JPH08221922A - Magnetic disk device - Google Patents

Abstract

PURPOSE: To enhance the reliability of a magnetic disk device by decreasing the contact areas of magnetic disks and a magnetic head slider, thereby decreas ing the attraction force. CONSTITUTION: The magnetic head slider 1 including the magnetic head is adhered to a supporting spring structural body 2 which elastically supports the magnetic head slider 1 and applies load charge thereon. Approximately the front end of the supporting spring structural body 2 is provided with a flange part 4. A lifting member 5 which loads/unloads the magnetic head slider is inserted between the magnetic disks. Te magnetic head slider 1 is moved to the outer peripheral region of the magnetic disks 3 before the magnetic disk 3 stop rotating when unloading. Next, the lifting member is parallel moved or rotationally moved to bring the lifting member 5 and the flange part 4 into contact after the magnetic disk 3 is subjected CSS and the rotation of the disk stops. The magnetic head slider 1 is inclined in the state of leaning forward to the air inflow end side by riding of the flange part 4 on the lifting member 5.

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, and more particularly to a magnetic disk device having a load / unload mechanism for reducing adhesion to a magnetic head slider when the rotation of the magnetic disk is stopped.

[0002]

2. Description of the Related Art Generally, in a magnetic disk device, a magnetic head slider is in contact with the magnetic disk when rotation of the magnetic disk is stopped, and a magnetic head slider that is in sliding contact with the magnetic disk at low speed rotation at startup is a magnetic disk. When a predetermined number of rotations is reached by the air flow generated as the number of rotations rises, it levitates. On the other hand, a so-called contact start / stop (CSS) method is mainly used in which a magnetic head slider in a floating state at the time of stop continuously slides and stops when the number of rotations drops to a predetermined number of rotations.

Here, in order to achieve a large capacity of the magnetic disk device, the flying gap between the magnetic head slider and the magnetic disk is narrowed. In order to cope with the narrowing of the flying gap and to secure the flying stability of the magnetic head slider, smoothing of the magnetic disk surface is required. However, in the conventional CSS system, if the surface of the magnetic disk is smoothed, there is a problem that when the magnetic head slider and the magnetic disk are in contact with each other, adsorption is caused by the interposition of a lubricant or water when the rotation is stopped. This allows
There is a possibility that the rotation cannot be started, or in the worst case, the magnetic disk or the support spring structure is damaged, which hinders the normal exchange of magnetic information.

To solve this problem, in recent years, the magnetic head slider and the magnetic disk are separated from each other when the rotation of the magnetic disk is stopped, and the magnetic head slider is brought close to the magnetic disk immediately before or during the start of rotation. A mechanism has been proposed. For example, Japanese Patent Laid-Open No. 5-2
No. 66621, a load bar of a load / unload mechanism that operates independently of a rotary actuator is provided between a support spring structure and a magnetic disk, and the support spring structure is placed on the load bar to separate the head slider. A method of making it known is known. Further, as in Japanese Patent Laid-Open No. 6-5028, there is a method in which a load / unload bar is inserted between a magnetic disk and a support spring structure and a magnetic head slider is moved away from or close to the magnetic disk by a piezoelectric element.

[0005]

By the way, the magnetic head slider is being reduced in size and weight in order to improve the flying characteristics and to reduce the impact force at the time of contact with the magnetic disk due to the inclusion of dust or the like. As a result, the distance between the support spring structure and the magnetic disk tends to be narrowed inevitably.

Further, in order to increase the capacity of the magnetic disk device, the number of magnetic disks stacked on the rotating shaft is increased. This allows the spacing between magnetic disks,
The spacing between the backsides of the support spring structures also tends to narrow.

However, in the above-mentioned prior art, since the distance for separating the magnetic head slider in the back direction is large, the distance between the magnetic disks is inevitably large. This makes it difficult to cope with the increase in capacity of the magnetic disk device.

An object of the present invention is to reduce adsorption by using a load / unload mechanism having a small separation distance between a magnetic head slider and a magnetic disk, which corresponds to a large capacity of the magnetic disk apparatus. Achieving high reliability.

[0009]

A magnetic head slider having a magnetic disk, a magnetic head facing the rotating magnetic disk for transmitting and receiving magnetic information, and a magnetic head slider for elastically supporting the magnetic head slider to apply a load load. A supporting spring structure to be provided and a load / load for moving the magnetic head slider away from the magnetic head slider rearward direction or toward the air bearing surface direction.
In a magnetic disk device including an unload mechanism,
A part of the magnetic head slider is in contact with the magnetic disk when the magnetic head slider is unloaded.

[0010]

According to the present invention, when the rotation of the magnetic disk is stopped, a part of the magnetic head slider is brought into contact with the magnetic disk so that the magnetic disk is in an unloading state. The force can be reduced. Further, at this time, the amount of movement of the magnetic head slider in the back direction can be minimized. As a result, the distance between the magnetic disks can be made much narrower than in the conventional case, so that the capacity of the magnetic disk device can be increased. Further, as an additional effect, since a part of the magnetic head slider is in contact with the magnetic disk during unloading, the impact with the magnetic disk during loading can be mitigated.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a magnetic head slider, 2 is a support spring structure, and 3
Is a magnetic disk, 4 is a flange portion, and 5 is a slope-shaped lifting / lowering agent having a load / unload function.

As shown in FIG. 1, a magnetic head slider 1 having a magnetic head (not shown) is bonded to a support spring structure 2 that elastically supports the magnetic head slider 1 and applies a load. A flange portion 4 is provided substantially at the tip of the support spring structure 2, and an elevating member 5 for loading / unloading the magnetic head slider is inserted between the magnetic disks. Fig. 2 shows the state during unloading. In the operation during unloading, first, the magnetic head slider 1 is moved to the outer peripheral area of the magnetic disk 3 before the rotation of the magnetic disk 3 is stopped. Next, CSS is performed to stop the rotation of the magnetic disk, or after reaching a sufficiently low speed, the elevating member is moved in parallel or rotationally to bring the elevating member 5 into contact with the flange portion 4. When the flange portion 4 rides on the elevating member 5, the magnetic head slider 1 is inclined toward the air inflow end side in the forward leaning state. As a result, the contact area can be reduced, and the attraction force between the magnetic head slider and the magnetic disk can be reduced.

FIG. 3 shows another embodiment of this embodiment, and FIG. 4 shows the operating state. A flange portion 4 is provided substantially at the tip of the support spring structure 2 and in the outer peripheral direction of the magnetic disk 3. In the operation during unloading, first, the magnetic head slider 1 is moved to the outer peripheral area of the magnetic disk 3 before the rotation of the magnetic disk 3 is stopped (a). Next, after performing CSS (b), the lifting member 5 and the flange portion 4 are brought into contact with each other by the rotation operation of an actuator (not shown) for positioning the magnetic head slider on a predetermined track, and the flange portion 4 rides on the lifting member. By (c), the unloading operation is completed. At this time, a part of the magnetic head slider is in contact with the magnetic disk. It should be noted that the loading operation is accomplished by performing the reverse operation of the unloading operation.

FIG. 5 shows another embodiment of this embodiment. In the figure, 6 is a spacer ring, and 7 is a slope-shaped notch provided in the spacer ring. The operation at the time of unloading and the operation at the time of loading are almost the same as the case of FIG.
Before the rotation is stopped, the magnetic head slider 1 is moved to the inner peripheral area of the magnetic disk 3. Next, CSS is performed, and after the rotation of the magnetic disk 3 is stopped or when the rotation speed reaches a sufficiently low speed, the notch portion 7 of the spacer ring and the flange portion 4 are brought into contact with each other by the rotation operation of the actuator (not shown). The unloading operation is completed when the flange portion 4 rides on the notch portion 7. It should be noted that the loading operation is accomplished by performing the reverse operation of the unloading operation.

In the embodiment shown in FIGS. 3 and 5 of the present invention, it is not necessary to provide an operating portion in the loading / unloading mechanism of the slope-shaped elevating member or the spacer ring having the slope-shaped notch. The structure can be simplified as compared with the embodiment of FIG. Further, the effect of reducing the attraction phenomenon can be provided by using a means for reducing the attraction at the contact portion between the magnetic head slider and the magnetic disk during unloading, for example, rough surface treatment or coating treatment with a plastic material. Further, the contact state between the magnetic head slider and the magnetic disk during unloading may be indirect contact via a lubricant, not solid contact. Further, although the floating magnetic head slider has been described as an example in the present embodiment, a so-called contact recording method in which the magnetic disk and the magnetic head slider are in continuous contact with each other to exchange magnetic information may be used. .

[0017]

According to the present invention, since the contact area between the magnetic disk and the magnetic head slider can be reduced, the attraction force can be reduced, and at the same time, the gap between the magnetic disks can be narrowed. As a result, high reliability and large capacity of the magnetic disk device can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a magnetic disk device according to an embodiment of the present invention.

FIG. 2 is a side view showing a state during unloading of the present invention.

FIG. 3 is a diagram showing a magnetic disk device according to another embodiment of the present invention.

FIG. 4 is a side view showing an operating state of the present invention.

FIG. 5 is a diagram showing a magnetic disk device according to still another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magnetic head slider, 2 ... Support spring structure, 3 ... Magnetic disk, 4 ... Flange part, 5 ... Elevating member, 6 ... Spacer ring, 7 ... Notch part.

Claims (3)

[Claims] 1. A flange of a support spring structure having a flange portion of which a substantially tip portion extends in the outer peripheral direction of the magnetic disk, and the outer peripheral side of the magnetic disk, wherein the support spring structure is a magnetic disk. A load / unload mechanism including a slope-shaped lifting member that lifts the magnetic head slider in a direction away from the magnetic disk when moving to the outer peripheral side and lowers in a direction that approaches when moving to the inner peripheral side. A magnetic disk device characterized by having. 2. The magnetic disk drive according to claim 1, wherein the load / unload mechanism is arranged out of the plane of the magnetic disk and is immovable. 3. A spacer ring for providing a predetermined space between the flange portion of a support spring structure having a flange portion having a substantially tip portion extended in the inner circumferential direction of the magnetic disk and the magnetic disk laminated on the rotating shaft. In addition, when the support spring structure moves to the inner circumference side of the magnetic disk, the magnetic head slider is lifted in a direction away from the magnetic disk, and when the support spring structure moves to the outer circumference side, it is lowered in the approaching direction. A magnetic disk device comprising a cutout portion.