CN101009442B - Symmetric sound coil motor combination and its assembly method and micro hard disk storage system - Google Patents
Symmetric sound coil motor combination and its assembly method and micro hard disk storage system Download PDFInfo
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- CN101009442B CN101009442B CN2006100046335A CN200610004633A CN101009442B CN 101009442 B CN101009442 B CN 101009442B CN 2006100046335 A CN2006100046335 A CN 2006100046335A CN 200610004633 A CN200610004633 A CN 200610004633A CN 101009442 B CN101009442 B CN 101009442B
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Abstract
A method for forming a cylindrical voice coil motor combination with a central axis includes the following steps: (a) forming one magnetic head cantilever combination; forming one coil combination with at least a pair of coils and an interior magnet yoke; (b) forming a permanent magnetic patch device with at least a pair of ring magnetic patches and an exterior magnet yoke; (c) forming top and bottom bearing combinations; (d) connecting the magnetic head cantilever combination to the coil combination; (e) inserting the coil combination to a region formed by inner circumference of the permanent magnetic patch device formed by at least one pair of ring magnetic patches; and (f) inserting the top and bottom bearing combinations into the region formed by the inner circumference of the coil combination formed by the interior magnet yoke.
Description
Technical field
The present invention relates generally to data-storage system.More specifically, the present invention relates to comprise voice coil motor combination hard disk drive, assembling voice coil motor combination method and contain the hard disk drive of voice coil motor combination.More specifically, the present invention relates to be used for the symmetric form voice coil motor combination of disk drive.
Background technology
A kind of common information storing device is a disk drive system, and it uses magnetic media to store data and the portable read/write head that is arranged at this magnetic media top comes optionally on the magnetic media reading of data or data are write on the magnetic media.
The consumer always hopes that the memory capacity of this type disk drive system constantly increases, and hopes that simultaneously its read or write speed is more accurate sooner.Therefore disc drive manufacturers is devoted to develop the disk system with higher storage capacity always, such as increasing the density of track through track width or the mode of track pitch that reduces on the disk, and then increases the memory capacity of disk indirectly.Yet, along with the increase of track density, to the also raising accordingly of position control accuracy of read/write head, so that in compact disk, realize more accurate sooner read-write operation.Along with the increase of track density, use conventional art to realize that more accurately read/write head being positioned track suitable on the disk sooner becomes difficult more.Therefore, disc drive manufacturers is sought the mode of raising to the read/write head position control always, so that the benefit of utilizing ever-increasing track density to bring.
A kind of method that improves read/write head position control accuracy on compact disc that disc drive manufacturers is often used also is microdrive for adopting second driver.This microdrive cooperates common position control accuracy and the speed that realizes read/write head with a master driver.The disk system that comprises microdrive is called as Dual-drive system.
Once developed many Dual-drive systems that are used to improve access speed and read/write head bearing accuracy on the track of compact disk in the past.This Dual-drive system generally includes a keynote coil motor driver and a secondary microdrive, such as PZT microdrive (be piezo-electric micro driver, be designated hereinafter simply as piezo-electric micro driver).This voice coil motor driver is controlled by servo-control system, and this servo-control system causes the actuating arm rotation, carries read/write head on this actuating arm so that read/write head is positioned on the track suitable on the memory disc.Piezo-electric micro driver and voice coil motor driver are used common raising access speed and realize the fine setting of read/write head position on track.Voice coil motor driver is to the position coarse adjustment of read/write head, and piezo-electric micro driver is to the accurate adjustment of read/write head with respect to the position of disk.Through the cooperation of two drivers, realize data efficient and accurate read-write operation on memory disc jointly.
A kind of known being used to realizes the microdrive of read/write head fine position is included piezoelectric element.This piezo-electric micro driver has relevant electronic installation, and this electronic installation can cause the piezoelectric element on the microdrive optionally to shrink or expand.Piezo-electric micro driver has suitable structure, makes the contraction of piezoelectric element or the motion that expansion causes microdrive, and then causes the motion of read/write head.With respect to the disk system of only using voice coil motor driver, the motion of this read/write head can realize the adjustment more accurately sooner of read/write head position.
