JPS5910830Y2 - microphone - Google Patents

Description

[Detailed description of the invention] This invention relates to microphones, and in particular can be used as a built-in microphone by plugging into a socket, as well as a cord microphone,
This invention relates to a microphone that can be used as a wireless microphone and a wireless transmitter.

Cord microphones and wireless microphones are improved versions of regular microphones that function as built-in microphones by plugging them into equipment such as radio receivers and tape recorders, and can be used as wireless microphones by removing them from the equipment. Various types of microphones are available that can also be used as wireless transmitters by connecting an attachment to the microphone.

The present invention also relates to a microphone that can be used for multiple purposes.The microphone body is equipped with a microphone unit, a wireless transmission amplifier, and an oscillation circuit.By attaching the microphone body to the device used, it functions as a built-in microphone, and can be connected to a socket with a connection cord. By connecting the microphone itself, it works as a wireless microphone. In that state, by connecting the connection cord to the microphone input terminal of the device being used, it functions as a cord microphone. Furthermore, by changing the connection position of the socket, the connection cord can be connected to the external speaker terminal of the device being used. The present invention provides a microphone that can also be used as a wireless transmitter by connecting to a wireless transmitter.

Hereinafter, an embodiment of the present invention shown in the drawings will be described.

FIG. 1 is a diagram showing the microphone main body 11, and the condenser microphone 12 (in FIG. 1, the microphone main body 1
1) and a slide switch 13 for turning on and off the power for the wireless microphone and wireless transmission.
, and a jack 1 having four terminals IA, 2A, 3A, and 4A of the circuit shown in FIG. 4 built into this main body 11.
4 is provided.

FIG. 2 shows the microphone mounting part of a device used such as a radio receiver or tape recorder into which the microphone body 11 described above is inserted, and is connected to the four terminals IA, 2A, 3A, and 4A of the microphone body 11. A first socket 15 having four terminals IB, 2B, 3B, 4B is pivotally attached to the device 16 used.

The terminal 1B of the first socket 15 is connected to the ground circuit (
(not shown), and terminal 2B is connected to an amplifier circuit (not shown) of the equipment used, and terminals 3B and 4C are connected to
are each open.

This first socket 15 is provided with a cover member 17 that holds the microphone body 11.
An opening 18 is provided so that when the microphone main body 11 is inserted into the main body, the condenser microphone 12 of the main body is exposed.

By inserting the microphone body 11 into the first socket 15 so that the condenser microphone 12 is exposed through the opening 18, the terminal of the microphone body 11 and the first socket 1 are connected.
5 terminals are 1A and IB, 2A and 2B, 3A and 3B, 4A
and 4B are connected respectively.

When the microphone main body 11 is inserted into the first socket 15, the cover member 17 that contacts the slide switch 13 of the microphone main body 11 is provided with a protrusion 19 that engages with the slide switch 13. Switch to .

FIG. 3 is a diagram showing the second socket 22 with a plug 21 attached to one end of the cord 20 for connection to the microphone input terminal and external speaker terminal (both not shown) of the device 16 used, and has four terminals IC, Among 2C, 3C, and 4C, terminals 1C and 4C are short-circuited via a first resistor for attenuation (not shown), terminal 2C is connected to the core wire of cord 20, and terminal 3C is connected to its shield wire. ing.

FIG. 4 is a circuit diagram showing an electric circuit built into the microphone body 11. The output side of the amplifier circuit 23 of the condenser microphone 12 is connected to the wireless microphone and the amplifier for wireless transmission via the second resistor R2 for attenuation. and is connected to the input side of the oscillation circuit 24.

The output side of the amplifier and oscillation circuit 24 is connected to the terminal 1A, and the second
The output side of resistor R2 is connected to terminal 2A.

Terminal 1A is also directly connected to terminal 3A, and terminal 2A
is connected to the terminal 4A via the third resistor & for attenuation.

25 is a power supply battery for the condenser microphone 12 and the amplifier and oscillation circuit 24, and the circuit 24 is equipped with a switch 1.
Connected via 3.

26 is an oscillation coil, the primary winding L1 is an oscillation winding connected to the oscillation circuit 24, and the secondary winding L2 has one end grounded and the other end connected to the terminal 1A.

Next, the operation of this embodiment will be explained.

First, a case will be described in which the microphone main body 11 is inserted into the first socket 15 of the device 16 to be used as a built-in microphone.

By inserting the microphone main body 11 into the first socket 15 with the condenser microphone 12 facing outward, the terminals of the microphone main body 11 and the first socket 15 are 1A, IB, 2A, 2B, and 3A, as described above. and 3
B and are connected like 4A and 4B,
The protrusion 19 on the cover member 17 turns the slide switch 13 off as shown in FIG.

Therefore, the condenser microphone 12 of the microphone body 11
The output is sent from terminal 2A to device 1 via second resistor R2.
6 is applied to the terminal 2B of the first socket 15, and is amplified by the amplifier circuit of the device 16 used.

In addition, the ground circuit on the side of the microphone body is a path from the terminal 1A to the ground via the secondary winding L2 of the oscillation coil 26. In this case, the secondary winding L2 is a high frequency coil (for FM modulation). (oscillation coil), there is almost no load on low frequencies and there is no effect.

