CN217883745U

CN217883745U - Portable wireless sound amplifying receiver

Info

Publication number: CN217883745U
Application number: CN202222241883.8U
Authority: CN
Inventors: 黄知顺; 曹实义; 李训
Original assignee: Shenzhen Fengheyuan Technology Co ltd
Current assignee: Shenzhen Fengheyuan Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-11-22
Anticipated expiration: 2032-08-24

Abstract

The utility model relates to a portable wireless public address receiver, which comprises a housin, the holding tank has been seted up at the top of casing, be provided with the slip subassembly in the holding tank, be provided with the USB interface on the slip subassembly, the bottom of casing is provided with the audio interface, be provided with the circuit board in the casing, the USB interface electricity is connected in the circuit board, the USB interface is used for pegging graft audio playback equipment so that audio playback equipment supplies power for the circuit board, be provided with bluetooth module and audio decoding module on the circuit board, bluetooth module is used for with terminal equipment bluetooth wireless connection and receives the audio data of terminal equipment output, audio decoding module is coupled in bluetooth module in order to receive audio data, the audio interface electricity is connected in audio decoding module, audio decoding module is used for decoding the original audio data according to obtain the audio frequency, audio interface is used for being connected with audio playback equipment with transmission audio playback equipment audio to audio playback equipment after the reduction. The music instrument equipment without the Bluetooth function is connected with the terminal equipment in a Bluetooth wireless communication mode.

Description

Portable wireless sound amplifying receiver

Technical Field

The application relates to the technical field of Bluetooth electronic equipment, in particular to a portable wireless sound amplifying receiver.

Background

At present, some musical instrument devices without the bluetooth function are in wired connection with terminal devices such as mobile phones through audio data lines, and audio data on the terminal devices are transmitted to the musical instrument devices through the audio data lines, so that music in the mobile phones and sound of the musical instrument devices are mixed and output.

However, the length of the audio data line belongs to a universal accessory, the terminal equipment and the musical instrument equipment are connected through the audio data line and can be limited by the length of the audio data line, the method of connection through the audio data line is quite inconvenient and poor in convenience, meanwhile, the number of the data lines of the musical instrument equipment is increased, the data lines are easily messy, and therefore a certain improvement space exists.

SUMMERY OF THE UTILITY MODEL

In order to enable a musical instrument device without a Bluetooth function to be connected with a terminal device in a wireless communication mode, the application provides a portable wireless loud-speaker receiver.

The application provides a portable wireless public address receiver adopts following technical scheme:

the utility model provides a portable wireless public address receiver, includes the casing, the holding tank has been seted up at the top of casing, be provided with the slip subassembly in the holding tank, be provided with the USB interface on the slip subassembly, the bottom of casing is provided with the audio interface, be provided with the circuit board in the casing, the USB interface electricity is connected in the circuit board, the USB interface is used for pegging graft audio playback equipment so that audio playback equipment does not the circuit board power supply, be provided with bluetooth module and audio decoding module on the circuit board, bluetooth module is used for receiving the audio data of terminal equipment output with terminal equipment bluetooth wireless connection, audio decoding module is coupled in bluetooth module in order to receive audio data, audio interface electricity is connected in audio decoding module, audio decoding module is used for decoding the reduction audio data in order to obtain the audio frequency, the audio interface is used for being connected with audio playback equipment in order to transmit audio playback equipment after the decoding reduction to audio playback equipment.

Through adopting above-mentioned technical scheme, through seting up the holding tank on the casing, be convenient for the USB interface when not using, move to the holding tank in through the slip subassembly, can prevent effectively that the USB interface from receiving external force and damaging, the life of extension USB interface, make the receiver peg graft on the audio playback equipment who does not have bluetooth function through the USB interface, make equipment supply power for the receiver, bluetooth wireless signal is sent out to bluetooth module on the circuit board in the receiver, make equipment have bluetooth wireless connection function, can carry out bluetooth wireless connection with the terminal equipment who has bluetooth function, the terminal equipment accessible bluetooth wireless communication of terminal equipment with bluetooth function transmits the audio data of terminal equipment to the bluetooth module in the receiver, bluetooth module transmits received audio data to audio decoding module, audio decoding module decodes audio data and restores and obtains the audio frequency, transmit audio frequency to audio playback equipment through the audio interface and mix the broadcast, make the audio playback equipment that does not have bluetooth function and terminal equipment realize bluetooth wireless communication and be connected.

Optionally, the bluetooth module includes a chip U1, the chip U1 includes a power management end, a switch end, an interface end and a wireless radio frequency end, the power management end of the chip U1 is coupled to the system power supply to input the system voltage, the switch end of the chip U1 is coupled to a switch SW1, the other end of the switch SW1 is coupled to the system power supply, the interface end of the chip U1 is coupled to the USB interface, the wireless radio frequency end of the chip U1 is coupled to a crystal oscillator Y1, and the other end of the crystal oscillator Y1 is grounded.

