1. A disk device, comprising:

a magnetic disk;

a load beam having a 1 st side facing the disk;

a flexible member mounted on the 1 st surface;

a head unit having a magnetic head mounted to the flexible member and configured to read and write information from and to the magnetic disk, and a heating device mounted to the magnetic head and configured to heat the magnetic disk; and

and a 1 st regulating portion provided in the head unit, wherein the 1 st regulating portion abuts at least one of the load beam and the flexure when the magnetic head is separated from the 1 st surface by a 1 st distance.

2. The disk apparatus of claim 1,

the load beam is provided with a2 nd surface opposite to the 1 st surface and provided with holes opened on the 1 st surface and the 2 nd surface;

the flexible piece is provided with a 3 rd surface facing the 1 st surface;

the heating device is mounted to the magnetic head in a manner to pass through the hole;

the 1 st regulating part is provided to the heating device and partially covers at least one of the 2 nd surface and the 3 rd surface.

3. The disk apparatus of claim 2,

the heating device has a housing and an optical device housed in the housing and configured to irradiate the magnetic disk with light;

the 1 st restriction portion protrudes from the housing.

4. The disk apparatus of claim 3,

the 1 st regulating part protrudes from the housing in a 1 st direction along the 1 st surface;

in the 1 st direction, a sum of lengths of the heating device and the 1 st regulating portion is shorter than a length of the hole.

5. The disk apparatus of claim 3,

the 1 st regulating part protrudes from the housing in a 1 st direction along the 1 st surface;

in the 1 st direction, a total of lengths of the heating device and the 1 st regulating portion is longer than a length of the hole, and the length of the heating device is shorter than the length of the hole.

6. The disk apparatus of claim 2,

the heating device has a housing and an optical device housed in the housing and configured to irradiate the magnetic disk with light;

the 1 st regulating part is attached to the housing.

7. The disk apparatus of any one of claims 2 to 6,

the 1 st limiter partially covers the 2 nd surface, and when the magnetic head is separated from the 1 st surface by the 1 st distance, the 1 st limiter abuts against the 2 nd surface to limit the magnetic head from being separated from the 1 st surface by more than the 1 st distance.

8. The disk apparatus of any one of claims 2 to 6,

the flexible member has a fixed portion fixed to the load beam, and an elastic portion connected to the fixed portion and capable of elastically moving with respect to the fixed portion;

the magnetic head is arranged on the elastic part;

the 1 st regulating portion partially covers the 3 rd surface of the fixing portion, and when the magnetic head is separated from the 1 st surface by the 1 st distance, the 1 st regulating portion abuts against the 3 rd surface of the fixing portion to regulate the magnetic head from being separated from the 1 st surface by more than the 1 st distance.

9. The disk apparatus of any one of claims 1 to 6,

a carriage relatively movable with respect to the magnetic disk;

an end of the load beam in a2 nd direction along the 1 st surface is connected to the carriage;

the magnetic head has a 1 st end in the 2 nd direction and a2 nd end in a 3 rd direction opposite to the 2 nd direction;

the heating device is mounted on the magnetic head at a position closer to the 2 nd end than to the 1 st end.

10. The disk apparatus of claim 9,

the slider further includes a2 nd regulating portion provided in the flexure, the 2 nd regulating portion being separated from the 1 st regulating portion in the 2 nd direction, and the 2 nd regulating portion being configured to regulate the separation of the magnetic head from the 1 st surface beyond the 2 nd distance by abutting against at least one of the load beam and the flexure when the magnetic head is separated from the 1 st surface by the 2 nd distance.

11. A disk device, comprising:

a magnetic disk;

a load beam having a 1 st surface facing the disk and provided with a hole opened in the 1 st surface;

a flexible member mounted on the 1 st surface;

a magnetic head attached to the flexible member and configured to read and write information from and to the magnetic disk; and

a heating device configured to heat the magnetic disk, the heating device including a base portion attached to the magnetic head so as to extend from the magnetic head in a projecting direction intersecting the 1 st surface and passing through the hole, and a convex portion projecting from the base portion in a projecting direction intersecting the projecting direction and partially covering at least one of the load beam and the flexure in the projecting direction;

the cross-sectional area of the portion of the heating device where the convex portion is provided, the cross-sectional area being orthogonal to the extending direction, is larger than the cross-sectional area of the portion of the heating device passing through the hole, the cross-sectional area being orthogonal to the extending direction.

Background

There is known a disk device that reads and writes information from and to a magnetic disk by a Heat Assisted Magnetic Recording (HAMR) method. In the HAMR disk drive, a laser diode, for example, is mounted on a magnetic head.

Mass is added to the magnetic head by mounting a laser diode on the magnetic head. Therefore, for example, when an impact is applied to the disk device, the magnetic head may easily vibrate.

Disclosure of Invention

Embodiments of the present invention provide a disk device having improved impact resistance.

A disk device of one embodiment has a magnetic disk, a load beam (load beam), a flexure, a head unit, and a 1 st regulating portion. The load beam has a 1 st face facing the disk. The flexible piece is arranged on the 1 st surface. The head unit includes a magnetic head attached to the flexible material and configured to read and write information from and to the magnetic disk, and a heating device attached to the magnetic head and configured to heat the magnetic disk. The 1 st regulating portion is provided in the head unit, and the 1 st regulating portion abuts at least one of the load beam and the flexure when the magnetic head is separated from the 1 st surface by a 1 st distance.

Drawings

Fig. 1 is a plan view schematically showing a Hard Disk Drive (HDD) according to embodiment 1.

Fig. 2 is a perspective view schematically showing a Head Gimbal Assembly (HGA) according to embodiment 1.

Fig. 3 is a perspective view schematically showing a part of the HGA according to embodiment 1.

Fig. 4 is a perspective view schematically showing a part of the HGA according to embodiment 1 from a direction different from that of fig. 3.

Fig. 5 is a sectional view showing a part of the HGA according to embodiment 1.

Fig. 6 is a perspective view schematically showing the head unit according to embodiment 1.

Fig. 7 is a sectional view schematically showing an example of a method of mounting the head unit according to embodiment 1.

Fig. 8 is a perspective view schematically showing a head unit according to a modification of embodiment 1.

Fig. 9 is a sectional view showing a part of the HGA according to embodiment 2.

Fig. 10 is a perspective view schematically showing a head unit according to modification 1 of embodiment 2.

Fig. 11 is a perspective view schematically showing a head unit according to modification 2 of embodiment 2.

Fig. 12 is a sectional view schematically showing a part of the HGA according to embodiment 3.

Fig. 13 is a plan view schematically showing a part of the HGA22 of embodiment 4.

Fig. 14 is a sectional view schematically showing a part of the HGA according to embodiment 4.

Detailed Description

(embodiment 1)

Hereinafter, embodiment 1 will be described with reference to fig. 1 to 7. In the present specification, the constituent elements of the embodiments and the description of the elements may be described in a plurality of expressions. The constituent elements and their description are examples, and are not limited by the expression of the present specification. The constituent elements can be designated by names different from those in the present specification. Further, the constituent elements can be described by expressions different from those of the present specification.

Fig. 1 is a plan view schematically showing a Hard Disk Drive (HDD)10 according to embodiment 1. The HDD10 is an example of a disk device. The disk device may be another device such as a hybrid HDD.

As shown in fig. 1, the HDD10 has a case 11, a plurality of magnetic disks 12, a spindle motor 13, a plurality of actuator (actuator) assemblies 14, a Voice Coil Motor (VCM)15, a ramp loading mechanism 16, and a flexible printed wiring board (FPC) 17. In addition, FIG. 1 shows one disk 12 and one actuator assembly 14. The magnetic disk 12 can also be referred to as a recording medium.

The case 11 is made of metal such as aluminum alloy, for example. The case 11 is sealed with a lid, for example, and filled with a gas such as helium. Fig. 1 shows the open cassette 11 for illustration. The magnetic disk 12, the spindle motor 13, the actuator assembly 14, the VCM15, the ramp loading mechanism 16, and the FPC17 are housed inside the case 11.

The magnetic disk 12 magnetically records information by applying a magnetic field carrying the information. The plurality of magnetic disks 12 are stacked with a space therebetween, and are rotated about a rotation shaft 13a by a spindle motor 13.

The actuator assembly 14 has a carriage (carriage)21 and a plurality of Head Gimbal Assemblies (HGAs) 22. The HGA22 can also be referred to as a head suspension assembly.

The carriage 21 has an actuator module 21a and a plurality of carriage arms 21 b. The actuator module 21a is driven by the VCM15 to rotate about an arm shaft 21c substantially parallel to the rotation shaft 13 a. The plurality of carriage arms 21b are disposed at intervals from each other and extend in substantially the same direction from the actuator module 21 a. The carriage arm 21b is formed in a plate shape that can enter between adjacent magnetic disks 12.

As the actuator module 21a rotates, the carriage arm 21b moves in a direction along the surface of the disk 12. Thus, the carriage 21 can be relatively moved with respect to the magnetic disk 12.

The HGA22 is attached to the tip end portion of the corresponding carriage arm 21b and protrudes from the carriage arm 21 b. Thus, the plurality of HGAs 22 are arranged at intervals from each other in the direction in which the magnetic disks 12 are arranged.

Fig. 2 is a perspective view schematically showing an HGA22 according to embodiment 1. As shown in fig. 2, the HGA22 has a base plate 25, a hinge 26, a load beam 27, a flexure 28, and a head unit 29, respectively.

The base plate 25, the hinge 26 and the load beam 27 are made of, for example, stainless steel. Further, the materials of the base plate 25, the hinge 26, and the load beam 27 are not limited to this example.

The base plate 25 is formed in a plate shape and attached to the tip end portion of the carriage arm 21 b. The load beam 27 is formed in a plate shape thinner than the base plate 25. The load beam 27 is mounted to the top end portion of the base plate 25 via a hinge 26 having a spring property.

The flexible member 28 is formed in an elongated strip shape. Further, the shape of the flexible member 28 is not limited to this example. The flexible material 28 is a laminated board having a metal plate (backing layer) such as stainless steel, an insulating layer formed on the metal plate, a conductive layer formed on the insulating layer and constituting a plurality of wirings (wiring patterns), and a protective layer (insulating layer) covering the conductive layer, for example.

A head unit 29 is mounted on one end of the flexible material 28. The other end of the flexible member 28 is connected to an FPC 17. The FPC17 electrically connects the connector unit 29 and a controller disposed outside the case 11, for example, via wiring of the flexible material 28.

Fig. 3 is a perspective view schematically showing a part of the HGA22 of embodiment 1. Fig. 4 is a perspective view schematically showing a part of the HGA22 of embodiment 1 from a different direction from fig. 3. The head unit 29 reads and writes (records and reproduces) information from and from the magnetic disk 12 in, for example, a Heat Assisted Magnetic Recording (HAMR) system.

The head unit 29 has a magnetic head 31 shown in fig. 3 and a laser unit 32 shown in fig. 4. The laser unit 32 is an example of a heating device. The laser unit 32 is mounted on the magnetic head 31.

When the head unit 29 reads and writes information from and on the magnetic disk 12, the carriage 21 is driven by the VCM15, and the head unit 29 is disposed on a desired track (track) on the rotating magnetic disk 12. The head unit 29 reads and writes information from and on a desired track of the magnetic disk 12 as the magnetic disk 12 rotates.

The VCM15 rotates (loads) the head unit 29 over the disk 12 when accessing the disk 12. In addition, the VCM15 rotates and stops the head unit 29 to the position of the ramp loading mechanism 16 (unload) when unloading of the magnetic disk 12 is not to be accessed.

The HGA22 will be described in detail below. The load beam 27 extends in substantially the same direction as the direction in which the carriage arm 21b extends. Further, the direction in which the load beam 27 extends may be inclined with respect to the direction in which the carriage arm 21b extends.

As shown in the drawings, in the present specification, an X axis, a Y axis, and a Z axis are defined for convenience. The X, Y and Z axes are mutually orthogonal. The X-axis is disposed along the length of the load beam 27. In other words, the X-axis extends parallel to the direction in which the carriage arm 21b and the load beam 27 extend. The Y-axis is disposed along the width of the load beam 27. The Z-axis is located along the thickness of the load beam 27.

In the present specification, the X direction, the Y direction, and the Z direction are defined. The X direction is a direction along the X axis, and includes a + X direction indicated by an arrow on the X axis and an opposite direction of the arrow on the X axis, i.e., -X direction. The Y direction is a direction along the Y axis, and includes a + Y direction indicated by an arrow of the Y axis and an opposite direction of the arrow of the Y axis, i.e., -Y direction. The Z direction is a direction along the Z axis, and includes a + Z direction indicated by an arrow on the Z axis and a-Z direction opposite to the arrow on the Z axis.

