CN2753088Y

CN2753088Y - Radio remote control megaphone

Info

Publication number: CN2753088Y
Application number: CN200420052299.7U
Authority: CN
Inventors: 张立安; 薛军; 张涛; 孙勇昌
Original assignee: 张涛
Priority date: 2004-07-16
Filing date: 2004-07-16
Publication date: 2006-01-18
Anticipated expiration: 2014-07-16

Abstract

The utility model discloses a wireless remote control loudspeaker, which belongs to the field of loudspeaker devices. The purpose of the device is to solve the problems that the existing loudspeaker must be used with wires, and the operating place is fixed. Its structure is composed of a power supply circuit A, a power amplifier circuit B, and a walkie-talkie receiver C, wherein the power supply circuit A, power amplifier circuit B, and walkie-talkie receiver C are connected in pairs. Compared with the prior art, the wireless remote control loudspeaker of the utility model has the characteristics of no need for wires when in use, and the broadcaster can use the walkie-talkie to operate anytime and anywhere, and is suitable for being used in the broadcasting business of vast rural areas and factories, mines, enterprises and institutions. Very good promotion and application value.

Description

The wireless remote control sound amplifier

Technical field

The utility model relates to a kind of public address set, especially a kind of wireless remote control sound amplifier that can use by wireless signal transmitting device remote controls such as intercoms.

Background technology

Sound amplifier of the prior art is wired sound amplifier, and sound amplifier must be placed on the studio with voice-input device (as microphone etc.), and with electric wire sound amplifier is joined with audio amplifier that is placed on places such as square or loudspeaker and just can use.So just need long electric wire in outdoor introducing studio, both increase the difficulty when installing, and bury hidden danger for again the use under the thunder and lightning weather.In addition, because between sound amplifier and the voice-input device also is wired connection, and be placed in the studio simultaneously, so, the broadcasting personnel want by broadcast distribution message, and no matter at that time where it is in, just can carry out after all must getting back to the studio, both be unfavorable for the timely issue of message, and brought many inconvenience for again the broadcasting personnel.

Summary of the invention

In order to overcome the deficiency of existing sound amplifier, the utility model provides a kind of wireless remote control sound amplifier, and having of this wireless remote control sound amplifier be simple in structure, can utilize wireless speech sender units such as intercom to carry out characteristics such as radio broadcasting control.

The technical scheme that its technical problem that solves the utility model adopts is: the wireless remote control sound amplifier, constitute by power circuit A, power amplifier B, intercom receiver C, and power circuit A, power amplifier B, intercom receiver C join in twos, wherein,

Power circuit A is by capacitor C 8-C10, relay J, relay switch JK, transformer B1, diode D1, D2, rectifier ZL1, integrated regulator U3 constitutes, the external 220V power supply of first polar curve circle L3 of transformer B1, secondary coil L1, diode D2, D1 is connected in series successively and forms the loop, the intermediate contact of diode D1 and D2 joins by capacitor C 10 and ground wire, the intermediate contact of diode D1 and D2 also joins by 5 pin of the integrated amplifier U2 among relay switch JK and the power amplifier B, relay J is serially connected between ground wire and the intercom receiver C, the two ends of the secondary coil L2 of transformer B1 join with 1 pin and 3 pin of rectifier ZL1 respectively, 2 pin and the ground wire of rectifier ZL1 join, 1 pin of 4 pin and integrated regulator U3 joins, 2 pin of integrated regulator U3 and intercom receiver C+the 8V power input joins, 3 pin and ground wire join, capacitor C 8 is serially connected between 2 pin and 3 pin of integrated regulator U3, and capacitor C 9 is serially connected between 1 pin and 3 pin of integrated regulator U3;

Power amplifier B is by resistance R 1-R12, capacitor C 1-C7, integrated amplifier U1, U2 constitutes, resistance R 1 is serially connected between the signal input part IN1 and IN2 of power amplifier, signal input part IN2 and ground wire join, resistance R 2, R4 is serially connected between 5 pin of ground wire and integrated amplifier U1,1 pin of integrated amplifier U1 joins with signal input part IN1 by capacitor C 1,2 pin are by capacitor C 2, resistance R 6 is joined with ground wire, 3 pin directly and ground wire join, 4 pin and loudspeaker output Uot1 join, 5 pin of 5 pin and integrated amplifier U2 join, capacitor C 3, C4 is attempted by between 5 pin and ground wire of integrated amplifier U1, resistance R 7 is serially connected between 4 pin of capacitor C 2 and integrated amplifier U1, resistance R 3, R5 is serially connected between 1 pin of 1 pin of integrated amplifier U1 and integrated amplifier U2, resistance R 2, the intermediate contact of R4 and resistance R 3, the intermediate contact of R5 joins, capacitor C 5, resistance R 8 is serially connected between 4 pin and ground wire of integrated amplifier U1, the 2 pin serial connection capacitor C 7 of integrated amplifier U2, resistance R 10 backs join with 4 pin of integrated amplifier U2,4 pin also join with loudspeaker output Uot2,3 pin and ground wire join, one end of resistance R 11 and 4 pin of integrated amplifier U1 join, the intermediate contact of the other end and capacitor C 7 and resistance R 10 joins, resistance R 12 is serially connected between capacitor C 7 and the ground wire, capacitor C 6, resistance R 9 is serially connected between 4 pin and ground wire of integrated amplifier U2;

Signal output part Uot3, the Uot4 of intercom receiver C joins with signal input part IN1 and the IN2 of power amplifier B respectively, and power supply input negative pole and ground wire join.

