JP2844701B2 - Disk drive - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device most suitable for application to, for example, a hard disk device, and particularly to a sealed container for recording and / or reproducing a disk-shaped recording medium. About what to do within.

[Summary of the Invention]

According to the present invention, both ends of a first support shaft on which a disk-shaped recording medium is mounted and a second support shaft on which a head arm is mounted are inserted and fixed into a base-side through-hole and a cover-side through-hole, respectively. Reference holes for positioning are formed on both end surfaces of the first and second spindles, and the disk-shaped recording medium and the head arm are rotatable with respect to a sealed container including a base and a cover. The first and second annular oil outflow prevention means which substantially surround the end surfaces of the first and second bearings provided to improve the mutual positional accuracy between the disk-shaped recording medium and the head arm are improved. The thickness of the base and the cover can be reduced, and the process of assembling the sealed container with the first and second spindles parallel to each other can be performed accurately and easily. It can, furthermore, are those which make it possible to prevent the oil from being scattered toward the first and second bearing disc-shaped recording medium and the head effectively.

[Conventional technology]

Conventionally, hard disk devices have been disclosed in, for example,
As disclosed in Japanese Patent No. 275082, a hard disk and a head arm for recording and / or reproducing the hard disk are housed in a sealed container.

In the conventional hard disk drive, as shown in FIG. 4, a gasket 3 is sandwiched between an outer peripheral portion of a base 1 and a cover 2 formed by aluminum die casting or the like. The four corners of the filter are fixed to each other from above and below by screws 4 to form a sealed container 5. Then, a disk motor 6 is mounted on the base 1 in the sealed container 5.
Is fixed by a plurality of screws 7, and the disk motor 6
One or a plurality of upper and lower hard disks 10 as a disk-shaped recording medium are horizontally fixed by a plurality of screws 11 to a disk hub 9 provided on the outer periphery of the upper end 8a of the motor shaft 8.
In the sealed container 5, an arm shaft 12 is fixed on the base 1 by a plurality of screws 14 via a bearing block 13, and a pair of upper and lower bearings 1 is mounted on the outer periphery of an upper end 12a of the arm shaft 12.
The head arm 16 is horizontally and swingably mounted via the head 5, and one or a plurality of floating types is mounted on one end of the head arm 16 via one or more elastic head supporting members 17 such as a plurality of upper and lower leaf springs. Install head 18. Further, a head motor 19 is mounted on the base 1 in the sealed container 5. The head motor 19 includes a coil 20 fixed to the other end of the head arm 16, and a voice coil motor including a pair of magnets 21 and a yoke 22 disposed above and below the coil 20.

In the sealed container 5, the hard disk 10 is driven to rotate at high speed by the motor shaft 8 of the disk motor 6, while the head arm 16 is oscillated about the arm shaft 12 by the head motor 19, so that the floating disk The hard disk 10 is tracked in a substantially radial direction by a head 18, and recording and / or reproduction of the hard disk 10 is performed.

[Problems to be solved by the invention]

However, the conventional hard disk device has a cantilever structure in which both the motor shaft 8 and the arm shaft 12 are supported only at the lower ends 8b and 12b. Accordingly, the upper end 8a of the motor shaft 8 and the arm shaft 12,
12a is bent in the directions of arrows a and b, and the hard disk 1
The positional accuracy between the head 0 and the head arm 16 tends to be out of order. That is, the upper end 8a of the motor shaft 8 and the arm shaft 12,
When the distance l between the axes changes due to the bending of the shaft 12a, off-tracking of the floating head 18 with respect to the hard disk 10 occurs, and the upper ends 8a, 12 of the motor shaft 8 and the arm shaft 12 are moved.
When the parallelism of a changes, the contact state of the floating head 18 with the hard disk 10 deteriorates (such as the attachment of the head 18 to the hard disk 10). Further, there is a problem that it is very difficult to adjust the parallelism between the motor shaft 8 and the arm shaft 12 having a cantilever structure.

Further, when the hard disk 10 and the head arm 16 are pivotally supported by using the bearings 15 and the like, the oil flowing out of the bearings 15 and the like adheres to the recording surface of the hard disk 10 and the floating head 18 so that the floating head 18 There was also a problem of sticking to the hard disk 10 or causing a head crash.

