JPH0215476A - Hard disk device - Google Patents

Abstract

PURPOSE:To prevent the contact of a magnetic head and a magnetic disk surface by abutting the protruding part of a flexure on a pressing member by moving the flexure, and separating a slider to hold the magnetic head from the magnetic disk surface. CONSTITUTION:A slider 3 is fitted on a gimbals fixed to a flexure 1 and shared with the first core of the magnetic head. The second core 3' of the magnetic head is formed in one body with the slider 3 at the rear of the slider 3. For a plate spring protrusion 2, its one tip edge is arranged so as to be opposite to a disk surface, and the other bottom surface is welded into the flexure 1. The flexure 1 is fixed to the tip of an arm 5. One edge of a pressing member 4 is fixed to an external part, and the plate spring 2 is provided in the immediate outside of the outer circumference of a magnetic disk 6 in a direction rectangular to the moving direction of the arm. When the title hard disk device stops, the protrusion 2 is abutted on the pressing member 4 by moving the flexure 1, and the slider can be separated from the surface of the magnetic disk 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hard disk device for storing data.

Conventional technology Conventional hard disk drives use a contact start/stop system in which the slider contacts the disk surface and rotates the disk surface at startup, and the slider and disk surface come into contact and stop while making contact when stopping. Most of them were institutionalized.

Problems to be Solved by the Invention However, in this type of system, the rotational speed of the disk decreases at startup, until the disk reaches a certain rotational speed and the slider floats away from the disk surface due to the air flow above the disk surface, and also just before stopping. Since the slider comes into contact with the disk surface and rubs against the disk from the time the slider descends onto the disk until the disk comes to a complete stop, there is a high possibility that slight scratches will occur on the slider or disk surface. Furthermore, there is a problem in that the abrasion of the disk surface at that time causes dust to be generated. For this reason, the gap between the slider and the media has been controlled using an actuator, and the slider has been lifted up when starting or stopping, but the actuator requires high precision and the device is expensive.

Means for Solving the Problems In order to solve this problem, the present invention provides a flexure that swingably holds a slider with a protrusion, and a presser member that is fixed at a position where the protrusion comes into contact when the flexure is moved. is provided, and by moving the flexure, the protrusion is brought into contact with the pressing member, and the slider is separated from the surface of the magnetic disk.

Operation With the structure described above, when the flexure is moved to a position where the protrusion abuts on the presser member, the protrusion abuts the presser member and runs over the presser member, causing the flexure to bend. Then, the slider at the tip also moves in the direction of separating it from the disk surface.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, 1 is a flexure in the form of a leaf spring; 3 is a flexure in the form of a leaf spring;
is a slider mounted on a gimbal fixed to the flexure 1 and shared with the first core of the magnetic head. A second core 3' is formed integrally with the slider 3 at the rear part of the slider 3 made of a magnetic material, and a space between the first core and the second core 3' is used for writing information on the magnetic disk. A gap for reading is formed, and the second core 3' is provided with a coil.

Note that the slider 3 in this embodiment is a negative pressure type slider. This negative pressure type slider 3 has negative pressure that acts to attract the slider 3 toward the magnetic disk by airflow generated on the surface of the magnetic disk rotating at high speed.
A positive pressure that acts upward from the magnetic disk is generated at the same time, and the slider 3 comes to rest at a position where the generated positive pressure and negative pressure balance each other. Because of the strong holding force exerted by the airflow, the slider 3 can maintain a submicron gap from the magnetic disk surface and fly. Reference numeral 2 denotes a plate spring protrusion bent into a U-shape, and is arranged so that one tip side faces the disk surface, and the other bottom surface is welded to the flexure 1. 5
is a metal arm on which a slider 3 is mounted and traces the magnetic disk 6 while moving in the direction of arrow A. A flexure 1 is fixed to the tip of the arm 5 by a mount portion 7 with a screw. Reference numeral 4 denotes a holding member whose negative end is fixed to the outside, and when the arm 5 moves, the plate spring 2 is installed just outside the outer periphery of the magnetic disk 6 in a direction perpendicular to the direction of movement of the arm.

Next, a description will be given based on FIG. 2. However, a plurality of these flexures are attached to the tip of the arm 5 in such a way that the arms 5 are inserted with their backs facing each other, and the operation will be explained when a plurality of magnetic disks 6 corresponding to a plurality of heads are provided. do. First, starting from the head floating state, the operation in a bad road where the drive operation is stopped will be explained in the order of (A), (B), and (C) in FIG. 2.

