CN219918441U

CN219918441U - Charging stand

Info

Publication number: CN219918441U
Application number: CN202320538192.6U
Authority: CN
Inventors: 王金桥; 王昌锋
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-10-27
Anticipated expiration: 2033-03-14

Abstract

The utility model provides a charging seat, which relates to the technical field of charging, and can be suitable for different scenes, so that convenience in the use process of the charging seat is improved; and the circuit has simple structure and lower cost. The charging stand comprises an input interface, a first transmission interface, a second transmission interface, a control sub-circuit, a first stage sub-circuit and a second stage sub-circuit. And under the condition that the input interface and/or the first transmission interface output valid signals, the control sub-circuit is conducted and outputs second voltage signals. And under the condition that the control sub-circuit outputs the second voltage signal, the first stage sub-circuit is used for outputting the voltage transmitted by the first transmission interface to the second transmission interface under the common control of the control sub-circuit and the first transmission interface. And under the condition that the input interface outputs the first voltage signal, the second stage sub-circuit is used for transmitting the voltage carried by the first voltage signal to the second transmission interface under the control of the first voltage signal. The charging seat is used for charging.

Description

Charging stand

Technical Field

The utility model relates to the technical field of charging, in particular to a charging seat.

Background

The electronic product is a common article in daily life, and further the charging equipment is also a common tool for charging the electronic product. In general, a charging device has different forms according to the kinds of different electronic products, and has compatibility of different functions. For example, the charging device includes a charging stand, and the charging stand can provide an operating voltage for the electronic product to normally operate, and can also be connected with the processor to transmit a data signal for the electronic product. Most charging stations need to achieve this function by integrating multiple finished logic circuit modules; most of the charging seats generally cannot directly process the commercial power and generate working voltage capable of operating normally for the power supply product, and the commercial power voltage needs to be processed through a power adapter. Therefore, the existing charging stand needs more logic circuit modules to be integrated, which results in higher cost of the charging stand and complex overall circuit structure of the charging stand.

Disclosure of Invention

The embodiment of the utility model provides a charging seat which can be suitable for different scenes, and the convenience of the charging seat in the use process is improved; and the circuit structure of the charging seat is simple and the cost is lower.

In order to achieve the above purpose, the embodiment of the present utility model adopts the following technical scheme:

in a first aspect, a cradle having a dual role port is provided. The charging seat comprises an input interface, a first transmission interface, a second transmission interface and a dual-role selection circuit. The input interface is configured to transmit a first voltage signal. The first transmission interface is configured to transmit the second voltage signal and the data signal. The second transmission interface is configured to transmit the operating voltage and the data signal. The dual role selection circuit is coupled to the input interface, the first transmission interface, and the second transmission interface. The dual role selection circuit includes a control sub-circuit, a first stage sub-circuit, and a second stage sub-circuit. The control sub-circuit is coupled to the input interface and the first transmission interface, respectively. In the case that the input interface and/or the first transmission interface output valid signals, the control sub-circuit is responsive to the signals transmitted by the input interface to turn on and output the second voltage signals of the first transmission interface. The first stage subcircuit is coupled with the control subcircuit, the first transmission interface and the second transmission interface; in the case that the control sub-circuit outputs the second voltage signal, the first stage sub-circuit is configured to output the voltage transmitted by the first transmission interface to the second transmission interface under the common control of the control sub-circuit and the first transmission interface. The second stage subcircuit is coupled with the input interface and the second transmission interface; in the case that the input interface outputs the first voltage signal, the second stage subcircuit is configured to transmit the first voltage signal to the second transmission interface under control of the first voltage signal.

Because of the difference of the transmission signals of the first transmission interface coupled with the dual-role selection circuit, the control sub-circuit responds to the different signals (such as a high level signal or a low level signal) transmitted by the first transmission interface to control the first stage sub-circuit to be turned on or turned off; and the dual-role selection circuit can simultaneously judge whether the input interface has the first voltage signal output so as to conduct the second-stage subcircuit, thereby realizing the output of the working voltage through the second transmission interface. Based on the communication protocol that the first transmission interface and the second transmission interface meet the data signal transmission, the data signal transmission can be realized while the voltage signal transmission is performed. The charging seat judges the charging seat as main equipment through signals transmitted by a first transmission interface and an input interface which are coupled by a dual-role selection circuit, and the charging seat transmits the voltage transmitted by the input interface to a second transmission interface to charge electronic equipment coupled with the second transmission interface; or the charging seat is judged to be the slave device, and the electronic device coupled with the first transmission interface charges the charging seat so that the charging seat charges the electronic device coupled with the second transmission interface. The application has the advantages that the specific structure of the dual-role selection circuit is arranged instead of the existing finished product, the cost is lower, the structure of the dual-role selection circuit is simple, and the process difficulty is lower.

In some examples, the first transmission interface includes a bus pin and a channel configuration pin. The control sub-circuit is coupled to the channel configuration pins. The first stage subcircuit is coupled to the bus pin. The voltage transmitted by the channel configuration pins of the first transmission interface and the voltage transmitted by the bus pins are related to the device connected with the first transmission interface. Under the condition that the input interface does not output a first voltage signal, the voltage transmitted by the channel configuration pin and the voltage transmitted by the bus pin are controlled together to conduct the first-stage subcircuit or switch off the first-stage subcircuit; and under the condition that the first stage of sub-circuit is conducted, the voltage transmitted by the bus pin of the first transmission interface is output to the second transmission interface.

