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] This application is a divisional application, the original application number is 202110869082.3, the original application date is July 30, 2021, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic devices, in particular to a blood pressure measuring device. BACKGROUND

[0003] People today pay more and more attention to their own and their family's health conditions, and blood pressure measurement is particularly important among them. With the progress and development of science and technology, not only have household blood pressure measuring devices appeared, but blood pressure measurement functions have also begun to be integrated into some wearable devices (such as smart watches or smart bracelets, etc.), which provide the possibility for users to measure blood pressure anytime and anywhere.

[0004] Current blood pressure measuring devices directly place micro-pumps and pressure sensors inside the main body of the blood pressure measuring device. The pressure sensor can measure the air pressure inside the main body and the air pressure of the air bag to obtain the blood pressure value of the user. However, in the process of applying the blood pressure measuring device to measure blood pressure, the micro-pump will charge the gas inside the main body into the air bag, which will cause the air pressure inside the main body to fluctuate, 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.

[0005] Therefore, how to provide a blood pressure measuring device that can meet the blood pressure measurement accuracy has become a difficult problem for those skilled in the art to solve. SUMMARY

[0006] 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.

[0007] In a first aspect, the present application provides a blood pressure measuring device, which can 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 various functional modules or devices of the blood pressure measuring device can be arranged in the cavity, such as the air supply and exhaust device and the first air pressure sensor. The air bag is fixed to one end of the main body and has an air cavity. The air supply and exhaust device includes an air inlet path and an air exhaust path, and is connected to the air cavity of the air bag through a first air path. The first air pressure sensor includes a first air hole, a second air hole, and a pressure diaphragm 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 a second air path. In addition, the cavity of the main body can be formed by a plurality of side walls, and a first air permeable hole can be formed in the side wall, which 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 permeable hole through a third air path, so that the first air pressure sensor is connected to the outside atmosphere through the first air permeable hole. The blood pressure measuring device provided by the present application has high blood pressure measurement accuracy because the pressure diaphragm of the first air pressure sensor is not affected by the air pressure in the cavity during blood pressure measurement.

[0008] Because the air supply and exhaust device is arranged in the cavity of the main body, if the air inlet path and the air exhaust path of the air supply and exhaust device are both connected to the cavity of the main body, a negative pressure (the difference between the inside and outside air pressures, i.e. the air pressure inside the cavity of the main body is less than the atmospheric pressure) will be generated in the cavity of the main body during the operation of the air supply and exhaust device. In traditional blood pressure measuring devices, no waterproof design is performed to reduce the negative pressure inside the cavity of the main body. The main reason is that the arrangement of a waterproof film will reduce the air permeability of the blood pressure measuring device, thereby increasing the negative pressure in the cavity of the main body and increasing the system error during blood pressure measurement. In addition, the air pressure value and its fluctuation inside the cavity of the main body will also cause errors in blood pressure measurement. However, most of the devices of the blood pressure measuring device are arranged in the cavity of the main body, and if the main body is not waterproof, the devices in the cavity of the main body of the blood pressure measuring device are at high risk of damage, which will affect the service life of the blood pressure measuring device. To solve this problem, in one possible implementation of the present application, a second air permeable hole can be formed in the side wall of the main body, which is connected to the outside atmosphere, so that the outside air can enter the cavity of the main body through the second air permeable hole, thereby supplementing the air in the cavity of the main body in time to reduce the negative pressure in the cavity.

[0009] In addition, in order to realize the waterproof design of the blood pressure measuring device, the first waterproof air permeation device can be arranged at the second air permeation hole. In order to reduce the influence of the arrangement of the first waterproof air permeation device on the air permeation amount at the second air permeation hole, the air permeation amount of the first waterproof air permeation device can be greater than or equal to 100 ml / min, so that the gas in the cavity of the main body can be supplemented in time and stably.

