JP2010146619A - Storage device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage device for destroying a storage medium only during illegal disassembly. <P>SOLUTION: The storage device in which a storage medium is housed in a housing part, the inside of the housing part is closed by a cover part, and the storage medium is housed in a closed state from the outside by the housing part and the cover part includes a screw that pierces the cover part, a fluid-containing part arranged in the housing part to contain fluid that destroys the storage medium, and a damaging part arranged opposedly to the fluid-containing part to damage the fluid-containing part, wherein either the fluid-containing part or the damaging part is provided integrally with the screw. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a storage device having a storage medium therein.

  An HDD (Hard Disk Drive) will be described as an example of an external storage device of a computer.

  In recent years, information terminals using HDDs have been widely spread. The HDD is superior in the amount of information recording and cost compared to other storage devices, and is used particularly when a huge amount of data is recorded. Since it is not uncommon for HDD to record highly valuable information commercially, the number of cases where information is read from a stolen or discarded HDD and misused is increasing. Therefore, HDD users, especially when discarding HDDs with highly confidential information, format them using dedicated data erasing software or equipment, or destroy them after physically destroying the media. . Also, against theft, the HDD user can cope to some extent by providing a plurality of protections for access to the HDD and performing data encryption processing.

As conventional techniques, there are hard disk devices that prevent unauthorized use, hard disk devices that detect opening, and magnetic card reader / writers that prevent unauthorized use of high-component products (for example, Patent Document 1, Patent Document 2, Patent Document 3). reference).
JP 2004-103201 A JP 2004-55019 A JP-A-7-169175

  However, there are cases where measures against theft are insufficient. For example, a person with advanced expertise can disassemble the magnetic disk device, take out the recording medium, remove the protection, decrypt the code, and read the information. Also, data erasure using HDD (Hard Disk Drive) recycling format software, which is currently in widespread use, may be incomplete erasure, so that users of magnetic disk devices do not need to provide special protection. It may be discarded.

  As described above, HDDs with insufficient anti-theft measures are purchased in the second-hand market, and the problem that personal data is misused by restoring the HDD data is increasing year by year. These problems are also caused by the fact that the HDD can be disassembled relatively easily.

  In response to the above problem, a mechanism has been proposed in which information recorded on the HDD is automatically deleted when the HDD is disassembled. In this case, it is effective when the HDD is disassembled illegally, but when the manufacturer performs regular disassembly for investigating the cause or repairing due to the failure of the HDD, the number of processes required for disassembly increases. Many. In addition, although a means for providing an HDD with a sensor that detects unauthorized disassembly is also considered, there is a concern about malfunction and cost.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a storage device that destroys a storage medium only at the time of unauthorized disassembly.

  In order to solve the above-described problem, according to one embodiment of the present invention, a storage medium is stored in a storage portion, the inside of the storage portion is closed by a lid portion, and the storage medium is closed from the outside by a storage portion and a lid portion A storage device, a screw penetrating the lid, a fluid containing portion disposed inside the containing portion for containing a fluid that destroys the storage medium, and disposed opposite to the fluid containing portion. And one of the fluid containing part and the damaged part is provided integrally with the screw.

  According to the disclosed storage device, the storage medium can be destroyed only at the time of unauthorized disassembly.

  Embodiments of the present invention will be described below with reference to the drawings.

  The configuration of the HDD according to the embodiment will be described below.

  FIG. 1 is a plan view illustrating an example of a configuration of a housing 11 of the HDD according to the embodiment. FIG. 2 is a plan view illustrating an example of the configuration of the lid 12 of the HDD according to the embodiment. In the HDD according to the embodiment, the lid 12 (lid portion) shown in FIG. 2 is placed on the casing 11 (base plate, housing portion) shown in FIG. 1, and a cover sealing screw 14 (fixing screw). And it fixes to the housing | casing 11 with the decomposition | disassembly prevention screw 15a (1st screw). As a result, the inside of the housing 11 (inside the accommodating portion) is sealed. The magnetic recording medium 21 (storage medium), the medium driving unit 22, the magnetic head 23, and the head driving unit 24 are stored in the housing 11.

