CN1797549A - Micro-driver unit with vibration damper, magnetic head folding sheet combination and disk drive unit thereof - Google Patents
Micro-driver unit with vibration damper, magnetic head folding sheet combination and disk drive unit thereof Download PDFInfo
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- CN1797549A CN1797549A CN 200410082303 CN200410082303A CN1797549A CN 1797549 A CN1797549 A CN 1797549A CN 200410082303 CN200410082303 CN 200410082303 CN 200410082303 A CN200410082303 A CN 200410082303A CN 1797549 A CN1797549 A CN 1797549A
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- Supporting Of Heads In Record-Carrier Devices (AREA)
Abstract
The invention relates to a magnetic head folding sheet combination, which comprises: a magnetic head; a micro-driver for adjusting the position of the magnetic head; a cantilever member (suspension) for supporting the microactuator; and a damper located between the microactuator and the suspension. Wherein the micro-driver includes: the piezoelectric actuator comprises a first base plate, a pair of actuator side arms extending from the first base plate in a first direction, wherein at least one actuator side arm is provided with a piezoelectric element. The shock absorber includes: a second substrate coupled to the microactuator and the cantilever member; and at least one damping arm extending from the second base piece in either the first direction or the second direction, the at least one damping arm including at least one piezoelectric element thereon. The invention also discloses a disk drive with the vibration damper.
Description
Technical field
The present invention relates to a kind of disc drive unit, refer to a kind of microdrive unit and magnetic head fold piece combination especially with vibration damper.
Background technology
Disc driver is a kind of information-storing device that uses the magnetic medium storage data.With reference to figure 1a, existing typical disc driver (Disk Drive) comprises that a disk and one are used to drive magnetic head fold piece combination 277 (Head Gimbal Assembly, actuating arm HGA) (magnetic head fold piece combination 277 is provided with a cantilever part (indicating) that magnetic head 203 is housed).Wherein, disk is contained in one in order on the Spindle Motor that drives the disk rotation, a voice coil motor (Voice-Coil Motor, VCM) be used for the motion of controlling and driving arm, thereby control head 203 moves to next track from a track on magnetic disk surface, and then reads or write data from disk.
Yet, in the stroke of magnetic head 203 and since voice coil motor (VCM) and cantilever part intrinsic tolerance (Tolerance) cause magnetic head 203 inclined to one side rails, magnetic head 203 can not carry out good position control, thereby influences magnetic head 203 read or write data from disk.
In order to address the above problem, piezo-electric micro driver (piezoelectric (PZT) micro-actuator) is used to adjust the displacement (displacement) of magnetic head 203.That is piezo-electric micro driver is adjusted the displacement of magnetic head 203 with a less amplitude, and compensates the tolerance of voice coil motor (VCM) and cantilever part.Like this, can make the track width become littler, can increase the TPI value (' tracks perinch ' value) of 50% disc driver, also can reduce magnetic head simultaneously and lead and seek the rail time (promptly having increased its surface recording density).
With reference to figure 1b, traditional piezo-electric micro driver 205 is provided with the ceramic frame 297 of a U-shaped.This U-shaped ceramic frame 297 comprises two ceramic arms 207, and wherein each ceramic arm 207 is provided with a piezoelectric patches (not shown) in the one side.With reference to figure 1a and 1b, piezo-electric micro driver 205 links to each other with cantilever part 213 physics, wherein, in each ceramic arm 207 1 side, three 209 (gold goal welding (gold ball bonding that receive that are electrically connected are arranged, GBB) or the tin ball bonding meet (solder bump bonding, SBB)) microdrive 205 be connected on the cantilever part cable 210.In addition, also have four 208 (GBB or SBB) that receive of being electrically connected to be used to realize being electrically connected between magnetic head 203 and the cantilever part cable 210.Fig. 1 c has then showed the detailed process of magnetic head 203 being inserted microdrive 205.Wherein, 2: 206 on magnetic head 203 and two the ceramic arms 207 put 212 bonding by epoxy glue, thereby makes the motion of magnetic head 203 depend on the ceramic arm 207 of microdrive 205.
When electric current puts on the microdrive 205 by cantilever part cable 210, thereby the piezoelectric patches of microdrive 205 will expand or shrink ceramic arms 207 distortion of two of causing U-shaped ceramic frame 297 and magnetic head 203 is moved on the track of disk.Like this, a good head position adjustment (head positionadjustment) just can realize.
