Blood pressure measuring equipment

Abstract

The invention provides a blood pressure measuring device. The blood pressure measuring apparatus includes a main body and a balloon. Wherein the air bag is provided with an air cavity and is fixed at one end part of the main body. The main body is provided with a cavity defined by a plurality of side walls, and an air supply and exhaust device and a first air pressure sensor can be arranged in the cavity of the main body but not limited to the cavity. The air supply and exhaust device comprises an air inlet path and an air outlet path, and the air supply and exhaust device communicates with the air cavity of the air bag through the first air path. The first air pressure sensor comprises a first air hole and a second air hole, and a pressure film is arranged between the first air hole and the second air hole. In addition, a first air hole is formed in the side wall of the main body, the first air hole can be communicated with the air cavity of the air bag through a second air path, and the second air hole can be communicated with the first air hole through a third air path. The air pressures on the two sides of the pressure film of the first air pressure sensor are the air pressure in the air bag and the external atmospheric pressure respectively and are not affected by the air pressure in the cavity, so that the blood pressure measurement precision of the blood pressure measurement equipment is high.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of the Chinese patent application filed with the China Patent Office on July 30, 2021, with application number 202110869082.3 and application name “A Blood Pressure Measurement Device”, the entire contents of which are incorporated by reference in this application. Technical Field

[0003] The present application relates to the technical field of electronic equipment, and in particular to a blood pressure measuring device. Background Art

[0004] Nowadays, people pay more and more attention to the health of themselves and their families, and blood pressure measurement is particularly important. With the advancement and development of technology, not only blood pressure measurement equipment for home use has appeared, but also some wearable devices (such as smart watches or smart bracelets, etc.) have begun to integrate blood pressure measurement functions, which provides users with the possibility to measure blood pressure anytime and anywhere.

[0005] The current blood pressure measuring devices all directly place the micro pump and the pressure sensor inside the main body of the blood pressure measuring device. The pressure sensor can obtain the user's blood pressure value by measuring the air pressure inside the main body of the blood pressure measuring device and the air pressure of the air bag. However, in the process of using the blood pressure measuring device to measure blood pressure, since the micro pump will fill the gas inside the main body into the air bag, this will cause the air pressure inside the main body to fluctuate, thereby causing the air pressure inside the main body detected by the pressure sensor to be unstable, resulting in low accuracy of the blood pressure value measured by the blood pressure measuring device.

[0006] Therefore, how to provide a blood pressure measurement device that can meet the blood pressure measurement accuracy has become a difficult problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] The present application provides a blood pressure measuring device to reduce the influence of the internal air pressure of the blood pressure measuring device on its blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0008] In the first aspect, the present application provides a blood pressure measuring device, which may include a main body, an air bag, an air supply and exhaust device, and a first air pressure sensor. The main body includes a cavity, and each functional module or device of the blood pressure measuring device may be arranged in the cavity, for example, the air supply and exhaust device and the first air pressure sensor may be arranged in the cavity. The air bag is fixed to one end of the main body, and the air bag has an air cavity. The air supply and exhaust device includes an air intake air path and an air discharge air path, and the air supply and exhaust device is connected to the air cavity of the air bag through the first air path. The first air pressure sensor includes a first air hole, a second air hole and a pressure film, the pressure film is located between the first air hole and the second air hole, and the first air hole is connected to the air cavity of the air bag through the second air path. In addition, the cavity of the main body may be formed by a plurality of side walls, and a first air hole may be opened on the side wall, and the first air hole is connected to the outside atmosphere. In this way, the second air hole of the first air pressure sensor can be connected to the first air hole through the third air path, so that the first air pressure sensor is connected to the outside atmosphere through the first air hole. When using the blood pressure measuring device provided by the present application, since the air pressures on both sides of the pressure film of the first air pressure sensor are respectively the external atmospheric pressure and the air pressure in the air cavity of the airbag, the blood pressure is not affected by the air pressure in the cavity during the blood pressure measurement process. Therefore, the blood pressure measurement accuracy of the blood pressure measuring device is relatively high.

[0009] Since the air supply and exhaust device is arranged in the cavity of the main body, if the air intake path and the air discharge path of the air supply and exhaust device are both connected to the cavity of the main body, a negative pressure will be generated in the cavity of the main body during the operation of the air supply and exhaust device (the difference between the internal and external air pressure, that is, the air pressure inside the cavity of the main body is less than the external atmospheric pressure). In traditional blood pressure measuring devices, in order to reduce the negative pressure inside the cavity of the main body, the blood pressure measuring devices are not waterproof. The main reason is that the provision of a waterproof membrane will reduce the air permeability of the blood pressure measuring device, thereby causing a larger negative pressure inside the cavity of the main body, thereby increasing the system error in the blood pressure measurement process. In addition, the air pressure value inside the cavity of the main body and its fluctuation will also cause errors in blood pressure measurement. However, most of the components of the blood pressure measuring device are arranged in the cavity of the main body. If the main body is not waterproofed, there is a greater risk of damage to the components in the cavity of the main body of the blood pressure measuring device, which will affect the service life of the blood pressure measuring device. In order to solve this problem, in a possible implementation of the present application, a second air hole can be opened on the side wall of the main body, and the second air hole is connected to the outside atmosphere, so that the gas of the outside atmosphere can enter the cavity of the main body through the second air hole, so that the gas in the cavity of the main body can be replenished in time to reduce the negative pressure in the cavity.

[0010] In addition, in order to realize the waterproof design of the blood pressure measuring device, a first waterproof breathable device may be provided at the second breathable hole. In order to reduce the influence of the provision of the first waterproof breathable device on the air permeability at the second breathable hole, the air permeability of the first waterproof breathable device may be greater than or equal to 100 ml / min, so that the gas in the cavity of the main body can be replenished in a timely and stable manner.

[0011] However, when the first waterproof breathable device is blocked, its air permeability will be greatly reduced, thereby causing an increase in negative pressure in the cavity. In a possible implementation of the present application, the blockage of the first waterproof breathable device can be determined by detecting the air permeability of the first waterproof breathable device. In a specific implementation, the blood pressure measuring device may also include a second air pressure sensor, which is disposed in the cavity of the main body. The blood pressure measuring device may determine the air permeability of the first waterproof breathable device according to the air pressure value measured by the second air pressure sensor. Among them, the second air pressure sensor may be an absolute pressure sensor. When the air pressure value measured by the second air pressure sensor is higher than the first threshold value, it can be determined that the air permeability of the first waterproof breathable device is good. In the present application, the first threshold value can be set according to the specific application scenario. For example, it can be 95Kpa. Then, when the air pressure value measured by the second air pressure sensor is higher than 95Kpa, it is determined that the air permeability of the first waterproof breathable device is good.

[0012] Correspondingly, in some possible implementations, when the air pressure value measured by the second air pressure sensor is lower than the first threshold, it can be determined that the first waterproof breathable device is blocked.

[0013] It is understandable that, in the present application, a second waterproof and breathable device may be provided at the first air hole to further improve the waterproof performance of the blood pressure measuring device.

[0014] From the above introduction to the present application, it can be known that one of the reasons for the generation of negative pressure in the cavity of the main body is the inflation and deflation of the airbag by the air supply and exhaust device. In order to reduce the impact of the operation of the air supply and exhaust device on the negative pressure in the cavity of the main body, in a possible implementation of the present application, a fourth air hole and a fifth air hole can also be provided, and the air intake path of the air supply and exhaust device can be connected to the outside atmosphere through the fourth air hole, and the deflation path can be connected to the outside atmosphere through the fifth air hole. In this way, the air supply and exhaust device can fill the gas in the outside atmosphere into the airbag through the fourth air hole and the air intake path, and can discharge the gas in the airbag to the outside atmosphere through the deflation path and the fifth air hole.

[0015] In the present application, the air supply and exhaust device and the first air pressure sensor can be directly connected to the airbag through the corresponding air path, or indirectly connected. Exemplarily, in a possible implementation of the present application, the blood pressure measuring device may also include an air path cavity, which is arranged in the cavity of the main body. In addition, the air supply and exhaust device can be connected to the air path cavity through the first air path, the first air hole of the first air pressure sensor can be connected to the air path cavity through the second air path, and the air path cavity is connected to the air cavity of the airbag through the fourth air path. In this way, the air paths of the air supply and exhaust device and the first air pressure sensor for connecting to the airbag can be first merged through the air path cavity, and then connected to the airbag through an air path. At this time, only one through hole for connecting to the airbag needs to be opened on the side wall of the main body, so that the number of openings on the main body can be reduced to improve the waterproof performance and structural stability of the blood pressure measuring device.

[0016] In a possible implementation of the present application, in order to connect the airbag to the main body, a connecting hole may be provided at the end of the main body. In addition, the airbag has an air nozzle, which protrudes from the airbag in the direction toward the main body from one side surface of the airbag. In this way, the airbag and the air path cavity can be connected by plugging the air nozzle into the connecting hole and connecting the fourth air path to the air nozzle. Similarly, in some other possible implementations, the air nozzle may be provided at the end of the main body, and a connecting hole may be provided on the airbag, so that the connection between the airbag and the main body can be achieved by plugging the air nozzle into the connecting hole.

