CN214958741U - Bluetooth headset charging cabin and Bluetooth headset system - Google Patents
Bluetooth headset charging cabin and Bluetooth headset system Download PDFInfo
- Publication number
- CN214958741U CN214958741U CN202120258174.3U CN202120258174U CN214958741U CN 214958741 U CN214958741 U CN 214958741U CN 202120258174 U CN202120258174 U CN 202120258174U CN 214958741 U CN214958741 U CN 214958741U
- Authority
- CN
- China
- Prior art keywords
- charging
- voltage
- bluetooth headset
- circuit
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a bluetooth earphone charging cabin and bluetooth earphone system, the bluetooth earphone charging cabin comprises a voltage conversion circuit, a charging management circuit and a charging switching circuit, the voltage conversion circuit is used for converting the external charging voltage into the preset voltage and transmitting the preset voltage to the charging management circuit and the charging switching circuit, the first output end of the charging management circuit is connected with the second input end of the charging switching circuit, the second output end of the charging management circuit is used for providing the charging voltage for the battery of the charging cabin, the output end of the charging switching circuit is used for providing the charging voltage for the bluetooth earphone, when the external charging voltage is connected, the preset voltage output by the voltage conversion circuit charges the bluetooth earphone through the charging switching circuit, the preset voltage output by the voltage conversion circuit charges the battery of the charging cabin through the charging management circuit, the charging efficiency of the bluetooth earphone is improved, the user experience is improved.
Description
Technical Field
The utility model relates to a bluetooth headset technical field especially relates to a bluetooth headset charging cabin and bluetooth headset system.
Background
With the continuous advancement of technology, electronic products such as MP3 walkman, Personal Digital Assistant (PDA), notebook computer, etc. have no tendency to be miniaturized, and are not necessary for daily life. In any of the above electronic products, in order to allow the user to listen to the audio information provided by the electronic product without interfering with other people, the earphone has become a necessary accessory for each electronic product, and in addition, the earphone also provides better audio transmission for the listener, so that the listener can clearly hear and understand the audio content.
The conventional earphone is a near-ear type sound reproducing device which receives an electric signal from a media player or a receiver and converts the electric signal into audible sound waves by using a speaker near the ear. In order to meet the requirement of electronic equipment for conversation, the earphone integrates the microphone function, namely the traditional earphone. In order to be more convenient to use, the earphone is changed from the original wired earphone into the wireless earphone, and the Bluetooth earphone is a common wireless earphone.
Bluetooth headsets also typically include a charging bay associated therewith, which may charge the bluetooth headset when the headset is placed in the charging bay. However, in the existing scheme, when the battery voltage of the charging cabin is too low, the charging cabin cannot continue to charge the earphone, and even though the external charging voltage is connected to charge the charging cabin, the external charging voltage cannot directly charge the bluetooth earphone, and the charging cabin can charge the bluetooth earphone only after the voltage of the battery of the charging cabin reaches the preset value. This undoubtedly lowers the charging efficiency of the bluetooth headset, causing inconvenience to the user.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a bluetooth headset charging chamber and bluetooth headset system can be when charging for the charging chamber, for bluetooth headset charges, improves bluetooth headset's charge efficiency, improves user experience.
In a first aspect, the utility model provides a bluetooth headset charging cabin, which comprises a voltage conversion circuit, a charging management circuit and a charging switching circuit;
the input end of the voltage conversion circuit is used for accessing an external charging voltage, the output end of the voltage conversion circuit is respectively connected with the input end of the charging management circuit and the first input end of the charging switching circuit, and the voltage conversion circuit is used for converting the external charging voltage into a preset voltage and transmitting the preset voltage to the charging management circuit and the charging switching circuit;
the first output end of the charging management circuit is connected with the second input end of the charging switching circuit, and the second output end of the charging management circuit is used for providing charging voltage for a battery of the charging cabin;
the output end of the charging switching circuit is used for providing charging voltage for the Bluetooth headset;
when the external charging voltage is accessed, the preset voltage output by the voltage conversion circuit charges the Bluetooth headset through the charging switching circuit, and the preset voltage output by the voltage conversion circuit charges the battery of the charging cabin through the charging management circuit;
when the external charging voltage is not accessed, the charging management circuit is used for converting the voltage output by the battery of the charging cabin into the charging voltage required by the Bluetooth headset and charging the Bluetooth headset through the charging switching circuit.
