Wearable medical device

Abstract

The invention provides a wearable medical device which comprises a flexible circuit board, and the flexible circuit board is arranged in a folded mode. An antenna main body is arranged in the flexible circuit board, the antenna main body and a main circuit board of the flexible circuit board are respectively arranged on two folded sides of the flexible circuit board, and the antenna main body is arranged right above the main circuit board; the flexible circuit board is further provided with an awakening module, and the wearable medical device is awakened from a dormant state through the awakening module to enter a working state. According to the wearable medical device, the antenna body and the main circuit board are arranged on the same flexible circuit board, and the antenna radiation unit is arranged right above the main circuit board by folding the flexible circuit board, so that the size of the circuit board is reduced, and the miniaturization design of the wearable medical device is realized.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a wearable medical device. Background Art

[0002] A wearable medical device needs to communicate with external devices, transmit or receive communication microwave signals, and thus requires an antenna component. In the related technologies of antennas for existing wearable medical devices, the antenna of the wearable medical device often exists independently in a form separated from the signal source, and is attached or laser engraved on the product housing. Such a design requires spring pins, antenna shrapnel or coaxial cables to achieve connection with the circuit board. This design has a complex structure and troublesome assembly; or a PCB board-mounted antenna is used. Such a design requires sufficient clearance area on the PCB, which is not conducive to the miniaturization of wearable devices. There are also cases where small ceramic antennas are used, which have a high cost.

[0003] Therefore, there is an urgent need in the prior art for an antenna solution with a simple structure, convenient assembly, low cost, and capable of miniaturizing the wearable medical device. Summary of the Invention

[0004] The present invention provides a wearable medical device, aiming to solve the technical problems of the traditional wearable medical device having a complex structure design, troublesome assembly, requiring sufficient clearance area, being not conducive to the miniaturization of wearable devices, and having a high cost.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions.

[0006] A wearable medical device includes a flexible circuit board, and the flexible circuit board is folded.

[0007] An antenna main body is provided in the flexible circuit board. The antenna main body and the main circuit board of the flexible circuit board are respectively disposed on two sides of the fold of the flexible circuit board. Among them, the antenna main body is disposed directly above the main circuit board.

[0008] A wake-up module is further provided on the flexible circuit board. The wearable medical device is woken up from the sleep state through the wake-up module to enter the working state.

[0009] Preferably, the antenna main body includes a radiation unit and a feeding structure;

[0010] The vertical projection area of the radiation unit on the main circuit board and / or the area of the main circuit board adjacent to the vertical projection area form an antenna reference ground plane; the radiation unit is connected to a signal source through the feeding structure.

[0011] Preferably, the radiation unit, the feeding structure and the antenna reference ground plane together form a Monopole antenna;

[0012] Among them, the radiation unit is a metal conductor, which is used to convert an electrical signal into an electromagnetic wave for radiation, or convert the received electromagnetic wave into an electrical signal;

[0013] The feeding structure includes a feeding wire and a feeding point. One end of the radiation unit is connected to one end of the feeding wire through the feeding point, and the other end of the radiation unit is suspended;

[0014] The other end of the feeding wire is connected to a signal source through a transmission line; the current of the signal source enters the radiation unit through the feeding point, triggering the radiation unit to radiate electromagnetic waves; here, the signal source is the main control chip.

[0015] Preferably, the radiation unit is a planar metal or a linear metal;

[0016] A short - circuit stub is also provided on the antenna body; the radiation unit, the feeding structure, the antenna reference ground plane and the short - circuit stub together constitute a PIFA antenna; among them, the short - circuit stub is connected to the antenna reference ground plane through a short - circuit point provided on the short - circuit stub.

