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JPH06205489

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DESCRIPTION JPH06205489
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker apparatus incorporated in a television receiver or the like, and more particularly to a
speaker apparatus capable of satisfactorily reproducing deep bass.
[0002]
2. Description of the Related Art In recent years, in television broadcasting, high-quality audio
such as PCM audio by audio multiplex broadcasting and satellite broadcasting and PCM audio by
high-vision broadcasting has come to be enjoyed. Further, with the spread of video disk players
and video tape recorders as packaged media, the spur for higher sound quality is becoming
stronger.
[0003]
Along with this, in order to cope with this, there is a demand for a television receiver equipped
with a speaker system capable of reproducing a much wider range of audio and reproducing
more powerful audio. .
[0004]
By the way, if it is going to constitute the above-mentioned speaker system, although a big
speaker apparatus should just be carried, if it is carried in a common television receiver, if a big
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speaker apparatus is carried, it will be the same as that of a television receiver. The enlargement
is inevitable.
[0005]
Therefore, when built into a television receiver, the space taken up by the speaker device is a big
problem, and a speaker device that does not take up a space without losing the sound quality has
become a big technical problem.
[0006]
In order to solve this, for example, National Technical Report Vol. A speaker system as described
on pages 76 to 82 of the October 1988 issue has been proposed.
[0007]
This configuration comprises an acoustic tube having an opening for emitting sound in the front
of the speaker unit, and a rear cabinet provided with a baffle port on the rear.
Therefore, the front has an improved sound pressure characteristic by the sound tube, and the
volume of the rear cabinet enables the enhancement of the deep bass.
[0008]
Furthermore, by forming the opening of the sound tube emitting the sound vertically and
longitudinally, it can be disposed on the side of the CRT (cathode ray tube), and the width of the
television receiver can be prevented from widening. It is also a structure which can incorporate a
big speaker in a television receiver by arrange | positioning a speaker using space.
[0009]
However, since the printed circuit board is usually disposed at the lower part in the neck
direction of the CRT, and the above-described speaker system is configured in a box shape, the
portion where the loudspeakers are arranged is naturally limited with respect to the space in the
neck direction. Therefore, the rear part of the television receiver can not but become larger in the
lateral direction.
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[0010]
On the other hand, in order to reduce space further by aiming for further miniaturization, if the
volume of the back cabinet is reduced and the vertical length of the acoustic tube is shortened to
reduce the space, high sound quality, which is the original purpose, is achieved. It can not be
done.
That is, shortening the vertical length of the acoustic tube causes a reduction in sound pressure,
and a reduction in the capacity of the rear cabinet causes a problem that emphasis on deep bass
is weakened.
[0011]
On the other hand, in the case of this conventional speaker system, since a full range speaker is
used as the speaker, the frequency band from 50 Hz to 90 Hz, which is a deep bass region, can
not be reproduced sufficiently.
In order to reproduce this, it is necessary to approximately double the capacity of the rear
cabinet.
(It is necessary to increase the current capacity from 5.2 liters to about 10 liters). This causes the
speaker system on the side of the CRT neck to become large, causing a problem that the back
cabinet of the television receiver becomes large. There is a drawback that the receiver becomes
large in size.
[0012]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present
invention reduces the occupied area of the speaker device in the cabinet of the television
receiver, and flattens from the deep bass region to the high region. It is an object of the present
invention to propose a speaker device capable of obtaining various frequency characteristics.
[0013]
SUMMARY OF THE INVENTION According to the present invention, the tip opening portion is
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formed so that the cross-sectional area is smaller than the full range speaker output side in order
to output the full range speaker and the sound reproduced from the full range speaker. A first
acoustic tube, a loudspeaker for deep bass, a resonance chamber for resonating a sound
reproduced from the loudspeaker for deep bass, and a reproduction output from a resonance
chamber provided above the first acoustic tube And a second sound tube for emitting the light to
the outside.
[0014]
Further, according to the present invention, there is provided a first full-range speaker and a first
acoustic tube whose tip opening is smaller in cross-sectional area than the full-range speaker
output side for outputting sound reproduced from the full-range speaker. A speaker for deep
bass, a resonance chamber for resonating a sound reproduced from the loudspeaker for heavy
bass, and a unit for emitting the reproduction output from the resonance chamber provided
above the first acoustic tube to the outside The present invention is also a television receiver
characterized by comprising a speaker device comprising a second sound tube.
[0015]
According to the present invention, by adopting the above-described configuration, a low-pitched
sound tube outputting the low-pitched sound region is integrally provided above the sound tube
outputting the full-range speaker, and the low-pitched sound tube is interposed. Low tone
generation It is made to output the low tone from the resonance room.
[0016]
An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of the present invention, in which 1 is an acoustic tube, a first
acoustic tube 2 for emitting an output of a full range speaker 31 and a second for emitting an
output from a deep bass speaker 32 The sound tube 3 comprises an input hole 4 for inputting
the output of the deep bass speaker 32 to the second sound tube 3 and a mounting hole 5 for
mounting the full range speaker 31.
[0017]
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The opening 2a of the acoustic tube 1 is configured to be long in the vertical direction and
narrow in width, and the acoustic tube 2b on the side where the full-range speaker 31 is
disposed is wider, and the opening 2a is in the direction of the opening 2a. It is formed to be
narrow in width.
Furthermore, the depth of the acoustic tube 1 is increased because a speaker for reproducing to
deep bass and a normal full-range speaker 31 that does not require frequency characteristics (for
example, a speaker capable of obtaining the characteristics as shown in 21 of FIG. 5) are used. It
may be shorter than before.
[0018]
Reference numeral 6 denotes a resonance box constituting a resonance chamber for generating a
deep bass output, which is fitted to the input hole 4 of the second acoustic tube 3 and is an
output aperture for outputting the deep bass output to the second acoustic tube 3 And a
mounting portion 8 for mounting the deep bass speaker 32.
[0019]
Then, as shown in FIG. 2, the deep bass speaker 32 is attached to the inside of the resonance box
6.
[0020]
By the way, in the frequency range reproduced by the full-range speaker 31 described above, a
sufficient deep bass area is not reproduced.
Therefore, this resonance box 6 has a frequency characteristic that can reproduce only the 50 Hz
to 90 Hz deep bass region (see the frequency characteristic 22 in FIG. 5).
[0021]
For that purpose, the capacity of the resonance box 6 is set as follows.
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If the shape of the box is taken, the capacity of the box can be set as follows according to the
principle of the Helmholtz resonator.
[0022]
That is, if the volume is 3,5 liters, desired frequency characteristics can be obtained.
The lower bass region can be reproduced with a smaller capacity than that of the speaker system
shown in the prior art.
[0023]
Therefore, both the acoustic tube 1 and the resonance box 6 can be miniaturized as compared
with the conventional speaker system, and furthermore, each structure can be configured as a
single body.
[0024]
Next, the case where the present invention is installed in a television receiver will be described.
In FIG. 3, reference numeral 9 denotes a CRT, and the acoustic tube 1 is disposed on both sides
of the CRT 9.
The acoustic tube 1 is disposed so that the full range opening 2a and the deep bass opening 3a
are on the tube surface side of the CRT 9, and the sound from the full range opening 2a and the
deep bass opening 3a is a television receiver To be released in front of the
[0025]
On the other hand, the resonance box 6 that generates a deep bass is attached to either the left
or right acoustic tube 1, and the deep bass is emitted from the deep bass opening 3 a of the
acoustic tube 1.
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It should be noted that since the sound in the deep bass range is not directional, either the left or
the right may be sufficient to generate the deep bass, so that only one resonance box 6 may be
attached.
[0026]
The side view mounted in this way is shown in FIG.
As can be seen from this figure, the depth of the acoustic tube 1 is short, and the resonance box
6 for deep bass is mounted on the upper portion of the acoustic tube 1.
[0027]
The acoustic tube 1 and the resonance box 6 are fixed by screws or the like so as not to fall
inside the television receiver, and are also fixed by screws or the like to the cabinet of the
television receiver.
[0028]
As a result, as shown in FIG. 8, only one of the acoustic tubes 1 is disposed, and the acoustic tube
1 and the resonance box 6 are disposed on the other, but as described above, the resonance box
6 is at the top Since it is attached, a space is secured at the lower portion thereof, so that a wider
space can be secured at the left and right lower portions on the neck side of the CRT 9 as
compared with the prior art.
[0029]
Next, another embodiment is shown in FIG.
FIG. 4 shows another embodiment of the acoustic tube 1 by shortening the space between the
input hole 11 of the second acoustic tube 3 for inputting the reproduction output from the
resonance box 6 and the deep bass opening 3a. As shown in FIG. 7, the resonance box 6 can be
placed on the upper portion 10 of the acoustic tube 1.
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[0030]
Furthermore, since the resonance box 6 is disposed in the front direction of the television
receiver, more space can be taken.
[0031]
Further, in the present invention, although it was configured to enable reproduction for heavy
bass using the resonance box for heavy bass 6, stereo reproduction can also be performed by
arranging the acoustic tubes 1 left and right without attaching the resonance box. This makes it
possible to easily remove the resonance box according to the model of the television receiver,
and the variation of the model becomes wide.
[0032]
As described above, according to the present invention, a speaker system which does not take up
a space is provided by arranging a resonance box for generating deep bass on the upper part of
an acoustic tube for emitting a full range speaker output. Further, since it is possible to obtain
flat frequency characteristics from the deep bass region to the mid and high tone regions, highquality sound can be reproduced.
[0033]
Further, since the speaker system achieves space saving, the space inside the cabinet can be
widely used even if it is arranged inside the cabinet of the television receiver, and the layout of
the printed circuit board and the chassis can be designed with a margin.
[0034]
Furthermore, since the space at the neck portion of the CRT can be increased, the back cabinet of
the television receiver can be made smaller, and the size and weight of the television receiver can
be reduced.
[0035]
Brief description of the drawings
[0036]
1 is a diagram showing an embodiment of the speaker apparatus of the present invention.
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[0037]
2 is a perspective view of the deep bass resonance box of the present invention.
[0038]
3 is a perspective view showing a state in which the speaker device of the present invention is
incorporated in a television receiver.
[0039]
4 is a diagram showing another embodiment of the speaker device of the present invention.
[0040]
5 is a diagram showing the frequency characteristics of the speaker device of the present
invention.
[0041]
6 is a side view of the speaker device of the present invention.
[0042]
7 is a side view of another embodiment of the speaker device of the present invention.
[0043]
FIG. 8 is a view of the state in which the speaker device of the present invention is built in a
television receiver, viewed from above.
[0044]
Explanation of sign
[0045]
Reference Signs List 1 acoustic tube 2 first acoustic tube 2a full range opening 3 second acoustic
tube 3a deep bass opening 6 resonance box 31 full range loudspeaker 32 deep bass loudspeaker
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