Therefore, terminal 1A is equivalently connected to ground.

Also, the ground side is from terminal 1A to terminal 1B of the first socket 15.
and connected to the ground circuit of the equipment used.

Next, a case will be described in which the microphone main body 11 is removed from the first socket 15 and inserted into the second socket 22 to be used as a cord microphone.

The four terminals IC, 2C, 3C, 4C of the second socket 22 are connected to the terminals IA, 2A, 3A, 4A of the microphone main body 11.
Insert them so that they are connected to each other.

Then, the power switch 13 is turned off and the plug 21 is inserted into the microphone input terminal of the device 16 used.

Therefore, the output of the condenser microphone 12 is applied from the terminal 2A to the terminal 2C of the second socket 22 via the second resistor R2, through the core wire of the cord 20, and to the amplifier circuit of the equipment 16 used.

Further, the ground circuit on the side of the microphone body is connected to the ground circuit of the device 16 in use by the shielded wire of the cord 20 through the terminals 1A to 3A and the terminal 3C of the second socket 22, as in the case of the built-in microphone described above.

Next, in this state, if the plug 21 of the second socket 22 is removed from the microphone input terminal of the device being used, the device can be used as a wireless microphone.

That is, as mentioned above, a load is applied between the output side of the amplifier circuit 23 of the condenser microphone and the ground by the first and third resistors, but by removing the plug 21, the terminals 2C and 3C are opened. The output of the condenser microphone 12 does not appear on the third resistor R3 side.

The output of the microphone 12 is connected to a wireless amplifier and an amplifier and oscillation circuit 2 for wireless transmission via a second resistor R2.
4 as a modulation signal, and from the terminal 1A to the terminal 3A to the terminal 3C of the second socket 22 via the oscillation coil 26.
The signal is transmitted through the shielded wire of the cord 20 as an antenna.

In this case, the power switch 13 can of course be turned on manually.

Next, the case of wireless transmission will be explained.

First, switch 13 is turned on in the same way as when using a wireless microphone, and the microphone main body 11 and second socket 21 are connected to terminals 1A and 3C, 2A and 4C, 3A and 1C, and 4A and 20. Insert it as shown.

Then, by inserting the plug 21 into the external speaker terminal of the device being used, the signal appearing on the external speaker terminal is transferred to the third
Amplifier and oscillation circuit 24 via a resistor-based attenuation circuit
added to the human power side of

Therefore, the output of the amplifier and oscillation circuit 24 is transmitted through the oscillation coil 26, the terminal 1A, the terminal 3C of the second socket 21, and the shielded wire of the cord 20.

As described above, the microphone of the present invention has a microphone unit, an amplifier for wireless transmission, and a transmitting circuit inside the microphone body, and also outputs a microphone output, a wireless microphone or wireless transmission output, and a ground terminal. A socket that can be connected to the terminal is provided on the equipment used, and when each terminal is connected to the equipment used, it functions as a normal built-in microphone.A separate socket with a cord that can be connected and used as an antenna is provided, and the terminal of this socket is installed. By connecting the terminal on the microphone body to the microphone, it can function as a corded microphone, wireless microphone, or for wireless transmission.

Further, as described above, the microphone of the present invention has a simple structure, and its operation is as simple as inserting the microphone body into either of two sockets, and it can be provided in a small size and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the microphone main body according to an embodiment of the present invention, Fig. 2 is a perspective view showing the integration of the microphone main body into the equipment used, Fig. 3 is a perspective view showing the second socket, and Fig. 4 is an electrical circuit diagram inside the microphone body. DESCRIPTION OF SYMBOLS 11... Microphone body, 12... Condenser microphone, 15... First socket, 16... Equipment used, 20... Cord, 21... Plug, 22... Second socket, IA , 2A, 3A, 4A,
IB, 2B, 3B, 4B, IC,
2C, 3C, 4C...terminals.

Claims (1)

[Scope of utility model registration request] A microphone unit, an amplifier for wireless transmission, an oscillation circuit, and an oscillation coil having a primary winding connected to the oscillation circuit and a secondary winding whose one end is grounded are built in, and the oscillation coil is connected to the output end of the microphone unit. a microphone body having a first terminal, a second terminal connected to the other end of the secondary winding of the oscillation coil, and a third terminal connected to the first terminal via a resistor; a first socket having a signal input terminal connected to the first terminal and a ground terminal connected to the second terminal; a plug connectable to an input terminal or an output terminal of a device to be used is attached to one end; A cord is provided with a second removable socket attached to each terminal of the microphone main body at the end thereof, and by connecting the microphone main body to the first socket, it operates as a built-in microphone of the device to be used. When connecting the cord, connect the second socket so that the first terminal of the microphone body corresponds to the core wire of the cord and the second terminal corresponds to the shield wire, and connect the plug of the cord to the device used. By connecting the microphone to the human power terminal, it operates as a cord microphone, and in this state, the core wire and shield wire of the cord are opened by removing the plug from the microphone input terminal of the device being used and operating the amplifier and oscillation circuit. The plug of the cord is connected to the output terminal of the device used, the core wire of the cord is connected to the third terminal, and the shield wire is connected to the second terminal. A microphone characterized in that by connecting the second socket to the microphone main body, wireless transmission can be performed using the shielded wire of the cord as a transmitting antenna.