Through adopting above-mentioned technical scheme, the power management end of chip U1 through bluetooth module inputs the operating voltage who supplies chip U1 to start work from the system power, press switch SW1, the switch end of chip U1 switches on, make chip U1 circular telegram start bluetooth function, the voltage that USB interface input equipment provided is followed to chip U1's interface end, crystal oscillator Y1 is coupled to chip U1's wireless radio frequency end, through crystal oscillator Y1 transmission bluetooth radio signal, realize bluetooth wireless connection function.

Optionally, the sliding assembly comprises a sliding seat and a sliding block, a sliding rail is arranged on the inner side wall of the accommodating groove, the sliding seat is connected to the sliding rail in a sliding mode, the sliding block comprises a fixing rod and a pushing block, one end of the fixing rod is fixedly connected with the pushing block, one end, far away from the pushing block, of the fixing rod penetrates through the shell and is connected with the sliding seat, and a sliding chute for the fixing rod to slide is formed in the shell.

Through adopting above-mentioned technical scheme, set up the slide rail through the relative both sides at the inside wall of holding tank, make the sliding seat slide in the holding tank, through setting up the sliding block, the user's accessible exerts external force to promoting the piece, make and promote piece and dead lever and remove in the spout, and then promote the removal of sliding seat on the slide rail, the USB interface sets up on the sliding seat, slide in the holding tank through the sliding seat, make the USB interface can be located the holding tank or stretch out outside the holding tank.

Optionally, the top of the pushing block is recessed towards the fixing rod, and a plurality of anti-slip strips are arranged on the top of the pushing block.

Through adopting above-mentioned technical scheme, the top that promotes the piece is sunken setting, and is provided with a plurality of antislip strips, increases user's finger and the frictional force that promotes the piece, and the user of being convenient for exerts external force and orders about the removal of promotion piece to promoting the piece.

Optionally, be provided with the broadcast subassembly and switch the button on the casing, the broadcast subassembly includes loudspeaker, loudspeaker are connected with audio decoding module and audio playback equipment electricity respectively, loudspeaker are used for playing the audio frequency of audio decoding module output and the audio frequency of audio playback equipment output, switch the button and establish ties between loudspeaker and audio decoding module, and establish ties between loudspeaker and audio playback equipment, switch the button and still establish ties between audio interface and audio playback equipment, switch the button and be used for switching audio data transmission route.

Through adopting above-mentioned technical scheme, through set up loudspeaker and switching button on the casing, and loudspeaker are connected with audio decoding module and audio playback equipment electricity respectively, after audio playback equipment's broadcast subassembly breaks down, the user can control the switching button, the switching button makes and is the off-state between audio interface and the audio playback equipment, all be the on-state between loudspeaker and the audio decoding module and between loudspeaker and the audio playback equipment, audio transmission to loudspeaker after audio decoding module decoded the audio data reduction, audio playback equipment is with its self audio transmission to loudspeaker, make the loudspeaker broadcast audio frequency on the casing, make the receiver have the instant music, increase bluetooth wireless receiver's functionality.

Optionally, a heat dissipation hole is formed in the outer side wall of the casing, a heat dissipation fan is further arranged inside the casing, the heat dissipation fan is located at the heat dissipation hole, a temperature monitoring circuit used for controlling the power on and off of the heat dissipation fan is further arranged on the circuit board, the heat dissipation fan is electrically connected with the circuit board, the temperature monitoring circuit comprises a detection unit, a comparison unit and a switch unit, the output end of the detection unit is coupled to the comparison unit so as to output a temperature detection signal to the comparison unit, the comparison unit is provided with a temperature threshold value, the output end of the comparison unit is coupled to the switch unit, when the temperature detection signal is greater than the temperature threshold value, the comparison unit outputs a first temperature comparison signal to the switch unit, when the temperature detection signal is smaller than the temperature threshold value, the comparison unit outputs a second temperature comparison signal to the switch unit, the output end of the switch unit is coupled to a power supply loop of the heat dissipation fan, the switch unit is used for outputting an on signal to the power supply loop of the heat dissipation fan when the first temperature comparison signal is received, the heat dissipation fan is powered on and the heat dissipation fan is not powered on.

By adopting the technical scheme, the radiating holes are formed in the outer side wall of the shell, so that heat generated in the shell when the receiver works is discharged out of the shell through the radiating holes, the temperature monitoring circuit on the circuit board monitors temperature change in the shell in real time, when the temperature in the shell is too high, the temperature detection signal output by the detection unit is increased, the comparison unit receives the temperature detection signal which is greater than a temperature threshold value, the comparison unit outputs a first temperature comparison signal to the switch unit, the switch unit outputs a starting signal to the power supply loop of the radiating fan when receiving the first temperature comparison signal, the power supply loop of the radiating fan is conducted, the radiating fan is electrified and started, and air-cooled radiation is carried out on the interior of the shell; when the temperature in the shell is reduced, the temperature detection signal output by the detection unit is reduced, the comparison unit receives the temperature detection signal smaller than the temperature threshold value, the comparison unit outputs a second temperature comparison signal to the switch unit, the switch unit outputs a disconnection signal to the power supply loop of the heat dissipation fan, the power supply loop of the heat dissipation fan is disconnected, the heat dissipation fan is powered off and stops working, and the function of heat dissipation for the receiver is achieved.