  The screw positions A, B, and X in FIGS. 1 and 2 indicate the positions of the disassembly prevention screw 15a, the disassembly prevention screw 15b (second screw), and the cover sealing screw 14, respectively. The position A of the disassembly prevention screw 15 a is a position that can be fixed to the housing 12. The position B of the disassembly prevention screw 15b may not be a position that can be fixed to the housing 12, but may be on the magnetic recording medium 21 or the like. The position X of the cover sealing screw 14 is a position where the housing 11 and the lid 12 are in close contact.

  FIG. 3 is a cross-sectional view showing an example of the configuration in the vicinity of the cover sealing screw 14 in the HDD of the embodiment. In this figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts as those in FIG. 1, and the description thereof is omitted here. The cover sealing screw 14 passes through the lid 12 and is fastened and fixed to a screw hole (female screw) inside the housing 11. In addition, a packing 13 is inserted between the housing 11 and the lid 12 in order to maintain the airtightness of the space inside the housing 11. A regular disassembler loosens and pulls out the cover sealing screw 14 as a regular disassembly method. The cover sealing screw 14 does not screw with the lid 12.

  FIG. 4 is a cross-sectional view illustrating an example of a configuration in the vicinity of the disassembly prevention screw 15a in the HDD according to the embodiment. In this figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts as those in FIG. 1, and the description thereof is omitted here. The disassembly prevention screw 15a penetrates the lid 12, and only the fastening portion at the tip of the disassembly prevention screw 15a is fastened and fixed to the screw hole inside the housing 11. This figure shows a state where fastening of the disassembly prevention screw 15a and the housing 11 is completed. The decomposition preventing screw 15a does not screw with the lid 12.

  FIG. 5 is a cross-sectional view showing an example of the configuration in the vicinity of the disassembly prevention screw 15b in the HDD of the embodiment. In this figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts as those in FIG. 1, and the description thereof is omitted here. The decomposition prevention screw 15b penetrates the lid 12, but is not fixed to the housing 11. The decomposition prevention screw 15 b is screwed with the lid 12.

  Details of the decomposition preventing screw 15a will be described below.

  The decomposition prevention screw 15a passes through the lid 12, the gas container 31 (fluid containing portion), and the protrusion fixing portion 33 in order from the head side. The fastening portion of the decomposition preventing screw 15 a is fastened and fixed to the screw hole of the housing 11.

  The gas container 31 has a hole through which the decomposition preventing screw 15a is passed, and is fixed to the inner surface (inner wall surface) of the lid 12 (inside the housing 11).

  Here, the thread of the cover sealing screw 14, the thread of the fastening part of the disassembly prevention screw 15a, and the thread of the housing 11 to which the fastening part of the cover sealing screw 14 and the disassembly prevention screw 15a are fastened are right-hand screws. . On the other hand, the thread other than the fastening portion of the disassembly prevention screw 15a is a left-hand screw. Thereby, when the decomposition preventing screw 15a is loosened, the protrusion fixing portion 33 does not fall out of the decomposition preventing screw 15a. In addition, the protrusion fixing | fixed part 33 may be fixed to the decomposition | disassembly prevention screw 15a.

  The protrusion 32 is fixed to the surface of the protrusion fixing portion 33 on the gas container 31 side so that the protrusion faces the gas container 31. Here, the protrusion 32 and the protrusion fixing part 33 correspond to a damaged part.

  The material of the protrusion 32 and the protrusion fixing portion 33 is, for example, stainless steel (Stainless steel, SUS).

  FIG. 6 is a cross-sectional view showing an example of the configuration of the gas container 31 according to the embodiment. The gas container 31 includes a container body 41, a film 42, and a corrosive gas 43 (fluid). The opening of the container body 41 is sealed with a film 42. The inside of the container body 41 is filled with a corrosive gas 43. The material of the container body 41 and the film 42 is, for example, a fluorine resin such as PTFE (Polytetrafluoroethylene). The material of the corrosive gas 43 can destroy the recording layer of the magnetic recording medium, such as hydrogen sulfide or sulfurous acid. Instead of the corrosive gas 43, a substance that can modify or destroy the surface of the magnetic recording medium 21 in a short time, such as a strongly acidic liquid, may be used.

  Here, in the state where the length of the fastening portion of the disassembly prevention screw 15a fixed to the housing 11 is L, and the disassembly prevention screw 15a is fixed to the housing 11 before disassembly, the gas attached to the disassembly prevention screw 15a. The distance (predetermined distance) between the container 31 and the protrusion 32 is Da.

