of the voltage doubler rectifier circuit 62 is applied to the anode 63 of the magnetron 13, and the magnetron 13 starts oscillating and radiates an electromagnetic wave having a predetermined intensity from the antenna 66. In the present embodiment, the magnetron 13 having an oscillation frequency of approximately 4.3 GHz is used, and the electromagnetic wave radiated from the antenna 66 is a microwave having a frequency of approximately 4.3 GHz and a wavelength of approximately 7 cm.

  The electromagnetic wave generator 36 generates microwaves with such a circuit configuration, and has a function of destroying recorded data by applying the generated electromagnetic waves to an optical recording medium. In this embodiment, the magnetron 13 with an oscillation frequency of about 4.3 GHz is used, but a magnetron 13 with an oscillation frequency of about 2.45 GHz can also be used.

Next, the operation of the data erasing apparatus 1 according to the present embodiment will be described along the usage procedure of the data erasing apparatus 1.
FIG. 7 is a flowchart showing an operation procedure of the data erasing apparatus shown in FIG.
The data erasing apparatus 1 of this embodiment mainly erases data in a hard disk device. During processing, the hard disk device 68 is removed from the computer or the like. On the other hand, the storage unit 5 is extracted from the destruction chamber 3 of the data erasing apparatus 1. Then, as shown in FIG. 2, the hard disk device 68 is put in the storage unit 5. Then, the accommodating portion 5 is inserted into the destruction chamber 3. The posture of the storage unit 5 at this time is a basic posture as shown in FIG. 3, and the storage unit 5 is formed by an opening 6 provided on the front side of the destruction chamber 3 and a support unit 10 provided on the back wall 11. Supported. That is, both ends of the storage unit 5 are supported to maintain a horizontal posture.

  In this state, the magnetic field generation unit 35 is made to function, and an exciting alternating magnetic field is generated in the destruction chamber 3 by the excitation coil (magnetic field generation means) 12. At the same time, microwaves are irradiated from the magnetron (electromagnetic wave generation means) 13 into the destruction chamber 3. (Step 1).

  Here, in this embodiment, since the iron piece 31 is attached to the bottom part of the accommodating part 5, the iron piece 31 receives force and moves in response to the magnetic field generated by the exciting coil 12, and the accommodating part 5 is entirely moved. Move to the opening 6 side. As a result, the storage unit 5 leaves the support unit 10 provided on the back wall 11. Therefore, the storage part 5 loses one support, the balance is lost, and the part on the back wall 11 side falls. As a result, the accommodating portion 5 is entirely inclined as shown in FIG. In addition, it is recommended that the inclination posture at this time is about 30 to 60 degrees.

  By the first excitation process in step 1, the data in the hard disk device 68 is erased, and the attitude of the hard disk device 68 changes.

When the first excitation process in step 1 is completed, the data erasing process is once stopped (step 2).
Subsequently, the second excitation process is executed (step 3). In the second excitation process, the magnetic field generator 35 is caused to function, and the exciting coil 12 generates a damped alternating magnetic field in the destruction chamber 3. At the same time, microwaves are irradiated from the magnetron 13 into the destruction chamber 3. Will be erased again. However, in the second excitation process, the attitude of the hard disk device 68 is different from that in the first excitation process. And the microwaves go around. For this reason, all data in the hard disk device 68 is erased without omission.

  In the above-described embodiment, the housing portion 5 is moved to disengage the support portion 10 and the posture of the housing portion 5 is changed. That is, the relationship between the support portion 10 and the housing portion 5 is that the housing portion 5 cannot maintain a predetermined posture unless supported by the support portion 10, and the housing portion 5 is moved to engage with the support portion 10. By unraveling, the posture of the accommodating portion 5 was changed. On the other hand, you may cancel | release engagement of both by moving the support part 10 side conversely.

FIG. 8 is a cross-sectional view of the data erasing apparatus according to the second embodiment of the present invention, in which the support portion 10 side is moved in the direction of the arrow to release the engagement with the accommodating portion 5.
In the embodiment shown in FIG. 8, the support unit 10 moves to the back wall 11 side in response to the magnetic field generated by the excitation coil 12.

  FIG. 9 is a cross-sectional view of the data erasing apparatus according to the third embodiment of the present invention, showing a state in which the internal hard disk device is in a basic posture. FIG. 10 is a cross-sectional view of the data erasing apparatus of FIG. 9, showing a state in which the internal hard disk device is in the second posture.

  The data erasing device 70 of the present embodiment is configured by the outer box part 2, the destruction chamber 71 and the storage part 72 as in the previous embodiment. The outer box is the same as in the previous embodiment.

  The destruction chamber 71 is a rectangular box made of a non-magnetic material as in the previous embodiment, and only one surface on the front side is open. An excitation coil 12 and a magnetron 13 are attached around the destruction chamber 71 as in the previous embodiment. The configuration, function, and circuit of the exciting coil 12 and the magnetron 13 are the same as in the previous embodiment.

The storage portion 72 employed in the present embodiment is attached inside the destruction chamber 71. That is, the storage portion 72 has a plate shape, and its central portion is pivotally supported by the destruction chamber 71 as shown in FIG. Therefore, the storage portion 72 swings around the shaft 75 as if it is a seesaw.
A sphere (supporting portion) 76 made of a magnetic material is provided at the lower portion of the storage portion 72. The diameter D of the sphere (support portion) 76 is smaller than the height H from the bottom of the destruction chamber 71 to the shaft 75. Therefore, the sphere (support portion) 76 can freely roll on the bottom of the destruction chamber 71.

