Disk drive

Abstract

The present invention provides a disk drive that allows the magnetic disk to be removed without removing the lamp and HSA from the housing. [Solution] A disk device according to one embodiment comprises a magnetic disk, a lamp, a HSA, and a housing. The lamp is rotatable between a first position covering the magnetic disk and a second position spaced apart from the magnetic disk. The HSA is rotatable between a load position, an unload position, and a retracted position spaced apart from the magnetic disk. The lamp has a first support portion that supports the lift tab moving between the load position and the unload position in the first position, and a second support portion that supports the lift tab moving between the unload position and the retracted position in the second position. The housing has a first contact portion that contacts the lamp in the first position, thereby restricting the rotation of the lamp.

Description

Technical Field

[0001] Embodiments of the present invention relate to a disk device.

Background Art

[0002] A disk device such as a hard disk drive (HDD) has, for example, a magnetic disk, a head stack assembly (HSA), a ramp, and a housing. The HSA moves between a load position where a slider of the HSA is positioned on the surface of the magnetic disk and an unload position where the HSA is held by the ramp.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A part of the ramp covers the magnetic disk. Also, when the HSA is in the unload position, for example, an arm of the HSA covers the magnetic disk. Therefore, in order to remove the magnetic disk from the housing, the ramp and the HSA must be removed before the magnetic disk.

[0005] An example of the problem solved by the present invention is to provide a disk device in which the magnetic disk can be removed without removing the ramp and the HSA from the housing.

Means for Solving the Problems

[0006] A disk drive according to one embodiment comprises a magnetic disk, a lamp, a head stack assembly, and a housing. The magnetic disk is rotatable about a first axis of rotation. The lamp is rotatable about a second axis of rotation between a first position covering the magnetic disk axially along the first axis of rotation and a second position spaced radially away from the magnetic disk, perpendicular to the first axis of rotation. The head stack assembly is rotatable about a third axis of rotation and includes a slider configured to read and write information to the magnetic disk, and a lift tab spaced further away from the third axis of rotation than the slider. The housing houses the magnetic disk, the lamp, and the head stack assembly. The head stack assembly is movable around the third rotation axis to a load position in which the slider is located on the magnetic disk, an unload position in which the head stack assembly covers the magnetic disk in the axial direction and the slider is separated from the magnetic disk, and a retracted position in which the head stack assembly is separated from the magnetic disk in the radial direction. The ramp has a first support portion configured to support the lift tab that moves between the load position and the unload position when the ramp is in the first position, and a second support portion configured to support the lift tab that moves between the unload position and the retracted position when the ramp is in the second position. The first position is separated from the second position in a first circumferential direction around the second rotation axis. The housing has a first contact portion configured to contact the ramp in the first position and restrict the ramp from rotating in the first circumferential direction. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is an illustrative perspective view showing a disassembled HDD according to the first embodiment. [Figure 2] Figure 2 is an exemplary plan view showing a portion of the HDD of the first embodiment. [Figure 3] Figure 3 is an illustrative plan view schematically showing the magnetic disk, HSA, and ramp load mechanism of the first embodiment. [Figure 4] Figure 4 is an exemplary side view showing the ramp road mechanism of the first embodiment. [Figure 5] Figure 5 is an exemplary plan view showing a portion of the HDD in the second position where the ramp load mechanism of the first embodiment is located. [Figure 6] Figure 6 is an exemplary perspective view showing the magnetic disk, HSA, and ramp load mechanism of the first embodiment. [Figure 7] Figure 7 is an exemplary plan view showing a part of the HDD according to the second embodiment. [Modes for carrying out the invention]

[0008] (First embodiment) The first embodiment will be described below with reference to Figures 1 to 6. Note that in this specification, the components of the embodiment and their descriptions may be described using multiple expressions. The components and their descriptions are examples and are not limited by the expressions used herein. Components may also be identified by names different from those used herein. Furthermore, components may also be described using expressions different from those used herein.

[0009] In the following explanation, “suppress” is defined, for example, to prevent the occurrence of an event, action, or effect, or to reduce the degree of an event, action, or effect. Also, in the following explanation, “restrict” is defined, for example, to prevent movement or rotation, or to permit movement or rotation within a predetermined range while preventing movement or rotation beyond that predetermined range.

[0010] Figure 1 is an exemplary perspective view showing a disassembled hard disk drive (HDD) 10 according to the first embodiment. The HDD 10 is an example of a disk device and may also be referred to as an electronic device, storage device, external storage device, or magnetic disk device. The HDD 10 in this embodiment is a 3.5-inch HDD. However, the HDD 10 may be other types of HDDs, such as a 2.5-inch HDD.

[0011] As shown in each drawing, the X, Y, and Z axes are defined herein for convenience. The X, Y, and Z axes are orthogonal to each other. The X axis is provided along the width of the HDD 10. The Y axis is provided along the length of the HDD 10. The Z axis is provided along the thickness of the HDD 10.

[0012] Furthermore, the X, Y, and Z directions are defined herein. The X direction is a direction along the X axis and includes the +X direction indicated by the X-axis arrow and the -X direction which is the opposite direction of the X-axis arrow. The Y direction is a direction along the Y axis and includes the +Y direction indicated by the Y-axis arrow and the -Y direction which is the opposite direction of the Y-axis arrow. The Z direction is a direction along the Z axis and includes the +Z direction indicated by the Z-axis arrow and the -Z direction which is the opposite direction of the Z-axis arrow.

[0013] As shown in Figure 1, the HDD 10 comprises a housing 11, a plurality of magnetic disks 12, a spindle motor 13, a head stack assembly (HSA) 14, a voice coil motor (VCM) 15, a ramp load mechanism 16, and a printed circuit board (PCB) 17. The magnetic disks 12 may also be referred to as disks, media, or platters. The ramp load mechanism 16 is an example of a ramp.

[0014] An internal space S is provided in the housing 11. The housing 11 houses a plurality of magnetic disks 12, a spindle motor 13, an HSA 14, a VCM 15, and a ramp load mechanism 16 in the internal space S.

[0015] The internal space S includes a first room R1 and a second room R2. The first room R1 is a substantially cylindrical space extending in the Z direction. The second room R2 is a substantially rectangular parallelepiped space. The end of the first room R1 in the -Y direction and the end of the second room R2 in the +Y direction communicate with each other.

[0016] A plurality of magnetic disks 12 and a spindle motor 13 are arranged in the first room R1. An HSA 14, a VCM 15, and a lamp loading mechanism 16 are arranged in the second room R2. Note that a part of the magnetic disk 12 may be in the second room R2, or a part of the HSA 14 may be in the first room R1. <000**********>

[0017] The housing 11 has a base 21, an inner cover 22, and an outer cover 23. The base 21, the inner cover 22, and the outer cover 23 are made of, for example, metal. Note that the housing 11 is not limited to this example.

[0018] The base 21 is formed in a substantially rectangular parallelepiped box shape that is open in the +Z direction. The base 21 has a bottom wall 25 and side walls 26. The bottom wall 25 is formed in a substantially rectangular (quadrilateral) plate shape. The bottom wall 25 has a bottom surface 25a. The bottom surface 25a generally faces in the +Z direction. The bottom surface 25a is a part of the inner surface of the housing 11 that defines the internal space S. The side walls 26 project from the edge of the bottom wall 25 in the substantially +Z direction and are formed in a substantially rectangular frame shape. The internal space S is provided inside the frame-shaped side walls 26.

