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JP2012074780

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DESCRIPTION JP2012074780
An object of the present invention is to obtain an appropriate acoustic effect while reducing the
installation space. A low frequency range component of an R signal (right channel signal) and a
low L signal (left channel signal) using an R voice coil 11a and an L voice coil 11b (first voice coil
and second voice coil) The speaker unit 10 includes the woofer 11 for reproducing the range
component, the R tweeter 12 for reproducing the high range component of the R signal, and the
L tweeter 13 for reproducing the high range component of the L signal. [Selected figure] Figure 2
スピーカユニット
[0001]
The present invention relates to a speaker unit, and more particularly to a speaker unit capable
of obtaining an appropriate sound effect while reducing installation space.
[0002]
Conventionally, a speaker system is known which outputs various sound source information such
as music and voice in a cabin such as a car.
Such a speaker system is increasingly configured to include a tweeter that outputs high-pitched
sound in addition to the main speaker.
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1
[0003]
The sound source handled by the speaker system is usually a stereo signal consisting of an R
(Right) signal and an L (Left) signal. In such stereo signals, it is preferable that the R signal be
heard from the right and the L signal be heard from the left. Therefore, in the speaker system, it
is general to install the main speaker and tweeter for R signal on the right side of the vehicle and
the main speaker and tweeter for L signal on the left side of the vehicle.
[0004]
For example, Patent Document 1 discloses a speaker system in which a main speaker and tweeter
for R signal are installed on the right front door and a main speaker and tweeter for L signal are
installed on the left front door. The speaker system also includes two main speakers for the rear
seat and two tweeters on the left and right of the vehicle. That is, in the speaker system described
in Patent Document 1, a total of six speakers are installed in the vehicle cabin.
[0005]
JP 2001-069598 A
[0006]
However, as in the speaker system described in Patent Document 1, when a plurality of speakers
are mounted in the vehicle compartment, the installation space for each speaker must be
secured, which increases the restriction on the vehicle design. There was a problem.
[0007]
In addition, even if one speaker can be manufactured inexpensively or lightly, there is also a
problem that mounting a plurality of speakers increases the cost and weight.
[0008]
On the other hand, in a small and inexpensive vehicle such as a mini car, it may be preferable to
mount a compact and inexpensive speaker system rather than a speaker system having excellent
acoustic performance.
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[0009]
From these things, it is a big subject how to realize a speaker unit which can obtain an
appropriate sound effect while reducing the installation space.
[0010]
The present invention has been made to solve the above-mentioned problems of the prior art,
and it is an object of the present invention to provide a speaker unit capable of obtaining an
appropriate acoustic effect while reducing the installation space.
[0011]
In order to solve the problems described above and to achieve the object, the present invention is
a speaker unit in which a plurality of speakers are integrally incorporated, and a right channel
signal using a first voice coil and a second voice coil. , A right channel tweeter for reproducing
the treble band component of the right channel signal, and a tweeter for the left channel
reproducing the treble band component of the left channel signal. And are provided.
[0012]
According to the present invention, a woofer that reproduces the bass component of the right
channel signal and the bass component of the left channel signal using the first voice coil and the
second voice coil, and the treble component of the right channel signal Since the right channel
tweeter and the left channel tweeter for reproducing the high frequency range component of the
left channel signal are provided, it is possible to obtain an appropriate acoustic effect while
suppressing the installation space.
[0013]
FIG. 1 is a view showing an outline of a speaker unit according to the present invention.
FIG. 2 is a diagram showing the configuration of the speaker unit according to the present
embodiment.
FIG. 3 is a diagram showing an example of a specific configuration of the speaker unit.
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FIG. 4 is a view showing an arrangement example of the speaker unit.
FIG. 5 is a diagram showing another configuration example of the speaker unit.
FIG. 6 is a view showing another arrangement example of the speaker unit.
FIG. 7 is a diagram showing another configuration of the speaker unit.
[0014]
Hereinafter, embodiments of a speaker unit according to the present invention will be described
in detail with reference to the attached drawings.
First, prior to the detailed description of the embodiment, an outline of a speaker unit according
to the present invention will be described with reference to FIG.
FIG. 1 is a view showing an outline of a speaker unit according to the present invention.
