JPH0684313A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To obtain a magnetic disk device which and has high reliability and has a large capacity and by which the loading/unloading of a magnetic head is performed while the magnetic head comes not into contact with the magnetic disk and a recording area is not reduced. CONSTITUTION:By providing a spoiler 13 which is close to the magnetic disk 12 and rotatably movable and, with the spoiler 13 rotating and moving by means of an air flow generated by the rotation of the magnetic disk 12, by detaching a flexure 15 retained on an unloading plate 17 which is integrated with the spoiler 13, the loading of the magnetic head 11 is performed on the magnetic disk 12. Also, with the rotation of the magnetic disk 12 being stopped, by returning the spoiler 13 to a predetermined position through the force of a return spring and retaining the flexure 15 on the unloading plate 17 which is integrated with the spoiler 13, the unloading of the magnetic head 11 from the magnetic disk 12 is performed. Thus, at the time of loading/unloading of the magnetic head, the magnetic head is not inclined, and therefore no damage is caused by coming into contact with the magnetic disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device used for recording / reproducing information, and more particularly to a magnetic disk device adopting a load / unload method for floating a magnetic head on a magnetic disk.

[0002]

2. Description of the Related Art Conventionally, a loading method of a magnetic disk apparatus used for recording and reproducing information is such that a magnetic head and a magnetic disk are in contact with each other when the apparatus is stopped, and a magnetic disk mounted on a spindle motor when the apparatus is started. As the disk rotates, the magnetic head generates a positive pressure on the slider surface and levitates above the magnetic disk. Further, a contact start / stop method (hereinafter referred to as a CSS method) is used in which, when the apparatus stops, the magnetic head and the magnetic disk come into contact with each other to stop.

In recent years, due to the high density of magnetic recording, it has been required to increase the recording capacity of a magnetic disk device. For that purpose, it is necessary to further reduce the flying height of the magnetic head. In order to reduce the flying height, it is required to make the slider surface of the magnetic head and the surface of the magnetic disk super flat or mirror-finished. However, if this is done, in a magnetic disk device using the CSS system, adsorption tends to occur between the magnetic head and the magnetic disk,
The spindle motor for rotating the magnetic disk may not be able to start. Further, in the case of the CSS method, the magnetic head and the magnetic disk oscillate when the magnetic disk device is started and stopped, and they may be worn, resulting in dust generation. With the lowering of the flying height of the magnetic head, minute dust, which has not been a problem in the past, causes a magnetic head crash, and as a result, information cannot be recorded / reproduced, which has been a serious problem in reliability of the magnetic disk device.

Therefore, even if the flying height of the magnetic head is reduced due to the high density of the magnetic recording, the problem of reliability of the magnetic disk device, such as magnetic head attraction and crush, is still unsolved. This is an important issue in increasing the capacity of the.

At present, in order to solve the above problems, the magnetic head and the magnetic disk are always operated in a non-contact state regardless of the stop of the magnetic disk apparatus, that is, a non-contact unload state when the magnetic disk apparatus is stopped, A magnetic disk device has been developed that realizes a load state in which a magnetic head flies over a magnetic disk when the magnetic disk device is activated. Here, the configuration of the load / unload system of this magnetic disk device will be described with reference to FIG. Figure 6
FIG. 4 is a partial perspective view showing a state when the magnetic disk device is operating, and shows a loaded state in which the magnetic head 1 floats above the magnetic disk 2. The magnetic head 1 is swingably supported by a flexure 3, and the flexure 3 is supported by an arm 4. When the magnetic disk device is stopped, the flexure tab 5 at the tip of the flexure 3 is mounted on a ramp 6 which is close to the magnetic disk 2 and fixedly supported on the base, and the magnetic head 1 is separated from the magnetic disk 2 and is in an unloading state. .

Next, the operation of the load / unload system of the magnetic disk device shown in FIG. 6 will be described with reference to FIGS. 7 (a) to 7 (c). First, when the magnetic disk device is started up, as shown in FIG. 7A, the magnetic head 1 leaves the magnetic disk 2 and is in an unload state in which the flexure tab 5 is mounted on the ramp 6. When the magnetic head 1 shifts from the unload state to the load state and the magnetic disk 2 rotates and becomes a steady rotation, an actuator (not shown) attached to the arm 4 causes the magnetic disk 2 to move as shown in FIG.
As shown in, the magnetic head 1 moves toward the magnetic disk 2 at a low speed. Further, the magnetic head 1 moves and the ramp 6
The magnetic disk 2 is separated from the magnetic disk 2, and the magnetic disk 2 is levitated on the magnetic disk 2 as shown in FIG. 7C. When the magnetic disk device is stopped, the reverse operation described above is performed to change the load state to the unload state.

[0007]

However, the conventional configurations shown in FIGS. 6 and 7 have the following problems. That is, in the conventional magnetic disk apparatus, when the load operation is performed, that is, when the flexure tab 5 leaves the ramp 6 and floats above the magnetic disk 2, the magnetic head 1 tilts and stable flying cannot be performed. When the magnetic head 1 contacts the surface of the magnetic disk 2 or when the unload operation is performed, that is, when the flexure tab 5 is mounted on the ramp 6, the magnetic head 1 tilts and the magnetic head 1 contacts the surface of the magnetic disk 2. However, there is a problem that the surface of the magnetic disk 2 is damaged, the information written on the magnetic disk 2 is lost, and a magnetic head crashes during load / unload. further,
Since the ramp 6 is located on the outer peripheral portion of the magnetic disk 2, the recording area of the magnetic disk 2 is reduced, which poses a problem of hindering an increase in capacity of the magnetic disk device.

The present invention solves such a problem by providing a large capacity with high reliability in which the magnetic head is loaded and unloaded without coming into contact with the magnetic disk and the recording area is not reduced. It is an object of the present invention to provide a possible magnetic disk device.

[0009]

In order to solve this problem, a magnetic disk device of the present invention comprises a magnetic disk for recording / reproducing information, and a magnetic head for recording / reproducing information on / from this magnetic disk. A flexure for swingably supporting the magnetic head, and a spoiler rotatably movable to an operating position by an air flow generated by the rotation of the magnetic disk from a stop position which is close to the magnetic disk and positionally controlled by a stopper. The magnetic disk is rotated, the spoiler is rotated to the operating position, and the flexure held by a member integral with the spoiler is released to load the magnetic head on the magnetic disk, and the magnetic disk is rotated. When stopped, the spoiler returns to the stop position by the force of the spring, and the spoiler is brought into contact with the spoiler. In which consisted on the magnetic disk to perform the unloading of the magnetic head by the member holding the flexure.

[0010]

According to the present invention, since the magnetic head does not tilt when loading and unloading the magnetic head, it does not come into contact with the magnetic disk and does not damage the magnetic disk, thus destroying information on the magnetic disk. In addition, since the recording area can be used up to the outermost circumference of the magnetic disk, the recording area is not reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a partial perspective view showing a state during operation of the magnetic disk device, and shows a loaded state in which the magnetic head 11 floats above the magnetic disk 12. The spoiler 13 is rotationally moved by the airflow generated by the rotation of the magnetic disk 12. Also, a part of spoiler 13 has an arm.
An unloading plate 17 for holding the flexure tab 16 at the tip of the flexure 15 supported by 14 is provided. Further, the flexure tab 16 is formed with a hemispherical pivot 18 on a surface that resists the magnetic disk 12, so that the hemispherical pivot 18 contacts the elliptical hole 17a of the unload plate 17 when the magnetic disk device is stopped. It is arranged.

The magnetic head 11 is supported by a flexure 15 as shown in FIG. The tip of the flexure tab 16 is provided with a tongue piece 16a that curves in a direction opposite to the magnetic disk 12 so that it can easily contact the unloading plate 17 during unloading operation.

Next, the configuration of the load / unload device of the magnetic disk drive of this embodiment will be described with reference to FIG. The load / unload device is fixedly supported on the base close to the magnetic disk 12, and the spoiler 13 has a shaft 19
It is possible to rotate around. In addition, the center of gravity of the load / unload device is located on the shaft 19 at the mounting portion to the shaft 19, and a balancer 20 is provided to improve impact resistance. When the magnetic disk device is operating, the spoiler 13 is the magnetic disk 12
The pressure is applied by the air flow generated by the rotation of, and it overcomes the force of the return spring 21 and can rotate about the shaft 19. When the magnetic disk device is stopped, the spoiler 13 is returned to its home position by the force of the return spring 21.
At this time, the balancer 20 is positionally regulated by the stopper 22 so that the hemispherical pivot 18 of the flexure tab 16 can be returned to the position where it can be held in the elliptical hole 17a of the unloading plate 17.

The operation of the load / unload method of the magnetic disk device of the present embodiment configured as described above will be described with reference to FIGS. 5 (a) to 5 (c). First, when the magnetic disk device is activated, as shown in FIG. 5A, the magnetic head 11 leaves the magnetic disk 12 and the flexure tab 16 is placed in the unloading plate 17 in an unloading state. There is. Next, when the magnetic head 11 shifts from the unload state to the load state, the magnetic disk 12 starts to rotate, and the unload plate 17 causes the air flow generated by the rotation of the magnetic disk 12 as shown in FIG. Will start moving together with the spoiler 13. Further, as the spoiler 13 rotates and the unloading plate 17 moves accordingly, the spoiler 13 shown in FIG.
As shown in (c), the magnetic head 11 is in a loaded state of floating above the magnetic disk 12.

