CN1815619A - Magnetic storage device for preventing falling damage and electronic product having same - Google Patents
Magnetic storage device for preventing falling damage and electronic product having same Download PDFInfo
- Publication number
- CN1815619A CN1815619A CN 200510007325 CN200510007325A CN1815619A CN 1815619 A CN1815619 A CN 1815619A CN 200510007325 CN200510007325 CN 200510007325 CN 200510007325 A CN200510007325 A CN 200510007325A CN 1815619 A CN1815619 A CN 1815619A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- disc body
- electric energy
- magnetic disc
- processing unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
The disclosed magnetic storage device includes an electric energy conversion unit, a magnetic disk body and a circuit protection module. The disk body is supplied by the electric energy conversion unit. The circuit protection module includes an acceleration sensor, a processing unit, and a diverter switch. Being in sensing condition falling down disk body, the acceleration sensor outputs a detected signal. The processing unit is connected to the acceleration sensor, the energy conversion unit, and the disk body. Receiving driving from the processing unit, the diverter switch is in use for turning on/off a power supply loop between the conversion unit and the disk body. If determining signal of acceleration sensor is larger than a threshold, the processing unit turns the switch to off to cut off the power supply loop. Thus, power supplied for the magnetic disk body is interrupted instantly in order to prevent the magnetic disk body from harm caused by falling down from high place.
Description
Technical field
The present invention relates to a kind of storage device, particularly relate to a kind of the prevention and drop the magnetic storage that causes damage and have the mobile electronic product of this device from eminence.
Background technology
At present very in fashion as mobile electronic products such as MP3 player and intelligent mobile phones, in order to store for example music, a large amount of digital dates such as image archives or video signal, its hard disc of installing is because palpus cooperates the design towards miniaturization, thereby the generation of microdrive arranged, known have a for example iPod numerical digit walkman of Apple Computers, have this microdrive in the video camera that JVC company produces is equal, this is because the volume of microdrive is little, capacity is big, can provide the portable type product greatest storage area, iPod Mini with Apple Computers is an example, just keep the microdrive of a 4GB capacity in the slight volume, the melody quantity that can store therefore can be up to more than 1000 head.
As shown in Figure 1, general hard disc device 9 includes a pedestal 91 usually, one or the disk 92 of many groups position on pedestal 91, one is positioned at the axle center motor 93 (Spindlemotor) of disk 92 central authorities, an one drive coil unit 94 and a reading-writing arm group 95, wherein, this reading-writing arm group 95 has a cantilever 951 (Arm) and is fixed on the multi-disc read/write head 952 (Magnetichead) of these cantilever 951 front ends, if disk 92 numbers are most, then each disk 92 just is assigned one group and is disposed at respectively on the disk 92, the read/write head 952 of below, and drive the data that read/write heads 952 read disk 92 each magnetic surface by this cantilever 951; In addition, general hard disc device 9 also is provided with a stop face (figure does not show) in disk 92 sides, this stop face can provide read/write head 952 to put thereon still, and disk 92 is avoided by the harm of read/write head 952 scratches.
The data of disk 92 on magnetic surface is archives to be divided into multistage store, cantilever 951 is can constantly move and read each section data of disk 92 on magnetic surface back and forth through the driving of drive coil unit 94, because read/write head 952 adopts electromagnetic induction principle and swims on the disk 92 with air-flow, therefore read/write head 952 need not contact with disk 92 surfaces and can carry out reading of great mass of data apace, so disk 92 must be smooth smooth, and its surface must keep suitably erroneous judgement and the damage of distance to avoid data with read/write head 952.
Because hard disc device 9 is a mechanical realization, no matter be to run up or when on the shelf, any external force improperly or drop all and might cause physical injury, especially more strict for the requirement of the resistance to impact that is installed in the microdrive in the mobile electronic product, for the employed technology of the resistance to impact that improves the microdrive in the mobile electronic product roughly has two kinds: a kind of is to select the buffering material that can absorb impulsive force for use, another kind then be when hard disc device 9 in when action, in the mode of detecting speed at suitable moment interruption of power supply, the possibility of reduce impacting as far as possible.
