WO2024070952A1 - Cover and recording device utilizing said cover - Google Patents

Cover and recording device utilizing said cover Download PDF

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Publication number
WO2024070952A1
WO2024070952A1 PCT/JP2023/034526 JP2023034526W WO2024070952A1 WO 2024070952 A1 WO2024070952 A1 WO 2024070952A1 JP 2023034526 W JP2023034526 W JP 2023034526W WO 2024070952 A1 WO2024070952 A1 WO 2024070952A1
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WO
WIPO (PCT)
Prior art keywords
layer
cover
width
narrow
gasket
Prior art date
Application number
PCT/JP2023/034526
Other languages
French (fr)
Japanese (ja)
Inventor
俊充 荒木
収 大河原
充博 近藤
亘 宮崎
Original Assignee
日本発條株式会社
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Application filed by 日本発條株式会社 filed Critical 日本発條株式会社
Publication of WO2024070952A1 publication Critical patent/WO2024070952A1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust

Definitions

  • the present invention relates to a cover for a recording device such as a hard disk drive and a recording device using this cover.
  • Hard disk drives which are used as recording devices, house the internal mechanisms, including the disk that serves as the recording medium, in a space that must be sealed to prevent dust, moisture, etc. from entering.
  • a gasket is generally provided between the base and cover of the housing that defines the space (see, for example, Patent Document 1).
  • the gasket is provided in a circumferential shape along the outer periphery of the cover that is received on the base, and is compressed between the cover and the base.
  • this gasket may have a narrow portion where the width is narrowed partially on the inside and outside of the circumference.
  • the narrow portion can be easily set by changing the discharge conditions, such as the amount of discharge.
  • the height by which the narrow portion protrudes from the cover is determined to some extent by the width of the liquid gasket when it is dispensed, so the protruding height of the narrow portion is smaller than that of other parts of the gasket. As a result, there is a risk that the narrow portion may reduce the sealing performance of the gasket.
  • the problem to be solved was that the protruding height of the narrow part of the gasket was small, which could reduce the sealing performance.
  • the present invention provides a cover that is attached to an opening of a base of a housing that accommodates an internal mechanism within a space, closing the space.
  • the cover has an outer periphery that is received on the base, and a gasket that extends circumferentially along the outer periphery, protrudes from the outer periphery, and is compressed by contact with the base.
  • the gasket has a large portion that is relatively wide from the inside to the outside of the periphery, and a small portion that is relatively narrow. The small portion is raised in the compression direction of the gasket by a layer structure that has a raising layer.
  • the present invention also provides a recording device using the above cover.
  • This recording device includes a base that, together with the cover, forms a housing and houses an internal mechanism within a closed space.
  • the base includes an opening to which the cover is attached, and a cover receiving portion that receives the outer periphery of the cover with the gasket interposed therebetween.
  • the protruding height of the gasket in the compression direction at the narrow width portion can be increased by raising the height, thereby improving the sealing performance of the gasket.
  • FIG. 1 is a plan view of a recording apparatus according to a first embodiment of the present invention.
  • 2A is a schematic cross-sectional view of the recording apparatus of FIG. 1 taken along line II-II
  • FIG. 2B is a schematic cross-sectional view of a modified example.
  • 3A and 3B are schematic cross-sectional views showing an enlarged portion of FIG. 2A.
  • FIG. 4 is a bottom view of the cover of the recording device of FIG. 5A is a bottom view of the cover of FIG. 4 showing the periphery of a narrow portion of a gasket provided on the cover
  • FIG. 5B is a cross-sectional view taken along line VV of FIG. 5A.
  • 6A is a cross-sectional view taken along line VIA-VIA in FIG.
  • FIG. 5A and FIG. 6B is a cross-sectional view taken along line VIB-VIB in FIG. 5A.
  • FIG. 7 is a graph showing an example of the correlation between gasket width and protrusion height in a single layer.
  • FIG. 8A is a cross-sectional view showing the periphery of a narrow width portion of a gasket according to a second embodiment of the present invention
  • FIG. 8B is a cross-sectional view taken along line VIII-VIII in FIG. 8A.
  • FIG. 9 is a cross-sectional view showing the periphery of a narrow width portion of a gasket according to a third embodiment of the present invention.
  • FIG. 10(A) is a bottom view of a cover showing the periphery of a narrow portion of a gasket according to a fourth embodiment of the present invention
  • FIG. 10(B) is a cross-sectional view taken along line XX of FIG. 10(A).
  • FIG. 11 is a cross-sectional view of a gasket according to a modified example of the fourth embodiment.
  • the goal of improving the sealing performance of a gasket with a narrow section was achieved by raising the narrow section.
  • the cover 19 is attached to the opening 17a of the base 17 of the housing 3, which houses the internal mechanism 5 in the space 3a, to close the space 3a.
  • the cover 19 has an outer periphery 19a that is received on the base 17, and a gasket 29 that extends circumferentially along the outer periphery 19a, protruding from the outer periphery 19a and being compressed by contact with the base 17.
  • the gasket 29 has a large width portion 31 that is relatively large from the inside to the outside of the circumferential shape, and a small width portion 33 that is relatively small in width.
  • the small width portion 33 is raised in the compression direction of the gasket 29 by a layer structure having a raising layer 35 or 37.
  • the narrow portion 33 may include a first layer 35 as a bulking layer and a second layer 37 laminated on the first layer 35, and the wide portion 31 may be formed integrally with the second layer 37 of the narrow portion 33.
  • a transition portion 39 may be provided between the second layer 37 of the narrow portion 33 and the wide portion 31, the width of which and the height of the gasket 29 in the compression direction gradually decrease from the wide portion 31 to the narrow portion 33.
  • the end 35a of the first layer 35 of the narrow portion 33 in the extension direction of the gasket 29 may be located within the transition portion 39, and may be configured so that the width and height in the compression direction gradually increase as it moves away from the wide portion 31 in the extension direction.
  • the large width portion 31 can be a single layer or multiple layers. If it is multiple layers, it may have a first layer 41 and a second layer 43 that are integral with the first layer 35 and second layer 37, respectively, of the narrow width portion 33. In this case, the second layer 43 of the large width portion 31 may be configured to include the first layer 41 of the large width portion 31.
  • the narrow portion 33 may have the second layer 37 as a bulking layer.
  • the first layer 35 is formed integrally with the wide portion 31, and the second layer 37 is laminated on the first layer.
  • a transition portion may be provided between the first layer 35 of the narrow portion 33 and the wide portion 31.
  • the end 37a of the second layer 37 of the narrow portion 33 in the extension direction of the gasket 29 may be located on the transition portion 39, and the width and height in the compression direction may gradually increase as it moves away from the wide portion 31 in the extension direction.
  • the narrow portion 33 and the wide portion 31 may be offset in the width direction. Also, the first layer 35 and the second layer 37 of the narrow portion 33 may be offset in the width direction.
  • the recording device 1 using the cover 19 has a base 17 which, together with the cover 19, constitutes a housing 3 and houses an internal mechanism 5 within a closed space 3a.
  • the base 17 has an opening 17a to which the cover 19 is attached, and a cover receiving portion 25 which receives the outer periphery 19a of the cover 19 with a gasket 29 interposed therebetween.
  • FIG. 1 is a plan view of a recording apparatus according to a first embodiment of the present invention.
  • Fig. 2(A) is a schematic cross-sectional view taken along line II-II of the recording apparatus in Fig. 1
  • Fig. 2(B) is a schematic cross-sectional view of a modified example.
  • Fig. 3(A) and Fig. 3(B) are schematic cross-sectional views each showing an enlarged view of a portion around the gaskets on both sides of Fig. 2(A).
  • the recording device 1 in this embodiment is a hard disk drive serving as a magnetic disk device, and contains an internal mechanism 5 in a space 3a within a housing 3.
  • the internal mechanism 5 includes disks 7 as recording media, as well as a spindle motor 9.
  • a plurality of disks 7 are stacked in the thickness direction of the recording device 1 (hereinafter simply referred to as the "thickness direction") and are rotatably supported by the spindle motor 9. Information is written to and read from these disks 7 via a head (not shown).
  • the recording device 1 is not limited to a magnetic disk device, but may be other disk devices such as optical disk devices, or other recording devices other than disk devices.
  • the recording device 1 may be a tape-embedded drive, as shown in FIG. 2(B).
  • a tape film 13 as a recording medium wound between two tape reels 11 and a head assembly 15 for reading and writing information are housed in the space 3a of the housing 3 as the internal mechanism 5.
  • the housing 3 is composed of a base 17 and a cover 19, and seals or closes the interior.
  • the base 17 is made of a metal such as aluminum, and is configured in a box shape with an opening 17a on one side in the thickness direction.
  • the base 17 may have any suitable shape as long as it is box-shaped and capable of housing the internal mechanism 5 including the disk 7.
  • the base 17 has, for example, a substantially rectangular shape in a plan view. Note that a plan view refers to the state when viewed from the thickness direction, and does not distinguish between the top surface and the bottom surface.
  • This base 17 has a cover 19 attached to one opening 17a in the thickness direction to close it. This seals the space 3a inside the housing 3 that houses the internal mechanism 5.
  • This sealed space 3a may be filled with a gas that has less resistance than air, such as helium.
  • the outer periphery of the base 17 is provided with a side wall portion 21a in a circumferential manner, and the opening 17a of the base 17 is defined by the side wall portion 21a.
  • the outer periphery of the base 17 is the outer periphery region that surrounds the internal mechanism 5, and in this embodiment, refers to the portion where the side wall portion 21a is provided.
  • the side wall portion 21a is integrally erected from the plate-shaped bottom wall portion 21b of the base 17.
  • the side wall portion 21a can also be formed as a separate piece from the bottom wall portion 21b of the base 17 and then joined to form an integral piece.
  • This side wall portion 21a is provided with a fastening portion 23 and a cover receiving portion 25.
  • the fastening portion 23 of the base 17 is a portion that fastens the cover 19 to the base 17.
  • the fastening portion 23 is provided at multiple locations, for example, six locations, spaced apart in the circumferential direction of the base 17.
  • the fastening portion 23 may be formed in a circular shape along the outer periphery of the base 17.
  • the circumferential direction of the base 17 means the circumferential direction along the side wall portion 21a of the base 17.
  • the fastening portion 23 receives the cover 19 by joining it in the thickness direction.
  • the cover 19 is fastened to the fastening portion 23 by a fastener, for example, a bolt 27.
  • the cover 19 is also fastened to the spindle motor 9 by a bolt 27.
  • a fastener a rivet or the like may be used in addition to the bolt 27.
  • the cover receiving portion 25 receives the outer periphery 19a of the cover 19 with the gasket 29 attached to the cover 19 interposed therebetween. This causes the gasket 29 to be compressed in the thickness direction between the cover receiving portion 25 and the cover 19.
  • the cover receiving portion 25 is provided in a circular shape in a plan view along the side wall portion 21a of the base 17.
  • the cover receiving portion 25 may also be provided partially on the outer periphery of the base 17.
  • This cover receiving portion 25 has a receiving surface 25a that is configured flat along the width direction.
  • the gasket 29 is abutted against this receiving surface 25a to receive the outer periphery 19a of the cover 19.
  • the receiving surface 25a does not have to be flat, and may have irregularities, etc., as long as the gasket 29 can be abutted against it.
  • Figure 4 is a bottom view of the cover of the recording device in Figure 1.
  • the cover 19 is made of a metal plate such as aluminum.
  • the cover 19 is formed in a flat plate shape that covers the opening 17a of the base 17 as a whole.
  • the cover 19 in this embodiment has a substantially rectangular shape in a plan view to correspond to the base 17.
  • the shape and other configuration of the cover 19 is not particularly limited as long as it covers the opening 17a of the base 17.
  • the material of the cover 19 is also arbitrary.
  • the cover 19 has its outer periphery 19a received by the base 17 while covering the opening 17a of the base 17. Specifically, the outer periphery 19a of the cover 19 is received in the thickness direction by the cover receiving portion 25 of the base 17. The outer periphery 19a is a circular portion that is received by the base 17. A sealing gasket 29 is attached to the outer periphery 19a of the cover 19.
  • the gasket 29 extends circumferentially along the outer periphery 19a of the cover 19.
  • the gasket 29 protrudes in the thickness direction from the outer periphery 19a and is compressed by contact with the base 17.
  • the gasket 29 protruding from the outer periphery 19a of the cover 19 abuts against the cover receiving portion 25 of the base 17, and is compressed and interposed between the base 17 and the cover 19 in response to the fixation of the cover 19 to the base 17.
  • the protruding direction and compression direction of the gasket 29 coincide with the thickness direction, but they can be different. Also, while it is preferable that the protruding direction and compression direction of the gasket 29 coincide, they can be different as long as the gasket 29 is convex in the compression direction relative to the cover 19 and can ensure airtightness through compression. In the following, in this embodiment, the protruding direction and compression direction will be described as the thickness direction.
  • the compressed gasket 29 creates a seal between the cover 19 and the base 17.
  • the gasket 29 is compressed between the cover 19 and the cover receiving portion 25 of the base 17, creating a seal between the cover 19 and the cover receiving portion 25.
  • the gasket 29 in this embodiment is a liquid gasket such as a Foamed In Place Gasket (FIPG).
  • FIPG Foamed In Place Gasket
  • the gasket 29 is applied in advance to the outer periphery 19a of the cover 19 by dispensing it from an applicator such as a needle, and is fixed by hardening.
  • Fig. 5(A) is a bottom view of cover 19 in Fig. 4 showing the periphery of the narrow portion of the gasket provided on cover 19, and Fig. 5(B) is a cross-sectional view taken along line V-V in Fig. 5(A).
  • Fig. 6(A) is a cross-sectional view taken along line VIA-VIA in Fig. 5(A), and Fig. 6(B) is a cross-sectional view taken along line VIB-VIB in Fig. 5(A).
  • Fig. 5(B) shows a cross section along the extension direction and thickness direction of the gasket 19
  • Figs. 6(A) and (B) show cross sections perpendicular to the extension direction of the gasket 19.
  • Figs. 6(A) and (B) also show the relationship between the first layer 35, second layer 37, and transition portion 39 of the narrow width portion 33, and show a conceptual angular cross section of the narrow width portion 33.
  • the gasket 29 in this embodiment has a large width portion 31 and a small width portion 33.
  • the large width portion 31 is a portion of the gasket 29 that is relatively wide from inside to outside
  • the narrow width portion 33 is a portion of the gasket 29 that is relatively narrow from inside to outside.
  • the adjacent large width portion 31 and narrow width portion 33 are arranged concentrically in the width direction. "Concentrically” means that the centers of the large width portion 31 and narrow width portion 33 coincide in the width direction.
  • the widths of the narrow portion 33 and the wide portion 31 refer to the largest widths (maximum widths) in the narrow portion 33 and the wide portion 31, respectively, but may also refer to the smallest widths (minimum widths) or average widths. Within the wide portion 31 and the narrow portion 33, the widths are constant in the extension direction, but may vary in the extension direction.
