CN2590125Y - Disk driver - Google Patents

Abstract

The utility model relates to a disk drive which comprises a disk, a body, an actuator which is capable of rotating around a pivot and an inertia locking device for preventing the actuator from rotating under the action of rotary force, wherein the body is provided with a rotary motor to drive the disk; the actuator is provided with a magnetic head assembly for input or output of information; the inertia locking device comprises a coasting body which is capable of rotating around an axle, an impeding device for preventing the actuator from rotating around the pivot and an elastic device. The impeding device is arranged on the coasting body. The elastic device restricts the displacement of the impeding device. When the disk drive is subjected to the rotary force, the impeding device deviates from the initial position and blocks off the actuator. The elastic device restores the impeding device to the initial position by means of elastic force. The inertia locking device used in the disk drive has simple structure and reliable performance without use of electric drive, and is especially suitable for the disk drive of the portable computer which is adaptable of battery.

Description

Disc driver

[technical field]

The utility model relates to a kind of disc driver, refers to a kind of disc driver that is applicable in the portable computer and has the inertia lock especially.

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

When the disc driver inoperation, magnetic head leaves the data field of disk.Disc driver can be divided into two kinds on dynamic importing type and contact start and stop type according to the ground that this moment, magnetic head was parked.In dynamic importing type disc driver, when the disc driver inoperation, magnetic head is withdrawn into a place away from disk, such as be parked on the oblique rail structure, and in contact start and stop type disc driver, when the disc driver inoperation, magnetic head rests 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 lock actuator.Such as in some disc driver, when disc driver cuts off the power supply, its actuator is by a magnetic devices or snap switch fixing, and when disc driver is switched on, make actuator drive the data field that magnetic head moves to disk thereby the motor of actuator 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 actuator 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 lock actuator, when solenoid non-energized, snap switch is locked in the precalculated position with actuator, and after the solenoid energising, can discharge the actuator 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 actuator is given a shock especially easily and quickens.But owing to when the rotary-type actuator of design, can make actuator 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 actuator is affected.Smaller non-equilibrium factor such as the error that causes because of manufacturing, also is not enough to actuator is exerted an influence.But the inertial force that causes because of the rotation vibrations is easier to cause waving of actuator, 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 purpose of this utility model provides a kind of disc driver with disk inertia lock of simple in structure, dependable performance and not power consumption.

The purpose of this utility model is achieved through the following technical solutions: a kind of disc driver comprises a disk, one body, one can prevent the inertia locking device that this actuator rotates around the actuator and of pivot rotation under the effect that is subjected to revolving force, one rotation motor is installed on this body drives this disk, installing one on this actuator 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 a rotation, one is used to stop retention device and the elastic device of this actuator around its pivot rotation, this retention device is located on this coasting body, this elastic device is limiting the displacement of this retention device, when disc driver is subjected to a revolving force, this retention device departs from initial position and blocks this actuator, and this elastic device relies on elastic force that this retention device is returned to initial position.

The advantage of the utility model disc driver is: compared with prior art, this inertia lock is simple in structure, and dependable performance and not power consumption are specially adapted to use the portable computer disc driver of battery.

[description of drawings]

In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.

Fig. 1 is to use the vertical view of the dynamic importing type disc driver of inertia lock.

Fig. 2 A is the constitutional diagram of the inertia lock of the utility model disc driver when being in the release position.

Fig. 2 B is the constitutional diagram of the inertia lock of the utility model disc driver when being in the lock state.

Fig. 3 is the oblique trailer structure among Fig. 1 and the side view of other element.

Fig. 4 is to use the vertical view of the contact start and stop type disc driver of inertia lock.

[embodiment]

Please refer to Fig. 1, a dynamic importing type disc driver 10 comprises a body 10A, a disk 11 and a rotary-type actuator 12.The driving combination 13 that one rotor and motor are formed is installed on the body 10A, and this disk 11 is driven combination 13 drivings and is driven combination 13 rotations around this by this.One end of this actuator 12 is equipped with a magnetic head 14 and driven member 15, and an end of this driven member 15 is supported on the oblique rail structure 16.Driven member 15 and oblique rail structure 16 will be described in detail in Fig. 3.

The voice coil motor that this actuator 12 is made up of a coil 18 and a magnet arrangement (figure does not show) drives, and this actuator 12 is around a turning axle 17 rotations, magnetic head mounted thereto 14 is positioned at the predetermined point of disk 11 tops.The end that closes on actuator 12 is provided with an inertia lock 19, and this inertia lock 19 will be done more detailed the introduction with reference to figure 2A.

Fig. 2 A is that inertia lock 19 is in the constitutional diagram when open.An end of one 21 penetrates a coasting body 20 and this coasting body 20 can be rotated freely around this axle 21, and this other end of 21 is fixed on the body 10A.What need indicate is, the coasting body 20 among Fig. 2 A is rounded, but because its shape can't influence its operation, so can be designed to various shape in the reality.One backing pin 22 is fixed on the surface of this coasting body 20.When inertia lock 19 is in open state, shown in Fig. 2 A, backing pin 22 determines that by a volute spring 23 these spring 23 two ends are separately fixed on two projections 24 and 25 with respect to the angular displacement of axle 21, and projection 24 and 25 is separately fixed on body 10A and the coasting body 20.This actuator 12 is provided with a blocking surface 27, and is provided with a finger-like protuberance 26 in the place adjacent with this blocking surface 27.