[0017] Preferably, the flexible circuit board further includes an auxiliary circuit board; the radiation unit is disposed on the auxiliary circuit board of the flexible circuit board; after the flexible circuit board is folded, the auxiliary circuit board is located directly above the main circuit board; a battery, a main control chip, a control circuit and a sensor assembly are provided on the main circuit board; the battery provides power for the main control chip, the control circuit and the sensor assembly; the control circuit is respectively connected to the sensor assembly and the main control chip; the control circuit is responsible for transmitting, processing and controlling the electrical signals from the sensor assembly, and transmitting the processed electrical signals to the main control chip; the main control chip is the core component of the wearable medical device, used to implement functions such as wireless connection, data transmission, device management, protocol stack processing and power consumption management of the device; after receiving the signals transmitted by the control circuit, the main control chip performs further processing and analysis.

[0018] Preferably, a wake - up module is also provided on the flexible circuit board; the wake - up module is responsible for monitoring the trigger conditions and waking up the wearable medical device from the sleep state to enter the working state when the conditions are met.

[0019] Preferably, the wake - up module adopts an NFC wake - up module or a magnetic sensor wake - up module or a light - sensitive wake - up module or a capacitive sensor wake - up module or an electrochemical sensor wake - up module or an acceleration sensor wake - up module.

[0020] Preferably, the main circuit board and the auxiliary circuit board are connected by a flexible connector to form a physical interconnecting member, and there is no specific requirement for the connection position of the main circuit board and the auxiliary circuit board at the outer frame; the flexible connector is in a strip shape and is arranged on the flexible circuit board; one end of the flexible connector is connected to the main circuit board, and the other end of the flexible connector is connected to the auxiliary circuit board.

[0021] Preferably, the sensor assembly includes a sensor fixing member and a sensor probe; the sensor probe includes, but is not limited to, lactate, acetylcholine, amylase, bilirubin, cholesterol, chorionic gonadotropin, creatine kinase, creatine, DNA, fructosamine, glucose, glutamine, growth hormone, hematocrit, hemoglobin, hormones, ketones, lactate, oxygen, prostate specific antigen, prothrombin, RNA, thyroid stimulating hormone, and troponin sensors; the sensor probe is used to obtain human biological parameters; the sensor fixing member is used to provide stable support and fixation for the sensor probe to ensure that the sensor probe contacts the human skin surface or penetrates into the subcutaneous tissue of the human body at the correct position and angle, so as to accurately obtain the required biological parameters; the sensor assembly converts the obtained human biological parameters into electrical signals and transmits the electrical signals to the control circuit.

[0022] Preferably, after the flexible circuit board is folded, the housing encloses the flexible circuit board, and the distance between the main circuit board and the auxiliary circuit board is 1.5 mm to 3 mm. The distance between the main circuit board and the auxiliary circuit board is the antenna clearance height; the planar shape of the housing is square or circular or oval or teardrop-shaped or triangular with rounded corners; the shape of the main circuit board is square or circular or oval or teardrop-shaped or annular or triangular with rounded corners; the shape of the auxiliary circuit board is square or circular or oval or teardrop-shaped or annular or triangular with rounded corners.

[0023] Preferably, a chip matching circuit is provided on the main circuit board near the main control chip; the chip matching circuit is used to adjust the output impedance of the communication signal of the main control chip; an antenna matching circuit is provided at a position near the radiation unit and the feeding structure; the antenna matching circuit is used to adjust the input impedance of the antenna.

[0024] Compared with the prior art, the present invention has the following beneficial effects.

[0025] 1. The wearable medical device of the present invention can be folded by adopting a flexible circuit board (including a main circuit board and an auxiliary circuit board). By utilizing the foldable effect of the flexible circuit board, the volume of the circuit board can be reduced, thereby realizing the miniaturized design of the wearable medical device; the main circuit board and the auxiliary circuit board are arranged in the upper shell and the lower shell by folding, and this integrated design reduces the complexity of manufacturing and assembly. At the same time, the occupied space can be reduced to meet the design requirements of miniaturization and light weight.

[0026] 2. The radiation unit, feeding structure, and antenna reference ground plane of the present invention together form the antenna of the wearable medical device. This design optimizes the performance of the antenna, improving the efficiency and stability of information transmission and reception. At the same time, by optimizing material selection and structural design, the overall weight of the device is reduced, enhancing the portability and comfort of wearing. The vertical projection area of the radiation unit on the main circuit board and / or the area of the main circuit board adjacent to the vertical projection area form the antenna reference ground plane, and the ground plane is integrated with the circuit board of the device. This integrated design helps to save space.

[0027] 3. The main circuit board of the present invention integrates a battery, a main control chip, a control circuit, and a sensor assembly, forming a complete signal acquisition, processing, and control system. The control circuit is responsible for transmitting, processing, and controlling the electrical signals from the sensor assembly, and transmitting the processed signals to the main control chip for further analysis, ensuring the accuracy and efficiency of the signals. The wake-up module is responsible for monitoring the trigger conditions and waking up the wearable medical device from the sleep state when the conditions are met. This design helps to reduce the energy consumption of the device and extend the battery usage time. In addition, the intelligent wake-up function also enables the device to automatically enter the working state according to needs, improving the convenience and intelligence level of use.

[0028] 4. The radiation unit of the present invention is provided with short-circuit stubs; the radiation unit, feeding structure, antenna reference ground plane, and short-circuit stubs together form a PIFA antenna; this structure uses a planar radiation unit as the radiator. After folding, the radiation unit is parallel to the main circuit board, and the projection area formed by the radiation unit on the main circuit board serves as the antenna reference ground plane. There are two pins on the radiation unit, the antenna feed end and the short-circuit stub, which are used for grounding and as the feed point respectively. The feed end transmits the radio frequency signal from the radio frequency circuit to the antenna, or transmits the signal received by the antenna back to the radio frequency circuit. In the design of the antenna, parameters such as the position, shape, and size of the feed point need to be carefully designed and optimized to ensure the efficient transmission of signals and the good performance of the antenna. Grounding the short-circuit stub can reduce the interference between the antenna and other electronic devices, improving the stability and performance of the antenna. In the antenna structure, the short-circuit stub is connected to the ground plane of the antenna through a short-circuit point, forming a closed circuit loop. The introduction of the short-circuit stub can change the impedance matching and radiation performance of the antenna, thus affecting parameters such as the resonant frequency and bandwidth of the antenna. By adjusting parameters such as the length and position of the short-circuit stub, the performance of the antenna can be optimized to better adapt to different application scenarios and working conditions. Among them, the short-circuit stub is associated with the antenna reference ground plane. The reactance component introduced by the short-circuit stub itself can adjust the input impedance of the antenna, change the effective electrical length of the radiation unit to redistribute the current on the radiation unit, change the current path length, and lower the resonant point of the radiation unit, thereby further reducing the physical size of the antenna and making the entire wearable medical device more lightweight.

[0029] The present invention will be further described below in conjunction with the accompanying drawings. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of the wearable medical device of the present invention.

[0031] Figure 2 It is the first embodiment after the flexible circuit board of the present invention is unfolded.

[0032] Figure 3 It is the second embodiment after the flexible circuit board of the present invention is unfolded.

[0033] Figure 4 It is the third embodiment after the flexible circuit board of the present invention is unfolded.

[0034] Figure 5 It is a schematic structural diagram after the flexible circuit board of the present invention is folded in half.

[0035] Figure 6 It is a schematic structural diagram of the wearable medical device after being disassembled when the wake-up module of the present invention is an NFC wake-up module.

[0036] Figure 7 It is a schematic structural diagram of the wearable medical device after being disassembled when the wake-up module of the present invention is a magnetic sensor wake-up module.

[0037] Figure 8 It is the working principle diagram of the PIFA antenna of the present invention.

[0038] Figure 9 It is the equivalent circuit diagram of the PIFA antenna of the present invention.

[0039] Figure 10 It is the first embodiment diagram of the PIFA antenna of the present invention.

[0040] Figure 11 It is the second embodiment diagram of the PIFA antenna of the present invention.

[0041] Figure 12 It is the third embodiment diagram of the PIFA antenna of the present invention.

