JPH031391A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To make moment around the center of gravity for a disk enclosure (DE) closed to 0, to suppress instable action to vibration in all directions and to eliminate an error when information are read and written by supporting the DE by two arms at least or a buffer material held by the arm. CONSTITUTION:For inner rubber 3-a and 3-b out of the four kinds of vibration- proofing rubber 3-a - 3-d, when the vibration, etc., is received in X and Y directions, the spring constant of the vibration-proofing rubber is changed so as to suppress the instable action. Accordingly, the size of displacement quantity is adjusted and the displacement quantity is set at the almost same degree for the four kinds of the vibration proofing rubber 3-a - 3-d. Arms 7 protruded from a frame 2 support a DE 1 through a buffer material 8 so as to sandwich upper and bottom surfaces. Accordingly, even when the vibration, etc., is received in a Z direction, vibration energy can be absorbed by sandwiching the position of the largest displacement quantity or a part near the position by using the arms 7. Thus, when the information are read and written, the error is prevented from being induced by the instable action.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a magnetic disk device, and particularly to a vibration isolation structure for a magnetic disk device.

[Conventional technology]

Conventionally, as shown in FIG. 3, this type of magnetic disk device includes a disk enclosure (hereinafter referred to as DE) 1, which has a rotating recording medium, a head for reading and writing information, and a carriage for positioning the head. Frame 2 for attaching DEL to the system and anti-vibration rubber 3
-a to 3-d, and are connected by screws 4. Further, an electric circuit package 6 is attached to the DEL, and a front panel 5 is attached to the frame 2. Further, the vibration-proof rubbers 3-a to 3-d are used for the purpose of attenuating signals, impacts, etc. applied to the frame 2 and transmitting the same to the DEI.

However, the center of gravity of a magnetic disk device is not at the center of the device, but rather at B, relative to the center A of the device, as shown in Figure 1 when fishing on a boat.
The center of gravity is at a shifted position like the mark position, so 4
When the load is not applied evenly to the two vibration isolating rubbers 3 and the frame 2 receives vibrations from each of the X, Y, and Z directions shown in FIG. 3, the position close to the center of gravity as shown in FIG. The amount of displacement of the vibration isolating rubbers 3a and 3b increases, causing unstable behavior of the DEI. Therefore, the anti-vibration rubber 3-a and the anti-vibration rubber 3-
A method has been adopted in which the amount of displacement is adjusted by changing the spring constant of b, so that the amount of displacement of the four vibration isolating rubbers is the same, and unstable behavior in the X and Y directions is suppressed. But X,
It was extremely difficult to suppress the unstable behavior in the Z direction as shown in FIG. 5 while changing the spring constant of the vibration isolating rubber 3 so as to suppress the unstable behavior in the Y direction.

[Problem to be solved by the invention]

In the conventional magnetic disk drive described above, the center of gravity is not in the center of the device, so when the frame is subjected to vibration etc.
causes unstable behavior. Further, even if vibration isolating rubbers having different spring constants are used, it is difficult to make the sum of the moments around the center of gravity O. In other words, in the case of the magnetic disk device shown in FIG.
Although it is possible to suppress the unstable behavior in the Y direction by changing the spring constants of the four vibration isolating rubbers, it is difficult to suppress the unstable behavior in the Z direction. The disadvantage was that it was easy to cause errors when reading and writing.

[Means to solve the problem]

A magnetic disk device of the present invention includes a substantially rectangular parallelepiped-shaped disk enclosure mounting a spindle on which a magnetic disk is mounted and a carriage on which a magnetic head is mounted, a plurality of anti-vibration rubbers fixed to a side wall of the disk enclosure; A magnetic disk drive having a frame for holding the vibration isolating rubber, the shock absorber being held by or by at least two arms protruding from the frame so as to sandwich the thickness direction of the disk enclosure from the frame. The disc enclosure is also characterized by its material.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a top view of an embodiment of the present invention.

FIG. 2 is an AA sectional view of this embodiment.

In this magnetic disk device, as shown in FIG. 1, vibration-proof rubber 3-a to B-d held on a frame 2 for attaching the DEL to the system are connected to the side wall of the DEL via screws 4. .

Of these four vibration-proof rubbers 3-a to 3-b, 3-a and 3-b
The four anti-vibration rubber 3- a~
The amount of displacement of 3-d is kept at the same level. Further, as is clear from FIG. 2, the arm 7 protruding from the frame 2 has a cushioning material 8.
The upper and lower surfaces of the DEI are sandwiched between the DEI and the DEI. In other words, it is possible to absorb vibration energy by using the arms 7 to sandwich the position at or near the position where the amount of displacement is the largest when vibration etc. are received in the Z direction.

〔Effect of the invention〕

As explained above, the present invention has a plurality of vibration isolating rubbers fixed to the side walls of DE and DB and a frame for holding the vibration isolating rubber, and protrudes from the frame so as to sandwich the DE in the thickness direction from the frame. By supporting the DE with at least two arms, or with cushioning material held by the arms, the moment around the DE's center of gravity can be brought close to O, and the unstable behavior in response to vibrations in all directions can be suppressed. This has the effect of eliminating errors when reading and writing.

[Brief explanation of drawings]

FIGS. 1 and 2 are a plan view and an AA sectional view of a magnetic disk device according to an embodiment of the present invention, respectively, and FIGS.
The figures are an exploded perspective view of a conventional magnetic disk device,
, a plan view showing the behavior when subjected to vibration in the Y direction, and a Z
FIG. 3 is a cross-sectional view showing behavior when vibration is applied in a direction. 1... Disk enclosure 2... Frame, 3... Anti-vibration rubber, 4... Screw, 5... Front panel, 6... Electric circuit package, 7... Arm, 8
...Buffer material. Part 4, Part 5

Claims (1)

[Claims] A nearly rectangular parallelepiped disk enclosure mounting a spindle carrying a magnetic disk and a carriage carrying a magnetic head, a plurality of anti-vibration rubbers fixed to a side wall of the disk enclosure, and a frame holding the anti-vibration rubber. In the magnetic disk drive having the above, the disk enclosure is also supported by at least two arms protruding from the frame so as to sandwich the disk enclosure from the frame in a thickness direction, or by a cushioning material held by the arms. A magnetic disk device characterized by: