US20210151073A1 - Suspension for disk device having a damper member for suppressing wobble of a flexure - Google Patents
Suspension for disk device having a damper member for suppressing wobble of a flexure Download PDFInfo
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- US20210151073A1 US20210151073A1 US17/073,500 US202017073500A US2021151073A1 US 20210151073 A1 US20210151073 A1 US 20210151073A1 US 202017073500 A US202017073500 A US 202017073500A US 2021151073 A1 US2021151073 A1 US 2021151073A1
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- Prior art keywords
- opening
- suspension
- branch portion
- arm
- branch
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4833—Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
- G11B33/022—Cases
- G11B33/025—Portable cases
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
- G11B33/08—Insulation or absorption of undesired vibrations or sounds
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4826—Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5582—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock
Definitions
- the present invention relates to a suspension for a disk device used for a hard disk drive or the like.
- Hard disk drives are used for data processing devices such as personal computers and the like.
- Hard disk drives comprise a magnetic disk rotating around a spindle, a carriage pivoting on a pivot shaft, and the like.
- the carriage includes an actuator arm and pivots in a track width direction of the disk on the pivot shaft by a positioning motor such as a voice coil motor.
- a disk-drive suspension (to be referred to merely as a suspension hereinafter) is attached to the actuator arm.
- the suspension includes a load beam, a flexure disposed to be overlaid on the load beam, and the like.
- a gimbal portion is formed near a distal end of the flexure, and a slider constituting the magnetic head is provided in the gimbal portion.
- the slider is provided with an element (transducer) for accessing the disc (e.g., to read or write data, and the like).
- the load beam, flexure, slider and the like constitute a head gimbal assembly.
- the gimbal portion includes a tongue on which the slider is mounted, and a pair of outriggers formed on respective sides of the tongue.
- the outriggers are each shaped so as to stretch outwards from respective sides of the flexure. Vicinities of both longitudinal ends of each outrigger are fixed to the load beam by, for example, laser welding or the like.
- Each outrigger can flex in a thickness direction like a spring and plays an important role in securing gimbal movement of the tongue.
- a damper member should be provided in the outrigger itself. More specifically, a damper member is attached to the outrigger and thus the outrigger and the damper member can move together as one body. However, if a damper member is attached to an outrigger, the wobbling of the flexure can be suppressed, but on the other hand, the rigidity of the flexure is increased, which is problematic.
- a flexure having a damper member extending along a longitudinal direction of the outrigger is not preferable for the gimbal movement because such a flexure exhibits higher rigidities along a pitch direction and also a roll direction as compared to a flexure without a damper member.
- One of the objects of the present invention is to provide a suspension for disk device, which can effectively suppress the wobbling of the flexure and can also prevent an increase in the rigidity of the flexure.
- a suspension for a disk device comprises a load beam, a flexure and first and second damper members.
- the load beam comprises a first surface, a second surface on an opposite side to the first surface, a first opening and a second opening, which penetrate from the first surface through to the second surface.
- the flexure comprises a tongue disposed along the first surface, on which a slider is mounted, a first outrigger and a second outrigger disposed on respective outer sides of the tongue along a width direction thereof. The first damper member and the second damper member are attached to the second surface.
- the first outrigger comprises a first arm disposed on a first surface side, and a first branch portion extending from the first arm through the first opening, a distal end of which is interposed between the second surface and the first damper member.
- the second outrigger comprises a second arm disposed on the first surface side, and a second branch portion extending from the second arm through the second opening, a distal end of which is interposed between the second surface and the second damper member.
- the first damper member may at least partially close the first opening and be attached on the second surface in a periphery of the first opening.
- the second damper member may at least partially close the second opening and be attached on the second surface in a periphery of the second opening.
- the first arm may comprise a first bent portion overlapping the first opening
- the second arm may comprise a second bent portion overlapping the second opening.
- the first branch portion may extend from the first bent portion
- the second branch portion may extend from the second bent portion.
- the first branch portion and the second branch portion may extend in a direction crossing both a longitudinal direction and a width direction of the load beam.
- the first branch portion and the second branch portion may extend parallel to a longitudinal direction of the load beam.
- the first outrigger may comprise a pair of first branch portions each identical to the first branch portion, which extend from the first arm in directions different from each other, and the second outrigger may comprise a pair of second branch portions each identical to the second branch portion, which extend from the second arm in directions different from each other.
- the first opening may comprise an inner wall including a first protrusion projecting towards the first branch portion put through the first opening
- the second opening may comprise an inner wall including a second protrusion projecting towards the second branch portion put through the second opening.
- the first arm may comprise a first arm opening at least partially overlapping the first opening
- the second arm may comprise a second arm opening at least partially overlapping the second opening.
- the first branch portion may extend inwards in the first arm opening
- the second branch portion may extend inwards in the second arm opening.
- the suspension may further comprise a first insulating layer disposed between the distal end of the first branch portion and the second surface and a second insulating layer disposed between the distal end of the second branch portion and the second surface.
- the wobbling of the flexure which includes the tongue and the pair of outriggers can be effectively suppressed. Further, it is possible to suppress the increase in the rigidity of the flexure, thereby making it possible to avoid adverse effect caused on the gimbal movement.
- FIG. 1 is a perspective diagram schematically showing an example of a disk device.
- FIG. 2 is a schematic cross section of the disk device shown in FIG. 1 .
- FIG. 3 is a perspective diagram schematically showing a suspension for the disk device of the first embodiment.
- FIG. 4 is a perspective diagram schematically showing the suspension shown in FIG. 3 as viewed from a slider side.
- FIG. 5 is a schematic plan view of the suspension shown in FIG. 4 .
- FIG. 6 is a schematic cross section of the suspension taken along line F 6 -F 6 in FIG. 5 .
- FIG. 7 is a plan view schematically showing structures of a first damping portion and a second damping portion of the suspension of the first embodiment.
- FIG. 8 is a schematic cross section of the first damping portion taken along line F 8 -F 8 in FIG. 7 .
- FIG. 9 is a plan view schematically showing a suspension of a comparative example.
- FIG. 10 is a diagram illustrating the rigidity of the flexure in each of a suspension with a damper member and a suspension without a damper member.
- FIG. 11 is a plan view schematically showing a suspension of the second embodiment.
- FIG. 12 is a schematic cross section of a first damping portion taken along line F 12 -F 12 in FIG. 11 .
- FIG. 13 is a plan view schematically showing a suspension of the third embodiment.
- FIG. 14 is a schematic cross section of a first damping portion, taken along line F 14 -F 14 in FIG. 13 .
- FIG. 15 is a plan view schematically showing a suspension of the fourth embodiment.
- FIG. 16 is a schematic cross section of a first damping portion taken along line F 16 -F 16 in FIG. 15 .
- FIG. 17 is a plan view schematically showing a suspension of the fifth embodiment.
- FIG. 18 is a schematic cross section of a first damping portion taken along line F 18 -F 18 in FIG. 17 .
- FIG. 19 is a plan view schematically showing a suspension of the sixth embodiment.
- FIG. 20 is a schematic cross section of a first damping portion taken along line F 20 -F 20 in FIG. 19 .
- FIG. 1 is a perspective view schematically showing an example of a disk device (HDD) 1 .
- the disk device 1 comprises a case 2 , a plurality of disks 4 rotating around a spindle 3 , a carriage 6 pivotable around a pivot shaft 5 , a positioning motor (voice coil motor) 7 for driving the carriage 6 .
- the case 2 is air-tightly sealed by a lid (not shown).
- FIG. 2 is a schematic cross section of a part of the disk device 1 .
- a plurality of arms (carriage arms) 8 are provided in the carriage 6 .
- Suspensions 10 are respectively attached to distal end portions of the arms 8 .
- Sliders 11 are respectively provided in distal end portions of the suspensions 10 .
- FIG. 3 is a perspective view schematically showing a suspension 10 of this embodiment.
- Each suspension 10 comprises a base plate 20 fixed to the respective arm 8 (shown in FIGS. 1 and 2 ) of the carriage 6 , a load beam 21 and a flexure 22 .
- the base plate 20 comprises a boss portion 20 a to be inserted to a hole 8 a (shown in FIG. 2 ) formed in the respective arm 8 .
- a flexure 22 is disposed along the load beam 21 .
- the load beam 21 and the flexure 22 both extend in a longitudinal direction X of the respective suspension 10 .
- a direction normal to the longitudinal direction X is referred to as a width direction Y of the suspension 10 , the load beam 21 , the flexure 22 and the like.
- a swaying direction S is defined as indicated by an arc-like arrow illustrated near a distal part of the load beam 21 .
- the load beam 21 includes a first surface 21 a (shown in the FIG. 4 ) and a second surface 21 b on an opposite side to the first surface 21 a .
- the first surface 21 a is a surface on a side where the flexure 22 is disposed.
- a damper member 25 may be provided in the second surface 21 b.
- FIG. 4 is a perspective diagram schematically showing a part of the distal end side of the suspension 10 as viewed from a slider 11 side.
- an element 28 is provided such as an MR element, which can convert a magnetic signal and an electric signal into each other.
- the element 28 accesses the respective disk 4 so as to write data thereto or read data therefrom, and the like.
- the slider 11 , the load beam 21 and the flexure 22 and the like constitute a head gimbal assembly.
- the flexure 22 includes a metal base 40 made from a thin stainless steel plate and a wiring portion 41 disposed along the metal base 40 .
- the thickness of the metal base 40 is less than the thickness of the load beam 21 .
- the thickness of the metal base 40 should preferably be 12 to 25 ⁇ m, and for example, 20 ⁇ m.
- the thickness of the load beam 21 is, for example, 30 ⁇ m.
- a part of the wiring portion 41 is electrically connected to the element 28 of the slider 11 via a terminal 41 a for the slider 11 .
- FIG. 5 is a plan view schematically showing the vicinity of the distal end portion of the suspension 10 as viewed from the slider 11 side.
- the flexure 22 includes a tongue 45 , a first outrigger 51 and a second outrigger 52 .
- the slider 11 is mounted on the tongue 45 .
- the first outrigger 51 and the second outrigger 52 are disposed in respective sides of the tongue 45 along a width direction Y1.
- the width direction Y1 coincides with the width direction Y.
- the first outrigger 51 and the second outrigger 52 are shaped to protrude on respective sides of the tongue 45 along the width direction Y1 thereof. All of the tongue 45 , the first outrigger 51 and the second outrigger 52 are parts of the metal base 40 , and the outline of each of these is formed by, for example, etching.
- FIG. 6 is a schematic cross section of a suspension 10 taken along line F 6 -F 6 in FIG. 5 .
- a dimple 55 which projects towards the tongue 45 is formed near the distal end of the load beam 21 .
- a distal end 55 a of the dimple 55 is in contact with the tongue 45 .
- the tongue 45 swings around the distal end 55 a of the dimple 55 and thus can create a desired gimbal movement.
- the tongue 45 , the first outrigger 51 , the second outrigger 52 , the dimple 55 and the like constitute a gimbal portion 56 .
- the first outrigger 51 is disposed on an outer side of a side portion of the tongue 45 , so as to extend along the longitudinal direction X of the flexure 22 .
- the second outrigger 52 is disposed on an outer side of the other side portion of the tongue 45 so as to extend along the longitudinal direction X of the flexure 22 .
- the first outrigger 51 includes a first proximal end portion 51 a , a first proximal end-side arm 51 b , a first distal end-side arm 51 c and a first joint portion 51 d .
- the first proximal end portion 51 a is fixed to the load beam 21 with a fixing portion 61 .
- the first proximal end-side arm 51 b extends spreads from the first proximal end portion 51 a towards the distal end of the flexure 22 .
- An end of the first distal end-side arm 51 c is connected to the first proximal end-side arm 51 b , and the other end is connected to the distal end portion 22 a of the flexure 22 .
- the first joint portion 51 d connects the distal end of the first proximal end-side arm 51 b and one of the side portions of the tongue 45 .
- the distal end portion 22 a is fixed to the vicinity of the distal end of the load beam 21 with a fixing portion 62 .
- the fixing portions 61 , 62 are formed by, for example, laser spot welding or the like.
- the second outrigger 52 has a shape similar to that of the first outrigger 51 .
- the second outrigger 52 includes a second proximal end portion 52 a , a second proximal end-side arm 52 b , a second distal end-side arm 52 c and a second joint portion 52 d .
- the second distal end portion 52 a is fixed to the load beam 21 with a fixing portion 63 , which is formed by, for example, laser spot welding or the like.
- both end portions of the first outrigger 51 along the longitudinal direction X are supported with the fixing portions 61 and 62 , respectively. Further, both end portions of the second outrigger 52 along the longitudinal direction X are supported with the fixing portions 62 and 63 , respectively.
- a portion located between the fixing portions 61 and 62 of the first outrigger 51 and a portion located between the fixing portions 62 and 63 of the second outrigger 52 can flex in the thickness direction of the metal base 40 .
- the tongue 45 is supported elastically by the first outrigger 51 and the second outrigger 52 , so as to be swung around the dimple 55 as a supporting point.
- a first micro-actuator element 65 and a second micro-actuator element 66 are mounted on the gimbal portion 56 .
- the micro-actuator elements 65 and 66 are each formed from a piezoelectric material and are placed on respective sides of the slider 11 . Both end portions 65 a and 65 b of the first micro-actuator element 65 are fixed to actuator support members 70 and 71 of the tongue 45 , respectively. Both end portions 66 a and 66 b of the second micro-actuator element 66 are fixed to actuator support members 72 and 73 of the tongue 45 , respectively.
- the micro-actuator elements 65 and 66 each have a function of pivoting the tongue 45 along the swaying direction S (see FIG. 3 ).
- a limiter member 75 which inhibits excessive wobbling of the tongue 45 , is provided between one side portion of the tongue 45 and the first outrigger 51 .
- Another limiter member 76 is also provided between the other side portion of the tongue 45 and the second outrigger 52 .
- the suspension 10 of this embodiment comprises a first damping portion 80 and a second damping portion 90 , configured to suppress vibration of the flexure 22 .
- the first damping portion 80 is provided in the vicinity of the first proximal end portion 51 a of the first outrigger 51
- the second damping portion 90 is provided in the vicinity of the second proximal end portion 52 a of the second outrigger 52 .
- FIG. 7 is a plan view schematically illustrating the structure of the suspension 10 in the vicinities of the first damping portion 80 and the second damping portion 90 .
- FIG. 8 is a schematic cross section of the first damping portion 80 taken along line F 8 -F 8 in FIG. 7 .
- the load beam 21 comprises a first opening 81 in the vicinity of the first proximal end portion 51 a .
- a part of the first proximal end-side arm 51 b overlaps the first opening 81 .
- the first proximal end-side arm 51 b comprises a first bent portion 51 e in a position which overlaps the first opening 81 .
- the first proximal end-side arm 51 b extends in a direction approaching the center C along the width direction Y of the suspension 10 .
- the first proximal end-side arm 51 b extends in a direction away from the center C (see FIG. 5 ).
- the first proximal end-side arm 51 b comprises a first branch portion 51 f in the vicinity of the first bent portion 51 e .
- the first branch portion 51 f is inserted through the first opening 81 .
- the first opening 81 is closed with a first damper member 82 attached to a second surface 21 b of the load beam 21 .
- the first damper member 82 may only partially close the first opening 81 .
- the first damping portion 80 is constituted by the first opening 81 , the first damper member 82 and the first branch portion 51 f.
- the first branch portion 51 f extends towards the center C along an extending direction D which crosses both the longitudinal direction X and the width direction Y.
- the first opening 81 comprises an inner wall 81 a which extends along a direction which crosses each of the longitudinal direction X, the width direction Y and the extending direction D.
- the first branch portion 51 f overlaps the inner wall 81 a.
- the load beam 21 comprises a second opening 91 in the vicinity of the second proximal end portion 52 a .
- the second opening 91 is closed by a second damper member 92 attached to the second surface 21 b of the load beam 21 .
- the second damper member 92 may only partially close the second opening 91 .
- the second proximal end-side arm 52 b includes a second bent portion 52 e and a second branch portion 52 f .
- the second branch portion 52 f is inserted through the second opening 91 .
- the second damping portion 90 is constituted by the second opening 91 , the second damper member 92 and the second branch portion 52 f.
- the second proximal end-side arm 52 b , the second opening 91 and the second damper member 92 each have a line-symmetrical shape to that of the first proximal end-side arm 51 b , the first opening 81 and the first damper member 82 with respect to the center C.
- the first proximal end-side arm 51 b (the first bent portion 51 e ) is parallel to the first surface 21 a of the load beam 21 .
- the first branch portion 51 f includes a ramp portion 511 inclined to the first proximal end-side arm 51 b and a flat portion 512 parallel to the second surface 21 b of the load beam 21 .
- the ramp portion 511 is inserted through the first opening 81 in the vicinity of the inner wall 81 a .
- the flat portion 512 is in contact with the second surface 21 b.
- the first damper member 82 comprises a viscoelastic material layer 83 and a constrained plate 84 .
- the viscoelastic material layer 83 is formed of a high polymer material (for example, acrylic resin) which can exhibit viscous resistance when deformed, and is adhesive.
- the thickness of the viscoelastic material layer 83 is, for example, 51 ⁇ m.
- the constrained plate 84 is formed of a synthetic resin such as polyester, and is laminated on the viscoelastic material layer 83 .
- the thickness of the constrained plate 84 is, for example, 51 ⁇ m.
- the first damper member 82 is attached to the second surface 21 b with the viscoelastic material layer 83 , in the surroundings of the first opening 81 .
- the distal end of the first branch portion 51 f that is, the flat portion 512 , is interposed between the second surface 21 b and the first damper member 82 .
- the viscoelastic material layer 83 is attached to a lower portion of the surface of the flat portion 512 , as shown in FIG. 8 , and an upper surface of the surface of the flat portion 512 , as shown in FIG. 8 , is pushed to the second surface 21 b.
- the cross-sectional structure of the second damping portion 90 is similar to the cross-sectional structure of the first damping portion 80 shown in FIG. 8 . That is, the second damper member 92 comprises a viscoelastic material layer and a constrained plate, and the second branch portion 52 f includes a ramp portion and a flat portion interposed between the second surface 21 b and the second damper member 92 .
- the first opening 81 has such a shape that the inner wall 81 a protrudes inwards in the first opening 81 .
- the second opening 91 has such a shape that the inner wall 91 a opposing the second branch portion 52 f protrudes inwards in the second opening 91 .
- Such shapes of the openings 81 and 91 are effective when attaching the flexure 22 to the load beam 21 in the production of the suspension 10 . More specifically, here, the first branch portion 51 f is inserted to a wide region located below the inner wall 81 in FIG.
- each of the branch portions 51 f and 52 f can be positioned at the locations indicated in FIG. 7 .
- the suspension 10 of this embodiment comprises the damping portions 80 and 90 in the vicinities (proximal end portions) of the proximal end portions 51 a and 52 a of the pair of outriggers 51 and 52 , respectively.