Optionally, the detecting element includes temperature sensor, temperature sensor installs inside the casing, temperature sensor includes thermistor RT, thermistor RT establishes ties has first resistance R1, first resistance R1's the other end is coupled in the power, thermistor RT's the other end ground connection, thermistor RT and first resistance R1's connected node is coupled in the comparing element.

By adopting the technical scheme, the temperature change condition in the shell is detected in real time through the temperature sensor, when the temperature in the shell is overhigh, the resistance value of the thermistor RT is increased, the voltage at two ends of the thermistor RT is increased, the high level is output by the connection node of the thermistor RT and the first resistor R1, and the temperature detection signal output by the detection unit is increased; when the temperature in the shell is reduced, the resistance value of the thermistor RT is reduced, the voltages at two ends of the thermistor RT are reduced, the connection node of the thermistor RT and the first resistor R1 outputs a low level, the temperature detection signal output by the detection unit is reduced, and the temperature detection function is realized.

Optionally, the comparing unit includes comparator N1, the first input end of comparator N1 is coupled in thermistor RT and first resistance R1's connected node, second input end of comparator N1 establishes ties in proper order has second resistance R2 and third resistance R3, the other end of third resistance R3 is coupled in the threshold power, fourth resistance R4 is coupled in second resistance R2 and third resistance R3's connected node, fourth resistance R4's other end ground connection, comparator N1's output is coupled in the switching unit.

By adopting the technical scheme, the comparison unit inputs the temperature detection signal through the first input end of the comparator N1 and inputs the temperature threshold value through the second input end of the comparator N1, when the temperature detection signal input by the comparison unit is increased, the first input end of the comparator N1 inputs a high level, the voltage input by the first input end of the comparator N1 is greater than the voltage input by the second input end of the comparator N1, the output end of the comparator N1 outputs a high level, and the comparison unit outputs the first temperature comparison signal; when the temperature detection signal input by the comparison unit is reduced, the first input end of the comparator N1 inputs a low level, the voltage input by the first input end of the comparator N1 is smaller than the voltage input by the second input end of the comparator N1, the output end of the comparator N1 outputs the low level, and the comparison unit outputs a second temperature comparison signal to realize the temperature comparison function.

Optionally, the switching unit includes an NPN-type triode Q1, a thyristor BCR and a relay KM1, a base of the triode Q1 is coupled to an output end of the comparator N1, a collector of the triode Q1 is coupled to the power supply after being connected in series with the relay KM1, an emitter of the triode Q1 is grounded, a control electrode of the thyristor BCR is coupled to the emitter of the triode Q1, the relay KM1 includes a normally open contact switch KM1-1, and the thyristor BCR and the normally open contact switch KM1-1 are connected in series to a power supply loop of the heat dissipation fan.

By adopting the technical scheme, when the switch unit receives the first temperature comparison signal, the base electrode of the NPN type triode Q1 inputs a high level, the triode Q1 is in a conducting state, the relay KM1 is electrified, the thyristor BCR is conducted, the normally open contact switch KM1-1 is electrified to be in a closed state, the switch unit outputs an opening signal to the power supply loop of the heat dissipation fan, the power supply loop of the heat dissipation fan is conducted, and the heat dissipation fan is electrified and started; when the switch unit receives the second temperature comparison signal, the base of the NPN type triode Q1 inputs a low level, the triode Q1 is in a non-conducting state, the relay KM1 is not powered on, the thyristor BCR is not conducted, the normally open contact switch KM1-1 is in a disconnected state when power is cut off, the switch unit outputs a disconnection signal to a power supply loop of the heat dissipation fan, the power supply loop of the heat dissipation fan is disconnected, and the heat dissipation fan stops working when power is cut off.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the device supplies power to the receiver, sends out a Bluetooth wireless signal through a Bluetooth module on a circuit board, enables the device to have a Bluetooth wireless connection function, can be in Bluetooth wireless connection with terminal equipment with the Bluetooth function, can receive audio data of the terminal equipment at the same time, transmits the received audio data to an audio decoding module, decodes and restores the audio data to obtain high-quality audio, transmits the audio to the audio playing device through an audio interface for mixed playing, and enables musical instrument equipment without the Bluetooth function to be in Bluetooth wireless communication connection with the terminal equipment;

2. the accommodating groove is formed in the shell, so that the USB interface can be conveniently moved in the sliding groove by applying external force to the pushing block when the USB interface is not used, and then the sliding seat is pushed to move on the sliding rail;

3. the loudspeaker and the switching button are arranged on the shell, the loudspeaker is respectively electrically connected with the audio decoding module and the audio playing device, after a playing component of the audio playing device breaks down, a user can control the switching button, the switching button enables the audio interface and the audio playing device to be in an off state, the loudspeaker and the audio decoding module and the loudspeaker and the audio playing device are in an on state, the audio decoding module transmits audio after decoding and restoring audio data to the loudspeaker, the audio playing device transmits the audio of the audio decoding module to the loudspeaker, the loudspeaker on the shell plays music, the receiver has a playing function, and the functionality of the Bluetooth wireless receiver is improved;

4. set up the louvre through the lateral wall at the casing, outside the heat that makes the inside production of receiver during operation casing discharged to the casing through the louvre, the temperature variation in the temperature monitoring circuit real-time supervision casing on the circuit board, when the casing internal temperature was too high, the power supply circuit of heat dissipation fan switched on, and the circular telegram of heat dissipation fan is started, carries out the forced air cooling heat dissipation to the casing internal portion.

Drawings

Fig. 1 is a schematic structural diagram of a portable wireless public address receiver according to an embodiment of the present application.

Fig. 2 is a rear view of a portable wireless amplified receiver according to an embodiment of the present application.

Fig. 3 is a rear view of a circuit board of a portable wireless amplified receiver according to an embodiment of the present application.

Fig. 4 is a block diagram of a circuit board of a portable wireless microphone receiver according to an embodiment of the present application.

Fig. 5 is a circuit block diagram of a circuit board of a portable wireless microphone receiver according to an embodiment of the present application.

Fig. 6 is a circuit diagram of a bluetooth module of a portable wireless loud-speaker receiver according to an embodiment of the present application.

Fig. 7 is a circuit diagram of a temperature monitoring circuit of a portable wireless microphone receiver according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 11. accommodating a tank; 12. a chute; 13. a horn; 14. heat dissipation holes; 15. switching a key; 2. a USB interface; 3. an audio interface; 4. a sliding assembly; 41. a sliding seat; 42. a slider; 421. fixing the rod; 422. a pushing block; 5. a circuit board; 51. a Bluetooth module; 52. an audio decoding module; 6. a detection unit; 7. a comparison unit; 8. a switch unit; 9. a heat dissipation fan.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a portable wireless public address receiver.

Referring to fig. 1, a portable wireless public address receiver includes casing 1, and holding tank 11 has been seted up at the top of casing 1, is provided with USB interface 2 in the holding tank 11, and the bottom of casing 1 is provided with audio interface 3, has seted up louvre 14 on one side of the outer wall of casing 1, and casing 1 is inside to be located louvre 14 and locates fixed mounting to have heat dissipation fan 9, and the top of casing 1 still is provided with switches button 15, and the front end of casing 1 is provided with two loudspeaker 13.

Referring to fig. 2 and 3, a circuit board 5 is further provided inside the housing 1, and the usb interface 2 and the audio interface 3 are electrically connected to the circuit board 5, respectively. A sliding assembly 4 is arranged in the accommodating groove 11, the sliding assembly 4 comprises a sliding seat 41 and a sliding block 42, the usb interface 2 is fixed on the sliding seat 41, a sliding rail is arranged on the inner side wall of the accommodating groove 11, the sliding rail is arranged along the extending direction of the accommodating groove 11, the sliding block 42 comprises a fixed rod 421 and a pushing block 422, a sliding groove 12 is arranged on the outer side wall of the shell 1, one end of the fixed rod 421 penetrates through the sliding groove 12 to be fixedly connected with the pushing block 422, one end of the fixed rod 421, which is far away from the pushing block 422, is fixedly connected with the sliding seat 41, the top of the pushing block 422 is arranged in a recessed manner close to the middle position towards the direction of the fixed rod 421, and a plurality of anti-slip strips are arranged at the top of the pushing block 422.

Referring to fig. 4 and 5, a bluetooth module 51 and an audio decoding module 52 are disposed on the circuit board 5, the switch button 15 is electrically connected to the circuit board, the USB interface 2 is electrically connected to the bluetooth module 51, the bluetooth module 51 is configured to generate a bluetooth wireless signal to be transmitted to a terminal device having a bluetooth function and receive audio data transmitted by a device terminal, the audio decoding module 52 is coupled to the bluetooth module 51 to receive the audio data, the audio interface 3 is electrically connected to the audio decoding module 52, the audio decoding module 52 decodes the audio data into audio and transmits the audio to an audio player through the audio interface 3, and the audio is played through the audio player.

Loudspeaker 13 is connected with audio decoder module 52 and audio playback equipment electricity respectively, and loudspeaker 13 is used for playing the audio frequency of audio decoder module output and the audio frequency of audio playback equipment output, switches button 15 and establishes ties between loudspeaker 13 and audio decoder module 52, and establishes ties between loudspeaker 13 and audio playback equipment, switches button 15 and still establishes ties between audio interface 3 and audio playback equipment, it is used for switching audio data transmission route to switch button 15.

Specifically, after the play subassembly in the audio playback equipment breaks down, the user can control switch button 15, switch button 15 makes and is the off-state between audio interface 3 and the audio playback equipment, all be the closed state between loudspeaker 13 and the audio decoding module 52 and between loudspeaker 13 and the audio playback equipment, audio decoding module 52 decodes the high tone quality music transmission to loudspeaker 13 after the reduction with audio data, the audio playback equipment is with its music transmission to loudspeaker 13, make loudspeaker 13 broadcast music.

