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JPWO2013150735

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPWO2013150735
The sounding body is a sounding body included in the sound reproducing device mounted on the
mobile device. At least a portion of the sound generator also serves as at least a portion of any of
the emblem, the horn portion, and the mirror portion of the mobile device.
Sounding body, sound reproduction device using it, mobile device
[0001]
The present invention is mounted on a mobile device such as an electric car or a hybrid car, and
is used for a sound reproduction device that generates a pseudo engine sound and the like when
the mobile device travels with only a motor, and the sound reproduction device Concerning the
pronunciation body. The present invention also relates to a mobile device equipped with the
sound reproducing device.
[0002]
FIG. 21 is a block diagram showing the configuration of a conventional sound reproducing
apparatus, and FIG. 22 is a conceptual view showing a state in which a speaker of this sound
reproducing apparatus is provided.
[0003]
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1
As shown in FIG. 21, the conventional sound reproducing apparatus has a sound source unit 33,
an amplifier 34 for amplifying a signal output from the sound source unit 33, and a speaker 35
for reproducing the signal amplified by the amplifier 34.
As shown in FIG. 22, the speaker 35 is disposed in the engine room and emits a pseudo engine
sound or the like toward the engine room. With such a configuration, it is possible to notify a
pedestrian or the like of the approach of the traveling mobile device even in a state where the
mobile device travels only with the motor and no actual engine noise is generated (for example,
patent Literature 1).
[0004]
JP, 2011-31865, A
[0005]
The present invention is mounted on a mobile device such as an electric car or a hybrid car, and
generates a pseudo engine sound or the like when the mobile device travels only with a motor,
thereby providing a traveling mobile device to pedestrians etc. A sound reproducing device used
to indicate the approach of the sound source and a sound generator used for the sound
reproducing device.
Further, the present invention is a mobile device equipped with the sound reproducing device.
[0006]
The sound producing body of the present invention is a sound producing body included in a
sound reproducing device mounted on a mobile device. At least a portion of the sound generator
also serves as at least a portion of any of the emblem, the horn portion, and the mirror portion of
the mobile device. Further, the sound reproducing apparatus according to the present invention
includes an amplifier for amplifying a sound source signal and a sound generator for reproducing
a signal amplified by the amplifier, and the sound generator has the above-described
configuration. The mobile device according to the present invention is mounted on the sound
reproducing device, a sound source unit for supplying a sound source signal to an amplifier, a
main body unit mounting the sound reproducing device and the sound source unit, and an
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exterior member of the main body unit. It has at least one of an emblem, a horn unit mounted on
the front surface of the main unit, and mirror units mounted on both sides of the main unit.
[0007]
With these configurations, the sound is directed to the outside of the mobile device in
comparison with the conventional configuration which is mounted deep in the central portion in
the engine room of the mobile device and generates a sound toward the engine room. It can emit
noise directly and efficiently. Therefore, it can be alerted by notifying the pedestrian or the like of
the approach of the mobile device with sufficient sound volume and good sound quality, and
extremely high safety can be secured.
[0008]
FIG. 1A is a perspective view of a vehicle which is a mobile device according to an embodiment of
the present invention. FIG. 1B is a top view of the mobile device shown in FIG. 1A. FIG. 1C is a
block diagram showing the configuration of the sound reproduction device according to the
embodiment of the present invention. FIG. 2 is a cross-sectional view showing the configuration
of the sound generator in the first embodiment of the present invention. FIG. 3 is an output
sound pressure frequency characteristic diagram of the sounding body shown in FIG. FIG. 4 is a
cross-sectional view showing the configuration of another sound generator according to
Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view showing the
configuration of still another sounding body according to Embodiment 1 of the present invention.
FIG. 6 is an output sound pressure frequency characteristic diagram of the sounding body shown
in FIG. FIG. 7 is a block diagram showing the configuration of a sound reproduction device
according to Embodiment 2 of the present invention. FIG. 8 is a cross-sectional view of a sound
generator according to a second embodiment of the present invention. FIG. 9 is a cross-sectional
view of another sounding body in the second embodiment of the present invention. FIG. 10 is a
cross-sectional view of still another sounding body in the second embodiment of the present
invention. FIG. 11 is a block diagram showing a configuration of a sound reproduction device in a
third embodiment of the present invention. FIG. 12 is a partially cutaway perspective view of the
second sound producing portion of the sound producing body in the third embodiment of the
present invention. FIG. 13 is an acoustic output distribution diagram showing the distribution of
the acoustic output of the acoustic reproduction device shown in FIG. FIG. 14 is a partially
cutaway perspective view of another second sound producing unit of the sound producing body
according to Embodiment 3 of the present invention. FIG. 15 is a partially cutaway perspective
view showing a state in which a dustproof net is added to the second sound producing unit
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3
shown in FIG. FIG. 16 is a partially cutaway perspective view showing a state in which a
dustproof net is added to the second sound producing unit shown in FIG. FIG. 17 is a block
diagram showing the configuration of another sound reproducing device according to
Embodiment 3 of the present invention. FIG. 18 is an acoustic output distribution diagram
showing the distribution of the acoustic output of the acoustic reproduction device shown in FIG.
FIG. 19 is a block diagram showing the configuration of still another sound reproducing device
according to Embodiment 3 of the present invention. FIG. 20 is a block diagram showing the
configuration of still another sound reproducing device according to Embodiment 3 of the
present invention. FIG. 21 is a block diagram showing the configuration of a conventional sound
reproducing apparatus. FIG. 22 is a conceptual view showing a state in which a speaker of the
conventional sound reproducing apparatus is provided. FIG. 23 is an output sound pressure
frequency characteristic diagram of the conventional sound reproducing apparatus. FIG. 24 is an
acoustic output distribution chart showing the distribution of the acoustic output of the
conventional sound reproducing apparatus.
[0009]
Prior to the description of the embodiment of the present invention, problems in the
conventional sound reproduction apparatus shown in FIGS. 21 and 22 will be described. As
shown in FIG. 22, the speaker 35 in the conventional sound reproducing apparatus is disposed in
the engine room to reproduce pseudo engine sound and the like toward the inside of the engine
room. Therefore, it may be difficult to reliably notify the pedestrian or the like outside the mobile
device of the approach of the mobile device.