Yet, because described piezo-electric micro driver 205 and magnetic head 203 are installed on the cantilevered tab (not indicating), when piezo-electric micro driver 205 is excited, it will be done simple translation and magnetic head 203 is waved on disk, described oscillating motion will produce a reacting force that acts on cantilevered tab, thus cause one with shake the identical cantilever part resonance of resonance that the cantilever part substrate causes.This will influence dynamic property and the servo bandwidth of restriction disc driver and the raising of memory capacity of magnetic head fold piece combination.As shown in Figure 2, resonance curve when the cantilever part substrate is shaken in label 201 representatives, resonance curve when label 202 representatives excite microdrive 205, in the frequency range of 20K, this curve is in the gain peak of positive side and many cantilever part frequency responses of tossing about, and this gain trace has shown relatively poor resonance characteristics.This figure clearly shows the problems referred to above.
Therefore, providing a kind of microdrive unit, magnetic head fold piece combination, disc driver is necessity to address the above problem real.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of magnetic head fold piece combination, and this magnetic head fold piece combination has good resonance performance when exciting the microdrive unit.
Another object of the present invention is to provide a kind of microdrive unit with vibration damper.
A further object of the present invention is to provide a kind of disc drive unit with big servo bandwidth and memory capacity.
For achieving the above object, a kind of magnetic head fold piece combination of the present invention comprises: magnetic head; Adjust the microdrive of head position; Be used to support the cantilever part (suspension) of described microdrive; And the vibration damper between described microdrive and cantilever part.Wherein, described microdrive comprises: the first base portion sheet, a pair of with first direction from the described first base portion sheet extended driver side arm, wherein at least one driver side arm has piezoelectric element.
In one embodiment, described vibration damper comprises: the second base portion sheet that links to each other with cantilever part with microdrive; And at least one from the second base portion sheet with first direction or the extended vibration damping arm of second direction, include at least one piezoelectric element on described at least one vibration damping arm.Wherein, described first direction and second direction are all perpendicular to the described second base portion sheet.In another embodiment, described vibration damper comprise two from the second base portion sheet with first direction or the extended vibration damping arm of second direction, the free end of described two vibration damping arms interconnects.In yet another embodiment, described vibration damper comprises that from the second base portion sheet with first direction or the extended single vibration damping arm of second direction, described single vibration damping arm extends out from the middle part or the sidepiece of the described second base portion sheet.
In the present invention, between microdrive and vibration damper, form first parallel clearance; Between cantilever part and described at least one vibration damping arm, form second parallel clearance.Described at least one piezoelectric element is membrane piezoelectric element or ceraminator.Described each piezoelectric element can be single layer structure or sandwich construction.A kind of microdrive of the present invention unit comprises: the microdrive that is used to adjust head position; Wherein said microdrive comprises the first base portion sheet, a pair of with first direction extended driver side arm from the first base portion sheet, wherein has piezoelectric element at least one driver side arm; And the vibration damper that links to each other with microdrive.
In the present invention, described vibration damper comprises the second base portion sheet that links to each other with microdrive, at least one with first direction or extended at least one the vibration damping arm of second direction, includes at least one piezoelectric element on described at least one vibration damping arm from the second base portion sheet.
A kind of disc drive unit of the present invention comprises: magnetic head fold piece combination; The actuating arm that is connected with described magnetic head fold piece combination; Disk; And in order to rotate the Spindle Motor of described disk.Wherein, described magnetic head fold piece combination comprises: magnetic head; In order to adjust the microdrive of head position, a cantilever part is supporting magnetic head and microdrive, and the vibration damper between microdrive and cantilever part; Wherein said microdrive comprises: the first base portion sheet, a pair of with first direction from the described first base portion sheet extended driver side arm, wherein at least one driver side arm has piezoelectric element; Wherein, described vibration damper comprises: the second base portion sheet that links to each other with cantilever part with microdrive; At least one with first direction or the extended vibration damping arm of second direction, includes at least one piezoelectric element on described at least one vibration damping arm from the second base portion sheet.