Yet the protection mode of hard disc device 9 has following problems at present:
1. for first kind of technology, technology commonly used at present is to stick padded coaming in the periphery of microdrive, in order to absorb impulsive force, if want protection higher because of dropping hurtful height, the padded coaming thickness that then need use then must thicken, the volume of hard disc device 9 is increased, and for example the protective layer made from the rubber material is coated on the outer peripheral edges of this hard disc device 9, and thickness 5mm only can resist the impulsive force about about 240G.
2. for second kind of technology, be to adopt acceleration induction element (G-sensor) at present, just when machine drops, can utilize the acceleration induction element to be detected, make the machine arrival point can stop the read-write motion of hard disc read/write head in front, with hard disc device 9 is example, after detecting situation about dropping, be the 8 bit address bus (8-bit Address Bus) (figure does not show) of ATAPT in the IDE interface for example to assign instruction and make reading-writing arm group 95 and disk 92 suspend running in order to avoid damage disk 92, and to assign the needed time of instruction longer from detecting in this way.
3. when common people use mobile electronic products such as mobile phone or MP3 player; often be that mobile phone is pressed close to ear; perhaps the MP3 player is placed in the pocket and listens to melody with earphone; just apart from the place of the about 1-1.5 meter in ground; therefore; if will protect with hard disc device 9 is that the mobile electronic product of storage device is unlikely to fall at above-mentioned height and causes damage, just must can overcome this impact highly, can satisfy consumer's actual demand.
Description of drawings
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is a stereographic map, and each parts that general hard disc device has are described;
Fig. 2 is a circuit block diagram, illustrates that the present invention can prevent to drop a preferred embodiment of the magnetic storage of damage;
Fig. 3 is a synoptic diagram, illustrates in this preferred embodiment, and magnetic storage produces the anglec of rotation of Θ along the Z axle;
Fig. 4 is a synoptic diagram, illustrates in this preferred embodiment, and the mobile electronic product with this magnetic storage falls a segment distance H
2, and distance H
2Less than the height H of magnetic storage script apart from ground
1, magnetic storage just can be powered and decommission fully in the way that falls.
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to graphic (annotate: there have several embodiment just to write to be several) preferred embodiment, can clearly present.
As shown in Figure 2, the present invention can prevent that the magnetic storage 1 of dropping damage can be installed in the mobile electronic product (figure does not show), and this mobile electronic product can be that wherein any is available for users to store the electronic product of various video/audio archive or digital date to devices such as notes computer, a MP3 music player and a mobile phone.
The magnetic storage 1 that the present invention can prevent to drop damage is in the body (figure does not show) that is installed in this mobile electronic product, and include a magnetic disc body 100 and an electric energy converting unit 101, and between magnetic disc body 100 and electric energy converting unit 101, be provided with circuit protection module 10.In addition, in order to reach best protection effect, magnetic storage 1 more comprised one with padded coaming (for example: the rubber material) protective layer of making (figure does not show), this protective layer is the outer peripheral edges that are coated on this magnetic disc body 100, about the about 1.5-2mm of thickness.
Wherein, electric energy converting unit 101 is converted to the required electric energy form of each parts in the magnetic storage 1 in order to the electric energy that an external power source is discharged, for example: electric energy converting unit 101 can be with outside supply of electrical energy, for example the 3.7 volts of step-downs of supplying of 5 volts of switching device (Adapter) supply or internal cell are after galvanic current is pressed 3.3 volts, the required electric energy forms of element such as a processing unit 102 that can have in order to supply magnetic disc body 100 and circuit protection module 10.
Magnetic disc body 100 mainly has a magnetic record unit 120 in order to the record data, reach one in order to read/to write the read write device 140 of data from magnetic record unit 120, the Storage Media of this type includes hard disc device, DVD read-write equipment, CD CD read/write device, or other kinds drop the data storage device that easily damages etc. by magnetic record, to vibrations or from eminence, are applicable to that all the present invention can prevent to drop the design concept of damage.