The load beam 27 extends from the hinge 26 in the + X direction. The load beam 27 has a tip end portion 27a and a base end portion 27 b. The tip end portion 27a is an end portion of the load beam 27 in the + X direction. The base end portion 27b is an end portion of the load beam 27 in the-X direction. the-X direction is an example of the 2 nd direction. Further, the tip end portion 27a and the base end portion 27b include not only the end (edge) of the load beam 27 but also a portion in the vicinity of the end (edge). The base end portion 27b is connected to the carriage arm 21b of the carriage 21 via the hinge 26 and the base plate 25.

The load beam 27 is formed in a substantially triangular plate shape. The length (width) of the load beam 27 in the Y direction becomes shorter from the base end portion 27b toward the tip end portion 27 a. In other words, the load beam 27 is tapered in the + X direction (tip end taper). Further, the shape of the load beam 27 is not limited to this example.

Fig. 5 is a sectional view showing a part of HGA22 of embodiment 1. As shown in fig. 5, the load beam 27 also has a lower face 41, an upper face 42, and a dimple 43. In the present specification, the upper and lower designations are used for the purpose of explanation with reference to fig. 5, and are not intended to limit the positions and directions of the respective elements. The following 41 is an example of the 1 st aspect. The above 42 is an example of the 2 nd plane.

The lower face 41 is formed to be substantially flat and oriented in the-Z direction. At the time of loading, the lower face 41 faces the corresponding disk 12 via the space. When unloading, the lower face 41 faces the lower face 41 of the other load beam 27, for example via a gap. The upper face 42 is located opposite the lower face 41. The upper surface 42 is formed to be substantially flat and oriented in the + Z direction. The X direction and the Y direction are directions along the lower face 41 and the upper face 42. The Z direction is a direction orthogonal to the lower face 41 and the upper face 42. The dimples 43 are substantially hemispherical protrusions protruding from the lower surface 41.

The load beam 27 is provided with a 1 st insertion hole 45 and a2 nd insertion hole 46. The 1 st insertion hole 45 is an example of a hole. The 1 st insertion hole 45 and the 2 nd insertion hole 46 penetrate the load beam 27 and open in the lower surface 41 and the upper surface 42, respectively. The 1 st insertion hole 45 and the 2 nd insertion hole 46 may be notches.

The 1 st insertion hole 45 is separated from the pit 43 in the + X direction. The 2 nd insertion hole 46 is separated from the pocket 43 in the-X direction. That is, the dimple 43 is located between the 1 st insertion hole 45 and the 2 nd insertion hole 46.

The 1 st insertion hole 45 is, for example, a substantially rectangular (quadrangular) hole extending in the X direction. As shown in fig. 4, the 2 nd insertion hole 46 is formed in a substantially T-shape and has a wide portion 46a and a narrow portion 46 b.

The wide portion 46a is a substantially rectangular (quadrangular) portion extending in the Y direction. The narrow portion 46b is a substantially rectangular (quadrangular) portion extending from substantially the center of the wide portion 46a in the Y direction in the + X direction. In the Y direction, the length of the narrow portion 46b is shorter than the length of the wide portion 46 a.

As shown in fig. 5, the flexible member 28 has a lower face 51 and an upper face 52. The upper surface 52 is an example of the 3 rd surface. The lower face 51 faces in the general-Z direction. The upper face 52 faces in the substantially + Z direction. At least a portion of the upper face 52 of the flexure 28 faces the lower face 41 of the load beam 27.

As shown in fig. 3, the flexible member 28 also has at least one fixed portion 55, a universal joint (elastic support portion) 56, and a lug (tab) 57. The gimbal 56 is an example of an elastic portion. Lug 57 is an example of a2 nd limiter. The anchor 55, gimbal 56 and lug 57 are part of the flexible member 28. The fixed part 55 and the gimbal 56 have, in part, a lower face 51 and an upper face 52, respectively.

The upper face 52 of the fixing portion 55 is in contact with the lower face 41 of the load beam 27. The fixing portion 55 is fixed to the lower surface 41 of the load beam 27 by spot welding, for example. Thus, the flexure 28 is mounted to the underside 41 of the load beam 27.

The gimbal 56 is located near the top end portion 27a of the load beam 27. The gimbal 56 is connected to the fixed portion 55 and is elastically movable with respect to the load beam 27 and the fixed portion 55.

For example, the universal joint 56 has a tongue portion (tongue)56a and two arms 56 b. The magnetic head 31 of the head unit 29 is mounted on the lower surface 51 of the tongue portion 56 a. The upper surface 52 of the tongue 56a is swingably supported by the recess 43. Two arms 56b extend from the end of the tongue portion 56a in the + Z direction so as to surround the tongue portion 56a, and are connected to the fixing portion 55 separated from the tongue portion 56a in the-X direction.

The tongue portion 56a and the head unit 29 can move in a manner of swinging around the dimple 43 or separating from the lower face 41 of the load beam 27 by the elastic deformation of the two arms 56 b. Normally, the tongue portion 56a is held in a state of being in contact with the recess 43 by the elastic force of the arm 56 b.

As shown in fig. 4, the lug 57 has a through portion 57a and two extending portions 57 b. The insertion portion 57a extends from the end of the tongue portion 56a in the-X direction through the narrow portion 46b of the 2 nd insertion hole 46. The extension portion 57b extends in the Y direction from the insertion portion 57a at the distal end portion of the insertion portion 57 a. The extension 57b partially covers the upper face 42 of the load beam 27 in the Z direction. Therefore, in the Z direction, the load beam 27 is located between the extension portion 57b and the tongue portion 56 a.

Generally, the extension 57b is separated from the upper face 42 of the load beam 27 in the + Z direction. For example, sometimes an impact is applied to the HDD10, and the tongue 56a and the head unit 29 are separated from the lower face 41 and the dimple 43 of the load beam 27.

When the magnetic head 31 of the head unit 29 is separated from the lower surface 41 by a predetermined distance, the extension portion 57b of the lug 57 abuts the upper surface 42 of the load beam 27. Thus, the lugs 57 limit the separation of the magnetic head 31 from the lower face 41 beyond the above-mentioned predetermined distance. The above-mentioned predetermined distance is an example of the 2 nd distance. The extending portion 57b may abut on the upper surface 52 of the fixing portion 55 of the flexible material 28.