[0019] The inner cover 22 is attached to the side walls 26, for example, by screws, and closes the internal space S. The outer cover 23 covers the inner cover 22 and is attached to the end of the side walls 26 in the +Z direction, for example, by welding.

[0020] The internal space S is filled with a gas different from air. For example, the internal space S is filled with gas through the vent 27 of the inner cover 22 and the vent 28 of the outer cover 23, and the vent 28 is sealed by a seal 29.

[0021] The gas that fills the internal space S is, for example, a low-density gas with a lower density than air, or a low-reactivity inert gas. For example, helium fills the internal space S. Other fluids may also fill the internal space S.

[0022] The magnetic disks 12 are formed in a disc shape and arranged to intersect the Z direction. Multiple magnetic disks 12 are arranged with spacing in the Z direction. The multiple magnetic disks 12 are held to the hub of the spindle motor 13, for example, by clamp springs. The spindle motor 13 rotates the multiple magnetic disks 12 relative to the housing 11 around a central axis Axd. The central axis Axd is an example of a first axis of rotation.

[0023] The central axis Axd is the virtual central axis of rotation of the magnetic disk 12 and extends approximately in the Z direction. The central axis Axd is both the central axis of the magnetic disk 12 and the central axis of the spindle motor 13. Note that the central axis Axd is not limited to this example.

[0024] In this specification, axial, radial, and circumferential directions are defined for a plurality of central axes, including the central axis Axd. The axial direction is the direction along the central axis. In this embodiment, the axial direction is equal to the Z direction. The radial direction is the direction perpendicular to the central axis. The circumferential direction is the direction around the central axis.

[0025] Figure 2 is an exemplary plan view showing a part of the HDD 10 of the first embodiment. As shown in Figure 2, each of the multiple magnetic disks 12 has a surface 12a and an outer edge 12b. The magnetic disk 12 has two surfaces 12a.

[0026] Each of the two surfaces 12a is formed to be substantially flat. One surface 12a is oriented substantially in the +Z direction. The other surface 12a is oriented substantially in the -Z direction. The outer edge 12b is the edge of the magnetic disk 12 in the radial direction of the central axis Axd and extends around the central axis Axd.

[0027] As shown in Figure 1, the housing 11 further has a support shaft 31. The support shaft 31 is spaced radially away from the magnetic disk 12 along the central axis Axd and extends, for example, from the bottom surface 25a of the bottom wall 25 in approximately the +Z direction. The HSA 14 is supported on the support shaft 31 so as to be rotatable around the central axis Axh relative to the housing 11. The central axis Axh is an example of a third axis of rotation.

[0028] The central axis Axh is the virtual central axis of rotation of the HSA14 and extends approximately in the Z direction. That is, the central axis Axh extends approximately parallel to the central axis Axd. The central axis Axh is the central axis of the support axis 31. Note that the central axis Axh is not limited to this example.

[0029] The circumferential direction of the central axis Axh includes the clockwise direction Dhc and the counterclockwise direction Dha, as shown in Figure 2. The clockwise direction Dhc is the clockwise direction around the central axis Axh in the projection view looking at the base surface 25a in the -Z direction, as shown in Figure 2. The counterclockwise direction Dha is the counterclockwise direction around the central axis Axh in the projection view looking at the base surface 25a in the -Z direction. In other words, the counterclockwise direction Dha is the opposite direction to the clockwise direction Dhc.

[0030] As shown in Figure 1, the HSA 14 includes a carriage 35, a plurality of head gimbal assemblies (HGAs) 36, and a flexible printed circuit board (FPC) 37. The carriage 35 includes an actuator block 41, a plurality of arms 42, and a coil holder 43.

[0031] The actuator block 41 is supported on a support shaft 31 via bearings, for example, so as to be rotatable around a central axis Axh. Each of the multiple arms 42 and coil holders 43 protrudes radially from the actuator block 41 along the central axis Axh.

[0032] Multiple arms 42 extend substantially parallel to the actuator block 41. The multiple arms 42 are arranged with spacing in the Z direction. Each of the multiple arms 42 can enter the gap between two adjacent magnetic disks 12. The coil holder 43 is located on the opposite side of the arms 42.

[0033] The VCM15 comprises a voice coil mounted on a coil holder 43, a pair of yokes, and magnets provided on the yokes. The VCM15 rotates the carriage 35 around its central axis Axh.

[0034] Figure 3 is an exemplary plan view schematically showing the magnetic disk 12, HSA 14, and ramp load mechanism 16 of the first embodiment. As shown in Figure 3, each of the HGA 36 has a base plate 45, a load beam 46, a flexure 47, and a slider 48.

[0035] The base plate 45 is attached to the end of the arm 42 radially outward from the central axis Axh. The load beam 46 is formed to be thinner than the base plate 45 and is attached to the base plate 45. The load beam 46 extends radially outward from the base plate 45 from the central axis Axh.

[0036] The load beam 46 has a lift tab 46a. The lift tab 46a is located at the end of the load beam 46 on the radially outer side of the central axis Axh. Also, the lift tab 46a is located at the end of the HSA 14 on the radially outer side of the central axis Axh. Therefore, the lift tab 46a is spaced further away from the central axis Axh than the slider 48. The lift tab 46a is formed, for example, in a substantially boat shape.

[0037] The flexiser 47 is formed in a long, narrow strip shape. However, the shape of the flexiser 47 is not limited to this example. The flexiser 47 is a type of FPC having a metal plate such as stainless steel (backing layer), an insulating layer (base layer) formed on the metal plate, a conductive layer formed on the insulating layer and constituting multiple wires (wiring patterns), and an insulating layer (cover layer) covering the conductive layer.

[0038] A gimbal (elastic support) 47a is provided at the end of the flexure 47 on the radially outer side of the central axis Axh. The gimbal 47a is positioned on the load beam 46 and is formed to be rotatable relative to the load beam 46. The slider 48 is mounted on the gimbal 47a.

[0039] The slider 48 has a head element that records and reproduces information on the recording layer of the magnetic disk 12. In other words, the slider 48 reads and writes information to the magnetic disk 12.

[0040] The VCM15 rotates the HSA14 around the central axis Axh. As shown in Figure 3, the HSA14 can move around the central axis Axh to the load position Pl and the unload position Pu.

[0041] At the load position Pl, the slider 48 is located on the surface 12a of the magnetic disk 12. Also at the load position Pl, the HGA 36 and arm 42 overlap the magnetic disk 12 in the axial direction, covering a portion of the magnetic disk 12 in the axial direction.

[0042] In the unload position Pu, the slider 48 moves away from the magnetic disk 12, and the HGA 36 is held by the ramp-load mechanism 16. On the other hand, in the unload position Pu, a portion of the HSA 14, such as the arm 42, overlaps the magnetic disk 12 in the axial direction and covers a portion of the magnetic disk 12 in the axial direction.

