Interface circuit, charging box, intelligent wearable device and intelligent wearable device assembly

Abstract

The invention discloses an interface circuit, a charging box, an intelligent wearable device and an intelligent wearable device assembly, and relates to the technical field of intelligent wearable devices, the interface circuit comprises an interface, a control module, M functional modules and a switch array, and the interface is provided with N connecting ends for accessing an external terminal; a plurality of first ends of the switch array are respectively connected with the N connecting ends, and a plurality of second ends of the switch array are respectively connected with the M functional modules; m is a positive integer greater than 1, N is a positive integer greater than or equal to 1, and M is greater than N; the control module controls the switch array to act so as to conduct a path between any function module and one connecting end; and the function module receives data output by the external terminal or outputs the data to the external terminal through the switch array and the corresponding connecting end. The invention aims to improve the limitation that the intelligent wearable device needs to be disassembled during debugging and measurement, improve the operation convenience, shorten the software upgrading and troubleshooting period and improve the research and development and after-sales maintenance efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent wearable devices, and in particular to an interface circuit, a charging box, an intelligent wearable device and an intelligent wearable device assembly. BACKGROUND

[0002] Intelligent wearable devices have been widely applied in many fields such as industrial maintenance, medical assistance, education training, remote collaboration and consumer entertainment. In the process of research and development and production, in order to facilitate hardware debugging, signal measurement and software function verification, a development prototype usually reserves a debugging interface on a circuit board, so that an engineer can quickly access a debugging tool to perform fault positioning and performance optimization. However, when the product is completed after the whole machine is packaged, for example, when it enters the mass production stage, these debugging interfaces are often covered by structural parts, shells or sealing materials, and cannot be directly debugged and measured. Once the finished product device has problems such as software abnormalities, system crashes or function failures during the development verification, user trial or after-sales stage, the technical personnel have to expose the internal debugging interface by disassembling the whole machine. This process not only consumes time and effort, but also has a high risk of secondary damage. In addition, it also prolongs the software upgrade and troubleshooting cycle, and increases the research and development and after-sales maintenance cost. SUMMARY

[0003] The main purpose of the present application is to provide an interface circuit, a charging box, an intelligent wearable device and an intelligent wearable device assembly, aiming to improve the limitation of disassembling the machine when debugging and measuring the intelligent wearable device, improve the operation convenience, shorten the software upgrade and troubleshooting cycle, and improve the research and development and after-sales maintenance efficiency.

[0004] To achieve the above-mentioned purpose, the present application provides an interface circuit, which comprises: an interface, the interface having N connection ends, the interface being configured to access an external terminal through the connection ends; a control module; M function modules, the M function modules being respectively electrically connected with the control module; a switch array, a plurality of first ends of the switch array being respectively electrically connected with the N connection ends, and a plurality of second ends of the switch array being respectively electrically connected with the M function modules; wherein M is a positive integer greater than 1, N is a positive integer greater than or equal to 1, and M is greater than N; the control module being configured to control the switch array to act, so as to turn on a path between any of the function modules and the connection ends; the function module being configured to receive data output by the external terminal or output data to the external terminal through the switch array and the corresponding connection ends.

[0005] In an embodiment, the M function modules at least include any two of the following: an information output module electrically connected to a second end of the switch array, the information output module configured to output log information data to an external terminal via the switch array and the corresponding connection end; an upgrade module electrically connected to a second end of the switch array, the upgrade module configured to receive software upgrade data output by an external terminal via the switch array and the corresponding connection end; an audio module electrically connected to a second end of the switch array, the audio module configured to receive audio data output by an external terminal via the switch array and the corresponding connection end, and / or output audio data to an external terminal.

[0006] In an embodiment, the audio module comprises: an audio input module electrically connected to a second end of the switch array, the audio input module configured to receive audio data output by an external terminal via the switch array and the corresponding connection end and output to the control module; an audio output module electrically connected to a second end of the switch array, the audio output module configured to output audio data to an external terminal via the switch array and the corresponding connection end.

[0007] In an embodiment, the switch array comprises: a first switch circuit having a first end and a plurality of second ends, the first end of the first switch circuit electrically connected to any one of the N connection ends; a second switch circuit having a first end and a plurality of second ends, the first end of the second switch circuit electrically connected to a second end of the first switch circuit, a second end of the second switch circuit electrically connected to the information output module, and another second end of the second switch circuit electrically connected to the upgrade module; a third switch circuit having a first end and a plurality of second ends, the first end of the third switch circuit electrically connected to another second end of the first switch circuit, a second end of the third switch circuit electrically connected to the audio input module, and another second end of the third switch circuit electrically connected to the audio output module.

[0008] In an embodiment, the interface comprises a charging interface.

[0009] The present application also provides a charging case comprising the interface circuit as described in any one of the above embodiments.

[0010] In an embodiment, the charging box comprises a power storage module and a charging seat for placing the smart wearable device, the interface further comprises a charging connection end, and the interface circuit comprises: a charging module electrically connected with the charging connection end, the charging seat and the power storage module respectively; the charging module is configured to receive an output voltage of the power storage module and output a corresponding power supply voltage to the smart wearable device through the charging seat, and receive an external power supply voltage through the charging connection end and output to the smart wearable device and the power storage module through the charging connection end and the charging seat.

[0011] In an embodiment, the interface circuit comprises: a communication module having a communication end for communicatively connecting with the smart wearable device; the control module is configured to output software upgrade data to the smart wearable device through the communication end, so that the smart wearable device is upgraded according to the software upgrade data.

[0012] The application further provides a smart wearable device comprising the interface circuit according to any one of the above.

[0013] The application further provides a smart wearable device assembly comprising the charging box according to any one of the above, and / or comprising the smart wearable device according to the above.

[0014] In actual application, the interface circuit provided by the application can realize data receiving or sending without disassembling the smart wearable device, only by establishing electrical connection between the external terminal and the interface, thereby completing operations such as upgrading and fault diagnosis of the smart wearable device. In this way, the limitation of disassembling the smart wearable device when debugging and measuring the smart wearable device is improved, the operation convenience is improved, the software upgrade and fault diagnosis period is shortened, the research and development and after-sales maintenance efficiency are improved, and the research and development and after-sales maintenance cost is reduced. In addition, a plurality of functions can be realized through one physical interface, and the switch array can improve the problem of insufficient interface connection ends. When the number of available pins of the interface is small, the switch array reduces the demand for the number of pins, breaks through the limitation of interface pin resources, and improves the practicability and flexibility of the interface circuit. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one embodiment consistent with the application and, together with the description, serve to explain the principles of the application.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0017] Figure 1 The functional module schematic diagram provided by an embodiment of the interface circuit of the present application; Figure 2 The functional module schematic diagram provided by another embodiment of the interface circuit of the present application; Figure 3 The functional module schematic diagram provided by still another embodiment of the interface circuit of the present application; Figure 4 The functional module schematic diagram provided by yet another embodiment of the interface circuit of the present application; Figure 5 The circuit schematic diagram of the interface system of the intelligent wearable device in the related art; Figure 6 The circuit schematic diagram provided by an embodiment of the interface circuit of the present application; Figure 7 The functional module schematic diagram provided by another embodiment of the interface circuit of the present application; Figure 8 The functional module schematic diagram provided by still another embodiment of the interface circuit of the present application.

[0018] Explanation of the reference numerals: 10, interface; 20, control module; 30, functional module; 40, switch array; 50, charging module; 60, communication module; 31, information output module; 32, upgrading module; 33, audio module; 34, audio input module; 35, audio output module; 41, first switch circuit; 42, second switch circuit; 43, third switch circuit.

[0019] The purposes, functional features and advantages of the present application will be further illustrated in combination with the embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are merely intended to explain the technical solutions of the present application, and are not used to limit the present application.

[0021] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings in the specification and the specific embodiments.

[0022] Smart wearable devices have been widely applied in many fields such as industrial maintenance, medical assistance, education training, remote collaboration and consumer entertainment. In the process of research and development and production, in order to facilitate hardware debugging, signal measurement and software function verification, the development prototype usually reserves a debugging interface 10 or a test pad on the circuit board, so that engineers can quickly access the debugging tool to locate faults and optimize performance. However, when the product is completed after the whole machine is packaged, for example, when it enters the mass production stage, these debugging interfaces 10 are often covered by structural parts, shells or sealing materials, and cannot be directly debugged and measured. Once the finished product device has problems such as software abnormalities, system crashes or function failures during the development verification, user trial or after-sales stage, the technical personnel have to expose the internal debugging interface 10 by disassembling the whole machine, and then implement program burning, log reading or signal detection operations. This process not only consumes time and effort, but also has a high risk of secondary damage, such as damaging precision optical components, damaging the sealing structure to reduce waterproof performance, or causing structural part breakage due to improper disassembly. In addition, frequent disassembly may affect the consistency and reliability of the product, prolong the software upgrade and troubleshooting cycle, and increase the research and development and after-sales maintenance costs.

[0023] In related technologies, when a smart wearable device needs to implement multiple functions, multiple corresponding function modules 30 are usually configured, and multiple independent interfaces 10 are set for these modules to perform data transmission, debugging and other operations. This scheme uses a large number of interfaces 10, which not only occupies limited device space, but also significantly increases the risk of water entering and moisture during use of the device through the interfaces 10, thereby reducing the environmental adaptability and overall reliability of the product. Therefore, another approach is to reduce the number of interfaces 10, and two or more function modules 30 share different pins connected to the same physical interface 10. Although this way reduces the number of external interfaces 10 to some extent, it puts higher requirements on the number of interface 10 pins, which easily leads to pin resource shortage, reduced adaptability and flexibility.

[0024] Therefore, with reference to Figure 1 , the present application provides an interface circuit, which comprises: an interface 10, the interface 10 has N connection ends, the interface 10 is used for accessing an external terminal through the connection ends; a control module 20; M function modules 30, the M function modules 30 are respectively electrically connected with the control module 20; a switch array 40, a plurality of first ends of the switch array 40 are respectively electrically connected with the N connection ends, a plurality of second ends of the switch array 40 are respectively electrically connected with the M function modules 30; wherein, M is a positive integer greater than 1, N is a positive integer greater than or equal to 1, and M is greater than N; The control module 20 is configured to control the switch array 40 to turn on a path between any of the functional modules 30 and the connection terminal. The functional module 30 is configured to receive data output by an external terminal or output data to the external terminal via the switch array 40 and the corresponding connection terminal.

