JPH021746Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention relates to a magnetic disk device, and in particular, to a magnetic disk device in which there is no problem in opening and closing the cover and the head carriage can be substantially supported with a double-sided structure. This invention relates to a head carriage support structure.

<Prior art and problems> In general, a magnetic disk device has two drives as a drive system.
It is divided into two parts, one part for rotating the magnetic disk, and the other part for driving the head carriage on which the magnetic head is mounted.

These drives are fixed to a relatively thick base frame, and a cover is attached to cover the magnetic disk and head carriage parts.

An example of a typical conventional magnetic disk device is shown in FIG.

In the figure, 1 is a base frame, 2 is a disk rotation support frame, 3 is a magnetic disk, 4 is a rotation axis, and 5
is the disk rotation motor, 6 is the head arm, and 7 is the disk rotation motor.
numeral 8 indicates a disk carriage support frame, numeral 8 indicates a disk carriage, numeral 9 indicates a head drive motor, and numeral 10 indicates a cover.

A base frame 1 supports the rotation of the magnetic disk 3 and the swinging of the head carriage 8.

These supports are rotatably supported by a disk rotation support frame 2 and a disk carriage support frame 7, which extend from the base frame 1, through bearings around their respective rotation axes.

As shown in the figure, the magnetic disk rotation shaft 4 extends from a shaft extending from the disk rotation motor 5.
Each magnetic disk 3 is rotatably supported.

Further, as shown in the figure, the head carriage 8 supports a rotating shaft extended by a head drive motor 9 at the upper and lower sides of the disk carriage support frame 7.

The disk rotation motor 5 rotates in a fixed direction at a predetermined number of rotations, and the head carriage 8 has a magnetic head that faces each track of the magnetic disk 3 and is movable over the entire circumference of the magnetic disk 3. The head drive motor 9 operates so as to perform the swinging motion only within a certain range of angles.

Further, the magnetic disk 3 and the magnetic head portion are covered with a cover 10 to prevent dust from entering.

However, a problem with a magnetic disk device having such a structure is off-track due to mechanical vibration.

In particular, since the head carriage 8 undergoes repeated rocking motion, deceleration and acceleration are repeated extremely frequently, resulting in vibration of the rotating shaft.

To prevent this, the base frame 1 is made of a relatively thick member, but since it is supported only by the base frame 1, each rotating shaft is in a cantilevered state, which prevents vibrations. It was difficult to hold back.

There is also a magnetic disk device with a double-sided structure in which each rotating shaft is supported by a different base frame 1.
In this case, vibrations can be suppressed to a large extent, but when inspecting the inside of the magnetic disk for maintenance etc., it requires disassembly and assembly, which has the disadvantage of extremely poor maintainability.

<Purpose of the invention> The present invention is a magnetic disk device that can reduce vibration by providing a magnetic disk device with a cover type magnetic disk device that does not reduce maintainability and has a substantially double-sided structure. The purpose of this invention is to provide a head carriage support structure in a device.

<Configuration of the Invention> In order to achieve the above object, the present invention provides a magnetic disk device comprising a base frame supporting a magnetic disk and a head carriage, and a cover provided to cover the magnetic disk and the head carriage. This is achieved by providing a head carriage support structure for a magnetic disk device, characterized in that one end is supported by the base frame and the other end is supported by the cover via a spacer.

<Embodiment of the invention> FIG. 2 shows an embodiment of the head carriage support structure of the invention.

In the figure, the same symbols as in FIG. 1 indicate the same things, and in the figure, 11 indicates a spacer. In the embodiment, the base frame 1 is made of aluminum and has a thickness of 50 to 60 mm, and the cover is also made of aluminum and has a thickness of about 10 mm.

In the present invention, a spacer 1 is provided between the head carriage (head carriage support frame 7) and the cover 10.
1 was inserted. This spacer is configured with mechanical precision so that the cover 10 is in complete contact with the base frame 1 while being fixed thereto. Although the cover is not shown, it is fixed with screws or the like so that the inside can be sealed, and the spacer 11 is adhesively fixed to the carriage support frame 7 on the head carriage side.

Therefore, there is no obstacle when opening the cover 10.

This spacer 11 is made of aluminum, hard rubber, or the like.

In this way, when the spacer 11 is inserted, the upper part of the head carriage is also substantially supported, and vibration can be reduced.

As described above, in the embodiment, the head carriage is supported from above and below, and vibrations due to movement of the carriage can be prevented.

In this embodiment, the head carriage is of a rotary type, but a linear motor type head carriage may also be used.

<Effects of the invention> As described above, with this invention, the head carriage can be essentially supported on both sides without being fixed to the cover in any way, which greatly reduces vibrations caused by the movement of the head carriage. I can do it.

[Brief explanation of the drawing]

FIG. 1 shows an example of the configuration of a conventional magnetic disk device, and FIG. 2 shows an embodiment of a head carriage support structure in the magnetic disk device of the present invention. In the figure, 1 is a base frame, 2 is a disk rotation support frame, 3 is a magnetic disk, 4 is a rotation axis,
5 is a disk rotation motor, 6 is a head arm,
7 is a disk carriage support frame, 8 is a disk carriage, 9 is a head drive motor, 10 is a cover, and 11 is a spacer.

Claims (1)

[Scope of utility model registration request] In a magnetic disk device comprising a base frame supporting a magnetic disk and a head carriage, and a cover provided to cover the magnetic disk and head carriage, one end of the head carriage is supported by the base frame, and the other end is supported by the base frame. A head carriage support structure in a magnetic disk device, characterized in that the head carriage is supported by the cover via a spacer.