[0010] However, when the first waterproof air permeation device is blocked, the air permeation amount thereof will be greatly reduced, thereby causing an increase in the negative pressure in the cavity. In a possible implementation of the present application, the blocking of the first waterproof air permeation device can be determined by detecting the air permeation performance of the first waterproof air permeation device. In a specific implementation, the blood pressure measuring device can further include a second air pressure sensor arranged in the cavity of the main body, and the blood pressure measuring device can determine the air permeation performance of the first waterproof air permeation device according to the air pressure value measured by the second air pressure sensor. The second air pressure sensor can be an absolute pressure sensor, and when the air pressure value measured by the second air pressure sensor is higher than a first threshold value, it can be determined that the air permeation performance of the first waterproof air permeation device is good. In the present application, the first threshold value can be set according to a specific application scenario, and for example, it can be 95 Kpa. When the air pressure value measured by the second air pressure sensor is higher than 95 Kpa, it is determined that the air permeation performance of the first waterproof air permeation device is good.

[0011] 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 first waterproof air permeation device is blocked.

[0012] It can be understood that in the present application, a second waterproof air permeation device can also be arranged at the first air permeation hole to further improve the waterproof performance of the blood pressure measuring device.

[0013] As can be known from the above introduction of the present application, one of the reasons for the generation of the negative pressure in the cavity of the main body is the inflation and deflation of the air bag by the air supply and exhaust device. In order to reduce the influence 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 permeation hole and a fifth air permeation hole can also be arranged, and the air inlet path of the air supply and exhaust device can be in communication with the outside atmosphere through the fourth air permeation hole, and the air exhaust path can be in communication with the outside atmosphere through the fifth air permeation hole. In this way, the air supply and exhaust device can charge the gas in the outside atmosphere into the air bag through the fourth air permeation hole and the air inlet path, and can exhaust the gas in the air bag to the outside atmosphere through the air exhaust path and the fifth air permeation hole.

[0014] In the present application, the air supply and exhaust device and the first air pressure sensor can be directly connected with the air bag through corresponding air paths, or indirectly connected. For example, in one possible implementation of the present application, the blood pressure measuring device can further comprise an air path cavity arranged in the cavity of the main body. In addition, the air supply and exhaust device can be connected with the air path cavity through a first air path, the first air hole of the first air pressure sensor can be connected with the air path cavity through a second air path, and the air path cavity is connected with the air cavity of the air bag through a fourth air path. In this way, the air paths of the air supply and exhaust device and the first air pressure sensor for connecting with the air bag can be combined through the air path cavity first, and then connected with the air bag through an air path. At this time, only one through hole for connecting with the air bag needs to be provided on the side wall of the main body, so as to reduce the number of holes on the main body, thereby improving the waterproof performance and structural stability of the blood pressure measuring device.

[0015] In one possible implementation of the present application, in order to connect the air bag with the main body, a connecting hole can be arranged at the end of the main body. In addition, the air bag has an air nozzle, which protrudes from the air bag in a direction towards the main body from a side surface of the air bag. In this way, the air nozzle can be inserted into the connecting hole, and the fourth air path is connected with the air nozzle, to realize the connection between the air bag and the air path cavity. Similarly, in other possible implementations, the air nozzle can be arranged at the end of the main body, and the connecting hole can be arranged on the air bag, so that the air nozzle and the connecting hole can be inserted to realize the connection between the air bag and the main body.

[0016] It is worth mentioning that, in the present application, the air bag and the main body can be detachably connected, so that the air bag can be disassembled or replaced as needed. In addition, in one possible implementation of the present application, the blood pressure measuring device can further comprise a photoplethysmography (PPG) module and an ECG detection module, and the PPG module and the ECG detection module can be arranged on the bottom surface of the main body. The air bag can also be fixedly connected with one end of the bottom surface of the main body, so as to integrate multiple measurement functions into the blood pressure measuring device, and make the structure of the blood pressure measuring device more compact.

