JPH0590694U - Disk drive - Google Patents

Abstract

(57) [Summary] [Purpose] In a fixed magnetic disk device, a good air flow is generated when the disk rotates. [Structure] Hub 1 supporting a plurality of disks 4a, 4b
An air introducing port 27 is provided on the top surface of No. 4, and an air guiding protrusion 28 is provided on the edge of the air introducing port 27. Protrusions 33 are provided on the bottom surface of the container 1 to guide the air flow from the outside to the inside of the disc. This allows the disc 4
Air is satisfactorily introduced between a and 4b. Air flows from the inner side to the outer side between the disks 4a and 4b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixed magnetic disk drive, which is generally called a Winchester hard disk drive, or a disk drive similar thereto.

[0002]

[Prior Art]

 The fixed magnetic disk drive device is configured to rotate a hard disk fixed to a hub at a high speed to levitate a magnetic head and read / write data. By the way, the dust in the container not only deteriorates the magnetic conversion characteristics but also adversely affects the flying characteristics of the magnetic head. For this reason, the fixed magnetic disk drive has an enclosed dust proof container and, in addition, air cleaning as disclosed in U.S. Pat. Nos. 4,367,502 and 4,369,475. It has a filter for use. Further, in order to generate an air flow, a passage may be formed in the hub portion of the disk for allowing air to flow from one main surface side of the disk to the other main surface side.

[0003]

[Problems to be solved by the device]

 By the way, in the past, it was difficult to obtain a good air flow because holes were simply formed in the hub to generate air flow from one main surface of the disk to the other main surface. It was

Therefore, an object of the present invention is to provide a disk drive device that can obtain a good air flow.

[0005]

[Means for Solving the Problems]

 The present invention for achieving the above object will be described with reference to the reference numerals of the drawings showing an embodiment. A plurality of dustproof containers 1 and a plurality of central holes 21a and 21b arranged in the container 1 are provided. Recording magnetic medium disks 4a and 4b, a disk support having a portion penetrating the central holes 21a and 21b of the disks 4a and 4b, and to which the disks 4a and 4b are fixed, and rotating the disk support. And a plurality of magnetic heads 5 arranged so as to face one and the other main surfaces of the disks 4a and 4b, respectively, in the disk drive device. The surface is provided with a plurality of air inlets 27 for forming an air circulation passage extending between the plurality of disks 4a, 4b, and an air draft is provided at an edge of the plurality of air inlets 27. Projections 28 are provided respectively, and further, the disk support is provided with holes for forming an air circulation passage from the bottom side of the container 1 to the plurality of disks 4a, 4b. The present invention relates to a disk drive device in which a plurality of protrusions 33 are provided on the bottom surface of the container 1 for guiding the air flow from the outside to the inside of the disk on the bottom surface. The disk support is composed of, for example, the hub 14, the fixing plate 17, and the first and second rings 31 and 32 of the embodiment.

[0006]

[Action and effect]

 The projection 28 on the top surface of the disk support of the above invention functions as a collision portion of the air flow, and the air that collides there flows through the air introduction port 27 and between the disks 4a and 4b. The protrusions 33 on the bottom surface of the container 1 guide the air flow from the outside to the inside of the disc. As a result, a favorable air flow is generated between the disks 4a and 4b from the inside to the outside of the disks 4a and 4b.

[0007]

【Example】

 Next, a Winchester type fixed magnetic disk device according to an embodiment of the present invention shown in FIGS. 1 to 6 will be described. As is clear from FIG. 2 which is an enlarged view of FIG. 1, the dustproof container 1 of the fixed magnetic disk drive comprises a main body 2 made of aluminum die casting and a lid 3 made of metal plate, and two hard disks. It accommodates the magnetic disks 4a and 4b. As is apparent from FIG. 1, in the container 1, a magnetic head 5 facing the upper surface of the disk 4a, a magnetic head (not shown) facing the lower surface of the disk 4b, and a pair of magnetic heads facing the upper and lower surfaces of the disk 4b. A magnetic head (not shown) is housed. The magnetic head 5 is attached to the carriage 6 by an arm having a spring property and is positioned by the moving mechanism in the radial direction of the disks 4a and 4b. Float about 0.5 μm.

The head moving mechanism includes a stepping motor 8 arranged outside the container 1, a belt 10 for converting the rotational movement of the motor 8 into a linear movement of the carriage 6, and a carriage 6 for guiding the carriage 6 in the disk radial direction. And a guide shaft 11.

The disk rotation motor 12 is attached to the container 1 in an airtight manner, and a hub 14 is fixed to a shaft 13 extending from here to the inside of the container 1. The two disks 4a and 4b are fixed to the hub 14 and the filter assembly is attached. To attach the discs 4a, 4b and the filter to the hub 14, the lower disc 4b is placed on the collar-shaped portion 15 provided at the bottom of the hub 14, and the spacer / filter device 16 and the upper disc are placed on the lower disc 4b. By arranging the disc 4a and the ring-shaped fixing plate 17 in order, inserting the six screws 18 shown in FIG. 3 into the through holes 19 of the fixing plate 17, and then screwing the screws into the screw holes 20 of the hub 14. Has been achieved.

