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JP2007129540

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2007129540
To provide an audio switching device capable of connecting non-genuine equipment to a genuine
in-vehicle sound system and improving the sound quality, and an in-vehicle sound system using
the same. In a voice switching device according to the present invention, a first input terminal 11
is connected to a genuine device, a second input terminal 12 is connected to a non-genuine
device, and an output terminal 13 is connected to a genuine vehicle-mounted speaker Ru. The
amplifier 14 amplifies the signal supplied to the second input terminal 12 and supplies the signal
to the switching circuit 15. The switching circuit 15 switches the signals supplied to the first and
second input terminals 11 and 12 and supplies the switched signal to the output terminal 13. In
the in-vehicle sound system according to the present invention configured by combining the
voice switching device 10, the genuine device 20, the non-genuine device 30, the in-vehicle
speaker 40, etc. Convert to speech. [Selected figure] Figure 3
Audio signal input switching device for in-vehicle electronic device, and in-vehicle sound system
using the same
[0001]
The present invention relates to an audio signal input switcher for vehicle electronic devices
(hereinafter simply referred to as a sound switcher) and an in-vehicle sound system using the
same.
[0002]
With the rapid development of in-vehicle electronic devices in recent years, automobiles are
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1
equipped in advance with audio devices such as FM / AM radio tuners, CD / MD players,
speakers, etc. as genuine in-vehicle electronic devices. The genuine in-vehicle electronic devices
are mutually connected by LAN (Local Area Network) to constitute a genuine in-vehicle sound
system.
In the present specification, a genuine on-vehicle electronic device (hereinafter simply referred to
as a genuine device) is generally used in the meaning of specifying an on-vehicle electronic
device which a car manufacturer has equipped at the time of shipment of a vehicle.
[0003]
By the way, this type of in-vehicle electronic device is a field where product development is
remarkable, and there is a need in the market for attaching a commercially available non-genuine
in-vehicle electronic device (hereinafter simply referred to as non-genuine device) to a genuine
in-car sound system. Is very expensive. For example, when purchasing a newest DVD player, a car
navigation device with a DVD reproduction function, a TV tuner, etc., these commercially
available non-genuine devices are connected to the above-mentioned genuine in-car sound
system and the sound is genuine There is a very high market demand for out-of-vehicle speakers.
[0004]
On the other hand, since the genuine device that constitutes the genuine in-vehicle sound system
usually differs from the general-purpose specification in the specifications of the audio signal
input / output terminal, it does not have an external input / output terminal connectable to nongenuine devices. It was not possible to connect a commercially available non-genuine device
directly to the system.
[0005]
Therefore, conventionally, as shown in Patent Documents 1 and 2, the voice signal of the nongenuine device is jumped to an open frequency band of the FM / AM radio using, for example, a
transmitter or the like to transmit it through the FM / AM radio tuner. , The audio signal is
supplied to a genuine car speaker.
[0006]
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2
However, according to the wireless transmission methods as shown in Patent Documents 1 and
2, since the free frequency band of the FM / AM radio is different in each area, the wireless
transmission from the non-genuine device when moving by a car over a long distance The audio
signal output by the method interferes with the existing FM / AM radio wave, and there arises a
problem that stable reproduction can not be performed.
In addition, in the wireless transmission method, the sound quality required by the user tends not
to be sufficiently realized.
JP, 2002-57588, A JP, 11-41691, A
[0007]
An object of the present invention is to provide an audio switching device capable of connecting
a non-genuine device to a genuine in-vehicle sound system, and an in-vehicle sound system using
the same.
[0008]
Another object of the present invention is to provide a sound switch capable of improving the
sound quality and an in-vehicle sound system using the same.
[0009]
In order to solve the problems described above, an audio switch according to the present
invention includes a first audio signal input terminal, a second audio signal input terminal, an
amplifier, a switching circuit, and an audio signal output terminal.
The first audio signal input terminal is a terminal connected to a genuine device, the second
audio signal input terminal is a terminal connected to a non-genuine device, and the audio signal
output terminal is a terminal connected to a genuine vehicle-mounted speaker It is.
The amplifier amplifies the signal supplied to the second audio signal input terminal and supplies
the amplified signal to the switching circuit. The switching circuit switches between the signal
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3
supplied to the first audio signal input terminal and the signal supplied to the second audio
signal input terminal and amplified by the amplifier, and switches the switched signal. Supply to
the audio signal output terminal.
[0010]
The voice switch described above is combined with a genuine device, a non-genuine device, and a
genuine in-vehicle speaker to constitute an in-vehicle sound system. In the in-car sound system,
the genuine device is connected to the first audio signal input terminal, and the non-genuine
device is connected to the second audio signal input terminal. The genuine on-vehicle speaker is
connected to the audio signal output terminal of the audio switch, and converts the signal
supplied from the audio signal output terminal into audio.
[0011]
As described above, the audio switching device according to the present invention is connected
to the first audio signal input terminal connected to the genuine device, the second audio signal
input terminal connected to the non-genuine device, and the genuine vehicle-mounted speaker
And the wired device through the voice switch according to the present invention even if the
genuine on-vehicle speaker does not have the external input / output terminal. By transmission
method, it is possible to add commercially available non-genuine equipment to a genuine invehicle sound system and connect it.
[0012]
Among the signal supplied to the first audio signal input terminal and the signal supplied to the
second audio signal input terminal, only the signal switched by the switching circuit is supplied
to the audio signal output terminal of the audio switch. Even when a non-genuine device is added
to a genuine car sound system and connected, the switching circuit switches the audio signal of
the genuine device and the audio signal of the non-genuine device by the switching circuit, and
only one signal switched is genuine It can be converted to voice at an on-vehicle speaker.
[0013]
Moreover, the audio switching device according to the present invention has an amplifier, and
the amplifier amplifies the signal supplied to the second audio signal input terminal and supplies
the amplified signal to the switching circuit, so that the in-car sound system When a non-genuine
device is connected, the sound quality of the audio signal supplied from the non-genuine device
can be improved and stable reproduction can be performed.
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4
[0014]
In a preferred embodiment of the voice switching device according to the present invention, the
first connector has a terminal shape to which both the first voice signal input terminal and the
genuine on-vehicle electronic device can be connected, and the first voice signal The input
terminal is connected to the genuine on-vehicle electronic device through the first connector.
Also, the second connector has a terminal shape capable of connecting both the audio signal
output terminal and the genuine on-vehicle speaker, and the audio signal output terminal is
connected to the genuine on-vehicle speaker via the second connector .
According to this configuration, even if the genuine device and the genuine on-vehicle speaker
have the audio signal output terminals having a shape different from that of the general-purpose
standard, the audio switching according to the present invention is performed via the first and
second connectors. Devices can be efficiently connected to configure an in-car sound system.
[0015]
In another preferred embodiment according to the present invention, the voice switch further
includes an external controller, and the external controller is connected to the switching circuit
and the amplifier, and performs switching operation from the outside in the switching circuit.
According to the configuration in which the amplification operation of the signal supplied to the
second audio signal input terminal is performed from the outside in the amplifier, switching
between the genuine device and the non-genuine device can be easily performed according to the
user's intention and the non-genuine device It is easy to adjust the volume when using.
[0016]
Other objects, configurations and advantages of the present invention will be described in more
detail with reference to the attached drawings.
The attached drawings are merely exemplary.
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[0017]
As described above, according to the present invention, the following effects can be obtained.
(1) It is possible to provide a voice switching device capable of connecting a non-genuine device
to a genuine in-vehicle sound system, and an in-vehicle sound system using the same. (2) It is
possible to provide an audio switching device capable of improving the sound quality, and an incar sound system using the same.
[0018]
FIG. 1 is a view schematically showing the structure of a voice switch according to an
embodiment of the present invention. FIG. 2 is a diagram schematically showing the operation of
the voice switch shown in FIG. 1 and 2, an audio switching device according to an embodiment of
the present invention includes a first audio signal input terminal 11, a second audio signal input
terminal 12, an audio signal output terminal 13, and an amplifier. 14 and a switching circuit 15.
[0019]
The first audio signal input terminal 11 is a terminal connected to a genuine device (not shown).
That is, the shape, type, standard and the like of the first audio signal input terminal 11 are
design matters determined in accordance with the audio signal output terminal of the genuine
device. For example, when the audio signal output terminal of the genuine device is a general
RCA terminal (pin terminal), the first audio signal input terminal 11 can be a pin jack terminal.
Referring to FIGS. 1 and 2, an audio switch according to an embodiment of the present invention
includes a first connector 16. The first connector 16 has a terminal shape to which both the first
audio signal input terminal 11 and the genuine on-vehicle electronic device can be connected.
The first audio signal input terminal 11 is connected to the first connector 16. Connected to
genuine equipment via
[0020]
The second audio signal input terminal 12 is a terminal connected to a non-genuine device (not
shown), and like the first audio signal input terminal 11, the shape, type, standard, etc. of the
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second audio signal input terminal 12 Can be determined in accordance with the audio signal
output terminal of the non-genuine device.
[0021]
The audio signal output terminal 13 is a terminal connected to a genuine vehicle-mounted
speaker (not shown), and the shape, type, standard, etc. of the audio signal output terminal 13
can be determined according to the audio signal input terminal of the genuine vehicle-mounted
speaker .
Referring to FIGS. 1 and 2, the voice switch according to an embodiment of the present invention
includes a second connector 17. The second connector 17 has a terminal shape capable of
connecting both the audio signal output terminal 13 and the genuine on-vehicle speaker, and the
audio signal output terminal 13 is connected to the genuine on-vehicle speaker via the second
connector 17 Be done.
[0022]
The amplifier 14 is a so-called power amplifier, which amplifies the signal supplied to the second
audio signal input terminal 12 and supplies the amplified signal to the switching circuit 15.
[0023]
The switching circuit 15 switches between the signal supplied to the first audio signal input
terminal 11 and the signal supplied from the amplifier 14, and supplies only the switched one
signal to the audio signal output terminal 13.
[0024]
Further, the voice switch according to an embodiment of the present invention includes an
external controller 18.
The external controller 18 preferably includes an audio signal input changeover switch 181 and
a volume control switch 182.
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The audio signal input switching switch 181 is connected to the switching circuit 15, and the
switching circuit 15 remotely controls the switching of the audio signal by opening and closing
the audio signal input switching switch 181 (see FIGS. 1 and 2). Further, the volume control
switch 182 is connected to the amplifier 14, and the amplifier 14 performs amplification
operation or adjustment of a signal supplied to the second audio signal input terminal 12 from
the outside by opening and closing the volume control switch 182.
[0025]
In the illustrated embodiment, the audio signal input changeover switch 181 is a slide switch,
and the volume control switch 182 is a dial switch, but these are merely examples. For example,
as a type of switch, a suitable mode such as a push switch, a toggle switch, a snap switch, a
rocker switch, a tumbler switch can be selected. Furthermore, the voice switching device can be
configured not to have the external controller 18 by providing a detection circuit that
automatically detects the presence or absence of the power input of the non-genuine device.
[0026]
The above-described voice switch is combined with a genuine device, a non-genuine device, a
genuine in-vehicle speaker, etc. to constitute an in-vehicle sound system. Next, an in-vehicle
sound system using a voice switch according to the present invention will be described. FIG. 3 is
a view schematically showing the structure of an in-vehicle sound system according to an
embodiment of the present invention. FIG. 4 is a diagram schematically showing the operation of
the in-vehicle sound system shown in FIG. In FIGS. 3 and 4, the same components as those shown
in FIGS. 1 and 2 are designated by the same reference numerals.
[0027]
With reference to FIGS. 3 and 4, the in-car sound system according to the embodiment of the
present invention includes the voice switching unit 10 described with reference to FIGS. 1 and 2,
the genuine device 20, and the non-genuine device 30. And a genuine on-vehicle speaker 40.
[0028]
The genuine device 20 is, for example, a genuine on-vehicle audio device such as an FM / AM
radio tuner or a CD / MD player, and is connected to an audio device operation display device or
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8
an in-vehicle power source (not shown). I have configured the system.
[0029]
The sound signal output terminal 21 of the genuine device 20 is connected to the first sound
signal input terminal 11 of the sound switch 10 through the first connector 16.
That is, in the normal genuine in-vehicle sound system, the genuine device 20 has the audio
signal output terminal 21 directly connected to the genuine on-vehicle speaker 40 via the invehicle LAN, but the in-vehicle according to an embodiment of the present invention In the sound
system, the genuine device 20 is such that the audio signal output terminal 21 is connected to
the genuine on-vehicle speaker 40 via the audio switch 10 on a LAN.
[0030]
The non-genuine device 30 is, for example, a commercially available audio visual device such as a
DVD player, a car navigation device with a DVD reproduction function, a TV tuner, etc., and has
at least an audio signal output terminal 32. It is connected to the second audio signal input
terminal 12 of the switch 10.
[0031]
The sound signal input terminal 41 of the genuine car-mounted speaker 40 is connected to the
sound signal output terminal 13 of the sound switch 10 through the second connector 17, and
supplied from the sound signal output terminal 13 to the sound signal input terminal 41.
Converted signal to voice.
[0032]
With regard to the function of the in-car sound system according to one embodiment of the
present invention, referring to FIG. 3, the signal supplied from the audio signal output terminal
21 of the genuine device 20 to the first audio signal input terminal 11 of the audio switch 10.