In some examples, the control sub-circuit includes a first diode, a second diode, and a third resistor. One end of the first diode is coupled with the channel configuration pin of the first transmission interface, and the other end of the first diode is coupled with the first node. One end of the second diode is coupled with the input interface, and the other end of the second diode is coupled with the first node. One end of the third resistor is coupled with the input interface, and the other end of the third resistor is grounded. Wherein the first node is coupled to the first stage subcircuit.

In some examples, the first stage subcircuit includes a first transistor, a first resistor, and a first capacitor. The first electrode of the first transistor is coupled to the second node, the second electrode of the first transistor is coupled to the third node, and the control electrode of the first transistor is coupled to the first node. One end of the first resistor is coupled with the second node, and the other end is coupled with the first node. One end of the first capacitor is coupled with the second node, and the other end is coupled with the first node. The second node is coupled with a bus pin of the first transmission interface; the third node is coupled to the second transmission interface.

In some examples, the second stage subcircuit includes a switch subcircuit and a charging subcircuit. The switch sub-circuit is coupled to the input interface and the fourth node and is configured to control whether the voltage transmitted by the input interface is transmitted to the fourth node. The charging sub-circuit is coupled with the fourth node, the second transmission interface and the input interface and is configured to transmit the voltage carried by the first voltage signal to the second transmission interface under the combined action of the voltage of the fourth node and the first voltage signal.

In some examples, the switching sub-circuit includes a third transistor, a fourth resistor, and a fifth resistor. The first electrode of the third transistor is grounded, the second electrode of the third transistor is coupled with the fourth node, and the control electrode of the third transistor is coupled with the fifth node. One end of the fourth resistor is coupled with the input interface, and the other end of the fourth resistor is coupled with the fifth node. One end of the fifth resistor is grounded, and the other end is coupled to the fifth node.

In some examples, the charging subcircuit includes a second transistor, a second resistor, and a second capacitor. The first pole of the second transistor is coupled to the input interface, the second pole of the second transistor is coupled to the second transmission interface, and the control pole of the second transistor is coupled to the fourth node. One end of the second resistor is coupled with the input interface, and the other end of the second resistor is coupled with the fourth node. One end of the second capacitor is coupled with the input interface, and the other end of the second capacitor is coupled with the fourth node.

In some examples, the input interface includes a buck voltage regulator sub-circuit. The voltage-reducing voltage stabilizer circuit is coupled with the dual-role selection circuit, and is configured to perform voltage-stabilizing and voltage-reducing processing on the voltage received by the input interface and transmit the voltage to the dual-role selection circuit.

In some examples, the first transistor and the second transistor are field effect transistors; the third transistor is a triode.

In some examples, the cradle further comprises a housing. The dual-role selection circuit is arranged in the shell. The shell is provided with an input interface, a first transmission interface and a second transmission interface, and the jack of the input interface, the jack of the first transmission interface and the jack of the second transmission interface are exposed outside the shell.

Drawings

Fig. 1 is a structural diagram of a charging stand according to an embodiment of the present application;

fig. 2 is a block diagram of a charging stand according to an embodiment of the present application;

fig. 3 is another block diagram of a charging stand according to an embodiment of the present application;

fig. 4 is a block diagram of still another structure of a charging stand according to an embodiment of the present application;

fig. 5 is a block diagram of still another structure of a charging stand according to an embodiment of the present application;

fig. 6 is a block diagram of a dual-role selection circuit of a charging stand according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the application are shown.

In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In describing the present application, it should be noted that the expression "coupled" and "connected" and derivatives thereof may be used in describing some embodiments, unless explicitly stated and limited otherwise. For example, "connected" is to be broadly interpreted, as referring to a fixed connection, a removable connection, or an integral connection, for example; either directly, electrically, indirectly via an intermediate medium, or in communication with the interior of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Generally, electronic devices include mobile phones, computers, floor sweepers, code sweepers, electronic watches, and the like. The electronic device needs to be charged by the charging device to satisfy daily operations.

The charging equipment comprises charging equipment with various forms and application scenes, such as a charging seat, a charging pile, an on-vehicle charger and the like. And selecting different charging equipment according to different requirements and application scenes to charge the electronic equipment. And the charging equipment can also be compatible with the function of data signal transmission, and can realize the data signal transmission between two electronic equipment. For example, the mobile phone and the computer are connected through a charging device (for example, a charging seat), the computer can charge the mobile phone, data information in the computer can be transmitted to the mobile phone through the charging device, and the mobile phone can also transmit the data information in the mobile phone to the computer through the charging device. It can be understood that the logic of charging the computer by the mobile phone is not generally used for setting the charging equipment, and the grade comparison of two electronic devices connected with the charging equipment can be realized by setting the logic circuit of the charging equipment, so as to judge the charging direction.

The following embodiments take a charging device as a charging seat, and a charged electronic device as a code scanning integrated machine as an example for exemplary description. In some examples, a code scanning all-in-one machine includes a housing, a code scanning module, and a code scanning window. The code scanning module is arranged in the shell. The infrared light source emitted by the code scanning module passes through the code scanning window and irradiates the scanned two-dimensional code and reflects the code scanning module, and the code scanning module obtains information (such as information of a graph) of the scanned two-dimensional code after compiling. The code scanning all-in-one machine can also comprise other functions, and the application is not particularly limited to the functions. The charging seat can be connected with a computer, a power adapter or other electronic equipment through a serial bus (Universal Serial Bus, abbreviated as USB) port, and processes electric signals transmitted by the electronic equipment so as to transmit the electric signals to the code scanning all-in-one machine, so that the code scanning all-in-one machine is charged. For example, the USB port includes one or more interfaces such as a USB Type-A interface, a USB Type-B interface, and a Type-C interface.