ADVANTAGE OF THE INVENTION This invention can improve the mutual positional accuracy of a disk-shaped recording medium and a head arm, can make the thickness of a base and a cover thin, and also assembles a sealed container accurately and easily. It is another object of the present invention to provide a disk drive device capable of effectively preventing a head crash or the like due to oil adhesion.

[Means for solving the problem]

In order to achieve the above object, a disk drive according to the present invention includes a sealed container including a base and a cover, first and second through holes provided in the base so as to penetrate the base, First and second through-holes respectively provided in the cover so as to penetrate the cover, and one ends of the first and second through-holes are inserted into the first base-side through-holes and fixed to the base. By being inserted into the first cover-side through-hole and fixed to the cover, it is installed between the base and the cover and mounted in the sealed container, and reference holes for positioning are provided at both end surfaces thereof. And a first support shaft having one end inserted into the second base-side through-hole and fixed to the base, and the other end inserted into the second cover-side through-hole. Hippo By being fixed to the base, it is installed between the base and the cover and mounted in the sealed container so as to be parallel to the first support shaft, and reference holes for positioning are respectively provided on both end surfaces thereof. Second formed
A spindle, a fixing member for fixing the cover to the base, a disc-shaped recording medium mounted on the first spindle, and rotating the disc-shaped recording medium with respect to the sealed container. A first bearing provided to enable the operation, a head arm having a base end mounted on the second support shaft and a floating head provided at a distal end thereof, and A second bearing provided to enable the head arm to rotate;
A first oil outflow preventing means, which is formed annularly so as to substantially surround the end surface of the first bearing near both ends of the support shaft, and which prevents oil from flowing out from the first bearing; A second oil outflow preventing means which is formed in a ring shape so as to substantially surround the end face of the second bearing near both ends of the second support shaft, and which prevents oil from flowing out from the second bearing; It has.

[Action]

According to the disk drive configured as described above,
Since both ends of the first and second support shafts parallel to each other are supported by the base and cover of the sealed container in a double-supported structure, even if the sealed container is subjected to impact, vibration, or the like, the first and second shafts are supported. It is unlikely that the center-to-axis distance and parallelism of the support shafts will be out of order. Further, since the first and second support shafts which are parallel to each other connect the base and the cover of the sealed container, the sealed container is strongly reinforced by the first and second support shafts. further,
The jig measures the distance between a pair of positioning holes formed on the base-side end surface and the cover-side end surface of the first and second support shafts, and determines the first and second support shafts. The cover can be fixed to the base by the fixing member while achieving the parallelism of the above. In addition, the oil can be prevented from being scattered from the first and second bearings toward the disk-shaped recording medium and the head in the sealed container by the oil spill-out prevention means. Can be effectively prevented.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a hard disk device will be described with reference to FIGS. The same components as those of the conventional example shown in FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted.

First, as shown in FIG. 1 and FIG.
The upper and lower ends 24a, 24b and 25a, 25b of the upper and lower sides 4 and 25 are respectively formed by through holes provided in the base 1 and the cover 2 of the sealed container 5, respectively.
The pair of support shafts 24 and 25 are fitted into the inside of the hermetically sealed container 5 in a vertical and parallel manner by being fitted and fixed into the insides a and 27b by press fitting or bonding.

At this time, the base 1 and the cover 2 are accurately fitted from above and below by a plurality of positioning pins 28 and positioning holes 29, and are tightened and fixed by a plurality of screws 4 as fixing members. By correctly assembling the base 1 and the cover 2, it is possible to assemble the pair of support shafts 24 and 25 in parallel without adjustment. Further, a pair of upper and lower reference holes 30a, 30b and 31a, 31b for positioning are provided at the centers of upper and lower ends 24a, 24b and 25a, 25b of the pair of support shafts 24, 25, and these reference holes 30a, 30b are provided. , 31a and 31b are measured with a jig, and the parallelism (verticality) of the pair of support shafts 24 and 25 is measured.
It is also possible to assemble the base 1 and the cover 2 while fixing them with the screws 4.

A hard disk 10 as a disk-shaped recording medium and a head arm 16 are mounted on the outer periphery of the pair of support shafts 24 and 25.

