JPH03256278A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent a magnetic disk surface from being corroded or broken by fixing a slider to an arm through a flexible member, and moving it outside a zone when a magnetic disk device is stopped. CONSTITUTION:The negative pressure type floating slider 1 provided with a magnetic head is fixed to the tip end part of the flexible member 2, and the other end of the flexible member 2 is fixed to the arm 5, and a vibration preventing member 4 is stuck on its flexible surface. When the power supply of the magnetic disk 7 is turned off, and the magnetic disk is stopped, the arm 5 is rotated around a pivot shaft 10 by the movement of the movable part 11 of a voice coil motor 12. Then, the slider 1 is moved outside the zone of the magnetic disk surface 17 as keep floating state while it continues to receive the negative pressure of an air stream. Then, at the outside of the zone, it is moved to a direction to become more distant form the disk surface 17, and besides, since the vibration preventing member 4 is stuck of it, the slider 1 never comes to give a shock to the disk 7 or cause the corrosion of the disk by its contact or vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the operation of a flying slider that is pressed when a magnetic disk drive is stopped.

Conventional technology In recent years, the use of magnetic disk devices has become popular, and floating sliders are widely used in consideration of the durability of the magnetic disk surface.However, structural consideration must be taken to prevent the magnetic disk surface from being destroyed when the device is stopped. It is.

This slider is generally fixed to an arm via a flexible member (hereinafter referred to as a flexure), and while floating the rotating magnetic disk surface by the effect of an air film, the magnetic disk moves according to the movement of the arm. Scan the surface. The state of the slider when this magnetic disk drive is in a stopped state is shown in a side view in FIG.

The slider 1 is loosely held by a flexure 2 and scans while flying over the surface of the magnetic disk 7. Magnetic disk device force: In the stopped state, the slider remains in the radial region of the magnetic disk, but the state of the slider differs depending on whether the slider is a positive pressure type or a negative pressure type.

A positive pressure slider, which flies by receiving a force (positive pressure) that separates it from the disk 7 in the air film between the magnetic disk surface and the flying surface of the slider 1, has no contact with the magnetic disk when the magnetic disk 7 is stopped. are in contact.

A negative pressure slider receives a force (negative pressure) mainly attracted to the magnetic disk 7 by the air film between the magnetic disk surface 7 and the floating +fsi of the slider 1, and scans the magnetic disk surface in balance with the external force. When the magnetic disk 7 is stopped, it loses the attraction force from the magnetic disk and is separated from the surface.

Problems to be Solved by the Invention In such conventional magnetic disk drives, since the button on the positive pressure slider is in contact with the magnetic disk surface in a stopped state, there is a problem in that the button sticks to the surface and corrodes. . On the other hand, with a negative pressure slider, the button is pushed a predetermined distance and then stopped facing the magnetic disk surface, but there is a phenomenon in which the slider hits the disk surface due to external vibrations, causing the problem of damaging the disk surface. . In addition, if the rigidity of the flexure is increased in order to suppress this vibration or to quickly separate the slider from the disk surface during the stopping process, the flexure will increase when the slider loses negative pressure and separates from the disk surface. There is also the problem that vibrations occur due to the elasticity of the

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a magnetic disk device that does not cause corrosion or destruction of the magnetic disk surface while the magnetic disk device is stopped or in a stopping operation.

Means for Solving the Problems In order to achieve the above object, the present invention includes a slider that scans by the operation of an arm while floating on a magnetic disk surface, the slider being fixed to the arm via a flexible member,
The operation of the arm is to position the slider outside the radial area of the magnetic disk when the disk drive is in a stopped state, and to position the slider outside the radial area of the magnetic disk when the magnetic disk drive is in a stopped state. shall be moved outside the radial area;
The slider moves from inside the area of the magnetic disk surface to outside the area by the operation of the arm while flying and scanning the disk surface, and also moves in a direction away from the magnetic disk surface when it goes outside the area of the magnetic disk. This magnetic disk device has a structure in which a vibration prevention member is attached to the flexible surface of a flexible member (flexure).

Effect of the Invention With the above configuration, the floating slider moves toward the outer circumference of the magnetic disk while maintaining a floating state during the stop operation, and moves in a direction away from the disk surface when it moves out of the disk radial area. .

Further, the vibration prevention member prevents vibration of the slider due to the elasticity of the flexure.

Example Hereinafter, a magnetic disk device according to an example of the present invention will be described.
The explanation will be made with reference to FIG. 1 and FIG. 2. FIG. 1 shows a top view of the configuration of a magnetic disk device according to the present invention. As shown in the figure, a negative pressure floating slider 1 equipped with a magnetic head (not shown) for recording and reproducing data is fixed to the tip of a flexure 2, and the other end of the flexure is fixed to an arm 5. At the same time, the vibration prevention member 4 is attached to the flexible surface. Further, a flexure suppressing member 3 made of a shape memory alloy wire bent into a figure 7 shape is disposed in contact with the flexible surface of the flexure 2, and both ends of the wire are fixed to the flexure connecting portion of the arm 6. Ru. The arm 5 is rotatably supported by a pivot shaft 10 and connected to a movable part 11 of a voice coiflet motor 12.

The arm 5 is provided with a lock hole 6, and has a locking hole 6 with a locking hole 6.
It is locked when the locking member 9 is moved in and out.

Further, a magnetic head (not shown) held by the slider 1 is electrically connected to the electric circuit section 16 via a flexible printed wiring board 16. The magnetic disk 7 is the spindle motor 1
It is fixed to the rotating shaft of 3.

The outer peripheral edge of the magnetic disk surface is processed so that it ends with a gentle slope.