Power management end, switch end, interface end and wireless radio frequency end

Referring to fig. 6, the bluetooth module includes a chip U1 with a model AB1565D, the chip U1 includes ninety-six pins, the first to eighth pins, the ninety-third to ninety-sixth pins of the chip U1 are power management terminals, the thirteenth to sixteenth pins of the chip U1 are switch terminals, the seventeenth and eighteenth pins of the chip U1 are interface terminals, and the forty-third and forty-fourth pins of the chip U1 are radio frequency terminals. A first pin of the chip U1 is coupled with a first capacitor C1 and a second capacitor C2 respectively, the other end of the first capacitor C1 is grounded, the other end of the second capacitor C2 is grounded, the first pin of the chip U1 also outputs VDD33 voltage, a second pin of the chip U1 is grounded after being connected in series with a third capacitor C3, a third pin of the chip U1 is coupled with a fourth capacitor C4, the other end of the fourth capacitor C4 is grounded, a third pin of the chip U1 also outputs VRF _ LDO voltage, a fourth pin of the chip U1 is coupled with a fifth capacitor C5, the other end of the fifth capacitor C5 is grounded, a fourth pin of the chip U1 also outputs VCORE voltage, a fifth pin of the chip U1 is coupled with a fourth pin of the chip U1, a sixth pin of the chip U1 is coupled with the first pin of the chip U1, a seventh pin of the chip U1 is coupled with the first pin of the chip U1, an eighth pin of the chip U1 is coupled with a sixth capacitor C6, the other end of the sixth capacitor C6 is grounded, a pin of the chip U1 is coupled with the first pin of the chip U1, a fifteenth pin of the chip U1 is coupled with a power supply system voltage stabilizer switch, a fifteenth switch, a power supply resistor ys 1 is coupled with a power supply resistor ys 1, a resistor ysr 2 is coupled with a second diode, a fifth pin of the power supply system switch, a diode. The seventeenth pin and the eighteenth pin of the chip U1 are coupled to the USB interface, the twenty-third pin of the chip U1 is connected in series with a seventh capacitor C7, the other end of the seventh capacitor C7 is grounded, the twenty-third pin of the chip U1 is also coupled to the first pin of the chip U1, the twenty-fourth pin of the chip U1 is respectively coupled with an eighth capacitor C8 and a ninth capacitor C9, the other end of the eighth capacitor C8 and the other end of the ninth capacitor C9 are respectively grounded, the twenty-fourth pin of the chip U1 is also coupled to the third pin of the chip U1, the twenty-fifth pin of the chip U1 is coupled with a tenth capacitor C10, the other end of the tenth capacitor C10 is grounded, and the twenty-fifth pin of the chip U1 is coupled to the twenty-fourth pin of the chip U1. A forty-third pin of the chip U1 is coupled to the first pin of the crystal Y1, a forty-fourth pin of the chip U1 is coupled to the third pin of the crystal Y1, both the second pin and the fourth pin of the crystal Y1 are grounded, a forty-fifth pin of the chip U1 is sequentially connected in series with an eleventh capacitor C11, a twelfth capacitor C12 and a thirteenth capacitor C13, a connection node between the eleventh capacitor C11 and the forty-fifth pin of the chip U1 is coupled with a fourteenth capacitor C14, the other end of the fourteenth capacitor C14 is grounded, a connection node between the eleventh capacitor C11 and the twelfth capacitor C12 is coupled with a fifteenth capacitor C15, the other end of the fifteenth capacitor C15 is grounded, a connection node between the twelfth capacitor C12 and the thirteenth capacitor C13 is coupled with a sixteenth capacitor C16, the other end of the sixteenth capacitor C16 is grounded, the other end of the thirteenth capacitor C13 is coupled with a seventeenth capacitor C17, and the other end of the seventeenth capacitor C17 is grounded. A nineteenth capacitor C19 and a twentieth capacitor C20 are respectively coupled to a seventeenth pin of the chip U1, the other end of the nineteenth capacitor C19 is grounded, the other end of the twentieth capacitor C20 is grounded, the seventeenth pin of the chip U1 is further coupled to a system power supply VSYS, an eighteenth capacitor C18 is coupled to a seventeenth pin of the chip U1, the other end of the eighteenth capacitor C18 is grounded, and the seventeenth pin of the chip U1 outputs a voltage VBUS. A twenty-second capacitor C22 is coupled to the seventy-third pin of the chip U1, the other end of the twenty-second capacitor C22 is grounded, the seventy-third pin of the chip U1 is coupled to the seventy-fourth pin of the chip U1, the seventy-fourth pin of the chip U1 is coupled to the twenty-first capacitor C21, the other end of the twenty-first capacitor C21 is grounded, the seventy-fourth pin of the chip U1 is coupled to the eighth pin of the chip U1, the ninety-fourth pin of the chip U1 is coupled to the eighth pin of the chip U1 after being connected in series with the inductor L1, and the ninety-sixth pin of the chip U1 is coupled to the fourth pin of the chip U1 after being connected in series with the inductor L2.

Referring to fig. 7, a temperature monitoring circuit for controlling the power on and off of the heat dissipation fan 9 is further disposed on the circuit board, and the temperature monitoring circuit includes a detection unit 6, a comparison unit 7, and a switch unit 8.

The output end of the detecting unit 6 is coupled to the comparing unit 7, and the detecting unit 6 is used for outputting a temperature detecting signal to the comparing unit 7 according to the temperature condition inside the housing 1. The detection unit 6 comprises a temperature sensor, the temperature sensor is installed inside the shell 1, the temperature sensor comprises a thermistor RT and a first resistor R1, the thermistor RT is connected with the first resistor R1 in series, the other end of the first resistor R1 is connected with a power supply in a coupling mode, the other end of the thermistor RT is connected with the ground, and a connection node of the thermistor RT and the first resistor R1 is connected with the comparison unit 7 in a coupling mode.

Specifically, when the temperature inside the casing 1 is too high, the resistance of the thermistor RT increases, the voltage at the two ends of the thermistor RT increases, the connection node between the thermistor RT and the first resistor R1 outputs a high level, and the temperature detection signal output by the detection unit 6 increases; when the temperature inside the casing 1 decreases, the resistance value of the thermistor RT decreases, the voltage at both ends of the thermistor RT decreases, the connection node of the thermistor RT and the first resistor R1 outputs a low level, and the temperature detection signal output by the detection unit 6 decreases.

The output end of the comparing unit 7 is coupled to the switch unit 8, the comparing unit 7 is provided with a temperature threshold, when the temperature detection signal is greater than the temperature threshold, the comparing unit 7 outputs a first temperature comparison signal to the switch unit 8, and when the temperature detection signal is less than the temperature threshold, the comparing unit 7 outputs a second temperature comparison signal to the switch unit 8. The comparison unit 7 includes a comparator N1, a second resistor R2, a third resistor R3, and a fourth resistor R4, the first input terminal of the comparator N1 is a positive input terminal, the second input terminal of the comparator N1 is a negative input terminal, the positive input terminal of the comparator N1 is coupled to a connection node between the thermistor RT and the first resistor R1, the negative input terminal of the comparator N1 is coupled to the second resistor R2, the other end of the second resistor R2 is coupled to the third resistor R3, the other end of the third resistor R3 is coupled to the threshold power source VREF, the connection node between the second resistor R2 and the third resistor R3 is coupled to the fourth resistor R4, the other end of the fourth resistor R4 is grounded, and the output terminal of the comparator N1 is coupled to the switch unit 8.

Specifically, when the temperature detection signal input by the comparing unit 7 increases, the positive input terminal of the comparator N1 inputs a high level, the voltage input by the positive input terminal of the comparator N1 is greater than the voltage input by the negative input terminal of the comparator N1, the output terminal of the comparator N1 outputs a high level, and the comparing unit 7 outputs a first temperature comparison signal; when the temperature detection signal input by the comparing unit 7 decreases, the positive input terminal of the comparator N1 inputs a low level, the voltage input by the positive input terminal of the comparator N1 is less than the voltage input by the negative input terminal of the comparator N1, the output terminal of the comparator N1 outputs a low level, and the comparing unit 7 outputs a second temperature comparison signal.

The output end of the switch unit 8 is coupled to the power supply circuit of the heat dissipation fan 9, the switch unit 8 outputs a turn-on signal to the power supply circuit of the heat dissipation fan 9 when receiving the first temperature comparison signal, and the switch unit 8 outputs a turn-off signal to the power supply circuit of the heat dissipation fan 9 when receiving the second temperature comparison signal. The switch unit 8 comprises an NPN type triode Q1, a thyristor BCR and a relay KM1, wherein the base electrode of the triode Q1 is coupled with the output end of the comparator N1, the collector electrode of the triode Q1 is coupled with the power supply after being connected with the relay KM1 in series, the emitting electrode of the triode Q1 is grounded, the control electrode of the thyristor BCR is coupled with the emitting electrode of the triode Q1, the relay KM1 comprises a normally open contact switch KM1-1, and the thyristor BCR and the normally open contact switch KM1-1 are connected with a power supply loop of the heat dissipation fan 9 in series.

Specifically, when the switching unit 8 receives the first temperature comparison signal, a high level is input to the base of the NPN-type triode Q1, the triode Q1 is in a conducting state, the relay KM1 is energized, the thyristor BCR is conducted, the normally-open contact switch KM1-1 is energized and is in a closed state, the switching unit 8 outputs an on signal to the power supply loop of the heat dissipation fan 9, when the switching unit 8 receives the second temperature comparison signal, a low level is input to the base of the NPN-type triode Q1, the triode Q1 is in a non-conducting state, the relay KM1 is not energized, the thyristor BCR is not energized, the normally-open contact switch KM1-1 is in an off state, and the switching unit 8 outputs an off signal to the power supply loop of the heat dissipation fan 9.

The implementation principle of the portable wireless public address receiver in the embodiment of the application is as follows:

when the USB interface 2 needs to be used, a user can apply an external force to the pushing block 422 to move the pushing block 422 and the fixing rod 421 in the sliding groove 12, and further push the sliding seat 41 to move on the sliding rail, so that the USB interface 2 on the sliding seat 41 extends out of the accommodating groove 11, and if the USB interface 2 does not need to be used, the USB interface 2 is moved into the accommodating groove 11, so that the USB interface 2 can be effectively prevented from being damaged by the external force, and the service life of the USB interface 2 is prolonged;

the receiver is plugged into the audio playing device without the Bluetooth function through the USB interface 2, the audio playing device supplies power to the receiver, the Bluetooth module 51 on the circuit board 5 outputs Bluetooth wireless signals to the terminal device with the Bluetooth function, so that the audio playing device has the Bluetooth wireless connection function and can be in Bluetooth wireless connection with the terminal device with the Bluetooth function, and the terminal device with the Bluetooth function can transmit audio data into the receiver through Bluetooth wireless communication;

the bluetooth module 51 transmits the received audio data to the audio decoding module 52, the audio decoding module 52 decodes and restores the audio data to obtain audio, the audio interface 3 is inserted into an audio playing device, the audio is transmitted into the audio playing device through the audio interface 3, and the audio can be played through the audio playing device.

When a playing component in the audio playing device breaks down, a user can operate the switching key 15, the switching key 15 enables the audio interface 3 and the audio playing device to be in an off state, the loudspeaker 13 and the audio decoding module 52 and the loudspeaker 13 and the audio playing device to be in an on state, the audio decoding module 52 transmits audio data after decoding and restoring to the loudspeaker 13, the audio playing device transmits the audio data to the loudspeaker 13, the loudspeaker 13 on the shell 1 plays the audio, and the receiver has a playing function.

When the receiver is increased along with the working time, the temperature monitoring circuit on the circuit board 5 is started, the temperature inside the casing 1 is increased, when the temperature inside the casing 1 is too high, the resistance value of the thermistor RT of the detection unit 6 is increased, the voltage at two ends of the thermistor RT is increased, the connection node of the thermistor RT and the first resistor R1 outputs a high level, the temperature detection signal output by the detection unit 6 is increased, the temperature detection signal input by the comparison unit 7 is increased, the positive phase input end of the comparator N1 inputs a high level, the voltage input by the positive phase input end of the comparator N1 is greater than the voltage input by the reverse phase input end of the comparator N1, the output end of the comparator N1 outputs a high level, the comparison unit 7 outputs a first temperature comparison signal, the switch unit 8 receives the first temperature comparison signal, the base of the NPN-type triode Q1 inputs a high level, the triode Q1 is in a conducting state, the KM1 is electrified, the thyristor BCR is conducted, the normally-open contact switch KM1-1 is electrified in a closed state, the switch unit 8 outputs an opening signal to the power supply loop of the heat dissipation fan 9, the power supply loop of the heat dissipation fan 9 is conducted, the heat dissipation fan 9 is electrified, the relay 9 is conducted, and the air-cooled relay 1 is conducted;

when the temperature inside the casing 1 is reduced, the resistance value of the thermistor RT is reduced, the voltages at two ends of the thermistor RT are reduced, a low level is output by a connection node of the thermistor RT and the first resistor R1, the temperature detection signal output by the detection unit 6 is reduced, the temperature detection signal input by the comparison unit 7 is reduced, a low level is input by a positive phase input end of the comparator N1, the voltage input by the positive phase input end of the comparator N1 is smaller than the voltage input by an inverse phase input end of the comparator N1, the low level is output by an output end of the comparator N1, the second temperature comparison signal is output by the comparison unit 7, the second temperature comparison signal is received by the switch unit 8, a low level is input by a base of the NPN-type triode Q1, the triode Q1 is in a non-conducting state, the relay KM1 is not conducting, the thyristor BCR is not conducting, the normally-open contact switch KM1-1 is in a non-conducting state when power is off, the switch unit 8 outputs a disconnection signal to a power supply loop of the heat dissipation fan 9, the power supply loop of the heat dissipation fan 9 is disconnected, and the heat dissipation fan 9 is disconnected.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A portable wireless amplified receiver, characterized by: the portable audio decoding device comprises a shell (1), a containing groove (11) is formed in the top of the shell (1), a sliding assembly (4) is arranged in the containing groove (11), a USB interface (2) is arranged on the sliding assembly (4), an audio interface (3) is arranged at the bottom of the shell (1), a circuit board (5) is arranged in the shell (1), the USB interface (2) is electrically connected to the circuit board (5), the USB interface (2) is used for being connected with an audio playing device in an inserting mode to enable the audio playing device to supply power to the circuit board (5), a Bluetooth module (51) and an audio decoding module (52) are arranged on the circuit board (5), the Bluetooth module (51) is used for being in Bluetooth wireless connection with a terminal device and receiving audio data output by the terminal device, the audio decoding module (52) is coupled to the Bluetooth module (51) to receive the audio data, the audio interface (3) is electrically connected to the audio decoding module (52), the audio decoding module (52) is used for decoding and returning original audio data to obtain audio, and the audio interface (3) is used for being connected with the audio playing device to transmit the decoded and restored audio to the audio playing device.

