CN107770662B - Automatic charging and switching circuit - Google Patents
Automatic charging and switching circuit Download PDFInfo
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- CN107770662B CN107770662B CN201610705224.1A CN201610705224A CN107770662B CN 107770662 B CN107770662 B CN 107770662B CN 201610705224 A CN201610705224 A CN 201610705224A CN 107770662 B CN107770662 B CN 107770662B
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- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims abstract description 37
- 230000009471 action Effects 0.000 claims abstract description 17
- 238000004146 energy storage Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000005236 sound signal Effects 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012827 research and development Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1025—Accumulators or arrangements for charging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a realization method of automatic charging and switching on and off, which comprises the following steps: the conducted storage detection port triggers the detection circuit to output a charging signal to the second charging management module, and voltage is output to the charging input port through the charging output port so as to realize charging action; the on-off detection port after being conducted outputs a shutdown signal to the PCBA of the electronic terminal to perform shutdown action; when the electronic terminal moves out of the charging terminal, the on-off detection port is disconnected with the storage detection port, and the on-off detection port outputs a starting signal to the PCBA board of the electronic terminal to perform starting action. The invention also discloses an automatic charging and switching-on and switching-off circuit. The invention combines the charging control circuit and the on-off control circuit with each other through one control circuit, thereby not only realizing automatic power-off during charging and automatic power-on during disconnection of charging, reducing energy consumption, but also reducing the volume of the circuit board and the design difficulty thereof.
Description
Technical Field
The invention relates to a realization method and a circuit for automatic charging and switching on and off.
Background
At present, the existing automatic implementation methods of charging and switching on and off of the electronic terminal are mutually independent and separated, and circuit parts are required to be respectively and independently designed, so that the size of a PCB (printed circuit board) is increased, the design complexity is also increased, and faults are easily caused due to excessive circuits and action signals.
The left earphone and the right earphone of the existing Bluetooth earphone or wireless earphone are connected by leads, so that people feel intangible constraint during use, and the use experience is reduced; because the in-ear wireless earphone has smaller volume, if the micro USB interface of the traditional earphone is used for charging, the whole space of the wireless earphone is too occupied, and the micro USB interface is not placed in enough space on the PCB; the existing in-ear wireless earphone has small volume, is easy to lose when not in use, is not easy to carry, and is easy to cause unnecessary trouble to a user; because AD/DA conversion requires time, when the left ear and the right ear of the wireless earphone listen to music or telephone, the time of the left channel and the right channel is not synchronous, and a time delay condition occurs, so that the tone quality is reduced, and the use experience is further reduced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an implementation method for automatic charging and switching on/off, which combines a charging control circuit and a switching on/off control circuit to be realized through one control circuit, so that the automatic switching off during charging is realized, the automatic switching on during switching off during charging is realized, the energy consumption is reduced, and the size of a circuit board and the design difficulty of the circuit board are reduced. The invention also provides an automatic charging and switching-on and switching-off circuit thereof.
The technical problems to be solved by the invention are realized by the following technical scheme:
the method for realizing automatic charging and switching on and off comprises the following steps:
the electronic terminal is arranged on the charging terminal, and a charging input port and an on-off detection port of the electronic terminal are respectively communicated with a charging output port and a storage detection port of the charging terminal;
The storage detection port after being conducted triggers the detection circuit to output a charging signal to the second charging management module, the second charging management module outputs voltage through the charging output port, and the charging input port receives the charging voltage and transmits the charging voltage to the battery of the electronic terminal, so that charging action is realized;
the on-off detection port after being conducted outputs a shutdown signal to a PCBA board of the electronic terminal to perform shutdown action; when the electronic terminal moves out of the charging terminal, the on-off detection port is disconnected with the storage detection port, and the on-off detection port outputs a starting signal to the PCBA board of the electronic terminal to perform starting action.
The automatic charging and switching circuit comprises an electronic terminal and a charging terminal, wherein the electronic terminal comprises a PCBA board, a first charging management module, a battery, a switching on/off detection port and a charging input port, the switching on/off detection port is connected with a switching on/off signal detection port of the PCBA board through a matching circuit, and the charging input port is connected with the battery through the first charging management module; the charging terminal comprises a storage detection port, a detection circuit, a second charging management module and a charging output port which are sequentially connected; when the electronic terminal is arranged in the charging terminal, the on-off detection port is correspondingly communicated with the storage detection port, and the charging input port is correspondingly communicated with the charging output port.
Further, the matching circuit comprises a bias resistor R1 and a triode Q1.
Further, a charging protection circuit is further connected between the charging input port and the first charging management module.
Further, the first charge management module is integrated on the PCBA board.
Further, the detection circuit is a resistor R2.
Further, the charging terminal further comprises a power input port and/or an energy storage module, and the power input port and the energy storage module are connected with the second charging management module.
Further, the electronic terminal is an earphone, an interphone, a microphone, a mobile phone or a tablet personal computer.
The invention has the following beneficial effects: the invention combines the charging control circuit and the on-off control circuit with each other through one control circuit, thereby not only realizing automatic power-off during charging and automatic power-on during disconnection of charging, reducing energy consumption, but also reducing the volume of the circuit board and the design difficulty thereof.
Drawings
FIG. 1 is a schematic diagram of an automatic charging and switching on and off circuit according to the present invention;
FIG. 2 is a functional block diagram of a wireless headset of the present invention;
FIG. 3 is a six-view diagram of a left and right earphone in a wireless earphone according to the present invention, both adopting a mirror-symmetrical design;
FIG. 4 is a schematic diagram of a PCBA mirror image implementation of left and right earphones in the wireless earphone of the present invention;
FIGS. 5a and 5b are schematic block diagrams of left and right channel sound transmissions in a wireless headset of the prior art and of the present invention, respectively;
The portable electronic device comprises a shell, a shell lower cover, a shell upper cover, a loudspeaker, a PCBA board, a wireless antenna, a charging module, a microphone, a key module and a first magnet, wherein the shell upper cover is arranged on the shell upper cover, the loudspeaker is arranged on the shell lower cover, and the loudspeaker is arranged on the shell upper cover.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the present embodiment provides an automatic charging and switching circuit, which includes an electronic terminal and a charging terminal, where the electronic terminal includes a PCBA board, a first charging management module, a battery, a switching ON/off detection port (det_term) and a charging input port (CHARG _term), the switching ON/off detection port is connected with a switching ON/off signal detection port (on_det) of the PCBA board through a matching circuit, the charging input port is connected with the battery through the first charging management module, and the battery is connected with the PCBA board; the charging terminal comprises a storage detection port (DET_TER1), a detection circuit, a second charging management module (U1) and a charging output port (CHARG _TER1) which are connected in sequence; when the electronic terminal is arranged in the charging terminal, the on-off detection port is correspondingly communicated with the storage detection port, and the charging input port is correspondingly communicated with the charging output port.
As a preferred mode, the matching circuit includes a bias resistor R1 and a transistor Q1, and when the transistor Q1 is stopped, the on-off detection port is guaranteed to be at a low level. The detection circuit is a resistor R2 and can be integrated on the second charge management module to serve as an internal resistor; the second charging management module is connected with the charging output port through an output voltage switching circuit. The output voltage switching circuit includes a resistor R4 and a transistor Q2, as shown in fig. 1. The resistor R3 is a pull-down resistor.
And a charging protection circuit is further connected between the charging input port and the first charging management module. The charging terminal further comprises a power input port and/or an energy storage module, wherein the power input port and the energy storage module are connected with the second charging management module, and can directly charge the electronic terminal through an external power supply or charge the electronic terminal with the charging terminal as a mobile power supply.
It should be noted that the first charging management module may be integrated on the PCBA board, and also be a chip alone, and this embodiment is preferably integrated on the PCBA board.
The electronic terminal is an electronic device such as an earphone, an interphone, a microphone, a mobile phone or a tablet personal computer, but is not limited to the above.