[0017] It is worth mentioning that, in the present application, the airbag and the main body can be detachably connected, so that the airbag can be disassembled or replaced as needed. In addition, in a possible implementation of the present application, the blood pressure measurement device may also include a photoplethysmograph PPG module and an ECG detection module, and the PPG module and the ECG detection module may be arranged on the bottom surface of the main body. The airbag may also be fixedly connected to one end of the bottom surface of the main body, so that the blood pressure measurement device integrates multiple measurement functions while making the structure of the blood pressure measurement device more compact.

[0018] In order to further improve the blood pressure measurement accuracy of the blood pressure measuring device, in the present application, a calibration device can also be provided for the first air pressure sensor. In a possible implementation of the present application, the blood pressure measuring device can also include a third air pressure sensor, and the third air pressure sensor includes a third air hole and a fourth air hole. In addition, a third air hole is also provided on the side wall of the main body, and the third air hole is connected to the outside atmosphere. The third air hole of the third air pressure sensor is connected to the air path cavity through the seventh air path, and the fourth air hole is connected to the third air hole through the eighth air path. In this way, the third air pressure sensor can measure the air pressure difference between the outside atmosphere and the air pressure in the air cavity of the airbag.

[0019] Because the first air pressure sensor also measures the pressure difference between the outside atmosphere and the air pressure in the air cavity of the airbag, the measurement value of the first air pressure sensor can be calibrated by comparing the pressure differences measured by the first air pressure sensor and the third air pressure sensor. In specific implementation, when the difference between the pressure difference measured by the first air pressure sensor and the pressure difference measured by the third air pressure sensor is within the first threshold range, it is determined that the pressure difference measured by the first air pressure sensor is accurate. In the present application, the first threshold range can be set according to the specific application scenario, and exemplarily, it can be -200Pa to 200Pa.

[0020] Similarly, when the difference between the pressure difference measured by the first air pressure sensor and the pressure difference measured by the third air pressure sensor is outside the first threshold range, it is determined that the pressure difference measured by the first air pressure sensor is inaccurate.

[0021] In addition to the above-mentioned setting method, the third air pressure sensor used to calibrate the measured value of the first air pressure sensor can also be an absolute pressure type air pressure sensor in a possible implementation of the present application. In this implementation, the third air pressure sensor includes only one third air hole, which can be connected to the air path cavity through the seventh air path. The process of calibrating the measured value of the first air pressure sensor by the third air pressure sensor is: when the difference between the air pressure in the airbag measured by the first air pressure sensor and the air pressure in the airbag measured by the third air pressure sensor is within the first threshold range, it is judged that the air pressure in the airbag measured by the first air pressure sensor is accurate; and / or, when the difference between the air pressure in the airbag measured by the first air pressure sensor and the air pressure in the airbag measured by the third air pressure sensor is outside the first threshold range, it is determined that the air pressure in the airbag measured by the first air pressure sensor is inaccurate. By adopting this implementation, the number of air holes opened on the main body can be reduced, thereby improving the waterproof performance of the blood pressure measurement device.

[0022] In the present application, in order to reduce the influence of fluctuations in the gas flow in each gas path on the measurement accuracy, a buffer structure can be provided in the pipeline of the gas path. Exemplarily, a plurality of protrusions can be provided in the pipeline of the second gas path where the first air pressure sensor is connected to the airbag, and the plurality of protrusions are arranged alternately and spaced along the extension direction of the pipeline. The plurality of protrusions can play a buffering role in the process of gas flowing in the second gas path, thereby reducing fluctuations in the gas flow and improving the detection accuracy of the first air pressure sensor.

[0023] In the second aspect, the present application also provides a blood pressure measuring device, which may include a main body, an air bag, an air supply and exhaust device, a first air pressure sensor, and a second air pressure sensor. Among them, the main body includes a cavity, and each functional module or device of the blood pressure measuring device can be arranged in the cavity, for example, the above-mentioned air supply and exhaust device, the first air pressure sensor, and the second air pressure sensor can be arranged in the cavity. The air bag is fixed to one end of the main body, and the air bag has an air cavity. The air supply and exhaust device includes an air intake air path and an air discharge air path, and the air supply and exhaust device is connected to the air cavity of the air bag through the first air path. The first air pressure sensor includes a first air hole, a second air hole and a pressure film, the pressure film is located between the first air hole and the second air hole, the first air hole is connected to the air cavity of the air bag through the second air path, and the second air hole is connected to the cavity, then the pressure difference measured by the first air pressure sensor is determined by the air pressure in the cavity of the main body and the air pressure in the air cavity of the air bag. In addition, the second air pressure sensor is an absolute pressure air pressure sensor, and the second air pressure sensor includes a fifth air hole, and the fifth air hole is arranged opposite to the second air hole.

[0024] By using the blood pressure measuring device provided by the present application, by setting a second air pressure sensor in the cavity of the main body, the blood pressure measuring device can obtain the air pressure value in the air cavity of the airbag according to the external atmospheric pressure, the air pressure value measured by the second air pressure sensor, and the pressure difference measured by the first air pressure sensor. In addition, the difference between the external atmospheric pressure and the air pressure value measured by the second air pressure sensor can be used as an error value for calculating the air pressure in the air cavity of the airbag, and the real air pressure value in the airbag can be obtained, thereby effectively improving the accuracy of blood pressure measurement of the blood pressure measuring device.

[0025] In a possible implementation of the present application, the fifth pore can also be coaxially arranged with the second pore, and the spacing between the fifth pore and the second pore can be less than or equal to 1 mm. Since the second air pressure sensor includes only one fifth pore, it can measure the air pressure in the cavity of the main body. Since the spacing between the fifth pore and the second pore is small, the air pressure measured on the fifth pore side can be considered equal to the air pressure measured on the second pore side.

[0026] In a possible implementation of the present application, the side wall of the main body is also provided with an air hole, and a waterproof breathable device is provided at the air hole. At this time, the blood pressure measuring device can also judge the air permeability of the waterproof breathable device according to the air pressure value measured by the second air pressure sensor. In specific implementation, when the air pressure value measured by the second air pressure sensor is higher than the first threshold value, it can be determined that the air permeability of the waterproof breathable device is good. In the present application, the first threshold value can be set according to the specific application scenario. For example, it can be 95Kpa. When the air pressure value measured by the second air pressure sensor is higher than 95Kpa, it is determined that the air permeability of the waterproof breathable device is good. Correspondingly, in some possible implementations, when the air pressure value measured by the second air pressure sensor is lower than the first threshold value, it can be determined that the waterproof breathable device is blocked. By detecting the air permeability of the waterproof breathable device, the waterproof breathable device can be replaced or cleaned in time when it is blocked to reduce the negative pressure in the cavity of the main body, thereby improving the measurement accuracy of the blood pressure measuring device.

[0027] In a third aspect, the present application also provides a blood pressure measuring device, which may include a main body, an air bag, an air supply and exhaust device, a first air pressure sensor, a second air pressure sensor and a waterproof breathable device. Among them, the main body includes a cavity, and each functional module or device of the blood pressure measuring device can be arranged in the cavity, for example, the above-mentioned air supply and exhaust device, the first air pressure sensor and the second air pressure sensor can be arranged in the cavity. In addition, the cavity is formed by a plurality of side walls, and air holes are opened on the side walls, and the waterproof breathable device covers the air holes. The air bag is fixed to one end of the main body, and the air bag has an air cavity. The air supply and exhaust device includes an air intake air path and an air discharge air path, and the air supply and exhaust device is connected to the air cavity of the air bag through the first air path. The first air pressure sensor is used to measure the air pressure in the air cavity of the air bag. The second air pressure sensor is an absolute pressure type air pressure sensor. When the air pressure value measured by the second air pressure sensor is higher than the first threshold value, it is determined that the air permeability of the waterproof breathable device is good; and / or, when the air pressure value measured by the second air pressure sensor is lower than the first threshold value, it is determined that the waterproof breathable device is blocked.

[0028] By using the blood pressure measuring device provided by the present application, a second air pressure sensor is arranged in the cavity of the main body, so that the air permeability of the waterproof and breathable device can be detected, so that the waterproof and breathable device can be replaced or cleaned in time to ensure the safety of the blood pressure measuring device and the stability of the blood pressure measurement, so that the blood pressure value measured by the blood pressure measuring device is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a blood pressure measurement device provided in one embodiment of the present application;

[0030] Figure 2A schematic diagram of the framework structure of an existing blood pressure measurement device provided in one embodiment of the present application;

[0031] Figure 3 A schematic diagram of the framework structure of a blood pressure measurement device provided in one embodiment of the present application;

[0032] Figures 4a to 4c A schematic diagram of the internal structure of a gas circuit provided in one embodiment of the present application;

[0033] Figure 5 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application;

[0034] Figure 6 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application;

[0035] Figure 7 A schematic diagram of an explosion structure of a waterproof and breathable device is provided for one embodiment of the present application;

[0036] Figure 8 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application;

[0037] Fig. 9 A schematic diagram of a partial structure of a blood pressure measurement device provided in one embodiment of the present application;

[0038] Fig.10 A schematic diagram of the structure of an airbag provided in one embodiment of the present application;

[0039] Fig.11 for Fig.10 A magnified view of the local structure at point A in the middle;

[0040] Fig.12 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application;

[0041] Fig.13 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application;

[0042] Fig.14 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application;

[0043] Fig.15 A schematic diagram of the framework structure of a blood pressure measurement device provided in another embodiment of the present application.

[0044] Reference numerals:

[0045] 1-main body; 101-cavity; 102a, 102b, 102c, 102d, 102e-ventilation holes; 103-connection hole; 104-PPG module;

[0046] 105-ECG detection module; 2-air bag; 201-air nozzle; 2011-clip structure; 3-wristband; 4-air supply and exhaust device;

[0047] 401 - air intake path; 402 - air discharge path; 5a - first air pressure sensor; 501 - first air hole; 502 - second air hole;

[0048] 5b-second air pressure sensor; 505-fifth air hole; 5c-third air pressure sensor; 503-third air hole; 504-fourth air hole;

[0049] 61-first gas path; 62-second gas path; 63-third gas path; 64-fourth gas path; 65-fifth gas path; 66-sixth gas path;

[0050] 67-seventh air path; 601-pipeline; 602-protrusion; 7-driving device; 8-first waterproof and breathable device; 801-foam;

[0051] 802-balance hole steel sheet; 803-PET layer; 804-waterproof film; 805-double-sided adhesive tape; 806-waterproof adhesive;

[0052] 9-a second waterproof and breathable device; 10-an air path cavity; 11-an air valve; 12-a third waterproof and breathable device. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0054] In order to facilitate the understanding of the blood pressure measuring device provided in the embodiment of the present application, its application scenario is first described below. The blood pressure measuring device can be, but is not limited to, a larger device for blood pressure measurement such as medical and household use, or a portable electronic device with a blood pressure measuring function such as a smart watch or a smart bracelet. Taking a smart watch as an example, it can be worn on the user's wrist to detect the user's blood pressure and other physical signs at any time to achieve the prediction of the physical state, thereby effectively avoiding dangerous secondary diseases such as stroke caused by high blood pressure.

[0055] Reference Figure 1 , Figure 1A schematic diagram of the structure of a smart watch with a blood pressure measurement function provided by an embodiment of the present application. A blood pressure measurement device with a blood pressure detection function may generally include a main body 1 and an airbag 2, and the airbag 2 may be fixed to one end of the main body 1. Exemplarily, the airbag 2 may be fixed to an end surface of the bottom surface of the main body 1. In the present application, the bottom surface of the main body 1 refers to the surface of the main body 1 that directly contacts the wrist when the smart watch is worn on the wrist. In addition, the blood pressure measurement device may also include a wristband 3, such as Figure 1 As shown, the airbag 2 can be located on the side of the wristband 3 facing the user's wrist. In this way, when the wristband 3 is wrapped around the user's wrist, the airbag 2 can be pressed against the wrist and fit with the wrist, so as to facilitate the measurement of the user's blood pressure. It can be understood that the airbag 2 and the wristband 3 can be fixed by, but not limited to, snap-fitting, bonding or riveting to reduce the friction generated by the mutual movement between the airbag 2 and the wristband 3, thereby reducing the risk of airbag wear and prolonging the service life of the blood pressure measurement device.

[0056] In addition to the above structure, a smart watch with a blood pressure measurement function can also be provided with a photoplethysmograph (PPG) module. The PPG module 104 can also be provided on the bottom surface of the main body 1. In addition, the PPG module 104 can also be provided in the middle area of ​​the bottom surface of the main body 1 (see Figure 1 The airbag 2 and the PPG module 104 are provided on the smart watch at the same time, so as to improve the detection accuracy of the PPG module 104. Since the PPG module 104 can realize continuous measurement of the heart rate value of the human body, by arranging the airbag 2 and the PPG module 104 on the smart watch at the same time, the function of single blood pressure measurement using the airbag 2 can be integrated with the continuous heart rate measurement function of the PPG module 104, and the problem of continuous blood pressure measurement can be solved through precise algorithm operation.

[0057] You can continue to refer to Figure 1 The smartwatch of the embodiment of the present application may also be provided with an electrocardiogram (ECG) detection module. The ECG detection module 105 may also be provided on the bottom surface of the main body 1. In addition, the ECG detection module 105 may also be provided in the middle area of ​​the main body 1. It may be provided on the peripheral side of the PPG module 104 (see Figure 1 The two arc-shaped areas in the middle of the bottom surface of the main body 1 shown in the figure) are used to realize the electrocardiogram detection function of the smart watch.

[0058] Can be referred to together Figure 2 , Figure 2A schematic diagram of the framework structure of a traditional blood pressure measuring device is shown. Among them, the main body 1 has a cavity 101, and the main functional modules and devices of the blood pressure measuring device (such as circuit components such as processors and sensors) can be arranged in the cavity 101 of the main body 1, for example, the air supply and exhaust device 4 and the first air pressure sensor 5a. One end of the airbag 2 can be connected to the air supply and exhaust device 4 and the first air pressure sensor 5a through an air nozzle, and the airbag 2 can be wrapped around the user's wrist. When using the blood pressure measuring device to measure blood pressure, the airbag 2 can be inflated and deflated through the air supply and exhaust device 4, and the first air pressure sensor 5a can detect the air pressure in the cavity 101 of the main body 1 and the air pressure in the airbag 2 during the above-mentioned inflation and deflation process. In this way, the user's blood pressure value can be obtained through an algorithm based on the two air pressure values.

[0059] From the above introduction to the process of blood pressure measurement by the blood pressure measuring device, it can be understood that since the air supply and exhaust device 4 is arranged in the cavity 101 of the main body 1, the air supply and exhaust device 4 fills the air in the cavity 101 of the main body 1 into the air bag 2 during the process of inflating the air bag 2. In this way, the air pressure in the cavity 101 of the main body 1 will be less than the atmospheric pressure outside the main body 1, so that there is an air pressure difference between the cavity 101 of the main body 1 and the outside of the main body 1, or it can also be understood that negative pressure is generated in the cavity 101 of the main body 1, and the existence of this negative pressure will cause errors in the blood pressure measurement process. In addition, in the process of the air supply and exhaust device 4 inflating and deflating the air bag 2, the air pressure in the cavity 101 of the main body 1 will fluctuate, and the fluctuation of this air pressure will also cause errors in blood pressure measurement.

[0060] Based on this, the embodiment of the present application provides a blood pressure measuring device to reduce the influence of the air pressure in the cavity 101 of the main body 1 of the blood pressure measuring device on its blood pressure measurement, thereby improving the accuracy of blood pressure measurement. For ease of understanding, in the following embodiments of the present application, the specific structure of the blood pressure measuring device is described in detail by taking a smart watch as an example.

[0061] The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more. The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0062] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0063] Reference Figure 3 , Figure 3 A schematic diagram of the frame structure of a blood pressure measuring device provided for an embodiment of the present application. In this embodiment of the present application, the blood pressure measuring device may include a main body 1 and an airbag 2. The main body 1 has a plurality of side walls, which are connected to enclose a cavity 101 of the main body 1, and the main functional modules and components of the blood pressure measuring device may be arranged in the cavity 101 of the main body 1. The airbag 2 may be fixed to a side wall of the main body 1, and the airbag 2 has an air cavity.

[0064] You can continue to refer to Figure 3 In this embodiment of the present application, the blood pressure measuring device may further include a supply and exhaust device 4 and a first air pressure sensor 5a, wherein the supply and exhaust device 4 and the first air pressure sensor 5a are arranged in the cavity 101 of the main body 1. The supply and exhaust device 4 includes an air inlet gas path 401 and an air deflation gas path 402, and both the air inlet gas path 401 and the air deflation gas path 402 are connected to the cavity 101 of the main body 1. In addition, the supply and exhaust device 4 is also connected to the air cavity of the airbag 2 through the first air path 61. In this way, the air in the cavity 101 of the main body 1 can enter the supply and exhaust device 4 through the air inlet gas path 401, and enter the airbag 2 through the first air path 61, so as to realize the inflation of the airbag 2 by the supply and exhaust device 4. On the contrary, when the gas in the airbag 2 needs to be discharged, the supply and exhaust device 4 extracts the gas in the airbag 2 through the first air path 61, and discharges it to the cavity 101 of the main body 1 through the air deflation gas path 402.

[0065] In addition, since the air intake path 401 and the air deflation path 402 of the air supply and exhaust device 4 do not work at the same time, in a possible embodiment of the present application, the air intake path 401 and the air deflation path 402 can be combined and arranged, that is, only one air path is arranged on the air supply and exhaust device 4, and the air supply and exhaust device 4 can inflate the airbag 2 through the air path, and can extract the gas in the airbag 2 through the air path, thereby simplifying the structure of the blood pressure measuring device.

[0066] In the present application, the specific structure of the air supply and exhaust device 4 is not limited. For example, the air supply and exhaust device 4 can be an air pump, and the volume of the air pump can be set according to the air bag 2 of the blood pressure measuring device for the air supply and exhaust and the size of the cavity 101 of the main body 1. Considering that the volume of the main body 1 of the current smart watch with blood pressure measurement function is small, the space of the cavity 101 is also small, so the volume of the air pump set in the smart watch is also small. In some possible embodiments of the present application, the air pump can be fixed to a structural member (not shown in the figure), and then the air pump can be installed on the main body 1 by fixing the structural member to the main body 1. The material of the structural member can be, but not limited to, metal or non-metal with high strength, so that it can provide reliable support for the air pump, thereby improving the structural reliability of the air pump. In the present application, the fixing method between the air pump and the structural member is not limited. For example, it can be fixedly connected by dispensing glue or threaded connection. In addition, in some embodiments of the present application, dispensing glue can also be performed around the air pump to seal the air pump with glue, so as to improve the structural stability of the air pump.

[0067] You can continue to refer to Figure 3 The blood pressure measuring device may further include a driving device 7, which is electrically connected to the air supply and exhaust device 4, and the driving device 7 may be used to provide driving force for the inflation and deflation process of the air supply and exhaust device 4. In the present application, the driving device 7 is not specifically limited, and illustratively, it may be a motor or the like.

[0068] When the first air pressure sensor 5a is specifically set, the first air pressure sensor 5a can be a differential pressure type air pressure sensor. In addition, the first air pressure sensor 5a has a first air hole 501 and a second air hole 502. Among them, the specific setting positions of the first air hole 501 and the second air hole 502 on the first air pressure sensor 5a are not limited. Exemplarily, the first air hole 501 and the second air hole 502 can be set at two end faces of the first air pressure sensor 5a that are set opposite to each other. In addition, the first air pressure sensor 5a can also include a pressure film (not shown in the figure), which is set between the first air hole 501 and the second air hole 502. When the air pressure at the first air hole 501 and the second air hole 502 is not equal, the pressure film will be deformed. The first air pressure sensor 5a can judge the air pressure difference between the first air hole 501 side and the second air hole 502 side according to the size and direction of the deformation of the pressure film.

[0069] exist Figure 3In the illustrated embodiment, the first air hole 501 of the first air pressure sensor 5a can be connected to the air cavity of the airbag 2 through the second air path 62. In addition, an air hole 102a is provided on the side wall of the main body 1, and the air hole 102a is connected to the outside atmosphere. The second air hole 502 of the first air pressure sensor 5a is connected to the air hole 102a through the third air path 63, so that the second air hole 502 is connected to the outside atmosphere. In the present application, the specific setting position of the air hole 102a is not limited, and it can be adjusted according to the structural design of the main body 1 and the specific setting position of the first air pressure sensor 5a. In addition, the present application does not limit the specific shape of the air hole 102a. For example, it can be a hole of regular shape such as a circular hole, an elliptical hole or a square hole, or it can be some possible irregular shape holes.

[0070] It can be seen that in the present application, the first air hole 501 side of the pressure film of the first air pressure sensor 5a is the air pressure in the airbag 2, while the second air hole 502 side of the pressure film is the atmospheric pressure. Therefore, the first air pressure sensor 5a is only used to detect the air pressure difference between the air pressure in the airbag 2 and the atmospheric pressure, and we usually think that the atmospheric pressure is constant, so the blood pressure value measured by the blood pressure measuring device provided by the present application is more accurate. In addition, since the air pressure difference measured by the first air pressure sensor 5a is not affected by the air pressure in the cavity 101 of the main body 1, the blood pressure measurement accuracy of the blood pressure measuring device is further improved.

[0071] In each embodiment of the present application, the specific configuration of each gas path is not limited, and it can be arranged in a straight line or in a curved line, and can be adaptively adjusted according to the components of the internal space of the blood pressure measurement device. It can be understood that in order to make the diagram clear, each gas path is illustrated as a straight line in each schematic diagram of the present application.

[0072] In addition, considering that the gas in each gas path (such as the first gas path 61, the second gas path 62 and the third gas path 63, etc.) may experience air flow fluctuations during the flow process, and the fluctuations in the air flow may cause fluctuations in the air pressure, thereby affecting the blood pressure measurement results. To solve this problem, refer to Figure 4a , Figure 4a The internal structure diagram of the gas circuit of an embodiment of the present application is shown. Figure 4a In the illustrated embodiment, a plurality of protrusions 602 are provided on the inner wall of the pipe 601 of the gas path. The plurality of protrusions 602 are spaced and alternately arranged along the extension direction of the pipe 601 to improve the air pressure fluctuation noise caused by air flow fluctuation, thereby achieving the purpose of improving the accuracy of blood pressure measurement.

[0073] In the present application, the specific configuration of the protrusion 602 is not limited, and its cross-sectional shape can be exemplarily Figure 4aThe circle shown in Figure 4b The rectangle shown in , or Figure 4c In some other embodiments of the present application, the protrusion 602 may also be in some possible irregular shapes, which are not listed here one by one, but they should all be understood to fall within the protection scope of the present application.

[0074] In the above embodiment of the present application, the first air pressure sensor 5a is connected to the air hole 102a on the side wall of the main body 1 through the second air path 62, so that the second air hole 502 of the first air pressure sensor 5a is connected to the outside atmosphere. In some possible embodiments of the present application, the air intake path 401 and the air release path 402 of the air supply and exhaust device 4 can also be directly connected to the outside atmosphere through the air holes opened on the side wall of the main body 1. Figure 5 , Figure 5 A schematic diagram of the structure of a blood pressure measuring device according to another embodiment of the present application is given. In this embodiment, the side wall of the main body 1 may also be provided with an air vent 102b and an air vent 102c, wherein the air inlet path 401 of the air supply and exhaust device 4 is connected to the outside atmosphere through the air vent 102b, and the air exhaust path 402 is connected to the outside atmosphere through the air vent 102c. In this way, during the operation of the air supply and exhaust device 4, the air in the outside atmosphere can be filled into the airbag 2 through the air inlet path 401 and the first air path 61. In addition, when the gas in the airbag 2 needs to be discharged, the air supply and exhaust device 4 extracts the gas in the airbag 2 through the first air path 61 and discharges it to the outside atmosphere through the deflation path 402. In this process, the air pressure in the cavity 101 of the main body 1 is not affected by the operation of the air supply and exhaust device 4, and it can be maintained in a stable state. The blood pressure measuring device provided by this embodiment can avoid the influence of the air pressure in the cavity 101 of the main body 1 on the normal operation of the air supply and exhaust device 4, thereby effectively improving the safety and working reliability of the blood pressure measuring device.

[0075] In order to ensure that the air supply and exhaust device 4 can work normally, in addition to the above-mentioned setting method of connecting the air intake path 401 and the air exhaust path 402 directly to the outside atmosphere through the air holes on the side wall of the main body 1, it can also be achieved by reducing the negative pressure in the cavity 101 of the main body 1. Among them, in the present application, reducing the negative pressure in the cavity 101 of the main body 1 refers to reducing the pressure difference between the cavity 101 and the outside atmosphere outside the main body 1.

[0076] In order to reduce the negative pressure in the cavity 101 of the main body 1, conventional blood pressure measuring devices usually have a vent hole 102d on the side wall of the main body 1, and no waterproof design is performed at the vent hole 102d. Figure 2In this way, the air in the cavity 101 of the main body 1 can be replenished in time, thereby ensuring the accuracy of blood pressure measurement.

[0077] However, most of the functional modules and components of the blood pressure measuring device are arranged in the cavity 101 of the main body 1. If the main body 1 is not waterproof, the functional modules and components in the cavity 101 of the main body 1 of the blood pressure measuring device are at great risk of damage, which will affect the service life of the blood pressure measuring device. Especially for smart watches or smart bracelets, which are often worn by users and have many application scenarios, the necessity of waterproof design is more significant.

[0078] Based on this, we can refer to Figure 6 In the embodiment of the present application, in order to reduce the negative pressure in the cavity 101 of the main body 1, an air hole 102d may be provided on the side wall of the main body 1, and the air hole 102d may be used to connect the cavity 101 of the main body 1 with the outside atmosphere, so as to replenish air to the cavity 101 in time, thereby reducing the negative pressure in the cavity 101 of the main body 1, so as to ensure the normal operation of the functional modules and devices in the main body 1. In the present application, the specific setting position of the air hole 102d is not limited, and it can be adjusted according to the structural design of the main body 1. In addition, the air hole 102a and the air hole 102d may be provided on the same side wall of the main body 1, or on different side walls.

[0079] In order to replenish the air to the cavity 101 in time, in some possible embodiments of the present application, the diameter of the air hole 102d can be larger, for example, greater than or equal to 1 mm. In addition, there can be multiple air holes 102d, and the multiple air holes 102d can be arranged in an array but are not limited to it.

[0080] exist Figure 6 In the embodiment shown, in order to make the whole blood pressure measuring device have better waterproof performance, a first waterproof breathable device 8 can be provided at the breathable hole 102d. The first waterproof breathable device 8 has both waterproof properties and allows air from the outside atmosphere to pass through to enter the cavity 101 of the main body 1. Figure 7 , Figure 7The schematic diagram of the structure of the first waterproof breathable device 8 provided by an embodiment of the present application is shown. The first waterproof breathable device 8 may include a plurality of stacked layer structures, for example, a foam 801, a balancing hole steel sheet 802, a polyethylene terephthalate (PET) layer and a waterproof membrane 804. Among them, the balancing hole steel sheet 802 is arranged between the foam 801 and the PET layer 803, and the foam 801 and the PET layer 803 can be bonded and fixed to the balancing hole steel sheet 802 respectively. Since the balancing hole steel sheet 802 has a large strength, it can play a supporting role for the entire waterproof breathable device. In addition, the waterproof membrane 804 can be arranged on the side of the PET layer 803 away from the balancing hole steel sheet 802, and the waterproof membrane 804 can be but not limited to being bonded and fixed to the PET layer 803 by a double-sided tape 805. When the waterproof breathable device is arranged on the main body 1, the side of the waterproof membrane 804 of the first waterproof breathable device 8 facing away from the PET layer 803 can be bonded and fixed to the side wall of the main body 1 by the waterproof glue 806, and the breathable hole 102d is covered.

[0081] In addition, in order to meet the requirements of the blood pressure measurement device for air flow during the blood pressure measurement process, in some embodiments of the present application, the air permeability of the first waterproof breathable device 8 can be set. For example, the air permeability of the first waterproof breathable device 8 can be greater than or equal to 100 ml / min. In some other embodiments of the present application, the setting area of ​​the first waterproof breathable device 8 can also be adjusted. For example, the area of ​​the first waterproof breathable device 8 can be greater than 10 mm^2.

[0082] By using the blood pressure measuring device provided by the present application, the air permeability of the entire blood pressure measuring device can be met by setting the air hole 102d. In addition, by setting the first waterproof and breathable device 8 at the air hole 102d, the blood pressure measuring device can have better waterproof and breathable performance, so that the blood pressure measuring device can be used in some scenes with higher waterproof level requirements, thereby expanding the applicable scenes of the blood pressure measuring device. In addition, during the blood pressure measurement process using the blood pressure measuring device provided by the present application, the pressure difference measured by the first air pressure sensor 5a is not affected by the air pressure in the cavity 101 of the main body 1, which makes the blood pressure value measured by the blood pressure measuring device more accurate.

[0083] From the introduction of the above embodiments, it can be known that the air hole 102a of the blood pressure measuring device provided in the embodiments of the present application is only used to connect the second air hole 502 of the first air pressure sensor 5a to the outside atmosphere. In some scenarios where the waterproof requirements for the first air pressure sensor 5a are not high, or the first air pressure sensor 5a itself has a waterproof structure, or the aperture of the air hole 102a is small, the air hole 102a may not be waterproofed, thereby simplifying the structure of the blood pressure measuring device. However, in some blood pressure measuring devices with higher waterproof requirements, a waterproof and breathable device may also be provided at the air hole 102a. Please continue to refer to Figure 3 In this embodiment, a second waterproof breathable device 9 is provided at the air hole 102a. The second waterproof breathable device 9 may be the same as the first waterproof breathable device 8 at the air hole 102d, or may be different, which is not specifically limited in the present application.

[0084] It is worth mentioning that in Figure 5 In the embodiment shown, the air inlet path 401 and the air outlet path 402 of the air supply and exhaust device 4 are directly connected to the outside atmosphere through the air holes provided on the side wall of the main body 1. Figure 5 In the illustrated embodiment, the side wall of the main body 1 may not be provided with the air hole 102d for connecting the cavity 101 with the outside atmosphere, so that the waterproof performance of the blood pressure measuring device is better. In addition, since the air holes 102b and the air holes 102c are used for the air intake and exhaust of the air supply and exhaust device 4, the size of the air holes 102b and the air holes 102c can be smaller, so that the waterproof and breathable devices may not be provided at the air holes 102b and the air holes 102c. However, in some blood pressure measuring devices with higher waterproof requirements, waterproof and breathable devices may also be provided at the air holes 102b and the air holes 102c. The waterproof and breathable devices may be provided with reference to the first waterproof and breathable devices 8 and the second waterproof and breathable devices 9 described above, and will not be described in detail here.

[0085] Because in Figure 6 In the embodiment shown, the air inside the cavity 101 of the main body 1 is mainly replenished through the air hole 102d, and a first waterproof air permeable device 8 is provided at the air hole 102d. If the first waterproof air permeable device 8 is blocked, its air permeability will be greatly reduced, thereby affecting the accuracy of the blood pressure measurement of the entire blood pressure measurement device. To solve this problem, please continue to refer to Figure 6 A second air pressure sensor 5b may also be provided in the cavity 101 of the main body 1 of the blood pressure measuring device. The second air pressure sensor 5b is an absolute pressure sensor. Assuming that the air pressure in the cavity 101 of the main body 1 is P1, the air pressure value measured by the second air pressure sensor 5b is P1.

[0086] In the present application, a first threshold value may be set for P1, so that when the air pressure value P1 measured by the second air pressure sensor 5b is less than the set first threshold value, it is determined that the air permeability of the first waterproof breathable device 8 is good. In the embodiment of the present application, the value of the first threshold value may be set according to the specific application scenario. For example, the first threshold value may be set to 95KPa, so that when the air pressure value P1 measured by the second air pressure sensor 5b is higher than 95KPa, it is considered that the air permeability of the first waterproof breathable device 8 is good.

[0087] In addition, when the air pressure value P1 measured by the second air pressure sensor 5b is lower than the first threshold value, it is determined that the first waterproof breathable device 8 is blocked. At this time, the user can replace or clean the first waterproof breathable device 8 to ensure the safety of the blood pressure measuring device and the stability of blood pressure measurement.

[0088] It is understandable that, in the present application, the first waterproof breathable device 8 can be arranged on the outside of the main body 1, or on the inside of the main body 1. In addition, the first waterproof breathable device 8 and the main body 1 can be fixed in a threaded locking or clamping manner, so as to achieve a detachable connection between the first waterproof breathable device 8 and the main body 1, thereby facilitating the replacement and cleaning of the first waterproof breathable device 8.

[0089] Reference Figure 8 , Figure 8 A schematic diagram of the framework structure of a blood pressure measurement device provided for another possible embodiment of the present application. Figure 8 The blood pressure measuring device of the embodiment shown is different from the above Figure 6 The embodiment shown differs mainly in that: Figure 8 In the illustrated embodiment, the blood pressure measurement device further includes an air path cavity 10, which is disposed in the cavity 101 of the main body 1. In addition, the air path cavity 10 can be fixed to the side of the side wall of the main body 1 facing the cavity 101 by, but not limited to, bonding or threaded connection, to improve the structural stability of the air path cavity 10.

[0090] Based on the above changes in the structure of the blood pressure measuring device, in this embodiment of the present application, the connection method between the first air pressure sensor 5a and the air supply and exhaust device 4 and the airbag 2 is also adaptively changed. Figure 8 The air supply and exhaust device 4 is connected to the air path cavity 10 through the first air path 61, and the first air hole 501 of the first air pressure sensor 5a is connected to the air path cavity 10 through the second air path 62. In this way, the first air path 61 and the second air path 62 can be connected through the air path cavity 10. In addition, the air path cavity 10 can be connected to the air cavity of the airbag 2 through the fourth air path 64. Figure 8Other structures of the blood pressure measurement device of the illustrated embodiment may be arranged with reference to any of the above embodiments and will not be described in detail here.

[0091] By adopting the blood pressure measurement device provided in this embodiment of the present application, by adding the design of the air path cavity 10, the air inlet path 401 and the deflated air path 402 of the air supply and exhaust device 4 can be connected to the air cavity of the airbag 2 through the air path cavity 10. When the air supply and exhaust device 4 is working, the air supply and exhaust device 4 can inhale the gas from the cavity 101 of the main body 1 into the air path cavity 10, and then enter the air cavity of the airbag 2. In addition, the air supply and exhaust device 4 can also discharge the gas in the air path cavity 10 through the deflated air path 402 to discharge the gas in the airbag 2.

[0092] In addition, after the first air pressure sensor 5a is connected to the air supply and exhaust device 4 through the air path cavity 10, it can be connected to the airbag 2 through only one air path (the fourth air path 64). Fig. 9 , Fig. 9 A possible embodiment of the present application is shown. Figure 8 The corresponding schematic diagram of the structure of the main body 1 of the blood pressure measuring device. Fig. 9 It can be seen that only one connection hole 103 for connecting with the airbag 2 can be provided on the side wall of the main body 1 of the blood pressure measuring device. Fig.10 , Fig.10 A possible embodiment of the present application is shown. Figure 8 The structure diagram of the airbag 2 of the corresponding blood pressure measuring device. In this embodiment, the airbag 2 can be provided with an air nozzle 201, which can be inserted into the above Fig. 9 An opening of the main body 1 shown in the figure is formed, thereby realizing a single air nozzle connection between the airbag 2 and the main body 1, which can effectively reduce the number of connection holes 103 of the whole blood pressure measuring device to improve the overall sealing of the blood pressure measuring device, and reduce the risk of damage to functional modules and devices in the cavity 101 of the main body 1 of the blood pressure measuring device, thereby helping to extend the service life of the blood pressure measuring device.

[0093] In addition, in the embodiment of the present application, the specific structure of the air nozzle 201 of the airbag 2 is not limited. For example, Fig.11 , Fig.11The schematic diagram of the structure of the air nozzle 201 of the airbag 2 provided in a possible embodiment of the present application is shown. The air nozzle 201 can protrude from the airbag 2 from one side surface of the airbag 2 in the direction toward the main body 1, and a clamping structure 2011 can be provided on the air nozzle 201. The clamping structure 2011 can be, but not limited to, an annular protruding structure protruding from the surface of the air nozzle 201. In this way, when the air nozzle 201 is plugged into the connecting hole 103, the air nozzle 201 can be clamped into the connecting hole 103 of the main body 1 through the clamping structure 2011. In addition, through reasonable design, the clamping structure 2011 can also play a role of waterproof sealing. In some possible embodiments of the present application, the air nozzle 201 can also be provided on the main body 1, and the connecting hole 103 can be provided on the airbag 2. In this case, the connection between the main body 1 and the airbag 2 can also be achieved by plugging the air nozzle and the connecting hole 103.

[0094] It is understandable that when the airbag 2 and the main body 1 are connected via a single air nozzle, the air path cavity 10 can be connected to the air nozzle 201 of the airbag 2 via the fourth air path 64 , thereby achieving communication between the air path cavity 10 and the air cavity of the airbag 2 .

[0095] It is worth mentioning that Figure 8 Other structures of the blood pressure measuring device shown in the figure can be arranged with reference to any of the above embodiments. Figure 8 When the side wall of the main body 1 of the blood pressure measuring device shown in the figure is provided with a vent hole 102b and a first waterproof venting device 8, the Figure 8 The second air pressure sensor 5b is provided in the cavity 101 of the blood pressure measuring device shown in the figure to detect the air permeability of the first waterproof breathable device. For another example, a protrusion may be provided in the pipelines of the first air path 61, the second air path 62 and the third air path 63. Fig.13 The specific configuration of other structures of the blood pressure measurement device shown will not be described in detail here.

[0096] In some embodiments of the present application, in order to ensure the safety of the blood pressure measuring device, a gas valve 11 may be provided in the blood pressure measuring device, and the gas valve 11 may be connected to the air supply and exhaust device 4, and may serve as a spare air release port of the air supply and exhaust device 4. Fig.12 , Fig.12 This is a schematic diagram of the framework structure of a blood pressure measuring device according to another possible embodiment of the present application. Fig.12 The blood pressure measuring device shown is Figure 8 By comparing the blood pressure measuring devices shown in the figure, it can be seen that the differences between the two embodiments are mainly as follows: Fig.12The blood pressure measuring device in the shown embodiment is also provided with an air valve 11, which includes two air ports, which can be defined as a first air port 1101 and a second air port 1102, respectively. The first air port 1101 can be connected to the air path cavity 10 via the fifth air path 65, and the second air port 1102 is connected to the cavity 101 of the main body 1 via the sixth air path 66.

[0097] In addition, from the above-mentioned introduction that the air intake path 401 and the air discharge path 402 of the air supply and exhaust device 4 are directly connected to the outside atmosphere through the air holes on the side wall of the main body 1, it can be known that in some embodiments of the present application, the second air port 1102 of the air valve 11 can also be directly connected to the outside atmosphere through the sixth air path 66 and the air holes opened on the side wall of the main body 1, so as to reduce the influence of the operation of the air valve 11 on the air pressure in the cavity 101 of the main body 1.

[0098] In this embodiment of the present application, since the deflated gas path 402 of the supply and exhaust device 4 is connected to the gas path cavity 10, the gas valve 11 can be connected to the deflated gas path 402 of the supply and exhaust device 4. In this way, in the case of failure of the deflated gas path 402 of the supply and exhaust device 4 or blockage of the deflated gas path 402, the deflation of the gas path cavity 10 can be achieved by opening the gas valve 11, thereby avoiding damage to the supply and exhaust device 4, the first air pressure sensor 5a or the airbag 2 and other devices, so as to ensure the safety of the blood pressure measurement device during the blood pressure measurement process.

[0099] In the present application, the specific setting form of the air valve 11 is not limited. Exemplarily, the air valve 11 can be a solenoid valve. In this way, the opening and closing of the air valve 11 can be programmed as needed, thereby simplifying the operation of the blood pressure measuring device to improve the user experience. For example, in a possible embodiment of the present application, the air valve 11 can be configured as follows: when the air pressure in the air circuit cavity 10 is greater than a certain value (such as 300 mmHg), the air valve 11 is electrically controlled to open and release air; and when the air pressure value in the air circuit cavity 10 drops to a certain value (such as 10 mmHg) or below, the air valve 11 is closed. Thereby, the air valve 11 can be adaptively opened or closed according to the air pressure value in the air circuit cavity 10, so that the air pressure in the entire air circuit system is maintained in a relatively stable state, so as to improve the reliability of the operation of the blood pressure measuring device.

[0100] From the introduction of the gas valve 11 in the above embodiment, it can be known that the safety performance of the blood pressure measuring device can be effectively improved by setting the gas valve 11. Based on this, in some possible embodiments of the present application, the gas valve 11 can also be set on the gas path (such as the first gas path 61, the third gas path 63 or the fourth gas path 64, etc.) of the blood pressure measuring device, so as to control the switch of the corresponding gas path through the gas valve 11, thereby realizing flexible control of the flow state of the gas in the gas path, so as to further improve the reliability of the operation of the blood pressure measuring device.

[0101] It is worth mentioning that Fig.12 Other structures of the blood pressure measuring device shown in the figure can be arranged with reference to any of the above embodiments. Fig.12 When the side wall of the main body 1 of the blood pressure measuring device shown in the figure is provided with a vent hole 102d and a first waterproof venting device 8, the Fig.12 The second air pressure sensor 5b is provided in the cavity 101 of the blood pressure measuring device shown in the figure to detect the air permeability of the first waterproof breathable device. For another example, a protrusion may be provided in the pipelines of the first air path 61, the second air path 62, the third air path 63 and the fourth air path 64. Fig.12 The specific configuration of other structures of the blood pressure measurement device shown will not be described in detail here.

[0102] In addition, in the present application, in order to improve the accuracy of the blood pressure measurement device for measuring the blood pressure value, a calibration device can be added to the first air pressure sensor 5a to calibrate the air pressure value in the air cavity of the airbag 2 measured by the first air pressure sensor 5a. Fig.13 , Fig.13 A schematic diagram of the framework structure of a blood pressure measuring device provided for another possible embodiment of the present application. In this embodiment, a third air pressure sensor 5c is added to the blood pressure measuring device. In this embodiment, the third air pressure sensor 5c can also be a differential pressure type air pressure sensor. The third air pressure sensor 5c includes a third air hole 503 and a fourth air hole 504. The third air hole 503 can be connected to the air path cavity 10 through the seventh air path 67 to achieve the connection between the third air hole 503 and the air cavity of the airbag 2. In addition, an air hole 102e is provided on the side wall of the main body 1, and the fourth air hole 504 of the third air pressure sensor 5c is connected to the outside atmosphere through the eighth air path 68. In the present application, the specific setting position of the air hole 102e is not limited, and it can be adjusted according to the structural design of the main body 1 and the specific setting position of the third air pressure sensor 5c. In addition, it is understandable that a third waterproof breathable device 12 may be provided at the breathable hole 102e. The third waterproof breathable device 12 may be provided with reference to the description of the first waterproof breathable device 8 at the breathable hole 102d in any of the above embodiments, which will not be described in detail here.

[0103] From the above introduction to the specific setting method of the third air pressure sensor 5c, it can be understood that the third air pressure sensor 5c and the first air pressure sensor 5a both measure the pressure difference between the air path cavity 10 and the outside atmosphere. Based on this, the pressure difference measured by the first air pressure sensor 5a can be compared with the pressure difference measured by the third air pressure sensor 5c to determine whether the measurement of the first air pressure sensor 5a is accurate. The judgment process may be, for example: when the difference between the pressure difference measured by the first air pressure sensor 5a and the pressure difference measured by the third air pressure sensor 5c is within the first threshold range, it is determined that the pressure difference measured by the first air pressure sensor 5a is accurate, and the blood pressure measurement device calculates the corresponding blood pressure value based on the pressure difference. In the present application, the first threshold range can be set according to the specific application scenario, and illustratively, it can be -200Pa to 200Pa.

[0104] In addition, when the difference between the pressure difference measured by the first air pressure sensor 5a and the pressure difference measured by the third air pressure sensor 5c is outside the first threshold range, it is judged that the pressure difference measured by the first air pressure sensor 5a is inaccurate, and the set of pressure difference data measured by the first air pressure sensor is discarded, and the next measurement is performed until the difference between the pressure difference measured by the first air pressure sensor 5a and the pressure difference measured by the third air pressure sensor 5c falls within the first threshold range, and the blood pressure measurement equipment calculates the corresponding blood pressure value based on the pressure difference.

[0105] It is worth mentioning that Fig.13 The other structures of the blood pressure measuring device in the embodiment shown can be arranged with reference to any of the above embodiments. Fig.13 When the side wall of the main body 1 of the blood pressure measuring device shown in the figure is provided with a vent hole 102d and a first waterproof venting device 8, the Fig.13 The second air pressure sensor 5b is provided in the cavity 101 of the blood pressure measuring device shown in the figure, so as to detect the air permeability of the first waterproof breathable device 8. For another example, a protrusion may be provided in the pipelines of the first air path 61, the second air path 62, the third air path 63, the fourth air path 64, the fifth air path 65, the sixth air path 66, the seventh air path 67 and the eighth air path 68. For another example, when the air path cavity 10 is not provided in the blood pressure measuring device, the third air hole 503 of the third air pressure sensor 5c may be directly connected to the air cavity of the airbag 2 through the seventh air path 67. Fig.13 The specific configuration of other structures of the blood pressure measurement device shown will not be described in detail here.