[0015]
Note that (A) in the figure shows an example of a conventional speaker system and an example of
a speaker unit according to the present invention, and (B) in the figure shows acoustic effects
obtained by the speaker unit according to the present invention. It shows.
[0016]
Moreover, although the case where the speaker unit which concerns on this invention is used as
a vehicle-mounted speaker unit is demonstrated below, the speaker unit which concerns on this
invention is applicable also to uses other than a vehicle.
[0017]
As shown in FIG. 1A, in the conventional speaker system, the main speaker and tweeter for the R
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signal (Rch) and the main speaker and tweeter for the L signal (Lch) are individually installed.
[0018]
For example, as shown in (A-1) of the figure, in the conventional speaker system, the front
tweeter for R signal, the front main speaker and the rear main speaker are respectively installed
on the right side of the vehicle, and the front for L signal The tweeter, the front main speaker and
the rear main speaker were each installed on the left side of the vehicle.
[0019]
As described above, in the conventional speaker system, the acoustic effect is enhanced by
installing a plurality of speakers in the vehicle compartment at appropriate positions (right side
of the vehicle for R signal and left side of the vehicle for L signal). There may be problems with
installation space and cost.
[0020]
Therefore, as shown in (A-2) of the same figure, the speaker unit according to the present
invention includes a woofer adopting a dual voice coil and a tweeter for R signal (hereinafter
referred to as "R tweeter"). The installation space and the cost are reduced by integrally
incorporating a tweeter for L signal (hereinafter referred to as "L tweeter").
[0021]
Further, in the speaker unit according to the present invention, the woofer reproduces the bass
component of the R signal and the bass component of the L signal, the R tweeter reproduces the
treble component of the R signal, and the L tweeter generates the L signal. By reproducing the
high-frequency range component of the above, an appropriate acoustic effect can be obtained.
[0022]
Here, if R tweeter and L tweeter are integrally incorporated as in the speaker unit according to
the present invention, R tweeter and L tweeter are provided close to each other. There is a
possibility that the side voice and the L side voice outputted from the L tweeter are separated
and can not be heard.
[0023]
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Therefore, the speaker unit according to the present invention, as shown in (B) of the same
figure, even when the R tweeter and the L tweeter are integrally incorporated, the voice from the
R tweeter and the voice from the L tweeter are integrated. The arrangement of the R tweeter and
the L tweeter has been devised so that it can be heard separately.
Such points will be described later in the examples.
[0024]
Hereinafter, an embodiment of a speaker unit according to the present invention will be
described in detail.
In addition, below, the case where the speaker unit which concerns on this invention is used as a
vehicle-mounted speaker unit is demonstrated.
[0025]
First, the configuration of the speaker unit according to the present embodiment will be
described with reference to FIG.
FIG. 2 is a diagram showing the configuration of the speaker unit according to the present
embodiment.
Note that, in the figure, only the components necessary to explain the features of the speaker
unit are shown, and the description of general components is omitted.
[0026]
As shown in the figure, the speaker unit 10 includes a woofer 11, an R tweeter 12, and an L
tweeter 13.
[0027]
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The woofer 11 is a speaker that reproduces bass components of the R signal and the L signal
which are stereo signals.
Specifically, the woofer 11 reproduces the R signal output from the amplifier 21R of the main
unit 20 using the R voice coil 11a, and the L signal output from the amplifier 21L of the main
unit 20 is L voice coil 11b. Use to play.
[0028]
When the R signal and the L signal are input to the R voice coil 11a and the L voice coil 11b,
respectively, the woofer 11 outputs a sound of a bass component with a small phase change.
The sound output from the woofer 11 is a synthesized sound of R and L signals (voice converted
into monaural).
[0029]
Thus, the woofer 11 is a dual voice coil type woofer that reproduces the bass component of the R
signal and the bass component of the L signal using two voice coils.
[0030]
The main unit 20 amplifies various stereo signals (R signal and L signal) acquired from a DVD
(Digital Versatile Disc) deck, a TV (Television) tuner, etc., and outputs them to an audio output
device such as the speaker unit 10 or the like. It is a unit.
[0031]
Specifically, the main unit 20 includes the amplifiers 21R and 21L and the amplifiers 22R and
22L.
Here, the amplifier 21R and the amplifier 22R are amplifiers that amplify an R signal, and the
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amplifiers 21L and 22L are amplifiers that amplify an L signal.