- energy which can vibrate the flexure 22 is applied from outside, the viscoelastic material layers 83 of the damper members 82 and 92 of the respective damping portions 80 and 90 deform, thus producing internal resistance due to friction of the molecules constituting the viscoelastic material layers 83 . Therefore, the vibration energy is converted into thermal energy, thus making it possible to suppress the wobbling of the flexure 22 .
- FIG. 9 is a plan view schematically showing a suspension 200 of the comparative example.
- the suspension 200 comprises a flexure 210 including a first outrigger 211 and a second outrigger 212 , and a gimbal portion 220 .
- first damper member 213 is provided in the first outrigger 211
- second damper member 214 is provided in the second outrigger 212 .
- the damper members 213 and 214 are adhered only to the outriggers 211 and 212 , respectively, and extend in the longitudinal directions of the outriggers 211 and 212 , respectively.
- the wobbling of the gimbal portion 220 can be suppressed.
- the rigidity of the flexure is increased in comparison with a suspension without damper members 213 and 214 .
- FIG. 10 is a graph showing the rigidity of the flexure regarding each of the suspension 200 with the damper members 213 and 214 as shown in FIG. 9 and a suspension without damper members.
- reference symbols E and F respectively show the rigidities of the suspension 200 along the pitch direction and the roll direction in the comparative example shown in FIG. 9 .
- reference symbols G and H respectively show the rigidities of the suspension without the damper member 213 and 214 along the pitch direction and the roll direction.
- the rigidities E and F of the flexure in the suspension 200 with the damper members 213 and 214 are both increased by approximately 13% as compared to the case without the damper members 213 and 214 . If the rigidity increases to this extent, an adverse effect may be created in the gimbal movement of the suspension 200 .
- the branch portions 51 f and 52 f of the outriggers 51 and 52 are bent to a second surface 21 b side of the load beam 21 via the openings 81 and 91 , and are fixed to the load beam 21 by the damper members 82 and 92 .
- the proximal end-side arms 51 b and 52 b located on a first surface 21 a side of the load beam 21 and the distal end-side arms 51 c and 52 c are not directly constrained by the damper members 82 and 92 ; therefore, influence on the rigidity of the outriggers 51 and 52 , which may be caused by the damper members 82 and 92 , can be suppressed.
- branch portions 51 f and 52 f bent to the second surface 21 b side are parts branched off from the proximal end-side arms 51 b and 52 b , and therefore an influence on the function of the outriggers 51 and 52 , which may be caused by the bending, can be also suppressed.
- the branch portions 51 f and 52 f are interposed between the load beam 21 and the damper members 82 and 92 .
- the branch portions 51 f and 52 f are held well.
- the effect of damping the vibration can be further stabilized.
- the damper members 213 and 214 greatly extend in the longitudinal directions of the outriggers 211 and 212 , respectively.
- the damper members 213 and 214 oppose a surface of the load beam, on the side where the flexure 210 is disposed (that is, a surface corresponding to the first surface 21 a in the embodiment).
- the shipping comb may interfere with the damper member 213 and 214 to cause damage to the damper members 213 and 214 .
- the damper members 82 and 92 are provided on the second surface 21 b of the load beam 21 . With this configuration, the interference between the shipping comb and the damper members 82 and 92 can be suppressed.
- damping portions 80 and 90 disclosed in this embodiment is only an example.
- a structure similar to that the first embodiment can be applied.
- FIG. 11 is a plan view schematically showing a part of a suspension 10 of the second embodiment.
- a first proximal end-side arm 51 b of a first outrigger 51 comprises a pair of branch portions 51 f ( 51 f 1 and 51 f 2 ) which extend out from a first bent portion 51 e in directions different from (opposite to) each other.
- first branch portions 51 f 1 and 51 f 2 extend to respective sides along the width direction Y. That is, the extending direction D of the first branch portions 51 f 1 and 51 f 2 is parallel to the width direction Y.
- a first opening 81 comprises a pair of inner walls 81 a and 81 b parallel to the longitudinal direction X.
- the first branch portion 51 f 1 overlaps the inner wall 81 a
- the first branch portion 51 f 2 overlaps the inner wall 81 b .
- the first opening 81 has a shape that the inner walls 81 a and 81 b protrude inwards in the first opening 81 .
- the first branch portions 51 f 1 and 51 f 2 are inserted to a wide region of the inner walls 81 a and 81 b shown in a lower portion of the figure and the flexure 22 is slid to an upper portion in the figure.
- the first branch portions 51 f 1 and 51 f 2 can be positioned at locations shown in FIG. 11 , respectively.
- FIG. 12 is a schematic cross section of a first damping portion 80 taken along line F 12 -F 12 in FIG. 11 .
- the first branch portions 51 f 1 and 51 f 2 each comprise a ramp portion 511 and a flat portion 512 .
- the flat portions 512 of the first branch portion 51 f 1 and 51 f 2 each are interposed between the second surface 21 b and the first damper member 82 .
- a viscoelastic material layer 83 is attached to a lower surface of each flat portion 512 , as shown in FIG. 12 , and an upper surface of each flat portion 512 , as shown in FIG. 12 , is pushed against the second surface 21 b.
- the second proximal end-side arm 52 b of the second outrigger 52 , the second opening 91 and the second damper member 92 have a line-symmetrical shape with respect to the first proximal end-side arm 51 b , the first opening 81 and the first damper member 82 with respect to the center C. That is, the second proximal end-side arm 52 b includes a pair of second branch portions 52 f ( 52 f 1 and 52 f 2 ) extending in directions different from each other, and the second opening 91 comprises a pair of inner walls 91 a and 91 b .
- the second branch portion 52 f 1 overlaps the inner wall 91 a and the second branch portion 52 f 2 overlaps the inner wall 91 b.
- the cross-sectional structure of the second damping portion 90 is similar to the cross-sectional structure of the first damping portion 80 shown in FIG. 11 . That is, the second branch portions 52 f 1 and 52 f 2 each comprise a ramp portion and a flat portion, and each flat portion is interposed between the second surface 21 b and the second damper member 92 .
- the outriggers 51 and 52 each include a pair of branch portions 51 f and 52 f , the outriggers 51 and 52 can be fixed in a well balanced manner in the respective sides along the width direction Y. Further, as compared to the case of the first embodiment, where the outriggers 51 and 52 are fixed to the branch portions 51 f and 52 f , respectively, one by one, a strong damping force (attenuating force) can be obtained.
- FIG. 13 is a plan view schematically showing a part of a suspension 10 of the third embodiment.
- the suspension 10 differs from that of the example of FIG. 11 in the shapes of the first opening 81 and the second opening 91 .
- the first opening 81 comprises a pair of first projecting portions 81 c and 81 d .
- the first projecting portion 81 c projects from an inner wall 81 a in a position overlapping a first branch portion 51 f 1 .
- the first projecting portion 81 d projects from an inner wall 81 b in a position overlapping a first branch portion 51 f 2 .
- the second opening 91 comprises a pair of second projecting portions 91 c and 91 d .
- the second projecting portion 91 c projects from an inner wall 91 a in a position overlapping a second branch portion 52 f 1 .
- the second projecting portion 91 d projects from an inner wall 91 b in a position overlapping a second branch portion 52 f 2 .
- the projecting portions 81 c , 81 d , 91 c and 91 d are each arcuate.
- the projecting portions 81 c , 81 d , 91 c and 91 d hardly interfere with branch portions 51 f 1 , 51 f 2 , 52 f 1 and 52 f 2 .
- the shape of each of the projecting portions 81 c , 81 d , 91 c and 91 d is not limited to arcuate, but may be some other shape such as rectangular or the like.
- FIG. 14 is a schematic cross section of the first damping portion 80 taken along line F 14 -F 14 in FIG. 13 .
- the first projecting portion 81 c extends towards a ramp portion 511 of the first branch portion 51 f 1 .
- the first projecting portion 81 d extends towards a ramp portion 511 of the first branch portion 51 f 2 .
- the cross-sectional structure of the second damping portion 90 is also similar to the cross-sectional structure of the first damping portion 80 shown in FIG. 14 . That is, with the second projecting portions 91 c and 91 d thus provided, the areas of the flat portions of the second branch portions 52 f 1 and 52 f 2 , interposed between the second surface 21 b and the second damper member 92 are increased.
- FIG. 15 is a plan view schematically showing a part of a suspension 10 of the fourth embodiment.
- a first proximal end-side arm 51 b of the first outrigger 51 comprises a first branch portion 51 f
- a second proximal end-side arm 52 b of the second outrigger 52 also comprises a second branch portion 52 f.
- the extending direction D of the first branch portion 51 f is parallel to the longitudinal direction X.
- An inner wall 81 a of a first opening 81 which overlaps the first branch portion 51 f , extends in a direction crossing the extending direction D, that is, for example, parallel to the width direction Y.
- FIG. 16 is a schematic cross section of a first damping portion 80 taken along line F 16 -F 16 in FIG. 15 .
- the first branch portion 51 f comprises a ramp portion 511 and a flat portion 512
- the flat portion 512 is interposed between a second surface 21 b and a first damper member 82 .
- the second proximal end-side arm 52 b of the second outrigger 52 , the second opening 91 and the second damper member 92 has a line-symmetrical shape to the first proximal end-side arm 51 b , the first opening 81 and the first damper member 82 with respect to the center C.
- the cross-sectional structure of the second damping portion 90 is similar to the cross-sectional structure of the first damping portion 80 shown in FIG. 16 .
- the openings 81 and 91 do not comprise an inward protruding portion, unlike in the other embodiments. Even with such a configuration, the flexure 22 can be easily attached to the load beam 21 .
