Disk device

Abstract

An embodiment provides a disk device capable of suppressing loss of airtightness at a welding portion. A disk device of one embodiment includes a disk-shaped recording medium, a magnetic head, a housing, and a first protective member made of resin. The recording medium includes a recording layer. The magnetic head is configured to read and write information to the recording medium. The housing includes: a base having an inner chamber for accommodating the recording medium and the magnetic head; a cover covering the inner chamber; and a welding portion to which the base and the cover are welded. The first protective member is located outside the housing and covers at least a portion of the welding portion.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2020-155156 (filing date: September 16, 2020), and the present application incorporates the entire contents of the basic application by reference. Technical Field

[0002] An embodiment of the present invention relates to a disk device. Background Art

[0003] A disk device such as a hard disk drive (HDD) includes a magnetic disk and a magnetic head for reading and writing information from and to the magnetic disk. The magnetic disk, the magnetic head, and various components are housed in a casing.

[0004] The housing includes, for example, a base and a top cover welded to the base. The top cover is welded to the base to hermetically seal the interior of the housing. A low-density gas such as helium is sealed inside the housing to reduce the rotational resistance of the magnetic disk and the magnetic head.

[0005] The welded portion is more fragile than other parts of the housing. Therefore, if the welded portion collides with another object, the airtightness of the housing may be impaired at the welded portion. Summary of the invention

[0006] An embodiment of the present invention provides a disk device capable of suppressing loss of airtightness at a welded portion.

[0007] A disk device according to one embodiment includes a disk-shaped recording medium, a magnetic head, a housing, and a first protective member made of resin. The recording medium has a recording layer. The magnetic head is configured to read and write information to the recording medium. The housing includes: a base having an inner chamber for accommodating the recording medium and the magnetic head; a cover covering the inner chamber; and a welding portion to which the base and the cover are welded. The first protective member is located outside the housing and covers at least a portion of the welding portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is an exemplary perspective view showing a hard disk drive (HDD) according to the first embodiment.

[0009] Figure 2 This is an exemplary perspective view showing an exploded view of the HDD according to the first embodiment.

[0010] Figure 3 This is an exemplary cross-sectional view showing a part of the HDD according to the first embodiment.

[0011] Figure 4 This is an exemplary cross-sectional view showing a part of the HDD according to the second embodiment.

[0012] Figure 5This is an exemplary cross-sectional view showing a part of the HDD according to the third embodiment.

[0013] Figure 6 This is an illustrative cross-sectional view showing a portion of an HDD according to a modification of the embodiment. DETAILED DESCRIPTION

[0014] (First embodiment)

[0015] Hereinafter, regarding the first embodiment, refer to Figures 1 to 3 In addition, in this specification, the constituent elements of the implementation mode and the description of the element are sometimes recorded in multiple expressions. The constituent elements and their descriptions are examples and are not limited to the descriptions in this specification. The constituent elements can also be identified by names different from the names in this specification. In addition, the constituent elements can also be described using expressions different from the descriptions in this specification.

[0016] Figure 1 This is an exemplary perspective view showing a hard disk drive (HDD) 10 according to the first embodiment. The HDD 10 is an example of a disk device, and may also be called an electronic device, a storage device, an external storage device, or a magnetic disk device.

[0017] As shown in the drawings, in this specification, for convenience, an X-axis, a Y-axis, and a Z-axis are defined. The X-axis, the Y-axis, and the Z-axis are orthogonal to each other. The X-axis is set along the width of the HDD 10. The Y-axis is set along the length of the HDD 10. The Z-axis is set along the thickness of the HDD 10.

[0018] In addition, in this specification, the X direction, the Y direction, and the Z direction are defined. The X direction is a direction along the X axis, including the +X direction indicated by the arrow of the X axis and the -X direction which is the opposite direction of the arrow of the X axis. The Y direction is a direction along the Y axis, including the +Y direction indicated by the arrow of the Y axis and the -Y direction which is the opposite direction of the arrow of the Y axis. The Z direction is a direction along the Z axis, including the +Z direction indicated by the arrow of the Z axis and the -Z direction which is the opposite direction of the arrow of the Z axis.

[0019] Figure 2 This is an exemplary perspective view showing the HDD 10 according to the first embodiment in an exploded manner. Figure 3 1 is an exemplary cross-sectional view showing a portion of the HDD 10 according to the first embodiment. Figure 2 As shown, the HDD 10 has a housing 11, a plurality of magnetic disks 12, a spindle motor 13, a plurality of magnetic heads 14, an actuator assembly 15, a voice coil motor (VCM) 16, a ramp loading mechanism 17, and a flexible printed wiring board (FPC) 18. Figure 3 As shown, the HDD 10 has a printed circuit board (PCB) 19. The magnetic disk 12 is an example of a recording medium.

[0020] like Figure 2 As shown, the housing 11 is formed in a rectangular box shape extending in the Y direction. The housing 11 has a base 21, an inner cover 22, and an outer cover 23. The base 21 is an example of a storage member. The outer cover 23 is an example of a lid. In addition, the housing 11 is not limited to this example, and may also have other components.

[0021] The base 21 is a container with a bottom, and has a bottom wall 25 and a peripheral wall 26. The bottom wall 25 is formed in a substantially rectangular (quadrilateral) plate shape extending on the XY plane. The peripheral wall 26 protrudes from the edge of the bottom wall 25 in a substantially +Z direction, and is formed in a substantially rectangular frame shape. In other words, the peripheral wall 26 protrudes from the bottom wall 25 in a direction substantially orthogonal to the bottom wall 25. The bottom wall 25 and the peripheral wall 26 are made of a metal material such as an aluminum alloy, for example, and are formed integrally.

[0022] like Figure 3 As shown, the bottom wall 25 has an outer bottom surface 25a and an inner bottom surface 25b. The outer bottom surface 25a faces the outside of the housing 11. The inner bottom surface 25b is located on the opposite side of the outer bottom surface 25a and faces the inside of the housing 11. For example, the outer bottom surface 25a faces the -Z direction, and the inner bottom surface 25b faces the +Z direction. In addition, the outer bottom surface 25a and the inner bottom surface 25b can also face other directions.

[0023] The peripheral wall 26 has a first inner surface 26a, a second inner surface 26b, a support surface 26c, an outer surface 26d, and an end surface 26e. The first inner surface 26a and the second inner surface 26b are examples of inner surfaces. The peripheral wall 26 is not limited to this example.

[0024] The first inner surface 26a and the second inner surface 26b face the inside of the housing 11. The second inner surface 26b is farther from the bottom wall 25 than the first inner surface 26a. The support surface 26c is provided between the first inner surface 26a and the second inner surface 26b and faces substantially in the +Z direction.

[0025] The outer surface 26d is located on the opposite side of the first inner surface 26a and the second inner surface 26b and faces the outside of the housing 11. The end surface 26e is provided at the end of the peripheral wall 26 in the +Z direction. The end surface 26e faces substantially in the +Z direction. In addition, the end surface 26e is not limited to this example.