A disk hub 33 is rotatably mounted on the outer periphery of the support shaft 24 via a pair of upper and lower bearings 32, and one or a plurality of upper and lower hard disks 10 are mounted on the outer periphery of the disk hub 33 by a spacer 34, a disk holder 35 and a plurality of disks. Are fixed horizontally by screws 36. The head arm 16 is a spindle
25, it is mounted horizontally and swingably via a pair of upper and lower bearings 15 as in the conventional case.

The disk motor 6 has a magnet 37 and a rotating yoke 38 mounted horizontally at the lower end of the disk hub 33 at an interval vertically, and a plurality of coils 40 mounted on a stator substrate 39 therebetween. Are arranged horizontally. However, the stator substrate 39 is fixed on the base 2 by a plurality of screws 41. Accordingly, a rotor constituted by the magnet 37 and the rotating yoke 38 of the disk motor 6 is integrally formed at the lower end of the disk hub 33.

A bearing spacer 42 and a bearing preload spring 43 are fitted around the outer circumferences of the pair of support shafts 24 and 25, respectively. As means for preventing oil from flowing out between the disk hub 33 and the head arm 16 and the base 1 and the cover 2 above and below the outer periphery of the pair of bearings 32 and 15, an annular projection 44 and an annular groove are provided. An annular labyrinth 46 is formed. Therefore, these annular labyrinths 46 are formed at the upper and lower ends 24 of the pair of support shafts 24, 25.
Upper bearing 3 around a, 24b and 25a, 25b
Each pair of bearings 32 surrounds the upper end surface of 2, 15 and the lower end surface of the lower bearing 32, 15, respectively.
And 15 prevent dust and oil from flowing into the sealed container 5.

In the hard disk device configured as described above, the upper and lower ends 24a, 24b and 25a, 25b of the pair of support shafts 24, 25 are supported by the base 1 and the cover 2 of the sealed container 5 in a double-supported structure. Even if the sealed container 5 receives an impact, vibration, or the like, no deviation occurs in the center distance l and the parallelism between the pair of support shafts 24, 25 at all. Therefore, the positional accuracy between the hard disk 10 and the head arm 16 mounted on the outer circumference of the pair of support shafts 24 and 25 does not change at all. Further, since the pair of support shafts 24 and 25 also serve as reinforcing columns for reinforcing between the base 1 and the cover 2, the strength and rigidity of the sealed container 5 can be improved.

Next, FIG. 3 shows a modified example, in which the upper and lower ends 24a, 24b and 25a, 25b of a pair of support shafts 24, 25 are used as a base 1.
A pair of upper and lower bearings 48, 49 attached to the
And a pair of support shafts 24 and 25 are configured as rotary shafts. Therefore, in this case, the disk hub 33 and the head arm 16 can be fixed to the outer periphery of the support shafts 24 and 25 by press fitting or the like. Also, an annular labyrinth
46 is a pair of support shafts 24, 25 both upper and lower ends 24a, 24b and 25a, 2
Near 5b, it substantially surrounds the lower end surfaces of the upper bearings 48, 49 and the upper end surfaces of the lower bearings 48, 49, respectively.

In this modification, the same effects as those of the structure shown in FIGS. 1 and 2 can be obtained.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various effective changes can be made based on the technical idea of the present invention.

Further, the present invention is not limited to a hard disk device, but is applicable to various disk recording / reproducing devices for recording and / or reproducing various disk-shaped recording media.

〔The invention's effect〕

The present invention is configured as described above, and has the following effects.

Both ends of a first spindle on which the disk-shaped recording medium is mounted and a second spindle on which the base end of the head arm is mounted,
The first and second support shafts, which are parallel to each other, are inserted into the base-side through-hole and the cover-side through-hole, respectively, and fixed to the base and the cover of the sealed container. It was configured to be supported by. Therefore, even if the sealed container formed of the base and the cover receives an impact, vibration, or the like, the first and second support shafts are less likely to be out of alignment and the degree of parallelism between the first and second support shafts. It is unlikely that the positional accuracy between the disk-shaped recording medium and the head arm, which are respectively mounted on the head, is deviated. For this reason, the shock resistance and the vibration resistance can be improved, so that the off-track of the head with respect to the disk-shaped recording medium and the deterioration of the contact state of the head with the disk-shaped recording medium can be prevented beforehand.

