JPH05135526A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To provide a magnetic disk device having an NCSS mechanism capable of loading and unloading a magnetic head in the optimum condition. CONSTITUTION:A lift mechanism 4 for retracting the magnetic head 1 to the outside of the surface of a magnetic disk 5 is provided on the inner circumferential side, and supporting the magnetic head 1 to be loaded and unloaded under such a state that the lengthwise direction of an air bearing surface of the magnetic head 1 is always inclined to time rotational direction of the magnetic disk 5 in a plane parallel to the surface of the magnetic disk 5. Since loading and unloading are performed in a position where a linear velocity on the inner circumferential side is slow, damage due to contact between the magnetic head 1 and the magnetic disk 5 is diminished. Then, by loading and unloading the magnetic head 1 not to make the air bearing surface parallel to the rotational direction of the magnetic disk 5, influence by a rotary flow of the magnetic disk 5 is compensated, and the contact between the magnetic head 1 and the magnetic disk 5 at the time of loading and unloading is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in a magnetic disk apparatus having a non-contact start / stop (NCSS) mechanism, is less likely to damage the magnetic disk surface when the magnetic head is loaded or unloaded. The present invention relates to a magnetic disk device.

[0002]

2. Description of the Related Art In a conventional NCSS mechanism, an actuator is driven to the outermost circumference when a magnetic disk is stopped, and a flexure is lifted by a lift mechanism or the like at the outer circumference to unload the magnetic head out of the surface of the magnetic disk. Similarly, when the disk starts rotating, the magnetic head is loaded on the surface of the magnetic disk by using the lift mechanism or the like. Also, on the innermost side,
The magnetic head is attached to the flexure so that an angle (hereinafter referred to as a skew) formed by the longitudinal direction of the air bearing surface of the magnetic head and the rotation direction of the magnetic disk in a plane parallel to the plane of the magnetic disk is approximately 0 °.

FIG. 4 shows an example of a conventional magnetic disk device incorporating an NCSS mechanism on the outer peripheral side.

In FIG. 4, 1 is a magnetic head, 3 is an actuator, and 4 is a lift mechanism.

FIG. 5 is a perspective view of the magnetic disk device shown in FIG. In FIG. 5, 1 is a magnetic head, 2 is a flexure, 4 is a lift mechanism, and 13 is a moving direction of the flexure.

As shown in FIGS. 4 and 5, a part of the flexure 2 is slid by the inclined portion of the lift mechanism 4 installed on the outermost peripheral portion of the magnetic disk 5 to move the magnetic head 1 up and down.

[0007]

However, in the above-mentioned structure, by loading and unloading at the position where the linear velocity on the outer peripheral side is the highest, the magnetic disk is contacted when it comes into contact with the magnetic head. There is a problem that it is easily damaged. Also, load further on the innermost side,
In the case of unloading, if the conventional method is used, loading and unloading will be performed with the skew being 0 °, and it will be easily affected by the rotational flow of the magnetic disk. When loading or unloading while tilting in the disk direction, in the reverse wedge type minute gap (hereinafter, negative pressure generating part) formed between the air bearing surface of the magnetic head and the magnetic disk with respect to the rotation direction of the magnetic disk,
A force such as negative pressure that attracts the disk is easily generated, and the magnetic head easily contacts the magnetic disk. The present invention provides a magnetic disk device that reduces the contact between the magnetic head and the magnetic disk and enables an NCSS mechanism that is unlikely to damage the magnetic disk even if they come into contact with each other.

[0008]

In order to solve the above problems, the magnetic disk apparatus of the present invention loads and unloads the magnetic head on the innermost side of the magnetic disk in a state where the skew does not become 0 ° at all. The magnetic head is supported by the flexure so that the inflow end side of the magnetic head is farther from the magnetic disk than the outflow end side when the magnetic head comes closest to the magnetic disk when loaded. ..

[0009]

According to the present invention, with the above-described structure, the magnetic head is loaded in a portion having a smaller linear velocity, and damage caused by contact with the magnetic disk can be reduced. Further, by loading and unloading the magnetic head in the skewed state, the formation of the negative pressure generating portion can be reduced, and the contact of the magnetic head can be made more difficult.
Further, by supporting the magnetic head in advance so as not to approach the magnetic disk from the inflow end side of the magnetic head, it is possible to further suppress the formation of the negative pressure generating portion.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic disk device according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a magnetic head, 2 is a flexure, 3 is an actuator, 4 is a lift mechanism, 5 is a magnetic disk, and 6 is a motor.