  • the narrow width portion 33 is a portion of the gasket 29 that is narrowed in the extension direction due to space constraints such as to avoid interference with the internal mechanism 5. Note that one or more narrow width portions 33 are provided in the extension direction.
  • the narrow portion 33 is raised in the thickness direction, which is the compression direction of the gasket 29, by a layer structure having a raised layer. Raising refers to making the narrow portion 33 taller in the thickness direction than if it had the same number of layers as the large portion 31.
  • the number of layers here refers to the number of layers stacked on top of one layer, and does not include the number of layers that are included.
  • An included layer is a multi-layer structure in which another layer is embedded within a layer, and in terms of the number of layers, it becomes a single layer of one layer. Therefore, the narrow portion 33 has a greater number of layers than the large portion 31, including the raised layer.
  • the protruding height refers to the height in the thickness direction, which is the direction in which the gasket 29 protrudes from the cover 19.
  • the protruding height of the gasket 29 in this embodiment is the same between the narrow portion 33 and the wide portion 31 in the free state. However, it is also possible to make the protruding height of the gasket 29 greater or smaller in the narrow portion 33 than in the wide portion 31.
  • the free state refers to an unloaded state in which no compressive load is acting on the gasket 29, and in this embodiment, refers to the pre-closing state before the opening 17a of the base 17 is closed by the cover 19.
  • the large width portion 31 is a single layer
  • the narrow width portion 33 is multiple layers, in particular two layers.
  • the number of layers of the large width portion 31 and the narrow width portion 33 can be set arbitrarily as long as the narrow width portion 33 can be raised.
  • the single layer of the large width portion 31 here means a single layer in terms of the layer structure and number of layers, unlike inclusion.
  • hereinafter, when simply referring to a single layer it means a single layer in terms of the layer structure and number of layers.
  • the width and height in the thickness direction of the large portion 31 of the single layer are set when the liquid gasket is discharged from the needle. Note that when simply referring to height, it refers to the dimension in the thickness direction, which is the compression direction, as opposed to the protruding height from the cover 19 (the same applies below).
  • the width and height when the liquid gasket is discharged from the needle and hardened have a correlation such that one cannot be made larger or smaller than the other within the single layer.
  • the width and height of the large portion 31 are set according to this correlation.
  • Figure 7 shows an example of the correlation between width and height of a single layer gasket.
  • different correlations C1 and C2 between width and height can be obtained by changing the discharge conditions, such as the amount of liquid gasket dispensed, the needle movement speed, and the distance between the application surface of the cover 19 and the applicator.
  • the width (and height) of the wide portion 31 is adjusted within the range between these correlations C1 and C2.
  • the needle movement speed refers to the movement speed in the extension direction.
  • the two-layer narrow section 33 includes a first layer 35 and a second layer 37.
  • the first layer 35 is a layer that contacts the cover 19 at the narrow width portion 33, and functions as a bulking layer.
  • the second layer 37 is a layer that is laminated on the first layer 35 in the thickness direction. The second layer 37 is arranged concentrically with the first layer 35 in the width direction.
  • the first layer 35 and the second layer 37 are made of liquid gasket of the same material.
  • the first layer 35 and the second layer 37 may be liquid gaskets of different materials.
  • the width and height of the first layer 35 and the second layer 37 are set in the same way as the large width portion 31 when the liquid gasket is discharged from the needle and applied to the cover 19.
  • the first layer 35 and the second layer 37 When applying the first layer 35 and the second layer 37, the first layer 35 is applied, and then the second layer 37 is applied together with the large width portion 31.
  • the first layer 35 When multiple small width portions 33 are present, the first layer 35 is applied at the positions corresponding to the small width portions 33.
  • the second layer 37 is applied by changing the protrusion conditions at the positions corresponding to the small width portions 33 together with the application of the large width portions 31.
  • the entire gasket 29 is then hardened. Note that the first layer 35 may be applied and then hardened, and the large width portions 31 and the second layer 37 may be applied and then hardened separately.
  • the second layer 37 is formed integrally with the large portion 31 and has a constant width and height. Because the second layer 37 is formed integrally with the large portion 31, fluctuations in the protruding height of the gasket 29 can be suppressed and airtightness can be improved.
  • a transition portion 39 is provided between the large portion 31 and the second layer 37 of the narrow portion 33, and the transition portion 39 allows a smooth transition between the large portion 31 and the second layer 37 of the narrow portion 33, suppressing fluctuations in the protruding height of the gasket 29 and improving airtightness.
  • the transition portion 39 may be omitted.
  • the transition section 39 gradually decreases in width and height from the large width section 31 to the small width section 33.
  • "Gradually decreasing width and height” means that the width and height decrease continuously or in stages.
  • the transition section 39 has a width that decreases continuously in a linear manner with inclination on both sides in the width direction, and a height that decreases continuously in a parabolic manner, but the shape can be set arbitrarily.
  • both the width and height of the transition section 39 may decrease in a parabolic or linear manner.
  • the gradual decrease in width and height may be a shape in which multiple sections with continuously decreasing width and height are connected by a section with constant width and height, or a shape in which multiple sections with different widths and heights are constant are connected.
  • the end 35a in the extension direction of the first layer 35 is located within the transition section 39. Contrary to the transition section 39, this end 35a gradually increases in width and height as it moves away from the large width section 31 in the extension direction. This makes it possible to suppress fluctuations in the protruding height of the gasket 29 together with the transition section 39.
  • Gradually increasing width and height means that the width and height increase continuously or in stages.
  • the width and height increase continuously in a parabolic shape, but the width and height may also increase continuously in a linear shape.
  • gradual increasing width and height may be a shape in which multiple parts with continuously increasing width and height are connected by a part with constant width and height, or a shape in which multiple parts with different constant widths and heights are connected.
  • the width and height of the first layer 35 excluding the end 35a are constant and the same as those of the second layer 37. Therefore, in the width direction, the edge of the first layer 35 and the edge of the second layer 37 are aligned. Note that the width and height of the first layer 35 excluding the end 35a do not need to be the same as those of the second layer 37, and may be larger or smaller than those of the second layer 37.
  • the difference in protruding height between the narrow portion 33 and the wide portion 31 is made smaller than when there is no raising by the first layer 35. This is because in order to ensure the airtightness of the gasket 29, it is preferable to suppress the variation in height between the narrow portion 33 and the wide portion 31.
  • the cover 19 is attached to the base 17 of the housing 3 that accommodates the disk 7, and the space 3a of the housing 3 that accommodates the disk 7 is closed.
  • the cover 19 to which the gasket 29 is attached is placed opposite the opening 17a of the base 17 in the thickness direction. In this state, the cover 19 and the base 17 are brought close to each other, and the tip of the gasket 29 is brought into contact with the cover receiving portion 25 of the base 17.
  • the gasket 29 is compressed between the cover 19 and base 17.
  • the gasket 29 of this embodiment is sufficiently compressed not only in the large portion 31 but also in the small width portion 33, because the protruding height of the small width portion 33 is increased by raising the height. Therefore, the gasket 29 can improve the overall airtightness.
  • the second layer 37 which is the surface layer of the narrow portion 33, and the wide portion 31 are integrated, so the tip of the gasket 29 is smooth between the narrow portion 33 and the wide portion 31. Therefore, the gasket 29 can improve its sealing performance.
  • the transition portion 39 between the second layer 37 of the narrow portion 33 and the wide portion 31 gradually becomes smaller in width and height toward the narrow portion 33.
  • the end portion 35a of the first layer 35 of the narrow portion 33 is located within the transition portion 39, and the width and height gradually increase as it moves away from the wide portion 31 in the extension direction. This more reliably suppresses fluctuations in the protruding height of the gasket 29, improving airtightness.
  • the cover 19 is fastened to the base 17 with the bolts 27 to close the space 3a of the housing 3 that contains the disk 7.
  • FIG. 8(A) is a cross-sectional view showing the periphery of the narrow portion of the gasket according to the second embodiment of the present invention
  • FIG. 8(B) is a cross-sectional view taken along line VIII-VIII in FIG. 8(A). Note that since the second embodiment has a common basic configuration to the first embodiment, the same reference numerals are used for corresponding components and redundant explanations will be omitted.
  • FIG. 8(A) is a cross-section along the extension direction of the gasket. Also, FIG. 8(B) shows a conceptual cross-section of the wide portion 31 with an angular shape.
  • the large width portion 31 of the gasket 29 is made of multiple layers. That is, the large width portion 31 has a first layer 41 and a second layer 43.
  • the first layer 41 of the large width portion 31 is integrally and continuously formed with the first layer 35 of the narrow width portion 33, and has the same width and height as the first layer 35 of the narrow width portion 33. Note that the width and height of the first layer 41 of the large width portion 31 do not need to be the same as those of the narrow width portion 33.
  • the second layer 43 of the large portion 31 has the same width and height as the large portion 31 of Example 1, and contains the first layer 41. Therefore, the second layer 43 of the large portion 31 is in a state in which the first layer 41 is embedded, and is a single layer in terms of the number of layers.
  • the second layer 43 of the large width portion 31 is integral with the second layer 37 of the small width portion 33 and is continuous with the second layer 37 of the small width portion 33 via a transition portion 39.
  • the transition portion 39 is gradually reduced in width and height toward the small width portion 33, as in Example 1.
  • the other configurations are the same as in Example 1.
  • the same effects as those of the first embodiment can be achieved, and in addition, the first layers 41 and 35 of the large width portion 31 and the small width portion 33 can be formed continuously and circumferentially together, making it easier to form the gasket 29.
  • Figure 9 is a cross-sectional view showing the vicinity of the narrow portion of the gasket according to the third embodiment of the present invention. Note that since the third embodiment has a basic configuration in common with the first embodiment, the same reference numerals are used for corresponding configurations and duplicated explanations are omitted. Figure 9 is a cross-section along the extension direction of the gasket.
  • the second layer 37 of the narrow width portion 33 is used as a raised layer.
  • the first layer 35 of the narrow portion 33 is integral with the single-layer wide portion 31.
  • the first layer 35 is continuous with the wide portion 31 via the transition portion 39.
  • the wide portion 31 has the same width and height as in Example 1.
  • the transition portion 39 gradually decreases in width and height toward the narrow portion 33, and the first layer 35 of the narrow portion 33 has the same constant width and height as the first layer 35 of Example 1. This forms a recess 45 from the transition portion 39 over the first layer 35 of the narrow portion 33.
  • the second layer 37 of the narrow portion 33 is located within this recess 45.
  • the recess 45 and the second layer 37 have the same cross-sectional shape.
  • the second layer 37 has the same width and height on the first layer 35 as the second layer 37 of embodiment 1, and the end 37a, which gradually increases in width and height, is located on the transition portion 39.
  • the cross-sectional shape of the second layer 37 may be larger or smaller than the recess 45. If the cross-sectional shape of the second layer 37 is larger than the recess 45, the second layer 37 will protrude in the thickness direction more than the large portion 31, and if the cross-sectional shape of the second layer 37 is smaller than the recess 45, the second layer 37 will be recessed in the thickness direction more than the large portion 31.
  • Example 3 can achieve the same effects as Example 1.
  • Fig. 10(A) is a bottom view of a cover showing the periphery of the narrow portion of a gasket according to Example 4 of the present invention
  • Fig. 10(B) is a cross-sectional view along line X-X in Fig. 10(A).
  • Example 4 has a common basic configuration to Example 1, so the same reference numerals are used for corresponding components and duplicated explanations will be omitted.
  • Fig. 10(B) shows a conceptual angular cross section of the narrow portion 33.
  • the narrow portion 33 is offset in the width direction relative to the wide portion 31. Accordingly, the shape of the transition portion 39 is changed from that of the first embodiment.
  • the offset here refers to the deviation in the width direction between the center of the narrow portion 33 in the width direction and the center of the wide portion 31 in the width direction in a cross section perpendicular to the extension direction of the gasket 29.
  • the narrow width portion 33 is eccentric so that its outer edge coincides with the outer edge of the wide width portion 31 in the width direction.
  • the amount of eccentricity can be set appropriately, and the outer edge of the narrow width portion 33 does not have to coincide with the outer edge of the wide width portion 31.
  • the transition portion 39 is designed so that the width gradually decreases only at the inner edge in the width direction. The rest is the same as in Example 1.
  • Example 4 can achieve the same effect as Example 1.
  • the eccentricity of the narrow portion 33 and the wide portion 31 can prevent the gasket 29 from protruding or bulging inward in the width direction when compressed.
  • FIG. 11 is a cross-sectional view showing the narrow portion 33 of the gasket 29 according to a modified example of the fourth embodiment, in which the cross section of the narrow portion 33 is conceptually angular.
  • the first layer 35 and the second layer 37 of the narrow width portion 33 are offset in the width direction. That is, the second layer 37 is set to be smaller in width and height than the first layer 35, and is offset outward in the width direction relative to the first layer 35. Due to this offset, the outer edge of the first layer 35 and the outer edge of the second layer 37 coincide in the width direction.
  • eccentricity refers to the deviation in the width direction between the center of the width direction of the first layer 35 of the narrow width portion 33 and the center of the width direction of the second layer 37 of the narrow width portion 33 in a cross section perpendicular to the extension direction of the gasket 29.
  • the amount of eccentricity can be set appropriately, and the outer edge of the first layer 35 and the outer edge of the second layer 37 do not need to coincide.
  • the modified example in Figure 11 can be applied to the narrow width portion 33 of any of Examples 1 to 4.
  • the eccentricity of the first layer 35 and the second layer 37 can prevent the gasket 29 from protruding or bulging inward in the width direction when compressed.