Optionally, the charging switching circuit includes a first switching unit and a second switching unit;
the input end of the first switching unit is connected with the output end of the voltage conversion circuit, the output end of the first switching unit is used for providing charging voltage for the Bluetooth headset, and when the output end of the voltage conversion circuit has voltage output, the first switching unit is conducted to charge the Bluetooth headset;
the input end of the second switching unit is connected with the first output end of the charging management circuit, the output end of the second switching unit is used for providing charging voltage for the Bluetooth headset, when the output end of the voltage conversion circuit does not output voltage, the charging management circuit converts the voltage output by the battery of the charging cabin into the charging voltage required by the Bluetooth headset and transmits the charging voltage to the second switching unit, and the second switching unit is switched on and charges the Bluetooth headset.
Optionally, the first switching unit includes a first electronic switching tube, the second switching unit includes a second electronic switching tube, and the charging switching circuit further includes a third electronic switching tube;
the first end of the first electronic switching tube is connected with the output end of the voltage conversion circuit, the second end of the first electronic switching tube is used for providing charging voltage for the Bluetooth headset, and the control end of the first electronic switching tube is grounded;
the first end of the second electronic switching tube is connected with the first output end of the charging management circuit, the second end of the second electronic switching tube is used for providing charging voltage for the Bluetooth headset, and the control end of the second electronic switching tube is grounded;
the first end of the third electronic switch tube is connected with the first output end of the charging management circuit, the second end of the third electronic switch tube is connected with the control end of the first electronic switch tube, and the control end of the third electronic switch tube is grounded.
Optionally, the voltage conversion circuit comprises a Type-C interface and a voltage conversion chip, the Type-C interface is used for accessing external charging voltage, and a power input end of the voltage conversion chip is connected with an output end of the Type-C interface.
Optionally, the charging management circuit includes a charging management chip and a voltage boost unit;
the power supply input end of the charging management chip is connected with the output end of the voltage conversion circuit, the first output end of the charging management chip is connected with the second input end of the charging switching circuit, and the second output end of the charging management chip is connected with the output end of the boosting unit;
the input end of the boosting unit is connected with the excitation signal output end of the charging management chip, the output end of the boosting unit is used for providing charging voltage for the battery of the charging cabin, and the boosting unit is used for responding to the excitation signal output by the charging management chip to boost the output voltage of the second output end of the charging management chip so as to charge the battery of the charging cabin.
Optionally, the boost unit includes a first resistor, a first capacitor, a second capacitor, and an inductor;
the first end of the first resistor is connected with the excitation signal output end of the charging management chip, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is grounded;
the first end of the inductor is connected with the excitation signal output end of the charging management chip, the second end of the inductor is respectively connected with the second output end of the charging management chip and the first end of the second capacitor, the second end of the second capacitor is grounded, and the second end of the inductor is used for providing charging voltage for a battery of the charging cabin.
Optionally, the electronic device further comprises a main control circuit, wherein the main control circuit comprises a main control chip, a first indicator light, a second indicator light and a third indicator light;
the power supply input end of the main control chip is connected with the second output end of the charging management chip;
the positive pole of first pilot lamp, second pilot lamp and third pilot lamp with the second output of charge management chip is connected, the negative pole of first pilot lamp, second pilot lamp and third pilot lamp respectively with the pilot lamp signal input part that corresponds on the main control chip is connected, first pilot lamp, second pilot lamp and third pilot lamp are used for instructing respectively the charged state of cabin, left earphone, right earphone charges.
Optionally, the bluetooth headset charging cabin further comprises a charging detection circuit, an input end of the charging detection circuit is used for collecting charging current of the bluetooth headset in a charging process and transmitting the charging current to a detection current input end of the main control chip, and the main control chip controls display states of the second indicator light and the third indicator light according to the size of the charging current.
Optionally, the detection circuit includes a bidirectional transient suppression diode, a second resistor, a third resistor, and a third capacitor;
the first end of the bidirectional transient suppression diode is connected with the Bluetooth headset, and the second end of the bidirectional transient suppression diode is grounded;
the first end of the second resistor is connected with the first end of the bidirectional transient suppression diode, and the second end of the second resistor is grounded;
the first end of the third resistor is connected with the first end of the second resistor, and the second end of the third resistor is connected with the detection current input end of the main control chip;
and the first end of the third capacitor is connected with the second end of the third resistor, and the second end of the third capacitor is grounded.
In a second aspect, the embodiment of the present invention further provides a bluetooth headset system, including if the utility model discloses the bluetooth headset charging cabin that the first aspect provided still includes bluetooth headset, the charging cabin is used for holding bluetooth headset works as bluetooth headset is located when charging the cabin, the charging cabin does bluetooth headset charges.