Next, the operation of the data erasing apparatus 70 according to the present embodiment will be described along the procedure for using the data erasing apparatus 70.
The data erasing apparatus of this embodiment also erases data in the hard disk device 68, and the hard disk device 68 is removed from the computer or the like during processing and inserted into the destruction chamber 71 as shown in FIG. That is, the hard disk device 68 is placed in the storage portion 72 provided in the destruction chamber 71.
At this time, the sphere (support portion) 76 is on the rear wall 11 side of the destruction chamber 71. The hard disk device 68 is inclined with the back wall 11 side facing up. Therefore, the sphere (support portion) 76 is separated from the storage portion 72, and the sphere (support portion) 76 does not support the storage portion 72.

  In this state, the magnetic field generator 35 is caused to function so that the exciting coil 12 generates a damped alternating magnetic field in the destruction chamber 3 and at the same time, a microwave is irradiated from the magnetron 13 into the destruction chamber 3 (step 1).

Here, in the present embodiment, since the sphere (support portion) 76 is made of a magnetic material, the sphere 76 moves toward a predetermined position in response to the magnetic field generated by the excitation coil 12.
As a result, the sphere (support portion) 76 interrupts between the bottom of the destruction chamber 71 and the storage portion 72, and the sphere 76 supports the storage portion 72, changing the posture of the storage portion 72 as shown in FIG. Let
When the first excitation process is completed, the data erasing process is temporarily stopped, and then the second excitation process is executed. In the second excitation process, the attitude of the hard disk device 68 is different from that in the first excitation process. The waves go around. For this reason, all data in the hard disk device 68 is erased without omission.

In the above-described embodiments, the storage units 5, 72, the support unit 10, and the sphere (support unit) 76 move in response to the magnetic field generated by the excitation coil (magnetic field generating means), but other power is used. You may move them.
FIG. 11 is a cross-sectional view of a data erasing apparatus according to the fourth embodiment of the present invention, and shows a configuration in which a support portion (rod) is moved by a solenoid 83.
That is, in the data erasing device 81 shown in FIG. 11, the storage portion 79 is pivotally supported at the distal end side and can swing around the shaft 82. A solenoid 83 is provided on the back wall 11 side of the destruction chamber 71 and below the storage portion 79, and a support portion (rod) of the solenoid 83 is in contact with the back surface of the storage portion. In the data erasing device 81 shown in FIG. 11, by energizing the solenoid 83, the support portion (rod) is expanded and contracted to change the posture of the storage portion 79. In this embodiment, the solenoid is illustrated, but a motor or a cylinder may be used.

In the embodiment described above, the configuration for destroying the hard disk device has been described as an example. However, other magnetic media and optical media can also be destroyed. In addition, a configuration in which a storage unit is made larger, for example, a notebook personal computer is stored in the destruction chamber as it is, and data stored in a built-in hard disk device or the like can be erased.
Further, it is possible to adopt a configuration in which the support portion is directly brought into contact with the hard disk device or the notebook computer while omitting the storage portion.
In the embodiment described above, both the magnetic field generating means and the electromagnetic wave generating means are provided, but only one of them may be provided.

  In any of the data erasing apparatuses of the above-described embodiments, the relative attitude of the data recording medium with respect to the magnetic field generating means or the electromagnetic generating means is changed by changing the attitude of the data recording medium itself. On the other hand, in the data erasing apparatus of the fifth embodiment described below with reference to FIGS. 12 to 17, the data recording medium itself is fixed in position, and the magnetic field generating means of the data recording medium is changed by changing the attitude of the magnetic field generating means. The posture with respect to is changed relatively. FIG. 12 is a perspective view of a data erasing apparatus according to the fifth embodiment of the present invention. FIG. 13 is an exploded perspective view of the data erasing apparatus of FIG. 14A is a front view of the data erasing apparatus of FIG. 12, and FIG. 14B is a right side view of the data erasing apparatus of FIG. FIG. 15 is a cross-sectional view taken along the line BB in FIG. FIG. 16 is a cross-sectional view taken along the line AA in FIG. 14A and shows a state in which the destruction chamber is in a basic posture. 17 is a cross-sectional view showing a state in which the destruction chamber is swung in the data erasing apparatus of FIG. 16, wherein (a) shows a state in the second posture, and (b) shows a state in the third posture. .

  As shown in FIGS. 12 and 13, the data erasing apparatus 101 of the fifth embodiment includes an outer box part 102, a destruction chamber 103 and a storage part 105, and stores a data recording medium such as a hard disk device 68. The data is stored in 105 and data is erased.

The outer box part 102 covers the destruction chamber 103 and the storage part 105 from the outside. An opening 109 is provided in the front wall 110 of the outer box portion 102. Further, a support member 116 for supporting the storage unit 105 is provided on the back wall 115 of the outer box unit 102. The support member 116 is an elongated rectangular parallelepiped member and is continuous over the entire width of the back wall 115. The height of the upper end of the support member 116 is the same as the height of the lower end of the opening 109. Furthermore, as shown in FIGS. 13 and 14 (b), through holes 108 are provided on both side surfaces of the outer box portion 102. The through hole 108 is a circular hole, and one through hole 108 is provided at approximately the center of both side surfaces.
12 and 13, the front wall 110 and the opening 109 of the outer box portion 102 are indicated by phantom lines.

  The storage unit 105 has the same configuration as the storage unit 5 shown in FIGS. That is, as shown in FIGS. 12 and 13, the storage portion 105 has a shape like a drawer, and has a box shape in which only the top surface is opened. The storage unit 105 includes a front wall 120, a back wall 121, a bottom wall 122, and left and right side walls 123 and 124. Further, a handle 130 is provided on the front wall 120. The shape of the front wall 120 is substantially the same as the shape of the opening 109 of the outer box portion 102.

The destruction chamber 103 is a rectangular box made of a non-magnetic material such as resin as in the destruction chamber 3 of FIGS. 1 and 2, but unlike the destruction chamber 3, it has a cylindrical shape without a front wall and a back wall. It has the shape of Further, as shown in FIG. 12, support shafts 107 are provided on both side surfaces of the destruction chamber 103. The support shaft 107 has a cylindrical shape, and one support shaft 107 is provided at approximately the center of both side surfaces. The diameter of the support shaft 107 is substantially the same as or slightly smaller than the diameter of the through hole 108 of the outer box portion 102. The support shaft 107 is configured to transmit a driving force of a motor (not shown) included in the data erasing device 101.
An exciting coil (magnetic field generating means) 12 is wound around the destruction chamber 103.

  As shown in FIGS. 12, 13, and 15, the width of the storage unit 105 is slightly smaller than the width inside the destruction chamber 103. Further, the height of the storage unit 105 is smaller than the height inside the destruction chamber 103. Furthermore, as shown in FIGS. 12, 13, and 16, the depth of the storage unit 105 is longer than the depth of the destruction chamber 103.

The mutual positional relationship among the outer box unit 102, the destruction chamber 103, and the storage unit 105 in the data erasing apparatus 101 will be described.
As shown in FIG. 16, the storage portion 105 is supported by a lower end of the opening 109 of the outer box portion 102 and a support member 116 provided on the back wall 115. That is, only the lower end of the opening 109 of the outer box portion 102 and the support member 116 provided on the back wall 115 are in contact with the bottom wall 122 of the storage unit 105, and it is like a both-end support beam supported at two points. It becomes a support state. Further, as shown in FIG. 14A, the front wall 120 of the storage unit 105 is exposed from the opening 109.

  As shown in FIG. 12, the storage unit 105 is inserted into the destruction chamber 103, and the destruction chamber 103 covers the central portion of the storage unit 105. As shown in FIG. 15, the upper and lower sides and the left and right sides of the storage unit 105 are separated from the inner surface of the destruction chamber 103. The side surfaces 123 and 124 of the storage unit 105 and the inner surface of the destruction chamber 103 are only separated so as not to contact each other. On the other hand, the top surface (having an opening) of the storage unit 105 and the inner surface of the destruction chamber 103 and the bottom wall 122 of the storage unit 105 and the inner surface of the destruction chamber 103 are separated from each other by a sufficient distance.

  Further, as shown in FIG. 15, the upper and lower sides and the left and right sides of the destruction chamber 103 are separated from the inner surface of the outer box portion 102. The both side surfaces of the destruction chamber 103 and the inner surface of the destruction chamber 103 are only separated so as not to contact each other. On the other hand, the top surface of the destruction chamber 103 and the inner surface of the destruction chamber 103 and the bottom surface of the destruction chamber 103 and the inner surface of the destruction chamber 103 are separated from each other by a sufficient distance.

  As shown in FIG. 15, the support shafts 107 provided on both side surfaces of the destruction chamber 103 are inserted into through holes 108 provided on both side surfaces of the outer box portion 102. The axis of the support shaft 107 and the central axis of the through hole 108 are substantially coincident. Therefore, the through hole 108 functions as a bearing, and the destruction chamber 103 is swingably supported by the support shaft 107.

  The electric circuit of the data erasing apparatus 101 is obtained by removing the electromagnetic wave generator 36 from the electric circuit shown in FIG. That is, the electric circuit of the data erasing device 101 includes a magnetic field generation unit 35 and a control unit 50, and a power transformer 34 that supplies AC power to these units. The function of each unit is the same as that of the data erasing device 1, and thus the description thereof is omitted.

The operation of the data erasing apparatus 101 of this embodiment will be described along the operation procedure of the data erasing apparatus 101.
The data erasing apparatus 101 of the present embodiment is mainly for erasing data of a hard disk device, similarly to the data erasing apparatus 1 of FIG. During processing, the hard disk device 68 is removed from the computer or the like. On the other hand, the storage portion 105 is extracted from the outer box portion 102, and the hard disk device 68 is inserted as shown in FIG. Then, the accommodating portion 105 is inserted into the outer box portion 102. At this time, the accommodating part 105 is supported by the lower end of the opening 109 provided in the front side of the outer box part 102, and the support member 116 provided in the back wall 115, and is maintaining the horizontal state. On the other hand, the oscillating destruction chamber 103 is also kept horizontal as shown in FIG. 16, and this posture is the basic posture of the destruction chamber 103.