Utilize intercom receiver C to receive the voice signal that intercom etc. is launched, and this signal is converted into electrical signal transfer gives power amplifier B, power amplifier B handles signal and amplifies and output.Power circuit A is converted into 30V and the output of 8V voltage with the 220V voltage of input, and 30V is output as power amplifier B power supply, and 8V is output as intercom receiver C power supply.

During use in the process, the control signal of utilizing intercom receiver C to send is controlled the relay among the power circuit A: when intercom receiver C does not receive voice signal at ordinary times, relay switch among the power circuit A is in normally open, power amplifier B is not powered; When intercom receiver C receives voice signal, can send control signal, the relay coil conducting, the relay switch closure, power amplifier B starts working.

In addition, in use, carry out the voice transmission, can also go up at other audio playing apparatus (as: recorder, CD player) and add audio emitting device, so just can utilize sound amplifier to play news or music except utilizing intercom.

Wireless remote control sound amplifier of the present utility model is compared with prior art has following outstanding beneficial effect:

(1) can be connected ground such as also together being arranged on outdoor square with audio amplifier or loudspeaker, need not stringing, stop the potential safety hazard that thunder and lightning weather uses down;

(2) utilize wireless that sound amplifier is carried out voice transfer and control, provide convenience, also make announcer's operation become more convenient for the timely issue of message;

(3) one intercoms or other wireless speech sender unit can especially be fit to Da Zhuan and organize village user use more with the wireless remote control sound amplifier of number playscript with stage directions utility model.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing 1 is the schematic block circuit diagram of wireless remote control sound amplifier;

Accompanying drawing 2 is the electrical block diagram of wireless remote control sound amplifier.

Embodiment

Explain below with reference to Figure of description wireless remote control sound amplifier of the present utility model being done:

As shown in Figure 1, wireless remote control sound amplifier of the present utility model, its structure is to be made of power circuit A, power amplifier B, intercom receiver C, power circuit A, power amplifier B, intercom receiver C join in twos.

As shown in Figure 2, power circuit A is by capacitor C 8-C10, relay J, relay switch JK, transformer B1, diode D1, D2, rectifier ZL1, integrated regulator U3 constitutes, the external 220V power supply of first polar curve circle L3 of transformer B1, secondary coil L1, diode D2, D1 is connected in series successively and forms the loop, the intermediate contact of diode D1 and D2 joins by capacitor C 10 and ground wire, the intermediate contact of diode D1 and D2 also joins by 5 pin of the integrated amplifier U2 among relay switch JK and the power amplifier B, relay J is serially connected between ground wire and the intercom receiver C, the two ends of the secondary coil L2 of transformer B1 join with 1 pin and 3 pin of rectifier ZL1 respectively, 2 pin and the ground wire of rectifier ZL1 join, 1 pin of 4 pin and integrated regulator U3 joins, 2 pin of integrated regulator U3 and intercom receiver C+the 8V power input joins, 3 pin and ground wire join, capacitor C 8 is serially connected between 2 pin and 3 pin of integrated regulator U3, and capacitor C 9 is serially connected between 1 pin and 3 pin of integrated regulator U3.Wherein, the model of integrated regulator U3 is LM7808.

Power amplifier B is by resistance R 1-R12, capacitor C 1-C7, integrated amplifier U1, U2 constitutes, resistance R 1 is serially connected between the signal input part IN1 and IN2 of power amplifier, signal input part IN2 and ground wire join, resistance R 2, R4 is serially connected between 5 pin of ground wire and integrated amplifier U1,1 pin of integrated amplifier U1 joins with signal input part IN1 by capacitor C 1,2 pin are by capacitor C 2, resistance R 6 is joined with ground wire, 3 pin directly and ground wire join, 4 pin and loudspeaker output Uot1 join, 5 pin of 5 pin and integrated amplifier U2 join, capacitor C 3, C4 is attempted by between 5 pin and ground wire of integrated amplifier U1, resistance R 7 is serially connected between 4 pin of capacitor C 2 and integrated amplifier U1, resistance R 3, R5 is serially connected between 1 pin of 1 pin of integrated amplifier U1 and integrated amplifier U2, resistance R 2, the intermediate contact of R4 and resistance R 3, the intermediate contact of R5 joins, capacitor C 5, resistance R 8 is serially connected between 4 pin and ground wire of integrated amplifier U1, the 2 pin serial connection capacitor C 7 of integrated amplifier U2, resistance R 10 backs join with 4 pin of integrated amplifier U2,4 pin also join with loudspeaker output Uot2,3 pin and ground wire join, one end of resistance R 11 and 4 pin of integrated amplifier U1 join, the intermediate contact of the other end and capacitor C 7 and resistance R 10 joins, resistance R 12 is serially connected between capacitor C 7 and the ground wire, capacitor C 6, resistance R 9 is serially connected between 4 pin and ground wire of integrated amplifier U2.Wherein, the model of integrated amplifier U1, U2 is LM1875.

