JPH0366085A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the mutual position accuracy between a disk recording medium and a head arm by mounting the disk recording medium and the head arm on an outer circumference of a couple of support shafts whose both ends are fitted to a base of an enclosed package and a cover. CONSTITUTION:Both of upper and lower ends 24a, 24b, 25a, 25b of a couple support shafts 24, 25 are fitted to a couple of upper/lower mount holes 26a, 26b, 27a, 27b provided on a base 1 and a cover 2 of an enclosed package 5 with press fit or bonding, and a couple of the support shafts 24, 25 are fitted in the enclosed package 5 perpendicularly in parallel. Through the constitution above, even when the enclosed package 5 is subjected to shock or vibration, no defect is caused to inter-shaft distance l and parallelism of the shafts 24, 25, and then mutual position accuracy between a disk recording medium 10 and an head arm 16 fitted to the outer circumference of the support shafts 24, 25 is improved.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is applied to, for example, a hard disk drive.
The present invention relates to a suitable disc recording and reproducing apparatus, and particularly to one that performs recording and/or reproducing of a disc-shaped recording medium in a sealed container.

[Summary of the invention]

The present invention provides a disc recording and reproducing apparatus in which a disc-shaped recording medium and a head arm for recording and/or reproducing the disc-shaped recording medium are housed in a sealed container.
By mounting the disc-shaped recording medium and the head arm on the outer periphery of a pair of support shafts that have both ends mounted on the base and cover of the sealed container, the mutual positional accuracy of the disc-shaped recording medium and the head arm can be improved. This is something that can be improved.

[Conventional technology]

Conventionally, hard disk devices have been developed, for example, by
As seen in Japanese Patent Publication No. 275082, a hard disk drive, a hard disk drive, and/or a playback head arm are housed in an IIM container.

Conventional hard disk devices usually have a base 1 made of aluminum die-casting or the like, as shown in Figure 4.
Insert a gasket between the outer periphery of the cover 2 and the
The base 1 and the cover 2 are fixed to each other from above and below by screws 4 at the four corners to form a tight needle container 5. and,
A disk motor 6 is fixed on the base 1 in the sealed container 5 with a plurality of screws 7, and one disk or a plurality of disks are attached to the disk 9 provided on the outer periphery of the upper end 8a of the motor shaft 8 of the disk motor 6. A hard disk 10, which is a disk-shaped recording medium, is fixed horizontally with a plurality of screws 11. In addition, the arm shaft 1 is placed on the base 1 in this tight needle container 5.
2 is fixed with a plurality of screws 14 via a bearing block 15, and a head arm 16 is attached to the outer periphery of the upper end 12a of the arm shaft 120 via a pair of upper and lower bearings 15 so as to be able to swing horizontally. 1 on one end
One or (I) number of floating heads 18 are mounted via a head support member 17 having elasticity such as one or more upper and lower leaf springs. The head motor 19 has a coil 20 fixed to the other end of the head arm 16, and
It is constituted by a voice coil motor, etc., each consisting of a pair of magnets 21 and a yoke 22 arranged above and below.

In the tight needle container 5, the hard disk 10 is rotated at high speed by the motor shaft 8 of the disk motor 6, while the head arm 16 is driven by the head motor 19.
The floating head 1 is driven to swing around the arm shaft 12.
8, the hard disk 10 is tracked substantially in the radial direction, 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 had a cantilever structure in which both the motor shaft 8 and the arm shaft 12 were supported only at their lower ends 8b and 12b. Therefore, the motor shaft 822 and arm shaft 12 may be affected by shocks, vibrations, etc. received by the container 1.
The upper i8a and 12a are deflected in the directions of arrows a and b,
The mutual positional accuracy between the hard disk 10 and the head arm 16 is likely to be inconsistent. That is, when the distances M and 6 between the zero axes change due to the deflection of the upper ends 8a and 12a of the motor shaft 8 and the arm shaft 12, off-trunk of the floating head 18 with respect to the hard disk 10 occurs, causing the motor @
8 and the upper ends 8a and 12a of the arm shaft 12 change, the floating head 18 relative to the hard disk 10 changes.
There were five problems when the contact condition of the head 18 deteriorated (for example, the head 18 was attached to the hard disk 10). Also,
There is also a problem in that it is very difficult to adjust the parallelism between the motor shaft 8 and the arm shaft 12, which have a cantilevered structure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk recording and reproducing apparatus that can improve the relative positional accuracy of a disk-shaped recording medium and a head arm.

[Means to solve the problem]

In order to achieve the above object, the disk recording and reproducing apparatus of the present invention is provided with a pair of support shafts installed in parallel in the sealed container, with both ends of the base of the sealed container and the cover toned, and a disk-shaped recording medium and a head. An arm is attached to the outer periphery of the pair of support shafts.

[For production]

In the disk recording/reproducing device configured as described above, both ends of the pair of spindles are supported by the base and cover of the sealed container in a double-sided structure, so that the sealed container can be protected from shocks, vibrations, etc. , there is no deviation in the distance and parallelism between the pair of support shafts. Therefore, there is no error in the relative positional accuracy of the head arm and the disk-shaped recording medium mounted on the outer periphery of the pair of support shafts.

〔Example〕

An embodiment in which the present invention is applied to a hard disk drive will be described below with reference to FIGS. 1 to 5.

Note that the same structural parts as in the conventional example shown in FIG. 4 are given the same reference numerals, and redundant explanation will be omitted.

First, as shown in FIGS. 1 and 2, a pair of support shafts 24
．． The upper and lower ends 24a, 24b and 25a, 25b of 25 are a pair of upper and lower mounting holes 26a provided in the base 1 and the canopy (-2) of the tight needle container 5.

The pair of support shafts 24 and 25 are fitted and fixed by press-fitting or adhesive into the insides of the shafts 26b, 27a, and 27b, and are mounted vertically and parallel to each other within the sealed container 5.

At this time, the base 1 and the canopy 2 are accurately fitted from above and below using the plurality of positioning pins 28 and the positioning holes 29, and are tightened and fixed with the plurality of screws 4, so that the base 1 and the canopy <- 2, it is possible to assemble the pair of support shafts 24 and 25 in parallel without any adjustment.

Also, both upper and lower ends 24a of a pair of support shafts 24.25.

A pair of upper and lower positioning reference holes 30a, 30b and 31a, 31b are provided at the centers of 24b, 25a, 25b, and these reference holes 30a, 30b, 31a, 3i
b is measured with a jig, and the parallelism of the pair of support shafts 24.25 (
While maintaining verticality, attach base 1 and cover 2 with screw 4.
It is also possible to assemble it by fixing it with.

An eleventh disk 10, which is a disk-shaped recording medium, and a head arm 16 are attached to the outer periphery of the pair of support shafts 24,25.
is installed.

A disk/1 disk 33 is rotatably attached to the outer periphery of the support shaft 24 via a pair of upper and lower bearings 32, and one or several hard disks 10 are mounted on the outer periphery of the disk/1 disk 33 with spacers 54, It is fixed horizontally by a disk holder 35 and a plurality of screws 36. The head arm 16 is horizontally attached to the outer periphery of the support shaft 25 via a pair of upper and lower bearings 15, as in the conventional case, so as to be able to swing freely.

The disc motor 6 has a magnet 37 and a rotary yoke 38 arranged vertically at the lower end of the disc/1 drive 33 at intervals.
are mounted horizontally in parallel, and a plurality of coils 40 mounted on the stator board 39 are arranged horizontally between them.

However, the stator board 39 has a plurality of screws 41 on the base 2.
is fixed by. , therefore, the disk motor 6
A rotor constituted by a magnet 37 and a rotating yoke 38 is integrally formed at the lower end of the disk hub 33.