  In this state, the magnetic field generator 35 is caused to function, and an damped alternating magnetic field is generated in the destruction chamber 103 by the exciting coil (magnetic field generating means) 12 (step 1). The data of the hard disk device 68 is erased by the first excitation process in step 1.

  When the first excitation process in step 1 is completed, the data erasure process is temporarily stopped (step 2).

  Next, a motor (not shown) that transmits a driving force to the support shaft 107 of the destruction chamber 103 is operated, and the destruction chamber 103 is tilted about the support shaft 107 so as to have a posture as shown in FIG. (Step 3). As a result, the destruction chamber 103 generally has an inclined posture (second posture) as shown in FIG. 16A, and the posture of the hard disk device 68 with respect to the excitation coil (magnetic field generating means) 12 wound around the destruction chamber 103. Changes relatively.

  Next, the second excitation process is executed (step 4). Also in the second excitation process, the magnetic field generation unit 35 is caused to function, and the excitation coil 12 generates a damped alternating magnetic field in the destruction chamber 103, and the data of the hard disk device 68 is erased again. However, in the second excitation process, the attitude of the hard disk device 68 is different from that in the first excitation process. Go around. For this reason, all data in the hard disk device 68 is erased without omission.

  When the second excitation process in step 4 is completed, the data erasure process is temporarily stopped (step 5).

  Next, a motor (not shown) that transmits a driving force to the support shaft 107 of the destruction chamber 103 is operated, and the destruction chamber 103 is tilted about the support shaft 107 so as to have a posture as shown in FIG. (Step 6). That is, in step 6, the destruction chamber 103 is tilted in the direction opposite to that in step 3. As a result, the destruction chamber 103 generally has an inclined posture (third posture) as shown in FIG. 16B, and the posture of the hard disk device 68 with respect to the excitation coil (magnetic field generating means) 12 wound around the destruction chamber 103. However, it changes relatively further.

Next, the third excitation process is executed (step 7). Also in the third excitation process, the magnetic field generator 35 generates a damped alternating magnetic field in the destruction chamber 103 by the excitation coil 12, and the data in the hard disk device 68 is erased again. However, in the third excitation process, since the attitude of the hard disk device 68 is different from that in the first and second times, there is some negative effect during the first and second excitation processes. The magnetic field spreads to the part that was. For this reason, all data in the hard disk device 68 is erased without omission.
If necessary, the process may return to step 1 after step 7 and repeat steps 1-7.

  As described above, in the data erasing apparatus 101 of the present embodiment, the basic posture (FIG. 16), the second posture (FIG. 17 (a)), the first posture are obtained by swinging the destruction chamber 103 about the support shaft 107. The posture is changed in order of three postures (FIG. 17B).

  In the present embodiment, the posture of the destruction chamber 103 is changed to three postures (basic posture, second posture, and third posture), but a finer posture can be set. For example, an intermediate posture between the basic posture and the second posture or between the basic posture and the third posture may be further set, and the excitation process may be performed in each posture.

In the present embodiment, the destruction chamber 103 is swung by the driving force of the motor, but the destruction chamber 103 may be swung by other means. For example, the destruction chamber 103 may be swung by attaching a lever to the tip of the support shaft 107 and manually operating the lever. As another example, similarly to the data erasing apparatus 1 of FIG. 1, an iron piece is attached to the bottom of the destruction chamber 103, and the iron piece receives a force in response to the magnetic field generated by the excitation coil 12, thereby causing the destruction chamber 103. May be swung.
Further, similarly to the data erasing apparatus 1 of FIG. 1, the destruction chamber 103 may be provided with a magnetron (electromagnetic wave generating means) in addition to the exciting coil (magnetic field generating means) 12.

Also in this embodiment, the configuration for destroying the hard disk device has been described as an example, but other magnetic media and optical media can also be destroyed. In addition, by making the storage unit 105 larger, for example, a notebook personal computer can be stored in the storage unit 105 as it is and the data of the built-in hard disk device or the like can be erased.
In addition, the storage unit 105 may be omitted, and a configuration in which the hard disk device or the notebook computer is kept in a horizontal state by bringing the lower end of the opening 109 into contact with the support member 116 is also possible.

  FIG. 18 is a perspective view of a data erasing apparatus according to the sixth embodiment of the present invention. FIG. 19 is a perspective view of the internal configuration of the data erasing apparatus of FIG. FIG. 20 is a vertical right side view of the tray. FIG. 21 is a plan view of the tray.

A data erasing apparatus 201 shown in FIG. 18 has an outer box portion 202 formed in a rectangular box shape, and an opening 204 is provided at the front center of the outer box portion 202, and an operation button 203 is provided at the upper left thereof. It has been.
The opening 204 is closed by a front wall 207 of a tray 205 accommodated therein, and a handle 206 protruding forward is provided at the center of the front wall 207.

  As shown in FIG. 19, the tray 205 has a box-shaped outer case 208 having an open upper surface fixed to the back side of the front wall 207. The outer case 208 is formed of a resin member (non-metallic member) in a substantially rectangular parallelepiped shape that is long in the front-rear direction and narrow in the left-right width direction.