[0025] In the embodiment, the control module 20 can be implemented by a main controller such as an MCU (MicroController Unit), an FPGA (Field Programmable Gate Array), a PLC (Programmable Logic Controller), a DSP (Digital Signal Process), a SOC (System On Chip), etc. The interface 10 can be a charging interface and a power supply interface 10, etc. The charging interface or the power supply interface 10 can be implemented by a USB Type-C interface 10, a Micro-USB interface 10, a Pogo Pin interface 10, etc. The switch array 40 can be implemented by a MUX / DEMUX combination, an analog switch array 40, a relay switch array 40, etc.

[0026] In the embodiment, the external terminal includes but is not limited to a mobile phone, a tablet, a computer, etc.

[0027] In the embodiment, the smart wearable device includes but is not limited to AR glasses, a smart bracelet, a smart watch, a smart earphone, etc.

[0028] It should be noted that the interface circuit can be applied to the smart wearable device. A technician can output data to the interface circuit of the smart wearable device by the external terminal, so that the corresponding functional module 30 receives the data output by the external terminal via the connection terminal of the interface 10 and the switch array 40. For example, the functional module 30 includes an upgrade module 32. The upgrade module 32 can output the data output by the external terminal received via the connection terminal and the switch array 40 to the control module 20, so that the control module 20 upgrades the smart wearable device according to the data output by the external terminal.

[0029] Optionally, the interface circuit can also be applied to a charging box providing charging and storage functions, the charging box having a charging seat and a storage cavity for accommodating the smart wearable device, in the case that the smart wearable device is placed in the storage cavity, the charging interface of the smart wearable device is electrically connected with the charging seat, and the energy storage module inside the charging box outputs a voltage to the charging seat through the power supply interface 10 of the charging box to supply power to the smart wearable device. It can be understood that the power supply interface 10 can also have a data transmission function, so that when the smart wearable device is placed in the storage cavity, the charging box can output the data received from the external terminal to the smart wearable device through the power supply interface 10. Optionally, the interface circuit of the charging box can also be provided with a communication module 60 specially used for communication with the smart wearable device to realize the data transmission function. In order to reduce the size and space of the charging box or the smart wearable device, the charging interface and the power supply interface 10 can be integrated in the same interface 10.

[0030] In this embodiment, the interface circuit is arranged in the charging box, and the AR glasses are taken as an example of the smart wearable device. When the technical personnel such as R&D or after-sales need to upgrade the AR glasses, the AR glasses can be first placed in the storage cavity of the charging box, so that the charging interface of the smart wearable device is electrically connected with the charging seat; or the AR glasses do not need to be placed in the storage cavity, but only need to be communicatively connected with the charging box through the internal communication module 60. The technical personnel can output the software upgrade data to be upgraded from the external terminal to the interface 10, so that the upgrade module 32 receives the software upgrade data output from the external terminal through the switch array 40 and the corresponding connection end, and outputs the software upgrade data to the control module 20, so that the control module 20 outputs the software upgrade data to the smart wearable device through the communication module 60 or the charging interface, so that the controller of the smart wearable device upgrades itself according to the instructions corresponding to the software upgrade data.

[0031] In this embodiment, when the AR glasses or the charging box fails, the technical personnel can receive the corresponding log information data through the external terminal to obtain the corresponding log information, so as to quickly locate the problem and solve the corresponding problem. It can be understood that the functional module 30 can also include an information output module 31 for storing the log information of the charging box and / or the smart wearable device and outputting the corresponding log information data. For example, when the charging box fails, the technical personnel can electrically connect the interface 10 with the external terminal and output the corresponding fault information request signal, so that the control module 20 controls the switch array 40 to turn on the electrical connection path between the information output module 31 and the corresponding connection end, and controls the information output module 31 to output the log information data when the interface 10 receives the fault information request signal. In this way, the technical personnel can print the log information through the interface 10 and send it to the R&D end to timely locate the problem and solve it.

[0032] It should be noted that the smart wearable device components (including the charging box and the smart wearable device) are limited by the device miniaturization, thinning trend, and the physical space is extremely limited. The traditional design usually adopts multiple independent interfaces 10 to realize charging, firmware upgrade, log export, sensor calibration and other functions, and the number of interfaces 10 is large, and the circuit board occupies a large area. The interface circuit proposed in the present application can realize multi-module connection through a single interface 10, reduce the number of interfaces 10, and improve the integration and flexibility.

[0033] In actual application, the interface circuit proposed in the present application does not need to disassemble the smart wearable device, only needs to establish an electrical connection between the external terminal and the interface 10, and can realize data receiving or sending, so as to complete the upgrade and fault diagnosis of the smart wearable device and other operations. In this way, the limitation of disassembling the machine when debugging and measuring the smart wearable device is improved, the operation convenience is improved, the software upgrade and fault troubleshooting period is shortened, the research and development and after-sales maintenance efficiency are improved, and the research and development and after-sales maintenance cost is reduced. In addition, a physical interface 10 can realize multiple functions, and the setting of the switch array 40 can improve the problem of insufficient connection ends of the interface 10. When the number of available pins of the interface 10 is small, the switch array 40 reduces the demand for the number of pins, breaks through the limitation of the pin resources of the interface 10, and improves the practicability and flexibility of the interface circuit of the present application.

[0034] In another embodiment, referring to Figure 2 , the M function modules 30 at least include any two of the following: The information output module 31 is electrically connected with a second end of the switch array 40, and the information output module 31 is used for outputting log information data to an external terminal through the switch array 40 and the corresponding connection end; The upgrade module 32 is electrically connected with a second end of the switch array 40, and the upgrade module 32 is used for receiving software upgrade data output by an external terminal through the switch array 40 and the corresponding connection end; The audio module 33 is electrically connected with a second end of the switch array 40, and the audio module 33 is used for receiving audio data output by an external terminal through the switch array 40 and the corresponding connection end, and / or outputting audio data to an external terminal.

[0035] In this embodiment, the functional module 30 may include any two or three of the upgrade module 32, the information output module 31, and the audio module 33. The information output module 31 is specifically implemented using a DEBUG UART module, supporting the standard UART serial communication protocol. It can store various log information data such as the smart wearable device's operation logs, software running status, and fault / anomaly records, helping technicians obtain log information data for debugging or fault diagnosis. The upgrade module 32 is used to receive software upgrade data output from an external terminal. Specifically, it can be implemented using an SWD module. When an upgrade of the smart wearable components is required, software upgrade data can be output through an external terminal. The SWD module receives the software upgrade data via the switch array 40 and the corresponding connection terminal and outputs it to the control module 20 to upgrade the smart wearable device components, allowing the smart wearable device to be flashed with the latest firmware version.

[0036] refer to Figure 3 The audio module 33 includes: An audio input module 34 is electrically connected to a second terminal of the switch array 40. The audio input module 34 is used to receive audio data output from an external terminal and output it to the control module 20 via the switch array 40 and the corresponding connection terminal. An audio output module 35 is electrically connected to a second terminal of the switch array 40. The audio output module 35 is used to output audio data to an external terminal via the switch array 40 and the corresponding connection terminal.

[0037] In this embodiment, the audio input module 34 can be implemented using a circuit consisting of an analog-to-digital converter and a preamplifier circuit to acquire external audio signals. These external audio signals can come from an external microphone or pickup device. The audio input module 34 enables the smart wearable device component to have a microphone function, enabling voice recognition, call noise reduction, and ambient sound analysis. The audio output module 35 can be implemented using a digital-to-analog converter and an audio amplifier circuit to output audio signals. The audio output module 35 enables the smart wearable device component to have a voice assistant (SPK) function, supporting external headphones and miniature speakers for playing prompts, voice assistant feedback, navigation commands, etc.

[0038] It should be noted that technicians can quickly locate fault information through the Log information output by the information output module 31; perform offline upgrades through the upgrade module 32; and perform audio function tests through the audio module 33, such as verifying call quality, voice wake-up rate, and spatial audio effects.

[0039] In this embodiment, the smart wearable device has serial port debugging function, SWD upgrade function, SPK function and MIC function at the same time. Correspondingly, the number of connection ends of the interface 10 should be less than 4. In this embodiment, in order to reduce the pin requirements of the interface 10, a multi-blade multi-pole switch can be used as the switch array 40, including two input ends and at least four output ends, wherein the two input ends of the multi-blade multi-pole switch are electrically connected one by one with two pins (connection ends) of the interface 10 to transmit data and clock signals, and the four output ends are electrically connected with the information output module 31, the upgrade module 32, the audio input module 34 and the audio output module 35 respectively. It should be noted that the input end and the output end of the multi-blade double-pole switch do not represent the flow direction of the signal, but are only used for differentiation.

[0040] Optionally, the control module 20 can identify whether the external terminal is connected and judge the device type of the external terminal through pin level, impedance, voltage detection and other methods, to control the switch array 40, so that the switch array 40 acts to turn on the electrical connection path between the corresponding function module 30 and the interface 10 connection end.

[0041] Optionally, the control module 20 also has the function of communicating with the external terminal through a preset communication channel, identifying the function type, etc. For example, the control module 20 sends a specific character or detects whether there is a data stream to judge whether it is a debugging terminal, or the control module 20 periodically scans the bus as a master device, and if a response is received, it is judged that the device connected supports the protocol. For example, the control module 20 periodically attempts to establish a UART connection, and if there is a response, the DEBUG function is enabled.

[0042] Optionally, the control module 20 can be set to a passive trigger mode. That is, the user informs the control module 20 of the type of the external terminal connected and the next work content. For example, a plurality of keys are provided on the charging box, when the user connects the external terminal, the corresponding key is pressed, and the corresponding trigger signal is output to the control module 20, so that the control module 20 controls the switch array 40 to act. For example, the user presses the "upgrade key", the control module 20 enters the SWD mode, and controls the upgrade module 32 and the switch array 40 to work.

[0043] The present embodiment takes the need of a technician to test the audio function of an assembled smart wearable device as an example for illustration. The technician can electrically connect a speaker or earphone device to the interface 10. When the control module 20 identifies that the accessed external terminal is a speaker or earphone device, it enters the SPK function, and controls the single-pole multi-throw switch to turn on the electrical connection path between the output end electrically connected to the audio output module 35 and the input end itself. In this way, the control module 20 can output an audio signal through the audio output module 35 (SPK module), so that the speaker or earphone device makes a sound. If the technician electrically connects a microphone or sound pickup device to the interface 10, and the control module 20 identifies that the accessed external terminal is a microphone or sound pickup device, it enters the MIC function, and controls the multi-pole multi-throw switch to turn on the electrical connection path between the output end electrically connected to the audio input module 34 and the corresponding input end. In this way, the control module 20 can receive the audio signal output by the microphone or sound pickup device through the audio input module 34 (MIC module), realizing audio acquisition.

[0044] A variety of functions are realized through fewer interface 10 pins, saving the number of pins. Without disassembly, functions such as upgrading, debugging, and audio testing can be realized, improving convenience, shortening the development and after-sales cycle, and improving work efficiency. In addition, if more functions of the smart wearable device are to be realized, only the switch logic needs to be configured on the software, without the need to add interface 10 components, improving flexibility.

[0045] Reference Figure 5 , Figure 5 The interface circuit of the prior art, in which the information output module 31 (DEBUG UART), the upgrading module 32 (SWD), the audio input module 34 (MIC), and the audio output module 35 (SPK) are respectively accessed to external devices through different interfaces 10, has many interface 10 pins and occupies a large space, which is not conducive to the miniaturization design of the smart wearable device.

[0046] In an embodiment, reference Figure 4 , the switch array 40 includes: a first switch circuit 41 having a first end and a plurality of second ends, the first end of the first switch circuit 41 being electrically connected to any one of the N connection ends; a second switch circuit 42 having a first end and a plurality of second ends, the first end of the second switch circuit 42 being electrically connected to one of the second ends of the first switch circuit 41, one of the second ends of the second switch circuit 42 being electrically connected to the information output module 31, and another of the second ends of the second switch circuit 42 being electrically connected to the upgrading module 32; A third switch circuit 43 has a first end and a plurality of second ends, the first end of the third switch circuit 43 is electrically connected to another second end of the first switch circuit 41, one second end of the third switch circuit 43 is electrically connected to the audio input module 34, and another second end of the second switch circuit 42 is electrically connected to the audio output module 35.

[0047] In the embodiment, the first switch circuit 41, the second switch circuit 42 and the third switch circuit 43 can be realized by using MOS tubes, IGBTs and other switch tubes, or realized by using relays, contactors and other switch devices, and can also be realized by using single-pole double-throw switches, single-pole multi-throw switches, multi-pole multi-throw switches and the like.

[0048] In the embodiment, the first switch circuit 41 is realized by using a double-pole double-throw switch, the second switch circuit 42 and the third switch circuit 43 are realized by using single-pole double-throw switches. Referring to Figure 6 , the MCU is the control module 20, SWITCH1 is the first switch circuit 41, the second end of which is 11 and 12, SWITCH2 is the second switch circuit 42, the second end of which is 21 and 22, and SWITCH3 is the third switch circuit 43, the second end of which is 310 and 320. In the embodiment, the switch logic of the switch array 40 can be preset by the R&D personnel to achieve the effect of multi-functional multiplexing.

[0049] Taking the AR glasses as an example, during the development of the AR glasses, various function debugging and optimization will be performed, and the software developers can print log information through the DEBUG UART module to quickly locate the problem and solve the corresponding problem. In addition, when the user end encounters product failure during use, the maintenance personnel can also print log information through the DEBUG UART module when they come to repair, and then send the log information to the R&D end through an external terminal to timely locate the problem and solve it.

[0050] In the embodiment, the switch logic table for realizing the serial port DEBUG function is shown in Table 1: Table 1

[0051] In the embodiment, the interface 10 module can include a charging interface having a charging connection end, and the charging interface can receive an external voltage and output it to an internal energy storage module or a battery of the AR glasses. Referring to Figure 6, Type-C SBU1 / 2 interface is a charging interface, the control end IO1 of the MCU is used for outputting a corresponding control signal to the controlled end of SWITCH1; the control end IO2 of the MCU is used for outputting a corresponding control signal to the controlled end of SWITCH2; the control end IO3 of the MCU is used for outputting a corresponding control signal to the controlled end of SWITCH3. As shown in Table 1, the MCU can control the control ends IO1 and IO2 to be high level, and the signal transmission path is: the MCU controls the DEBUG UART module to output the DEBUG RX / DEBUG TX serial port signal, enters the passage 21 of SWITCH2, enters the passage 11 of SWITCH1, and then outputs the serial port signal to the external terminal through the Type-C SBU1 / 2 interface through the passage 1. The technician can obtain the log information through the external terminal.

[0052] In another embodiment, when the product performance of the AR glasses needs to be optimized, upgrading is needed. Taking the case that the interface circuit is provided with a charging box and the AR glasses need to be upgraded as an example, it is explained that the AR glasses and the charging box can both have the communication module 60 to realize the communication connection between the two.

[0053] In the embodiment, the switch logic table for realizing the SWD function is shown in Table 2: Table 2

[0054] As shown in Table 2, the technician can output corresponding software upgrade data to the interface 10 through the external terminal, the MCU can control IO1 to be high level and IO2 to be low level, and the signal transmission path is: the software upgrade data enters the passage 11 of SWITCH1 through the Type-C SBU1 / 2 interface, and then is output to the SWD upgrade module 32 through the passage 22 of SWITCH2. The SWD upgrade module 32 can be output to the control module 20, so that the control module 20 outputs the software upgrade data to the AR glasses through the communication module 60, the controller of the AR glasses performs software upgrade according to the software upgrade data, and the product performance is optimized.

[0055] Alternatively, in the embodiment, the interface 10 can also be a charging interface, and has the functions of charging and data transmission. Thus, when the AR glasses need to be upgraded, the AR glasses are placed in the charging box. The MCU can control IO1 to be high level and IO2 to be low level, and the signal transmission path is: the MUC controls the SWD upgrade module 32 to output the software upgrade data, and then the software upgrade data is output to the AR glasses through the Type-C SBU1 / 2 interface through the passage 22 of SWITCH2 and the passage 11 of SWITCH1.

[0056] In this embodiment, the switch logic table for implementing the SPK function is shown in Table 3: Table 3

[0057] As shown in Table 3, the MCU controls IO1 to be at a low level and IO3 to be at a high level, and the signal transmission path is as follows: The MCU outputs an audio signal through the SPK module, enters path 12 of SWITCH1 through path 310 of SWITCH3, and outputs the audio signal to an external speaker or earphone device through path 1 of Type-C SBU1 / 2 interface, thereby realizing external SPK sound generation. In this way, a technician can test the audio output function of the smart wearable device through the speaker and earphone device.

[0058] In this embodiment, the switch logic table for implementing the MIC function is shown in Table 4: Table 4

[0059] As shown in Table 4, the MCU controls IO1 and IO3 to be at a low level, and the signal transmission path is as follows: after an external microphone or other sound pickup device picks up sound, the sound enters path 1 of Type-C SBU1 / 2 interface, enters path 12 of SWITCH1, enters SWITCH3, and then enters the MCU through path 320 of SWITCH3, thereby completing audio data input and processing operations. In this way, the audio input function of the smart wearable device can be tested.

[0060] In this way, compared with the related art in which a switch circuit and an interface 10 are respectively provided for multiple function modules 30, the number of interfaces 10 and switches is significantly reduced; through switch logic configuration, the function of the Type-C interface 10 is enriched, and multi-functional reuse can be achieved only by using the SBU1 / 2 pin. Moreover, by using the Type-C interface 10, log information and software upgrade data required for serial debugging are outputted / entered through the interface 10, thereby improving the limitation problem in the related art that the whole machine needs to be disassembled for debugging and upgrading. In this way, the convenience of debugging and measuring the smart wearable device is improved, the software upgrade and troubleshooting cycle is shortened, and the research and development and after-sales maintenance efficiency are improved.

[0061] The application further provides a charging box comprising the interface circuit as described above.

[0062] In an embodiment, referring to Figure 7 , the interface 10 comprises a charging interface, the charging box comprises an energy storage module and a charging seat for placing the smart wearable device, the charging interface comprises a charging connection end, and the interface circuit comprises: A charging module 50 is electrically connected with the charging connection end, the charging seat and the energy storage module respectively; The charging module 50 is configured to receive an output voltage of the energy storage module and output a corresponding power supply voltage to the smart wearable device through the charging seat, and is configured to receive an external power supply voltage through the charging connection end and output to the smart wearable device and / or the energy storage module through the charging connection end and the charging seat.

[0063] In the embodiment, referring to Figure 6 , the charging module 50 can include a charging IC, an overvoltage protection module, a battery power detection module, a DC-DC module, an overvoltage / overcurrent protection module, etc. The charging box also includes a key, a switch detection module and an indicator light, etc. Among them, the switch detection module can be a Hall switch, which detects the opening and closing state of the box cover or whether the AR glasses are placed in the storage cavity; the indicator light is used to display charging status, communication status, fault alarm and other information.

[0064] It should be noted that when the AR glasses are low in power, they can be placed in the storage cavity of the charging box. At this time, the charging interface of the AR glasses is electrically connected with the charging seat, and the energy storage module (such as a battery) of the charging box can output a voltage to the charging module 50, so that the charging module 50 outputs a power supply voltage to the battery of the AR glasses through the charging seat, and the AR glasses are charged. In addition, when the AR glasses are low in power, the charging box can also access an external power supply voltage through the charging interface, and output the power supply voltage to the battery of the AR glasses after processing, so as to charge it. As Figure 6 shown, the power socket as the charging interface can receive an external power supply voltage provided by an external energy storage module and a power grid, so that the charging IC receives and outputs to the DC-DC module for rectification processing, and then outputs to the charging socket, so as to charge the battery of the smart wearable device. In combination with the above embodiment, the charging socket is a power supply interface 10 for charging the AR glasses, the power socket is a charging interface for charging the charging box and / or the AR glasses, and the power supply interface 10 and the charging interface can be integrally arranged. At the same time, the charging IC can also output the external power supply voltage received through the charging connection end to the battery of the charging box through the battery power detection module. For example, the battery power detection module includes a voltage detection module and a corresponding switch module. The voltage detection module is used to detect the voltage of the battery inside the charging box to determine the remaining power of the battery, and when the power is insufficient, the switch module turns on the electrical connection path between the charging IC and the battery to charge the battery.

[0065] In actual application, the interface 10 of the interface circuit adopts the charging interface of the charging box, and the SBU1 / 2 pins and the corresponding switch logic originally existing in the charging interface are used to realize the multi-functional multiplexing effect, thereby saving the number of interfaces 10 and pins, and reducing the size and weight of the charging box.

[0066] In an embodiment, referring to Figure 8 , the interface circuit comprises: a communication module 60 having a communication end for communication connection with the smart wearable device; The control module 20 is configured to output software upgrade data to the smart wearable device via the communication end, so that the smart wearable device is upgraded according to the software upgrade data.

[0067] In the embodiment, the communication module 60 can be implemented by using a wired communication module such as a LIN communication module, a CAN communication module, and an RS485 transceiver chip. According to the selection of the communication module 60, the charging box can output signals to the smart wearable device via a bus or a transmission line corresponding to the type of the communication module 60. The communication module 60 can also be implemented by using a wireless communication module such as a WiFi module, a Bluetooth communication module, and a 4G / 5G module. In order to improve the convenience of use for users, in the embodiment, one or more of the wireless communication modules can be selected.

[0068] In combination with the above embodiment, the smart wearable device is taken as a smart earphone as an example for illustration, wherein the smart earphone includes a Bluetooth earphone, a headset, and the like. Correspondingly, the smart earphone is provided with a charging box to charge the smart earphone when the smart earphone is placed in the storage cavity. When the smart earphone malfunctions, a maintenance personnel can access the charging interface of the charging box through an external terminal such as a special test device. Referring to Figure 6When the control module 20 identifies the test equipment, the control module 20 controls the control end IO1 and IO2 of the control module 20 to be high level, and the signal transmission path is: the MCU controls the DEBUG UART module to output the DEBUG RX / DEBUG TX serial port signal, enters the passage 11 of the SWITCH1 through the passage 21 of the SWITCH2, and then outputs the serial port signal to the test equipment through the passage 1 by the Type-C SBU1 / 2 interface, so that the technical personnel can send the log information to the R&D end for remote fault detection, so as to solve the problem in time. When it is necessary to optimize the performance of the intelligent earphone, the relevant technical personnel can access the charging interface of the charging box through the computer and the like external terminal, and send the corresponding software upgrade data. The MCU can identify that the intelligent earphone needs to be upgraded according to the software upgrade data itself, active / passive communication with the external terminal, and the way of receiving the external trigger signal, so that the MCU can control IO1 to be high level and IO2 to be low level, and the signal transmission path is: the software upgrade data enters the passage 11 of the SWITCH1 through the Type-C SBU1 / 2 interface, and then is output to the SWD upgrade module 32 through the passage 22 of the SWITCH2. The SWD upgrade module 32 can be output to the control module 20, so that the control module 20 outputs the software upgrade data to the intelligent earphone through the communication module 60, and the controller of the intelligent earphone performs software upgrade according to the software upgrade data, and optimizes the product performance. It can be understood that when it is necessary to upgrade the related functions of the charging box, after the SWD upgrade module 32 outputs the software upgrade data to the control module 20, the control module 20 can perform software upgrade on the charging box according to the software upgrade data.

[0069] The communication module 60 is arranged, so that the intelligent wearable device does not need to be limited in the charging box when upgrading, and the operation convenience is further improved.

[0070] The charging box provided by the application comprises the interface circuit described above. Compared with the prior art, the charging box provided by the application has the same beneficial effects as the interface circuit provided by the above embodiment, and other technical features of the charging box are the same as the features disclosed in the above embodiment, which will not be repeated here.

[0071] The application further provides an intelligent wearable device, which comprises the interface circuit described above.

[0072] In the embodiment, the intelligent wearable device can comprise AR glasses, a smart bracelet, a smart watch, an intelligent earphone and the like.

[0073] In the embodiment, each functional module 30 of the smart wearable device can receive data output by the external terminal or output data to the external terminal through the switch array 40 and the corresponding connection end. For example, when the performance of the smart wearable device needs to be optimized, the technician outputs software upgrade data to the interface 10 through the external terminal, so that the upgrade module 32 receives the software upgrade data through the switch array 40 and the connection end and outputs the software upgrade data to the control module 20, so that the control module 20 completes the upgrade optimization of the smart wearable device according to the software upgrade data. In combination with the above embodiment, when the audio output function of the smart wearable device needs to be tested, the technician can connect the smart wearable device to an external device such as a loudspeaker or a headset, and the control module 20 controls the audio output module 35 to output an audio signal, so that the audio output module 35 outputs the audio signal to the external device such as the loudspeaker or the headset through the switch array 40 and the corresponding connection end, thereby testing the audio output function.

[0074] In actual application, without disassembling the smart wearable device, only the electrical connection between the external terminal and the interface 10 needs to be established to realize the reception or transmission of data, thereby completing the upgrade and fault diagnosis of the smart wearable device. In this way, the software upgrade and troubleshooting cycle is shortened, the research and development and after-sales maintenance efficiency are improved, and the research and development and after-sales maintenance cost is reduced. In addition, a plurality of functions can be realized through one physical interface 10, and the switch array 40 can solve the problem of insufficient connection ends of the interface 10. When the number of available pins of the interface 10 is small, the switch array 40 reduces the demand for the number of pins, breaks through the limitation of the pin resources of the interface 10, and improves the practicability and flexibility of the smart wearable device.

