disc device

Abstract

The present application provides a disc device capable of maintaining the air tightness of a case and improving assembly accuracy. The disc device of the present embodiment includes: a case having a base body with a bottom wall (12a) and a side wall (12b) erected on the peripheral portion of the bottom wall, a cover, and at least two base body side positioning portions (PT2) provided on the bottom wall in the region overlapping with the side wall, the case enclosing a gas having a lower density than air; a plurality of discs provided in the case; a motor supporting and driving the discs; a plurality of heads; and a printed circuit substrate (40) mounted on the outer surface of the bottom wall. The printed circuit substrate has at least two substrate side positioning portions (PP2) engaging with the base body side positioning portions, respectively. One of the base body side positioning portions and the substrate side positioning portions includes a pin (PP2) extending substantially perpendicularly relative to the bottom wall, and the other includes a hole (PT2) for the pin to fit into.

Description

[0001] This application enjoys priority based on Japanese Patent Application No. 2022-148719 (filed on September 20, 2022). This application incorporates the entire contents of the basic application by reference to that basic application. Technical Field

[0002] Embodiments of the present invention relate to a disk device. Background Technology

[0003] As a disk drive device, a disk drive has a housing with a base and a top cover, inside which a rotating disk and an actuator supporting the read / write head are housed. As a method to improve the performance of a disk drive, a method has been proposed that involves sealing the housing with a low-density gas such as helium to reduce the rotational resistance of the disk and the read / write head.

[0004] In such a disk drive, a hermetic enclosure is formed by airtightly fixing the top cover to the base of the enclosure, thus improving the airtightness of the enclosure. To transmit electrical signals from the read / write heads located inside the enclosure to the control circuit board located outside the device, a relay connector is provided that penetrates the bottom wall of the enclosure. The control circuit board is mounted on the base in a positioned state relative to the base by engaging with a positioning boss and the relay connector located on the bottom wall of the base.

[0005] The aforementioned positioning bosses are typically located in the bottom wall of the substrate, overlapping with the internal space (gas-filled area) of the substrate. In recent years, there has been a trend towards increasing the number of disks installed, accompanied by a trend towards thinner substrate walls. When machining positioning bosses or similar components in such thin-walled sections, the risk of low-density gas leakage increases. Furthermore, when relay connectors are also used for positioning, the installation accuracy of the relay connectors needs to be improved, necessitating higher machining accuracy of the substrate. Consequently, the manufacturability of the disk assembly, including the substrate, may decrease. Summary of the Invention

[0006] Embodiments of the present invention provide a tray device capable of maintaining the airtightness of the housing and seeking to improve assembly accuracy.

[0007] The disk device of this embodiment includes: a housing having: a base having a bottom wall and frame-shaped side walls erected on the periphery of the bottom wall; a cover fixed to the side walls; and at least two base-side positioning portions disposed on the bottom wall in areas overlapping with the side walls. The housing is sealed with a gas less dense than air; multiple disks disposed within the housing; a motor supporting and rotating the disks; multiple heads processing data on the disks; and a printed circuit board mounted on the outer surface of the bottom wall and controlling the movement of the motor and the heads. A plurality of connectors and electronic components are mounted on the board, and at least two board-side positioning portions respectively engaging with the base-side positioning portions. One of the base-side positioning portions and the board-side positioning portions includes a pin extending substantially perpendicularly relative to the bottom wall, and the other includes a hole for the pin to engage. Attached Figure Description

[0008] Figure 1 This is a disassembled perspective view showing the internal structure of the hard disk drive (HDD) according to the first embodiment.

[0009] Figure 2 This is a perspective view showing the rear side of the HDD.

[0010] Figure 3 This is a perspective view of the control circuit board of the HDD.

[0011] Figure 4 This is a disassembled perspective view showing the back side of the substrate and the control circuit board.

[0012] Figure 5 This is a perspective view showing the interface connector mounting portion of the control circuit board.

[0013] Figure 6 It is along Figure 2 A cross-sectional view of the housing and positioning part of the control circuit board of line AA.

[0014] Figure 7 It is along Figure 2 A cross-sectional view of the positioning part of the housing of line BB.

[0015] Figure 8 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the second embodiment.

[0016] Figure 9 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the second embodiment.

[0017] Figure 10This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the second embodiment.

[0018] Figure 11 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the third embodiment.

[0019] Figure 12 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the third embodiment.

[0020] Figure 13 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the third embodiment.

[0021] Figure 14 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the fourth embodiment.

[0022] Figure 15 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the fourth embodiment.

[0023] Figure 16 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the fourth embodiment.

[0024] Figure 17 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the fifth embodiment.

[0025] Figure 18 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the fifth embodiment.

[0026] Figure 19 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the fifth embodiment.

[0027] Figure 20 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the sixth embodiment.

[0028] Figure 21 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the sixth embodiment.

[0029] Figure 22 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the sixth embodiment.

[0030] Figure 23This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the 7th embodiment.

[0031] Figure 24 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the 7th embodiment.

[0032] Figure 25 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the 7th embodiment.

[0033] Figure 26 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the 8th embodiment.

[0034] Figure 27 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the eighth embodiment.

[0035] Figure 28 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the 8th embodiment.

[0036] Figure 29 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the 9th embodiment.

[0037] Figure 30 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the 9th embodiment.

[0038] Figure 31 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the 9th embodiment.

[0039] Figure 32 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the 10th embodiment.

[0040] Figure 33 This is a perspective view showing the interface connector mounting portion of the control circuit board in the HDD according to the 10th embodiment.

[0041] Figure 34 This is a cross-sectional view of the housing and the positioning portion of the control circuit board in the HDD according to the 10th embodiment.

[0042] [Explanation of Labels in the Attached Image]

[0043] 10… Housing, 12… Base, 12a… Bottom wall, 12b… Side wall, 14… Inner cover, 16… Outer cover (top cover), 17… Magnetic head, 18… Disk, 19… Spindle motor, 22… Head actuator, 40… Printed circuit board, 42… Relay connector, 44… Interface connector, 44a… Housing, 44b… Terminal, P1… First positioning part, P2… Second positioning part, PP1… First positioning pin, PT1… First positioning hole, PP2… Second positioning pin, PT2… Second positioning hole Detailed Implementation

[0044] Hereinafter, the disk device according to the embodiment will be described with reference to the accompanying drawings.

[0045] Furthermore, the disclosure is merely one example, and solutions that can be readily conceived by those skilled in the art, while maintaining the spirit of the invention, are naturally included within the scope of this invention. Additionally, the drawings sometimes schematically represent the width, thickness, shape, etc., of various parts compared to the actual form to make the explanation clearer, but this is only an example and does not limit the interpretation of the invention. Furthermore, in this specification and the various drawings, sometimes the same reference numerals are used for elements that have been previously described in the accompanying drawings, and detailed descriptions are appropriately omitted.

[0046] Hereinafter, the hard disk drive (HDD) according to the embodiment will be described in detail as a disk device.

[0047] (First Embodiment)

[0048] Figure 1 This is a disassembled perspective view showing the internal structure of the HDD according to the first embodiment.

[0049] As shown in the figure, the HDD has a generally rectangular housing 10. The housing 10 has a rectangular box-shaped base 12 with an opening on the upper surface, an inner cover 14 that is threaded onto the base 12 by a plurality of screws 13 and closes the upper opening of the base 12, and an outer cover (top cover) 16 that overlaps the inner cover 14 and is welded to the base 12 at its periphery. The base 12 has a rectangular bottom wall 12a that is spaced apart from the inner cover 14 and frame-shaped side walls 12b that are erected along the periphery of the bottom wall 12a, for example, made of aluminum in one piece. The side walls 12b include a pair of long side walls and a pair of short side walls that are opposite each other. A generally rectangular frame-shaped fixing rib 12c is provided protruding from the upper end face of the side wall 12b.

[0050] The inner cover 14 is formed into a rectangular plate, for example, using stainless steel. The periphery of the inner cover 14 is threadedly locked to the upper surface of the side wall 12b of the base 12 by screws 13, and fixed to the inner side of the fixing rib 12c. The outer cover 16 is formed into a rectangular plate, for example, using aluminum. The outer cover 16 has a planar dimension slightly larger than that of the inner cover 14. The periphery of the outer cover 16 is welded to the fixing rib 12c of the base 12, and is hermetically fixed. Using the base 12 and the inner cover 14, a hermetically sealed internal space (gas-filled area) AR is defined.

[0051] Each of the inner cover 14 and the outer cover 16 has vent holes 56 and 58 that connect the inside of the housing 10 to the outside. Air in the internal space AR of the housing 10 is discharged through the vent holes 56 and 58, and then, a low-density gas (inert gas), such as helium, with a density lower than air is sealed into the internal space AR of the housing 10 through these vent holes 56 and 58. On the outer surface of the outer cover 16, a sealing element (sealing body) 60 is attached in such a way as to block the vent holes 58.

[0052] like Figure 1 As shown, within the housing 10, multiple disks 18, for example, serving as recording media, are provided, along with a spindle motor 19 serving as the drive unit to support and rotate the disks 18. The spindle motor 19 is mounted on the bottom wall 12a. Each disk 18 is, for example, formed with a diameter of 95 mm (3.5 inches), and has a magnetic recording layer on its upper and / or lower surfaces. The disks 18 are coaxially fitted into a hub (not shown) of the spindle motor 19, and then clamped by clamping springs 20. Thus, each disk 18 is supported in a position parallel to the bottom wall 12a of the base 12. The disks 18 are rotated at a predetermined speed by the spindle motor 19. Furthermore, the number of disks 18 is not limited to 10; it can also be 9 or less, or 11 or more.

[0053] Inside the housing 10, there are multiple magnetic heads 17 for recording and reproducing information on the disk 18, and an actuator assembly 22 that supports these magnetic heads 17 so that they can move freely relative to the disk 18. Additionally, inside the housing 10, there is a voice coil motor (hereinafter referred to as VCM) 24 that rotates and positions the actuator assembly 22, a ramp loading mechanism 25 that holds the magnetic heads 17 in an unloading position away from the disk 18 when they move to the outermost periphery of the disk 18, and a baseboard unit (FPC unit) 21 on which electronic components such as a conversion connector are mounted. The ramp loading mechanism 25 has a ramp 80 that is erected on the base 12.

[0054] The actuator assembly 22 includes: an actuator block 29 with a through hole, a bearing unit (unit bearing) 28 disposed within the through hole, a plurality of arms 32 extending from the actuator block 29, for example 11 arms 32, a suspension assembly (head universal joint assembly: sometimes also called HGA) 30 mounted on each arm 32, and a magnetic head 17 supported on the suspension assembly 30. A support shaft 26 is erected on the bottom wall 12a. The actuator block 29 is supported by the bearing unit 28 and is rotatable about the support shaft 26.

[0055] The FPC unit 21 integrally comprises a generally rectangular base portion 21a bent into an L shape, an elongated strip-shaped relay portion 21b extending from one side edge of the base portion 21a, and a connecting portion 21c continuously disposed with the front end of the relay portion 21b. The base portion 21a, the relay portion 21b, and the connecting portion 21c are formed of a flexible printed wiring substrate (FPC).

[0056] Electronic components such as the conversion connector and multiple capacitors (described later) are mounted on the base portion 21a and electrically connected to the wiring of the FPC. The base portion 21a is disposed on the bottom wall 12a of the base 12. The relay portion 21b extends from the side edge of the base portion 21a toward the actuator block 29 of the actuator assembly 22. The joint portion 21c provided at the extended end of the relay portion 21b is attached to and threadedly secured to the side surface (disposing surface) of the actuator block 29. A plurality of connection pads are provided in the joint portion 21c. Each magnetic head 17 of the actuator assembly 22 is electrically connected to the connection pads of the joint portion 21c via a wiring component (flexible member). Thus, the FPC unit 21 is electrically connected to the magnetic head 17 and the voice coil of the VCM 24.

[0057] Figure 2 This is a 3D view showing the back side of the HDD. Figure 3 It is a three-dimensional view of a printed circuit board (control circuit board, printed circuit board assembly: sometimes also called PCBA).

[0058] like Figure 2 As shown, a printed circuit board 40 is provided on the outer surface of the bottom wall 12a of the substrate 12 and is threadedly fixed to the bottom wall 12a. The printed circuit board 40 has an end edge 40a located approximately aligned with one of the short sides (the short side away from the disk 18) of the bottom wall 12a, and a pair of side edges 40b and 40c extending approximately orthogonally to the end edge 40a and located approximately aligned with a pair of long sides of the bottom wall 12a. The printed circuit board 40 has an outer surface S1 exposed to the outside and an inner surface S2 on the opposite side. The printed circuit board 40 is mounted on the substrate 12 with the inner surface S2 facing the bottom wall 12a.

