CN2590129Y - Mini disk drive - Google Patents

Abstract

The utility model relates to a mini disk driving device which comprises a disk for recording and copying information, wherein, the range of the diameter of the disk is 45-50 mm. The mini disk driving device comprises a shell body. The length of the shell body is 70 mm. The width of the shell body is 51 mm. The shell body is composed of an outer sleeve sealing and installing structure which is made of elastic damping materials. The mini disk driving device comprises a rotary actuator which is used for rotating the disk. The motor comprises a stator and a rotor. The stator receives the disk, and enables the disk to rotate around a first rotating shaft. One of the stator and the rotor is provided with magnetic poles. The other one is provided with at least a set of coil structures. Each of the coil structures comprises two coil parts. When current is supplied to each of the loop structures, one of the coil parts drives the rotor relatively to the stator. When the current of each of the coil structures is turned off, a first coil part and a second coil part are simultaneously used for generating reversal electromotive forces.

Description

The minidisk drive unit

[technical field]

The utility model relates to a kind of disk drive, particularly is applicable to the minidisk drive unit of hand held, handheld or pocket-size computing machine.

[background technology]

Along with reducing of computer equipment size, more small-sized disk drive produces accordingly, satisfies the demand that the computer device size reduces.A kind of hard disk drive comprises one 3.5 cun hard disk, and this installs at United States Patent (USP) the 4th, 568, No. 988 exposure to some extent.This patent has been described a Winchester disk driver that uses diameter range as 3.5 cun magnetic discs of 85-100 millimeter, and the recording density of this driver is every foot 600 tracks, uses the open loop servo-drive system.When formative the time, can provide the nearly memory capacity of 5 megabyte of every dish.This patent has also disclosed the use of rotary actuator, and this actuator passes through belt-driven by stepper motor.

The development that reduces also to have caused 2.5 cun hard disk drives of computer device size.Similarly hard disk drive is at United States Patent (USP) the 4th, 933, is described in No. 785.It is 2.5 cun hard disks that this drive unit uses two diameters, and uses rotary actuator to decide the position of write head on magnetic track.The track that above-mentioned magnetic disc drives is described to 2.8 cun * 4.3 cun, that is to say, the housing that is used to encapsulate hard disk drive is 2.8 cun wide 4.3 cun long.The hard drive of common this size is applied to be of a size of 8.5 cun * 11 cun * 1 cun computing machine.Along with computing machine becomes more and more littler, for example, hand held, handheld or pocket-size computing machine, how a kind of hard disk drive littler than previously described size is provided is necessary.

[summary of the invention]

The purpose of this utility model is to provide the minidisk drive unit that a kind of volume is little, in light weight, be suitable for hand held, handheld or handle PC.

The purpose of this utility model can be realized by following technical scheme: a minidisk drive unit comprises the magnetic disc of a record and Copy Info, and the diameter range of described magnetic disc is the 45-50 millimeter; It is 51 millimeters housing that length is about 70 millimeters width, and described housing is to be made of the overcoat encapsulating structure that the elasticity packing is made; A rotation motor that is used to rotate magnetic disc, described motor comprises a stator and a rotor, described stator is accepted magnetic disc and magnetic disc is rotated around first rotating shaft, there is one in described stator and the rotor and has magnetic pole, another has at least one group of loop construction, described loop construction comprises two coiler parts, when electric current offers loop construction, one of them coiler part drives rotor with respect to stator, when the electric current of loop construction was cut off, first and second coiler parts were used to produce inverse electromotive force simultaneously; A rotary actuator is used for fixing the read/write transducers on magnetic disc surface, and described sensor is by the magnetic arm support of disk set; Described minidisk device also comprises an inertia lock, is used for preventing when disc driver is subjected to rotary power the actuator rotation.The minidisk device is included in each magnetic track an embedded servo zone, and the length difference of described servo area can increase information storage at every tracks.