An insertion hole 211 that allows insertion and removal of the outer case 208 of the tray 205 is provided inside the opening 204 (see FIG. 18) on the front surface of the outer box 202. Around the insertion hole 211, an exciting coil (magnetic field generating means) 212 is arranged with the direction of the axis S in the direction in which the tray 205 is inserted. Accordingly, the insertion hole 211 is provided in the axis of the exciting coil 212.
The exciting coil (magnetic field generating means) 212 can generate a magnetic force in the magnetic field direction G from the front to the back, and can also generate a magnetic field in the opposite direction.

  As shown in FIGS. 20 and 21, a buffer material 221 having a constant thickness is adhered to the entire inner surface (rear surface) of the front plate 208 a of the outer case 208 over the entire upper, lower, left, and right sides. In addition, a buffer material 222 having a constant thickness is attached to the entire front, rear, left, and right sides of the inner surface (upper surface) of the bottom plate 208b of the outer case 208.

  Further, on the inner surface side of the back plate 208c of the outer case 208, there is provided a support projection (mounting portion) 225 of a resin member (non-metallic member) that protrudes substantially horizontally toward the front slightly above the bottom portion, A buffer material 226 having a constant thickness is attached to the entire upper, lower, left, and right sides above the support protrusion 225.

  The left and right side plates 208d of the outer case 208 are provided with support shafts (inner case support portions) 223 of resin members (non-metal members) installed on the left and right at substantially the center in the front-rear direction and below the center in the vertical direction. ing. Above the support shaft 223, a box-shaped inner case 233 having an open upper surface is placed. The inner case 233 is pivotally supported by the support shaft 223 and can swing like a seesaw.

  The upper end of the support shaft (inner case support portion) 223 is configured to have the same height as the upper end of the support protrusion (mounting portion) 225. For this reason, the inner case 233 can be held substantially horizontally on the upper surfaces of the support shaft 223 and the support protrusion 225.

  Regulating guides 224 formed of a U-shaped groove are provided symmetrically at the substantially central portion of the inner surface of the left and right side plates 208d of the outer case 208.

  The inner case 233 is formed of a resin member (non-metallic member) in a substantially rectangular parallelepiped shape that is long in the front-rear direction and narrow in the left-right width direction, and is sized to accommodate the hard disk device 239. Furthermore, the inner case 233 is formed such that the inner surface is larger in the front-rear direction and the vertical direction than the hard disk device 239. As a result, the hard disk device 239 can move back and forth within the inner case 233. Further, the buffer member 231 placed on the hard disk device 239 can be prevented from falling outside the inner case 233.

  On the outer surface of both the left and right side surfaces of the inner case 233, a restriction projection 234 is provided symmetrically at the center. The restriction protrusion 234 is fitted in the restriction guide 224, and the movement range of the inner case 233 is restricted so that the restriction protrusion 234 can move only within the restriction guide 224.

FIG. 22 is a circuit block diagram of the data erasing apparatus of FIG.
The data erasing device 201 is connected to an AC power supply 245, and an operation switch 246 that is linked to the operation button 203 (see FIG. 18) is provided at a subsequent stage of the AC power supply 245, and a rectifier circuit 244 is provided at the subsequent stage. Is provided. The rectifier circuit 244 is a circuit that full-wave rectifies the AC voltage using a diode bridge or the like. Note that the rectifier circuit 244 may be provided with an appropriate power transformer or the like.

  A capacitor 243 and an exciting coil (magnetic field generating means) 212 are connected in parallel to the subsequent stage of the rectifier circuit 244, and a polarity reversing switch (switching means) that reverses the polarity between the capacitor 243 and the exciting coil 212. 242 and a demagnetizing switch 241 are provided. The polarity reversing switch 242 is controlled to be switched by a switching control circuit (not shown), and switches the polarity direction discharged from the capacitor 243 to the exciting coil 212 between forward and reverse. The demagnetization switch 241 is ON / OFF controlled by a switching control circuit and a timer circuit (not shown).

FIG. 23 is a flowchart of operations executed by the data erasing apparatus of FIG. FIG. 24 is an explanatory diagram for explaining the relationship between the attitude of the hard disk device and the direction of the magnetic field. FIG. 24 (a) is step 3, FIG. 24 (b) is step 5, and FIG. 24 (c) is step 7. Indicates the state. FIG. 25 is a vertical right side view of the tray at the end of step 3. FIG. 26 is a vertical right side view of the tray at the end of step 5.
The data erasing device 201 waits until the operation button 203 is pressed (step S1: NO). When the operation button 203 is pressed (step S1: YES), charging of the capacitor 243 is started (step S2).

  When capacitor 243 is sufficiently charged, the timer circuit discharges the charge stored in capacitor 243 in the first direction (the direction of arrow A in FIG. 22) (step S3). Step S3 corresponds to the first magnetic field generation process. At this time, a magnetic field in the direction of arrow A shown in FIG. 20 is generated, and as shown in the explanatory diagram of FIG. 24A, the magnetic disk 239a in the hard disk device 239 is demagnetized by the magnetic field Ga in a portion other than the shadow area E1. Is done. That is, since the rotation drive unit 239b is provided at the center of the magnetic disk 239a, the magnetic field does not spread sufficiently behind the rotation drive unit 239b, and the magnetic information (data) cannot be completely erased. A possible shadow region E1 is created.