  As a regular disassembly method, the regular disassembler loosens the disassembly prevention screw 15a so that the axial movement distance of the disassembly prevention screw 15a is greater than La and equal to or less than Da. Thereby, the decomposition preventing screw 15a is separated from the casing 11, and the gas container 31 is not broken. On the other hand, if an unauthorized disassembler who does not know the proper disassembly method loosens the disassembly prevention screw 15a, and the movement distance in the axial direction of the disassembly prevention screw 15a exceeds Da, the protrusion 32 breaks the film 42, and the gas Corrosive gas 43 flows out of the container 31. The corrosive gas 43 that has flowed out destroys the recording layer of the magnetic recording medium 21.

  In the axial direction of the decomposition preventing screw 15a, if the height of the gas container 31 is Pa and the height from the gas container 31 side of the protrusion 32 to the tip of the decomposition preventing screw 15a is Qa, the predetermined distance range is Pa + Qa. is there. Here, the protrusion 32 contacts the film 42 in a state where the distance between the tip of the decomposition preventing screw 15a and the inner wall surface of the lid 12 is less than Pa + Qa.

  The gas container 31 applies a predetermined pressure to the corrosive gas 43 so that the corrosive gas 43 diffuses and easily reaches a wide range of the magnetic recording medium 21 when the film 42 is broken by the protrusion 32. It can also be put in a high pressure state.

  Details of the decomposition preventing screw 15b will be described below.

  Similarly to the decomposition prevention screw 15a, the decomposition prevention screw 15b penetrates the lid 12, the gas container 31 (fluid containing portion), and the protrusion fixing portion 33 in this order from the head side. However, the disassembly prevention screw 15 b is not fixed to the housing 11. Further, the disassembly prevention screw 15 b is screwed with the lid 12. Here, the protrusion 32 and the protrusion fixing part 33 correspond to a damaged part.

  Here, in the state before decomposition, the distance between the gas container 31 associated with the decomposition prevention screw 15b and the protrusion 32 is Db. Db is extremely short compared to Da.

  A regular disassembler does not need to loosen the disassembly prevention screw 15b as a regular disassembly method. If an unauthorized disassembler who does not know the proper disassembly method loosens the disassembly prevention screw 15b, and the axial movement distance of the disassembly prevention screw 15b exceeds Db, the protrusion 32 breaks the film 42, and the gas container 31 Corrosive gas 43 flows out of the air.

  When the height of the gas container 31 is Pb and the height from the gas container 31 side of the protrusion 32 to the tip of the decomposition prevention screw 15b is Qb in the axial direction of the decomposition prevention screw 15b, the predetermined distance range is Pb + Qb. is there. Here, the protrusion 32 contacts the film 42 in a state where the distance between the tip of the decomposition prevention screw 15b and the inner wall surface of the lid 12 is less than Pb + Qb.

  As shown in FIG. 1B, by providing disassembly prevention screws 15b at a plurality of locations on the magnetic storage medium 21, a wide range of recording layers of the magnetic storage medium 21 are destroyed in the case of unauthorized disassembly. be able to.

  Note that the HDD may have only one of the disassembly prevention screws 15a and 15b.

  Further, instead of the above-described configuration in the vicinity of the disassembly prevention screw 15a, a configuration in the vicinity of the following disassembly prevention screw 15c (first screw) may be used.

  FIG. 7 is a cross-sectional view showing an example of the configuration in the vicinity of the disassembly prevention screw 15c in the HDD of the embodiment. In this figure, the same reference numerals as those in FIG. 4 denote the same or corresponding parts as those in FIG. 4, and a description thereof will be omitted here. The disassembly prevention screw 15c penetrates the lid 12, and only the fastening portion at the tip of the disassembly prevention screw 15c is fastened and fixed to the screw hole inside the housing 11. The disassembly prevention screw 15 c does not screw with the lid 12.

  Details of the decomposition preventing screw 15c will be described below.

  The decomposition prevention screw 15c penetrates the lid 12, the gas container 31, and the gas container fixing part 35 in order from the head side. The fastening portion of the decomposition preventing screw 15 c is fastened and fixed to the screw hole of the housing 11. This drawing shows a state where the disassembly prevention screw 15c and the casing 11 are completely fastened.