[0017] In order to further improve the blood pressure measurement accuracy of the blood pressure measuring device, in the present application, a calibration device can be arranged for the first air pressure sensor. In one possible implementation of the present application, the blood pressure measuring device can further comprise a third air pressure sensor, which comprises a third air hole and a fourth air hole. In addition, a third air hole is provided on the side wall of the main body, which is connected with the outside atmosphere. The third air hole of the third air pressure sensor is connected with the air path cavity through a seventh air path, and the fourth air hole is connected with the third air hole through an eighth air path. In this way, the third air pressure sensor can measure the air pressure difference between the outside atmosphere and the air cavity of the air bag.

[0018] Since the first air pressure sensor also measures the air pressure difference between the external atmosphere and the air cavity of the air bag, the measurement value of the first air pressure sensor can be calibrated by comparing the air pressure differences measured by the first air pressure sensor and the third air pressure sensor. Specifically, 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. In this application, the first threshold range can be set according to the specific application scenario. For example, it can be -200pa~200pa.

[0019] 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.

[0020] In addition to the above-mentioned setting mode, the third air pressure sensor for calibrating the measurement value of the first air pressure sensor can also be an absolute pressure sensor in a possible implementation manner of the present application. In this implementation manner, the third air pressure sensor only includes a third air hole, which can be connected to the air path cavity through a seventh air path. The process of calibrating the measurement value of the first air pressure sensor by the third air pressure sensor is as follows: when the difference between the air pressure in the air bag measured by the first air pressure sensor and the air pressure in the air bag measured by the third air pressure sensor is within a first threshold range, it is determined that the air pressure in the air bag measured by the first air pressure sensor is accurate; and / or when the difference between the air pressure in the air bag measured by the first air pressure sensor and the air pressure in the air bag measured by the third air pressure sensor is outside the first threshold range, it is determined that the air pressure in the air bag measured by the first air pressure sensor is inaccurate. By using this implementation manner, the number of air holes opened on the main body can be reduced, thereby improving the waterproof performance of the blood pressure measuring device.

[0021] In this application, in order to reduce the influence of the fluctuation of the gas flow in the air path on the measurement accuracy, a buffer structure can be arranged in the pipeline of the air path. For example, a plurality of protrusions can be arranged in the pipeline of the second air path connecting the first air pressure sensor and the air bag, 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 during the flow of the gas in the second air path, thereby reducing the fluctuation of the gas flow and improving the accuracy of the detection of the first air pressure sensor.

[0022] In a second aspect, the present application also provides a blood pressure measuring device, which can include a main body, an air bag, an air supply and exhaust device, a first air pressure sensor and a second air pressure sensor. The main body includes a cavity, and various functional modules or devices of the blood pressure measuring device can be arranged in the cavity, such as the air supply and exhaust device, the first air pressure sensor and the second air pressure sensor. The air bag is fixed to one end of the main body and has an air cavity. The air supply and exhaust device includes an air inlet path and an air outlet path, and is connected to the air cavity of the air bag through a first air path. The first air pressure sensor includes a first air hole, a second air hole and a pressure diaphragm, the pressure diaphragm 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 a second air path, and the second air hole is connected to the cavity. 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 sensor, and the second air pressure sensor includes a fifth air hole which is arranged opposite to the second air hole.

[0023] The blood pressure measuring device provided by the present application can obtain the air pressure value in the air cavity of the air bag according to the atmospheric pressure, the air pressure value measured by the second air pressure sensor and the pressure difference measured by the first air pressure sensor by arranging the second air pressure sensor in the cavity of the main body. In addition, the difference between the 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 air bag, and the real air pressure value in the air bag can be obtained, thereby effectively improving the accuracy of blood pressure measurement of the blood pressure measuring device.

[0024] In a possible implementation of the present application, the fifth air hole can be coaxially arranged with the second air hole, and the distance between the fifth air hole and the second air hole can be less than or equal to 1 mm. Since the second air pressure sensor only includes one fifth air hole, it can measure the air pressure in the cavity of the main body. Since the distance between the fifth air hole and the second air hole is small, the air pressure measured on the side of the fifth air hole can be considered equal to the air pressure measured on the side of the second air hole.

