CN101025925B - Actuator and hard disk drive employing the same - Google Patents
Actuator and hard disk drive employing the same Download PDFInfo
- Publication number
- CN101025925B CN101025925B CN2006100641735A CN200610064173A CN101025925B CN 101025925 B CN101025925 B CN 101025925B CN 2006100641735 A CN2006100641735 A CN 2006100641735A CN 200610064173 A CN200610064173 A CN 200610064173A CN 101025925 B CN101025925 B CN 101025925B
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- China
- Prior art keywords
- arm members
- actuator
- spacer member
- step part
- pivot member
- Prior art date
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- Expired - Fee Related
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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
- G11B5/4813—Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2508—Magnetic discs
- G11B2220/2516—Hard disks
Abstract
The invention relates to an actuator and a hard disk drive having the same. The actuator has a magnetic head and is movably mounted on the top of the disk to move the head. The actuator includes: at least two arm members extending parallel to each other; a spacer interposed between and contacting the arm members to maintain a constant distance between the arm members and having a step portion to contact the arm members; a pivoting member inserted through throughholes respectively formed in the arm members and spacer, wherein the arm members and the spacer form a stack assembly and rotate around the pivot member; and a nut member screwed with the pivoting member at an end of the pivoting member and clamping the arm member and spacer with the pivoting member, wherein the step portion has a ring-shaped contact surface.
Description
Technical field
Relate to a kind of actuator and the hard disk drive that uses this actuator according to device of the present invention, relate in particular to a kind of actuator and the hard disk drive that uses this actuator with the head arm assembly that prevents supporting member (head stack assembly) deformed configurations of improvement.
Background technology
Hard disk drive is a kind of in numerous information storing devices that computing machine uses, and can be used to by head records or Copy Info.This hard disk comprises the actuator that magnetic head wherein has been installed, and this actuator is rotating magnetic head is moved on to preposition on the disc on the disc.
Fig. 1 is the decomposition diagram of actuator 200 of the prior art.Actuator 200 comprises the first arm member 221, be arranged on second arm member 241 of the first arm member 221 belows, be inserted in the spacer member 230 between the first arm member 221 and second arm member 241 and insert through hole 221 ', 230 ' and 241 ' in pivot member 210, they form head arm assembly together, wherein in the first arm member 221 and second arm member 241 and spacer member 230, form respectively above-mentioned through hole 221 ', 230 ' and 241 '.Prepare threaded portion 215 in the end of pivot member 210, the inboard of its shape and nut member 253 is complementary.Then threaded portion 215 is connected to nut member 253.Therefore, clamp arm member 221 and 241 on pivot member 210 (being the flange portion 211 of pivot member 210) and nut member 253.That is to say cramping the first arm member 221 between the flange portion 211 of pivot member 210 and spacer member 230.Cramping second arm member 241 between spacer member 230 and nut member 253.Can also between second arm 241 and nut member 253, insert packing ring 251.At an end supporting disk of spacer member 230 voice coil loudspeaker voice coil 237 around pre-determined number.Magnet is set in the housing (not shown) and makes it towards voice coil loudspeaker voice coil 237.Because the interaction in the magnetic field of the magnetic field that produced of voice coil loudspeaker voice coil 237 and magnet causes controlled current flow flowing through voice coil 237, thereby make actuator center on pivot member 210 clockwise or be rotated counterclockwise.
Simultaneously, receive from the arm member 221 of the local clamping force of the flange portion 211 of pivot member 210 or nut member 253 and 241 can along with the crooked or distortion of its vertically perpendicular direction.That is to say that arm member 221 and 241 has weak distortion resistibility, thereby carry out reading and writing data and the magnetic head that duplicates can not keep optimal spacing with the record side of disc, reduced message transmission rate or data accuracy thus.In addition, if can't suitably keep spacing between the record side of magnetic head and disc, then magnetic head will be owing to unexpected vibrations or interference and the direct collision record disc damages magnetic head and record disc thus, thereby has reduced the reliability of hard disk drive.
Summary of the invention
The invention provides a kind of actuator of the structure with improvement and use the hard disk drive of this actuator, it prevents the clamping distortion in the head arm assembly, therefore can accurately control the spacing between the record side of read/write head and disc.
According to an aspect of the present invention, provide a kind of and comprise read/write head and be movably mounted that this actuator comprises: two arm members that extend in parallel to each other above disc, to move the actuator of this read/write head; Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises the step part that contacts two arm members; Pivot member, it is inserted in the through hole that forms in two arm members and the spacer member, and wherein two arm members and spacer member form stacked wafer modules and are suitable for around this pivot member rotation; And nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member, and wherein this step part has annular contact surface.
According to a further aspect in the invention, provide a kind of and comprise read/write head and be movably mounted that this actuator comprises: two arm members that extend in parallel to each other above disc, to move the actuator of this read/write head; Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises that the projection predetermined altitude is to contact the step part of two arm members; Pivot member, it is inserted in the through hole that forms in two arm members and the spacer member, and wherein two arm members and spacer member form stacked wafer modules and are suitable for around this pivot member rotation; And nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member, wherein forms the edge cuts part in the part edge at least of step part.
According to a further aspect in the invention, provide a kind of and comprise read/write head and be movably mounted that this actuator comprises: two arm members that extend in parallel to each other above disc, to move the actuator of this read/write head; Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises the step part that contacts two arm members; Pivot member, it is inserted in the through hole that forms in two arm members and the spacer member, and wherein two arm members and spacer member form stacked wafer modules and are suitable for around this pivot member rotation; And nut member, it is with the engagement of end of pivot member and be suitable for clamping two arm members and spacer member with pivot member, and wherein the periphery along the through hole of spacer member forms step part.
According to a further aspect in the invention, a kind of hard disk drive is provided, it comprises framework and the actuator that disc-shape recoding medium is installed, this actuator comprises read/write head and is movably mounted to move this read/write head above disc that this actuator comprises: two arm members that extend in parallel to each other; Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises the step part that contacts two arm members; Pivot member, it is inserted in the through hole that forms in two arm members and the spacer member, and wherein two arm members and spacer member form stacked wafer modules and are suitable for around this pivot member rotation; And nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member, and wherein this step part has annular contact surface.
According to a further aspect in the invention, a kind of hard disk drive is provided, it comprises framework that disc-shape recoding medium is installed and has read/write head and be movably mounted to move the actuator of this read/write head above disc that this actuator comprises: two arm members that extend in parallel to each other; Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises that the projection predetermined altitude is to contact the step part of two arm members; Pivot member, it is inserted in the through hole that forms in two arm members and the spacer member, and wherein two arm members and spacer member form stacked wafer modules and are suitable for around this pivot member rotation; And nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member, wherein forms the edge cuts part in the part edge at least of step part.
Summary of drawings
By the reference accompanying drawing its one exemplary embodiment is described in detail, the above-mentioned and other feature of the present invention will be obvious, wherein:
Fig. 1 is the decomposition diagram of the actuator of prior art;
Fig. 2 shows the view of the schematic structure of the hard disk drive of one exemplary embodiment according to the present invention;
Fig. 3 shows the decomposition diagram of the structure of actuator among Fig. 2;
Fig. 4 A shows the view of the layout of the flange portion of one exemplary embodiment according to the present invention;
Fig. 4 B shows the view of the another kind of possible layout of flange portion;
Fig. 5 is the viewgraph of cross-section of actuator among Fig. 3;
Fig. 6 is the enlarged cross-sectional view of VI part among Fig. 5;
Fig. 7 A and 7B are the experimental results that the deflection of first and second arms is shown respectively.
Embodiment
Hereinafter, more at large describe the actuator of one exemplary embodiment and the hard disk drive of this actuator of use with reference to the accompanying drawings, wherein in accompanying drawing, shown one exemplary embodiment of the present invention according to the present invention.Fig. 2 shows the view of schematic structure of the hard disk drive 10 of the one exemplary embodiment according to the present invention.Hard disk drive 10 comprises the have predetermined disc disc member 20 of (being recording medium), also comprise with disc member 20 be contained in wherein box type framework 11 and the seal 13 on the top of seal frame 11.Disc in the disc member 20 is rewritable, promptly can rewrite or wipe tentation data.The representative instance of this disc is to utilize its magnetic disc of record data therein.
Disc member 20 is installed on the spindle drive motor 15 and follows spindle drive motor 15 with high speed rotating, and wherein this spindle drive motor 15 is fixed on the framework 11.When according to the memory capacity of hard disk drive 10 a plurality of disc being installed, these a plurality of discs coaxially are layered on the spindle drive motor 15.
Actuator 100 is installed makes it center on turning axle 180 rotations of stretching out from the bottom surface of framework 11.The drive signal that actuator 100 response sends from the flexible print circuit 160 that links to each other with the one side and above disc, moving, and response is left disc from the stop signal of flexible print circuit 160 transmissions.Controlling and driving signal or electric power that flexible print circuit 160 receives from the circuit substrate (not shown), this circuit substrate is arranged on the bottom of framework 11.The support 161 that is installed in the corner of framework 11 can be used to connect flexible print circuit 160 and circuit substrate.
Second side at actuator 100 is supporting the voice coil loudspeaker voice coil 37 with predetermined number of turn.Provide scheduled current with the magnetic field of in voice coil loudspeaker voice coil 137, inducting to voice coil loudspeaker voice coil 137.Magnet 17 is fixed on the framework 11 and towards voice coil loudspeaker voice coil 137.When the interaction of magnet 17 and the voice coil loudspeaker voice coil 137 that produces induced field, actuator 100 clockwise or be rotated counterclockwise.Voice coil loudspeaker voice coil 137 and magnet 17 form the critical piece that the voice coil motor of driving force is provided to actuator 100.Although not shown, can on top cover 13, fix and voice coil loudspeaker voice coil 137 interactional another magnets, it is towards voice coil loudspeaker voice coil 137.
Fig. 3 shows the decomposition diagram of the structure of actuator 100 among Fig. 2.Actuator 100 comprises first and second arm members 121 and 141 and spacer member 130.By pivot member 110 and nut member 153 crampings, first and second arm members 121 and 141 and spacer member 130, this member 110 run through first and second arm members 121 and 141 and spacer member 130 insert.On pivot member 110, screw on nut member 153.More particularly, first and second arm members 121 and 141 spaces and be parallel to each other.Spacer member 130 is inserted between first and second arm members 121 and 141.First and second arm members 121 and 141 and spacer member 130 comprise respectively through hole 121 ', 130 ' and 141 ', and pivot member 110 by through hole 121 ', 130 ' and 141 ' insert.First and second arm members 121 and 141 and spacer member 130 are set, make each through hole 121 ', 130 ' and 141 ' aim at.
First and second arm members 121 and 141 correspond respectively to the end face of disc and the record side at the back side.First and second arm members 121 and 141 quantity are corresponding to the quantity of disc in the hard disk drive.
Between first and second arm members 121 and 141, insert spacer member 130 to keep their spacing.The thickness of spacer member 30 is equivalent to disc thickness, and first and second arm members 121 and 141 can be crossed over the end face of corresponding disc respectively and the record side at the back side is extended thus.In spacer member 130,,, wait a moment described to contact and to support first and second arm members 121 and 141 round through hole 130 ' formation step part 131.Near step part 131, form coil brace 133.Coil brace 133 supports voice coil loudspeaker voice coil 137 in having the groove of predetermined depth.As mentioned above, voice coil loudspeaker voice coil 137 is by providing driving force with the interaction that is installed in the magnet in the framework 111 to actuator 100.
Form threaded portion 115 in a side opposite, and this threaded portion 115 can have the diameter less than main part 113 with flange portion 111.On the periphery of threaded portion 115, form the screw rod of the screw thread of contact nut member 153.Run through the pivot members 110 that first and second arm members 121 and 141 insert and be connected to nut member 153 by threaded portion 115, thus first and second arm members 121 and 141 and spacer member 130 be assembled into head arm assembly.In addition, can between the nut member 153 and second arm member 141, insert packing ring 151.
Therefore, head arm assembly can comprise be inserted in pivot member 110 and with nut member 153 that threaded portion 115 links to each other between first and second arm members 121 and 141 and spacer member 130.The clamping force that is provided by flange portion 111 and nut portion 153 is come cramping first and second arm members 121 and 141 and spacer member 130.First and second arm members 121 and 141 and spacer member 130 comprise respectively manhole 121 with predetermined radii ', 130 ' and 141 ', can insert pivot member 110 by this through hole.Through hole 121 ', 130 ' and 141 ' the radius edge less than the periphery of axle sleeve 113, so that this axle sleeve 113 can insert wherein by force.
The magnetic head (not shown) that reads with copy data is installed on sliding part 125 and 145.Magnetic head suspends and magnetically interacts with disc with the predetermined altitude of distance disc surface.That is to say that magnetic head reads this magnetic recording data by the electric signal that produces corresponding to the magnetic recording data, perhaps alternatively by electrical input signal the disc presumptive area is magnetized and comes record data.The a pair of magnetic head that is parallel to each other is towards two surfaces of disc, reads the data that write down on the disc or at the disc identifying recording layer according to moving of actuator.A plurality of first and second arm members 121 and 141 the quantity of predetermined quantity corresponding to disc in the hard disk drive.For example, Fig. 3 has shown the situation of single disc and two arm members, and wherein each arm is that the not ipsilateral of disc is set.
Ring-shaped step part 131 is formed in the spacer member 131, and around the through hole 130 that can insert for pivot member 110 ' periphery.Step part 131 can be formed at the both sides of spacer member 130 towards first and second arm members 121 and 141.Step part 131 projection predetermined altitudes are to contact first and second arm members 121 and 141 simultaneously.Step part 131 be formed the adjacent area that has from it (that is, from the edge member 139 that stretches out along first and second arm members 121 and 141 bearing of trend and from the coil brace 133 of edge member 139 relative formation) up and down step.
In this exemplary embodiment, in order to prevent first and second arm members 121 and 141 crooked and distortions, the step part 131 of spacer member 130 is cylindrical, and about the central shaft symmetry of pivot member 110.That is to say that in prior art shown in Figure 1, step part 231 is asymmetric about the central shaft of pivot member 110, flexural deformation can appear in first and second arm members 121 and 141 thus.In this exemplary embodiment, because step part 131 is for to have the cylindrical of constant width, step part 131 roughly is invariable at all around the radius on the direction of step part 131 with the zone that first and second arm members 121 contact with 141.Therefore, can minimize the distortion of first and second arm members 121 and 141.In Fig. 3, step part 131 is an annular, but the present invention is not limited thereto.Consider that the load that puts on first and second arm members 121 and 141 distributes, step part 131 can be not an annular, and is the shape with radius variable.
Simultaneously, in order to clamp the first arm member 121 with the uniform pressure with respect to pivot member 110 symmetries, the flange portion 111 of pivot member 110 can be for having the cylindrical of round section.More particularly, some part of cutting flange portion 111, to form a pair of cutting section 111aa that periphery has the plane, this is parallel to each other to cutting section 111aa and is convenient to tighten pivot member 110.That is to say, in the assembling of actuator 100 is handled, between first and second arm members 121 and 141, insert spacer member 130, by through hole 121 ', 130 ' and 141 ' insert pivot member 110, pivot member 110 is fastened because of nut member 153 then.At this moment, can use the suitable spanner of cutting section 111aa of shape and pivot member 110 to come clamping cutting section 111aa, so that easily tighten pivot member 110.
Fig. 4 A shows the view of layout of the flange portion 130 of the one exemplary embodiment according to the present invention.Fig. 4 B shows the view of the possible layout of flange portion 130 another kinds.In Fig. 4 A, opposed facing a pair of cutting section 111aa is arranged to be roughly parallel to the bearing of trend of first and second arm members 121 and 141.Roughly, roughly cutting part 111a is set along direction longitudinally perpendicular to first and second arm members 121 and 141 along vertical setting of first and second arm members 121 and 141 cutting part 111b not.
As mentioned above, pivot member 110 runs through that rhythmo structure inserts and clamps first and second arm members 121 and 141 and spacer member 130 with nut member 153.The first arm member 121 of the flange portion 111 of contact pivot member 110 receives clamping force and trends towards along the direction bending that makes progress, and this direction is opposite with the direction of clamping force.In this exemplary embodiment, the not cutting part 111b with relatively large surface of contact is along vertical setting of first and second arm members 121 and 141 and compress the first arm member 121, thereby prevents first and second arm members 121 and 141 bendings.Yet, in Fig. 4 B, comprise the vertical setting of the cutting part 111a ' of cutting section 111aa ' along first and second arm members 121 and 141, can't prevent first and second arm members 121 and 141 bendings thus.
