CN2605638Y - Magnetic disk drive device - Google Patents

Abstract

The utility model discloses a disk drive which comprises a disk device for recording and copying information, a shell with about 50 mm of a first external size, a rotary motor arranged in the shell for rotating the disk device, an actuating device which can rotate around a first pivot and a coasting lockup device for preventing the actuating device from rotating under the function of rotary force. A magnetic head device for reading-in or writing-in information is arranged on the actuating device. The coasting lockup device includes a coasting body which can rotate around a second pivot, a lockup device which is arranged on the coasting body and a deflection device which is combined in deflection with the lockup device; wherein the deflection device is made to be combined with the lockup device and the actuating device when the disk drive is stressed under a rotary force.

Description

Disk drive

[technical field]

The utility model is about a kind of data information memory device, refers in particular to the disk drive of a kind of data information memory on the disk of rotation.

[technical background]

In computer system, information often is stored on a hard disk or the floppy disk thin magnetic film surface.These information are to be stored on the concentric track, can realize reading of information by a magnetic head assembly.When storing or reading information, head gimbal directly contacts with magnetic disk surface to avoid magnetic head on the air-supported layer of the disk of high speed rotating.

In most disk drive, magnetic head all is mounted near the end of an actuating device.Widely used actuating device has linear pattern and rotary-type two kinds in the prior art.In the linear pattern actuating device, magnetic head is at first over against the central authorities of disk, then actuating device along disk radial direction straight line move with head position at preposition.And in rotary-type actuating device, actuating device rotates near the circumference of disk around rotation center, with this with head position at preposition.

When disk drive did not move, magnetic head left the data field of disk.Disk drive can be divided into the dynamic loading type and contact two kinds of beginning/stop types according to the ground that this moment, magnetic head was parked.In dynamic loading type disk drive, when disk drive does not move, magnetic head is withdrawn into a place away from disk, such as be parked on the oblique rail structure, and in contact beginning/stop type disk drive, when disk drive did not move, magnetic head rested in the non-data field of disk central authorities.Magnetic head and disk any improper contacts the scuffing that all may cause disk, therefore is locked in magnetic head on the above-mentioned oblique rail structure reliably or is very important in the non-data field of disk central authorities.

In the prior art, there has been the structure of many locking actuators.Such as in some disk drive, when disk drive cuts off the power supply, its actuating device is by a magnetic devices or snap switch fixing, and when disk drive is switched on, make actuating device drive the data field that magnetic head moves to disk thereby the motor of actuating device overcomes the retain strength of magnetic devices or snap switch.If yet said structure is the influence that is given a shock, causes contacting of magnetic head and disk thereby its actuating device may break away from the constraint of magnetic devices or snap switch.

Also have a kind of structure that relies on snap switch and solenoid to come locking actuator, when solenoid non-energized, snap switch is locked in the precalculated position with actuating device, and after the solenoid energising, can discharge the actuating device that is locked by snap switch.Although this design can avoid the influence that shakes, solenoid to have cost height, unreliable and shortcoming that power consumption is big.Correlation technique please refer to United States Patent (USP) the 4th, 716, and No. 480 and 4,725, No. 907.

The influence that rotary-type actuating device is given a shock especially easily and quickens.But owing to when the rotary-type actuating device of design, can make actuating device reach balance with respect to the point of rotation, pure translation vibrations will act on the both sides of the point of rotation simultaneously and actuating device is affected.Smaller non-equilibrium factor such as the error that causes because of manufacturing, also is not enough to actuating device is exerted an influence.But the inertial force that causes because of the rotation vibrations is easier to cause waving of actuating device, so just probably magnetic head is contacted with disk, therefore, need provide a kind of safeguard measure to overcome this inertial force.For portable computer, they operate in particular environment especially, very easily are subjected to rotating the influence of vibrations in the process that moves, so more need to provide this safeguard measure that overcomes inertial force.

[summary of the invention]

The technical matters that the utility model solves is to provide a kind of disk drive that adopts the inertia locking device of simple in structure, dependable performance.

The technical solution adopted in the utility model is: a kind of disk drive comprises the disk set of a record and Copy Info, one has the housing of first external dimensions of about 50mm, one is installed in the housing and is used for the rotation motor of spinning disk device, one can prevent that this actuating device is being subjected to the inertia locking device that rotates under the effect of revolving force around the actuating device and of one first pivot rotation, installing one on this actuating device is used to read or the magnetic head assembly of writing information, this inertia locking device comprises that one can be around the coasting body of one second pivot rotation, one is installed in a locking device and the inflector assembly that combines with described locking device deflection on the coasting body, described inflector assembly when disk drive is subjected to a revolving force in conjunction with locking device and actuating device, this locking device departs from initial position and blocks this actuating device, and this inflector assembly relies on elastic force that this locking device is returned to initial position.

The technique effect that the utility model reached is: this disk drive adopts inertia locking device locking actuator simple in structure, and dependable performance is suitable in the computing machine such as on knee, portable it.

[description of drawings]

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

Fig. 1 is to use the vertical view of the dynamic loading type disk drive of inertia locking device.

Fig. 2 A is the constitutional diagram that the inertia locking device of the utility model disk drive is in opening.

Fig. 2 B is the constitutional diagram of the inertia locking device of the utility model disk drive when being in the lock state.

Fig. 3 is the curved surface slide rail among Fig. 1 and the cut-open view of other associated component.

Fig. 4 is to use the contact of inertia locking device to begin/vertical view of stop type disk drive.

[embodiment]

As shown in Figure 1, a dynamic loading type disk drive 10 comprises that one is installed in driving body 10A, a disk 11 and the rotary actuator 12 in the housing (not label), and disk 11 is by rotation motor 13 drivings and around its rotation.One end of actuating device 12 is equipped with magnetic head 14 and cam follower 15, and this rearward end that magnetic head 14 and cam follower 15 are installed can be crossed over slide rail 16 stretching, extensions with curved-surface structure.The length of the housing of this disk drive 10 is approximately 70mm, 50.8mm, 10mm respectively, and being applicable to that the disk diameter on the disk drive 10 of this kind model can be between 45mm to 50mm, memory capacity is between 11.5 megabyte and 23.0 megabyte.The diameter of the utility model disk 11 is approximately 48mm.

Actuating device 12 is around a pivoting lever 17 rotations, and by a drive coil 18 drivings, this drive coil 18 makes a sound coil motor rotary actuator 12 with a magnet arrangement (not shown), so that magnetic head 14 is positioned at a certain precalculated position on the disk 1.One end of contiguous actuating device 12 is installed an inertia locking device 19, the concrete structure of this inertia locking device 19 is shown in Fig. 2 A and Fig. 2 B, shown in Fig. 2 A, when it is in opening, driving body 10A goes up and installs one 21, this other end of 21 is installed a coasting body 20, and this coasting body 20 can be to a direction rotation.This coasting body 20 is shown as annular in Fig. 2 A, but during actual enforcement, because of the shape of this coasting body 20 does not influence its runnability, so its shape can be other Any shape except that annular.The mounted on surface one locking pin 22 of coasting body 20.When inertia locking device 19 was in opening, the angle determining positions of stop pin 22 threaded shafts 21 was in a spring 23, and this spring 23 is in 25 stretching, extensions of a cylinder 24 that links to each other with driving body 10A and a cylinder that links to each other with coasting body 20.The actuating device 12 prominent fingers 26 of establishing one and one surface, 27 vicinities, this fingers 26 is corresponding with its motion path when stop pin 22 counterclockwise rotates.

When disk drive 10 inoperatives, magnetic head 14 is usually by cam follower 15 blocks, this cam follower 15, and as shown in Figure 3, the cam follower 15a identical with is arranged on slide rail 16 downsides symmetrically.Cam follower 15, when being swung away from disk 11,15a can on the inclined-plane on the slide rail 16 30, meet.When cam follower 15,15a further left along the inclined-plane 30 when sliding, magnetic head 14 lifts from the surface of disk 11, arrives latched position 31 up to cam follower 15,15a.One block (not shown) can prevent that cam follower 15,15a from moving to the distant place of latched position 31.