[0026] The base 21 is provided with an inner chamber 27 opened in the +Z direction. The inner chamber 27 is formed (defined) by, for example, the inner bottom surface 25b of the bottom wall 25, the first inner surface 26a, the second inner surface 26b, and the support surface 26c of the peripheral wall 26. Therefore, the peripheral wall 26 surrounds the inner chamber 27, and the inner bottom surface 25b of the bottom wall 25 and the first inner surface 26a, the second inner surface 26b, and the support surface 26c of the peripheral wall 26 face the inner chamber 27.

[0027] The inner cover 22 and the outer cover 23 are made of a metal material such as aluminum alloy, for example. In other words, the inner cover 22 and the outer cover 23 are made of the same material as the base 21. In addition, the base 21, the inner cover 22 and the outer cover 23 may be made of different materials.

[0028] The inner cover 22 is formed in a substantially rectangular (quadrilateral) plate shape extending on the XY plane. The inner cover 22 is separated from the bottom wall 25 in the +Z direction. The inner cover 22 is supported on the support surface 26c of the peripheral wall 26 via, for example, a buffer member 28. The buffer member 28 is made of, for example, synthetic rubber, gel or sponge. The inner cover 22 is mounted on the base 21 by, for example, a screw member. The inner cover 22 is located in the inner chamber 27.

[0029] The outer cover 23 is formed in a substantially rectangular (quadrilateral) plate shape extending in the XY plane. The outer cover 23 is separated from the inner cover 22 in the +Z direction. The outer cover 23 is supported by the end surface 26e of the peripheral wall 26 and covers the inner chamber 27 opened in the +Z direction. Thus, the outer cover 23 covers the inner cover 22.

[0030] The outer cover 23 has a first surface 23a, a second surface 23b, and an outer edge 23c. The first surface 23a faces the inner chamber 27 inside the housing 11. A portion of the first surface 23a is supported by the end surface 26e of the peripheral wall 26. The second surface 23b is located on the opposite side of the first surface 23a and faces the outside of the housing 11. For example, the first surface 23a faces the -Z direction, and the second surface 23b faces the +Z direction. In addition, the first surface 23a and the second surface 23b may also face other directions.

[0031] The outer edge 23c is provided between the first surface 23a and the second surface 23b. The outer edge 23c is, for example, located on the end surface 26e of the peripheral wall 26, or forms a substantially flush plane with the outer surface 26d. In addition, the outer edge 23c can be welded to the base 21 as described below to be integrated with the base 21.

[0032] The outer cover 23 is airtightly fixed to the end face 26e of the peripheral wall 26 by welding such as laser welding. Therefore, the housing 11 further includes a welding portion 29. The welding portion 29 is a portion of the housing 11 where the end face 26e of the peripheral wall 26 of the base 21 and the outer cover 23 are welded. At the welding portion 29, the base 21 and the outer cover 23 are integrated.

[0033] The entire periphery of the outer edge 23c of the outer cover 23 and the end surface 26e of the peripheral wall 26 are welded to each other at the welded portion 29. The welded portion 29 is provided on a portion of the second surface 23b of the outer cover 23, the entire periphery of the outer edge 23c, and a portion of the outer surface 26d of the peripheral wall 26, and is exposed to the outside of the housing 11.

[0034] The outer cover 23 is welded to the base 21, and the outer cover 23 hermetically seals the inner chamber 27. In addition, the outer cover 23 does not have to completely hermetically seal the inner chamber 27. The inner chamber 27 accommodates the magnetic disk 12, the spindle motor 13, the magnetic head 14, the actuator assembly 15, the VCM 16, the ramp loading mechanism 17, and the FPC 18.

[0035] The inner chamber 27 is filled with a gas different from air. For example, a low-density gas having a lower density than air, an inert gas having a low reactivity, etc. are filled in the inner chamber 27. In the present embodiment, helium is filled in the inner chamber 27. In addition, other fluids may be filled in the inner chamber 27. In addition, the inner chamber 27 may be maintained at a vacuum, a low pressure close to a vacuum, or a negative pressure lower than the atmospheric pressure.

[0036] Helium is filled into the inner chamber 27 through, for example, vents provided in the inner cover 22 and the outer cover 23. Various components are mounted on the base 21, and after the inner cover 22 and the outer cover 23 are mounted on the base 21, the air in the inner chamber 27 is extracted from the vents, and the helium is filled into the inner chamber 27 through the vents. The vents are hermetically sealed, for example, by a sealant.

[0037] Figure 2 The magnetic disk 12 is, for example, a disk having magnetic recording layers provided on the upper surface and the lower surface. The diameter of the magnetic disk 12 is, for example, 3.5 inches, but is not limited to this example.

[0038] The spindle motor 13 supports and rotates the plurality of magnetic disks 12 stacked at intervals. The plurality of magnetic disks 12 are held by a hub of the spindle motor 13 by, for example, a clamp spring.

[0039] The magnetic head 14 records and reproduces information on the recording layer of the magnetic disk 12. In other words, the magnetic head 14 reads and writes information on the magnetic disk 12. The magnetic head 14 is mounted on the actuator assembly 15.

[0040] The actuator assembly 15 is rotatably supported on a support shaft 31 disposed at a position away from the magnetic disk 12. The VCM 16 rotates the actuator assembly 15 and is disposed at a desired position. When the magnetic head 14 is moved to the outermost periphery of the magnetic disk 12 by the rotation of the actuator assembly 15 realized based on the VCM 16, the ramp loading mechanism 17 keeps the magnetic head 14 at an unloading position away from the magnetic disk 12.

[0041] The actuator assembly 15 has an actuator block 35, a plurality of arms 36, and a plurality of head suspension assemblies 37. The head suspension assemblies 37 may also be referred to as head gimbal assemblies (HGAs).

[0042] The actuator block 35 is rotatably supported on the support shaft 31 via a bearing, for example. A plurality of arms 36 protrude from the actuator block 35 in a direction substantially orthogonal to the support shaft 31. Alternatively, the actuator assembly 15 may be divided so that the arms 36 protrude from each of the plurality of actuator blocks 35.

[0043] The plurality of arms 36 are arranged at intervals in the direction in which the support shaft 31 extends. The arms 36 are formed in a plate shape that can enter between adjacent magnetic disks 12. The plurality of arms 36 extend substantially in parallel.

[0044] The actuator block 35 and the plurality of arms 36 are integrally formed of, for example, aluminum. In addition, the materials of the actuator block 35 and the arms 36 are not limited to this example.

[0045] The voice coil of the VCM 16 is provided on a protrusion protruding from the actuator block 35 to the opposite side of the arm 36. The VCM 16 includes a pair of yokes, a voice coil disposed between the yokes, and a magnet provided on the yokes.

[0046] As described above, the VCM 16 rotates the actuator assembly 15. In other words, the VCM 16 rotates (moves) the actuator block 35, the arm 36, and the head gimbal assembly 37 in an integrated manner.

[0047] The head gimbal assembly 37 is attached to the front end portion of the corresponding arm 36 and protrudes from the arm 36. Thus, a plurality of head gimbal assemblies 37 are arranged at intervals in the direction in which the support shaft 31 extends.

[0048] A displaceable gimbal portion (elastic support portion) is provided at the front end of the head gimbal assembly 37. The magnetic head 14 is mounted on the gimbal portion of the head gimbal assembly 37. The magnetic head 14 is electrically connected to the FPC 18 via a flexure provided in the head gimbal assembly 37.

[0049] Figure 3 The PCB 19 shown is, for example, a rigid substrate such as a glass epoxy substrate, a multi-layer substrate or a laminated substrate, etc. The PCB 19 is disposed outside the housing 11 and mounted on the outer bottom surface 25a of the bottom wall 25 of the base 21. The PCB 19 is mounted on the bottom wall 25, for example, by a plurality of screws.

[0050] The PCB 19 is electrically connected to the FPC 18 disposed in the inner chamber 27 via a connector provided on the bottom wall 25. In addition, the bottom wall 25 hermetically closes the inner chamber 27 at a portion where the connector is provided.

[0051] An interface (I / F) connector 39 is mounted on the PCB 19. The I / F connector 39 is an example of a connector. The I / F connector 39 is a connector that complies with an interface standard such as Serial ATA, and is connected to an I / F connector of a host computer.

[0052] The I / F connector 39 can be connected to a host computer directly or indirectly via a cable, for example. The host computer is an example of an external device. The HDD 10 receives power supply from the host computer through the I / F connector 39 and transmits and receives various data to and from the host computer.

[0053] The I / F connector 39 is provided at the first end 11a of the housing 11. The first end 11a is an end of the housing 11 in the +Y direction. For example, the I / F connector 39 is arranged in a notch provided in the base 21 at the first end 11a.

[0054] Various electronic components such as a controller are mounted on the PCB 19. The controller is electrically connected to, for example, the spindle motor 13, the magnetic head 14, and the VCM 16, and performs overall control of the HDD 10.

[0055] like Figure 2 As shown, the HDD 10 further includes a first protective member 41 and two second protective members 42. The first protective member 41 is an example of a first protective member and a protective member. In addition, the HDD 10 may include one second protective member 42 or three or more second protective members 42, or may omit the second protective member 42.

[0056] The first protective member 41 has a covering wall 50. The covering wall 50 of the present embodiment is a molded (molded) part made of resin. The covering wall 50 is made of an elastic body such as synthetic rubber, for example. In addition, the resin is not limited to synthetic rubber, and includes synthetic resins such as plastics and natural resins such as natural rubber. In addition, the covering wall 50 may also be sponge-like.

[0057] The covering wall 50 is softer than the housing 11 made of an aluminum alloy. For example, the Young's modulus of the covering wall 50 is lower than the Young's modulus of each of the base 21, the cover 23, and the weld 29 of the housing 11. In addition, the covering wall 50 may have other physical properties related to softness, such as Vickers hardness, lower than those of each of the base 21, the cover 23, and the weld 29.

[0058] like Figure 3 As shown, the covering wall 50 is located outside the housing 11 and covers the entire area of ​​the welding portion 29. In addition, the covering wall 50 may also partially expose the welding portion 29. That is, the covering wall 50 covers at least a portion of the welding portion 29.

[0059] The covering wall 50 is in close contact with the welding portion 29. In other words, the covering wall 50 is in contact with (in contact with) substantially the entire area of ​​the surface of the welding portion 29 exposed to the outside of the housing 11. In addition, a gap may be generated between the covering wall 50 and the welding portion 29. In addition, the covering wall 50 may cover the welding portion 29 at a position away from the welding portion 29.

[0060] The cover wall 50 includes an upper wall 51 and a side wall 52. The upper wall 51 is formed integrally with the side wall 52. The cover wall 50 may include the upper wall 51 and the side wall 52 that are separable from each other, or one of the upper wall 51 and the side wall 52 may be omitted.

[0061] The upper wall 51 is formed, for example, in a substantially rectangular frame shape corresponding to the outer edge 23c of the outer cover 23. The upper wall 51 covers a portion of the second surface 23b of the outer cover 23 and the welded portion 29 provided on the second surface 23b. The upper wall 51 is in close contact with a portion of the second surface 23b of the outer cover 23 covered by the upper wall 51 and the welded portion 29 provided on the second surface 23b. In addition, the upper wall 51 may be formed in a plate shape so as to cover the entire area of ​​the second surface 23b of the outer cover 23.

[0062] The upper wall 51 has an inner edge 51a and an outer edge 51b. The inner edge 51a is an inner edge of the frame-shaped upper wall 51. The outer edge 51b is an outer edge of the frame-shaped upper wall 51. When the upper wall 51 covers the entire area of ​​the second surface 23b, the inner edge 51a is omitted.

[0063] The side wall 52 protrudes from the outer edge 51b of the upper wall 51. The side wall 52 is formed, for example, in a substantially rectangular frame shape corresponding to the outer surface 26d of the peripheral wall 26 of the base 21. The side wall 52 covers the entire circumference of the outer edge 23c of the outer cover 23, a portion of the outer surface 26d of the peripheral wall 26, and the welded portion 29 provided on the outer edge 23c and the outer surface 26d. The side wall 52 is in close contact with the entire circumference of the outer edge 23c of the outer cover 23 covered by the side wall 52, a portion of the outer surface 26d of the peripheral wall 26, and the welded portion 29 provided on the outer edge 23c and the outer surface 26d.

[0064] The welded portion 29 is difficult to be smooth compared to a portion formed by casting, forging or cutting in the housing 11. That is, the welded portion 29 may have irregularities. However, the cover wall 50 is made of synthetic rubber and can be elastically deformed along the irregularities, thereby being closely attached to the welded portion 29 having irregularities. In addition, the welded portion 29 may also be smooth.

[0065] In the present embodiment, the outer surface 26d of the peripheral wall 26 has a first outer surface 61, a second outer surface 62, and a connecting surface 63. The second outer surface 62 is an example of an inclined surface. The first outer surface 61, for example, faces a direction substantially orthogonal to the Z axis. In addition, the first outer surface 61 may also face other directions. The second outer surface 62 is closer to the inner chamber 27 than the first outer surface 61, and is closer to the end surface 26e than the first outer surface 61. The connecting surface 63 connects the first outer surface 61 and the second outer surface 62, and faces substantially the +Z direction.

[0066] The second outer surface 62 is connected to the end surface 26e. Therefore, the welding portion 29 is provided at a portion of the second outer surface 62 in the outer surface 26d. In addition, the second outer surface 62 is not limited to this example. The second outer surface 62 is inclined so as to be closer to the inner chamber 27 as it is farther away from the end surface 26e. Therefore, the second outer surface 62 and the connecting surface 63 form a groove 65 that is recessed from the first outer surface 61 toward the inside of the housing 11. In addition, the second outer surface 62 may also be provided substantially parallel to the first outer surface 61.

[0067] The second outer surface 62, the connecting surface 63, and the groove 65 are formed by cutting using a milling cutter, for example. For example, a portion of the peripheral wall 26 is cut by an obliquely inclined end mill to form the inclined second outer surface 62 on the peripheral wall 26. In addition, the manufacturing method of the second outer surface 62 is not limited to this example.

