CN211017626U - Earphone charging data line with switching function - Google Patents
Earphone charging data line with switching function Download PDFInfo
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- CN211017626U CN211017626U CN201922076688.2U CN201922076688U CN211017626U CN 211017626 U CN211017626 U CN 211017626U CN 201922076688 U CN201922076688 U CN 201922076688U CN 211017626 U CN211017626 U CN 211017626U
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Abstract
An object of the utility model is to provide a can enough carry out data transmission, can transmit the sound source signal again, can also charge earphone charging data line that has the switching function, include: a first connector having a first connector-side data terminal corresponding to a mobile phone-side data terminal in the mobile phone interface; a second connector having second connector-side data terminals corresponding to the interface-side data terminals in the data interface; the conversion chip is used for converting sound source signals of the mobile phone into driving signals for driving the sound production unit and is provided with a sound source signal input terminal and a driving signal output terminal; and the switching circuit is provided with a switching switch, wherein the switching switch is respectively connected with the sound source signal input terminal, the first joint side data terminal and the second joint side data terminal, and is used for enabling a user to switch the switching switch so as to enable the first joint side data terminal to be connected with the second joint side data terminal or enable the first joint side data terminal to be connected with the sound source signal input terminal.
Description
Technical Field
The utility model relates to an earphone charging data line with switch function.
Background
With the development of lightweight and thin mobile devices such as mobile phones, 3.5mm earphone interfaces are gradually eliminated from mobile phones on the market at present, and a sound source signal output function is introduced into the mobile phone interface, so that one interface of the mobile phone simultaneously bears three functions of sound source output, data transmission and charging. In order to enable the earphone to be applied to the mobile phone, the existing part of earphones are designed into a form of adapting to the interface of the mobile phone, and related circuits of sound source signals are added in the earphones; when the mobile phone interface is connected with the computer through the data line, the data transmission mode is automatically switched.
Because different functions share the same interface, the earphone cannot be used when the mobile phone is charged under normal conditions. In order to further facilitate the use, some multifunctional patch cords are also available on the market, one end of each patch cord is an interface matched with a mobile phone connector, the other end of each patch cord is provided with a 3.5mm earphone and two charging interfaces, and the patch cords can output sound source signals while being charged. In such a multifunctional patch cord, the charging interface usually has only a charging function, and cannot be used for data transmission. When a user needs to perform data transmission, the user needs to find another USB data line to connect to the computer, which causes inconvenience in use.
SUMMERY OF THE UTILITY MODEL
For solving the above problem, provide one kind and can enough carry out data transmission, can transmit sound source signal again, the earphone that has the switching function that can also charge charges data line that charges, the utility model discloses a following technical scheme:
the utility model provides an earphone charging data line with switch function, a serial communication port, include: the first connector is used for being connected with a mobile phone interface of a mobile phone and is provided with a first connector side data terminal corresponding to a mobile phone side data terminal in the mobile phone interface; the second connector is used for being connected with a power interface of a charging power supply when the mobile phone is charged or connected with a data interface of a computer when the mobile phone carries out data transmission, and is provided with a second connector side data terminal corresponding to an interface side data terminal in the data interface; the conversion chip is used for converting sound source signals of the mobile phone into driving signals for driving the sound production unit and is provided with a sound source signal input terminal and a driving signal output terminal; and a switching circuit having a first transmission circuit connecting the sound source signal input terminal with the first connector side data terminal, a second transmission circuit connecting the connector side data terminal with the first connector side data terminal, and a switch, wherein the switch is respectively connected with the sound source signal input terminal, the first connector side data terminal, and the second connector side data terminal, and is used for switching the connection relationship of the switch by a user so as to connect the first connector side data terminal with the second connector side data terminal or connect the first connector side data terminal with the sound source signal input terminal.
The utility model provides an earphone charging data line with switch function can also include: and the at least one sound generating unit is connected with the driving signal output terminal and used for receiving the driving signal.