[0032]
Thus, main unit 20 generally includes two pairs of an amplifier for R signal and an amplifier for L
signal, and these pairs are, for example, for front and rear seats, respectively. Used.
[0033]
Here, the R-side input terminal of the speaker unit 10 is connected to the amplifier 21R, and the
L-side input terminal is connected to the amplifier 21L.
As described above, in this embodiment, two of the four amplifiers provided in the main unit 20
are used.
In this embodiment, a dual-coil woofer is used to output the bass component of the R signal input
from the amplifier 21R and the bass component of the L signal input from the amplifier 21L
using one woofer. It was decided to.
[0034]
The R tweeter 12 is a t-signal tweeter for reproducing the high range component of the R signal
output from the amplifier 21R.
Specifically, the R tweeter 12 includes a capacitor 12a that cuts the bass component of the R
signal output from the amplifier 21R, and the R signal (that is, the R signal with the bass
component cut by the capacitor 12a) Play the treble range component of
[0035]
The L tweeter 13 is a t-signal tweeter for reproducing the high range component of the L signal
output from the amplifier 21L.
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Specifically, the L tweeter 13 includes a capacitor 13a that cuts the low frequency range
component of the L signal output from the amplifier 21L, like the R tweeter 12, and the L low
frequency range component is cut by the capacitor 13a. The signal (i.e., the high range
component of the L signal) is reproduced.
[0036]
When only one speaker unit 10 is installed on the vehicle, the amplifiers 22R and 22L of the
main unit 20 become unnecessary, and therefore, the main unit from which these amplifiers 22R
and 22L are deleted is mounted on the vehicle. It is also good.
[0037]
Next, an example of a specific configuration of the speaker unit 10 will be described with
reference to FIG.
FIG. 3 is a diagram showing an example of a specific configuration of the speaker unit 10. As
shown in FIG.
[0038]
As shown in FIG. 3, the woofer 11 is loosely inserted between the magnetic circuit portion 11c,
the frame 11d fixed to the magnetic circuit portion 11c, and the top plate 11c-1 and the center
pole 11c-2 of the magnetic circuit portion 11c. A voice coil bobbin 11e having a cylindrical
shape, an R voice coil 11a and an L voice coil 11b wound around the voice coil bobbin 11e, a
conical diaphragm 11f joined to the voice coil bobbin 11e, and a voice coil bobbin 11e elastically.
It is mainly comprised by the damper 11g to support.
[0039]
The magnetic circuit portion 11c is provided between a disk-like top plate 11c-1 having an
opening at the center, a yoke 11c-3 including a center pole 11c-2, a yoke 11c-3, and a top plate
11c-1. And an annular magnet 11c-4.
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Here, a predetermined space (magnetic gap) is formed between the top plate 11c-1 and the
center pole 11c-2, and in this space, the R voice coil 11a and the L voice wound around the voice
coil bobbin 11e The coil 11b is accommodated.
[0040]
The R voice coil 11a is electrically connected to the amplifier 21R through the lead wire 11h, and
is a member that converts the R signal output from the amplifier 21R into vibration.
Similarly, the L voice coil 11b is electrically connected to the amplifier 21L through the lead wire
11i, and is a member that converts the L signal output from the amplifier 21L into vibration.
[0041]
Specifically, when an R signal and an L signal are input to the R voice coil 11a and the L voice
coil 11b, respectively, an electromagnetic force acts, and the R voice coil 11a and the L voice coil
11b are voice coil bobbins 11e by the electromagnetic force. It vibrates integrally with it.
[0042]
The diaphragm 11f is joined to the voice coil bobbin 11e, and is integrated with the R voice coil
11a and the L voice coil 11b through the voice coil bobbin 11e.
The diaphragm 11f is elastically fixed to the frame 11d via the edge portion 11j. As a result, in
the woofer 11, the diaphragm 11f vibrates along with the vibration of the R voice coil 11a and
the L voice coil 11b, so that a synthesized sound of the R signal and the L signal is output.
[0043]
Damper 11g is a disk-like elastic member in which a recess and a protrusion are alternately
formed, and elastically supports voice coil bobbin 11e that vibrates with the vibration of R voice
coil 11a and L voice coil 11b. Play a role in
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[0044]
On the other hand, the R tweeter 12 and the L tweeter 13 are provided substantially at the center
of the output surface of the woofer 11.