Landscapes

  • Gasket Seals (AREA)

Abstract

Provided is a cover with which it is possible to improve the sealability of a gasket having a narrow-width section. A cover 19 is installed in an opening 17a in a base 17 of a housing 3 for housing an internal mechanism 5 in a space 3a, and the cover closes off the space 3a. The cover comprises: an outer peripheral section 19a that is received in the base 17; and a gasket 29 that is provided stretched in a circuiting form along the outer peripheral section 19a and that, protruding from the outer peripheral section 19a, is compressed by abutting on the base 17. The gasket 29 is provided with a broad-width section 31 the width of which across the inside and outside of the circuiting form is relatively large, and a narrow-width section 33 the width of which is relatively small, the narrow-width section 33 being given bulk along the direction of compression of the gasket 29 by a layered structure having a bulk-adding layer.

Description

カバー及びこのカバーを用いた記録装置Cover and recording device using said cover
　本発明は、ハードディスクドライブ等の記録装置のカバー及びこのカバーを用いた記録装置に関する。 The present invention relates to a cover for a recording device such as a hard disk drive and a recording device using this cover.
　記録装置としてのハードディスクドライブは、記録媒体であるディスクを含む内部機構を空間部内に収容しており、その空間部に塵埃や湿気等が侵入しないように密閉性が要求される。 Hard disk drives, which are used as recording devices, house the internal mechanisms, including the disk that serves as the recording medium, in a space that must be sealed to prevent dust, moisture, etc. from entering.
　かかる密閉性の確保のために、空間部を区画するハウジングのベースとカバーとの間にガスケットが設けられるのが一般的である（例えば特許文献１）。ガスケットは、ベースに受けられるカバーの外周部に沿って周回状に設けられ、カバーとベースとの間で圧縮されて介在する。 To ensure this airtightness, a gasket is generally provided between the base and cover of the housing that defines the space (see, for example, Patent Document 1). The gasket is provided in a circumferential shape along the outer periphery of the cover that is received on the base, and is compressed between the cover and the base.
　このガスケットは、スペース上の制約により、部分的に周回状の内外にわたる幅を小さくした小幅部を有することがある。小幅部は、ニードル等の塗布具から吐出した液状ガスケットをカバーに塗布して硬化させる場合、吐出量等の吐出条件を変更することで容易に設定することができる。 Due to space constraints, this gasket may have a narrow portion where the width is narrowed partially on the inside and outside of the circumference. When liquid gasket is applied to the cover from an applicator such as a needle and allowed to harden, the narrow portion can be easily set by changing the discharge conditions, such as the amount of discharge.
　しかし、小幅部は、液状ガスケットが吐出される際の幅に応じてカバーからの突出高さがある程度決まるため、ガスケットの他の部分と比較して突出高さが小さくなる。この結果、小幅部は、ガスケットの密閉性を低下させるおそれがあった。 However, the height by which the narrow portion protrudes from the cover is determined to some extent by the width of the liquid gasket when it is dispensed, so the protruding height of the narrow portion is smaller than that of other parts of the gasket. As a result, there is a risk that the narrow portion may reduce the sealing performance of the gasket.
特開平８－０４５２６４号公報Japanese Patent Application Laid-Open No. 8-045264
　解決しようとする問題点は、ガスケットの小幅部において突出高さが小さくなり、密閉性が低下するおそれがあった点である。 The problem to be solved was that the protruding height of the narrow part of the gasket was small, which could reduce the sealing performance.
　本発明は、空間部内に内部機構を収容するハウジングのベースの開口部に取り付けられて前記空間部を閉止するカバーを提供する。このカバーは、前記ベースに受けられる外周部と、該外周部に沿って周回状に延設され、前記外周部から突出して前記ベースへの当接により圧縮されるガスケットとを備える。前記ガスケットは、前記周回状の内外にわたる幅が相対的に大きい大幅部及び該幅が相対的に小さい小幅部を備える。前記小幅部は、嵩上げ層を有する層構造によって前記ガスケットの圧縮方向に嵩上げされている。 The present invention provides a cover that is attached to an opening of a base of a housing that accommodates an internal mechanism within a space, closing the space. The cover has an outer periphery that is received on the base, and a gasket that extends circumferentially along the outer periphery, protrudes from the outer periphery, and is compressed by contact with the base. The gasket has a large portion that is relatively wide from the inside to the outside of the periphery, and a small portion that is relatively narrow. The small portion is raised in the compression direction of the gasket by a layer structure that has a raising layer.
　また、本発明は、上記カバーを用いた記録装置を提供する。この記録装置は、前記カバーと共にハウジングを構成し閉止された空間部内に内部機構を収容するベースを備える。前記ベースは、前記カバーが取り付けられる開口部と、前記カバーの前記外周部を前記ガスケットを介在させつつ受けるカバー受け部とを備える。 The present invention also provides a recording device using the above cover. This recording device includes a base that, together with the cover, forms a housing and houses an internal mechanism within a closed space. The base includes an opening to which the cover is attached, and a cover receiving portion that receives the outer periphery of the cover with the gasket interposed therebetween.
　本発明によれば、小幅部においてガスケットの圧縮方向の突出高さを嵩上げにより大きくし、ガスケットによる密閉性を向上することができる。 According to the present invention, the protruding height of the gasket in the compression direction at the narrow width portion can be increased by raising the height, thereby improving the sealing performance of the gasket.
図１は、本発明の実施例１に係る記録装置の平面図である。FIG. 1 is a plan view of a recording apparatus according to a first embodiment of the present invention. 図２（Ａ）は、図１の記録装置のＩＩ－ＩＩ線に係る概略断面図、図２（Ｂ）は、変形例に係る概略断面図である。2A is a schematic cross-sectional view of the recording apparatus of FIG. 1 taken along line II-II, and FIG. 2B is a schematic cross-sectional view of a modified example. 図３（Ａ）及び図３（Ｂ）は、図２（Ａ）の一部を拡大して示す概略断面図である。3A and 3B are schematic cross-sectional views showing an enlarged portion of FIG. 2A. 図４は、図１の記録装置のカバーの底面図である。FIG. 4 is a bottom view of the cover of the recording device of FIG. 図５（Ａ）は、図４のカバーに設けられたガスケットの小幅部周辺を示すカバーの底面図であり、図５（Ｂ）は、図５（Ａ）のＶ－Ｖ線に係る断面図である。5A is a bottom view of the cover of FIG. 4 showing the periphery of a narrow portion of a gasket provided on the cover, and FIG. 5B is a cross-sectional view taken along line VV of FIG. 5A. 図６（Ａ）は、図５（Ａ）のＶＩＡ－ＶＩＡ線に係る断面図であり、図６（Ｂ）は、図５（Ａ）のＶＩＢ－ＶＩＢ線に係る断面図である。6A is a cross-sectional view taken along line VIA-VIA in FIG. 5A, and FIG. 6B is a cross-sectional view taken along line VIB-VIB in FIG. 5A. 図７は、単層におけるガスケットの幅と突出高さの相関の一例を示すグラフである。FIG. 7 is a graph showing an example of the correlation between gasket width and protrusion height in a single layer. 図８（Ａ）は、本発明の実施例２に係り、ガスケットの小幅部周辺を示す断面図、図８（Ｂ）は、図８（Ａ）のＶＩＩＩ－ＶＩＩＩ線に係る断面図である。FIG. 8A is a cross-sectional view showing the periphery of a narrow width portion of a gasket according to a second embodiment of the present invention, and FIG. 8B is a cross-sectional view taken along line VIII-VIII in FIG. 8A. 図９は、本発明の実施例３に係るガスケットの小幅部周辺を示す断面図である。FIG. 9 is a cross-sectional view showing the periphery of a narrow width portion of a gasket according to a third embodiment of the present invention. 図１０（Ａ）は、本発明の実施例４に係るガスケットの小幅部周辺を示すカバーの底面図であり、図１０（Ｂ）は、図１０（Ａ）のＸ－Ｘ線に係る断面図である。FIG. 10(A) is a bottom view of a cover showing the periphery of a narrow portion of a gasket according to a fourth embodiment of the present invention, and FIG. 10(B) is a cross-sectional view taken along line XX of FIG. 10(A). 図１１は、実施例４の変形例に係るガスケットの断面図である。FIG. 11 is a cross-sectional view of a gasket according to a modified example of the fourth embodiment.
　小幅部を有するガスケットの密閉性を向上するという目的を、小幅部を嵩上げすることによって実現した。 The goal of improving the sealing performance of a gasket with a narrow section was achieved by raising the narrow section.
　図のように、カバー１９は、空間部３ａ内に内部機構５を収容するハウジング３のベース１７の開口部１７ａに取り付けられて空間部３ａを閉止するものである。このカバー１９は、ベース１７に受けられる外周部１９ａと、外周部１９ａに沿って周回状に延設され、外周部１９ａから突出してベース１７への当接により圧縮されるガスケット２９とを備えている。ガスケット２９は、周回状の内外にわたる幅が相対的に大きい大幅部３１及び幅が相対的に小さい小幅部３３を備える。小幅部３３は、嵩上げ層３５又は３７を有する層構造によってガスケット２９の圧縮方向に嵩上げされている。 As shown in the figure, the cover 19 is attached to the opening 17a of the base 17 of the housing 3, which houses the internal mechanism 5 in the space 3a, to close the space 3a. The cover 19 has an outer periphery 19a that is received on the base 17, and a gasket 29 that extends circumferentially along the outer periphery 19a, protruding from the outer periphery 19a and being compressed by contact with the base 17. The gasket 29 has a large width portion 31 that is relatively large from the inside to the outside of the circumferential shape, and a small width portion 33 that is relatively small in width. The small width portion 33 is raised in the compression direction of the gasket 29 by a layer structure having a raising layer 35 or 37.
　小幅部３３は、嵩上げ層としての第一層３５と、この第一層３５上に積層された第二層３７とを備え、大幅部３１は、小幅部３３の第二層３７と一体に形成されてもよい。この場合、小幅部３３の第二層３７と大幅部３１との間は、大幅部３１から小幅部３３へ向けて漸次幅及びガスケット２９の圧縮方向での高さが小さくなる遷移部３９を備えた構成としてもよい。 The narrow portion 33 may include a first layer 35 as a bulking layer and a second layer 37 laminated on the first layer 35, and the wide portion 31 may be formed integrally with the second layer 37 of the narrow portion 33. In this case, a transition portion 39 may be provided between the second layer 37 of the narrow portion 33 and the wide portion 31, the width of which and the height of the gasket 29 in the compression direction gradually decrease from the wide portion 31 to the narrow portion 33.
　ガスケット２９の延設方向における小幅部３３の第一層３５の端部３５ａは、遷移部３９内に位置し、延設方向で大幅部３１から離れるにつれて幅及び圧縮方向での高さが漸次大きくなる構成としてもよい。 The end 35a of the first layer 35 of the narrow portion 33 in the extension direction of the gasket 29 may be located within the transition portion 39, and may be configured so that the width and height in the compression direction gradually increase as it moves away from the wide portion 31 in the extension direction.
　大幅部３１は、単層又は複層とすることが可能である。複層とする場合は、小幅部３３の第一層３５及び第二層３７とそれぞれ一体の第一層４１及び第二層４３を備えてもよい。この場合、大幅部３１の第二層４３は、大幅部３１の第一層４１を内包する構成としてもよい。 The large width portion 31 can be a single layer or multiple layers. If it is multiple layers, it may have a first layer 41 and a second layer 43 that are integral with the first layer 35 and second layer 37, respectively, of the narrow width portion 33. In this case, the second layer 43 of the large width portion 31 may be configured to include the first layer 41 of the large width portion 31.
　小幅部３３は、第二層３７を嵩上げ層としてもよい。この場合は、第一層３５を大幅部３１と一体に形成し、第一層上に第二層３７を積層する。小幅部３３の第一層３５と大幅部３１との間に遷移部を備えてもよい。ガスケット２９の延設方向における小幅部３３の第二層３７の端部３７ａは、遷移部３９上に位置し、延設方向で大幅部３１から離れるにつれて幅及び圧縮方向での高さが漸次大きくなってもよい。 The narrow portion 33 may have the second layer 37 as a bulking layer. In this case, the first layer 35 is formed integrally with the wide portion 31, and the second layer 37 is laminated on the first layer. A transition portion may be provided between the first layer 35 of the narrow portion 33 and the wide portion 31. The end 37a of the second layer 37 of the narrow portion 33 in the extension direction of the gasket 29 may be located on the transition portion 39, and the width and height in the compression direction may gradually increase as it moves away from the wide portion 31 in the extension direction.
　小幅部３３及び大幅部３１は、幅方向において偏心してもよい。また、小幅部３３の第一層３５と第二層３７とを幅方向において偏心させてもよい。 The narrow portion 33 and the wide portion 31 may be offset in the width direction. Also, the first layer 35 and the second layer 37 of the narrow portion 33 may be offset in the width direction.
　上記カバー１９を用いた記録装置１は、カバー１９と共にハウジング３を構成し、閉止された空間部３ａ内に内部機構５を収容するベース１７を備える。ベース１７は、カバー１９が取り付けられる開口部１７ａと、カバー１９の外周部１９ａをガスケット２９を介在させつつ受けるカバー受け部２５とを備える。 The recording device 1 using the cover 19 has a base 17 which, together with the cover 19, constitutes a housing 3 and houses an internal mechanism 5 within a closed space 3a. The base 17 has an opening 17a to which the cover 19 is attached, and a cover receiving portion 25 which receives the outer periphery 19a of the cover 19 with a gasket 29 interposed therebetween.
［記録装置の構成］
　図１は、本発明の実施例１に係る記録装置の平面図である。図２（Ａ）は、図１の記録装置のＩＩ－ＩＩ線に係る概略断面図、図２（Ｂ）は、変形例に係る概略断面図である。図３は、図３（Ａ）及び図３（Ｂ）は、図２（Ａ）の両側のガスケット周辺の一部を拡大して示す概略断面図である。 [Configuration of the recording device]
Fig. 1 is a plan view of a recording apparatus according to a first embodiment of the present invention. Fig. 2(A) is a schematic cross-sectional view taken along line II-II of the recording apparatus in Fig. 1, and Fig. 2(B) is a schematic cross-sectional view of a modified example. Fig. 3(A) and Fig. 3(B) are schematic cross-sectional views each showing an enlarged view of a portion around the gaskets on both sides of Fig. 2(A).
　本実施例の記録装置１は、磁気ディスク装置としてのハードディスクドライブであり、ハウジング３内の空間部３ａに内部機構５を収容している。 The recording device 1 in this embodiment is a hard disk drive serving as a magnetic disk device, and contains an internal mechanism 5 in a space 3a within a housing 3.
　内部機構５は、記録媒体としてのディスク７の他、スピンドルモーター９等を備えている。ディスク７は、記録装置１の厚み方向（以下、単に「厚み方向」と称する。）に複数積層され、スピンドルモーター９により回転可能に支持された構成となっている。これらディスク７は、図示しないヘッドを通じて情報の読み書きが行われるようになっている。 The internal mechanism 5 includes disks 7 as recording media, as well as a spindle motor 9. A plurality of disks 7 are stacked in the thickness direction of the recording device 1 (hereinafter simply referred to as the "thickness direction") and are rotatably supported by the spindle motor 9. Information is written to and read from these disks 7 via a head (not shown).
　なお、記録装置１としては、磁気ディスク装置に限られず、光ディスク装置等の他のディスク装置或いはディスク装置以外の他の記録装置であってもよい。例えば、記録装置１は、図２（Ｂ）のように、テープ埋め込み型ドライブとしてもよい。この記録装置１では、二つのテープリール１１間に巻き取られた記録媒体としてのテープフィルム１３及び情報の読み書き用のヘッドアッセンブリ１５が内部機構５としてハウジング３の空間部３ａに収容されている。 Note that the recording device 1 is not limited to a magnetic disk device, but may be other disk devices such as optical disk devices, or other recording devices other than disk devices. For example, the recording device 1 may be a tape-embedded drive, as shown in FIG. 2(B). In this recording device 1, a tape film 13 as a recording medium wound between two tape reels 11 and a head assembly 15 for reading and writing information are housed in the space 3a of the housing 3 as the internal mechanism 5.
　ハウジング３は、ベース１７と、カバー１９とで構成され、内部を密閉又は封止するものである。 The housing 3 is composed of a base 17 and a cover 19, and seals or closes the interior.
　ベース１７は、アルミニウム等の金属からなり、厚み方向の一方に開口部１７ａを有する箱状に構成されている。なお、ベース１７は、ディスク７を含む内部機構５を収容可能な箱状であればよく、その限りにおいて適宜の形状を採用可能である。本実施例のベース１７は、例えば平面視で略矩形形状となっている。なお、平面視とは、厚み方向から見た状態を意味し、平面及び底面を区別する意味ではない。 The base 17 is made of a metal such as aluminum, and is configured in a box shape with an opening 17a on one side in the thickness direction. The base 17 may have any suitable shape as long as it is box-shaped and capable of housing the internal mechanism 5 including the disk 7. In this embodiment, the base 17 has, for example, a substantially rectangular shape in a plan view. Note that a plan view refers to the state when viewed from the thickness direction, and does not distinguish between the top surface and the bottom surface.
　このベース１７は、厚み方向の一方の開口部１７ａにカバー１９が取り付けられて閉止される。これによって内部機構５を収容するハウジング３内の空間部３ａが密閉される。この密閉状の空間部３ａには、ヘリウム等の空気よりも抵抗の少ないガスを封入してもよい。 This base 17 has a cover 19 attached to one opening 17a in the thickness direction to close it. This seals the space 3a inside the housing 3 that houses the internal mechanism 5. This sealed space 3a may be filled with a gas that has less resistance than air, such as helium.
　ベース１７の外周部には、側壁部２１ａが周回状に備えられ、ベース１７の開口部１７ａは、側壁部２１ａによって区画されている。なお、ベース１７の外周部は、内部機構５を囲む外周領域であり、本実施例において側壁部２１ａが設けられている部分をいう。 The outer periphery of the base 17 is provided with a side wall portion 21a in a circumferential manner, and the opening 17a of the base 17 is defined by the side wall portion 21a. The outer periphery of the base 17 is the outer periphery region that surrounds the internal mechanism 5, and in this embodiment, refers to the portion where the side wall portion 21a is provided.
　側壁部２１ａは、ベース１７の板状の底壁部２１ｂから一体に立設されている。ただし、側壁部２１ａは、ベース１７の底壁部２１ｂに対して別体に形成したものを結合して一体的に形成することもできる。 The side wall portion 21a is integrally erected from the plate-shaped bottom wall portion 21b of the base 17. However, the side wall portion 21a can also be formed as a separate piece from the bottom wall portion 21b of the base 17 and then joined to form an integral piece.
　この側壁部２１ａには、締結部２３とカバー受け部２５とが設けられている。 This side wall portion 21a is provided with a fastening portion 23 and a cover receiving portion 25.
　ベース１７の締結部２３は、ベース１７に対してカバー１９を締結する部分である。本実施例において、締結部２３は、ベース１７の周方向に間隔を空けて複数、例えば６カ所設けられている。なお、締結部２３は、ベース１７の外周部に沿って周回状に形成してもよい。ベース１７の周方向とは、ベース１７の側壁部２１ａに沿った周回方向を意味する。 The fastening portion 23 of the base 17 is a portion that fastens the cover 19 to the base 17. In this embodiment, the fastening portion 23 is provided at multiple locations, for example, six locations, spaced apart in the circumferential direction of the base 17. The fastening portion 23 may be formed in a circular shape along the outer periphery of the base 17. The circumferential direction of the base 17 means the circumferential direction along the side wall portion 21a of the base 17.
　締結部２３は、カバー１９を厚み方向で接合させて受ける。この接合状態で、カバー１９は、締結具、例えばボルト２７により締結部２３に締結される。なお、カバー１９は、スピンドルモーター９にもボルト２７により締結されている。締結具としては、ボルト２７以外にもリベット等を用いてもよい。 The fastening portion 23 receives the cover 19 by joining it in the thickness direction. In this joined state, the cover 19 is fastened to the fastening portion 23 by a fastener, for example, a bolt 27. The cover 19 is also fastened to the spindle motor 9 by a bolt 27. As a fastener, a rivet or the like may be used in addition to the bolt 27.
　カバー受け部２５は、カバー１９に取り付けられたガスケット２９を介在させつつカバー１９の外周部１９ａを受けるものである。これにより、カバー受け部２５とカバー１９との間でガスケット２９を厚み方向で圧縮している。 The cover receiving portion 25 receives the outer periphery 19a of the cover 19 with the gasket 29 attached to the cover 19 interposed therebetween. This causes the gasket 29 to be compressed in the thickness direction between the cover receiving portion 25 and the cover 19.
　本実施例のカバー受け部２５は、ベース１７の側壁部２１ａに沿って平面視で周回状に設けられている。ただし、カバー受け部２５は、ベース１７の外周部に部分的に備えられてもよい。 In this embodiment, the cover receiving portion 25 is provided in a circular shape in a plan view along the side wall portion 21a of the base 17. However, the cover receiving portion 25 may also be provided partially on the outer periphery of the base 17.
　このカバー受け部２５は、幅方向に沿って平坦に構成された受け面２５ａを有する。この受け面２５ａにガスケット２９を当接させてカバー１９の外周部１９ａを受ける。なお、受け面２５ａは、平坦でなくてもよく、ガスケット２９を当接させることができれば凹凸等を有してもよい。 This cover receiving portion 25 has a receiving surface 25a that is configured flat along the width direction. The gasket 29 is abutted against this receiving surface 25a to receive the outer periphery 19a of the cover 19. Note that the receiving surface 25a does not have to be flat, and may have irregularities, etc., as long as the gasket 29 can be abutted against it.
　図４は、図１の記録装置のカバーの底面図である。 Figure 4 is a bottom view of the cover of the recording device in Figure 1.
　カバー１９は、図１～図４のように、アルミニウム等の金属製の板材からなる。カバー１９は、全体としてベース１７の開口部１７ａを覆う平板状に形成されている。本実施例のカバー１９は、ベース１７に対応して平面視において略矩形形状となっている。ただし、カバー１９の形状等の形態は、ベース１７の開口部１７ａを覆うものであれば、特に限定されるものではない。また、カバー１９の材質も任意である。 As shown in Figures 1 to 4, the cover 19 is made of a metal plate such as aluminum. The cover 19 is formed in a flat plate shape that covers the opening 17a of the base 17 as a whole. The cover 19 in this embodiment has a substantially rectangular shape in a plan view to correspond to the base 17. However, the shape and other configuration of the cover 19 is not particularly limited as long as it covers the opening 17a of the base 17. The material of the cover 19 is also arbitrary.
　このカバー１９は、ベース１７の開口部１７ａを覆った状態で、外周部１９ａがベース１７に受けられる。具体的には、カバー１９の外周部１９ａは、ベース１７のカバー受け部２５に厚み方向で受けられている。なお、外周部１９ａは、ベース１７に受けられる周回状の部分である。このカバー１９の外周部１９ａには、密閉用のガスケット２９が取り付けられている。 The cover 19 has its outer periphery 19a received by the base 17 while covering the opening 17a of the base 17. Specifically, the outer periphery 19a of the cover 19 is received in the thickness direction by the cover receiving portion 25 of the base 17. The outer periphery 19a is a circular portion that is received by the base 17. A sealing gasket 29 is attached to the outer periphery 19a of the cover 19.
