JP2014123410A - Combinational body of magnetic disk unit and sealing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combinational body of a magnetic disk unit and a sealing body capable of easily realizing a magnetic disk unit with a low density gas encapsulated, at a low cost.SOLUTION: A combinational body 1 of a magnetic disk unit and a sealing body comprises: a magnetic disk unit 10 including a rotatable magnetic disk 12 for recording magnetic information and a magnetic head 14 for recording or reproducing the magnetic information to the magnetic disk 12; and a sealing body 20 sealing the magnetic disk unit 10 with a low density gas having a density lighter than the air. The sealing body 20 includes: a sealing body main body 30; and a wiring function part 50 connected to the magnetic disk unit 10, penetrating through the sealing body main body 30 and extending to an outside of the sealing body main body 30. The wiring function part 50 is bonded to the sealing body main body 30 so as to allow encapsulation of the low density gas.

Description

  The present invention relates to a combination of a magnetic disk device and a sealing body in which the magnetic disk device is sealed together with a low-density gas whose density is lower than that of air.

  2. Description of the Related Art Conventionally, a magnetic disk device (hard disk drive) having a rotatable magnetic disk on which data (magnetic information) is recorded is known. In such a magnetic disk device, when data (magnetic information) is recorded or reproduced on the magnetic disk, the magnetic disk is rotated at a high speed and the magnetic head is moved to a desired track of the magnetic disk. As a result, data is transferred between a desired track of the magnetic disk and the magnetic head, and data is recorded on or reproduced from the magnetic disk.

  Incidentally, in recent years, there has been a strong demand for an increase in recording capacity in magnetic disk devices. For such a request, for example, it is effective to increase the recording capacity per magnetic disk accommodated in the magnetic disk device, that is, to increase the recording density of the magnetic disk. In this case, the flying height of the magnetic head is reduced and stabilized in order to read data recorded on the magnetic disk with high density without error or to write data on the magnetic disk with high density without error. Will be needed. It is also necessary to maintain the position of the magnetic head with high accuracy with respect to the desired track.

  However, when turbulence (wind turbulence) occurs in the airflow generated by the magnetic disk rotating at high speed, there is a problem that the flying height of the magnetic head becomes unstable and it is difficult to reduce the flying height. Further, when the above-described turbulence occurs, there is a problem that the magnetic head vibrates and the position accuracy of the magnetic head deteriorates.

  The magnetic disk is rotated at a high speed by a spindle motor. At this time, the magnetic disk rotates at a high speed with the surrounding air involved. As a result, the air around the magnetic disk acts as rotational resistance (windage loss) of the magnetic disk. In this case, since the spindle motor rotates the magnetic disk at a desired rotational speed against this windage loss, there is a problem that a lot of energy is consumed.

  In order to cope with such a situation, a magnetic disk device in which a low-density gas (for example, helium gas) having a lower density than air is enclosed is known (see, for example, Patent Documents 1 to 3).

  In such a magnetic disk device, since the low density gas is sealed, the periphery of the magnetic disk is filled with the low density gas. As a result, the influence of the turbulence as described above can be reduced, the flying height of the magnetic head can be stabilized, and the flying height can be reduced. Further, since the influence of turbulence can be reduced, the vibration of the magnetic head can be suppressed and the magnetic head can be positioned more accurately. Furthermore, it is possible to reduce the noise of the magnetic disk device.

  Further, since the low-density gas is sealed in the magnetic disk device, the influence of the above-described windage loss can be reduced. In this case, energy consumption by the spindle motor can be reduced. Since helium gas has a higher thermal conductivity than air, helium gas has the advantage that the temperature rise of the magnetic disk device can be reduced.

JP 2009-181681 A JP 2009-277282 A JP 2008-269696 A

  However, in the magnetic disk devices shown in Patent Documents 1 to 3, in order to prevent the helium gas from leaking, the magnetic disk device is connected to the internal wiring in the magnetic disk device and is used for dealing with the external wiring outside the magnetic disk device. The feedthrough is connected to the housing of the magnetic disk device by solder. This complicates the structure and assembly process of the magnetic disk device and increases the cost.

  The present invention has been made in consideration of such points, and is a combination of a magnetic disk device and a sealing body that can easily realize a magnetic disk device filled with a low-density gas at low cost. The purpose is to provide.

  The present invention provides a magnetic disk device having a rotatable magnetic disk for recording magnetic information and a magnetic head for recording or reproducing magnetic information on the magnetic disk, and the magnetic disk device has a density higher than that of air. A sealing body that seals together with a low-density gas, the sealing body being connected to the sealing body main body and the magnetic disk device, and penetrating through the sealing body main body. A wiring function part extending outward of the magnetic disk device, wherein the wiring function part is joined to the sealing body so as to seal the low-density gas. Provide a combination with a stationary body.

  In the above-described combination of the magnetic disk device and the sealing body, the wiring function unit includes a wiring member that transmits magnetic information transmitted and received by the magnetic head, or transmits a power source of the magnetic head, The wiring member may be bonded to the sealing body so as to seal the low density gas.

  Further, in the above-described combination of the magnetic disk device and the sealing body, the wiring function section includes an insulating base section joined to the sealing body main body so as to seal the low density gas, and the insulating base section. A terminal penetrating the base, and the terminal is connected to the magnetic disk device and transmits magnetic information transmitted and received by the magnetic head, or transmits power to the magnetic head. May be.

  Further, in the above-described combination of the magnetic disk device and the sealing body, a heat radiating portion that radiates heat generated in the magnetic disk device to the outside of the sealing body is provided on the outer surface of the sealing body. The thermal radiation part may have a thermal emissivity higher than that of the sealing body.