[0042] Figure 13 It is the first embodiment diagram of the Monopole antenna of the present invention.

[0043] Figure 14 It is the second embodiment diagram of the Monopole antenna of the present invention.

[0044] Figure 15 It is the first embodiment diagram after the flexible circuit board of the present invention is folded.

[0045] Figure 16 This is the second embodiment diagram of the flexible circuit board after folding in the present invention.

[0046] Figure 17 This is the third embodiment diagram of the flexible circuit board after folding in the present invention.

[0047] Figure 18 This is the embodiment of the main control chip and antenna impedance matching in the present invention.

[0048] Figure 19 This is the echo loss simulation diagram of the Monopole antenna or PIFA antenna in the present invention.

[0049] Figure 20 This is the efficiency simulation diagram of the Monopole antenna or PIFA antenna in the present invention.

[0050] Figure 21 This is the radiation pattern simulation diagram of the Monopole antenna or PIFA antenna in the present invention.

[0051] Figure 22 This is the schematic diagram of the communication connection between the wearable medical device and the terminal device in the present invention.

[0052] Reference numerals: 11 - upper shell, 12 - lower shell, 13 - flexible circuit board, 14 - battery, 15 - main control chip, 16 - wake-up module, 17 - auxiliary circuit board, 18 - main circuit board, 19 - flexible connector, 23 - shorting stub, 24 - feeding structure, 25 - radiation unit, 26 - antenna reference ground plane Detailed implementation manners

[0053] As Figure 1-21 shown, this kind of wearable medical device includes a flexible circuit board 13; the flexible circuit board 13 is folded; an antenna body is arranged in the flexible circuit board 13; the antenna body and the main circuit board of the flexible circuit board 13 are respectively arranged on two sides of the parallel structure formed after the flexible circuit board 13 is folded, wherein the antenna body is arranged directly above the main circuit board 18; a wake-up module 16 is further arranged on the flexible circuit board 13, and the wake-up module 16 is responsible for monitoring the triggering conditions and waking up the wearable medical device from the sleep state to enter the working state when the conditions are met. During use, the sensor probe of the wearable medical device is inserted into the subcutaneous tissue of the user or attached to the skin surface of the user for use; the sensor assembly in the wearable medical device further includes a temperature sensor and other auxiliary test sensors arranged on the main circuit board; in the present invention, by placing the antenna body and the main circuit board on the same flexible circuit board and folding the flexible circuit board in half, the antenna radiation unit is placed directly above the main circuit board, thereby reducing the volume of the circuit board and realizing the miniaturized design of the wearable medical device.

[0054] In this embodiment, the flexible circuit board 13 includes a main circuit board 18 and an auxiliary circuit board 17; the board frame sizes and shapes of the main circuit board 18 and the auxiliary circuit board 17 may be the same or different; the radiation unit is disposed on the auxiliary circuit board 17 of the flexible circuit board 13.

[0055] The main circuit board 18 and the auxiliary circuit board 17 are disposed in the upper shell 11 and the lower shell 12 by folding, and the main circuit board 18 and the auxiliary circuit board 17 are foldably connected; after the flexible circuit board 13 is folded, a gap is left between the main circuit board 18 and the auxiliary circuit board 17; a battery 14, a main control chip 15, a control circuit and a sensor assembly are disposed on the main circuit board 18; the battery 14 provides power for the main control chip 15, the control circuit and the sensor assembly, and outputs a continuous and stable voltage; the control circuit is respectively connected to the sensor assembly and the main control chip 15; the control circuit is responsible for transmitting, processing and controlling the electrical signals from the sensor assembly, and transmitting the processed electrical signals to the main control chip 15. After receiving the signals transmitted by the control circuit, the main control chip 15 performs further processing and analysis; in the medical monitoring device, the main control chip 15 is the core component in the communication system, and realizes functions such as wireless connection, data transmission, device management, protocol stack processing and power consumption management. The wearable medical device is teleconnected to one or more data receiving devices; the data receiving devices include but are not limited to mobile phones, watches, PDM devices or gateways; the wearable medical device transmits the detection data to the receiving device, and the individual views the health parameters through the data receiving device and judges the next treatment; the data receiving device is teleconnected to the network platform; the data receiving device can further send the data to the network platform, and medical staff can use the network platform to monitor the health parameters.