- the branch portions 51 f and 52 f are inserted to the openings 81 and 91 , respectively, and the flexure 22 is slid upwards as viewed in FIG. 15 . In this manner, the branch portions 51 f and 52 f can be positioned to the respective locations shown in FIG. 15 .
- the openings 81 and 91 need not include a wide region to insert the branch portions 51 f and 52 f , unlike in the other embodiments described above. Therefore, the openings 81 and 91 can be downsized, and therefore the rigidity of the load beam 21 can be improved.
- FIG. 17 is a plan view schematically showing a part of a suspension 10 of the fifth embodiment.
- a first proximal end-side arm 51 b of the first outrigger 51 comprises a first arm opening 51 g .
- the first arm opening 51 g at least partially overlap the first opening 81 .
- the first branch portion 51 f is disposed inside the first arm opening 51 g . It is preferable that the position of the first branch portion 51 f placed in the first arm opening 51 g be the center of the first proximal end-side arm 51 b along the width direction.
- the extending direction D of the first branch portion 51 f is inclined to both of the longitudinal direction X and the width direction Y.
- the inner wall 81 a of the first opening 81 which overlaps the first branch portion 51 f extends in a direction crossing each of the extending direction D, the longitudinal direction X and the width direction Y.
- the first arm opening 51 g has a shape elongated along the extending direction D.
- FIG. 18 is a schematic cross section of the first damping portion 80 taken along line F 18 -F 18 in FIG. 17 .
- the first branch portion 51 f comprises a ramp portion 511 and a flat portion 512 as in the case of the first embodiment.
- the flat portion 512 is interposed between second surface 21 b and the first damper member 82 . Note that the circumferential portion of the first arm opening 51 g is not bent, but parallel to the first surface 21 a.
- the second proximal end-side arm 52 b of the second outrigger 52 , the second opening 91 and the second damper member 92 has a line-symmetrical shape to the first proximal end-side arm 51 b , the first opening 81 and the first damper member 82 with respect to the center C. That is, the second proximal end-side arm 52 b comprises a second arm opening 52 g , and the second branch portion 52 f is disposed inside the second arm opening 52 g . Further, the cross-sectional structure of the second damping portion 90 is similar to the cross-sectional structure of the first damping portion 80 shown in FIG. 18 .
- the first proximal end-side arm 51 b can be fixed in a well balanced manner near the center along the width direction thereof.
- the second branch portion 52 f is provided inside the second arm opening 52 g
- the second proximal end-side arm 52 b can be fixed in a well balanced manner near the center along the width direction thereof.
- the openings 81 and 91 need not include a wide region to insert the branch portions 51 f and 52 f , respectively, as in the case of the fourth embodiment.
- the openings 81 and 91 can be downsized and the rigidity of the load beam 21 can be improved.
- FIG. 19 is a plan view schematically showing a part of a suspension 10 of the sixth embodiment.
- the basic structure of the suspension 10 is similar to that of the example shown in FIG. 11 .
- the suspension 10 shown in FIG. 19 differs from that of the example of FIG. 11 in that the first damping portion 80 comprises a pair of first insulating layers 85 and the second damping portion 90 comprises a pair of second insulating layers 95 .
- the pair of first insulating layers 85 overlap the first branch portions 51 f 1 and 51 f 2 , respectively.
- the pair of second insulating layers 95 overlap the second branch portions 52 f 1 and 52 f 2 , respectively.
- FIG. 20 is a schematic cross section of the first damping portion 80 taken along line F 20 -F 20 in FIG. 19 .
- the first insulating layer 85 is formed on an upper surface (a surface opposing the second surface 21 b ) of each of the flat portions 512 of the first branch portions 51 f 1 and 51 f 2 .
- the first insulating layer 85 does not reach the ramp portions 511 of the first branch portions 51 f 1 and 51 f 2 .
- the first insulating layer 85 is interposed between the respective flat portion 512 and the respective second surface 21 b of the load beam 21 . That is, in this embodiment, the flat portions 512 are not in contact with the respective second surfaces 21 b . In the example shown in FIG. 20 , the thickness of the first insulating layers 85 is less than the thickness of the load beam 21 or the flat portion 512 .
- the first insulating layer 85 can be formed by, for example, applying polyimide onto the flat portions 512 , followed by hardening, but the forming method is not limited to this example.
- the cross-sectional structure of the second damping portion 90 is also similar to the cross-sectional structure of the first damping portion 80 shown in FIG. 20 . That is, the second insulating layers 95 are formed on the flat portions of the second branch portions 52 f 1 and 52 f 2 , respectively, and they are located between the flat portions and the second surfaces 21 b , respectively.
- the load beam 21 and the flexure 22 are all formed of a metallic material such as stainless steel or the like.
- the insulating layers 85 and 95 are respectively disposed between the branch portions 51 f 1 , 51 f 2 , 52 f 1 and 52 f 2 and the second surfaces 21 b , the occurrence of abrasion and contamination, which may result when metal members rub against each other, can be suppressed.
- the insulating layers 85 and 95 are formed so as not to reach the ramp portions of the branch portions 51 f 1 , 51 f 2 , 52 f 1 and 52 f 2 , the bending process of the branch portions are not interfered with by the insulating layers 85 and 95 .
Abstract
A suspension for a disk device includes a load beam, a flexure and first and second damper members. The load beam includes a first surface, a second surface and first and second openings. The flexure includes first and second outriggers. The first outrigger includes a first branch portion through the first opening, a distal end thereof being interposed between the second surface and the first damper member. The second outrigger includes a second branch portion through the second opening, a distal end thereof being interposed between the second surface and the second damper member.
Description
- This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2019-206378, filed Nov. 14, 2019, the entire contents of which are incorporated herein by reference.
- The present invention relates to a suspension for a disk device used for a hard disk drive or the like.
- Hard disk drives (HDD) are used for data processing devices such as personal computers and the like. Hard disk drives comprise a magnetic disk rotating around a spindle, a carriage pivoting on a pivot shaft, and the like. The carriage includes an actuator arm and pivots in a track width direction of the disk on the pivot shaft by a positioning motor such as a voice coil motor.
- A disk-drive suspension (to be referred to merely as a suspension hereinafter) is attached to the actuator arm. The suspension includes a load beam, a flexure disposed to be overlaid on the load beam, and the like. A gimbal portion is formed near a distal end of the flexure, and a slider constituting the magnetic head is provided in the gimbal portion. The slider is provided with an element (transducer) for accessing the disc (e.g., to read or write data, and the like). The load beam, flexure, slider and the like constitute a head gimbal assembly.
- The gimbal portion includes a tongue on which the slider is mounted, and a pair of outriggers formed on respective sides of the tongue. The outriggers are each shaped so as to stretch outwards from respective sides of the flexure. Vicinities of both longitudinal ends of each outrigger are fixed to the load beam by, for example, laser welding or the like. Each outrigger can flex in a thickness direction like a spring and plays an important role in securing gimbal movement of the tongue.
- In order to provide for a higher recording density of the disk, it is necessary to further downsize the head gimbal assembly and also to become able to position a slider to a recording surface of the disk with high precision. Accordingly, it is necessary to suppress wobbling of the flexure as much as possible while securing the gimbal movement required of the head gimbal assembly. As described in, for example, U.S. Pat. No. 6,967,821 B and JP 2010-86630 A, it is also known that a damper member is provided in a part of the suspension for suppressing the wobbling of the flexure.
- For suppressing the wobbling of a flexure, which may occur when a vibration is applied, it is effective to suppress wobbling of the outrigger in some cases. For this reason, it was also conceived that a damper member should be provided in the outrigger itself. More specifically, a damper member is attached to the outrigger and thus the outrigger and the damper member can move together as one body. However, if a damper member is attached to an outrigger, the wobbling of the flexure can be suppressed, but on the other hand, the rigidity of the flexure is increased, which is problematic. For example, a flexure having a damper member extending along a longitudinal direction of the outrigger is not preferable for the gimbal movement because such a flexure exhibits higher rigidities along a pitch direction and also a roll direction as compared to a flexure without a damper member.
- One of the objects of the present invention is to provide a suspension for disk device, which can effectively suppress the wobbling of the flexure and can also prevent an increase in the rigidity of the flexure.
- According to one embodiment, a suspension for a disk device comprises a load beam, a flexure and first and second damper members. The load beam comprises a first surface, a second surface on an opposite side to the first surface, a first opening and a second opening, which penetrate from the first surface through to the second surface. The flexure comprises a tongue disposed along the first surface, on which a slider is mounted, a first outrigger and a second outrigger disposed on respective outer sides of the tongue along a width direction thereof. The first damper member and the second damper member are attached to the second surface. The first outrigger comprises a first arm disposed on a first surface side, and a first branch portion extending from the first arm through the first opening, a distal end of which is interposed between the second surface and the first damper member. The second outrigger comprises a second arm disposed on the first surface side, and a second branch portion extending from the second arm through the second opening, a distal end of which is interposed between the second surface and the second damper member.
- The first damper member may at least partially close the first opening and be attached on the second surface in a periphery of the first opening. The second damper member may at least partially close the second opening and be attached on the second surface in a periphery of the second opening.
- The first arm may comprise a first bent portion overlapping the first opening, and the second arm may comprise a second bent portion overlapping the second opening. In this case, the first branch portion may extend from the first bent portion, and the second branch portion may extend from the second bent portion.
- The first branch portion and the second branch portion may extend in a direction crossing both a longitudinal direction and a width direction of the load beam. As another example, the first branch portion and the second branch portion may extend parallel to a longitudinal direction of the load beam.
- The first outrigger may comprise a pair of first branch portions each identical to the first branch portion, which extend from the first arm in directions different from each other, and the second outrigger may comprise a pair of second branch portions each identical to the second branch portion, which extend from the second arm in directions different from each other.
