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JP3171151

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DESCRIPTION JP3171151
Abstract: To provide an audio device for a portable terminal mounted on a portable terminal to
improve the sound of a built-in speaker. SOLUTION: The rear side speaker opening 3 of the rear
side built-in speaker 2 built in the rear side of the portable terminal 1 or the side side speaker
opening 5 of the side built-in speaker 4 built in the side of the portable terminal 1 is covered.
Since the sound emitted from the built-in speaker passes through the internal cavity and comes
out from the front, the diffusion of the sound can be prevented, and the sound of the portable
terminal 1 can be improved. [Selected figure] Figure 2
Acoustic device for portable terminal
[0001]
The present invention relates to an audio device for a portable terminal that improves the sound
of the portable terminal.
[0002]
Portable terminals with built-in speaker openings on the back or side have less sound spreading
towards the front, which leads to poorer sound quality and loudness, making them difficult to
hear.
[0003]
As disclosed in Patent Document 1, there has been proposed an expanded acoustic box for a
portable personal computer which improves the sound quality by incorporating the sound of the
bass reflex port of the portable personal computer.
02-05-2019
1
[0004]
Unexamined-Japanese-Patent No. 2000-50377
[0005]
The range to be improved by the proposal of Patent Document 1 is the low range, and the sound
of the middle to high range directly listens to the sound of the speaker facing the front.
[0006]
An object of the present invention is to provide an audio device for a portable terminal in which
the opening of the built-in speaker prevents the diffusion of the sound generated from the
portable terminal on the back or the side, and improves the sound quality and the volume
reduction inexpensively. Do.
[0007]
In order to achieve the above object, according to the invention of claim 1, the built-in speaker is
mounted so as to cover the rear side speaker opening or the side side speaker opening of the
portable terminal, and the cavity formed between the portable terminal and the portable
terminal. It is characterized in that the emitted sound is guided in the direction of the outlet, and
the outlet of the sound is directed to the front.
[0008]
The invention according to claim 2 is characterized in that it is mounted on a portable terminal
having a rear speaker opening, and the internal cavity is partitioned by a partition plate.
[0009]
The invention according to claim 3 is characterized in that it is mounted on a portable terminal
having a side speaker opening and the internal cavity is partitioned by a partition plate.
[0010]
According to the invention of claim 1, the sound of the built-in speaker passes through the cavity
formed between the acoustic device for the portable terminal and the portable terminal and is
not diffused but comes out from the front of the portable terminal, thereby preventing the
volume reduction. It is possible to output high-pitched sound with a high directivity, which also
02-05-2019
2
improves the sound quality.
[0011]
According to the second aspect of the present invention, the back hollow is formed by dividing
the internal cavity in a step-by-step manner by the partition plate, thereby enhancing the bass
range.
[0012]
According to the invention of claim 3, the internal cavity is divided by the partition plate in the
longitudinal direction to form a bass reflex type, thereby enhancing the bass range.
[0013]
Embodiment 1 FIG. 1 is a perspective view of a mobile terminal acoustic device according to
Embodiment 1 of the present invention.
As shown in FIG. 1, since the shape is curved inward, when it is mounted on the portable terminal
1, a cavity is formed between the portable terminal 1 and the acoustic device for the portable
terminal, and the sound of the built-in speaker is It comes out from the exit which turned to the
front of the portable terminal 1 through the cavity.
[0014]
FIG. 2 is a side view of Embodiment 1 of the present invention attached to a portable terminal 1.
It is mounted so as to cover the rear side speaker opening 3 of the rear side built-in speaker 2
built in the portable terminal 1 or the side side speaker opening 5 of the side side built-in
speaker 4 and the sound of the rear side built-in speaker 2 or side side built-in speaker 4 Since it
comes out to the front through the cavity formed between the portable terminal 1 and the
portable terminal 1, it is possible to prevent the diffusion of sound and to improve the
deterioration of the sound volume of the volume and the high frequency range.
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3
[0015]
Second Embodiment FIG. 3 is a perspective view of a mobile terminal acoustic device according
to a second embodiment of the present invention.
A back load horn is formed by dividing the internal cavity by a plurality of (for example, five)
partition plates 7, and the sound entering from the sound intake 6 of the speaker is enhanced in
the low range and comes out from the sound outlet 8 .
[0016]
FIG. 4 is a cross-sectional view of a second embodiment of the present invention.
The sound that has entered from the sound intake 6 of the speaker passes through the space
divided in the hollow by the partition plate 7 and exits from the sound outlet 8, but since the
partition plate 7 forms a back load horn, It is enhancing the low range.
[0017]
Third Embodiment FIG. 5 is a perspective view of a mobile terminal acoustic device according to
a third embodiment of the present invention.
By dividing the internal cavity in the longitudinal direction by the partition plate 10, a bass reflex
type is formed, and the bass range is enhanced to emit sound from the sound outlet 8.
[0018]
FIG. 6 is a cross-sectional view of a third embodiment of the present invention.
The sound that enters from the sound intake 9 of the speaker passes between the partition plates
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4
10 that divide the inside of the cavity in the longitudinal direction, and the sound comes out from
the sound outlet 11, but the diaphragm 10 forms a bass reflex type. , The enhancement of the
bass range.
[0019]
FIG. 1 is a perspective view of a first embodiment of the present invention.
FIG. 1 is a side view of a first embodiment of the present invention attached to a portable
terminal.
FIG. 5 is a perspective view of a second embodiment of the present invention.
It is XX arrow sectional drawing in FIG.
FIG. 5 is a perspective view of a third embodiment of the present invention.
It is YY arrow sectional drawing in FIG.
[0020]
DESCRIPTION OF SYMBOLS 1 mobile terminal 2 back built-in speaker 3 back speaker opening 4
side built-in speaker 5 side speaker opening 6 speaker sound intake 7 partition 8 sound outlet 9
speaker sound intake 10 partition 11 sound outlet
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