JPS62129991A - Disk driving device - Google Patents

Abstract

PURPOSE:To reduce the space required for a filter device and to reduce the size and weight of the device by constituting a passage for air circulation and a filter for purging integrally with a hub. CONSTITUTION:A lower disk 4b is mounted on the collar part 15 of the hub 14, and the filter device serving as a spacer, an upper disk 4a, and a fixed plate 17 are arranged thereupon successively and clamped threadably by a screw 18. Intakes 25 and 27 for air circulation are provided to the hub 14 and fixed plate 17, a filter 30 of nonwoven fabric is arranged at the outer periphery of the metallic ring 3 of the device 16, and a cut part 26 for air communication is provided. When the motor 12 of a driving device is driven, air flows from inside to outside disks 4a and 4b, and flows in the center-axis direction of the hub 14 and then between the disks 4a and 4b to circulate as shown by an arrow 24. Thus, all the air passes through the filter 30, so that high purging effect is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixed magnetic disk drive generally referred to as a Winchester type hard disk drive or a similar disk drive. The present invention relates to a disk drive device having a cleaning filter.

[Conventional technology]

A fixed magnetic disk drive drives a magnetic head YFC by rotating a hard disk fixed to a hub at high speed.
It is configured to read data/write V by floating it. Incidentally, dirt and dust in the container not only adversely affect the magnetic conversion characteristics, but also adversely affect the flying characteristics of the magnetic head.

For this reason, the fixed magnetic disk drive has a sealed dustproof container, and is further equipped with an air purifying container as disclosed in U.S. Pat. No. 4,367.502 and U.S. Pat. Has a filter.

[Problem that the invention seeks to solve]

However, in conventional fixed magnetic disk drives, a large filter is disposed in the air flow in the outer peripheral area of the disk caused by the rotation of the disk. Therefore, a relatively large space is required for the filter, which is a disadvantage in reducing the size of the device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a disk drive device that can be downsized and use space effectively despite having an air cleaning filter.

[Means for solving problems]

To solve the above problems and achieve the above objects, the present invention has a dustproof container, a hub disposed within the container, and a disk attached to the hub and surrounded by the container. In the drive device, the hub is provided with an air passage for causing air circulation when the disk rotates, and a filter device f for cleaning air flowing through this passage is attached to the hub. This relates to a drive device.

[Function] In the above disk drive device, when the disk is rotated, air flows from the inside of the disk to the outside of the disk and back to the hub.

In the present invention, since the filter device is attached to the hub, good air purification is achieved. Furthermore, since the filter device' is integrally attached to the hub disposed inside the effective recording area of the disk, it becomes unnecessary to provide a space for the filter on the outer periphery of the disk, and miniaturization becomes possible.

〔Example〕

I will talk about this. The fixed magnetic disk drive is equipped with a dustproof container. As is clear from FIG. 2, which is an enlarged cross-sectional view of FIG.
It consists of two hard magnetic disks (4a) (4
b) t-contains. Container (1) contains the first
As is clear from the figure, there is a magnetic head (5) facing the top surface of the disk (4a), a magnetic head (not shown) facing the bottom surface of the disk (4b), and a pair of magnetic heads (not shown) facing the top and bottom surfaces of the disk (4b). A magnetic head (not shown) is accommodated in the carriage (6).
It is attached to the disk by an arm having spring properties, and is positioned in the flat diameter direction of the disk (4a) (4b) by a moving mechanism, so that when the disk (4a) (4b) rotates at high speed, the zero point is placed on the disk (4a). It floats by about .4 to 0.5 μm.

The head moving mechanism includes a stenciling motor (8) placed outside the container (1), a belt a@ which converts the rotational movement of the motor (8) into a linear movement of the carriage (6), and the carriage (6). ) Consists of a guide shaft (1υ) that guides the disk in the radial direction.

The disk rotation motor (17J) is airtightly attached to the container (1), and the hub side is fixed to the shaft (131) extending from here into the inside of the container (1).The hub side has two disks (4a ) (4b) is fixed and a filter assembly according to the invention is installed.

To attach the disks (4a) (4b) and the filter device to the hub side, place the lower disk (4b)' on the flange (151) provided at the bottom of the hub I, and place the spacer on top of the flange (151). Double filter unit fuQ, upper disk (
4a), and the ring-shaped fixing plate (171ffi + shell), and insert the six screws (18) shown in Figure 3 into the fixing plate (In
This is accomplished by inserting it into the through hole 4 of the hub I and then screwing it into the screw hole 4 of the hub I.

Hub < 141 is the central hole of the disk (4a) (4b)
21a) (21b) and spacer/filter device (f
6 grooves (c) having an outer circumferential surface (c) that almost coincides with the central hole Q of fi, and for obtaining air flow in the direction of the arrow (to) W shown in FIGS. 2 and 3. has. The first metal ring υ constituting the spacer water filter device QQ
6) to obtain air flow from the inside to the outside.
Notches C2e are provided. The fixing plate (L force) is also provided with 6 air inlets □□□, which match the groove @ of the hub I. In addition, in order to increase the efficiency of wall air exclusive use, air is provided at the edge of the starch surface. The guide, Takeshi, is dazzled.

In FIG. 3, the discs (4a) (4b) are rotated counterclockwise, so that air impinges on the arrowhead and is guided into the inlet. The other green of the rectangular cross section is provided with an inwardly sloping tongue I2 for smooth air flow.

(7) is an air cleaning filter made of polypropylene non-woven fabric, for example, and as shown in FIGS. is placed above. This filter example is arranged so as to surround the entire outer circumference of the first ring 6υ,
A second ring ring 4 made of metal is placed on top of this.

Note that the second ring r3 is fitted onto the outer periphery of the first ring 3υ, and the filter example is fixed to the first and second rings Gυ63 with an adhesive (not shown). A spacer/filter device 1tue consisting of a filter ring and first and second rings is arranged to function as a spacer between two disks (4a) (4b) as shown in FIGS. 2 and 3. has been done. This spacer/filter device αQ is of course arranged inside the effective ball distribution area of the disks (4g) (4b). Therefore, by providing this, the distribution #* will not be reduced or the device will not become large. Since the filter ■ is placed across the circulating air passage indicated by the arrow -,
and dust can be effectively removed.

Figure 6 shows the main body (2) of the container (1) and the hub (141) attached thereto.
) and a side wall (2b), and the bottom (2a) is provided with a protrusion (toward) for guiding air toward the center of the hub (I).

A pressure adjustment hole (b) is provided in the center of the lid (3) in Fig. 2, and a filter (c) is inserted into the lid (3) so as to close the air pressure adjustment hole (b).
is pasted on the back of.

Mode 1 of the hunting disc drive device configured as described above
' (If you drive 1'J t', you will get yaft (I21,)
・Pu U, spacer and filter device, (161, fixing plate (
1'rI and the disks (4a) (4b) rotate together. When the disks (4a) (4b) are rotated at high speed, air flows from the inside of the disks (4a) (4b) to the outside, and the air is compressed and the pressure is high in the outer peripheral area of the disks (4a) (4b). Become.

On the other hand, the pressure in the area between the disks (4a) (4b) decreases. This causes air circulation as indicated by the arrow (241) in Figure 2. This circulation is caused by the air guiding effect by the protrusion [present] on the container body (2) and by the protrusion (2) of the fixing plate U force. This is further strengthened by the guiding effect of the air.The air first flows in the direction toward the center of the hub a4, and then K.
It flows in the axial direction (vertical direction) of the hub I and flows between the low pressure disks (4a) (4b). Since all of the circulating air passes through the filter Q, a high cleaning effect can be obtained.

As described above, in this embodiment, since the filter (1) is integrally arranged on the hub (14), the space for the filter becomes extremely small, and it becomes possible to downsize and increase the size of the disk drive device. Further, since the first ring 3υ having a function as a spacer is conveniently used to arrange the fins A/C, this arrangement can be easily achieved with a simple configuration.

[Modified example]

The present invention is not limited to the embodiments described above, and the following modifications are possible, for example.

(a) The filter may be directly fixed to the hub I across the air passage at the knob.

fb) The air passage provided at the end of the hub a and the first ring 6υ may be formed in the shape of a tunnel.

(C) Applicable to cases where there are three or more disks, and cases where there is only one disk. Note that when there are three or more disks, a filter is integrated into the spacer between each disk. If there is only one disk, an air guiding portion equivalent to the disk (4b) in FIG. 2 is provided integrally with the hub I or with the container (1).

(d) The filter example may be placed on the air inlet side of the hub I.

(e) The shape of the container (1) may be kept the same as in the conventional case in which a filter is arranged around the outer periphery of a disk, and instead of providing a filter here, an electronic circuit component or the like may be arranged.

〔Effect of the invention〕

As is clear from the above (according to the present invention), since the entire filter is disposed in the part that rotates together with the disk, a special space for the filter becomes unnecessary or extremely small, and miniaturization is achieved.

[Brief explanation of drawings]

1 is a plan view showing the inside of a hunting disc drive device according to an embodiment of the present invention with the lid removed; FIG. 2 is an enlarged sectional view taken along the line n-m in FIG. Fig. 4 is a plan view showing the spacer/filter device, Fig. 5 is a sectional view taken along the line ■-■ in Fig. 4, and Fig. 6 is an exploded perspective view showing the disk and its central portion. FIG. (1)... Container, (4a) (4b)... Disk,
(5)...Head, I...Hub, tte...Spacer/filter device, (C)...Groove, (C)...Notch, Figure...Filter, 6υ first Ring, (321
...Second ring.

Claims (2)

[Claims] (1) In a disk drive device having a dustproof container, a hub disposed within the container, and a disk attached to the hub and surrounded by the container, air circulation is caused when the disk rotates. A disk drive device, characterized in that the hub is provided with an air passage for cleaning the air, and a filter device is attached to the hub for cleaning air flowing through the passage. (2) The filter device includes a first ring disposed around the outer periphery of the hub, a filter (30) held by the first ring, and a second ring disposed on the filter (30). The disk drive device according to claim 1, wherein the filter assembly comprises a ring (32) of a ring (32).