[0025] In a possible implementation of the present application, the side wall of the main body is further provided with a gas permeation hole, and a waterproof gas permeation device is arranged at the gas permeation hole. At this time, the blood pressure measuring device can further determine the gas permeation performance of the waterproof gas permeation 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 gas permeation performance of the waterproof gas permeation 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 95 KPa. When the air pressure value measured by the second air pressure sensor is higher than 95 KPa, it is determined that the gas permeation performance of the waterproof gas permeation 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 gas permeation device is blocked. By detecting the gas permeation performance of the waterproof gas permeation device, the waterproof gas permeation device can be replaced or cleaned in time when it is blocked, so as to reduce the negative pressure in the cavity of the main body, thereby improving the measurement accuracy of the blood pressure measuring device.

[0026] In a third aspect, the present application further provides a blood pressure measuring device, which can 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 gas permeation device. The main body includes a cavity, and various functional modules or devices of the blood pressure measuring device can be arranged in the cavity, for example, the 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, the side walls are provided with gas permeation holes, and the waterproof gas permeation device covers the gas permeation 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 inlet path and an air outlet path, and the air supply and exhaust device is connected with 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 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 gas permeation performance of the waterproof gas permeation 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 gas permeation device is blocked.

[0027] By arranging the second air pressure sensor in the cavity of the main body, the blood pressure measuring device provided by the present application can detect the gas permeation performance of the waterproof gas permeation device, so that the waterproof gas permeation device can be replaced or cleaned in time, thereby ensuring 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 DRAWINGS

[0028] Figure 1 The structural schematic diagram of the blood pressure measuring device provided by an embodiment of the present application is shown in the figure; Figure 2 The frame structure schematic diagram of the existing blood pressure measuring device provided by an embodiment of the present application is shown in the figure; Figure 3 A frame structure schematic diagram of a blood pressure measuring device provided by an embodiment of the present application; Figures 4a to 4c An internal structure schematic diagram of an air path provided by an embodiment of the present application; Figure 5 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application; Figure 6 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application; Figure 7 An explosion structure schematic diagram of a waterproof and breathable device provided by an embodiment of the present application; Figure 8 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application; Figure 9 A partial structure schematic diagram of a blood pressure measuring device provided by an embodiment of the present application; Figure 10 A structure schematic diagram of an air bag provided by an embodiment of the present application; Figure 11 A Figure 10 An enlarged view of a partial structure at A in FIG. 1; Figure 12 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application; Figure 13 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application; Figure 14 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application; Figure 15 A frame structure schematic diagram of a blood pressure measuring device provided by another embodiment of the present application.

[0029] Reference signs: 1 - main body; 101 - cavity; 102a, 102b, 102c, 102d, 102e - air permeable hole; 103 - connecting hole; 104 - PPG module; 105 - ECG detection module; 2 - air bag; 201 - air cock; 2011 - clamping structure; 3 - wrist strap; 4 - air supply and exhaust device; 401 - air inlet path; 402 - air outlet path; 5a - first air pressure sensor; 501 - first air hole; 502 - second air hole; 5b - second air pressure sensor; 505 - fifth air hole; 5c - third air pressure sensor; 503 - third air hole; 504 - fourth air hole; 61 - first air path; 62 - second air path; 63 - third air path; 64 - fourth air path; 65 - fifth air path; 66 - sixth air path; 67 - seventh air path; 601 - pipe; 602 - protrusion; 7 - driving device; 8 - first waterproof air permeable device; 801 - foam; 802 - balance hole steel sheet; 803 - PET layer; 804 - waterproof film; 805 - double-sided adhesive tape; 806 - waterproof adhesive; 9 - second waterproof air permeable device; 10 - air path cavity; 11 - air valve; 12 - third waterproof air permeable device. DETAILED DESCRIPTION

[0030] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the drawings.