[0056] A radiation unit 25 is disposed on the auxiliary circuit board 17. After the flexible circuit board 13 is folded, the vertical projection area of the radiation unit 25 on the main circuit board 18 and / or the area of the main circuit board 18 adjacent to the vertical projection area form an antenna reference ground plane 26; the radiation unit 25 is connected to a signal source through a feeding structure 24, and the radiation unit 25, the feeding structure and the antenna reference ground plane 26 together form an antenna of the wearable medical device for information transmission with a terminal device.

[0057] In this embodiment, the wearable medical device further includes a housing; the housing includes an upper shell 11 and a lower shell 12; after the flexible circuit board 13 is folded, the housing encloses the flexible circuit board 13, and the distance between the main circuit board 18 and the auxiliary circuit board 17 is 1.5 mm to 3 mm; the planar shape of the housing is square or circular or oval or teardrop-shaped or triangular with rounded corners; the shape of the main circuit board 18 is square or circular or oval or teardrop-shaped or annular or triangular with rounded corners; the shape of the auxiliary circuit board 17 is square or circular or oval or teardrop-shaped or annular or triangular with rounded corners.

[0058] In one case of this embodiment, the radiation unit 25, the feeding structure 24, and the antenna reference ground plane 26 together form a Monopole antenna; the radiation unit 25 is a metal conductor; the length is usually one-quarter wavelength of the signal. The feeding structure 24 includes a feeding wire and a feeding point. One end of the radiation unit 25 is connected to one end of the feeding wire through the feeding point, and the other end of the radiation unit 25 is suspended parallel to the antenna reference ground plane 26; the other end of the feeding wire is connected to the signal source through a transmission line; the current of the signal source enters the radiation unit 25 through the feeding point, causing the radiation unit 25 to radiate electromagnetic waves. Here, the signal source is the main control chip 15.

[0059] In another case of this embodiment, a shorting stub 23 is further provided on the radiation unit 25; the radiation unit 25, the feeding structure 24, the antenna reference ground plane 26, and the shorting stub 23 together form a PIFA antenna; the shorting stub 23 is connected to the antenna reference ground plane 26 through a shorting point provided on the shorting stub 23; this connection method helps to form a complete resonant system and enhance the radiation ability of the antenna. In the PIFA antenna, the radiation unit 25, the feeding structure 24, the antenna reference ground plane 26, and the shorting stub 23 form a closed circuit loop. The shorting stub is usually made of a metal sheet similar to the radiation unit 25. The position and connection method of the shorting point have an important impact on the performance of the antenna because it determines the electrical connection between the shorting stub and the antenna reference ground plane 26. The introduction of the shorting stub 23 can change the impedance matching and radiation performance of the PIFA antenna, thereby affecting parameters such as the resonant frequency and bandwidth of the PIFA antenna; by adjusting parameters such as the length and position of the shorting stub 23, the performance of the PIFA antenna can be optimized to better adapt to different application scenarios and working conditions; the equivalent length L of the radiation unit 25 is one-quarter wavelength at the dielectric resonant frequency, and the length can be adjusted on the antenna radiation unit according to actual needs to tune the antenna to the target frequency band.

[0060] In this embodiment, the wake-up module 16 adopts an NFC wake-up module or a magnetic sensor wake-up module. As a passive NFC device, when a terminal device with NFC function approaches this device, the NFC antenna of this device receives the energy of the active device through magnetic field induction to activate itself, and then starts the corresponding connection process. The device communicates and connects with the terminal device through the antenna. The NFC detection distance is usually within 4 centimeters. In addition, in the magnetic sensor wake-up, the magnetic sensor is an electronic switch. When a magnetic field change is sensed inside it, a voltage signal of high level or low level will be generated. The magnetic switch triggers the control signal, and the microcontroller will send an instruction to start the device connection operation.

[0061] The NFC wake-up module includes an NFC antenna, an NFC controller, a wake-up logic circuit, and a low-power mode management module;

[0062] NFC antenna: Responsible for receiving and transmitting signals with external NFC devices, and transmitting energy and data through electromagnetic fields.

[0063] NFC controller: Processes NFC protocols and data transmission, is responsible for controlling the wake-up process, determines when to receive external signals, and starts corresponding operations.

[0064] Wake-up logic circuit: When the NFC controller detects a signal from the NFC antenna, the wake-up logic is responsible for triggering the wake-up process of the device, usually involving switching the device from the low-power mode to the normal working mode.

[0065] Low-power mode management module: When the device is in the standby or sleep state, the NFC controller is usually in the low-power mode. The wake-up signal can trigger the controller to enter the normal working state to respond to the requests of external NFC devices.

[0066] The magnetic sensor wake-up module includes: a magnetic sensor, a digital output, and a signal processing circuit.

[0067] Magnetic sensor (Hall sensor, etc.): The magnetic sensor controls the circuit switch by detecting changes in the external magnetic field, and can convert the changing magnetic field signal into a digital voltage signal for output. Common types of magnetic sensor switches are: Hall switches, magnetoresistive switches, and reed switches. Among them, Hall sensors measure the magnetic field strength through the Hall effect and are widely used in wake-up applications. The magnetoresistive switch is a switching device based on the magnetoresistive effect. The magnetoresistive effect refers to the change in the resistance of a material with the change of the external magnetic field.

[0068] Digital output: The module usually provides a digital signal output (such as high level or low level), which can be directly connected to other control systems, such as a microcontroller (MCU).

[0069] Signal processing circuit: used to process the analog signal output by the magnetic sensor and convert it into a reliable digital output signal. This circuit usually includes a comparator, a trigger, etc.

[0070] Of course, in other embodiments, the wake-up module 16 can also adopt a light-sensing wake-up module, a capacitive sensor wake-up module, an electrochemical sensor wake-up module, or an acceleration sensor wake-up module.

[0071] In this embodiment, the main circuit board 18 and the auxiliary circuit board 17 are connected by a flexible connector 19 to form a physical interconnecting member. There are no specific requirements for the connection position of the flexible connector 19 between the main circuit board 18 and the auxiliary circuit board 17; the flexible connector 19 is in a strip shape and is arranged on the flexible circuit board; one end of the flexible connector 19 is connected to the main circuit board 18, and the other end of the flexible connector 19 is connected to the auxiliary circuit board 17. The flexible connector 19 is bent at the connection part of the main circuit board 18 and the auxiliary circuit board 17 to form the "neck" of the flexible circuit board 13. After the main circuit board 18 and the auxiliary circuit board 17 are folded in half, an approximately parallel effect is formed; the radiation unit 25 is bent at the flexible connector 19, and the bent part is adapted to the shape of the flexible connector 19.

[0072] In this embodiment, the sensor assembly includes a sensor fixing member and a sensor probe; the sensor probe includes, but is not limited to, lactate, acetylcholine, amylase, bilirubin, cholesterol, chorionic gonadotropin, creatine kinase, creatine, DNA, fructosamine, glucose, glutamine, growth hormone, hematocrit, hemoglobin, hormones, ketones, lactate, oxygen, prostate specific antigen, prothrombin, RNA, thyroid stimulating hormone, and troponin sensors; the sensor probe is used to obtain human biological parameters; the sensor fixing member is used to provide stable support and fixation for the sensor probe to ensure that the sensor probe contacts the human body at the correct position and angle, so as to accurately obtain the required biological parameters; the sensor assembly converts the obtained human biological parameters into electrical signals and transmits the electrical signals to the control circuit; the connection between the sensor assembly and the control circuit adopts plug-in or welding connection methods, etc., specifically depending on the type of the sensor and the application scenario. During the connection process, it is necessary to ensure the accuracy and stability of the signal and avoid the influence of interference and noise. The connection between the control circuit and the main control chip 15 is usually connected through the traces on a flexible printed circuit board (FPC).