The embodiment of the utility model provides a bluetooth headset charging cabin, including voltage conversion circuit, charging management circuit and charging switching circuit, the input of voltage conversion circuit is used for inserting the external charging voltage, the output of voltage conversion circuit is connected with the input of charging management circuit and the first input of charging switching circuit respectively, voltage conversion circuit is used for converting the external charging voltage into the preset voltage and conveying to charging management circuit and charging switching circuit, the first output of charging management circuit is connected with the second input of charging switching circuit, the second output of charging management circuit is used for providing the charging voltage for the battery of charging cabin, the output of charging switching circuit is used for providing the charging voltage for bluetooth headset, when inserting the external charging voltage, the preset voltage output by voltage conversion circuit charges bluetooth headset through charging switching circuit, the preset voltage output by the voltage conversion circuit is used for charging the battery of the charging cabin through the charging management circuit, and when the external charging voltage is not accessed, the charging management circuit is used for converting the voltage output by the battery of the charging cabin into the charging voltage required by the Bluetooth headset and charging the Bluetooth headset through the charging switching circuit. The embodiment of the utility model provides an in, when charging for bluetooth ear cabin, can charge for bluetooth headset simultaneously, improved bluetooth headset's charge efficiency, improved user experience.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of a charging cabin of a bluetooth headset according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a voltage converting circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a charging management circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a charging switching circuit according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a main control circuit according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a charging detection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
The embodiment of the utility model provides a bluetooth headset charging cabin, fig. 1 does the utility model provides a pair of bluetooth headset charging cabin's structural schematic diagram, as shown in fig. 1, this bluetooth headset charging cabin includes voltage conversion circuit 110, charge management circuit 120 and charging switching circuit 130.
The input end of the voltage conversion circuit 110 is used for accessing an external charging voltage, and the output end of the voltage conversion circuit 110 is respectively connected with the input end of the charging management circuit 120 and the first input end of the charging switching circuit 130. For example, the external charging voltage may be a voltage converted by a charging head, such as a mains supply, via the charging head and a data line (e.g., a type-C data line or a data line). The voltage conversion circuit 110 is used to convert the external charging voltage into a preset voltage, and transmit the preset voltage to the charging management circuit 120 and the charging switching circuit 130.
A first output terminal of the charging management circuit 120 is connected to a second input terminal of the charging switching circuit 130, and a second output terminal of the charging management circuit 120 is used for providing a charging Voltage (VBAT) for a Battery (Battery) of the charging chamber.
The output of the charging switching circuit 130 is used to provide a charging voltage to the bluetooth headset.
Specifically, the utility model discloses bluetooth headset charging cabin's theory of operation as follows:
when an external charging voltage is applied (i.e. the external charging voltage is used for charging the bluetooth headset), the preset voltage output by the voltage conversion circuit 110 charges the bluetooth headset through the charging switching circuit 130, and the preset voltage output by the voltage conversion circuit 110 charges the battery of the charging chamber through the charging management circuit 120.
When the external charging voltage is not accessed, the battery of the charging chamber outputs voltage, and the charging management circuit 120 is configured to convert the voltage output by the battery of the charging chamber into the charging voltage required by the bluetooth headset, and charge the bluetooth headset through the charging switching circuit 130.
The embodiment of the utility model provides a bluetooth headset charging cabin, including voltage conversion circuit, charging management circuit and charging switching circuit, the input of voltage conversion circuit is used for inserting the external charging voltage, the output of voltage conversion circuit is connected with the input of charging management circuit and the first input of charging switching circuit respectively, voltage conversion circuit is used for converting the external charging voltage into the preset voltage and conveying to charging management circuit and charging switching circuit, the first output of charging management circuit is connected with the second input of charging switching circuit, the second output of charging management circuit is used for providing the charging voltage for the battery of charging cabin, the output of charging switching circuit is used for providing the charging voltage for bluetooth headset, when inserting the external charging voltage, the preset voltage output by voltage conversion circuit charges bluetooth headset through charging switching circuit, the preset voltage output by the voltage conversion circuit is used for charging the battery of the charging cabin through the charging management circuit, and when the external charging voltage is not accessed, the charging management circuit is used for converting the voltage output by the battery of the charging cabin into the charging voltage required by the Bluetooth headset and charging the Bluetooth headset through the charging switching circuit. The embodiment of the utility model provides an in, when charging for bluetooth ear cabin, can charge for bluetooth headset simultaneously, improved bluetooth headset's charge efficiency, improved user experience.
Fig. 2 is a circuit diagram of a voltage conversion circuit according to an embodiment of the present invention, as shown in fig. 2, on the basis of the foregoing embodiment, the voltage conversion circuit 110 includes a Type-C interface and a voltage conversion chip U1, and a model of the voltage conversion chip U1 may be P14C 5N. The Type-C interface is used for accessing external charging voltage, and a power supply input end (No. 1 port, IN) of the voltage conversion chip U1 is connected with an output end (No. 2 port, VBUS) of the Type-C interface. The Type-C interface converts the mains supply into a voltage VBUS and transmits the voltage VBUS to a power input end of a voltage conversion chip U1.