The reference numeral 210 is supplied to the audio signal output terminal 13 via the switching
circuit 15, and is converted into audio from the genuine vehicle-mounted speaker 40 connected
to the audio signal output terminal 13 and output.
[0033]
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The connection relationship between the genuine device 20 and the genuine on-vehicle speaker
40 shown in FIG. 3 can be switched by the open / close operation of the audio signal input switch
181.
That is, referring to FIG. 4, the signal 320 supplied from the audio signal output terminal 32 of
the non-genuine device 30 to the second audio signal input terminal 12 of the audio switching
device 10 is amplified by the amplifier 14 and By the opening / closing operation of the signal
input changeover switch 181, the signal is supplied to the audio signal output terminal 13 via the
changeover circuit 15, and is converted into audio from the genuine car-mounted speaker 40
connected to the audio signal 13 and output.
[0034]
As mentioned above, since the in-vehicle sound system according to one embodiment of the
present invention includes the voice switch 10 described with reference to FIG. 1 and FIG. Have.
For example, the voice switching device 10 is connected to the first voice signal input terminal
11 connected to the genuine device 20, the second voice signal input terminal 12 connected to
the non-genuine device 30, and the genuine car-mounted speaker 40 The sound switching device
10 according to the present invention can be obtained even if the genuine device 20 constituting
the genuine in-vehicle sound system and the genuine car-mounted speaker 40 do not have an
external input / output terminal. A commercially available non-genuine device 30 can be added
to the genuine in-vehicle sound system and connected by a wired transmission system.
Therefore, unlike the wireless transmission methods as shown in Patent Documents 1 and 2,
stable reproduction can be performed even when a long distance movement is performed in a
car.
Moreover, in the wired transmission system, since the transmission / reception loss such as noise
is small, the sound quality required by the user can be sufficiently satisfied.
[0035]
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10
The signal 210 supplied to the first audio signal input terminal 11 and the signal 320 supplied to
the second audio signal input terminal 12 are switched by the switching circuit 15 and only one
signal is switched. It is supplied to the signal output terminal 13. According to this configuration,
even when the non-genuine device 30 is added to a genuine in-vehicle sound system and
connected, only one signal switched by the switching circuit can be converted to sound in the
genuine on-vehicle speaker 40.
[0036]
Moreover, the audio switching device 10 according to the present invention has the amplifier 14,
which amplifies the signal 320 supplied to the second audio signal input terminal 12 and
supplies the amplified signal 320 to the switching circuit 15. Thus, when the non-genuine device
30 is connected to the in-car sound system, the sound quality of the audio signal 320 supplied
from the non-genuine device 30 can be improved and stable reproduction can be performed.
[0037]
Referring to FIGS. 1 and 2, an in-vehicle sound system according to an embodiment of the
present invention includes a first connector 16 and a second connector 17.
The first connector 16 has a terminal shape to which both the first audio signal input terminal 11
and the audio signal output terminal 21 can be connected. The first audio signal input terminal
11 is a first connector 16. Are connected to the genuine on-vehicle electronic device 20. Further,
the second connector 17 has a terminal shape capable of connecting both the audio signal output
terminal 13 and the audio signal input terminal 41, and the audio signal output terminal 13 is
genuine via the second connector 17. It is connected to the on-vehicle speaker 40. According to
this configuration, even if the genuine device 20 and the genuine on-vehicle speaker 40 have
audio signal input / output terminals having a shape different from that of the general-purpose
standard, through the first and second connectors 16 and 17, The in-vehicle sound system can be
easily configured by efficiently connecting to the voice switching device 10.
[0038]
In another preferred embodiment according to the present invention, the audio switch 10 further
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11
includes an external controller 18, which is connected to the switching circuit 15 and the
amplifier 14, and the switching operation in the switching circuit 15 is performed. Is performed
from the outside, and the amplification operation of the signal 320 supplied to the second audio
signal input terminal 12 in the amplifier 14 is performed from the outside. According to this
configuration, it is possible to easily switch between the audio signal 210 of the genuine device
20 and the audio signal 320 of the non-genuine device 30 according to the user's intention, and
adjust the volume when the non-genuine device 30 is used. It can be done easily by the user's
intention.
[0039]
FIG. 5 is a view schematically showing the structure of an audio switching device according to
another embodiment of the present invention and an in-vehicle sound system using the same. In
FIG. 5, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference
numerals.
[0040]
Unlike the voice switching device 10 described with reference to FIGS. 1 to 4, the voice switching
device 10 shown in FIG. 5 is supplied to the switching circuit 15 because the switching circuit 15
is disposed on the input side of the amplifier 14. It is possible to suppress the signal level of the
audio signal 320 to be reduced, and to reduce the design cost of the switching circuit 15.
[0041]
In the in-vehicle system shown in FIG. 5, in the audio switch 10, two switches are provided in the
switching circuit 15 according to the configuration in which the switching circuit 15 is disposed
on the input side of the amplifier 14. The audio signal 320 and the audio signal 210 of the
genuine device 20 are output to the genuine on-vehicle speaker 40 through different lines.
More specifically, in the connection state shown in FIG. 5, the signal 210 supplied from the audio
signal output terminal 21 to the first audio signal input terminal 11 is a first audio signal output
terminal via the switching circuit 15. It is supplied to 131.
[0042]
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12
Furthermore, the signal 210 supplied to the first audio signal output terminal 131 is supplied to
the genuine on-vehicle speaker 40 via the first audio signal input terminal 411 and converted
into audio.
[0043]
On the other hand, when connection of the non-genuine device 30 is achieved by switching of
the switching circuit 15, the signal 320 supplied from the audio signal output terminal 32 to the
second audio signal input terminal 12 is amplified through the switching circuit 15. 14 and the
signal 320 amplified by the amplifier 14 are supplied to a second audio signal output terminal
132.
[0044]
Furthermore, the signal 320 supplied to the second audio signal output terminal 132 is supplied
to the genuine on-vehicle speaker 40 via the second audio signal input terminal 412 and
converted into audio.
[0045]
Also according to the configuration of the voice switching device 10 described with reference to
FIG. 5 and the in-vehicle sound system using the same, the voice signal 320 of the non-genuine
device 30 and the voice signal 210 of the genuine device 20 can be Alternatively, only one of the
audio signals 210 or 320 can be supplied to the genuine on-vehicle speaker 40.
Therefore, the voice switching device 10 according to the present embodiment and the in-vehicle
sound system using the same have all the advantages described with reference to FIGS. 1 to 4.
[0046]
FIG. 6 is a view schematically showing the structure of an audio switching device according to
still another embodiment of the present invention and an in-vehicle sound system using the
same.
In FIG. 6, the same components as those shown in FIGS. 1 to 5 are denoted by the same reference
09-05-2019
13
numerals.
[0047]
The embodiment shown in FIG. 6 is characterized in that the switching circuit 15 is disposed on
the input side of the amplifier 14 as in FIG. 5, and the attenuator 19 is disposed on the input side
of the switching circuit 15.
According to this configuration, the voice switching device 10 according to the present
embodiment and the in-vehicle sound system using the same have all the advantages described
with reference to FIGS. 1 to 5 and the voice signal 210 of the genuine device 20. By providing
the attenuator 19 in the circuit configuration of the above, the signal level of the audio signal
210 supplied to the switching circuit 15 can be suppressed, and the design cost of the switching
circuit 15 can be reduced.
[0048]
Moreover, since the audio signal 210 of the genuine device 20 is attenuated by the attenuator 19
in advance, the audio signal 210 of the genuine device 20 and the audio signal 320 of the nongenuine device 30 are genuinely transmitted by the same line through the amplifier 14 It can be
supplied to the on-vehicle speaker 40. Therefore, the wiring of the in-vehicle sound system can
be reduced.
[0049]
Although the contents of the present invention have been specifically described with reference to
the preferred embodiments, it is obvious that various modifications can be made by those skilled
in the art based on the basic technical concept and teaching of the present invention. It is.
[0050]
It is a figure which shows typically the structure of the audio | voice switch which concerns on
one Embodiment of this invention.
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14
It is a figure which shows typically operation | movement of the audio | voice switch shown in
FIG. It is a figure showing typically the structure of the in-vehicle sound system concerning one
embodiment of the present invention. It is a figure which shows typically operation | movement
of the in-vehicle sound system shown in FIG. It is a figure which shows typically the structure of
the audio | voice switching device which concerns on another embodiment of this invention, and
an in-vehicle sound system using the same. It is a figure which shows typically the structure of
the audio | voice switching device which concerns on another embodiment of this invention, and
an in-vehicle sound system using the same.
Explanation of sign
[0051]
DESCRIPTION OF SYMBOLS 10 audio | voice switching device 11, 12 1st, 2nd audio | voice
signal input terminal 13 audio | voice signal output terminal 14 amplifier 15 switching circuit
16, 17 1st, 2nd connector 18 external controller 20 genuine device 210 audio | voice signal of
genuine device 30 Non-genuine device 320 Audio signal of non-genuine device 40 Genuine car
speaker
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