Further, a bearing spacer 42 and a bearing preload spring 43 are fitted to the outer peripheries of the pair of support shafts 24 and 25, respectively. Under the outer periphery of the pair of upper and lower bearings 52 and 15, the disk/1 pump 33 and the head arm 1
A labyrinth 46 formed by an annular protrusion 44 and an annular groove 45 is provided between the base 1 and the cover 2 to prevent dust, oil, etc. from entering the sealed container 5 from each pair of bearings 32 and 15. is prevented from being leaked.

The hard disk device configured as described above includes the upper and lower ends 24a, 24b, and 25a of the pair of support shafts 24.25,
25b is supported by the base 1 and cover 2 of the sealed container 5 in a double-sided structure, so even if the sealed container 5 is subjected to shock or vibration, the distance between the axes 1 and 25 of the pair of support shafts 24 and 25 will be maintained. There is no deviation in parallelism at all. Therefore, a pair of supporting shafts 24.25
There is no deviation in the mutual positional accuracy between the hard disk 10 and the head arm 16 mounted on the outer periphery of the head arm.

The pair of support shafts 24 and 25 also serve as reinforcing columns that reinforce the space between the base 1 and the cover 2, so the sealed container 5
The strength and rigidity of china clay can be improved.

Next, FIG. 6 shows a modified example, in which upper and lower ends 24a, 24b and 25a, 2 of a pair of support shafts 24.25 are shown.
5b is rotatably supported by a pair of upper and lower bearings 48, 49 attached to the base 1 and cover 2, and these pair of support shafts 24, 25 are configured as rotating shafts. Therefore, in this case, the disk hub 33 and head arm 16
can be fixed to the outer periphery of the support shaft 24, 25 by press-fitting or the like.

This modified example can also achieve the same effects as the structure shown in FIGS. 1 and 2.

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

Furthermore, the present invention is not limited to hard disk devices, but can be applied to various disk recording and reproducing devices that record and/or reproduce various types of disk-shaped recording media.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Both ends of the pair of support shafts are supported by the base and cover of the sealed container in a rainproof structure, so that even if the sealed container is subjected to shock or vibration, the distance between the shafts and the parallelism of the pair of support shafts will not be distorted. Since the ff1K is used to prevent this from occurring, and to prevent deviations in the mutual positional accuracy between the disk-shaped recording medium and the head arm attached to the outer part of the pair of support shafts, the impact resistance and vibration resistance are improved. This makes it possible to prevent the head from off-tracking with respect to the disk-shaped recording medium and from deteriorating the contact state of the head with the disk-shaped recording medium.

By accurately assembling the base and cover of the tight needle container, it is possible to assemble the pair of support shafts in parallel without any adjustment.

Since the base and cover of the sealed container can be connected and reinforced using a pair of spindles, the strength and rigidity of the sealed container can be improved, and the wall thickness of the base and cover can be reduced. , it is possible to reduce the weight of the tight needle container.

[Brief explanation of drawings]

FIGS. 1 to M3 show an embodiment of the present invention, in which FIG.
The figure is an exploded perspective view showing the whole, and FIG. 5 is a longitudinal cross-sectional side view showing a modified example developed. FIG. 4 is a vertical cross-sectional side view showing the conventional example developed. In addition, the symbols used in the drawings are (.・・・・・・・・・ 6 ・・・・・・・・・ 4 ・・・・・・・・・ 4 a , 2 5 ・・・・・・・ 5 a , 2 Bene cover densely pierced container hard disk (Disk-shaped recording medium head arm support shaft 4b...Both ends of the support shaft Support shaft 5b...Both ends of the support shaft Representative Masaru Tsuchiya

Claims (1)

[Scope of Claims] A disc recording/reproducing device in which a disc-shaped recording medium and a head arm for recording and/or reproducing the disc-shaped recording medium are housed in a sealed container, comprising: a base and a cover of the sealed container; A disc recording/reproducing device characterized in that a pair of support shafts are installed in parallel within the sealed container with both ends thereof extending over the container, and the disc-shaped recording medium and the head arm are attached to the outer periphery of the pair of support shafts. Device.