The utility model is compared with prior art: magnetic head magnetic disc assembly has a housing, can protect the element in the magnetic head magnetic disc assembly apparatus not to be subjected to contamination by dust, causes the magnetic head damage; The housing of magnetic head magnetic disc assembly is wide to be about 50.8 millimeters, and being about is 70 millimeters, can hold the hard disk that a diameter is about 48 millimeters, and in the two sides of hard disk recorded information, it is 11.5 million to 23,000,000 spaces that a memory capacity is provided, and increases the memory capacity of hard disk; By dish driver and controller are arranged on the independent circuit board, can reduce pin and reduce the volume of magnetic disc driver, Jin Cou size dish driver and controller circuit board that magnetic disc and it are associated can be applied on hand held or the handle PC like this; By having the rotation motor of coil on the rotor, can reduce the startup power supply of motor, thereby make disc driver need very low operating power, reduce the power consumption of hand held or handle PC.

[description of drawings]

The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is the vertical view of hard disk drive and the circuit board that comprises a driver and an electronic controller that is associated with it.

Fig. 2 is the driver shown in Fig. 1 2-2 direction along the line and the cut-open view of circuit board.

Fig. 3 is the side view of the magnetic head magnetic disc assembly shown in Fig. 1 3-3 direction along the line.

Fig. 4 is the vertical view of magnetic head magnetic disc assembly and driving governor circuit board.

Fig. 5 is the magnetic head magnetic disc assembly of Fig. 4 5-5 direction along the line and the view of drive circuit board.

Fig. 6 is the vertical view of a magnetic head magnetic disc assembly that amplifies, and wherein, the device big envelope removes, and magnetic head is in unloaded state.

Fig. 7 is the vertical view that removes the magnetic head magnetic disc assembly of big envelope, and wherein, magnetic arm is in from magnetic disc reading writing information state.

Fig. 8 is the cross section view of the magnetic head magnetic disc assembly shown in Fig. 1 8-8 direction along the line.

Fig. 9 is the vertical view that is used for the rotary actuator of magnetic head magnetic disc assembly.

Figure 10 is used for the slider of magnetic head magnetic disc assembly and the view of supporter.

Figure 11 is the vertical view that the dynamic loading magnetic disc drives, and has showed the relative position relation of rotary actuator and inertial lock storage.

Figure 12 A, 12B are the position relations of rotary actuator and inertial lock storage, and wherein, latch is in the state of loading and unloading respectively.

Figure 13 is legend inclined-plane shown in Figure 11 and the side view of relevant element.

Figure 14 is the vertical view of the hard disk drive that combines with dynamic magnetic head loading attachment.

Figure 15 A is used for obtaining in the support of head universal joint device slider being rotated in the forward topology view.

Figure 15 B is used for obtaining the reverse rotation topology view in the support of head universal joint device slider.

Figure 15 C is used for obtaining non-rotary topology view in the support of head universal joint device slider.

Figure 16 is that slider is in the Status view when being rotated in the forward.

Figure 17 is the Status view of slider when being in reverse rotation.

Figure 18 is respectively that slider is in the Status view when not rotating.

The constitutional diagram of the diverse location when Figure 19 is a head universal joint shown in Figure 14 along with corresponding cam rotation.

Figure 20 is the diagrammatic sketch of the cross section of device 46-46 along the line shown in Figure 19.

[embodiment]

Please refer to Fig. 1, this figure show magnetic head magnetic disc assembly 1, the dish driver that is associated with it and controller circuit board 2 and be connected magnetic head magnetic disc assembly 1 and dish driver and controller circuit board 2 between flexibly connect line 3.By dish driver and controller are arranged on the independent circuit board, can reduce the volume of pin and minimizing magnetic disc driver.Magnetic head magnetic disc assembly 1 is wide to be about 50.8 millimeters, and being about is 70 millimeters, thickly is about 10 millimeters.Be the housing that uses above-mentioned size on 45 millimeters to 55 millimeters the hard disk at a diameter range, and in the two sides of hard disk recorded information, it is 11.5 million to 23,000,000 spaces that a memory capacity is provided.Jin Cou size dish driver and controller circuit board that magnetic disc and it are associated can be applied on hand held or the handle PC like this.

The acquisition of high storage capacity is by using independent servo area at embedded servo system.In order to increase the capacity of storage, magnetic disc driver and controller need very low operating power, and described low operating power is to realize by the rotation motor that has coil on the rotor.When rotation motor is given the power supply of magnetic disc driver, a coiler part action is only arranged in the coil.When the power supply of driver is cut off, two coiler parts are just by continuous coupling together, the reverse EMF signal actuate actuators coil that produces 40 unload magnetic head from magnetic disc, minimizing is with the size of magnetic head needed startup power supply when the magnetic disc surface is left.Because the battery size of small-size computer is little and capacity is low, so above-mentioned power storage feature also is to be applicable on the small-size computer.

Driver and controller circuit board 2 can be installed on computers according to direction illustrated in figures 1 and 2, if chamfered portion is seldom described, can use Fig. 4 and direction shown in Figure 5.Fig. 5 shows is magnetic head magnetic disc assembly 1 and driving and controller circuit board 2 view along the 5-5 direction among Fig. 4, and on this direction, the thickness shown in Fig. 5 is about 15 millimeters.What be used for that signal electron connector that main frame sends signal uses is connector 4.

In Fig. 1, connector 4 is standby connectors.At Fig. 2, the pin 5 of connector 4 extends out from the side of circuit board 6.With controller circuitry loop details of use detailed description will be arranged hereinafter in the magnetic disc driving.As shown in Figure 2, magnetic head magnetic disc assembly 1 has a housing, and this housing comprises lid 7 and matrix 8.The intraware of lid 7 and matrix 8 and magnetic head magnetic disc assembly 1 will have detailed description hereinafter.

Please refer to Fig. 3, there is the thickness of a reduction on the right of lid 7 and matrix 8.Because reducing of matrix 8 thickness in order to support extra stability, used support 9.

Magnetic disc driving use of the present utility model has 23,000,000 the single magnetic disc of data storage capacity.In following table, be the used major parameter of disc driver of the present utility model.

Each driver (million) 11.5 23.0 each magnetic track of form (byte) 11,776 23,552 of version 1 version 2 capacity

Each sector (byte) 512 512

Each magnetic track 23 23 of sector

(OD) 23 46 function recording densitys (BPI) 38,100 46,400

Variable density (FCI) 28,600 34,800

Areal concentration 56 86

Magnetic disc 11

Data head 22

Data cylinder 480 610

Track density (TPI) 1,486 1,857

Recording method 1,71,7 performance medium transmission rates 0.92 1.84

Interface transfer rate 4.0 4.0

Rotational speed 3,490 3,490

Time delay 8.6 8.6

Average hunting time 29 29

Seek time 88

Maximum hunting time 40 40

Start-up time (typical case) 1.5 1.5

Buffer size 32 32

Interface A T/XT AT/XT power supply+5VCD ± 5% starting current 0.8Amps

Typical case's heat radiation power 3.5watts

Idle running 1.0watts

Read/write/searching 0.5watts

Power storage pattern 0.5watts

Standby mode 0.03watts

Park mode 0.01watts

Please refer to Fig. 6 and Fig. 8, shown in Figure 6 is the amplification plan view of the magnetic head magnetic disc assembly 1 after lid 7 is removed.Magnetic head magnetic disc assembly 1 uses a single hard disk 16, and this hard disk 16 has the coating plane surface of a magnetic material, is used for record and backup data information.The overall diameter of hard disk 16 is about 48 millimeters, and interior diameter is about 12 millimeters, and it comprises an aluminium dish, and this aluminium dish has one deck to be fit to the magnetisable coating of plane surface up and down.Hard disk 16 is that this rotation is provided by non-electric brush type direct current rotation motor in the rotation of matrix 8 upper supports.This non-electric brush type direct current rotation motor comprises a motor, and this motor has nine laminate patches 17, and each laminate patch all has a coil 18.Stationary part is supported on the matrix 8.Rotor 19 being attached in the rotating shaft 20 tightly, this rotating shaft 20 utilizes a bearing arrangement 21 to support by matrix 8.Permanent magnet ring 22 is supported by one group of laminate patch 17 and coil 18 co-operate relation.Permanent magnet ring 22 is supporting than lower part 23 by rotor 19 also.Hard disk 16 is supported rotation by rotor 19, and clamp ring 24 tightly is stuck on the rotor 19.

