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DESCRIPTION JPS5242008

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DESCRIPTION JPS5242008
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a conventional
microphone device, FIG. 2 is a circuit diagram of a conventional microphone device, and FIG. 3 is
a circuit diagram of an embodiment of the present invention. symbol. 1 ... Microphone. 2 ... Power
supply battery, 3 ... Transmission circuit, 4 ... Antenna, 5 ... Jack, 6 ... Tape recorder with radio.
DESCRIPTION OF SYMBOLS 7 ... insertion plug, 13 ... output and power supply terminal, 14 ...
movable contact piece, 15 ... fixed contact, 17 ... main contact, 18 ... earth contact, 19 ... · Earth
terminal, 20 · · · power terminal, 22 · · · manual terminal. Fig. 1-17-Japanese Utility Model
Application No. 52-42008 (2) False Fig. 2 Fig. 3-18-
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wireless
microphone device attached to audio equipment such as a tape recorder with radio W4. A
conventional device of this type will be described with reference to FIG. 1. 1 is a 3-wire
microphone, 2 is a power supply battery of the entire microphone device, 3 is a transmission
circuit, 41-is an antenna, 5 is a tape recorder 6 with a radio The output terminal 8 of the
microphone 1 is connected to the input terminal 10 of the transmission circuit 6 through the
capacitor 9 and the jack 5 in a jack into which the plug 7 is inserted. The power supply terminal
11 of the ink 1 is directly connected to the power supply battery 2, and the transmission circuit 3
is connected to the power supply battery 2 through the switch 12. When using the output of the
microphone 1 for transmission, turn on the switch 12. When supplying the output of the
microphone 1 to the tape recorder 6 with radio, insert the insertion plaque 7 into the / Yanok 5
with the switch 12 open. . In this circuit, although the supply of power to the transmission circuit
3 is controlled by the switch 12, since the current of the power supply battery 2 constantly flows
in the microphone 1, the consumption of the battery 4 is large. In order to eliminate the
consumption of the power supply battery, another switch is required in the power supply circuit
of the memory. FIG. 2 shows an embodiment of the present invention, in which another powersupply circuit in addition to the jack 5 for taking out the audio output is provided in the power
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supply circuit of the microphone 1, and this jack. 2. Supply power from the tape recorder 6 with
radio to the rack 2 4. That is, in the circuit of FIG. 1, only one jack 5 for extracting the audio
output is required, but the consumption of the power supply battery is large, and in the circuit of
FIG. The jack and jack for power supply and two jacks are required. The object of the present
invention is to simplify the structure by simultaneously extracting the audio output and
supplying the power to the wireless microphone by using one jack, and at the same time to
eliminate the consumption of the power supply battery. The embodiment will be described below
with reference to FIG. 1 is a two-wire microphone, 2 is a power supply battery of the
transmission circuit 3, 4 is an antenna, and 5 is a jack for inserting the insertion plug 7 left of the
tape recorder 6 with a radio. The output and power supply terminal 13 of the microphone 1 is
connected to the movable contact piece 14 of the jack 5, and the identification contact 15 with
which the movable contact piece 14 is always in contact is connected to the input terminal 1 o of
the transmission circuit 5 via the capacitor 9. ing. A switch 12 connected in series to the power
supply battery 2 is turned on only at the time of transmission, and supplies' ttLii 1 N 3-to the
microphone 1 and the transmission circuit 6.
The resistor 16 doubles as the resistor of the power supply circuit of the microphone 1 and the
load resistor of the audio signal. The insertion plug 7 of the tape recorder 6 with a radio has a
main contact 17 and an earth contact 18. When this is inserted into the jack 5, the main contact
17 contacts the movable contact 14 and the movable contact 14 is a fixed contact A ground
contact 18 remote from 15 contacts the ground terminal 19 of the jack 5 to connect between the
two grounds. When the main contact 17 is connected to the power supply terminal 20 of the
tape recorder t with radio via the resistor 21, the main contact 17 is connected to the audio
signal input terminal 22 via the capacitor 26. Next, the operation will be described. When this
device is used as a transmission microphone, the insertion plug 7 of the tape recorder with radio
6 is removed from the jack 5, and when the switch 12 is turned on, power is supplied to the
microphone 1 and transmission circuit 3 from the power supply battery 2. The movable contact
piece 14 and the fixed contact 15 of the audio current jack 5 of the microphone 1 pass through
the transmission circuit 3 and are radiated from the antenna 4. When the output of the
microphone 1 is supplied to the tape recorder 6 with a radio, the switch 12 is opened, and the
inserted plug 2-4 is inserted into the jack 5. The microphone 1 is supplied with power from the
power supply 20 of the tape recorder 6 with a radio via the resistor 21, the main contact 17 and
the movable contact piece 14, and the output of the microphone 1 passes through the same path
and sounds via the capacitor 26. It is supplied to the signal input terminal 22. As described
above, the device of the present invention uses a two-wire microphone, and by superimposing
the audio current and the power supply current for the microphone, it becomes possible to use
the microphone with one wire and one jack, as shown in FIG. Since the power supply battery is
not consumed as in the conventional circuit and there is no need to use two jacks as in the
conventional circuit of FIG. 2, it is excellent in economy of use and simplification of the
apparatus. Effect.
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