[0059] like Figure 3As shown, on the inner surface S2 of the printed circuit board 40, for example, are mounted: an interface connector 44 for connecting to an external device; a relay connector 42 for connecting to the connector on the base 12 side; driver ICs 43a and 43b; a connector terminal 43c for connecting to the spindle motor 19; and several other electronic components not shown. The printed circuit board 40 constitutes a control circuit board for controlling the operation of the spindle motor 19 and controlling the operation of the VCM 24 and the magnetic head 17 via the FPC unit 21.

[0060] like Figure 2 and Figure 3 As shown, the printed circuit board 40 has an elongated rectangular notch (recess) 44d formed on the end edge 40a side. The long side of the notch 44d extends substantially parallel to the end edge 40a side. An interface connector 44 is mounted on the printed circuit board 40 along the end edge 40a, mostly opposite the notch 44d. The interface connector 44 has, for example, an elongated rectangular housing 44a formed of synthetic resin, and multiple connecting terminals 44b arranged side by side within the housing 44a. The housing 44a is fixed to the inner surface S2 and covers the notch 44d. The connecting terminals 44b protrude to the notch 44d and the end edge 40a side of the printed circuit board 40. In this embodiment, a first locating pin PP1 and a second locating pin PP2 are protruding from the housing 44a. The first locating pin PP1 and the second locating pin PP2 are disposed apart from each other in the long dimension direction of the end edge 40a, and extend in a direction substantially perpendicular to the inner surface S2 of the printed circuit board 40.

[0061] The relay connector 42 is mounted on the inner surface S2 near the interface connector 44. The relay connector 42 is, for example, composed of a stacked connector that stands approximately vertically from the inner surface S2. The relay connector 42 is connected to the relay connector 51, which will be described later, and is located on the bottom wall 12a side.

[0062] The driver IC 42b and connector terminal 43c are mounted on the end opposite to the end edge 40a. The connector terminal 43c is connected to one end of the connecting FPC 30 attached to the bottom wall 12a. The other end of the connecting FPC 30 is electrically connected to the spindle motor 19. Thus, the printed circuit board 40 is electrically connected to the spindle motor 19 via the connector terminal 43c and the connecting FPC 30.

[0063] Figure 4 This is a disassembled perspective view showing the back side of the substrate and the printed circuit board.

[0064] As shown in the figure, bosses 46 of predetermined height are provided at multiple locations on the outer surface of the bottom wall 12a. Each boss 46 has a screw hole (threaded hole) 47.

[0065] In the bottom wall 12a, an elongated rectangular recess 48 is formed in the region overlapping with the side wall 12b on the shorter side. The recess 48 extends along the longitudinal direction of the side wall 12b and opens onto the outer surfaces of the bottom wall 12a and the side wall 12b. The bottom surface 48a of the recess 48 extends substantially parallel to the outer surface of the bottom wall 12a.

[0066] On the bottom surface 48a, a first positioning hole PT1 and a second positioning hole PT2 are provided as a base side positioning part. The first positioning hole PT1 and the second positioning hole PT2 are separated from each other in the longitudinal direction of the side wall 12b, and extend in a direction that is substantially perpendicular to the bottom surface 48a.

[0067] Near the side wall 12b, a relay connector unit 52 is provided on the bottom wall 12a. The relay connector unit 52 has a relay substrate 50 fixed to the bottom wall 12a, a first relay connector 51 mounted on the outer surface of the relay substrate 50, and a second relay connector (not shown) mounted on the inner surface of the relay substrate 50. The first relay connector 51 protrudes from the outer surface of the bottom wall 12a. The second relay connector extends into the substrate 12 through a through-hole formed in the bottom wall 12a and is electrically connected to the aforementioned FPC unit 21.

[0068] Figure 5 This is a perspective view showing the interface connector mounting portion of the printed circuit board.

[0069] As described above, an interface connector 44 is fixed to the inner surface S2 of the printed circuit board 40. The housing 44a of the interface connector 44 integrally has a first positioning pin PP1 and a second positioning pin PP2 as substrate-side positioning portions. The first positioning pin PP1 and the second positioning pin PP2 are disposed apart from each other in the longitudinal direction of the end edge 40a, and extend in a direction substantially perpendicular to the inner surface S2 of the printed circuit board 40. The first positioning pin PP1 and the second positioning pin PP2 are disposed at positions that can engage with the first positioning hole PT1 and the second positioning hole PT2, and are formed in a shape and size that can engage with the first positioning hole PT1 and the second positioning hole PT2.