The method for realizing automatic charging and switching on and off comprises the following steps:
(1) The electronic terminal is arranged on the charging terminal, and a charging input port and an on-off detection port of the electronic terminal are respectively communicated with a charging output port and a storage detection port of the charging terminal;
(2) The storage detection port after being conducted triggers the detection circuit to output a charging signal (the charging signal is preferably but not limited to be high level) to the second charging management module, the second charging management module outputs voltage through the charging output port, and the charging input port receives the charging voltage and transmits the charging voltage to the battery of the electronic terminal, so that charging action is realized;
(3) The on-off detection port after being conducted outputs a shutdown signal (preferably but not limited to low level) to the PCBA of the electronic terminal to perform shutdown action; when the electronic terminal moves out of the charging terminal, the on-off detection port is disconnected with the storage detection port, and the on-off detection port outputs a starting signal (preferably but not limited to a high level) to the PCBA board of the electronic terminal to perform starting action.
When the on-off detection port is connected with the storage detection port, the on-off detection port is pulled to be low level, the optimal time is more than 5s, namely, the low level time of the on-off signal detection port of the PCBA board is longer than 5s, the on-off action is started, and the automatic off function is realized. When the on-off detection port is disconnected with the storage detection port, the on-off detection port level automatically changes from low level to high level under the condition that the resistor is connected to the on-off detection port, the on-off signal detection port of the PCBA board is high level, the starting-up action is started, and the automatic starting-up function is realized.
The charging control circuit and the on-off control circuit are mutually combined and realized through one control circuit, so that the automatic power-off during charging is realized, the automatic power-on during charging is disconnected, the energy consumption is reduced, and the size of the circuit board and the design difficulty of the circuit board are reduced.
The application of the automatic charging and switching circuit will be further described by taking an earphone as an example of the electronic terminal. However, the present invention is not limited thereto, and the automatic charging and switching circuit can be easily applied to other electronic terminals, such as microphones, interphones, remote controllers, mobile phones, pads, and the like, by those skilled in the art.
Example 2
As shown in fig. 1 and 2, an in-ear wireless earphone is shown, which comprises a left earphone, a right earphone and a charging storage box, wherein the charging storage box is used for storing the left earphone and the right earphone and respectively charging the left earphone and the right earphone.
The left earphone comprises a shell, a loudspeaker 2, a charging module, a battery, a PCBA board 3 and a wireless antenna 4, wherein the loudspeaker 2 and the charging module are fixed on a lower cover 11 of the shell, the battery is positioned above the charging module, the PCBA board 3 is positioned above the battery, the wireless antenna 4 is fixed on an upper cover 12 of the shell, and the PCBA board 3 is respectively connected with the loudspeaker 2, the charging module and the battery; the charging module 5 comprises a startup and shutdown detection port (DET_TERM) and a charging input port (CHARG _TERM), wherein the startup and shutdown detection port is connected with a startup and shutdown signal detection port (ON_DET) of the Bluetooth module of the PCBA board 3 through a matching circuit, and the charging input port is connected with a battery through a first charging management module of the PCBA board 3; the wireless antenna 4 contacts with the spring piece 31 on the PCBA plate 3 through the golden finger at the end of the antenna, thus completing the input and output of wireless signals.
Preferably, the matching circuit includes a bias resistor R1 and a transistor Q1, and when the transistor Q1 is stopped, the on-off detection port is guaranteed to be at a low level.
The left ear and the right ear of the person are symmetrical, and the ear contours are also symmetrically arranged, preferably, the right earphone and the left earphone have the same structure, as shown in fig. 3, preferably, but not limited to, adopting a symmetrical structure design, and the included electronic devices and the installation positions thereof are the same as those of the left earphone, and the structure of the right earphone is not described in detail. The left earphone and the right earphone are in communication connection through the wireless antenna 4, and are not required to be connected through wires, so that the true wireless of the earphone is realized.