[0010]
An engine room of a mobile device such as an electric car or a hybrid car is equipped with many
large parts such as a motor, an engine, and a power control device. Therefore, there is almost no
space for mounting the speaker 35 in the engine room. Therefore, although the speaker 35 is a
component for reproducing sound to the outside of the mobile device, it has to be deeply
installed in the center of the engine room. As a result, the speaker 35 is configured to reproduce
toward the inside of the engine room.
[0011]
Due to these configurations, the reproduction efficiency of the speaker 35 to the outside of the
mobile device is extremely reduced, and a pseudo engine sound or the like does not sufficiently
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reach pedestrians and the like who are outside the mobile device.
[0012]
FIG. 23 is an output sound pressure frequency characteristic diagram showing an example of an
output sound pressure characteristic 2 m ahead of a mobile unit of a conventional sound
reproducing apparatus.
As shown in FIG. 23, the reduction of the volume of the speaker 35 and the deterioration of the
sound quality due to the attenuation of the high frequency can not be avoided. As a result, it is
difficult to reliably notify the approach of the mobile device, which makes it difficult for a
pedestrian or the like to notice the approach of the mobile device, which may result in an
accident.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. The same reference numerals are given to components having the same configuration
as the preceding embodiment, and detailed description may be omitted.
[0014]
FIG. 1A is a perspective view of a vehicle which is a mobile device according to an embodiment of
the present invention. FIG. 1B is a top view of the mobile device shown in FIG. 1A.
[0015]
The mobile device according to the present embodiment has a mode such as an electric car or a
hybrid car that travels without generating engine noise. If it does not generate an engine sound,
it may not be a four-wheeled vehicle. That is, the mobile device is not limited to a car, and may be
at least driven by an electric motor. For example, the mobile device may be a motorcycle, a
forklift, or a vehicle for work such as agriculture or forestry.
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[0016]
As shown in FIGS. 1A and 1B, this mobile device includes a sound source unit 101, an amplifier
102, and a main unit 50. The mobile device also has at least one of the emblem 2 (2A to 2C), the
horn unit 150, and the mirror unit 214.
[0017]
The sound source unit 101 holds a sound source signal, and supplies the sound source signal to
the amplifier 102. The amplifier 102 amplifies the source signal. The main body unit 50 includes
the sound source unit 101 and the amplifier 102. The emblem 2A is an exterior member of the
main body 50, and is mounted on the front grill 1 provided on the front surface. In addition to
the emblem 2A provided on the front surface of the main body 50, the emblem 2 may include an
emblem 2B provided on the side surface and an emblem 2C provided on the rear surface.
[0018]
The horn unit 150 is mounted on the front of the main unit 50. The mirror unit 214 includes a
mirror unit 214R on the right side and a mirror unit 214L on the left side, and is mounted on
both sides of the main body unit 50. Alternatively, it may include a rear mirror (not shown)
mounted on the rear surface.
[0019]
FIG. 1C is a block diagram showing a configuration of the sound reproduction device according
to the present embodiment. The sound reproduction device 100A includes an amplifier 102 and
a sound generator 103. The sound generator 103 reproduces the signal amplified by the
amplifier 102. At least a portion of the sounding body 103 doubles as at least a portion of any of
the emblems 2A to 2C, the horn portion 150, and the mirror portion 214 shown in FIG. 1B.
Therefore, the sound producing body 103 is also mounted on the main body 50.
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[0020]
In FIG. 1C, the sound source unit 101 is controlled by the control unit 60. The control unit 60
also receives a signal from the detection unit 70. The detection unit 70 is, for example, an
accelerator pedal, an acceleration sensor, a vehicle speed measuring device, or the like, and
outputs the speed or acceleration of the mobile device or a signal related thereto. The control
unit 60 controls the sound source unit 101 according to the signal from the detection unit 70 to
send the sound source signal to the amplifier 102. Alternatively, an input unit (not shown) may
be provided instead of the detection unit 70, and a signal for reproducing a pseudo engine sound
or the like may be input from the sound producing body 103 to the control unit 60 by the
driver's operation.
[0021]
With the above configuration, the sound reproducing apparatus 100A can emit the sound
directly and efficiently toward the outside of the mobile device. Therefore, the reproduction
efficiency at the time of sound emission to the outside of the mobile device is improved, and the
occurrence of the reduction of the volume and the deterioration of the sound quality is
eliminated. As a result, a pedestrian or the like can be reliably alerted with sufficient sound
volume and good sound quality, and extremely high safety can be ensured.
[0022]
Pedestrians and the like include people who are walking, including people who are simply
standing and those who are standing, such as sitting, and also include bicycles and motorcycles
other than pedestrians. In addition, animals such as dogs and cats other than humans are also
included. Furthermore, other vehicles may be included. In short, everything that needs to be
alerted when the car approaches is applicable.
[0023]
The sounding body 103 is mounted on the outer periphery of the mobile device and a portion
near the outer periphery. Therefore, the approach of the mobile device can be reliably notified to
pedestrians and the like who are on the outer periphery of the mobile device.
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[0024]
Here, the outer peripheral portion is the front direction or the side direction of the mobile device
when the mobile device moves forward. On the other hand, when the mobile device retracts, the
outer peripheral portion is in the back surface direction of the mobile device. Therefore, the outer
periphery of the mobile device includes all of the front direction, the side direction, and the rear
direction.
[0025]
(Embodiment 1) In this embodiment, an example in which the sounding body 103 is mounted on
the front surface of the main body 50 will be described as an example with reference to FIGS. 1A
to 6.
[0026]
As shown to FIG. 1A and FIG. 1B, the front grille 1 is provided in the front part of a mobile
apparatus, and comprises a part of main-body part 50 of a mobile apparatus.
The emblem 2A is provided on the front grille 1. In general, the emblem 2A is often designed
with a distinctive mark so as to identify a car maker or the like.
[0027]
FIG. 2 is a cross-sectional view showing the configuration of the sound producing body 103A
according to the present embodiment. The sounding body 103A has a voice coil 8, a magnetic
circuit 7, and a frame 10. Then, the sound producing body 103A uses the emblem 2A as a
vibrator. In other words, the vibrating body of the sound producing body 103A also serves as an
exterior member and also serves as the emblem 2A mounted on the front surface of the main
body 50 of the mobile device.
[0028]
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The magnetic circuit 7 is configured by connecting the yoke 5, the magnet 6, and the plate 4 in a
stacked state, and an annular magnetic gap is formed in the magnetic circuit 7. The voice coil 8 is
fitted in the magnetic gap.
[0029]
The tip of the voice coil 8 is directly coupled to the back of the emblem 2A, which is a vibrating
body. The frame 10 has a bottom 10A to which the magnetic circuit 7 is coupled, and an upper
portion 10B coupled to the back of the front grill 1 and supporting the emblem 2A to the
magnetic circuit 7 through the front grill 1.
[0030]
The sounding body 103A further has a suspension 9. The central portion 9 A of the suspension 9
supports the voice coil 8, and the outer peripheral portion 9 B is coupled to the plate 4 or the
frame 10.
[0031]
The details of the thus configured sounding body 103A and the sound reproducing apparatus
using the same will be described below. A signal such as a pseudo engine sound for notifying the
approach of the mobile device is amplified by the amplifier 102 shown in FIG. 1B and input to
the voice coil 8. Due to the magnetic force of the magnetic circuit 7 generated in response to this
signal, the voice coil 8 and the emblem 2A connected to the voice coil 8 oscillate to reproduce a
pseudo engine sound or the like for notifying the approach of the mobile device. Be done.
[0032]
The front grille 1 is not a particularly necessary component, and may be in front of a bonnet of a
mobile device or the like, and the same effect can be obtained if the emblem 2A can be attached.
[0033]
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9
Further, it is preferable that the emblem 2A be mechanically coupled to the front grill 1 via the
thin resin portion 3.
The resin portion 3 is provided to attach the emblem 2A to the front grill 1 which is an exterior
member. The resin portion 3 is more easily deformed than the emblem 2A which is a vibrating
body. With this configuration, the emblem 2A and the voice coil 8 that actually vibrate are
supported by the front grille 1 and the frame 10 by the resin portion 3 and the suspension 9.
Therefore, the emblem 2A and the voice coil 8 can perform piston movement accurately.
[0034]
FIG. 3 shows the output sound pressure frequency characteristics of the sound generator 103A
two meters ahead of the mobile device. As is clear from FIG. 3, the speaker 103A can output
sound with sufficient sound pressure in the entire frequency band from low to high. Even when
compared with the output sound pressure frequency characteristic diagram shown in FIG. 23, the
sound producing body 103A exhibits a remarkable effect.
[0035]
The sounding body 103A oscillates an emblem 2A of a car maker or the like located in front of
the mobile device to reproduce a pseudo engine sound or the like for notifying the approach of
the mobile device. Thus, the appearance of the mobile device is not sacrificed. With this
configuration, it is possible to suppress the occurrence of a drop in sound volume, a deterioration
in sound quality, and the like. Therefore, it is possible to reliably notify the pedestrian or the like
of the approach of the mobile device with a sufficient sound volume and a good sound quality.
And it is not necessary to newly attach the separate speaker as another object to a mobile
apparatus, and the structure as the sound reproduction apparatus 100A can be simplified
extremely.
[0036]
The resin portion 3 does not have to completely seal between the front grille 1 and the emblem
2A, and the holes may be opened in accordance with the desired output sound pressure
frequency characteristics.
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10
[0037]
In the above description, the emblem 2A is mechanically coupled to the front grill 1 through the
thin resin portion 3.
However, the invention is not limited to this structure. The emblem 2A may be configured
integrally with the front grille 1. The configuration may be any configuration as long as the
emblem 2A can be oscillated by the voice coil 8.
[0038]
Next, a sound generator with a different configuration will be described with reference to FIG.
FIG. 4 is a cross-sectional view showing the configuration of another sounding body 103B in the
present embodiment.
[0039]
The sounding body 103B is different from the sounding body 103A in that the emblem 2A is
mechanically coupled to the front grill 1 via the elastic sealing agent 11. That is, in the sounding
body 103A, the sounding body 103B has a structure in which the thin resin portion 3 is replaced
with the elastic sealing agent 11. The other configuration is the same as that of the sound
generator 103A.
[0040]
In this configuration, the emblem 2A and the voice coil 8 that actually vibrate are supported on
the front grille 1 and the frame 10 by the elastic sealing agent 11 and the suspension 9. The
elastic sealing agent 11 is provided to attach the emblem 2A to the front grill 1 which is an
exterior member. The elastic sealing agent 11 is more easily deformed than the emblem 2A
which is a vibrating body. By this structure, the emblem 2A and the voice coil 8 can be pistonoperated accurately. Therefore, the sounding body 103B has the same effect as the sounding
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11
body 103A.
[0041]
As the elastic sealing agent 11, a silicon-based adhesive, rubber or the like can be used. As the
rubber, an elastomer, a synthetic rubber, a natural rubber or the like can be used. In addition to
the elastic sealing agent 11, an elastic body may be provided on the outer periphery of the
emblem 2A, and the emblem 2A may be fixed to the front grill 1 with an adhesive or the like
through the elastic body. In this case, the elastic body may not be joined to the entire outer
periphery of the emblem 2A.
[0042]
Next, a sound generator with a different configuration will be described with reference to FIG.
FIG. 5 is a cross-sectional view showing the configuration of yet another sounding body 103C in
the present embodiment.
[0043]
The sounding body 103C differs from the sounding body 103A in that the diaphragm 12 is
coupled to the tip of the voice coil 8 and the emblem 2A is coupled to the voice coil 8 through
the gap 13. The other configuration is the same as that of the sound generator 103A.
[0044]
Specifically, the central portion of the back surface of the diaphragm 12 is coupled to the tip of
the voice coil 8. The periphery of the diaphragm 12 is coupled to the periphery of the upper end
of the frame 10. A gap 13 is formed between the diaphragm 12 and the back of the emblem 2.
The gap 13 constitutes a passive radiator type speaker.
[0045]
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12
In the sounding body 103C, a signal such as a pseudo engine sound for notifying the approach of
the mobile device is input to the voice coil 8. In response to this signal, the voice coil 8 and the
diaphragm 12, the air gap 13 and the emblem 2A connected thereto are vibrated (vibrated) in
this order by the magnetic force of the magnetic circuit 7. In this way, a pseudo engine sound or
the like for notifying the approach of the mobile device is emitted.
[0046]
Further, the emblem 2A, the diaphragm 12 and the voice coil 8 which are actually oscillated are
supported by the outer periphery of the thin resin portion 3 and the diaphragm 12 and the
suspension 9 on the front grill 1 and the frame 10. Therefore, the emblem 2A, the diaphragm 12,
and the voice coil 8 can perform piston movement accurately.