　ガスケット２９は、カバー１９の外周部１９ａに沿って周回状に延設されている。ガスケット２９は、外周部１９ａから厚み方向に突出してベース１７への当接により圧縮される。具体的には、カバー１９の外周部１９ａから突出したガスケット２９は、ベース１７のカバー受け部２５に当接し、カバー１９のベース１７への固定に応じ、ベース１７及びカバー１９間に圧縮されて介在する。 The gasket 29 extends circumferentially along the outer periphery 19a of the cover 19. The gasket 29 protrudes in the thickness direction from the outer periphery 19a and is compressed by contact with the base 17. Specifically, the gasket 29 protruding from the outer periphery 19a of the cover 19 abuts against the cover receiving portion 25 of the base 17, and is compressed and interposed between the base 17 and the cover 19 in response to the fixation of the cover 19 to the base 17.
　なお、ガスケット２９の突出方向及び圧縮方向は、本実施例において厚み方向に一致するが、異ならせることも可能である。また、ガスケット２９の突出方向及び圧縮方向は、一致することが好ましいが、ガスケット２９がカバー１９に対して圧縮方向に凸であって圧縮により密閉性を確保できる限り、異ならせることも可能である。以下、本実施例では、突出方向及び圧縮方向を厚み方向として説明する。 In this embodiment, the protruding direction and compression direction of the gasket 29 coincide with the thickness direction, but they can be different. Also, while it is preferable that the protruding direction and compression direction of the gasket 29 coincide, they can be different as long as the gasket 29 is convex in the compression direction relative to the cover 19 and can ensure airtightness through compression. In the following, in this embodiment, the protruding direction and compression direction will be described as the thickness direction.
　圧縮されたガスケット２９は、カバー１９とベース１７との間を密閉する。本実施例のガスケット２９は、カバー１９とベース１７のカバー受け部２５との間で圧縮され、カバー１９とカバー受け部２５との間を密閉している。 The compressed gasket 29 creates a seal between the cover 19 and the base 17. In this embodiment, the gasket 29 is compressed between the cover 19 and the cover receiving portion 25 of the base 17, creating a seal between the cover 19 and the cover receiving portion 25.
　本実施例のガスケット２９は、ＦＩＰＧ（Ｆｏａｍｅｄ　Ｉｎ　Ｐｌａｃｅ　Ｇａｓｋｅｔ）等の液体ガスケットが用いられている。すなわち、ガスケット２９は、予めカバー１９の外周部１９ａに、ニードル等の塗布具からの吐出により塗布されて硬化により定着している。 The gasket 29 in this embodiment is a liquid gasket such as a Foamed In Place Gasket (FIPG). In other words, the gasket 29 is applied in advance to the outer periphery 19a of the cover 19 by dispensing it from an applicator such as a needle, and is fixed by hardening.
　図５（Ａ）は、図４のカバー１９に設けられたガスケットの小幅部周辺を示すカバー１９の底面図であり、図５（Ｂ）は、図５（Ａ）のＶ－Ｖ線に係る断面図である。図６（Ａ）は、図５（Ａ）のＶＩＡ－ＶＩＡ線に係る断面図であり、図６（Ｂ）は、図５（Ａ）のＶＩＢ－ＶＩＢ線に係る断面図である。 Fig. 5(A) is a bottom view of cover 19 in Fig. 4 showing the periphery of the narrow portion of the gasket provided on cover 19, and Fig. 5(B) is a cross-sectional view taken along line V-V in Fig. 5(A). Fig. 6(A) is a cross-sectional view taken along line VIA-VIA in Fig. 5(A), and Fig. 6(B) is a cross-sectional view taken along line VIB-VIB in Fig. 5(A).
　なお、図５（Ｂ）は、ガスケット１９の延設方向及び厚み方向に沿った断面、図６（Ａ）及び（Ｂ）は、ガスケット１９の延設方向に直交する断面を示す。また、図６（Ａ）及び（Ｂ）は、小幅部３３の第一層３５、第二層３７、遷移部３９の関係を示すものであり、小幅部３３の断面を角張った概念的なものとしている。 Note that Fig. 5(B) shows a cross section along the extension direction and thickness direction of the gasket 19, and Figs. 6(A) and (B) show cross sections perpendicular to the extension direction of the gasket 19. Figs. 6(A) and (B) also show the relationship between the first layer 35, second layer 37, and transition portion 39 of the narrow width portion 33, and show a conceptual angular cross section of the narrow width portion 33.
　本実施例のガスケット２９は、大幅部３１と、小幅部３３とを備えている。 The gasket 29 in this embodiment has a large width portion 31 and a small width portion 33.
　大幅部３１は、ガスケット２９の周回状の内外にわたる幅が相対的に大きい部分であり、小幅部３３は、ガスケット２９の周回状の内外にわたる幅が相対的に小さい部分である。隣接する大幅部３１と小幅部３３とは、幅方向で同心状に配置されている。同心状とは、大幅部３１と小幅部３３との幅方向の中心が幅方向において一致していることをいう。 The large width portion 31 is a portion of the gasket 29 that is relatively wide from inside to outside, and the narrow width portion 33 is a portion of the gasket 29 that is relatively narrow from inside to outside. The adjacent large width portion 31 and narrow width portion 33 are arranged concentrically in the width direction. "Concentrically" means that the centers of the large width portion 31 and narrow width portion 33 coincide in the width direction.
　なお、小幅部３３及び大幅部３１の幅は、それぞれ小幅部３３中及び大幅部３１中の最も大きい幅（最大幅）をいうが、最も小さい幅（最小幅）や幅の平均値等であってもよい。大幅部３１内と小幅部３３内において、それぞれ延設方向で幅は一定であるが、延設方向で変動させてもよい。 The widths of the narrow portion 33 and the wide portion 31 refer to the largest widths (maximum widths) in the narrow portion 33 and the wide portion 31, respectively, but may also refer to the smallest widths (minimum widths) or average widths. Within the wide portion 31 and the narrow portion 33, the widths are constant in the extension direction, but may vary in the extension direction.
　小幅部３３は、内部機構５との干渉を避けるため等のスペース上の制約により、ガスケット２９の延設方向での一部の幅を小さくしたものである。なお、小幅部３３は、延設方向に１つ以上設けられる。 The narrow width portion 33 is a portion of the gasket 29 that is narrowed in the extension direction due to space constraints such as to avoid interference with the internal mechanism 5. Note that one or more narrow width portions 33 are provided in the extension direction.
　この小幅部３３は、嵩上げ層を有する層構造によってガスケット２９の圧縮方向である厚み方向に嵩上げされている。嵩上げは、小幅部３３を大幅部３１と同一の積層数とした場合に対して厚み方向に高くすることをいう。ここでの積層数とは、一の層に対して他の層を積み上げる際の数をいい、内包する数は含まない。内包は、層構造としては複層であるが、一の層の中に他の層が埋め込まれている状態であり、積層数の観点において、一の層による単層となる。従って、小幅部３３は、嵩上げ層を含めて大幅部３１よりも多い積層数を有する。 The narrow portion 33 is raised in the thickness direction, which is the compression direction of the gasket 29, by a layer structure having a raised layer. Raising refers to making the narrow portion 33 taller in the thickness direction than if it had the same number of layers as the large portion 31. The number of layers here refers to the number of layers stacked on top of one layer, and does not include the number of layers that are included. An included layer is a multi-layer structure in which another layer is embedded within a layer, and in terms of the number of layers, it becomes a single layer of one layer. Therefore, the narrow portion 33 has a greater number of layers than the large portion 31, including the raised layer.
　かかる構成により、小幅部３３と大幅部３１との間では、ガスケット２９の自由状態において、厚み方向での突出高さの変動を抑制されている。これにより、ガスケット２９の密閉性を向上することが可能となる。なお、突出高さとは、カバー１９からのガスケット２９の突出方向である厚み方向の高さをいう。 This configuration suppresses fluctuations in the protruding height in the thickness direction between the narrow portion 33 and the wide portion 31 when the gasket 29 is in a free state. This makes it possible to improve the sealing performance of the gasket 29. Note that the protruding height refers to the height in the thickness direction, which is the direction in which the gasket 29 protrudes from the cover 19.
　本実施例のガスケット２９の突出高さは、自由状態において小幅部３３と大幅部３１との間で同一になっている。ただし、ガスケット２９の突出高さは、小幅部３３で大幅部３１よりも大きく又は小さくすることも可能である。なお、自由状態とは、ガスケット２９に圧縮荷重が作用していない無負荷状態であり、本実施例においてベース１７の開口部１７ａがカバー１９に閉止される前の閉止前状態である。 The protruding height of the gasket 29 in this embodiment is the same between the narrow portion 33 and the wide portion 31 in the free state. However, it is also possible to make the protruding height of the gasket 29 greater or smaller in the narrow portion 33 than in the wide portion 31. The free state refers to an unloaded state in which no compressive load is acting on the gasket 29, and in this embodiment, refers to the pre-closing state before the opening 17a of the base 17 is closed by the cover 19.
　本実施例において、大幅部３１は、単層であり、小幅部３３は、複層、特に二層となっている。ただし、大幅部３１及び小幅部３３の積層数は、小幅部３３を嵩上げできる限り、任意に設定できる。なお、ここでの大幅部３１の単層は、内包とは異なり、層構造及び積層数においての単層を意味する。以下同様に、単に単層というときは、層構造及び積層数においての単層を意味する。 In this embodiment, the large width portion 31 is a single layer, and the narrow width portion 33 is multiple layers, in particular two layers. However, the number of layers of the large width portion 31 and the narrow width portion 33 can be set arbitrarily as long as the narrow width portion 33 can be raised. Note that the single layer of the large width portion 31 here means a single layer in terms of the layer structure and number of layers, unlike inclusion. Similarly, hereinafter, when simply referring to a single layer, it means a single layer in terms of the layer structure and number of layers.
　単層の大幅部３１は、液状ガスケットをニードルから吐出する際に、幅及び厚み方向での高さが設定される。なお、単に高さというときは、カバー１９からの突出高さとは異なり、圧縮方向である厚み方向の寸法をいう（以下、同じ。）。液状ガスケットをニードルから吐出して硬化させた場合の幅と高さは、単層中で何れか一方のみを大きく又は小さくできない相関を有する。この相関に応じて、大幅部３１は、幅及び高さが設定される。 The width and height in the thickness direction of the large portion 31 of the single layer are set when the liquid gasket is discharged from the needle. Note that when simply referring to height, it refers to the dimension in the thickness direction, which is the compression direction, as opposed to the protruding height from the cover 19 (the same applies below). The width and height when the liquid gasket is discharged from the needle and hardened have a correlation such that one cannot be made larger or smaller than the other within the single layer. The width and height of the large portion 31 are set according to this correlation.
　図７は、単層におけるガスケットの幅と高さの相関の一例を示す。図７の例では、例えば液状ガスケットの吐出量、ニードルの移動速度、及びカバー１９の塗布面と塗布具間の距離等の吐出条件を変更することによって、幅と高さの異なる相関Ｃ１及びＣ２が得られるようになっている。この相関Ｃ１及びＣ２間の範囲で、大幅部３１の幅（及び高さ）の調整がなされる。なお、ニードルの移動速度は、延設方向での移動速度をいう。 Figure 7 shows an example of the correlation between width and height of a single layer gasket. In the example of Figure 7, different correlations C1 and C2 between width and height can be obtained by changing the discharge conditions, such as the amount of liquid gasket dispensed, the needle movement speed, and the distance between the application surface of the cover 19 and the applicator. The width (and height) of the wide portion 31 is adjusted within the range between these correlations C1 and C2. Note that the needle movement speed refers to the movement speed in the extension direction.
