CN109496389A - Circuit and electronic equipment - Google Patents
Circuit and electronic equipment Download PDFInfo
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- CN109496389A CN109496389A CN201880001712.1A CN201880001712A CN109496389A CN 109496389 A CN109496389 A CN 109496389A CN 201880001712 A CN201880001712 A CN 201880001712A CN 109496389 A CN109496389 A CN 109496389A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention relates to field of electronic devices, a kind of circuit and electronic equipment are disclosed.Wherein, circuit includes battery and the isolation circuit for making the cathode of the battery with being systematically isolated；The isolation circuit includes first end, second end, third end and the 4th end；The first end is electrically connected to the anode of the battery, and for the second end for being electrically connected predeterminated voltage, the third end is electrically connected to the cathode of the battery, the 4th end be electrically connected to it is described systematically.Compared with prior art, the application is made the cathode of battery and is systematically isolated due to isolation circuit, so battery will not generate screen effect to the radiation of antenna, can be made the occupied small volume of circuit, be reduced the volume of electronic equipment.
Description
Technical field
The invention relates to field of electronic devices, in particular to circuit and electronic equipment.
Background technique
In recent years, with the continuous development of the communication technology and science and technology be constantly progressive, the electronics such as earphone, wrist-watch, bracelet
Equipment has become essential using tool in people's daily life.Bluetooth headset, bluetooth especially with Bluetooth antenna
The electronic equipments such as wrist-watch, bluetooth bracelet, bring great convenience to people's lives.Current such as bluetooth headset, bluetooth hand
The electronic equipments volumes such as table, bluetooth bracelet small and easy to use radio connection and other equipment are communicated, it is answered
With more and more extensive.The size of electronic equipment increasingly minimizes at present, is illustrated so that electronic equipment is bluetooth headset as an example:
To improve cruising ability, the size of battery cannot reduce, and space proportion shared by battery is caused just to will increase.
But at least there are the following problems in the prior art: the electricity that functional diversities make electronic equipment need volume bigger
Pond supports, and can occupy biggish space, the volume of electronic equipment is caused to become larger.And because the outer surface of battery is metal material
Matter, therefore screen effect can be generated to the radiation of antenna.
Summary of the invention
The application embodiment is designed to provide a kind of circuit and electronic equipment, since isolation circuit makes the negative of battery
Pole be systematically isolated, so battery will not to the radiation of antenna generate screen effect, the distance between battery and antenna can
To be arranged close, make the occupied small volume of circuit, to reduce the volume of electronic equipment.
In order to solve the above technical problems, presently filed embodiment provides a kind of circuit, including battery and for making
The cathode of the battery and the isolation circuit being systematically isolated；The isolation circuit include first end, second end, third end with
And the 4th end；The first end is electrically connected to the anode of the battery, and the second end is for being electrically connected predeterminated voltage, and described the
Three ends are electrically connected to the cathode of the battery, the 4th end be electrically connected to it is described systematically.
Presently filed embodiment additionally provides a kind of electronic equipment, including foregoing circuit.
In terms of existing technologies, circuit includes battery and the cathode for making the battery to the application embodiment
With the isolation circuit being systematically isolated, the isolation circuit includes first end, second end, third end and the 4th end, described
First end is electrically connected to the anode of the battery, and for being electrically connected predeterminated voltage, the third end is electrically connected to the second end
The cathode of the battery, the 4th end be electrically connected to it is described systematically.That is, since isolation circuit makes the cathode of battery
Be systematically isolated, so battery will not to the radiation of antenna generate screen effect, battery and antenna can be arranged very
Closely, reduce the occupied volume of circuit, to reduce the volume of electronic equipment.
In addition, the isolation circuit can be designed as according to actual design demand to improve the versatility of the application
Lumped circuit or microstrip filter circuit.
In addition, the battery is as first antenna, the cathode of the battery is as antenna feed point；Wherein, the battery
Outer surface is metal material.Since the outer surface of battery is metal material, it is possible to directly draw antenna in the cathode of battery
Antenna feed point is connected to communication chip by feed point, so that battery realizes antenna function, it is occupied to save antenna in the prior art
Space.