Cylindrical peripheral and the marginal portion between the top at step part 131 form edge cuts part 135 (see figure 3)s.Although not shown, can form another edge cutting part in the cylindrical peripheral and the marginal portion between the bottom of step part 131, make its shape identical with edge cuts part 135.
Can form edge cuts part 135 along the cylindrical peripheral of step part 131 and the whole edge between the top.In addition, can form edge cuts part 135 in the front portion along the bearing of trend of first and second arm members 121 and 141 at edge, as shown in Figure 3.Owing to be enough to prevent distortion, so can form with respect to first and second arm members 121 and 141 bearing of trend in the right part edge cuts part 135 identical with the left part shape about the bearing of trend symmetrical structure of first and second arm members 121 and 141.Edge cuts part 135 can prevent first and second arm members 121 and 141 bendings, will be described in detail this.
Fig. 5 is the viewgraph of cross-section of actuator among Fig. 4.Referring to Fig. 5, when pivot member 110 and nut member 153 are pressed in the back of first and second arm members 121 and 141, first and second arm members 121 and 141 are applied in local clamping force, and first and second arm members 121 and 141 are applied along the direction opposite with local clamping force owing to support the repulsion that the step part 131 of first and second arm members 121 and 141 is caused.Therefore, first and second arm members 121 and 141 are vertically crooked up and down along it respectively.
Fig. 6 is the enlarged cross-sectional view of VI part among Fig. 5.With reference to figure 5, the top section of the first arm member 121 comprises the first cramping face 121a, the flange portion 111 of this first cramping face 121a face contact pivot member 110.The base section of the first arm member 121 comprises the second cramping face 121b, the edge of the step part 131 of this second cramping face 121b contact pivot member 110.Edge at step part 131 forms edge cuts part 135, and therefore the contact area of the second cramping face 121b is less than the contact area of the first cramping face 121a.That is to say, as shown in Figure 6, short to the length L 1 of the end of the first cramping face 121a to the length L 2 of the end of the second cramping face 121b than central shaft from pivot member 110 from the central shaft of pivot member 110.Therefore, because step part 131 provides less relatively support, so first and second arm members 121 and 141 trend towards the direction bending towards step part 131.This bending force is opposite with the bending force that local clamping is produced, thereby these bending forces are cancelled out each other.Therefore, first and second arm members 121 and 141 levels.
As shown in Figure 6, edge cuts part 135 can be circle with predetermined curvature or the edge taper of being convenient to manufacture process, but the present invention is not limited thereto.In addition, can form edge cuts part 135 along any direction at the edge of the periphery of step part 131.For example, edge cuts part 135 can be formed at the front portion of first and second arm members 121 and 141, as shown in Figure 3, but also can be formed at any position of satisfying the top condition that prevents first and second arm members 121 and 141 bendings.
Fig. 7 A and 7B show experimental result and are used to confirm effect of the present invention.Fig. 7 A and 7B have shown the perpendicular displacement of first and second arm members 121 and 141.Line A represents perpendicular displacement of the prior art, line B represents the perpendicular displacement when forming the cylindrical stage exponent part in spacer member of according to the present invention one exemplary embodiment, and line C represents that according to the present invention one exemplary embodiment is when forming the cylindrical stage exponent part and perpendicular displacement during in the edge of step part formation edge cuts part in spacer member.
In Fig. 7 A and 7B, point 1, point 2 and put the measurement point of 3 expressions along vertical selection of first and second arm members 121 and 141.Point 1 is illustrated in the front end measurement point of (near a side of suspension), and point 3 is illustrated in the measurement point of rear end (near a side of through hole), is illustrated in a little 1 and put and begin the measurement point of a segment distance from front end between 3 and put 2.
Perpendicular displacement is defined as first and second arm members 121 and 141 vertical ranges that move about the horizontal datum distortion.When the first arm 121 was bent upwards, the perpendicular displacement of the first arm 121 was just (+), and when second arm 141 was bent downwardly, the perpendicular displacement of second arm 141 was just (+).
First and second arm members 121 and 141 vertical deformation increase from its rear end forward end, thereby the first arm member 121 is bent upwards and second arm member 141 is bent downwardly in all cases.Yet the maximum distortion of one exemplary embodiment and the vertical deformation between the minimal deformation according to the present invention (i.e. first and second arm members 121 and 141 distortion) difference is littler than of the prior art.This represents that in the present invention first and second arm members 121 and 141 are crooked hardly.Therefore, form the performance that cylindrical stage exponent part and edge cuts part has just improved actuator.
The actuator of one exemplary embodiment and have the hard disk drive of this actuator according to the present invention can prevent the head arm assembly flexural deformation in the actuator, thereby can accurately control the spacing between the record side of the magnetic head that supported by head arm assembly and disc.Therefore, can improve speed and the degree of accuracy that data transmit.Owing to keep this spacing,, thereby carry invariablely by product reliability so magnetic head is not subjected to the damage of external interference.In addition, need not accurately to control the clamping force of pivot member to prevent the distortion in the head arm assembly assembling process.Therefore, this assembling process is simple and quick.
Though shown especially and described the present invention with reference to exemplary embodiment, those skilled in the art understand and can limit the modification of carrying out under the situation of scope of spirit of the present invention on various forms and the details not breaking away from claims.
It is that the korean patent application of No.10-2005-0080619 and the application number submitted in United States Patent Office (USPO) on August 31st, 2005 are No.60/712 that the application requires in the application number that on August 31st, 2005 submitted to, 405 U.S. Provisional Application No., at this full text of quoting them as a reference.
Claims (22)
1. one kind has read/write head and is movably mounted to move the actuator of described read/write head above disc, and described actuator comprises:
Two arm members that extend in parallel to each other;
Spacer member, its be inserted between two arm members with keep two between the arm member spacing and comprise the step part that contacts two arm members;
Pivot member, it inserts the through hole that forms in two arm members and the spacer member, and wherein two arm members and spacer member form stacked wafer modules and are suitable for around this pivot member rotation; And
Nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member,
Wherein, described step part has annular contact surface, and
Wherein, form the edge cuts part in the part edge at least on the periphery of described step part.
2. according to the described actuator of claim 1, wherein, form described step part along the periphery of the through hole of spacer member.
3. according to the described actuator of claim 2, wherein, the width of the surface of contact of described step part changes along the periphery of the through hole of spacer member.
4. according to the described actuator of claim 1, wherein, described step part stretches out equal height at each pleurapophysis of spacer member.
5. according to the described actuator of claim 1, wherein, described edge cuts partly is an edge taper.
6. according to the described actuator of claim 1, wherein, described edge cuts is partly for having the circle of predetermined curvature.
7. according to the described actuator of claim 1, wherein, form the edge cuts part in the part edge at least on the periphery of the front side of two arm member bearing of trends of step part.
8. according to the described actuator of claim 1, wherein, pivot member comprises:
Insert the main part of described through hole; And
Flange portion, it is along radially stretching out and arm member is applied clamping force from described main part.
9. according to the described actuator of claim 8, wherein, described flange portion comprises the plate-like with side plane.
10. according to the described actuator of claim 9, wherein, described flange portion comprises the plate-like that has the cutting part that comprises side plane and comprise the not cutting part of round sides, and along the described not cutting part of vertically being provided with of two arm members.
11. according to the described actuator of claim 9, wherein, described flange portion comprises two side planes that are parallel to each other.
12. according to the described actuator of claim 8, wherein, between the step part of the flange portion of pivot member and spacer member in the cramping arm member one, and this arm member comprises first cramping face that contacts with the flange portion face and the second cramping face that contacts with the step part face, and the area of the described first cramping face is greater than the area of the described second cramping face.
13. according to the described actuator of claim 12, wherein, the length between the end of the central shaft of pivot member and the first cramping face is longer than the length between the end of the central shaft of pivot member and the second cramping face.
14., wherein, also comprise and support the coil brace that places near the voice coil loudspeaker voice coil of step part according to the described actuator of claim 8.
15. one kind comprises read/write head and is movably mounted to move the actuator of described read/write head above disc, described actuator comprises:
Two arm members that extend in parallel to each other;
Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises that the projection predetermined altitude is to contact the step part of two arm members;
Pivot member, it inserts the through hole that forms in two arm members and the spacer member, and wherein, two arm members and spacer member formation stacked wafer modules also are suitable for around this pivot member rotation; And
Nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member,
Wherein, in the part edge at least of described step part, form the edge cuts part.
