CN209627624U

CN209627624U - A kind of wireless Bluetooth headsets

Info

Publication number: CN209627624U
Application number: CN201920234616.3U
Authority: CN
Inventors: 何三馀
Original assignee: SHENZHEN DAYSTAR CONNECT TECHNOLOGY Co Ltd
Current assignee: SHENZHEN DAYSTAR CONNECT TECHNOLOGY Co Ltd
Priority date: 2019-02-25
Filing date: 2019-02-25
Publication date: 2019-11-12
Anticipated expiration: 2029-02-25

Abstract

The utility model relates to a kind of wireless Bluetooth headsets, including Bluetooth chip, power supply circuit, switching circuit, key circuit, voice pickup circuit, audio playing circuits；It is wirelessly connected by Bluetooth chip and mobile terminal, receives the audio file that mobile terminal is sent, and be converted into the first audio signal and export to audio playing circuit, the first audio signal is converted to sound by audio playing circuit；And the sound in air is picked up using voice pickup circuit and is converted to the second audio signal, and the second audio signal is converted by digital signal by Bluetooth chip and is sent to mobile terminal；And it is equipped with the on/off that key circuit increases for volume with volume down and control Bluetooth chip, i.e. machine open/close；Power supply circuit is connect for providing power supply for Bluetooth chip with switching circuit；Realize that circuit is simple, it is small in size, it is at low cost.

Description

A kind of wireless Bluetooth headsets

Technical field

The utility model relates to bluetooth headset technical fields, more specifically to a kind of wireless Bluetooth headsets.

Background technique

The demand communicated now with people to wireless penetration is higher and higher, and the application range of bluetooth headset is also increasingly wider General, bluetooth headset is a kind of small device based on Bluetooth technology, and Bluetooth technology is applied and facilitates use on hand-free bluetooth headset Family uses, and allows user that can exempt impeding for irritating electric wire, comfortable ground easily call in various ways, since bluetooth headset is asked It has been always the good tool of Mobile Commerce race raising efficiency since generation.

But the most complexity of circuit of existing bluetooth headset causes volume big, has to reduce battery in certain space Volume, to affect stand-by time.

Utility model content

The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit letter Single, small in size wireless Bluetooth headsets.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

Construct a kind of wireless Bluetooth headsets, including Bluetooth chip, power supply circuit, switching circuit, key circuit, voice pickup Circuit, audio playing circuit；Its kind, the Bluetooth chip connect with the audio playing circuit and the voice pickup circuit respectively It connects；The Bluetooth chip receives the audio file that mobile terminal is sent, and be converted into for being wirelessly connected with mobile terminal First audio signal is exported to audio playing circuit, and the audio playing circuit is used to first audio signal being converted to sound Sound；The voice pickup circuit for picking up the sound in air and being converted to the second audio signal, also use by the Bluetooth chip The mobile terminal is sent in second audio signal is converted into digital signal；The key circuit and the bluetooth core Piece connection increases for volume and volume down, the key circuit are also connect with the switching circuit for controlling the bluetooth The on/off of chip；The power supply circuit is connect for providing power supply for the Bluetooth chip with the switching circuit.

Wireless Bluetooth headsets described in the utility model, wherein the power supply circuit includes USB interface, battery, and the one or three Pole pipe, first diode, the second diode, light emitting diode；The USB interface is used to electrically connect as institute with external charger Battery charging is stated, the 1 pin connection of the USB interface connects the anode of the first diode, and the first diode is born Pole is connected with first resistor, and the other end of the first resistor is connect with the anode of the battery, the cathode ground connection of the battery, 4 pins of the USB interface are also grounded；The emitter of first triode is connect with 1 pin of the USB interface, described The base stage of first triode is connected with second resistance, and the other end of the second resistance is connect with the anode of the battery, described The collector of first triode connects the cathode of second diode, anode and the Bluetooth chip of second diode The end ADC/SDDAT/PA1 connection；The collector of first triode is also connected with 3rd resistor, the 3rd resistor it is another One end is connect with the anode of the light emitting diode, the cathode ground connection of the light emitting diode；The battery anode also with institute State the anode connection of switching circuit.