  Further, the hard disk device 239 made of metal receives a force from the magnetic field Ga, moves to the back side as shown in the vertical right side view of FIG. 25, and is supported substantially horizontally on the support shaft 223 and the support protrusion 225. The For this reason, the hard disk device 239 and the inner case 233 shift from a state inclined about 30 ° forwardly downward as shown in FIG. 20 to a substantially horizontal state as shown in FIG. The hard disk device 239 moves to the rear of the inner case 233. Further, the position of the restriction projection 234 moves from the front end portion of the restriction guide 224 to the rear end portion.

  At this time, the back surface of the inner case 233 collides with the inner side of the back plate 208c of the outer case 208, but the shock is reduced by the cushioning material 226. Further, when the hard disk device 239 moves rearward in the inner case 233, the spherical cushioning member 231 placed on the front upper part of the hard disk device 239 is in the inner case 233 formed in front of the hard disk device 239. It falls into the gap and fits.

  The buffer member 231 is not limited to a spherical shape but may be of an appropriate shape. However, by adopting a spherical shape, the position of the hard disk device 239 can be adjusted within the inner case 233 regardless of the posture when the buffer member 231 is fitted. It can be regulated not to move back and forth.

  Further, the voltage application by the capacitor 243 is rapidly performed by turning on the demagnetization switch 241, but since the capacitor 243 and the excitation coil 212 constitute a resonance circuit, the current flowing through the excitation coil 212 is shown in FIG. Attenuating alternating current is obtained. For this reason, the magnetic field generated by the excitation coil 212 is a damped alternating magnetic field. Therefore, the area (all areas other than the shadow area E1) that receives the damped alternating magnetic field on the magnetic disk 239a in the hard disk device 239 is demagnetized, and the magnetic information in that area is erased.

  Subsequently, the data erasing device 201 starts charging the capacitor 243 again (step S4). When the capacitor 243 is fully charged, the switching control circuit switches the polarity inversion switch 242 to invert the polarity, and the timer circuit causes the voltage stored in the capacitor 243 to flow in the second direction (the direction of arrow B in FIG. 25). Discharge (step S5). Step S5 corresponds to a second magnetic field generation process.

  At this time, a magnetic field in the direction of arrow B shown in FIG. 25 is generated, and as shown in the explanatory diagram of FIG. 24B, the magnetic disk 239a in the hard disk device 239 is demagnetized by the magnetic field Gb in a portion other than the shadow area E2. Is done. Further, the hard disk device 239 made of metal moves to the front side by the magnetic field Gb as shown in the vertical right side view of FIG. At this time, since the buffer member 231 exists, the hard disk device 239 does not move to the front side in the inner case 233, and the inner case 233 moves as a whole. The inner case 233 collides with the front plate 208 a of the outer case 208, but the shock is softened by the buffer material 221.

  Further, the inner case 233 moves to the front side, whereby the rear side end of the inner case 233 is detached from the support protrusion 225. At this time, since the hard disk device 239 is located rearward in the inner case 233, the center of gravity is located behind the support shaft 223, and the inner case 233 rotates rearward downward due to gravity, and lowers backward by about 30 degrees. In this state, it is supported by the support shaft 223. At this time, the position of the restriction projection 234 is located at the central bent portion of the restriction guide 224.

  Subsequently, the data erasing device 201 starts charging the capacitor 243 again (step S6). When the capacitor 243 is sufficiently charged, the polarity control switch 242 is switched by the switching control circuit to reverse the polarity again to return to the initial state, and the voltage stored in the capacitor 243 by the timer circuit is changed in the third direction (FIG. 22 (in the direction of arrow C) (step S7). Step S7 corresponds to a third magnetic field generation process.

  At this time, a magnetic field in the direction of arrow C shown in FIG. 26 is generated, and as shown in the explanatory diagram of FIG. 24C, the magnetic disk 239a in the hard disk device 239 is demagnetized by the magnetic field Gc in a portion other than the shadow area E3. Is done. Further, the hard disk device 239 made of metal moves to the back side together with the inner case 233 by the magnetic field Gc, but the shock is softened because of the buffer material 226.

  Through the above operation, magnetic fields in three directions can be generated in order for the hard disk device 239, and magnetic information recorded on the magnetic disk 239a can be erased. The magnetic disk 239a is provided with a rotation drive unit 239b at the center because of its rotational drive structure. When a magnetic field is generated in one direction, the rotation drive unit 239b generates a shadow of the magnetic field. As a result, the magnetic field is spread over the shadow portion, and the magnetic information can be erased with certainty. FIG. 27 is an explanatory diagram for explaining the relationship between the direction of the magnetic field and the shadow area in the magnetic disk. That is, in this embodiment, by sequentially generating magnetic fields in three directions, as shown in the explanatory diagram of FIG. 27, the area where all of the shadow areas E1, E2, and E3 overlap can be made zero, and the magnetic information can be reliably obtained. Can be deleted.

  In this embodiment, since the hard disk device 239 made of metal is used to move the hard disk device 239 using the force received by the magnetic field, the magnetic field applied to the hard disk device 239 can be simply switched between the forward and reverse directions. The direction (angle) can be switched. For this reason, for example, it can be manufactured at a lower cost than a case where a stepping motor is provided and the angle of the hard disk device 239 is changed by a predetermined angle. Further, since a circuit for connecting the stepping motor and a circuit for controlling the rotation angle are not required, the circuit configuration can be simplified, and the cost can be reduced also in this respect.