Portable small-sized computer power supply capacity is limited, in order to reduce the power consumption of magnetic head magnetic disc assembly 1, uses the dynamic loading magnetic head with the static friction between elimination write head slider and magnetic disc, thereby reduces the startup power supply of motor.Dynamically magnetic head loads and allows unlimited startup-stop capacity, so just can reduce power consumption by using cut off the power supply at once afterwards.With reference to Fig. 6, what Fig. 6 showed is read/write write head and its slider that is in hold mode that is associated of magnetic head magnetic disc assembly 1, and this slider is used for supporting the peripherals of hard disk 16.The load pillar 28 of head universal joint 29 is round the center rotation of rotating shaft 30, and load pillar 28 is being supported its free end, and is connected on the hard disk 16.Slider 31 comprises a read/write recording element.A short and small projection 32 is arranged on the load pillar 28, and this projection 32 has a free end 33 that is connected cam gear 35 surfaces 34.

Please referring to Fig. 8, what Fig. 8 showed is the cross-view that load pillar 28 upper parts use, and this part is supported bottom slider 31; Fig. 8 has also showed upper load pillar 36, and this part is being supported top slider 37.Here used " top ", " bottom " term are that the direction of operating when using is named.For example, bottom slider 31 is that expression read/write recording element is that the surface is downward in view.

Upper load pillar 28 and following section load pillar 36 are supported by actuator 38 and are rotated round the center of rotating shaft 30.Actuator 38 is rotated on matrix 8 by the bearings that is fit to, and this bearing arrangement comprises actuator bearing 39.What the mechanical hook-up of head portion used is the magnetic head magnetic disc assembly 1 of moving coil rotary actuator type.Actuator coil 40 is placed on the read/write recording element on the appropriate magnetic track according to appropriate driving signal.Permanent magnet 41 is connected with magnetic plane 42, oppositely plane 43 and provide a magnetic flux to pass to carry out coil 40, in order to reduce the weight of magnetic head magnetic disc assembly 1, utilize permanent magnet 41 to be connected with reverse plane 43 with magnetic plane 42.Physical form and the big fraction of carrying out coil 40 are determined by available space on the matrix 8.A part of carrying out coil 40 extends to the outside on reverse plane 43.From the angle of electronics, the rotating speed of coil 40 and the specification of electric wire are fixed, and the resistance of coil 40 and the resistance of rotation motor equate.Because power supply disconnects, the inverse electromotive force of rotation motor is used for driving carries out coil, and the magnetic head cam is placed unloaded state, is very important so set up the substitutional resistance relation.The Another reason of setting up equivalent resistance relation is a resistance value that size and the rotating speed when coil produced when equaling total resistance value that coil by two rotation motors adds that loop and track produced, and the geometry torques of given coil are maximum.

In order to protect the element in magnetic head magnetic disc assembly 1 device not to be subjected to contamination by dust, cause the magnetic head damage, lid 7 is encapsulated on the matrix 8, thereby suitable annexation is provided for lid 7, matrix 8 and elasticity sealing 44.Elasticity sealing 44 extends to the edge 45 of outside around the peripheral hardware of matrix 8, and the peripheral free edge 51 of lid 7 extends to the below of coboundary 45, so just can make matrix 8 and lid 7 that the part of overlapping is arranged.The read/write recording element that this overlapping structural benefit is to reduce magnetic disc head stack 1 inside is to the susceptibility from the EMI of outside.Lid 7 by the firm locking of a pair of securing member on matrix 8.On lid 7, there is corresponding opening 46 and 47 to admit these securing members.

When placed magnetic head cam gear position as shown in Figure 6, slider 37 that makes progress and downward slider 38 were placed face-to-face, and will cause extruding and damage on the slider to the concussion that magnetic disc drives transmission.In order to prevent the generation of this situation, use protection assembly 48, this protection assembly 48 and hard disk 16 are positioned at same plane, and are planar structures.