[0106] By using the blood pressure measuring device of this embodiment of the present application, by adding the third air pressure sensor 5c to calibrate the pressure difference measured by the first air pressure sensor 5a, the accuracy of the blood pressure measurement by the blood pressure measuring device can be effectively improved.

[0107] In the present application, the third air pressure sensor 5c can be used in addition to Fig.13 In addition to the differential pressure type air pressure sensor shown in , an absolute pressure type air pressure sensor can also be used. Fig.14 , Fig.14 The schematic diagram of the frame structure of the blood pressure measuring device of another possible embodiment of the present application is shown. In this embodiment, the third air pressure sensor 5c has only one third air hole, and the third air hole is connected to the air path cavity 10 through the seventh air path 67.

[0108] exist Fig.14 In the illustrated embodiment, the air pressure in the airbag 2 measured by the absolute pressure type third air pressure sensor 5c can be used to calibrate the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a. The calibration method can be, for example: when the difference between the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air cavity of the airbag 2 measured by the third air pressure sensor 5c is within the first threshold range, it is determined that the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a is accurate, and the blood pressure measuring device calculates the corresponding blood pressure value based on the air pressure. In the present application, the first threshold range can be set according to the specific application scenario, and illustratively, it can be -200Pa to 200Pa.

[0109] In addition, when the difference between the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air cavity of the airbag 2 measured by the third air pressure sensor 5c is outside the first threshold range, it is determined that the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor is inaccurate, and the set of air pressure data measured by the first air pressure sensor 5a is discarded, and the next measurement is performed until the difference between the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air cavity of the airbag 2 measured by the third air pressure sensor 5c falls within the first threshold range, and the blood pressure measuring device calculates the corresponding blood pressure value based on the air pressure.

[0110] From the introduction to the working principle of the first air pressure sensor 5a in the above embodiment, it can be known that the air pressure difference measured by the first air pressure sensor 5a is directly determined by the external atmospheric pressure and the air pressure in the air cavity of the airbag 2. Usually, we believe that the external atmospheric pressure is a constant value. Therefore, the air pressure value in the air cavity of the airbag 2 can be directly obtained by the pressure difference measured by the first air pressure sensor 5a and the external atmospheric pressure.

[0111] It is worth mentioning that Fig.14 The other structures of the blood pressure measuring device in the embodiment shown can be arranged with reference to any of the above embodiments. Fig.14When the side wall of the main body 1 of the blood pressure measuring device shown in the figure is provided with a vent hole 102d and a first waterproof venting device 8, the Fig.14 The second air pressure sensor 5b is provided in the cavity 101 of the blood pressure measuring device shown in the figure, so as to detect the air permeability of the first waterproof breathable device 8. For another example, a protrusion may be provided in the pipelines of the first air path 61, the second air path 62, the third air path 63, the fourth air path 64, the fifth air path 65, the sixth air path 66 and the seventh air path 67. For another example, when the air path cavity 10 is not provided in the blood pressure measuring device, the third air hole of the third air pressure sensor 5c may be directly connected to the air cavity of the airbag 2 through the seventh air path 67. Fig.14 The specific configuration of other structures of the blood pressure measurement device shown will not be described in detail here.

[0112] By using the blood pressure measuring device of this embodiment of the present application, by adding the setting of the third air pressure sensor 5c to calibrate the measurement result of the first air pressure sensor 5a, it can effectively improve the accuracy of the blood pressure measurement of the blood pressure measuring device.

[0113] Reference Fig.15 , Fig.15 This is a schematic diagram of the structure of a blood pressure measuring device provided in another embodiment of the present application. The structure of the blood pressure measuring device in this embodiment is different from any of the above embodiments, and the main difference is that the first air pressure sensor 5a is arranged inside the cavity 101 of the main body 1, and the air vent 102a is not arranged on the side wall of the main body 1, and the second air hole 502 of the first air pressure sensor 5a is connected to the cavity 101 of the main body 1. In this embodiment, the pressure difference measured by the first air pressure sensor 5a is determined by the air pressure in the cavity 101 of the main body 1 and the air pressure in the air cavity of the airbag 2.

[0114] In order to reduce the influence of the change of the air pressure in the cavity 101 of the main body 1 on the accuracy of the air pressure difference measured by the first air pressure sensor 5a, it is possible to continue to refer to Fig.15 A second air pressure sensor 5b may also be provided in the cavity 101 of the main body 1. The second air pressure sensor 5b is an absolute pressure sensor and is provided close to the first air pressure sensor 5a. The second air pressure sensor 5b is provided with only one fifth air hole 505, which is provided opposite to the second air hole 502 of the first air pressure sensor 5a. In a possible embodiment, the fifth air hole 505 may be provided coaxially with the second air hole 502, and the spacing between the fifth air hole 505 and the second air hole 502 is less than or equal to 1 mm.

[0115] Since the second air pressure sensor 5b includes only one fifth air hole 505, it can measure the air pressure in the cavity 101 of the main body 1. Since the distance between the fifth air hole 505 and the second air hole 502 is small, the air pressure measured on the side of the fifth air hole 505 and the air pressure measured on the side of the second air hole 502 can be considered equal.

[0116] In adopting this application Fig.15 When the blood pressure measuring device shown in the figure performs blood pressure measurement, when the air cavity of the airbag 2 is inflated by the air supply and exhaust device 4, the air in the cavity 101 of the main body 1 is pumped into the air cavity of the airbag 2. In this way, a low-pressure space lower than the atmospheric pressure is formed in the cavity 101 of the main body 1. Assuming that the air pressure in the cavity 101 of the main body 1 is P1 (the reading value of the absolute pressure sensor), the external atmospheric pressure is P0, and the air pressure in the air cavity of the airbag 2 is P. It can be understood that the air pressure P is the differential pressure value in the air cavity of the airbag 2, and its absolute pressure value is P+P0. The relationship between the above-mentioned air pressure values ​​is as follows: the reading value of the first air pressure sensor 5a: P2=P+P0-P1; therefore, the real air pressure in the airbag 2 is: P=P2-ΔP (ΔP=P0-P1), then P=P2-(P0-P1).

[0117] It can be understood that in this embodiment of the present application, although the air pressure in the main body 1 is low, by setting the second air pressure sensor 5b in the cavity 101 of the main body 1, the difference between the air pressure P0 of the outside atmosphere and the air pressure value measured by the second air pressure sensor 5b can be used as the error value for calculating the air pressure in the air cavity of the airbag 2, and the real air pressure value in the airbag 2 can be obtained. Thereby, the accuracy of blood pressure measurement of the blood pressure measuring device can be effectively improved.

[0118] In addition, in this embodiment of the present application, a first waterproof breathable device 8 can be provided at the air hole 102d of the blood pressure measuring device. In this way, while achieving waterproofness of the entire device, the accuracy of the blood pressure value measured by the blood pressure measuring device can also be guaranteed.

[0119] Since the second air pressure sensor 5b is disposed in the cavity 101 of the main body 1 and the second air pressure sensor 5b is an absolute pressure sensor, it can be understood from the above description of the detection of the blockage degree of the first waterproof breathable device 8 by setting the second air pressure sensor 5b that in the present application Fig.15In the illustrated embodiment, the degree of blockage of the first waterproof breathable device 8 can also be determined according to the magnitude of the air pressure value P1 measured by the second air pressure sensor 5b during the blood pressure measurement process. In specific implementation, a first threshold value can be set for P1. When the air pressure value P1 measured by the second air pressure sensor 5b is higher than the first threshold value, it is determined that the air permeability of the first waterproof breathable device 8 is good. And / or, when the air pressure value P1 measured by the second air pressure sensor 5b is lower than the first threshold value, it is determined that the air permeability of the first waterproof breathable device 8 is poor. At this time, the user can replace or clean the first waterproof breathable device 8 to ensure the safety of the blood pressure measuring device and the stability of the blood pressure measurement, so that the blood pressure value measured by the blood pressure measuring device is more accurate.

[0120] In the present application, the first waterproof breathable device 8 can be arranged on the outside of the main body 1, or on the inside of the main body 1. In addition, the first waterproof breathable device 8 and the main body 1 can be fixed in a threaded locking or clamping manner, so as to achieve a detachable connection between the first waterproof breathable device 8 and the main body 1, thereby facilitating the replacement and cleaning of the first waterproof breathable device 8.

[0121] It is worth mentioning that Fig.15 The other structures of the blood pressure measuring device of the embodiment shown can be arranged with reference to any of the above embodiments. For example, an air path cavity 10 can be arranged in the blood pressure measuring device, so that the air supply and exhaust device 4 is connected to the air path cavity 10 through the first air path 61, the first air hole 501 of the first air pressure sensor 5a can be connected to the air path cavity 10 through the second air path 62, and the air path cavity 10 is connected to the air bag 2 through the fourth air path 64, so as to realize the connection of a single air nozzle between the main body 1 and the air bag 2. Fig.15 The specific configuration of other structures of the blood pressure measurement device shown will not be described in detail here.

[0122] When the blood pressure measurement device provided by the present application is used for blood pressure measurement, the influence of the air pressure in the cavity 101 of the main body 1 of the blood pressure measurement device on the measurement value of the first air pressure sensor 5a can be effectively reduced, so that the blood pressure measurement result is more accurate. In addition, a first waterproof and breathable device 8 can be provided on the main body 1 of the blood pressure measurement device to achieve a waterproof design of the blood pressure measurement device. In addition, the air permeability of the first waterproof and breathable device 8 can be detected by the provision of the second air pressure sensor 5b to avoid the blockage of the first waterproof and breathable device 8 affecting the measurement result of the blood pressure measurement device.

[0123] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A blood pressure measuring device, characterized in that: It includes a main body, an air supply and exhaust device and a first air pressure sensor, wherein: The main body includes a cavity, and the cavity is formed by a plurality of side walls; the air supply and exhaust device and the first air pressure sensor are arranged in the cavity; The main body includes an end portion, and the end portion is used to connect to the airbag; The air supply and exhaust device comprises an air intake path and an air deflation path, and the air supply and exhaust device is used to communicate with the air cavity of the airbag through a first air path; The first air pressure sensor includes a first air hole, a second air hole and a pressure film, and the pressure film is located between the first air hole and the second air hole; the side wall is provided with a first air hole, and the first air hole is used to communicate with the air cavity of the airbag through a second air path, and the second air hole is connected to the first air hole through a third air path, so that the first air pressure sensor is connected to the outside atmosphere via the first air hole.

2. The blood pressure measuring device according to claim 1, characterized in that: The side wall is also provided with a second air hole, and a first waterproof and breathable device is arranged at the second air hole.

3. The blood pressure measuring device according to claim 2, characterized in that: The air permeability of the first waterproof breathable device is greater than or equal to 100 ml / min.

4. The blood pressure measuring device according to claim 2 or 3, characterized in that: The blood pressure measurement device also includes a second air pressure sensor, which is disposed in the cavity of the main body. The blood pressure measurement device also determines the air permeability of the first waterproof breathable device according to the air pressure value measured by the second air pressure sensor.

5. The blood pressure measuring device according to claim 4, characterized in that: The second air pressure sensor is an absolute pressure sensor; When the air pressure value measured by the second air pressure sensor is higher than a first threshold value, it is determined that the air permeability of the first waterproof breathable device is good; And / or, when the air pressure value measured by the second air pressure sensor is lower than the first threshold, it is determined that the first waterproof breathable device is blocked.

6. The blood pressure measuring device according to any one of claims 1 to 5, characterized in that: The blood pressure measurement device further comprises an air path cavity, wherein the air path cavity is disposed in the cavity of the main body; The air supply and exhaust device is connected to the air path cavity through the first air path, the first air hole of the first air pressure sensor is connected to the air path cavity through the second air path; the air path cavity is connected to the air cavity of the airbag through a fourth air path.

7. The blood pressure measuring device according to claim 6, characterized in that: The blood pressure measurement device also includes an air valve, which includes a first air port and a second air port. The first air port is connected to the air path cavity through a fifth air path, and the second air port is connected to the cavity of the main body through a sixth air path.

8. The blood pressure measuring device according to claim 6 or 7, characterized in that: The blood pressure measurement device also includes a third air pressure sensor, which includes a third air hole and a fourth air hole; the side wall of the main body is also provided with a third air hole, the third air hole is connected to the air path cavity through the seventh air path, and the fourth air hole is connected to the third air hole through the eighth air path.

9. The blood pressure measuring device according to claim 8, characterized in that: When the difference between the pressure difference measured by the first air pressure sensor and the pressure difference measured by the third air pressure sensor is within a first threshold range, it is determined that the pressure difference measured by the first air pressure sensor is accurate; And / or, when the difference between the pressure difference measured by the first air pressure sensor and the pressure difference measured by the third air pressure sensor is outside a first threshold range, it is determined that the pressure difference measured by the first air pressure sensor is inaccurate.

10. The blood pressure measuring device according to claim 6 or 7, characterized in that: The blood pressure measurement device also includes a third air pressure sensor, which is an absolute pressure sensor; the third air pressure sensor includes a third air hole, and the third air hole is connected to the air path cavity through a seventh air path.

11. The blood pressure measuring device according to claim 10, characterized in that: When the difference between the air pressure in the airbag measured by the first air pressure sensor and the air pressure in the airbag measured by the third air pressure sensor is within a first threshold range, it is determined that the air pressure in the airbag measured by the first air pressure sensor is accurate; And / or, when the difference between the air pressure inside the airbag measured by the first air pressure sensor and the air pressure inside the airbag measured by the third air pressure sensor is outside a first threshold range, it is determined that the air pressure inside the airbag measured by the first air pressure sensor is inaccurate.

12. The blood pressure measuring device according to any one of claims 1 to 11, characterized in that: The side wall of the main body is also provided with a fourth air hole and a fifth air hole, the air intake path of the air supply and exhaust device is connected to the outside atmosphere through the fourth air hole, and the air discharge path is connected to the outside atmosphere through the fifth air hole.

13. The blood pressure measuring device according to any one of claims 1 to 12, characterized in that: A second waterproof and breathable device is also provided at the first air hole.

14. The blood pressure measuring device according to any one of claims 1 to 13, characterized in that: The inner wall of the pipe of the second gas path is provided with a plurality of protrusions, and the plurality of protrusions are spaced and alternately arranged along the extending direction of the pipe.

15. The blood pressure measuring device according to any one of claims 1 to 14, characterized in that: The blood pressure measuring device further comprises the air bag, which is detachably connected to the main body.

16. The blood pressure measuring device according to claim 15, characterized in that: A connecting hole is provided at the end of the main body, and the airbag has an air nozzle, which protrudes from the airbag along the direction toward the main body from one side surface of the airbag; the air nozzle is inserted into the connecting hole, and the fourth air path is connected to the air nozzle.

17. The blood pressure measuring device according to any one of claims 1 to 16, characterized in that: The blood pressure measurement device further includes a photoplethysmograph (PPG) module and an ECG detection module, and the PPG module and the ECG detection module are arranged on the bottom surface of the main body.

18. A blood pressure measuring device, characterized in that: It includes a main body, an air supply and exhaust device, a first air pressure sensor and a second air pressure sensor, wherein: The main body includes a cavity, and the cavity is formed by a plurality of side walls; the air supply and exhaust device, the first air pressure sensor and the second air pressure sensor are arranged in the cavity; The main body includes an end portion, and the end portion is used to connect to the airbag; The air supply and exhaust device comprises an air intake path and an air deflation path, and the air supply and exhaust device is used to communicate with the air cavity of the airbag through a first air path; The first air pressure sensor includes a first air hole, a second air hole and a pressure film, wherein the pressure film is located between the first air hole and the second air hole; the side wall is provided with a first air hole, wherein the first air hole is used to communicate with the air cavity of the airbag through a second air path, and the second air hole is communicated with the cavity; The second air pressure sensor is an absolute pressure type air pressure sensor, and the second air pressure sensor includes a fifth air hole, and the fifth air hole is arranged opposite to the second air hole.

19. The blood pressure measuring device according to claim 18, wherein: The blood pressure measurement device obtains the air pressure value in the air cavity of the airbag according to the external atmospheric pressure, the air pressure value measured by the second air pressure sensor, and the pressure difference measured by the first air pressure sensor.

20. The blood pressure measuring device according to claim 18 or 19, characterized in that: The fifth air hole is coaxially arranged with the second air hole.

21. The blood pressure measuring device according to claim 20, characterized in that The distance between the fifth air hole and the second air hole is less than or equal to 1 mm.

22. The blood pressure measuring device according to any one of claims 18 to 21, characterized in that: The side wall is also provided with an air hole, and a waterproof air-permeable device is provided at the air hole; when the air pressure value measured by the second air pressure sensor is higher than the first threshold value, it is determined that the air permeability of the waterproof air-permeable device is good; And / or, when the air pressure value measured by the second air pressure sensor is lower than a first threshold, it is determined that the waterproof breathable device is blocked.

23. A blood pressure measuring device, characterized in that: It includes a main body, an air supply and exhaust device, a first air pressure sensor, a second air pressure sensor and a waterproof and breathable device, wherein: The main body includes a cavity, and the cavity is formed by a plurality of side walls; the air supply and exhaust device, the first air pressure sensor and the second air pressure sensor are arranged in the cavity; The side wall is provided with a vent hole, and the waterproof vent device covers the vent hole; The main body includes an end portion, and the end portion is used to connect to the airbag; The first air pressure sensor is used to measure the air pressure in the air cavity of the airbag; The air supply and exhaust device comprises an air intake path and an air deflation path, and the air supply and exhaust device is used to communicate with the air cavity of the airbag through a first air path; The second air pressure sensor is an absolute pressure sensor. When the air pressure value measured by the second air pressure sensor is higher than a first threshold value, it is determined that the air permeability of the waterproof breathable device is good; and / or, when the air pressure value measured by the second air pressure sensor is lower than the first threshold value, it is determined that the waterproof breathable device is blocked.

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