The charging storage box comprises a left storage box and a right storage box and is used for respectively storing a left earphone and a right earphone and automatically charging the earphone. The left storage box comprises a storage detection port (DET_TER1), a detection circuit, a second charging management module (U1) and a charging output port (CHARG _TER1) which are connected in sequence; after the left earphone is placed in the left storage box, the on-off detection port is correspondingly connected with the storage detection port, and the charging output port is correspondingly and electrically connected with the charging input port. The storage detection port is used for being connected with the on-off detection port to detect whether the earphone is placed in the storage box or not; the detection circuit is used for generating a charging signal and sending the charging signal to the second charging management module, and the charging signal is preferably but not limited to a high level; the second charging management module is used for receiving a charging signal and outputting a power supply to the charging output port; the charging output port is used for transmitting charging voltage to the charging input port connected with the charging output port to finish the output of the power supply. The right storage box has the same structure as the left storage box, and will not be described in detail herein. Preferably, as shown in fig. 1, the detection circuit is a resistor R2; the second charging management module is connected with the charging output port through an output voltage switching circuit. The output voltage switching circuit includes a resistor R4 and a transistor Q2, as shown in fig. 1.
In a preferred mode, the connection modes of the charging input port, the charging output port, the on-off detection port and the storage detection port are all preferably golden finger connection modes, namely, the wireless earphone and the charging storage box realize power transmission of the wireless earphone and the charging storage box through the golden finger charging mode. The connection mode can also be a contact, plug-in connection or spring plate connection mode.
Further improved, the charging module 5 further comprises a charging protection circuit, which is connected with the charging input port and the first charging management circuit, so as to receive the charging voltage input through the charging input port and charge the battery.
Further improved, the left earphone and/or the right earphone further comprise a microphone 6, which is connected with the PCBA 3 and is used for picking up voice information to realize the conversation function of the earphone.
Further improvements are made in that the left and/or right earphone further comprises a key module 7 connected, preferably fixedly connected, to the PCBA board 3 for realizing a key operation controlling the function of the earphone, e.g. a power switch for switching on and off the earphone, a volume control for changing the sound output level of the loudspeaker 2, a answer control for answering an incoming call, a reject control for rejecting an incoming call, a mute control for muting the microphone 6, one or more status indicators for indicating the status of the device, e.g. a power status, a call status and/or a wireless connection status of the earphone.
In order to realize wireless earphone and put into the receiver that charges fast steadily to and the stability that the reinforcing charges, do further improvement, left side earphone and right earphone are all including setting up at the first magnet 8 of shell lower cover 11, left side receiver and right receiver all be provided with the second magnet that first magnet 8 corresponds, first magnet 8 and second magnet polarity are opposite, because the magnetic adsorption effect, in the receiver can be put into to earphone stability fast, not only have the locate function, but also make charge output port and charge input port 5 connect more stably, further improve the stability and the security that charge.
As a preferred mode, the left earphone and the right earphone are designed in a symmetrical structure, and the wireless antenna 4 and/or the PCBA board 3 of the left earphone and the right earphone are designed in a mirror symmetry structure. In specific implementation, the materials, positions, shape specifications and the like of the left earphone wireless antenna 4 are designed and debugged, the right earphone wireless antenna 4 directly adopts the mirror image design of the left earphone wireless antenna 4, wherein the wireless antenna 4 preferably adopts an electroplating antenna or an LDS antenna, and a large amount of antenna design and debugging time can be saved. As shown in fig. 4, the schemes adopted by the PCBA boards 3 of the left earphone and the right earphone are the same, the components are the same, and the wireless antenna 4 and the earphone structure are mirror symmetry designs, so that the left earphone PCBA board 3 can be drawn first, and then the mirror design of the right earphone PCBA board 3 can be directly carried out, thereby saving a great deal of board arrangement and debugging time. The PCBA 3 and the wireless antenna 4 of the left and right earphones are designed in a mirror image structure, so that the design and debugging time is saved, the consistency of the left and right earphones is ensured, the stability and the production efficiency of the product are improved, the research and development production cost is reduced, the research and development production time is shortened, and the wireless earphone has good economic benefits.
In specific implementation, the automatic charging method of the wireless earphone of the embodiment comprises the following steps: when the left earphone is put into the left storage box, the storage detection port detects that the earphone is put (namely, the storage detection port is communicated with the on-off detection port), the detection circuit is triggered to output a charging signal (the charging signal is preferably but not limited to be at a high level) to the second charging management module, the second charging management module is started to output a power supply, and the second charging management module outputs a charging voltage through the charging output port; the charging input port of the left earphone is electrically connected with the charging output port so as to receive charging voltage, and the charging voltage is transmitted to the charging management circuit of the Bluetooth module through the charging protection circuit, so that the battery is charged, and an automatic charging process is completed. The charging process of the right earphone is the same as that of the left earphone, and will not be described in detail here.