Next, when the magnetic disk device is stopped, the counter electromotive force generated in the spindle motor when the rotation of the magnetic disk 12 is stopped is sent to the actuator, so that the actuator is moved and the magnetic head 11 is moved to the outer periphery of the magnetic disk 12. Rotate slowly in the direction. Immediately thereafter, the rotation of the magnetic disk 12 stops and the spoiler
13 begins to rotate to the unloading position by the force of the return spring 21. When the spoiler 13 reaches the tip of the flexure tab 16, the unloading plate 17 enters between the flexure tab 16 and the magnetic disk 12, and the spoiler 13 rotates and moves, and the pivot 18 forms an elliptical hole in the unloading plate 17. It is held at 17a.

As can be seen from the above configuration and operation, in the magnetic disk device of this embodiment, the tongue piece at the tip of the flexure tab 16 is set at the moment of loading when starting the magnetic disk device.
Since the surface 16a and the unloading plate 17 are in contact with each other, the magnetic head 11 is loaded without tilting with respect to the surface of the magnetic disk 12 as in the conventional example, so that the magnetic head 11 contacts the magnetic disk 12. Can be loaded without At the moment of unloading when the magnetic disk device is stopped, the tongue piece 16a at the tip of the flexure tab 16 and the unloading plate 17 come into surface contact with each other and are mounted on the unloading plate 17, so that the magnetic head 11 is mounted on the magnetic disk 12. The magnetic head 11 can be unloaded without contacting the magnetic disk 12 because the magnetic head 11 is unloaded without tilting as in the conventional example.

Further, when the magnetic disk device is operating, unlike the conventional magnetic disk device, there is no ramp on the outer circumference of the magnetic disk and the spoiler 13 is rotationally moved by the air flow. Since the spoiler 13 and the magnetic head 11 do not come into contact with each other even when the outer peripheral portion of the magnetic disk 12 is levitated, the outer peripheral portion of the magnetic disk 12 can be used as a recording area. Therefore, in the magnetic disk device of this embodiment, the magnetic head 11 is
It is possible to realize a magnetic disk device having a high capacity capable of loading and unloading the magnetic head 11 without contacting the magnetic head 12 and reducing the recording area.

Although a flexure tab and a pivot are provided as means for holding the flexure of the magnetic disk device of this embodiment on the spoiler, the shape of the flexure as the holding means is not particularly limited. Further, the shape of the spoiler is not particularly limited as long as it has a movable means and a flexure holding means which is operated by an air flow generated from a rotating magnetic disk and is returned by a return spring when the magnetic disk device is stopped. Similarly, the material of the spoiler and its surface treatment are not limited.

[0019]

As described above, according to the magnetic disk device of the present invention, the spoiler has a spoiler which is close to the magnetic disk and can be rotationally moved, and the air flow generated by the rotation of the magnetic disk causes the spoiler to rotationally move. The magnetic head is loaded on the magnetic disk by releasing the flexure held by the member that is integrated with the spoiler, and the rotation of the magnetic disk is stopped. By holding the flexure and unloading the magnetic head from above the magnetic disk, the magnetic head does not tilt when unloading the magnetic head, so it does not come into contact with the magnetic disk and damage it, and the recording area of the magnetic disk It is possible to realize a high-capacity magnetic disk device with high reliability, since

[Brief description of drawings]

FIG. 1 is a partial perspective view of a magnetic disk device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the flexure tab.

FIG. 3 is a perspective view of the flexure.

FIG. 4 is a perspective view of a load / unload device provided in the magnetic disk device.

FIG. 5 is an operation explanatory diagram of the magnetic disk device.

FIG. 6 is a partial perspective view of a conventional magnetic disk device.

FIG. 7 is an operation explanatory diagram of a conventional magnetic disk device.

[Explanation of symbols]

 11 magnetic head 12 magnetic disk 13 spoiler 14 arm 15 flexure 16 flexure tab 16a tongue piece 17 unloading plate 17a hole 18 hemispherical pivot 19 axis 20 balancer 21 return spring 22 stopper

Claims (3)

[Claims] 1. A magnetic disk for recording / reproducing information, a magnetic head for recording / reproducing information on / from the magnetic disk, a flexure for swingably supporting the magnetic head, and a proximity to the magnetic disk. And a spoiler that can be rotationally moved to the operating position by the airflow generated by the rotation of the magnetic disk from the stop position where the position is regulated by the stopper, and the spoiler rotates to the operating position by rotating the magnetic disk. The magnetic head is loaded on the magnetic disk by releasing the flexure held by a member integrated with the spoiler, and the rotation of the magnetic disk is stopped, so that the spoiler returns to the stop position by the force of the spring and the spoiler is returned. By holding the flexure on a member integrated with A magnetic disk device configured to unload the magnetic head. 2. The magnetic disk device according to claim 1, wherein a tongue piece curved in a direction opposite to the magnetic disk is provided at a tip of the flexure. 3. The magnetic disk drive according to claim 1, wherein a hemispherical pivot that abuts a hole provided in a member integral with the spoiler is provided at the tip of the flexure.