16., wherein, form step part along the periphery of the through hole of spacer member, and form the edge cuts part in the part edge at least on the periphery of described step part according to the described actuator of claim 15.
17., wherein, form the edge cuts part in the part edge at least on the periphery of the front side of two arm member bearing of trends according to the described actuator of claim 15.
18. according to the described actuator of claim 15, wherein, edge cuts partly is edge taper or has the circle of predetermined curvature.
19. one kind comprises read/write head and is movably mounted to move the actuator of described read/write head above disc, described actuator comprises:
Two arm members that extend in parallel to each other;
Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises the step part that contacts two arm members;
Pivot member, it inserts the through hole that forms in two arm members and the spacer member, and wherein, two arm members and spacer member formation stacked wafer modules also are suitable for around this pivot member rotation; And
Nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member,
Wherein, form step part along the periphery of the through hole of spacer member, and
Wherein, form the edge cuts part in the part edge at least on the periphery of described step part.
20. according to the described actuator of claim 19, wherein, step part comprises the annular contact surface that its width can change along the periphery of the through hole of spacer member.
21. a hard disk drive comprises the framework and the actuator that are used to install disc-shape recoding medium, this actuator comprises read/write head and is movably mounted to move this read/write head above disc that this actuator comprises:
Two arm members that extend in parallel to each other;
Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises the step part that contacts two arm members;
Pivot member, it inserts the through hole that forms in two arm members and the spacer member, and wherein, two arm members and spacer member formation stacked wafer modules also are suitable for around this pivot member rotation; And
Nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member,
Wherein, this step part has annular contact surface, and
Wherein, form the edge cuts part in the part edge at least on the periphery of described step part.
22. a hard disk drive comprises the framework and the actuator that are used to install disc-shape recoding medium, this actuator comprises read/write head and is movably mounted to move this read/write head above disc that this actuator comprises:
Two arm members that extend in parallel to each other;
Spacer member, it is inserted between two arm members with the spacing that keeps two arm members and comprises that the projection predetermined altitude is to contact the step part of two arm members;
Pivot member, it inserts the through hole that forms in two arm members and the spacer member, and wherein, two arm members and spacer member formation stacked wafer modules also are suitable for around this pivot member rotation; And
Nut member, its end with pivot member meshes and is suitable for clamping two arm members and spacer member with pivot member,
Wherein, in the part edge at least of step part, form the edge cuts part.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71240505P | 2005-08-31 | 2005-08-31 | |
| US60/712,405 | 2005-08-31 | ||
| KR1020050080619A KR100723500B1 (en) | 2005-08-31 | 2005-08-31 | Actuator and hard disk drive employing the same |
| KR80619/05 | 2005-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025925A CN101025925A (en) | 2007-08-29 |
| CN101025925B true CN101025925B (en) | 2011-12-07 |
Family
ID=38099274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100641735A Expired - Fee Related CN101025925B (en) | 2005-08-31 | 2006-08-31 | Actuator and hard disk drive employing the same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100723500B1 (en) |
| CN (1) | CN101025925B (en) |
| SG (1) | SG165325A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5557839A (en) * | 1992-04-08 | 1996-09-24 | Hewlett-Packard Company | Method of fabricating an improved transducer suspension assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3237672B2 (en) * | 1993-11-12 | 2001-12-10 | シーゲイト テクノロジー エルエルシー | Actuator assembly |
| US5793569A (en) * | 1996-04-10 | 1998-08-11 | Hutchinson Technology, Inc. | Three piece suspension |
| JP3356138B2 (en) * | 1999-10-27 | 2002-12-09 | 日本電気株式会社 | Magnetic head positioning mechanism |
-
2005
- 2005-08-31 KR KR1020050080619A patent/KR100723500B1/en not_active IP Right Cessation
-
2006
- 2006-08-30 SG SG201006296-6A patent/SG165325A1/en unknown
- 2006-08-31 CN CN2006100641735A patent/CN101025925B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5557839A (en) * | 1992-04-08 | 1996-09-24 | Hewlett-Packard Company | Method of fabricating an improved transducer suspension assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070024953A (en) | 2007-03-08 |
| SG165325A1 (en) | 2010-10-28 |
| KR100723500B1 (en) | 2007-05-31 |
| CN101025925A (en) | 2007-08-29 |
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