The utility model provides an earphone charging data line with switch function can also include: the microphone, conversion chip still have microphone signal receiving terminal, and the microphone is connected with microphone signal receiving terminal.
The utility model provides an earphone charging data line with switch function can also include: and the earphone interface is connected with the driving signal output terminal and used for transmitting the driving signal to an external earphone. Further, the earphone charging data line with switching function may further include: the microphone is installed at the position of the earphone interface, the conversion chip is also provided with a microphone signal receiving terminal, and the microphone is connected with the microphone signal receiving terminal.
The utility model provides an earphone charging data line with switch function can also have such technical feature, wherein, change over switch has the stationary contact that is connected with first joint side data terminal and a pair of movable contact with this stationary contact complex at least, and one in a pair of movable contact is connected with sound source signal input terminal, and another connects the side data terminal with the second and is connected. Further, the earphone charging data line with switching function may further have a technical feature that the conversion chip further has an earphone detection terminal, the switch further has a fixed contact connected with the earphone detection terminal and a pair of movable contacts cooperating with the fixed contact, one of the pair of movable contacts is connected with the earphone detection terminal, and the other one is connected with a ground wire.
The utility model provides an earphone charging data line with switch function can also include: the power circuit comprises a first joint, a second joint and a conversion chip, wherein the first joint is also provided with a first joint side power supply terminal matched with a power supply terminal in the mobile phone interface, the second joint is also provided with a second joint side power supply terminal matched with the power supply terminal in the power interface or the data interface, the conversion chip is also provided with a chip side power supply terminal used for receiving power supply, the power circuit is provided with a plurality of power nodes respectively connected with the first joint side power supply terminal, the second joint side power supply terminal and the chip side power supply terminal, the power nodes are connected in parallel through MOSFET elements, so that when the first joint is connected with the mobile phone interface and the second joint side power supply terminal is not connected, current flows from the first joint side power supply terminal to the chip side power supply terminal, and when the second joint side power supply terminal is connected with the power.
Utility model with the functions and effects
According to the earphone charging data line with switching function provided by the utility model, as the switching circuit comprises a switch, the changeover switch is capable of switching the connection state under user operation so that the user can connect the first tab side data terminal with the second tab side data terminal, or let first joint side data terminal be connected with sound source signal input terminal, consequently, the utility model discloses an earphone charging data line with switching function can let the manual data connection state who switches the cell-phone of user, can also adopt conversion chip to sound production unit output drive signal according to user's demand when letting the cell-phone connect the computer, that is to say, the utility model discloses an earphone charging data line with switching function can carry out data transmission or let the user can be suitable for the earphone according to user's selection when realizing that the cell-phone charges.
Drawings
Fig. 1 is a configuration diagram of an earphone charging data line having a switching function according to an embodiment of the present invention;
FIG. 2 is a block diagram of a first joint according to an embodiment of the present invention;
FIG. 3 is a block diagram of a second joint according to an embodiment of the present invention;
fig. 4 is a circuit configuration diagram of a switching circuit according to an embodiment of the present invention;
fig. 5 is a circuit structure diagram of a power circuit according to an embodiment of the present invention.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings and examples.
< example >
Fig. 1 is a configuration diagram of an earphone charging data line having a switching function according to an embodiment of the present invention.
As shown in fig. 1, the earphone charging data line 100 with switching function according to the embodiment of the present invention is suitable for a type c interface mobile phone, and includes a first connector 10, a second connector 20, a conversion chip 30, a sound generating unit 40, a switching circuit 50, and a power circuit 60.
Fig. 2 is a structural diagram of a first joint according to an embodiment of the present invention.
As shown in fig. 1 and 2, the first connector 10 is a Type C connector for connecting to a Type C interface of a mobile phone. The Type C-Type mobile phone interface is generally provided with a mobile phone side data terminal for transmitting data signals including data signals when connecting a computer and sound source signals when playing music.
In this embodiment, a first connector-side data terminal 11 is disposed in the first connector 10, and the connector-side signal terminal 11 is used for being matched with a mobile phone-side data terminal to realize transmission of data signals or sound source signals. Specifically, as shown in fig. 2, the first joint-side data terminal 11 includes two kinds, i.e., a first joint-side data terminal 11A (D-terminal), a first joint-side data terminal 11B (D + terminal).
A first connector-side power terminal 12 (i.e., VBUS terminal) is further provided in the first connector 10, and is used for interfacing with a power terminal in a TypeC interface on the mobile phone side to realize power transmission.
The first connector 10 is a Type C connector, and the insertion direction is not distinguished during use, so that the first connector-side data terminal 11A and the first connector-side data terminal 11B are respectively provided with one pair, the first connector-side power supply terminal 12 is provided with two pairs, and the paired terminals are symmetrically distributed on both sides of the connector, so that when the first connector 10 is connected with a mobile phone, the accurate butt joint can be realized regardless of the insertion direction. For convenience of explanation, the lead wire led out from the first connector-side data terminal 11A is hereinafter referred to as TypeC-DM, the lead wire led out from the first connector-side data terminal 11B is referred to as TypeC-DP, and the lead wire led out from the first connector-side power supply terminal 12 is referred to as C-Vbus-a.
In addition, the first connector 10 of the embodiment further has a plurality of other terminals, such as a ground terminal GND, and the structure and the function of these terminals are the same as those of the Type C connector in the prior art, and are not described herein again.
Fig. 3 is a structural view of a second joint according to an embodiment of the present invention.
As shown in fig. 1 and 3, the second connector 20 is used to connect with a power source (e.g., a charger) interface of a charging power source when the mobile phone is charged, or connect with a data interface of a computer when data is transmitted.
In this embodiment, the second connector is a USB type connector, and accordingly, both the power interface and the data interface that can be connected to the second connector are USB type interfaces.
The second connector 20 includes a second connector-side data terminal 21 and a second connector-side power supply terminal 22.
The second connector-side data terminal 21 is matched with an interface-side data terminal in the computer USB interface, so that data transmission is realized when the second connector 20 is connected to a computer. Specifically, as shown in fig. 3, the second tab-side DATA terminal 21 includes two kinds, respectively, a second tab-side DATA terminal 21A (i.e., DATA-terminal) and a second tab-side DATA terminal 21B (i.e., DATA + terminal).
The second connector 20 is further provided with a second connector-side power terminal 22 (i.e. VBUS terminal) for interfacing with a power terminal in the power interface or the data interface to realize power transmission. The connector-side power terminals 22 can be mated with the interface-side power terminals in the power USB interface, thereby realizing power supply. In addition, when the second connector 20 is connected to a computer USB interface, the computer USB interface also has a certain power supply capability, and an interface-side power terminal is also provided therein; the second connector-side power supply terminal 22 can be mated with the interface-side power supply terminal in the computer USB interface so that power supply is performed by the computer.
For convenience of explanation, the lead wire led out from the second connector-side data terminal 21A is referred to as USB-DM, the lead wire led out from the second connector-side data terminal 21B is referred to as USB-DP, and the lead wire led out from the second connector-side power supply terminal 22 is referred to as USB-Vbus-a.
The conversion chip 30 of the present embodiment is an AU103 type chip. The AU103 chip has a signal conversion function, namely, can convert sound source signals from the mobile phone side to form driving signals for driving sound production components such as earphones to produce corresponding sounds, and can convert pickup signals obtained by pickup of an external microphone to obtain corresponding pickup digital signals and transmit the pickup digital signals to the mobile phone. In addition, the AU103 chip needs to be supplied with power when operating.