[0043] The FPC 37 shown in Figure 1 is connected to the end of the flexure 47 on the radially inner side of the central axis Axh. For example, multiple flexures 47 are connected to the FPC 37. As a result, the FPC 37 is electrically connected to multiple sliders 48 via the wiring of the multiple flexures 47.

[0044] The PCB 17 is located outside the enclosure 11 and is attached to the bottom wall 25 of the base 21. Various components such as interface (I / F) connectors, controllers, and relay connectors are mounted on the PCB 17. The PCB 17 is electrically connected to the FPC 37, for example, through a relay connector provided on the bottom wall 25.

[0045] As shown in Figure 2, the side wall 26 of the housing 11 has an inner circumferential surface 26a and an inner surface 26b. The inner circumferential surface 26a defines the first room R1. The inner surface 26b defines the second room R2.

[0046] The inner circumferential surface 26a is a substantially cylindrical curved surface extending around the central axis Axd. The inner circumferential surface 26a faces the outer edge 12b of the magnetic disk 12 with a gap between them. The inner circumferential surface 26a surrounds the magnetic disk 12 and the spindle motor 13. The gap between the inner circumferential surface 26a and the outer edge 12b is substantially constant.

[0047] As shown in Figure 1, the inner surface 26b is connected to two ends 26c and 26d of the inner circumferential surface 26a around the central axis Axd. End 26c is the end of the inner circumferential surface 26a in the clockwise direction around the central axis Axd in a projection view looking at the bottom surface 25a in the -Z direction. End 26d is the end of the inner circumferential surface 26a in the counterclockwise direction around the central axis Axd in a projection view looking at the bottom surface 25a in the -Z direction. The inner surface 26b surrounds the HSA 14, VCM 15, and ramp load mechanism 16.

[0048] As shown in Figure 2, the base 21 further comprises a base 51, a first projection 52, and a second projection 53. The base 51, the first projection 52, and the second projection 53 are located near the end 26c of the inner circumferential surface 26a of the second chamber R2.

[0049] The base 51 protrudes from the bottom surface 25a of the bottom wall 25. The base 51 is connected to the inner surface 26b. The base 51 has a mounting surface 51a. The mounting surface 51a is formed to be substantially flat and faces the +Z direction. In the Z direction, the mounting surface 51a is located between the bottom surface 25a and the end of the side wall 26 in the +Z direction. In other words, the base 51 is lower than the side wall 26.

[0050] Mounting holes 55 and screw holes 56 are provided in the base 51. The mounting holes 55 and screw holes 56 are spaced apart from each other and open into the mounting surface 51a. The cross-sections of the mounting holes 55 and screw holes 56, which are perpendicular to the Z direction, are formed to be approximately circular. Female threads are provided in the screw holes 56.

[0051] The first protrusion 52 and the second protrusion 53 protrude from the inner surface 26b and are connected to the mounting surface 51a of the base 51. The first protrusion 52 and the second protrusion 53 may be spaced apart from the base 51. The first protrusion 52 and the second protrusion 53 are spaced apart from each other. The first protrusion 52 is closer to the edge 26c of the inner circumferential surface 26a and closer to the magnetic disk 12 than the second protrusion 53.

[0052] The first projection 52 has a first contact surface 52a. The second projection 53 has a second contact surface 53a. The first contact surface 52a and the second contact surface 53a each extend from the mounting surface 51a in a substantially +Z direction and are formed to be substantially flat. The first contact surface 52a is, for example, machined to have a surface roughness less than that of the second contact surface 53a. Note that the first contact surface 52a and the second contact surface 53a are not limited to this example.

[0053] Figure 4 is an exemplary side view showing a ramp load mechanism 16 of the first embodiment. As shown in Figure 4, the ramp load mechanism 16 has a mounting portion 61, a pin 62, a wall 63, and a plurality of protrusions 64.

[0054] The mounting portion 61, pin 62, wall 63, and multiple protrusions 64 are integrally formed with each other and are made of, for example, synthetic resin. However, the mounting portion 61, pin 62, wall 63, and multiple protrusions 64 may be made of different materials or from other materials.

[0055] The mounting portion 61 is formed, for example, in a plate shape substantially perpendicular to the Z direction. The mounting portion 61 has a lower surface 61a, an upper surface 61b, and a side surface 61c. The lower surface 61a is formed substantially flat and faces the -Z direction. The lower surface 61a abuts against and is supported by the mounting surface 51a of the base 51. The upper surface 61b is located on the opposite side of the lower surface 61a. The upper surface 61b is formed substantially flat and faces the +Z direction. The side surface 61c extends substantially in the Z direction between the edge of the lower surface 61a and the edge of the upper surface 61b.

[0056] As shown in Figure 2, a through hole 65 is provided in the mounting portion 61. The through hole 65 penetrates the mounting portion 61 in a direction approximately Z-direction and opens to the lower surface 61a and the upper surface 61b. In this embodiment, the cross-section of the through hole 65 perpendicular to the Z-direction is formed to be approximately circular. However, the cross-section of the through hole 65 is not limited to this example and may be oval or arc-shaped.

[0057] As shown in Figure 4, the pin 62 protrudes from the lower surface 61a of the mounting portion 61 in a direction approximately -Z. The pin 62 is formed in a roughly cylindrical shape that extends in the Z direction. As shown in Figure 2, the pin 62 fits into the mounting hole 55 of the base 51. In this way, the ramp load mechanism 16 is attached to the housing 11.

[0058] Figure 5 is an exemplary plan view showing a portion of the HDD 10 in the second position P2 with respect to the ramp load mechanism 16 of the first embodiment. The ramp load mechanism 16 can rotate around a central axis Axr between the first position P1 shown in Figure 2 and the second position P2 shown in Figure 5. The central axis Axr is an example of a second axis of rotation.

[0059] The central axis Axr is the virtual central axis of rotation of the ramp load mechanism 16 and extends approximately in the Z direction. That is, the central axis Axr extends approximately parallel to the central axes Axd and Axh. The central axis Axr is the central axis of the mounting hole 55 and the pin 62. Note that the central axis Axr is not limited to this example.

[0060] The circumferential direction of the central axis Axr includes a first circumferential direction Dc1 and a second circumferential direction Dc2. The first circumferential direction Dc1 is the clockwise direction around the central axis Axr in the projection view looking at the base surface 25a in the -Z direction, as shown in Figure 2. The second circumferential direction Dc2 is the counterclockwise direction around the central axis Axr in the projection view looking at the base surface 25a in the -Z direction. That is, the second circumferential direction Dc2 is the opposite direction to the first circumferential direction Dc1.

[0061] The first position P1 is spaced apart from the second position P2 in the first circumferential direction Dc1. That is, the ramp road mechanism 16 can move to the first position P1 by rotating from the second position P2 in the first circumferential direction Dc1.

[0062] When the ramp load mechanism 16 is in the first position P1, the side surface 61c of the mounting portion 61 abuts against the first contact surface 52a and is spaced apart from the second projection 53 in the first circumferential direction Dc1. The first contact surface 52a abuts against the side surface 61c, thereby restricting the ramp load mechanism 16 in the first circumferential direction Dc1 when it is in the first position P1.