　二層の小幅部３３は、第一層３５と、第二層３７とを備えている。 The two-layer narrow section 33 includes a first layer 35 and a second layer 37.
　第一層３５は、小幅部３３においてカバー１９に接する層であり、嵩上げ層としての機能を有する。第二層３７は、第一層３５上に厚み方向で積層された層である。第二層３７は、第一層３５と幅方向で同心状に配置されている。 The first layer 35 is a layer that contacts the cover 19 at the narrow width portion 33, and functions as a bulking layer. The second layer 37 is a layer that is laminated on the first layer 35 in the thickness direction. The second layer 37 is arranged concentrically with the first layer 35 in the width direction.
　第一層３５及び第二層３７は、同材質の液状ガスケットからなる。なお、第一層３５及び第二層３７は、別材質の液状ガスケットであってもよい。第一層３５及び第二層３７は、何れも液状ガスケットをニードルから吐出してカバー１９に塗布する際に、大幅部３１と同様に、幅及び高さが設定される。 The first layer 35 and the second layer 37 are made of liquid gasket of the same material. The first layer 35 and the second layer 37 may be liquid gaskets of different materials. The width and height of the first layer 35 and the second layer 37 are set in the same way as the large width portion 31 when the liquid gasket is discharged from the needle and applied to the cover 19.
　第一層３５及び第二層３７の塗布では、第一層３５を塗布した後に大幅部３１と共に第二層３７が塗布される。第一層３５の塗布は、複数の小幅部３３が存在する場合、小幅部３３に対応した位置においてそれぞれ行われる。第二層３７の塗布は、大幅部３１の塗布と共に小幅部３３に対応した位置において突出条件を変更することで行われる。その後、ガスケット２９全体の硬化が行われる。なお、第一層３５を塗布した後に硬化し、大幅部３１及び第二層３７を塗布した後に別途硬化してもよい。 When applying the first layer 35 and the second layer 37, the first layer 35 is applied, and then the second layer 37 is applied together with the large width portion 31. When multiple small width portions 33 are present, the first layer 35 is applied at the positions corresponding to the small width portions 33. The second layer 37 is applied by changing the protrusion conditions at the positions corresponding to the small width portions 33 together with the application of the large width portions 31. The entire gasket 29 is then hardened. Note that the first layer 35 may be applied and then hardened, and the large width portions 31 and the second layer 37 may be applied and then hardened separately.
　こうして第二層３７は、大幅部３１と一体に形成され、一定の幅及び高さを有する。第二層３７が大幅部３１と一体に形成されていることにより、ガスケット２９の突出高さの変動を抑制して密閉性を向上できる。また、大幅部３１と小幅部３３の第二層３７との間に遷移部３９が備えられ、遷移部３９により大幅部３１と小幅部３３の第二層３７との間が滑らかに遷移し、ガスケット２９の突出高さの変動を抑制して密閉性を向上できる。なお、遷移部３９は、省略することも可能である。 In this way, the second layer 37 is formed integrally with the large portion 31 and has a constant width and height. Because the second layer 37 is formed integrally with the large portion 31, fluctuations in the protruding height of the gasket 29 can be suppressed and airtightness can be improved. In addition, a transition portion 39 is provided between the large portion 31 and the second layer 37 of the narrow portion 33, and the transition portion 39 allows a smooth transition between the large portion 31 and the second layer 37 of the narrow portion 33, suppressing fluctuations in the protruding height of the gasket 29 and improving airtightness. The transition portion 39 may be omitted.
　遷移部３９は、大幅部３１から小幅部３３へ向けて漸次幅及び高さが小さくなっている。漸次幅及び高さが小さくなるとは、連続的に又は段階的に幅及び高さが小さくなることをいう。本実施例の遷移部３９は、幅方向の両側が傾斜した直線状に連続的に幅が小さくなり、高さが放物線状に連続的に小さくなっているが、形状を任意に設定可能である。 The transition section 39 gradually decreases in width and height from the large width section 31 to the small width section 33. "Gradually decreasing width and height" means that the width and height decrease continuously or in stages. In this embodiment, the transition section 39 has a width that decreases continuously in a linear manner with inclination on both sides in the width direction, and a height that decreases continuously in a parabolic manner, but the shape can be set arbitrarily.
　例えば、遷移部３９の幅及び高さの双方が放物線状又は直線状に小さくなってもよい。また、漸次幅及び高さが小さくなるものとして、連続的に幅及び高さが小さくなる複数の部分を幅及び高さが一定の部分で接続した形状、或いは幅及び高さが一定で異なる複数の部分を接続した形状であってもよい。 For example, both the width and height of the transition section 39 may decrease in a parabolic or linear manner. In addition, the gradual decrease in width and height may be a shape in which multiple sections with continuously decreasing width and height are connected by a section with constant width and height, or a shape in which multiple sections with different widths and heights are constant are connected.
　第一層３５の延設方向の端部３５ａは、遷移部３９内に位置している。この端部３５ａは、遷移部３９とは逆に、延設方向で大幅部３１から離れるにつれて漸次幅及び高さが大きくなっている。これにより、遷移部３９と共にガスケット２９の突出高さの変動を抑制することが可能となる。 The end 35a in the extension direction of the first layer 35 is located within the transition section 39. Contrary to the transition section 39, this end 35a gradually increases in width and height as it moves away from the large width section 31 in the extension direction. This makes it possible to suppress fluctuations in the protruding height of the gasket 29 together with the transition section 39.
　漸次幅及び高さが大きくなるとは、連続的又は段階的に幅及び高さが大きくなることをいう。本実施例では、放物線状に連続的に幅及び高さが大きくなっているが、直線状に連続的に幅及び高さが大きくなってもよい。また、漸次幅及び高さが大きくなるものとして、連続的に幅及び高さが大きくなる複数の部分を幅及び高さが一定の部分で接続した形状、或いは幅及び高さが一定で異なる複数の部分を接続した形状であってもよい。 Gradually increasing width and height means that the width and height increase continuously or in stages. In this embodiment, the width and height increase continuously in a parabolic shape, but the width and height may also increase continuously in a linear shape. Furthermore, gradual increasing width and height may be a shape in which multiple parts with continuously increasing width and height are connected by a part with constant width and height, or a shape in which multiple parts with different constant widths and heights are connected.
　端部３５ａを除いた第一層３５の幅及び高さは、第二層３７と同一で一定となっている。このため、幅方向において、第一層３５の縁部と第二層３７の縁部が一致している。なお、端部３５ａを除く第一層３５の幅及び高さは、第二層３７と同一にする必要はなく、第二層３７よりも大きく又は小さくしてもよい。 The width and height of the first layer 35 excluding the end 35a are constant and the same as those of the second layer 37. Therefore, in the width direction, the edge of the first layer 35 and the edge of the second layer 37 are aligned. Note that the width and height of the first layer 35 excluding the end 35a do not need to be the same as those of the second layer 37, and may be larger or smaller than those of the second layer 37.
　何れにしても、小幅部３３と大幅部３１との突出高さの差が、第一層３５による嵩上げがない場合と比較して小さくなるようにする。ガスケット２９の密閉性を確保するには、小幅部３３と大幅部３１との高さの変動を抑制するのが好ましいためである。 In any case, the difference in protruding height between the narrow portion 33 and the wide portion 31 is made smaller than when there is no raising by the first layer 35. This is because in order to ensure the airtightness of the gasket 29, it is preferable to suppress the variation in height between the narrow portion 33 and the wide portion 31.
［記録装置の製造］
　本実施例の記録装置１の製造は、ディスク７を収容するハウジング３のベース１７にカバー１９を取り付けて、ディスク７を収容するハウジング３の空間部３ａを閉止する。 [Manufacturing of Recording Device]
In manufacturing the recording device 1 of this embodiment, the cover 19 is attached to the base 17 of the housing 3 that accommodates the disk 7, and the space 3a of the housing 3 that accommodates the disk 7 is closed.
　すなわち、ガスケット２９が取り付けられたカバー１９をベース１７の開口部１７ａに厚み方向で対向させる。この状態で、カバー１９及びベース１７を相互に近接させ、ガスケット２９の先端部をベース１７のカバー受け部２５に当接させる。 That is, the cover 19 to which the gasket 29 is attached is placed opposite the opening 17a of the base 17 in the thickness direction. In this state, the cover 19 and the base 17 are brought close to each other, and the tip of the gasket 29 is brought into contact with the cover receiving portion 25 of the base 17.
　カバー１９及びベース１７相互をさらに近接させると、ガスケット２９がカバー１９とベース１７との間で圧縮される。このとき、本実施例のガスケット２９は、小幅部３３の突出高さが嵩上げにより大きくされているため、大幅部３１のみならず小幅部３３においても十分に圧縮される。従って、ガスケット２９は、全体としての密閉性を向上することができる。 When the cover 19 and base 17 are brought even closer together, the gasket 29 is compressed between the cover 19 and base 17. At this time, the gasket 29 of this embodiment is sufficiently compressed not only in the large portion 31 but also in the small width portion 33, because the protruding height of the small width portion 33 is increased by raising the height. Therefore, the gasket 29 can improve the overall airtightness.
　また、本実施例では、小幅部３３の表層となる第二層３７と大幅部３１とが一体のため、ガスケット２９の先端部が小幅部３３と大幅部３１との間で滑らかになっている。従って、ガスケット２９は、密閉性を向上することができる。 In addition, in this embodiment, the second layer 37, which is the surface layer of the narrow portion 33, and the wide portion 31 are integrated, so the tip of the gasket 29 is smooth between the narrow portion 33 and the wide portion 31. Therefore, the gasket 29 can improve its sealing performance.
　しかも、本実施例では、小幅部３３の第二層３７と大幅部３１との間の遷移部３９が小幅部３３に向けて漸次幅及び高さが小さくなる。一方で、小幅部３３の第一層３５の端部３５ａが遷移部３９内に位置し、延設方向で大幅部３１から離れるにつれて漸次幅及び高さが漸次大きくなる。このため、より確実にガスケット２９の突出高さの変動を抑制して密閉性が向上される。 Moreover, in this embodiment, the transition portion 39 between the second layer 37 of the narrow portion 33 and the wide portion 31 gradually becomes smaller in width and height toward the narrow portion 33. Meanwhile, the end portion 35a of the first layer 35 of the narrow portion 33 is located within the transition portion 39, and the width and height gradually increase as it moves away from the wide portion 31 in the extension direction. This more reliably suppresses fluctuations in the protruding height of the gasket 29, improving airtightness.
　その後、カバー１９をボルト２７によりベース１７に締結して、ディスク７を収容するハウジング３の空間部３ａが閉止される。 Then, the cover 19 is fastened to the base 17 with the bolts 27 to close the space 3a of the housing 3 that contains the disk 7.