The lugs 57 are formed, for example, by bending a portion of the flexible member 28. When the tab 57 is bent, the insertion portion 57a passes through the narrow portion 46b of the 2 nd insertion hole 46, and the extended portion 57b passes through the wide portion 46a of the 2 nd insertion hole 46. The lug 57 is not limited to this example, and may be another member attached to the flexible member 28.

As shown in fig. 3, the magnetic head 31 is formed in a substantially rectangular parallelepiped shape. The magnetic head 31 has a 1 st end 31a and a2 nd end 31 b. The 1 st end 31a is an end of the magnetic head 31 in the-X direction. The 2 nd end 31b is an end of the magnetic head 31 in the + X direction. The + X direction is an example of the 3 rd direction. The 2 nd end 31b is located on the opposite side of the 1 st end 31 a.

As shown in fig. 5, the magnetic head 31 further has an opposing surface 61 and a mounting surface 62. The facing surface 61 faces the corresponding disk 12 at the time of loading. The attachment surface 62 is located on the opposite side of the facing surface 61, and is attached to the lower surface 51 of the tongue portion 56a with, for example, an adhesive.

During loading, the magnetic head 31 reads and writes information from and on the magnetic disk 12 while maintaining a state of being slightly lifted from the surface of the magnetic disk 12 by a lifting force generated by rotation of the magnetic disk 12. That is, the facing surface 61 is slightly separated from the magnetic disk 12 at the time of loading. The airflow generated by the rotation of the disk 12 flows between the disk 12 and the magnetic head 31 from the vicinity of the 1 st end 31a and flows out to the outside from the vicinity of the 2 nd end 31 b.

The magnetic head 31 also has a write element 65 and a read element 66. The write element 65 can also be referred to as a magnetic field generating element. The read-in element 66 can also be referred to as a reproduction element. The write element 65 is closer to the 2 nd end 31b than the read element 66.

The magnetic recording layer of the magnetic disk 12 is magnetized in a predetermined direction by the magnetic field generated by the write element 65, and information is recorded. The information recorded on the magnetic disk 12 is read by the read element 66. In this way, the magnetic head 31 is configured to read and write information from and to the magnetic disk 12 by the write element 65 and the read element 66.

The laser unit 32 is mounted on the mounting surface 62 of the magnetic head 31. The laser unit 32 irradiates a minute area of the magnetic recording layer of the magnetic disk 12, where information is recorded, with laser light L to heat the minute area. The coercive force of the heated minute region is lowered, and information is easily recorded. The laser unit 32 has a housing 71 and an optical device 72. The housing 71 may also be referred to as a cartridge, a housing, a casing, or a cover, for example.

Fig. 6 is a perspective view schematically showing the head unit 29 according to embodiment 1. The casing 71 is made of, for example, metal, and is formed in a substantially rectangular parallelepiped box shape. The housing 71 has a lower face 71a, an upper face 71b, a 1 st end face 71c and a2 nd end face 71d shown in fig. 5, and two side faces 71e shown in fig. 6.

As shown in FIG. 5, the lower face 71a faces in the-Z direction. The lower surface 71a is fixed to the mounting surface 62 of the magnetic head 31 by, for example, an adhesive. The upper surface 71b is located on the opposite side of the lower surface 71a and faces in the + Z direction.

The 1 st end face 71c is an end face of the housing 71 in the-X direction. The 2 nd end face 71d is located opposite to the 1 st end face 71 c. The 2 nd end face 71d is an end face of the housing 71 in the + X direction. The side surfaces 71e are both end surfaces of the housing 71 in the Y direction.

The laser unit 32 has a base portion 32 a. The base 32a includes a housing 71 and an optical device 72. The base portion 32a is attached to the magnetic head 31 in the vicinity of the 2 nd end portion 31 b. In other words, the base portion 32a is attached to the magnetic head 31 at a position closer to the 2 nd end portion 31b than to the 1 st end portion 31 a.

The base portion 32a protrudes from the 2 nd end portion 31b of the magnetic head 31 in the X direction. Therefore, the 2 nd end 31b of the magnetic head 31 is located between the 1 st end face 71c and the 2 nd end face 71d of the case 71 in the X direction. Therefore, a part of the lower surface 71a is exposed without being fixed to the magnetic head 31. A portion of the exposed lower face 71a faces the corresponding disk 12 when loaded.

The base portion 32a is attached to the attachment surface 62 of the magnetic head 31 so as to extend from the attachment surface 62 in the substantially Z direction. The substantially Z direction is a direction intersecting the lower surface 41, and is an example of the extending direction. The base portion 32a extends from the mounting surface 62 in the substantially Z direction so as to pass through the 1 st insertion hole 45. In other words, the base portion 32a is attached to the attachment surface 62 of the magnetic head 31 so as to pass through the 1 st insertion hole 45. The substantially Z direction is not limited to the longitudinal direction of the base portion 32 a.

A part of the base portion 32a protrudes from the lower surface 41 of the load beam 27 in the-Z direction through the 1 st insertion hole 45. The other part of the base portion 32a protrudes in the + Z direction from the upper surface 42 of the load beam 27 through the 1 st insertion hole 45. The base portion 32a is separated from the edge of the load beam 27 and other portions of the load beam 27 that form the 1 st insertion hole 45.

The optical device 72 is housed in the case 71. The optical device 72 includes, for example, a laser oscillation element and a lens. Further, the optical device 72 is not limited to this example. The optical device 72 is configured to emit laser light L from the lower surface 71a exposed from the case 71 and irradiate the magnetic disk 12 with the laser light L. Laser light L is an example of light.

Further, the optical device 72 is not limited to this example. For example, the optical device 72 may include a near-field light generating member that converts the laser light L into near-field light. In this case, near-field light is an example of light. The optical device 72 can heat the magnetic disk 12 by irradiating the magnetic disk 12 with near-field light.

As described above, the heating device exemplified by the laser unit 32 heats the micro region of the magnetic disk 12 by irradiating the magnetic disk 12 with the laser light L or the near-field light, and reduces the coercive force of the micro region. The heating device is not limited to this example, and the magnetic disk 12 may be heated by other means.

The laser unit 32 is provided with a projection 75. The convex portion 75 is an example of the 1 st regulating portion. In embodiment 1, the convex portion 75 protrudes in the + X direction from the 2 nd end surface 71d of the housing 71 at a position separated from the upper surface 42 of the load beam 27 in the + Z direction. In other words, the convex portion 75 protrudes from the base portion 32a in the + Z direction. The + X direction is a direction intersecting the substantially Z direction, and is an example of the 1 st direction and the projecting direction.

The convex portion 75 partially covers the upper surface 42 of the load beam 27 in the Z direction (substantially Z direction). In other words, the convex portion 75 and a part of the load beam 27 are arranged at the same position in the X direction. In addition, the load beam 27 is located between the convex portion 75 and the tongue portion 56a in the Z direction.

In the + X direction (X direction), the sum of the lengths of the laser unit 32 and the projection 75 is shorter than the length of the 1 st insertion hole 45. In other words, the sum of the distance between the 1 st end face 71c and the 2 nd end face 71d of the housing 71 and the length of the projection 75 is shorter than the length of the 1 st insertion hole 45 in the X direction.

In the Y direction, the length of the laser unit 32 is shorter than the length of the 1 st insertion hole 45. Further, the length of the convex portion 75 is shorter than the length of the 1 st insertion hole 45 in the Y direction. The length of the projection 75 in the Y direction may be the same as or different from the length of the laser unit 32.

The cross-sectional area of the portion of the laser unit 32 where the projection 75 is provided, which is orthogonal to the substantially Z direction, is larger than the cross-sectional area of the portion of the laser unit 32 that passes through the 1 st insertion hole 45, which is orthogonal to the substantially Z direction. In other words, the cross-sectional area of base portion 32a and convex portion 75 perpendicular to the substantially Z direction is larger than the cross-sectional area of base portion 32a perpendicular to the substantially Z direction. In the present embodiment, the area of the upper surface 71b of the housing 71 including the convex portion 75 is larger than the area of the lower surface 71a of the housing 71.

Generally, the convex portion 75 is separated from the upper face 42 of the load beam 27 in the + Z direction. For example, sometimes an impact is applied to the HDD10, and the tongue 56a and the head unit 29 are separated from the lower face 41 and the dimple 43 of the load beam 27.

When the magnetic head 31 of the head unit 29 is separated from the lower surface 41 by a predetermined distance, the convex portion 75 abuts on the upper surface 42 of the load beam 27. Thus, the convex portion 75 restricts the magnetic head 31 from being separated from the lower surface 41 beyond the predetermined distance. The above-mentioned predetermined distance is an example of the 1 st distance. The convex portion 75 may abut on the upper surface 52 of the fixing portion 55 of the flexible material 28.

As described above, the two positions where the projection 75 and the lug 57 are separated in the X direction restrict the magnetic head 31 from being separated from the lower face 41 beyond the predetermined distance. The lug 57 is separated from the projection 75 in the-X direction. In addition, in the X direction, the dimples 43 are located between the lugs 57 and the protrusions 75. The 1 st distance and the 2 nd distance may be the same or different from each other.

Hereinafter, an example of an assembly method of the HGA22 as a part of a manufacturing method of the HDD10 will be described. The method for manufacturing the HDD10 is not limited to the following method, and other methods may be used. First, the fixing portion 55 of the flexure 28 is fixed to the lower surface 41 of the load beam 27 by spot welding.

Fig. 7 is a sectional view schematically showing an example of a method of mounting the head unit 29 according to embodiment 1. As shown in fig. 7, the laser unit 32 is mounted on the magnetic head 31 in advance. For example, the magnetic head 31 and the laser unit 32 are inspected separately, and the magnetic head 31 and the laser unit 32 that are acceptable for quality standards are mounted to each other. Further, the check is not limited to this example.

The magnetic head 31 approaches the lower face 51 of the flexure 28 so that the laser unit 32 passes through the 1 st insertion hole 45. The size of the laser unit 32 including the convex portion 75 is smaller than that of the 1 st insertion hole 45 in the X direction and the Y direction. Therefore, the laser unit 32 can pass through the 1 st insertion hole 45.

In fig. 7, the head unit 29 before the laser unit 32 passes through the 1 st insertion hole 45 is shown by a two-dot chain line, and the head unit 29 after the laser unit 32 passes through the 1 st insertion hole 45 is shown by a solid line. As shown in fig. 7, at the timing when the laser unit 32 passes through the 1 st insertion hole 45, the convex portion 75 partially covers the 1 st insertion hole 45 but does not cover the upper surface 42 of the load beam 27.

Next, the head unit 29 is moved in the + X direction, which is the direction in which the convex portion 75 protrudes from the housing 71. Thereby, as shown in fig. 5, the convex portion 75 partially covers the upper surface 42 of the load beam 27. The mounting surface 62 of the magnetic head 31 is attached to the flexure 28 at a position where the projection 75 partially covers the upper surface 42. The HGA22 is assembled as described above.

In the HDD10 of embodiment 1 described above, the laser unit 32 that heats the magnetic disk 12 is attached to the magnetic head 31. Thus, the head unit 29 including the magnetic head 31 becomes heavy, and there is a possibility that the head unit 29 is easily vibrated to be separated from the lower face 41 by an impact acting on the HDD 10. However, in the present embodiment, the convex portion 75 is provided in the head unit 29. In the case where the magnetic head 31 is separated from the lower face 41 by a predetermined distance, the convex portion 75 restricts the separation of the magnetic head 31 from the lower face 41 beyond the predetermined distance by abutting against at least one of the load beam 27 and the flexure 28. That is, the head unit 29 which becomes easy to vibrate by adding the mass of the laser unit 32 is provided with the convex portion 75 for restricting the vibration exceeding a predetermined distance. Thus, in the HDD10 of the heat-assisted recording system on which the laser unit 32 is mounted, the magnetic head 31 can be prevented from being separated from the lower surface 41 by more than a predetermined distance. Therefore, for example, collision of the magnetic head 31 with another magnetic head 31 facing the magnetic head 31 can be suppressed. Further, for example, it is possible to suppress the plastic deformation of the gimbal 56 vibrated by the impact from interfering with the floating of the magnetic head 31. As described above, the shock resistance of the HDD10 is improved.

The convex portion 75 can be described as follows. That is, the convex portion 75 protrudes from the base portion 32a of the laser unit 32 in the + X direction, and partially covers at least one of the load beam 27 and the flexure 28 in the substantially Z direction. Therefore, when the magnetic head 31 is separated by a predetermined distance in the-Z direction, the protrusion 75 can restrict the separation of the magnetic head 31 from the lower surface 41 beyond the predetermined distance by coming into contact with at least one of the load beam 27 and the flexure 28. Therefore, for example, collision of the magnetic head 31 with another magnetic head 31 facing the magnetic head 31 can be suppressed, and shock resistance of the HDD10 can be improved.

The load beam 27 has an upper surface 42 on the opposite side of the lower surface 41, and is provided with a 1 st insertion hole 45. The flexible member 28 has an upper face 52 facing the lower face 41. The laser unit 32 is attached to the magnetic head 31 so as to pass through the 1 st insertion hole 45. The convex portion 75 is provided in the laser unit 32 and partially covers at least one of the upper surface 42 of the load beam 27 and the upper surface 52 of the flexure 28. Thus, when the magnetic head 31 is separated from the lower surface 41 by a predetermined distance, the convex portion 75 abuts against and is supported by at least one of the upper surfaces 42 and 52. Therefore, the convex portion 75 that restricts the movement of the magnetic head 31 by supporting can more reliably suppress the magnetic head 31 from being separated from the lower surface 41 by more than a predetermined distance, as compared with the case of using other means such as friction. The convex portion 75 provided in the laser unit 32 suppresses separation of the magnetic head 31 to which the laser unit 32 is attached from the load beam 27. Therefore, the magnetic head 31 can be more reliably prevented from being separated from the lower surface 41 by more than a predetermined distance, as compared with the case where the separation of the magnetic head 31 is suppressed at a position away from the laser unit 32.

The projection 75 projects from the housing 71 of the laser unit 32. This makes it easy to design the convex portion 75 as the 1 st regulating portion for regulating the movement of the magnetic head 31 beyond a predetermined distance.

The convex portion 75 protrudes from the housing 71 in the + X direction along the lower surface 41. In the + X direction, the sum of the lengths of the laser unit 32 and the projection 75 is shorter than the length of the 1 st insertion hole 45. Thus, when the magnetic head 31 on which the laser unit 32 is mounted in advance is mounted on the flexible material 28, the laser unit 32 can pass through the 1 st insertion hole 45. Therefore, the manufacture of the HDD10 becomes easy.

The width of the load beam 27 in the Y direction is tapered in the + X direction. The convex portion 75 protrudes from the housing 71 in the + X direction. This makes it easy to provide the load beam 27 with the 1 st insertion hole 45 that is long in the X direction.

The convex portion 75 partially covers the upper surface 42 of the load beam 27, and when the magnetic head 31 is separated from the lower surface 41 by a predetermined distance, the convex portion 75 abuts on the upper surface 42 to restrict the separation of the magnetic head 31 from the lower surface 41 beyond the predetermined distance. That is, the convex portion 75 abuts and is supported by the load beam 27. Accordingly, the convex portion 75 can more reliably prevent the magnetic head 31 from being separated from the lower surface 41 by more than a predetermined distance, for example, as compared with the case where the convex portion is supported by the elastically deformable portion of the flexible material 28.

A base end portion 27b as an end portion of the load beam 27 in the-X direction is directly or indirectly connected to the carriage 21. The magnetic head 31 has a 1 st end 31a in the-X direction and a2 nd end 31b in the + X direction opposite to the-X direction. The laser unit 32 is attached to the magnetic head 31 at a position closer to the 2 nd end 31b than to the 1 st end 31 a. That is, the laser unit 32 is mounted to the magnetic head 31 near the top end of the HGA 22. Therefore, there is a possibility that the head unit 29 is easily vibrated to be separated from the lower face 41 by the impact acting on the HDD 10. However, in the present embodiment, as described above, the head unit 29 is provided with the convex portion 75. Therefore, the magnetic head 31 can be suppressed from being separated from the lower face 41 by more than a predetermined distance.

The lug 57 is separated from the convex portion 75 in the X direction and is provided to the flexible member 28. In the case where the magnetic head 31 is separated from the lower face 41 by a predetermined distance, the lugs 57 restrict the separation of the magnetic head 31 from the lower face 41 beyond the predetermined distance by abutting against at least one of the load beam 27 and the flexure 28. That is, the two positions at which the projection 75 and the lug 57 are separated in the X direction restrict the movement of the magnetic head 31. This can more reliably prevent the magnetic head 31 from being separated from the lower surface 41 by more than a predetermined distance.

Fig. 8 is a perspective view schematically showing a head unit 29 according to a modification of embodiment 1. As shown in fig. 8, the projection 75 may protrude from the side face 71e of the housing 71 in the + Y direction or the-Y direction. In other words, the projection 75 may protrude from the base 32a of the laser unit 32 in the + Y direction or the-Y direction. In this case, the sum of the lengths of the laser unit 32 and the projection 75 is set to be at least partially shorter than the length of the 1 st insertion hole 45 in the Y direction.

(embodiment 2)

Hereinafter, embodiment 2 will be described with reference to fig. 9. In the following description of the embodiments, the same reference numerals as those of the above-described components are assigned to the components having the same functions as those of the above-described components, and the description thereof may be omitted. Note that a plurality of constituent elements given the same reference numeral are not limited to having the same functions and properties throughout, and may have different functions and properties according to the respective embodiments.

Fig. 9 is a sectional view showing a part of HGA22 of embodiment 2. As shown in fig. 9, in embodiment 2, the projection 75 projects in the + X direction from the 2 nd end face 71d of the housing 71. In the + X direction (X direction), the sum of the lengths of the laser unit 32 and the projection 75 is longer than the length of the 1 st insertion hole 45. In other words, the sum of the distance between the 1 st end face 71c and the 2 nd end face 71d of the housing 71 and the length of the projection 75 is longer than the length of the 1 st insertion hole 45 in the X direction.

On the other hand, in the + X direction (X direction), the length of the laser unit 32 is shorter than the length of the 1 st insertion hole 45. In other words, the distance between the 1 st end face 71c and the 2 nd end face 71d of the housing 71 in the X direction is shorter than the length of the 1 st insertion hole 45. The laser unit 32 is separated from the edge of the load beam 27 and other portions of the load beam 27 forming the 1 st insertion hole 45.

Hereinafter, an example of an assembly method of the HGA22, which is a part of the manufacturing method of the HDD10 of embodiment 2, will be described. First, the fixing portion 55 of the flexure 28 is fixed to the lower surface 41 of the load beam 27 by spot welding.

Next, before the laser unit 32 is mounted, the mounting surface 62 of the magnetic head 31 that has been inspected is mounted on the flexure 28. Next, the laser units 32 that have been inspected are brought close to the mounting surface 62 of the magnetic head 31 through the 1 st insertion holes 45. In fig. 9, the laser unit 32 before passing through the 1 st insertion hole 45 is shown by a two-dot chain line, and the laser unit 32 after passing through the 1 st insertion hole 45 is shown by a solid line.

The size of the laser unit 32 excluding the projection 75 is smaller than that of the 1 st insertion hole 45 in the X direction and the Y direction. Therefore, the laser unit 32 can pass through the 1 st insertion hole 45.

Next, the laser unit 32 is mounted on the mounting surface 62 of the magnetic head 31 at a position where the convex portion 75 partially covers the upper surface 42 of the load beam 27. The HGA22 is assembled as described above.

In the HDD10 of embodiment 2 described above, the protruding portion 75 protrudes from the housing 71 in the + X direction along the lower surface 41. In the + X direction, the sum of the lengths of the laser unit 32 and the projection 75 is longer than the length of the 1 st insertion hole 45. Also, in the + X direction, the length of the laser unit 32 is shorter than the length of the 1 st insertion hole 45. Thus, when the magnetic head 31 is separated from the lower surface 41 by a predetermined distance, the convex portion 75 can more reliably abut against at least one of the load beam 27 and the flexure 28. In addition, the size of the 1 st insertion hole 45 can be reduced. In the case of manufacturing the HDD10 of the present embodiment, the laser unit 32 is attached to the magnetic head 31 mounted in advance on the flexible material 28 so as to pass through the 1 st insertion hole 45. This can suppress the HDD10 from being complicated to manufacture.

Fig. 10 is a perspective view schematically showing a head unit 29 according to modification 1 of embodiment 2. Fig. 11 is a perspective view schematically showing a head unit 29 according to modification 2 of embodiment 2. As shown in fig. 10 and 11, a plurality of projections 75 may be provided on the head unit 29. In the example of fig. 10 and 11, two projections 75 project from the housing 71 of the base portion 32 a.

In the example of fig. 10, one of the convex portions 75 protrudes in the + X direction from the 1 st end face 71c of the housing 71 of the base portion 32 a. The other projection 75 projects from the 2 nd end face 71d of the housing 71 of the base 32a in the-X direction. The sum of the lengths of the laser unit 32 and the two convex portions 75 is set shorter than the length of the 1 st insertion hole 45 in the X direction.

In the example of fig. 11, two projections 75 project in the Y direction from two side surfaces 71e of the housing 71 of the base portion 32 a. In this case, the sum of the lengths of the laser unit 32 and the two convex portions 75 is set to be shorter than the length of the 1 st insertion hole 45 in the Y direction.

(embodiment 3)

Hereinafter, embodiment 3 will be described with reference to fig. 12. Fig. 12 is a sectional view schematically showing a part of HGA22 according to embodiment 3. As shown in fig. 12, in embodiment 3, the HDD10 further includes a regulating member 81 instead of the projection 75. The restricting member 81 is an example of the 1 st restricting portion. The HDD10 may have the protruding portion 75 and the restricting member 81 at the same time.

The regulating member 81 is made of, for example, metal and is formed in a plate shape. Further, the material and shape of the restricting member 81 are not limited to this example. The regulating member 81 is attached to the upper surface 71b of the housing 71 by an adhesive, for example.

A part of the regulating member 81 protrudes from the 2 nd end surface 71d of the housing 71 in the + X direction, for example, in the X direction. The restricting member 81 partially covers the upper face 42 of the load beam 27 in the Z direction.

In the X direction, the distance between the 1 st end surface 71c of the housing 71 and the end surface 81a of the restricting member 81 in the + X direction is longer than the length of the 1 st insertion hole 45. On the other hand, in the + X direction (X direction), the length of the laser unit 32 is shorter than the length of the 1 st insertion hole 45. In other words, the distance between the 1 st end face 71c and the 2 nd end face 71d of the housing 71 in the X direction is shorter than the length of the 1 st insertion hole 45. The laser unit 32 and the restricting member 81 are separated from the edge of the load beam 27 and other portions of the load beam 27 forming the 1 st insertion hole 45.

For example, sometimes an impact is applied to the HDD10, and the tongue 56a and the head unit 29 are separated from the lower face 41 and the dimple 43 of the load beam 27. When the magnetic head 31 of the head unit 29 is separated from the lower surface 41 by a predetermined distance, the regulating member 81 abuts on the upper surface 42 of the load beam 27. Thereby, the regulating member 81 regulates the magnetic head 31 from being separated from the lower face 41 by more than the above-mentioned predetermined distance. The above-mentioned predetermined distance is an example of the 1 st distance. The restricting member 81 may abut on the upper surface 52 of the fixing portion 55 of the flexible material 28.

Hereinafter, an example of an assembly method of the HGA22, which is a part of the manufacturing method of the HDD10 of embodiment 3, will be described. First, the fixing portion 55 of the flexure 28 is fixed to the lower surface 41 of the load beam 27 by spot welding. Then, the mounting surface 62 of the magnetic head 31 is mounted on the flexure 28.

The laser unit 32 may be mounted on the magnetic head 31 in advance, or may be mounted on the magnetic head 31 in a state of being mounted on the flexible material 28. When the magnetic head 31 approaches the flexure 28 or the laser unit 32 approaches the mounting surface 62 of the magnetic head 31, the laser unit 32 passes through the 1 st insertion hole 45.

Next, the restricting member 81 is attached to the upper surface 71b of the housing 71 at a position partially covering the upper surface 42 of the load beam 27. In fig. 12, the regulating member 81 before being attached to the laser unit 32 is shown by a two-dot chain line, and the regulating member 81 after being attached to the laser unit 32 is shown by a solid line. The HGA22 is assembled as described above.

In the HDD10 of embodiment 3 described above, the regulating member 81 is attached to the housing 71 of the laser unit 32. This eliminates the need to form the 1 st regulating portion, such as the regulating member 81, integrally with the laser unit 32, and thus the laser unit 32 provided with the 1 st regulating portion can be manufactured more easily.

(embodiment 4)

Hereinafter, embodiment 4 will be described with reference to fig. 13 and 14. Fig. 13 is a plan view schematically showing a part of the HGA22 of embodiment 4. Fig. 14 is a sectional view schematically showing a part of an HGA22 according to embodiment 4.

As shown in fig. 13, the load beam 27 according to embodiment 4 is provided with a 1 st insertion hole 91 instead of the 1 st insertion hole 45. The 1 st insertion hole 91 penetrates the load beam 27 and opens in the lower surface 41 and the upper surface 42.

The flexible member 28 according to embodiment 4 has a fixing portion 95 in addition to the fixing portion 55 according to embodiment 1. The fixing portion 95 is a part of the flexible member 28 as with the fixing portion 55. The fixing portion 95 partially has a lower face 51 and an upper face 52.

The upper surface 52 of the fixing portion 95 contacts the lower surface 41 of the load beam 27. The fixing portion 95 is fixed to the lower surface 41 of the load beam 27 at the welding portion S by spot welding, for example.

The fixing portions 55, 95 are made of a metal plate such as stainless steel, for example. The rigidity of the fixing portions 55, 95 is higher than that of the arm 56 b. The one fixing portion 55 is separated from the tongue portion 56a in the-X direction as in embodiment 1. The other fixing portion 95 is separated from the tongue portion 56a in the + X direction. That is, the tongue portion 56a is located between the two fixing portions 55.

In embodiment 4, the arm 56b connects the tongue portion 56a and the two fixing portions 55 and 95. The tongue portion 56a and the head unit 29 can move relative to the dimple 43, the load beam 27, and the two fixing portions 55, 95 by elastically deforming the arm 56 b.

As shown in fig. 14, the laser unit 32 is attached to the attachment surface 62 of the magnetic head 31 so as to pass through the 1 st insertion hole 91. The laser unit 32 is separated from the edge of the load beam 27 and other portions of the load beam 27 forming the 1 st insertion hole 91. The 1 st insertion hole 91 exposes at least a part of the upper surface 52 of the fixing portion 95. The laser unit 32 is also separated from the fixing portion 95.

The projection 75 partially covers the 1 st insertion hole 91 but does not cover the upper face 42 of the load beam 27. The convex portion 75 partially covers the upper surface 52 of the fixing portion 55 of the flexible material 28 in the Z direction (substantially Z direction). The convex portion 75 may cover both the upper surface 42 of the load beam 27 and the upper surface 52 of the fixing portion 55 of the flexure 28 in the Z direction.

In the + X direction (X direction), the sum of the lengths of the laser unit 32 and the projection 75 is shorter than the distance between the fixing portion 95 and the edge 91a of the 1 st insertion hole 91. The edge 91a is located at the end of the 1 st insertion hole 91 in the-X direction and extends in the substantially Y direction. The projecting direction of the projecting portion 75 and the dimension of the 1 st insertion hole 91 are not limited to this example, and can be designed in various ways as in the embodiments 2 to 3. The HDD10 according to embodiment 4 may include the regulating member 81 according to embodiment 3 in place of the convex portion 75.

In embodiment 4, for example, an impact may be applied to the HDD10, and the tongue 56a and the head unit 29 may be separated from the lower surface 41 and the dimple 43 of the load beam 27. When the magnetic head 31 of the head unit 29 is separated from the lower surface 41 by a predetermined distance, the convex portion 75 abuts on the upper surface 52 of the fixing portion 95 of the flexure 28. Thus, the convex portion 75 restricts the magnetic head 31 from being separated from the lower surface 41 beyond the predetermined distance. The above-mentioned predetermined distance is an example of the 1 st distance.

In the HDD10 of embodiment 4 described above, the flexible piece 28 includes the fixed portion 95 fixed to the load beam 27, and the gimbal 56 connected to the fixed portion 95 and elastically movable with respect to the fixed portion 95. The convex portion 75 partially covers the upper surface 52 of the fixing portion 95, and when the magnetic head 31 is separated from the lower surface 41 by a predetermined distance, the convex portion abuts against the upper surface 52 of the fixing portion 95 to restrict the separation of the magnetic head 31 from the lower surface 41 beyond the predetermined distance. That is, the convex portion 75 abuts and is supported by a portion of the flexible piece 28 that is fixed to the load beam 27. Accordingly, the convex portion 75 can more reliably prevent the magnetic head 31 from being separated from the lower surface 41 by more than a predetermined distance, for example, as compared with the case of supporting the gimbal 56 of the flexure 28.

In the above-described embodiments, the convex portion 75 and the regulating member 81 as an example of the 1 st regulating portion are provided in the laser unit 32. However, the 1 st limiter may be provided in another part of the head unit 29 such as the magnetic head 31. For example, the regulating member 81 may be attached to the magnetic head 31.

The above-described embodiments include the following technical ideas.

[1] A method of manufacturing a disc device, comprising:

passing a heating device mounted on the magnetic head through a hole opened in a 1 st surface of the load beam and a2 nd surface opposite to the 1 st surface;

moving the magnetic head from the heating device in a direction in which the 1 st surface protrudes toward the convex portion; and

the magnetic head is mounted on a flexure at a position where the convex portion partially covers the 2 nd surface.

[2] A method of manufacturing a disc device, comprising:

passing a heating device through a hole opened in a 1 st surface of the load beam and a2 nd surface opposite to the 1 st surface; and

the heating device is mounted on a magnetic head at a position where a convex portion protruding from the heating device along the 1 st surface partially covers the 2 nd surface.

[3] A method of manufacturing a disk device includes:

passing a heating device through a hole opened in a 1 st surface of the load beam and a2 nd surface opposite to the 1 st surface; and

a regulating member is attached to the heating device so as to partially cover the 2 nd surface.

According to at least one embodiment described above, a heating device that heats the magnetic disk is attached to the magnetic head. This makes the head unit including the magnetic head heavy, and the head unit is likely to vibrate away from the 1 st surface by an impact applied to the disk device. However, in the present embodiment, the 1 st regulating unit is provided in the head unit. The 1 st limiting portion limits the magnetic head from being separated from the 1 st surface by more than the 1 st distance by abutting against at least one of the load beam and the flexure when the magnetic head is separated from the 1 st surface by the 1 st distance. That is, the 1 st limiting portion for limiting the vibration exceeding the 1 st distance is provided at the head unit which becomes easy to vibrate by adding the mass of the heating device. Thus, in a disk device of a heat assisted recording (HAMR) system having a heating device mounted thereon, the magnetic head can be prevented from being separated from the 1 st surface by more than a predetermined 1 st distance. Therefore, for example, collision of the magnetic head with another magnetic head opposed to the magnetic head can be suppressed, and shock resistance of the disk device can be improved.

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 new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope equivalent to the invention described in the claims.