- The first opening may comprise an inner wall including a first protrusion projecting towards the first branch portion put through the first opening, and the second opening may comprise an inner wall including a second protrusion projecting towards the second branch portion put through the second opening.
- The first arm may comprise a first arm opening at least partially overlapping the first opening, and the second arm may comprise a second arm opening at least partially overlapping the second opening. In this case, the first branch portion may extend inwards in the first arm opening, and the second branch portion may extend inwards in the second arm opening.
- The suspension may further comprise a first insulating layer disposed between the distal end of the first branch portion and the second surface and a second insulating layer disposed between the distal end of the second branch portion and the second surface.
- According to a suspension for a disk drive, with such a configuration described above, the wobbling of the flexure which includes the tongue and the pair of outriggers can be effectively suppressed. Further, it is possible to suppress the increase in the rigidity of the flexure, thereby making it possible to avoid adverse effect caused on the gimbal movement.
- Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter.
- The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.
-
FIG. 1 is a perspective diagram schematically showing an example of a disk device. -
FIG. 2 is a schematic cross section of the disk device shown inFIG. 1 . -
FIG. 3 is a perspective diagram schematically showing a suspension for the disk device of the first embodiment. -
FIG. 4 is a perspective diagram schematically showing the suspension shown inFIG. 3 as viewed from a slider side. -
FIG. 5 is a schematic plan view of the suspension shown inFIG. 4 . -
FIG. 6 is a schematic cross section of the suspension taken along line F6-F6 inFIG. 5 . -
FIG. 7 is a plan view schematically showing structures of a first damping portion and a second damping portion of the suspension of the first embodiment. -
FIG. 8 is a schematic cross section of the first damping portion taken along line F8-F8 inFIG. 7 . -
FIG. 9 is a plan view schematically showing a suspension of a comparative example. -
FIG. 10 is a diagram illustrating the rigidity of the flexure in each of a suspension with a damper member and a suspension without a damper member. -
FIG. 11 is a plan view schematically showing a suspension of the second embodiment. -
FIG. 12 is a schematic cross section of a first damping portion taken along line F12-F12 inFIG. 11 . -
FIG. 13 is a plan view schematically showing a suspension of the third embodiment. -
FIG. 14 is a schematic cross section of a first damping portion, taken along line F14-F14 inFIG. 13 . -
FIG. 15 is a plan view schematically showing a suspension of the fourth embodiment. -
FIG. 16 is a schematic cross section of a first damping portion taken along line F16-F16 inFIG. 15 . -
FIG. 17 is a plan view schematically showing a suspension of the fifth embodiment. -
FIG. 18 is a schematic cross section of a first damping portion taken along line F18-F18 inFIG. 17 . -
FIG. 19 is a plan view schematically showing a suspension of the sixth embodiment. -
FIG. 20 is a schematic cross section of a first damping portion taken along line F20-F20 inFIG. 19 . - Various embodiments will be described hereinafter with reference to the accompanying drawings.
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FIG. 1 is a perspective view schematically showing an example of a disk device (HDD) 1. The disk device 1 comprises acase 2, a plurality ofdisks 4 rotating around a spindle 3, acarriage 6 pivotable around a pivot shaft 5, a positioning motor (voice coil motor) 7 for driving thecarriage 6. Thecase 2 is air-tightly sealed by a lid (not shown). -
FIG. 2 is a schematic cross section of a part of the disk device 1. As shown inFIGS. 1 and 2 , a plurality of arms (carriage arms) 8 are provided in thecarriage 6.Suspensions 10 are respectively attached to distal end portions of thearms 8.Sliders 11, each constituting a magnetic head, are respectively provided in distal end portions of thesuspensions 10. When thedisks 4 are rotated at high speed, air flows in between eachdisk 4 and therespective slider 11, thereby creating air bearings. - When the
carriage 6 is pivoted by the positioning motor 7, thesuspensions 10 move in a diametrical direction of thedisks 4, and thus thesliders 11 move to target tracks of therespective disks 4. -
FIG. 3 is a perspective view schematically showing asuspension 10 of this embodiment. Eachsuspension 10 comprises abase plate 20 fixed to the respective arm 8 (shown inFIGS. 1 and 2 ) of thecarriage 6, aload beam 21 and aflexure 22. Thebase plate 20 comprises aboss portion 20 a to be inserted to ahole 8 a (shown inFIG. 2 ) formed in therespective arm 8. - A
flexure 22 is disposed along theload beam 21. Theload beam 21 and theflexure 22 both extend in a longitudinal direction X of therespective suspension 10. Hereinafter, a direction normal to the longitudinal direction X is referred to as a width direction Y of thesuspension 10, theload beam 21, theflexure 22 and the like. Further, a swaying direction S is defined as indicated by an arc-like arrow illustrated near a distal part of theload beam 21. - The
load beam 21 includes afirst surface 21 a (shown in theFIG. 4 ) and asecond surface 21 b on an opposite side to thefirst surface 21 a. Thefirst surface 21 a is a surface on a side where theflexure 22 is disposed. As shown inFIG. 3 , adamper member 25 may be provided in thesecond surface 21 b. -
FIG. 4 is a perspective diagram schematically showing a part of the distal end side of thesuspension 10 as viewed from aslider 11 side. In the distal end portion of theslider 11 configured as a magnetic head, anelement 28 is provided such as an MR element, which can convert a magnetic signal and an electric signal into each other. Theelement 28 accesses therespective disk 4 so as to write data thereto or read data therefrom, and the like. Theslider 11, theload beam 21 and theflexure 22 and the like constitute a head gimbal assembly. - The
flexure 22 includes ametal base 40 made from a thin stainless steel plate and awiring portion 41 disposed along themetal base 40. The thickness of themetal base 40 is less than the thickness of theload beam 21. The thickness of themetal base 40 should preferably be 12 to 25 μm, and for example, 20 μm. The thickness of theload beam 21 is, for example, 30 μm. A part of thewiring portion 41 is electrically connected to theelement 28 of theslider 11 via a terminal 41 a for theslider 11. -
FIG. 5 is a plan view schematically showing the vicinity of the distal end portion of thesuspension 10 as viewed from theslider 11 side. Theflexure 22 includes atongue 45, afirst outrigger 51 and asecond outrigger 52. On thetongue 45, theslider 11 is mounted. Thefirst outrigger 51 and thesecond outrigger 52 are disposed in respective sides of thetongue 45 along a width direction Y1. For example, the width direction Y1 coincides with the width direction Y. - The
first outrigger 51 and thesecond outrigger 52 are shaped to protrude on respective sides of thetongue 45 along the width direction Y1 thereof. All of thetongue 45, thefirst outrigger 51 and thesecond outrigger 52 are parts of themetal base 40, and the outline of each of these is formed by, for example, etching. -
FIG. 6 is a schematic cross section of asuspension 10 taken along line F6-F6 inFIG. 5 . Adimple 55 which projects towards thetongue 45 is formed near the distal end of theload beam 21. Adistal end 55 a of thedimple 55 is in contact with thetongue 45. Thetongue 45 swings around thedistal end 55 a of thedimple 55 and thus can create a desired gimbal movement. Thetongue 45, thefirst outrigger 51, thesecond outrigger 52, thedimple 55 and the like constitute agimbal portion 56. - As shown in
FIGS. 4 and 5 , thefirst outrigger 51 is disposed on an outer side of a side portion of thetongue 45, so as to extend along the longitudinal direction X of theflexure 22. Thesecond outrigger 52 is disposed on an outer side of the other side portion of thetongue 45 so as to extend along the longitudinal direction X of theflexure 22. - The
first outrigger 51 includes a firstproximal end portion 51 a, a first proximal end-side arm 51 b, a first distal end-side arm 51 c and a firstjoint portion 51 d. The firstproximal end portion 51 a is fixed to theload beam 21 with a fixingportion 61. The first proximal end-side arm 51 b extends spreads from the firstproximal end portion 51 a towards the distal end of theflexure 22. An end of the first distal end-side arm 51 c is connected to the first proximal end-side arm 51 b, and the other end is connected to thedistal end portion 22 a of theflexure 22. The firstjoint portion 51 d connects the distal end of the first proximal end-side arm 51 b and one of the side portions of thetongue 45. Thedistal end portion 22 a is fixed to the vicinity of the distal end of theload beam 21 with a fixingportion 62. The fixingportions - The
second outrigger 52 has a shape similar to that of thefirst outrigger 51. In other words, thesecond outrigger 52 includes a secondproximal end portion 52 a, a second proximal end-side arm 52 b, a second distal end-side arm 52 c and a secondjoint portion 52 d. The seconddistal end portion 52 a is fixed to theload beam 21 with a fixingportion 63, which is formed by, for example, laser spot welding or the like. - As described above, both end portions of the
first outrigger 51 along the longitudinal direction X are supported with the fixingportions second outrigger 52 along the longitudinal direction X are supported with the fixingportions portions first outrigger 51 and a portion located between the fixingportions second outrigger 52 can flex in the thickness direction of themetal base 40. Thus, thetongue 45 is supported elastically by thefirst outrigger 51 and thesecond outrigger 52, so as to be swung around thedimple 55 as a supporting point. - On the