In the present embodiment, this magnetic disc body 100 is a hard disc device (Hard Disk), therefore still have a pedestal 11, and be positioned at the axle center motor 13 of magnetic record unit 120 central authorities, and read write device 140 has the read/write head 16, that a drive coil unit 14, a cantilever 15, be fixed on these cantilever 15 front ends and stops seat 17 and one hard disc basic building blocks such as transmission interface 18 that are located on the pedestal 11.Because above-mentioned hard disc basic building block and principle are present known technology, and are not emphasis of the present invention, therefore no longer described in detail, below will only explain with regard to the element that is relevant to notion of the present invention.
The present invention can prevent to drop in the magnetic storage 1 of damage, circuit protection module 10 be bridge joint between electric energy converting unit 101 and magnetic disc body 100, and circuit protection module 10 has a processing unit 102, and switches switch 103 and and quicken detector 104.
Wherein, processing unit 102 is electrically connected electric energy converting unit 101, the transmission interface 18 of magnetic disc body 100 and acceleration detector 104, processing unit 102 is except the power supply supply of may command electric energy converting unit 101 normal machine open/closes, and can control magnetic disc body 100, be the rotating speed that interface carries out Control Shaft core motor 13 for example with data transmission bus-bar (Data Transmission Bus), the controller of drive coil unit 14 (figure does not show) start, for reading/write control actions such as data from magnetic record unit 120, and decision whether continue the to power keying functions such as (repeating after the appearance) of the control its switch 103 of giving magnetic disc body 100.
Change-over switch 103 is electrically connected between magnetic disc body 100, electric energy converting unit 101 and the processing unit 102, it can be the wherein arbitrary type electric crystal of a PNP and FET, the change-over switch 103 of present embodiment is to use a positive-negative-positive electric crystal, drive to open and close a current supply circuit 105 in order to accept processing unit 102, this current supply circuit 105 is loops that bridge between electric energy converting unit 101, the magnetic disc body 100.
Wherein, the base stage of this electric crystal (B) is electrically connected on the GPIO control pin of processing unit 102, and the collection utmost point (C) of electric crystal then is electrically connected on magnetic disc body 100, and the voltage that electric energy converting unit 101 produces then loads on the emitter-base bandgap grading (E) of electric crystal; When the GPIO of processing unit 102 control pin did not have any voltage to export, the current supply circuit 105 that then bridges between electric energy converting unit 101, the magnetic disc body 100 was conducting, and electric crystal is then by the collection utmost point (C) output voltage supply magnetic disc body 100 power supplys; Suppose that processing unit 102 is judged and to stop power supply, then control voltage by the GPIO control pin output one of processing unit 102, so just can cause the current supply circuit 105 that bridges between electric energy converting unit 101, the magnetic disc body 100 to be not conducting, and then make magnetic disc body 100 be compelled to interrupt its energy source.
This acceleration detector 104 is one can respond to that three (X, Y, Z) anglecs of rotation change and the gravity of output induced voltage signal quickens detector (Gravitational acceleration sensor), and in the present embodiment, quickening detector 104 is to use three gravity to quicken detector, roughly be arranged at a substrate (figure does not show) central part that circuit protection module 10 has, on the substrate and be provided with elements such as this processing unit 102 and change-over switch 103; Quickening detector 104 exports one and quickens to detect signal in order to dropping of induction magnetic disc body 100, and in the present embodiment, this acceleration detects the anglec of rotation that signal is three of inductions and the voltage signal that produces changes, this voltage signal is changed the Analogue-to-digital Converter (ADC) (A/DConverter) 110 that the form input processing unit 102 with analog signal has, be converted to digital signals by this analogy digital converter 110, again the basis for estimation dropped by eminence as whether of a threshold value of setting according to internal system by processing unit 102.
Present known protection mode; be to judge that three gravity quickens to change if the situation that is higher than this threshold value is arranged; just exporting vibrations (Shock) detects signal (figure do not show) and carries out emergency treatment to drive processing unit 102; for example make read write device 140 suspend the running action of magnetic record unit 120 being read/writing data; yet; but this kind safeguard procedures are in the no doubt temporary protection of small size shock conditions; but for example apart from the eminence of the about 1-1.5 meter in ground; because machine is still under the situation that continues power supply, will cause heavy losses to machine itself unavoidably.