In traditional disc drive unit, disk is installed on the Spindle Motor, so that driven and rotated by this Spindle Motor.(head gimbal assembly, HGA), this magnetic head fold piece combination comprises the microdrive with magnetic head, has the read-write sensor on this magnetic head to carry magnetic head fold piece combination on the voice coil motor arm.(voice-coil motor, the VCM) motion of control voice coil motor arm, and then control head moving between the lip-deep track of disk finally realized read/write head data write on disk to one voice coil motor.When running status, form aerodynamic force property between the magnetic head that comprises read/write head and the disk of rotation and contact, and produce lift.The mutual balance of elastic force that the cantilever by magnetic head fold piece combination of this lift and opposite sign but equal magnitude applies, and then cause in the process of motor arm rotation, the surface of the disk of rotation forms and keeps predetermined flying height.
Yet because the inherent error and the asymmetrical strength driving method of voice coil motor, magnetic head can't be realized fast and accurate position control on the contrary, but influences the performance that read/write head is is accurately read and write data on the disk.For this reason, increase above-mentioned piezo-electric micro driver, so that improve the position control accuracy of magnetic head and read/write head.More particularly, with respect to voice coil motor driver, this piezo-electric micro driver is adjusted the displacement of magnetic head with littler amplitude, so as the compensation voice coil motor with (or) resonance error of magnetic head cantilever combination.This piezo-electric micro driver makes that using littler track pitch becomes possibility, and can the track density (TPI, the track quantity that per inch is contained) of disk system be improved 50%, can reduce seeking rail time and positioning time of magnetic head simultaneously.Therefore, this piezo-electric micro driver can increase substantially the surface recording density of the information-stored disk of magnetic disk drive.Yet the piezoelectric Micro Actuator cost is higher, and when operation, needs high drive current.
Hard disk drive, the miniature hard disk drive that especially the present invention relates to has benefited from having less size and stable driver (actuator).Only have a coil in the voice coil motor system of many hard disk drives, this coil is enough to successfully move.But, between the center of gravity and the centre of force, be difficult to obtain useful relation for unicoil.And, use asymmetrical strength driving method can cause device unstable, and should not be used in the occasion of periodicity high speed rotating, for example be used in disc driver or the magnetooptical disc driver.
In field of data storage, the weight of coil is commonly used to offset the weight of head arm, so that auxiliary balance driver (actuator).Like this, coil drive power is asymmetric usually.Therefore, in high-end product, in hard disk drive, increase by second driver (piezo-electric micro driver for example mentioned above) so that reduce the wrong frequency that takes place of derailing.
Existing hard disk drive (HDD) generally includes a driver (actuator), and this driver is used on the upper surface of disk and lower surface moving head and carries pivot arm move back and forth (realizing like this data are write magnetic hard-disk and data are read).Voice coil motor has two types of designs usually: moving-coil type (moving coil) and moving-magnetic type (moving magnet).In these two types, the magnetic patch design of moving more is prevalent in the hard disk drive that exists on the current market usually.
Fig. 1 has showed existing typical miniature hard disk drive, and this miniature hard disk drive comprises coil mobile model voice coil motor, and with this voice coil motor as driver (actuator).In disk drive shown in Figure 1, voice coil motor has three parts: magnetic patch 1, magnetic grip 2 and moving coil 3.This moving coil 3 can be encouraged by drive current.After this moving coil 3 was energized, actuating arm 7 and magnetic head fold piece combination 6 were around axle 8 rotations, and this axle 8 is fixing with respect to base 10.Because the eccentricity that potential mobile equilibrium effect and Spindle Motor 9 are possible, magnetic head 4 possibly need the position of adjustment self, reads from disk 5 so that correctly data are write in the disk 5 of vibrations or fluctuation or with data.