　図８（Ａ）は、本発明の実施例２に係り、ガスケットの小幅部周辺を示す断面図、図８（Ｂ）は、図８（Ａ）のＶＩＩＩ－ＶＩＩＩ線に係る断面図である。なお、実施例２では、実施例１と基本構成が共通するため、対応する構成に同符号を付して、重複した説明を省略する。図８（Ａ）は、ガスケットの延設方向に沿った断面である。また、図８（Ｂ）は、大幅部３１の断面を角張った概念的なものとしている。 FIG. 8(A) is a cross-sectional view showing the periphery of the narrow portion of the gasket according to the second embodiment of the present invention, and FIG. 8(B) is a cross-sectional view taken along line VIII-VIII in FIG. 8(A). Note that since the second embodiment has a common basic configuration to the first embodiment, the same reference numerals are used for corresponding components and redundant explanations will be omitted. FIG. 8(A) is a cross-section along the extension direction of the gasket. Also, FIG. 8(B) shows a conceptual cross-section of the wide portion 31 with an angular shape.
　本実施例は、ガスケット２９の大幅部３１を複層としたものである。すなわち、大幅部３１は、第一層４１及び第二層４３を備えている。 In this embodiment, the large width portion 31 of the gasket 29 is made of multiple layers. That is, the large width portion 31 has a first layer 41 and a second layer 43.
　大幅部３１の第一層４１は、小幅部３３の第一層３５と一体に連続して構成され、小幅部３３の第一層３５と同一の幅及び高さを有している。なお、大幅部３１の第一層４１の幅及び高さは、小幅部３３と同一にする必要はない。 The first layer 41 of the large width portion 31 is integrally and continuously formed with the first layer 35 of the narrow width portion 33, and has the same width and height as the first layer 35 of the narrow width portion 33. Note that the width and height of the first layer 41 of the large width portion 31 do not need to be the same as those of the narrow width portion 33.
　大幅部３１の第二層４３は、実施例１の大幅部３１と同一の幅及び高さを有し、第一層４１を内包する。従って、大幅部３１の第二層４３は、第一層４１が埋め込まれている状態であり、積層数の観点からは単層となっている。 The second layer 43 of the large portion 31 has the same width and height as the large portion 31 of Example 1, and contains the first layer 41. Therefore, the second layer 43 of the large portion 31 is in a state in which the first layer 41 is embedded, and is a single layer in terms of the number of layers.
　この大幅部３１の第二層４３は、小幅部３３の第二層３７と一体に構成され、遷移部３９を介して小幅部３３の第二層３７に連続する。遷移部３９は、実施例１と同様、小幅部３３に向けて漸次幅及び高さが小さくなる。その他の構成は、実施例１と同一である。 The second layer 43 of the large width portion 31 is integral with the second layer 37 of the small width portion 33 and is continuous with the second layer 37 of the small width portion 33 via a transition portion 39. The transition portion 39 is gradually reduced in width and height toward the small width portion 33, as in Example 1. The other configurations are the same as in Example 1.
　かかる構成の実施例２では、実施例１と同様の作用効果を奏することができるのに加え、大幅部３１及び小幅部３３の第一層４１及び３５をまとめて周回状に連続して形成することができるため、ガスケット２９の形成が容易になる。 In the second embodiment having such a configuration, the same effects as those of the first embodiment can be achieved, and in addition, the first layers 41 and 35 of the large width portion 31 and the small width portion 33 can be formed continuously and circumferentially together, making it easier to form the gasket 29.
　図９は、本発明の実施例３に係るガスケットの小幅部周辺を示す断面図である。なお、実施例３では、実施例１と基本構成が共通するため、対応する構成に同符号を付して、重複した説明を省略する。図９は、ガスケットの延設方向に沿った断面である。 Figure 9 is a cross-sectional view showing the vicinity of the narrow portion of the gasket according to the third embodiment of the present invention. Note that since the third embodiment has a basic configuration in common with the first embodiment, the same reference numerals are used for corresponding configurations and duplicated explanations are omitted. Figure 9 is a cross-section along the extension direction of the gasket.
　本実施例は、小幅部３３の第二層３７を嵩上げ層としたものである。 In this embodiment, the second layer 37 of the narrow width portion 33 is used as a raised layer.
　すなわち、小幅部３３の第一層３５は、単層の大幅部３１と一体に設けられている。第一層３５は、遷移部３９を介して大幅部３１に連続する。大幅部３１は、実施例１と同一の幅及び高さを有する。遷移部３９は、小幅部３３へ向けて漸次幅及び高さが小さくなり、小幅部３３の第一層３５は、実施例１の第一層３５と同一の一定の幅及び高さを有する。これにより、遷移部３９から小幅部３３の第一層３５上にわたって凹部４５を形成している。 In other words, the first layer 35 of the narrow portion 33 is integral with the single-layer wide portion 31. The first layer 35 is continuous with the wide portion 31 via the transition portion 39. The wide portion 31 has the same width and height as in Example 1. The transition portion 39 gradually decreases in width and height toward the narrow portion 33, and the first layer 35 of the narrow portion 33 has the same constant width and height as the first layer 35 of Example 1. This forms a recess 45 from the transition portion 39 over the first layer 35 of the narrow portion 33.
　この凹部４５内には、小幅部３３の第二層３７が位置している。本実施例では、凹部４５と第二層３７とが同一の断面形状となっている。第二層３７は、第一層３５上において、実施例１の第二層３７と同一の幅及び高さを有し、漸次幅及び高さが大きくなる端部３７ａが遷移部３９上に位置している。 The second layer 37 of the narrow portion 33 is located within this recess 45. In this embodiment, the recess 45 and the second layer 37 have the same cross-sectional shape. The second layer 37 has the same width and height on the first layer 35 as the second layer 37 of embodiment 1, and the end 37a, which gradually increases in width and height, is located on the transition portion 39.
　なお、第二層３７の断面形状を凹部４５よりも大きく又は小さくしてもよい。第二層３７の断面形状を凹部４５よりも大きくする場合は、第二層３７が大幅部３１よりも厚み方向に突出することになり、第二層３７の断面形状を凹部４５よりも小さくする場合は、第二層３７が大幅部３１よりも厚み方向に凹むことになる。 The cross-sectional shape of the second layer 37 may be larger or smaller than the recess 45. If the cross-sectional shape of the second layer 37 is larger than the recess 45, the second layer 37 will protrude in the thickness direction more than the large portion 31, and if the cross-sectional shape of the second layer 37 is smaller than the recess 45, the second layer 37 will be recessed in the thickness direction more than the large portion 31.
　その他は、実施例１と同一である。 　Otherwise, it is the same as Example 1.
　かかる構成の実施例３でも、実施例１と同様の作用効果を奏することができる。 Even with this configuration, Example 3 can achieve the same effects as Example 1.
　図１０（Ａ）は、本発明の実施例４に係るガスケットの小幅部周辺を示すカバーの底面図であり、図１０（Ｂ）は、図１０（Ａ）のＸ－Ｘ線に係る断面図である。なお、実施例４では、実施例１と基本構成が共通するため、対応する構成に同符号を付して、重複した説明を省略する。図１０（Ｂ）は、小幅部３３の断面を角張った概念的なものとしている。 Fig. 10(A) is a bottom view of a cover showing the periphery of the narrow portion of a gasket according to Example 4 of the present invention, and Fig. 10(B) is a cross-sectional view along line X-X in Fig. 10(A). Note that Example 4 has a common basic configuration to Example 1, so the same reference numerals are used for corresponding components and duplicated explanations will be omitted. Fig. 10(B) shows a conceptual angular cross section of the narrow portion 33.
　本実施例では、小幅部３３を大幅部３１に対して幅方向に偏心させたものである。これに応じ、遷移部３９の形状が実施例１に対して変更されている。ここでの偏心は、ガスケット２９の延設方向に直交する断面における小幅部３３の幅方向の中心と大幅部３１の幅方向の中心との間の幅方向でのずれをいう。 In this embodiment, the narrow portion 33 is offset in the width direction relative to the wide portion 31. Accordingly, the shape of the transition portion 39 is changed from that of the first embodiment. The offset here refers to the deviation in the width direction between the center of the narrow portion 33 in the width direction and the center of the wide portion 31 in the width direction in a cross section perpendicular to the extension direction of the gasket 29.
　小幅部３３は、偏心により、幅方向において外側縁部が大幅部３１の外側縁部と一致している。なお、偏心量は、適宜設定可能であり、小幅部３３の外側縁部と大幅部３１の外側縁部とが一致していなくてもよい。遷移部３９は、幅方向の内側縁部のみ漸次幅が減少するようになっている。その他は、実施例１と同一である。 The narrow width portion 33 is eccentric so that its outer edge coincides with the outer edge of the wide width portion 31 in the width direction. The amount of eccentricity can be set appropriately, and the outer edge of the narrow width portion 33 does not have to coincide with the outer edge of the wide width portion 31. The transition portion 39 is designed so that the width gradually decreases only at the inner edge in the width direction. The rest is the same as in Example 1.
　かかる構成の実施例４でも、実施例１と同様の作用効果を奏することができる。また、小幅部３３と大幅部３１との偏心により、ガスケット２９の圧縮時に幅方向内側への突出又は膨出を抑制できる。 Even with this configuration, Example 4 can achieve the same effect as Example 1. In addition, the eccentricity of the narrow portion 33 and the wide portion 31 can prevent the gasket 29 from protruding or bulging inward in the width direction when compressed.
　図１１は、実施例４の変形例に係るガスケット２９の小幅部３３を示す断面図であり、小幅部３３の断面を角張った概念的なものとしている。 FIG. 11 is a cross-sectional view showing the narrow portion 33 of the gasket 29 according to a modified example of the fourth embodiment, in which the cross section of the narrow portion 33 is conceptually angular.
　図１１の変形例では、小幅部３３の第一層３５と第二層３７とを幅方向に偏心させたものである。すなわち、第二層３７は、第一層３５よりも幅及び高さが小さく設定され、第一層３５に対して幅方向外側に偏心している。この偏心に応じ、第一層３５の外側縁部と第二層３７の外側縁部とが幅方向で一致している。 In the modified example shown in FIG. 11, the first layer 35 and the second layer 37 of the narrow width portion 33 are offset in the width direction. That is, the second layer 37 is set to be smaller in width and height than the first layer 35, and is offset outward in the width direction relative to the first layer 35. Due to this offset, the outer edge of the first layer 35 and the outer edge of the second layer 37 coincide in the width direction.
　なお、ここでの偏心は、ガスケット２９の延設方向に直交する断面における小幅部３３の第一層３５の幅方向の中心と小幅部３３の第二層３７の幅方向の中心との間の幅方向でのずれをいう。偏心量は、適宜設定可能であり、第一層３５の外側縁部と第二層３７の外側縁部とが一致していなくてもよい。図１１の変形例は、実施例１～実施例４の何れかの小幅部３３に適用可能である。 Note that eccentricity here refers to the deviation in the width direction between the center of the width direction of the first layer 35 of the narrow width portion 33 and the center of the width direction of the second layer 37 of the narrow width portion 33 in a cross section perpendicular to the extension direction of the gasket 29. The amount of eccentricity can be set appropriately, and the outer edge of the first layer 35 and the outer edge of the second layer 37 do not need to coincide. The modified example in Figure 11 can be applied to the narrow width portion 33 of any of Examples 1 to 4.
　かかる変形例では、第一層３５と第二層３７との偏心により、ガスケット２９の圧縮時に幅方向内側への突出又は膨出を抑制できる。 In this modified example, the eccentricity of the first layer 35 and the second layer 37 can prevent the gasket 29 from protruding or bulging inward in the width direction when compressed.
１　記録装置
３　ハウジング
３ａ　空間部
５　内部機構
１７　ベース
１７ａ　開口部
１９　カバー
１９ａ　外周部
２５　カバー受け部
２９　ガスケット
３１　大幅部
３３　小幅部
３５　第一層（小幅部）
３５ａ　端部
３７　第二層（小幅部）
３７ａ　端部
３９　遷移部
４１　第一層（大幅部）
４３　第二層（大幅部）
 

