JPH05266620A - Magnetic disc unit - Google Patents

Abstract

PURPOSE:To enhance impact resistance by retreating a slider to an outer radial region of a magnetic disc when a magnetic disc unit is not working. CONSTITUTION:Upon turn OFF of power of a magnetic disc unit, an arm 7 moves to the outer peripheral side of a magnetic disc 4 and thereby a suspension 1 and a slider 3 supported at the tip of the arm 7 also move to the outer peripheral side of the magnetic disc 4. Since the magnetic disc 4 is rotating, at that time, at a speed defined by the inertia the slider 3 moves while floating. The floating operation is stabilized through balance of force and thereby the slider 3 does not contact with the surface of magnetic disc nor vibrate during movement.

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.

[0002]

2. Description of the Related Art In recent years, magnetic disk devices have been extensively used, and flying sliders are widely used in consideration of the durability of the magnetic disk surface, but structural consideration is required so as not to destroy the magnetic disk surface. This slider is generally called a positive pressure slider and is a flexible member (hereinafter referred to as suspension).
The magnetic disk surface is fixed to the arm via the, and the magnetic disk surface is scanned according to the operation of the arm while levitating the surface of the rotating magnetic disk by the effect of the air film. A magnetic disk device using a positive pressure slider has a process in which a head slides on the disk when the disk rotates and stops.
As a result, wear may occur between the head and the disk, resulting in a crash. In addition, since the head is in contact with the disk when not in operation, the head is attracted to the disk and the spindle motor cannot rotate. Therefore, instead of the positive pressure slider, a negative pressure slider in which the slider and the head do not contact each other when not in operation has been considered and has been developed for practical use. FIG. 5 shows a state of a slider of a magnetic disk device using a conventional negative pressure slider. FIG. 5 (a) shows an operating state and FIG. 5 (b) shows a non-operating state. The negative pressure slider 3 is separated from the magnetic disk 4. In the negative pressure slider, a positive pressure to move away from the disc and a negative pressure to suck it to the disc act on the air bearing surface, and the disc surface is maintained at a position where it balances the external force while maintaining a constant floating gap with the disc surface. To scan. When the magnetic disk is stopped, the negative pressure slider loses its attraction to the magnetic disk and is supported on the data area of the disk at a position apart from the disk surface. Also, even if the disc is rotated from the stopped state, the negative pressure slider remains at a position away from the disc surface, so it is necessary to load the slider onto the disc when recording / reproducing data.
This required an external actuator.

[0003]

Recently, with the spread of magnetic disk devices, the environment in which the magnetic disk devices are used has expanded, and it has been required to improve the shock resistance of the magnetic disk devices. However, in a conventional magnetic disk drive using a negative pressure slider, the negative pressure slider is stopped facing the disk surface at a predetermined distance, so that the slider hits the disk surface by external vibration or the like. There was a problem in impact resistance such as destruction of. Further, if the rigidity of the suspension is increased for the purpose of suppressing this vibration and for quickly separating the slider from the disk surface during the stopping operation, vibration due to the elasticity of the suspension occurs when the slider is unloaded from the disk surface. There is also a problem to do. In addition, an external actuator is required to load the slider onto the disk during recording / reproducing of data, which results in high cost and increased power consumption due to an increase in the number of moving parts, and the actuator operation reliability is lacking. there were. The present invention is to solve the above problems,
Improving shock resistance, without damaging the disk surface by the slider coming into contact with the magnetic disk or vibrating and hitting when the magnetic disk device is not operating, and suppressing cost and power consumption. It is an object of the present invention to provide a magnetic disk device that is operationally reliable.

[0004]

In order to achieve the above object, the present invention has a slider positioned outside the disk diameter region when not in operation, and a suspension for supporting the slider is provided with an anti-vibration member so that the slider faces the data region side. Provide a load ramp on the side opposite to the magnetic disk with respect to the slider, which is composed of a part parallel to the disk and a part having a slope toward the disk that exerts a force so that the slider loads onto the disk when seeking. It was done like this.