Fig. 2 has showed traditional hard disk drive, especially magnetic patch mobile model miniature hard disk drive.In device shown in Figure 2, magnetic patch 1 ' and magnetic are gripped 2 ' and can be moved, and coil combination 3 ' then is fixed on the base 10.In this device,, can simplify assembling flow path through coil-type is changed into embedded flexible loop 3 ' from the coiling form.According to faraday's principle, coil and permanent magnet with energy produce Lorentz force, if coil limits and is fixed in base 10, this interaction power will cause magnetic patch, actuating arm 7 and magnetic head fold piece combination 6 motions and rotate around axle 8.Thereby make magnetic head 4 to be moved and adjust the relative position of magnetic head 4 on disk 5 by servocontrol.Correspondingly, the voice coil motor structure of symmetry and the similar of Spindle Motor 9.Though magnetic patch mobile model voice coil motor size reduce and the cost reduction aspect have advantage, yet it has the risk of magnetic patch stained (contamination), this risk does not receive the favor of magnetic disk drive manufacturer.
In traditional system, with respect to coil mobile model voice coil motor, magnetic patch mobile model voice coil motor needs slightly little space (footprint) usually in hard disk drive.Under ordinary meaning, magnetic patch mobile model and coil mobile model voice coil motor all will use a pair of driving force to produce relative motion.Along with reducing of hard disk drive size, adopt the voice coil motor of symmetric design to become difficult more.Therefore, though developed symmetrical design, they are not by industry-wide adoption, because or at least in part because above-mentioned variety of issue.
Fig. 3 has showed traditional coil mobile model voice coil motor.Except magnetic patch 1 and bottom magnetic are gripped (bottom yoke) 2a, this voice coil motor comprises that also being used for the auxiliary top magnetic that increases magnetic flux density grips (top yoke) 2b.Generally, in coil mobile model voice coil motor, there are two clearances.A clearance is present between magnetic patch 1 and the coil 3, and another then is present in coil 3 and top magnetic is gripped between the 2b.Yet, in magnetic patch mobile model voice coil motor, only have a clearance usually.The present invention can reduce the clearance in the moving-coil type voice coil motor combination.
Though magnetic patch mobile model voice coil motor advantages of small volume, thinner thickness and cheap, its weight is heavier usually.With respect to traditional coil mobile model voice coil motor, bigger weight can cause magnetic patch mobile model voice coil motor to produce bigger moment of inertia.In addition, if under embedded flexible ring, have the infiltrative material that is used to increase magnetic flux density, the electromagnetic force (interactive force) that is applied on the magnetic patch can cause bigger friction.This friction further causes magnetic patch mobile model voice coil motor slower than the movement velocity of coil mobile model voice coil motor.
And, use asymmetric driving method inadvisable.For example some devisers like in voice coil motor combination, forming the layout of symmetry.Yet, in existing known voice coil motor design, be difficult in the other coil of introducing in the voice coil motor combination.Though some symmetric designs are proposed use, yet these symmetric designs are bulky and efficient is lower, are not enough to be widely used.
The present invention is intended to solve the above-mentioned one or more problems that are present in the existing voice coil motor combination, and voice coil motor design symmetry and that volume is littler is provided, and this voice coil motor combination is particularly useful for miniature hard disk drive.