In the present embodiment, when magnetic disc body 100 produces the anglec of rotation because of dropping, the acceleration that processing unit 102 is exported by reception acceleration detector 104 detects signal, judge that whether this acceleration detects signal greater than a threshold value, if greater than this threshold value, processing unit 102 just drives change-over switch 103 and makes current supply circuit 105 not conductings between electric energy converting unit 101 and the magnetic disc body 100; Then, give the controller of drive coil unit 14 (figure does not show) owing to can't continue power supply from this transmission interface 18, the magnetic buoyancy of drive coil unit 14 disappears, make the read/write head 16 of cantilever 15 and front end thereof be returned to automatically to stop on the seat 17 and avoid damaging magnetic record unit 120 and read/write head 16, reach protection magnetic storage 1 and drop the damage that may cause from eminence magnetic record unit 120.
Learn through experiment, when magnetic storage 1 produces the anglec of rotation because of dropping, acceleration detector 104 on the magnetic disc body 100 can output quicken to detect signal, wherein the arbitrary axle in three on the X that senses, Y or the Z axle will have bigger angle and change, and processing unit 102 whether are voltage signals of being produced according to any angle variation of these accelerations detector 104 inductions make greater than this threshold value whether decision of interruption of power supply.
With Fig. 3 is example, and cooperate Fig. 2 that above-mentioned principle is described, suppose to produce along the Z axle anglec of rotation of Θ when magnetic storage 1, because the difference according to each anglec of rotation can make the corresponding different change in voltage that produces, therefore anglec of rotation Θ just makes and quickens the bigger voltage signal of detector 104 corresponding outputs, and three change in voltage all can be recorded in the mode of digitisation signal, thus, the digital signals that is sampled in the partial continuous of Z axle repeats repeatedly (for example: more than 5 times) all the situation that is higher than threshold value, and then processing unit 102 just can be made the decision of interruption of power supply in view of the above.
Cooperate shown in Fig. 2,4, suppose that magnetic storage 1 that the present invention can prevent to drop damage is installed in the body 31 that a mobile electronic product 3 has, mobile electronic product 3 is H apart from the height on a ground 4
1The time, required time is S
1, then falling midway, be assumed to be and fall a segment distance H
2, and distance H
2Height H less than distance ground
1, then only take time less than time S
1Time S
2Magnetic storage 1 just can be powered and decommission fully.
By experiment as can be known, suppose to have the height H of the mobile electronic product 3 of magnetic storage 1 apart from ground 4
1During for 1m, in the way that then falls, this distance H just
2When 30 centimeters left and right sides, the time S that entire reaction spent
2About 200ms, this moment, the processing unit 102 of magnetic storage 1 can be made the decision of interruption of power supply immediately, not only make magnetic disc body 100 close power supply at once and stop access action, and the read/write head 16 of cantilever in the magnetic disc body 100 15 and front end thereof also has been returned to stop and has made magnetic record unit 120 avoid damage on the seat 17, and the whole tolerance of magnetic storage 1 also can reach about 2000G behind the interruption of power supply.
Conclude above-mentioned because the present invention can prevent that the magnetic storage 1 of dropping damage has following advantage:
The present invention by judge to quicken detector 104 whether respond to voltage signal that arbitrary anglec of rotation produces greater than system thresholds, come the power supply of the controller of hard closing magnetic disc body 100 and drive coil unit 14, because magnetic storage 1 is in non-running (Nor-Operating) state behind the interruption of power supply, make its whole tolerance can reach about 2000G, comparing does not have the about 200G of tolerance that inductor is set and keeps power supply (Operating) state in the past and has promoted several times; Or the mode that inductor is set is arranged compared to other; owing to be to retract cantilever 15 and read/write head 16 in the mode that ATAPT address bus in the IDE face gives an order; about 300-400ms of the time that it spent; the present invention judges the emergency circumstance that falls; only need 20-50ms just can finish all protection actions (cutting off the power supply, retract cantilever 15 and read/write head 16), reaction velocity has also been accelerated several times.
2. the present invention opens and closes when giving hard disc body 100 with interruption of power supply by processing unit 102 control its switch 103, because interruption of power supply is given the cause of the controller of drive coil unit 14, the action that makes the action of a magnetic field of drive coil unit 14 disappear and carried out can't keep power supply the time, and then force the cantilever 15 of read write device 140 and the read/write head 16 of front end thereof to be displaced to the side of magnetic record unit 120, thereby avoid greatly dropping the harm that ground may be caused from eminence in order to avoid damage this magnetic record unit 120 and read/write head 16.
3. the present invention has the outer peripheral edges that a protective layer is coated on this magnetic disc body 100, cooperate above-mentioned 1., factor 2., the thickness of protective layer need not increase outside the thickness, still can reduce thickness to the 1.5mm, make the unlikely increase again of peripheral volume of product, therefore can satisfy consumer's actual demand.
Claims (8)
1. magnetic storage that can prevent to drop damage, this magnetic type storage device comprises an electric energy converting unit and a magnetic disc body, this electric energy converting unit is converted to the required electric energy form of each parts in this magnetic storage in order to the electric energy that an external power source is discharged, this magnetic disc body is by this electric energy converting unit power supply, have one in order to the magnetic record unit of record data and in order to this magnetic record unit certainly to read/to write the read write device of data, it is characterized in that: this magnetic type storage device also comprises circuit protection module, between this circuit protection module this electric energy converting unit of bridge joint and this magnetic disc body, and this circuit protection module has:
One quickens detector, exports one and quickens to detect signal in order to respond to the situation that this magnetic disc body drops;
One processing unit is electrically connected this acceleration detector, this electric energy converting unit and this magnetic disc body, in order to this magnetic disc body is controlled; And
One switches switch, is electrically connected on this processing unit, this electric energy converting unit and this magnetic disc body, drives to open and close the current supply circuit between this electric energy converting unit and this magnetic disc body in order to accept this processing unit;
When this magnetic disc body is dropped, if this processing unit receives acceleration that this accelerations detector exports and detects signal and judge when this acceleration detects signal greater than a threshold value, then this processing unit drives this change-over switch and closes and make this not conducting of current supply circuit, gives this magnetic disc body in order to interruption of power supply at once and drops the harm that causes with prevention from eminence.
2. the magnetic storage that prevents to drop damage as claimed in claim 1 is characterized in that:
This acceleration detector is that three gravity quickens detector.
3. the magnetic storage that prevents to drop damage as claimed in claim 1 is characterized in that:
This processing unit judges whether to drop from eminence, is to respond to any angle according to this acceleration detector whether to change the voltage signal that produced greater than this threshold value.
4. the magnetic storage that prevents to drop damage as claimed in claim 1 is characterized in that:
This change-over switch is the wherein arbitrary type electric crystal of a PNP and FET.
5. the magnetic storage that prevents to drop damage as claimed in claim 1 is characterized in that:
This magnetic disc body has more a transmission interface, when this processing unit gives this hard disc body at this electric energy converting unit interruption of power supply of control, also give this read write device in the mode of stopping power supply, make this read write device move to the side of magnetic record unit automatically because of magnetic buoyancy disappears in order to avoid damage this magnetic record unit via this transmission interface.
6. the magnetic storage that prevents to drop damage as claimed in claim 1 is characterized in that:
This magnetic storage also comprises a protective layer made from padded coaming, and this protective layer is the outer peripheral edges that are coated on this magnetic disc body.