The voltage conversion chip U1 converts the input voltage VBUS into a preset voltage, illustratively, 5V, through an internal conversion circuit, and outputs the preset voltage, that is, 5Vin, from an output terminal (port No. 8, OUT) of the voltage conversion chip U1.
For example, as shown in fig. 2, in the embodiment of the present invention, a bidirectional transient suppression diode D1 and a capacitor C1 are further disposed between the Type-C interface and the voltage conversion chip U1, when two poles of the bidirectional transient suppression diode D1 are subjected to reverse transient high energy impact, the high impedance between the two poles can be changed into low impedance at a speed of 10 on the order of minus 12 th power second, surge power up to thousands of watts can be absorbed, the voltage clamp between the two poles is located at a predetermined value, and precision components in an electronic circuit are effectively protected from being damaged by various surge pulses. The capacitor C1 acts as a filter.
For example, as shown in fig. 2, in the embodiment of the present invention, the voltage conversion chip U1 may also function as an overvoltage protection and an overcurrent protection. Specifically, the voltage conversion circuit further includes a resistor R3, a resistor R4, a resistor R5, and a resistor R6, wherein a first end of the resistor R3 is connected to the output end of the voltage conversion chip U1, a second end of the resistor R3 is connected to a first end of the resistor R4, and a second end of the resistor R4 is connected to an overvoltage protection port (port No. 3, OVLO) of the voltage conversion chip U1. The first end of the resistor R5 is connected to the second end of the resistor R4, and the second end of the resistor R5 is grounded. A first end of the resistor R6 is grounded, and a second end of the resistor R6 is connected to an overcurrent protection port (pin No. 4, ILIM) of the voltage conversion chip U1.
Specifically, the resistor R3 is used to collect the voltage at the output end of the voltage conversion chip U1, and when the voltage at the output end of the voltage conversion chip U1 is greater than the voltage threshold, the voltage at the overvoltage protection port of the voltage conversion chip U1 (i.e., the voltage at the two ends of the resistor R5) is greater than the protection voltage, and at this time, the voltage conversion chip U1 adjusts the output voltage through the internal adjustment circuit until the output voltage is lower than the voltage threshold. In addition, the resistor R3 is used to collect the current at the output terminal of the voltage conversion chip U1, and when the current at the output terminal of the voltage conversion chip U1 is greater than the current threshold, the current at the overcurrent protection port of the voltage conversion chip U1 is greater than the protection current, and at this time, the voltage conversion chip U1 adjusts the magnitude of the output current through the internal adjustment circuit until the output current is lower than the current threshold.
Fig. 3 is a circuit diagram of a charging management circuit according to an embodiment of the present invention, as shown in fig. 3, on the basis of the foregoing embodiment, the charging management circuit 120 includes a charging management chip U2 and a BOOST unit BOOST. For example, the model of the charging management chip U2 may be LP 7801.
The power input terminal (port No. 2, Vin) of the charging management chip U2 is connected to the output terminal of the voltage conversion circuit 110 (i.e., the OUT port of the voltage conversion chip U1), the first output terminal (port No. 5, Vout) of the charging management chip U2 is connected to the second input terminal of the charging switching circuit 130, and the second output terminal (port No. 3, BAT) of the charging management chip U2 is connected to the output terminal of the BOOST unit BOOST.
When external charging voltage is connected, the voltage 5Vin output by the voltage conversion chip U1 is directly charged for the Bluetooth headset through the charging switching circuit, and meanwhile, the BOOST unit BOOST BOOSTs the VBAT output by the charging management chip U2 and charges the charging cabin.
For example, in the embodiment of the present invention, as shown in fig. 3, the charging management circuit 120 further includes capacitors C5 and C6, the first ends of the capacitors C5 and C6 are both connected to the first output end of the charging management chip U2, the second ends of the capacitors C5 and C6 are both grounded, and the capacitors C5 and C6 play a role of voltage stabilization and filtering.
The input end of the BOOST unit BOOST is connected with the excitation signal output end (port No. 4, SW) of the charging management chip U2, and the output end of the BOOST unit BOOST is used for providing charging voltage for the battery of the charging cabin. Specifically, when the external charging voltage is switched on, the BOOST unit BOOST is used for boosting the output voltage of the second output terminal of the charging management chip U1 in response to the excitation signal output by the charging management chip U2, so as to charge the battery of the charging cabin.