  Further, in the above-described combination of the magnetic disk device and the sealing body, the sealing body main body has a gusset portion formed by folding a part of the sealing body main body. Also good.

  Further, the combination of the magnetic disk device and the sealing body described above may further include an outer holding structure that holds the magnetic disk device from the outside of the sealing body.

  Further, in the above-described combination of the magnetic disk device and the sealing body, the outer holding structure has a fitting portion that is fitted to the magnetic disk device via the sealing body. It may be.

  Further, in the combination of the magnetic disk device and the sealing body described above, the sealing body main body includes a base material layer formed of a resin material, a barrier layer provided on the base material layer, and the barrier And a sealing layer provided on the layer.

  Further, in the combination of the magnetic disk device and the sealing body described above, the barrier layer is formed of a metal material, and an acid-resistant film layer is interposed between the barrier layer and the seal layer. You may do it.

  Further, in the above-described combination of the magnetic disk device and the sealing body, the sealing body main body may be composed of a single layer formed of a resin material.

  Further, in the above-described combination of the magnetic disk device and the sealing body, the sealing body main body may be made of a metal material.

  According to the present invention, a magnetic disk device in which a low-density gas is sealed can be easily realized at low cost.

FIG. 1 is a perspective view showing a combined body of a magnetic disk device and a sealing body in the embodiment of the present invention. FIG. 2 is a perspective view showing an example of the magnetic disk device of FIG. FIG. 3 is a plan view of the combination of FIG. 4 is a cross-sectional view of the combination of FIG. FIG. 5 is a view showing a laminated configuration of sheet members of the sealing body in the combined body of FIG. FIG. 6 is a perspective view showing a state in which the magnetic disk device is held by the outer holding structure in the combination shown in FIG. FIG. 7 is a cross-sectional view of the combination of FIG. FIGS. 8A to 8G are views for explaining a method of manufacturing the combination shown in FIG. Fig.9 (a) is a top view which shows the modification (modification 1) of the assembly in embodiment of this invention, FIG.9 (b) shows the detail of the wiring function member of Fig.9 (a). FIG. FIG. 10 is a cross-sectional view showing a modified example (modified example 2) of the sheet member in the embodiment of the present invention. FIG. 11 is a perspective view showing a modified example (modified example 3) of the combined body in the embodiment of the present invention. FIG. 12 is a cross-sectional view showing a modified example (modified example 4) of the combined body according to the embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale and the vertical / horizontal dimensional ratio are appropriately changed and exaggerated from those of the actual ones.

  As shown in FIG. 1, an assembly (hereinafter simply referred to as an assembly) 1 of a magnetic disk device and a sealing body includes a magnetic disk device 10 and a low-density gas whose density is lower than that of air. And a sealed body 20 sealed together.

  First, the magnetic disk device 10 will be described with reference to FIG.

  As shown in FIG. 2, a magnetic disk device 10 includes a case 11, a rotatable magnetic disk 12 that is rotatably attached to the case 11 and records data (magnetic information), and a spindle that rotates the magnetic disk 12. A motor 13 and a magnetic head 14 for recording or reproducing data with respect to the magnetic disk 12 are provided. Note that a cover (not shown) that covers the magnetic disk 12 and the like is attached to the case 11, but in FIG. 2, the cover is omitted for the sake of clarity.

  The magnetic head 14 is mounted on the distal end portion (gimbal portion) of the suspension 15 having flexibility. When recording or reproducing data on the magnetic disk 12, the magnetic disk 12 rotates at a high speed by driving the spindle motor 13, and an airflow is generated by the rotation of the magnetic disk 12. Under the influence of this air flow, the magnetic head 14 is close to the magnetic disk 12 while maintaining a desired flying height (flying height) with respect to the magnetic disk 12, and between the magnetic disk 12 and the magnetic head 14. Data is delivered. In this way, data is recorded or reproduced.

  A voice coil motor 16 for moving the magnetic head 14 to a desired position is provided in the case 11. The voice coil motor 16 is connected to a suspension 15 on which a magnetic head 14 is mounted via an arm 17, and the suspension 15 is swung via the arm 17 to move the magnetic head 14 to a desired position on the magnetic disk 12. It is supposed to be moved to the position.

  Further, the internal wiring (not shown) of the magnetic disk device 10 is connected to a case side connector (not shown) provided in the case 11. This wiring is connected to the magnetic head 14 via a wiring (not shown) of the suspension 15 and is also connected to the spindle motor 13 and the voice coil motor 16. The case-side connector is connected to an external wiring 201 (see FIG. 9A) of an external device 200 (for example, a personal computer, see FIG. 6) to which the magnetic disk device 10 is mounted. . As a result, data transmission and power supply to the magnetic head 14, the spindle motor 13, and the voice coil motor 16 are performed between the magnetic head 14 and the external wiring 201.

  Next, the low density gas will be described.

  As described above, the magnetic disk device 10 is sealed together with the low-density gas in a sealing bag 30 described later of the sealing body 20. As a result, the low density gas is sealed in the magnetic disk device 10. For this reason, even when turbulence (wind turbulence) occurs in the airflow generated by the magnetic disk 12 rotating at high speed, the flying height of the magnetic head 14 is suppressed from becoming unstable, and the flying height is reduced. Can do. Further, the vibration of the magnetic head 14 due to the turbulence described above can be suppressed, and the positional accuracy of the magnetic head 14 can be improved. In this way, signals can be stably read from a magnetic disk recorded with high density, data can be written to the magnetic disk with high density, and the recording capacity of the magnetic disk can be increased. . Furthermore, the rotational resistance (windage loss) of the magnetic disk 12 can be reduced, and the energy consumed by the spindle motor 13 can be reduced.

  As such a low density gas, any gas having a lower density than air may be used. For example, helium gas, hydrogen gas, nitrogen gas, or the like can be used. In particular, it is preferable to use helium gas having a low density, inert, and high safety. The low-density gas is not limited to using a single type of gas as long as the overall density is lower than that of air. For example, a mixed gas in which air or nitrogen gas is mixed with helium gas may be used. Is possible.

  The low-density gas is preferably sealed in the sealing bag 30 at, for example, 1.0 to 1.3 atm. Accordingly, the pressure of the low density gas in the sealing bag 30 can be made equal to or slightly higher than the pressure of the outside air (atmospheric pressure), and the outside air can enter the sealing bag 30. Can be prevented.

  Next, the sealing body 20 is demonstrated using FIG.1, FIG3 and FIG.4.

  As shown in FIGS. 1, 3, and 4, the sealing body 20 is connected to the sealing bag (sealing body main body) 30 and the magnetic disk device 10, and seals through the sealing body bag 30. And a wiring function part 50 extending to the outside of the bag 30.

  Among these, the sealing bag 30 has a pair of rectangular sheet members 31 and a joint portion 32 formed by joining the peripheral portions of the sheet members 31 to each other. Between the pair of sheet members 31, an accommodation space 33 is formed that is surrounded by the joint portion 32 and accommodates the magnetic disk device 10.

  The wiring function part 50 is joined to the sealing bag 30 so that low density gas can be sealed. In the present embodiment, the wiring function unit 50 includes a wiring member 51 that transmits magnetic information transmitted and received by the magnetic head 14 (see FIG. 2) or transmits power to the magnetic head 14. The wiring member 51 is airtightly bonded to the sealing bag 30 so that a low density gas can be sealed. More specifically, as shown in FIG. 4, the wiring member 51 is interposed between the pair of sheet members 31 of the sealing bag 30 and joined to each sheet member 31 by the joining portion 32. Yes. In addition, the wiring member 51 includes a plurality of conductive wires, and the plurality of conductive wires are integrated with an insulating coating material or the like in order to improve the heat sealability between the sealing bag 30 and the wiring member 51. Is preferred. Such an insulating coating material is not particularly limited as long as it is a resin material having a heat sealing property capable of sealing a low-density gas with respect to a seal layer 42 described later of the sheet member 31.

  Note that connectors 52 a and 52 b are connected to both ends of the wiring member 51. As a result, one connector 52a is connected to the above-mentioned case-side connector of the magnetic disk device 10, and the other connector 52b is connected to the above-described external wiring 201 (see FIG. 9A) of the external device 200. It has become so.

  Next, the sheet member 31 constituting the sealing bag 30 will be described. In the present embodiment, as shown in FIG. 5, the sheet member 31 of the sealing bag 30 includes a base material layer 40 formed of a resin material, a barrier layer 41 provided on the base material layer 40, And a sealing layer 42 provided on the barrier layer 41. The base material layer 40 of the sheet member 31 is disposed on the outer side when the sealing bag 30 is configured, and the sealing layer 42 is disposed on the inner side. Between the barrier layer 41 and the seal layer 42, an acid resistant film layer 43 is interposed.

  Below, the material of each layer is demonstrated.

  Even when the base material layer 40 is in direct contact with each part of the external device 200, the base material layer 40 is formed of an insulating resin material in order to ensure insulation between the part and the magnetic disk device 10. It is preferable. For example, the base material layer 40 is preferably formed of stretched polyester or nylon film. Among these, examples of the polyester resin include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, copolymer polyester, and polycarbonate. Examples of the nylon resin include polyamide resins, that is, nylon 6, nylon 6,6, a copolymer of nylon 6,6 and nylon 6, nylon 6,10, polymetaxylylene adipamide (MXD6), and the like. .

  The thickness of the base material layer 40 is preferably 6 μm or more, and particularly preferably 12 μm to 30 μm. As a result, even if a pinhole exists in the base material layer 40 or a pinhole is generated when the magnetic disk device 10 is sealed, the pinhole penetrates the base layer. It can prevent that the function of the material layer 40 is impaired.

Moreover, the base material layer 40 may be laminated | stacked by the some layer in order to improve pinhole resistance and insulation. In this case, the thickness of each layer can be 6 μm or more, preferably 12 to 25 μm. Examples of laminating the base material layer 40 include the following 1) to 8), although not shown. Among these, the examples of 3) to 8) are examples of the base material layer 40 in consideration of the mechanical suitability of the sealing bag 30 (stability of conveyance in the sealing machine) and the surface protection (heat resistance). In this example, a fluorine resin layer, an acrylic resin layer, a silicone resin layer, or a resin layer made of a mixture thereof is provided on the surface.
1) Stretched polyethylene terephthalate / stretched nylon 2) Stretched nylon / stretched polyethylene terephthalate 3) Fluorine resin / stretched polyethylene terephthalate (Fluorine resin is formed by coating with a film or liquid material and then drying)
4) Silicone resin / stretched polyethylene terephthalate (silicone resin is formed by a film or by drying after coating a liquid material)
5) Fluorine-based resin / stretched polyethylene terephthalate / stretched nylon 6) Silicone-based resin / stretched polyethylene terephthalate / stretched nylon 7) Acrylic resin / stretched nylon (acrylic resin is dried after being coated with a film or liquid material, Formed by curing)
8) Acrylic resin + polysiloxane graft acrylic resin / stretched nylon (acrylic resin is formed by film or by drying and curing after coating liquid material)

  The barrier layer 41 is a layer for preventing water vapor or the like from entering from the outside to the inside through the sealing bag 30. Examples of the material used for the barrier layer 41 include a metal material such as aluminum and nickel, or a film on which an inorganic compound such as silicon oxide or alumina is deposited. In particular, as the barrier layer 41, an aluminum foil having a thickness of 15 μm or more, particularly 15 μm to 80 μm is used in order to stabilize pinholes as a single layer of the barrier layer 41 and processability (pouching). Is preferred.