[0075] The smart wearable device provided by the application comprises the interface circuit described above. Compared with the prior art, the smart wearable device provided by the application has the same beneficial effects as the interface circuit provided by the above embodiment, and other technical features in the smart wearable device are the same as the features disclosed in the above embodiment, which will not be repeated here.

[0076] The application further provides a smart wearable device assembly, which comprises the charging box described in any one of the above embodiments and / or the smart wearable device described above.

[0077] In the embodiment, the smart wearable device assembly can comprise AR glasses, smart headsets and the like smart wearable devices and corresponding charging boxes. The smart wearable device assembly can realize serial debugging, upgrading, audio testing and the like functions of the smart wearable device and the charging box through the charging interface of the charging box, without disassembling the whole machine, thereby shortening the software upgrade and troubleshooting cycle and reducing the research and development and after-sales maintenance cost.

[0078] The smart wearable device assembly provided by the application can be the charging box and / or the smart wearable device described above. Compared with the prior art, the smart wearable device assembly provided by the application has the same beneficial effects as the charging box and / or the smart wearable device provided by the above-mentioned embodiments, and other technical features in the smart wearable device assembly are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0079] The above-mentioned is only part of the embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation made by using the content of the specification and drawings, or direct / indirect application in other related technical fields under the technical concept of the application is included in the patent protection scope of the application.

Claims

1. An interface circuit, characterized by The interface circuit comprises: an interface having N connection terminals, the interface being configured to access an external terminal via the connection terminals; a control module; M functional modules, each of the M functional modules being electrically connected to the control module; a switch array, a plurality of first ends of the switch array being electrically connected to the N connection terminals respectively, and a plurality of second ends of the switch array being electrically connected to the M functional modules respectively; wherein M is a positive integer greater than 1, N is a positive integer greater than or equal to 1, and M is greater than N; the control module is configured to control the switch array to turn on a path between any of the functional modules and any of the connection terminals; the functional module is configured to receive data output by an external terminal or output data to an external terminal via the switch array and the corresponding connection terminal.

2. The interface circuit of claim 1, wherein, The M functional modules at least include any two of the following: an information output module, the information output module being electrically connected to one of the second ends of the switch array, and the information output module being configured to output log information data to an external terminal via the switch array and the corresponding connection terminal; an upgrade module, the upgrade module being electrically connected to one of the second ends of the switch array, and the upgrade module being configured to receive software upgrade data output by an external terminal via the switch array and the corresponding connection terminal; an audio module, the audio module being electrically connected to one of the second ends of the switch array, and the audio module being configured to receive audio data output by an external terminal and / or output audio data to an external terminal via the switch array and the corresponding connection terminal.

3. The interface circuit of claim 2, wherein, The audio module comprises: an audio input module, the audio input module being electrically connected to one of the second ends of the switch array, and the audio input module being configured to receive audio data output by an external terminal and output the audio data to the control module via the switch array and the corresponding connection terminal; an audio output module, the audio output module being electrically connected to one of the second ends of the switch array, and the audio output module being configured to output audio data to an external terminal via the switch array and the corresponding connection terminal.

4. The interface circuit of claim 3, wherein, The switch array comprises: a first switch circuit having a first end and a plurality of second ends, the first end of the first switch circuit being electrically connected to any of the N connection terminals; a second switch circuit having a first end and a plurality of second ends, the first end of the second switch circuit being electrically connected to one of the second ends of the first switch circuit, one of the second ends of the second switch circuit being electrically connected to the information output module, and another of the second ends of the second switch circuit being electrically connected to the upgrade module; a third switch circuit having a first end and a plurality of second ends, the first end of the third switch circuit being electrically connected to another of the second ends of the first switch circuit, one of the second ends of the third switch circuit being electrically connected to the audio input module, and another of the second ends of the third switch circuit being electrically connected to the audio output module.

5. An interface circuit as claimed in any one of claims 1 to 4, characterized in that, The interface comprises a charging interface.

6. A charging case characterized by, The charging box comprises the interface circuit according to any one of claims 1 to 5.

7. The charging case of claim 6, wherein, The charging box comprises an energy storage module and a charging seat for placing the smart wearable device, and the interface further comprises a charging connection end, and the interface circuit comprises: a charging module electrically connected with the charging connection end, the charging seat and the energy storage module respectively; the charging module is configured to receive an output voltage of the energy storage module and output a corresponding power supply voltage to the smart wearable device through the charging seat, and receive an external power supply voltage through the charging connection end and output to the smart wearable device and the energy storage module through the charging connection end and the charging seat.

8. The charging case of claim 6, wherein, The interface circuit comprises: a communication module having a communication end for communicatively connecting with the smart wearable device; the control module is configured to output software upgrade data to the smart wearable device through the communication end, so that the smart wearable device is upgraded according to the software upgrade data.

9. A smart wearable device, characterized by, The smart wearable device comprises the interface circuit according to any one of claims 1 to 5.

10. A smart wear device assembly comprising: The charging box comprises the charging box according to any one of claims 6 to 8; and / or, the smart wearable device comprises the smart wearable device according to claim 9.

Images