[0047]
FIG. 6 shows an output sound pressure frequency characteristic diagram of the sounding body
103C. Curve A in the figure shows the case where air gap 13 is sealed, curve B shows the case
where holes are provided in resin part 3, and curve C shows the case where many holes are
provided in resin part 3, front grille 1 and emblem 2A. The results are shown. As apparent from
FIG. 6, in any of the above-described configurations, the sounding body 103C is in the entire
frequency band from low to high as compared with the output sound pressure frequency
characteristic diagram of the conventional sound reproducing device shown in FIG. Sound can be
output with sufficient sound pressure. Then, it is possible to adjust to a desired output sound
pressure frequency characteristic by providing a hole in the resin portion 3 or the like and
partially opening the gap portion 13 from the closed state.
[0048]
In the sound-producing body 103C, the elastic sealing agent 11 shown in FIG. 4 may be used
instead of the resin part 3. Alternatively, the emblem 2A may be configured integrally with the
front grille 1. Any configuration may be used as long as the emblem 2A can be oscillated through
the voice coil 8, the diaphragm 12, and the gap 13.
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13
[0049]
In the sounding bodies 103A to 103C, the front grille 1 located in front of the mobile device and
the emblem 2A of a car maker or the like are used as a vibrating body. The front grille 1 and the
emblem 2 are originally designed as parts located in front of the mobile device. Therefore,
environmental performance such as quality and reliability is secured in consideration of wind
pressure at high speed traveling of a car and water droplets at the time of rain traveling.
Therefore, the environmental performance is much improved as compared with a speaker
mounted deep in the center of the conventional engine room and generating a sound toward the
engine room of the mobile device.
[0050]
If a conventional speaker with a diaphragm made of paper or thin resin is mounted in front of
the mobile device with the diaphragm facing the front of the mobile device, environmental
performance such as quality and reliability Can not secure. If the conventional speaker is
mounted in front of the mobile device and the diaphragm is mounted in front of the mobile
device, there is a high possibility that the speaker may be damaged by wind pressure at high
speed traveling or water droplets when traveling in rainy weather.
[0051]
From this point of view as well, it is very effective to use the front grille 1 and the emblem 2A
located in front of the mobile device as the vibrators.
[0052]
As described above, although the sound producing bodies 103A to 103C mounted on the front
surface of the mobile device are described as an example, the emblem 2B mounted on the side
surface of the mobile device and the emblem 2C mounted on the rear surface are used as the
vibrator. You may use it.
In either case, the same effect is obtained. Furthermore, by using any two or more of the
emblems 2A, 2B, and 2C as a vibrating body and mounting a sounding body, the effect can be
further enhanced.
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[0053]
(Embodiment 2) FIG. 7 is a block diagram showing a configuration of a sound reproducing
apparatus according to Embodiment 2 of the present invention. Sound reproduction device 100B
according to the present embodiment differs from sound reproduction device 100A shown in
FIG. 1C of the first embodiment in that a sound source signal amplified from amplifier 102 is
input to sounding body 103, and a horn is used. The horn signal is input from the signal
generation unit 104. The horn signal is a signal for generating a horn of the mobile device. That
is, the sound emitting body 103 according to the present embodiment has a structure in which
the speaker unit and the horn unit are integrated by sharing a part of parts. The amplified sound
source signal is input to the speaker unit, and the horn signal is input to the horn unit. Then, the
sound producing body 103 is mounted on the front of the mobile device on which a normal horn
is mounted. The other configuration is the same as that of the first embodiment. Hereinafter,
specific examples of the sounding body 103 according to the present embodiment will be
described with reference to FIGS.
[0054]
FIG. 8 is a cross-sectional view of a sounding body 103D according to this embodiment. The
sounding body 103D includes an electromagnetic coil 107, a pole 108 inserted in the
electromagnetic coil 107, a housing 105, a shaft 110, a diaphragm 109, a resonance plate 111, a
magnetic circuit 114, a voice coil 112, and a suspension 113. And.
[0055]
The current of the horn signal generator 104 shown in FIG. 7 is supplied to the electromagnetic
coil 107 through the contact point 106. The pole 108 is inserted into the electromagnetic coil
107 and integrated with the electromagnetic coil 107 to constitute an electromagnet. The
housing 105 is a housing of the sound producing body 103D, and is coupled to an
electromagnet. That is, the electromagnetic coil 107 and the pole 108 are coupled to the inner
bottom of the housing 105. The housing 105 is formed of metal, resin or the like. The shaft 110
is driven in the vertical direction in the figure by the magnetic force generated on the pole 108.
Diaphragm 109 includes a central portion 109 A that holds shaft 110 and an outer peripheral
portion 109 B coupled to housing 105. The resonance plate 111 is coupled to the upper end
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surface of the shaft 110, that is, opposite to the pole 108. The horn part for generating a horn by
the above structure is comprised. That is, the electromagnet, the housing 105, the shaft 110, the
diaphragm 109, and the resonance plate 111 constitute a horn unit mounted on the front surface
of the mobile device.
[0056]
The bottom of the magnetic circuit 114 is coupled to the upper inner surface of the housing 105.
The magnetic circuit 114 is configured by connecting the yoke 116, the magnet 117, and the
plate 115 in a stacked state. In the magnetic circuit 114, an annular magnetic gap is formed. The
magnetic gap is disposed to face the diaphragm 109 or the shaft 110. That is, the magnetic gap
is disposed to face the horn portion. The voice coil 112 is fitted in the magnetic gap. The tip of
the voice coil 112 is coupled to the resonance plate 111. The suspension 113 holds the voice coil
112 at the center, and the periphery of the suspension 113 is coupled to the magnetic circuit
114. The speaker unit configured to reproduce the sound for notifying the approach of the
mobile device is configured by the above configuration. That is, the magnetic circuit 114, the
voice coil 112, and at least one of the diaphragm 109 and the resonance plate 111 form a
speaker unit. Then, the voice source signal amplified by the amplifier 102 shown in FIG. 7 is
input to the voice coil 112.
[0057]
The details of the sound reproducing apparatus 100B using the sound producing body 103D
configured by the horn unit and the speaker unit as described above will be described below.
[0058]
First, the operation of the horn unit will be described.