As shown in Figure 6, read/write integrated circuit 49 is included in 1 li of magnetic head magnetic disc assembly, and flexible connecting line 50 is used for transmitting signal from the read/write recording element.This line 50 also transmits signal to carrying out coil 40 simultaneously.

What Fig. 7 showed is that the read/write recording element is positioned at the operating position that is in respectively on hard disk 16 surfaces separately.Protection assembly 48 can clearly illustrate out in Fig. 7, equally, is positioned at reverse plane 43 following execution coils 40 and also can sees a part.When hard disk 16 rotations, Fig. 7 can also demonstrate the sense of rotation of hard disk 16.In order to understand the structure of actuator 38 and execution coil 40 better, please refer to Fig. 9, Fig. 9 is the upper end vertical view of actuator structure.As shown in Figure 9, actuator 38 comprises coil brace extension 54, and this part links together by bonding agent 55 and execution coil 40.Carry out coil 40 and comprise one group of insulated coil that twines, and a planar structure surperficial parallel with hard disk 16 is arranged.This coil is a truncate triangle, and the axle of coil is perpendicular with hard disk 16 surfaces.

Please refer to Figure 10, Figure 10 is the front view of magnetic head cam gear 61, and this magnetic head cam gear 61 comprises downward load pillar 28.Connecting line 56 provides the connection of an electronics for the read/write recording element.Figure 10 has also shown the columniform extension 57 on the stencil plane 59.This stencil plane 59 extends to is supporting load pillar 28 below the load pillar 28.Actuator 38 uses same support type to support the load pillar 36 on top.

Please refer to Figure 14, what Figure 14 showed is the vertical view of hard disk drive 1 .Hard disk drive 1 comprises hard disk 2 , and this hard disk 2 comprise a magnetisable coating that is used for writing down with copy data information.Hard disk 2 are by motor and stator structure support rotation.Anchor clamps 4 are clipped in hard disk 2 on axle center 5 of rotation motor.Hard drive 1 uses the stator actuator, and this actuator is the center rotation with rotor 7 .One suitable coil and permanent magnetism motor be positioned at permanent magnetism carry out motor reverse plane 8 below.Head universal joint device 9 are used for fixing actuator 6 and are center rotation with rotor 7 .Head universal joint 9 comprise the plane and leg-of-mutton load pillar 10 of a routine, and this load pillar 10 are supporting its free end slider 11 , and slider 11 comprise a read/write element.Head universal joint 9 comprise projection 12 , and it is made up of a stock, and this stock leans against the upper surface of load pillar 10 closely.As selection, projection 12 can form an integral body with load pillar 10 .Projection 12 can be positioned at the side of load pillar 10 , also can be positioned at the opposite side of center line 18 .Free end 13 and projection 12 associating supporting block 14 , it is positioned on matrix 13 .This cam gear also comprises cam face 15 , and the profile of this cam gear please refer to Figure 16.Load pillar 10 have a downward acting force, and this acting force keeps in touch free end 13 and cam face 15 .As Figure 14, Figure 19 and shown in Figure 20, the part of cam face 15 extends on the upper surface of hard disk 12 .Cam 14 are fixed on matrix 3 by a locked instrument.Adjustment on the direction that slit 17 permission cam 14 of forked type are marked in Figure 19.For this adjustment, normally allow slider have transformable placement location, thereby remedy the tolerance on the manufacturing process.Load pillar 10 can make by stainless steels thick by 0.0025 cun, 300 series, also can be made by other material.In the present embodiment, projection 12 are that stainless steel is made, and cam face 15 by reaching woods (a kind of chemical material) make, this compound material can reduce the friction force at interface, but also can use other other compound materials that can reduce friction.For example, inject the acetal resin of teflon.

The center line of load pillar 10 passes the center of rotor 7 , and extends to the free end of load pillar 10 .In the present embodiment, as shown in figure 14, the angle that center line 18 of the center line of projection 12 and load pillar 10 and not parallel, two lines deviate from is represented with Greek alphabet θ in Figure 14.Projection 12 have applied an asymmetric acting force on load pillar 10 , thereby provide the state of a rotation during near hard disk 2 surperficial at slider 11 .This rotation may be that the also possibility of forward is reverse for slider 11 , and both all have positive effect.When projection 12 when cam face 15 remove, the lower surface of the lower surface of load pillar 10 and slider 11 is parallel to the surface of hard disk 2 fully.

What Figure 15 A, Figure 15 B, Figure 15 C and Figure 16, Figure 17, Figure 18 showed is the relation of the centreline space of projection and load pillar, no matter is to adhere to, and still separately, all can be used for explaining being rotated in the forward, not changeing and reverse rotation is how to offer slider.At first, please refer to Figure 15 A, load pillar 25 comprise projection 26 , and this projection 26 have free end 27 .That be supported in load pillar 25 next door is slider 28 .For the ease of understanding, load pillar 25 are downward load pillars.The center line of load pillar 25 is represented by reference line 29 .Projection 26 stretch out and touch the surface of cam along center line 30 .What line 31 represented is contact point; Shown in Figure 15 A, indicating " e " is how much eccentricities of expression.The load direction of slider 28 is represented by reference line 32 .By the represented position relation of Figure 15 A, when slider 28 were loaded on the harddisk surface, reverse rotation can separate it.Figure 16 shows be when slider 28 be placed on magnetic disc 33 above the time, how reverse rotation is carried out, in Figure 16, the edge of magnetic disc is represented with reference line 34 .With reference to Figure 16, the edge 28a of slider 28 is higher than plane 35 than edge 28b , and by regulating free end 27 and the contact of projection 26 on cam face, the value of eccentricity will change, and is same, and the driving attitude of slider 28 also will change.In the hard disk drive of Figure 14, this adjustment realizes by cross slit 17 .

With reference to Figure 15 B, load pillar 25 and projection 38 have free end 39 , and projection 38 are specific dimensions, like this free end 39 just can be in the line of nodes of center line 29 of load pillar 25 contact on the surface of magnetic disc.Get because the cam face contact point is the center line according to the load pillar, therefore when do not change on load pillar 25 apart from the time, just do not have the rotation result accordingly.Therefore, as shown in figure 17, the distance of slider 28 on surperficial 35 to surperficial 35 approximately and the distance of edge 28b be the same, Here it is accordingly without spin with zero rotation status.

With reference to Figure 15 C, displaying be the execution that is rotated in the forward of load pillar and projection.In Figure 15 C, projection 40 are all shorter than projection 38 or 26 on length.Therefore, when free end 41 of projection 40 pass across cam at the cam centre line place, the center line of load pillar 25 and torque of the centrifugal generation between the contact point, this torque magnification edge 28b makes it to be higher than magnetic disc surface 35 than 28a .With reference to Figure 18, the edge 28a of slider 28 is than the close more magnetic disc of edge 28b surface 35 .Be rotated in the forward state, the reverse rotation state in Figure 17 than rotation status is more undesirable.

Torque is as a result calculated by following formula:

Torque (T)=preloading * eccentricity wherein, the power that preloading=the load pillar is subjected to, eccentricity=offset distance.

The upper limit of torque is 8-10gm-cm, optimum value of the present utility model be positioned at-0.5gm-cm＜T＜+scope of 0.5gm-cm, "+" and "-" in the scope represents forward and reverse rotation respectively.

Further how to please refer to Figure 19, Figure 19 is the partial enlarged drawing of hard disk 2 , is that head universal joint device 9 are described from three different positions in the drawings, is respectively head universal joint how load at first, be positioned at the position of cam cooperation and.Dynamic load and unloading that head universal joint 9 and a lower head universal joint (if use) and cam gear 14 cooperate and finish slider.The leftmost position of Figure 20 is that head universal joint begins load situation.There is detailed example this initial installation site at the Far Left of Figure 19, and free end 13 of projection 12 are less than tension.Head universal joint 9 are rotated counterclockwise, free end 13 move along salient angle 15a , if when not having further external force to be applied on universal joint 9 and free end 13 , they will stop at appropriate position recess 15b , in Figure 20, this position is the center of three positions of head universal joint.In practical operation, when provide starting current to the coil of CD-ROM drive motor on the time, hard disk 2 will have a rotational speed.Move to the location right of Figure 20 at free end 13 , cross recess 15c , when stopping at the down position 15b place of cam, universal joint 9 can be along counterclockwise direction rotation.The asymmetric position of projection 12 has caused the inward flange of more close magnetic disc 2 of slider 11 .A trend that is rotated in the forward is provided so just for slider 11 .