Compared with prior art, the present invention is provided with a vibration damper between microdrive and cantilever part, like this, when microdrive is excited and is mobile, consequent first reacting force will be passed to vibration damper, simultaneously, vibration damper also is excited and produces the reacting force that another and first reacting force offset certainly.So just do not have power to put on the cantilever part, accordingly, the cantilever part resonance that produces owing to microdrive work will be eliminated.In addition, owing to be eliminated in the cantilever part resonance of low-frequency range, and only have the microdrive resonance of high band to take place, so just increased the servo bandwidth and the memory capacity of disk drive.
For making the present invention easier to understand, further set forth different concrete of the present invention below in conjunction with accompanying drawing
Embodiment.
Description of drawings
Fig. 1 a is the stereographic map of existing magnetic head fold piece combination (HGA);
Fig. 1 b is the enlarged partial view of Fig. 1 a;
Fig. 1 c has showed magnetic head has been inserted general process in the microdrive of magnetic head fold piece combination among Fig. 1 a (HGA);
Fig. 2 has showed the resonance curve (resonance curve) of magnetic head fold piece combination among Fig. 1 a;
Fig. 3 is the stereographic map of magnetic head fold piece combination of the present invention (HGA) first embodiment;
Fig. 4 is the amplification partial perspective view of magnetic head fold piece combination among Fig. 3;
Fig. 4 a is the local amplification view of the piezoelectric patches of magnetic head fold piece combination among Fig. 4;
Fig. 5 is the exploded view of Fig. 4;
Fig. 6 be among Fig. 3 magnetic head fold piece combination in the partial side view in microdrive zone;
Fig. 7 a has showed the electrical connection between two piezoelectric patches of magnetic head fold piece combination among Fig. 3, and according to one embodiment of the invention, described two piezoelectric patches have identical polarised direction;
Fig. 7 b has showed the electrical connection between two piezoelectric patches of magnetic head fold piece combination among Fig. 3, and according to one embodiment of the invention, described two piezoelectric patches have opposite polarised direction;
Fig. 7 c has showed the oscillogram that is added in shown in Fig. 7 b two voltages on two piezoelectric elements respectively;
Fig. 7 d has showed the oscillogram that is added in shown in Fig. 7 a the voltage on two piezoelectric elements respectively;
Fig. 7 e has showed the principle of work of the vibration damper of magnetic head fold piece combination among Fig. 3;
Fig. 8 a and 8b are the contrast resonance curve figure of magnetic head fold piece combination among Fig. 3;
Fig. 9 a-9g is the stereographic map of seven different embodiment of vibration damper of the present invention;
Figure 10 is the stereographic map of an embodiment of disc drive unit of the present invention.
Embodiment
With reference to figure 3, a kind of magnetic head fold piece combination 3 of the present invention comprises magnetic head 31, microdrive 32 and is used to carry the cantilever part 8 of described magnetic head 31 and microdrive 32.Described magnetic head fold piece combination 3 further comprises the vibration damper 33 between microdrive 32 and cantilever part 8.
With reference to figure 3, cantilever part 8 comprises load beam (load beam) 17 equally, flexible element (flexure) 13, articulated part (hinge) 15 and substrate (base plate) 11.Be provided with plural electrode contacts 308 on flexible element 13, plural electrode contacts 308 1 ends link to each other with control system (not shown), and the other end and plural cable 309,311 link to each other.With reference to figure 4 and Fig. 5, described flexible element 13 also comprises that a cantilever tongue piece (suspension tongue) 328 is used to support described vibration damper 33, microdrive 32 and magnetic head 31.With reference to figure 6, load beam 17 is provided with a kick 329 in order to supporting cantilever tongue 328.
To Fig. 5, a stop means 207 is formed on the described load beam 17 with reference to figure 3, its pass cantilevered tab 328 in order to stop cantilevered tab 328 in the disc driver operate as normal, be given a shock or overbend when clashing into.Described cantilevered tab 328 is provided with plural electrode contacts 113 and 310.The electrode contacts 113 of magnetic head 31 on one end respective cantilevered tongue 328 is provided with plural electrode contacts 204.