  In order to further reduce the occurrence of pinholes, the aluminum used as the barrier layer 41 contains 0.3 wt% to 9.0 wt% iron, especially 0.7 wt% to 2.0 wt% iron. It is preferable. In this case, as compared with aluminum containing no iron, the spreadability of aluminum can be improved, and the occurrence of pinholes when bent can be prevented. By making the iron content 0.3% by weight or more, pinholes can be prevented from occurring, and by making the iron content 9.0% by weight or less, the flexibility is prevented from being inhibited. And it can prevent that bag-making property deteriorates.

  In addition, aluminum manufactured by cold rolling changes its flexibility, elasticity, and hardness under annealing (so-called annealing treatment) conditions. For this reason, flexible and softly treated aluminum that is appropriately annealed is preferable to hard-treated products that are not annealed. Note that the degree of flexibility, elasticity, and hardness, that is, the conditions for annealing, may be appropriately selected according to the suitability for processing (pouching). For example, in order to prevent wrinkling, aluminum that is softer with a slight or complete annealing treatment is better than hard aluminum that has not been annealed.

  As the barrier layer 41, a clay film can also be used. The clay film can be formed by forming a clay material in a paste form using a resin binder (polyamide resin such as nylon, polyimide, etc.), coating the entire surface of the base material layer 40, and drying and heating to cure. it can. Such a clay film can be densely formed and can have gas barrier properties, water vapor barrier properties, heat resistance, and flexibility.

  The seal layer 42 may be a material that can have heat sealability with respect to the wiring member 51 while the seal layers 42 have heat sealability. The sealing layer 42 preferably has a melting point of 80 ° C. or higher and a Vicat softening point of 70 ° C. or higher. Examples of the material used for the seal layer 42 include unsaturated carboxylic graft polyolefin resins such as unsaturated carboxylic graft polyethylene, unsaturated carboxylic graft polypropylene, and unsaturated carboxylic graft polymethylpentene, metal ion-crosslinked polyethylene, ethylene or It is preferable to contain at least one of a copolymer of propylene and acrylic acid or methacrylic acid, and a modified product thereof. In particular, the unsaturated carboxylic graft polyolefin resin is suitable for any of adhesiveness, heat resistance, cold resistance, and processability (pouching).

  The seal layer 42 has a thickness of 10 μm or more, preferably 20 to 100 μm. By setting the thickness of the sealing layer 42 to 20 μm or more, it is possible to prevent a gap from being formed between the outer peripheral surface of the wiring member 51 and the sheet member 31 when the wiring member 51 is heat-sealed. Moreover, by setting the thickness of the sealing layer 42 to 100 μm or less, it is possible to have a predetermined heat seal strength and to suppress an increase in the thickness of the sealing bag 30. Further, by setting the melting point to 80 ° C. or higher and the Vicat softening point to 70 ° C. or higher, heat resistance and cold resistance can be ensured, and a decrease in adhesive strength between the wiring member 51 and the sheet member 31 is prevented. it can.

  The sealing layer 42 may be a single layer formed of any of the resin materials described above or a material obtained by mixing a plurality of resin materials. Furthermore, the sealing layer 42 may be configured to include two or more layers formed of the above-described resin material.

  Further, an adhesive resin layer 44 may be interposed between the seal layer 42 and the acid resistant film layer 43. Thereby, the adhesiveness between the seal layer 42 and the acid resistant film layer 43 can be further improved. In this case, it is preferable to use acid-modified polypropylene as a material used for the adhesive resin layer 44.

  Between the wiring member 51 and the seal layer 42, an adhesive film (not shown) formed from the above-mentioned unsaturated carboxylic graft polyolefin, metal-crosslinked polyethylene, or a copolymer of ethylene or propylene and acrylic acid or methacrylic acid. May be interposed. As a result, the wiring member 51 and the sealing bag 30 can be bonded to each other more reliably, and the sealing performance can be improved. The adhesive film can be set on the wiring member 51 by interposing an adhesive film between the wiring member 51 and the seal layer 42, or by winding an adhesive film around a predetermined position of the wiring member 51. Good. The thickness of such an adhesive film is preferably 15 μm or more.

  For each layer of the sheet member 31 described above, corona treatment, blast treatment, oxidation treatment, and ozone treatment are performed as appropriate in order to improve and stabilize film forming properties, lamination processing, and final product secondary processing (pouching) suitability. A surface activation treatment such as the above may be performed.

  As a method for forming the sheet member 31, specifically, a T-die method, an inflation method, a coextrusion method, or the like can be used. If necessary, a method such as coating, vapor deposition, ultraviolet curing, or electron beam curing may be used. Moreover, as a bonding method, methods such as a dry laminating method, a sandwich laminating method, an extrusion laminating method, a coextrusion laminating method, and a thermal laminating method can be used.

  When laminating by the dry laminating method, polyester, polyethyleneimine, polyether, cyanoacrylate, urethane, organic titanium, polyetherurethane, epoxy, polyesterurethane, imide, isocyanate Various adhesives based on polyolefin, polyolefin, and silicone can be used. In addition, silicon oxide, calcium carbonate, zinc, lead tan, lead suboxide, lead oxide, cyanamide lead, zinc chromate, barium potassium chromate, barium zinc chromate are suitably used for the adhesive layer formed by these adhesives. An additive containing at least one of the above may be added. In this case, chemical resistance and organic solvent resistance can be further improved.