gimbal portion 56, a firstmicro-actuator element 65 and a secondmicro-actuator element 66 are mounted. Themicro-actuator elements slider 11. Bothend portions micro-actuator element 65 are fixed toactuator support members tongue 45, respectively. Bothend portions micro-actuator element 66 are fixed toactuator support members tongue 45, respectively. - The
micro-actuator elements tongue 45 along the swaying direction S (seeFIG. 3 ). In the example shown inFIGS. 4 and 5 , alimiter member 75, which inhibits excessive wobbling of thetongue 45, is provided between one side portion of thetongue 45 and thefirst outrigger 51. Anotherlimiter member 76 is also provided between the other side portion of thetongue 45 and thesecond outrigger 52. - The
suspension 10 of this embodiment comprises a first dampingportion 80 and a second dampingportion 90, configured to suppress vibration of theflexure 22. The first dampingportion 80 is provided in the vicinity of the firstproximal end portion 51 a of thefirst outrigger 51, and the second dampingportion 90 is provided in the vicinity of the secondproximal end portion 52 a of thesecond outrigger 52. -
FIG. 7 is a plan view schematically illustrating the structure of thesuspension 10 in the vicinities of the first dampingportion 80 and the second dampingportion 90.FIG. 8 is a schematic cross section of the first dampingportion 80 taken along line F8-F8 inFIG. 7 . - As shown in
FIG. 7 , theload beam 21 comprises afirst opening 81 in the vicinity of the firstproximal end portion 51 a. A part of the first proximal end-side arm 51 b overlaps thefirst opening 81. Further, the first proximal end-side arm 51 b comprises a firstbent portion 51 e in a position which overlaps thefirst opening 81. Between the firstproximal end portion 51 a and the firstbent portion 51 e, the first proximal end-side arm 51 b extends in a direction approaching the center C along the width direction Y of thesuspension 10. On the other hand, between the firstbent portion 51 e and the first distal end-side arm 51 c, the first proximal end-side arm 51 b extends in a direction away from the center C (seeFIG. 5 ). - Further, the first proximal end-
side arm 51 b comprises afirst branch portion 51 f in the vicinity of the firstbent portion 51 e. Thefirst branch portion 51 f is inserted through thefirst opening 81. Thefirst opening 81 is closed with afirst damper member 82 attached to asecond surface 21 b of theload beam 21. Thefirst damper member 82 may only partially close thefirst opening 81. The first dampingportion 80 is constituted by thefirst opening 81, thefirst damper member 82 and thefirst branch portion 51 f. - In the example shown in
FIG. 7 , thefirst branch portion 51 f extends towards the center C along an extending direction D which crosses both the longitudinal direction X and the width direction Y. Thefirst opening 81 comprises aninner wall 81 a which extends along a direction which crosses each of the longitudinal direction X, the width direction Y and the extending direction D. Thefirst branch portion 51 f overlaps theinner wall 81 a. - The
load beam 21 comprises asecond opening 91 in the vicinity of the secondproximal end portion 52 a. Thesecond opening 91 is closed by asecond damper member 92 attached to thesecond surface 21 b of theload beam 21. Thesecond damper member 92 may only partially close thesecond opening 91. Further, the second proximal end-side arm 52 b includes a secondbent portion 52 e and asecond branch portion 52 f. Thesecond branch portion 52 f is inserted through thesecond opening 91. The second dampingportion 90 is constituted by thesecond opening 91, thesecond damper member 92 and thesecond branch portion 52 f. - In the example shown in
FIG. 7 , the second proximal end-side arm 52 b, thesecond opening 91 and thesecond damper member 92 each have a line-symmetrical shape to that of the first proximal end-side arm 51 b, thefirst opening 81 and thefirst damper member 82 with respect to the center C. - As shown in
FIG. 8 , the first proximal end-side arm 51 b (the firstbent portion 51 e) is parallel to thefirst surface 21 a of theload beam 21. Thefirst branch portion 51 f includes aramp portion 511 inclined to the first proximal end-side arm 51 b and aflat portion 512 parallel to thesecond surface 21 b of theload beam 21. Theramp portion 511 is inserted through thefirst opening 81 in the vicinity of theinner wall 81 a. Theflat portion 512 is in contact with thesecond surface 21 b. - The
first damper member 82 comprises aviscoelastic material layer 83 and aconstrained plate 84. Theviscoelastic material layer 83 is formed of a high polymer material (for example, acrylic resin) which can exhibit viscous resistance when deformed, and is adhesive. The thickness of theviscoelastic material layer 83 is, for example, 51 μm. Theconstrained plate 84 is formed of a synthetic resin such as polyester, and is laminated on theviscoelastic material layer 83. The thickness of the constrainedplate 84 is, for example, 51 μm. - The
first damper member 82 is attached to thesecond surface 21 b with theviscoelastic material layer 83, in the surroundings of thefirst opening 81. The distal end of thefirst branch portion 51 f, that is, theflat portion 512, is interposed between thesecond surface 21 b and thefirst damper member 82. More specifically, theviscoelastic material layer 83 is attached to a lower portion of the surface of theflat portion 512, as shown inFIG. 8 , and an upper surface of the surface of theflat portion 512, as shown inFIG. 8 , is pushed to thesecond surface 21 b. - The cross-sectional structure of the second damping
portion 90 is similar to the cross-sectional structure of the first dampingportion 80 shown inFIG. 8 . That is, thesecond damper member 92 comprises a viscoelastic material layer and a constrained plate, and thesecond branch portion 52 f includes a ramp portion and a flat portion interposed between thesecond surface 21 b and thesecond damper member 92. - In the example shown in
FIG. 7 , note that thefirst opening 81 has such a shape that theinner wall 81 a protrudes inwards in thefirst opening 81. Similarly, thesecond opening 91 has such a shape that theinner wall 91 a opposing thesecond branch portion 52 f protrudes inwards in thesecond opening 91. Such shapes of theopenings flexure 22 to theload beam 21 in the production of thesuspension 10. More specifically, here, thefirst branch portion 51 f is inserted to a wide region located below theinner wall 81 inFIG. 7 , and further, thesecond branch portion 52 f is inserted to a wide region located below theinner wall 91 a, and while maintaining this state, theflexure 22 is slid upwards inFIG. 7 . Thus, each of thebranch portions FIG. 7 . - The operation of the
suspension 10 according to this embodiment will now be described. - When the carriage 6 (shown in
FIGS. 1 and 2 ) is pivoted by the positioning motor 7, thesuspension 10 moves in the diametrical direction of thedisks 4, and thus theslider 11 of the respective magnetic head moves to a target track of the recording surface of therespective disk 4. When voltage is applied to themicro-actuator elements elements load beam 21 can be moved by a slight amount in the swaying direction S (shown inFIG. 3 ). - The
suspension 10 of this embodiment comprises the dampingportions proximal end portions outriggers flexure 22 is applied from outside, the viscoelastic material layers 83 of thedamper members portions flexure 22. - Here, an advantageous effect of the
suspension 10 of this embodiment will be further described with reference to a comparative example.FIG. 9 is a plan view schematically showing asuspension 200 of the comparative example. As in the case of the example, thesuspension 200 comprises aflexure 210 including afirst outrigger 211 and asecond outrigger 212, and agimbal portion 220. - Further, a
first damper member 213 is provided in thefirst outrigger 211, and asecond damper member 214 is provided in thesecond outrigger 212. Thedamper members outriggers outriggers - With the
suspension 200 of such a configuration as well, the wobbling of thegimbal portion 220 can be suppressed. However, as will be described below, the rigidity of the flexure is increased in comparison with a suspension withoutdamper members -
FIG. 10 is a graph showing the rigidity of the flexure regarding each of thesuspension 200 with thedamper members FIG. 9 and a suspension without damper members. InFIG. 10 , reference symbols E and F respectively show the rigidities of thesuspension 200 along the pitch direction and the roll direction in the comparative example shown inFIG. 9 . InFIG. 10 , reference symbols G and H respectively show the rigidities of the suspension without thedamper member - As can be seen from the graph, the rigidities E and F of the flexure in the
suspension 200 with thedamper members damper members suspension 200. - On the other hand, in the
suspension 10 of this embodiment, thebranch portions outriggers second surface 21 b side of theload beam 21 via theopenings load beam 21 by thedamper members side arms first surface 21 a side of theload beam 21 and the distal end-side arms damper members outriggers damper members - Further, the
branch portions second surface 21 b side are parts branched off from the proximal end-side arms outriggers - Furthermore, with such a structure that the
branch portions load beam 21 and thedamper members branch portions - Note that, in the
suspension 200 of the comparative example shown inFIG. 9 , thedamper members outriggers damper members flexure 210 is disposed (that is, a surface corresponding to thefirst surface 21 a in the embodiment). When a shipping comb, which is used when installing thesuspension 200 in a disk device, is brought into contact with the respective surface of the load beam, the shipping comb may interfere with thedamper member damper members suspension 10 of the embodiment, thedamper members second surface 21 b of theload beam 21. With this configuration, the interference between the shipping comb and thedamper members - In addition to the above, various preferable advantages can be obtained from this embodiment.
