JPH0582198

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DESCRIPTION JPH0582198
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
composite speaker used in various audio equipment.
[0002]
2. Description of the Related Art In recent years, with the spread of digital audio, it has become
essential to improve the performance of audio peripherals.
[0003]
In order to meet such requirements, composite speakers having a configuration such as
combining a bass speaker with a tweeter and a squawker are used.
[0004]
Hereinafter, a conventional composite speaker will be described with reference to the drawings.
FIG. 6 is a cross-sectional view showing the configuration of a conventional composite speaker.
In FIG. 6, reference numeral 1 denotes a field unit of a low frequency speaker, and the field unit
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1 includes an upper plate 1a, a lower plate 1c having a magnet 1b and a center pole, and the
upper plate 1a and lower portion A magnetic gap 10 is formed in the gap of the center pole
portion of the plate 1c. Further, 2 is a frame, 3 is a voice coil, 4 is a damper, and 5 is a
diaphragm.
[0005]
Reference numeral 6 denotes a tweeter and a squawker block, which couples the tweeter 6a and
the squawker 6b to the upper surface of the fixture 6c, and further, the network choke coil 6d of
the fixture 6c. It is coupled to the upper surface and wired to the bass speaker, tweeter 6a and
squawker 6b by a cord 6e.
[0006]
Also, attach the dustproof cushion 7 to the central part of the tweeter and squawker block 6, and
insert the attachment 6c with the screw on the inner periphery into the recess provided on the
upper portion of the center pole of the lower plate 1c The screw 8 is configured to be coupled via
a screw provided on the inner periphery of the attachment 6c.
[0007]
However, in the configuration of the prior art described above, when an input signal is applied to
the bass speaker and the diaphragm 5 vibrates, a large tweeter or squawker block portion is
formed on the front surface of the diaphragm 5. Because 6 is arranged, standing waves and
interference waves are generated, and the sound pressure in the midrange of the frequency
characteristics shown by the solid line in FIG. 3 rises, the balance of the frequency characteristics
worsens, and the sound quality deteriorates. was there.
[0008]
In addition, the tweeter 6 and the squawker block 6 have a problem in that the tweeter 6 and the
squawker block 6 are enlarged because the tweeter 6a, the squawker 6b, the choke coil 6d, and
the cord 6e are combined on the attachment 6c.
[0009]
Furthermore, when the tweeter 6a and the squawker 6b are wire-connected by the cord 6e, the
drawing method and fixing method of the cord 6e are complicated, and there is also a problem
that it is difficult to produce many parts.
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[0010]
The present invention solves the above-mentioned conventional problems, and provides a
composite type speaker which eliminates generation of standing waves and interference waves,
flattens frequency characteristics, provides excellent sound reproduction, and reduces the
number of parts in a small size. The purpose is to
[0011]
SUMMARY OF THE INVENTION In order to solve this problem, in the composite speaker of the
present invention, a choke coil for a network is disposed inside a mounting fixture, a terminal is
insert-molded on the upper surface, and the choke for a network is mounted on this terminal.
The coil, the speaker for bass, the tweeter, and the squawker are connected by wiring and
miniaturized.
[0012]
With this configuration, the size of the tweeter and squawker block that become an interferer on
the front of the diaphragm of the low frequency speaker is minimized to minimize the generation
of the standing wave and the interference wave, and the performance as a composite type
speaker is sufficient. Can be satisfied.
In addition, the number of parts can be reduced, and productivity can be improved.
[0013]
DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) An embodiment of the
present invention will be described below with reference to the drawings.
The same reference numerals are given to parts having the same configuration as the parts
described in the above-described conventional example.
[0014]
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FIG. 1 is a cross-sectional view showing the structure of a composite speaker according to the
present invention.
In FIG. 2, reference numeral 11 denotes details of the terminal insert-molded in the mounting
tool 6c.
[0015]
The composite speaker according to the present invention is a diaphragm in which the frame 2 is
coupled to the field unit 1 having the magnetic gap 10 formed by coupling the upper plate 1a,
the magnet 1b, and the lower plate 1c, and the voice coil 3 coupled to the center. The outer edge
portion of 5 is coupled to the outer edge portion of the frame 2 and the voice coil 3 is fitted into
the magnetic gap 10, and the damper 4 is coupled to form a main speaker which is a bass
speaker. The tweeter and squawker block 6 are disposed on the top surface.
[0016]
In the tweeter and squawker block 6, the tweeter 6a and the squawker 6b are coupled to the
upper portion of a mounting fixture 6c made of a polymer resin obtained by insert molding of
the terminal 11, and a choke coil for network is housed and arranged inside the mounting fixture
6c. Furthermore, the dustproof cushion 7 is joined to the central part of the tweeter and
squawker block 6, and the attachment 6c provided with a screw on the inner periphery is
inserted into the recess provided on the upper portion of the center pole of the lower plate 1c. It
is a structure connected via the screw part provided in the inner periphery of the mounting
fixture 6c with the mounting screw 8. FIG.