[0070] like Figure 2 and Figure 4 As shown, the printed circuit board 40 configured above is placed at a predetermined position on the bottom wall 12a with its inner surface S2 facing the substrate 12, and is threadedly locked to the bottom wall 12a by multiple fixing screws M1. Each fixing screw M1 passes through a through hole in the printed circuit board 40 and is screwed into a screw hole 47 in the boss 46. The relay connector 42 is fitted into the first relay connector 51 of the relay connector unit 52. In addition, the connector terminal portion 43c is connected to one end of the FPC 30. The interface connector 44 is located in the recess 48 of the substrate 12.

[0071] Figure 6 It is along Figure 2 A cross-sectional view of the housing and the positioning part of the printed circuit board of line AA. Figure 7 It is along Figure 2 A sectional view of the box body of line BB.

[0072] As shown in the figure, the interface connector 44 is located within the recess 48 of the base 12, approximately parallel to the bottom surface 48a. The first positioning pin PP1 and the second positioning pin PP2 are respectively engaged with the first positioning hole PT1 and the second positioning hole PT2. Thus, the printed circuit board 40 is positioned relative to the base 12 at a predetermined location.

[0073] The first positioning pin PP1 and the first positioning hole PT1 constitute the first positioning part P1, which positions the printed circuit board 40 relative to the substrate 12 by mutual fitting. Similarly, the second positioning pin PP2 and the second positioning hole PT2 constitute the second positioning part P2, which positions the printed circuit board 40 relative to the substrate 12 by mutual fitting.

[0074] like Figure 7 As shown, the first positioning part P1 and the second positioning part P2 are respectively disposed in the region W1 of the bottom wall 12a of the substrate 12 that overlaps with the side wall 12b. When the direction orthogonal to the bottom wall 12a is set as the thickness direction of the housing 10, the first positioning part P1 and the second positioning part P2 are disposed in the region that does not overlap with the internal space IR of the housing 10 in the thickness direction. Therefore, the thickness (second thickness) t1 of the housing in the region (second part) where the first positioning part P1 and the second positioning part P2 are disposed is thicker than the thickness (first thickness) t2 of at least a part (first part) of the bottom wall 12a. As described above, the printed circuit board 40 is fixed to the substrate 12 by a screw M1 in a threaded stop state when it is positioned relative to the substrate 12 by the two positioning parts P1 and P2.

[0075] According to the HDD configured as described above, the first positioning part P1 and the second positioning part P2 for positioning the printed circuit board 40 are provided in a direction orthogonal to the bottom wall 12a in a region that does not overlap with the internal space IR of the housing 10, that is, in the region of the bottom wall 12a that overlaps with the side wall 12b. Therefore, it is not necessary to provide positioning pins or positioning holes in the thinner areas of the bottom wall 12a, and gas leakage in the bottom wall 12a can be suppressed. As a result, the airtightness of the substrate 12 can be maintained at a high level, thereby improving the reliability of the HDD. Moreover, since the relay connector unit 52 and the relay connector 42 are not used as positioning references, the processing accuracy of the relay connector unit 52 and the substrate 12 can be relaxed. Therefore, the manufacturability of the HDD including the substrate 12 is improved.

[0076] In summary, according to the first embodiment, a tray device is provided that can maintain the airtightness of the housing and improve assembly accuracy.

[0077] Next, the HDD involved in other embodiments will be described. Furthermore, in the other embodiments described below, the same reference numerals will be used for the parts that are the same as those in the first embodiment described above, and their detailed descriptions will be simplified or omitted, with a focus on the parts that are different from the first embodiment.

[0078] The positioning pin and positioning hole constituting the positioning part can be provided on one side of the printed circuit board 40 and on the other side of the substrate 12.

[0079] (Second Implementation)

[0080] Figure 8 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the second embodiment. Figure 9 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 10 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the second embodiment.

[0081] As shown in the figure, the HDD includes a first positioning portion P1 and a second positioning portion P2 for positioning the printed circuit board 40 relative to the housing 10. In the second embodiment, the first positioning pin PP1 (substrate-side positioning portion) of the first positioning portion P1 is provided on the printed circuit board 40 itself, located between one side edge of the printed circuit board 40 and the interface connector 44. The first positioning pin PP1 protrudes substantially perpendicularly from the inner surface S2 of the printed circuit board 40. The first positioning hole PT1 (substrate-side positioning portion) is provided in the bottom wall 12a of the substrate 12 in the region overlapping with the side wall 12b, in this case, at the corner of the bottom wall 12a.