Further, since both ends of the first and second support shafts parallel to each other are inserted into the base side through-hole and the cover side through-hole, respectively, and are fixed to the base and the cover of the sealed container. By connecting the base and the cover of the sealed container with the first and second spindles, the sealed container can be reinforced firmly. Therefore, the strength and rigidity of the sealed container can be improved,
It is possible to reduce the weight of the sealed container by reducing the thickness of the base and the cover.

In addition, both ends of the first and second spindles are inserted into the base-side through-hole and the cover-side through-hole, respectively, and are fixed to the base and the cover of the sealed container. Reference holes for positioning were formed on both end faces. Accordingly, immediately before the fixing member is fixed to the base by the fixing member, a pair of positioning holes formed on the base-side end surfaces of the first and second support shafts and exposed to the outside of the base. The distance between the first and second support shafts is measured with a jig, and the distance between the pair of positioning holes formed on the end face on the cover side and exposed outside the cover is measured with a jig. The cover can be fixed to the base by the fixing member while increasing the accuracy. For this reason, the process of assembling the sealed container from the base and the cover with the first and second support shafts parallel to each other can be performed accurately and easily.

Further, first and second bearings are provided to enable the disk-shaped recording medium and the head arm to be rotatable with respect to the sealed container, respectively, and the first and second bearings are provided.
Around the both ends of the support shaft, the first and second oil outflow preventing means formed in a ring shape so as to substantially surround the end faces of the first and second bearings respectively. Prevented oil spill. Therefore, since there is no possibility that the oil is scattered from the first and second bearings toward the disk-shaped recording medium or the head in the sealed container, it is possible to effectively prevent a head crash or the like due to the adhesion of the oil. it can.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional side view showing an essential part in an expanded state, and FIG.
The figure is an exploded perspective view showing the whole, and FIG. 3 is a longitudinal sectional side view showing a modified example in an expanded manner. FIG. 4 is a longitudinal sectional side view showing a conventional example in an expanded manner. In addition, in the reference numerals used in the drawings, 1 ... base 2 ... cover 4 ... screws (fixing member) 5 ... sealed container 10 ... hard disk (disk-shaped recording medium) 15, 32, 48, 49 ... ... Bearing 16 ... Head arm 24 ... Support shaft 24a, 24b ... Support shaft both ends 25 ... Support shaft 25a, 25b ... Support shaft both ends 26a, 26b, 27a, 27b ... Mounting hole (through hole) 30a , 30b, 31a, 31b ... Positioning reference holes 46 ... Labyrinths (oil outflow prevention means).

Claims (1)

(57) [Claims] 1. A sealed container comprising a base and a cover, first and second through holes respectively provided in the base so as to penetrate the base, and a cover formed in the cover so as to penetrate the cover. First and second through holes provided, one end of which is inserted into the first base side through hole and fixed to the base, and the other end is inserted into the first cover side through hole. A first support shaft which is mounted between the base and the cover by being fixed to the cover, is mounted in the sealed container, and has reference holes for positioning at both end surfaces thereof; One end of the base is inserted into the second base-side through-hole and fixed to the base, and the other end is inserted into the second cover-side through-hole and fixed to the cover. Hippo A second support shaft which is mounted between the first support shaft and the first support shaft so as to be parallel to the first support shaft, and has a reference hole for positioning at both end surfaces thereof; A fixing member for fixing the cover to the base; a disk-shaped recording medium mounted on the first support shaft; and a rotatable disk-shaped recording medium with respect to the sealed container. A first bearing provided on the second support shaft, a head arm having a base end mounted on the second support shaft and a floating head provided on a front end thereof, and the head arm being mounted on the sealed container. A second bearing provided so as to be rotatable; and an annularly configured to substantially surround an end face of the first bearing near both ends of the first support shaft; Of oil from First to prevent out 1
An oil outflow preventing means, which is formed in an annular shape so as to substantially surround the end face of the second bearing near both ends of the second support shaft to prevent oil from flowing out of the second bearing. Second
A disk drive device comprising: an oil outflow prevention means.