Although the dynamic load magnetic head does not directly contact with magnetic disc, through load/unloading many times, still clearly in the wearing and tearing at magnetic head edge or edge fog.These are fuzzy to be touched the injustice place on magnetic disc surface by magnetic head eminence and they are polished causes.In case wearing and tearing take place, magnetic head will no longer contact with magnetic disc, and wearing and tearing just can not aggravate again.Magnetic head has lasting tiny wearing and tearing in initial position near magnetic disc.This wearing and tearing may occur in local or insensitive place of magnetic head sensitivity.Rotation feature that the utility model is adjustable allows the place of control wearing and tearing, guarantees that it occurs in insensitive zone.

Near magnetic material, read/write element is usually located at the back of slider for as much as possible.If the fuzzy read/write gap location that appears at may occur changing at gap location, change the magnetic behavior of magnetic head.But if the fuzzy edge that occurs in along zero load, the weight of whole magnetic head rotation is received slight influence, because the area that its surface ratio is blured is much bigger.By in load and unloading, provide a rotating speed to magnetic head, blur and will avoid the sensitizing range, thereby improved the integrality of total system.

With reference to Figure 20, the angle of part 15b can be 7 ° to 18 °, and the best angle scope is 9 ° to 12 °.As shown in figure 20, hard disk 2 extend the peripherals to it, inner free end 15e to cam face 15 .The adjustment of cam gear 14 on the hard disk radial direction allows.

Shown in Figure 11 is the vertical view of dynamic load hard disk drive 10.This device comprises a driving body 10A _I, a magnetic disc 11 _IWith a rotary actuator 12 _IMagnetic disc 11 _IStator and motor 13 round associating _IRotation is at rotary actuator 12 _IAn end points connecting a magnetic head 14 _IWith a driven device 15 of cam _I, this driven device 15 _IAft section be positioned at a slope 16 _IOn.

Around rotating shaft 17 _IActuator 12 _IBe by carrying out coil 18 _IUnite driving with magnetic devices.Wherein, actuator 12 _IAn end be an inertial lock storage 19 _I

Figure 12 A is an inertial lock storage 19 _IView, Figure 12 A shows a state of opening or not latching.Rotating shaft 21 _IAn end be connected coasting body 20 _IOn, coasting body 20 like this _IJust can rotate on the direction arbitrarily.Rotating shaft 21 _IThe other end be connected device 10 _I On.Coasting body 20 _IIn fact can be Any shape, because its shape is to its not influence of operation.One is latched pin 22 _IBe connected to coasting body 20 _IThe surface on.When inertial lock storage 19 _IWhen the state that does not latch, latch pin 22 _IThe angle position be by coil spring 23 _IDecision.From actuator 12 _IExtend upward a pointer 26 _IThe outstanding plane 27 that is connected to _I, this plane is at pin 22 _IWhen being rotated counterclockwise, be positioned at pin 22 _IThe path on.

When driver 10 _IWhen not operating, magnetic head 14 _INormally by STRUCTURE DEPRESSION shown in Figure 13.As shown in figure 13, the driven device 15 of cam _IBe positioned at slope 16 _IThe following driven device 15 of cam _IBe similar and symmetrical.The driven device 15 of cam _IAnd 15a _IFrom magnetic disc 11 _IDuring rotation, they can be on the inclined-plane 30 _IMeet.When the driven device 15 of cam _IWith 15 _AIContinuation is along the inclined-plane 30 _IWhen turning left, magnetic head 14 _IWill be from magnetic disc 11 _IThe surface lift, up to the driven device 15 of cam _IWith 15 _AIThe position 31 that arrival is latched _IThe driven device 15 of arrest cam _IWith 15 _AIMove to and latch position 31 _IOutside the scope.