[0082] The second positioning pin PP2 (substrate-side positioning part) of the second positioning part P2 is integrally provided on the housing 44a of the interface connector 44. The second positioning pin PP2 protrudes substantially perpendicularly relative to the inner surface S2 of the printed circuit board 40. The second positioning hole PT2 (substrate-side positioning part) is provided in the area overlapping with the sidewall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a.

[0083] like Figure 10As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0084] In the second embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0085] (Third Implementation)

[0086] Figure 11 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the third embodiment. Figure 12 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 13 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the third embodiment.

[0087] As shown in the figure, in the third embodiment, the first positioning pin PP1 (substrate-side positioning part) of the first positioning part P1 is provided on the printed circuit board 40 itself, located between one side edge of the printed circuit board 40 and the interface connector 44. The first positioning pin PP1 protrudes substantially perpendicularly from the inner surface S2 of the printed circuit board 40. The first positioning hole PT1 (substrate-side positioning part) is provided in the bottom wall 12a of the substrate 12 in the area overlapping with the side wall 12b, which is the corner of the bottom wall 12a in this case.

[0088] The second positioning pin PP2 (substrate-side positioning part) of the second positioning part P2 is provided on the printed circuit board 40 itself, located between the other side edge of the printed circuit board 40 and the interface connector 44. The second positioning pin PP2 protrudes approximately perpendicularly from the inner surface S2 of the printed circuit board 40. The second positioning hole PT2 (substrate-side positioning part) is provided in the bottom wall 12a of the substrate 12 in the area overlapping with the side wall 12b, here near the corner of the bottom wall 12a.

[0089] like Figure 11 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0090] In the third embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0091] (Fourth implementation)

[0092] Figure 14 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the fourth embodiment. Figure 15 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 16 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the fourth embodiment.

[0093] As shown in the figure, in the fourth embodiment, the first positioning pin PP1 (substrate-side positioning part) of the first positioning part P1 is integrally provided on the housing 44a of the interface connector 44. The first positioning pin PP1 protrudes substantially perpendicularly relative to the inner surface S2 of the printed circuit board 40. The first positioning hole PT1 (base-side positioning part) is provided in the bottom wall 12a of the base 12 in the region overlapping with the side wall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a.

[0094] The second positioning pin PP2 (base-side positioning part) of the second positioning part P2 protrudes from the area overlapping with the side wall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a. The second positioning pin PP2 protrudes perpendicularly relative to the outer surface of the bottom wall 12a. The second positioning hole PT2 (substrate-side positioning part) is provided in the area overlapping with the side wall 12b, which is the housing 44a of the interface connector 44.

[0095] like Figure 16 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0096] In the fourth embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0097] (Fifth Embodiment)

[0098] Figure 17 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the fifth embodiment. Figure 18 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 19This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the fifth embodiment.

[0099] As shown in the figure, in the fifth embodiment, the first positioning pin PP1 of the first positioning part P1 is disposed on the printed circuit board 40 itself, located between one side edge of the printed circuit board 40 and the interface connector 44. The first positioning pin PP1 protrudes substantially perpendicularly from the inner surface S2 of the printed circuit board 40. The first positioning hole PT1 is disposed in the bottom wall 12a of the substrate 12 in the region overlapping with the side wall 12b, which is the corner of the bottom wall 12a in this case.

[0100] The second positioning pin PP2 of the second positioning part P2 protrudes from the area overlapping with the side wall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a. The second positioning pin PP2 protrudes perpendicularly relative to the outer surface of the bottom wall 12a. The second positioning hole PT2 is provided in the area overlapping with the side wall 12b, which is the housing 44a of the interface connector 44.

[0101] like Figure 19 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0102] In the fifth embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0103] (Sixth Embodiment)

[0104] Figure 20 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the sixth embodiment. Figure 21 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 22 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the sixth embodiment.

[0105] As shown in the figure, in the sixth embodiment, the first positioning pin PP1 (substrate-side positioning part) of the first positioning part P1 is provided in the bottom wall 12a of the substrate 12 in the area overlapping with the side wall 12b, which is the corner of the bottom wall 12a. The first positioning pin PP1 protrudes substantially vertically from the bottom wall 12a. The first positioning hole PT1 (substrate-side positioning part) is provided in the printed circuit board 40 itself, located between one side edge of the printed circuit board 40 and the interface connector 44.

