JPS5855583B2 - Jikiday squat couch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk device in an electronic computer system or the like.

Traditionally, magnetic disk drives have used either fixed or removable media.

In fixed media devices, a magnetic disk is permanently attached to its associated disk drive.

Therefore, when a device fails, information cannot be read until the failed device is repaired, resulting in a large time loss.

Further, it has the disadvantage that repairing when a media failure occurs requires a skilled maintenance person and takes a long time to repair.

On the other hand, there are two types of magnetic disk drives that use removable media: a disk pack type that is interchangeable, and a data module type that has a structure in which the medium, magnetic head, access trolley, etc. are integrated into an interchangeable structure. Several types of methods are commonly used.

In recent years, there has been a remarkable improvement in the performance of magnetic disk drives, and both track density and bit density have increased significantly.

As the track density increases, it is necessary to extremely reduce the positioning accuracy error to the target track, and as the bit density increases, the air gap between the magnetic head and the magnetic disk becomes smaller. It becomes necessary to implement a dust-proof design that ensures reliability against read errors, head crashes, etc.

In a system in which disk packs are replaced as units, head track position adjustment is unavoidable, and this is one of the dominant causes of positioning accuracy errors.

Further, it is necessary to accept a certain degree of track position error due to temperature fluctuations and the like.

As long as this positioning error exists, read margins will decrease for various combinations of heads and disks, which will become a barrier to higher density.

Further, it has the disadvantage that it is difficult to create a structure that is sealed against dust.

The system in which the data module is the unit of exchange has succeeded in improving the drawbacks of the system in which the disk pack is the unit of exchange, and increasing the recording density as an interchangeable medium.

However, when compared with disk packs, the structure includes a spindle, base plate, access trolley, etc., which means that the replacement units are large, and they overlap, making it impossible to increase the capacity.

Furthermore, the connection between the access trolley and the drive mechanism is complicated, making it difficult to realize a highly reliable, low-cost, and highly rigid mechanism.

The present invention has been made in order to eliminate the above-mentioned drawbacks inherent in the conventional technology, and therefore, an object of the present invention is to provide a system that includes a magnetic disk, a magnetic head, a support cart, a drive mechanism, and an electronic circuit section. An object of the present invention is to provide a novel magnetic disk device with high density, large capacity, and high reliability by making the entire base assembly part portable and having a structure that is easy to attach and detach from the magnetic disk device.

The above object of the present invention is to provide a plurality of magnetic disks arranged coaxially, a plurality of magnetic heads provided close to each of the magnetic disks, and a support cart that integrally supports the plurality of magnetic heads. It has a base assembly part integrally mounted including a drive mechanism for moving the support cart and an electronic circuit part, and the base assembly part has a structure that can be freely attached to and detached from the magnetic disk device, and is also portable. It is distantly related to a magnetic disk device formed in Ru.

Next, a preferred embodiment of the present invention will be explained in detail with reference to the drawings.

Referring to FIGS. 1a and 1b, there are shown a plan view and a side sectional view of an embodiment of a base assembly part which is a main part of a magnetic disk drive according to the present invention.

In the figure, a plurality of coaxially stacked magnetic disks 1 are supported by a base plate 11 by a spindle 2, and rotated by a pulley 3 by a belt drive (not shown) with a motor.

The magnetic head 4 reads and writes desired information on a predetermined track, and is provided corresponding to a plurality of disks 1, and the plurality of heads are integrally supported by a support cart 5.
It is configured to be movable on rails 6 fixed on the base plate 11.

As a drive mechanism for positioning the magnetic head 4 on the track of the disk 1, a voice coil motor 7 is used here.

This voice coil motor 7 drives the support cart 5 by electromagnetic coupling between a moving coil 8 attached to the support cart 5 and a magnetic circuit 9, and is the same as the conventional one.

It is clear that means other than a voice coil motor may be used as the drive mechanism.

A part 10 of an electronic circuit necessary for reading and writing information on the magnetic head 4 is also mounted on the base plate 11, and the electronic circuit is connected to the device through a connector 12.

Reference number 13 indicates a cover, and the cover 13 covers the magnetic disk 1, the support cart 5, and the voice coil 8, and further extends to the end face of the magnetic circuit 9 of the voice coil motor 7. The enclosed area is kept in a sealed structure.

The air flow when the magnetic disk 1 rotates is as shown by the arrow in the figure, and clean air from the device is sent into the sealed area through the filter 14, and it flows as the magnetic disk 1 rotates. , voice coil motor 7
It passes through the gap between the coil and the magnetic circuit 9 to equalize the temperature in the vicinity, and enters the voice coil motor 7.

Furthermore, it passes through the base plate 11 and is delivered through the filter 15 into the air flow system of the device.

the filter 14 installed at the air inlet and outlet;
Reference numeral 15 serves as a cover to prevent dust from entering the inside when the base assembly 30 is not attached to the device 50 (see FIG. 2a).

FIGS. 2a and 2b show a base assembly showing an embodiment of the present invention;
FIG. 3 is a perspective view of the device and cover.

In the figure, the base plate assembly 30 has a base plate 11 configured as described above attached to a cabinet 22 via a vibration insulating member 21, and casters 2 are attached to the cabinet 22.
3 is attached and has a structure that makes it easy to move.

The base assembly section 30 is moved by casters 23 to the position where the magnetic disk device 50 is to be mounted, and is moved by the slide rail 5 extending from the casing of the magnetic disk device 50.
Attached to 1.

Next, by pushing the base assembly part 30 into the device 50, the assembly part 30 is mechanically fixed and positioned, and the mechanical system, electrical system, and air circulation system are connected to ensure normal operation as a magnetic disk device. I do.

Of course, when the base assembly 30 is pushed into the device, it is also possible to automatically make the three types of connections by mechanical movement of links, levers, etc.

When the base assembly section 30 is not installed in the magnetic disk drive 50, by covering the assembly section 30 with a cover 24 as shown in FIG. 2, the assembly section 30 can be protected and easily handled.

Furthermore, in this embodiment, the electric motor that rotates the magnetic disk 1 is mounted on the device 50 side in consideration of the adverse effects of vibration, but it is possible to more easily connect the base assembly section 30 and the magnetic disk device 50 when attaching and detaching them. It is also possible to mount it on the base plate 11 for this purpose.

According to the above embodiment, components that are relatively reliable and do not require maintenance or replacement are included in the sealed structure of the air circulation path;
The structure is simplified by preventing easy access to each component, while electronic circuits are located outside the air flow system so that they can be easily replaced.

In addition, by having a structure that can be easily transported, if a failure occurs in the magnetic disk device and the failure is caused by a failure other than the base assembly, the base assembly can be removed and attached to another device to improve the lead margin. It is also possible to read and write information without reducing it.

As explained above, the present invention has a structure in which the entire base assembly is portable and can be easily attached to and detached from a magnetic disk device, and the magnetic disk, magnetic head, support cart, and drive mechanism are housed within the air circulation path. Therefore, according to the present invention, the recording medium part can be easily replaced, and the recording medium can be easily replaced, and the recording medium part can be easily replaced.
A highly reliable magnetic disk device can be realized.

[Brief explanation of drawings]

1a and 1b are a plan view, a side sectional view, and a side sectional view showing the inside of a base assembly section in an embodiment of a magnetic disk device according to the present invention;
FIGS. 2a and 2b are exploded perspective views showing an embodiment of the magnetic disk device according to the present invention. DESCRIPTION OF SYMBOLS 1...Magnetic disk, 4...Magnetic head, 5...Support cart, 7...Voice coil motor, 10...Electronic circuit , 11...
... Base plate, 23 ... Caster, 30
. . . Base assembly section, 50 . . . Magnetic disk device, 51 . . . Slide rail.

Claims (1)

[Claims] 1 A plurality of magnetic disks arranged coaxially, a plurality of magnetic heads provided close to each magnetic disk,
The base assembly includes a support cart that integrally supports a plurality of the magnetic heads, a drive mechanism for moving the support cart, and an electronic circuit section, and the base assembly section includes The magnetic disk device is configured to be detachable from the magnetic disk device and to be portable, and the magnetic disk, magnetic head, support cart, and drive mechanism of the base assembly are housed in an air circulation system to form a sealed structure. A magnetic disk device characterized by: