JPH06162703A - Magnetic disk device - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a magnetic disk device, and prevents the magnetic disk and the magnetic head slider from being damaged by a head crash by eliminating the attraction of the magnetic head slider onto the magnetic disk when the rotation is stopped. The purpose is to [Structure] When the rotation of the magnetic disk 11 is stopped, a head arm 13 supporting a magnetic head slider 12 is attached to the magnetic disk.
A slider support 16 that supports a head flying control slider 15 that flies by sliding on the disk surface in the outer peripheral area 11a above
The magnetic head slider 12 is mounted on the protrusion 16b provided on the
The head flying control slider by rotating the magnetic disk 11.
As the projection 16b on the slider support 16 tilts backward due to the floating of the head 15, the head arm 13 supporting the magnetic head slider 12 descends to move the magnetic head slider 12 to the data area 11b on the magnetic disk 11. It is configured to surface.

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 structure for preventing a magnetic head slider for recording / reproducing from crashing.

In recent magnetic disk devices, the magnetic head slider is in contact with the magnetic disk when the rotation is stopped, and the action of the air current generated as the magnetic disk starts to rotate and its rotation speed increases. As a result, a CSS (Contact Start Stop) method is widely used in which the magnetic head slider is floated on a magnetic disk at a minute interval for access.

In the magnetic disk drive using such a system, the magnetic head slider, which is in contact with the magnetic disk when the rotation of the magnetic disk is stopped, is easily attracted to the surface of the magnetic disk. There is a tendency that the magnetic head slider becomes hard to be separated and a head crash occurs. Therefore, there is a need for a device structure that allows the magnetic head slider to smoothly fly over the magnetic disk without causing such a head crash.

[0004]

2. Description of the Related Art In a conventional general magnetic disk device,
In a floating magnetic head slider for recording / reproducing on / from a magnetic disk, an air flow generated by an increase in the rotation speed of the magnetic disk flows between the magnetic disk and the magnetic head slider, and floats due to the viscosity of the air flow. In addition, the magnetic head slider is pressed by a load spring or the like in accordance with the levitation force due to the air flow to control the levitation amount at a minute interval for access.

Further, such a floating type magnetic head slider is kept in contact with the surface of the magnetic disk when the rotation is stopped, the magnetic disk is rotated, and the magnetic head slider is levitated as the rotation speed increases. Let CSS (Conta
The ct start stop) method is generally widely used.

[0006]

In the conventional magnetic disk device using the CSS (Contact Start Stop) method as described above, the magnetic head slider is attracted to the magnetic disk surface when the rotation of the magnetic disk is stopped. When the magnetic disks are attracted to each other, they are attracted to each other at the time of starting the rotation of the magnetic disk to cause a head crash, which causes a fatal problem that the magnetic head slider or the magnetic disk is damaged.

In order to solve such a problem, a method for preventing the magnetic head slider from being attracted by providing a lubrication protective film or the like on the surface of the magnetic disk has been adopted, but sufficient attraction prevention cannot be obtained yet. It is a big issue to be solved.

In view of the above-mentioned conventional problems, the present invention eliminates the attraction of the magnetic head slider on the magnetic disk when the rotation of the magnetic disk is stopped to prevent damage to the magnetic disk and the magnetic head slider due to head crash. It is an object of the present invention to provide a new magnetic disk device.

[0009]

In order to achieve the above object, the present invention floats a magnetic head slider supported by a head arm on a magnetic disk mounted on a rotating mechanism, and the magnetic head slider is used as a head. In a magnetic disk device that accesses a predetermined position of a magnetic disk by a positioning mechanism, a slider support body that supports a head flying control slider that slides and flies on the disk surface in the outer peripheral area of the magnetic disk is vertically rocked. Movably provided, the head arm is placed on a protrusion provided on the slider support, and as the head flying control slider flies over a rotating magnetic disk, the protrusion on the slider support is The head arm supporting the magnetic head slider descends in a state in which the magnetic head slider is tilted rearward, and Configured to levitate the data area on the disk.

Further, the outer peripheral area on the magnetic disk is formed as a step surface lower than the data area, and the outer peripheral step area is used as a runway dedicated to the head flying control slider.