  Furthermore, since the capacitor 243 cannot be charged while a current is passed through the stepping motor to change the angle, erasure of magnetic information can be completed in a short time.

  In addition, it is not necessary to consider that the stepping motor and the circuit that controls the stepping motor are affected by the strong magnetic field for erasing the magnetic information of the hard disk device 239. Therefore, there is no need to shield the stepping motor and the circuit that controls the stepping motor, and the design of the data erasing device 201 can be simplified and the cost can be reduced.

In the above embodiment, the range in which the inner case 233 moves in the outer case 208 is regulated by the regulation guide 224 and the regulation projection 234, but the regulation guide 224 and the regulation projection 234 are not provided, and the inner case can be freely controlled to some extent. You may comprise so that 233 can move.
Further, the present invention is not limited to the hard disk device 239, and may be used when erasing magnetic information of another data recording medium such as a video tape.

  Moreover, although the AC voltage is full-wave rectified to use DC, the configuration is not limited to this, and AC may be used. Even in this case, the current flowing through the exciting coil (magnetic field generating means) 212 can be an alternating current that is switched in the forward and reverse directions, and the magnetic field generated by the exciting coil 212 can be an alternating magnetic field in which the magnetic poles are alternately switched in the forward and reverse directions. . If the alternating voltage to be applied is gradually attenuated, the current flowing through the exciting coil 212 can be used as the damped alternating current, and the damped alternating magnetic field can be generated by the exciting coil 212.

  The data erasing apparatus 201 shown in FIG. 18 includes only the magnetic generation means, but may further include electromagnetic wave generation means such as a magnetron.

  The spherical cushioning member 231 provided in the data erasing device 201 of FIG. 18 can also be adopted in the data erasing device of other embodiments. That is, the storage unit may be regarded as an inner case, and a buffer member that can be fitted between the storage unit and the data recording medium stored in the storage unit may be further provided.

1 is a perspective view of a data erasing device according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the data erasing apparatus of FIG. 1. FIG. 2 is a cross-sectional view of the data erasing device of FIG. 1, showing a state in which the internal hard disk device is in a basic posture. FIG. 2 is a cross-sectional view of the data erasing device of FIG. 1, showing a state in which the internal hard disk device is in a second posture. FIG. 2 is a basic circuit diagram of the data erasing device shown in FIG. 1. 2 is a graph showing the intensity of a magnetic field generated by the data erasing apparatus shown in FIG. 3 is a flowchart showing an operation procedure of the data erasing apparatus shown in FIG. 1. It is sectional drawing of the data erasing apparatus of 2nd embodiment of this invention. It is sectional drawing of the data erasing apparatus of 3rd embodiment of this invention, and shows the state which has an internal hard disk apparatus in a basic attitude. FIG. 10 is a cross-sectional view of the data erasing apparatus of FIG. 9, showing a state in which the internal hard disk device is in the second posture. It is sectional drawing of the data erasing apparatus of 4th embodiment of this invention. It is a perspective view of the data erasing apparatus of 5th embodiment of this invention. FIG. 13 is an exploded perspective view of the data erasing apparatus of FIG. 12. (A) is a front view of the data erasing apparatus of FIG. 12, and (b) is a right side view of the data erasing apparatus of FIG. It is BB sectional drawing of FIG.14 (b). It is AA sectional drawing of Fig.14 (a), and shows the state which has a destruction chamber in a basic attitude | position. FIG. 17 is a cross-sectional view showing a state in which the destruction chamber is swung in the data erasing apparatus of FIG. 16, wherein (a) shows a state in the second posture, and (b) shows a state in the third posture. It is a perspective view of the data erasing device of 6th embodiment of this invention. It is a perspective view which shows the internal structure of the data erasing apparatus of FIG. It is a vertical right side view of a tray. It is a top view of a tray. FIG. 19 is a circuit block diagram of the data erasing device of FIG. 18. It is a flowchart of the operation | movement which the data erasing apparatus of FIG. 18 performs. It is explanatory drawing explaining the relationship between the attitude | position of a hard-disk apparatus, and the direction of a magnetic field, (a) shows step 3, (b) shows step 5, (c) shows the state in step 7. It is a vertical right side view of the tray at the end of step 3. It is a vertical right side view of the tray at the end of step 5. It is explanatory drawing explaining the relationship between the direction of the magnetic field in a magnetic disc, and a shadow area.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Data erasing device 3 Destruction room 5 Storage part 10 Support part 12 Excitation coil (magnetic field generation means)
13 Magnetron (electromagnetic wave generation means)
68 Hard disk device (data recording medium)
70 Data erasing device 71 Destruction chamber 72 Storage part 76 Ball (support part)
79 Storage part 81 Data erasing device 101 Data erasing device 103 Destruction chamber 105 Storage part 201 Data erasing device 208 Outer case 212 Exciting coil (magnetic field generating means)
221 Buffer material 223 Support shaft (inner case support part)
225 Support protrusion (mounting part)
226 Buffer material 231 Buffer member 233 Inner case 239 Hard disk device (data recording medium)
242 Polarity reversing switch (switching means)
Ga, Gb, Gc magnetic field

Claims (20)