[0031] In order to facilitate the understanding of the blood pressure measuring device provided by the embodiments of the present application, the application scenario thereof will be first described below. The blood pressure measuring device can be, but is not limited to, a medical, household or other large-volume device for blood pressure measurement, and can also be a smart watch, a smart bracelet or other portable electronic device with blood pressure measurement function. Taking the smart watch as an example, it can be worn on the wrist of a user to be able to detect the blood pressure and other physical signs of the user at any time, so as to realize the prediction of the physical state, thereby effectively avoiding the dangerous secondary symptoms such as stroke caused by high blood pressure.

[0032] REFERENCE Figure 1 , Figure 1 The structural schematic diagram of a smart watch with blood pressure measurement function provided by an embodiment of the present application is shown in FIG. 1. The blood pressure measuring device with blood pressure detection function generally can include a main body 1 and an air bag 2, and the air bag 2 can be fixed to one end of the main body 1. Exemplarily, the air bag 2 can be fixed to one 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 measuring device can also include a wrist strap 3, as shown in FIG. 2, the air bag 2 can be located on the side of the wrist strap 3 facing the wrist of the user. In this way, when the wrist strap 3 is wound around the wrist of the user, the air bag 2 can be pressed towards the wrist and made to conform to the wrist, thereby facilitating the measurement of the blood pressure of the user. It can be understood that the air bag 2 and the wrist strap 3 can be fixed by means of clamping, bonding or riveting, etc., so as to reduce the friction force generated by the mutual movement between the air bag 2 and the wrist strap 3, thereby reducing the risk of air bag wear and tear, and improving the service life of the blood pressure measuring device. Figure 1

[0033] ​In addition to the aforementioned structure, smartwatches with blood pressure measurement capabilities typically also include a photoplethysmograph (PPG) module. The PPG module 104 can be located on the bottom surface of the main body 1, or it can be positioned in the middle region of the bottom surface of the main body 1 (see [reference]). Figure 1 The circular area in the middle of the bottom surface of the main body 1 (shown as an example) is designed to improve the detection accuracy of the PPG module 104. Since the PPG module 104 can continuously measure the human heart rate, by simultaneously installing the airbag 2 and the PPG module 104 on the smartwatch, 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 challenge of continuous blood pressure measurement can be solved through precise algorithm calculations.

[0034] You can continue to refer to Figure 1 The smartwatch in this embodiment can also be equipped with an electrocardiogram (ECG) detection module. This ECG detection module 105 can be located on the bottom surface of the main body 1. Alternatively, the ECG detection module 105 can be located in the middle area of ​​the main body 1, and exemplarily, it can be located around the PPG module 104 (see [link to relevant documentation]). Figure 1 The two arc-shaped areas in the middle of the bottom surface of the main body 1 shown below enable the electrocardiogram detection function of the smartwatch.

[0035] Can be referred to together Figure 2 , Figure 2 A schematic diagram of the framework structure of a conventional blood pressure measuring device is shown. The main body 1 has a cavity 101. The main functional modules and components of the blood pressure measuring device (such as processors and sensors) are housed within the cavity 101 of the main body 1, for example, the air supply / air release device 4 and the first pressure sensor 5a. One end of the airbag 2 is connected to the air supply / air release device 4 and the first pressure sensor 5a via an air nozzle. The airbag 2 can be worn around the user's wrist. When using this blood pressure measuring device to measure blood pressure, the airbag 2 can be inflated or deflated via the air supply / air release device 4. The first pressure sensor 5a detects the air pressure within the cavity 101 of the main body 1 and the air pressure in the airbag 2 during the inflation / deflation process. Thus, the user's blood pressure value can be obtained through an algorithm based on these two pressure values.

[0036] From the above introduction of the process of measuring blood pressure 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 in the process of inflating the air bag 2. In this way, the air pressure in the cavity 101 of the main body 1 is 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 a negative pressure is generated in the cavity 101 of the main body 1, and the existence of the negative pressure will cause errors in the blood pressure measuring process. In addition, the air pressure in the cavity 101 of the main body 1 fluctuates in the process of inflating and deflating the air bag 2 by the air supply and exhaust device 4, and the fluctuation of the air pressure will also cause errors in the blood pressure measurement.

[0037] Therefore, the embodiments of the present application provide 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 the blood pressure measurement, so as to improve the accuracy of the blood pressure measurement. For the convenience of understanding, the specific structure of the blood pressure measuring device is described in detail below with the smart watch as an example.

[0038] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and the appended claims, the singular forms “a,” “an” and “the” are intended to include both singular and plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and / or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term “and / or” used in the context of the present application refers to a conjunctive relationship with the conjunction “and” and a disjunctive relationship with the conjunction “or”, unless otherwise specified.

[0039] Reference in the specification to “one embodiment” or “some embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase “in one embodiment” or “in some embodiments” in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms “comprise,” “comprising,” “include,” “including,” and “has” or “having” (and its inflectional forms) used in the specification, are used generically and are intended to mean either “including but not limited to,” or “consisting entirely of.”

[0040] Referring toFigure 3 , Figure 3 A schematic diagram of a frame structure of a blood pressure measuring device is provided in an embodiment of the present application. In this embodiment of the present application, the blood pressure measuring device can include a main body 1 and an air bag 2. The main body 1 has a plurality of side walls connected to each other to form a cavity 101 of the main body 1, and main functional modules and devices of the blood pressure measuring device can be arranged in the cavity 101 of the main body 1. The air bag 2 can be fixed to one side wall of the main body 1, and the air bag 2 has an air cavity.

[0041] Continuing to refer to Figure 3 In this embodiment of the present application, the blood pressure measuring device can further include an air supply and exhaust device 4 and a first air pressure sensor 5a, which are arranged in the cavity 101 of the main body 1. The air supply and exhaust device 4 includes an air inlet path 401 and an air exhaust path 402, both of which are connected to the cavity 101 of the main body 1. In addition, the air supply and exhaust device 4 is connected to the air cavity of the air bag 2 through a first air path 61. In this way, air in the cavity 101 of the main body 1 can enter the air supply and exhaust device 4 through the air inlet path 401 and enter the air bag 2 through the first air path 61, thereby realizing the inflation of the air bag 2 by the air supply and exhaust device 4. Conversely, when the gas in the air bag 2 needs to be exhausted, the air supply and exhaust device 4 can extract the gas in the air bag 2 through the first air path 61 and discharge it to the cavity 101 of the main body 1 through the air exhaust path 402.

[0042] In addition, since the air inlet path 401 and the air exhaust 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 inlet path 401 and the air exhaust path 402 can be combined, 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 air bag 2 through the air path and extract the gas in the air bag 2 through the air path, thereby simplifying the structure of the blood pressure measuring device.

[0043] In the present application, the specific structure of the air supply and exhaust device 4 is not limited, and the air supply and exhaust device 4 can be an air pump, for example. The volume of the air pump can be set according to the air supply and exhaust requirements of the air bag 2 of the blood pressure measuring device and the size of the cavity 101 of the main body 1. In addition, considering that the volume of the main body 1 of the smart watch with blood pressure measurement function is small, the space of the cavity 101 is also small, and therefore, the volume of the air pump arranged in the smart watch is also small. In some possible embodiments of the present application, the air pump can be fixed on a structural member (not shown in the figure), and then the installation of the air pump on the main body 1 is realized through the fixation of the structural member and the main body 1. The material of the structural member can be metal or non-metal with high strength, but is not limited to the above, so that the structural member can reliably support the air pump, thereby improving the structural reliability of the air pump. In the present application, the fixation manner between the air pump and the structural member is not limited, and the air pump and the structural member can be fixed and connected through point gluing or threaded connection, for example. In addition, in some embodiments of the present application, the air pump can be point glued around to be glued and sealed, so as to improve the structural stability of the air pump.

[0044] With continuous reference to Figure 3 , the blood pressure measuring device can further include a driving device 7 electrically connected with the air supply and exhaust device 4, and the driving device 7 can be used to provide driving force for the air charging and discharging process of the air supply and exhaust device 4. In the present application, the driving device 7 is not specifically limited, and can be an electric motor, for example.

[0045] When the first air pressure sensor 5a is specifically arranged, the first air pressure sensor 5a can be a differential pressure air pressure sensor. In addition, the first air pressure sensor 5a has a first air hole 501 and a second air hole 502. The specific arrangement positions of the first air hole 501 and the second air hole 502 on the first air pressure sensor 5a are not limited, and the first air hole 501 and the second air hole 502 can be arranged on two opposite end faces of the first air pressure sensor 5a, for example. In addition, the first air pressure sensor 5a can further include a pressure diaphragm (not shown in the figure), which is arranged between the first air hole 501 and the second air hole 502. When the air pressures at the first air hole 501 and the second air hole 502 are different, the pressure diaphragm will deform, and the first air pressure sensor 5a can determine 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 diaphragm.

[0046] When Figure 3In the shown embodiment, the first air hole 501 of the first air pressure sensor 5a is connected with the air cavity of the air bag 2 through the second air path 62. In addition, a gas permeable hole 102a is formed on the side wall of the main body 1, which is connected with the outside atmosphere. The second air hole 502 of the first air pressure sensor 5a is connected with the gas permeable hole 102a through the third air path 63, so as to realize the connection between the second air hole 502 and the outside atmosphere. In the present application, the specific setting position of the gas permeable hole 102a is not limited, which can be adjusted according to the structure design of the main body 1 and the specific setting position of the first air pressure sensor 5a. In addition, the specific shape of the gas permeable hole 102a is not limited, which can be a regular shaped hole such as a circular hole, an oval hole or a square hole, or can be some possible irregular shaped hole.

[0047] Therefore, in the present application, the first air hole 501 side of the pressure diaphragm of the first air pressure sensor 5a is the air pressure in the air bag 2, and the second air hole 502 side of the pressure diaphragm 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 air bag 2 and the atmospheric pressure, and we usually consider 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.

[0048] In the embodiments of the present application, the specific setting form of each air path is not limited, which can be linearly arranged or curvedly arranged, and can be adaptively adjusted according to the components in the internal space of the blood pressure measuring device. It can be understood that, in order to make the drawing clear, in each schematic diagram of the present application, each air path is schematically shown as a straight line.

[0049] In addition, considering that the gas flow in each air path (for example, the first air path 61, the second air path 62 and the third air path 63) may have flow fluctuation problem, and the fluctuation of the gas flow may cause air pressure fluctuation, thereby affecting the blood pressure measurement result. In order to solve this problem, the air path of the blood pressure measuring device provided by the present application is designed as follows. Figure 4a , Figure 4a The internal structure schematic diagram of the air path of an embodiment of the present application is shown. In the shown embodiment, the air path of the blood pressure measuring device is designed as follows. Figure 4a In the shown embodiment, a plurality of protrusions 602 are arranged on the inner wall of the pipeline 601 of the air path, which are spaced and alternately arranged along the extension direction of the pipeline 601, so as to improve the air pressure fluctuation noise caused by the gas flow fluctuation, thereby achieving the purpose of improving the blood pressure measurement accuracy.

[0050] In the present application, the specific setting form of the protrusion 602 is not limited, and the cross-sectional shape thereof is exemplarily a circular arc shape, an oval shape or a square shape. Figure 4aa circle as shown in FIG. 1, a rectangle as shown in FIG. 2, a triangle as shown in FIG. 3, or other regular shapes. In some other embodiments of the present application, the protrusion 602 can also be some possible irregular shapes, which are not listed here but should be understood as falling within the protection scope of the present application. Figure 4b Figure 4c a triangle as shown in FIG. 3, or other regular shapes. In some other embodiments of the present application, the protrusion 602 can also be some possible irregular shapes, which are not listed here but should be understood as falling within the protection scope of the present application.