In the present invention, with reference to figure 3-5, described microdrive 32 comprises a U type framework, and described U type framework comprises 321,323 and end arms 320 that are attached thereto of two side arms.Each side arm 321,323 is provided with at least one piezoelectric patches, such as piezoelectric patches 321a and 323a.As shown in Figure 5, also comprise a plurality of counter electrodes contact 310 on described each side arm 321,323 and the electrode contacts 327 established.In one embodiment, piezoelectric patches 321a is connected with the outer wall of side arm 321, and piezoelectric patches 323a is connected with the outer wall of side arm 323.
In the present invention, described vibration damper 33 comprises a framework and at least one piezoelectric patches that is attached thereto.Described framework links to each other with cantilever part 8 with microdrive 32.
With reference to figure 5, first embodiment according to the invention, described framework also is a U type framework, described U type framework comprises 331,333 and end arms 330 that are attached thereto of two side arms.When described framework was connected with microdrive 32, described side arm 321,323 extended out from end arm 320 with first direction, and simultaneously, side arm 331,333 is extended out by end arm 330 along the direction identical with first direction respectively.Described each side arm 331,333 also comprises a plurality of electrode contacts 337 corresponding to electrode contacts 310.Described U type framework can be made by metal (such as stainless steel), pottery, silicon (for example monocrystalline silicon) or polymkeric substance.Two piezoelectric patches 331a, 333a connect or anisotropic conductive film (anisotropic conductive film, ACF) connection as epoxy glue respectively by traditional connected mode, link to each other with side arm 331,333.In one embodiment, piezoelectric patches 331a is connected with the madial wall of side arm 331, and piezoelectric patches 333a is connected with the madial wall of side arm 333.
Described piezoelectric patches 321a, 323a, 331a, 333a are preferably made by thin films of piezoelectric material, and it can be the single or multiple lift piezoelectric element.Equally, piezoelectric patches 321a, 323a, 331a, 333a also can be made by the piezoelectric ceramics material, and it can be the single or multiple lift piezoelectric element.。
With reference to figure 4a, as an embodiment, piezoelectric patches 321a is by two kinds of electrodes 352 or 358 sandwich constructions that are superimposed.At piezoelectric patches 321a one end, two kinds of electrodes 352,358 link to each other with two electrode contacts 355 respectively.In one embodiment, described piezoelectric patches 321a, 323a, 331a, 333a have single segment structure or multi-segment structure.
With reference to figure 3-5, in one embodiment of the invention, magnetic head 31 links to each other by 2 points (not indicating) part by two epoxy glue points 324 and two side arms 321,323.Described microdrive 32 and vibration damper 33 are by linking to each other described vibration damper 33 by ACF, tackifier or epoxy glue and be connected in by end arm 330 parts on the cantilevered tab 328 of flexible element 13 with epoxy glue 404 with end arm 320 with end arm 330.Then, plural Metal Ball 305 (GBB, SBB or electro-conductive adhesive) is used for the electrical connection contact 327 of described microdrive 32 is electrically connected with the contact 337 that is electrically connected of vibration damper 33.Simultaneously, plural Metal Ball 380 (GBB, SBB or electro-conductive adhesive) is used for the electrical connection contact 337 of vibration damper 33 is connected with the electrical connection contact 310 of cantilevered tab 328.Like this, microdrive 32, vibration damper 33 are just realized electrically connecting with two cables 311 of cantilever part 8.In addition, plural Metal Ball 405 is used for the electrical connection contact 113 of magnetic head 31 and the electrode contacts 113 on cantilevered tab 328 moving plates are electrical connected, thereby magnetic head 31 and cable 309 are electrical connected.By cable 309,311, connecting terminal 308 is with magnetic head 31 and microdrive 32 and control system be electrical connected (not shown).
In the present invention, with reference to figure 6, between vibration damper 33 and cantilevered tab 328, form a parallel clearance 505, in order to guarantee moving freely of vibration damper 33.In addition, between microdrive 32 and vibration damper 33, also form a parallel clearance 503.Here, because magnetic head 31 is connected with two side arms, 321,323 parts, and form a parallel clearance 503 between microdrive 32 and the vibration damper 33, so when microdrive 32 was driven, magnetic head 31 can move freely.