[0005]

Therefore, according to the present invention, the impact resistance of the magnetic disk drive is improved and the number of moving parts in the magnetic disk drive is reduced.

[0006]

1 is a plan view and FIG. 1B is a side view showing the structure of the main part of a magnetic disk device according to an embodiment of the present invention. In FIG. 1, 1 is a suspension, 2 is a road ramp, 3 is a negative pressure slider, 4
Is a magnetic disk, 5 is a spindle motor, 6 is an anti-vibration member, 7 is an arm, 8 is a magnetic disk base,
A negative pressure slider 3 having a magnetic head for recording / reproducing data is supported by a tip portion of a suspension 1, the other end of the suspension 1 is fixed to an arm 7, and a vibration preventing member 6 is attached to its flexible surface. To be done. The suspension 1 is bent in a direction away from the magnetic disk. The magnetic disk 4 is fixed to the rotating shaft of the spindle motor 5. The configuration of the load lamp 2 is shown in FIG. In FIG. 2, one end of the load ramp is fixed to the base 8 of the magnetic disk device. The upper portion of the load ramp is composed of a portion 2a parallel to the disc and a portion 2b having a slope on the disc side. The constituent positions of the constituent elements 2a and 2b of the load ramp 2 are on the side opposite to the disk with respect to the suspension 1 and the arm 7. Further, the outer peripheral edge of the disk surface is processed so as to end with a gentle slope.

Next, the operation of the above embodiment will be described. When the power of the magnetic disk device is turned on, the spindle motor 5
Then, the magnetic disk 4 rotates, and the suspension 1 and the arm 7 supporting the negative pressure slider move to the inner peripheral side of the disk. At this time, the road lamp 2 is the suspension 1
The work to be performed on will be described with reference to FIG. In FIG. 3, 2 is a load ramp, 4 is a magnetic disk, 1 is a suspension, and 3 is a negative pressure slider. FIG. 3A shows a positional relationship between the load ramp 2 and the suspension 1 when the magnetic disk device is in a stopped state. The slider attached to the tip of the suspension 1 is located outside the magnetic disk 4 as shown in the figure. After that, when the power of the magnetic disk device is turned on, the arm 7 moves to the inner peripheral side of the magnetic disk, so that the suspension 1 fixed to the arm also moves parallel to the magnetic disk 4 to the inner peripheral part of the magnetic disk. To do. When the suspension 1 continues to move to the inner peripheral side, the suspension 1 comes into contact with the slope portion 2b of the load ramp 2 and receives a downward force from the load ramp. As a result, the suspension 1 is pushed and bent toward the disk 4 side, and the slider is brought closer to the magnetic disk side (FIG. 3 (B)). Further, when the arm continues to move toward the inner circumference of the magnetic disk, the suspension 1 receives a downward force from the load ramp 2, and the suspension 1 is bent toward the magnetic disk 4 (Fig. 3 (C)). ),
Further, the negative pressure slider 3 approaches the magnetic disk 4,
Eventually, it moves to the levitating state (Fig. 3 (D)). When the power of the magnetic disk device is turned off, the arm 7 moves to the outer peripheral side of the magnetic disk, and the suspension 1 and the slider 3 supported by the tip of the arm also move to the outer peripheral side of the magnetic disk. At this time, since the magnetic disk 4 is rotating at a high speed due to its inertia, the slider 3 moves while maintaining the flying state. Since this levitation operation is stable in a state of balance of forces, it does not come into contact with the magnetic disk surface or vibrate during movement. When the slider 3 goes beyond the outer peripheral portion of the magnetic disk 4 and goes out of the radial direction area, the slider 3 loses the negative pressure to be sucked to the side of the magnetic disk 4, and is separated from the magnetic disk surface by the restoring force of the suspension 1. To do. 4A and 4B are a side view and a top view showing the operation of the slider when the power is off. FIG. 4A shows a state where the slider 3 is flying and moving on the surface of the magnetic disk 4 in the outer peripheral direction. 4B shows a state where the slider 3 has reached the outer peripheral portion of the magnetic disk 4, and the slider is still in a flying state. FIG. 4C shows a state where the slider 3 has moved radially beyond the outer circumference of the magnetic disk 4, and the slider 3 that has lost the negative pressure is separated from the extended surface of the disk surface by the restoring force of the suspension 1. It is in. The inclined surface 4a on the outer periphery of the disk has an effect of smoothing the removal of the slider, and the vibration preventing member 6 prevents vibration at the time of removal and prevents the slider from colliding with the disk surface. As described above, when the magnetic disk device is not in operation, the slider exists outside the radial area of the magnetic disk, so that even if external vibration is transmitted to the magnetic disk device, the slider and magnetic disk do not come into contact with each other and the surface of the magnetic disk is It has a structure with excellent impact resistance that is not destroyed. Also, when loading the slider onto the magnetic disk, the number of operating parts can be reduced by using a mechanism that rotates the arm and slides the suspension along the load ramp to reduce cost and power consumption. It is possible and can operate with high reliability.

