JP3137716B2 - Hard disk case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk, and more particularly to a hard disk case incorporating a microminiature hard disk.

[0002]

2. Description of the Related Art Conventionally, as a kind of hard disk, a hard disk and its drive recording / reproducing mechanism, that is, a rotary drive motor of the disk, and a magnetic recording / reproducing device are provided in a case composed of a pair of mutually coupled case halves. A type incorporating a head is known. Hard disks of this type, like other storage devices, are required to be further miniaturized.

The hard disk case has a complicated shape in order to house the housing elements without space loss. For this reason, the hard disk case has conventionally been formed by die-casting an aluminum alloy. According to die casting,
Complex shapes can be formed relatively easily. However, as miniaturization has progressed, the following problems have arisen.

[0004] The first problem is that a thin portion of, for example, about 0.5 mm or less is generated in order to eliminate the space loss and to reduce the size, and poor flow of molten metal into the thin portion occurs. Further, even when the molten metal flow does not occur, a peeling phenomenon occurs due to a steeply inclined temperature distribution during cooling, and the peeled case strips fall into the case. It is well known that such fine dust causes fatal damage to a hard disk.

[0005] The second problem is the problem of vibration. In other words, since this hard disk contains not only the hard disk but also a motor that rotates it,
A motor can be a source of vibration. However, it is not possible to expect the effect of absorbing the vibration in a case that is reduced in size and thickness. In a very small hard disk aiming for a track interval of 1 to several μm, this vibration is fatal.

Further, there is a problem of a magnetic shield and heat radiation. As the miniaturization progresses and the case thickness decreases, the magnetic shield becomes insufficient, which adversely affects recording and reproduction.
In addition, in a small case made of aluminum die-cast in a sealed state, heat dissipation is also insufficient.

The above problems will be described more specifically with respect to the conventional hard disk case shown in FIGS. This hard disk case is shown in FIGS.
And a lid-side case half 20 shown in FIGS. 14 and 15. Both the body-side case half 10 and the lid-side case half 20 are formed by die casting of an aluminum alloy. The body side case half 10 is formed with a support portion 11 for the hard disk H and its drive motor M, and a support portion 12 for the magnetic head arm A and its swing drive mechanism D.
At the tip of the magnetic head arm A, a magnetic head MH for recording and reproducing information on and from the hard disk H is mounted.

On the other hand, the supporting portion 11 is
And a magnetic head arm support hole 22 corresponding to the support portion 12 are formed. Also, the body side case half 10 and the lid side case half 20
Are formed with a plurality of coupling holes 13 and 23 at the periphery thereof for coupling the two. In this conventional product, in order to reduce the size and thickness, portions 14 and 15 corresponding to the hard disk H and the swing drive mechanism D in the body side case half 10, and the periphery of the hard disk center hole 21 in the lid side case half 20. The above-described problem occurs when the thickness of the first 24 and its periphery 25 is reduced to, for example, about 0.4 mm.

[0009]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hard disk case which is excellent in vibration resistance without a risk of peeling of a thin portion. Another object of the present invention is to provide a hard disk case having excellent magnetic shielding properties and heat radiation properties.

[0010]

SUMMARY OF THE INVENTION The present invention provides a hard disk case which includes a pair of mutually connected case halves and houses therein a rotatably driven hard disk and a magnetic head arm for recording and reproducing information on and from the hard disk. In the above, at least one of the case halves is formed as a separate member from the case body having at least one through hole corresponding to at least the hard disk position, and is fixedly connected to the case body so as to be incapable of opening and closing. It is characterized by comprising a combination with a ground plate that closes the through hole, on which a support portion for the hard disk and a support portion for the magnetic head arm are formed.

The case body can be formed by, for example, die casting of an aluminum alloy or forging a stainless material, and the base plate can be formed by pressing a stainless material.

The base plate can be made of various materials depending on the required properties. For example, from the viewpoint of magnetic shielding, it is desirable that the ground plane be made of a magnetic material. Alternatively, from the viewpoint of vibration resistance, the base plate can be made of a damping steel plate or a vibration absorbing steel plate, and may have a laminated structure of these. In order to further enhance the heat dissipation, the ground plate can be made of a steel sheet having a corrugated cross section or a composite material containing the same.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments. 1 to 3 show a first embodiment of the present invention.
This embodiment is an embodiment of a body-side case half 30 whose shape is substantially the same as the conventional body-side case half 10. The case half 30 includes a case body 40 and a main plate 5.
And a case body 40
Has through holes 41 and 42 in the corresponding portion of the hard disk H and the corresponding portion of the swing drive mechanism D. The case body 40 can be formed by, for example, die casting of an aluminum alloy or forging of a stainless steel material.

The base plate 50 closes the through-holes 41 and 42 of the case body 40. The support plate 5 for the hard disk H and the drive motor M is provided at a portion corresponding to the through-hole 41.
The magnetic head arm A and the supporting portion 52 of the swing drive mechanism D are integrally provided at a portion corresponding to the through hole 42. The base plate 50 can be formed, for example, by pressing a stainless steel plate material.

The case body 40 and the base plate 50 are provided with coupling holes 43 and 53 in the peripheral portion thereof for coupling the two. The joining of the two can be performed by any means such as welding, brazing, soldering, bonding or the like, or these can be used in combination.

The case half 30 composed of the case main body 40 and the base plate 50 is formed by processing a plate material.
Can be formed, even if the plate thickness is about 0.4 mm or less, there is no possibility that a problem of peeling will occur, and the vibration resistance is far superior to that of a die-cast aluminum alloy product. In order to further increase the vibration resistance, a damping steel plate or a vibration absorbing steel plate can be used as the base plate 50. Further, by forming the base plate 50 from a magnetic material, the magnetic shielding property can be enhanced. Alternatively, the base plate 50 can be formed of a plate having a shape excellent in heat dissipation.

FIGS. 8 to 11 show examples of the plate material constituting the base plate 50. FIG. FIG. 8 shows a ground plate 50 composed of a corrugated plate 50a having a cross-sectional waveform, and FIG. 9 shows a corrugated plate 50a and a flat plate 50b.
FIG. 10 shows a ground plate 50 formed by combining a corrugated plate 50a with a pair of flat plates 50b.
Reference numeral 1 denotes a ground plate 50 having a laminated structure in which a pair of flat plates 50b are bonded via an adhesive layer 50c. According to the corrugated plate 50a, a high heat radiation effect can be expected. And in these ground plate structures, each plate material can be comprised from a damping steel plate or a vibration absorption steel plate, respectively. Further, in the base plate having a laminated structure, for example, a base plate having necessary properties in a well-balanced manner can be obtained by laminating plate materials having respective properties such as vibration resistance, magnetic shielding property, and corrosion resistance. In addition, as each plate material, a rolled material having a thickness of about 0.1 mm can be used.

Further, the base plate 50 is divided into a plurality of sections, and only a portion that causes vibration, for example, a portion corresponding to the drive motor M and the swing drive mechanism D is made of a damping steel plate or a vibration absorbing steel plate. Can be modified such as being made of another material. The plurality of components of the base plate 50 can be joined by any means such as welding, brazing, soldering, and bonding.

FIG. 7 shows another embodiment of the main plate 50A. This base plate 50A is used to support the hard disk H
Only 1A is formed as a separate member from a magnetic material, for example, a stainless steel material, and is combined with another ground plate 50 '. The base plate 50 'can be made of, for example, an aluminum alloy plate.

FIGS. 4 to 6 show another embodiment of the present invention. The case half 30 </ b> A of this embodiment includes a case body 40.
A and the main body 50A, the case body 40A
The through hole 42 of the case body 40 of the first embodiment is further enlarged to form a large through hole 42A, and the block 44 of the case body 40 which has been removed as a result of the enlargement is mounted as a separate block 54 on the main plate 50A side. ing. In this manner, some of the components on the case body 40 side can be provided on the main plate 50 side. Other parts are the same as the first embodiment,
The same portions are denoted by the same reference numerals.

In the above embodiment, the present invention is applied to one of the body half cases 10 of the pair of case halves. The invention can be applied.

[0022]

As described above, according to the present invention, the size and thickness of the hard disk case can be reduced to the utmost, and the problem of peeling of the thin portion does not occur. In addition, since the material of the base plate can be freely selected, vibration resistance,
Necessary properties such as magnetic shielding properties and heat dissipation properties can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a case main body showing an embodiment of a hard disk case according to the present invention.

FIG. 2 is a plan view showing an example of a base plate which is combined with the case main body of FIG. 1 to form a hard disk case.

FIG. 3 is a sectional view taken along the line AA in FIG. 1 and FIG.
It is sectional drawing of the separation state of a case main body and a ground plate which show the sectional view which follows the -B line together.

FIG. 4 is a plan view of a case main body showing another embodiment of the hard disk case according to the present invention.

FIG. 5 is a plan view showing an example of a base plate that is combined with the case main body of FIG. 4 to form a hard disk case.

6 is a sectional view taken along line CC of FIG. 4 and FIG.
It is sectional drawing of the separation state of a case main body and a ground plate which show the sectional view which follows the -D line together.

FIG. 7 is a sectional view corresponding to FIG. 3, showing another example of the main plate.

FIG. 8 is a sectional view showing an example of a sectional shape of a main plate.

FIG. 9 is a cross-sectional view showing another example of the cross-sectional shape of the main plate.

FIG. 10 is a sectional view showing still another example of a sectional shape of a main plate.

FIG. 11 is a cross-sectional view showing another example of the cross-sectional shape of the main plate.

FIG. 12 is a plan view of one half of a conventional hard disk case half.

FIG. 13 is a cross-sectional view of the support section taken along line EE.

FIG. 14 is a plan view of the other half of the conventional hard disk case half.

FIG. 15 is a sectional view taken along the line FF of FIG. 14;

[Explanation of symbols]

 30 30A Body side case half 40 40A Case body 50 50A Case body 41, 42 Through hole 50 50A Base plate 51 52 Supporting part H Hard disk

Claims (6)

(57) [Claims] 1. A hard disk which is provided with a pair of mutually connected case halves, and is rotatably driven therein and said hard disk.
Magnetic head arm for recording / reproducing information to / from disk
In hard case for housing the beam, at least one of the case halves, is formed as a separate member and the case body, the case body having one through-hole corresponding to at least the hard disk location, the case body It is opened and closed non immovably bound consists conjugate main plate which closes the through hole, this base plate, the support portion of the hard disk and magnetic head
A hard disk case formed with an arm support . 2. The hard disk case according to claim 1.
In, the case body is formed by die casting of an aluminum alloy or forging of a stainless steel material,
The base plate is a hard disk case formed by pressing stainless steel. 3. The hard disk according to claim 1, wherein:
In use case, the main plate, the case for a hard disk which is a magnetic material. 4. A hard disk case according to claim 3.
In, the main plate, the case for a hard disk which is a vibration damping steel plate or vibration absorbing steel. 5. The hard disk case according to claim 3.
, A hard disk case in which the base plate includes a steel sheet having a corrugated cross section. 6. A hard disk case according to claim 3.
In, ground plane, hard case for a laminated structure.