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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing an embodiment of
the microphone device of the present invention. 11 · · · Microphone, 12, 14 ... Jack, 120, 141 ...
Movable contact, 122, 142 ... Fixed contact, 123, 143 ... Receiving ridge 13 ... RF section, 15 · · ·・
Transistor, 16: Switch, 17: Battery, R1: Bias resistance. 27
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a microphone device. There is a two-in-one type microphone device used as wireless or wire P
as known. That is to say, wired wiring is used for convenience by connecting to a microphone
and an audio device 14 equipped with an amplifier, and the wireless connection is not included
in the connecting wire from the high-grow wave transmitting unit incorporated in the
microphone device. When using wirelessly in a two-way microphone device that is used to send
radio waves to an acoustic lateral installation equipped with a receiver f via an antenna, the high
frequency transmission unit is electrically powered to A small cell battery is required to deliver
the The burden of battery consumption in this field of wireless communication is compared with
the battery consumption of 41 h of impedance conversion type microphones such as commonly
used condenser microphones and batteries used as a bias power source, ie pure consumption of
only the microphone part Reaches about 10 times. However, in the prior art, in general,
switching from wired to wireless use is performed by disconnecting the microphone between the
microphone unit and the above-mentioned Acoustics II, and connecting an antenna to the
antenna terminal, but after use It is necessary to remove the antenna and switch off the battery.
This is for the purpose of preventing the battery consumption, but often there is a drawback that
often the user removes the antenna and forgets to turn off the battery, which accelerates the
battery consumption. The present invention has been made in view of the above-mentioned
points, and the battery tti! th? A microphone device t-providing to make it easy to handle,
simplify handling, and prevent wasteful consumption of the battery extremely well, and is aimed
at ft target 0 or less e! ! The details will be described in detail by reference to the J-plane
according to the present invention. That is, in the figure, reference numeral 11 denotes a
microphone, and the output end of this microphone is connected to the first jack 120 scanning
point 121 whose receiving port 123 is grounded. The output terminal of the RF unit 13 is
connected to the receiving port 143 of the second jack 14. The fixed point contact 142 of the
second shak 14 is grounded, and the movable contact 141 is connected to the base electrode of
the switching transistor 15. The emitter terminal of the transistor 15 and the power terminal of
the rimiti RF unit 13 are 11!
Further, a bias resistor R8 is connected between the base and the collector '@ pole, and a
collector 17 is connected via the switch 16 to the pond 17 whose one end is grounded. Also, the
power supply line of the microphone 1 is connected via the power distribution switch 161f from
this power supply no. Next, the operation of the microphone device configured as described
above will be described. First, when using for convenience by wired connection, the other end of
the connection cord (not shown) whose one end is connected to the microphone connection
insulator of the audio equipment is connected to the jack 12 of @ 1. Insert plug and connect.
Subsequently, when the switch 16 is closed, the voice converted into an electric signal by the
microphone 1 is connected to the center conductor of the other end plug of the connection cord
(not shown) through the town working point 121 of the jack 12 of ggl Are led to the sound
equipment. At this time, the fixed contact 122 of the first jack 12 is led to the RF unit 13 because
the connection with the ] il + contact 121 is released by inserting and connecting the other end
plug of the connection cord (not shown). At this time, no plug is connected to the second jack 14,
and the 0T point 141 is grounded via the fixed contact 142, and the transistor 15 is not
produced. The voltage from the electricity 17 is not supplied, and the kcF unit 13 does not
operate. In addition, when using wirelessly, remove the illustrated i removal code y that is
connected to the second note shack 12 and use a short end that is not shown in the figure on the
second shack 14 Insert and connect the other end plug of the antenna 巌. At this time, if the
switch 16 is closed, the output from the voice converted to an electric signal by the microphone
11 is the movable contact 121 of the first jack 12, li! It is transmitted to the RIP @ 130 input unit
via the i1 foot contact point 122. (In other words, this is because the plug is not inserted and
connected to the 41 shak 12 at this time, so the movable contact 121 and the fixed contact 122
are in the shape of a deformed tumor. ) While this one! The other end of the antenna wire is
connected to the second jack 14 so that the contact between the il quality factor 141 and the
fixed contact 142 is released, so that the transistor 5 is forward biased and becomes conductive.
When the voltage of 11 is supplied to the power supply terminal of the RF 'unit 13, the RF unit
13 is put into operation. Therefore, the signal guided to the input end of the RF unit 13 is ^ frequency modulated such as normal frequency modulation so as to be suitable for transmission
as a radio wave and is led out from the output end and led to the receptacle 143 of the sense 2
jack 14 .
Here, the antenna inserted and connected to the second shak 14 is connected to the outer
conductor of the plug, so the transmission radio wave guided to the receiving port 143 is
radiated to the air via the antenna rod, and the radio wave is transmitted It is received and
amplified and reproduced by a not-shown sound recording device provided with a receiving unit.
After using this wirelessly, remove the antenna よ り from the second jack 14, and even if you
forget to turn off the switch 16, the switching transistor 5 at will be used as described in the
meeting used with the wire y. Since the voltage from the RF unit 131C battery 17 is not supplied,
the RF unit 13 is not in operation and the battery is not wasted. The present invention is not
limited to the fc embodiment described above, and various modifications can be made without
changing the gist of the uninvention. In the case of the impedance conversion type in which the
microphone requires a bias power supply has been described in the example of II, the
microphone of the electromotive force conversion type can omit the connection of the battery
and the microphone without requiring the bias power supply. Therefore, in this case, the battery
is required only in the case of wireless driving the RF unit, and as described above, according to
the present invention, the battery can be connected and disconnected by disconnection and
connection of the antenna wire. In the above embodiment, the so-called two-in-one system
microphone device having wired and wireless functions has been described, but the first Shack
12 is omitted and the output of the microphone is directly connected to the input portion of RfP
@ 13. According to the present invention, it is also possible to make a microphone device of only
one wireless system only if wireless communication is performed. According to the present
invention, the disconnection of the ringing antenna wire used wirelessly, The ability to disconnect
the battery makes it easier to treat the castle and 1 can prevent wasteful consumption of the
battery very well. Wax can provide Kurohon device