JPH0393087A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent the influence of external vibration and seek reaction and to improve head positioning precision by means of high speed access against a magnetic disk by flexibly supporting a device case in the translation direction of vibration and rigidly in the direction of rotation. CONSTITUTION:An intermediate frame 22 is provided between the device case 15 mounting a rotation device 11 to which the magnetic disk 12 is installed and a rotational type positioner 14 accessing the magnetic disk 13, and an external frame 21. Space between the case 15 and the frame 22 is supported by laying means which can flexibly slide the case in the direction of X and which rigidly restrict it in the direction of Y, a bearing 23, a spring 24 and a dumper 25, for example. Space between the intermediate frame 22 and the external frame 21 is supported by laying the bearing 23, the spring 24 and the dumper 25, all of which rigidly restrict the frame 22 in the direction of X and can flexibly slide. Thus, external vibration can sufficiently be attenuated and the rotation movement of the case 15 owing to the seak reaction of a positioner 14 can almost completely be restricted.

Description

[Detailed Description of the Invention] [Summary] A magnetic disk device that is lightweight relative to an external frame is related to a magnetic disk device that is widely used as an external storage device for computer systems, especially a vibration-proof support structure for the entire magnetic disk device. The structure supports the head flexibly in the translational direction and rigidly in the rotational direction to prevent the influence of external vibrations and seek reaction forces, thereby enabling accurate head positioning with high-speed access to the magnetic disk. This is a magnetic disk drive in which a device housing in which a magnetic disk rotation mechanism, a magnetic head, and a rotary positioner for head access are mounted is supported with respect to an external frame via vibration isolating means. The above-mentioned vibration isolating means includes an intermediate frame having a shape that surrounds the device casing and is arranged between the device casing and the external frame, and between the device casing and the intermediate frame and between the intermediate frame and the external frame. A vibration isolating rubber member is provided that allows the device housing and the intermediate frame to slide only in one direction orthogonal to each other and has a spring and damper function, so that the device housing is flexible in the translational direction of vibration and in the rotational direction. Take precautions to firmly support.

[Industrial application field]

The present invention relates to a magnetic disk device that is widely used as an external storage device for computer systems, and more particularly to a vibration-proof support structure for the entire magnetic disk device.

In recent years, magnetic disk drives have been rapidly becoming smaller and faster, and as position aligners for positioning magnetic heads for recording and reproducing on magnetic disks, the mass of the moving parts is small, the mechanism is simple, and it is advantageous for miniaturization. Rotary type (swing arm type) positioners are widely used.

This rotary positioner generally has a structure designed with good rotational balance, and is relatively unaffected by translational mechanical vibrations from outside the device. (abbreviated as DE) causes rotational movement, which tends to cause head positioning errors. Therefore, there is a need for a vibration-proof support structure for the DE that is not affected by such external vibrations and seek reaction forces.

[Conventional technology]

As shown in FIG. 3, a conventional general DE vibration-proof support structure includes a magnetic disk 12 mounted on a rotating mechanism II with respect to an external frame 16, a magnetic head l3, and a rotary positioner l4 for head access. A relatively flexible design in which the device casing 15 in which DE is mounted is supported through a vibration isolating rubber material 17, etc., which has a damper function for absorbing external vibrations and a spring function for attenuating external vibrations. A structure is taken.

[Problem to be solved by the invention]

By the way, in the vibration-proof support structure of the DB as described above, if the entire device is made smaller, the weight will inevitably be reduced and the moment of inertia will also be reduced. When the seek speed of the magnetic head 13 by the positioner 14 is increased, the seek reaction force of the rotary positioner 14 causes the entire device to rotate in the direction of arrow A as shown by the broken line, causing a head positioning error. There was a problem.

Such a phenomenon would not be a problem if the servo gain of the head positioning system was infinite, but in reality there is a finite value, so the movement of the entire device causes a head positioning error. Therefore, for example, if the device is firmly fixed directly to the external frame 16 without using the above-mentioned vibration-proof support structure, such a problem will not occur, but it will be vulnerable to external vibrations and is not practical. ．． In view of the above-mentioned conventional situation, the present invention provides a structure in which a lightweight magnetic disk device is supported flexibly in the translational direction of vibration and rigidly in the rotational direction with respect to an external frame to prevent external vibration and seek reaction. It is an object of the present invention to provide a novel magnetic disk device that prevents the influence of force and thereby improves head positioning accuracy by high-speed access to a magnetic disk.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has a magnetic disk structure in which a W-mounted casing in which a magnetic disk rotation mechanism, a magnetic head, and a rotary positioner for head access are mounted is supported with respect to an external frame via vibration isolating means. In the disk device, the vibration isolating means includes an intermediate frame having a shape surrounding the device casing and an external frame between the device casing and the external frame. A vibration isolating rubber member is provided between the frames so that the device casing and the intermediate frame can slide only in one direction perpendicular to each other and has a spring and damper function, so that the device casing is flexible in vibration and translational directions. It should be rigidly supported in the direction of rotation.