In this embodiment, a lift mechanism 4 having an inclined portion on the inner peripheral side as shown in the drawing is provided, and when the magnetic disk 5 is stopped, the actuator 3 is driven to the inner peripheral side, and a part of the flexure 2 is driven. The magnetic head 1 is slid on the inclined portion of the lift mechanism 4 to load and unload the magnetic head 1 out of the surface of the magnetic disk 5. In addition, in the area where loading and unloading are performed, that is, in the area where there is a slope, the skew is zero.
The magnetic head 1 is supported by the flexure 2 so as not to be at a temperature of 0 °.

The operation of the magnetic disk device configured as described above will be described with reference to FIG.

In FIG. 2, 1 is a magnetic head, 5 is a magnetic disk, 7 is an air bearing surface of the magnetic head, 8 is a loading / unloading point of the magnetic head, 9 is a rotating direction of the magnetic disk, and 10 is a skew. ..

As shown in the figure, the magnetic head 1 is loaded and unloaded with the skew. In the magnetic disk device configured as described above, first, by loading and unloading the magnetic head on the inner circumference side where the linear speed of the magnetic disk is slow, the outer circumference side where the linear speed is fast even when contacting the magnetic disk. The damage is smaller than in the case of. Further, by loading and unloading the magnetic head in a skewed state, the formation of a negative pressure generating portion when the magnetic head and the magnetic disk approach each other is prevented, and the magnetic head and the magnetic disk during loading and unloading are prevented. Can reduce contact.

In the second embodiment, the structure of the magnetic disk device is almost the same, so the description thereof is omitted here, but the operation thereof will be described with reference to the drawings.

In FIG. 3, 1 is a magnetic head, 5 is a magnetic disk, 9 is the rotating direction of the magnetic disk, 11 is an inflow end of the magnetic head, and 12 is an outflow end of the magnetic head.

As shown in the figure, the magnetic head 1 has a magnetic disk 5
The magnetic head 1 is supported by the flexure 2 so that the inflow end side of the magnetic head 1 is farther from the magnetic disk 5 than the outflow end side when the magnetic head 1 is closest to. Therefore, it becomes difficult to form an inverted wedge-shaped gap between the magnetic head 1 and the magnetic disk 5 in the rotating direction of the magnetic disk 5, and it is possible to suppress the formation of the negative pressure generating portion.

[0019]

As described above, the present invention reduces the contact between the magnetic head and the magnetic disk during loading and unloading by loading and unloading the magnetic head on the inner peripheral side and in a skewed state. Moreover, the damage at the time of contact can be reduced. Further, by mounting the magnetic head on the flexure so that the inflow end side of the magnetic head does not come closest to the magnetic disk first, it is possible to suppress the formation of the negative pressure generating portion and further reduce the contact between the magnetic head and the magnetic disk. Therefore, with the configuration of the present invention, a more reliable magnetic disk device can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a magnetic disk device of the present invention.

FIG. 2 is an operation diagram of the device.

FIG. 3 is an operation diagram of the second embodiment.

FIG. 4 is a configuration diagram of a conventional magnetic disk device including an NCSS mechanism on the outer peripheral side.

FIG. 5 is a schematic perspective view of the device.

[Explanation of symbols]

 1 magnetic head 2 flexure 3 actuator 4 lift mechanism 5 magnetic disk 6 motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Goso 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A magnetic disk, means for rotationally driving the magnetic disk, and a plurality of air bearing surfaces for reading and writing signals on the magnetic disk surface and for levitating on the magnetic disk with very small gaps. A magnetic head including: a magnetic head that includes a flexure that drives the magnetic head on the magnetic disk in a swinging or linear manner and elastically supports the magnetic head; In a magnetic disk device comprising means for retracting to the outside of the magnetic disk surface when stopped, the magnetic head is on the innermost peripheral side of the magnetic disk, and the magnetic head is in a plane parallel to the magnetic disk plane. Load and unload with the longitudinal direction of the air bearing surface inclined relative to the rotating direction of the magnetic disk. Magnetic disk drive. 2. The flexure is attached so that the inflow end side of the magnetic head is farther from the magnetic disk than the outflow end side when the magnetic head is closest to the magnetic disk. The magnetic disk device described.