  1 Recording device 3 Housing 3a Space portion 5 Internal mechanism 17 Base 17a Opening 19 Cover 19a Outer periphery 25 Cover receiving portion 29 Gasket 31 Large width portion 33 Narrow width portion 35 First layer (narrow width portion)
35a End 37 Second layer (narrow width portion)
37a End 39 Transition section 41 First layer (wide section)
43 Second layer (wide part)

Claims (10)

  1. 　空間部に内部機構を収容するハウジングのベースの開口部に取り付けられて前記空間部を閉止するカバーであって、
    　前記ベースに受けられる外周部と、
    　該外周部に沿って周回状に延設され、前記外周部から突出して前記ベースへの当接により圧縮されるガスケットとを備え、
    　前記ガスケットは、前記周回状の内外にわたる幅が相対的に大きい大幅部及び該幅が相対的に小さい小幅部を備え、
    　前記小幅部は、嵩上げ層を有する層構造によって前記ガスケットの圧縮方向に嵩上げされた、
    　カバー。     A cover is attached to an opening of a base of a housing that accommodates an internal mechanism in a space and closes the space,
    An outer periphery that is received on the base;
    a gasket that extends circumferentially along the outer periphery, protrudes from the outer periphery, and is compressed by contact with the base,
    The gasket has a large width portion having a relatively large width from inside to outside of the circumferential shape and a small width portion having a relatively small width,
    The narrow width portion is raised in the compression direction of the gasket by a layer structure having a raised layer.
    cover.
  2. 　請求項１のカバーであって、
    　前記小幅部は、前記嵩上げ層としての第一層と、該第一層上に積層された第二層とを備え、
    　前記大幅部は、前記小幅部の前記第二層と一体に形成され、
    　前記小幅部の前記第二層と前記大幅部との間は、前記大幅部から前記小幅部へ向けて漸次幅及び前記圧縮方向での高さが小さくなる遷移部を備えた、
    　カバー。     2. The cover of claim 1,
    The narrow width portion includes a first layer as the raised layer and a second layer laminated on the first layer,
    the large width portion is integrally formed with the second layer of the small width portion,
    Between the second layer of the narrow portion and the wide portion, a transition portion is provided in which the width and the height in the compression direction are gradually reduced from the wide portion to the narrow portion.
    cover.
  3. 　請求項２のカバーであって、
    　前記ガスケットの延設方向における前記小幅部の前記第一層の端部は、前記遷移部内に位置し、前記延設方向で前記大幅部から離れるにつれて幅及び前記圧縮方向での高さが漸次大きくなる、
    　カバー。     The cover of claim 2,
    an end portion of the first layer of the narrow portion in the extension direction of the gasket is located within the transition portion, and a width and a height in the compression direction gradually increase as the end portion moves away from the wide portion in the extension direction.
    cover.
  4. 　請求項２のカバーであって、
    　前記大幅部は、前記小幅部の前記第一層及び前記第二層とそれぞれ一体の第一層及び第二層を備え、
    　前記大幅部の前記第二層は、前記大幅部の前記第一層を内包する、
    　カバー。     The cover of claim 2,
    the large width portion includes a first layer and a second layer that are integral with the first layer and the second layer of the small width portion, respectively;
    The second layer of the large portion contains the first layer of the large portion.
    cover.
  5. 　請求項１～３の何れか一項のカバーであって、
    　前記大幅部は、単層である、
    　カバー。     The cover according to any one of claims 1 to 3,
    The wide portion is a single layer.
    cover.
  6. 　請求項１のカバーであって、
    　前記小幅部は、第一層と、該第一層上に積層された前記嵩上げ層としての第二層とを備え、
    　前記大幅部は、前記小幅部の前記第一層と一体に形成され、
    　前記小幅部の前記第一層と前記大幅部との間は、前記大幅部から前記小幅部へ向けて幅及び前記圧縮方向での高さが漸次小さくなる遷移部を備えた、
    　カバー。     2. The cover of claim 1,
    The narrow width portion includes a first layer and a second layer as the raised layer laminated on the first layer,
    the large width portion is integrally formed with the first layer of the small width portion,
    Between the first layer of the narrow width portion and the wide width portion, a transition portion is provided in which the width and the height in the compression direction are gradually reduced from the wide width portion to the narrow width portion.
    cover.
  7. 　請求項６のカバーであって、
    　前記ガスケットの延設方向における前記小幅部の前記第二層の端部は、前記遷移部上に位置し、前記延設方向で前記大幅部から離れるにつれて漸次幅及び前記圧縮方向での高さが漸次大きくなる、
    　カバー。     The cover of claim 6,
    An end of the second layer of the narrow portion in the extension direction of the gasket is located on the transition portion, and the width and the height in the compression direction gradually increase as the end of the second layer of the narrow portion in the extension direction moves away from the wide portion.
    cover.
  8. 　請求項１～４、６、及び７のカバーであって、
    　前記小幅部及び前記大幅部は、幅方向において偏心している、
    　カバー。     A cover according to claims 1 to 4, 6 and 7,
    The narrow portion and the wide portion are eccentric in the width direction.
    cover.
  9. 　請求項２～４、６、及び７のカバーであって、
    　前記小幅部の前記第一層及び前記第二層は、幅方向において偏心している、
    　カバー。     A cover according to claims 2 to 4, 6 and 7,
    The first layer and the second layer of the narrow width portion are eccentric in the width direction.
    cover.
  10. 　請求項１のカバーを用いた記録装置であって、
    　前記カバーと共にハウジングを構成し閉止された空間部内に内部機構を収容するベースを備え、
    　前記ベースは、前記カバーが取り付けられる開口部と、前記カバーの前記外周部を前記ガスケットを介在させつつ受けるカバー受け部とを備えた、
    　記録装置。
     
     

          A recording device using the cover of claim 1,
    a base that constitutes a housing together with the cover and accommodates an internal mechanism in a closed space;
    The base includes an opening to which the cover is attached, and a cover receiving portion that receives the outer periphery of the cover with the gasket interposed therebetween.
    Recording device.
PCT/JP2023/034526 2022-09-30 2023-09-22 Cover and recording device utilizing said cover WO2024070952A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022158917 2022-09-30
JP2022-158917 2022-09-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006073067A (en) * 2004-08-31 2006-03-16 Toshiba Corp Disk device
WO2008114484A1 (en) * 2007-03-16 2008-09-25 Nhk Spring Co., Ltd. Cover seal structure
WO2011024812A1 (en) * 2009-08-26 2011-03-03 Nok株式会社 Metal gasket and method for producing die for metal gasket
JP6840728B2 (en) * 2016-03-23 2021-03-10 日本発條株式会社 Cover assembly, hard disk drive and its manufacturing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006073067A (en) * 2004-08-31 2006-03-16 Toshiba Corp Disk device
WO2008114484A1 (en) * 2007-03-16 2008-09-25 Nhk Spring Co., Ltd. Cover seal structure
WO2011024812A1 (en) * 2009-08-26 2011-03-03 Nok株式会社 Metal gasket and method for producing die for metal gasket
JP6840728B2 (en) * 2016-03-23 2021-03-10 日本発條株式会社 Cover assembly, hard disk drive and its manufacturing method

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