Wireless Bluetooth headsets described in the utility model, wherein the switching circuit includes the second triode, field-effect Pipe, third diode；The drain electrode of the field-effect tube and the positive of the battery connect and are also connected with the 4th resistance, and described the The other end of four resistance is connect with the grid of the field-effect tube, the collection of the grid of the field-effect tube and second triode Electrode is connected and is also connect with the anode of the third diode, the LDO_ of the source electrode of the field-effect tube and the Bluetooth chip The connection of the end IN；The cathode of the third diode is connect with the key circuit；The base stage of second triode is connected with The other end of five resistance and the 6th resistance, the 5th resistance is connect with the end SD0CLK/PA8/PA3 of the Bluetooth chip, institute The other end for stating the 6th resistance is connect with the emitter of second triode, the emitter ground connection of second triode.

Wireless Bluetooth headsets described in the utility model, wherein the key circuit include the first key, the second key, Third key, the 4th diode；First key is used to control the on/off of the Bluetooth chip, and second key is used In volume down, the third key increases for volume；First key and second key and the third are pressed Key is grounded, and the other end of first key connects the cathode of the third diode；The other end of first key is also It is connect with the cathode of the 4th diode, the anode of the 4th diode is connected with the 7th resistance, the 7th resistance The other end is connected with first capacitor, the other end ground connection of the first capacitor；The other end of second key is connected with the 8th Resistance, the other end of the third key are connected with the 9th resistance, and the other end of the 9th resistance is electric with the described 8th respectively The connection of the other end of resistance and the 7th resistance, and it is also connected with the tenth resistance, the other end of the tenth resistance and the bluetooth The end VDDIO of chip connects；The other end of 7th resistance and the 8th resistance and the 9th resistance with it is described The end ADC13/PR1 of Bluetooth chip connects.

Wireless Bluetooth headsets described in the utility model, wherein the voice pickup circuit includes microphone, the second capacitor, Eleventh resistor；The first end of the microphone connects second capacitor and the eleventh resistor, second capacitor it is another One end is connect with the end AUXR2/MIC/PC15 of the Bluetooth chip, the other end of the eleventh resistor and the Bluetooth chip The end DACVDD connection；The second end of the microphone is grounded.

Wireless Bluetooth headsets described in the utility model, wherein the audio playing circuit includes the first loudspeaker and the Two loudspeakers, the first end of first loudspeaker are connect with the end DACR of the Bluetooth chip, and the of first loudspeaker Two ends connect with the first end of second loudspeaker and also connect with the end VCOMO of the Bluetooth chip；Second loudspeaking The second end of device is connect with the end DACL of the Bluetooth chip.

The utility model has the beneficial effects that: being wirelessly connected by Bluetooth chip and mobile terminal, movement is received The audio file that terminal is sent, and be converted into the first audio signal and export to audio playing circuit, audio playing circuit is by first Audio signal is converted to sound；And pick up the sound in air using voice pickup circuit and be converted to the second audio signal, And the second audio signal is converted by digital signal by Bluetooth chip and is sent to mobile terminal；And it is equipped with key circuit and is used for sound Amount increases and the on/off of volume down and control Bluetooth chip, i.e. machine open/close；Power supply circuit connect use with switching circuit In providing power supply for Bluetooth chip；Realize that circuit is simple, it is small in size, it is at low cost.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below in conjunction with attached drawing and reality Applying example, the utility model is described in further detail, and the accompanying drawings in the following description is only section Example of the invention, for this For the those of ordinary skill of field, without creative efforts, it is attached to can also be obtained according to these attached drawings other Figure:

Fig. 1 is the circuit diagram of the Bluetooth chip of the wireless Bluetooth headsets of the utility model preferred embodiment；

