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JPH0394598

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DESCRIPTION JPH0394598
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker apparatus in which an acoustic tube for guiding a sound wave is disposed on the front of
the speaker. The prior art method of providing a horn or an acoustic tube on the front face of a
speaker and guiding the sound wave generated from the speaker to the opening provides a
greater output sound pressure than in the case where the horn or the acoustic tube is not used.
There are advantages such as the sound being transmitted in the direction of, and is often used
conventionally. Hereinafter, a speaker device using a conventional acoustic tube will be described
with reference to the drawings. FIG. 3 is a structural conceptual view of a television set
incorporating the above speaker device. In FIG. 3, 1 is a speaker, 2 is an acoustic tube to which
the speaker 1 is attached, 3 is a television cabinet, and 4 is a cathode ray tube. First, the
operation of the television set incorporating the speaker device using the acoustic tube 2
configured as described above will be described. As shown in FIG. 3, a speaker device in which an
acoustic tube 2 for guiding a sound wave to the front of the speaker 1 is disposed along the
cathode ray tube 4 inside the television set and further incorporates the television cabinet 3
along the speaker device. By adopting this structure, it is possible to miniaturize the television
set. FIG. 4 is a structural conceptual view showing the configuration of the conventional speaker
device. In FIG. 4, 5 is an acoustic lens provided on the front of the speaker 1, 7 is a hole for
guiding the sound wave emitted from the speaker 1 to the acoustic tube 2, and 6 is a reflection
provided on both sides of the hole 7. A plate 9 is a sound absorbing material, and the acoustic
tube 2 is a combination of an acoustic tube panel 8 constituting most of the acoustic tube and an
acoustic tube cover 10 in the direction of A. The operation of the loudspeaker apparatus which is
disciplined as described above will be described below. The acoustic lens 5 and the reflection
plate 6 provided on the front surface of the speaker 1 are for improving the high frequency
characteristics of the speaker device, and the sound absorbing material 9 inserted on both sides
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of the reflection plate 6 is inside the acoustic tube 2. It is for suppressing the standing wave
which generate ¦ occur ¦ produces. The acoustic tube 2 is regulated so that the area at the front
of the speaker is small and the area is larger as it approaches the opening. The configuration will
be described with reference to FIGS. 5 to 7. 5 shows a B-B sectional view of FIG. 4, FIG. 6 shows a
C-C sectional view of FIG. 4, and FIG. 7 shows a D-D sectional view of FIG. The configuration of
the acoustic tube 2 is as shown in FIG. 5 to FIG. 7. In FIG. 5, the sound guiding portion is
structured to form a substantially uniform space from the front surface portion of the speaker to
the opening portion. The speaker mounting side as the insertion portion of the sound absorbing
material 9 is arranged to have a large space.
Further, in FIG. 7, the acoustic part is configured to become gradually larger from the front face
of the speaker to the opening. SUMMARY OF THE INVENTION However, in the above-described
conventional configuration, since the structure of each part inside the acoustic tube constituting
the acoustic tube 2 is complicated, the acoustic tube 2 is integrally formed by means such as
integral molding. However, as shown in FIG. 4, the acoustic tube panel 8 and the acoustic tube
cover 10 had to be divided into two parts. However, in order to attach the acoustic tube cover 10,
it is necessary to join in such a way as to have sufficient strength in consideration of the internal
resonance of the acoustic tube 2 and the like. Therefore, there existed a problem that
manufacturing cost increased. SUMMARY OF THE INVENTION The present invention solves the
above-mentioned conventional problems, and provides a speaker device capable of improving
productivity by arranging an acoustic tube having a complicated structure to be integrally
formed. With the goal. Means for Solving the Problem In order to solve the problem, the speaker
device of the present invention has an acoustic tube for guiding a sound wave having a
rectangular opening at the front of the speaker, and the inside of the acoustic tube is at the front
of the speaker A reflection plate and an acoustic lens are arranged, and the sound conduction of
the sound wave emitted from the speaker is configured so that the area is small at the front of
the speaker and the area becomes larger as the opening is approached. In order to enable
integral molding, the middle of the acoustic tube is divided into two blocks, and in order to
facilitate assembly of the acoustic tube, one side of the rectangular shape forming the acoustic
tube has a side-wiring structure. Have a discipline that makes With this configuration, in
consideration of incorporation into the device, even in a speaker device having a horn and an
acoustic tube whose opening is a long and narrow rectangular shape, a reflector and an acoustic
lens that constitute the interior of the acoustic tube in front of the speaker are disposed. In
addition, by making the sound tube into a structure capable of integral reed, the productivity of
the sound tube can be improved. Embodiment An embodiment of the present invention will be
described with reference to the drawings. The same reference numerals as those in FIGS. 3 to 7
denote the same parts. FIG. 1 is a perspective view showing the structure of an acoustic pipe
portion in an embodiment of the present invention. In FIG. 1, 11 is a block of an acoustic tube of
the first eye composed of an acoustic lens 5, a hole 7, a reflector 6 and the like, and 12 is a
rectangular shape constituting the block 11 of the first acoustic tube. The second acoustic tube
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block provided via the folding structure 13 provided on one side surface in the long side
direction is formed by molding a synthetic resin.
The operation of the acoustic tube of the present invention configured as described above will be
described using FIG. 1 and FIG. FIG. 2 is a perspective view showing a configuration of a speaker
apparatus using an acoustic pipe portion according to an embodiment of the present invention
shown in FIG. 1 using a partial cross-sectional view. In the speaker device using the acoustic tube
portion of the present invention, the sound absorbing material 9 is inserted on both sides inside
the acoustic tube, the sound conduction of the sound wave radiated from the speaker 1 is small
in the front portion of the speaker 1 and the opening portion The area is made larger as it
approaches. After the sound absorbing material 9 is inserted, the second acoustic pipe block 12
is bent in the direction of arrow E in FIG. 1 with the hinge portion 13 as a fulcrum and combined
with the first acoustic pipe block 11. Then, the assembly tube 16 can be easily assembled by
fastening the assembly screw 16 to the screw mounting boss 14 through the screw insertion hole
15 in the direction of the break 41 [F. Reference numeral 17 denotes a combination of the first
and second blocks of the acoustic tube, which is assembled via an adhesive or a shock absorbing
material for preventing the occurrence of flickering due to internal resonance or the like of the
acoustic tube. As a result, the speaker device becomes more reliable as an acoustic tube. Thus,
the loudspeaker apparatus of the present invention divides the acoustic tube into two blocks 11
and 12 through the hinge portion 13 so that the arrow G.1 in FIG. If the mold is divided in the
direction of 8.1, integral molding becomes possible, and it becomes possible to provide a
structure having sufficient strength against internal resonance of the acoustic tube, etc. It is
possible to realize the improvement of the property and the drastic reduction of the number of
assembling steps. As described above, by incorporating the speaker device having the acoustic
tube structure according to the present invention into a television set, it is possible to easily
realize a small and slim television set and realize a highly reliable television set. It will be As
described above, according to the present invention, an acoustic tube for guiding a sound wave
having a rectangular opening is disposed on the front of the speaker, and a reflector and an
acoustic lens are disposed on the inside of the acoustic tube on the front of the loudspeaker. The
structure in which the sound conduction of the sound wave radiated from the speaker is
configured so that the area is smaller at the front of the speaker and the area is larger as the
opening is approached, and the acoustic tube can be integrally formed, By dividing the middle of
the acoustic tube into two blocks and forming the acoustic tube so that assembly of the acoustic
tube is easy, one side of the long side of the rectangular shape constituting the acoustic tube is
configured to have a winding structure. As a result, it is possible to arrange the acoustic tube into
two blocks to form an integral structure, so that the assembly of the acoustic tube is easy. Are
those made possible to improve the assembling workability and significant reduction of assembly
man-hours can be realized, in which can realize an excellent speaker system more reliable as an
acoustic tube.
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[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view showing the structure of an acoustic tube portion of a speaker device
according to an embodiment of the present invention, and FIG. 2 is a speaker device using an
acoustic tube portion according to an embodiment of the present invention shown in FIG. Fig. 3
is a structural conceptual view of a television set incorporating a speaker device using a
conventional acoustic tube, and Fig. 4 is a structural conceptual diagram of a speaker device
using a conventional acoustic pipe. 5 is a cross-sectional view taken along the line B-B in FIG. 4,
FIG. 6 is a cross-sectional view taken along the line C-C in FIG. 4, and FIG. 7 is a cross-sectional
view taken along the line D-D in FIG.
5 ········ Acoustic lens, 6 ·················································· First block of the acoustic tube, 12 ··· ... second
block constituting the acoustic tube, 13 ...... hinge portion, 14 ...... bis mounting boss 15 ...... screw
insertion hole, 16 ... ... · · · · · · · · · · · · · · · · · · · · · · · · · · · combination of the first and second acoustic
tube block.
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