Then, in the speaker unit 10, the output sound from the R tweeter 12 is attached by attaching the
R tweeter 12 and the L tweeter 13 such that the output face 12b of the R tweeter 12 and the
output face 13b of the L tweeter 13 form a predetermined angle. And the output sound from the
L tweeter 13 are separated as much as possible.
[0045]
When installed in the passenger compartment, the speaker unit 10 is installed in the direction in
which the R tweeter 12 and the L tweeter 13 are disposed on the left and right as viewed from
the listener. Specifically, the speaker unit 10 outputs the R-side audio from the R tweeter 12
toward the right ear of the listener, and outputs the L-side audio from the L tweeter 13 toward
the left ear of the listener Installed in the direction that
[0046]
Hereinafter, an arrangement example of the R tweeter 12 and the L tweeter 13 will be described
with reference to FIG. 4 together with an arrangement example of the speaker unit 10 in the
vehicle compartment. FIG. 4 is a view showing an arrangement example of the speaker unit 10.
Note that (A) in the figure shows an arrangement example of the R tweeter 12 and the L tweeter
13, and (B) in the figure shows an arrangement example of the speaker unit 10.
[0047]
As shown to (A) of the figure, when using the speaker unit 10 as a speaker for 1 persons, it is
installed ahead of a seating position of a listener. The R tweeter 12 and the L tweeter 13 have an
angle of 180 degrees between the output face 12 b of the R tweeter 12 and the output face 13 b
of the L tweeter 13 as viewed from the direction of gravity as shown in FIG. It is attached to be
large.
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[0048]
That is, in the speaker unit 10, when installed in a vehicle, the R tweeter 12 outputs the R side
audio toward the listener's right ear side than the front direction of the speaker unit 10, and the
L tweeter 13 outputs the speaker The L-side sound is output toward the listener's left ear side
more than the front direction of the unit 10.
[0049]
As a result, the R-side sound reproduced by the R tweeter 12 can easily reach the listener's right
ear, and the L-side sound reproduced by the L tweeter 13 can easily reach the listener's left ear.
Therefore, even when the R tweeter 12 and the L tweeter 13 are disposed close to each other in
the unit, it is possible to suppress the deterioration of the acoustic effect due to the mixing of the
R side voice and the L side voice.
[0050]
In addition, as shown to (B) of the figure, when installing the speaker unit 10 for drivers, it is
good also as providing in instrument panels in which instruments, such as a meter, an operation
switch, etc. are arrange | positioned ( See (B-1) in FIG. When the speaker unit 10 is installed in
the front passenger seat, it may be installed in a dashboard in front of the front passenger seat.
[0051]
Also, the speaker unit 10 may be disposed on the upper part of the dashboard (including the
instrument panel), and the output sound from the speaker unit 10 may be reflected on the
windshield of the vehicle to be heard by the listener (FIG. Of (B-2)).
[0052]
In addition, when there is a space between the windshield and the dashboard, the speaker unit
10 may be disposed in such space (see (B-3) in the same figure).
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Also in this case, as in the case shown in (B-2) of the same figure, the listener can hear the output
sound from the speaker unit 10 by reflecting it on the windshield.
[0053]
In the speaker unit 10, as shown in (A) of the figure, the R tweeter 12 is positioned closer to the
listener's right ear than the median surface of the listener who has properly seated on the seat,
and the L tweeter 13 However, it is preferable to arrange so that it may be located on the
listener's left ear side of this median plane.
[0054]
By the way, up to now, R tweeter 12 and L tweeter 13 are attached at a predetermined angle to
make it easier for the R side audio to reach the listener's right ear and the L side audio to reach
the listener's left ear. However, the method for separating the R-side speech and the L-side
speech is not limited to this.
[0055]
Hereinafter, another separation method of the R side speech and the L side speech will be
described with reference to FIG.
FIG. 5 is a view showing another configuration example of the speaker unit 10.
[0056]
For example, as shown in FIG. 5A, the R tweeter 12 and the L tweeter 13 may be disposed as far
apart as possible in the speaker unit 10.