How specifically set forth vibration damper below with reference to Fig. 7 a-7e works.Fig. 7 a has showed two piezoelectric patches 323a, and the electrical connection between the 333a, described piezoelectric patches 323a, 333a are arranged on the same side near cantilevered tab 328.In this embodiment, with reference to figure 7a, described two piezoelectric patches 323a, 333a has identical polarised direction, and they are by an end 404 common grounds, and other end 401a and 401b are applied in two voltages with same sinusoidal waveform 407 (seeing Fig. 7 d).When sinusoidal voltage 407 is added to two piezoelectric patches 323a, 333a, in first semiperiod, described two piezoelectric patches 323a, 333a will increase and shrink along with driving voltage, then again along with its original position is got back in the reduction of driving voltage gradually.Because piezoelectric patches 323a is bonded to the outside of side arm 323, sidepiece 323 will be by curved to the outside, and accordingly, a reacting force F1 is created on the end arm 320.Because the end arm of microdrive 32 is bonded on the egative film 330 of vibration damper 33, so described reacting force F1 will be passed to vibration damper egative film 330 immediately.Simultaneously, because piezoelectric patches 333a is bonded in the inboard of lateral plate 333, so described lateral plate 333 is by curved extremely inboard.A reacting force F2 will produce on the egative film of vibration damper 33.Here, reacting force F1 and F2 are controlled as equal and opposite in direction, and direction is opposite, are zero so put on making a concerted effort on the end arm 330.Be appreciated that cantilever part 8 generals are not affected because of the motion of side arm 323.(have opposite phase with first semiperiod) when sinusoidal voltage 407 enters second semiperiod, piezoelectric patches 323a, 333a will increase and expand along with driving voltage, get back to its original position then again along with reducing along with driving voltage.Accordingly, reacting force F1 and F2 will change its direction, and what put on end arm 330 still is zero with joint efforts. Piezoelectric patches 321a, 331 principle of work and piezoelectric patches 323a, 333a is similar, is not described in detail in this.
According to another embodiment of the present invention, described two piezoelectric patches 321a, 331a have opposite polarised direction, shown in Fig. 7 b, one end 404 is by common ground, and other end 401a is applied two voltages with different phase waveforms 406,408 (ginseng Fig. 7 c) respectively with 401b.Under described driven, piezoelectric patches 321a, 331a will shrink in the same semiperiod gradually, get back to its original position then again; When entering down half period, piezoelectric patches 321a, 331a will shrink gradually, get back to its original position then again.Similarly, reacting force F1 and F2 will produce, and it is applied to end arm 330 still is zero with joint efforts.
Fig. 8 a and 8b have showed the test result of magnetic head fold piece combination resonance performance of the present invention.Here, label 802 has been showed microdrive work resonance curve (micro-actuator operation resonancecurve), and it has phase curve 806; Label 803 has been showed the resonance curve of vibration damper work, and it has opposite phase 804.Under the help of vibration damper 33, the vibration of cantilever part 8 is eliminated.Label 805 has been showed the resonance gain trace of magnetic head fold piece combination of the present invention, and label 808 has been showed its phase curve.Described accompanying drawing has showed that equally cantilever part resonance does not occur in low-frequency range, thereby has enlarged servo bandwidth and increased the capacity of disc driver, has reduced simultaneously and has sought rail and positioning time.
According to second embodiment of the invention, with reference to figure 9a, microdrive 32 and vibration damper 33 can bond together by following state: side arm 321,323 extends out from end arm 320 with first direction, and side arm 331,333 is to extend out from end arm 330 in the opposite direction with first party.According to third embodiment of the invention, with reference to figure 9b, the framework of microdrive 32 and vibration damper 33 can one-body moldedly be a framework, promptly has end arm 23 and two side arms 27,29 of one.Two gaps 25 are respectively formed on two side arms 27,29, thereby side arm 27 is divided into first side arm 321 ' and second side arm 331,, will, side arm 29 is divided into first side arm 323 ' and second side arm 333 '.
According to fourth embodiment of the invention, with reference to figure 9c, the framework of vibration damper 33 can further comprise the top arm 334 that connects two side arms 331,333.In the 5th embodiment, with reference to figure 9d, described two piezoelectric patches 333a can be connected to side arm 331,333 outsides.