[0011]

According to the present invention, when the rotation of the magnetic disk is stopped, the head arm that supports the magnetic head slider supports the head flying control slider that slides and flies over the disk surface in the outer peripheral area of the magnetic disk. Since the magnetic head slider is mounted on a protrusion provided on a slider support that can be vertically swung, and the magnetic head slider is held in a state of being separated from the magnetic disk surface, there is no possibility that it will be attracted to the magnetic disk. Disappear.

Further, as the head flying control slider flies in the outer peripheral area on the magnetic disk due to the rotation of the magnetic disk, the protruding portion on the slider support is tilted rearward, and the magnetic head The head arm supporting the slider descends and the magnetic head slider can be smoothly levitated on the data area on the magnetic disk. As a result, it is possible to prevent a head crash due to adsorption, and it is possible to maintain the flying stability of the magnetic head slider.

Further, the outer peripheral area on the magnetic disk is formed as a surface having a step lower than that of the data area, and the outer peripheral step area is used as a dedicated runway for the head flying control slider, so that the head flying control slider is vertically moved. Since the operating range in the direction is increased and the distance between the magnetic head slider and the magnetic disk surface can be increased when the rotation of the magnetic disk is stopped, the magnetic head to the magnetic disk surface can be increased even if the device slightly vibrates. The contact of the slider can be prevented.

[0014]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic plan view showing an embodiment of a magnetic disk device according to the present invention.

In the figure, 11 is a magnetic disk mounted on a rotating mechanism (not shown), which slides in the vicinity of the outer circumference of the magnetic disk 11 using an outer peripheral area 11a on the magnetic disk 11 as a dedicated runway, and As shown more concretely in FIG. 2, a flexible slider support 16 holding a flying head flying control slider 15 at its tip is fixed to a fixed shaft via a support shaft 17 inserted in an insertion portion 16a at the rear end. It is installed so that it can swing vertically with respect to 19.

The slider support 16 is a support shaft.
The head flying control slider 15 is brought into contact with the outer peripheral region 11a of the surface of the magnetic disk 11 when the rotation is stopped by the spring 18 attached to 17 and the rotation is stopped.

Further, a portion of the slider support 16 on the rear end thereof corresponding to the insertion portion 16a of the support shaft 17 is directed toward the magnetic disk side in a direction intersecting the longitudinal direction of the slider support 16. A long, generally semi-cylindrical protrusion 16b is provided, a head positioning mechanism (head actuator) 14 is connected to the protrusion 16b, and a head arm 13 holding a magnetic head slider 12 for recording and reproducing is provided at the tip. (a)
The magnetic head slider 12 is held in a state of being separated from the surface of the magnetic disk 11 when the rotation is stopped by a predetermined distance.

When the magnetic disk 11 is rotated at the time of recording or reproducing information on the magnetic disk 11, the head flying control slider 15 floats due to the viscosity of the air flow generated thereby, and the slider support 16 is moved. The protrusion 18 on the slider support 16 on which the head arm 13 holding the recording / reproducing magnetic head slider 12 is bridged as shown in FIG. 4 (b)
16b is tilted rearward to allow the head arm 13 to
The magnetic head slider 12 is lowered to the surface of the magnetic disk 11 in a non-supported state, and can be smoothly floated above the data area 11b with a predetermined flying height.

Further, when the recording or the reproduction of the information on the magnetic disk 11 is completed and the rotation of the magnetic disk 11 is stopped, the magnetic head slider 12 levitated in the data area 11b is stopped before the stop. By stopping the rotation of the magnetic disk 11 by moving the held head arm 13 onto the projecting portion 16b of the slider support 16 that supports the head flying control slider 15 that is also flying in the outer peripheral area 11a, As shown in FIG. 4 (a), the head arm
The magnetic head slider 13 is suspended over the protrusion 16b.
12 is held in a state of being separated from the surface of the magnetic disk 11 when the rotation is stopped by a predetermined distance.

Therefore, since the magnetic head slider 12 is always kept apart from the surface of the magnetic disk 11 when the rotation of the magnetic disk 11 is stopped,
It is not adsorbed on 11, and it is possible to eliminate the head crash caused by adsorption.