[For production]

In the present invention, as shown in the principle diagram of FIG. 1, a device housing 1 is provided with a rotating mechanism 11 mounted with a magnetic disk l2, a rotary positioner 14 for accessing a magnetic head l3, etc.
5 and the external frame 21, and between the device housing 15 and the intermediate frame 22, means for, for example, allowing the device housing 15 to slide flexibly in the X direction and rigidly restrain it in the Y direction. The intermediate frame 22 is supported by, for example, a bearing 23, a spring 24, and a damper 25.
Also between the external frame 21, the intermediate frame 22 is rigidly restrained in the X direction and supported by a bearing 23, a spring 24, and a damper 25 that can be flexibly slid in the Y direction.

In this way, the device housing 15 is supported flexibly in the X and Y directions with respect to the external frame 21, and external vibrations are sufficiently damped. In addition, it is extremely rigidly supported in the direction of rotation, so
Device housing 15 due to seek reaction force of rotary positioner l4
It becomes possible to almost completely restrain the rotational movement of the

Note that since external vibrations (disturbances) generally have a smaller effect on the rotational direction than on the translational direction, such a support structure does not deteriorate the resistance to disturbances in the rotational direction. As a result, highly accurate head positioning can be achieved even during high-speed access.

〔Example〕

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

In the figure, reference numeral 15 denotes a device housing in which a DE is mounted, which is composed of a rotating mechanism 11 on which a magnetic disk 12 is mounted, a rotary positioner 14 for accessing a magnetic head 13, etc., and is located between the device housing 15 and an external frame 3l. As shown in the figure, an intermediate frame 32 having unevenness at the four corners is provided.

Further, between the device casing 15 and the four corners of the intermediate frame 32, there is a means for moving the device casing 15 flexibly in the X direction and rigidly restraining it in the Y direction, for example, a means that is flexible in the shear direction and in the compression direction. The device housing 15 is supported by interposing hard vibration-proof rubber 33a to 33d as shown in the figure.

Moreover, between the four corners of the intermediate frame 32 and the external frame 31, the intermediate frame 32 is rigidly restrained in the X direction,
Anti-vibration rubber 3 similar to the one described above so as to move flexibly in the Y direction
4a to 34d are interposed and supported as shown in the figure.

In such a support configuration, the device housing 15 in which the DB is mounted is flexibly supported in the X direction with respect to the intermediate frame 32 and in the Y direction with respect to the external frame 3l, so that the influence of external vibrations is avoided. can be sufficiently attenuated.

Furthermore, since it is extremely rigidly supported in the rotational direction, the rotational movement of the device housing 15 due to the seek reaction force of the rotary position converter 14 is almost completely restrained.

Therefore, it is possible to accurately perform hend positioning with high-speed access to the magnetic disk l2 without being affected by external vibrations.

In addition, the vibration-proof rubbers 33a to 33d, 34a to 34d
Since the rigidity in the compression direction is not infinite, the movement of the device housing 15 cannot be completely restrained. However, by reducing the thickness of the vibration isolating rubber to a certain extent, the ratio of the compression spring constant to the shear spring constant can be reduced. Since it can be made sufficiently large, it is possible to set the rigidity to a level that does not pose a practical problem.

Further, according to this support method, it is possible to suppress not only the rotational movement caused by the seek reaction force, but also the rotational movement caused by the unbalance of the spindle. Therefore, even if the spindle is highly unbalanced, the head positioning accuracy will not be reduced. [Effects of the Invention] As is clear from the above description, according to the anti-vibration support structure for a magnetic disk device according to the present invention, head positioning with respect to a magnetic disk in a device in which a lighter DB is mounted is prevented from being affected by external vibrations. It has the advantage of being able to be achieved with high accuracy even with high-speed access without being affected, and has excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is a plan view for explaining the principle of the anti-vibration support structure for a magnetic disk device according to the present invention, and FIG. 2 is a plan view showing an embodiment of the anti-vibration support structure for a magnetic disk device according to the present invention. , Figure 3 is a plan view for explaining the vibration-proof support structure of a conventional magnetic disk drive. 1 and 2, 11 is a rotating mechanism, 12 is a magnetic disk, 13 is a magnetic head, 14 is a rotary positioner, 15 is a device housing, 21.
31 is an external frame, 22 and 32 are intermediate frames, 23
is a bearing, 24 is a spring, 25 is a damper, 33a ~
33d, 34a to 34d indicate vibration-proof rubber, respectively. Figure 1 Figure 2

Claims (1)

[Claims] (1) Magnetic disk rotation mechanism (11), magnetic head (1)
3) and a device housing (15) in which a head access rotary positioner (14) is mounted is supported with respect to an external frame (21) via vibration isolating means, the magnetic disk device comprising: The means includes a device housing (15) and an external frame (2).
1) An intermediate frame (22) having a shape that surrounds the device housing (15) is provided between the device housing (15) and the intermediate frame (22), and between the intermediate frame (22) and the external frame ( 21) A member is provided between the device housing (15) and the intermediate frame (22) that can slide only in one direction perpendicular to each other and has the functions of a spring (24) and a damper (25). ) is supported flexibly in the translational direction of vibration and rigidly in the rotational direction.