It can be understood that the signal channels and communication protocols of different types of interfaces are different, and the transmitted signals and voltage values are different, so that the signal and voltage values can be adjusted according to actual requirements.

In some examples, cradle 100 is a charging device with a dual role port. The Dual Role Port (DRP) is an interface having a dynamic switching function of a downstream Port (Downstream Facing Port, DFP) Role and an upstream Port (Upstream Facing Port, UFP) Role.

As shown in fig. 1, the cradle 100 includes a housing 101, an input interface 10, a first transmission interface 20, a second transmission interface 30, and a dual-role selection circuit 40 (see fig. 2).

The housing 101 is provided with an input interface 10, a first transmission interface 20 and a second transmission interface 30, and the jack of the input interface 10, the jack of the first transmission interface 20 and the jack of the second transmission interface 30 are exposed outside the housing 101, so that the cradle 100 is connected with other electronic devices through the input interface 10, the first transmission interface 20 and the second transmission interface 30, and performs transmission of electric signals and data signals. Illustratively, the first transmission interface 20 is coupled to an electronic device capable of providing a supply voltage. The second transmission interface 30 is coupled to a charged device (e.g., a code scanning all-in-one machine). Here, the connection relationship between the dual-role selection circuit 40 and the first transmission interface 20 and the second transmission interface 30 and the signal transmission relationship are divided, and the connection object of these two interfaces is not limited in this embodiment.

As shown in fig. 2, the input interface 10 is configured to transmit a first voltage signal. For example, the input interface 10 is an interface capable of directly receiving 12V voltage, so as to meet the condition that part of electronic elements in the charging stand 100 are driven to operate by 12V voltage, and improve the circuit integration effect of the charging stand 100. And, the input interface 10 processes the 12V voltage to generate a 5V voltage, and transmits the 5V voltage to the dual-role selection circuit 40. For example, the voltage value of the first voltage signal is 5V.

The first transmission interface 20 is configured to transmit a second voltage signal or a data signal. For example, the first transmission interface 20 includes a Type-C interface, which includes a bus pin VBUS, channel configuration pins CC (CC 1 and CC 2), differential signal pins, and the like, which transmit different signals. The bus pin VBUS is used for transmitting an electrical signal. The channel configuration pins CC (CC 1 and CC 2) are used for transmitting signals for distinguishing the positive and negative directions of the interface so as to identify the charging direction. The differential signal pins may transmit data signals according to different communication protocols, as well as analog signals.

The second transmission interface 30 is configured to output an operating voltage V-work or a data signal SDATA. The data signal SDATA includes an analog signal and a digital signal. The second transmission interface 30 is, for example, a USB type interface capable of transmitting digital signals and video stream signals (e.g., mobile signals).

The second transmission interface 30 is connected with the code scanning integrated machine, and the charging seat 100 transmits the working voltage to the code scanning integrated machine to charge the code scanning integrated machine; or (the first transmission interface 20 of) the charging seat 100 is connected with an electronic device (such as a computer) with a processor, and the interaction of data signals between scanning of the code scanning integrated machine and the computer is realized through the charging seat 100. For example, the second transmission interface 30 includes a channel configuration channel CC, and is capable of transmitting a signal of the two-dimensional code scanned by the code scanning integrated machine to the charging stand 100, and then, the dual-role selection circuit 40 in the charging stand 100 performs information processing and judgment, so that the code scanning integrated machine can be charged by the charging stand 100, and also the information of the two-dimensional code scanned by the code scanning integrated machine can be transmitted to the computer, or an execution operation instruction of the computer can be transmitted to the scanned two-dimensional code (for example, the scanned two-dimensional code is deducted and a deduction result is displayed).

As another example, the second transmission interface 30 is connected to an electronic device having a display function, and the cradle 100 transmits the video stream signal output from the first transmission interface 20 to the electronic device having the display function to display an image. The present embodiment illustrates that the second transmission interface 30 of the cradle 100 may transmit a video stream signal or a digital signal.

As shown in fig. 2, the dual-role selection circuit 40 is used to determine that the cradle 100 is a master device, discharge a device coupled to the second transmission interface 30, or perform data signal transmission; the cradle 100 is also a slave device that is charged by a device coupled to the first transmission interface 20 or the input interface 10, and thus transmits the received power to a device coupled to the second transmission interface 30.

Illustratively, the dual role selection circuit 40 is coupled to the input interface 10, the first transport interface 20, and the second transport interface 30. As shown in fig. 3, the dual-role selection circuit 40 includes a control sub-circuit 41, a first stage sub-circuit 42, and a second stage sub-circuit 43.

The control sub-circuit 41 is coupled to the channel configuration pins CC of the input interface 10 and the first transmission interface 20, respectively. In the case where the channel configuration pin CC of the input interface 10 and/or the first transmission interface 20 outputs a valid signal, the control sub-circuit 41 turns on and outputs a second voltage signal in response to the signal transmitted by the input interface 10.