[0073] In this embodiment, a chip matching circuit is provided on the main circuit board 18 near the main control chip 15; the main control chip 15 is connected to the chip matching circuit through a radio frequency signal port, and the chip matching circuit is used to adjust the output impedance of the radio frequency signal output by the main control chip 15 to match the impedance of the subsequent circuit (such as an antenna), thereby reducing signal reflection and loss; the chip matching circuit is a small circuit containing components such as inductors and capacitors, and is used to adjust the impedance of the radio frequency signal output by the main control chip 15 to be close to 50 ohms (or other standard values). An antenna matching circuit is provided at a position close to the radiation unit 25 and the feeding structure 24; the antenna matching circuit is connected to the antenna through a transmission line to ensure that the signal is transmitted to the antenna and radiated efficiently. The antenna matching circuit is used to adjust the input impedance of the antenna to ensure that it matches the output impedance of the main control chip 15, optimize the signal transmission efficiency, thereby minimizing the reflected power and ensuring that the signal can be effectively transmitted from the source to the antenna and radiated out; the radio frequency signal output by the main control chip 15 is passed through the chip matching circuit to make its characteristic impedance reach close to 50 ohms at R0, and the antenna matching circuit also adjusts the input impedance of the antenna of the present invention to be close to 50 ohms at R0. The chip matching circuit transmits the radio frequency signal to the antenna matching circuit through a transmission line. In this wearable medical device, the antenna matching circuit may be a π-type or L-type circuit, and impedance matching is achieved by adjusting the values of components such as inductors and capacitors. Good impedance matching can improve the radiation efficiency of the antenna, reduce the reflection loss, and improve the overall performance of the system. The antenna matching circuit can be a π-type or L-type circuit. R0 is 0 ohm, and it can also be directly replaced by a microstrip line.

[0074] In this embodiment, the sensor fixture needs to consider durability, stability, and the ability to be easily cleaned and disinfected, and may include special clamps or brackets or mounting plates to meet the special requirements of medical devices.

[0075] In this embodiment, the control circuit is responsible for functions such as monitoring sensor data, processing data, and controlling the working state of the wearable medical device.

[0076] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules is only a logical function division, and there may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical, mechanical or other forms.

[0077] Other embodiments of the present invention will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following the general principles of the invention and including known common general knowledge or conventional technical means in the technical field not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the invention are pointed out by the following claims.

[0078] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A wearable medical device, characterized in that: It comprises a flexible circuit board (13), wherein the flexible circuit board (13) is folded; An antenna body is arranged in the flexible circuit board (13), and the antenna body and a main circuit board (18) of the flexible circuit board (13) are respectively arranged on two sides formed after the flexible circuit board (13) is folded, wherein the antenna body is arranged directly above the main circuit board (18); The flexible circuit board (13) is also provided with a wake-up module (16), and the wearable medical device is awakened from a dormant state through the wake-up module (16) to enter a working state.

2. A wearable medical device according to claim 1, characterized in that: The antenna body comprises a radiation unit (25) and a feeding structure (24); The radiating unit (25) forms an antenna reference ground plane (26) in a vertical projection area on the main circuit board (18) and / or an area of ​​the main circuit board (18) adjacent to the vertical projection area; the radiating unit (25) is connected to a signal source via a feeding structure (24).

3. The wearable medical device according to claim 2, characterized in that: The radiation unit (25), the feeding structure (24) and the antenna reference ground plane (26) together constitute a Monopole antenna; Wherein, the radiation unit (25) is a metal conductor, used for converting electrical signals into electromagnetic waves for radiation, or converting received electromagnetic waves into electrical signals; The feeding structure (24) comprises a feeding line and a feeding point, one end of the radiating unit (25) is connected to one end of the feeding line via the feeding point, and the other end of the radiating unit (25) is suspended; The other end of the feed line is connected to a signal source via a transmission line; the current of the signal source enters the radiation unit (25) through a feeding point, causing the radiation unit (25) to radiate electromagnetic waves.