Fig. 2 is the circuit diagram of the power supply circuit of the wireless Bluetooth headsets of the utility model preferred embodiment；

Fig. 3 is the circuit diagram of the switching circuit of the wireless Bluetooth headsets of the utility model preferred embodiment；

Fig. 4 is the circuit diagram of the key circuit of the wireless Bluetooth headsets of the utility model preferred embodiment；

Fig. 5 is the circuit diagram of the voice pickup circuit of the wireless Bluetooth headsets of the utility model preferred embodiment；

Fig. 6 is the circuit diagram of the audio playing circuit of the wireless Bluetooth headsets of the utility model preferred embodiment.

Specific embodiment

It is practical below in conjunction with this in order to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Technical solution in new embodiment carries out clear, complete description, it is clear that described embodiment is the portion of the utility model Point embodiment, rather than whole embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not paying creation Property labour under the premise of every other embodiment obtained, belong to the protection scope of the utility model.

The wireless Bluetooth headsets of the utility model preferred embodiment are as shown in Figure 1, simultaneously refering to Fig. 2 to Fig. 6, including bluetooth Chip U1, power supply circuit 10, switching circuit 20, key circuit 30, voice pickup circuit 40, audio playing circuit 50；Bluetooth core Piece U1 is connect with audio playing circuit 50 and sound pick-up circuit 40 respectively；Bluetooth chip U1 is used to carry out with mobile terminal wireless Connection receives the audio file that mobile terminal is sent, and is converted into the first audio signal and exports to audio playing circuit 50, audio Playing circuit 50 is used to the first audio signal being converted to sound；Voice pickup circuit 40 is used to pick up the sound in air and turns It is changed to the second audio signal, Bluetooth chip U1 is also used to the second audio signal being converted into digital signal to be sent to mobile terminal； Key circuit 30 is connect with Bluetooth chip U1 also to be connect with switching circuit 20 for volume increase and volume down, key circuit 30 For controlling the on/off of Bluetooth chip U1；Power supply circuit 10 is connect for providing electricity for Bluetooth chip U1 with switching circuit 20 Power supply；Realize that circuit is simple, it is small in size, it is at low cost.

As shown in Fig. 1 and Fig. 2 and Fig. 3, power supply circuit 10 includes USB interface J1, battery BT1, the first triode Q1, the One diode D2, the second diode D1, light emitting diode D4；USB interface J1 is used to electrically connect as battery with external charger BT1 charging, the anode of the 1 pin connection connection first diode D2 of USB interface J1, the cathode of first diode D2 are connected with the The other end of one resistance R3, first resistor R3 are connect with the anode of battery BT1, the cathode ground connection of battery BT1, and the 4 of USB interface J1 Pin is also grounded；The emitter of first triode Q1 is connect with 1 pin of USB interface J1, the base stage connection of the first triode Q1 There is a second resistance R2, the other end of second resistance R2 connect with the anode of battery BT1, and the collector of the first triode Q1 connects the The anode of the cathode of two diode D1, the second diode D1 is connect with the end ADC/SDDAT/PA1 of Bluetooth chip U1；One or three pole The collector of pipe Q1 is also connected with 3rd resistor R1, and the other end of 3rd resistor R1 connect with the anode of light emitting diode D4, sends out The cathode of optical diode D4 is grounded；The anode of battery BT1 is also connect with the anode of switching circuit 20；2 pins of USB interface J1 are also It can be connect with the end AUX1L/PC12/USBDM of Bluetooth chip U1,3 pins of USB interface J1 can also be with Bluetooth chip U1's The connection of the end AUX1R/PC13/USBDP, realizes and carries out wire communication with mobile terminal, play audio file in a wired manner, full The different use demand of foot；USB interface J1 can be USB C-Type type interface or Micro-USB type interface simultaneously.

