JPS60133576A - Storage device of magnetic disc - Google Patents

Abstract

PURPOSE:To prevent the damage of a servo signal and to attain normal restarting after carrying of the titled device by shunting a magnetic head on the working area side in which servo data are not recorded at the carrying of the device. CONSTITUTION:An actuator lock mechanism is constituted by a blacket 11, right and left sliders 19, 20 and a lever 18 pivotally supported by a pin 17. At the locking case, a coil bobbin 9 is held between the right and left siders 19, 20 and the blacket 11, the actuator 4 is rotated in the clockwise direction and the magnetic head 8 is shunted to the working area 3e in the most inner periphery of a disc in which no servo signal are recorded. Consequently, the servo signal is not damaged during the carrying of the device, and at the restarting, the device is unlocked and the head is returned to a CSS zone, so that normal restarting can be executed precisely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic disk storage device, and more particularly, the present invention relates to a magnetic disk storage device, and more particularly to a magnetic disk storage device that can prevent failures caused by a shock during transportation of the device that makes it impossible to restart the device. Related to disk storage devices.

[Background of the invention]

In recent years, magnetic disk storage devices have become smaller and lighter as storage density has improved, and large-capacity devices that previously could not be carried by hand are now so small and light that they can be carried by hand. In order to prevent the magnetic disk and the magnetic head from colliding with each other with a large force during transportation and being damaged during transportation, the magnetic disk device is relatively easy to carry. A locking mechanism is provided for locking movement in the access direction. For example, such a device includes a disk locking means that comes into contact with the outer peripheral edge of the magnetic disk to prevent rotation of the magnetic disk, a rotary arm that rotationally supports a magnetic head, and a rotary arm that prevents the rotation of the magnetic disk by the disk locking means. If the magnetic head is blocked, the magnetic head is retracted onto the contact start/stop zone (hereinafter referred to as C8S zone) on the magnetic disk by synchronously locking the rotary arm. The head is retracted above the C88 zone and the movement of the magnetic disk and actuator is prevented.

The inventors experimented with such a locking mechanism, but after obtaining and transporting a device using this locking mechanism, they restarted the device and discovered that the rotary arm did not operate.

[Purpose of the invention]

The object of the present invention is to eliminate the problems of the prior art, and to provide a magnetic disk drive having a locking mechanism that allows the magnetic disk drive to be restarted normally even after being transported.

[Summary of the invention]

In order to achieve the above object, the present invention focuses on the fact that the servo data is damaged as a result of considering the reason why the magnetic disk device does not restart. The present invention is characterized in that the magnetic disk device is provided with an actuator lock mechanism that is retracted to the upper processing area.

[Embodiments of the invention]

As a result of considering the causes of failure in restarting a magnetic disk drive after transport, as described in the "Background of the Invention" section, the inventors found that when a magnetic head located on the C8S zone crashes due to transport. It was discovered that the servo signal in the C8S zone was destroyed by the crash, and because the magnetic head could not read the servo signal, the rotary arm for positioning the magnetic head did not operate normally. Specifically, the magnetic disk has a data zone for recording and reproducing data, and a C8S goon located on the outer or inner periphery of the data zone for floating or landing the magnetic disk using an air viscous flow. It has a stopper zone that is stopped when the access arm runs out of control, and an innermost and outermost machining area, and a magnetic head that transmits servo signals for highly accurate positioning over the data zone and C8S zone. Although it is placed on the stopper zone, it was discovered that if the servo signal on the C8S zone or stopper zone is damaged, it becomes impossible to control the positioning and restart is impossible. It is something.

Therefore, the inventors focused on the above-mentioned area 11 on the magnetic disk where the rotary arm is not normally located, mechanically retracts the magnetic head to the processing area when the rotary arm is locked, and when restarting, the magnetic head is placed above the processing area. 1 is a plan view of a magnetic disk drive having an embodiment of the actuator locking mechanism according to the present invention.

J! FIG. 2 is a side sectional view of the magnetic disk device, taken along the line A-A in FIG.

Figure 115 and Figure 4 are views showing an example of the actuator locking mechanism of the device shown in Figure 111 and Figure 2.

Figures 5 and 6 are diagrams showing other examples of actual flow of the actuator lock mechanism.

The magnetic disk drive shown in Fig. 1 and Fig. 2 includes a spindle 200 that is directly connected to a motor 2 and rotatably supports a plurality of magnetic disks 5, and a head arm 7 that supports a head 8 on a pivot shaft. an actuator 4 rotatably held by a magnet 10 and a voice coil motor comprising a magnet 10 and a coil bobbin 9 to rotationally drive a magnetic nod 8; an actuator locking mechanism to be described later; and a base 1 supporting and surrounding these mechanisms. It consists of This magnetic disk device has a motor 2
The actuator 4 rotates the pivot shaft 6 by the driving force of the voice coil motor, thereby positioning the magnetic head 8 at a desired track on the magnetic disk A, which is rotationally driven by the actuator 4.