When disc driver 10 inoperation, the motion of magnetic head 14 is limited by oblique rail structure 16 shown in Figure 3 usually, and Fig. 3 is the side view of this oblique rail structure 16.As shown in Figure 3, this actuator 12 is provided with two identical driven members 15 and 15a in the upper and lower surface of oblique rail structure 16.After disk 11 is left in driven member 15 and 15a rotation, this driven member 15 and 15a contact with inclined-plane 30 on this oblique rail structure 16, in the process that this driven member 15 and 15a move to left along inclined-plane 30, this magnetic head 14 is lifted the surface away from disk 11 gradually, arrives locked position 31 up to this driven member 15 and 15a.One barrier structure (figure does not show) stops this driven member 15 and 15a to move on, and crosses this locked position 31 to prevent it.

To introduce the operation of inertia lock 19 below.When disc driver cut off the power supply, driven member 15 and 15a rested on locked position 31 usually, and inertia lock 19 is in the open state shown in Fig. 2 A.When producing faint rotation vibrations when being subjected to faint revolving force, the friction between driven member 15,15a and the oblique rail structure 16 can suppress the rotation of actuator 12.Yet when disc driver 10 is subjected to the strong power that turns clockwise, actuator 12 will be rotated counterclockwise with respect to body 10A, the danger that causes magnetic head 14 and disk 11 directly to contact.In this case, the inertia of coasting body 20 will overcome the elastic force of spring 23, and shown in Fig. 2 B, coasting body 20 also is rotated counterclockwise with respect to body 10A, and like this, angle beta of backing pin 22 rotations is up to these backing pin 22 contact blocking surfaces 27.In this position, backing pin 22 has blocked the motion that protuberance 26 continues to the right, has therefore stoped being rotated counterclockwise of actuator 12.Afterwards, spring 23 is withdrawn into release position shown in Fig. 2 A with coasting body 20, and driven member 15 and 15a will get back to locked position 31.

If disc driver 10 is subjected to the strong power that is rotated counterclockwise, can not have problems yet.This moment, actuator 12 will turn clockwise with respect to body 10A, but when actuator 12 rotated to this prevention structure (scheming not show), this prevention structure had been blocked being further rotated of actuator 12, and driven member 15 and 15a will get back to locked position 31 afterwards.

In the above-described embodiments, the inertia size of the elastic force of spring 23 and coasting body 20 is very important, and in practical operation, when disc driver 10 was not subjected to revolving force, it was best in the release position that the elastic force of spring 23 can just keep inertia lock 19.

It is emphasized that the structure among Fig. 2 A and Fig. 2 B, comprise that coasting body 20, backing pin 22 and protuberance 26 are a kind of embodiment of the present utility model.As mentioned above, coasting body 20 can have multiple shape, and backing pin 22 and protuberance 26 can be by any device replacements that can cooperatively interact and can stop actuator 12 rotations.Though in Fig. 2 A and Fig. 2 B, coasting body 20 be provided in a side of actuator 12 below, also can be located at other other places.And inertia lock 19 can be arranged on any position of closing on actuator 12.

The function of spring 23 is to keep inertia lock 19 at open state, so spring 23 can be replaced the resilient structure of making as plastics or rubber etc. by a lot of structures.Use a torque spring to be enclosed within and constitute a resilient pivot on the axle 21, thereby replace spring 23.

The inertia lock that the utility model adopts also can be used in the contact start and stop type disc driver, and as shown in Figure 4, inertia lock 40 can prevent actuator 41 turning clockwise with respect to disc driver 42 remainders.When the disc driver inoperation, magnetic head 43 is in the stacking area, center of disk 44.When being subjected to being rotated counterclockwise power, inertia lock 40 can prevent that magnetic head 43 from slipping over disk 44 along clockwise direction, and Fig. 4 demonstrates the locking state of inertia lock.

Claims (7)

1. a disc driver comprises a disk, one body, one can prevent the inertia locking device that this actuator rotates around the actuator and of pivot rotation under the effect that is subjected to revolving force, one rotation motor is installed on this body drives this disk, installing one on this actuator is used to read or the magnetic head assembly of writing information, it is characterized in that: this inertia locking device comprises that one can be around the coasting body of a rotation, one is used to stop retention device and the elastic device of this actuator around its pivot rotation, this retention device is located on this coasting body, this elastic device and this retention device resilient engagement, when disc driver is subjected to a revolving force, this retention device departs from initial position and blocks this actuator, and this elastic device relies on elastic force that this retention device is returned to initial position.

2. disc driver as claimed in claim 1 is characterized in that: this retention device comprises that one is fixed on the backing pin on this coasting body.

3. disc driver as claimed in claim 1 is characterized in that: this elastic device is one to be connected the spring on this coasting body.

4. disc driver as claimed in claim 1 is characterized in that: this elastic device is made by plastics or elastomeric material.

5. disc driver as claimed in claim 1 is characterized in that: this disc driver is dynamic importing type.

6. disc driver as claimed in claim 1 is characterized in that: this disc driver is contact start and stop types.

7. disc driver as claimed in claim 1 is characterized in that: this actuator comprises a conductive coil, and this actuator is driven by a voice coil motor.

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