According to sixth embodiment of the invention, with reference to figure 9e, vibration damper 33 can have a framework that comprises end arm 330 and single side arm 337, and described single side arm 337 extends out from the middle part of end arm 330.Two piezoelectric patches 337a, 337b are bonded in the both sides of side arm 337.According to seventh embodiment of the invention, with reference to figure 9f, described vibration damper 33 can have a framework that comprises end arm 330 and single side arm 338, and described single routine arm 338 extends out from the end of end arm 330.Two piezoelectric patches 338a are bonded in the both sides of side arm 338.According to eighth embodiment of the invention, with reference to figure 9g, vibration damper 33 has a framework that comprises end arm 330 and single side arm 339, and described single side arm 339 extends out from the end of end arm 330.Two piezoelectric patches 339a are bonded in the both sides of side arm 339.Vibration damper 33 and microdrive 32 combination by bonding end arm 320 and end arm 330.Simultaneously, side arm 321,323 extends out from end arm 320 with first direction, and side arm 339 is to extend out from end arm 330 in the opposite direction with first party.The principle of work of the foregoing description and first embodiment is similar, is not describing in detail at this.
Compared with prior art, the present invention is provided with a vibration damper between microdrive and cantilever part, like this, when microdrive is excited and is mobile, consequent first reacting force will be passed to vibration damper, simultaneously, vibration damper also is excited and produces the reacting force that another and first reacting force offset certainly.So just do not have power to put on the cantilever part, accordingly, the cantilever part resonance that produces owing to microdrive work will be eliminated.In addition, owing to be eliminated in the cantilever part resonance of low-frequency range, and only have the microdrive resonance of high band to take place, so just increased the servo bandwidth and the memory capacity of disk drive.
In the present invention, with reference to Figure 10, the disc drive unit that the present invention has a damping behavior can and have according to voice coil motor 107 the present invention design, have the magnetic head fold piece combination 3 of good resonance performance when microdrive is made fine position by assemble case 108, disk 101, Spindle Motor 102 and obtains.Because this structure, working method and the packaging technology of disc drive unit are known by those of ordinary skills, making under the clear and definite prerequisite of the present invention, this are no longer described in detail.
Claims (18)
1. a magnetic head fold piece combination (head gimbal assembly) is characterized in that comprising:
Magnetic head;
Adjust the microdrive of head position; Wherein said microdrive comprises: the first base portion sheet, a pair of with first direction from the described first base portion sheet extended driver side arm, wherein at least one driver side arm has piezoelectric element;
Be used to support the cantilever part (suspension) of described microdrive; And
Vibration damper between described microdrive and cantilever part.
2. magnetic head fold piece combination as claimed in claim 1 is characterized in that: described vibration damper comprises:
The second base portion sheet that links to each other with cantilever part with microdrive;
At least one with first direction or the extended vibration damping arm of second direction, includes at least one piezoelectric element on described at least one vibration damping arm from the second base portion sheet.
3. magnetic head fold piece combination as claimed in claim 2 is characterized in that: described first direction and second direction are all perpendicular to the described second base portion sheet.
4. magnetic head fold piece combination as claimed in claim 2 is characterized in that: described vibration damper comprise two from the second base portion sheet with first direction or the extended vibration damping arm of second direction, the free end of described two vibration damping arms interconnects.
5. magnetic head fold piece combination as claimed in claim 2, it is characterized in that: described vibration damper comprises that from the second base portion sheet with first direction or the extended single vibration damping arm of second direction, described single vibration damping arm extends out from the middle part or the sidepiece of the described second base portion sheet.
6. magnetic head fold piece combination as claimed in claim 2 is characterized in that: form first parallel clearance between microdrive and vibration damper; Between cantilever part and described at least one vibration damping arm, form second parallel clearance.
7. magnetic head fold piece combination as claimed in claim 2 is characterized in that: described at least one piezoelectric element is membrane piezoelectric element or ceraminator.
8. magnetic head fold piece combination as claimed in claim 2 is characterized in that: described each piezoelectric element is single layer structure or sandwich construction.
9. microdrive unit comprises:
Be used to adjust the microdrive of head position; Wherein said microdrive comprises the first base portion sheet, a pair of with first direction extended driver side arm from the first base portion sheet, wherein has piezoelectric element at least one driver side arm; And
The vibration damper that links to each other with microdrive.
10. microdrive as claimed in claim 9 unit, it is characterized in that: described vibration damper comprises the second base portion sheet that links to each other with microdrive, at least one with first direction or extended at least one the vibration damping arm of second direction, includes at least one piezoelectric element on described at least one vibration damping arm from the second base portion sheet.