When the magnetic disc driver is closed, the driven device 15 of cam _IWith 15 _AIBe still in and latch position 31 _IOn, inertial lock storage 19 _IBe positioned at not latch mode.The driven device 15 of cam _IWith 15 _AIWith slope 16 _IBetween friction force enough big, it can suppress actuator 12 _IRotate.If magnetic disc driver 10 _IBe subjected to a very big clockwise acting force, but actuator 12 _IAccording to counterclockwise direction rotation, and allow magnetic head 14 _IWith magnetic disc 11 _IContact.In this case, coasting body 20 _IWill overcome spring 23 _IActing force, and can be along rotation counterclockwise.Pin 22 _IAlso can rotate through a β angle, run into surface 27 up to it _IIn this position, pin 22 _I Locking cam 26 _IAny motion to the right, thus actuator 12 stoped _IAccording to rotation counterclockwise.Spring 23 _IWill be with coasting body 20 _IRetract the state that does not latch, the driven device 15 of cam _IWith 15 _AICan turn back to latched position 31 _I

If magnetic disc driver 10 _IBe subjected to a very big counterclockwise acting force, that will not have any problem, actuator 12 _IWill rotate according to clockwise direction, then, the driven device 15 of cam _IWith 15 _AIWill turn back to latched position 31 _I

Inertial lock storage 19 _IEffective operating part be to depend on compression spring 23 _IThe correct adjustment of the moment that is produced.In fact, when magnetic disc driving 10 _IWhen not being subjected to tangible revolving force, spring 23 _IOnly needing can be with latch 19 _IThe acting force that remains on a unlocked state gets final product.

In the utility model, coasting body 20 _IShape and size can be arbitrarily, pin 22 _I, pointer 26 _IWith spring 23 _IAll can there be other elements suitable to substitute with its function.

Claims (10)

1. minidisk drive unit, it comprises a magnetic disc device, one housing, one rotation motor, wherein, described magnetic disc device is used to write down and Copy Info, described rotation motor is to be used to drive above-mentioned magnetic disc device, it is characterized in that: described rotation motor comprises a rotor and a stator, described rotor is used for accepting above-mentioned magnetic disc device and rotates round rotating shaft, one in described stator and the rotor has one group of magnetic core, and another then has one group of loop construction, and described loop construction comprises first group of coiler part and second liang of group coiler part, when drive current offers above-mentioned loop construction, only have the first above-mentioned coil to be used for driving rotor, when the drive current of coil was cut off, two groups of above-mentioned coiler parts all were used for producing inverse electromotive force.

2. minidisk drive unit as claimed in claim 1 is characterized in that: when drive current was cut off, the first and second above-mentioned coiler parts connected into an integral body.

3. minidisk drive unit as claimed in claim 2 is characterized in that: described magnetic disc driver comprises an actuator, and this actuator main part is positioned on the above-mentioned housing, and around second axle rotation.

4. minidisk drive unit as claimed in claim 3, it is characterized in that: comprise that one carries out CD-ROM drive motor, described motor is connected on the above-mentioned main part, it comprises the coil of a known resistance, and the first and second above-mentioned coiler part joint resistances should equate with above-mentioned known value.

5. minidisk drive unit as claimed in claim 1 is characterized in that: described first and second coiler parts are two-wire relations side by side.

6. minidisk drive unit as claimed in claim 1 is characterized in that: one in described first or second coiler part is wrapped in above another.

7. minidisk drive unit as claimed in claim 1 is characterized in that: one in described rotor and the stator comprises one group of loop construction, and each loop construction all has independently around core, and the first and second two coiler parts are all arranged.

8. minidisk drive unit as claimed in claim 7 is characterized in that: described first and second coiler parts are to be wrapped in side by side on the above-mentioned relevant axle center.

9. as claim 1 any one described minidisk drive unit to the claim 8, it is characterized in that: the diameter of above-mentioned magnetic disc is between 45 millimeters to 50 millimeters scopes.

10. as claim 1 any one described minidisk drive unit to the claim 8, it is characterized in that: first overall diameter of described housing is approximately 51 millimeters, and second diameter is about 70 millimeters.

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