It is understood that the "valid signal" refers to a signal that can turn on the control sub-circuit 41 and transmit to the first stage sub-circuit 42, and can turn on the first stage sub-circuit 42. The control sub-circuit 41 is used for controlling whether the first stage sub-circuit 42 is turned on or not, and thus, the conduction conditions of the control sub-circuit 41 and the electronic components of the first stage sub-circuit 42 are correlated. For example, the first stage subcircuit 42 needs the low level signal to be on, and the active signal is the low level signal. This is related to the type of electronic components in the first stage subcircuit 42, which is not limited in this embodiment and may be set as desired.

The first stage subcircuit 42 is coupled with the control subcircuit 41, the bus pin VBUS of the first transmission interface 20, and the second transmission interface 30. In the case where the control sub-circuit 41 outputs the second voltage signal, the first stage sub-circuit 42 is configured to output the voltage of the bus pin transfer VBUS of the first transfer interface 20 to the second transfer interface 30 under the common control of the control sub-circuit 41 and the bus pin VBUS of the first transfer interface 20.

The second stage subcircuit 43 is coupled with the input interface 10 and the second transmission interface 30; in case the input interface 10 outputs a first voltage signal, the second stage sub-circuit 43 is configured to transmit a voltage carried by the first voltage signal to the second transmission interface 30 under control of the first voltage signal.

Since the dual-role selection circuit 40 is different according to the transmission signals of the coupled first transmission interface 20, the control sub-circuit controls the first stage sub-circuit 42 to be turned on or off in response to different signals (e.g., high level signals or low level signals) transmitted by the first transmission interface; and, the dual-role selection circuit 40 can simultaneously judge whether the input interface 10 has the first voltage signal output to turn on the second stage sub-circuit 43, thereby realizing the output of the working voltage through the second transmission interface 30. Based on the communication protocol that the first transmission interface 20 and the second transmission interface 30 satisfy the data signal transmission, the data signal transmission can be realized while the transmission of the voltage signal is performed. The charging stand 100 determines that the charging stand 100 is a main device according to signals transmitted by the first transmission interface 20 and the input interface 10 coupled to the dual-role selection circuit 40, and the charging stand 100 transmits a voltage transmitted by the input interface 10 to the second transmission interface 30 to charge an electronic device coupled to the second transmission interface 30; or, the electronic device coupled to the first transmission interface 20 charges the charging stand 100 when the charging stand 100 is determined to be a slave device, so that the charging stand 100 charges the electronic device coupled to the second transmission interface 30. Like this, charging seat 100 can carry out the role based on different scenes and judge, and then realize the function of charging for charging seat 100 can be applicable in different scenes, improves the convenience in the charging seat 100 use.

In the case that the control sub-circuit 41 outputs the second voltage signal to the first stage sub-circuit 42, the bus pin VBUS of the first transmission interface 20 transmits the bus voltage signal to the first stage sub-circuit 42, so that the first stage sub-circuit 42 transmits the bus voltage to the second transmission interface 30 under the common control of the second voltage signal and the bus voltage. In the case where the control sub-circuit 41 has no valid signal output, the first stage sub-circuit 42 is turned off and the second stage sub-circuit 43 is turned on; in the case where the input interface 10 outputs the first voltage signal, the second stage sub-circuit 43 transmits the first voltage signal to the second transmission interface 30 under the control of the first voltage signal. The charging stand 100 determines that the charging stand 100 is a master/slave device through the dual-role selection circuit 40, and further determines the master/slave device type of various electronic devices coupled with the second transmission interface 30, so as to realize the charging (data signal transmission) function of the charging stand 100. The application has lower cost by setting the specific structure of the dual-role selection circuit 40 instead of the existing finished product, and the dual-role selection circuit 40 has simple structure and lower process difficulty.

Illustratively, the first transmission interface 20 is a USB type interface. The first transmission interface 20 includes a voltage transmitted by the channel configuration pin CC and a bus pin VBUS.

The interface type of the device connected to the first transmission interface 20 may include a USB type interface, an ethernet interface, or a high definition multimedia interface (High Definition Multimedia Interface, abbreviated HDMI), which is not limited in this embodiment. In this way, the interface converters and the data lines coupling the electronic device and the first transmission interface 20 are different based on the different interface types of the electronic device, and thus the specific voltage values of the voltage transmitted through the channel configuration pin CC and the voltage transmitted through the bus pin VBUS of the first transmission interface 20 are also different. Thus, the voltage transmitted by the channel configuration pin CC and the voltage transmitted by the bus pin VBUS of the first transmission interface 20 are both related to the device to which the first transmission interface 20 is connected. For example, different devices connected to the first transmission interface 20 may output the same voltage through the bus pin VBUS of the first transmission interface 20, but the voltage value output by the channel configuration pin CC may be the same or different. Thus, in the case where the first transmission interface 20 is connected to a different device, a logic judgment of turning on or off the control sub-circuit 41 and the first stage sub-circuit 42 in the cradle 100 is implemented to judge that the cradle 100 is a master/slave device, and a corresponding function (charging, discharging of the cradle 100 or data transmission through the cradle 100) is implemented.

In the case that the input interface 10 does not output the first voltage signal, the voltage transmitted by the channel configuration pin CC and the voltage transmitted by the bus pin VBUS are controlled together to turn on the first stage subcircuit 42 or turn off the first stage subcircuit 42. With the first stage subcircuit 42 turned on, the voltage transmitted by the bus pin VBUS of the first transmission interface 20 is output to the second transmission interface 30.

For example, the voltage transmitted by the channel configuration pin CC may be a high level signal or a low level signal, which is set according to the actual requirement.

In some examples, as shown in fig. 6, the control sub-circuit 41 employs an or gate. For example, the control sub-circuit 41 includes a first diode D1, a second diode D2, and a third resistor R3. The first diode D1 and the second diode D2 are in parallel connection, and are respectively connected to different input ends.

One end of the first diode D1 is coupled to the channel configuration pin CC of the first transmission interface 20, and the other end is coupled to the first node N1. Wherein the first node N1 is coupled to the first stage subcircuit 42.

One end of the second diode D2 is coupled to the input interface 10, and the other end is coupled to the first node N1.

One end of the third resistor R3 is coupled to the input interface 10, and the other end is grounded GND. By way of example, the third resistor R3 acts as a pull-down resistor, and in the case where no electrical signal is input to the input interface 10, the third resistor R3 is used to pull down the potential of the first node N1, so that the second diode D2 is turned on. For example, the resistance value of the third resistor R3 is 10kΩ to 100kΩ.

The first diode D1 and the second diode D2 include schottky diodes, which have small voltage drop, so as to be beneficial to improving the voltage transmission efficiency of the control sub-circuit 41.

As illustrated in fig. 6, the cathode of the first diode D1 is coupled to the channel configuration pin CC of the first transmission interface 20, and the anode is coupled to the first node N1. The cathode of the second diode D2 is coupled to the input interface 10 and the anode is coupled to the first node N1. In this way, based on the unidirectional conductivity of the diode, the first diode D1 is turned on when the potential of the first node N1 is greater than the potential transmitted by the channel configuration pin CC of the first transmission interface 20. Similarly, in the case where the potential of the first node N1 is greater than the potential transmitted by the input interface 10, the second diode D2 is turned on.

It will be understood that the first node N1 in the circuit provided in this embodiment, and the second node N2, the third node N3, the fourth node N4, and the fifth node N5 provided in the subsequent embodiments, do not represent actually existing components, but represent junction points of related electrical connections in the circuit diagram, that is, the nodes are equivalent nodes of junction points of related electrical connections in the circuit diagram.

In some examples, as shown in fig. 6, the first stage subcircuit 42 includes a first transistor Q1, a first resistor R1, and a first capacitor C1.

The first pole of the first transistor Q1 is coupled to the second node N2, the second pole of the first transistor Q1 is coupled to the third node N3, and the control pole of the first transistor Q1 is coupled to the first node N1. Wherein the second node N2 is coupled to the bus pin VBUS of the first transmission interface 20; the third node N3 is coupled to the second transmission interface 30. The first transistor Q1 includes a field effect transistor, for example. For example, the first transistor Q1 is a P-type field effect transistor, and is turned on when an absolute value of a potential difference between the control electrode and the first electrode is greater than a threshold voltage.

One end of the first resistor R1 is coupled to the second node N2, and the other end is coupled to the first node N1. For example, the first resistor R1 may be a constant value resistor, for example, a constant value resistor having a resistance value of 100kΩ. The two ends of the first resistor R1 are connected with the first node N1 and the bus pin VBUS of the first transmission interface 20, so that a circuit protection effect is achieved; meanwhile, in the case where the control sub-circuit 41 has no effective number output, the potentials of the control electrode and the first electrode of the first transistor Q1 are made the same, that is, the first transistor Q1 is in an off state.

One end of the first capacitor C1 is coupled to the second node N2, and the other end is coupled to the first node N1. Illustratively, the first capacitor C1 acts as a buffer to reduce the pulse current, which is beneficial to improving the stability of the voltage at the control and first poles of the first transistor Q1 and the voltage at the first stage subcircuit 42 that flows through the first transistor Q1 and is transferred to the second transfer interface 30.

In some examples, as shown in fig. 6, the second stage subcircuit 43 includes a switching subcircuit 431 and a charging subcircuit 432. The switch sub-circuit 431 is coupled to the input interface 10 and the fourth node N4, and is configured to control whether the voltage transmitted by the input interface 10 is transmitted to the fourth node N4.

The charging sub-circuit 432 is coupled to the fourth node N4, the second transmission interface 30 and the input interface 10, and is configured to transmit the voltage carried by the first voltage signal to the second transmission interface 30 under the combined action of the voltage of the fourth node N4 and the first voltage signal.

In some examples, as shown in fig. 6, the switching sub-circuit 431 includes a third transistor Q3, a fourth resistor R4, and a fifth resistor R5.

The first pole of the third transistor Q3 is grounded GND, the second pole of the third transistor Q3 is coupled to the fourth node N4, and the control pole of the third transistor Q3 is coupled to the fifth node N5. The third transistor Q3 includes a transistor, for example. For example, the third transistor Q3 is a P-type transistor, and is turned on when the absolute value of the difference between the potential of the control electrode and the potential of the first electrode is greater than the threshold voltage.

One end of the fourth resistor R4 is coupled to the input interface 10, and the other end is coupled to the fifth node N5. The resistance of the fourth resistor R4 is, for example, 470kΩ to 550kΩ. For example, the resistance value of the fourth resistor R4 is 470kΩ.

One end of the fifth resistor R5 is grounded GND, and the other end is coupled to the fifth node N5. The resistance value of the fifth resistor R5 is, for example, 10kΩ to 100kΩ. For example, the resistance value of the fifth resistor R5 is 100kΩ.

The resistance of the fourth resistor R4 is greater than the resistance of the fifth resistor R5. The fourth resistor R4 and the fifth resistor R5 together form a voltage dividing resistor, and by setting the resistance value of the fourth resistor R4, the difference between the voltage of the first pole (the fourth node N4) and the voltage of the control pole of the third transistor Q3 is controlled to control the turn-on of the third transistor Q3 by regulating the absolute value of the difference between the potential of the control pole of the third transistor Q3 and the potential of the first pole to be greater than the threshold voltage.

In some examples, as shown in fig. 6, the charging subcircuit 432 includes a second transistor Q2, a second resistor R2, and a second capacitor C2.

The first pole of the second transistor Q2 is coupled to the input interface 10, the second pole of the second transistor Q2 is coupled to the second transmission interface 30, and the control pole of the second transistor Q2 is coupled to the fourth node N4. The second transistor Q2 includes a field effect transistor, for example. For example, the second transistor Q2 is a P-type field effect transistor, and is turned on when the absolute value of the difference between the potential of the control electrode and the potential of the first electrode is greater than the threshold voltage.

One end of the second resistor R2 is coupled to the input interface 10, and the other end is coupled to the fourth node N4. For example, the second resistor R2 may be a constant value resistor, for example, a constant value resistor having a resistance value of 100kΩ. The two ends of the second resistor R2 are connected with the fourth node N4 and the input interface 10, so that a circuit protection effect is achieved; meanwhile, in the case where the switching sub-circuit 431 is turned off, the potential of the control electrode and the first electrode of the second transistor Q2 is made the same, that is, the second transistor Q2 is in an off state.

One end of the second capacitor C2 is coupled to the input interface 10, and the other end is coupled to the fourth node N4. Illustratively, the second capacitor C2 serves as a buffer, reducing the pulse current, advantageously increasing the stability of the potential of the control electrode and the first electrode of the second transistor Q2, and increasing the stability of the voltage that the second stage subcircuit 43 flows through the second transistor Q2 and is transferred to the second transfer interface 30.

It is to be understood that the first transistor Q1, the second transistor Q2 and the third transistor Q are of N-type or P-type, and may be set according to practical requirements, and the embodiment of the present application is not particularly limited, and may be set according to practical requirements (for example, the cathode and anode setting directions of the first diode D1 and the second diode D2), so long as the basic logic principle of the dual-role selection circuit 40 of the present application is satisfied.

In some examples, as shown in fig. 3, 4, and 5, input interface 10 includes a buck regulator sub-circuit DCDC. Illustratively, the buck regulator sub-circuit DCDC includes a low dropout linear regulator (low dropout regulator, LDO for short) or a DC-to-DC converter (Direct Current Direct Current Converter, DC/DC for short). For example, the buck regulator sub-circuit DCDC employs a DC/DC converter.

The step-down voltage regulator circuit is coupled to the dual-role selection circuit 40, and is configured to perform voltage stabilization and step-down processing on the voltage received by the input interface 10 and output the voltage to the dual-role selection circuit 40. For example, the input interface 10 receives a 12V voltage, and the step-down regulator circuit DCDC steps down and regulates the 12V voltage, generates a 5V voltage, and outputs the 5V voltage to the dual-role selection circuit 40. Typically, a voltage of 5V drives most of the electronic components in the cradle 100 to operate normally.

In addition, as shown in fig. 3, 4 and 5, the charging stand 100 further includes a charging management module 50 and a battery 60, where the charging management module 50 can directly receive a voltage of 12V and store electric energy of 12V in the battery 60 to drive the charging stand 100 to perform signal response. The charge management module 50, the battery 60, and the dual-role selection circuit 40 are disposed in the case 101. The present embodiment is not particularly limited in the functional implementation of the charge management module 50 and the battery 60.

The operation principle of the cradle 100 is exemplarily described based on the circuit structure inside the cradle 100 provided in the above embodiment. The second transmission interface 30 of the charging stand 100 is coupled to the code scanning all-in-one machine. As shown in fig. 6, the first transistor Q1 and the second transistor Q2 in the charging stand are P-type field effect transistors, and the third transistor Q3 is a P-type triode.

First case: as shown in fig. 3, the input interface 10 of the cradle 100 receives 12V voltage, and the input interface 10 transmits 5V voltage to the dual-role selection circuit 40. And, the Type of the first transmission interface 20 is a Type-C interface. The first transmission interface 20 is connected to a computer or a power adapter. The data line connected with the Type-C interface comprises a pull-up resistor. Here, the computer or the power adapter plays a role of supplying power. The bus pin VBUS of the first transmission interface 20 transmits a 5V voltage, and the channel configuration pin CC transmits a high-level (divided by a pull-up resistor) voltage signal.

Specifically, as shown in fig. 6, the input interface 10 transmits a voltage of 5V to the control sub-circuit 41, the potential of the first node N1 is lower than the voltage transmitted by the input interface 10 coupled to the cathode of the second diode D2, and the second diode D2 is turned off. And, the high level signal transmitted by the channel configuration pin CC of the first transmission interface 20 is greater than the potential of the first node N1, and the first diode D1 is turned off. Thus, the voltage of the control electrode and the first electrode of the first transistor Q1 in the first stage subcircuit 42 is the same (the potential across the first resistor R1 is the same), the transistor on condition is not satisfied, and the first stage subcircuit 42 is turned off.