  Moreover, when using the extrusion laminating method, as an adhesion promoting method for stabilizing the adhesive force between each layer to be bonded, polyester-based, polyether-based, urethane-based, polyether-urethane-based, polyester-urethane-based, isocyanate-based, polyolefin-based, Applying a resin such as polyethyleneimine, cyanoarylate, organotitanium compound, epoxy, imide, silicone, modified products or mixtures thereof, about 1 μm, or surface activation treatment by ozone treatment It is preferable to carry out. Moreover, you may use unsaturated carboxylic acid graft polyolefin as a resin material at the time of bonding by the extrusion lamination method or the thermal lamination method. In this case, adhesiveness can be improved.

  The sheet member 31 of the sealing bag 30 is not limited to the layer configuration described above. For example, the sheet member 31 may be composed of a single layer formed of a resin material. In this case, the layer configuration of the sheet member 31 can be simplified and the manufacturing cost can be reduced. In addition, the thickness of the sheet member 31 in this case is not particularly limited as long as low density gas can be prevented from passing through the sheet member 31.

  Next, the outer holding structure 60 that holds the magnetic disk device 10 will be described with reference to FIGS. 6 and 7.

  As shown in FIGS. 6 and 7, the magnetic disk device 10 is held by an outer holding structure 60 from the outside of the sealing bag 30 described above. Here, the case 11 of the magnetic disk device 10 located inside the sealing bag 30 is generally formed as a casing of a metal material. As a result, the case 11 prevents components of the magnetic disk device 10 such as the magnetic disk 12 and the magnetic head 14 from coming into contact with the sealing bag 30. However, when the outer holding structure 60 is used, the case 11 is formed as a casing with a material other than a metal material if it is possible to prevent components such as the magnetic disk 12 from coming into contact with the sealing bag 30. It may be. Furthermore, when the outer holding structure 60 is used, the component parts such as the magnetic disk 12 are not limited to being attached to the case 11 formed as a casing, and the component parts such as the magnetic disk 12 are For example, the magnetic disk apparatus 10 may be sealed in the sealing bag 30 by being attached to a frame-shaped member.

  In the present embodiment, the outer holding structure 60 includes a first holding member 61 that fits into the magnetic disk device 10 via the sealing bag 30 and a second holding member 62 that fits into the first holding member 61. And have. Among these, the 1st holding member 61 is formed in the rectangular frame shape, the 1st fitting part (fitting part) 61a is provided inside the 1st holding member 61, and the said 1st fitting part 61a is provided. The case 11 (see FIG. 2) of the magnetic disk device 10 sealed in the sealing bag 30 is fitted. Here, the first fitting portion 61 a is fitted to the magnetic disk device 10 sealed in the sealing bag 30 to such an extent that the sealing bag 30 is not damaged.

  The 2nd holding member 62 is formed in the rectangular frame shape similarly to the 1st holding member 61, the 2nd fitting part 62a is provided inside the 2nd holding member 62, and the 2nd fitting part 62a The outer surface of the first holding member 61 is fitted through the joint portion 32 of the sealing bag 30 that is bent along the outer surface of the first holding member 61. Here, the second fitting portion 62a is preferably fitted to such an extent that the joint portion 32 of the sealing bag 30 is not damaged.

  It is preferable that the first holding member 61 and the second holding member 62 can be fixed to each other by a bolt or the like. Thus, the magnetic disk device 10 can be reliably held by the outer holding structure 60 having the first holding member 61 and the second holding member 62.

  The outer holding structure 60 is preferably configured such that the magnetic disk device 10 can be attached to the external device 200. For example, as shown in FIG. 6, an outer holding structure 60 that holds the magnetic disk device 10 is inserted between a pair of guide rails 202 of the external device 200 and can be fixed to the external device 200. Is preferred. Alternatively, the outer holding structure 60 is provided with a mounting portion (for example, a bolt mounting hole or the like, not shown), and the outer holding structure 60 that holds the magnetic disk device 10 is fixed to the external device 200. You may make it do. In this way, the magnetic disk device 10 sealed together with the low density gas by the sealing bag 30 can be mounted on the external device 200.

  The first holding member 61 and the second holding member 62 are not limited to being formed in a frame shape. For example, although not shown, the first holding member 61 and the second holding member 62 may be formed so as to prevent the sealing bag 30 from being exposed to the outside. In this case, since the sealing bag 30 is not exposed, damage to the sealing bag 30 can be further prevented. In this case, the configuration of the sheet member 31 can be simplified.

  The outer holding structure 60 is not limited to the form having the first holding member 61 and the second holding member 62 as shown in FIGS. 6 and 7, and the magnetic disk sealed in the sealing bag 30. Any configuration can be used as long as the device 10 can be held.

  Next, the manufacturing method of the assembly 1 in this Embodiment which consists of such a structure is demonstrated using FIG.

  First, as shown in FIG. 8A, the wiring member 51 of the wiring function unit 50 is connected to the magnetic disk device 10. At this time, one connector 52 a coupled to the wiring member 51 is connected to a case-side connector (not shown) of the magnetic disk device 10.

  Subsequently, the magnetic disk device 10 to which the wiring member 51 is connected is placed on one sheet member 31 of the pair of sheet members 31 forming the sealing bag 30 (see FIG. 8B).

  Next, the other sheet member 31 is placed on the magnetic disk device 10 on the sheet member 31 (see FIG. 8C).

