JPH0125160B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] An information recording/reproducing disk device with an improved means for suppressing vibrations imparted to the head, which suppresses vibrations of the head support system caused by airflow and eliminates reading and writing errors. For the purpose of reading and writing, it has a floating head at the tip, and a rectifying plate is provided at a position a predetermined distance from the head support system for accessing the information recording/reproducing disk in the rotational direction of the information recording/reproducing disk. It was configured as follows.

[Industrial application field]

The present invention relates to an information recording/reproducing disk device with improved means for suppressing vibrations applied to the head.

The head in a conventional magnetic disk device is mounted on a slider that floats up to a minute gap from the disk surface, and the slider is attached to an access arm via a gimbal having a soft spring in the bending direction.

The gimbal in such a support system has a circumferential speed of several tens of m/sec around the disk, and is placed in a high-speed and highly turbulent airflow of more than 10 m/sec even at a certain distance from the disk. The gimbal could be excited by the airflow, causing harmful vibrations that could cause errors in the reading and writing of information by the head.
Such problems tend to appear more prominently in recent high-density disk devices.

[Conventional technology]

Conventionally, there have been means for suppressing the above-mentioned vibrations, and that means, as shown in FIG. 6, is to provide a spoiler b on the upstream side of arm a. According to this means, the airflow is blocked by the spoiler b, so that the speed of the airflow between the disks is considerably reduced. In FIG. 6, c is a gimbal, d is a slider to which the head is attached, e is a head drive motor, f is a disk, and g is a base and cover.

[Problem to be solved by the invention]

However, since the gimbal c is placed in the airflow behind the spoiler b, vortices are likely to occur, and turbulence actually increases. Therefore, although it can be said that there is a certain degree of vibration suppression effect as a whole, the effect was not necessarily sufficient.

The present invention was created in view of the drawbacks of the conventional devices described above, and provides an information recording/reproducing disk device that can suppress vibrations of the head support system caused by airflow and perform reading and writing without errors. Its purpose is to provide.

[Means to solve the problem]

FIG. 1 shows a basic configuration diagram of the present invention. The present invention has a floating head at the tip, and a rectifying plate 8 is provided at a position a predetermined distance in the rotational direction of the information recording/reproducing disk 2 from the head support system 9 for accessing the information recording/reproducing disk 2. This constitutes a recording/reproducing disk device.

[Effect]

The air flow flowing into the head support system 9 used for accessing the information recording/reproducing disk 2 from the upstream side in the rotational direction is maintained in a laminar state by the baffle plate 8, and its average flow velocity is reduced. As a result, the vibrations occurring in the head support system 9 are significantly reduced, which helps to prevent errors when reading from or writing to the information recording/reproducing disk 2.

〔Example〕

FIG. 2 shows an embodiment of the invention. Reference numeral 1 denotes a main body of an information recording/reproducing disk device (hereinafter, the magnetic disk device will be explained), and a magnetic disk (information recording disk) 2 is rotatably attached to the main body 1. An access mechanism 3 for accessing the magnetic disk 2 is also attached to the main body 1. The access mechanism 3 consists of a motor 4, an arm 5 attached to the output shaft of the motor 4, a gimbal 6, and a slider 7 to which a head is attached. The arm 5, gimbal 6, and slider 7 constitute a head support system 9. A current plate 8 is attached to the downstream side of the head support system 9. The number of rectifying plates 8 is equal to the number of magnetic disks, and they have a comb-shaped structure as shown in FIG.

In this way, by providing the baffle plate 8 on the downstream side of the head support system 9, as can be seen from FIG. In region A on the upstream side of the baffle plate 8, the flow is almost clean and the flow velocity is slow (see also Fig. 5. This figure shows the measurement results of the average flow velocity in the circumferential direction near the baffle plate). On the other hand, in region B on the downstream side of the baffle plate 8, it was found that the flow was quite turbulent and the flow velocity was also quite high (see FIG. 5).

In this way, the head support system 9 is placed at position P in FIG.
If you place the current plate 8 on the downstream side,
The average flow velocity at position P becomes slower and the flow becomes less turbulent. Generally, fluid force is proportional to the square of the flow velocity, so as the flow velocity becomes slower, the excitation force is significantly reduced, as described above. In other words, the vibration suppression effect can be improved, and reading and writing errors can be reduced. The effect becomes more effective at high recording densities, giving such devices utility. Note that the flow velocity here is the inter-disk flow velocity, and since it hardly affects the flow in the immediate vicinity of the disk on which the slider is being floated, the slider floating characteristics are not significantly different from normal ones.

〔Effect of the invention〕

As described above, according to the present invention, (1) vibrations caused by airflow in the head support system are highly suppressed, and (2) reading and writing errors are thereby reduced, making it easy to realize high-density recording devices. Effects such as making it more effective can be obtained.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the basic configuration of the present invention, Fig. 2 is a diagram showing an embodiment of the present invention, Fig. 3 is a perspective view of a rectifying plate used in the device of the present invention, and Fig. 4 is an air flow between disks. FIG. 5 is a diagram showing the average flow velocity in the circumferential direction near the rectifier plate, and FIG. 6 is a diagram showing a conventional device. In FIGS. 1 to 5, 2 is a magnetic disk, 8 is a current plate, and 9 is a head support system.

Claims (1)

[Claims] 1. It has a floating head at its tip, and is characterized in that a rectifying plate 8 is provided at a position a predetermined distance from the head support system 9 that accesses the information recording/reproducing disk 2 in the rotational direction of the information recording/reproducing disk 2. Information recording/reproducing disk device.