[0068] The cutting process of the peripheral wall 26 is usually performed during the manufacture of the HDD 10. Therefore, the second outer surface 62, the connecting surface 63, and the groove 65 can be formed without adding a special manufacturing process.

[0069] The side wall 52 of the first protection member 41 covers a portion of the second outer surface 62 and contacts a portion of the second outer surface 62. The side wall 52 is in close contact with the second outer surface 62 covered by the side wall 52. Thus, a portion of the side wall 52 is accommodated in the groove 65.

[0070] The side wall 52 protrudes from the upper wall 51 along the second outer surface 62. Therefore, the side wall 52 is inclined so as to get closer to the inner chamber 27 as it moves away from the upper wall 51. In other words, the frame-shaped side wall 52 extends from the upper wall 51 so as to become narrower.

[0071] A portion 11c of the housing 11 including the welded portion 29 is located between the upper wall 51 and the side wall 52 in the Z direction. Therefore, the upper wall 51 restricts the movement of the outer cover 23 in the -Z direction relative to the housing 11 by abutting against the second surface 23b of the outer cover 23. In addition, the side wall 52 restricts the movement of the outer cover 23 in the +Z direction relative to the housing 11 by abutting against the second outer surface 62 of the peripheral wall 26. In other words, the side wall 52 restricts the movement of the outer cover 23 in the +Z direction relative to the housing 11 by being hooked on the second outer surface 62.

[0072] The first protective member 41 is mounted on the housing 11, for example, as follows. The method of mounting the first protective member 41 on the housing 11 is not limited to the following method. First, the frame-shaped side wall 52 extending from the upper wall 51 in a tapered manner is expanded. The side wall 52 is made of a material with a low Young's modulus such as synthetic rubber, so that it can be easily elastically expanded.

[0073] Then, the housing 11 is accommodated inside the expanded side wall 52. Then, the expansion of the side wall 52 is released, and the side wall 52 is restored to contact the second outer surface 62 of the peripheral wall 26 of the housing 11. The shape of the side wall 52 corresponds to the second outer surface 62, or is set to be slightly smaller than the second outer surface 62. Therefore, the side wall 52 presses the second outer surface 62 by elastic force.

[0074] like Figure 3 As shown, the housing 11 has second outer surfaces 62a and 62b. The second outer surface 62a is, for example, a portion of the second outer surface 62 disposed at the end of the housing 11 in the +Y direction. The second outer surface 62b is a portion of the second outer surface 62 disposed at the end of the housing 11 in the -Y direction. The second outer surface 62a is an example of the first side surface. The second outer surface 62b is an example of the second side surface and is located on the opposite side of the second outer surface 62a.

[0075] The covering wall 50 has side walls 52a and 52b. The side wall 52a is an example of a first side wall. The side wall 52b is an example of a second side wall. The side wall 52a covers a portion of the second outer surface 62a and contacts a portion of the second outer surface 62a. The side wall 52b covers a portion of the second outer surface 62b and contacts a portion of the second outer surface 62b.

[0076] As described above, when the side wall 52 is expanded, the housing 11 is accommodated inside the side wall 52. Thus, the distance between the side wall 52a and the side wall 52b is elastically expanded by the housing 11. In addition, the inner periphery of the side wall 52 is also elastically expanded by the housing 11.

[0077] The side wall 52a presses the second outer surface 62a. In addition, the side wall 52b presses the second outer surface 62b. That is, the side wall 52 presses the second outer surfaces 62a and 62b by elastic force. In other words, the housing 11 is clamped between the side wall 52a and the side wall 52b. Thus, the first protective member 41 is held in the housing 11 by pressing the second outer surfaces 62a and 62b by elastic force.

[0078] Similarly, the side wall 52 uses elastic force to press: a portion of the second outer surface 62 of the end of the housing 11 provided in the +X direction and a portion of the second outer surface 62 of the end of the housing 11 provided in the -X direction. Based on the above, the first protective member 41 is detachably mounted on the housing 11. When the first protective member 41 is removed from the housing 11, the distance between the side wall 52a and the side wall 52b is shortened.

[0079] The second protection member 42 is made of a metal such as an aluminum alloy. The second protection member 42 made of metal has a higher Young's modulus than the first protection member 41. The second protection member 42 is located outside the housing 11 and covers at least a portion of the welded portion 29 and the first protection member 41 covering the welded portion 29.

[0080] The housing 11 has a second end 11b. The second end 11b is an end of the housing 11 in the -Y direction and is located on the opposite side of the first end 11a. The second protective member 42 on one side covers the portion of the welded portion 29 provided at the first end 11a of the housing 11. The second protective member 42 on the other side covers the portion of the welded portion 29 provided at the second end 11b of the housing 11.

[0081] The first protective member 41 covering the welded portion 29 is located between the second protective member 42 and the welded portion 29. Therefore, the second protective member 42 covers at least a portion of the first protective member 41 and covers the welded portion 29 from above the first protective member 41.

[0082] The two second protection members 42 each include a first wall 71 and a second wall 72. The first wall 71 and the second wall 72 are formed integrally. The second protection member 42 may include the first wall 71 and the second wall 72 that are separable from each other, or one of the first wall 71 and the second wall 72 may be omitted.

[0083] like Figure 2 As shown, the first wall 71 is formed, for example, in a substantially rectangular plate shape extending substantially in the X direction along the outer edge 23c of the cover 23 at the first end 11a or the second end 11b. The first wall 71 covers a portion of the second surface 23b of the cover 23, the welded portion 29 provided on the second surface 23b, and the first protective member 41 covering the second surface 23b and the welded portion 29. The first wall 71 may be in contact with the first protective member 41 or may be separated from the first protective member 41.

[0084] The first wall 71 is fixed to the second surface 23 b by, for example, an adhesive portion 75 . The adhesive portion 75 is, for example, an adhesive or a double-sided tape. The adhesive or the double-sided tape is made of, for example, a synthetic resin. The adhesive portion 75 may also fix the first wall 71 to the first protective member 41 .

[0085] The first wall 71 has an edge 71a. The edge 71a is an end of the first wall 71 in the Y direction, and is located outside the housing 11 compared to the outer edge 23c of the cover 23. For example, the edge 71a of the second protection member 42 attached to the first end 11a of the housing 11 is away from the outer edge 23c in the +Y direction. In addition, the edge 71a of the second protection member 42 attached to the second end 11b of the housing 11 is away from the outer edge 23c in the -Y direction.

[0086] The second wall 72 protrudes from the end edge 71a of the first wall 71. The second wall 72 covers: a portion of the outer edge 23c of the outer cover 23, a portion of the outer surface 26d of the peripheral wall 26, the welded portion 29 provided on the outer edge 23c and the outer surface 26d, and the first protective member 41 covering the outer surface 26d and the welded portion 29.

[0087] The second wall 72 is separated from the welding portion 29 and the first protection member 41, and is in contact with the outer surface 26d. In the present embodiment, the second wall 72 extends obliquely so as to approach the housing 11 as it separates from the first wall 71, and abuts against the first outer surface 61. In addition, the second wall 72 may be in contact with the welding portion 29 or separated from the outer surface 26d.

