CN213880187U - Earphone, charging box and earphone equipment - Google Patents
Earphone, charging box and earphone equipment Download PDFInfo
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- CN213880187U CN213880187U CN202022827307.2U CN202022827307U CN213880187U CN 213880187 U CN213880187 U CN 213880187U CN 202022827307 U CN202022827307 U CN 202022827307U CN 213880187 U CN213880187 U CN 213880187U
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Abstract
The utility model discloses an earphone, a charging box and earphone equipment, wherein an earphone carrier communication unit is arranged in the earphone, the earphone carrier communication unit is respectively electrically connected with an earphone main control unit and an earphone charging contact, the earphone carrier communication unit comprises an earphone coding circuit and an earphone decoding circuit, and the earphone coding circuit loads a communication signal output by the earphone main control unit to the earphone charging contact; the earphone decoding circuit decodes the communication signal accessed by the earphone charging contact and transmits the decoded signal to the earphone main control unit, namely, the earphone can communicate with the external equipment by using the earphone carrier communication unit and the earphone charging contact; the charging box is internally provided with a box carrier communication unit, is the same as the earphone and can simultaneously communicate and charge with external equipment by virtue of a box charging contact; therefore, the earphone equipment provided with the earphone and the charging box adopts the carrier communication unit to realize simultaneous communication and charging, thereby ensuring the charging efficiency and realizing normal communication.
Description
Technical Field
The utility model relates to an electroacoustic product technical field especially relates to an earphone, box and earphone equipment charge.
Background
The TWS earphone and the charging box which are used in a matched mode in the prior art usually adopt 3PIN or time division multiplexing switch type 2PIN for communication, but the two communication modes have obvious defects:
3PIN communication mode needs to occupy a dedicated POGO PIN more (the chinese means is spring probe), and 4 POGO PINs are increased to 2PIN communication modes in general, and POGO PIN needs to have anticorrosive, and the impedance is low, and the contact is good etc. requires POGO PIN to have various protection aspect, and SMT and the input in the aspect of the equipment, the cost is higher, consequently most adopts 2PIN communication mode now.
In the time-sharing multiplexing switch type 2PIN communication mode, four analog switches are required to be added for controlling a signal link, a large amount of switch control and control of various limit conditions are required to be performed by software under the condition of the communication mode, and meanwhile, the communication speed cannot be too high due to the influence of the switching frequency. The communication mode is a time-sharing multiplexing mode, and the charging efficiency and the charging time are influenced because the communication and the charging cannot be carried out simultaneously.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: the utility model provides an earphone, box and earphone equipment charge, can communicate simultaneously and charge, both guaranteed charge efficiency, can normally communicate again.
In order to solve the technical problem, the technical scheme of the utility model is that:
an earphone is provided with an earphone main control unit and an earphone charging contact, and is also provided with an earphone carrier communication unit, wherein the earphone carrier communication unit is respectively and electrically connected with the earphone main control unit and the earphone charging contact; the earphone carrier communication unit comprises an earphone encoding circuit and an earphone decoding circuit, and the earphone encoding circuit loads the communication signals output by the earphone main control unit to the earphone charging contact; and the earphone decoding circuit decodes the communication signal accessed by the earphone charging contact and transmits the decoded signal to the earphone main control unit.
Preferably, an earphone filtering unit is further arranged in the earphone, and the earphone filtering unit is electrically connected with the earphone charging contact.
Preferably, the earphone encoding circuit includes a first dc blocking capacitor.
Preferably, the earphone decoding circuit comprises a second blocking capacitor, a first comparison circuit, a third blocking capacitor and a second comparison circuit; one end of the second direct current blocking capacitor is electrically connected with the earphone charging contact, the other end of the second direct current blocking capacitor is electrically connected with the input end of the first comparison circuit, the output end of the first comparison circuit is electrically connected with the earphone main control unit, and a down-shoot reference voltage value is arranged in the first comparison circuit; one end of the third DC blocking capacitor is electrically connected with the earphone charging contact, the other end of the third DC blocking capacitor is electrically connected with the input end of the second comparison circuit, the output end of the second comparison circuit is electrically connected with the earphone main control unit, and an upper punch reference voltage value is arranged in the second comparison circuit.
Preferably, the earphone is a bluetooth earphone, and the bluetooth earphone comprises a left earphone and a right earphone which are identical in structure.