[0017]
The operation of the composite speaker of the present invention thus configured will be
described below.
[0018]
First, an external input signal is applied to the voice coil 3 through the gold wire 9 and driven
according to Fleming's left-hand rule, the voice coil 3, the damper 4 and the diaphragm 5
perform amplitude, and the woofer which is the main speaker Play a role as
[0019]
Furthermore, an input signal is applied to the tweeter and squawker block 6 located at the
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extension of the gold wire 9.
[0020]
The applied input signal is distributed to the tweeter 6a, the squawker 6b, and the network choke
coil 6d coupled to the interior of the fixture 6c through the terminal 11 which is insert-molded in
the fixture 6c.
The tweeter 6a and the squawker 6b to which the input signal is applied play a role as a highrange speaker and a mid-range speaker according to the same left-hand rule of Fleming as the
woofer.
Furthermore, the input signal is applied to the network choke coil 6d, which serves as a high cut
filter of the woofer.
[0021]
As described above, in the composite speaker according to the present embodiment, the woofer,
tweeter 6a, squawker 6b, and network choke coil 6d are wire-connected by the terminal 11
insert-molded to the fixture 6c, and the tweeter or squawker block 6 The size of the output sound
pressure can be reduced in a wide range of frequency bands as shown by the broken line in FIG.
3, because standing wave and excellent sound reproduction can be performed with the influence
of interference waves minimized. Flattened and excellent sound reproduction can be performed
[0022]
Also, the mounting tool 6c has a terminal 11 which is insert-molded, and by connecting the
network choke coil 6d to the inside, not only the miniaturization is possible but also the number
of parts is reduced and the process is simplified. It is something that can be done
[0023]
(Embodiment 2) A second embodiment of the present invention will be described below with
reference to the drawings.
[0024]
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FIG. 4 is a cross-sectional view showing the structure of a composite type loudspeaker according
to a second embodiment of the present invention. FIG. 5 shows an upper surface of the mounting
fixture 6c as a printed wiring board 12, and the woofer, tweeter 6a, squawker 6b, and network.
The choke coil 6 d is connected by wiring by the wiring pattern 13, and the configuration other
than the above is the same as that of the first embodiment, and therefore the description will be
made.
[0025]
The operation of the composite speaker according to the second embodiment configured as
described above will be described below.
[0026]
First, an external input signal is applied to the voice coil 3 through the gold wire 9 and driven
according to Fleming's left-hand rule, and the voice coil 3, the damper 4 and the diaphragm 5
perform amplitude as a main speaker woofer Play the role of
[0027]
Furthermore, an input signal is applied to the tweeter and squawker block 6 located at the
extension of the gold wire 9.
[0028]
The applied input signal is distributed to the tweeter 6a, the squawker 6b, and the choke coil 6d
for the network through the wiring pattern 13 formed in the fixture 6c.
The tweeter 6a and the squawker 6b to which the input signal is applied play a role as a highrange speaker and a mid-range speaker according to the same left-hand rule of Fleming as the
woofer.
[0029]
Furthermore, the input signal is applied to the network choke coil 6d, thereby serving as a high
cut filter of the woofer.
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[0030]
As described above, the composite speaker according to the present embodiment has the
structure of the printed wiring board 12 on the top surface of the mounting fixture 6c, and the
woofer, tweeter 6a, squawker 6b, and network choke coil 6d are connected by wiring. By
miniaturizing squawker block portion 6, the influence of standing waves and interference waves
can be minimized, and excellent acoustic reproduction can be performed, and output in a wide
frequency band like the frequency characteristic shown by the broken line in FIG. Sound pressure
can be flattened, and excellent sound reproduction can be performed.
[0031]
Also, by making the upper surface of the mounting fixture 6c the configuration of the printed
wiring board 12 and coupling the network choke coil 6d to the inside, not only miniaturization is
possible but also the number of parts is reduced and simplification of the process is realized. It
can be done.
[0032]
As described above, in the composite type speaker according to the present invention, the
tweeter on the upper surface of the diaphragm of the woofer which is the main speaker, and the
terminal is insert-molded on the upper surface of the fixture of the squawker block or the printed
wiring board The structure can be miniaturized by arranging the network choke coil inside the
mounting fixture, and excellent acoustic reproduction can be performed without being affected
by the standing wave and the interference wave, and the frequency characteristics can be
improved. It is possible to achieve planarization.
[0033]
In addition, by adopting a configuration in which the upper surface of the mounting tool is insertmolded to form a terminal or a substrate structure, the number of parts can be reduced, and an
excellent composite type speaker that can be easily manufactured can be realized.
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