Intercom receiver C is a known technology, and signal output part Uot3, the Uot4 of intercom receiver C joins with signal input part IN1 and the IN2 of power amplifier B respectively, and power supply input negative pole and ground wire join.

Employed other resistance, electric capacity, rectifier, relay, transformer are the universal electric product in the circuit.

During use, only need loudspeaker output Uot1, Uot2 are joined and can use with audio amplifier or loudspeaker.In addition, can also be simultaneously in the circuit and connect two groups or more power amplifier, like this, a wireless remote control sound amplifier just can be with organize audio amplifiers or loudspeaker work more.

Except that the described technical characterictic of specification, be the known technology of those skilled in the art.

Claims

1. The wireless remote control loudspeaker is composed of a power supply circuit (A), a power amplifier circuit (B), and an intercom receiver (C). It is characterized in that the power supply circuit (A), the power amplifier circuit (B), and the intercom receiver (C) connected, among them,

The power circuit (A) is composed of capacitors C8-C10, relay J, relay switch JK, transformer B1, diodes D1, D2, rectifier ZL1, and integrated voltage regulator U3. The primary coil L3 of the transformer B1 is connected to an external 220V power supply, and the secondary coil L1, diodes D2 and D1 are connected in series to form a loop, the middle junction of diodes D1 and D2 is connected to the ground wire through capacitor C10, and the middle junction of diodes D1 and D2 is also amplified through the integration of relay switch JK and power amplifier circuit (B) The 5 pins of the circuit U2 are connected, the relay J is connected in series between the ground wire and the walkie-talkie receiver (C), the two ends of the secondary coil L2 of the transformer B1 are respectively connected with the 1 pin and the 3 pin of the rectifier ZL1, and the rectifier ZL1 Pin 2 of the integrated voltage regulator is connected to the ground wire, pin 4 is connected to pin 1 of the integrated voltage regulator U3, pin 2 of the integrated voltage regulator U3 is connected to the +8V power input terminal of the walkie-talkie receiver (C), and pin 3 is connected to the The ground wires are connected, the capacitor C8 is connected in series between pin 2 and pin 3 of the integrated voltage regulator U3, and the capacitor C9 is connected in series between pin 1 and pin 3 of the integrated voltage regulator U3;

The power amplifier circuit (B) is composed of resistors R1-R12, capacitors C1-C7, and integrated amplifier circuits U1 and U2. The resistor R1 is connected in series between the signal input terminals IN1 and IN2 of the power amplifier circuit, and the signal input terminal IN2 is connected to the ground wire. , resistors R2 and R4 are connected in series between the ground wire and pin 5 of the integrated amplifier circuit U1, pin 1 of the integrated amplifier circuit U1 is connected to the signal input terminal IN1 through capacitor C1, and pin 2 is connected to the ground wire through capacitor C2 and resistor R6 The 3rd pin is directly connected to the ground wire, the 4th pin is connected to the amplifier output terminal Uot1, the 5th pin is connected to the 5th pin of the integrated amplifier circuit U2, and the capacitors C3 and C4 are connected to the 5th pin of the integrated amplifier circuit U1. Between pin and ground wire, resistor R7 is connected in series between capacitor C2 and pin 4 of integrated amplifier circuit U1, resistors R3 and R5 are connected in series between pin 1 of integrated amplifier circuit U1 and pin 1 of integrated amplifier circuit U2, The intermediate junctions of resistors R2 and R4 are connected to the middle junctions of resistors R3 and R5, capacitor C5 and resistor R8 are connected in series between pin 4 of integrated amplifier circuit U1 and the ground wire, and pin 2 of integrated amplifier circuit U2 is connected in series with capacitor C7 1. Resistor R10 is connected with pin 4 of the integrated amplifier circuit U2, pin 4 is also connected with the amplifier output terminal Uot2, pin 3 is connected with the ground wire, and one end of the resistor R11 is connected with pin 4 of the integrated amplifier circuit U1 Connected, the other end is connected to the intermediate point of the capacitor C7 and the resistor R10, the resistor R12 is connected in series between the capacitor C7 and the ground wire, the capacitor C6 and the resistor R9 are connected in series between the 4 pin of the integrated amplifier circuit U2 and the ground wire;

The signal output terminals Uot3 and Uot4 of the walkie-talkie receiver (C) are respectively connected to the signal input terminals IN1 and IN2 of the power amplifier circuit (B), and the negative pole of the power input is connected to the ground wire.