CN208461500U - Earphone charging system and charging box therein, earphone - Google Patents
Earphone charging system and charging box therein, earphone Download PDFInfo
- Publication number
- CN208461500U CN208461500U CN201820978113.2U CN201820978113U CN208461500U CN 208461500 U CN208461500 U CN 208461500U CN 201820978113 U CN201820978113 U CN 201820978113U CN 208461500 U CN208461500 U CN 208461500U
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- earphone
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- charging box
- common wire
- charging
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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
Abstract
The utility model relates to a kind of earphone charging system and charging box therein, earphone, charging box charge management circuit is powered to COM common wire, and the normal pins of charging box MCU are connect with COM common wire, and the GND foot of charging box MCU is connect with GND line；Earphone charge management circuit takes electricity from COM' common wire, the normal pins of earphone MCU are connect with COM' common wire, the GND foot of earphone MCU is connect with GND' line, the input terminal of earphone charge management circuit is also connected on COM' common wire through capacitor C2, when earphone is inserted into charging box, power supply terminal docking on electrified terminal and charging box on earphone, makes COM common wire that COM' common wire be connected, and GND' line is connected in GND line；Normal power supply and data interaction are carried out by COM common wire and COM' common wire between charging box and earphone, when COM' common wire is pulled low, capacitor C2, which slowly discharges, gives earphone charge management circuit, for the of short duration charging of earphone charge management circuit, guarantee that power supply is uninterrupted when charging box and earphone carry out data interaction.
Description
Technical field
The utility model relates to earphone charging field more particularly to earphone charging systems and charging box therein, earphone.
Background technique
TWS earphone namely true wireless headset refer between two earphones and between earphone and mobile device, Quan Shitong
The mode being wirelessly connected is crossed, without any wire communication.TWS earphone is the mainstream development trend of the following earphone, at present includes China
For giants such as, the Hamann world, apples, in the numerous and confused R & D design that TWS earphone is added.
The trend of TWS earphone is that size, structure, appearance are as succinct small and exquisite as possible, and cost also requires more lower better.Traditional
TWS earphone, when charging, the connection terminal between two earphones of charging box and left and right, Pin point there are two general,
That is (connection terminal being wherein located on charging box is known as power supply terminal to VCC/GND, and the connection terminal on earphone is known as by electricity
Terminal).This kind design has no idea to carry out communication interaction, and charging box has no idea to know the electricity hundred of current each earphone
Point than be it is how many, also just have no idea to carry out electricity to show, so that UI interaction is less friendly.In the prior art in order to charge
The communication of box and earphone generally requires to increase additional Pin point, such as 4 Pin points, other than the both threads of power supply, additionally
It adds both threads and carries out communication scheme, but this structure designs, and influences very much the aesthetics of structure, and material cost can also mention
It is high.
Utility model content
The purpose of this utility model is that realizing the normal power supply between charging box and earphone by two connection terminals
And data interaction, and charging box and earphone power uninterruptedly when data interaction.
For this purpose, providing a kind of earphone charging system, there are charging box and earphone in earphone charging system.
It is set in the shell of the charging box charging box there are two power supply terminal, keeps charge control module in shell, this is filled
Electric control module includes charging box charge management circuit, charging box MCU, and charge control module further includes supplying respectively with two of them
The COM common wire and GND line of electric terminal connection, charging box charge management circuit take electricity from the power supply of charging box, and public to COM
Conllinear power supply, the normal pins of charging box MCU are connect with COM common wire, and the GND foot of charging box MCU is connect with GND line.
Further, cathode is serially connected in charging box charge management circuit and the connection line of COM common wire connect COM
The diode D1 of common wire.
Charging box is stored with the computer storage medium for looking into electricity, and the program in the computer storage medium is electrically charged box
MCU is performed the steps of when executing
COM common wire is pulled to low level by the starting step executed at first；
Downlink transfer determines that COM common wire is pulled to high level by step；
The query object executed after downlink transfer determines step determines that step is controlled according to preset DDT data definition table
The level change situation of COM common wire；
Data downstream step its during execution, charging box MCU does not control COM common wire；
COM common wire is retracted into high level in the end step finally executed.