- The structure of the damping
portions portions -
FIG. 11 is a plan view schematically showing a part of asuspension 10 of the second embodiment. In thesuspension 10, a first proximal end-side arm 51 b of afirst outrigger 51 comprises a pair ofbranch portions 51 f (51f 1 and 51 f 2) which extend out from a firstbent portion 51 e in directions different from (opposite to) each other. - In the example shown in
FIG. 11 ,first branch portions 51f 1 and 51f 2 extend to respective sides along the width direction Y. That is, the extending direction D of thefirst branch portions 51f 1 and 51f 2 is parallel to the width direction Y. - A
first opening 81 comprises a pair ofinner walls first branch portion 51 f 1 overlaps theinner wall 81 a, and thefirst branch portion 51f 2 overlaps theinner wall 81 b. Thefirst opening 81 has a shape that theinner walls first opening 81. For example, when attaching aflexure 22 to aload beam 21, first, thefirst branch portions 51f 1 and 51f 2 are inserted to a wide region of theinner walls flexure 22 is slid to an upper portion in the figure. Thus, thefirst branch portions 51f 1 and 51f 2 can be positioned at locations shown inFIG. 11 , respectively. -
FIG. 12 is a schematic cross section of a first dampingportion 80 taken along line F12-F12 inFIG. 11 . As in the case of the first embodiment, thefirst branch portions 51f 1 and 51f 2 each comprise aramp portion 511 and aflat portion 512. Theflat portions 512 of thefirst branch portion 51f 1 and 51f 2 each are interposed between thesecond surface 21 b and thefirst damper member 82. More specifically, aviscoelastic material layer 83 is attached to a lower surface of eachflat portion 512, as shown inFIG. 12 , and an upper surface of eachflat portion 512, as shown inFIG. 12 , is pushed against thesecond surface 21 b. - In the example shown in
FIG. 11 , the second proximal end-side arm 52 b of thesecond outrigger 52, thesecond opening 91 and thesecond damper member 92 have a line-symmetrical shape with respect to the first proximal end-side arm 51 b, thefirst opening 81 and thefirst damper member 82 with respect to the center C. That is, the second proximal end-side arm 52 b includes a pair ofsecond branch portions 52 f (52f 1 and 52 f 2) extending in directions different from each other, and thesecond opening 91 comprises a pair ofinner walls second branch portion 52 f 1 overlaps theinner wall 91 a and thesecond branch portion 52f 2 overlaps theinner wall 91 b. - Further, the cross-sectional structure of the second damping
portion 90 is similar to the cross-sectional structure of the first dampingportion 80 shown inFIG. 11 . That is, thesecond branch portions 52f 1 and 52f 2 each comprise a ramp portion and a flat portion, and each flat portion is interposed between thesecond surface 21 b and thesecond damper member 92. - With the structure of this embodiment in which the
outriggers branch portions outriggers outriggers branch portions -
FIG. 13 is a plan view schematically showing a part of asuspension 10 of the third embodiment. Thesuspension 10 differs from that of the example ofFIG. 11 in the shapes of thefirst opening 81 and thesecond opening 91. - That is, in the
suspension 10 shown inFIG. 13 , thefirst opening 81 comprises a pair of first projectingportions portion 81 c projects from aninner wall 81 a in a position overlapping afirst branch portion 51 f 1. The first projectingportion 81 d projects from aninner wall 81 b in a position overlapping afirst branch portion 51f 2. - Similarly, in the
suspension 10 shown inFIG. 13 , thesecond opening 91 comprises a pair of second projectingportions 91 c and 91 d. The second projecting portion 91 c projects from aninner wall 91 a in a position overlapping asecond branch portion 52 f 1. The second projectingportion 91 d projects from aninner wall 91 b in a position overlapping asecond branch portion 52f 2. - In the example shown in
FIG. 13 , the projectingportions flexure 22 to aload beam 21, the projectingportions branch portions 51f 1, 51f f 1 and 52f 2. Note that the shape of each of the projectingportions -
FIG. 14 is a schematic cross section of the first dampingportion 80 taken along line F14-F14 inFIG. 13 . The first projectingportion 81 c extends towards aramp portion 511 of thefirst branch portion 51 f 1. The first projectingportion 81 d extends towards aramp portion 511 of thefirst branch portion 51f 2. With this configuration, as compared to the example ofFIG. 12 , the areas of theflat portions 512 of thefirst branch portion 51f 1 and 51f 2, interposed between thesecond surface 21 b and thefirst damper member 82 are increased. - The cross-sectional structure of the second damping
portion 90 is also similar to the cross-sectional structure of the first dampingportion 80 shown inFIG. 14 . That is, with the second projectingportions 91 c and 91 d thus provided, the areas of the flat portions of thesecond branch portions 52f 1 and 52f 2, interposed between thesecond surface 21 b and thesecond damper member 92 are increased. - Thus, when the areas of the
branch portions 51f 1, 51f f 1 and 52f 2 interposed between thesecond surface 21 b and thesecond damper member 92 are increased, theoutriggers portions - Note that the configuration of this embodiment, in which projecting portions are provided on inner sides of the
openings suspensions 10 of the first embodiment and the fourth to sixth embodiments, which will be described below. -
FIG. 15 is a plan view schematically showing a part of asuspension 10 of the fourth embodiment. In thesuspension 10, a first proximal end-side arm 51 b of thefirst outrigger 51 comprises afirst branch portion 51 f, and a second proximal end-side arm 52 b of thesecond outrigger 52 also comprises asecond branch portion 52 f. - In the example shown in
FIG. 15 , the extending direction D of thefirst branch portion 51 f is parallel to the longitudinal direction X. Aninner wall 81 a of afirst opening 81, which overlaps thefirst branch portion 51 f, extends in a direction crossing the extending direction D, that is, for example, parallel to the width direction Y. -
FIG. 16 is a schematic cross section of a first dampingportion 80 taken along line F16-F16 inFIG. 15 . As in the cases of the other embodiments described above, thefirst branch portion 51 f comprises aramp portion 511 and aflat portion 512, and theflat portion 512 is interposed between asecond surface 21 b and afirst damper member 82. - In the example shown in
FIG. 15 , the second proximal end-side arm 52 b of thesecond outrigger 52, thesecond opening 91 and thesecond damper member 92 has a line-symmetrical shape to the first proximal end-side arm 51 b, thefirst opening 81 and thefirst damper member 82 with respect to the center C. Further, the cross-sectional structure of the second dampingportion 90 is similar to the cross-sectional structure of the first dampingportion 80 shown inFIG. 16 . - As shown in
FIG. 15 , in this embodiment, theopenings flexure 22 can be easily attached to theload beam 21. To explain, when the extending direction D of thebranch portion branch portions openings flexure 22 is slid upwards as viewed inFIG. 15 . In this manner, thebranch portions FIG. 15 . - From another point of view, the
openings branch portions openings load beam 21 can be improved. -
FIG. 17 is a plan view schematically showing a part of asuspension 10 of the fifth embodiment. In thesuspension 10, a first proximal end-side arm 51 b of thefirst outrigger 51 comprises a first arm opening 51 g. The first arm opening 51 g at least partially overlap thefirst opening 81. Thefirst branch portion 51 f is disposed inside the first arm opening 51 g. It is preferable that the position of thefirst branch portion 51 f placed in the first arm opening 51 g be the center of the first proximal end-side arm 51 b along the width direction. - In the example shown in
FIG. 17 , the extending direction D of thefirst branch portion 51 f is inclined to both of the longitudinal direction X and the width direction Y. Theinner wall 81 a of thefirst opening 81, which overlaps thefirst branch portion 51 f extends in a direction crossing each of the extending direction D, the longitudinal direction X and the width direction Y. The first arm opening 51 g has a shape elongated along the extending direction D. -
FIG. 18 is a schematic cross section of the first dampingportion 80 taken along line F18-F18 inFIG. 17 . Thefirst branch portion 51 f comprises aramp portion 511 and aflat portion 512 as in the case of the first embodiment. Theflat portion 512 is interposed betweensecond surface 21 b and thefirst damper member 82. Note that the circumferential portion of the first arm opening 51 g is not bent, but parallel to thefirst surface 21 a. - In the example shown in
FIG. 17 , the second proximal end-side arm 52 b of thesecond outrigger 52, thesecond opening 91 and thesecond damper member 92 has a line-symmetrical shape to the first proximal end-side arm 51 b, thefirst opening 81 and thefirst damper member 82 with respect to the center C. That is, the second proximal end-side arm 52 b comprises a second arm opening 52 g, and thesecond branch portion 52 f is disposed inside the second arm opening 52 g. Further, the cross-sectional structure of the second dampingportion 90 is similar to the cross-sectional structure of the first dampingportion 80 shown inFIG. 18 . - When the
first branch portion 51 f is provided inside the first arm opening 51 g as in this embodiment, the first proximal end-side arm 51 b can be fixed in a well balanced manner near the center along the width direction thereof. Similarly, when thesecond branch portion 52 f is provided inside the second arm opening 52 g, the second proximal end-side arm 52 b can be fixed in a well balanced manner near the center along the width direction thereof. - Further, even with shapes of the
openings branch portion FIG. 17 , theopenings branch portions openings load beam 21 can be improved. -
FIG. 19 is a plan view schematically showing a part of asuspension 10 of the sixth embodiment. The basic structure of thesuspension 10 is similar to that of the example shown inFIG. 11 . Note that thesuspension 10 shown inFIG. 19 differs from that of the example ofFIG. 11 in that the first dampingportion 80 comprises a pair of first insulatinglayers 85 and the second dampingportion 90 comprises a pair of second insulating layers 95. The pair of first insulatinglayers 85 overlap thefirst branch portions 51f 1 and 51f 2, respectively. The pair of second insulatinglayers 95 overlap thesecond branch portions 52f 1 and 52f 2, respectively. -
FIG. 20 is a schematic cross section of the first dampingportion 80 taken along line F20-F20 inFIG. 19 . The first insulatinglayer 85 is formed on an upper surface (a surface opposing thesecond surface 21 b) of each of theflat portions 512 of thefirst branch portions 51f 1 and 51f 2. The first insulatinglayer 85 does not reach theramp portions 511 of thefirst branch portions 51f 1 and 51f 2. - The first insulating
layer 85 is interposed between the respectiveflat portion 512 and the respectivesecond surface 21 b of theload beam 21. That is, in this embodiment, theflat portions 512 are not in contact with the respectivesecond surfaces 21 b. In the example shown inFIG. 20 , the thickness of the first insulatinglayers 85 is less than the thickness of theload beam 21 or theflat portion 512. The first insulatinglayer 85 can be formed by, for example, applying polyimide onto theflat portions 512, followed by hardening, but the forming method is not limited to this example. - The cross-sectional structure of the second damping
portion 90 is also similar to the cross-sectional structure of the first dampingportion 80 shown inFIG. 20 . That is, the second insulatinglayers 95 are formed on the flat portions of thesecond branch portions 52f 1 and 52f 2, respectively, and they are located between the flat portions and thesecond surfaces 21 b, respectively. - The
load beam 21 and the flexure 22 (the metal base 40) are all formed of a metallic material such as stainless steel or the like. With the configuration of this embodiment, in which the insulatinglayers branch portions 51f 1, 51f f 1 and 52f 2 and thesecond surfaces 21 b, the occurrence of abrasion and contamination, which may result when metal members rub against each other, can be suppressed. - Further, with such a configuration that the insulating
layers branch portions 51f 1, 51f f 1 and 52f 2, the bending process of the branch portions are not interfered with by the insulatinglayers - Note that the configuration of this embodiment, in which the insulating
layers suspensions 10 of the other embodiments. - Note that when actually carrying out the invention disclosed in each of the above-discussed embodiments, specific modes such as the shapes of the load beams and flexures and the arrangement of the first damping portions and second damping portions, or the structural elements which constitute the disk device suspension can be changed in various ways. For example, a damper member in which a first damper member and a second damper member are coupled to each other as one piece may be used. Or, first damping portions and second damping portions similar to those of the embodiments may be provided for a suspension without the
micro-actuator elements - Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
Claims (9)
1. A suspension for a disk device, the suspension comprising:
a load beam comprising a first surface, a second surface on an opposite side to the first surface, and a first opening and a second opening which penetrate from the first surface through to the second surface;
a flexure comprising a tongue disposed along the first surface, on which a slider is mounted, and a first outrigger and a second outrigger disposed on respective outer sides of the tongue along a width direction thereof; and
a first damper member and a second damper member, which are attached to the second surface,
wherein:
the first outrigger comprises a first arm disposed on a first surface side, and a first branch portion extending from the first arm through the first opening, a distal end of the first branch portion being interposed between the second surface and the first damper member, and
the second outrigger comprises a second arm disposed on the first surface side, and a second branch portion extending from the second arm through the second opening, a distal end of the second branch portion being interposed between the second surface and the second damper member.