  A data erasing apparatus for erasing data recorded on a data recording medium, either a magnetic field generating means for generating a magnetic field, or an electromagnetic wave generating means for generating an electromagnetic wave having a predetermined frequency and a predetermined intensity, or both A data erasing apparatus, characterized in that the attitude of the data recording medium relative to one or both of the magnetic field generating means and the electromagnetic wave generating means can be changed relatively.   The data erasing apparatus according to claim 1, wherein at least the attitude of the data recording medium itself can be changed.   A destruction chamber that is exposed to the magnetic field generated by the magnetic field generation unit or the electromagnetic wave generated by the electromagnetic wave generation unit; and a support unit that is provided in the destruction chamber and supports the data recording medium itself or a storage unit that stores the data recording medium. The support unit, the data recording medium itself, or the storage unit is movable, and the support by the support unit is released when these units move. Data eraser.   A destruction chamber that is exposed to the magnetic field generated by the magnetic field generation unit or the electromagnetic wave generated by the electromagnetic wave generation unit; and a support unit that can support the data recording medium itself or a storage unit that stores the data recording medium provided in the destruction chamber. Any one of the support part, the data recording medium itself, and the storage part is movable, and the movement of the support part changes from a state where the support by the support part is released to a supported state. The data erasing apparatus according to claim 2.   A destruction chamber that is exposed to the magnetic field generated by the magnetic field generation unit or the electromagnetic wave generated by the electromagnetic wave generation unit; and a support unit that is provided in the destruction chamber and supports the data recording medium itself or a storage unit that stores the data recording medium. Any of the support unit, the data recording medium itself, and the storage unit is movable, and the support balance of the data recording medium itself or the storage unit that stores the data recording medium is changed by moving the support unit, the data recording medium itself, or the storage unit. The data erasing apparatus according to claim 2.   6. The apparatus according to claim 3, further comprising at least a magnetic field generating unit, wherein any one of the support unit, the data recording medium itself, and the storage unit is movable by an action of a magnetic field generated by the magnetic field generating unit. The data erasing device according to any one of the above.   2. The data erasing apparatus according to claim 1, wherein at least one of or both of the magnetic field generating means and the electromagnetic wave generating means can be changed in attitude.   And a destruction chamber that is exposed to a magnetic field generated by the magnetic field generation unit or an electromagnetic wave generated by the electromagnetic wave generation unit while accommodating the data recording medium, and the magnetic field generation unit and the electromagnetic wave generation unit are moved by the oscillation of the destruction chamber. The data erasing apparatus according to claim 7, wherein one or both of the attitudes change.   During the data erasing process by one or both of the magnetic field generating means and the electromagnetic wave generating means, or the data erasing process by one or both of the magnetic field generating means and the electromagnetic wave generating means is executed a plurality of times, and the data is 9. The data erasing apparatus according to claim 1, wherein the attitude of the recording medium itself or the attitude of either one or both of the magnetic field generating means and the electromagnetic wave generating means can be changed.   The inner case for accommodating a data recording medium and an outer case for accommodating the inner case are further provided, and the inner case is swingably supported by the outer case. Data eraser.   The outer case includes an inner case support portion that supports the inner case in a swingable manner, and a placement portion that can place and support one end of the inner case to hold the inner case in a substantially horizontal state. The data erasing apparatus according to claim 10.   At least an exciting coil is provided as a magnetic field generating means, and the exciting coil can generate a magnetic field in a direction from the inner case support portion to the mounting portion, and a voltage in a direction opposite to a forward voltage with respect to the exciting coil. The data erasing apparatus according to claim 11, further comprising switching means capable of sequentially switching and applying the data.   13. The data erasing apparatus according to claim 10, wherein the data recording medium accommodated in the inner case is used in a state of being movable along the bottom surface of the inner case.   The inner surface of the outer case and the outer surface of the outer case face each other, and a cushioning material is provided on a part or all of at least one of the inner surface and the outer surface. The data erasing device according to any one of the above.   The switching means can sequentially execute a first magnetic field generating process for applying a voltage in the forward direction, a second magnetic field generating process for applying a voltage in the reverse direction, and a third magnetic field generating process for applying a voltage in the positive direction. 15. The data erasing apparatus according to claim 10, wherein the data erasing apparatus is any one of claims 10 to 14.   16. The apparatus according to claim 1, further comprising: a buffer member capable of being fitted between the inner case and the data recording medium accommodated in the inner case. The data erasing device according to any one of the above.   A data erasing method for erasing data recorded on a data recording medium, and either or both of a magnetic field generating means for generating a magnetic field and an electromagnetic wave generating means for generating an electromagnetic wave having a predetermined frequency and a predetermined intensity The data recording medium is exposed to a magnetic field or an electromagnetic wave in a plurality of postures in which the posture of the data recording medium relative to one or both of the magnetic field generating means and the electromagnetic wave generating means is relatively different Erasing method.   18. The data erasing method according to claim 17, wherein at least the attitude of the data recording medium itself is changed.   18. The data erasing method according to claim 17, wherein the attitude of at least one of or both of the magnetic field generating means and the electromagnetic wave generating means is changed.   During the data erasing process by one or both of the magnetic field generating means and the electromagnetic wave generating means, or the data erasing process by one or both of the magnetic field generating means and the electromagnetic wave generating means is executed a plurality of times, and the data is 20. The data erasing method according to claim 17, wherein the attitude of the recording medium itself or the attitude of either one or both of the magnetic field generating means and the electromagnetic wave generating means is changed.

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