Further, query object determines that step is specially only that the drawing of COM common wire is high/low.
The earphone is TWS earphone, is set in the shell of earphone there are two electrified terminal, and storage control mould is kept in shell
Block, the storage control module include earphone charge management circuit, earphone MCU, and storage control module further includes respectively with wherein two
The COM' common wire and GND' line of a power supply terminal connection, earphone charge management circuit takes electricity from COM' common wire, and gives earphone
In power supply power supply, the normal pins of earphone MCU connect with COM' common wire, and the GND foot of earphone MCU is connect with GND' line, ear
The input terminal of machine charge management circuit is also connected on COM' common wire through capacitor C2.
Further, it is serially connected in the connection line between the input terminal of earphone charge management circuit and COM' common wire
The anode of diode D2, diode D2 connect COM' common wire, and the cathode of diode D2 connects capacitor C2.
TWS earphone is stored with the computer storage medium for uploading electricity, the program quilt in the computer storage medium
Earphone MCU is performed the steps of when executing
COM' common wire is pulled to low level by the starting step executed at first；
Uplink determines that COM' common wire is pulled to low level by step；
The earphone identity executed after uplink determines step shows that step is controlled according to preset DDT data definition table
The level change situation of COM' common wire；
Data upload step is by the number set, by COM' common wire continuous transformation, to upload the charged state of earphone
And/or electricity percentage；
COM' common wire is retracted into high level in the end step finally executed.
Further, identity shows only to draw COM' common wire in step high/low.
Further, charging box MCU and/or earphone MCU execute each step duration it is identical.
The utility model has the advantages that
The charging box charge management circuit of the utility model give COM common wire power supply, the normal pins of charging box MCU with
The connection of COM common wire, the GND foot of charging box MCU are connect with GND line；
Earphone charge management circuit takes electricity from COM' common wire, and the normal pins of earphone MCU are connect with COM' common wire, ear
The GND foot of machine MCU is connect with GND' line, and the input terminal of earphone charge management circuit is also connected to COM' common wire through capacitor C2
On, when earphone is inserted into charging box, the power supply terminal on electrified terminal and charging box on earphone is docked, and leads COM common wire
GND' line is connected in logical COM' common wire, GND line；
Normal power supply and data interaction are carried out by COM common wire and COM' common wire between charging box and earphone, when
When COM' common wire is pulled low, capacitor C2, which slowly discharges, gives earphone charge management circuit, fills for earphone charge management circuit is of short duration
Electricity guarantees that power supply is uninterrupted when charging box and earphone carry out data interaction.
Detailed description of the invention
Using attached drawing, the utility model is described in further detail, but the embodiment in attached drawing is not constituted to the utility model
Any restrictions for those of ordinary skill in the art without creative efforts, can also be according to following attached
Figure obtains other attached drawings.
Fig. 1 is the circuit connection diagram that left earphone and right earphone are inserted into respectively after charging box.
Fig. 2 is the waveform diagram of the COM common wire when electricity request is looked into charging box earphone transmission to the left.
Fig. 3 is the waveform diagram of the COM' common wire when left ear uploads electricity.
Specific embodiment
See that Fig. 1, Fig. 1 are the circuit connection diagram that left/right earphone is inserted into after charging box, left side is filling for charging box in figure
Electric control module, left earphone and right earphone are TWS earphone.
In charge control module, charging box charge management circuit is the prior art, and electricity is taken from charging box battery, and
It is delivered to after the power of electric current is converted in COM common wire.In order to guarantee one-way conduction charging and decompression protection, charging
A diode D1 is concatenated in box charge management circuit and the connection line of COM common wire, wherein the cathode of diode connects COM
Common wire.
It is equipped with a charging box MCU in charge control module, is the originating end for carrying out charge control and communication control.It fills
Electric box MCU takes electricity via charging box voltage conversion circuit from charging box battery, and wherein charging box voltage conversion circuit is specially
LDO circuit/DC-DC conversion circuit is used to carry out voltage conversion, thus required when to charging box MCU offer normal work
Voltage.