Summary of the invention
According to one embodiment of present invention; The method of the cylindrical voice coil motor combination that a kind of formation has central axis is provided, comprises step: the actuating arm of the magnetic head cantilever combination through will having magnetic head fold piece combination and actuating arm is connected to magnetic head fold piece combination and forms this magnetic head cantilever combination; Formation has the coil combination of at least one pair of coil and inner yoke, and wherein this coil combination has the excircle that is made up of said at least one pair of coil, reaches from said central axis to the radius of measuring the inner periphery that is formed by said inner yoke from the radius of measuring between said central axis to the excircle that is made up of said at least one pair of coil, the inner periphery that is formed by said inner yoke; Formation has the permanent magnet device of at least one pair of annular magnetic patch and outside yoke; Wherein this permanent magnet device has inner periphery that is formed by said at least one pair of annular magnetic patch and the radius of measuring to this inner periphery from said central axis; Wherein, should be from central axis to the radius of measuring the inner periphery that forms by said at least one pair of annular magnetic patch greater than from said central axis to the radius of measuring the excircle that constitutes by said at least one pair of coil; Form the combination of top and bottom bearing; Wherein this top and bottom bearing make up the radius of measuring the excircle that has excircle and make up from central axis to said bearing; Wherein, The radius measured between the excircle of combination from the central axis to the bearing, less than from said central axis to the radius of measuring the inner periphery that forms by said inner yoke; Said magnetic head cantilever is connected on the said coil combination; Said coil combination is inserted on the zone that the inner periphery by said permanent magnet device forms, and said inner periphery is made up of said at least one pair of annular magnetic patch; And the combination of said top and bottom bearing is inserted on the zone that the inner periphery by said coil combination forms, said inner periphery is gripped by said inner magnet and is constituted.
Through following description and combine accompanying drawing, it is more clear that the present invention will become, and these accompanying drawings are used to explain embodiments of the invention.
Description of drawings
Fig. 1 has showed traditional coil mobile model miniature hard disk drive.
Fig. 2 has showed existing magnetic patch mobile model miniature hard disk drive with symmetric design.
Fig. 3 has showed the structure of the traditional voice coil motor that is used in device shown in Figure 1.
Fig. 4 has showed the described symmetrical expression moving coil type of one embodiment of the invention miniature hard disk drive.
Fig. 5 has showed the described voice coil motor design of one embodiment of the invention, and this voice coil motor design is shown in the miniature hard disk drive shown in the circle 4 simultaneously.
Fig. 6 is the described exploded view that contains the driver (actuator) of voice coil motor shown in Figure 5 of one embodiment of the invention.
Fig. 7 has showed the magnetic flux density of voice coil motor shown in Figure 5.
Fig. 8 has showed the current density of voice coil motor shown in Figure 5.
Fig. 9 has showed the coil of voice coil motor shown in Figure 5 and the magnetic flux distribution figure that magnetic is gripped.
Embodiment
With reference now to Fig. 4-9, describe embodiments of the invention, the similar elements label is represented similar elements in the accompanying drawing.As stated, the present invention provides a kind of voice coil motor combination of improved, the miniature hard disk drive that is used for having symmetric construction.It should be noted that: voice coil motor combination of the present invention can be used for any suitable, need driver (actuator) to improve disk drive such as magnetic head control and resonance performance, and no matter the concrete structure of the magnetic head fold piece combination of disk drive and other assembly how.That is, the present invention is not limited to the ad hoc structure shown in described here the reaching, but can be used in any suitable miniature hard disk drive in any field.Yet an advantage of the present invention is: if desired, the present invention can be applied to one with existing disk drive shown in Figure 1 similarly, its magnetic head fold piece combination or other primary clustering do not have in the disk drive of big change.
Fig. 4 has showed a preferred embodiment of the present invention.Fig. 4 has showed the described hard disk drive of one embodiment of the invention, says it is the miniature hard disk drive with coil mobile model (MC-type) voice coil motor clearly.Except the change of voice coil motor,, similar on the design of this disc driver and the design overall of traditional disk drives symmetrical configuration to be provided and to improve outside its operation.In other words, the structure of some parts among this embodiment is such as the structure of magnetic head fold piece combination 106, actuating arm 107 and base 110 and the similar of traditional disk drives.As traditional disk drives, disc driver shown in Figure 4 also comprises magnetic head 104, disk 105 and Spindle Motor 109.Voice coil motor design shown in Figure 4 is symmetry not only, and with respect to traditional device, can make device occupy littler space.
In miniature hard-drive (like miniature hard disk drive), seldom having the space holds extra coil usually.Yet according to the present invention, a plurality of extra coils are introduced into favourable and effective and efficient manner, so that improve its operation.As shown in Figure 5, around bearing combination 111 formation four coils (103a, 103b, 103c and 103d) of said voice coil motor.This bearing combination 111 allows around a central axis rotation.