7. mobile electronic product, this mobile electronic product comprises a body and a magnetic storage, this magnetic type storage device comprises an electric energy converting unit and a magnetic disc body, this electric energy converting unit is converted to the required electric energy form of each parts in this magnetic storage in order to the electric energy that an external power source is discharged, this magnetic disc body is by this electric energy converting unit power supply, have one in order to the magnetic record unit of record data and in order to this magnetic record unit certainly to read/to write the read write device of data, it is characterized in that: this magnetic type storage device also comprises the circuit protection module between this electric energy converting unit of a bridge joint and this magnetic disc body, and this circuit protection module has:
One quickens detector, exports one and quickens to detect signal in order to respond to the situation that this magnetic disc body drops;
One processing unit is electrically connected this acceleration detector, this electric energy converting unit and this magnetic disc body, in order to this magnetic disc body is controlled; And
One switches switch, is electrically connected on this processing unit, this electric energy converting unit and this magnetic disc body, drives to open and close the current supply circuit between this electric energy converting unit and this magnetic disc body in order to accept this processing unit;
When this magnetic disc body is dropped, if this processing unit receives acceleration that this accelerations detector exports and detects signal and judge when this acceleration detects signal greater than a threshold value, then this processing unit drives this change-over switch and closes and make this not conducting of current supply circuit, gives this magnetic disc body in order to interruption of power supply at once and drops the harm that causes with prevention from eminence.
8. mobile electronic product as claimed in claim 7 is characterized in that:
This mobile electronic product is that wherein any can be for the electronic product that stores digital date for a notes computer, a music player and a mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510007325 CN1815619A (en) | 2005-02-04 | 2005-02-04 | Magnetic storage device for preventing falling damage and electronic product having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510007325 CN1815619A (en) | 2005-02-04 | 2005-02-04 | Magnetic storage device for preventing falling damage and electronic product having same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1815619A true CN1815619A (en) | 2006-08-09 |
Family
ID=36907750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510007325 Pending CN1815619A (en) | 2005-02-04 | 2005-02-04 | Magnetic storage device for preventing falling damage and electronic product having same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1815619A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102596489A (en) * | 2010-02-04 | 2012-07-18 | 小池酸素工业株式会社 | Mobile workbench |
| CN102053689B (en) * | 2009-11-11 | 2014-02-26 | 技嘉科技股份有限公司 | Computer device and optical disk drive-type battery |
-
2005
- 2005-02-04 CN CN 200510007325 patent/CN1815619A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053689B (en) * | 2009-11-11 | 2014-02-26 | 技嘉科技股份有限公司 | Computer device and optical disk drive-type battery |
| CN102596489A (en) * | 2010-02-04 | 2012-07-18 | 小池酸素工业株式会社 | Mobile workbench |
| CN102596489B (en) * | 2010-02-04 | 2015-03-25 | 小池酸素工业株式会社 | Mobile workbench |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100399424C (en) | Disk drive for quickly retracting head to retract area, and emergency head-unload control circui | |
| US7689785B2 (en) | Digital device configuration and method | |
| CN1801372A (en) | Device for operating a hard disk drive of a mobile communication terminal during impact and a method thereof | |
| US7450332B2 (en) | Free-fall detection device and free-fall protection system for a portable electronic apparatus | |
| US7558013B2 (en) | Programming a sensitivity level into an inertial sensor based on a proxy of whether a system is in transit | |
| US20060215299A1 (en) | Shock-resistant magnetic storage medium for a portable electronic device | |
| CN105229555A (en) | The operation of mass-memory unit | |
| CN1815619A (en) | Magnetic storage device for preventing falling damage and electronic product having same | |
| US20070030586A1 (en) | Apparatus and method for hard disk protection | |
| CN1881419A (en) | Portable electronic apparatus capable of operating in accordance with sensed pressure | |
| CN100399425C (en) | Hand disk circuit breaking protection device and method | |
| CN201838319U (en) | Portable equipment with electronic control system | |
| KR100650517B1 (en) | Shock-resistant magnetic storage medium for a portable electronic device | |
| US9218837B2 (en) | Control of storage device | |
| CN2899037Y (en) | Storage unit with power-off protecting function and its control connector | |
| KR20060121368A (en) | Apparatus and method for shock detecting using acceleration sensor | |
| CN2831327Y (en) | Falling protective system for hard disk | |
| KR20060048625A (en) | Protecting mechanism and method for read- write medium device | |
| JP4308116B2 (en) | Data playback device | |
| US20090262459A1 (en) | Slider of a hard disk drive and hard disk drive having the same | |
| JP2006260684A (en) | Magnetic recorder and electronic device equipped with the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |