JP3123963B2 - Information processing device housing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing structure of an information processing apparatus, and more particularly, to a housing for suppressing external noise from a device serving as a noise source installed in the information processing apparatus. It is about structure.

[0002]

2. Description of the Related Art A device for achieving sound insulation or sound absorption from a noise source installed in a housing structure of a conventional information processing apparatus is, for example, as shown in FIG. That is, in the drawing, reference numeral 1 denotes a housing of the information processing apparatus,
2 is a cover, 3 is a device as a noise source (for example, a hard disk drive), and 4 is a sound absorbing material (or a sound insulating material).
It is.

A noise source 3 installed inside a housing 1 of an information processing apparatus is subjected to sound absorption or sound insulation by a sound absorbing material (or sound insulating material) 4 mounted on the inner wall of the housing 1 and the inner wall of the cover 2. , Is emitted to the outside in a reduced state,
Alternatively, the state is completely shut off. The sound absorbing material (or sound insulating material) 4 is mainly made of urethane foam, and is completely different from the material of the housing 1 of the information processing apparatus and the cover 2 that covers the housing opening.

[0004]

The problem here is that the sound absorbing material (or sound insulating material) 4 is made of a material completely different from that of the housing 1 and the cover 2, and the amount of used In most cases, attachment to the housing 1 is also performed by sticking means. Therefore, when the information processing apparatus is discarded, it is not easy to separate the information processing apparatus from the housing 1 or the cover 2 and the bulk of the information processing apparatus is large. Therefore, the environmental load increases as a living environment pollution source. That is.

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances. In an information processing apparatus having a built-in noise source, the noise from the information processing apparatus to the outside is reduced, so that the information processing apparatus can be used in a quiet work environment such as a general home. In use, the information processing device can be used comfortably without generating harsh sounds.
An object of the present invention is to provide a housing structure capable of easily separating materials even when the information processing apparatus is disposed of, paying attention to recycling for avoiding living environment pollution.

[0006]

Therefore, in the present invention,
In a housing structure of an information processing device in which a device serving as a noise source is mounted in a housing having a closed structure, the housing is provided with a resonance-type sound absorbing material so as to surround the device serving as a noise source on an inner wall portion thereof. , Characterized in that it is configured to suppress noise of the device to the outside of the housing.

[0007] In this case, the resonance type sound absorbing material is a plate-like body having a large number of through-holes with a constant distribution, and is mounted inside the housing in parallel to an inner wall surface, and It is preferable that they are made of exactly the same material. Further, the resonance type sound absorbing material is made of a metal or a plastic resin, and it is effective to increase the sound absorbing effect by setting the value so as to take a value close to the following resonance frequency f.

F = c / 4π · {[p / {L (t + 0.8d)}] c: sound velocity in air (m / s) t: plate thickness (m) p: aperture ratio (= πd ² / 4P ² ) P: Pitch of through-hole (m) L: Thickness of air layer (m) d: Diameter of through-hole (m) Therefore, a noise source such as a hard disk drive mounted inside the housing of the information processing device The noise generated during the operation of the (device) is absorbed by the function of the resonance type sound absorbing material. This makes it possible to block noise from the noise source generation source to the outside of the housing, or reduce the volume of the noise to the outside.

Further, if necessary, the same material as that of the housing of the information processing apparatus is used for the resonance type sound absorbing material 5, so that in addition to the above-described noise reduction effect, separation at the time of disposal in consideration of recycling can be performed. It is possible to make it easier.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
FIG. 1 shows a first embodiment of the present invention, in which an inner wall of a housing 1 of an information processing apparatus and an inner wall of a cover 2 for closing an opening of the housing 1 have a plate-like shape through a predetermined gap. A resonance type sound absorbing material 5 is attached. The resonance type sound absorbing material 5 is provided with a large number of through holes 6 with a uniform distribution, for example, at equal pitches. The resonance type sound absorbing material 5 is made of the same material as the housing 1 and the cover 2. For example, case 1
Metal (iron, aluminum, etc.) depending on the material of the cover 2
And plastic resins (resins such as ABS and PS). This is because the effect of the resonance type sound absorbing material 5 does not depend on its material, but its shape, for example, the resonance type sound absorbing material 5.
, The size and pitch of the through holes 6, and the distance (distance) from the housing 1 and the cover 2. That is, regardless of the material, the material of the sound absorbing material 5 is
If so, the effect of noise reduction is the same.

As shown in FIG. 3, the effect of the resonance type sound absorbing material 5 is that the sound absorption coefficient becomes maximum at the resonance frequency f represented by the following equation.

F = c / 4π · {[p / {L (t + 0.8d)}] c: sound velocity in air (m / s) t: plate thickness (m) p: aperture ratio (= πd ² / 4P ² ) P: Pitch of through hole (m) L: Thickness of air layer (m) d: Diameter of through hole (m) (Embodiment 2) FIG. 4 shows a second embodiment of the present invention. FIG. Here, the resonance type sound absorbing material 5 is arranged so as to surround only the noise generating source (device) 3 such as a hard disk drive, and other components (not shown) are installed in other parts in the housing 1. Is done. In this embodiment, similarly to the above-described embodiment, basically, the effect of noise reduction and the ease of disposal are exhibited, but the amount of use of the resonance type sound absorbing material 5 can be reduced. This increases the efficiency of recycling.

[0013]

According to the present invention, by using a resonance sound absorbing material, external leakage of vibration sound during operation of a device (vibration source) such as a magnetic recording medium assembly built in an information processing device can be suppressed. Therefore, even in use in a quiet environment such as a general home, no harsh sound is generated, and the information processing apparatus can be used with confidence. Moreover, at present, recycling is an important environmental issue.
Since the housing and the sound absorbing material are made of the same material, there is no need to separate them and the disposal becomes easy.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a housing showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is an enlarged view of a cross section of the resonance type sound absorbing material.

FIG. 4 is a diagram showing another embodiment of the present invention.

FIG. 5 is a diagram illustrating a conventional silent structure of the information processing apparatus.

[Explanation of symbols]

 Reference Signs List 1 housing (information processing device) 2 cover (information processing device) 3 noise generating source (device) 4 sound absorbing material (or sound insulating material) 5 resonance type sound absorbing material 6 through hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10K 11/16-11/175 H05K 5/00-5/06 G11B 33/08

Claims (3)

(57) [Claims] 1. A housing structure of an information processing apparatus in which a device serving as a noise source is mounted in a housing having a closed structure, wherein the housing has a resonance-type sound absorbing device so that an inner wall thereof surrounds the device serving as a noise source. A housing structure of the information processing apparatus, comprising a material and configured to suppress noise of the apparatus to the outside of the housing. 2. The resonance type sound absorbing material is a plate-like body provided with a large number of through-holes with a constant distribution, is mounted inside the housing in parallel to an inner wall surface, and is completely separated from the housing. 2. The method according to claim 1 , wherein the parts are made of the same material.
The housing structure of the information processing apparatus according to claim 1. Wherein the resonance type sound absorbing material is made of a metal or a plastic resin, to take a value close to the resonance frequency f below, Oh claim 1, characterized in that it is set
Or the housing structure of the information processing apparatus according to 2 . f = c / 4π · {[p / {L (t + 0.8d)}] c: sound velocity in air (m / s) t: plate thickness (m) p: aperture ratio (= πd ² / 4P ²⁾ ) P: Pitch of through hole (m) L: Thickness of air layer (m) d: Diameter of through hole (m)