[0088] The above HDD 10 is inserted and removed from the rack of the host computer, for example, in the Y direction. The Y direction may also be referred to as the insertion and removal direction. For example, when the HDD 10 is inserted and removed from the rack or when the HDD 10 is handled by an operator due to transportation, the housing 11 may collide with other objects such as the rack.

[0089] The first protective member 41 covers the welded portion 29. In addition, the second protective member 42 covers the welded portion 29 from above the first protective member 41. Therefore, other objects do not directly collide with the welded portion 29 but collide with the first protective member 41 or the second protective member 42.

[0090] The second protection member 42 is separated from the first protection member 41 and the welded portion 29, so that when another object collides with the first protection member 41, a strong external force is suppressed from being transmitted to the first protection member 41 and the welded portion 29. In addition, when another object collides with the first protection member 41, the first protection member 41 having a low Young's modulus absorbs the impact by elastic deformation, thereby suppressing the strong external force from being transmitted to the welded portion 29.

[0091] When the welding portion 29 is damaged, for example, helium in the inner chamber 27 is released to the outside of the housing 11 through a hole formed in the welding portion 29, and external gas may invade the inner chamber 27. In this case, a gas having a higher density than helium, such as nitrogen, oxygen, and carbon dioxide, may increase the rotation resistance of the magnetic disk 12 and the magnetic head 14 and reduce the positioning accuracy of the magnetic head 14. However, in the HDD 10 of the present embodiment, since the first protective member 41 and the second protective member 42 protect the welding portion 29, the airtightness of the inner chamber 27 is prevented from being damaged at the welding portion 29.

[0092] In the HDD 10 of the first embodiment described above, the first protective member 41 made of resin covers at least a part of the welding portion 29. Thus, for example, even if the HDD 10 collides with another object, the first protective member 41 absorbs the impact and suppresses the impact from being transmitted to the welding portion 29. In addition, the welding portion 29 is prone to shape deviation compared to, for example, a portion formed by casting or cutting, and it is difficult to determine the relative position with the first protective member 41. However, since the first protective member 41 is made of resin, it is usually softer than the welding portion 29, and even when it interferes with the welding portion 29, it is possible to suppress the application of a strong external force to the welding portion 29. Thus, the HDD 10 of this embodiment can suppress the airtightness of the inner chamber 27 from being damaged at the welding portion 29. For example, the HDD 10 of this embodiment suppresses the reduction in the positioning performance of the magnetic head 14 relative to the magnetic disk 12 due to the increase in the rotational resistance of the magnetic disk 12 and the magnetic head 14 caused by the external air intruding into the inner chamber 27.

[0093] According to another description, the first protective member 41 having a lower Young's modulus than the welded portion 29 covers at least a portion of the welded portion 29. Thus, for example, even if the HDD 10 collides with another object, the first protective member 41 absorbs the impact and suppresses the impact from being transmitted to the welded portion 29. In addition, since the first protective member 41 has a lower Young's modulus than the welded portion 29, for example, even when interfering with the welded portion 29, it is possible to suppress a strong external force from being applied to the welded portion 29. Thus, the HDD 10 of this embodiment can suppress the airtightness of the inner chamber 27 from being damaged at the welded portion 29.

[0094] The first protection member 41 is in close contact with the welded portion 29. This increases the frictional force between the first protection member 41 and the housing 11. Therefore, the first protection member 41 can be prevented from being detached from the housing 11 at will.

[0095] The first protective member 41 covers the entire region of the welded portion 29. Thus, the first protective member 41 can suppress direct collision of the welded portion 29 with other members.

[0096] The housing 11 has a second outer surface 62a and a second outer surface 62b located on the opposite side of the second outer surface 62a. The first protective member 41 has a side wall 52a abutting against the second outer surface 62a and a side wall 52b abutting against the second outer surface 62b, and is installed on the housing 11 in a removable manner. The distance between the side wall 52a and the side wall 52b is elastically expanded by the housing 11. Thus, the first protective member 41 is easily installed on the housing 11. In addition, the first protective member 41 can be installed on the housing 11 without bonding, and can be easily removed from the housing 11.

[0097] The peripheral wall 26 has a first inner surface 26a and a second inner surface 26b facing the inner chamber 27, an outer surface 26d located on the opposite side of the first inner surface 26a and the second inner surface 26b and facing the outside of the housing 11, and an end surface 26e supporting the outer cover 23. The end surface 26e and the outer cover 23 are welded at the welding portion 29. The outer surface 26d has a second outer surface 62 inclined so as to approach the inner chamber 27 as it moves away from the end surface 26e. The first protective member 41 covers at least a portion of the outer cover 23 and at least a portion of the outer surface 26d, and contacts the second outer surface 62. That is, a portion 11c of the housing 11 is located between an upper wall 51 of the first protective member 41 covering the outer cover 23 and a side wall 52 of the first protective member 41 contacting the second outer surface 62 in the Z direction to which the end surface 26e faces. Thus, the side wall 52 of the first protective member 41 in contact with the second outer surface 62 restricts the housing 11 from moving away from the first protective member 41 in the Z direction, thereby preventing the first protective member 41 from being detached from the housing 11 at will.

[0098] The second protective member 42 made of metal is located outside the housing 11. The second protective member 42 covers at least one of the first end 11a provided in the housing 11 and the second end 11b located on the opposite side of the first end 11a in the welded portion 29. In addition, the second protective member 42 covers at least a portion of the first protective member 41. Thus, for example, even if the HDD 10 collides with another object, the second protective member 42 suppresses the impact from being transmitted to the welded portion 29 and the first protective member 41. In addition, the second protective member 42 made of metal suppresses the degradation of the first protective member 41 made of resin by covering the first protective member 41.

[0099] (Second embodiment)

[0100] Hereinafter, regarding the second embodiment, refer to Figure 4 In addition, in the following description of multiple embodiments, components having the same functions as components already described are sometimes marked with the same reference numerals as the components already described, and the description is omitted. In addition, multiple components marked with the same reference numerals do not necessarily have all the same functions and properties, and may also have different functions and properties corresponding to each embodiment.

[0101] Figure 4 2 is an exemplary cross-sectional view showing a portion of the HDD 10 according to the second embodiment. Figure 4 As shown, the outer surface 26d of the second embodiment has a second outer surface 82 and a concave surface 83 instead of the second outer surface 62 and the connecting surface 63. The first outer surface 61 and the second outer surface 82 are examples of outer surfaces. As in the first embodiment, the first outer surface 61 is oriented, for example, in a direction substantially orthogonal to the Z axis.

[0102] The second outer surface 82 is closer to the inner chamber 27 than the first outer surface 61, and closer to the end surface 26e than the first outer surface 61. The second outer surface 82 is, for example, oriented in a direction substantially orthogonal to the Z axis. In other words, the second outer surface 82 is provided substantially parallel to the first outer surface 61. The second outer surface 82 is connected to the end surface 26e. Therefore, the welding portion 29 is provided on a portion of the second outer surface 82 in the outer surface 26d. In addition, the second outer surface 82 is not limited to this example.