[0106] The second positioning pin PP2 (substrate-side positioning part) of the second positioning part P2 is integrally provided on the housing 44a of the interface connector 44. The second positioning pin PP2 protrudes substantially perpendicularly relative to the inner surface S2 of the printed circuit board 40. The second positioning hole PT2 (substrate-side positioning part) is provided in the area overlapping with the side wall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a.

[0107] like Figure 22 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0108] In the sixth embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0109] (Seventh Embodiment)

[0110] Figure 23 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the seventh embodiment. Figure 24 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 25 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the 8th embodiment.

[0111] As shown in the figure, in the seventh embodiment, the first positioning pin PP1 of the first positioning part P1 is provided on the bottom wall 12a of the base 12 in the area overlapping with the side wall 12b, which is the corner of the bottom wall 12a. The first positioning pin PP1 protrudes substantially vertically from the bottom wall 12a. The first positioning hole PT1 is provided on the printed circuit board 40, located between one side edge of the printed circuit board 40 and the interface connector 44.

[0112] The second positioning hole PT2 of the second positioning part P2 is provided in the area overlapping with the side wall 12b, which is near the other corner of the bottom wall 12a. The second positioning hole PT2 is provided on the printed circuit board 40, located between the other side edge of the printed circuit board 40 and the interface connector 44. The second positioning pin PP2 protrudes substantially vertically from the printed circuit board 40.

[0113] like Figure 25As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0114] In the seventh embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0115] (Eighth Embodiment)

[0116] Figure 26 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the eighth embodiment. Figure 27 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 28 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the 8th embodiment.

[0117] As shown in the figure, in the eighth embodiment, the first positioning pin PP1 and the second positioning pin PP2 are both disposed on the substrate 12, and the first positioning hole PT1 and the second positioning hole PT2 are both disposed on the printed circuit board 40 side.

[0118] The first positioning pin PP1 of the first positioning part P1 is provided in the bottom wall 12a of the base 12 in the area overlapping with the side wall 12b, specifically at the corner of the bottom wall 12a. The first positioning pin PP1 protrudes substantially vertically from the bottom wall 12a. The first positioning hole PT1 is provided in the housing 44a of the interface connector 44 near one side edge of the printed circuit board 40.

[0119] The second positioning pin PP2 of the second positioning part P2 is disposed in the area overlapping with the side wall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a. The second positioning pin PP2 protrudes substantially vertically from the bottom surface 48a. The second positioning hole PT2 is disposed in the housing 44a of the interface connector 44.

[0120] like Figure 28 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0121] In the eighth embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0122] (9th embodiment)

[0123] Figure 29 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the 9th embodiment. Figure 30 This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 31 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the 9th embodiment.

[0124] As shown in the figure, in the 9th embodiment, the first positioning pin PP1 and the second positioning pin PP2 are both disposed on the substrate 12, and the first positioning hole PT1 and the second positioning hole PT2 are both disposed on the printed circuit board 40 side.

[0125] The first positioning pin PP1 of the first positioning part P1 is disposed in the bottom wall 12a of the substrate 12 in the area overlapping with the side wall 12b, specifically at the corner of the bottom wall 12a. The first positioning pin PP1 protrudes substantially vertically from the bottom wall 12a. The first positioning hole PT1 is disposed on the printed circuit board 40, located between one side edge of the printed circuit board 40 and the interface connector 44.

[0126] The second positioning pin PP2 of the second positioning part P2 is disposed in the area overlapping with the side wall 12b, which is the bottom surface 48a of the recess 48 formed in the bottom wall 12a. The second positioning pin PP2 protrudes substantially vertically from the bottom surface 48a. The second positioning hole PT2 is disposed in the housing 44a of the interface connector 44.

[0127] like Figure 31 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0128] In the ninth embodiment, the other components of the HDD are the same as those of the HDD involved in the first embodiment.

[0129] (10th Embodiment)

[0130] Figure 32 This is a disassembled perspective view showing the back side of the substrate and the control circuit board of the HDD according to the 10th embodiment. Figure 31This is a perspective view showing the interface connector mounting portion of the control circuit board. Figure 32 This is a cross-sectional view of the positioning portion of the substrate and control circuit board in the HDD according to the 10th embodiment.

