CN211236271U - Earphone immersion detection circuit - Google Patents
Earphone immersion detection circuit Download PDFInfo
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- CN211236271U CN211236271U CN201922452142.2U CN201922452142U CN211236271U CN 211236271 U CN211236271 U CN 211236271U CN 201922452142 U CN201922452142 U CN 201922452142U CN 211236271 U CN211236271 U CN 211236271U
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- resistor
- main control
- control chip
- earphone
- thermistor
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The utility model provides an earphone immersion detection circuit, which comprises a temperature monitoring circuit and a voltage division monitoring circuit, wherein the temperature monitoring circuit comprises a thermistor, the thermistor is arranged at the periphery of an internal battery, and the resistance value of the thermistor is used for changing along with the surface temperature of the internal battery when a printed circuit board is immersed; the voltage division monitoring circuit is electrically connected with the temperature monitoring circuit and the main control chip respectively, and the output voltage sent to the main control chip by the voltage division monitoring circuit changes along with the resistance value of the thermistor, so that when the output voltage sent to the main control chip by the voltage division monitoring circuit changes, the main control chip disconnects the charging circuit of the earphone. The utility model discloses a real-time supervision is carried out to the temperature of internal battery to thermistor's design, so that when the charging circuit of disconnection earphone when taking place the phenomenon of soaking on the printed circuit board, in order to prevent the earphone from taking place the operation of charging after the phenomenon of soaking, the effectual security that improves the earphone and use.
Description
Technical Field
The utility model relates to an earphone technical field, in particular to earphone detection circuitry that soaks.
Background
With the continuous progress of society and the continuous development of science and technology, the living pressure of people is increased day by day, and various decompression modes are generated, such as wearing earphones, listening to music, immersing a person in the sea of music, and greatly relaxing the body and the spirit, which becomes a living mode of people. Earphones are classified according to their transduction modes, and mainly include a moving coil mode, a moving iron mode, an electrostatic mode, and an isomagnetic mode. Structurally, they can be classified into semi-open type and closed type. The earphone is distinguished from a sound source and can be divided into an active earphone and a passive earphone; active headsets are also known as paddle-card headsets. Therefore, selecting proper earphones according to different occasions has become a symbol of tidal life.
In the use process of the existing earphone, the existing earphone inevitably contacts sweat or rainwater of a human body, after the sweat or rainwater permeates the earphone, a short circuit phenomenon of a printed circuit board in the earphone can be caused, and even when the earphone is charged after entering the rainwater or the sweat, the earphone can be caused to cause safety problems, such as overhigh temperature or product melting and the like, so that the use safety of the earphone is reduced.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides an aim at provides an earphone that can carry out the detection of soaking to the earphone soaks detection circuitry.
The utility model provides an earphone detection circuitry that soaks, locates between main control chip and the internal battery on the printed circuit board in the earphone for it is right printed circuit board soaks and detects, includes:
the temperature monitoring circuit comprises a thermistor electrically connected with the main control chip, the thermistor is arranged on the periphery of the internal battery, and the resistance value of the thermistor is used for changing along with the surface temperature of the internal battery when the printed circuit board is soaked;
the voltage division monitoring circuit is electrically connected with the temperature monitoring circuit and the main control chip respectively, the output voltage sent by the voltage division monitoring circuit to the main control chip changes along with the resistance value of the thermistor, so that when the output voltage sent by the voltage division monitoring circuit to the main control chip changes, the main control chip disconnects the charging circuit of the earphone.
Above-mentioned earphone detection circuitry that soaks, through thermistor's design, can be effectual right the temperature of inside battery carries out real-time supervision, so that when because take place when soaking on the printed circuit board, the short circuit can take place on the printed circuit board, leads to the electric current on the printed circuit board promotes, inside battery discharge current increase, and discharge rate accelerates, thereby inside battery is peripheral because of discharge rate promotes, and its body surface temperature must rise rapidly, makes thermistor's resistance changes, leads to partial pressure monitoring circuitry's output voltage changes, and then judges that the earphone has taken place to soak to through the charging circuit of main control chip disconnection earphone, with the charging operation of preventing the earphone after taking place the phenomenon of soaking, the effectual security that improves the earphone and use.
Further, the temperature monitoring circuit comprises a first resistor and a second resistor which are respectively connected with the thermistor in series, a third resistor which is connected with the second resistor in series and a first capacitor which is connected with the third resistor in parallel.
Furthermore, the input ends of the first capacitor, the second resistor and the third resistor are electrically connected with an ADC port of the earphone, the output end of the first resistor is electrically connected with a VIO port of the main control chip, and the output end of the thermistor is connected with the ground.