2. The suspension of claim 1 , wherein:
the first damper member at least partially closes the first opening and is attached on the second surface at a periphery of the first opening, and
the second damper member at least partially closes the second opening and is attached on the second surface at a periphery of the second opening.
3. The suspension of claim 1 , wherein:
the first arm comprises a first bent portion overlapping the first opening,
the second arm comprises a second bent portion overlapping the second opening,
the first branch portion extends from the first bent portion, and
the second branch portion extends from the second bent portion.
4. The suspension of claim 1 , wherein the first branch portion and the second branch portion each extend in a direction crossing both a longitudinal direction and a width direction of the load beam.
5. The suspension of claim 1 , wherein the first branch portion and the second branch portion each extend parallel to a longitudinal direction of the load beam.
6. The suspension of claim 1 , wherein:
the first branch portion comprises a pair of first branch portions which extend from the first arm in directions different from each other, and
the second branch portion comprises a pair of second branch portions which extend from the second arm in directions different from each other.
7. The suspension of claim 1 , wherein:
the first opening comprises an inner wall including a first protrusion projecting towards the first branch portion inserted through the first opening, and
the second opening comprises an inner wall including a second protrusion projecting towards the second branch portion inserted through the second opening.
8. The suspension of claim 1 , wherein:
the first arm comprises a first arm opening at least partially overlapping the first opening,
the second arm comprises a second arm opening at least partially overlapping the second opening,
the first branch portion extends inwards in the first arm opening, and
the second branch portion extends inwards in the second arm opening.
9. The suspension of claim 1 , further comprising:
a first insulating layer disposed between the distal end of the first branch portion and the second surface; and
a second insulating layer disposed between the distal end of the second branch portion and the second surface.
Applications Claiming Priority (3)
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JP2019-206378 | 2019-11-14 | ||
JP2019206378A JP7301721B2 (en) | 2019-11-14 | 2019-11-14 | Disk device suspension |
JPJP2019-206378 | 2019-11-14 |
Publications (2)
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US10991388B1 US10991388B1 (en) | 2021-04-27 |
US20210151073A1 true US20210151073A1 (en) | 2021-05-20 |
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US17/073,500 Active US10991388B1 (en) | 2019-11-14 | 2020-10-19 | Suspension for disk device having a damper member for suppressing wobble of a flexure |
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US (1) | US10991388B1 (en) |
JP (1) | JP7301721B2 (en) |
CN (1) | CN112802503B (en) |
Cited By (6)
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US20220310116A1 (en) * | 2021-03-26 | 2022-09-29 | Magnecomp Corporation | Hard Disk Drive Gimbal Design With High Torsion Frequencies |
US20230197109A1 (en) * | 2021-12-21 | 2023-06-22 | Nhk Spring Co., Ltd. | Disk drive suspension |
US11688421B2 (en) | 2021-02-17 | 2023-06-27 | Magnecomp Corporation | Hard disk drive gimbal design with high yaw mode |
US11862210B2 (en) * | 2022-03-10 | 2024-01-02 | Nhk Spring Co., Ltd. | Disk drive suspension including a weld portion securing a load beam and flexure and supporting a root of a flexure outrigger |
US11900972B2 (en) * | 2020-06-10 | 2024-02-13 | Magnecomp Corporation | Non-operational shock mitigation for a suspension device |
US11915732B1 (en) | 2023-06-21 | 2024-02-27 | Magnecomp Corporation | Head gimbal assembly for hard disk drive device |
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JP7314072B2 (en) * | 2020-01-31 | 2023-07-25 | 日本発條株式会社 | Disk device suspension |
JP7314081B2 (en) * | 2020-03-11 | 2023-07-25 | 日本発條株式会社 | Disk device suspension |
JP2023091234A (en) * | 2021-12-20 | 2023-06-30 | 日本発條株式会社 | Suspension for disk device |
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US5490027A (en) * | 1991-10-28 | 1996-02-06 | Censtor Corp. | Gimbaled micro-head/flexure/conductor assembly and system |
US5282103A (en) * | 1992-10-07 | 1994-01-25 | Read-Rite Corporation | Magnetic head suspension assembly fabricated with integral load beam and flexure |
US6222706B1 (en) * | 1997-03-31 | 2001-04-24 | Seagate Technology Llc | Flexure microactuator |
US5943191A (en) * | 1997-11-26 | 1999-08-24 | Hutchinson Technology, Inc. | Head suspension with resonance damping extension |
US6967821B2 (en) | 2001-07-10 | 2005-11-22 | Seagate Technology Llc | Head gimbal assembly including dampening for air bearing vibration |
JP2005085319A (en) * | 2003-09-05 | 2005-03-31 | Hitachi Global Storage Technologies Netherlands Bv | Suspension assembly and magnetic disk unit |
JP4854043B2 (en) | 2008-10-01 | 2012-01-11 | 東芝ストレージデバイス株式会社 | Magnetic head assembly and magnetic disk drive |
JP5377177B2 (en) * | 2009-09-08 | 2013-12-25 | 日本発條株式会社 | Suspension for disk unit |
JP6159506B2 (en) | 2011-08-17 | 2017-07-05 | 大日本印刷株式会社 | Suspension, suspension with head and hard disk drive |
JP5933402B2 (en) * | 2012-09-27 | 2016-06-08 | 日本発條株式会社 | Suspension for disk unit |
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JP2016091589A (en) | 2014-11-11 | 2016-05-23 | 株式会社東芝 | Suspension assembly, head suspension assembly and disk device provided with the same |
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- 2019-11-14 JP JP2019206378A patent/JP7301721B2/en active Active
-
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- 2020-11-09 CN CN202011243258.6A patent/CN112802503B/en active Active
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US11900972B2 (en) * | 2020-06-10 | 2024-02-13 | Magnecomp Corporation | Non-operational shock mitigation for a suspension device |
US11688421B2 (en) | 2021-02-17 | 2023-06-27 | Magnecomp Corporation | Hard disk drive gimbal design with high yaw mode |
US20220310116A1 (en) * | 2021-03-26 | 2022-09-29 | Magnecomp Corporation | Hard Disk Drive Gimbal Design With High Torsion Frequencies |
US11715490B2 (en) * | 2021-03-26 | 2023-08-01 | Magnecomp Corporation | Hard disk drive gimbal design with high torsion frequencies |
US20230197109A1 (en) * | 2021-12-21 | 2023-06-22 | Nhk Spring Co., Ltd. | Disk drive suspension |
US11854582B2 (en) * | 2021-12-21 | 2023-12-26 | Nhk Spring Co., Ltd. | Disk drive suspension |
US11862210B2 (en) * | 2022-03-10 | 2024-01-02 | Nhk Spring Co., Ltd. | Disk drive suspension including a weld portion securing a load beam and flexure and supporting a root of a flexure outrigger |
US11915732B1 (en) | 2023-06-21 | 2024-02-27 | Magnecomp Corporation | Head gimbal assembly for hard disk drive device |
Also Published As
Publication number | Publication date |
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US10991388B1 (en) | 2021-04-27 |
JP7301721B2 (en) | 2023-07-03 |
JP2021082369A (en) | 2021-05-27 |
CN112802503A (en) | 2021-05-14 |
CN112802503B (en) | 2022-06-10 |
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