  Thereafter, three side edges of the pair of sheet members 31 are joined by heat sealing to form a joined portion 32 (see FIG. 8D). At this time, an accommodation space 33 in which the magnetic disk device 10 is accommodated is formed. In FIG. 8D, the side edge where the wiring member 51 exists is opened without being joined, but the side edge to be opened is not limited to this part.

  Next, the air in the accommodation space 33 is replaced with a low density gas. In this case, first, the pair of sheet members 31 are arranged in a chamber (not shown) of the sealing device together with the magnetic disk device 10. Subsequently, the inside of the chamber is evacuated, and air is discharged from the accommodation space 33 (see FIG. 8E). Thereafter, a low density gas is supplied into the chamber, and the accommodation space 33 is filled with the low density gas (see FIG. 8F). In this way, the air in the accommodation space 33 is replaced with the low density gas. Note that the steps shown in FIGS. 8B and 8C may be performed in the above-described chamber.

  After the air in the accommodation space 33 is replaced with a low-density gas, the remaining side edges that are open are joined by heat sealing to form a joined portion 32 (see FIG. 8G). At this time, the side edge portion is heat-sealed in an atmosphere of low-density gas in the above-described chamber replaced with low-density gas. Thus, the sealing bag 30 is formed, and the low density gas can be sealed in the sealing bag 30 together with the magnetic disk device 10. In this way, the combined body 1 shown in FIGS. 2 to 4 is obtained.

  The outer holding structure 60 is attached to the magnetic disk device 10 of the combination 1 obtained in this way (see FIGS. 6 and 7). At this time, first, the first fitting portion 61 a of the first holding member 61 of the outer holding structure 60 is fitted into the magnetic disk device 10 sealed in the sealing bag 30. Subsequently, the second fitting portion 62 a of the second holding member 62 of the outer holding structure 60 is first held via the joint portion 32 of the sealing bag 30 that is bent along the outer surface of the first holding member 61. The member 61 is fitted. Thereafter, the first holding member 61 and the second holding member 62 are fixed to each other by a bolt or the like. In this way, the magnetic disk device 10 is held by the outer holding structure 60 from the outside of the sealing bag 30.

  After the outer holding structure 60 is attached, the magnetic disk device 10 is mounted on the external device 200 (see FIG. 6). In addition, the external wiring 201 (see FIG. 9A) of the external device 200 is connected to the other connector 52b connected to the wiring member 51. In this way, the magnetic disk device 10 that is sealed in the sealing bag 30 and held in the outer holding structure 60 can be mounted on the external device 200.

  As described above, according to the present embodiment, the magnetic disk device 10 is sealed in the sealing bag 30 together with the low density gas, and the wiring member 51 of the wiring function unit 50 connected to the magnetic disk device 10 is sealed in the sealing bag. The sealing bag 30 is penetrated by bonding a low density gas to 30 so as to be sealed. As a result, the low density gas can be sealed in the magnetic disk device 10. For this reason, it is not necessary to solder or weld the case 11 of the magnetic disk device 10 to seal the low density gas, and the magnetic disk device 10 filled with the low density gas can be reduced. It can be easily realized at a low cost. Further, since the low density gas is sealed by the sealing bag 30, it is possible to prevent dust and the like from being generated, to prevent the cleanliness of the low density gas from being lowered, and to improve the reliability of the magnetic disk device 10. be able to.

  Further, according to the present embodiment, as described above, the low-density gas can be sealed in the magnetic disk device 10 using the sealing bag 30. This eliminates the need for modification or design change of the magnetic disk device 10 for enclosing the low-density gas, and allows the low-density gas to be easily enclosed in the conventional magnetic disk device 10.

  In addition, according to the present embodiment, the wiring function unit 50 includes the wiring member 51 that transmits magnetic information transmitted and received by the magnetic head 14 or transmits power to the magnetic head 14. The member 51 is joined to the sealing bag 30 so that a low density gas can be sealed. Thus, transmission of magnetic information or the magnetic head 14 is performed between the external device 200 to which the magnetic disk device 10 is mounted and the magnetic disk device 10 through the sealing bag 30 in which low density gas is sealed. Power supply to can be realized.

  Furthermore, according to the present embodiment, the sealing bag 30 includes the base material layer 40, the barrier layer 41, and the sealing layer 42. Thus, the sealing bag 30 can have insulating performance, strength, and the like, and can prevent water vapor and the like from entering the sealing bag 30. For this reason, while being able to prevent the sealed low density gas from leaking outside from the sealing bag 30, it is possible to prevent the low density gas in the sealing bag 30 from being replaced with outside air.

  Further, according to the present embodiment, the acid-resistant film layer 43 is interposed between the barrier layer 41 and the seal layer 42 formed of a metal material. As a result, the adhesion between the barrier layer 41 and the seal layer 42 can be stabilized.

  Although the embodiments of the present invention have been described in detail above, the combination of the magnetic disk device and the sealing body for the magnetic disk device according to the present invention is not limited to the above-described embodiments at all. Various modifications can be made without departing from the spirit of the invention.

  For example, in the present embodiment described above, the wiring member 51 constituting the wiring function unit 50 penetrates the sealing bag 30 and is joined to the sealing bag 30 so as to seal low density gas. An example was described. However, the present invention is not limited to this, and as shown in FIGS. 9A and 9B, the insulating layer in which the wiring function unit 50 is bonded to the sealing bag 30 so as to seal a low density gas. You may have the base part 71 and the some terminal (pin) 72 which penetrates the insulation base part 71 (modification 1). Of these, the insulating base portion 71 is formed of an insulating material. Each terminal 72 is connected to an internal wiring 73 extending from the magnetic disk device 10 and to an external wiring 201 of the external device 200 to which the magnetic disk device 10 is mounted. In this way, each terminal 72 transmits magnetic information transmitted / received by the magnetic head 14 of the magnetic disk device 10 or transmits power to the magnetic head 14. Each terminal 72 is joined to the insulating base portion 71 so as to be able to seal a low-density gas, and functions as a part of a wiring path between the external device 200 and the magnetic disk device 10.