The hub 14 has an outer peripheral surface 23 that substantially coincides with the central holes 21a and 21b of the disks 4a and 4b and the central hole 22 of the spacer / filter device 16, and has a direction of an arrow 24 shown in FIGS. 2 and 3. It has six grooves 25 for obtaining the air flow of. The metal first ring 31 forming the spacer / filter device 16 is also provided with six notches 26 for obtaining the air flow from the inside to the outside. The fixed plate 17 is also provided with six air inlets 27, which are aligned with the grooves 25 of the hub 14. An air guide protrusion 28 is provided on the edge of the inlet 27 in order to improve the air introduction efficiency. In FIG. 3, since the disks 4a and 4b are rotated in the counterclockwise direction, the air collides with the protrusion 28 and is guided into the introduction port 27. On the other edge of the rectangular inlet 27, a tongue-shaped portion 29 that is inclined inward is provided in order to smooth the flow of air.

Reference numeral 30 denotes an air cleaning filter made of, for example, polypropylene non-woven fabric, and is arranged on the collar-shaped portion 31a of the first ring 31 as a spacer / filter holder as shown in FIGS. 4 and 5. ing. This filter 30 is arranged so as to surround the entire outer circumference of the first ring 31, and a second ring 32 made of metal is arranged thereon. The second ring 32 is fitted to the outer periphery of the first ring 31, and the filter 30 is fixed to the first and second 31, 32 with an adhesive (not shown). A spacer / filter device 16 comprising a filter 30 and first and second 31, 32 is arranged between the two disks 4a, 4b so as to function as a spacer, as shown in FIGS. ing. The spacer / filter device 16 is, of course, disposed inside the effective recording areas of the disks 4a and 4b. Therefore, by providing this, the recording area is not reduced and the device does not become large. Since the filter 30 is arranged so as to cross the passage of the circulating air shown by the arrow 24, it is possible to effectively remove dust and dirt in the air. FIG. 6 shows the main body 2 of the container 1 and the hub 14 attached thereto. The main body 2 is composed of a bottom portion 2a and a side wall 2b, and the bottom portion 2a is provided with a protrusion 33 for guiding air toward the center of the hub 14.

An air pressure adjusting hole 34 is provided in the center of the lid portion 3 in FIG. 2, and a filter 35 is attached to the back surface of the lid portion 3 so as to close the air pressure adjusting hole 34.

By driving the motor 12 of the magnetic disk drive device constructed as described above, the shaft 12, the hub 14, the spacer / filter device 16, the fixing plate 17, and the disks 4a and 4b are integrated. Rotate. When the disks 4a, 4b are rotated at high speed, air flows from the inside of the disks 4a, 4b toward the outside, and the air is compressed in the outer areas of the disks 4a, 4b to increase the pressure. On the other hand, the pressure in the area between the disks 4a and 4b decreases. As a result, air circulation shown by the arrow 24 in FIG. 2 occurs. This circulation is further enhanced by the air guiding effect of the protrusion 33 of the container body 2 and the air guiding effect of the protrusion 28 of the fixing plate 17, and is extremely favorable. The air first flows in the direction toward the center of the hub 14, then in the axial direction (vertical direction) of the hub 14, and then flows between the low pressure disks 4a, 4b. Since all of the circulating air passes through the filter 30, a high cleaning effect can be obtained.

Since the filter 30 is disposed integrally with the hub 14, the space for the filter is extremely small, and the size and weight of the disk drive device can be reduced. Further, since the filter 30 is arranged using the first ring 31 having a function as a spacer, this arrangement can be easily achieved with a simple configuration.

[0015]

[Modification]

 The present invention is not limited to the above-mentioned embodiment, and the following modifications are possible, for example. (A) The filter 30 may be fixed directly to the hub 14 so as to traverse the air passage in the hub 14. (B) The air passage provided in the hub 14 and the first ring 31 may be formed in a tunnel shape. (C) It is also applicable to the case where there are three or more disks. If there are three or more discs, the filter is integrated with the spacer between the discs. (D) The filter 30 may be arranged on the air inlet side of the hub 14. (E) The shape of the container 1 may be maintained as in the conventional case in which the filter is arranged on the outer periphery of the disk, and instead of providing the filter here, electronic circuit parts may be arranged.

[Brief description of drawings]

FIG. 1 is a plan view showing the inside of a magnetic disk device according to an embodiment of the present invention with a lid removed.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an exploded perspective view showing the disc of FIG. 1 and a central portion thereof.

FIG. 4 is a plan view showing a spacer / filter device.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a plan view showing a container body and a hub.

[Explanation of symbols]

 1 Container 4a, 4b Disk 5 Head 14 Hub 27 Air Inlet 28 Protrusion 33 Protrusion

Claims (1)

[Scope of utility model registration request] 1. A dustproof container (1), a plurality of recording magnetic medium disks (4a) (4b) arranged in the container (1) and having central holes (21a) (21b), Discs (4a) (4b) Central holes (21a) (21
the disk (4a) having a portion penetrating through b)
The disk support to which (4b) is fixed, the motor (12) for rotating the disk support, and the one and the other main surfaces of the disks (4a) and (4b) are opposed to each other. A plurality of magnetic heads (5) arranged in the disk drive device, the plurality of disks (4) being provided on the top surface of the disk support.
a) A plurality of air introduction ports (27) for forming an air circulation passage extending between the (a) and (4b) are provided, and protrusions for guiding air are provided at the edges of the plurality of air introduction ports (27). (28) are provided respectively, and for forming an air circulation passage from the bottom side of the container (1) to the plurality of disks (4a) and (4b) in the disk support. The container (1) is provided with holes, and the bottom surface of the container (1) is provided with a plurality of protrusions (33) for guiding the air flow from the outer side to the inner side of the disc on the bottom surface. Disk drive.