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JPH06326948

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DESCRIPTION JPH06326948
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker apparatus for use in video equipment such as a television receiver and in-vehicle audio
apparatus.
[0002]
2. Description of the Related Art A typical example of a conventional speaker apparatus using an
acoustic tube will be described with reference to the drawings. FIG. 6 is a partially cutaway
perspective view showing the configuration of the conventional device built-in type speaker
device from the direction of the opening. In FIG. 6, 11 is an elongated rectangular shaped
opening 12 in consideration of installation in the device. The opening face of the speaker unit,
and 13 is an acoustic tube for guiding a sound wave having an opening 11.
[0003]
FIG. 7 is a partially cutaway perspective view showing the speaker apparatus mounted on a
television receiver. In FIG. 7, 16 is a cathode ray tube, 17 is a cabinet of the television receiver,
and 18 is the speaker apparatus. The speaker device 18 is disposed on both sides of the
television receiver so as to be sandwiched between the cathode ray tube 16 and the cabinet 17.
[0004]
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1
An electrical input is applied to the speaker device 18 in the television receiver configured as
described above to perform sound reproduction.
[0005]
However, in the above-described conventional configuration, a standing wave is generated inside
the acoustic tube 13 at the time of sound reproduction, and the reproduction frequency
characteristic is large in peak and dip, which is not necessarily satisfactory. I had a problem.
[0006]
The present invention solves the above-mentioned conventional problems, prevents the
occurrence of standing waves inside the acoustic tube that can not be prevented by the
conventional speaker device configuration, and realizes the reproduction frequency
characteristics with less peak dip. It is an object of the present invention to provide a speaker
device that can be used.
[0007]
SUMMARY OF THE INVENTION In order to solve this problem, a speaker device according to the
present invention comprises an acoustic tube coupled to the front of the speaker for guiding a
sound wave having a rectangular shape with an elongated opening, and the acoustic tube A
plurality of ribs are provided in the interior at equal intervals in the acoustic pipe from the
opening surface of the speaker toward the opening of the acoustic pipe, and the height of the
ribs is greater than the center of the opening surface of the speaker It is configured to be
functionally higher in the direction and to be continuously lower from the opening surface of the
speaker toward the opening of the acoustic tube.
[0008]
[Operation] With this configuration, the effect of the ribs provided inside the acoustic tube can
prevent the occurrence of standing waves inside the acoustic tube that could not be prevented by
the conventional speaker device, and the reproduction frequency characteristics with less peak
dip Thus, when the speaker device is built in a television receiver, sound reproduction close to
ideal can be made possible.
[0009]
An embodiment of the present invention will be described below with reference to the drawings.
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2
[0010]
FIG. 1 is a perspective view showing the configuration of the speaker device in the embodiment
from the direction of the opening. In FIG. 1, 1 is an opening having a long and narrow
rectangular shape in consideration of installation in a device, and 2 is an opening surface of the
speaker unit Reference numeral 3 denotes an acoustic tube for guiding a sound wave having an
opening 1. Reference numeral 4 denotes a rib installed inside the acoustic tube 3 from the
opening surface 2 of the speaker unit toward the opening 1. The opening surface 2 of the
speaker unit is an acoustic It is set as the structure located on the opposite side to the opening
part 1 with respect to the pipe | tube 3. As shown in FIG.
[0011]
FIG. 2 is a partially cutaway perspective view showing the speaker apparatus mounted in a
television receiver. In FIG. 2, 5 is the speaker apparatus according to the present invention, 6 is a
cathode ray tube, and 7 is a television receiver. The speaker device 5 is a cabinet, and is disposed
on both sides of the television receiver so as to be sandwiched between the cathode ray tube 6
and the cabinet 7 so as to share the side of the cabinet 7.
[0012]
FIG. 3 is an enlarged view of the opening 1 of the speaker device 5 of the present invention
shown in FIG. 1. In FIG. 3, the rib 4 is at a position evenly distributing the inside of the acoustic
tube 3 and of the opening face 2 of the speaker unit. They are arranged so that their height is
higher than the center line.
[0013]
FIG. 4 is a cross-sectional view of the speaker device 5 of the present invention shown in FIG. 1
as viewed from position A-A. In FIG.
Further, the rib 4 is configured such that the height from the inner surface of the acoustic tube 3
is continuously lower than the opening surface 2 of the speaker unit 8 toward the opening 1.
[0014]
The reproduction frequency characteristics of the speaker device 5 of the present invention and
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the conventional speaker device 18 configured as described above are shown in comparison with
FIG. 5, and in FIG. 10 shows the reproduction frequency characteristic of the conventional
speaker device 18.
As can be seen from FIG. 5, it can be seen that the reproduction frequency characteristic 9 of the
speaker device 5 of the present invention provides a significant improvement effect with no peak
and dip compared to the reproduction frequency characteristic 10 of the conventional speaker
device 18.
[0015]
In the present embodiment, the speaker apparatus having a configuration in which the side
surface of one side of the acoustic tube 3 is shared with the side surface of the cabinet 7 of the
television receiver is used as an embodiment. It is needless to say that the same effect can be
obtained even in the case of the configuration having.
[0016]
As described above, in the loudspeaker apparatus according to the present invention, the height
is functionally increased outward from the center line of the opening surface of the loudspeaker
unit at a position evenly distributed within the acoustic pipe in the loudspeaker apparatus. In
addition, by providing a rib formed so that the height from the inner surface of the acoustic tube
is continuously lower than the opening surface of the speaker unit toward the opening of the
speaker device, reproduction frequency characteristics with less peak dip can be obtained. It is
possible to realize a speaker device having the following. When this speaker device is
incorporated in a television receiver, sound reproduction close to an ideal can be achieved.
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