CN214069619U - External charging current detection circuit of sound box and sound box - Google Patents
External charging current detection circuit of sound box and sound box Download PDFInfo
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- CN214069619U CN214069619U CN202022899217.4U CN202022899217U CN214069619U CN 214069619 U CN214069619 U CN 214069619U CN 202022899217 U CN202022899217 U CN 202022899217U CN 214069619 U CN214069619 U CN 214069619U
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Abstract
The utility model relates to an external charging current detection circuit of audio amplifier and audio amplifier, an external charging current detection circuit of audio amplifier is including detecting the module, detect the infrared induction module that the module coupling is used for cutting off or closed detection module power supply loop, infrared induction module infrared induction unit, signal comparison unit and switch unit, the switch unit is coupled in signal comparison unit and establishes ties in order to export the power supply loop of switch signal in order to cut off detection module when receiving infrared comparison signal in the power supply loop of detection module. The power supply circuit has the advantages that the switch unit sends the switch signal to turn off the power supply circuit of the detection module, the detection module does not generate the current limiting effect on the external charging of the storage battery, the electronic mobile equipment of a user is charged quickly at the moment, and the effect of switching the current limiting state of the detection module to meet the requirements of the user is achieved.
Description
Technical Field
The application relates to the technical field of charging of sound boxes, in particular to an external charging current detection circuit of a sound box and the sound box.
Background
A speaker refers to a device that can convert an audio signal into sound. The popular way is that a power amplifier is arranged in a main box body or a bass box body of the sound box, and the sound is emitted back by the sound box after the audio signal is amplified, so that the sound is increased.
At present, storage batteries are designed in a sound box, and some storage batteries provide an external charging function; the mobile electronic device comprises a storage battery, a mobile power supply, a USB interface, a current detection circuit and a detection module, wherein the mobile power supply is installed in the sound box, the mobile electronic device such as a mobile phone and a tablet personal computer can be charged emergently by arranging the USB interface, the current detection circuit is coupled with the storage battery, and in the charging process, the detection module of the current detection circuit detects the magnitude of charging current, so that the mobile electronic device is not prone to consume too much current of the sound box when.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: when the mobile electronic equipment is in urgent need of quick charging, the charging time of the mobile electronic equipment is prolonged due to the limitation of the detection module on the charging current; when the storage battery is charged externally, the detection module is not easy to switch the current-limiting state to meet the user requirement, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
In order to enable the storage battery of the sound box to be charged externally, the detection module can be switched to a current-limiting state to meet the requirements of users, and the application provides an external charging current detection circuit of the sound box and the sound box.
In a first aspect, the present application provides an external charging current detection circuit for a speaker. The following technical scheme is adopted:
the utility model provides an external charging current detection circuit of audio amplifier, includes and detects the module, it is used for cutting off or the infrared induction module of closed detection module power supply loop to detect module coupling, infrared induction module includes:
the infrared induction unit is arranged on the surface of the sound box and used for inducing whether the electronic equipment shields the infrared induction unit or not and sending an infrared induction signal;
the signal comparison unit is coupled with the infrared induction unit and is provided with a threshold signal so as to output an infrared comparison signal when the infrared induction signal is smaller than the threshold signal;
and the switch unit is coupled with the signal comparison unit and is connected in series in the power supply loop of the detection module so as to output a switch signal to cut off the power supply loop of the detection module when receiving the infrared comparison signal.
Through adopting above-mentioned technical scheme, when the user is not anxious when charging for mobile electronic device, mobile electronic device keeps away from infrared induction unit and places, and infrared induction signal that infrared induction unit was not sheltered from then sent is greater than threshold signal, and signal comparison unit does not send infrared comparison signal, and the switch unit does not switch on, and the detection module is in the current-limiting state. When a user is anxious to charge the mobile electronic equipment, the electronic mobile equipment is shielded by the infrared sensing unit on the surface of the sound box, so that the infrared sensing signal sent by the infrared sensing unit is smaller than a threshold signal, the switch unit sends a switch signal to turn off a power supply loop of the detection module, the detection module does not generate a current limiting effect on the external charging of the storage battery, the electronic mobile equipment of the user is charged quickly at the moment, and the function of switching the current limiting state of the detection module to meet the requirement of the user is realized.
Optionally, the infrared sensing module further includes a first prompting subunit and a second prompting subunit, the first prompting subunit is coupled to the switch unit, and the second prompting subunit is connected in series to the power supply loop of the detection module, so as to respectively send out a prompting signal to prompt the user to detect the current state of the module when the detection module is in the off state or the on state.
By adopting the technical scheme, the first prompt subunit and the second prompt subunit are arranged, and the two prompt signals are respectively sent out in the two states of power-on or power-off at the detection module by setting, so that a user can conveniently observe whether the external charging function of the sound box is in the current-limiting state at the moment.
Optionally, the infrared induction unit includes infrared transmitting tube D1 and infrared receiving tube D2, the positive pole of infrared transmitting tube D1 is coupled in mains voltage VCC after first resistance R1, infrared transmitting tube D1's negative pole ground connection, infrared receiving tube D2's positive pole ground connection, infrared receiving tube D2's negative pole is coupled in mains voltage VCC after second resistance R2, simultaneously, infrared receiving tube D2's negative pole is coupled in signal comparison unit.
By adopting the technical scheme, when infrared rays emitted by the infrared emitting tube D1 are blocked by the electronic mobile equipment and reflected to the infrared receiving tube D2 for receiving, the infrared receiving tube D2 is conducted, the infrared receiving tube D2 outputs low level to the comparison unit, and at the moment, the infrared sensing signal is small; when the infrared signal that infrared emission pipe D1 launched was not sheltered from, infrared receiver tube D2 failed to receive the infrared induction signal that infrared emission pipe D1 launched, then infrared receiver tube D2 is in reverse cut-off state, and infrared receiver tube D2 output high level to the comparing unit, and infrared induction signal grow this moment, and then realize the change of infrared induction signal size.
Optionally, the signal comparison module includes an operational amplifier IC1, a third pin of the operational amplifier IC1 is coupled to a cathode of the infrared receiving tube D2, a second pin of the operational amplifier IC1 is coupled to a sliding end of an adjustable resistor RP, and two fixed ends of the adjustable resistor RP are connected in parallel with the infrared receiving tube D2; the fourth pin of the operational amplifier IC1 is grounded, the eighth pin of the operational amplifier IC1 is coupled to the power supply voltage VCC, and the first pin of the operational amplifier IC1 is coupled to the switch unit through the third resistor R3.
By adopting the technical scheme, the infrared sensing signal sent by the infrared receiving tube D2 and received by the third pin of the operational amplifier IC1 is compared with the threshold signal accessed by the second pin, the threshold signal is debugged to be a reference voltage value by the adjustable resistor RP, when the voltage value at the third pin is smaller than the reference voltage, the first pin of the operational amplifier IC1 outputs a low level to the switch unit, the switch unit sends a switch signal to cut off the power supply loop of the detection module, and when the voltage value at the third pin is larger than the reference voltage value, the first pin of the operational amplifier IC1 outputs a high level signal to the switch unit; the switch unit does not send out a switch signal, so that the judgment of the size of the infrared sensing signal is realized, and the switching of the current limiting state of the detection module is further realized.
Optionally, the switch unit includes a transistor Q1 and a relay KM1, a base of the transistor Q1 is coupled to a first pin of the operational amplifier IC1, an emitter of the transistor Q1 is coupled to the power voltage VCC, a collector of the transistor Q1 is connected in series with a coil of the relay KM1 and then grounded, the relay KM1 includes a normally closed contact switch KM1-1, and the normally closed contact switch KM1 is connected in series in a power supply loop of the detection module.
By adopting the technical scheme, when the triode Q1 receives a comparison signal sent by the first pin of the operational amplifier IC1, the base electrode of the triode Q1 is converted from a high level to a low level, the triode Q1 is switched on, the coil of the relay KM1 is electrified, the normally closed outlet contact switch KM1-1 is switched off, and the detection module is powered off and removes the current limitation of the storage battery; when the base electrode of the triode Q1 does not receive the receiving comparison signal, the triode Q1 maintains high level, the normally closed contact switch LM1-1 is in a closed state, and the detection module is in a current limiting state, so that the switching function of controlling whether the detection module is in current limiting is realized.
Optionally, the first warning subunit includes a first warning light L1, the first warning light L1 is coupled to the ground after the emitter of the transistor Q1, and when the first warning light L1 is powered, the first warning light L1 sends a yellow warning signal.
By adopting the technical scheme, when the triode Q1 is switched on, the first prompt lamp L1 is powered to send out a yellow prompt signal. The detection module is not in the current limiting state at the moment, and the method is suitable for the situation that the user urgently needs to charge the electronic mobile equipment quickly.
Optionally, the second warning subunit includes a second warning light L2, the second warning light L2 is connected in series in the power supply loop of the detection module, and when the second warning light L2 is powered on, the second warning light L2 sends a green warning signal.
By adopting the technical scheme, when the triode Q1 is not conducted, the second prompt lamp L2 is in a power-on state and sends out a green prompt signal; so as to prompt the user that the detection module normally limits the current of the storage battery at the moment.
In a second aspect, the present application provides an acoustic enclosure. The following technical scheme is adopted:
a sound box comprises the sound box external charging current detection circuit.
Through adopting above-mentioned technical scheme, the audio amplifier is through being provided with the external charging current detection circuit of audio amplifier, and when the user used this audio amplifier to charge to mobile electronic equipment, through the external charging current detection circuit with mobile electronic equipment response audio amplifier, whether the realization was listened the module and is given mobile electronic equipment state switching of charging the current-limiting to the battery, satisfied the user to the demand of charging of electron mobile equipment.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the electronic mobile equipment is shielded by the infrared sensing unit on the surface of the sound box, so that an infrared sensing signal sent by the infrared sensing unit is smaller than a threshold signal, the switch unit sends a switch signal to turn off a power supply loop of the detection module, the detection module does not charge the storage battery to the outside to generate a current limiting effect, the electronic mobile equipment of a user is charged quickly, and the current limiting state of the detection module is switched to meet the requirement of the user;
2. the first prompting subunit and the second prompting subunit are arranged, and two prompting signals are respectively sent out when the detection module is in an on state or an off state, so that a user can conveniently observe whether the external charging function of the sound box is in a current limiting state;
3. the loudspeaker box is provided with the loudspeaker box external charging current detection circuit, when a user charges the mobile electronic equipment by using the loudspeaker box, the mobile electronic equipment is induced by the loudspeaker box external charging current detection circuit, whether the state switching of the storage battery for charging and current limiting of the mobile electronic equipment is achieved by the detection module, and the charging requirement of the user on the electronic mobile equipment is met.
Drawings
Fig. 1 is a circuit diagram of an infrared sensing module in the present embodiment;
fig. 2 is a schematic structural diagram of a sound box in this embodiment.
Description of reference numerals: 1. an infrared sensing unit; 2. a signal comparison unit; 3. a switch unit; 41. A first prompt subunit; 42. and a second prompting subunit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-2 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses a circuit for detecting external charging current of a sound box. Referring to fig. 1, the external charging current detection circuit of the sound box includes a detection module, the detection module is coupled with an infrared sensing module for cutting off or closing a power supply loop of the detection module, and the infrared sensing module includes an infrared sensing unit 1, a signal comparison unit 2, a switch unit 3, a first prompt subunit 41 and a second prompt subunit 42.
The infrared induction unit 1 is arranged on the surface of the sound box and used for inducing whether the electronic equipment shields the infrared induction unit 1 or not and sending an infrared induction signal; the infrared sensing unit 1 comprises an infrared transmitting tube D1 and an infrared receiving tube D2, the anode of the infrared transmitting tube D1 is coupled to the power supply voltage VCC after passing through a first resistor R1, the cathode of the infrared transmitting tube D1 is grounded, the anode of the infrared receiving tube D2 is grounded, the cathode of the infrared receiving tube D2 is coupled to the power supply voltage VCC after passing through a second resistor R2, meanwhile, the cathode of the infrared receiving tube D2 is coupled to the signal comparing unit 2, the infrared transmitting tube D1 is connected with a first capacitor C1 in parallel, and the infrared receiving tube D2 is connected with a second capacitor C2 in parallel.
The signal comparison unit 2 is coupled to the infrared sensing unit 1 and is provided with a threshold signal so as to output an infrared comparison signal when the infrared sensing signal is smaller than the threshold signal; the signal comparison module comprises an operational amplifier IC1, a third pin of the operational amplifier IC1 is coupled to the cathode of the infrared receiving tube D2, a second pin of the operational amplifier IC1 is coupled to the sliding end of the adjustable resistor RP, and two fixed ends of the adjustable resistor RP are connected with the infrared receiving tube D2 in parallel; the fourth pin of the operational amplifier IC1 is grounded, the eighth pin of the operational amplifier IC1 is coupled to the power voltage VCC, and the first pin of the operational amplifier IC1 is coupled to the switch unit 3 through the third resistor R3.
The switch unit 3 is coupled to the signal comparison unit 2 and is connected in series in the power supply loop of the detection module so as to output a switch signal to cut off the power supply loop of the detection module when receiving the infrared comparison signal; the switch unit 3 comprises a PNP type triode Q1 and a relay KM1, a base of the triode Q1 is coupled to a first pin of the operational amplifier IC1, an emitter of the triode Q1 is coupled to the power voltage VCC, a collector of the triode Q1 is connected in series with a coil of the relay KM1 and then grounded, the relay KM1 comprises a normally closed contact switch KM1-1, and the normally closed contact switch KM1 is connected in series in a power supply loop of the detection module.
The first prompting subunit 41 is coupled to the switch unit 3, and the second prompting subunit 42 is connected in series to the power supply loop of the detection module, so as to respectively send out a prompting signal to prompt a user to detect the current state of the module when the detection module is in an off state or an on state; the first prompting subunit 41 includes a first prompting lamp L1, the first prompting lamp L1 is coupled to the emitter of the transistor Q1 and then grounded, the second prompting subunit 42 includes a second prompting lamp L2, and the second prompting lamp L2 is connected in series in the power supply loop of the detection module; when the first indicator light L1 is powered on, the first indicator light L1 sends out a yellow indicator signal, and when the second indicator light L2 is powered on, the second indicator light L2 sends out a green indicator signal.
The implementation principle of the external charging current detection circuit of the sound box in the embodiment of the application is as follows: when a user is not anxious to charge the mobile electronic device, the mobile electronic device is far away from the infrared transmitting tube D1 and the infrared receiving tube D2, an infrared signal transmitted by the infrared transmitting tube D1 is not shielded, the infrared receiving tube D2 is in a reverse cut-off state, the voltage at the third pin of the operational amplifier IC1 is greater than the reference voltage accessed by the second pin, the first pin of the operational amplifier IC1 sends out a high level, the triode Q1 is not conducted in a high level state, a power supply loop of the detection module is in a closed state, the second prompt lamp L2 sends out a green prompt signal, and the detection module is in a current-limiting state for external charging of the storage battery.
When a user is anxious to charge the mobile electronic equipment, the infrared receiving tube D2 receives an infrared signal by shielding the electronic mobile equipment from the infrared transmitting tube D1 on the surface of the sound box, the voltage at the third pin of the operational amplifier IC1 is smaller than a reference voltage value, the operational amplifier IC1 sends a low level signal, the triode Q1 is switched on, the normally closed contact switch KM1-1 is switched off, the detection module does not generate a current-limiting effect on the external charging of the storage battery, meanwhile, the first prompt lamp L1 sends a yellow prompt signal, the electronic mobile equipment of the user is charged quickly at the moment, and the current-limiting state of the detection module is switched to meet the requirement of the user.
The embodiment of the application discloses a sound box. Referring to fig. 2, a speaker includes a circuit for detecting an external charging current of the speaker.
The implementation principle of a sound box in the embodiment of the application is as follows: the loudspeaker box is provided with the loudspeaker box external charging current detection circuit, when a user charges the mobile electronic equipment by using the loudspeaker box, the mobile electronic equipment is induced by the loudspeaker box external charging current detection circuit, whether the state switching of the storage battery for charging and current limiting of the mobile electronic equipment is achieved by the detection module, and the charging requirement of the user on the electronic mobile equipment is met.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (8)
1. The utility model provides an external charging current detection circuit of audio amplifier, includes and detects the module, its characterized in that: the detection module is coupled with an infrared sensing module for cutting off or closing a power supply loop of the detection module, and the infrared sensing module comprises:
the infrared induction unit (1) is arranged on the surface of the sound box and used for inducing whether the electronic equipment shields the infrared induction unit (1) or not and sending an infrared induction signal;
the signal comparison unit (2) is coupled with the infrared induction unit (1) and is provided with a threshold signal so as to output an infrared comparison signal when the infrared induction signal is smaller than the threshold signal;
and the switch unit (3) is coupled with the signal comparison unit (2) and is connected in series in the power supply loop of the detection module so as to output a switch signal to cut off the power supply loop of the detection module when receiving the infrared comparison signal.
2. The circuit for detecting external charging current of sound box according to claim 1, wherein: the infrared sensing module further comprises a first prompting subunit (41) and a second prompting subunit (42), wherein the first prompting subunit (41) is coupled to the switch unit (3), and the second prompting subunit (42) is connected in series in a power supply loop of the detection module so as to respectively send out a prompting signal to prompt a user to detect the current state of the detection module when the detection module is in an off state or an on state.
3. The circuit for detecting external charging current of sound box according to claim 1, wherein: infrared induction unit (1) includes infrared emission pipe D1 and infrared receiver tube D2, coupling is in the mains voltage VCC behind first resistance R1 in infrared emission pipe D1's positive pole, infrared emission pipe D1's negative pole ground connection, infrared receiver tube D2's positive pole ground connection, infrared receiver tube D2's negative pole is coupled in the mains voltage VCC behind second resistance R2, simultaneously, infrared receiver tube D2's negative pole is coupled in signal comparison unit (2).
4. The circuit for detecting external charging current of a sound box according to claim 3, wherein: the signal comparison module comprises an operational amplifier IC1, a third pin of the operational amplifier IC1 is coupled to the cathode of the infrared receiving tube D2, a second pin of the operational amplifier IC1 is coupled to the sliding end of an adjustable resistor RP, and two fixed ends of the adjustable resistor RP are connected with the infrared receiving tube D2 in parallel; the fourth pin of the operational amplifier IC1 is grounded, the eighth pin of the operational amplifier IC1 is coupled to the power supply voltage VCC, and the first pin of the operational amplifier IC1 is coupled to the switch unit (3) through the third resistor R3.
5. The circuit for detecting external charging current of sound box according to claim 4, wherein: the switch unit (3) comprises a triode Q1 and a relay KM1, wherein the base of the triode Q1 is coupled to the first pin of the operational amplifier IC1, the emitter of the triode Q1 is coupled to the power voltage VCC, the collector of the triode Q1 is connected in series with the coil of the relay KM1 and then grounded, the relay KM1 comprises a normally closed contact switch KM1-1, and the normally closed contact switch KM1 is connected in series in the power supply loop of the detection module.
6. The circuit for detecting external charging current of sound box according to claim 2, wherein: the first prompting subunit (41) comprises a first prompting lamp L1, the first prompting lamp L1 is coupled to the rear of the emitter of the triode Q1 and then grounded, and when the first prompting lamp L1 is powered, the first prompting lamp L1 sends out a yellow prompting signal.
7. The circuit for detecting external charging current of sound box according to claim 2, wherein: the second prompting subunit (42) comprises a second prompting lamp L2, the second prompting lamp L2 is connected in series in a power supply loop of the detection module, and when the second prompting lamp L2 is powered on, the second prompting lamp L2 sends out a green prompting signal.
8. A sound box is characterized in that: the circuit for detecting the external charging current of the sound box according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022899217.4U CN214069619U (en) | 2020-12-04 | 2020-12-04 | External charging current detection circuit of sound box and sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022899217.4U CN214069619U (en) | 2020-12-04 | 2020-12-04 | External charging current detection circuit of sound box and sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214069619U true CN214069619U (en) | 2021-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022899217.4U Active CN214069619U (en) | 2020-12-04 | 2020-12-04 | External charging current detection circuit of sound box and sound box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214069619U (en) |
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2020
- 2020-12-04 CN CN202022899217.4U patent/CN214069619U/en active Active
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