For example, as shown in fig. 3, the BOOST unit BOOST includes a first resistor R8, a first capacitor C4, a second capacitor C3, and an inductor L1. Specifically, a first end of the first resistor R8 is connected to the excitation signal output end of the charge management chip U2, a second end of the first resistor R8 is connected to a first end of the first capacitor C4, and a second end of the first capacitor C4 is grounded. A first end of the inductor L1 is connected to the excitation signal output end of the charging management chip U2, a second end of the inductor L2 is connected to the second output end of the charging management chip U2 and the first end of the second capacitor C3, respectively, a second end of the second capacitor C3 is grounded, and a second end of the inductor L1 is used for providing a charging voltage to the battery of the charging cabin. The first resistor R8, the first capacitor C4, the second capacitor C3 and the inductor L1 form a BOOST circuit, and the excitation signal output end of the charging management chip U2 outputs a periodic excitation signal. In the first half cycle of the excitation signal, VBAT flows through inductor L1, and since the input is dc, the current in inductor L1 increases linearly at a rate that is related to the size of inductor L1. As the inductor L1 current increases, some energy is stored in the inductor L1. In the second half of the excitation signal, the current flowing through the inductor L1 does not immediately become 0 due to the current holding characteristic of the inductor L1, but slowly becomes 0 from the time of completion of charging. Then, the inductor L1 starts to charge the second capacitor C3, and the voltage across the second capacitor C3 rises, and at this time, the voltage is already higher than the input voltage, and the voltage boosting is completed.
On the basis of the above-described embodiment, the charge switching circuit 130 includes the first switching unit and the second switching unit.
The input end of the first switching unit is connected to the output end of the voltage converting circuit 110 (i.e. the OUT port of the voltage converting chip U1), the output end of the first switching unit is used to provide a charging voltage to the bluetooth headset, and when there is a voltage output at the output end of the voltage converting circuit 110, the first switching unit is turned on to charge the bluetooth headset.
The input end of the second switching unit is connected to the first output end of the charging management circuit 120 (i.e. the Vout port of the charging management chip U2), the output end of the second switching unit is used to provide charging voltage for the bluetooth headset, when there is no voltage output at the output end of the voltage conversion circuit 110, the charging management circuit 120 converts the voltage output by the battery in the charging cabin into the charging voltage required by the bluetooth headset and transmits the charging voltage to the second switching unit, and the second switching unit is turned on to charge the bluetooth headset.
Fig. 4 is a circuit diagram of a charging switching circuit according to an embodiment of the present invention, for example, as shown in fig. 4, the first switching unit includes a first electronic switch Q1, the second switching unit includes a second electronic switch Q3, and the charging switching circuit further includes a third electronic switch Q2.
A first terminal of the first electronic switch Q1 is connected to an output terminal of the voltage converting circuit 120 (i.e., an OUT port of the voltage converting chip U1) through a current limiting resistor R31, a second terminal of the first electronic switch Q1 provides a charging voltage to a left earphone through the charging probes P1 and P2, a charging voltage to a right earphone through the charging probes P3 and P4, and a control terminal of the first electronic switch Q1 is grounded through a current limiting resistor R36.
A first terminal of the second electronic switch Q3 is connected to a first output terminal of the charge management circuit 130 (i.e., the Vout port of the charge management chip U2), a second terminal of the second electronic switch Q3 provides a charging voltage to the left earphone through the charge probes P1 and P2, a charging voltage to the right earphone through the charge probes P3 and P4, and a control terminal of the second electronic switch Q3 is grounded through the current limiting resistor R33. In the embodiment of the present invention, the control terminal of the second electronic switching tube Q3 is further connected to the second terminal of the current limiting resistor R31 through a resistor R32.
A first terminal of the third electronic switching tube Q2 is connected to the first output terminal of the charge management circuit 130 (i.e., the Vout port of the charge management chip U2) through a current-limiting resistor R34, a second terminal of the third electronic switching tube Q2 is connected to the control terminal of the first electronic switching tube Q1, and the control terminal of the third electronic switching tube Q2 is grounded through a current-limiting resistor R37. In the embodiment of the present invention, the control terminal of the third electronic switching tube Q2 is further connected to the second terminal of the current limiting resistor R31 through a resistor R35.
Specifically, when the external charging voltage is connected, the 5Vin voltage output from the OUT port of the voltage conversion chip U1 passes through the current-limiting resistor R31, so that the first electronic switch Q1 is turned on, meanwhile, the 5Vin voltage passes through the resistors R31 and R32, so that the control terminal of the second electronic switch Q3 maintains a high level, the 5Vin voltage passes through the resistors R31 and R35, so that the control terminal of the third electronic switch Q2 maintains a high level, the second electronic switch Q3 and the third electronic switch Q2 maintain an off state, and the 5Vin voltage charges the bluetooth headset through the resistor R31 and the first electronic switch Q1. Meanwhile, the 5Vin voltage output by the OUT port of the voltage conversion chip U1 is output through the BAT port of the charge management chip U2, then is boosted through the BOOST unit, and is used for charging the battery of the charging cabin through the J1 and J2 ports.