As shown in Fig. 1 and Fig. 3 and Fig. 4, switching circuit 20 includes the second triode Q3, field-effect tube Q2, the three or two pole Pipe D6；The drain electrode of field-effect tube Q2 connect and is also connected with the 4th resistance R4 with the anode of battery BT1, and the 4th resistance R4's is another End is connect with the grid of field-effect tube Q2, and the grid of field-effect tube Q2 is connect with the collector of the second triode Q3 and and and third The anode connection of diode D6, the source electrode of field-effect tube Q2 are connect with the end LDO_IN of Bluetooth chip U1；Third diode D6's Cathode is connect with key circuit 30；The base stage of second triode Q3 is connected with the 5th resistance R6 and the 6th resistance R8, the 5th resistance The other end of R6 is connect with the end SD0CLK/PA8/PA3 of Bluetooth chip U1, the other end of the 6th resistance R8 and the second triode Q3 Emitter connection, the second triode Q3 emitter ground connection；The on/off of Bluetooth chip U1 is controlled using field-effect tube Q2, To save electric energy, extend stand-by time.

As shown in figures 1 and 3, key circuit 30 includes the first key K1, the second key K2, third key K3, and the four or two Pole pipe D9；First key K1 is used to control the on/off of Bluetooth chip U1, and the second key K2 is used for volume down, third key K3 increases for volume；First key K1 and the second key K2 and third key K3 are grounded, the other end of the first key K1 Connect the cathode of third diode D6；The other end of first key K1 is also connect with the cathode of the 4th diode D9, the four or two pole The anode of pipe D9 is connected with the 7th resistance R11, and the other end of the 7th resistance R11 is connected with first capacitor C16, first capacitor C16 The other end ground connection；The other end of second key K2 is connected with the 8th resistance R9, and the other end of third key K3 is connected with the 9th Resistance R10, the other end of the 9th resistance R10 is connect with the other end of the 8th resistance R9 and the 7th resistance R11 respectively, and is also connected It is connected to the tenth resistance R12, the other end of the tenth resistance R12 is connect with the end VDDIO of Bluetooth chip U1；7th resistance R11 and The other end of eight resistance R9 and the 9th resistance R10 is connect with the end ADC13/PR1 of Bluetooth chip U1；Circuit is simple, volume It is small.

As shown in Figure 1 and Figure 5, voice pickup circuit 40 includes microphone MIC1, the second capacitor C15, eleventh resistor R7；Miaow The first end of head MIC1 connects the other end of the second capacitor C15 and eleventh resistor R7, the second capacitor C15 with Bluetooth chip U1's The connection of the end AUXR2/MIC/PC15, the other end of eleventh resistor R7 are connect with the end DACVDD of Bluetooth chip U1；Microphone MIC1 Second end ground connection；Circuit is simple, small in size.

As shown in figures 1 to 6, audio playing circuit 50 includes the first loudspeaker SPL1 and the second loudspeaker SPR1, and first The first end of loudspeaker SPL1 is connect with the end DACR of Bluetooth chip U1, the second end and the second loudspeaker of the first loudspeaker SPL1 The first end of SPR1 is connected and is also connect with the end VCOMO of Bluetooth chip U1；The second end and bluetooth core of second loudspeaker SPR1 The end DACL of piece U1 connects；Circuit is simple, small in size.

It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.

Claims

1. a kind of wireless Bluetooth headsets, including Bluetooth chip, power supply circuit, switching circuit, key circuit, voice pickup circuit, Audio playing circuit；It is characterized in that, the Bluetooth chip respectively with the audio playing circuit and the voice pickup circuit Connection；The Bluetooth chip receives the audio file that mobile terminal is sent, and convert for being wirelessly connected with mobile terminal It exports at the first audio signal to audio playing circuit, the audio playing circuit is for being converted to first audio signal Sound；The voice pickup circuit is for picking up the sound in air and being converted to the second audio signal, and the Bluetooth chip is also The mobile terminal is sent to for second audio signal to be converted into digital signal；The key circuit and the bluetooth Chip connection increases for volume and volume down, the key circuit are also connect with the switching circuit for controlling the indigo plant The on/off of tooth chip；The power supply circuit is connect with the switching circuit to be supplied for providing electric power for the Bluetooth chip It answers.

2. wireless Bluetooth headsets according to claim 1, which is characterized in that the power supply circuit includes USB interface, electricity Pond, the first triode, first diode, the second diode, light emitting diode；The USB interface is used for and external charger It electrically connects as the battery to charge, the anode of the 1 pin connection connection first diode of the USB interface, described first The cathode of diode is connected with first resistor, and the other end of the first resistor is connect with the anode of the battery, the battery Cathode ground connection, 4 pins of the USB interface are also grounded；The emitter of first triode draws with the 1 of the USB interface Foot connection, the base stage of first triode are connected with second resistance, and the other end of the second resistance and the battery are just Pole connection, the collector of first triode connect the cathode of second diode, the anode of second diode with The end ADC/SDDAT/PA1 of the Bluetooth chip connects；The collector of first triode is also connected with 3rd resistor, described The other end of 3rd resistor is connect with the anode of the light emitting diode, the cathode ground connection of the light emitting diode；The battery Anode also with the switching circuit anode connect.

3. wireless Bluetooth headsets according to claim 2, which is characterized in that the switching circuit includes the second triode, Field-effect tube, third diode；The drain electrode of the field-effect tube connect and is also connected with the 4th resistance with the anode of the battery, The other end of 4th resistance is connect with the grid of the field-effect tube, the grid of the field-effect tube and the two or three pole The collector of pipe is connected and is also connect with the anode of the third diode, the source electrode of the field-effect tube and the Bluetooth chip The end LDO_IN connection；The cathode of the third diode is connect with the key circuit；The base stage of second triode connects It is connected to the 5th resistance and the 6th resistance, the other end of the 5th resistance and the end SD0CLK/PA8/PA3 of the Bluetooth chip connect It connects, the other end of the 6th resistance is connect with the emitter of second triode, and the emitter of second triode connects Ground.

4. wireless Bluetooth headsets according to claim 3, which is characterized in that the key circuit includes the first key, the Two keys, third key, the 4th diode；First key is used to control the on/off of the Bluetooth chip, and described the Two keys are used for volume down, and the third key increases for volume；First key and second key and institute It states third key to be grounded, the other end of first key connects the cathode of the third diode；First key The other end is also connect with the cathode of the 4th diode, and the anode of the 4th diode is connected with the 7th resistance, and described The other end of seven resistance is connected with first capacitor, the other end ground connection of the first capacitor；The other end of second key connects Be connected to the 8th resistance, the other end of the third key is connected with the 9th resistance, the other end of the 9th resistance respectively with institute State the other end connection of the 8th resistance and the 7th resistance, and be also connected with the tenth resistance, the other end of the tenth resistance with The end VDDIO of the Bluetooth chip connects；The other end of 7th resistance and the 8th resistance and the 9th resistance It is connect with the end ADC13/PR1 of the Bluetooth chip.

5. wireless Bluetooth headsets according to claim 1, which is characterized in that the voice pickup circuit includes microphone, the Two capacitors, eleventh resistor；The first end of the microphone connects second capacitor and the eleventh resistor, second electricity The other end of appearance is connect with the end AUXR2/MIC/PC15 of the Bluetooth chip, the other end of the eleventh resistor and the indigo plant The end DACVDD of tooth chip connects；The second end of the microphone is grounded.

6. wireless Bluetooth headsets according to claim 1, which is characterized in that the audio playing circuit includes the first loudspeaking Device and the second loudspeaker, the first end of first loudspeaker are connect with the end DACR of the Bluetooth chip, first loudspeaking The second end of device connect with the first end of second loudspeaker and also connect with the end VCOMO of the Bluetooth chip；Described The second end of two loudspeakers is connect with the end DACL of the Bluetooth chip.