11. microdrive as claimed in claim 10 unit is characterized in that: described first direction and second direction are all perpendicular to the described second base portion sheet.
12. microdrive as claimed in claim 10 unit is characterized in that: described vibration damper comprise two from the second base portion sheet with first direction or the extended vibration damping arm of second direction, the free end of described two vibration damping arms interconnects.
13. microdrive as claimed in claim 10 unit, it is characterized in that: described vibration damper comprises that from the second base portion sheet with first direction or the extended single vibration damping arm of second direction, described single vibration damping arm extends out from the middle part or the sidepiece of the described second base portion sheet.
14. microdrive as claimed in claim 10 unit is characterized in that: between described microdrive and vibration damper, form a parallel clearance.
15. microdrive as claimed in claim 10 unit is characterized in that: described at least one piezoelectric element is membrane piezoelectric element or ceraminator.
16. microdrive as claimed in claim 10 unit is characterized in that: described each piezoelectric element is single layer structure or sandwich construction.
17. a disc drive unit comprises:
Magnetic head fold piece combination;
The actuating arm that is connected with described magnetic head fold piece combination;
Disk; And
In order to rotate the Spindle Motor of described disk; It is characterized in that described magnetic head fold piece combination comprises:
Magnetic head;
In order to adjust the microdrive of head position; Wherein said microdrive comprises: the first base portion sheet, a pair of with first direction from the described first base portion sheet extended driver side arm, wherein at least one driver side arm has piezoelectric element;
Support the cantilever part of magnetic head and microdrive; And
Vibration damper between microdrive and cantilever part.
18. a disc drive unit as claimed in claim 17 is characterized in that comprising: described vibration damper comprises:
The second base portion sheet that links to each other with cantilever part with microdrive;
At least one with first direction or the extended vibration damping arm of second direction, includes at least one piezoelectric element on described at least one vibration damping arm from the second base portion sheet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100823039A CN100530359C (en) | 2004-12-30 | 2004-12-30 | Micro driver unit, fold piece set of magnetic head, and disc drive unit possessing vibration damper |
| JP2005378256A JP2006190456A (en) | 2004-12-30 | 2005-12-28 | Microactuator unit equipped with vibration attenuating arrangement, head gimbal assembly, and disk drive unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100823039A CN100530359C (en) | 2004-12-30 | 2004-12-30 | Micro driver unit, fold piece set of magnetic head, and disc drive unit possessing vibration damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1797549A true CN1797549A (en) | 2006-07-05 |
| CN100530359C CN100530359C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100823039A Expired - Fee Related CN100530359C (en) | 2004-12-30 | 2004-12-30 | Micro driver unit, fold piece set of magnetic head, and disc drive unit possessing vibration damper |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006190456A (en) |
| CN (1) | CN100530359C (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06309822A (en) * | 1992-08-12 | 1994-11-04 | Toshiba Corp | Record reproducing head and record reproducer using this head |
| WO1998019304A1 (en) * | 1996-10-31 | 1998-05-07 | Tdk Corporation | Recording/reproducing head, recording/reproducing head positioning mechanism and recorder/reproducer |
| JP3675315B2 (en) * | 2000-08-24 | 2005-07-27 | Ｔｄｋ株式会社 | Head gimbal assembly having an actuator for minute positioning of a head element and disk apparatus having the head gimbal assembly |
| JP4144196B2 (en) * | 2001-07-04 | 2008-09-03 | 新科實業有限公司 | Vibration suppression mechanism and head gimbal assembly with vibration suppression mechanism |
| JP4144197B2 (en) * | 2001-07-04 | 2008-09-03 | 新科實業有限公司 | Vibration suppression mechanism and head gimbal assembly with vibration suppression mechanism |
-
2004
- 2004-12-30 CN CNB2004100823039A patent/CN100530359C/en not_active Expired - Fee Related
-
2005
- 2005-12-28 JP JP2005378256A patent/JP2006190456A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN100530359C (en) | 2009-08-19 |
| JP2006190456A (en) | 2006-07-20 |
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| PB01 | Publication | ||
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Granted publication date: 20090819 Termination date: 20101230 |