After energization, charging box MCU is connect with a normal pins with COM common wire, controlled by the normal pins/
Incude the level of COM common wire.Charging box MCU is connect with its GND foot with GND line, so that it is guaranteed that ground voltage reference.Charging
Box MCU also carries out I2C/SPI/UART communication with charging box charge management circuit, thus to the function of charging box charge management circuit
Rate conversion process is controlled.
See Fig. 1, the outer side of shell of charging box is exposed, and there are four power supply terminal A1, A2, B1, B2, and power supply terminal A1, B1 are common
The COM common wire of charge control module is connected, power supply terminal A2, B2 connect the GND line of charge control module jointly.Left earphone
Shell on there are two electrified terminal A1', A2', when charging on left earphone insertion charging box, electrified terminal A1', A2' are right respectively
Meet power supply terminal A1, A2.Also there are electrified terminal B1', B2' on the shell of right earphone, when charging on right earphone insertion charging box, by
Electric terminal B1', B2' dock power supply terminal B1, B2 respectively.
When charging on left earphone and right earphone insertion charging box, left earphone and right earphone electrically connect with charging box foundation respectively
Relationship is connect, circuit connection diagram is as shown in Figure 1.In Fig. 1, right side is respectively the storage control mould of left earphone and right earphone
Block, wherein the storage control module of left earphone and right earphone is all the same on circuit composition and connection type, to simplify explanation, under
Text is only described the circuit composition and connection type of the storage control module of left earphone, and right earphone is similar.
In the storage control module of left earphone, left earphone MCU is via left earphone voltage conversion circuit from left headset batteries
Place takes electricity, wherein left earphone voltage conversion circuit is LDO circuit/DC-DC conversion circuit.The electrified terminal A1' of left earphone is passed through
It is connected to the normal pins of left earphone MCU by COM' common wire, the electrified terminal A2' of left earphone is connected to via GND' line
The GND foot of left earphone MCU, after left earphone is inserted into charging box, COM common wire is connected to COM' common wire, GND line and GND' line
Connection.Left earphone charge management circuit is additionally provided in storage control module, the input terminal of the left earphone charge management circuit from
Electricity is taken on COM' common wire, and is charged to left headset batteries.
The input terminal of left earphone charge management circuit is also connected on COM' common wire through capacitor C2, and COM' common wire is height
It charges when level to capacitor C2.When the level of COM' common wire is pulled low, capacitor C2 slowly discharges to left earphone Charge Management
Circuit is the left of short duration charging of earphone charge management circuit.In addition, when the level of COM' common wire by it is low suddenly be raised when, electricity
Appearance C2 can reduce the voltage jump fluctuation of COM' common wire, avoid the generation of tip burr.Once the level of COM' common wire returns
Height, then capacitor C2 recovery are electrically charged.Connection line between the input terminal and COM' common wire of left earphone charge management circuit
The anode of upper concatenation one diode D2, diode D2 connect COM' common wire, and the cathode of diode D2 connects capacitor C2, benefit
Flow backward back COM' common wire with diode D2 come the discharge current of blocking capacitor C2, guarantees that capacitor C2 will not immediately terminate in electric discharge.
Left earphone charge management circuit is communicated via I2C/SPI/UART with left earphone MCU, to receive left earphone
The control instruction of MCU.
When left earphone and right earphone insertion charging box, the process of charging is as follows:
Under normality, charging box charge management circuit is powered to COM common wire, keeps COM common wire and COM' common wire high
Level, capacitor C2, capacitor C2' are electrically charged.