Specifically, the R tweeter 12 and the L tweeter 13 are respectively provided at the left and right
ends of the woofer 11 as viewed from the listener.
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[0057]
As a result, when the speaker unit 10 is installed in front of the listener, the R-side audio is
output from the right ear side than the median plane of the listener, and the L-side audio is
output from the left ear side than the same median plane. As a result, the R-side audio can easily
reach the listener's right ear, and the L-side audio can easily reach the listener's left ear.
[0058]
As described above, also by disposing the R tweeter 12 and the L tweeter 13 as far apart as
possible in the unit, it is possible to suppress the reduction of the acoustic effect due to the
mixing of the R side voice and the L side voice.
[0059]
Further, as shown in (B) of the same figure, the acoustic lenses 14R and 14L may be attached to
the R tweeter 12 and the L tweeter 13, respectively.
Here, the acoustic lenses 14 </ b> R and 14 </ b> L are regulating members configured by a
plurality of vanes arranged in parallel with each other at a predetermined interval.
That is, the acoustic lens 14R plays a role of restricting the output direction of the R-side voice in
the direction to move away from the output direction of the L-side voice, and the acoustic lens
14L moves the output direction of the L-side voice away from the output direction of the R-side
voice It plays a role in regulating the direction.
[0060]
Specifically, the acoustic lens 14R bends the output direction of the R-side audio output from the
R tweeter 12 to the right ear side of the listener, and the acoustic lens 14L transmits the L-side
audio output from the L tweeter 13 The output direction is bent to the listener's left ear side.
[0061]
As a result, the R-side voice and the L-side voice are further separated, so that it is possible to
further suppress the deterioration of the acoustic effect due to the mixing of the R-side voice and
the L-side voice.
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[0062]
Also, as shown in (C) of the figure, the horns 15R and 15L may be attached to the R tweeter 12
and the L tweeter 13 instead of the acoustic lenses 14R and 14L.
[0063]
Here, the horn 15R is a regulating member that regulates the output direction of the R-side voice
output from the R tweeter 12 to the right ear side of the listener, and the horn 15L is a L-side
voice output from the L tweeter 13 It is a regulation member which regulates the output
direction to the listener's left ear side.
By mounting the horns 15R and 15L, the same effect as that of the acoustic lenses 14R and 14L
can be obtained.
[0064]
When the horns 15R and 15L are attached, the R tweeter 12 and the L tweeter 13 are provided
behind the output surface of the woofer 11 to prevent the depth of the speaker unit 10 from
increasing, and the horns 15R and 15L are provided. It is preferable to secure the installation
space of
[0065]
Further, although the acoustic lens and the horn are provided in both of the R tweeter 12 and the
L tweeter 13 here, the acoustic lens and the horn may be provided only in one of the R tweeter
12 and the L tweeter 13.
[0066]
Here, the R tweeter 12 and the L tweeter 13 are attached so that the output face faces the
listener, but as shown in FIG. 4, the R tweeter 12 and the L tweeter 13 are attached at a
predetermined angle. In addition, the acoustic lenses 14R and 14L and the horns 15R and 15L
may be further attached to the R tweeter 12 and the L tweeter 13.
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In this way, the R-side signal and the L-side signal can be separated more reliably.
[0067]
Further, as another separation method of the R-side signal and the L-side signal, for example, a
partition plate may be provided between the R tweeter 12 and the L tweeter 13.
[0068]
As described above, in the present embodiment, the speaker unit 10 uses the R voice coil (first
voice coil) and the L voice coil (second voice coil) to generate the bass component of the R signal
and the L signal. It comprises the woofer which reproduces the low range component, the R
tweeter which reproduces the high range component of the R signal, and the L tweeter which
reproduces the high range component of the L signal.
Therefore, an appropriate acoustic effect can be obtained while reducing the installation space.
[0069]
Also, in this embodiment, R tweeter and L tweeter are attached at a predetermined angle, R
tweeter and L tweeter are placed as far apart as possible in the unit, and acoustic lens and horn
are attached to R tweeter and L tweeter. As a result, it is possible to suppress the deterioration of
the sound effect by integrating the R tweeter and the L tweeter integrally.
[0070]
In the embodiment described above, the case where the speaker unit 10 is used as a one-person
speaker unit has been described. However, depending on the installation position, the speaker
unit 10 can be used as a two-person speaker unit.
[0071]
Below, the example of arrangement | positioning in the case of using the speaker unit 10 as a
speaker unit for two persons is demonstrated using FIG.
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FIG. 6 is a view showing another arrangement example of the speaker unit.
In the case of installing one speaker unit 10 in the vehicle 100 in (A) of the figure, and in the
case of installing two speaker units 10 in the vehicle 100 in (B) of the figure. Respectively.
[0072]
As shown to (A) of the figure, when used for two persons, the speaker unit 10 should just be
provided in the position on the center line of the vehicle 100, or the vicinity of the said position.
For example, when the speaker unit 10 is installed as a speaker unit for the listener A seated in
the driver's seat and the listener B seated in the front passenger seat, the speaker unit 10 is a
position where the dashboard intersects with the center line of the vehicle 100 or near the
position. It should be provided in
[0073]
Here, the direct sound S1 of the R side voice output from the R tweeter 12 is output toward the
right ear of the listener A, and the reflected sound S2 of the R side voice reflected by the side
glass is to the right ear of the listener B By arranging the R tweeter 12 so as to be output toward
the head, it is possible to appropriately listen to the R-side voice to the listener A and the listener
B.
[0074]
Similarly, the direct sound S3 of the L-side audio output from the L tweeter 13 is output toward
the left ear of the listener B, and the reflected sound S4 of the L-side audio reflected by the side
glass is output to the right ear of the listener A By arranging the L tweeter 13 so that it is output
toward the head, it is possible to properly listen to the L-side voice to the listener A and the
listener B.
[0075]
Further, as shown in FIG. 6B, a speaker unit 10R for the rear seat may be provided to the vehicle
100 in addition to the speaker unit 10F for the front seat.
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In such a case, the rear seat speaker unit 10R may be provided, for example, at a position
intersecting the center line of the vehicle 100 at the top of the rear tray or in the vicinity of the
position.
[0076]
In addition, as with the front-seat speaker unit 10F, the direct sound S5 of the R-side voice is
directly to the listener C's right ear, the reflection sound S6 of the R-side voice is directly to the
listener D's right ear, By arranging the R tweeter 12 and the L tweeter 13 so that the sound S7 is
outputted to the left ear of the listener D and the reflected sound S8 of the L side sound to the
left ear of the listener C, the listener C and the L tweeter 13 are The listener D can properly hear
the R-side voice and the L-side voice.
[0077]
The rear seat speaker unit 10R may be connected to the amplifier 22R and the amplifier 22L of
the main unit 20 shown in FIG.
[0078]
Further, in the embodiment described above, the case of acquiring the R signal and the L signal
using two of the four amplifiers provided in the main unit 20 has been described, but the present
invention is not limited to this. All four amplifiers may be used.
Below, the structural example of the speaker unit 10 in this case is demonstrated using FIG.
FIG. 7 is a view showing another configuration of the speaker unit 10.
[0079]
As shown in FIG. 7, in the speaker unit 10, the woofer 11 may be connected to the amplifier 21R
and the amplifier 21L, the R tweeter 12 may be connected to the amplifier 22R, and the L
tweeter 13 may be connected to the amplifier 22L. .
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As described above, the speaker unit 10 can also have input systems to the woofer 11, the R
tweeter 12 and the L tweeter 13 separately by being provided with four input terminals.
[0080]
As described above, the speaker unit according to the present invention is useful when it is
desired to obtain an appropriate acoustic effect while reducing the installation space, and is
particularly suitable for application to a small vehicle where installation of a large number of
woofer speakers is difficult ing.
[0081]
DESCRIPTION OF SYMBOLS 10 Speaker unit 11 Woofer 11a R voice coil 11b L voice coil 11c
Magnetic circuit part 11c-1 top plate 11c-2 center pole 11c-3 yoke 11c-4 magnet 11d frame 11e
voice coil bobbin 11f diaphragm 11g damper 11h, 11i lead wire 11j edge part 12 R tweeter 12a
capacitor 12b output surface 13 L tweeter 13a capacitor 13b output surface 20 main unit 21R,
22R amplifier (for R signal) 21L, 22L amplifier (for L signal) 14R, 14L acoustic lens 15R, 15L
horn 100 vehicle
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