At the same time, the input interface 10 transmits 5V to the second stage sub-circuit 43. After the voltage of 5V is divided by the fourth resistor R4 and the fifth resistor R5, the voltage difference between the control electrode and the first electrode of the third transistor Q3 is greater than the turn-on voltage, so that the third transistor Q3 is turned on. At this time, the control electrode of the second transistor Q2 corresponds to the ground GND, the first electrode of the second transistor Q2 is coupled to the 5V voltage, and the second transistor Q2 is turned on, so that the first electrode of the second transistor Q2 is coupled to the 5V voltage for transmitting to the second transmission interface 30.

Like this, second transmission interface 30 is connected with sweep a yard all-in-one, and charging seat 100 is as master device, sweeps a yard all-in-one and as slave device, and charging seat 100 charges for sweeping a yard all-in-one. In this case, since the input interface 10 is connected to the power interface and receives the signal processed by the mains supply, the 12V voltage received by the input interface 10 is preferentially transmitted to the code scanning all-in-one machine, that is, the input interface 10 has a higher priority level than the first transmission interface 20.

Second case: as shown in fig. 4, the input interface 10 of the cradle 100 receives 12V voltage, and the input interface 10 transmits 5V voltage to the dual-role selection circuit 40. And, the Type of the first transmission interface 20 is a Type-C interface. The first transmission interface 20 is connected with the Type-C to ethernet module. Here, the Type-C to ethernet module serves as an interface role for data signal transmission, and the Type-C to ethernet module interface is connected with an electronic device (e.g., a computer) through a data line. The data line connected to the Type-C ethernet module includes a pull-down resistor (e.g., the pull-down resistor has a resistance of 5.1kΩ). The bus pin VBUS of the first transmission interface 20 transmits a 5V voltage, and the channel configuration pin CC transmits a low-level (divided by a pull-down resistor) voltage signal.

It can be understood that the Type-C to ethernet module interface refers to an interface converter, where one end is a Type-C interface and the other end is an ethernet interface. The ethernet interface is an interface capable of plugging in a network card or a "crystal head".

Specifically, as shown in fig. 6, the input interface 10 transmits a voltage of 5V to the control sub-circuit 41, the potential of the first node N1 is lower than the voltage transmitted by the input interface 10 coupled to the cathode of the second diode D2, and the second diode D2 is turned off. And, the low level signal transmitted by the channel configuration pin CC of the first transmission interface 20 is smaller than the potential of the first node N1, and the first diode D1 is turned on. Thus, the voltage at the control electrode of the first transistor Q1 in the first stage sub-circuit 42 is smaller than the voltage at the first electrode, the first transistor Q1 is turned on, and the first stage sub-circuit 42 is turned on, so that the first electrode of the first transistor Q1 is coupled to the 5V voltage for transmission to the second transmission interface 30.

Thus, the second transmission interface 30 is connected to the code scanning integrated machine, although the first stage sub-circuit 42 and the second stage sub-circuit 43 both have voltage transmission to the second transmission interface 30, since the first transmission interface 20 is coupled to the Type-C ethernet module interface, the first transmission interface 20 is mainly used as an interface for transmitting data signals, and the charging seat 100 charges the code scanning integrated machine through the 5V voltage transmitted by the input interface 20.

Based on the connection relation that the first transmission interface 20 is connected with the Type-C and is converted into the Ethernet module, the second transmission interface 30 can transmit data signals to the first transmission interface 20, and then the data signals are transmitted to corresponding electronic equipment (computer) through the interface of the Type-C and is converted into the Ethernet module, for example, the scanning integrated machine transmits scanned two-dimension code picture information to the computer, so that the computer can conveniently perform image recognition and networking operation. Or, the first transmission interface 20 transmits the data signal transmitted through the interface of the Type-C to ethernet module to the second transmission interface 30, and then transmits the data signal to the code scanning all-in-one machine through the second transmission interface 30. For example, the computer transmits the image information of the cashing code to the code scanning integrated machine, and the code scanning integrated machine displays the cashing code so that the user can pay by scanning the cashing code.

Third case: as shown in fig. 5, the input interface 10 of the cradle 100 does not receive 12V voltage. And, the first transmission interface 20 is connected to a computer or a power adapter. Here, the computer or the power adapter plays a role of supplying power. The Type of the first transmission interface 20 is a Type-C interface. The bus pin VBUS of the first transmission interface 20 transmits a 5V voltage, and the channel configuration pin CC includes a pull-up resistor and transmits a high level voltage signal.

Specifically, as shown in fig. 6, the dual-role selection circuit 40 has no 5V input to the input interface 10, and the second stage sub-circuit 43 is turned off. In the control sub-circuit 41, the high level signal transmitted by the channel configuration pin CC of the first transmission interface 20 is greater than the potential of the first node N1, and the first diode D1 is turned off. One end of the third resistor R3 is grounded GND, and the voltage of the control electrode of the first transistor Q1 in the first stage subcircuit 42 is pulled down, the voltages of the control electrode and the first electrode of the first transistor Q1 satisfy the transistor on condition, the first stage subcircuit 42 is turned on, so that the first electrode of the first transistor Q1 is coupled with the 5V voltage to be transmitted to the second transmission interface 30.