4. The wearable medical device according to claim 3, characterized in that: The radiation unit (25) is a planar metal or a linear metal; A short-circuit branch (23) is also provided on the antenna body; the radiation unit (25), the feeding structure (24), the antenna reference ground plane (26) and the short-circuit branch (23) together constitute a PIFA antenna; wherein the short-circuit branch (23) is connected to the antenna reference ground plane (26) via a short-circuit point provided on the short-circuit branch (23).

5. The wearable medical device according to any one of claims 1 to 4, characterized in that: The flexible circuit board (13) further comprises an auxiliary circuit board (17); the radiation unit is arranged on the auxiliary circuit board (17) of the flexible circuit board (13); After the flexible circuit board (13) is folded, the auxiliary circuit board (17) is located directly above the main circuit board (18); a battery (14), a main control chip (15), a control circuit and a sensor assembly are arranged on the main circuit board (18); the battery (14) provides power to the main control chip (15), the control circuit and the sensor assembly; the control circuit is connected to the sensor assembly and the main control chip (15) respectively; the control circuit is responsible for transmitting, processing and controlling the electrical signals from the sensor assembly, and transmitting the processed electrical signals to the main control chip (15); the main control chip is a core component of the wearable medical device, and is used to realize the wireless connection, data transmission, device management, protocol stack processing and power consumption management functions of the device; after receiving the signal transmitted by the control circuit, the main control chip (15) performs further processing and analysis.

6. The wearable medical device according to claim 1, characterized in that: The wake-up module (16) adopts an NFC wake-up module, a magnetic sensor wake-up module, a light sensor wake-up module, a capacitive sensor wake-up module, an electrochemical sensor wake-up module, or an acceleration sensor wake-up module.

7. The wearable medical device according to claim 5, characterized in that: The main circuit board (18) and the auxiliary circuit board (17) are connected by a flexible connector (19); the flexible connector (19) is in the shape of a strip and is arranged on the flexible circuit board; one end of the flexible connector (19) is connected to the main circuit board (18), and the other end of the flexible connector (19) is connected to the auxiliary circuit board (17).

8. The wearable medical device according to claim 5, characterized in that: The sensor assembly includes a sensor fixture and a sensor probe; the sensor probe is used to obtain human biological parameters; the sensor fixture is used to provide stable support and fixation for the sensor probe, ensuring that the sensor probe contacts the human body at the correct position and angle, so as to accurately obtain the required biological parameters; the sensor assembly converts the obtained human biological parameters into electrical signals, and transmits the electrical signals to the control circuit.

9. The wearable medical device according to claim 5, characterized in that: After the flexible circuit board (13) is folded, the shell encloses the flexible circuit board (13), and the spacing between the main circuit board (18) and the auxiliary circuit board (17) is 1.5 mm to 3 mm, and the spacing between the main circuit board (18) and the auxiliary circuit board (17) is the antenna clearance height; the plane shape of the shell is square, circular, elliptical, teardrop-shaped, or a triangle with rounded corners; the shape of the main circuit board (18) is square, circular, elliptical, teardrop-shaped, annular, or a triangle with rounded corners; the shape of the auxiliary circuit board (17) is square, circular, elliptical, teardrop-shaped, annular, or a triangle with rounded corners.

10. The wearable medical device according to claim 5, characterized in that: A chip matching circuit is arranged on the main circuit board (18) near the main control chip (15); the chip matching circuit is used to adjust the output impedance of the communication signal of the main control chip (15); an antenna matching circuit is arranged near the radiation unit (25) and the feeding structure (24); the antenna matching circuit is used to adjust the input impedance of the antenna to ensure matching with the output impedance of the main control chip.

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