(A) shows a magnetic disk 6 on which the slider 3 is rotating at high speed.
Due to the holding force of the airflow, it follows the disk surface while maintaining a certain distance.

At this time, the arm 5 is freely moved in the direction of the B-B' force by an external force, and the head moves accurately to the desired position on the magnetic disk, writing and recording information on the magnetic disk. information is read. Now, when the arm 5 is stopped, it moves in the direction B, and when the slider 3 comes close to the outermost periphery of the magnetic disk, the plate spring projection 2 comes into contact with and rides on the presser member 4 fixed outside. When the arm S further moves in the direction B, the plate spring protrusion 2 bends toward the slider 3 as shown in (b), and the flexure 1
1 in the opposite direction to the pressing member 4, and as a result, a force acts on the slider 3 in the direction of separating it from the magnetic disk surface. If this force is larger than the holding force caused by the airflow that tries to keep the distance between the slider 3 and the magnetic disk 6 constant, the slider 3 will be pulled away from the magnetic disk surface, and the plate spring projection 2 will move as shown in (c). Due to the restoring force, the flexures 1 are deflected in the direction opposite to the pressing member 4, and the slider 3 is moved away from the magnetic disk surface and becomes stationary. On the other hand, even when the force that tries to separate the slider 3 from the magnetic disk surface is smaller than the holding force acting between the slider 3 and the magnetic disk, the holding force is proportional to the rotational speed of the disk, so the rotation of the disk is slow. When the slider 3 starts to fall, the holding force between the slider 3 and the disk becomes weak (and at the moment that holding force becomes smaller than the force that tries to pull the slider 3 away from the disk, the slider 3 is pulled away from the disk surface and the same (ha) ).If the arm 5 is restrained in the state of (c) so that it does not move, the device will be in a stopped state.On the other hand, when starting up, the arm 5 is moved in the direction C. As time goes on, due to the restoring force of the slider 1, the part of the plate spring protrusion 2 that is in contact with the pressing member 4 gradually moves to the restoring force of the plate spring protrusion 2, and therefore the slider 3 is moved against the disk surface. When the slider 3 and the disk 6 approach to a distance where the holding force acting between them acts, the holding force will no longer allow them to approach any further, and the arm 5 will be moved further in the direction C. By doing so, the plate spring protrusion 2 is attached to the presser member 4.
2) and becomes ready for information reading and writing operations.

In this way, the slider 3 can move to the loading state and the unloading state without contacting the surface of the disk 6.

FIG. 3 shows the slider 3 near the innermost circumference of the magnetic disk 6.
This is an embodiment in which it is possible to load and unload.

Place the plate spring protrusion 2 at a position near the arm 5 of the flexure 1,
The plate spring protrusion 2 comes into contact with the holding member 4 by moving the arm 5 in the direction of E, and the rest is the same as the previous embodiment. Unloading is performed by the same operation, and conversely, loading operation is realized by moving the arm 5 in the direction D from this unloading state.

In the above embodiment, the plate spring protrusion 2 is provided on the flexure 1 by welding, but the present invention will still be effective even if a portion of the flexure 1 is bent to form a protrusion.

Effects of the Invention The present invention provides a projection on the flexure and a member that comes into contact with the projection when the flexure is moved, so that when the flexure is moved, the projection hits the member and moves the slider away from the disk surface. With a simple configuration, it is possible to provide a hard disk device in which the head and the disk surface do not come into contact with each other.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a hard disk device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing the operation of a hard disk device according to an embodiment of the present invention, and FIG. 3 is a schematic diagram showing the operation of a hard disk device according to an embodiment of the present invention. It is a schematic diagram showing an example of. 1... Flexure 2... Leaf spring protrusion 3.
...Slider 4...Press member Shigetaka Awano Name of agent Patent attorney Konshu Shichi J and one other person Fig.

Claims (1)

[Claims] a magnetic disk that stores data, a magnetic head that reads data from the magnetic disk, a slider that holds the magnetic head, a flexure that swingably holds the slider, and a protrusion provided on the flexure;
When the flexure is moved, the protrusion has a presser member fixed at a position where it abuts, and by moving the flexure, the protrusion is brought into contact with the presser member, and the slider is moved against the magnetic disk. A hard disk device characterized by being separated from the surface.