  The protrusion 32 is fixed to a surface (inner wall surface) on the inner side of the lid 12 (inside the casing 11) so that the protrusion faces the gas container 31.

  Here, the thread of the fastening portion of the disassembly prevention screw 15c is a right-hand screw. On the other hand, the thread other than the fastening portion of the disassembly prevention screw 15c is a left-hand screw. Thereby, when the decomposition | disassembly prevention screw 15c is loosened, the gas container fixing | fixed part 35 does not fall out from the decomposition | disassembly prevention screw 15c. In addition, the gas container fixing | fixed part 35 may be fixed to the decomposition | disassembly prevention screw 15c.

  The gas container 31 has a hole through which the decomposition preventing screw 15c is passed, and is fixed to the surface of the gas container fixing portion 35 on the lid 12 side.

  Here, the length of the fastening portion of the disassembly prevention screw 15c fixed to the housing 11 is Lc, and the gas accompanying the disassembly prevention screw 15c in a state where the disassembly prevention screw 15c is fixed to the housing 11 before disassembly. The distance between the container 31 and the protrusion 32 is Dc.

  As a normal disassembly method, the regular disassembler loosens the disassembly prevention screw 15c so that the axial movement distance of the disassembly prevention screw 15c is greater than Lc and less than or equal to Dc. Thereby, the decomposition preventing screw 15c is separated from the casing 11, and the gas container 31 is not broken. On the other hand, if an unauthorized disassembler who does not know the proper disassembly method loosens the disassembly prevention screw 15c, and the movement distance in the axial direction of the disassembly prevention screw 15c exceeds Dc, the protrusion 32 breaks the film 42, and the gas Corrosive gas 43 flows out of the container 31.

  In the axial direction of the decomposition preventing screw 15c, assuming that the height of the protrusion 32 is Pc and the height from the protrusion 32 side of the gas container 31 to the tip of the decomposition preventing screw 15c is Qc, the predetermined distance range is Pc + Qc. is there. Here, the protrusion 32 contacts the film 42 in a state where the distance between the tip of the decomposition preventing screw 15c and the inner wall surface of the lid 12 is less than Pc + Qc.

  According to this embodiment, when an HDD (or a computer having the HDD) is stolen or unexpectedly discarded, and when information is read when the HDD is disassembled, an unauthorized disassembler is different from the regular disassembly method. By performing the disassembling method, the magnetic recording layer of the magnetic recording medium 21 is destroyed, information reproduction becomes impossible, and information leakage can be prevented. The disassembly method different from the regular disassembly method is, for example, when the disassembler tries to completely remove the disassembly prevention screw 15a or the disassembly prevention screw 15c from the lid in the same manner as other screws, or the disassembly prevention screw 15b that does not need to be removed. It is a case where it is going to remove.

  Further, the present invention can be applied to a magnetic storage device other than the HDD, a semiconductor storage device such as a flash memory, and the like.

  The screws correspond to the disassembly prevention screws 15a, 15b, and 15c.

  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is shown by the scope of claims, and is not restricted by the text of the specification. Moreover, all modifications, various improvements, substitutions and modifications belonging to the equivalent scope of the claims are all within the scope of the present invention.