Further, the voltage division monitoring circuit comprises a fourth resistor, a fifth resistor, a second capacitor, a sixth resistor and a second capacitor, wherein the fifth resistor, the second capacitor and the sixth resistor are respectively connected with the fourth resistor in series, and the second capacitor is connected with the sixth resistor in series.
Furthermore, the fourth resistor is electrically connected with the VIO port of the main control chip, and the sixth resistor is electrically connected with the ADC port of the earphone.
Furthermore, a diode is arranged between the fourth resistor and the main control chip, and the output ends of the diode, the fifth resistor and the second capacitor are all connected with the ground.
Furthermore, the resistance values of the first resistor, the second resistor and the third resistor are all 10k, and the capacity of the first capacitor is 100 nf.
Furthermore, the resistance values of the fourth resistor and the fifth resistor are both 330k, the resistance value of the sixth resistor is 10k, and the capacity of the second capacitor is 100 nf.
Further, the diode is a zener diode.
Drawings
Fig. 1 is a schematic structural diagram of an earphone immersion detection circuit according to a first embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of the temperature monitoring circuit of FIG. 1;
FIG. 3 is a schematic circuit diagram of the voltage division monitoring circuit of FIG. 1;
fig. 4 is a schematic circuit diagram of a voltage division monitoring circuit according to a second embodiment of the present invention;
description of the symbols of the main elements
| Earphone |
100 | Voltage |
10 |
| |
11 | |
12 |
| Internal battery | 13 | A first resistor | R8 |
| Second resistance | R6 | Third resistance | R2 |
| Fourth resistor | R34 | Fifth resistor | R33 |
| Sixth resistor | R12 | First capacitor | C30 |
| Second capacitor | C34 | Diode with a high-voltage source | E8 |
| Thermal resistor | R7 |
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1 to 3, a first embodiment of the present invention provides an earphone immersion detecting circuit 100, which is disposed between a main control chip 12 and an internal battery 13 on a printed circuit board in an earphone, and is used for detecting immersion of the printed circuit board, including:
the temperature monitoring circuit 11 comprises a thermistor R7 electrically connected with the main control chip 12, the thermistor R7 is arranged on the periphery of the internal battery 13, the resistance value of the thermistor R7 is used for changing along with the surface temperature of the internal battery 13 when the printed circuit board is soaked, and the temperature of the internal battery 13 can be effectively monitored in real time through the design of the thermistor R7.
The voltage division monitoring circuit 10 is electrically connected with the temperature monitoring circuit 11 and the main control chip 12, and the output voltage sent by the voltage division monitoring circuit 10 to the main control chip 12 changes with the resistance of the thermistor R7, so that when the output voltage sent by the voltage division monitoring circuit 10 to the main control chip 12 changes, the main control chip 12 disconnects the charging circuit of the earphone.
In this embodiment, the temperature monitoring circuit 11 includes a first resistor R8 and a second resistor R6 respectively connected in series with the thermistor R7, a third resistor R2 connected in series with the second resistor R6, and a first capacitor C30 connected in parallel with the third resistor R2, the input terminals of the first capacitor C30, the second resistor R6, and the third resistor R2 are all electrically connected to the ADC port of the earphone, the output terminal of the first resistor R8 is electrically connected to the VIO port of the main control chip 12, and the output terminal of the thermistor R7 is connected to ground.
Specifically, the voltage division monitoring circuit 10 includes a fourth resistor 34, a fifth resistor R33, a second capacitor C34, a sixth resistor R12 connected in series with the fourth resistor 34, and a second capacitor C34 connected in series with the sixth resistor R12, where the fourth resistor 34 is electrically connected to the VIO port of the main control chip 12, and the sixth resistor R12 is electrically connected to the ADC port of the earphone.
Preferably, the resistances of the first resistor R8, the second resistor R6 and the third resistor R2 are all 10k, the capacity of the first capacitor C30 is 100nf, the resistances of the fourth resistor 34 and the fifth resistor R33 are all 330k, and the resistance of the sixth resistor R12 is 10 k.
In this embodiment, through thermistor R7's design, can be effectual right real-time supervision is carried out to internal battery's 13 temperature, so that when because take place when soaking the phenomenon on the printed circuit board, the short circuit can take place on the printed circuit board, leads to the last electric current of printed circuit board promotes, internal battery 13 discharge current increase, and discharge rate accelerates, thereby internal battery 13 is peripheral to promote because of discharge rate, and its body surface temperature must rise rapidly, makes thermistor R7's resistance changes, leads to the output voltage of partial pressure monitoring circuit 10 changes, and then judges that the earphone has taken place to soak to through the charging circuit of main control chip 12 disconnection earphone, in order to prevent the charging operation of earphone after taking place the soaking phenomenon, the effectual security that improves the earphone and use.
Please refer to fig. 4, which is a schematic circuit diagram of a voltage division monitoring circuit 10 according to a second embodiment of the present invention, the second embodiment has a structure substantially the same as that of the first embodiment, and the difference is that a diode E8 is disposed between the fourth resistor 34 and the main control chip 12, and output ends of the diode E8, the fifth resistor R33 and the second capacitor C34 are all connected to ground. Specifically, the diode E8 is a voltage regulator diode, and the capacity of the second capacitor C34 is 100nf, in this embodiment, through the design of the diode E8, a voltage regulation effect is effectively achieved between the voltage division monitoring circuit 10 and the main control chip 12, and the stability of the circuit structure is improved.
The above-described embodiments describe the technical principles of the present invention, and these descriptions are only for the purpose of explaining the principles of the present invention, and should not be interpreted as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. The utility model provides an earphone detection circuitry that soaks, locates between main control chip and the internal battery on the printed circuit board in the earphone, be used for right printed circuit board soaks and detects, its characterized in that includes:
the temperature monitoring circuit comprises a thermistor electrically connected with the main control chip, the thermistor is arranged on the periphery of the internal battery, and the resistance value of the thermistor is used for changing along with the surface temperature of the internal battery when the printed circuit board is soaked;
the voltage division monitoring circuit is electrically connected with the temperature monitoring circuit and the main control chip respectively, the output voltage sent by the voltage division monitoring circuit to the main control chip changes along with the resistance value of the thermistor, so that when the output voltage sent by the voltage division monitoring circuit to the main control chip changes, the main control chip disconnects the charging circuit of the earphone.
2. The headset submersion detection circuit of claim 1, wherein the temperature monitoring circuit comprises first and second resistors in series with the thermistor, respectively, a third resistor in series with the second resistor, and a first capacitor in parallel with the third resistor.
3. The headset submergence detecting circuit of claim 2, wherein the input ends of the first capacitor, the second resistor and the third resistor are electrically connected with an ADC port of a headset, the output end of the first resistor is electrically connected with a VIO port of the main control chip, and the output end of the thermistor is connected with ground.
4. The headset submersion detection circuit of claim 1, wherein the voltage division monitoring circuit comprises a fourth resistor, a fifth resistor, a second capacitor, and a sixth resistor each connected in series with the fourth resistor, and a second capacitor connected in series with the sixth resistor.
5. The headset submersion detection circuit of claim 4, wherein the fourth resistor is electrically connected to the VIO port of the main control chip, and the sixth resistor is electrically connected to the ADC port of the headset.
6. The headset submergence detecting circuit of claim 4, wherein a diode is arranged between the fourth resistor and the main control chip, and output ends of the diode, the fifth resistor and the second capacitor are all connected with ground.
7. The headset submergence detecting circuit of claim 2, wherein the first resistor, the second resistor and the third resistor are all 10k in resistance, and the first capacitor has a capacity of 100 nf.
8. The headset submergence detecting circuit of claim 6, wherein the fourth resistor and the fifth resistor are both 330k, the sixth resistor is 10k, and the second capacitor is 100 nf.
9. The headset submersion detection circuit of claim 6, wherein the diode is a zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922452142.2U CN211236271U (en) | 2019-12-30 | 2019-12-30 | Earphone immersion detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922452142.2U CN211236271U (en) | 2019-12-30 | 2019-12-30 | Earphone immersion detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211236271U true CN211236271U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922452142.2U Active CN211236271U (en) | 2019-12-30 | 2019-12-30 | Earphone immersion detection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN211236271U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649671A (en) * | 2020-12-15 | 2021-04-13 | Oppo广东移动通信有限公司 | Detection circuit and detection method of electronic equipment and electronic equipment |
| CN112838650A (en) * | 2021-03-19 | 2021-05-25 | 东莞市漫步者电竞科技有限公司 | Charging method of earphone charging box and earphone charging box |
| CN113466738A (en) * | 2021-05-31 | 2021-10-01 | 广东朝阳电子科技股份有限公司 | Short circuit detection circuit |
| CN115296377A (en) * | 2022-09-30 | 2022-11-04 | 荣耀终端有限公司 | Electronic device |
-
2019
- 2019-12-30 CN CN201922452142.2U patent/CN211236271U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649671A (en) * | 2020-12-15 | 2021-04-13 | Oppo广东移动通信有限公司 | Detection circuit and detection method of electronic equipment and electronic equipment |
| CN112838650A (en) * | 2021-03-19 | 2021-05-25 | 东莞市漫步者电竞科技有限公司 | Charging method of earphone charging box and earphone charging box |
| CN113466738A (en) * | 2021-05-31 | 2021-10-01 | 广东朝阳电子科技股份有限公司 | Short circuit detection circuit |
| CN115296377A (en) * | 2022-09-30 | 2022-11-04 | 荣耀终端有限公司 | Electronic device |
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