JPH1166832A - Muffling structure of hard disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaged structure maintaining reliability of a hard disk function by reducing noises of the hard disk itself and also efficiently dissipating heat generated from the hard disk. SOLUTION: A muffling structure of a hard disk 1 built in a computer has a noise-insulating box comprising a base 2 for installing the hard disk 1 thereon and a cover 3 for covering the hard disk 1, and a cooling fan 4 for cooling the noise-insulating box, and the cooling fan 4 is installed so as to either project outwards from the cover or house inside the cover. The noise-insulating box comprises a sound-absorbing material 6 put on the inside walls and a vibration- proof material 5 put between the base and the hard disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a hard disk incorporated in a personal computer or the like, and more particularly to a mounting structure for reducing noise generated from the hard disk and improving heat radiation.

[0002]

2. Description of the Related Art Conventionally, regarding a mounting structure of a hard disk built in a personal computer or the like, there are cases where a hard disk is directly mounted on a housing and no special measures for noise reduction are taken. Almost.

[0003] Although not intended to directly reduce noise, a hard disk mounting portion is provided to prevent external vibrations from propagating to the hard disk or to prevent vibrations of the hard disk from transmitting to the housing. There is an example where a vibration isolator is attached to a vehicle. This is an example in which a vibration damping material is attached to keep the function of the hard disk normal, but as a result, noise of the hard disk may be reduced.

Further, as a special example, the hard disk is confined in a sound insulation box including a sound absorbing material, a heat sink provided on the layer of the sound absorbing material, and a heat conduction path between the heat sink and the hard disk to reduce noise. Some are trying to do it.

FIGS. 8 and 9 show the structure of the above-mentioned conventional example. FIG. 8A is a plan view, and FIGS. 8B to 8D are side views. FIG. 9 is a cross-sectional view taken along the line AA of FIG. This conventional example has a silent disk drive structure described in US Pat. No. 5,510,954, in which a sound absorbing material 6 provided around the disk drive 1, a heat sink 16 provided in a layer of the sound absorbing material 6, a heat sink 16 and a disk And a heat conduction path 15 between the drive and the drive.

[0006]

The above-mentioned prior art has the following problems.

First, in the case of a structure in which a vibration isolating material is attached to the mounting portion of the hard disk, the noise of the hard disk itself cannot be reduced, and the vibration of the hard disk resonates the housing of the mounting portion. The only effect is to prevent it. Therefore, when the noise generated by the hard disk itself is compared with the noise generated by resonance of the mounting unit housing with respect to this noise, the noise generated by the hard disk itself is much larger, and the noise reduction effect of the vibration damping material is obtained. There is no.

[0008] Even if there is no vibration isolating material, if the mounting portion housing has a structure that does not resonate, there is no noise reduction effect by the vibration isolating material.

Further, there is the following problem in the system in which the hard disk is completely housed in the box of the sound absorbing material.

First, there is a problem of heat radiation of the hard disk. Hard disks have a large amount of self-heating and need to be kept at a certain environmental temperature or lower in order to ensure functional reliability. However, when the hard disk is completely housed in the box of the sound absorbing material, the heat radiation effect cannot be expected depending on the surrounding air environment. Therefore, heat is dissipated by the heat sink outside the sound insulation box through the heat conduction path.However, in the case of a hard disk with a large amount of heat generation, there is a limit to the heat radiation with the heat sink alone, and it is difficult to keep the hard disk below a certain environmental temperature There is a problem.

Further, in order to increase the heat radiation efficiency, it is necessary to increase the shape of the heat sink, and there is a problem that the space required for the countermeasure becomes large.

Further, the reliability of the hard disk is stipulated as a mounting condition of the hard disk such that a fixed distance from other mounted objects is secured except for a mounting portion. This is because the breathing holes provided in the disk enclosure of the hard disk for maintaining the atmospheric pressure are not blocked, and no stress is applied to the hard disk. However, in the conventional example, there is a problem that the heat conduction path comes into direct contact with the hard disk, thereby affecting the reliability of the hard disk function.

An object of the present invention is to reduce the noise of the hard disk itself in order to solve the above-mentioned problems.

Another object of the present invention is to efficiently dissipate the heat generated from a hard disk,
An object of the present invention is to provide a mounting structure for maintaining reliability of a hard disk function.

[0015]

In order to achieve the above object, a sound damping structure for a hard disk according to the present invention comprises a base for mounting the hard disk and a cover for covering the hard disk. A sound insulating box surrounding the hard disk with a base and a cover; and a cooling fan for forcibly cooling the inside of the sound insulating box, and the noise of the hard disk inside the sound insulating box is suppressed by the sound insulating box.

It is preferable that the sound insulation box has a sound absorbing material attached to the inner surface of the cover.

Further, it is preferable that the sound insulation box has a vibration isolator attached to the base between the base and the hard disk.

Further, it is preferable that the sound insulation box has a space around the hard disk so as to secure an air flow by the cooling fan.

Further, it is preferable that the sound insulation box has a discharge port for circulating and discharging the airflow from the cooling fan around the hard disk.

Further, it is preferable that the sound insulation box has a packing at a joint portion between the base and the cover so that the air flow by the cooling fan is circulated around the hard disk.

Preferably, a cooling fan is provided to protrude from the cover.

Further, it is preferable that a cooling fan is provided so as to be housed inside the cover.

Furthermore, it is preferable that the computer is a personal computer.

As described above, in the present invention, in particular, in a hard disk mounting structure mounted on a personal computer or the like, a sound insulation box having a space around a hard disk constituted by a base for mounting the hard disk and a cover for covering the hard disk is provided. The problem of the above-described conventional example is solved by mounting a hard disk therein and performing forced air cooling inside the sound insulation box by a cooling fan.

The mechanism by which the noise caused by the hard disk leaks to the outside of a device such as a personal computer can be roughly classified into the following two mechanisms. The first mechanism is that the motor rotation noise caused by the rotation of the disk motor inside the hard disk is directly emitted to the outside of the device by air propagation. The second mechanism is that vibration caused by rotation of a disk motor propagates to a base on which a hard disk is mounted, and as a result, structural components resonate to increase noise and leak outside the device.

According to the present invention, noise leaking to the outside of the apparatus is reduced by the following operation.

First, as for the noise generated from the hard disk, which is the first mechanism, and transmitted through the air, the noise insulation effect of the sound insulation box, which is constituted by the base on which the hard disk is mounted and the cover which covers the hard disk, and to which the sound absorbing material is attached, is described. The noise emitted to the outside of the sound insulation box is reduced by the sound absorbing effect. In addition, by attaching a vibration isolator to the base of the hard disk attachment portion, it is possible to insulate the rotational vibration of the disk motor, which is the second mechanism, from propagating to the base, thereby preventing resonance of the components and preventing noise.

Further, with respect to the heat generated by the hard disk, the cooling fan allows air to circulate in the space around the hard disk and is discharged from the discharge port, thereby maintaining the functional reliability of the hard disk.

[0029]

Next, an embodiment of the present invention will be described.
This will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing the configuration of an embodiment of a sound deadening structure of a hard disk according to the present invention. In this silencing structure, the base 2 and the cover 3 are attached so as to sandwich the hard disk 1. The hard disk 1 is fixed to the base 2 by screws 7, and a vibration isolator 5 is disposed between the hard disk 1 and the hard disk 1. The cover 3 is attached to the base 2 so that the hard disk 1 faces the base 2 with the hard disk 1 therebetween.
Are fixed by screws 8. The cover 3 is provided with a cooling fan (dedicated fan) 4 fixed by screws 9, and includes a sound absorbing material 6 attached to the cover 3 between the cover 3 and the hard disk 1. In this manner, the hard disk 1 is mounted in a sound insulation box constituted by the base 2 and the cover 3.

Next, the operation of the embodiment of the sound deadening structure of the hard disk of the present invention will be described with reference to FIGS. FIG. 2 is a view showing a structure after assembly according to the present invention.
2A shows a plan view, and FIGS. 2B to 2D show side views. FIG. 3 is a sectional view taken along line AA of FIG.
FIG. 4 is a sectional view taken along line BB of FIG.

First, with respect to the noise generated from the hard disk 1 and transmitted through the air, a part of the noise energy is converted into heat energy by the sound absorbing material 6, so that the noise is reduced. Next, the noise energy remaining without being converted to heat energy is further reduced due to the sound insulation effect (reflection / conversion to heat energy) of the sound insulation box constituted by the base 2 and the cover 3. As a result of the two-stage noise reduction, the noise leaking to the outside of the sound deadening structure of the present invention can be expected to be reduced by about 5 dB (A) from the noise generated from the hard disk 1 first. A disk motor 10 shown in a sectional view of FIG. 3 is disposed inside the hard disk 1, and vibration generated by rotation of the disk motor 10 is insulated by a vibration isolator 5 attached to the base 2. . As a result, the vibration is absorbed by the vibration isolator 5 of the base 2 and the occurrence of resonance with other structural components is prevented, and as a result, noise reduction of about 2 dB (A) is achieved. Further, the heat emitted from the hard disk 1 is released by forced air cooling of the dedicated fan 4 attached to the cover 5. That is,
As shown in the sectional view of FIG. 4, the dedicated fan 4 sucks and discharges in the direction of the arrow. To explain in more detail,
The air inside the sound insulation box circulates, and the discharge port 1 shown in FIG.
1 is emitted outside the silencing structure of the present invention. A space is provided around the hard disk 1 so that air can be circulated by the dedicated fan 4. 2 so that the air circulation of the dedicated fan 4 is collected at the outlet 11.
A packing 12 as shown in (d) may be provided. The noise generated by the dedicated fan 4 is negligibly small compared to the noise generated by the hard disk 1, and therefore does not adversely affect the noise reduction structure of the present invention. For example, the noise of the hard disk 1 is about 35 dB (A), while the noise of the dedicated fan 4 is 20 dB.
(A).

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a view showing a structure after assembly according to another embodiment of the present invention. FIG. 5A is a plan view, and FIGS. 5B to 5D are side views. 6 is a sectional view taken along the line AA of FIG. 5A, and FIG. 7 is a sectional view taken along the line BB of FIG. 5A. In the above-described embodiment of FIG. 2, the dedicated fan 4 is attached to the outside of the upper surface of the cover 3. However, the attachment position of the dedicated fan 4 is not limited to this, and another embodiment as shown in FIG. It is also possible. That is, the dedicated fan 4 is not attached to the outside of the cover 3 but is accommodated and attached inside the cover 3. Further, although the position of the discharge port 11 for releasing heat to the outside of the silencing structure is not shown, it may be provided at any place where the heat can be released. further,
The position where the sound absorbing material 6 is attached is not limited to this.
Further, by providing a packing between the base 2 and the cover 3, noise can be further reduced.

[0034]

As described above, in the sound-absorbing structure of a hard disk according to the present invention, the hard disk is housed in a sound-insulating box with a sound-absorbing material, and the sound-insulating material insulates the vibration of the hard disk to prevent resonance of the structural components. In. Therefore,
This has the effect of reducing the noise of the hard disk.

Further, since forced air cooling is performed inside the sound insulation box by the special fan, the heat generated by the hard disk is efficiently radiated, and the function reliability of the hard disk can be maintained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing the structure of an embodiment of the present invention, and (a).
Is a plan view, and (b) to (d) are cross-sectional views.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a view showing the structure of another embodiment of the present invention;
(A) is a plan view, and (b) to (d) are side views.

FIG. 6 is a sectional view taken along line AA of FIG.

FIG. 7 is a sectional view taken along the line BB of FIG.

8A and 8B are diagrams showing a structure of a conventional example, wherein FIG. 8A is a plan view and FIGS. 8B to 8D are side views.

FIG. 9 is a cross-sectional view showing a structure of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard disk 2 Base 3 Cover 4 Cooling fan 5 Anti-vibration material 6 Sound absorbing material 7 Hard disk fixing screw 8 Cover fixing screw 9 Fan fixing screw 10 Disk motor 11 Discharge port 12 Packing 13 Material having a function of heat conduction and vibration absorption 14 Metal bracket 15 Heat conduction path (copper plate) 16 Heat sink 17 Housing

Claims (9)

[Claims] 1. A sound damping structure for a hard disk built in a computer, comprising: a base on which the hard disk is mounted; and a cover for covering the hard disk, wherein the base and the cover surround the hard disk. And a cooling fan for forcibly cooling the inside of the sound insulation box, wherein the sound insulation box suppresses noise of a hard disk inside the sound insulation box. 2. The sound insulation box according to claim 1, further comprising a sound absorbing material attached to an inner surface of the cover.
Hard disk silence structure described in. 3. The hard disk muffling structure according to claim 1, wherein the sound insulation box has a vibration isolator attached to the base between the base and the hard disk. 4. The hard disk muffling structure according to claim 1, wherein said sound insulation box has a space around said hard disk for securing airflow by said cooling fan. 5. The sound damping structure for a hard disk according to claim 4, wherein the sound insulation box has a discharge port for circulating and discharging airflow from the cooling fan around the hard disk. 6. The sound insulation box according to claim 5, wherein a packing is provided at a joining portion between the base and the cover so that an air flow by the cooling fan circulates around the hard disk. Hard disk silence structure. 7. The muffling structure for a hard disk according to claim 1, wherein said cooling fan protrudes from said cover. 8. The muffling structure for a hard disk according to claim 1, wherein said cooling fan is provided so as to be housed inside said cover. 9. The hard disk muffling structure according to claim 1, wherein said computer is a personal computer.