2. A portable wireless amplified receiver according to claim 1, wherein: the Bluetooth module (51) comprises a chip U1, the chip U1 comprises a power management end, a switch end, an interface end and a wireless radio frequency end, the power management end of the chip U1 is coupled to a system power supply to input system voltage, the switch end of the chip U1 is coupled with a switch SW1, the other end of the switch SW1 is coupled to the system power supply, the interface end of the chip U1 is coupled to a USB interface (2), the wireless radio frequency end of the chip U1 is coupled with a crystal oscillator Y1, and the other end of the crystal oscillator Y1 is grounded.

3. A portable wireless amplified receiver according to claim 1, wherein: slide subassembly (4) are including sliding seat (41) and sliding block (42), the slide rail has been seted up on the inside wall of holding tank (11), sliding seat (41) sliding connection is in the slide rail, sliding block (42) are including dead lever (421) and promote piece (422), the one end and the promotion piece (422) fixed connection of dead lever (421), the one end that promotes piece (422) is kept away from in dead lever (421) passes casing (1) and is connected with sliding seat (41), seted up on casing (1) and supplied gliding spout (12) of dead lever (421).

4. A portable wireless amplified receiver according to claim 3, wherein: the top of the pushing block (422) is arranged in a concave mode towards the direction of the fixing rod (421), and a plurality of anti-slip strips are arranged on the top of the pushing block (422).

5. A portable wireless amplified receiver according to claim 1, wherein: be provided with the broadcast subassembly on casing (1) and switch button (15), the broadcast subassembly includes loudspeaker (13), loudspeaker (13) are connected with audio decoding module (52) and audio playback equipment electricity respectively, loudspeaker (13) are used for playing the audio frequency of audio decoding module (52) output and the audio frequency of audio playback equipment output, switch button (15) and establish ties between loudspeaker (13) and audio decoding module (52), and establish ties between loudspeaker (13) and audio playback equipment, switch button (15) still establish ties between audio interface (3) and audio playback equipment, switch button (15) are used for switching audio data transmission route.

6. A portable wireless amplified receiver according to claim 1, wherein: the heat dissipation device is characterized in that a heat dissipation hole (14) is formed in the outer side wall of the casing (1), a heat dissipation fan (9) is arranged inside the casing (1), the heat dissipation fan (9) is located at the heat dissipation hole (14), a temperature monitoring circuit used for controlling the power on and off of the heat dissipation fan (9) is further arranged on the circuit board (5), the heat dissipation fan (9) is electrically connected with the circuit board (5), the temperature monitoring circuit comprises a detection unit (6), a comparison unit (7) and a switch unit (8), the output end of the detection unit (6) is coupled to the comparison unit (7) to output a temperature detection signal to the comparison unit (7), the comparison unit (7) is provided with a temperature threshold value, the output end of the comparison unit (7) is coupled to the switch unit (8), when the temperature detection signal is greater than the temperature threshold value, the comparison unit (7) outputs a first temperature comparison signal to the switch unit (8), when the temperature detection signal is less than the temperature threshold value, the comparison unit (7) outputs a second temperature comparison signal to the switch unit (8), the output end of the switch unit (8) is coupled to a power supply loop, the switch unit receives the first temperature comparison signal, and the heat dissipation fan (9) is used for starting the heat dissipation fan (9), and the heat dissipation fan (9) outputs the second temperature comparison signal to the heat dissipation fan (9) when the heat dissipation signal to start-up, the heat dissipation fan (9) and the heat dissipation fan (9) is started (9) The heat dissipation fan (9) is not started when the power supply loop is cut off.

7. A portable wireless amplified receiver according to claim 6, characterized in that: detection element (6) include temperature sensor, temperature sensor installs inside casing (1), temperature sensor includes thermistor RT, thermistor RT establishes ties has first resistance R1, first resistance R1's the other end is coupled in the power, thermistor RT's the other end ground connection, thermistor RT and first resistance R1's connected node is coupled in comparison unit (7).

8. A portable wireless amplified receiver according to claim 7, wherein: the comparison unit (7) includes comparator N1, the first input end of comparator N1 is coupled in thermistor RT and first resistance R1's connected node, second input end series connection has second resistance R2 and third resistance R3 in proper order of comparator N1, the other end of third resistance R3 is coupled in the threshold power, fourth resistance R4 is coupled in the connected node of second resistance R2 and third resistance R3, the other end ground connection of fourth resistance R4, the output of comparator N1 is coupled in switching element (8).

9. A portable wireless amplified receiver according to claim 8, wherein: the switch unit (8) comprises an NPN type triode Q1, a thyristor BCR and a relay KM1, wherein the base electrode of the triode Q1 is coupled to the output end of the comparator N1, the collector electrode of the triode Q1 is coupled to a power supply after being connected with the relay KM1 in series, the emitter electrode of the triode Q1 is grounded, the control electrode of the thyristor BCR is coupled to the emitter electrode of the triode Q1, the relay KM1 comprises a normally open contact switch KM1-1, and the thyristor BCR and the normally open contact switch KM1-1 are connected with a power supply loop of the heat dissipation fan (9) in series.