In addition, the isolation circuit is microstrip filter circuit, comprising: the first microstrip line, the second microstrip line and the first electricity
Hold；Wherein one end of first microstrip line forms the anode that the first end is electrically connected to the battery, and the other end forms institute
It states second end and is electrically connected to predeterminated voltage；Wherein one end of second microstrip line forms the third end and is electrically connected to the electricity
The cathode in pond, the other end formed the 4th end be electrically connected to it is described systematically；Wherein one end of the first capacitor is electrically connected
In the second end, the other end is electrically connected to the 4th end.By the way that this design provides a kind of specific realities of isolation circuit
Existing form facilitates the feasibility for promoting the application.
In addition, the isolation circuit is lumped circuit, comprising: the first separation inductance, the second separation inductance and second
Capacitor；Wherein one end of the first separation inductance forms the anode that the first end is electrically connected to the battery, other end shape
Predeterminated voltage is electrically connected at the second end；Wherein one end of the second separation inductance forms the third end and is electrically connected to
The cathode of the battery, the other end formed the 4th end be electrically connected to it is described systematically；Wherein one end of second capacitor
It is electrically connected to the second end, the other end is electrically connected to the 4th end.By the way that this design provides a kind of isolation circuits
Specific implementation form facilitates the feasibility for promoting the application.
In addition, the isolation circuit is lumped circuit, including common mode choke；The common mode choke includes first
Common mode inductance and the second common mode inductance；A wherein termination battery cathode for first common mode inductance, the other end is connected to the system ground；Institute
State a wherein termination anode for the second common mode inductance, another termination predeterminated voltage.By this design provides one kind every
Specific implementation form from circuit facilitates the feasibility for promoting the application.
In addition, the circuit further includes antenna；The antenna is less than pre-determined distance at a distance from the battery.Due to isolation
Circuit makes the cathode of battery and is systematically isolated, so battery will not be to antenna even if antenna is close at a distance from battery
Radiation generate screen effect, facilitate reduce the occupied space of circuit.
In addition, the length of the antenna is a quarter of the antenna operating wavelength.It is day by the Design of length of antenna
The a quarter of line operation wavelength can make antenna have better radianting capacity.
In addition, the circuit further includes high-pass filtering circuit and communication chip；The high-pass filtering circuit is connected electrically in institute
It states between antenna and the communication chip.By this circuit design, low frequency signal can be filtered out, be avoided due to low frequency
The radio circuit impedance generated in signal impacts the performance of antenna.
In addition, the high-pass filtering circuit includes third capacitor, the 4th capacitor and inductance；The third capacitor and described
Four capacitors are connected between the antenna and the communication chip, wherein one end of the inductance be connected to the third capacitor and
Between 4th capacitor, described in another termination of the inductance systematically.By this circuit design, a kind of high pass is provided
The physical circuit form of filter circuit, and high-pass filtering circuit can be designed to lumped circuit in actual design
High-pass filtering circuit can also be designed to microstrip filter circuit.
In addition, the electronic equipment is earphone, wrist-watch or bracelet, allow to improve the versatility of the application.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment.
Fig. 1 is the structural block diagram according to the application first embodiment circuit；
Fig. 2 be according to the application first embodiment isolation circuit be lumped circuit when circuit structural schematic diagram；
Fig. 3 be according to the application first embodiment isolation circuit be lumped circuit when circuit another structural representation
Figure；
Fig. 4 is a kind of aspect graph that earphone is applied to according to the application second embodiment circuit；
Fig. 5 is the structural schematic diagram according to the application third embodiment circuit；
Fig. 6 is the outline structural diagram according to the application third embodiment antenna.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with attached drawing to the application
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the application
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
The first embodiment of the application is related to a kind of circuit.As shown in Figure 1, circuit includes battery 11 and for making
State the cathode and the isolation circuit being systematically isolated 12 of battery 11.The isolation circuit 12 includes first end, second end, third
End and the 4th end.The first end be electrically connected to the anode of the battery 11+, the second end is for being electrically connected predeterminated voltage
VBAT, the third end is electrically connected to the cathode-of the battery 11, and the 4th end is electrically connected to the systematically GND.Also
It is to say, isolates the cathode-of battery 11 with systematically GND by isolation circuit 12, since isolation circuit 12 makes battery 11
Cathode-is isolated with systematically GND, so battery 11 will not generate screen effect to the radiation of antenna, so as to by battery
11 and antenna setting it is close, can reduce the occupied volume of circuit, so as to reduce the volume of electronic equipment.