If charging box is wanted to know the electricity of left earphone, see that Fig. 2, execution the following steps look into electricity with the transmission of earphone to the left and ask
It asks:
S11: firstly, the level of COM common wire is dragged down 1ms by charging box MCU, all headset detections to low level are jumped at this time
After change, it is known that enabling signal occurs, and begins to receive data；
S12: then, COM common wire is continued 1ms by charging box MCU, indicates that charging box prepares inquiry earpiece data, data
Transmission direction is downlink；
S13: then, COM common wire is continued 1ms by charging box MCU again, and indicate charging box preparation inquiry is left earphone
Data, then left earphone continues to data, and right earphone stops reception data, and (right earphone can not also stop receiving data, need to only connect
It is ignored after harvesting data, only slightly power consumption)；
The level of COM common wire is continuously drawn high/is dragged down 6 times by S14: charging box MCU, each duration 1ms, thus real
The downlink of existing 6bit data, wherein this 6bit data has no certain sense, therefore preferably, in S14, charging box MCU is not to COM
Common wire carries out control to power saving, and making this 6bit data is 1 or 0；
After S15:6bit data distribute, COM common wire is retracted high level by charging box MCU, indicates to terminate communication.
Left earphone receive charging box look into electricity request after, see Fig. 3, execute the following steps to complete for uploading answering for electricity
It answers:
S21: firstly, the level of COM' common wire is dragged down 1ms by left earphone MCU, charging box and right earphone are detected at this time
After low level jump, it is known that enabling signal occurs, and begins to receive data；
S22: then, COM' common wire is continued 1ms by left earphone MCU, and expression data transfer direction is uplink, then charging box
Data are continued to, right earphone stops receiving data；
S23: then, COM' common wire is continued 1ms again by left earphone MCU again, and charging box is made to know the left earphone of the data
It is transmitted；
S24: left earphone MCU continuously by COM common wire ' level draw high/drag down 6 times, each duration 1ms, indicate
6bit data, wherein this 6bit data characterization charged state and electricity percentage；
After S25:6bit data distribute, the level of COM' common wire is retracted high level by left earphone MCU, indicates to terminate logical
Letter.
In these steps of S11~S15, S21~S25, when the level on COM common wire/COM' common wire is low level
When, capacitor C2 will give the of short duration charging of earphone charge management circuit automatically.
If charging box is wanted to know the electricity of right earphone, executed referring to step S1, but need to be public by the COM in step S13
Line becomes low level by high level, makes left earphone stop receiving data, right earphone continues to data.
If right earphone wants response, referring to step S2, but the COM' common wire in step S23 need to be become by low level
High level knows that charging box transmitted by the data right earphone.
It should be noted that response needs are completed in 10ms, otherwise charging box thinks data transmission fails, and then again
Send data/attonity.If response is completed in 10ms, charging box restarts the new frame data of starting.
As seen from the above, in the present embodiment, the length of the frame data on COM common wire/COM' common wire rises for 1bit
Beginning position+8bit data bit, it is biphone charging that this structure, which is suitable for charging box simultaneously,.For convenience of understanding, 8bit data bit is provided
DDT data definition table it is human-readable, be detailed in the following table 1, wherein B0 can be summarized as direction position, and B1 represents address bit.
Table 1
If charging box is thought to charge simultaneously for more earphones, the settable greater number of power supply terminal of charging box, and increases
Add the length of the frame data on COM common wire/COM' common wire, extends very convenient.If charging box thinks simultaneously to be three
Earphone charging, then become 1bit start bit+9bit data for the length of the frame data on COM common wire/COM' common wire
Position, wherein the DDT data definition table of 9bit data bit is as shown in table 2 below.
Table 2
It should be noted that 1ms above is the duration, the duration can be adjusted as needed.It is logical
Cross control each level duration it is identical, if the duration of some level on COM common wire/COM' common wire and its
His level is different, is not 1ms, then it is believed that the frame data malfunction.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (10)
1. charging box is used for external power supply terminal equipped with charge control module and two, charge control module includes charging box
Charge management circuit, charging box MCU,
It is characterized in that:
Charge control module further includes the COM common wire and GND line connecting respectively with above-mentioned two power supply terminal, charging box charging
Management circuit takes electricity from the power supply of charging box, and powers to COM common wire, the normal pins and COM common wire of charging box MCU
Connection, the GND foot of charging box MCU are connect with GND line.