Further, as shown in FIGS. 5A and 5B, the outer peripheral area on the magnetic disk 11 is a surface having a step lower than the data area, and the outer peripheral step area 21 is a head flying control slider. By using the exclusive runway of 15, the vertical operating range of the head flying control slider 15 is increased, and the distance between the magnetic head slider 12 and the magnetic disk surface when the magnetic disk 11 stops rotating is also increased. Since the size of the magnetic head slider 12 becomes large, there is no risk of the magnetic head slider 12 coming into contact with the surface of the magnetic disk even if the device slightly vibrates, and the magnetic head slider 12 operates in the same manner as described with reference to FIGS. Can be realized. In this case, the surface roughness of the outer peripheral step region 21 is made rougher than the data region to prevent the head flying control slider 15 from being attracted.

Instead of the slider support 16 holding the head flying control slider 15 used in the above-described embodiments, the rear end of the slider support 31 is replaced by a support shaft 17 as shown in FIG. Of the slider support member 31 is extended rearward from the insertion portion 32, and the width of the slider support member 31 is widened toward the disc side from the front end portion to the rear end portion side, and recording / reproduction is performed on the extended rear end portion. Magnetic head slider 12 holding a head arm 13 for hanging a substantially semi-cylindrical protrusion 31a
Also by using the slider support 31 having the structure described above, the flying range of the head flying control slider 15 is widened, and even if the device slightly vibrates, the magnetic head when the magnetic disk 11 stops rotating. Since the separation distance of the slider 12 from the magnetic disk surface also becomes large, there is no risk of the magnetic head slider 12 making contact.

[0023]

As is apparent from the above description, according to the magnetic disk device of the present invention, the magnetic head slider for recording / reproducing is always on the magnetic disk regardless of whether the magnetic disk is rotating or not rotating. Since the magnetic disk is separated from the disk surface or floated, there is no possibility of being attracted to the magnetic disk, and it is possible to prevent head crush due to adsorption as in the past, and ensure the flying stability of the magnetic head slider. It has the advantages described above and has an excellent effect in practice.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a magnetic disk device of the present invention.

FIG. 2 is a perspective view for explaining a slider support body holding a head flying control slider in the magnetic disk device of the present invention.

FIG. 3 is a perspective view for explaining a modified example of a slider support body holding a head flying control slider in the magnetic disk device of the present invention.

FIG. 4 is a side view of essential parts for explaining the operation of the head flying control slider and the magnetic head slider in the magnetic disk device of the present invention.

FIG. 5 is a side view of essential parts for explaining another example of the operation of the head flying control slider and the magnetic head slider in the magnetic disk device of the present invention.

[Explanation of symbols]

 11 magnetic disk 11a outer peripheral area 11b data area 12 magnetic head slider 13 head arm 14 head positioning mechanism 15 head flying control slider 16, 31 slider support 16a, 32 insertion portion 16b, 31a protrusion 17 support shaft 18 spring 19 fixed Axis 21 Outer step area

Claims (2)

[Claims] 1. A magnetic disk (11) mounted on a rotating mechanism.
A magnetic disk in which a magnetic head slider (12) supported by a head arm (13) is levitated above and the magnetic head slider (12) is accessed to a predetermined position of the magnetic disk (11) by a head positioning mechanism (14). In the device, a slider support (16) supporting a head flying control slider (15) that slides and flies over the disk surface of the outer peripheral area (11a) of the magnetic disk (11) is vertically rocked. A magnetic disk that is rotatably mounted and has the head arm (13) mounted on a protrusion (16b) provided on the slider support (16).
As the head flying control slider (15) flies above the magnetic head slider (12), the protrusion (16b) on the slider support (16) is tilted rearward. A magnetic disk device characterized in that a head arm (13) supporting the magnetic disk is lowered to float the magnetic head slider (12) on a data area (11b) on the magnetic disk (11). 2. An outer peripheral area on the magnetic disk (11) is a step surface lower than a data area (11b), and the outer peripheral step area (21) is a dedicated runway for a head flying control slider (15). The magnetic disk device according to claim 1, wherein