Further, rubber stoppers 124 and 12'A supported by the bracket 11 are provided at both rear ends of the voice coil motor.
If the actuator 4 runs out of control due to an abnormality in the voice coil motor, the stoppers 1211L and '9-12A operate to prevent the movement of the coil 9. In the state where the coil 9 is pressed against the stopper 12IIL, the magnetic head 8 is located in the stopper zone 6C at the outer circumferential position of the magnetic disk 3 because the coil 9 is pushed into the rubber stopper 12cL. Similarly, when the coil 9 is pressed against the stopper 12er, the magnetic nodule 8 is located in the inner circumferential stopper zone 6C. This stopper zone 3C is a data zone 3k provided between the zones.
Similarly to the C8S zone 3cL, the magnetic nodule 8 has the ability to move on its surface, so it is processed very smoothly in f and c like the data zone b and the like. These zones Jt and others are called a levitation guaranteed area 3f in order to guarantee the levitation of the nod 8 to the magnetic field. - Moth, the stopper zone 5
A not-so-smooth machining zone 34 is provided at the innermost and outermost circumferential positions of the inner and outer sides of c, for example, in order to protect the disk 3 when assembling the device.

Now, the actuator lock mechanism that is a feature of this embodiment includes a pin 23 that rotatably holds the bracket 11 having the rubber stopper 124i, a spring 16 that applies a force to rotate the bracket 11 in the direction of the arrow, and a roller 21α.
A right slider 20 that can be moved in a linear direction by being sandwiched between them, a left slider 19 that can similarly be moved by a roller 214, and pins 22a and 22A that protrude from the upper surface of the rear end of the right and left sliders 20 and 19, and both ends. It is provided with a lever that can be rotated in a state in which it is engaged with sliders 20 and 19 at both ends by being held in the center by a pin 17.

The operation of this locking mechanism will be explained using Figures 3 and 4. Figure 6 is a diagram showing the locking mechanism in a state where the lock is not engaged. In this state, the lever 18
is positioned upward to the left, and in order to move the pin 224 engaged with the hole at the left end of the lever 18 upward, the left slider 19 is guided by the opening 214 and positioned upward. . At the same time, the right slider 20 engaged with the right end of the lever 18 is positioned downward. At this time, the flat end i9a at the tip of the left slider 19 is connected to the left placket 15.
By pressing against the elastic force of the spring 16, the rubber dampers 12A and 12 of the left and right proceratoms 15 and 11
A limits the operating range of the coil bobbin 9 described above and prevents the actuator from running out of control.

FIG. 414 is a diagram showing a state in which the actuator of the actuator lock mechanism is engaged.

In this state, the pin 17 rotates in the direction of the arrow from the state shown in FIG. The slope IK 20α presses the right end of the coil bobbin 9 and the left slider 19
The left bracket 15, which allows the coil 9 to move leftward by the inclined part 19 and can be rotated around the pin 23, is locked by the locking part 194. Therefore, the coil bobbin 9 is
When moved to the left, the actuator 4 is sandwiched between the left and right sliders 19 and 20, so the actuator 4, whose rear end is connected to the coil bobbin 9, rotates clockwise and rotates the magnetic head 8 by 1w. It is evacuated to the processing zone 6 which is the innermost circumference of the disk 3.

The magnetic head 8 located above this processing zone 6 collides with the disk 3 when the device is transported, for example, but the servo data for positioning is not recorded in this blade zone 34, and there is no need to restart the machine. Sometimes, the device can be restarted because it is relocated to the C8S zone 3C by the reverse operation.

Incidentally, there may be cases where the slider of the magnetic head 8 is damaged due to the violent cracking during transportation, for example, due to the fall of the device, but in this case as well, the data on the magnetic disk 6 is retained, so the head 8? A normal restart is possible just by replacing it. It goes without saying that head damage is relatively better than data damage.

Figures ↓ and 5 are diagrams showing another embodiment 7 of the locking mechanism, and show an example in which the left and right sliders 25 and 27 lock the coil bobbin 9 by rotation of the disc 230 around the rotation center of the bin 242. ing.

Further, in the embodiment described above, an example was shown in which the coil bobbin is moved by the left and right sliders, but the locking mechanism is not limited to this embodiment, and other mechanisms may be used.

Furthermore, it is not limited to rotary actuators,
The carriage of the linear actuator may be configured to be locked by being pressed by a slider having the above-mentioned slope.

1 [Effects of the Invention 1 As described above, according to the present invention, since the magnetic head is retracted onto the magnetic disk surface where there is no servo data, it is possible to provide a hunting disk device that does not damage data. .

[Brief explanation of drawings]

Figures 1 and 2 are a plan view and a cross-sectional view of a magnetic disk device according to the present invention. Figures 5 and 4 are explanatory views of the operation of the attuator lock mechanism according to the present invention. Figures 5 and 5 are explanatory views of the operation of the locking mechanism according to other embodiments. DESCRIPTION OF SYMBOLS 1... Pace, 2... Motor, 3... Magnetic disk, 4... Actuator, 5... Actuator base, 6... Pivot shaft, 7... Head arm, 8... Head, 9...Coil bobbin, 10
...Magnet, 11...Bracket, 12...
Rubber stopper, 13... Retract spring, 14...
・Plate spring, 15... left bracket, 16... wing,
17... Bin, 18... Lever, 19... Left slider, 2o... Right slider, 23, 26, 21° 22... Bin, 25... Left bracket, 50...
lever. Representative Patent Attorney Akio Takahashi Figure 3 % 5 Figure M 6 u1

Claims (1)

[Claims] A magnetic disk storage mounting system comprising a magnetic disk having a flying guarantee area and a processing area in which servo data for guaranteeing the flying and positioning of a magnetic head is recorded, and an actuator for positioning the magnetic head on the magnetic disk. . A magnetic disk storage device comprising an actuator lock mechanism capable of retracting the magnetic head above the processing area and returning it above the flying guaranteed area.