Fig. 5 has showed that simultaneously being arranged at external magnetic grips two pairs of inboard magnetic patch of (outer yoke) 102a.Ring-type magnetic patch (ring magnet) 101a and 101b be the arctic of the last formation of diametric plane (inner radial surface) within it all, and ring-type magnetic patch 101c and 101d all form the South Pole on the diametric plane (inner radial surface) within it.Be two pairs though should be noted that said in this embodiment ring-type magnetic patch and coil, however said ring-type magnetic patch and coil also can for such as a pair of, three pairs or more.
In this embodiment, all by its two adjacent ring-type magnetic patch influences, one of them ring-type magnetic patch has the arctic on the diametric plane within it to each coil 103a-103d, and another ring-type magnetic patch has the South Pole on the diametric plane within it.This voice coil motor removable and have the coil of energy and fixing permanent magnet produces Lorentz force (Lorentz force); Because these coils and magnetic patch are with respect to rotating shaft 8 symmetries; Reacting force is able to reduce; And obtain simple rotation, thereby improved the serviceability of disk drive around center of gravity.
Except external magnetic was gripped 102a, inner magnet was gripped (inner yoke) 102b and also is used so that increase the magnetic flux density of said coil 103a-103d.Because the design of symmetry and inner magnet is gripped and magnetic patch between the electromagnetism equilibrium of forces, make bearing arrangement smoothly and running effectively.And said coil can be gripped with said inner magnet and fit together, thereby reduces coil and the inner magnet clearance between gripping.Through reducing coil and the inner magnet clearance between gripping, make the littler and usage space more effectively of driver (actuator) volume.In addition, gripping the placement coil near inner magnet has increased the intensity of coil, thereby has reduced the crooked and distortion of coil when motion, and has reduced the vibration of disk drive simultaneously.
Fig. 6 has showed the exploded view (having showed a plurality of unassembled part of this driver and the general assemble method of this driver simultaneously) of middle driver embodiment illustrated in fig. 5.Driver among this embodiment comprises two magnetic head fold piece combination 106 and two magnetic heads 104, and one of them magnetic head is used for the upper surface of hard disk, and another magnetic head is used for the lower surface of hard disk.Actuating arm is usually by a metal material, forms the shape of E shape piece through machining such as aluminium or magnesium.Yet, can use any job operation here.Through all magnetic head fold piece combination being laminated on its corresponding driving arm the actuating arm of E shape piece is connected on its magnetic head fold piece combination, thereby forms magnetic head cantilever combination (head stack assembly) 113.
Has the central axis hole that is used to hold top and bottom bearing combination 115 on the right cylinder of coil combination 112.The coil of four symmetries (103a-103d) can combine with this coil combination 112 and form son combination.Said head cantilever combination 113 is connected to this coil combination 112 through nut 114 or other coupling arrangement.Said magnetic head cantilever combination 113 does not need directly to be connected with coil combination 112.In fact, specific syndeton is unimportant, and this syndeton can change according to using specific occasion of the present invention to some extent.After magnetic head cantilever combination 113 is connected to coil combination through nut 114, can with bearing make up 115 or pivotal mounting in it.This moment, the movable member of said driver assembled.For reducing magnetic patch, can assemble fixing permanent magnet device 116 (comprise annular magnetic patch 101a-101d and external magnetic grip 102a) individually by stained risk.Shown in Fig. 5-6, after assembled, said voice coil motor (comprising coil combination 112, bearing combination 115 and magnetic patch device 116) is with respect to the central axis symmetry of passing said bearing combination 115.Then; This driver can be installed in the disc unit and be connected to servo-control system (figure does not show) effectively; So that controllably magnetic head is moved on the surface of disk 105, this disk 105 is driven by Spindle Motor 109 and rotates, thereby realizes data are read or write from disk.
Fig. 7 has showed the magnetic flux density polar plot of voice coil motor system shown in Figure 5.According to current density shown in Figure 8, total driving force can be calculated acquisition by computer simulation.Fig. 9 has showed the profile diagram that above-mentioned coil and magnetic are gripped.Above-mentioned each figure helps to design within the scope of the invention voice coil motor such as Fig. 9.And according to the prompting here, business software can be used for designing voice coil motor such as ANSOFT and comprises the hard disk driver system of the voice coil motor of symmetry.
In addition, according to faraday's cardinal rule of magnetics, when designing the voice coil motor of symmetry according to the present invention, Lorentz force (Lorentz force) can calculate acquisition according to Finite Element Method.
Following table 1 has been listed the difference of voice coil motor design on data in the existing voice coil motor design (voice coil motor for example shown in Figure 1) and the embodiment of the invention.
| ? | Existing design | The embodiment of the invention |
| Internal coil diameter (mm) | 0.06 | 0.08 |
| Coil form | 12x?11 | 10x?9 |
| The coil number of plies | 16 | 10 |
| All-in resistance (ohm) | 23.43 | 16.08 |
| Clearance (mm) | 0.40 | 0.20 |
| Pass the average flux density (Tesla) of coil | 0.50 | 0.60 |
| Total driving force (mN) | 87 | 114 |
Table 1
Last table explanation for example can make magnetic flux density increase about 20% by less clearance provided by the invention (0.2mm).This table has shown that simultaneously total driving force is approximately 114mN, greater than the original value 87mN of existing design.Like this, on existing platform, symmetrical voice coil motor driver of the present invention can obtain better to reach more effective performance.
Can know from the foregoing description, the invention provides: the driver (voice coil motor such as disclosing here can be little by 30%) that (1) is littler than traditional miniature hard disk drive volume; (2) through using symmetrical voice coil motor to obtain more stable driver; (3) obtain stronger magnetic flux density through the clearance that reduces in the magnetic field; (4) be able to reduce from the bending of coil and the vibration of twisted mode.Compare with existing design, above-mentioned advantage forms an improved voice coil motor combination.
As time goes on, hard disk drive reduces such as the physical size of miniature hard disk drive gradually.When physical size reduced, dynamic property must improve, and driver must be more effective.Here the symmetrical voice coil motor that discloses provides convenience, economic solution, so that utilize the free space in the miniature hard disk drive.Though had the magnetic patch mobile model voice coil motor with balanced configuration, they have distinct structure and operation characteristic, and the above-mentioned advantage by the present invention's acquisition described here is not provided.And unlike the embodiment that narrates here, many hard disk drive products of pushing the existing market to adopt asymmetric coil mobile model voice coil motors.By contrast, the preferred embodiment here provides improved coil mobile model voice coil motor with symmetrical structure, and said voice coil motor can be used for a large amount of receiving in the device (actuated device), such as DVD pick-up head and similar device.Compare with traditional voice coil motor combination, the not only overall symmetry of voice coil motor combination of the present invention, but also less clearance is provided.In addition, though voice coil motor of the present invention comprises other coil (comparing with traditional voice coil motor combination), its comprehensive space structure is still fully little than traditional hard disk driver system (comprising the miniature hard disk drive system).Like this, the invention provides such as a kind of and realize that capacity is higher, volume is less and the solution of lower-cost disc driver.And the voice coil motor of symmetry has improved dynamic property.
Generally speaking, the sensitivity of driver is the function of the driving force and the moving-member weight of voice coil motor.In miniature hard disk drive, the design of voice coil motor mainly is subject to the size of disk.It is a kind of challenge that the symmetric form voice coil motor is inserted narrower space, even to insert it in simple relatively single driver control system also be like this.The present invention helps to overcome the challenge of this space.
Usually in driver, only need a coil, so that produce single shaft control.But can cause injurious consequences with the center of the inharmonic power of center of gravity, such as vibration, its seriousness depends on the certain applications occasion.If the servo-drive system of driver can not be controlled this vibration, then need second driver.Yet this second driver has increased cost, and is not the solution of an economy.The present invention provides more effectively driver through the symmetric design that use has a plurality of coils, and reduces even eliminated the needs of second driver of use in disc driver.