When a horn signal is input from the horn signal generation unit 104 to the electromagnetic coil
107 via the contact point 106, the magnetic force generated in the electromagnetic coil 107
forms a magnetic field via the pole 108. The magnetic force attracts the shaft 110 held by the
diaphragm 109 and the resonance plate 111 coupled to the upper end surface of the shaft 110
to the pole 108.
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[0059]
At this time, at the same time, the contact 106 is driven and turned off, and the horn signal to the
electromagnetic coil 107 is cut off. For this reason, the shaft 110 and the resonance plate 111
return to their original positions by the restoring force of the diaphragm 109. And again, since
the contact point 106 is turned on, the shaft 110 and the resonance plate 111 are attracted to
the pole 108 again.
[0060]
As described above, in the horn portion, when the horn signal is input to the electromagnetic coil
107, the electromagnetic coil 107 is repeatedly turned on and off. As a result, the resonance
plate 111 vibrates in the vertical direction in the drawing to generate a horn.
[0061]
Next, the operation as the speaker unit will be described. The signal output from the sound
source unit 101 is power-amplified by the amplifier 102 and input to the voice coil 112. The
voice coil 112 and the resonance plate 111 and the diaphragm 109 coupled to the tip of the
voice coil 112 are vibrated in the vertical direction in the figure by the magnetic force of the
magnetic circuit 114 by this signal. A pseudo engine sound or the like for notifying the approach
of the mobile device is reproduced from the resonance plate 111 by this vibration. Thus, the
resonance plate 111 and the diaphragm 109 can be driven by either the electromagnetic coil
107 or the voice coil 112.
[0062]
Since the outer shape of the sound producing body 103D configured by the horn portion and the
speaker portion is the same as that of the conventional horn, the sound producing body 103D is
attached to the front of the mobile device at a position with few obstacles. For this reason, by
causing the resonance plate 111 to vibrate by the voice coil 112 and reproducing the sound for
informing the approach of the mobile device, it is possible to suppress the occurrence of the
reduction of the volume and the deterioration of the sound quality. As a result, it is possible to
reliably notify the pedestrian or the like of the approach of the mobile device. In addition, it is not
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necessary to newly attach both a separate horn and a speaker to the mobile device. Therefore,
size and weight reduction and price reduction can be realized simultaneously.
[0063]
Next, another example of the sound generator 103 shown in FIG. 7 will be described with
reference to FIG. FIG. 9 is a cross-sectional view of a sounding body 103E according to the
present embodiment. The sounding body 103E differs from the sounding body 103D in that a
shaft 123 is used instead of the shaft 110, and a resonance tube 124 is used instead of the
resonance plate 111. The other basic configuration is the same as that of the sound generator
103D.
[0064]
The shaft 123 is coupled to and held at the central portion of the diaphragm 109 in the same
manner as the shaft 110, and is driven in the vertical direction in the figure by the magnetic
force generated in the pole 108.
[0065]
The resonance tube 124 is provided on the upper side of the housing 105 and resonates and
emits the sound generated from the diaphragm 109 and the voice coil 112 to the outside.
Similar to the housing 105, the resonance tube 124 is formed of metal, resin or the like.
[0066]
Similar to the sound producing body 103D, the electromagnetic coil 107, the pole 108, the
housing 105, the shaft 123, and the diaphragm 109 constitute a horn portion for generating a
horn. On the other hand, the magnetic circuit 114, the voice coil 112, the diaphragm 109, and
the shaft 123 constitute a speaker unit that generates a sound for notifying the approach of the
mobile device.
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[0067]
The magnetic circuit 114 faces the diaphragm 109 or the shaft 110. That is, the magnetic circuit
114 is disposed to face the horn portion, and is coupled to a part of the resonance tube 124
provided in the housing 105. The center portion of the suspension 113 holds the voice coil 112,
and the peripheral portion of the suspension 113 is coupled to the resonance tube 124.
[0068]
An operation of the sounding body 103E configured by the horn unit and the speaker unit as
described above will be described. In the horn portion, when a horn signal is input from the horn
signal generation portion 104 shown in FIG. 7 to the electromagnetic coil 107, the diaphragm
109 vibrates in the vertical direction in the figure to generate a sound. This operation is similar
to that of the sound generator 103D. The resonance tube 124 resonates with this sound and
emits it to the outside to increase the volume and generate a horn.
[0069]
Next, the operation as the speaker unit will be described. The signal output from the sound
source unit 101 shown in FIG. 7 is power-amplified by the amplifier 102 and input to the voice
coil 112. Due to this signal, the voice coil 112 vibrates in the vertical direction in the figure by
the magnetic force of the magnetic circuit 114 to generate a sound. Further, the diaphragm 109
connected via the shaft 123 coupled to the tip of the voice coil 112 also vibrates in the vertical
direction in the figure by the magnetic force of the magnetic circuit 114 to generate a sound. The
resonance tube 124 resonates with this sound and emits the sound to the outside, thereby
increasing the reproduction level. Thus, the resonance tube 124 is disposed at a position that can
resonate with the vibration noise of the diaphragm 109 and the vibration noise of the voice coil
112.
[0070]
As described above, the sound producing body 103E has the same effect as the sound producing
body 103D.
[0071]
11-05-2019
19
Next, referring to FIG. 10, still another example of the sound generator 103 shown in FIG. 7 will
be described.
FIG. 10 is a cross-sectional view of a sounding body 103F according to the present embodiment.
The sounding body 103F differs from the sounding body 103E in that a shaft 140 is used instead
of the shaft 123, and a diaphragm 140 to which a voice coil 112 is coupled is provided. Also,
instead of the resonance pipe 124, a resonance pipe 137 disposed at a position where it can
resonate with the vibration sound of the diaphragm 109 which is the first diaphragm and the
vibration sound of the second diaphragm 140 is provided. The other basic configuration is the
same as that of the sound generator 103D.
[0072]
Similar to the shaft 123 shown in FIG. 9, the shaft 136 is coupled to and held by the central
portion of the diaphragm 109, and is driven in the vertical direction in the figure by the magnetic
force generated in the pole. However, it is not coupled to the voice coil 112.
[0073]
The resonance tube 137 is provided on the upper side of the housing 105. The housing 105 and
the resonance tube 137 are formed of metal or resin.
[0074]
The electromagnetic coil 107, the pole 108, the housing 105, the shaft 136, and the diaphragm
109 constitute a horn for generating a horn as in the case of the sounding body 103E. On the
other hand, the magnetic circuit 114, the voice coil 112, and the diaphragm 140 constitute a
speaker unit that generates a sound for notifying the approach of the mobile device.
[0075]
11-05-2019
20
The magnetic circuit 114 faces the diaphragm 109 or the shaft 136. That is, the magnetic circuit
114 is disposed to face the horn portion, and is coupled to a part of the resonance tube 137
provided in the housing 105. The central portion of diaphragm 140 is coupled to the tip of voice
coil 112, and the peripheral portion of diaphragm 140 is coupled to resonant tube 137. The
center portion of the suspension 113 holds the voice coil 112, and the peripheral portion of the
suspension 113 is coupled to the magnetic circuit 114.
[0076]
The operation of the sound producing body 103F configured by the horn unit and the speaker
unit as described above will be described. In the horn portion, when a horn signal is input from
the horn signal generation portion 104 shown in FIG. 7 to the electromagnetic coil 107, the
diaphragm 109 vibrates in the vertical direction in the figure to generate a sound. This operation
is similar to that of the sound generator 103E. The resonance tube 137 resonates with this sound
and emits it to the outside to increase the volume and generate a horn.
[0077]
Next, the operation as the speaker unit will be described. The signal output from the sound
source unit 101 shown in FIG. 7 is power-amplified by the amplifier 102 and input to the voice
coil 112. Due to this signal, the voice coil 112 and the diaphragm 140 vibrate in the vertical
direction in the figure by the magnetic force of the magnetic circuit 114 to generate a sound. The
resonance pipe 137 resonates with this sound and emits the sound to the outside, thereby
increasing the reproduction level.
[0078]
As described above, the sound producing body 103F has the same effect as the sound producing
bodies 103D and 103E.
[0079]
In the sounding bodies 103D to 103F, the horn unit mounted on the front surface and the
speaker unit for generating a sound for notifying the approach of the mobile device share the
11-05-2019
21
diaphragm 109, the resonance plate 111, and the resonance tubes 124 and 137. And integrated.
The horn is designed from the beginning as a component located on the front of the mobile
device. Therefore, environmental performances such as quality and reliability are secured in
consideration of wind pressure at high speed traveling and water droplets at the time of rain
traveling. That is, it has a much higher environmental resistance performance as compared to a
speaker mounted deep in the center of a conventional engine room and generating sound toward
the engine room of a mobile device.
[0080]
Ensuring environmental performance such as quality and reliability when a conventional speaker
with a diaphragm made of paper or thin resin is mounted on the front of the mobile device so
that the diaphragm faces the front of the mobile device You can not do it. That is, if the
conventional speaker is mounted as described above, there is a high possibility of breakage due
to wind pressure at high speed traveling and water droplets at the time of raining.
[0081]
In the sounding bodies 103D to 103F, the magnetic circuit 114 is disposed such that the
magnetic gap faces the horn portion. That is, the magnetic circuit 114 is mounted toward the
front of the mobile device. The magnetic circuit 114 is made of a metal body having high
environmental performance against wind pressure at high speed traveling, water droplets at
raining traveling, and the like. Further, the wind pressure when the car is traveling at high speed,
the influence on water droplets when traveling in the rain, and the like can be received by the
housing 105 made of a metal body, a resin, or the like. That is, the vibration component of the
speaker unit with low environmental resistance can be housed inside the housing 105. Therefore,
the speaker unit is not directly affected by wind pressure at high speed traveling or water
droplets at raining traveling.
[0082]
From this point of view as well, the sound producing members 103D to 103F in which the horn
portion and the speaker portion located on the front surface portion of the mobile device are
integrated are very effective.
11-05-2019
22
[0083]
Thus, while ensuring the environmental resistance performance such as quality and reliability,
the sounding bodies 103D to 103F are mounted in front of the mobile device which is the outer
peripheral portion of the mobile device and released toward the outside of the mobile device
Sound.
With this configuration, a pedestrian or the like can be reliably alerted with sufficient sound
volume and good sound quality, and extremely high safety can be ensured.
[0084]
Third Embodiment Prior to the description of the third embodiment of the present invention, a
further problem in the conventional sound reproducing apparatus will be described with
reference to FIG. FIG. 24 is an acoustic output distribution chart showing the distribution of the
acoustic output of the conventional sound reproducing apparatus. The substantially circular area
228 shows the distribution of the acoustic output that can be reproduced by a conventional
sound reproduction device. As apparent from the region 228, in the conventional sound
reproducing apparatus, although sound volume can be generated to some extent from the
speaker 35 in front of the mobile device, sound reproduction with sufficient output for the side
of the mobile device I can not
[0085]
That is, sound reproduction of sufficient output can not be performed because there is no
opening for emitting sound on the side surface of the mobile device. For this reason, when
turning the left or right of the mobile device with a high degree of risk, it is not possible to
reliably notify the pedestrian or the like traveling on the side of the mobile device and the front
thereof with the approach of the mobile device.
[0086]
11-05-2019
23
Hereinafter, the sound reproduction device and the sound generator according to the present
embodiment will be described with reference to FIGS. 11 to 13. FIG. 11 is a block diagram
showing the configuration of the sound reproduction device according to the present
embodiment.
[0087]
Sound reproducing apparatus 100C according to the present embodiment differs from sound
reproducing apparatus 100A shown in FIG. 1C in that sounding body 103 includes first sounding
unit 103L and second sounding unit 103R, and outputs from sound source unit 101 as an
amplifier. The first amplifier 202 and the second amplifier 204 separate the received source
signals and individually amplify the respective signals. Further, the first sound producing unit
103L and the second sound producing unit 103R respectively constitute mirror units 214L and
214R mounted on side surfaces of the main body unit 50 of the mobile device. The other
configuration is the same as that of the first embodiment.
[0088]
As in the first and second embodiments, the sound source unit 101 holds a sound source signal
that is a signal of a sound that indicates the approach of the mobile device such as a pseudo
engine sound. The sound source signal output from the sound source unit 101 is sounded from
the first sound generator 103 L via the first amplifier 202. Similarly, the sound source signal
output from the sound source unit 101 is sounded from the second sound generation unit 103R
via the second amplifier 204. As described above, the first sound producing unit 103L and the
second sound producing unit 103R constitute the left and right mirror units 214L and 214R of
the side surface of the mobile device, respectively.
[0089]
With this configuration, the sound notifying that the mobile device is approaching is reproduced
from the left and right first sound producing units 103L and second sound producing units 103R
to the front and the side of the mobile device. Therefore, the sound can be reproduced in a wide
range from a position close to the pedestrian's ear, as compared to the case where the speaker is
disposed in the conventional engine room. Therefore, it is possible to reliably notify the
pedestrian or the like in front of or on the side of the mobile device with a sufficient sound
11-05-2019
24
volume that the mobile device is approaching. As a result, it is possible to ensure extremely high
safety, including turning of the high risk mobile device.
[0090]
Next, the structure of the second sound producing unit 103R will be described as a
representative of the first sound producing unit 103L and the second sound producing unit 103R
with reference to FIG. The structure of the first sound producing unit 103L is symmetrical with
the structure of the second sound producing unit 103R, and thus the description thereof is
omitted. FIG. 12 is a partially cutaway perspective view of the second sound producing unit 103R
of the sound producing body 103 constituting the sound reproducing apparatus 100C shown in
FIG. Here, a case where the second sound producing unit 103R has a door mirror configuration
will be described as an example.
[0091]
The second sound producing unit 103R has a mirror housing 215, a mirror 216, and a speaker
218. The mirror housing 215 is attached to one (right side) of both sides of the mobile
apparatus. An acoustic opening 220 is formed on the bottom of the mirror housing 215 for
emitting the reproduced sound of the speaker 218 to the outside. The mirror 216 is attached to
the mirror housing 215.
[0092]
The speaker 218 is attached to a partial space inside the mirror housing 215. Specifically, the
speaker 218 is in communication with the acoustic opening 220 and is attached to the sound
conduit 219 for guiding the reproduced sound of the speaker 218. The sound source signal
amplified from the second amplifier 204 shown in FIG. 11 is input to the speaker 218. The
mirror housing 215 and the mirror 216 constitute a mirror portion 214R mounted on the side
surface portion of the mobile device shown in FIG. The mirror unit 214R may also have a motor
unit 217 for driving the mirror housing 215 and the mirror 216.
[0093]
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25
By providing the sound conduit 219, it is possible to eliminate phase interference before and
after the speaker 218. Furthermore, the reproduced sound of the speaker 218 can be emitted to
the outside with high quality and high sound quality. In addition, the degree of freedom in
arranging the speakers 218 can be greatly improved. In addition, the speaker 218 can be
protected from the wind that intrudes from the acoustic opening 220.
[0094]
In addition, providing the acoustic opening 220 on the bottom surface of the mirror housing 215
provides various effects. The first effect is that the reproduced sound of the speaker 218 is
emitted downward (to the ground). For this reason, the reproduced sound of the speaker 218 is
reflected and diffused to the ground. Therefore, the output of the reproduced sound can be
expanded more widely. The second effect is to reduce the possibility of rain wind entering from
the acoustic opening 220 and to protect the speaker 218 from rain wind.
[0095]
In the above description, an example in which the door mirror of the mobile device is configured
is described as an example of the second sound producing unit 103R, but it is also possible to
configure a fender mirror. The same effect can be obtained in this case as well.
[0096]
FIG. 13 shows the distribution of the sound output of the sound reproducing apparatus 100C
configured as described above. An area 209 indicates the acoustic output distribution from the
first sound producing unit 103L on the left side, and an area 210 indicates the acoustic output
distribution from the second sound producing unit 103R on the right. A region 211 shows the
distribution of synthetic sound output from the first sound producing unit 103L and the second
sound producing unit 103R. As apparent from FIG. 13, the acoustic output to the side of the
mobile device, which has been difficult to reproduce with the conventional acoustic reproduction
device, is expanded.
[0097]
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26
By reproducing the sound from the first sound producing unit 103L and the second sound
producing unit 103R in this manner, higher security can be obtained. That is, the sound output to
the side surface of the mobile device is sufficiently expanded as compared with the conventional
sound reproducing device, and high safety can be ensured.
[0098]
Next, another configuration of the second sound producing unit 103R constituting the sound
producing body will be described with reference to FIG. The configuration of the first sound
producing unit 103L is only symmetrical with the second sound producing unit 103R, so the
description will be omitted. FIG. 14 is a partially cutaway perspective view of another second
sound producing unit 103R of the sound producing body constituting the sound reproducing
apparatus shown in FIG.
[0099]
The second sound producing unit 103R shown in FIG. 14 does not have the sound conduit 219
shown in FIG. 12, but has a baffle plate 221 instead. The speaker 218 is mounted in the mirror
housing 215 via the baffle plate 221. That is, the baffle plate 221 intervenes between the
speaker 218 and the mirror housing 215. The baffle plate 221 reduces the phase interference
before and after the speaker 218 and then emits the reproduced sound to the outside from the
acoustic opening 220 provided on the bottom surface of the mirror housing 215. Even with this
configuration, sound can be reproduced with good sound quality.
[0100]
Next, a configuration in which the dustproof net 223 for protecting the speaker 218 is attached
to the speaker 218 will be described. FIG. 15 is a partially cutaway perspective view showing a
state in which a dustproof net 223 is added to the second sound producing unit 103R shown in
FIG. As a result, even if the wind or dust enters the interior of the mirror housing 215, the
speaker 218 can be protected from the wind and dust. Therefore, the reliability is improved.
11-05-2019
27
[0101]
FIG. 16 is a partially cutaway perspective view showing a state in which a dustproof net 223 is
added to the second sound producing unit 103R shown in FIG. The dustproof net 223 protects
the speaker 218 and the baffle plate 221. As a result, the speaker 218 can be protected from
wind and dust, and the reliability is further improved.
[0102]
Note that the dustproof net 223 may be provided to protect the sounding body 103 in other
embodiments in addition to the speaker 218 attached in the mirror housing 215. With this
configuration, it is also possible to prevent rain and dust from entering, and the reliability is
further improved.
[0103]
Next, a configuration for controlling the volume of the first sound producing unit 103L and the
second sound producing unit 103R in conjunction with the turn signal of the mobile device will
be described. FIG. 17 is a block diagram showing the configuration of another sound reproducing
apparatus according to this embodiment. In this configuration, in addition to the configuration
shown in FIG. 11, a first control unit 206, a second control unit 207, and a turn signal generation
unit 208 are provided. That is, in addition to the sound reproducing apparatus 100C, the sound
reproducing apparatus 100D includes a first control unit 206 and a second control unit 207.
[0104]
The turn signal generation unit 208 mounted on the mobile device outputs a turn signal when
turning left or right of the mobile device. The turn signal generation unit 208 can be configured
by, for example, an angular velocity sensor. Alternatively, the turn signal may be generated by
detecting the rotation direction of the steering operated by the driver or interlocking with the
turn indicator.
[0105]
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28
The first control unit 206 controls the first amplifier 202 in conjunction with the turn signal. The
second control unit 207 controls the second amplifier 204 in conjunction with the turn signal.
The first control unit 206 is provided, for example, between the sound source unit 101 and the
first amplifier 202, and the second control unit 207 is provided, for example, between the sound
source unit 101 and the second control unit 207. .
[0106]
The turn signal is input to the first control unit 206 when the mobile device is turned left, and is
input to the second control unit 207 when the mobile device is turned right. When the turn
signal is input, the first control unit 206 controls the first amplifier 202 to raise the volume level
by a fixed amount. Similarly, when the turn signal is input, the second control unit 207 controls
the second amplifier 204 to raise the volume level by a fixed amount. Further, when the turn
signal is not input, the first control unit 206 and the second control unit 207 respectively control
the first amplifier 202 and the second amplifier 204 so as to attain the normal volume level.
[0107]
FIG. 18 is an acoustic output distribution diagram showing the distribution of the acoustic output
of the acoustic reproduction device shown in FIG. An area 212 shows an acoustic output
distribution of the first sound producing unit 103L when a turn signal indicating a left turn is
input. An area 213 shows an acoustic output distribution of the second sound generator 103R
when a turn signal indicating a right turn is input. As is clear from FIG. 18, in conjunction with
the turn signal at the time of left turn or right turn of the mobile device, the reproduced sound
from one of the first sound producing unit 103L and the second sound producing unit 103R
increases in the turning direction, A pedestrian or the like can more easily sense the approach of
the mobile device. That is, the sound reproducing device 100D can surely alert a pedestrian or
the like with a sufficient sound volume, and can ensure extremely high safety.
[0108]
Further, when turning left or right, the reproduction sound in the turning direction may be
switched from a pseudo engine sound to a warning sound or the like. A possible configuration for
11-05-2019
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such switching will be described with reference to FIG. FIG. 19 is a block diagram showing the
configuration of still another sound reproducing apparatus according to this embodiment.
[0109]
In this configuration, the sound source unit 222 holds at least two types of sound source signals.
That is, the sound source unit 222 generates at least two different types of sound source signals.
The sound source signal output from the sound source unit 222 is amplified by the first amplifier
202, and the first sound generator 103L reproduces a sound based on the amplified sound
source signal. Similarly, the sound source signal output from the sound source unit 222 is
amplified by the second amplifier 204, and the second sound generator 103R reproduces a
sound based on the amplified sound source signal.
[0110]
The turn signal generation unit 208 is connected to the sound source unit 222. The sound source
unit 222 selects one of the plurality of sound source signals in response to the turn signal, and
outputs the selected sound source signal to one of the first amplifier 202 and the second
amplifier 204 in response to the turn signal. That is, when the turn signal is input, the sound
source unit 222 generates a sound to notify the left first amplifier 202 or the right second
amplifier 204 in the direction in which the mobile device tries to bend that the normal mobile
device is approaching. A sound source signal such as a warning sound different from a certain
pseudo engine sound is output. This warning sound may be a sine wave intermittent sound which
is often used as a warning sound, or a message based on music, voice or the like. With this
configuration, it is possible to further raise the alerting to the pedestrian or the like who is in the
direction of bending.
[0111]
In addition to the effects obtained by the above-described sound reproducing apparatus 100D,
the sound reproducing apparatus configured in this way further enhances the alerting to
pedestrians and the like who are in the direction in which the mobile apparatus tries to bend. It is
possible to secure higher security.
[0112]
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30
In addition to outputting the selected sound source signal to one of the first amplifier 202 and
the second amplifier 204 in accordance with the turn signal in the sound source unit 222, a
selection unit 224 may be provided as shown in FIG. .
FIG. 20 is a block diagram showing the configuration of still another sound reproducing
apparatus according to this embodiment.
[0113]
The selection unit 224 selects one of the plurality of sound source signals output from the sound
source unit 222 according to the turn signal, and is selected by the first amplifier 202 or the
second amplifier 204 according to the turn signal. Output the sound source signal. The selecting
unit 224 may be included in the sound reproducing apparatus 100F or may not be included in
the sound reproducing apparatus 100F as the turn signal generating unit 208. Even in this case,
the same effect as the sound reproducing device 100E can be obtained.
[0114]
The configuration described with reference to FIGS. 11, 17, 19 and 20 is not limited to the
configuration using the first sound producing unit 103L and the second sound producing unit
103R configured integrally with the mirror unit 214. That is, even if emblems 2B are provided on
both side surfaces of main body 50 and the configuration of the first embodiment is applied, the
same effect can be obtained.
[0115]
The sound reproducing apparatus according to the present invention is useful for an electric car,
a hybrid car and the like which need to accurately notify the pedestrian or the like of the
approach of the mobile device.
[0116]
Reference Signs List 1 front grille 2, 2A, 2B, 2C emblem 3 resin portion 4, 115 plate 5, 116 yoke
6, 117 magnet 7, 114 magnetic circuit 8, 112 voice coil 9, 113 suspension 9A, 109A central
portion 9B, 109B outer periphery Section 10 Frame 10A Bottom 10B Top 11 Elastic sealing
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31
agent 12 Diaphragm 13 Air gap 33, 101, 222 Sound source 34, 102 Amplifier 35, 218 Speaker
50 Main body 60 Control section 70 Detection section 100A, 100B, 100C, 100D, 100E , 100 F
Sound reproduction device 103, 103A, 103B, 103C, 103D, 103F Sounding body 103L 1st sound
generation unit 103R 2nd sound generation unit 104 horn signal generation unit 105 housing
106 contact point 107 electromagnetic coil 108 pole 109, 140 Ear frame 110, 123, 136 shaft
111 resonance plate 124, 137 resonance tube 150 horn unit 202 first amplifier 204 second
amplifier 206 first control unit 207 second control unit 208 turn signal generation unit 209,
210, 211, 212, 213 , 228 Area 214, 214R, 214L Mirror part 215 Mirror housing 216 Mirror
217 Motor part 219 Sound conduit 220 Acoustic opening part 221 Baffle plate 223 Dustproof
net 224 Selection part
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