[0131] As shown in the figure, in the 10th embodiment, the first positioning pin PP1 of the first positioning part P1 is provided on the bottom wall 12a of the base 12 in the area overlapping with the side wall 12b, specifically at the corner of the bottom wall 12a. The first positioning pin PP1 protrudes substantially vertically from the bottom wall 12a. The first positioning hole PT1 is provided on the printed circuit board 40, located between one side edge of the printed circuit board 40 and the interface connector 44.

[0132] The second positioning pin PP2 of the second positioning part P2 is disposed in the area overlapping with the side wall 12b, which is near the other corner of the bottom wall 12a. The first positioning pin PP1 protrudes substantially vertically from the bottom wall 12a. The second positioning hole PT2 is disposed on the printed circuit board 40, located between the other side edge of the printed circuit board 40 and the interface connector 44.

[0133] like Figure 34 As shown, the printed circuit board 40 is positioned relative to the substrate 12 at the first positioning part P1 and the second positioning part P2 by means of the first positioning pin PP1 of the first positioning part P1 engaging with the first positioning hole PT1 and the second positioning pin PP2 of the second positioning part P2 engaging with the second positioning hole PT2. The thickness of the housing in the area where the first positioning part P1 and the second positioning part P2 are provided is thicker than the thickness of at least a portion of the bottom wall 12a.

[0134] In the 10th embodiment, the other components of the HDD are the same as those of the HDD involved in the 1st embodiment.

[0135] In any of the above-described embodiments 2 to 10, the same effects as those in the first embodiment can be obtained. That is, in any of the second to tenth embodiments, a disc device is obtained that can maintain the airtightness of the housing and improve assembly accuracy.

[0136] Several embodiments of the present invention have been described, but these embodiments are provided by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, and are included in the scope of the invention as set forth in the claims and their equivalents.

[0137] For example, the positioning part is not limited to the first and second positioning parts; more than three parts can be provided as needed. The shape and size of the positioning pin and positioning hole are not limited to the embodiment shown in the figure; other shapes and sizes can be appropriately selected.

Claims

1. A disk device comprising: The box has: a base having a bottom wall and frame-shaped side walls erected on the periphery of the bottom wall, a cover fixed to the side walls, and at least two base-side positioning parts disposed on the bottom wall in the area overlapping with the side walls, the box being sealed with a gas with a density lower than air. Multiple disks are housed within the enclosure; A motor supports the disk and rotates the disk; Multiple heads process data on the disk; as well as A printed circuit board, mounted on the outer surface of the bottom wall and controlling the movement of the motor and the head, is equipped with multiple connectors and electronic components, and has at least two substrate-side positioning portions that respectively engage with the base-side positioning portions. One of the substrate-side positioning portion and the base plate-side positioning portion includes a pin extending substantially perpendicularly relative to the bottom wall, and the other includes a hole for the pin to engage.

2. The disk device according to claim 1, The two base-side positioning portions each have a pin protruding from the bottom wall, and the two substrate-side positioning portions each have a hole for the pin to engage.

3. The disk device according to claim 1, The two substrate-side positioning portions each have pins protruding from the printed circuit board, and the two substrate-side positioning portions each have holes for the pins to engage.

4. The disk device according to claim 1, One of the two base-side positioning portions has a pin protruding from the bottom wall, and the other has a hole formed in the bottom wall. One of the two substrate-side positioning portions has a hole for the pin to engage, and the other has a pin that protrudes from the printed circuit board and engages with the hole.

5. The disk device according to claim 1, The printed circuit board includes an interface connector, which has a housing fixed to the board and multiple terminals disposed within the housing. At least one of the substrate-side positioning portions includes a pin protruding from the housing.

6. The disk device according to claim 1, The printed circuit board includes an interface connector, which has a housing fixed to the board and multiple terminals disposed within the housing. At least one of the substrate-side positioning portions includes a hole disposed in the housing.

7. A disk device comprising: The housing has a base having: a first part having a first thickness, a second part having a second thickness that is thicker than the first thickness, and a pin or hole provided in the second part as a positioning part, the housing being sealed with a gas having a density lower than that of air. Multiple disks are housed within the enclosure; as well as A printed circuit board having a hole or pin that engages with the pin or the hole, is mounted on the outer surface of the substrate. The first part is disposed in a region that overlaps with the internal space of the box in the thickness direction, and the second part is disposed in a region that does not overlap with the internal space of the box in the thickness direction.

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