[0063] As shown in Figure 5, when the ramp load mechanism 16 is in the second position P2, the side surface 61c of the mounting portion 61 abuts against the second contact surface 53a and is spaced apart from the first protrusion 52 in the second circumferential direction Dc2. The second contact surface 53a abuts against the side surface 61c, thereby restricting the ramp load mechanism 16 in the second circumferential direction Dc2 when it is in the second position P2.

[0064] Figure 6 is an exemplary perspective view showing the magnetic disk 12, HSA 14, and ramp load mechanism 16 of the first embodiment. As shown in Figure 6, the wall 63 is formed in a plate shape, for example, intersecting the radial direction of the central axis Axr. As shown in Figure 2, the wall 63 has a first surface 63a, a second surface 63b, a back surface 63c, and a side surface 63d.

[0065] The first surface 63a and the second surface 63b are planes that intersect the radial direction of the central axis Axr. The first surface 63a and the second surface 63b may be curved surfaces or may have irregularities.

[0066] The first surface 63a is oriented toward the central axis Axh of the HSA 14 when the ramp load mechanism 16 is in the first position P1. That is, the first surface 63a is a plane that is approximately perpendicular to the radial direction of the central axis Axr when the ramp load mechanism 16 is in the first position P1.

[0067] The first surface 63a is spaced further from the central axis Axh of the HSA 14 than the lift tab 46a when the ramp load mechanism 16 is in the first position P1. In other words, the first surface 63a is located outside the range of rotation of the HSA 14 when the ramp load mechanism 16 is in the first position P1.

[0068] The second surface 63b is spaced further from the central axis Axd of the magnetic disk 12 than the first surface 63a. The edge of the first surface 63a in the clockwise direction Dhc and the edge of the second surface 63b in the counterclockwise direction Dha are connected to each other. Note that other surfaces may be provided between the first surface 63a and the second surface 63b.

[0069] The second surface 63b is inclined at an angle to the first surface 63a. As schematically shown in Figure 3, the angle θ1 between the first surface 63a and the second surface 63b is greater than 90° and less than 180°. Note that the angle θ1 is not limited to this example.

[0070] The second surface 63b is oriented toward the central axis Axh of the HSA 14 when the ramp load mechanism 16 is in the second position P2. That is, the second surface 63b is a plane that is approximately perpendicular to the radial direction of the central axis Axr when the ramp load mechanism 16 is in the second position P2.

[0071] The second surface 63b is spaced further from the central axis Axh of the HSA 14 than the lift tab 46a when the ramp load mechanism 16 is in the second position P2. In other words, the second surface 63b is located outside the range of rotation of the HSA 14 when the ramp load mechanism 16 is in the second position P2.

[0072] As shown in Figure 2, the radial direction of the central axis Axh includes the inward direction Dri and the outward direction Dro. The inward direction Dri is the radially inside of the central axis Axh. The outward direction Dro is the radially outside of the central axis Axh. Figure 2 illustrates the inward direction Dri and the outward direction Dro in one radial direction perpendicular to the central axis Axh. The first surface 63a at the first position P1 and the second surface 63b at the second position P2 face in the inward direction Dri.

[0073] The back surface 63c is located opposite the first surface 63a and the second surface 63b. The back surface 63c is connected to the mounting portion 61. The side surface 63d is located at the end of the wall 63 in the counterclockwise direction Dha. The side surface 63d is formed to be substantially flat and faces the counterclockwise direction Dha. The corner portion 63e between the back surface 63c and the side surface 63d is chamfered.

[0074] As shown in Figure 6, the multiple protrusions 64 project from the wall 63 approximately parallel to the central axis Axh. The multiple protrusions 64 are arranged with gaps in the axial direction. The number of protrusions 64 is equal to the number of magnetic disks 12.

[0075] Each of the multiple protrusions 64 supports two HGA 36 in the unloaded position Pu. That is, one side of the protrusion 64 supports one HGA 36 corresponding to one surface 12a of the magnetic disk 12. The other side of the protrusion 64 supports another HGA 36 corresponding to the other surface 12a of the magnetic disk 12.

[0076] The multiple protrusions 64 are formed, for example, in a block-like or plate-like shape extending in the circumferential direction of the central axis Axh. The multiple protrusions 64 have substantially the same shape as each other. However, the shape of the multiple protrusions 64 is not limited to this example. Each of the multiple protrusions 64 has a first support portion 71, a second support portion 72, and a limiter 73. The limiter 73 may also be called a slider limiter.

[0077] The first support portion 71 is a part of the projection 64 that protrudes from the first surface 63a. The first support portion 71 has two flat surfaces 71a, 71b, two inclined surfaces 71c, 71d, an end surface 71e, and a side surface 71f. Note that the first support portion 71 is not limited to this example. The end surface 71e is an example of the edge of the first support portion.

[0078] Planes 71a and 71b are planes that are approximately perpendicular to the Z direction and oriented in approximately the same direction. In the Z direction, plane 71a is spaced further away from the surface 12a of the corresponding magnetic disk 12 than plane 71b. Plane 71b is spaced further away from the central axis Axd of the magnetic disk 12 than plane 71a.

[0079] The inclined plane 71c extends obliquely to the plane 71a between the end of the first support portion 71 in the counterclockwise direction Dha and the plane 71a. The inclined plane 71c extends from the plane 71a toward the surface 12a of the corresponding magnetic disk 12. The inclined plane 71d extends between the two planes 71a and 71b.

[0080] The end face 71e is located at the end of the first support portion 71 in the inward direction Dri. The end face 71e faces the central axis Axh when the ramp load mechanism 16 is in the first position P1. The end face 71e extends around the central axis Axh when the ramp load mechanism 16 is in the first position P1. Therefore, when the ramp load mechanism 16 is in the first position P1, the first support portion 71 as a whole extends around the central axis Axh.

[0081] When the ramp load mechanism 16 is in the first position P1, the end face 71e is spaced further from the central axis Axh of the HSA 14 than the slider 48. In other words, when the ramp load mechanism 16 is in the first position P1, the end face 71e is located outside the range of rotation of the slider 48.

[0082] On the other hand, when the ramp load mechanism 16 is in the first position P1, the end face 71e is closer to the central axis Axh of the HSA 14 than at least a portion of the lift tab 46a. That is, when the ramp load mechanism 16 is in the first position P1, the first support portion 71 is located on the trajectory on which the lift tab 46a rotates.

[0083] As shown in Figure 2, the side surface 71f is located at the end of the first support portion 71 in the counterclockwise direction Dha. The side surface 71f is formed to be substantially flat and faces the counterclockwise direction Dha. The side surface 71f of the first support portion 71 is continuous with the side surface 63d of the wall 63.

[0084] The second support portion 72 is a part of the projection 64 that protrudes from the second surface 63b. Therefore, the second support portion 72 is spaced further away from the central axis Axd of the magnetic disk 12 than the first support portion 71.

[0085] As shown in Figure 6, the second support portion 72 has a flat surface 72a, an inclined surface 72b, and an end surface 72c. Note that the second support portion 72 is not limited to this example. The end surface 72c is an example of the edge of the second support portion.

[0086] Plane 72a is connected to the end of plane 71b of the first support portion 71 in the clockwise direction Dhc, and is continuous with plane 71b. That is, plane 71b of the first support portion 71 and plane 72a of the second support portion 72 form a single plane.