Thus, the second transmission interface 30 is connected with the code scanning integrated machine, the first-stage sub-circuit 42 has voltage transmission to the second transmission interface 30, the charging seat 100 is used as a master device, the code scanning integrated machine is used as a slave device, and the charging seat 100 charges the code scanning integrated machine.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

Although the application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A charging stand, comprising:

an input interface configured to transmit a first voltage signal;

a first transmission interface configured to transmit a second voltage signal and a data signal;

a second transmission interface configured to transmit an operating voltage and a data signal;

A dual role selection circuit coupled to the input interface, the first transmission interface, and the second transmission interface; the dual-role selection circuit comprises a control sub-circuit, a first stage sub-circuit and a second stage sub-circuit;

the control sub-circuit is respectively coupled with the input interface and the first transmission interface; in the case that the input interface and/or the first transmission interface output valid signals, the control sub-circuit is turned on in response to signals transmitted by the input interface and outputs the second voltage signals of the first transmission interface;

the first stage subcircuit is coupled with the control subcircuit, the first transmission interface, and the second transmission interface; in the case that the control sub-circuit outputs a second voltage signal, the first stage sub-circuit is configured to output the voltage of the first transmission interface to the second transmission interface under the common control of the control sub-circuit and the first transmission interface;

the second stage subcircuit is coupled with the input interface and the second transmission interface; in the case that the input interface outputs the first voltage signal, the second stage sub-circuit is configured to transmit the voltage carried by the first voltage signal to the second transmission interface under the control of the first voltage signal.

2. The cradle of claim 1, wherein the first transmission interface comprises a bus pin and a channel configuration pin;

the control sub-circuit is coupled with the channel configuration pin; the first stage subcircuit is coupled with the bus pin; the voltage transmitted by the channel configuration pin and the bus pin of the first transmission interface is related to the equipment connected with the first transmission interface;

under the condition that the input interface does not output the first voltage signal, the voltage transmitted by the channel configuration pin and the voltage transmitted by the bus pin are controlled together to conduct the first-stage subcircuit or to switch off the first-stage subcircuit; and under the condition that the first stage subcircuit is conducted, outputting the voltage transmitted by the bus pin of the first transmission interface to the second transmission interface.

3. The cradle of claim 1, wherein the control sub-circuit comprises a first diode, a second diode, and a third resistor;

one end of the first diode is coupled with a channel configuration pin of the first transmission interface, and the other end of the first diode is coupled with a first node;

one end of the second diode is coupled with the input interface, and the other end of the second diode is coupled with the first node;

One end of the third resistor is coupled with the input interface, and the other end of the third resistor is grounded;

wherein the first node is coupled to the first stage subcircuit.

4. The cradle of claim 3, wherein said first stage subcircuit comprises a first transistor, a first resistor, and a first capacitor;

a first pole of the first transistor is coupled to a second node, a second pole of the first transistor is coupled to a third node, and a control pole of the first transistor is coupled to the first node;

one end of the first resistor is coupled with the second node, and the other end of the first resistor is coupled with the first node;

one end of the first capacitor is coupled with the second node, and the other end of the first capacitor is coupled with the first node;

wherein the second node is coupled to a bus pin of the first transmission interface; the third node is coupled with the second transmission interface.

5. The cradle of claim 4, wherein said second stage subcircuit comprises a switch subcircuit and a charging subcircuit;

the switch sub-circuit is coupled with the input interface and a fourth node and is configured to control whether the voltage transmitted by the input interface is transmitted to the fourth node;

The charging sub-circuit is coupled to the fourth node, the second transmission interface, and the input interface, and is configured to transmit the first voltage signal to the second transmission interface under the combined action of the voltage of the fourth node and the first voltage signal.

6. The cradle of claim 5, wherein the switch sub-circuit comprises a third transistor, a fourth resistor, and a fifth resistor;

a first electrode of the third transistor is grounded, a second electrode of the third transistor is coupled with the fourth node, and a control electrode of the third transistor is coupled with a fifth node;

one end of the fourth resistor is coupled with the input interface, and the other end of the fourth resistor is coupled with the fifth node;

one end of the fifth resistor is grounded, and the other end of the fifth resistor is coupled with the fifth node.

7. The cradle of claim 6, wherein said charging subcircuit comprises a second transistor, a second resistor, and a second capacitor;

a first pole of the second transistor is coupled to the input interface, a second pole of the second transistor is coupled to the second transmission interface, and a control pole of the second transistor is coupled to the fourth node;

One end of the second resistor is coupled with the input interface, and the other end of the second resistor is coupled with the fourth node;

one end of the second capacitor is coupled with the input interface, and the other end of the second capacitor is coupled with the fourth node.

8. The cradle according to any one of claims 1 to 7, wherein said input interface comprises:

and the voltage reduction and stabilization sub-circuit is coupled with the dual-role selection circuit, and is configured to perform voltage reduction and stabilization processing on the voltage received by the input interface and transmit the voltage to the dual-role selection circuit.

9. The cradle of claim 7, wherein the first transistor and the second transistor are field effect transistors;

the third transistor is a triode.

10. The cradle of claim 1, wherein said cradle further comprises:

a housing; the dual-role selection circuit is arranged in the shell; the shell is provided with the input interface, the first transmission interface and the second transmission interface, and the jack of the input interface, the jack of the first transmission interface and the jack of the second transmission interface are exposed outside the shell.