When disk drive 10 cut out, cam follower 15,15a rested in latched position 31 usually, and inertia locking device 19 is in the opening shown in Fig. 2 A usually.The friction force that cam follower 15,15a and slide rail are 16 is enough to block actuating device 12 and produces small vibration when swing.When disk drive 10 produced a big clockwise revolving force, actuating device 12 counterclockwise rotated relative driving body 10A, allows magnetic head 14 to contact with disk 11 potentially.At this moment, the inertia of coasting body 20 will overcome the elastic force of spring 23, also relative driving body 10A be rotated in a counter-clockwise direction.Therefore stop pin 22 will rotate an angle beta shown in Fig. 2 B, contact with surface 27 until it.In this position, stop pin 22 stops any motion that may be to the right of fingers 26, thereby prevents actuating device 12 rotation counterclockwise.Following and vibrating, spring 23 will promote coasting body 20 to get back to the opening shown in Fig. 2 A, and cam follower 15,15a will return latched position 31.

If disk drive 10 produces a powerful anticlockwise power, the problem that will not have produces, and because of actuating device 12 rotates relative driving body 10A to clockwise direction, arrives the projection place up to this actuating device 12, afterwards, cam follower 15,15a will be back to latched position 31.

Clearly, effective operation of inertia locking device 19 partly depends on the correct adjustment that spring 23 puts on the moment of torsion on the coasting body 20.Have been found that in the practice that when disk drive 10 does not present tangible revolving force the enough power of spring 23 need generations is kept inertia locking device 19 and is in opening.

Coasting body 20 shown in Fig. 2 A and 2B can be other possible shape, stop pin 22 and fingers 26 can by other any two can be under the rotation of coasting body 20 assembly of combination or device by any way cause so that stop actuating device 12 to rotate by any way and to produce contacting of magnetic head 14 and 11 of disks.Coasting body 20 can be positioned at the position of contiguous actuating device 12 of below, top, rear or any aforesaid combination of actuating device 12.Inertia locking device 19 can be positioned at arbitrary part or arbitrary surface of actuating device 12.

Spring 23 can be replaced by many other similar mechanical hook-ups, as long as this device can be kept inertia locking device 19 in the open site, and can prevent its unexpected locking when disk drive 10 does not produce revolving force.For example, spring 23 can be replaced by an elastoplast.One torque spring can be positioned over around the axle 21, or spring 23 can one-body moldedly be a soft spring shaft with axle 21.One also can be used for fixing inertia locking device 20 a common open site by moving magnet.

Inertia locking device of the present utility model also can use on contact beginning/stop type disk drive.As shown in Figure 4, wherein inertia locking device 40 can prevent the actuating device 41 retainer clockwise direction rotation of contact beginning/stop type disk drive 42 relatively.Magnetic head 43 shows the stop position that is positioned at disk 44 inside, and disk drive 42 is in non-operating state.Inertia locking device 40 is in the lock state, and when disk drive 42 runs into an anticlockwise power, this inertia locking device 40 prevents that magnetic head 43 from sliding along clockwise direction on disk 44.

Claims (8)

1. a disk drive, the disk set that comprises a record and Copy Info, one housing, one is installed in the housing and is used for the rotation motor of spinning disk device, one can prevent that this actuating device is being subjected to the inertia locking device that rotates under the effect of revolving force around the actuating device and of one first pivot rotation, installing one on this actuating device is used to read or the magnetic head assembly of writing information, it is characterized in that: this housing has first external dimensions of about 50mm, this inertia locking device comprises that one can be around the coasting body of one second pivot rotation, one is installed in a locking device and the inflector assembly that combines with described locking device deflection on the coasting body, described inflector assembly when disk drive is subjected to a revolving force in conjunction with locking device and actuating device, this locking device departs from initial position and blocks this actuating device, and this inflector assembly relies on elastic force that this locking device is returned to initial position.

2. disk drive as claimed in claim 1 is characterized in that: when described inflector assembly can produce inertial force with a predetermined magnetic force at disk drive, can prevent that coasting body from rotating around second pivot.

3. disk drive as claimed in claim 1 is characterized in that: described locking device is a stop pin that is combined on the coasting body.

4. disk drive as claimed in claim 1 is characterized in that: described inflector assembly is a spring that is connected with coasting body.

5. as each described disk drive in the claim 1 to 4, it is characterized in that: described disk drive is a dynamic loading type disk drive.

6. as each described disk drive in the claim 1 to 4, it is characterized in that: described disk drive is a contact beginning/stop type disk drive.

7. as each described disk drive in the claim 1 to 4, it is characterized in that: the diameter of described disk is greatly in the scope of 40mm to 50mm.

8. as each described disk drive in the claim 1 to 4, it is characterized in that: described housing comprises second size of an about 70mm.

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