[0087] The end of the inclined plane 72b in the counterclockwise direction Dha connects to the end of the plane 72a. In the Z direction, the end of the inclined plane 72b in the clockwise direction Dhc is closer to the surface 12a of the corresponding magnetic disk 12 than to the plane 72a.

[0088] The end face 72c is located at the end of the second support portion 72 in the inward direction Dri. The end face 72c faces the central axis Axh when the ramp load mechanism 16 is in the second position P2. The end face 72c extends around the central axis Axh when the ramp load mechanism 16 is in the second position P2. Therefore, when the ramp load mechanism 16 is in the second position P2, the second support portion 72 as a whole extends around the central axis Axh.

[0089] When the ramp load mechanism 16 is in the second position P2, the end face 72c is spaced further from the central axis Axh of the HSA 14 than the slider 48. In other words, when the ramp load mechanism 16 is in the second position P2, the end face 72c is located outside the range of rotation of the slider 48.

[0090] On the other hand, when the ramp load mechanism 16 is in the second position P2, the end face 72c is closer to the central axis Axh of the HSA 14 than at least a portion of the lift tab 46a. That is, when the ramp load mechanism 16 is in the second position P2, the second support portion 72 is located on the trajectory on which the lift tab 46a rotates.

[0091] As schematically shown in Figure 3, the angle θ2 between the end face 71e of the first support portion 71 and the end face 72c of the second support portion 72 is greater than 90° and less than 180°. Note that the angle θ2 is not limited to this example. When the end faces 71e and 72c are arc-shaped, the angle θ2 is the angle between the tangent to the center of the end face 71e about the central axis Axh and the tangent to the center of the end face 72c about the central axis Axh.

[0092] As shown in Figure 6, the limiter 73 protrudes inward in the Dri direction from the end face 71e of the first support portion 71 and the end face 72c of the second support portion 72. For example, the limiter 73 is located approximately in the center of the projection 64 in the Z direction. The limiter 73 is formed in the shape of a thin plate extending in the circumferential direction of the central axis Axh.

[0093] In the circumferential direction of the central axis Axh, the limiter 73 is provided over substantially the entire area of ​​the second support portion 72 and also on the portion of the first support portion 71 that has a flat surface 71b. Note that the limiter 73 is not limited to this example.

[0094] Each of the multiple protrusions 64 is provided with a notch 75. The notch 75 is provided at the end of the protrusion 64 in the counterclockwise direction Dha. That is, the notch 75 is provided in the first support portion 71. The notch 75 may extend from the protrusion 64 to the wall 63.

[0095] When the ramp load mechanism 16 is in the first position P1, a portion of the magnetic disk 12 is positioned in the notch 75. Therefore, as shown in Figure 2, when the ramp load mechanism 16 is in the first position P1, a portion of the ramp load mechanism 16 covers the magnetic disk 12 in the axial direction.

[0096] As shown in Figure 6, when the ramp load mechanism 16 is in the second position P2, the magnetic disk 12 is located outside the notch 75. As shown in Figure 5, when the ramp load mechanism 16 is in the second position P2, it is spaced apart from the magnetic disk 12 in the radial direction of the central axis Axd.

[0097] As shown in Figures 2 and 5, when the ramp road mechanism 16 is in the first position P1, the first support portion 71 is closer to the edge 26c of the inner circumferential surface 26a than when the ramp road mechanism 16 is in the second position P2. In other words, as the ramp road mechanism 16 rotates from the first position P1 to the second position P2, the first support portion 71 moves away from the edge 26c of the inner circumferential surface 26a.

[0098] As shown in Figure 5, when the ramp load mechanism 16 is in the second position P2, the side surface 63d of the wall 63 and the side surface 71f of the first support portion 71 face the outer edge 12b of the magnetic disk 12. Alternatively, when the ramp load mechanism 16 is in the second position P2, the corner portion 63e of the wall 63 may also face the outer edge 12b of the magnetic disk 12.

[0099] As virtually shown by the dashed line in Figure 5, the HDD 10 further has a screw 81. The screw 81 passes through the through hole 65 of the mounting portion 61 and engages with the screw hole 56 of the base 51, regardless of whether the ramp load mechanism 16 is in the first position P1 or the second position P2. In this way, the screw 81 fixes the ramp load mechanism 16 to the housing 11.

[0100] The position of the through-hole 65 when the ramp road mechanism 16 is in the first position P1 is different from the position of the through-hole 65 when the ramp road mechanism 16 is in the second position P2. However, the diameter of the through-hole 65 is larger than the diameter of the screw hole 56. Therefore, the through-hole 65 communicates with the screw hole 56 regardless of whether the ramp road mechanism 16 is in the first position P1 or the second position P2.

[0101] The screw 81 fastens the mounting portion 61 of the ramp load mechanism 16 to the base 51, thereby fixing the ramp load mechanism 16 to the housing 11. In other words, the mounting portion 61 is held between the mounting surface 51a of the base 51 and the screw head of the screw 81. This prevents the ramp load mechanism 16 from moving undesirably around the central axis Axr.

[0102] During the operation of the HDD 10, the ramp load mechanism 16 is in a first position P1 and is fixed by a screw 81. As shown in Figure 3, when the ramp load mechanism 16 is in the first position P1, the first support portion 71 supports the lift tab 46a which moves between the load position Pl and the unload position Pu.

[0103] For example, when the HSA 14 is in the load position Pl, the slider 48 is on the surface 12a of the magnetic disk 12, and the lift tab 46a is spaced away from the projection 64. When the HSA 14 moves from the load position Pl to the unload position Pu, it rotates in a clockwise direction Dhc.

[0104] As the HSA14 rotates clockwise in the Dhc direction, the lift tab 46a comes into contact with the inclined surface 71c of the first support portion 71. As the HSA14 rotates further clockwise in the Dhc direction, the lift tab 46a moves along the inclined surface 71c and moves away from the surface 12a of the magnetic disk 12 in the axial direction.

[0105] When the lift tab 46a moves axially away from the surface 12a of the magnetic disk 12 to a predetermined distance, the slider 48 also moves axially away from the surface 12a of the magnetic disk 12. That is, the slider 48 is pulled away from the surface 12a of the magnetic disk 12. The slider 48 moves away from the surface 12a of the magnetic disk 12 before the lift tab 46a reaches the plane 71a.

[0106] As the HSA14 rotates further in the clockwise direction Dhc, the lift tab 46a is sequentially supported on the plane 71a, the inclined plane 71d, and the plane 71b. The HSA14 stops rotating when the lift tab 46a reaches the end of the plane 71b in the clockwise direction Dhc (unload position Pu). The unload position Pu may also be referred to as the home position.

[0107] As shown in Figure 6, when the HSA14 is in the unloaded position Pu, the limiter 73 is positioned between the two gimbals 47a. For example, if the HGA36 vibrates in the Z direction due to an external force, the two sliders 48 may move closer to each other. In this case, the limiter 73 can prevent the two sliders 48 from interfering with each other by contacting the two gimbals 47a.

[0108] For example, in the repair (rework) of HDD 10, the magnetic disk 12 may be replaced. In the rework of this embodiment, the ramp load mechanism 16 is moved from a first position P1 to a second position P2. For example, the screw 81 is loosened, and the ramp load mechanism 16 is moved around the central axis Axr from the first position P1 to the second position P2. The ramp load mechanism 16 is fixed in the second position P2 by the screw 81.

[0109] When the ramp load mechanism 16 is in the first position P1, the second surface 63b is located on the track of the lift tab 46a, and the second support portion 72 is located on the track of the slider 48. Therefore, the second surface 63b may interfere with the lift tab 46a, and the second support portion 72 may interfere with the slider 48. However, by moving the ramp load mechanism 16 to the second position P2, the HSA 14 can rotate further clockwise in the Dhc direction from the unload position Pu.

[0110] As shown in Figure 3, when the ramp load mechanism 16 is in the second position P2, the HSA 14 can move around the central axis Axh to the unload position Pu and the retracted position Pa. In the retracted position Pa, the HSA 14 is spaced away from the magnetic disk 12 in the radial direction of the central axis Axd. That is, in the retracted position Pa, neither the HGA 36 nor the arm 42 covers the magnetic disk 12.

[0111] When the HSA14 moves from the unload position Pu to the retracted position Pa, it rotates clockwise in the Dhc direction. The planes 71b of the first support portion 71 and 72a of the second support portion 72, which are continuous with each other, support the lift tab 46a which rotates clockwise in the Dhc direction.

[0112] The HSA14 stops rotating when the lift tab 46a reaches the end of the plane 72a in the clockwise direction Dhc (retracted position Pa). As described above, when the ramp load mechanism 16 is in the second position P2, the second support portion 72 supports the lift tab 46a moving between the unload position Pu and the retracted position Pa.

[0113] When the ramp load mechanism 16 is in the second position P2 and the HSA 14 is in the retracted position Pa, the magnetic disk 12 is not covered by either the HSA 14 or the ramp load mechanism 16. As a result, the magnetic disk 12 becomes movable in the axial direction and can be removed from the housing 11.

[0114] Furthermore, a new magnetic disk 12 is mounted on the housing 11. The HSA 14 in the retracted position Pa and the ramp load mechanism 16 in the second position P2 can be prevented from interfering with the magnetic disk 12 mounted on the housing 11.

[0115] When a new magnetic disk 12 is installed in the housing 11, the HSA 14 is rotated from the retracted position Pa to the unloaded position Pu. After the HSA 14 moves to the unloaded position Pu, the screw 81 is loosened, and the ramp load mechanism 16 is rotated from the second position P2 to the first position P1. The replacement of the magnetic disk 12 is completed when the ramp load mechanism 16 is fixed in the first position P1 by the screw 81.

[0116] When the ramp load mechanism 16 is in the second position P2, the first surface 63a is located on the track of the lift tab 46a, and the first support portion 71 is located on the track of the slider 48. Therefore, the first surface 63a may interfere with the lift tab 46a, and the first support portion 71 may interfere with the slider 48. However, by moving the ramp load mechanism 16 to the first position P1, the HSA 14 can rotate from the unload position Pu to the load position Pl.

[0117] When the HDD 10 is assembled, first the magnetic disk 12 is mounted in the enclosure 11. Next, the ramp load mechanism 16 is mounted in the enclosure 11 so that it is positioned at the second position P2.

[0118] Next, the HSA 14 is mounted on the support shaft 31 of the housing 11 so as to move away from the ramp load mechanism 16 in a clockwise direction Dhc. As the HSA 14 is rotated counterclockwise in Dha, the lift tab 46a comes into contact with the inclined surface 72b of the second support portion 72. As the HSA 14 rotates further counterclockwise in Dha, the lift tab 46a moves along the inclined surface 72b and the plane 72a to reach the unload position Pu.

[0119] Next, the ramp load mechanism 16 is rotated from the second position P2 to the first position P1. Furthermore, the ramp load mechanism 16 is fixed in the first position P1 by a screw 81. This makes the HSA 14 movable between the load position Pl and the unload position Pu.

[0120] The assembly of the HDD 10 is not limited to the above example. For example, the ramp load mechanism 16 may be mounted to the enclosure 11 before the magnetic disk 12, so that it is positioned at the second position P2. Because the ramp load mechanism 16 is at the second position P2, the magnetic disk 12 can be mounted to the enclosure 11 without interfering with the ramp load mechanism 16.

[0121] As shown in Figure 3, the HDD 10 further includes a stopper 91. The stopper 91 is, for example, removable and attached to the housing 11 or VCM 15. The stopper 91 contacts the carriage 35 of the HSA 14 in the unload position Pu, thereby restricting the HSA 14 from rotating from the unload position Pu toward the retracted position Pa.

[0122] The stopper 91 can prevent the second surface 63b at the first position P1 from interfering with the lift tab 46a, and the second support portion 72 at the first position P1 from interfering with the slider 48. During rework, the stopper 91 is removed from the housing 11 or VCM 15 after the ramp load mechanism 16 has rotated from the first position P1 to the second position P2.

[0123] In the HDD 10 according to the first embodiment described above, the magnetic disk 12 is rotatable around Axd. The ramp load mechanism 16 is rotatable around the central axis Axr between a first position P1 and a second position P2. At the first position P1, the ramp load mechanism 16 covers the magnetic disk 12 in an axial direction along the central axis Axd. At the second position P2, the ramp load mechanism 16 moves away from the magnetic disk 12 in a radial direction perpendicular to the central axis Axd. The HSA 14 is rotatable around the central axis Axh and has a slider 48 and a lift tab 46a. The slider 48 is configured to read and write information to the magnetic disk 12. The lift tab 46a is further away from the central axis Axh than the slider 48. The housing 11 houses the magnetic disk 12, the ramp load mechanism 16, and the HSA 14.

[0124] The HSA14 is movable around its central axis Axh to a load position Pl, an unload position Pu, and a retracted position Pa. In the load position Pl, the slider 48 is positioned above the magnetic disk 12. In the unload position Pu, the HSA14 covers the magnetic disk 12 in the axial direction, and the slider 48 is separated from the magnetic disk 12. In the retracted position Pa, the HSA14 is separated from the magnetic disk 12 in the radial direction.

[0125] The ramp load mechanism 16 has a first support portion 71 and a second support portion 72. The first support portion 71 is configured to support a lift tab 46a that moves between a load position Pl and an unload position Pu when the ramp load mechanism 16 is in a first position P1. The second support portion 72 is configured to support a lift tab 46a that moves between an unload position Pu and a retracted position Pa when the ramp load mechanism 16 is in a second position P2. The first position P1 is spaced apart from the second position P2 in a first circumferential direction Dc1 about the central axis Axr. The housing 11 has a first contact surface 52a configured to contact the ramp load mechanism 16 in the first circumferential direction Dc1, thereby restricting the ramp load mechanism 16 from rotating in the first circumferential direction Dc1 when it is in the first position P1.

[0126] When the ramp load mechanism 16 is in the second position P2 and the HSA 14 is in the retracted position Pa, the magnetic disk 12 is not covered by either the ramp load mechanism 16 or the HSA 14 and can move axially relative to the housing 11. Therefore, in the HDD 10, the magnetic disk 12 can be attached to and detached from the housing 11 without removing the ramp load mechanism 16 and the HSA 14 from the housing 11. Consequently, the HDD 10 can reduce rework costs.

[0127] The ramp load mechanism 16 comes into contact with the first contact surface 52a by rotating from the second position P2 to the first position P1, for example, after rework. The first contact surface 52a prevents the ramp load mechanism 16 from rotating beyond the first position P1. As a result, the HDD 10 can position the ramp load mechanism 16 to the first position P1 more accurately and easily, thereby reducing assembly and rework costs.

[0128] When the ramp load mechanism 16 is in the first position P1, the first support portion 71 guides the lift tab 46a, which moves between the load position Pl and the unload position Pu. The HDD 10 can more accurately position the ramp load mechanism 16 in the first position P1 using the first contact surface 52a, thereby suppressing unwanted collisions between the slider 48 and the magnetic disk 12 or the ramp load mechanism 16, for example, when moving between the unload position Pu and the load position Pl.

[0129] The housing 11 has an inner circumferential surface 26a. The inner circumferential surface 26a extends around the central axis Axd and faces the outer edge 12b, which is the edge of the magnetic disk 12 in the radial direction. When the ramp load mechanism 16 is in the first position P1, the first support portion 71 is closer to the inner circumferential surface 26a than when the ramp load mechanism 16 is in the second position P2. That is, as the ramp load mechanism 16 rotates from the first position P1 to the second position P2, it moves away from the inner circumferential surface 26a. Therefore, compared to the case where the ramp load mechanism 16 rotates in the opposite direction, the HDD 10 does not need to reduce the inner circumferential surface 26a to provide space for the ramp load mechanism 16 to enter, and the inner circumferential surface 26a that rectifies the airflow generated by the rotating magnetic disk 12 can be made larger.

[0130] The first support portion 71 extends around the central axis Axh when the ramp load mechanism 16 is in the first position P1. The second support portion 72 extends around the central axis Axh when the ramp load mechanism 16 is in the second position P2. That is, the first support portion 71 and the second support portion 72 each extend in a substantially arc shape along the trajectory of the lift tab 46a. Therefore, the magnetic disk 12 can suppress the increase in size of the ramp load mechanism 16 compared to the case where the first support portion 71 and the second support portion 72 spread out in a rectangular shape.

[0131] The ramp load mechanism 16 has a first surface 63a and a second surface 63b. The first surface 63a faces the central axis Axh when the ramp load mechanism 16 is in a first position P1 and is spaced further from the central axis Axh than the lift tab 46a. The second surface 63b faces the central axis Axh when the ramp load mechanism 16 is in a second position P2 and is spaced further from the central axis Axh than the lift tab 46a. The first support portion 71 protrudes from the first surface 63a and is spaced further from the central axis Axh than the slider 48 when the ramp load mechanism 16 is in a first position P1. The second support portion 72 protrudes from the second surface 63b and is spaced further from the central axis Axh than the slider 48 when the ramp load mechanism 16 is in a second position P2. Therefore, the first surface 63a and the first support portion 71 can be prevented from interfering with the lift tab 46a and slider 48 that move between the load position Pl and the unload position Pu. In addition, the second surface 63b and the second support portion 72 can be prevented from interfering with the lift tab 46a and slider 48 that move between the unload position Pu and the retracted position Pa.

[0132] When the ramp load mechanism 16 is in the first position P1, the angle θ2 between the end face 71e of the first support portion 71 facing the central axis Axh and when the ramp load mechanism 16 is in the second position P2, the angle θ2 between the end face 72c of the second support portion 72 facing the central axis Axh is greater than 90° and less than 180°. Therefore, the magnetic disk 12 can suppress the enlargement of the ramp load mechanism 16 compared to, for example, the case where the angle θ2 between the end face 71e of the first support portion 71 and the end face 72c of the second support portion 72 is 180° and the first support portion 71 and the second support portion 72 spread out in a rectangular shape.

[0133] The housing 11 has a second contact surface 53a configured to contact the ramp load mechanism 16 at a second position P2, thereby restricting the ramp load mechanism 16 from rotating in the second circumferential direction Dc2, which is opposite to the first circumferential direction Dc1. For example, an operator can confirm that the ramp load mechanism 16 has reached the second position P2 and moved radially away from the magnetic disk 12 by contacting the second contact surface 53a. Therefore, the HDD 10 can prevent the magnetic disk 12, which is mounted or removed in the axial direction, from interfering with the ramp load mechanism 16 located between the first position P1 and the second position P2.

[0134] The first contact surface 52a has a lower surface roughness than the second contact surface 53a. Therefore, the first contact surface 52a can position the ramp load mechanism 16 more accurately than the second contact surface 53a. By positioning the ramp load mechanism 16 more accurately at the first position P1 using the first contact surface 52a, the HDD 10 can suppress unwanted collisions between the slider 48 and the magnetic disk 12 or the ramp load mechanism 16 during movement between, for example, the unload position Pu and the load position Pl. Furthermore, the second contact surface 53a does not need to be precisely machined, for example by cutting. In other words, the HDD 10 can reduce the cost of machining the second contact surface 53a.

[0135] The housing 11 is provided with a screw hole 56 that engages with a screw 81. The ramp load mechanism 16 is provided with a through hole 65. The through hole 65 is configured to communicate with the screw hole 56 regardless of whether the ramp load mechanism 16 is in the first position P1 or the second position P2. The screw 81 is configured to engage with the screw hole 56 through the through hole 65, regardless of whether the ramp load mechanism 16 is in the first position P1 or the second position P2, thereby fixing the ramp load mechanism 16 to the housing 11. As a result, the HDD 10 can suppress an increase in the number of screw holes 56 provided in the housing 11. In addition, the screw 81 can be loosened without being completely removed from the screw hole 56, allowing the ramp load mechanism 16 to rotate between the first position P1 and the second position P2. Therefore, the HDD 10 can reduce rework costs.

[0136] The stopper 91 contacts the HSA 14 in the unload position Pu, thereby restricting the HSA 14 from rotating from the unload position Pu towards the retracted position Pa. This prevents the HDD 10 from interfering with the ramp load mechanism 16 at the first position P1 as the HSA 14 rotates from the unload position Pu towards the retracted position Pa.

[0137] (Second embodiment) A second embodiment will be described below with reference to Figure 7. In the following description of the embodiments, components having the same function as those already described will be denoted by the same reference numerals as those previously described, and their description may be omitted. Furthermore, multiple components denoted by the same reference numerals do not necessarily share all functions and properties, and may have different functions and properties depending on the embodiment.

[0138] Figure 7 is an exemplary plan view showing a portion of the HDD 10 according to the second embodiment. As shown in Figure 7, the base 21 of the second embodiment has a base 201 instead of a base 51. The base 201 is substantially equivalent to the base 51, except as described below.

[0139] The base 201 is provided with a first screw hole 205 and a second screw hole 206 instead of the screw hole 56. The first screw hole 205 and the second screw hole 206 are spaced apart from each other around the central axis Axr and are also spaced apart from the mounting hole 55. The first screw hole 205 and the second screw hole 206 open into the mounting surface 51a of the base 201 and are provided with female threads.

[0140] The ramp road mechanism 16 of the second embodiment has a mounting portion 211 instead of a mounting portion 61. The mounting portion 211 is substantially equivalent to the mounting portion 61, except as described below. The mounting portion 211 is provided with a first through hole 215 and a second through hole 216 instead of the through hole 65.

[0141] The first through-hole 215 and the second through-hole 216 penetrate the mounting portion 211 in a substantially Z direction and open to the lower surface 61a and upper surface 61b of the mounting portion 211. In this embodiment, the cross-sections of the first through-hole 215 and the second through-hole 216, which are perpendicular to the axial direction, are formed to be substantially circular. The first through-hole 215 and the second through-hole 216 are spaced apart from each other around the central axis Axr.

[0142] When the ramp road mechanism 16 is in the first position P1, the first through hole 215 communicates with the first screw hole 205. The diameter of the first through hole 215 is equal to or greater than the outer diameter of the first screw hole 205.

[0143] When the ramp load mechanism 16 is in the second position P2, the second through hole 216 communicates with the second screw hole 206. The diameter of the second through hole 216 is equal to or greater than the outer diameter of the second screw hole 206.

[0144] When the ramp load mechanism 16 is in the first position P1, the screw 81 engages with the first screw hole 205 through the first through hole 215, fixing the ramp load mechanism 16 to the housing 11. On the other hand, when the ramp load mechanism 16 is in the second position P2, the screw 81 engages with the second screw hole 206 through the second through hole 216, fixing the ramp load mechanism 16 to the housing 11. Alternatively, a jig such as a pin may be used to fix the ramp load mechanism 16 in the second position P2 instead of the screw 81.

[0145] In the HDD 10 of the second embodiment described above, the housing 11 is provided with a first screw hole 205 and a second screw hole 206. The first screw hole 205 is configured to engage with a screw 81. The second screw hole 206 is spaced apart from the first screw hole 205 around the central axis Axr and is configured to engage with a screw 81. The ramp load mechanism 16 is provided with a first through hole 215 and a second through hole 216. The first through hole 215 is configured to communicate with the first screw hole 205 when the ramp load mechanism 16 is in the first position P1. The second through hole 216 is configured to communicate with the second screw hole 206 when the ramp load mechanism 16 is in the second position P2. The screw 81 is configured to engage with the first screw hole 205 through the first through hole 215 when the ramp load mechanism 16 is in the first position P1, and to engage with the second screw hole 206 through the second through hole 216 when the ramp load mechanism 16 is in the second position P2, thereby fixing the ramp load mechanism 16 to the housing 11. As a result, the diameters of the first through hole 215 and the second through hole 216 of the ramp load mechanism 16 can be reduced, and deviation from the first position P1 and the second position P2 can be suppressed.

[0146] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0147] 10...Hard disk drive (HDD), 11...Housing, 12...Magnetic disk, 14...Head stack assembly (HSA), 16...Ramp load mechanism, 46a...Lift tab, 48...Slider, 52a...First contact surface, 53a...Second contact surface, 63a...First surface, 63b...Second surface, 65...Through hole, 71...First support part, 71e...End face, 72...Second support part, 72c...End face, 81...Screw, 91...Stopper, 205...First screw hole, 206...Second screw hole, 215...First through hole, 216...Second through hole.

Claims

1. A magnetic disk rotatable around a first axis of rotation, A ramp rotatable around a second rotation axis between a first position covering the magnetic disk in the axial direction along the first rotation axis and a second position spaced radially away from the magnetic disk perpendicular to the first rotation axis, A head stack assembly comprising a slider rotatable about a third axis of rotation and configured to read and write information to the magnetic disk, and a lift tab spaced further apart from the third axis of rotation than the slider, A housing that houses the magnetic disk, the lamp, and the head stack assembly, It is equipped with, The head stack assembly is movable around the third rotation axis to a load position in which the slider is positioned on the magnetic disk, an unload position in which the head stack assembly covers the magnetic disk in the axial direction and the slider is separated from the magnetic disk, and a retracted position in which the head stack assembly is separated from the magnetic disk in the radial direction. The ramp has a first support portion configured to support the lift tab that moves between the load position and the unload position when the ramp is in the first position, and a second support portion configured to support the lift tab that moves between the unload position and the retracted position when the ramp is in the second position, which is spaced further apart from the first axis of rotation than the first support portion. The first position is spaced apart from the second position in the first circumferential direction about the second axis of rotation, The housing has a first contact portion configured to restrict the lamp from rotating in the first circumferential direction by contacting the lamp at the first position, Disk drive.

2. The housing has an inner circumferential surface that extends around the first rotation axis and faces the edge of the magnetic disk in the radial direction, When the lamp is in the first position, the first support portion is closer to the inner circumferential surface than the first support portion when the lamp is in the second position. The disk device according to claim 1.

3. The first support portion extends around the third rotation axis when the lamp is in the first position. The second support extends around the third rotation axis when the lamp is in the second position. The disk device according to claim 1.

4. The ramp has a first surface that faces the third axis of rotation when the ramp is in the first position and is spaced further from the third axis of rotation than the lift tab, and a second surface that faces the third axis of rotation when the ramp is in the second position and is spaced further from the third axis of rotation than the lift tab. The first support portion protrudes from the first surface and is spaced further from the third rotation axis than the slider when the lamp is in the first position. The second support portion protrudes from the second surface and is spaced further from the third axis of rotation than the slider when the lamp is in the second position. The disk device according to claim 1.

5. The angle between the edge of the first support portion facing the third axis of rotation when the lamp is in the first position and the edge of the second support portion facing the third axis of rotation when the lamp is in the second position is greater than 90° and less than 180°. The disk device according to claim 1.

6. The housing has a second contact portion configured to contact the lamp at the second position, thereby restricting the lamp from rotating in a second circumferential direction opposite to the first circumferential direction. The disk device according to claim 1.

7. The first contact portion has a smaller surface roughness than the second contact portion. The disk device according to claim 6.

8. screw, Furthermore, it is equipped with, The housing is provided with a screw hole that engages with the screw, The lamp is provided with a through hole configured to communicate with the screw hole regardless of whether the lamp is in the first position or the second position. The screw is configured to engage with the screw hole through the through hole, regardless of whether the lamp is in the first or second position, and to fix the lamp to the housing. The disk device according to claim 1.

9. screw, Furthermore, it is equipped with, The housing is provided with a first screw hole configured to engage with the screw, and a second screw hole located spaced apart from the first screw hole around the second rotation axis and configured to engage with the screw. The lamp is provided with a first through-hole configured to communicate with the first screw hole when the lamp is in the first position, and a second through-hole configured to communicate with the second screw hole when the lamp is in the second position. The screw is configured to engage with the first screw hole through the first through hole when the lamp is in the first position, and to engage with the second screw hole through the second through hole when the lamp is in the second position, thereby fixing the lamp to the housing. The disk device according to claim 1.

10. A stopper that contacts the head stack assembly in the unload position to restrict the head stack assembly from rotating from the unload position to the retracted position. A disk device according to claim 1, further comprising:

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