Regarding the above embodiment, the following additional notes are disclosed.
(Appendix 1)
A storage device in which a storage medium is stored in a storage unit, the inside of the storage unit is closed by a lid, and the storage medium is stored in a state of being closed from the outside by the storage unit and the lid,
A screw that penetrates the lid,
A fluid containing portion disposed inside the containing portion and containing a fluid that destroys the storage medium;
The fluid containing portion is disposed opposite to the fluid containing portion, and includes a damaged portion that breaks the fluid containing portion
A storage device in which one of the fluid containing portion and the damaged portion is provided integrally with the screw.
(Appendix 2)
The damaged portion and the fluid container portion are arranged to face each other with a predetermined distance apart in the screw completion state, and the screw moves from the screw completion direction to the removal direction by the predetermined distance. Contact, and the damaged portion breaks the fluid containing portion,
The storage device according to attachment 1.
(Appendix 3)
The fluid containing portion is provided on an inner wall surface of the lid portion,
The damaged portion is provided between a tip of a fastening portion of the screw and a screw head.
The storage device according to attachment 1.
(Appendix 4)
The screw is screwed with the damaged portion,
In the screw, the winding direction of the screw thread of the portion screwed with the damaged part is opposite to the winding direction of the screw thread of the tip of the screw.
The storage device according to attachment 3.
(Appendix 5)
The damaged portion is provided on the inner wall surface of the lid portion,
The fluid containing portion is provided between a tip portion of a screw fastening portion and a screw head.
The storage device according to attachment 1.
(Appendix 6)
The screw is screwed into the fluid container;
In the screw, the winding direction of the screw thread of the portion screwed with the fluid containing portion is opposite to the winding direction of the screw thread of the tip of the screw.
The storage device according to attachment 5.
(Appendix 7)
The damaged portion has a protrusion directed toward the fluid containing portion, and the protrusion damages the fluid containing portion when contacting the fluid containing portion.
The storage device according to attachment 1.
(Appendix 8)
The fluid is a corrosive gas;
The storage device according to attachment 1.
(Appendix 9)
The fluid container applies a predetermined pressure to the fluid;
The storage device according to attachment 1.
(Appendix 10)
The fluid containing portion is provided at a position where the fluid scatters to the storage medium when damaged by the damaged portion.
The storage device according to attachment 1.
(Appendix 11)
Furthermore,
A fixing screw that penetrates through the lid and is fastened to an appropriate position inside the housing to secure the lid to the housing;
The storage device according to attachment 1.
(Appendix 12)
The screw includes a first screw that fastens a distal end of a fastening portion to the housing portion and fixes the lid portion to the housing portion, and a second screw whose distal end of the fastening portion is located in the internal space of the housing portion. Including at least one,
The storage device according to attachment 1.
(Appendix 13)
The storage medium intersects with an extension line of the axis of the second screw;
The storage device according to attachment 12.
(Appendix 14)
The second screw is screwed with the lid;
The storage device according to attachment 12.

It is a top view which shows an example of a structure of the housing | casing 11 of HDD of embodiment. It is a top view which shows an example of a structure of the lid | cover 12 of HDD of embodiment. It is sectional drawing which shows an example of a structure of the cover sealing screw 14 vicinity in HDD of embodiment. It is sectional drawing which shows an example of a structure of the decomposition | disassembly prevention screw | thread 15a vicinity in HDD of embodiment. It is sectional drawing which shows an example of a structure of the decomposition | disassembly prevention screw | thread 15b vicinity in HDD of embodiment. It is sectional drawing which shows an example of a structure of the gas container 31 of embodiment. It is sectional drawing which shows an example of a structure of the decomposition prevention screw | thread 15c vicinity in HDD of embodiment.

Explanation of symbols

11 Housing, 12 Lid, 13 Packing, 14 Cover sealing screw, 15a, 15b, 15c Disassembly prevention screw, 21 Magnetic recording medium, 22 Medium drive unit, 23 Magnetic head, 24 Head drive unit, 31 Gas container, 32 Protrusion, 33 projection fixing part, 35 gas container fixing part, 41 container main body, 42 film, 43 corrosive gas.

Claims (5)

A storage device in which a storage medium is stored in a storage unit, the inside of the storage unit is closed by a lid, and the storage medium is stored in a state of being closed from the outside by the storage unit and the lid,
A screw that penetrates the lid,
A fluid containing portion disposed inside the containing portion and containing a fluid that destroys the storage medium;
The fluid containing portion is disposed opposite to the fluid containing portion, and includes a damaged portion that breaks the fluid containing portion,
A storage device in which one of the fluid containing portion and the damaged portion is provided integrally with the screw. The damaged portion and the fluid container portion are arranged to face each other with a predetermined distance apart in the screw completion state, and the screw moves from the screw completion direction to the removal direction by the predetermined distance. Contact, and the damaged portion breaks the fluid containing portion,
The storage device according to claim 1. The fluid containing portion is provided on an inner wall surface of the lid portion,
The damaged portion is provided between a tip of a fastening portion of the screw and a screw head.
The storage device according to claim 1 or 2. The damaged portion is provided on the inner wall surface of the lid portion,
The fluid containing portion is provided between a tip portion of a screw fastening portion and a screw head.
The storage device according to any one of claims 1 to 3. The screw includes a first screw that fastens a distal end of a fastening portion to the housing portion and fixes the lid portion to the housing portion, and a second screw whose distal end of the fastening portion is located in the internal space of the housing portion. Including at least one,
The storage device according to any one of claims 1 to 4.

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