2. charging box according to claim 1, it is characterized in that: the connection of charging box charge management circuit and COM common wire
The diode D1 of cathode connection COM common wire is serially connected on route.
3. charging box according to claim 1, it is characterized in that: charge control module further includes charging box voltage conversion electricity
Road, charging box MCU take electricity from the power supply of charging box via charging box voltage conversion circuit.
4. charging box according to claim 3, it is characterized in that: the charging box voltage conversion circuit is LDO circuit or DC-
DC conversion circuit.
5. earphone is used for external electrified terminal equipped with storage control module and two, storage control module includes earphone charging
Circuit, earphone MCU are managed,
It is characterized in that:
Storage control module further includes the COM' common wire and GND' line connecting respectively with above-mentioned two electrified terminal, earphone charging
The input terminal for managing circuit takes electricity from COM' common wire, and to the power supply power supply in earphone, the normal pins and COM' of earphone MCU
Common wire connection, the GND foot of earphone MCU are connect with GND' line, and the input terminal of earphone charge management circuit is also connected through capacitor C2
To COM' common wire.
6. earphone according to claim 5, it is characterized in that: in the input terminal and COM' common wire of earphone charge management circuit
Between connection line on be serially connected with diode D2, the anode of diode D2 connects COM' common wire, and the cathode of diode D2 connects
Meet capacitor C2.
7. earphone according to claim 6, it is characterized in that: the earphone is TWS earphone.
8. earphone according to claim 5, it is characterized in that: storage control module further includes earphone voltage conversion circuit, ear
Machine MCU takes electricity from the power supply of earphone via earphone voltage conversion circuit.
9. earphone according to claim 8, it is characterized in that: the earphone voltage conversion circuit is that LDO circuit or DC-DC turn
Change circuit.
10. earphone charging system, it is characterized in that including the described in any item charging boxes of Claims 1 to 4 and claim 5~9
Described in any item earphones, when earphone is inserted into charging box, electrified terminal and power supply terminal docking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820978113.2U CN208461500U (en) | 2018-06-22 | 2018-06-22 | Earphone charging system and charging box therein, earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820978113.2U CN208461500U (en) | 2018-06-22 | 2018-06-22 | Earphone charging system and charging box therein, earphone |
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| Publication Number | Publication Date |
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| CN208461500U true CN208461500U (en) | 2019-02-01 |
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ID=65169052
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| CN201820978113.2U Active CN208461500U (en) | 2018-06-22 | 2018-06-22 | Earphone charging system and charging box therein, earphone |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147971A (en) * | 2019-12-19 | 2020-05-12 | 佳禾智能科技股份有限公司 | TWS earphone and charging box two-way communication method |
| CN111697713A (en) * | 2019-03-16 | 2020-09-22 | 炬芯（珠海）科技有限公司 | Wireless earphone charging control method, wireless earphone and charging box |
| WO2020192377A1 (en) * | 2019-03-27 | 2020-10-01 | 上海爻火微电子有限公司 | Earphone charging circuit, and earphone charging case |
-
2018
- 2018-06-22 CN CN201820978113.2U patent/CN208461500U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697713A (en) * | 2019-03-16 | 2020-09-22 | 炬芯（珠海）科技有限公司 | Wireless earphone charging control method, wireless earphone and charging box |
| CN111697713B (en) * | 2019-03-16 | 2022-04-29 | 炬芯科技股份有限公司 | Wireless earphone charging control method, wireless earphone and charging box |
| WO2020192377A1 (en) * | 2019-03-27 | 2020-10-01 | 上海爻火微电子有限公司 | Earphone charging circuit, and earphone charging case |
| CN111147971A (en) * | 2019-12-19 | 2020-05-12 | 佳禾智能科技股份有限公司 | TWS earphone and charging box two-way communication method |
| CN111147971B (en) * | 2019-12-19 | 2021-12-07 | 佳禾智能科技股份有限公司 | TWS earphone and charging box two-way communication method |
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