  In the first modification shown in FIG. 9, since the plurality of terminals 72 are bonded to the insulating base portion 71, when the wiring function portion 50 is bonded to the sealing bag 30 by heat sealing, the wiring function portion 50 and the sealing are sealed. It is possible to further prevent a gap from being formed between the bag 30 and the bag 30. Thereby, the sealing property of the low density gas between the wiring function part 50 and the sealing bag 30 can be further improved. In this case, it is preferable that the insulating base portion 71 has a shape that can further improve the sealing performance of the low-density gas, such as a cylindrical shape.

  Moreover, in this Embodiment mentioned above, as shown in FIG. 10, you may make it provide the thermal radiation part 80 in the outer surface of the sealing bag 30 (modification 2). The heat radiating unit 80 has a higher heat emissivity than the sealing bag 30 and radiates heat generated in the magnetic disk device 10 to the outside of the sealing bag 30. Such a heat radiating portion 80 is formed by laminating a film of a resin material forming the heat radiating portion 80 on the outer surface of the sealing bag 30, that is, the outer surface of the base material layer 40 of the sheet member 31 (upper surface shown in FIG. 10). Alternatively, it can be formed by coating the outer surface of the base material layer 40 with the resin material. As a resin material for forming the thermal radiation part 80, a material obtained by mixing various infrared radiation fillers with various binder resins can be used.

  The binder resin is not particularly limited, but is a resin having a hydroxyl group for reacting with a polyisocyanate compound. Specific examples include a crosslinkable substituent-containing acrylic resin and a crosslinkable substitution-containing fluororesin. Crosslinkable substituent-containing vinyl resins, crosslinkable substituent-containing olefin resins, and the like can be suitably used. The far-infrared radiation filler described above includes alumina, silicon oxide, zirconium oxide, titanium oxide, magnesium oxide, calcium fluoride, aluminum nitride, silicon nitride, calcium carbonate, iron oxide, barium sulfate, aluminum powder, mica, carbonic acid. Barium, talc and the like can be preferably used. Among these far infrared radiation filler materials, titanium oxide, silicon oxide, aluminum oxide, magnesium oxide, and barium sulfate are preferably used from the viewpoint of heat dissipation.

  The heat radiation part 80 is preferably formed in a layered manner on the outer surface of the base material layer 40. The thickness of the heat radiation part 80 may be determined as appropriate in consideration of the thickness required for the sheet member 31 of the sealing bag 30 and is not particularly limited, but is 5 μm to 100 μm. It is preferable. When the thickness of the heat radiation portion 80 is 5 μm or more, heat dissipation can be exhibited. And can be manufactured at low cost. In addition, although the heat radiation part 80 may be formed in a layer shape on the entire outer surface of the base material layer 40, it is not limited thereto, and may be formed partially on the outer surface of the base material layer 40. Good.

  The heat radiating section 80 is made of a resin material other than the above-described resin materials or various plastic blends as long as it does not harm the base material layer 40, the barrier layer 41, and the seal layer 42 of the sheet member 31. An agent, an additive, etc. can be added.

  For example, the heat radiation unit 80 may include a binder resin using an acrylic polyol resin as a main agent and a polyisocyanate compound as a curing agent. The heat radiation part 80 may contain an inorganic filler such as titanium oxide, aluminum oxide or silicon oxide as a colorant or an antiblocking agent, or may contain an organic filler such as phthalocyanine or acrylic resin beads. A thermal radiation ink mixed with a hydrocarbon solvent such as xylene or a ketone solvent such as methyl ethyl ketone (MEK) is prepared, and the produced thermal radiation ink is coated on the outer surface of the base material layer 40 by a general coating method. It can be formed by coating.

  The thermal emissivity of the thermal radiation unit 80 is preferably 0.9 or more. In this case, the heat emissivity of the heat radiation unit 80 can be made higher than the heat emissivity of the sealing bag 30, and the temperature rise of the magnetic disk device 10 is effectively suppressed by the heat radiation from the heat radiation unit 80. can do.

  In the second modification shown in FIG. 10, a magnetic radiation sealed in the sealing bag 30 is provided on the outer surface of the sealing bag 30 by providing a heat radiation portion 80 having a higher heat emissivity than that of the sealing bag 30. Heat generated in the disk device 10 can be efficiently radiated to the outside of the sealing bag 30. For this reason, the temperature rise of the magnetic disk device 10 sealed in the sealing bag 30 can be suppressed. Further, when helium gas is used as the low density gas, the helium gas has higher thermal conductivity than air, so that the temperature increase of the magnetic disk device 10 sealed in the sealing bag 30 is effectively suppressed. be able to.

  Moreover, in this Embodiment mentioned above, the example in which the sealing bag 30 was formed by joining a pair of sheet | seat member 31 was demonstrated. However, the configuration of the sealing bag 30 is not limited to this.

  For example, the sealing bag 30 may be formed into a bag shape by folding a single rectangular sheet and joining the three side edge portions by heat sealing to form the joint portion 32. In this case, the area | region of the junction part 32 can be reduced and the sealing performance of the low density gas of the sealing bag 30 can be improved. Alternatively, a tube-shaped (tubular) film can be used to join the both end portions by heat sealing to form the joint portion 32 to form a bag. In this case, the area | region of the junction part 32 can be reduced further, and the sealing performance of the low density gas of the sealing bag 30 can be improved further.

  Moreover, the sealing bag 30 may have a gusset part (gusset) 90 formed by folding a part of the sealing bag 30 as shown in FIG. 11 (Modification 3). Such a sealing bag 30 can form the joining part 32 by joining both ends by heat sealing, for example using the tube-shaped film bent in order to form the gusset part 90. FIG.

  In the third modification shown in FIG. 11, even when the pressure of the low-density gas sealed in the sealing bag 30 increases due to a temperature rise or the like of the magnetic disk device 10, it is absorbed by the gusset unit 90. Can do. For this reason, it can suppress that the peeling force by a pressure rise is loaded to the junction part 32 of the sealing bag 30, and can prevent further that the sealing bag 30 is damaged.

  Moreover, the sealing body main body (sealing case) 100 of the sealing body 20 may be formed in the box shape with the metal material, as shown in FIG. 12 (modification 4). In this case, the sealing case 100 can be given rigidity, and the low density gas can be prevented from passing through the metal material of the sealing case 100.

  When the sealing case 100 is formed of a metal material, the sealing case 100 accommodates the magnetic disk device 10, a container having an opening through which the magnetic disk device 10 can pass, and an opening of the container closed. And a lid (both not shown). The magnetic disk device 10 is fixed inside the container. After housing the magnetic disk device 10 in the housing, the lid is attached to the opening of the housing by, for example, welding, and closes the opening. The wiring function unit 50 can penetrate the lid body and use a solder to join the low density gas to the lid body in a sealable manner. The configuration of the sealing case 100 is not limited to the above-described configuration as long as the magnetic disk device 10 can be sealed.

  In the modification 4 shown in FIG. 12, since the sealing case 100 is formed of a metal material, it is possible to further prevent the low density gas from leaking to the outside due to the sealing case 100 being damaged or the like.

  Furthermore, in the above-described embodiment, the example in which the magnetic disk device 10 sealed by the sealing body 20 is held by the outer holding structure 60 has been described. However, the present invention is not limited to this. For example, although not shown, a mounting portion (for example, a bolt mounting hole) for mounting the magnetic disk device 10 to the external device 200 at the joint portion 32 of the sealing bag 30 Etc.) may be provided. In this case, the magnetic disk device 10 can be fixed to the external device 200 without using the outer holding structure 60. In other words, the magnetic disk device 10 sealed together with the low density gas by the sealing bag 30 can be attached to the external device 200. Further, by attaching such an attaching portion to the joint portion 32 of the sealing bag 30, it is possible to prevent low density gas from leaking from the sealing bag 30.

DESCRIPTION OF SYMBOLS 1 Combination of magnetic disk apparatus and sealing body 10 Magnetic disk apparatus 12 Magnetic disk 14 Magnetic head 20 Sealing body 30 Sealing bag 40 Base material layer 41 Barrier layer 42 Seal layer 43 Acid-resistant film layer 50 Wiring function part 51 Wiring member 60 Outer holding structure 61a First fitting portion 71 Insulating base portion 72 Terminal 80 Heat radiation portion 90 Gusset portion 100 Sealing case

Claims (11)

A magnetic disk device comprising: a rotatable magnetic disk for recording magnetic information; and a magnetic head for recording or reproducing magnetic information on the magnetic disk;
A sealing body that seals the magnetic disk device together with a low-density gas having a lower density than air; and
The sealing body includes a sealing body main body, and a wiring function unit that is connected to the magnetic disk device, extends through the sealing body main body, and extends to the outside of the sealing body main body.
The said wiring function part is joined to the said sealing body main body so that the said low-density gas can be sealed, The combination of the magnetic disk apparatus and sealing body characterized by the above-mentioned. The wiring function unit includes a wiring member that transmits magnetic information transmitted and received by the magnetic head, or transmits a power source of the magnetic head,
2. The combination of a magnetic disk device and a sealing body according to claim 1, wherein the wiring member is joined to the sealing body main body so as to be able to seal the low-density gas. The wiring function part has an insulating base part joined to the sealing body main body so that the low-density gas can be sealed, and a terminal penetrating the insulating base part,
2. The magnetic disk device according to claim 1, wherein the terminal is connected to the magnetic disk device and transmits magnetic information transmitted and received by the magnetic head, or transmits power to the magnetic head. A combination with a sealing body. A heat radiating portion that radiates heat generated in the magnetic disk device to the outside of the sealing body is provided on the outer surface of the sealing body.
4. The magnetic disk apparatus according to claim 1, wherein the thermal radiation portion has a thermal emissivity higher than that of the sealing body. 5. Union.   5. The magnetic disk apparatus according to claim 1, wherein the sealing body has a gusset portion formed by folding a part of the sealing body. A combination with a stationary body.   6. The combination of a magnetic disk device and a sealing body according to claim 1, further comprising an outer holding structure that holds the magnetic disk device from the outside of the sealing body. body.   The magnetic disk device and the sealing body according to claim 6, wherein the outer holding structure has a fitting portion that is fitted to the magnetic disk device via the sealing body. The union.   The sealing body has a base material layer formed of a resin material, a barrier layer provided on the base material layer, and a seal layer provided on the barrier layer. 8. A combination of a magnetic disk device according to claim 1 and a sealing body. The barrier layer is formed of a metal material,
9. The combination of a magnetic disk device and a sealing body according to claim 8, wherein an acid-resistant film layer is interposed between the barrier layer and the seal layer.   The combined body of a magnetic disk device and a sealing body according to any one of claims 1 to 7, wherein the sealing body main body is formed of a single layer formed of a resin material.   The combined body of a magnetic disk device and a sealing body according to any one of claims 1 to 7, wherein the sealing body main body is formed of a metal material.

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