As shown in fig. 1, the conversion chip 30 of the present embodiment has a chip-side data terminal 31 for data connection to the mobile phone side, a drive signal output terminal 32 for outputting a sound-emitting means drive signal, a microphone signal receiving terminal 33 for receiving a microphone signal, and a chip power supply terminal 34 for receiving power supply, corresponding to the AU103 chip function described above. In the present embodiment, data exchange between the conversion chip 30 and the mobile phone is performed through the chip-side data terminal 31, that is, both a sound source signal (usually, a digital signal) from the mobile phone and a microphone digital signal transmitted to the mobile phone are performed through the chip-side data terminal 31, that is, the chip-side data terminal 31 is used as a sound source signal input terminal for inputting a mobile phone-side sound source signal into the chip in the present embodiment, and is also used as an output terminal for outputting a microphone digital signal of the chip to a picked-up digital signal of the mobile phone.
In the present embodiment, the chip-side data terminal 31 in the conversion chip 30 corresponds to the first tab-side data terminal 11 in the first tab 10, i.e., has two chip-side data terminals 31. For convenience of description, the wires connected to the two chip-side data terminals 31 will be referred to as AU-DP and AU-DM, respectively. The conversion chip 30 further includes an earphone detection terminal for detecting whether or not an earphone is connected, and a lead connected to the earphone detection terminal is hereinafter referred to as AU-PhoneSense. In addition, the conversion chip 30 is further connected to a clock circuit for providing a clock signal when the chip operates, and the clock circuit may adopt a structure existing in the prior art, which is not described herein again.
The sound emission unit 40 is a pair of earphone units, and the earphone units are connected to the driving signal output terminal 32 so as to emit corresponding sounds (for example, play music or play call voice when a mobile phone is in a call) driven by the driving signal output from the driving signal output terminal 32. In this embodiment, a microphone unit 41 is further integrated on the sound generating unit 40, and the microphone unit 41 is connected to the microphone signal receiving terminal 33, so as to transmit the collected sound pickup signal to the conversion chip 30 for processing.
Fig. 4 is a circuit structure diagram of the switching circuit according to the embodiment of the present invention.
As shown in fig. 1 and 4, the switching circuit 50 includes a switch 51 (i.e., SW), and the switch 51 is a three-pole double-throw switch having three fixed contacts and moving contacts corresponding to the six fixed contacts, respectively, wherein the fixed contact 1 corresponds to the moving contact 4 and the moving contact 5, the fixed contact 2 corresponds to the moving contact 6 and the moving contact 7, and the fixed contact 3 corresponds to the moving contact 8 and the moving contact 9.
In this embodiment, the connection relationship of the contacts of the changeover switch 51 is as follows:
the stationary contact 1 is connected to TypeC-DP via a filter circuit 52A, that is, to the first-terminal-side data terminal 11B in the first terminal 10, wherein the filter circuit 52A is formed by connecting a resistor and an inductor in parallel;
the movable contact 4 is connected to AU-DP, i.e., to one of the chip-side data terminals 31 in the conversion chip 30;
the movable contact 5 is connected to the USB-DP, that is, to the second-connector-side data terminal 21B in the second connector 20.
The stationary contact 2 is connected to TypeC-DM via a filter circuit 52B, that is, to the first connector-side data terminal 11A in the first connector 10, wherein the filter circuit 52B has the same structure as the filter circuit 52A and is formed by connecting another resistor in parallel with another inductor;
the movable contact 6 is connected with AU-DM, that is, with the other of the chip-side data terminals 31 in the conversion chip 30;
the movable contact 7 is connected to the USB-DM, that is, to the second connector-side data terminal 21A in the second connector 20.
The stationary contact 3 is connected with AU-PhoneSense, namely, connected with the earphone detection terminal in the conversion chip 30;
the moving contact 8 is connected with PhoneSense, which is a detection signal line leading out from the sound emitting unit 40 and providing earphone detection signals;
the moving contact 9 is connected to PhoneSense-GND, which is a ground line connected to ground through a resistor.
The switch 51 has an exposed lever portion, and when a user toggles the lever portion, the connection relationship between the stationary contact and the movable contact is switched accordingly.
For example, fig. 4 shows a state in which the fixed contact 1 is connected to the movable contact 4, the fixed contact 2 is connected to the movable contact 6, and the fixed contact 3 is connected to the fixed contact 8, in which state TypeC-DP is connected to AU-DP, TypeC-DM is connected to AU-DM, and AU-PhoneSense is connected to PhoneSense. Accordingly, the first tab-side data terminal 11B and the first tab-side data terminal 11A are respectively connected correspondingly to the two chip-side data terminals 31, so that the first tab 10 can transmit the data signal on the mobile phone side to the conversion chip 30. Meanwhile, the earphone detection terminal of the conversion chip 30 acquires a detection signal through the AU-PhoneSense and PhoneSense to detect the existence of the earphone. Then, the conversion chip 30 performs a signal conversion operation according to the detection signal, converts the sound source signal from the mobile phone into a driving signal to make the sound unit 40 emit sound, or converts the sound pickup signal of the microphone 41 into a digital signal and transmits the digital signal to the mobile phone through the first connector 10; thus, the user can listen to music played by the cellular phone using the sound emitting unit 40 or perform a voice call using the sound emitting unit 40 and the microphone 41 as voice components of the cellular phone.
When the user dials the lever part, so that the connection relationship in the switch 51 in the state shown in fig. 4 is switched, the connection relationship of the movable contact 1 is switched from being connected with the fixed contact 4 to being connected with the movable contact 5, the connection relationship of the movable contact 2 is switched from being connected with the fixed contact 6 to being connected with the movable contact 7, the connection relationship of the movable contact 3 is switched from being connected with the fixed contact 8 to being connected with the movable contact 9, and accordingly, type c-DP is switched to be connected with USB-DP, type c-DM is switched to be connected with USB-DM, and AU-PhoneSense is switched to be connected with PhoneSense-GND. In this state, the first connector-side data terminal 11B is connected to the second connector-side data terminal 21B, the first connector-side data terminal 11A is connected to the second connector-side data terminal 21A, and the earphone detection terminal of the conversion chip 30 is grounded. At this time, the second connector 20 can be connected to a computer, so that data transmission between the computer and the mobile phone is performed through the second connector 20 and the first connector 10; meanwhile, the earphone detection terminal of the conversion chip 30 no longer acquires the earphone detection signal, and the conversion chip 30 stops the signal conversion action. In this state, when the user dials the lever part again, the connection relationship of the switch 51 is switched back to the state shown in fig. 4, and the conversion chip 30 performs the signal conversion operation again.
Fig. 5 is a circuit structure diagram of a power circuit according to an embodiment of the present invention.
As shown in fig. 5, the power circuit 60 includes A first power node 61 connected to the USB-VBUS-A, A second power node 62 connected to the C-VBUS-A, and A third power node 63 for supplying power to the converter chip 30, wherein the first power node 61 and the second power node 62 are respectively connected in parallel to the third power node 63 through A MOSFET device Q1 and A MOSFET device Q2, so that the USB-VBUS-A and the C-VBUS-A are respectively connected in parallel to the AU-VBUS through the MOSFET devices, and the first connector 10, the second connector 20 and the converter chip 30 are respectively electrically connected. Therefore, when the first connector 10 is connected with the mobile phone and the second connector 20 is not connected with the power supply, the voltage at the second power supply node 62 is higher than that at the first power supply node 61, so that the current flows from the C-VBUS-A to the AU-VBUS, and the conversion chip 30 is powered by the mobile phone through the first connector 10 in this state; when the first connector 10 is connected to the handset and the second connector 20 is connected to the power supply, since the power supply voltage is usually higher than the handset side voltage, the voltage at the second power supply node 62 is lower than that at the first power supply node 61, so that the current flows from the USB-VBUS-A to the AU-VBUS, and the conversion chip 30 is powered by the power supply through the second connector 20. Meanwhile, as the power supply voltage is higher than the side voltage of the mobile phone, the current flows from the USB-VBUS-A to the C-VBUS-A, so that the power supply can supply power to the mobile phone at the same time, namely, the mobile phone is charged.
In addition, when the second connector 20 is connected to a computer, if the voltage at the USB interface of the computer is low, the conversion chip 30 is still powered by the mobile phone; if the voltage at the USB interface of the computer is high, the conversion chip 30 can be powered by the computer.
In this embodiment, the AU-VBUS is connected to the chip power supply terminal 34 through a chip power supply circuit matched with the AU103 chip, the chip power supply circuit may be designed and manufactured according to chip requirements or suggestions of chip suppliers, and when the conversion chip 30 is replaced with another type of chip in other embodiments, the power supply circuit structure also needs to be modified and adjusted according to actual situations, and detailed structures thereof are not described herein again.
Examples effects and effects
According to the earphone charging data line with switching function provided by this embodiment, since the switching circuit includes a switch, the changeover switch is capable of switching the connection state under user operation so that the user can connect the first tab side data terminal with the second tab side data terminal, or the first connector side data terminal is connected with the sound source signal input terminal, so that the earphone charging data line with the switching function of the embodiment can enable a user to manually switch the data connection state of the mobile phone, and enable the mobile phone to be connected with a computer and simultaneously output a driving signal to the sound production unit by adopting the conversion chip according to the requirement of the user, that is, the earphone charging data line with the switching function of the embodiment can realize the charging of the mobile phone and simultaneously carry out data transmission or earphone use according to the selection of the user.
The earphone charging data line with the switching function further comprises a sound production unit and a microphone, so that the earphone charging data line can be directly used as a mobile phone earphone line without an external earphone or a microphone. When the mobile phone connecting wire is used as a mobile phone earphone wire, the mobile phone can be charged according to the requirements of a user, or the function of the mobile phone earphone wire is suspended to enable data transmission between the mobile phone and a computer, so that the mobile phone connecting wire of the embodiment has three functions of charging, earphone and data transmission, and the earphone and the data transmission can be switched at will according to the requirements of the user.
In an embodiment, the power circuit is in a form of including two MOSFET devices, and the two MOSFET devices can control the flow direction of current according to the voltage at different nodes, so that the power circuit can automatically supply power to the conversion chip according to the connection state (corresponding to the voltage level) at the first connector or the second connector, and realize mobile phone charging when the second connector is connected with a power supply or a computer data interface with higher supply voltage.
The above embodiments are only used for illustrating different embodiments of the present invention, and the protection scope of the present invention is not limited to the description scope of the above embodiments.
For example, in the embodiment, the earphone charging data line with the switching function is in a form of including a sound generating unit, and thus can be directly used as an earphone line. But in the utility model discloses in, also can remove sound production unit and microphone to connect earphone interface (for example 3.5mm earphone interface) with drive signal output terminal department, make the utility model discloses an earphone charging data line with switching function can external other earphones use. In addition, also can only remove sound generating unit, connect earphone interface and the microphone in this earphone interface installation embodiment with drive signal output terminal department, like this the utility model discloses an earphone charging data line with switching function realizes microphone pickup function when just can external earphone that does not have the microphone function, also can carry out voice conversation when utilizing no microphone function earphone.
In the embodiment, the power circuit is in a form including two MOSFET devices, so that the power circuit can automatically supply power to the switching chip according to the connection state of the first connector or the second connector, but in the utility model discloses a form that the power circuit can also be designed to include a switch, allows a user to switch the connection relation of the chip power terminals according to the requirement, and thus realizes the manual switching of the chip power supply.
The conversion chip of the embodiment is an AU103 type chip, which can simultaneously convert and transmit the sound source signal, the microphone signal, and the like. In the utility model, the conversion chip can be replaced by other types of chips with conversion function, such as chips with the same function as the AU103, or chips with only the function of converting sound source signals; when the chip only having the sound source signal conversion function is selected, the microphone is correspondingly removed.
In addition, the first joint in the embodiment adopts the type C form, and the second joint adopts the USB form, but in the utility model discloses in, the first joint also can adopt other joint forms that can be connected with the cell-phone, the second joint also can adopt other joint forms that can be connected with power and computer, as long as be equipped with in this first joint and the second joint with the embodiment each terminal that the function is the same.
Claims (8)
1. An earphone charging data line with a switching function, comprising:
the first connector is used for being connected with a mobile phone interface of a mobile phone and is provided with a first connector side data terminal corresponding to a mobile phone side data terminal in the mobile phone interface;
the second connector is used for being connected with a power interface of a charging power supply when the mobile phone is charged or connected with a data interface of a computer when the mobile phone carries out data transmission, and is provided with a second connector side data terminal corresponding to an interface side data terminal in the data interface;
the conversion chip is used for converting the sound source signal of the mobile phone into a driving signal for driving the sound production unit and is provided with a sound source signal input terminal and a driving signal output terminal;
a switching circuit having a switch,
the switch is connected to the sound source signal input terminal, the first connector-side data terminal, and the second connector-side data terminal, respectively, and is configured to allow a user to switch a connection relationship of the switch so as to connect the first connector-side data terminal to the second connector-side data terminal, or connect the first connector-side data terminal to the sound source signal input terminal.
2. The earphone charging data line with switching function according to claim 1, further comprising:
and the at least one sound generating unit is connected with the driving signal output terminal and used for receiving the driving signal.
3. The earphone charging data line with switching function according to claim 1, further comprising:
a microphone (C) is (are) provided,
the conversion chip is also provided with a microphone signal receiving terminal, and the microphone is connected with the microphone signal receiving terminal.
4. The earphone charging data line with switching function according to claim 1, further comprising:
and the earphone interface is connected with the driving signal output terminal and used for transmitting the driving signal to an external earphone.
5. The earphone charging data line with switching function according to claim 4, further comprising:
a microphone mounted at the earphone interface,
the conversion chip is also provided with a microphone signal receiving terminal, and the microphone is connected with the microphone signal receiving terminal.
6. The earphone charging data line with switching function according to claim 1, wherein:
wherein the changeover switch has at least a fixed contact connected to the first connector-side data terminal and a pair of movable contacts mated with the fixed contact,
one of the pair of moving contacts is connected to the audio signal input terminal, and the other is connected to the second connector-side data terminal.
7. The earphone charging data line with switching function according to claim 6, wherein:
wherein the conversion chip is also provided with an earphone detection terminal,
the change-over switch is also provided with a fixed contact connected with the earphone detection terminal and a pair of movable contacts matched with the fixed contact, one movable contact of the pair of movable contacts is connected with the earphone detection terminal, and the other movable contact of the pair of movable contacts is connected with the grounding wire.
8. The earphone charging data line with switching function according to claim 1, further comprising:
a power supply circuit for supplying a power to the power supply circuit,
wherein the first connector is also provided with a first connector side power terminal matched with the power terminal in the mobile phone interface,
the second connector further has a second connector-side power terminal that mates with the power terminal in the power interface or the data interface,
the conversion chip also has a chip-side power supply terminal for receiving a power supply,
the power supply circuit has a plurality of power supply nodes connected to the first connector-side power supply terminal, the second connector-side power supply terminal, and the chip-side power supply terminal,
the power supply nodes are connected in parallel by MOSFET elements so that a current flows from the first terminal-side power supply terminal to the chip-side power supply terminal when the first terminal is connected to the handset interface and the second terminal-side power supply terminal is not connected, and a current flows from the second terminal-side power supply terminal to the chip-side power supply terminal when the second terminal-side power supply terminal is connected to the power supply interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922076688.2U CN211017626U (en) | 2019-11-27 | 2019-11-27 | Earphone charging data line with switching function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922076688.2U CN211017626U (en) | 2019-11-27 | 2019-11-27 | Earphone charging data line with switching function |
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| Publication Number | Publication Date |
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| CN211017626U true CN211017626U (en) | 2020-07-14 |
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| CN201922076688.2U Active CN211017626U (en) | 2019-11-27 | 2019-11-27 | Earphone charging data line with switching function |
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| Country | Link |
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| CN (1) | CN211017626U (en) |
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2019
- 2019-11-27 CN CN201922076688.2U patent/CN211017626U/en active Active
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