[0103] The concave surface 83 is located between the first outer surface 61 and the second outer surface 82, and is separated from the end surface 26e of the peripheral wall 26. The concave surface 83 is recessed from the first outer surface 61 and the second outer surface 82 toward the inside of the housing 11. Therefore, the concave surface 83 forms a groove 85 recessed from the first outer surface 61 and the second outer surface 82 toward the inside of the housing 11.

[0104] The concave surface 83 includes, for example, a first portion 83a, a second portion 83b, and a third portion 83c. The first portion 83a, for example, faces a direction substantially orthogonal to the Z axis. In other words, the first portion 83a is provided substantially parallel to the first outer surface 61 and the second outer surface 82. The second portion 83b connects the first portion 83a to the first outer surface 61 and faces substantially in the +Z direction. The third portion 83c connects the first portion 83a to the second outer surface 82 and faces substantially in the -Z direction. The third portion 83c is closer to the end surface 26e than the first portion 83a and the second portion 83b. In addition, the concave surface 83 is not limited to this example.

[0105] The second outer surface 82, the concave surface 83, and the groove 85 are formed by cutting using a milling cutter, for example. For example, the second outer surface 82 and the concave surface 83 are formed by cutting a portion of the peripheral wall 26 with an end mill extending in the Z direction and having an enlarged front end. In addition, the manufacturing method of the second outer surface 82 and the concave surface 83 is not limited to this example.

[0106] The side wall 52 of the second embodiment includes a covering portion 52c and a fitting portion 52d. The covering portion 52c protrudes from the upper wall 51 in the substantially -Z direction. The covering portion 52c is formed, for example, in a substantially rectangular frame shape corresponding to the second outer surface 82 of the peripheral wall 26 of the base 21. The covering portion 52c covers the entire circumference of the outer edge 23c of the outer cover 23, the entire area of ​​the second outer surface 82 of the peripheral wall 26, and the welded portion 29 provided on the outer edge 23c and the second outer surface 82. The covering portion 52c is in close contact with the entire circumference of the outer edge 23c of the outer cover 23 covered by the covering portion 52c, a portion of the second outer surface 82 of the peripheral wall 26, and the welded portion 29 provided on the outer edge 23c and the second outer surface 82.

[0107] The fitting portion 52d protrudes from the covering portion 52c toward the inside of the housing 11. The fitting portion 52d is formed, for example, in a substantially rectangular frame shape corresponding to the third portion 83c of the concave surface 83. The fitting portion 52d is received in the groove 85 and covers the third portion 83c of the concave surface 83. The fitting portion 52d is in close contact with (contact with) the third portion 83c of the concave surface 83 covered by the fitting portion 52d.

[0108] A portion 11c of the housing 11 including the welded portion 29 is located between the upper wall 51 and the fitting portion 52d of the side wall 52 in the Z direction. Therefore, the fitting portion 52d restricts the movement of the cover 23 in the +Z direction relative to the housing 11 by abutting against the third portion 83c of the concave surface 83. In other words, the fitting portion 52d restricts the movement of the cover 23 in the +Z direction relative to the housing 11 by being hooked on the third portion 83c.

[0109] In the HDD 10 of the second embodiment described above, the peripheral wall 26 has the first inner surface 26a and the second inner surface 26b facing the inner chamber 27, the first outer surface 61 and the second outer surface 82 located on the opposite side of the first inner surface 26a and the second inner surface 26b and facing the outside of the housing 11, the end surface 26e supporting the outer cover 23, and the concave surface 83 that is separated from the end surface 26e and is recessed from the first outer surface 61 and the second outer surface 82 toward the inside of the housing 11. The first protective member 41 covers at least a part of the outer cover 23 and the second outer surface 82 and is in contact with the concave surface 83. That is, a part 11c of the housing 11 is located between the upper wall 51 of the first protective member 41 covering the outer cover 23 and the fitting portion 52d of the first protective member 41 in contact with the concave surface 83 in the Z direction toward which the end surface 26e is directed. Thus, the fitting portion 52 d of the first protecting member 41 in contact with the concave surface 83 restricts the first protecting member 41 from being separated from the housing 11 in the Z direction, thereby restricting the first protecting member 41 from being detached from the housing 11 at will.

[0110] (Third embodiment)

[0111] Hereinafter, regarding the third embodiment, refer to Figure 5 Provide explanation. Figure 5 2 is an exemplary cross-sectional view showing a portion of the HDD 10 according to the third embodiment. Figure 5 As shown, the concave surface 83 of the third embodiment includes, for example, a bottom 83d, a first inclined portion 83e, and a second inclined portion 83f instead of the first portion 83a, the second portion 83b, and the third portion 83c. The second inclined portion 83f is an example of an inclined portion.

[0112] The bottom portion 83d is oriented, for example, in a direction substantially orthogonal to the Z axis. In other words, the bottom portion 83d is provided substantially parallel to the first outer surface 61 and the second outer surface 82. The first inclined portion 83e connects the bottom portion 83d and the first outer surface 61. The first inclined portion 83e is inclined so as to be away from the end surface 26e of the peripheral wall 26 as it goes from the first outer surface 61 to the inside of the housing 11.

[0113] The second inclined portion 83f connects the bottom portion 83d and the second outer surface 82. The second inclined portion 83f is closer to the end surface 26e than the bottom portion 83d and the first inclined portion 83e. The second inclined portion 83f is inclined so as to approach the end surface 26e of the peripheral wall 26 as it goes from the second outer surface 82 to the inside of the housing 11.

[0114] The second outer surface 82, the concave surface 83, and the groove 85 are formed by cutting using a milling cutter, for example. For example, the second outer surface 82 is formed by cutting a portion of the peripheral wall 26 with an end mill extending in the Z direction. Furthermore, the concave surface 83 and the groove 85 are formed by cutting a portion of the peripheral wall 26 with an end mill extending in a direction perpendicular to the Z axis and having an enlarged front end. In addition, the manufacturing method of the second outer surface 82, the concave surface 83, and the groove 85 is not limited to this example.

[0115] The side wall 52 of the third embodiment has a fitting portion 52e instead of the fitting portion 52d. The fitting portion 52e protrudes from the covering portion 52c toward the inside of the housing 11. The fitting portion 52e is formed, for example, in a substantially rectangular frame shape corresponding to the bottom 83d of the concave surface 83 and the second inclined portion 83f. The fitting portion 52e is accommodated in the groove 85, and covers a part of the bottom 83d of the concave surface 83 and the entire area of ​​the second inclined portion 83f. The fitting portion 52e is in close contact with (contact with) the bottom 83d and the second inclined portion 83f of the concave surface 83 covered by the fitting portion 52e.

[0116] A portion 11c of the housing 11 including the welded portion 29 is located between the upper wall 51 and the fitting portion 52e of the side wall 52 in the Z direction. Therefore, the second inclined portion 83f is located between the upper wall 51 of the first protective member 41 covering at least a portion of the outer cover 23 and the fitting portion 52e of the first protective member 41 in contact with the concave surface 83.

[0117] The fitting portion 52e is in contact with the second inclined portion 83f of the concave surface 83, thereby restricting the outer cover 23 from moving in the +Z direction relative to the housing 11. For example, when the outer cover 23 moves in the +Z direction relative to the housing 11, the fitting portion 52e moves toward the inner side of the housing 11 along the second inclined portion 83f. That is, the fitting portion 52e moves in a direction that goes deeper into the groove 85, rather than in a direction that is separated from the groove 85. Therefore, the second inclined portion 83f prevents the fitting portion 52e from being separated from the groove 85.

[0118] In the HDD 10 of the third embodiment described above, the concave surface 83 has a second inclined portion 83f. The second inclined portion 83f approaches the end surface 26e as it goes from the second outer surface 82 to the inside of the housing 11, and is located between the upper wall 51 of the first protective member 41 that covers at least a portion of the outer cover 23 and the fitting portion 52e of the first protective member 41 that contacts the concave surface 83. The first protective member 41 contacts the second inclined portion 83f. For example, when the first protective member 41 is to move in the Z direction toward which the end surface 26e is directed, the fitting portion 52e of the first protective member 41 that contacts the second inclined portion 83f is pulled toward the inside of the housing 11. As a result, the fitting portion 52e of the first protective member 41 that contacts the second inclined portion 83f restricts the first protective member 41 from leaving the housing 11 in the Z direction, and restricts the first protective member 41 from arbitrarily detaching from the housing 11.

[0119] In the above-mentioned embodiments, the first protection member 41 is attached to the housing 11 by utilizing elastic force. However, the first protection member 41 may be attached to the housing 11 in other forms as described below, for example.

[0120] Figure 6 : is an exemplary cross-sectional view showing a part of HDD 10 according to a modification of the embodiment. Figure 6 Although a part of the HDD 10 in which the first modification example is applied to the first embodiment is shown as an example, the first modification example can also be applied to the second embodiment or the third embodiment. Figure 6 In the first modified example shown, the first protective member 41 includes a covering wall 50 and an adhesive portion 101 .

[0121] The adhesive portion 101 is, for example, an adhesive or a double-sided tape. The adhesive or the double-sided tape is made of, for example, a synthetic resin. The adhesive portion 101 is interposed between the covering wall 50 and the housing 11. The adhesive portion 101 bonds the covering wall 50 to the housing 11. The adhesive portion 101, for example, covers the entire area of ​​the welding portion 29 and is closely attached to the welding portion 29.

[0122] According to the HDD 10 of the first modification described above, the first protective member 41 includes the resin cover wall 50 covering at least a portion of the welded portion 29 and the bonding portion 101 bonding the cover wall 50 to the housing 11. This prevents the first protective member 41 from being detached from the housing 11.

[0123] In the second modified example, the covering wall 50 of the first protective member 41 is attached to the housing 11. For example, the covering wall 50 made of resin is molded by outsert molding (injection molding on substrate) in a state of being attached to the metal housing 11. In addition, the covering wall 50 made of an adhesive synthetic resin such as tape or gel may be attached to the housing 11 after being manufactured separately from the housing 11. In addition, the covering wall 50 may be attached to the housing 11 by air pressure or magnetic field. In this way, the attachment form of the covering wall 50 to the housing 11 includes various forms such as fastening, adhesion, bonding, and adsorption.

[0124] In another example, the cover wall 50 attached to the housing 11 is formed by curing a thermosetting resin or a photocurable resin applied to the housing 11. In other words, the cover wall 50 may also be made of a thermosetting resin or a photocurable resin. The photocurable resin is cured by, for example, irradiating visible light, infrared rays, ultraviolet rays, or X-rays.

[0125] According to the HDD 10 of the second modified example described above, the first protective member 41 is attached to the housing 11. This prevents the first protective member 41 from being detached from the housing 11. In addition, the first protective member 41 made of a thermosetting resin or a photocurable resin can be easily adhered to the welded portion 29 by, for example, curing by heat or light in a state of being applied to the welded portion 29.

[0126] In the third modification, the covering wall 50 of the first protective member 41 is made of a material that shrinks when heated, such as a heat shrink film. For example, the covering wall 50 shrinks in such a way as to be closely attached to the welding portion 29 by being heated while covering the welding portion 29. In this case, the covering wall 50 shrinks at a temperature lower than the melting point of the welding portion 29.

[0127] According to the HDD 10 of the third modification described above, the first protective member 41 shrinks by being heated. For example, the first protective member 41 shrinks by being heated in a state of being in contact with the welded portion 29 , and can be easily brought into close contact with the welded portion 29 .

[0128] According to at least one embodiment described above, the first protective member made of resin covers at least a portion of the welding portion. Thus, for example, even if the disk device collides with another object, the first protective member will absorb the impact and prevent the impact from being transmitted to the welding portion. In addition, the welding portion is prone to deviation in shape compared to, for example, a portion formed by casting or cutting, and it is difficult to determine its relative position with the first protective member. However, the first protective member is made of resin, so it is usually softer than the welding portion, and it is possible to prevent strong external forces from being applied to the welding portion, for example, even if it interferes with the welding portion. Thus, the disk device of this embodiment can prevent the airtightness of the inner chamber from being damaged at the welding portion. For example, the disk device of this embodiment can prevent the reduction in the positioning performance of the magnetic head relative to the recording medium, which is caused by the increase in the rotational resistance of the recording medium and the magnetic head due to the external gas invading the inner chamber.

[0129] Several embodiments of the present invention have been described, but these embodiments are presented as examples 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 changes can be made without departing from the gist of the invention. These embodiments and their variations are included in the scope and gist of the invention, and are included in the invention described in the claims and their equivalents.

Claims

1. A disk device comprising: A disc-shaped recording medium having a recording layer; A magnetic head configured to read and write information to the recording medium; a housing having a base body provided with an inner chamber for accommodating the recording medium and the magnetic head, a cover covering the inner chamber, and a welding portion where the base body and the cover are welded; and a first protective member made of resin, located outside the housing and covering at least a portion of the welded portion; The housing has a first side surface and a second side surface located on the opposite side of the first side surface. The first protection member includes a first side wall abutting the first side surface and a second side wall abutting the second side surface, and is detachably mounted on the housing, wherein a distance between the first side wall and the second side wall is elastically expanded by the housing.

2. The disk device according to claim 1, The first protection member is in close contact with the welding portion.

3. The disk device according to claim 1, The first protective member covers the entire area of ​​the welded portion.

4. The disk device according to claim 1, further comprising: a connector, disposed at the first end of the housing and capable of being connected to an external device; and A second protective member made of metal is located outside the shell, covers at least one of a portion of the welded portion disposed at the first end and a second end of the shell located on the opposite side of the first end, and covers at least a portion of the first protective member.

5. A disk device comprising: A disc-shaped recording medium having a recording layer; A magnetic head configured to read and write information to the recording medium; a housing having a base body provided with an inner chamber for accommodating the recording medium and the magnetic head, a cover covering the inner chamber, and a welding portion where the base body and the cover are welded; and a first protective member made of resin, located outside the housing and covering at least a portion of the welded portion; The base body has a bottom wall and a peripheral wall protruding from the bottom wall and surrounding the inner chamber, The peripheral wall has an inner surface facing the inner chamber, an outer surface located on the opposite side of the inner surface and facing the outside of the housing, and an end surface supporting the cover. At the welding portion, the end surface and the cover are welded, The outer surface has an inclined surface which is closer to the inner chamber as it moves away from the end surface. The first protection member covers at least a portion of the cover and at least a portion of the outer surface, and is in contact with the inclined surface.

6. The disk device according to claim 5, The first protection member is in close contact with the welding portion.

7. The disk device according to claim 5, The first protective member covers the entire area of ​​the welded portion.

8. The disk device according to claim 5, further comprising: a connector, disposed at the first end of the housing and capable of being connected to an external device; and A second protective member made of metal is located outside the shell, covers at least one of a portion of the welded portion disposed at the first end and a second end of the shell located on the opposite side of the first end, and covers at least a portion of the first protective member.

9. A disk device comprising: A disc-shaped recording medium having a recording layer; A magnetic head configured to read and write information to the recording medium; a housing having a base body provided with an inner chamber for accommodating the recording medium and the magnetic head, a cover covering the inner chamber, and a welding portion where the base body and the cover are welded; and a first protective member made of resin, located outside the housing and covering at least a portion of the welded portion; The base body has a bottom wall and a peripheral wall protruding from the bottom wall and surrounding the inner chamber, The peripheral wall has an inner surface facing the inner chamber, an outer surface located on the opposite side of the inner surface and facing the outside of the shell, an end surface supporting the cover, and a concave surface that is separated from the end surface and recessed from the outer surface toward the inside of the shell. At the welding portion, the end surface and the cover are welded, The first protection member covers at least a portion of the cover and at least a portion of the outer surface, and is in contact with the concave surface.

10. The disk device according to claim 9, The first protection member is in close contact with the welding portion.

11. The disk device according to claim 9, The first protective member covers the entire area of ​​the welded portion.

12. The disk device according to claim 9, The concave surface includes an inclined portion that approaches the end surface as it goes from the outer surface to the inside of the housing and is located between a portion of the first protective member that covers at least a portion of the cover and a portion of the first protective member that contacts the concave surface. The first protection member is in contact with the inclined portion.

13. The disk device according to claim 9, further comprising: a connector, disposed at the first end of the housing and capable of being connected to an external device; and A second protective member made of metal is located outside the shell, covers at least one of a portion of the welded portion disposed at the first end and a second end of the shell located on the opposite side of the first end, and covers at least a portion of the first protective member.

14. A disk device comprising: A disc-shaped recording medium having a recording layer; A magnetic head configured to read and write information to the recording medium; a housing having a base body provided with an inner chamber for accommodating the recording medium and the magnetic head, a cover covering the inner chamber, and a welding portion where the base body and the cover are welded; and a first protective member having a Young's modulus lower than that of the welded portion, located outside the housing and covering at least a portion of the welded portion, The housing has a first side surface and a second side surface located on the opposite side of the first side surface. The first protection member includes a first side wall abutting the first side surface and a second side wall abutting the second side surface, and is detachably mounted on the housing, wherein a distance between the first side wall and the second side wall is elastically expanded by the housing.

15. The disk device according to claim 14, The first protection member is in close contact with the welding portion.

16. The disk device according to claim 14, The first protective member covers the entire area of ​​the welded portion.

17. The disk device according to claim 14, further comprising: a connector, disposed at the first end of the housing and capable of being connected to an external device; and A second protective member made of metal is located outside the shell, covers at least one of a portion of the welded portion disposed at the first end and a second end of the shell located on the opposite side of the first end, and covers at least a portion of the first protective member.

18. A disk device comprising: A disc-shaped recording medium having a recording layer; A magnetic head configured to read and write information to the recording medium; a housing having a base body provided with an inner chamber for accommodating the recording medium and the magnetic head, a cover covering the inner chamber, and a welding portion where the base body and the cover are welded; and a first protective member having a Young's modulus lower than that of the welded portion, located outside the housing and covering at least a portion of the welded portion, The base body has a bottom wall and a peripheral wall protruding from the bottom wall and surrounding the inner chamber, The peripheral wall has an inner surface facing the inner chamber, an outer surface located on the opposite side of the inner surface and facing the outside of the housing, and an end surface supporting the cover. At the welding portion, the end surface and the cover are welded, The outer surface has an inclined surface which is closer to the inner chamber as it moves away from the end surface. The first protection member covers at least a portion of the cover and at least a portion of the outer surface, and is in contact with the inclined surface.

19. The disk device according to claim 18, The first protection member is in close contact with the welding portion.

20. The disk device according to claim 18, The first protective member covers the entire area of ​​the welded portion.

21. The disk device according to claim 18, further comprising: a connector, disposed at the first end of the housing and capable of being connected to an external device; and A second protective member made of metal is located outside the shell, covers at least one of a portion of the welded portion disposed at the first end and a second end of the shell located on the opposite side of the first end, and covers at least a portion of the first protective member.

22. A disk device comprising: A disc-shaped recording medium having a recording layer; A magnetic head configured to read and write information to the recording medium; a housing having a base body provided with an inner chamber for accommodating the recording medium and the magnetic head, a cover covering the inner chamber, and a welding portion where the base body and the cover are welded; and a first protective member having a Young's modulus lower than that of the welded portion, located outside the housing and covering at least a portion of the welded portion, The base body has a bottom wall and a peripheral wall protruding from the bottom wall and surrounding the inner chamber, The peripheral wall has an inner surface facing the inner chamber, an outer surface located on the opposite side of the inner surface and facing the outside of the shell, an end surface supporting the cover, and a concave surface that is separated from the end surface and recessed from the outer surface toward the inside of the shell. At the welding portion, the end surface and the cover are welded, The first protection member covers at least a portion of the cover and at least a portion of the outer surface, and is in contact with the concave surface.

23. The disk device according to claim 22, The first protection member is in close contact with the welding portion.

24. The disk device according to claim 22, The first protective member covers the entire area of ​​the welded portion.

25. The disk device according to claim 22, The concave surface includes an inclined portion that approaches the end surface as it goes from the outer surface to the inside of the housing and is located between a portion of the first protective member that covers at least a portion of the cover and a portion of the first protective member that contacts the concave surface. The first protection member is in contact with the inclined portion.

26. The disk device according to claim 22, further comprising: a connector, disposed at the first end of the housing and capable of being connected to an external device; and A second protective member made of metal is located outside the shell, covers at least one of a portion of the welded portion disposed at the first end and a second end of the shell located on the opposite side of the first end, and covers at least a portion of the first protective member.

27. A disk device comprising: A magnetic disk, having a recording layer; A magnetic head configured to read and write data to the magnetic disk; a housing having a base body accommodating the magnetic disk and the magnetic head, a cover welded to the base body, and a welding portion welding the base body and the cover; and a protective member, located outside the housing, contacting and covering at least a portion of the welding portion, The housing has a first side surface and a second side surface located on the opposite side of the first side surface. The protection member includes a first side wall abutting the first side surface and a second side wall abutting the second side surface, and is detachably mounted on the housing, wherein a distance between the first side wall and the second side wall is elastically expanded by the housing.

Images