When the external charging voltage is not received, the battery output voltage of the charging cabin is boosted to 5V through the BAT port of the charging management chip U2 by the internal circuit of the charging management chip U2, and is output to the second electronic switch tube Q3 and the third electronic switch tube Q2 through the Vout port of the charging management chip U2. At this time, no voltage is output from the OUT port of the voltage conversion chip U1, so the control terminals of the second electronic switch tube Q3 and the third electronic switch tube Q2 become low level, the second electronic switch tube Q3 and the third electronic switch tube Q2 are turned on, the control terminal of the first electronic switch tube Q1 becomes high level, the first electronic switch tube Q1 is turned off, and 5V OUT charges the bluetooth headset through the second electronic switch tube Q3.
In the above-mentioned embodiment, the electronic switch pipe can be triode, MOS pipe etc. and the embodiment of the utility model provides a do the injecing here.
The embodiment of the utility model provides an in, bluetooth headset charging cabin can also include master control circuit, and fig. 5 is the utility model provides a master control circuit's circuit diagram, as shown in fig. 5, master control circuit includes master control chip U3, first pilot lamp LED1, second pilot lamp LED2 and third pilot lamp LED 3. The model of the main control chip U3 may be MC35P7040A0J, and the first indicator light LED1, the second indicator light LED2 and the third indicator light LED3 may be LED lamp beads.
The power input end (port 1, VDD) of the main control chip U3 is connected to the second output end (port 3, BAT) of the charging management chip U2. Anodes of the first indicator light LED1, the second indicator light LED2 and the third indicator light LED3 are connected with a BAT port of the charging management chip U2, cathodes of the first indicator light LED1, the second indicator light LED2 and the third indicator light LED3 are respectively connected with corresponding indicator light signal input ends on the main control chip U3 through current-limiting resistors R20, R25 and R27, and the first indicator light LED1, the second indicator light LED2 and the third indicator light LED3 are respectively used for indicating charging states of the charging cabin, the left earphone and the right earphone.
Specifically, when external charging voltage is connected, the charging cabin and the bluetooth headset are charged simultaneously, and the first indicator light LED1, the second indicator light LED2 and the third indicator light LED3 all flash to indicate that the charging cabin and the two bluetooth headsets are in a charging state.
The embodiment of the utility model provides an in, bluetooth headset charging cabin can also include the detection circuitry that charges, and the input of detection circuitry that charges is used for gathering the charging current of bluetooth headset in the charging process to the detection current input of main control chip is given in the transmission, and main control chip controls the display state of second pilot lamp and third pilot lamp according to charging current's size.
Specifically, when two bluetooth headsets are full of, the charging current that main control chip's detection current input received becomes zero or very little to control second pilot lamp and third pilot lamp change state, for example become normally bright by the scintillation, indicate that two bluetooth headsets have been full of.
Fig. 6 is a circuit diagram of a charging detection circuit that the embodiment of the utility model provides, as shown in fig. 6, charging detection circuit includes left earphone charging detection circuit and right earphone charging detection circuit, and left earphone charging detection circuit and right earphone charging detection circuit's structure is the same with the principle, explains here with one of them earphone charging detection circuit as the example, and the charging detection circuit of another earphone is only shown in the figure, and the principle is no longer repeated here.
The detection circuit comprises a bidirectional transient suppression diode D5, a second resistor R40, a third resistor R39 and a third capacitor C10. A first terminal of the bi-directional transient suppression diode D5 is connected to the bluetooth headset (in this embodiment to the charging probe P4), and a second terminal of the bi-directional transient suppression diode D5 is connected to ground. A first terminal of the second resistor R40 is connected to a first terminal of the bi-directional transient suppression diode D3, and a second terminal of the second resistor R40 is connected to ground. The first end of the third resistor R39 is connected to the first end of the second resistor R40, and the second end of the third resistor R39 is connected to the detection current input terminal (port No. 12) of the main control chip U3. A first terminal of the third capacitor C10 is connected to the second terminal of the third resistor R39, and a second terminal of the third capacitor C10 is grounded.
