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JPS64890

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DESCRIPTION JPS64890
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system for a television, which has a small box shape and improves low frequency
characteristics inexpensively. 2. Related Art In recent years, there has been a demand for a
speaker system that is small in size and intended to expand low frequency characteristics, and
in% K, a speaker system for incorporating in a television, small, thin, and low frequency
characteristics There is a demand for a speaker system that is intended to expand the Therefore,
as a means for solving the above-mentioned request, a system in which a speaker system of a bus
reflex system is incorporated on both sides of a television cabinet so as to improve the sound
quality of the television is generally used. Hereinafter, a conventional speaker system for
television using a bath reflex system will be described with reference to the drawings. Heretofore,
a speaker system for television in which the low frequency characteristic is expanded and the
sound quality is improved is generally configured as shown in FIG. In FIG. 4, 1 is a television
cathode-ray tube, 2 is a television cabinet, 3 is a speaker box installed on both sides of the
television cabinet 20, 5 is a speaker unit attached to the front side 4 of the speaker box 3, 6 is a
speaker box 3 It is a boat for low-range characteristic improvement attached to the front baffle
portion 4. The television speaker system configured as described above will be described below
with reference to the sound pressure frequency characteristic diagram shown in FIG. The sound
pressure frequency characteristics a (characteristics of the closed box) of the speaker box 3 to
which the speaker unit 5 is attached are mostly determined by the resonant frequency of the
speaker unit 6 and the volume of the speaker box 3, and here, the same speaker unit To expand
the low frequency characteristics with the same speaker box, the boat 6 is provided, and the
sound pressure frequency characteristics in the low frequency region are generated by the back
pressure of the speaker unit 5 and the hollow cylinder resonance caused by the inside of the
speaker box 3 and the boat 6 The sound pressure frequency characteristic shown in FIG. 6 is a
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characteristic of a general bass reflex type television speaker system whose low frequency
characteristic is improved by providing the boat 6. Problems to be Solved by the Invention When
such a conventional television speaker system is used, the reduction of the television cabinet
noise and the low-frequency characteristic of the television cabinet are reduced as compared
with the configuration in which the speaker unit is directly attached to the television cabinet. It is
possible to expand and improve the sound quality of the television, and considering the same
reproduction frequency, it is possible to generally miniaturize the speaker box to a volume of 1 /
C as compared with the closed box. .
However, in order to further expand low-pass characteristics, it is conceivable to set the
resonance frequency of the speaker unit low or increase the volume of the speaker box to reduce
the increase in resonance frequency of the speaker unit. In order to set the resonance frequency
lower, it is necessary to increase the mass of the vibration system, which causes a problem that
the sound pressure decreases, and to increase the volume of the speaker box means expanding
the shape of the speaker box and In general, in the case of the bass reflex type speaker system,
there is a problem that the bass feeling is improved but the localization feeling of the sound
image is deteriorated. The present invention solves such a problem, and it is an object of the
present invention to provide a low cost speaker system for a television in which low frequency
characteristics are expanded and sound image localization is improved with a small speaker box.
Means for Solving the Problem In order to solve this problem, the present invention relates to a
speaker unit, a first boat provided on a baffle plate of the speaker box mounted with the speaker
unit, and a box back opposite to the baffle plate. A speaker box comprising a second boat
provided on a face plate is provided on both sides of a television cabinet, and reflectors for
reflecting sound emitted from the second boat are provided on both sides of the television
cabinet. It was installed at the rear. According to this configuration, the back pressure of the
speaker unit causes the inside of the box and the first one. The low-pass characteristic can be
expanded by the hollow cylinder resonance generated in the second boat. Embodiment An
embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a
front view showing the configuration of a television speaker system according to an embodiment
of the present invention, and FIG. 2 is a perspective view showing the configuration of the
television speaker system according to the present invention shown in FIG. is there. In FIG. 1, 7 is
a speaker box, 8 is a baffle plate in which the speaker unit 5 is attached to the front of the
speaker box 7, and 9 is a first boat provided on the baffle plate. In FIG. 2, 1 o is a second boat
provided on the box back plate opposite to the baffle plate 8, 11 is a reflector installed at the rear
of the second boat 10 of the speaker box 7. Is a structure that can freely change the angle like C.
Further, the two port shapes are configured such that the hollow cylinder resonant frequencies of
the first boat 9 and the second boat 1 o are different.
The operation of the speaker system for television according to the present invention in which
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the speaker system configured as described above is installed on both sides of the television
cabinet 2 as shown in FIG. 1 will be described below. As shown in FIG. 2, the sound pressure
frequency characteristic f1 (the characteristic when the reflecting plate 11 is moved in the
direction of FIG. 2 C1) of the speaker system for television of the present invention is an empty
cylinder of the first and second ports. It is obtained by combining two low frequency
characteristics determined by resonance, and the low frequency characteristics are expanded
compared to the sound pressure frequency characteristics of a conventional television speaker
system using the bass reflex system with the same volume. In the case of the speaker system for
a television according to the present invention when the reflector 11 is set in the direction of FIG.
2, the sound d emitted from the front of the speaker system and the speaker from the second
port 10 The sound pressure frequency characteristic is low frequency band as shown in FIG. 3 f
2, which is obtained by combining the sound e emitted to the back of the system and to the front
by the blowing efficiency of the reflector. Expansion in which it is further possible. Effects of the
Invention As described above, according to the present invention, the speaker unit, the first port
provided on the baffle plate of the speaker box to which the speaker unit is attached, and the
second port provided on the box back plate opposite to the baffle plate A speaker box composed
of the following ports is installed on both sides of the TV cabinet, and reflectors that reflect the
sound emitted from the second port are installed on the back of the speaker box installed on both
sides of the TV cabinet Therefore, the low frequency characteristics can be expanded by making
the hollow resonance occurring in two ports different from each other, and further, only the low
frequency band radiated from the second port by providing the reflection plate Since the light is
emitted to the front by the blowing efficiency of the reflector, the low-pass characteristics can be
further expanded. In addition, if the angle of the reflector is freely changed, it is possible to freely
set the feeling of expansion of the bass and the feeling of volume of the bass, and it is an
inexpensive and small-sized speaker system for a television, which is The effect of being able to
reproduce a certain rich bass without disturbing the sense of sound image localization in the
middle to high range can be obtained.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a front view showing the configuration of a television speaker system according to an
embodiment of the present invention, FIG. 2 is a perspective view showing the configuration of
the television speaker system according to the present invention shown in FIG. The figure is a
sound pressure frequency characteristic diagram of the speaker system for television of the
present invention, FIG. 4 is a perspective view showing the configuration of the speaker system
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for television using the conventional bus reflex system, and FIG. 5 is shown in FIG. It is a sound
pressure frequency-characteristics figure of the conventional speaker system for television.
1 ········ Television CRT, 2 ······· Television cabinet, 5 ······· Speaker unit, 7 ······ Speaker box, 8 ······
Baffle plate, 9 ··· First port, 1 o ······· Second port, 11 ············ Reflector. Name of agent Attorney
Nakao Toshio and other 1 base box 1 Fig. 7--One board, Ges 8-Bar 7 full version 9-One first TXo
Fig. 2- One second ao E-door /-one and tJT 廠 Fig. 3 MA 歌 song Fig. 4! Fig. 5 M number
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