Invention has been described more than to combine most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.
Claims (1)
1. a formation has the method for the cylindric voice coil motor combination of central axis, it is characterized in that comprising the steps:
(a) form one and comprise (i) magnetic head fold piece combination and the (ii) magnetic head cantilever combination of actuating arm, said magnetic head cantilever combination forms through said actuating arm is connected with magnetic head fold piece combination;
Formation has (i) at least one pair of coil and the (ii) coil combination of inner yoke, and wherein this coil combination has the excircle that is made up of said at least one pair of coil, reaches from said central axis to the radius of measuring the inner periphery that is formed by said inner yoke from the radius of measuring between said central axis to the excircle that is made up of said at least one pair of coil, the inner periphery that is formed by said inner yoke;
(b) form and to have (i) at least one pair of the annular magnetic patch and the (ii) permanent magnet device of outside yoke; Wherein this permanent magnet device has inner periphery that is formed by said at least one pair of annular magnetic patch and the radius of measuring to this inner periphery from said central axis; Wherein, should be from central axis to the radius of measuring the inner periphery that forms by said at least one pair of annular magnetic patch greater than from said central axis to the radius of measuring the excircle that constitutes by said at least one pair of coil;
(c) form the combination of top and bottom bearing; Wherein this top and bottom bearing make up the radius of measuring the excircle that has excircle and make up from central axis to said bearing; Wherein, from the central axis to the bearing between the excircle of combination the radius measured less than from said central axis to the radius of measuring the inner periphery that forms by said inner yoke;
(d) said magnetic head cantilever is connected on the said coil combination;
(e) said coil combination is inserted on the zone that the inner periphery of the permanent magnet device that is made up of said at least one pair of annular magnetic patch forms; And
(f) combination of said top and bottom bearing is inserted into by said inner magnet grips on the zone that the inner periphery of the said coil combination that constitutes forms.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100046335A CN101009442B (en) | 2006-01-26 | 2006-01-26 | Symmetric sound coil motor combination and its assembly method and micro hard disk storage system |
| JP2007014574A JP2007202394A (en) | 2006-01-26 | 2007-01-25 | Symmetrical voice coil motor structure, method for assembly thereof and hard disk microdrive information storage device equipped with the motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100046335A CN101009442B (en) | 2006-01-26 | 2006-01-26 | Symmetric sound coil motor combination and its assembly method and micro hard disk storage system |
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| CN101009442A CN101009442A (en) | 2007-08-01 |
| CN101009442B true CN101009442B (en) | 2012-06-27 |
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| CN2006100046335A Expired - Fee Related CN101009442B (en) | 2006-01-26 | 2006-01-26 | Symmetric sound coil motor combination and its assembly method and micro hard disk storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621230B (en) * | 2008-07-01 | 2012-01-25 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor assembling jig |
| CN101635498B (en) * | 2008-07-22 | 2012-06-20 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor assembly jig |
| CN101728920B (en) * | 2008-10-31 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor assembling tool |
| CN110825183B (en) * | 2019-11-04 | 2021-01-26 | 广州科技职业技术大学 | Industrial control computer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710644A (en) * | 2004-06-18 | 2005-12-21 | 新科实业有限公司 | Magnetic disk drive and method of manufacturing the same |
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2006
- 2006-01-26 CN CN2006100046335A patent/CN101009442B/en not_active Expired - Fee Related
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710644A (en) * | 2004-06-18 | 2005-12-21 | 新科实业有限公司 | Magnetic disk drive and method of manufacturing the same |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-338144A 2003.11.28 |
| JP特开平6-168351A 1994.06.14 |
| JP特开平6-46555A 1994.02.18 |
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| JP2007202394A (en) | 2007-08-09 |
| CN101009442A (en) | 2007-08-01 |
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