The utility model also provides a bluetooth headset system, include if the utility model discloses the cabin that charges that aforementioned arbitrary embodiment provided still includes bluetooth headset, and the cabin that charges is used for holding bluetooth headset, and charges and be provided with the charging probe who is used for charging for bluetooth headset in the cabin, is provided with the contact that charges that matches with the charging probe on the bluetooth headset, when bluetooth headset arranges the cabin that charges in, the last contact that charges and the charging probe in the cabin that charges of bluetooth headset electrically contact, and the realization cabin that charges is bluetooth headset charges.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in a descriptive sense and with reference to the illustrated orientation or positional relationship for purposes of descriptive convenience and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. 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 (10)
1. A Bluetooth headset charging cabin is characterized by comprising a voltage conversion circuit, a charging management circuit and a charging switching circuit;
the input end of the voltage conversion circuit is used for accessing an external charging voltage, the output end of the voltage conversion circuit is respectively connected with the input end of the charging management circuit and the first input end of the charging switching circuit, and the voltage conversion circuit is used for converting the external charging voltage into a preset voltage and transmitting the preset voltage to the charging management circuit and the charging switching circuit;
the first output end of the charging management circuit is connected with the second input end of the charging switching circuit, and the second output end of the charging management circuit is used for providing charging voltage for a battery of the charging cabin;
the output end of the charging switching circuit is used for providing charging voltage for the Bluetooth headset;
when the external charging voltage is accessed, the preset voltage output by the voltage conversion circuit charges the Bluetooth headset through the charging switching circuit, and the preset voltage output by the voltage conversion circuit charges the battery of the charging cabin through the charging management circuit;
when the external charging voltage is not accessed, the charging management circuit is used for converting the voltage output by the battery of the charging cabin into the charging voltage required by the Bluetooth headset and charging the Bluetooth headset through the charging switching circuit.
2. The bluetooth headset charging bay of claim 1, wherein the charging switching circuit comprises a first switching unit and a second switching unit;
the input end of the first switching unit is connected with the output end of the voltage conversion circuit, the output end of the first switching unit is used for providing charging voltage for the Bluetooth headset, and when the output end of the voltage conversion circuit has voltage output, the first switching unit is conducted to charge the Bluetooth headset;
the input end of the second switching unit is connected with the first output end of the charging management circuit, the output end of the second switching unit is used for providing charging voltage for the Bluetooth headset, when the output end of the voltage conversion circuit does not output voltage, the charging management circuit converts the voltage output by the battery of the charging cabin into the charging voltage required by the Bluetooth headset and transmits the charging voltage to the second switching unit, and the second switching unit is switched on and charges the Bluetooth headset.
3. The bluetooth headset charging bay of claim 2, wherein the first switching unit comprises a first electronic switching tube, the second switching unit comprises a second electronic switching tube, and the charging switching circuit further comprises a third electronic switching tube;
the first end of the first electronic switching tube is connected with the output end of the voltage conversion circuit, the second end of the first electronic switching tube is used for providing charging voltage for the Bluetooth headset, and the control end of the first electronic switching tube is grounded;
the first end of the second electronic switching tube is connected with the first output end of the charging management circuit, the second end of the second electronic switching tube is used for providing charging voltage for the Bluetooth headset, and the control end of the second electronic switching tube is grounded;
the first end of the third electronic switch tube is connected with the first output end of the charging management circuit, the second end of the third electronic switch tube is connected with the control end of the first electronic switch tube, and the control end of the third electronic switch tube is grounded.
4. The bluetooth headset charging cabin of any one of claims 1-3, wherein the voltage conversion circuit comprises a Type-C interface and a voltage conversion chip, the Type-C interface is used for accessing an external charging voltage, and a power input end of the voltage conversion chip is connected with an output end of the Type-C interface.
5. The bluetooth headset charging cabin according to any one of claims 1-3, wherein the charging management circuit comprises a charging management chip and a boosting unit;
the power supply input end of the charging management chip is connected with the output end of the voltage conversion circuit, the first output end of the charging management chip is connected with the second input end of the charging switching circuit, and the second output end of the charging management chip is connected with the output end of the boosting unit;
the input end of the boosting unit is connected with the excitation signal output end of the charging management chip, the output end of the boosting unit is used for providing charging voltage for the battery of the charging cabin, and the boosting unit is used for responding to the excitation signal output by the charging management chip to boost the output voltage of the second output end of the charging management chip so as to charge the battery of the charging cabin.
6. The bluetooth headset charging bay of claim 5, wherein the boost unit comprises a first resistor, a first capacitor, a second capacitor, and an inductor;
the first end of the first resistor is connected with the excitation signal output end of the charging management chip, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is grounded;
the first end of the inductor is connected with the excitation signal output end of the charging management chip, the second end of the inductor is respectively connected with the second output end of the charging management chip and the first end of the second capacitor, the second end of the second capacitor is grounded, and the second end of the inductor is used for providing charging voltage for a battery of the charging cabin.
7. The bluetooth headset charging bay of claim 5, further comprising a master control circuit, the master control circuit comprising a master control chip, a first indicator light, a second indicator light, and a third indicator light;
the power supply input end of the main control chip is connected with the second output end of the charging management chip;
the positive pole of first pilot lamp, second pilot lamp and third pilot lamp with the second output of charge management chip is connected, the negative pole of first pilot lamp, second pilot lamp and third pilot lamp respectively with the pilot lamp signal input part that corresponds on the main control chip is connected, first pilot lamp, second pilot lamp and third pilot lamp are used for instructing respectively the charged state of cabin, left earphone, right earphone charges.
8. The bluetooth headset charging cabin of claim 7, further comprising a charging detection circuit, wherein an input end of the charging detection circuit is used for collecting a charging current of the bluetooth headset during charging and transmitting the charging current to a detection current input end of the main control chip, and the main control chip controls display states of the second indicator light and the third indicator light according to the charging current.
9. The bluetooth headset charging bay of claim 8, wherein the detection circuit comprises a bidirectional transient suppression diode, a second resistor, a third resistor, and a third capacitor;
the first end of the bidirectional transient suppression diode is connected with the Bluetooth headset, and the second end of the bidirectional transient suppression diode is grounded;
the first end of the second resistor is connected with the first end of the bidirectional transient suppression diode, and the second end of the second resistor is grounded;
the first end of the third resistor is connected with the first end of the second resistor, and the second end of the third resistor is connected with the detection current input end of the main control chip;
and the first end of the third capacitor is connected with the second end of the third resistor, and the second end of the third capacitor is grounded.
10. A bluetooth headset system, comprising the bluetooth headset charging bay according to any one of claims 1 to 9, and further comprising a bluetooth headset, wherein the charging bay is configured to receive the bluetooth headset, and wherein the charging bay charges the bluetooth headset when the bluetooth headset is located in the charging bay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120258174.3U CN214958741U (en) | 2021-01-29 | 2021-01-29 | Bluetooth headset charging cabin and Bluetooth headset system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120258174.3U CN214958741U (en) | 2021-01-29 | 2021-01-29 | Bluetooth headset charging cabin and Bluetooth headset system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214958741U true CN214958741U (en) | 2021-11-30 |
Family
ID=79099607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120258174.3U Active CN214958741U (en) | 2021-01-29 | 2021-01-29 | Bluetooth headset charging cabin and Bluetooth headset system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214958741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337211A (en) * | 2022-03-08 | 2022-04-12 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
-
2021
- 2021-01-29 CN CN202120258174.3U patent/CN214958741U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337211A (en) * | 2022-03-08 | 2022-04-12 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202797874U (en) | Over-voltage protection circuit and mobile terminal | |
| CN211266506U (en) | Control circuit | |
| CN104218539A (en) | Charging circuit and charging method capable of preventing reverse connection of rechargeable power supply | |
| CN103607676B (en) | A kind of wire-controlled apparatus for earphone and earphone | |
| CN101610439B (en) | Electronic device | |
| CN113009995B (en) | Power supply device and power supply method | |
| EP2722939A1 (en) | Audio signal receiving and transferring device | |
| WO2012171494A1 (en) | Audio signal transfer device | |
| CN214958741U (en) | Bluetooth headset charging cabin and Bluetooth headset system | |
| CN202334893U (en) | Test device of hearing aid | |
| CN210246374U (en) | Charging base for communicating with Bluetooth headset | |
| CN112492448A (en) | Sleep earphone | |
| WO2017197749A1 (en) | Power taking method, noise reduction earphone, and playback device | |
| CN203632848U (en) | Handheld electronic device | |
| CN203608335U (en) | Drive-by-wire device used for earphones and earphones | |
| US20190086893A1 (en) | Mobile power supply and voice prompting system and method thereof | |
| CN214960052U (en) | Bluetooth headset charging cabin and Bluetooth headset kit | |
| CN213754015U (en) | Charging circuit, charging box and charging system of bluetooth headset | |
| CN203434657U (en) | Active hand microphone and mobile terminal configured with same | |
| CN214256586U (en) | Bluetooth headset with infrared remote control function and system | |
| CN209002167U (en) | A kind of novel line control earphone | |
| CN201114005Y (en) | Mobile phone possessing convenient charging equipment | |
| CN206743531U (en) | A kind of earphone that loudspeaker can be switched to microphone | |
| CN204761070U (en) | Battery power display device | |
| CN206136255U (en) | Built -in power supply's bluetooth speaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |