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JPH01135291

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DESCRIPTION JPH01135291
[0001]
Industrial Application Field 2 ?-The present invention relates to a speaker used as an acoustic
output device, and more particularly to a speaker having a novel driving method. In order to
improve the bass reproduction capability of the prior art speaker system, there is a method of
adding one more bass reproduction speaker in addition to the two-speaker system for
reproduction. This is often called 3D method. Hereinafter, a conventional 3D speaker system will
be described with reference to the drawings. FIG. 4 shows the connection method of the 3D
system. In FIG. 4, 1a to 1C are cabinets, 21L to 2b are mid-tone speakers, 3a to 3b are high-pitch
speakers, 4 is a bass speaker, 5a to 6C are supply cords for audio signal current, and 6 to 7 are
amplifiers It is. The operation of the speaker system configured as described above will be
described below. A signal from a sound source such as a recording tape or a player (not shown)
is amplified by an amplifier 6.7. The amplifier 3 is an amplifier for stereo reproduction and has a
2-channel amplifier. The signals amplified by the amplifier 6 are applied to the left and right
speakers through the supply cords 5a-5b. Furthermore, in order to improve the bass
reproduction capability, the signal amplified by the amplifier 7 is applied to the bass speaker 4
through the supply cord 5C. The middle and high-pitched sound greatly contributes to the sound
image localization at the time of stereo reproduction, but the left and right two speaker systems
are used, but the bass has less sense of direction, and as shown in FIG. Scheme is used.
SUMMARY OF THE INVENTION However, in the above configuration, although the bass speaker
system is newly used to improve the bass reproduction capability, an amplifier for supplying a
signal to the bass speaker system is used. Because of the need for 7, it was not possible to
reproduce using only the conventional stereo reproduction amplifier. SUMMARY OF THE
INVENTION In view of the above-described problems, the present invention provides a speaker
that can reproduce bass using a conventional amplifier without using a dedicated loudspeaker
system or the like while newly using a loudspeaker system for bass reproduction. Means for
01-05-2019
1
Solving the Problem In order to solve the above-mentioned problems, the speaker system for
reproducing low-pitched sound according to the present invention drives a plurality of driving
devices fixed to one diaphragm and these driving devices independently of each other. In order
to do so, the cabinet has a plurality of input terminals independently provided. In the present
invention, according to the above configuration, first, the audio signals of the left and right
channels output from the conventional stereo reproduction ? amplifier are respectively input to
the left and right mid-high range speakers and provided to the bass reproduction speakers 2
Input to one input terminal.
The audio signals input to the input terminals drive a plurality of drive devices corresponding to
the respective input terminals, and vibrate one diaphragm to which these drive devices are fixed.
Therefore, the 3D system can be realized without the need for an amplifier or the like dedicated
to a bass reproduction speaker as in the prior art. Sixth Embodiment A loudspeaker system
according to an embodiment of the present invention will be described below with reference to
the drawings. FIG. 1 is a structural cross-sectional view of a bass loudspeaker of a loudspeaker
system according to a first embodiment of the present invention. In FIG. 1, 1C is a cabinet, 10 is a
diaphragm, 11 is a frame, 12 is a damper, 13 is a voice coil, 14 is a magnetic circuit, 16a to 1eb
are input terminals, and 152L to 15b are voice coils and input terminals. It is a lead wire. Next,
the operation will be described. First, the voice coil 13 disposed in the magnetic gap of the
magnetic circuit 14 has two independent coils wound around one voice coil bobbin, and can be
independently input, and the driving force generated in the voice coil 13 generates the
diaphragm 10 It can be driven simultaneously. As described above, according to the
configuration of this embodiment, one diaphragm 10 can be driven simultaneously with
independent signals. FIG. 2 (d, shows a connection diagram of each speaker and amplifier in the
present embodiment. In FIG. 2, go to 6. 1a to 1C are cabinets, 2a to 2b are mid-tone speakers, 3a
to 3b are high-pitch speakers, 4 is a bass speaker, 5a to 5b are supply cords for audio signal
current, 6a to 6b are amplifiers, 7a to 7b Is a supply cord to the bass speaker, and 8a to 8b are
splitters. The operation of the connection method of the speaker system configured as described
above will be described below. The low frequency speaker 4 is configured of one diaphragm
while having two input units. The amplifiers 6a-6b respectively supply the left and right
channels. The outputs from the amplifiers 6a-6b are divided by the splitters 8a-8b into bass
signals and mid-high tone signals, and mid-high tone signals are fed to the mid-high tone
speakers 2 & -2b, 3a-3b with the supply cords 6?-5b. The signal is applied to the bass speaker 4
through the supply cords 71L to 7b to the bass speaker. The bass speaker 4 has two input
terminals for one diaphragm, so that one diaphragm can be simultaneously driven by signals
independent of each other. Although the number of input terminals is two in this embodiment,
the same is true even if a large number of input terminals are used. Hereinafter, a second
embodiment of the present invention will be described with reference to the drawings.
01-05-2019
2
FIG. 3 is a structural sectional view of a second embodiment of the present invention. In FIG. 3,
1C is a cabinet, 17 is a diaphragm, 18 is a frame, 19a to 19b are dampers, 20a to 20b are voice
coils, 21a to 21b are magnetic circuits, 22'L to 22b are lead wires, 23a to 23b. Is an input
terminal. The operation of the loudspeaker configured as described above will be described
below. The voice coils 20a to 20b disposed in the air gaps of the two magnetic circuits can be
supplied with independent signals supplied from the two input terminals to drive one diaphragm
17. By connecting the low frequency speakers as shown in FIG. 1, a 3D system can be realized. In
the present embodiment, with the above configuration, the same effect as that of the first
embodiment can be obtained. In the second embodiment, the magnetic circuits 21a to 21b and
the voice coil 20! Although only two each are shown in L to 20b, the same effect can be obtained
even if a large number of voice coils are used to connect them in series, in parallel or in series /
parallel. As described above, according to the present invention, a single diaphragm is driven by
a plurality of drive devices, and a plurality of input terminals corresponding to the respective
drive devices are provided, whereby a dedicated mixing device for a bass speaker or A 3D system
can be realized without using an amplifier. In addition, since the sound wave in the low frequency
region has a long wavelength, the sense of direction of the sound image can be felt <<, and the
stereo feeling is not impaired even if this method is used.
[0002]
Brief description of the drawings
[0003]
1 is a cross-sectional view of a bass reproduction speaker in the first embodiment of the present
invention, FIG. 2 is a connection diagram of each speaker and amplifier of the present invention,
and FIG. 3 is a bass reproduction in the second embodiment of the present invention. FIG. 4 is a
cross-sectional view of another embodiment of the speaker, and FIG. 4 is a connection diagram of
a conventional 3D system speaker and an amplifier.
9 eight -71a~1C ииииии cabinet, 2a~2b ииииии midrange speaker, 3a~3b ииииии treble for speaker, for 4 ......
bass Loudspeaker, 10: Diaphragm 11, 11: Frame 12, 12: Damper 13, voice coil 14, magnetic
circuit 152L ~15b ииииии lead, 16a~16b ииииии input terminal.
01-05-2019
3
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