A charging box matched with the earphone is provided with a box main control unit, a box charging contact and a box carrier communication unit, wherein the box carrier communication unit is respectively and electrically connected with the box main control unit and the box charging contact; the box carrier communication unit comprises a box coding circuit and a box decoding circuit, and the box coding circuit loads the communication signals output by the box main control unit to the box charging contact; and the box decoding circuit decodes the communication signal accessed by the box charging contact and then transmits the decoded signal to the box main control unit.
Preferably, a box filtering unit and a charging unit are further arranged in the charging box; the charging unit is electrically connected with the box main control unit; the cartridge filter unit is electrically connected with the charging unit and the cartridge charging contact, respectively.
Preferably, the box coding circuit includes a fourth dc blocking capacitor.
Preferably, the box decoding circuit comprises a fifth dc blocking capacitor, a third comparison circuit, a sixth dc blocking capacitor and a fourth comparison circuit; one end of the fifth direct current isolating capacitor is electrically connected with the box charging contact, the other end of the fifth direct current isolating capacitor is electrically connected with the input end of the third comparison circuit, the output end of the third comparison circuit is electrically connected with the box main control unit, and a down-stroke reference voltage value is arranged in the third comparison circuit; one end of the sixth direct current isolating capacitor is electrically connected with the box charging contact, the other end of the sixth direct current isolating capacitor is electrically connected with the input end of the fourth comparison circuit, the output end of the fourth comparison circuit is electrically connected with the box main control unit, and an upper punch reference voltage value is arranged in the fourth comparison circuit.
An earphone device comprises the earphone and the charging box.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because the utility model discloses an earphone, charging box and earphone equipment, wherein set up earphone carrier communication unit in the earphone, earphone carrier communication unit is connected with earphone main control unit and earphone charging contact electricity respectively, and earphone carrier communication unit includes earphone coding circuit and earphone decoding circuit, and earphone coding circuit loads the communication signal of earphone main control unit output to earphone charging contact; the earphone decoding circuit decodes the communication signal accessed by the earphone charging contact and transmits the decoded signal to the earphone main control unit, namely, the earphone can communicate with the external equipment by using the earphone carrier communication unit and the earphone charging contact; the charging box is internally provided with a box carrier communication unit, is the same as the earphone and can simultaneously communicate and charge with external equipment through a box charging contact; therefore, the earphone equipment provided with the earphone and the charging box can communicate and charge at the same time, the charging efficiency is ensured, and the communication can be normal.
Because the earphone is also internally provided with the earphone filtering unit, the earphone filtering unit is electrically connected with the earphone charging contact; and the filtering and voltage stabilization in the earphone are realized, and the communication quality is ensured.
The box filtering unit and the charging unit are also arranged in the charging box; the charging unit is electrically connected with the box main control unit; the box filtering unit is electrically connected with the charging unit and the box charging contact respectively; realize the interior filtering of charging box and steady voltage, guarantee communication quality.
Drawings
Fig. 1 is a schematic structural diagram of the earphone device of the present invention;
fig. 2 is a schematic block diagram of the earphone device of the present invention;
FIG. 3 is a waveform diagram of the encoding process of the encoding circuit of the present invention;
FIG. 4 is a waveform diagram of the decoding process of the decoding circuit of the present invention;
in the figure: the earphone charging system comprises a box main control unit 1, a charging unit 2, an earphone main control unit 3, a power management unit 4, a box charging contact 5, an earphone charging contact 6 and a box carrier communication unit 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and fig. 2, in the earphone, an earphone main control unit 3 and an earphone charging contact 6 are arranged, and an earphone carrier communication unit is further arranged in the earphone and is electrically connected with the earphone main control unit 3 and the earphone charging contact 6 respectively; the earphone carrier communication unit comprises an earphone coding circuit and an earphone decoding circuit, and the earphone coding circuit loads the communication signals output by the earphone main control unit 3 to the earphone charging contact 6; the earphone decoding circuit decodes the communication signal accessed by the earphone charging contact 6 and transmits the decoded signal to the earphone main control unit 3.
The utility model discloses an earphone, when communication signal loads on earphone charging contact 6, after communication signal transmitted to earphone decoding circuit through earphone charging contact 6, earphone decoding circuit decoded communication signal, transmitted to earphone main control unit 3; and the communication signal of earphone master control unit 3 output, accessible earphone coding circuit loading to earphone charging contact 6, by the outer biography of earphone charging contact 6, the earphone can utilize earphone charging contact 6 to communicate.
The following are specifically mentioned: the earphone is a Bluetooth earphone which comprises a left earphone and a right earphone which are the same in structure, and earphone carrier communication units are arranged in the left earphone and the right earphone.
As shown in fig. 2, in order to ensure the communication quality, the overshoot voltage and the undershoot voltage loaded on the charging contact 6 of the headset may exceed 2V, which inevitably causes the ripple of the power supply system to be very large, and may even exceed 500mV to 1000mV, causing the instability of the headset system to cause the breakdown of the whole system. Based on this earphone has set up the earphone filter unit in, and the earphone filter unit is connected with earphone charging contact 6 electricity, and the earphone filter unit still is connected with power management unit 4 electricity, and this power management unit 4 is including the earphone battery and the management circuit that charges of electricity connection.
In this example: the earphone filter circuit is an LC filter circuit and specifically comprises a first filter inductor L1 and a first filter capacitor C8. The first filter inductor L1 is connected in series between the power management unit 4 and the earphone charging contact 6, one end of the first filter capacitor C8 is grounded to GND1, and the other end is electrically connected to the power management unit 4. The values of the first filter inductor L1 and the first filter capacitor C8 can be adjusted according to the communication frequency, the magnitude of the overshoot voltage value and the undershoot voltage value, the ripple can be controlled within 80mV, and no interference is caused to the earphone system.
As shown in fig. 2, the earphone encoding circuit includes a first dc blocking capacitor C1, one end of the first dc blocking capacitor C1 is electrically connected to the earphone main control unit 3, and the other end is electrically connected to the earphone charging contact 6. The earphone main control unit 3 outputs a square wave signal (communication signal), and the square wave signal is coupled to the earphone charging contact 6 through a first direct current blocking capacitor C1; the earphone coding circuit mainly utilizes the function of blocking direct current and alternating current of the capacitor, and plays the roles of coupling signals and isolating direct current signals.
As shown in fig. 2, the earphone decoding circuit includes a second dc blocking capacitor C2, a first comparison circuit, a third dc blocking capacitor C3, and a second comparison circuit.
One end of the second dc blocking capacitor C2 is electrically connected to the earphone charging contact 6, and the other end is electrically connected to the input end of the first comparison circuit.
The first comparison circuit comprises a first comparator U1, a bias resistor R1 and a bias resistor R2, the bias resistor R1 and the bias resistor R2 are connected in series, a connecting point of the series connection is electrically connected with an input end of the first comparator U1, the other end of the bias resistor R1 is connected with a voltage VCC1, the other end of the bias resistor R2 is grounded GND1, an undershoot voltage reference value V1_ down is arranged in the first comparator U1, and an output end of the first comparator U1 is electrically connected with the earphone main control unit 3.
One end of the third dc blocking capacitor C3 is electrically connected to the earphone charging contact 6, and the other end is electrically connected to the input end of the second comparing circuit.
The second comparison circuit comprises a second comparator U2, a bias resistor R3 and a bias resistor R4, the bias resistor R3 and the bias resistor R4 are connected in series, a connection point of the series connection is electrically connected with an input end of the second comparator U2, the other end of the bias resistor R3 is connected with a voltage VCC1, the other end of the bias resistor R4 is grounded GND1, an overshoot voltage reference value V1_ up is arranged in the second comparator U2, and an output end of the second comparator U2 is electrically connected with the earphone main control unit 3.
Fig. 3 is a waveform diagram illustrating a process of coupling the output communication signal of the headset main control unit to the headset charging contact, as shown in fig. 3. The earphone main control unit outputs square wave signals (communication signals), when the square waves are stable at a low level, the first direct current blocking capacitor C1 plays a role in isolating the direct current signals, and at the moment, no waveform exists on the earphone charging contact; the rising edge of the square wave is coupled to the charging contact of the earphone by utilizing the function of the first DC blocking capacitor C1 for communicating an alternating current signal, and a voltage uprush is formed on the charging contact of the earphone; when the square wave stabilizes the high level, the first DC blocking capacitor C1 plays a role of isolating the DC signal, and the charging contact of the earphone returns to the low level again; the falling edge of the square wave is coupled to the charging contact of the earphone by the action of the first DC blocking capacitor C1 communicated with an alternating current signal, and a voltage undershoot is formed on the charging contact of the earphone; when the square wave returns to the low level again, the first direct current blocking capacitor C1 plays a role in isolating direct current signals, and no waveform exists on the charging contact of the earphone; this completes the process of coupling the square wave signal to the headset charging contacts.