[0008]

As is apparent from the above embodiment, the present invention makes the slider stand by outside the radial area of the magnetic disk when the magnetic disk device is not in operation, so that even when a strong disturbance is transmitted during non-operation, the slider Does not touch the magnetic disk or vibrate and hit the disk to destroy the disk surface. Also, when loading the slider onto the magnetic disk, the number of moving parts can be reduced by using a mechanism that rotates the arm and slides the suspension along the load ramp to reduce the cost and power consumption. It has an effect that it can operate with high reliability.

[Brief description of drawings]

FIG. 1 is a plan view and a side view of a magnetic disk device according to an embodiment of the present invention.

FIG. 2 is a side view and a front view of the load lamp in FIG.

FIG. 3 is a side view showing a loading state of a negative pressure type slider.

FIG. 4 is a side view and a plan view showing an unloaded state of the negative pressure type slider.

FIG. 5 is a side view of a conventional magnetic disk device during rotation and stop.

[Explanation of symbols]

1 ... Suspension (flexible member), 2 ... Road ramp,
3 ... Negative pressure slider, 4 ... Magnetic disk, 5 ... Spindle motor, 6 ... Vibration prevention member, 7 ... Arm, 8
… Magnetic disk base.

Claims (5)

[Claims] 1. A slider, which scans by a movement of an arm while floating on a magnetic disk surface, is fixed to the arm via a flexible member, and the movement of the arm is performed when the magnetic disk is in a stopped state. Is a magnetic disk device characterized in that the slider is located outside the radial area of the magnetic disk. 2. When the magnetic disk device performs a stop operation, the operation of an arm that causes the slider to scan the surface of the magnetic disk causes the slider to move outside the radial area of the magnetic disk, and the slider is the disk. While flying over the surface, the movement of the arm moves from inside the area of the magnetic disk surface to outside the area, and when the arm moves out of the area of the magnetic disk, the arm moves away from the surface of the magnetic disk. The magnetic disk drive according to claim 1, wherein the magnetic disk drive is a magnetic disk drive. 3. A load ramp having one end fixed to a base of a magnetic disk device and having a portion parallel to the magnetic disk and a portion having an inclined surface on the side of the magnetic disk, wherein the load ramp is a disk with respect to a slider. The arm and the flexible member which are present on the opposite side and move in parallel on the magnetic disk move when the magnetic disk device is translated from outside the area of the magnetic disk to within the area of the magnetic disk. 2. The member comes into contact with the inclined surface of the load ramp, and the flexible member moves along the inclined surface of the load ramp to bring the slider closer to the magnetic disk side and levitate. 2. The magnetic disk device according to 2. 4. The magnetic disk device according to claim 1, wherein a member for preventing vibration is attached on the flexible surface of the flexible member. 5. The magnetic disk device according to claim 1, wherein a negative pressure slider is used as the slider.