In addition, the isolation circuit 12 can be designed according to actual design demand to improve the versatility of the application
For lumped circuit or microstrip filter circuit.
As shown in Fig. 2, the isolation circuit 12 can be lumped circuit in present embodiment, comprising: the first separation
Inductance LP, second separation inductance LNWith the second capacitor C.The first separation inductance LPWherein one end form first end electricity
Be connected to the anode of the battery 11+, the other end forms the second end for being electrically connected predeterminated voltage VBAT.Described second point
From inductance LNWherein one end form the cathode-that the third end is electrically connected to the battery 11, the other end forms the described 4th
End is electrically connected to the systematically GND.Wherein one end of the second capacitor C is electrically connected to the second end, and the other end is electrically connected
It is connected to the 4th end.The first separation inductance L in present embodimentP, second separation inductance LNAnd second capacitor C composition two
Rank butterworth filter circuit, can filter out radiofrequency signal, make direct current and low frequency signal normal through.It is mentioned by this design
The specific implementation form for having supplied a kind of isolation circuit 12 facilitates the feasibility for promoting the application.
As shown in figure 3, the isolation circuit 12 can also be lumped circuit, including common mode choke 121.It is described total
Mould choke coil 121 includes the first common mode inductance and the second common mode inductance.A wherein termination battery 11 for first common mode inductance
Cathode-, the other end is connected to the system ground GND.A wherein termination anode for second common mode inductance+, another default electricity of termination
Press VBAT。
As shown in figure 5, the isolation circuit 12 can also be microstrip filter circuit, comprising: the first microstrip line, second micro-
Band line and first capacitor C.Wherein one end of first microstrip line forms the anode that the first end is electrically connected to the battery
+, the other end forms the second end and is electrically connected to predeterminated voltage VBAT.Wherein one end of second microstrip line forms described
Three ends are electrically connected to the cathode of the battery, and the other end forms the 4th end and is electrically connected to the systematically GND.Described first
Wherein one end of capacitor C is electrically connected to the second end, and the other end is electrically connected to the 4th end.First microstrip line and institute
Stating the second microstrip line is serpentine configuration, and length is identical.By first microstrip line and second microstrip design at snakelike
Structure can reduce first microstrip line and the occupied space of the second microstrip line.
As shown in figure 5, circuit further includes antenna 31；The antenna 31 is less than pre-determined distance at a distance from the battery 11.
Since isolation circuit 12 makes the cathode of battery 11 and is systematically isolated, so even if antenna 31 is close at a distance from battery 11,
Battery 11 will not generate screen effect to the radiation of antenna 31, help to reduce the occupied space of circuit.
The length of the antenna 31 is a quarter of signal wavelength in its working frequency range, and such design can make antenna
31 have better radianting capacity.The antenna 31 of present embodiment can be designed as serpentine configuration.It is noted that such as Fig. 6
Shown, antenna 31 is not limited to serpentine configuration, as long as can guarantee that the length of antenna 31 is signal wavelength in its working frequency range
The arbitrary shape of a quarter is all within the scope of protection of this application.It is illustrated so that antenna 31 is Bluetooth antenna as an example, it is blue
Tooth antenna is 2.4GHz in working frequency range, is the quarter-wave of signal wavelength in the frequency range by the Design of length of antenna 31,
It can make Bluetooth antenna that there is good radianting capacity in 2.4GHz frequency range.But the antenna 31 of the application is not limited to bluetooth day
Line, such as can by the Zigbee antenna that is designed as of antenna 31, (Zigbee is to be based on according to actual design requirement
The low-power consumption LAN protocol of IEEE802.15.4 standard) or WiFi antenna (WiFi is that a kind of permission electronic equipment is connected to one
The technology of a WLAN) etc., it no longer illustrates herein.
When isolation circuit 12 is formed using microstrip filter, the equivalent input impedance of isolation circuit 12 is Zin。
Wherein Z0、ZLThe impedance of respectively the first microstrip line and second microstrip line.Micro-strip
Signal wavelength in lineWhen the length d of antenna is designed as d=λ/4, tan (β d)=∞.Equivalent inpnt hinders at this time
Anti- abbreviation are as follows:Since first capacitor C is very big, Z is equivalent in radio circuit impedanceL=0, such Zin=∞,
Therefore it can be isolated by foregoing circuit design by 11 cathode of battery and systematically.Compared with prior art, present embodiment by
Make the cathode of battery 11 in isolation circuit 12 and be systematically isolated, so battery 11 will not generate shielding effect to the radiation of antenna
It answers, the occupied small volume of circuit can be made, so as to reduce the volume of electronic equipment.
The second embodiment of the application is related to a kind of circuit.The difference of present embodiment and first embodiment exists
In: by battery as antenna in present embodiment.
As shown in connection with fig. 1, circuit includes battery 11, for the cathode of the battery 11 to be isolated with what is be systematically isolated
Circuit 12.The isolation circuit 12 includes first end, second end, third end and the 4th end.The first end is electrically connected to institute
State the anode of battery 11+, the second end is for being electrically connected predeterminated voltage VBAT, the third end is electrically connected to the battery 11
Cathode-, the 4th end is electrically connected to the systematically GND.The battery 11 is used as first antenna, and the cathode of battery 11 is made
For antenna feed point；Wherein, the outer surface of the battery 11 is metal material.Since the outer surface of battery 11 is metal material, institute
Directly antenna feed point can be drawn in the cathode of battery 11, so that battery 11 realizes antenna function, day in the prior art is saved
The occupied space of line.That is, isolate the cathode-of battery 11 with systematically GND by isolation circuit 12, due to every
It isolates the cathode-of battery 11 with systematically GND from circuit 12, so battery 11 will not generate signal radiation as antenna
Screen effect, so as to so that the occupied small volume of circuit, reduces the volume of electronic equipment.
As shown in figure 4, battery 11 may include casing part 111 and the flexible circuit board part 112 of battery.In Fig. 4
VBATEnd electrical connection predeterminated voltage VBAT, GND expression ground connection.Mark 41 in Fig. 4 indicates pad, can be by pad by this reality
The circuit for applying mode is welded in earphone.
In addition, the first end in present embodiment is connected electrically in the anode of the battery 11 by welding,
The third end fits in the cathode of the battery 11 by way of fitting.Specifically, since the outer surface of battery 11 is
Metal material, therefore the third end can realize the negative electricity with battery 11 by being directly attached to the outer surface of battery 11
Connection.In actual application, the flexible circuit board part 112 of battery 11 can roll up the appearance in the casing part 111 of battery
Face.
It is noted that the isolation circuit 12 in present embodiment can be microstrip filter circuit, comprising: the
One microstrip line, the second microstrip line.Wherein one end of first microstrip line forms the first end and is electrically connected to the battery
Anode+, the other end forms the second end and is electrically connected to predeterminated voltage VBAT.Wherein one end of second microstrip line forms institute
The cathode-that third end is electrically connected to the battery is stated, the other end forms the 4th end and is electrically connected to the systematically GND.Its
In, first microstrip line and second microstrip line are serpentine configuration, and length is identical.
It is noted that the length phase of the length of the battery 11 and first microstrip line and second microstrip line
It together, and is a quarter of transmitted signal wavelengths in first microstrip line and second microstrip line.The battery is as day
The working frequency range of line is 2.4GHz.The shape of the battery 11 can be, but not limited to as cylindrical body, can be according to actual design
Battery 11 is designed as arbitrary shape by demand.
Compared with prior art, present embodiment due to battery 11 outer surface be metal material, it is possible to directly exist
The cathode of battery 11 draws antenna feed point, so that battery 11 realizes antenna function, saves the occupied sky of antenna in the prior art
Between.
The third embodiment of the application is related to a kind of circuit.Present embodiment and first embodiment and the second embodiment party
Formula is different, is in place of the main distinction: third embodiment further includes the high-pass filtering circuit being electrically connected with antenna and communication core
Piece.
As shown in connection with fig. 1, circuit includes battery 11, for the cathode of the battery 11 to be isolated with what is be systematically isolated
Circuit 12.The isolation circuit 12 includes first end, second end, third end and the 4th end.The first end is electrically connected to institute
State the anode of battery 11+, the second end is for being electrically connected predeterminated voltage VBAT, the third end is electrically connected to the battery 11
Cathode-, the 4th end is electrically connected to the systematically GND.
As shown in figure 5, circuit further includes antenna 31；Alternatively, as shown in figure 4, using the battery as antenna, the battery
11 cathode is as antenna feed point.The circuit further includes high-pass filtering circuit and communication chip；The high-pass filtering circuit electricity
It is connected between the antenna and the communication chip.By this circuit design, low frequency signal can be filtered out.Its
In, the high-pass filtering circuit includes third capacitor, the 4th capacitor and inductance；The third capacitor and the 4th capacitor series connection
Between the antenna and the communication chip, wherein one end of the inductance is connected to the third capacitor and the 4th electricity
Between appearance, described in another termination of the inductance systematically.By this circuit design, a kind of high-pass filtering circuit is provided
Physical circuit form, and high-pass filtering circuit can be designed to lumped circuit in actual design or will be high
Bandpass filter circuit is designed to microstrip filter circuit.
Compared with prior art, present embodiment is made the cathode of battery 11 and is systematically isolated due to isolation circuit 12,
So battery 11 will not generate screen effect to the radiation of antenna 31 even if antenna 31 is close at a distance from battery 11, help
In the reduction occupied space of circuit.
The 4th embodiment of the application is related to a kind of electronic equipment.The electronic equipment includes first, second or third real
Apply the circuit of mode.
It is noted that the electronic equipment of present embodiment can be, but not limited to as earphone, wrist-watch or bracelet, so that can
To improve the versatility of the application.When the circuit of present embodiment is the circuit of second embodiment, antenna can be bluetooth
Antenna, then earphone can be bluetooth headset, wrist-watch can be Bluetooth watch, and bracelet can be bluetooth bracelet etc., herein no longer
Citing.
Compared with prior art, present embodiment can make the occupied small volume of circuit, so as to reduce electronics
The volume of equipment, and since isolation circuit makes the cathode of battery and is systematically isolated, so battery will not be to the spoke of antenna
Penetrate generation screen effect.
It is not difficult to find that present embodiment is apparatus embodiments corresponding with the first, second or third embodiment, this reality
The mode of applying can work in coordination implementation with the first, second or third embodiment.It is mentioned in first, second or third embodiment
Relevant technical details are still effective in the present embodiment, and in order to reduce repetition, which is not described herein again.Correspondingly, this embodiment party
The relevant technical details mentioned in formula are also applicable in the first, second or third embodiment.
Isolation circuit is it will be understood by those skilled in the art that the respective embodiments described above are to realize that the application's is specific
Embodiment, and in practical applications, can to it, various changes can be made in the form and details, without departing from spirit herein
And range.
Claims (17)
1. a kind of circuit, which is characterized in that including battery and for make the cathode of the battery be systematically isolated every
From circuit；
The isolation circuit includes first end, second end, third end and the 4th end；
The first end is electrically connected to the anode of the battery, and the second end is electrically connected to predeterminated voltage, the third end electricity
Be connected to the cathode of the battery, the 4th end be electrically connected to it is described systematically.
2. circuit according to claim 1, which is characterized in that the isolation circuit is that lumped circuit or micro-strip filter
Device circuit.
3. circuit according to claim 2, which is characterized in that the isolation circuit is microstrip filter circuit, comprising: the
One microstrip line, the second microstrip line；
Wherein one end of first microstrip line forms the anode that the first end is electrically connected to the battery, and the other end forms institute
It states second end and is electrically connected to predeterminated voltage；
Wherein one end of second microstrip line forms the cathode that the third end is electrically connected to the battery, and the other end forms institute
State the 4th end be electrically connected to it is described systematically.
4. circuit according to claim 3, which is characterized in that the battery is as first antenna, the cathode of the battery
As antenna feed point, wherein the outer surface of the battery is metal material.
5. circuit according to claim 4, which is characterized in that the working frequency range of the first antenna is 2.4GHz.
6. according to circuit described in claim 4 or 5, which is characterized in that first microstrip line and second microstrip line
Length be the signal wavelength of working frequency range where the first antenna a quarter.
7. circuit according to any one of claims 4 to 6, which is characterized in that the first end is welded on the battery
Anode, the third end fits in the cathode of the battery.
8. circuit according to claim 3, which is characterized in that it further include first capacitor, wherein the one of the first capacitor
End is electrically connected to the second end, and the other end is electrically connected to the 4th end.
9. the circuit according to any one of claim 3-8, which is characterized in that first microstrip line and described second
Microstrip line is serpentine configuration, and length is identical.
10. circuit according to claim 2, which is characterized in that the isolation circuit is lumped circuit, comprising: the
One separation inductance, the second separation inductance and the second capacitor；
Wherein one end of the first separation inductance forms the anode that the first end is electrically connected to the battery, and the other end is formed
The second end is electrically connected to predeterminated voltage；
Wherein one end of the second separation inductance forms the cathode that the third end is electrically connected to the battery, and the other end is formed
4th end be electrically connected to it is described systematically；
Wherein one end of second capacitor is electrically connected to the second end, and the other end is electrically connected to the 4th end.
11. circuit according to claim 2, which is characterized in that the isolation circuit is lumped circuit, including common mode
Choke coil；
The common mode choke includes the first common mode inductance and the second common mode inductance；
A wherein termination battery cathode for first common mode inductance, the other end is connected to the system ground；
A wherein termination anode for second common mode inductance, another termination predeterminated voltage.
12. the circuit according to any one of claim 8-11, which is characterized in that the circuit further includes second day
Line；
Second antenna is less than pre-determined distance at a distance from the battery.
13. circuit according to claim 12, which is characterized in that further include high-pass filtering circuit and communication chip；
The high-pass filtering circuit is connected electrically between second antenna and the communication chip.
14. circuit according to claim 13, which is characterized in that the high-pass filtering circuit includes third capacitor, the 4th
Capacitor and inductance；
The third capacitor and the 4th capacitor are connected between second antenna and the communication chip, the inductance
Wherein one end is connected between the third capacitor and the 4th capacitor, described in another termination of the inductance systematically.
15. circuit described in any one of 2-14 according to claim 1, which is characterized in that the work frequency of second antenna
Section is 2.4GHz.
16. a kind of electronic equipment, which is characterized in that including circuit described in any one of claim 1 to 15.
17. electronic equipment according to claim 16, which is characterized in that the electronic equipment is earphone, wrist-watch or bracelet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/108448 WO2020062078A1 (en) | 2018-09-28 | 2018-09-28 | Circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109496389A true CN109496389A (en) | 2019-03-19 |
Family
ID=65713838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880001712.1A Pending CN109496389A (en) | 2018-09-28 | 2018-09-28 | Circuit and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109496389A (en) |
| WO (1) | WO2020062078A1 (en) |
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| CN106561005A (en) * | 2015-10-01 | 2017-04-12 | 深圳市南方硅谷微电子有限公司 | Wireless mobile device |
| CN207068994U (en) * | 2017-06-09 | 2018-03-02 | 万魔声学科技有限公司 | Battery and electronic equipment |
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| WO2020062078A1 (en) | 2020-04-02 |
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