As shown in fig. 4, fig. 4 is a waveform diagram of a process of the headset main control unit reading a communication signal accessed by a headset charging contact. The charging contact of the earphone is coupled with the voltage overshoot and the voltage undershoot of the square wave signal. During the stable period of the charging contact of the earphone, the second DC blocking capacitor C2 and the third DC blocking capacitor C3 play a role in isolation, the first comparator U1 and the second comparator U2 do not have input signals, and the earphone main control unit keeps the original level state; when the voltage loaded by the charging contact of the earphone rises, the second direct current blocking capacitor C2 and the third direct current blocking capacitor C3 are coupled to the input ends of the first comparator U1 and the second comparator U2, the second comparator U2 detects the value of the rising voltage, and when the value of the rising voltage exceeds the reference value V1_ up of the rising voltage, the output end of the second comparator U2 pulls up and maintains the main control unit of the earphone; the voltage loaded by the charging contact of the earphone is undershot, the second direct current blocking capacitor C2 and the third direct current blocking capacitor C3 are coupled to the input ends of the first comparator U1 and the second comparator U2, the first comparator U1 detects the undershoot voltage value, and when the undershoot voltage value exceeds the undershoot voltage reference value V1_ down, the output end of the first comparator U1 pulls up and maintains the earphone main control unit; the process realizes the restoration of the up and down punch signals on the charging contact of the earphone to the original square wave signals.
As shown in fig. 1 and 2, a charging box used with the above earphone, a box main control unit 1, a box charging contact 5 and a box carrier communication unit 7 are arranged in the charging box, and the box carrier communication unit 7 is electrically connected with the box main control unit 1 and the box charging contact 5 respectively; the box carrier communication unit 7 comprises a box coding circuit and a box decoding circuit, and the box coding circuit loads the communication signal output by the box main control unit 1 to the box charging contact 5; the cartridge decoding circuit decodes the communication signal accessed by the cartridge charging contact 5 and transmits the decoded signal to the cartridge main control unit 1.
The utility model discloses a charging box, when the box charges on contact 5 and has loaded communication signal, after transmitting to box decoding circuit, box decoding circuit transmits to box main control unit 1 after decoding communication signal; and the communication signal that box main control unit 1 output can load to box charging contact 5 through box coding circuit, is passed outward by box charging contact 5, and the box that charges utilizes box charging contact 5 to communicate.
As shown in fig. 2, a box filtering unit and a charging unit 2 are further arranged in the charging box, and the charging unit 2 is electrically connected with the box main control unit 1; the input end of the box filter unit is electrically connected with the output end of the charging unit 2, and the output end of the box filter unit is electrically connected with the box charging contact 5.
The box filter circuit is an LC filter circuit and specifically comprises a second filter inductor L2 and a second filter capacitor C9. The second filter inductor L2 is connected in series between the charging unit 2 and the box charging contact 5, one end of the second filter capacitor C9 is grounded GND, and the other end is electrically connected to the output end of the charging unit 2. The values of the second filter inductor L2 and the second filter capacitor C9 can be adjusted according to the communication frequency and the magnitudes of the overshoot voltage value and the undershoot voltage value, so that the ripple can be controlled within 80mV, and no interference is caused to the system.
As shown in fig. 2, the cartridge coding circuit includes a fourth dc blocking capacitor C4, one end of the fourth dc blocking capacitor C4 is electrically connected to the cartridge main control unit 1, and the other end is electrically connected to the cartridge charging contact 5. The cartridge main control unit 1 outputs a square wave signal (communication signal) which is coupled to the cartridge charging contact 5 through a fourth dc blocking capacitor C4; the box coding circuit mainly utilizes the functions of coupling signals and isolating direct current signals by using a capacitor to isolate direct current and alternating current.
As shown in fig. 2, the box decoding circuit includes a fifth dc blocking capacitor C5, a third comparison circuit, a sixth dc blocking capacitor C6, and a fourth comparison circuit.
One end of the fifth dc blocking capacitor C5 is electrically connected to the box charging contact 5, and the other end is electrically connected to the input terminal of the third comparator circuit.
The third comparison circuit comprises a third comparator U3, a bias resistor R5 and a bias resistor R6, the bias resistor R5 and the bias resistor R6 are connected in series, a connecting point of the series connection is electrically connected with an input end of the third comparator U3, the other end of the bias resistor R5 is connected with a voltage VCC, the other end of the bias resistor R6 is grounded GND, an undershoot voltage reference value V2_ down is arranged in the third comparator U3, and an output end of the third comparator U3 is electrically connected with the box main control unit 1.
One end of the sixth dc blocking capacitor C6 is electrically connected to the box charging contact 5, and the other end is electrically connected to the input terminal of the fourth comparator circuit.
The fourth comparison circuit comprises a fourth comparator U4, a bias resistor R7 and a bias resistor R8, the bias resistor R7 and the bias resistor R8 are connected in series, a connecting point of the series connection is electrically connected with an input end of the fourth comparator U4, the other end of the bias resistor R7 is connected with a voltage VCC, the other end of the bias resistor R8 is grounded GND, an overshoot voltage reference value V2_ up is arranged in the fourth comparator U4, and an output end of the fourth comparator U4 is electrically connected with the box main control unit 1.
Fig. 3 is a waveform diagram of a process of transmitting a communication signal output by the cartridge main control unit to be coupled to the cartridge charging contacts, as shown in fig. 3. The box main control unit outputs square wave signals (communication signals), when the square waves are stable at a low level, the fourth direct current isolating capacitor C4 plays a role in isolating direct current information, and at the moment, no waveform exists on the box charging contact; the rising edge of the square wave is communicated with an alternating current signal by using a fourth DC blocking capacitor C4, the coupling capacitor is coupled to the box charging contact, and a voltage uprush is formed on the box charging contact; when the square wave stabilizes the high level, the fourth DC blocking capacitor C4 plays a role of isolating the DC signal, and the box charging contact returns to the low level again; the falling edge of the square wave is coupled to the box charging contact through the coupling capacitor under the action of the fourth DC blocking capacitor C4 communicated with the alternating current signal, and a voltage undershoot is formed on the box charging contact; when the square wave returns to the low level again, the fourth DC blocking capacitor C4 plays a role of isolating the DC signal, and no waveform exists on the charging contact of the box; this completes the process of coupling the square wave signal to the cartridge charging contacts.
As shown in fig. 4, fig. 4 is a waveform diagram of a process of the cartridge main control unit reading a communication signal accessed by the cartridge charging contact. The cartridge charging contacts couple the overshoot and undershoot of externally accessed (e.g., headphone) square wave data. In the stable period of the box charging contact, the fifth DC blocking capacitor C5 and the sixth DC blocking capacitor C6 play a role in isolation, the third comparator U3 and the fourth comparator U4 do not have input signals, and the box main control unit keeps the original level state; a box charging contact overshoot part, wherein a fifth direct current blocking capacitor C5 and a sixth direct current blocking capacitor C6 are coupled to input ends of a third comparator U3 and a fourth comparator U4, the fourth comparator U4 detects an overshoot voltage value, and when the overshoot voltage value exceeds an overshoot voltage reference value V2_ up, the output end of the fourth comparator U4 pulls up and maintains a box main control unit; a box charging contact undershoot part, wherein a fifth direct current blocking capacitor C5 and a sixth direct current blocking capacitor C6 are coupled to input ends of a third comparator U3 and a fourth comparator U4, the third comparator U3 detects an undershoot voltage value, and when the undershoot voltage value exceeds an undershoot voltage reference value V2_ down set value, the output end of a third comparator U3 pulls up and maintains a box main control unit; this process achieves the restoration of the up and down undershoot signals on the cartridge charging contacts to the original square wave signal.
As shown in fig. 1 and 2, an earphone device includes the earphone and the charging box.
The utility model discloses an earphone equipment, earphone are put back on the box that charges, and the contact of the box contact 5 that charges switches on in the earphone contact 6 that charges. The battery in the charging box and the charging unit 2 charge the earphone through the box charging contact 5 and the earphone charging contact 6. When the box main control unit 1 outputs a communication signal, the communication signal is loaded to the box charging contact 5 through the box coding circuit, the earphone is connected to the earphone through the earphone charging contact 6, the communication signal is decoded by the earphone decoding circuit and then transmitted to the earphone main control unit 3, and communication between the charging box and the earphone is achieved. Similarly, after the earphone main control unit 3 outputs the communication signal, the earphone coding circuit is loaded to the earphone charging contact 6 and connected to the box decoding circuit through the box charging contact 5, and the box decoding circuit decodes the communication signal and transmits the decoded communication signal to the box main control unit 1, so that the communication between the earphone and the charging box is realized.
To sum up, the utility model discloses an earphone device through set up corresponding coding circuit and decoding circuit in earphone and charging box, has realized charging and communication and has gone on simultaneously, and does not have the interference each other, has guaranteed charging efficiency.
The above-described preferred embodiments of the present invention are not intended to limit the present invention, and any modifications, improvements, etc. of the same earphone device made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. An earphone is provided with an earphone main control unit and an earphone charging contact, and is characterized in that an earphone carrier communication unit is further arranged in the earphone and is respectively and electrically connected with the earphone main control unit and the earphone charging contact;
the earphone carrier communication unit comprises an earphone encoding circuit and an earphone decoding circuit, and the earphone encoding circuit loads the communication signals output by the earphone main control unit to the earphone charging contact; and the earphone decoding circuit decodes the communication signal accessed by the earphone charging contact and transmits the decoded signal to the earphone main control unit.
2. The headset of claim 1, further comprising a headset filter unit disposed within the headset, the headset filter unit being electrically connected to the headset charging contact.
3. The headset of claim 1, wherein the headset encoding circuit comprises a first dc blocking capacitor.
4. The headset of claim 1, wherein the headset decoding circuit comprises a second dc blocking capacitor, a first comparison circuit, a third dc blocking capacitor, and a second comparison circuit;
one end of the second direct current blocking capacitor is electrically connected with the earphone charging contact, the other end of the second direct current blocking capacitor is electrically connected with the input end of the first comparison circuit, the output end of the first comparison circuit is electrically connected with the earphone main control unit, and a down-shoot reference voltage value is arranged in the first comparison circuit;
one end of the third DC blocking capacitor is electrically connected with the earphone charging contact, the other end of the third DC blocking capacitor is electrically connected with the input end of the second comparison circuit, the output end of the second comparison circuit is electrically connected with the earphone main control unit, and an upper punch reference voltage value is arranged in the second comparison circuit.
5. A headset according to any of claims 1 to 4, wherein the headset is a Bluetooth headset comprising left and right headsets of the same configuration.
6. A charging box for use with the headset of any one of claims 1 to 5, wherein a box main control unit, a box charging contact and a box carrier communication unit are provided in the charging box, the box carrier communication unit being electrically connected to the box main control unit and the box charging contact, respectively;
the box carrier communication unit comprises a box coding circuit and a box decoding circuit, and the box coding circuit loads the communication signals output by the box main control unit to the box charging contact; and the box decoding circuit decodes the communication signal accessed by the box charging contact and then transmits the decoded signal to the box main control unit.
7. The charging box according to claim 6, wherein a box filtering unit and a charging unit are further provided in the charging box;
the charging unit is electrically connected with the box main control unit;
the cartridge filter unit is electrically connected with the charging unit and the cartridge charging contact, respectively.
8. A charging box according to claim 6, characterised in that the box coding circuit comprises a fourth dc blocking capacitance.
9. The charging box according to claim 6, wherein the box decoding circuit comprises a fifth dc blocking capacitor, a third comparison circuit, a sixth dc blocking capacitor, and a fourth comparison circuit;
one end of the fifth direct current isolating capacitor is electrically connected with the box charging contact, the other end of the fifth direct current isolating capacitor is electrically connected with the input end of the third comparison circuit, the output end of the third comparison circuit is electrically connected with the box main control unit, and a down-stroke reference voltage value is arranged in the third comparison circuit;
one end of the sixth direct current isolating capacitor is electrically connected with the box charging contact, the other end of the sixth direct current isolating capacitor is electrically connected with the input end of the fourth comparison circuit, the output end of the fourth comparison circuit is electrically connected with the box main control unit, and an upper punch reference voltage value is arranged in the fourth comparison circuit.
10. An earphone device characterized by comprising the earphone of any one of claims 1 to 5 and the charging box of any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022827307.2U CN213880187U (en) | 2020-11-30 | 2020-11-30 | Earphone, charging box and earphone equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022827307.2U CN213880187U (en) | 2020-11-30 | 2020-11-30 | Earphone, charging box and earphone equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213880187U true CN213880187U (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022827307.2U Active CN213880187U (en) | 2020-11-30 | 2020-11-30 | Earphone, charging box and earphone equipment |
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| CN (1) | CN213880187U (en) |
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Effective date of registration: 20230417 Address after: 18/F, Building 2, Shandong Private Science and Technology Building (Minghui International), No. 39 Shiling Road, Laoshan District, Qingdao City, Shandong Province, 266035 (centralized office area) Patentee after: Qingdao Suiyun Electronic Technology Co.,Ltd. Address before: 266104 Room 308, North Investment Street Service Center, Laoshan District, Qingdao, Shandong. Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |