close

Вход

Забыли?

вход по аккаунту

?

JPH0923493

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0923493
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
microphone such as, for example, a hand-type microphone.
[0002]
2. Description of the Related Art Conventionally, in a hand type microphone as described above, a
microphone unit is provided in a housing, and a current, which is an audio signal collected by the
microphone unit, is received via a cable derived from the housing. There was something to
supply the power amplifier outside the body.
[0003]
However, in such a hand type microphone, the current (audio signal) flowing through the cable is
very weak, so it is susceptible to inductive noise and amplified by the power amplifier, When the
output is performed, there is a problem that the induction noise is mixed.
It is an object of the present invention to provide a microphone that is less susceptible to induced
noise.
[0004]
01-05-2019
1
SUMMARY OF THE INVENTION In order to solve the above problems, according to the present
invention, a housing, a microphone unit provided in the housing, and a housing provided in the
housing and from the microphone unit are provided. An amplification means for amplifying a
signal, and a cable connected to an output side of the amplification means and a power supply
terminal of the amplification means are provided.
[0005]
In the present invention, the cable may be a single cable incorporating a plurality of transmission
lines respectively connected to the output side and the power supply terminal of the
amplification means.
[0006]
According to the present invention, the audio signal picked up by the microphone unit is
amplified by the amplifying means provided in the housing, and then the amplified audio signal
is amplified by connecting to, for example, a speaker via a cable. be able to.
Also, by connecting this cable to a power supply, the amplification means in the housing can be
operated.
[0007]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present
invention is shown in FIGS.
The microphone of this embodiment has a housing 2 which comprises a front wall 2a and a rear
wall 2b as shown in FIG. 2. For example, at least the rear wall 2b is die-cast by aluminum. The
[0008]
In the housing 2, a microphone unit 4 is provided, and positive and negative output terminals of
the microphone unit 4 are connected to both ends of the variable resistor 6. The slider of this
01-05-2019
2
variable resistor 6 is connected to the amplification means, for example, the input side of the
power amplifier 8.
[0009]
The output side of the amplifier 8 and the negative terminal of the microphone unit 4 are
connected to a pair of signal lines 12 a and 12 b in one cable 10 led to the outside from the
housing 2, these signal lines It is connected to the connector, for example, the pin contacts 14a
and 14b of the connector 14 via 12a and 12b. Further, among the positive and negative power
terminals of the power amplifier 8, the positive power terminal is connected through the switch
16 to the connector 14 through the power line 18 a of the pair of power lines 18 a and 18 b in
one cable 10. Is connected to the pin contact 14c of Further, the negative power supply terminal
of the power amplifier 8 is connected to the pin contact 14d of the connector 14 through the
power supply line 18b.
[0010]
The rear wall 2 b of the housing 2 is made of aluminum die-cast, so that it is used as a heat sink
of the power amplifier 8.
[0011]
In the microphone thus configured, when the connector 14 is connected to another connector as
described later and the open / close switch 16 is closed, the power amplifier 8 is connected via
the pin contacts 14c and 14d of the connector 14 and the power supply lines 18a and 18b.
Power is supplied, and the power amplifier 8 operates.
In this state, when the microphone unit 4 picks up sound, the sound signal is adjusted in volume
by the variable resistor 6 and then amplified by the power amplifier 8 to a level higher than that
of the sound signal, and the signal lines 12a and 12b The voltage is supplied to the pin contacts
14a and 14b of the connector 14 through this. At this time, the audio signal amplified by the
cable 10 is transmitted from the housing 2, but the level thereof is considerably larger than the
audio signal as picked up by the microphone unit 4, and thus the signal line 12 a, 12 b is
induced. Even if noise occurs, it is hardly affected. In particular, even if the signal lines 12a and
12b and the power supply lines 18a and 18b are mixed in the cable 10 and are easily influenced
by the induction noise, they are hardly influenced by the induction noise.
01-05-2019
3
[0012]
Such a microphone can be used in various ways. For example, as shown in FIG. 3, when used as a
microphone of a vehicle-mounted loudspeaker, a trumpet-type speaker 20 is attached to the roof
of a car and the battery 22 and the speaker 20 attached to the car are connected to the
connector 14 The four receptacle contacts of another possible connector 24 may be connected,
the microphone may be placed in the car, and the connectors 14, 24 may be connected.
[0013]
In general, a vehicle interior stereo device or the like is attached in advance to a dashboard or the
like in a car, and it is often difficult to secure a space for newly installing an amplifier for the
speaker 20. However, in this microphone, since the power amplifier 8 is incorporated in the
housing 2, it is only necessary to secure the installation space of the microphone in the car, so
installation can be easily performed.
[0014]
Moreover, as shown in FIG. 4, it can also be used as a microphone of a portable megaphone. In
this case, the main body 26 of the megaphone is provided with only the battery for the power
amplifier 8 in the housing 2 of the microphone without providing the amplifier. A connector 28
connectable to the connector 14 is provided on the rear surface of the main body 26 or the like.
Of course, this connector 28 is connected to the positive and negative electrodes of the battery
for the power amplifier 8 and the two input terminals of the loudspeaker of the megaphone. In
FIG. 4, reference numeral 30 denotes a handle, and reference numeral 32 denotes a shoulder
belt.
[0015]
In general, portable megaphones are often used in a crowded manner, and the main body of the
megaphone is susceptible to an impact from falling or the like. Therefore, when an amplifier is
built in the megaphone body, the printed circuit board of the amplifier is easily damaged.
01-05-2019
4
However, when this microphone is used, the power amplifier 8 is provided in the housing 2 of
the microphone, and there is no need to provide the microphone in the megaphone main body,
so even if the megaphone main body falls, it is broken in the megaphone main body There is no
easy thing to do. Moreover, since the microphone itself in which the power amplifier 8 is built in
is used by the user holding it by hand, it is less likely to drop, and it is less likely to receive a
large impact, and the substrate of the built-in power amplifier 8 is It is hard to cause damage
such as.
[0016]
This microphone can also be used with box-type speakers 34, 36, as shown in FIGS. In the case of
FIG. 5, in addition to the box-type speaker 34, a speaker connector / DC power supply 38 is
prepared. The speaker connector / DC power supply device 38 rectifies and smoothes AC power
and converts it into DC, and is provided with a connection terminal to the speaker 34. The
speaker connection terminal and the positive and negative terminals of the DC power are speaker
connector and DC power It is connected to a connector 40 provided in the device 38. The
connector 14 of this microphone is connected to this connector 40. As a result, operating power
is supplied from the DC power supply device to the power amplifier 8 of the microphone, and the
amplified output from the power amplifier 8 is supplied from the connector 40 to the box-type
speaker 34.
[0017]
In the case of FIG. 6, the box-type speaker 36 is internally provided with a DC power supply that
rectifies and smooths an AC power supply to convert it into DC. Furthermore, by providing the
connector 42 connected to the positive and negative electrodes of the DC power supply and the
two input terminals of the speaker on the side wall of the box type speaker 36 and connecting
the connector 14 of the microphone to this connector 42 Power is supplied to the power
amplifier 8, and the output from the power amplifier 8 is supplied to the speaker 36. The
combination of the box-type speaker 36 and the microphone can be used, for example, as a
simplified calling device.
[0018]
In the above embodiment, the cable 10 is directly pulled out from the housing 2. However, for
01-05-2019
5
example, the housing 2 is provided with a connector similar to the connector 28 shown in FIG.
The connectors may be connected to each other. Further, in the above embodiment, the pair of
signal lines 12a and 12b and the pair of power supply lines 18a and 18b are provided in one
cable 10. However, they may be separate cables. Moreover, in the above-mentioned embodiment,
although the connector 14 shall have a pin contact, it can also be set as a connector which has a
receptacle contact.
[0019]
As described above, according to the first aspect of the present invention, the amplifying means
is provided in the housing of the microphone, and the audio signal amplified by the amplifying
means is output through the cable. Even if inductive noise is induced in the cable, the signal-tonoise ratio can be improved with almost no influence. According to the second aspect of the
present invention, the transmission of the operating power of the amplification means and the
transmission of the amplified audio signal are performed by one cable. Therefore, wiring can be
performed simply by connecting this single cable to the speaker or the power supply. If
transmission of operating power and transmission of amplified audio signals are performed with
one cable, the audio signals may be affected by power supply noise, but since the audio signals
are amplified, There is almost no impact.
[0020]
Brief description of the drawings
[0021]
1 is a circuit diagram of one embodiment of a microphone according to the present invention.
[0022]
2 is a perspective view of the same embodiment.
[0023]
3 is a schematic configuration diagram in the case where the microphone of the same
embodiment is used as a microphone of a vehicle-mounted loudspeaker.
[0024]
01-05-2019
6
4 is a schematic configuration diagram when using the microphone of the same embodiment as a
microphone of a portable megaphone.
[0025]
5 is a schematic configuration diagram when using the microphone of the same embodiment
with a box type speaker.
[0026]
6 is a schematic configuration diagram when using the microphone of the same embodiment
with a box type speaker different from FIG.
[0027]
Explanation of sign
[0028]
4 microphone unit 8 power amplifier (amplifying means) 10 cable
01-05-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
jph0923493
1/--страниц
Пожаловаться на содержимое документа