The in-ear wireless earphone has the advantages that the left earphone and the right earphone are not required to be connected through wires, so that the true wireless of the earphone is realized; the charging storage box can store the wireless earphone, is convenient to carry and not easy to lose, can also automatically charge the wireless earphone, does not need a USB charging wire during charging, and solves the problems that the whole volume of the existing wireless earphone is large and the existing wireless earphone is inconvenient to carry and easy to lose due to the placement of a micro USB interface; the structural design of left earphone and right earphone is symmetrical structure, and wherein wireless antenna 4 and PCBA board 3 adopt mirror symmetry design, not only can practice thrift a large amount of debugging and design time, guarantees the uniformity of controlling the earphone moreover, has improved stability and production efficiency of product, reduces research and development manufacturing cost and shortens research and development manufacturing time, has better economic benefits.
The method for implementing automatic on/off is described below by taking the left earphone as an example, and the method for implementing the right earphone is identical to the method for implementing the left earphone, and will not be described in detail here.
The auto-off process is described as follows: when the left earphone is placed in the left storage box, the on-off detection port is connected with the storage detection port of the storage box, the on-off detection port is pulled to be at a low level, the optimal time is more than 5s, namely the low level time of the on-off signal detection port of the Bluetooth module is longer than 5s, the on-off action is started, and the automatic off function is realized.
The auto-on process is described as follows: when left earphone receiver is put into to left earphone receiver, the detection port that opens and shuts down is broken away with the accomodate detection port of receiver for under the condition that is connected with the resistance for the detection port level that opens and shuts down is automatic to become high level from low level, then bluetooth module's signal detection port that opens and shuts down is high level, starts the start-up action, realizes automatic start-up function.
The in-ear wireless earphone can also realize the automatic on-off function of the wireless earphone, and when the earphone is put into the charging storage box, the left earphone and the right earphone are automatically turned off; when the earphone is taken out of the charging storage box, the left earphone and the right earphone are automatically started, so that the switching machine of a user is simplified, and the use experience and convenience are further improved.
Example 3
In order to reduce the delay problem of sound propagation of the left and right earphones, the present embodiment is further improved based on the embodiment 1 or 2, as shown in fig. 5b, the bluetooth module of the left earphone is further connected with a left channel audio output circuit for outputting a left channel audio signal and a right channel audio output circuit for outputting a right channel audio signal, where the left channel audio output circuit is connected with the speaker 2 of the left earphone through a digital-to-analog converter and an analog-to-digital converter in sequence, and the right channel audio output circuit is connected with the wireless antenna 4 through the analog-to-digital converter. The improvement point can also be aimed at the Bluetooth module of the right earphone, and can be selected according to actual conditions.
It should be noted that the left channel audio output current, the right channel audio output circuit, the digital-to-analog converter and the analog-to-digital converter may be integrated on the bluetooth module, or may be independent into a single chip, which is not limited thereto.
The common wireless earphone receives an audio signal of an intelligent terminal such as a mobile phone through an earphone, and takes a left ear earphone as an example, as shown in fig. 5a, a left channel audio signal and a right channel audio signal are separated through a bluetooth module, the left channel audio signal is directly output to a speaker 2 of the left ear earphone, the right channel audio signal is output to a wireless transceiver chip for AD conversion, and then the converted digital signal is reflected in a wireless manner, wherein the wireless signal can be a bluetooth signal, a wifi signal or an RF signal, but is not limited to this; the right ear earphone normally comprises a wireless transceiver and a loudspeaker 2, wherein the wireless transceiver processes and separates a received wireless signal, such as an RF signal, into digital audio signals, and then outputs the digital audio signals to the right ear loudspeaker 2 through DA conversion, so that left and right stereo of the wireless earphone is realized. However, since the audio signal of one channel is directly output to the speaker 2, the audio signal of the other channel is subjected to the transmission delay of the wireless signal transmission circuit+the AD conversion delay+the transmission delay of the wireless signal reception circuit+the DA conversion delay, so that the time for the sound of one channel to reach the speaker 2 is shorter than the time for the sound of the other channel to reach the speaker 2, and this time=the transmission delay of the wireless signal transmission circuit+the AD conversion delay+the transmission delay of the wireless signal reception circuit+the DA conversion delay, which is about 100ms to 0.7s in the conventional wireless earphone.
The wireless earphone of the embodiment makes a change in the sound transmission of the left earphone, namely: when the earphone receives an audio signal, a Bluetooth module of the left earphone separates a left channel audio signal and a right channel audio signal, and the left channel audio signal is output to a digital-to-analog converter and an analog-to-digital converter through a left channel audio output circuit and then is transmitted to a left earphone loudspeaker 2; the transmission of the right channel audio signal is unchanged. However, the time difference between the left and right channels is extremely short, generally less than 1ms, and only signals of 0 to 20Khz can be received due to dullness of the hearing of the human ear. Therefore, the wireless earphone of the embodiment basically cannot feel the delay phenomenon of the sound of the left earphone and the right earphone, so that the true wireless earphone in the true sense is realized, and the sound quality effect is also improved.
The above examples only show embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the invention, but all technical solutions obtained by equivalent substitution or equivalent transformation shall fall within the scope of the invention.
Claims (5)
1. The automatic charging and switching circuit comprises an electronic terminal and a charging terminal, and is characterized in that the electronic terminal comprises a PCBA board, a first charging management module, a battery, a switching on/off detection port and a charging input port, wherein the switching on/off detection port is connected with a switching on/off signal detection port of the PCBA board through a matching circuit, and the charging input port is connected with the battery through the first charging management module; the charging terminal comprises a storage detection port, a detection circuit, a second charging management module and a charging output port which are sequentially connected; when the electronic terminal is arranged in the charging terminal, the on-off detection port is correspondingly communicated with the storage detection port, and the charging input port is correspondingly communicated with the charging output port;
the electronic terminal is arranged on the charging terminal, and a charging input port and an on-off detection port of the electronic terminal are respectively communicated with a charging output port and a storage detection port of the charging terminal;
The storage detection port triggers the detection circuit to output a charging signal to the second charging management module, the second charging management module outputs voltage through the charging output port, and the charging input port receives the voltage and transmits the voltage to the battery of the electronic terminal to realize charging action;
the on-off detection port after being conducted outputs a shutdown signal to a PCBA board of the electronic terminal to perform shutdown action; when the electronic terminal moves out of the charging terminal, the on-off detection port is disconnected with the storage detection port, the on-off detection port outputs a starting signal to a PCBA board of the electronic terminal to perform starting action, the matching circuit comprises a bias resistor R1 and a triode Q1, and the detection circuit is a resistor R2;
the second charging management module is connected with the charging output port through an output voltage switching circuit, and the output voltage switching circuit comprises a resistor R4 and a triode Q2.
2. The automatic charging and switching circuit of claim 1, wherein a charge protection circuit is further coupled between the charge input port and the first charge management module.
3. The automatic charging and switching circuit of claim 1, wherein the first charge management module is integrated on the PCBA board.
4. The automatic charging and switching circuit as claimed in claim 1, wherein the charging terminal further comprises a power input port and/or an energy storage module, both of which are connected to the second charging management module.
5. The automatic charging and switching circuit of claim 1, wherein the electronic terminal is an earphone, an intercom, a microphone, a cell phone, or a tablet computer.
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| CN201610705224.1A CN107770662B (en) | 2016-08-23 | 2016-08-23 | Automatic charging and switching circuit |
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| CN201610705224.1A CN107770662B (en) | 2016-08-23 | 2016-08-23 | Automatic charging and switching circuit |
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|---|---|---|---|---|
| CN108289268A (en) * | 2018-04-19 | 2018-07-17 | 科大讯飞股份有限公司 | A kind of microphone transmitters and radio system |
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