To explain the operation of the above configuration, when the power of the magnetic disk device is turned on, the solenoid coil /l/8 releases the longitudinal direction of the arm 5, and the spindle motor 13 rotates the magnetic disk 7. The slider 1 is drawn onto the surface of the magnetic disk 7 and moved by the air flow.

At this time, a current is applied to the flexure suppressing member 3 to heat it and change it into the memorized shape, thereby bending the flexure 2 toward the magnetic disk, and the slider 1 approaches the magnetic disk. When the slider 1 approaches the surface of the disk 7, a force S is applied to maintain a small gap between the slider 1 and the disk surface by balancing the negative pressure of the air flow, the reaction force of the flexure 2, and the pressing force of the flexure suppressing member 3. levitate and scan.

Magnetic disk device 1'? When the power is turned off, the arm 5 rotates around the pivot shaft 10 by the movement of the movable part 11 of the voice coil motor 12, and moves the slider 1 toward the outer circumference of the magnetic disk 7. At this time, since the magnetic disk 7 is rotating at a high speed due to its inertia, the slider 1 continues to receive the negative pressure of the airflow and moves while maintaining a floating state. Since this floating operation is stable in a state of force balance, there is no possibility of contact with the magnetic disk surface or vibration during movement. When the slider 1 exceeds the outer circumference of the magnetic disk 7 and moves out of the radial region, it loses negative pressure and is separated from the magnetic disk surface by the reaction force of the flexure 2. The flexure suppressing member 3 loses heat from the time the power is turned off, is released from the memorized shape, and does not push the flexure toward the magnetic disk.

FIG. 2 is a side view and a top view showing the operation of the slider when the power is turned off, (al indicates a state in which the slider 1 is moving in the outer circumferential direction on the surface of the magnetic disk 7 while flying, and ( (b) shows the state in which the slider 1 has reached the outer periphery of the magnetic disk 7, and the slider is in a floating state.(C) shows the state in which the slider 1 has moved beyond the outer periphery of the magnetic disk 7 in the radial direction. The slider 1, which has lost negative pressure, separates from the extended surface of the disk surface due to the reaction force of the flexure 2.

is in a state of The sloped surface 1811''j on the outer periphery of the disk has the effect of smoothing the detachment of the slider, and the vibration prevention member 4 prevents vibrations at the time of detachment, thereby preventing the slider from hitting the disk surface.

Note that driving the arm 5 when the power is OFF can be achieved, for example, by supplying electromotive force due to inertial rotation of the spindle motor 13 to the voice coil motor 12.

As described above, the magnetic disk device of the one-pointed embodiment of the present invention includes a slider that scans the magnetic 1C disk by the operation of the arm while floating the magnetic disk, and the slider is connected to the arm via a flexible member. The operation of the arm is such that when the disk mounting is in a stopped state, the slider is positioned outside the radial area of the magnetic disk, and when the magnetic disk device performs a stopping operation, the slider is positioned outside the radial area of the magnetic disk. moving from within a radial area of the magnetic disk surface to outside the area while floating and scanning the magnetic disk surface;
When the slider moves out of the radial area of the magnetic disk surface, it loses negative pressure and automatically moves away from the extended surface of the magnetic disk surface, and slides onto the flexible surface of the flexible member. By configuring the magnetic disk device to have a vibration prevention member attached, the slider will not contact or vibrate the magnetic disk and cause damage or corrosion during the stop operation or stop of the magnetic disk device. effective.

Although a negative pressure slider was used in the embodiment, when a positive pressure slider is used, when the slider moves out of the radial area of the magnetic disk, the slider slopes gently as shown by the dotted line in FIG. By moving it to the stand 19, it can be separated from the magnetic disk surface.

Effects of the Invention As is clear from the above embodiments, the magnetic disk drive of the present invention includes a slider that scans by the operation of an arm while floating on a magnetic disk surface, and the slider is moved through a flexible member (flexure). It is fixed to an arm, and the movement of the arm is such that when the disk drive is in a stopped state, the magnetic head is positioned outside the radial area of the magnetic disk, and when the magnetic disk drive is in a stopped state, The slider is moved from inside the area of the magnetic disk surface to outside the area while floating and scanning the magnetic disk surface, and when the slider moves out of the area of the magnetic disk, it moves in a direction away from the magnetic disk surface, By using a magnetic disk drive in which a vibration prevention member is attached to the flexible cylinder of the flexible member, the slider is pulled out or vibrates against the magnetic disk during the stop operation or stop of the magnetic disk drive, thereby preventing impact from IJ, etc. It has the effect of not causing corrosion or corrosion.

[Brief explanation of drawings]

FIG. 1 is a top view showing the configuration of a magnetic disk device according to an embodiment of the present invention, and FIG. 2 a, b, and c are disks of the present invention.
...Magnetic disk surface, 18...Radial region of the magnetic disk.

Claims (3)

[Claims] (1) A slider is provided which scans by the movement of an arm while floating on a magnetic disk surface, the slider is fixed to the arm via a flexible member, and the movement of the arm is limited when the disk device is in a stopped state. A magnetic disk device in which the slider is located outside a radial region of the magnetic disk. (2) When the magnetic disk drive performs a stop operation, the operation of the arm that causes the slider to scan the magnetic disk surface shall move the slider out of the radial area of the magnetic disk, and the slider will fly while scanning the disk surface. The magnetic disk according to claim 1, wherein the arm moves from within the area of the magnetic disk surface to outside the area and moves in a direction away from the magnetic disk surface when the arm moves out of the area of the magnetic disk. Device. (3) The magnetic disk device according to claim (1) or (2), wherein a vibration prevention member is attached on the flexible surface of the flexible member (flexure).