[0051] In the above embodiments 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 in communication with the external atmosphere. In some possible embodiments of the present application, the air inlet path 401 and the air exhaust path 402 of the air supply and exhaust device 4 can also be directly connected to the external atmosphere through the air hole on the side wall of the main body 1. For details, please refer to Figure 5 Figure 5 The structural schematic diagram 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 can also be provided with an air hole 102b and an air hole 102c, wherein the air inlet path 401 of the air supply and exhaust device 4 is in communication with the external atmosphere through the air hole 102b, and the air exhaust path 402 is in communication with the external atmosphere through the air hole 102c. In this way, the air supply and exhaust device 4 can fill the air in the external atmosphere into the air bag 2 through the air inlet path 401 and the first air path 61 during operation. In addition, when the gas in the air bag 2 needs to be exhausted, the air supply and exhaust device 4 can exhaust the gas in the air bag 2 through the first air path 61 and discharge it to the external atmosphere through the air exhaust 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 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 reliability of the blood pressure measuring device.

[0052] In order to ensure that the air supply and exhaust device 4 can operate normally, in addition to the above-mentioned arrangement mode that the air inlet path 401 and the air exhaust path 402 are directly connected to the external atmosphere through the air holes on the side wall of the main body 1, the negative pressure in the cavity 101 of the main body 1 can also be reduced to achieve the same purpose. In the present application, reducing the negative pressure in the cavity 101 of the main body 1 means reducing the air pressure difference between the cavity 101 and the external atmosphere outside the main body 1.

[0053] In order to reduce the negative pressure in the cavity 101 of the main body 1, the conventional blood pressure measuring device usually has an air hole 102d on the side wall of the main body 1, and the air hole 102d is not designed for waterproof. For details, please refer to Figure 2 ​​This allows the air inside the cavity 101 of the main body 1 to be replenished in a timely manner, thereby ensuring the accuracy of blood pressure measurement.

[0054] However, most of the functional modules and components of a blood pressure measuring device are housed within the cavity 101 of the main body 1. Without a waterproof design for the main body 1, these functional modules and components within the cavity 101 are at significant risk of damage, which would affect the lifespan of the blood pressure measuring device. This necessity is even more pronounced for portable electronic devices such as smartwatches or smart bracelets, which are frequently worn and used in various scenarios.

[0055] Based on this, it can be referred to Figure 6 In this embodiment, to reduce the negative pressure inside the cavity 101 of the main body 1, a vent hole 102d can be provided on the side wall of the main body 1. This vent hole 102d can connect the cavity 101 of the main body 1 to the outside atmosphere, allowing for timely replenishment of air to the cavity 101, thereby reducing the negative pressure inside the cavity 101 and ensuring the normal operation of the functional modules and devices within the main body 1. In this application, the specific location of the vent hole 102d is not limited; it can be adjusted according to the structural design of the main body 1. Furthermore, the vent hole 102a and the vent hole 102d can be located on the same side wall of the main body 1 or on different side walls.

[0056] In order to replenish air to the cavity 101 in a timely manner, in some possible embodiments of this application, the diameter of the vent hole 102d can be made relatively large, for example, greater than or equal to 1 mm. In addition, there can be multiple vent holes 102d, which can be arranged in an array, but are not limited to.

[0057] exist Figure 6 In the illustrated embodiment, to ensure good waterproof performance of the entire blood pressure measuring device, a first waterproof and breathable device 8 can be provided at the vent 102d. This first waterproof and breathable device 8 is both waterproof and allows air from the outside atmosphere to pass through and enter the cavity 101 of the main body 1. (Refer to...) Figure 7 , Figure 7A structural schematic diagram of the first waterproof and breathable device 8 provided by an embodiment of the present application is shown. The first waterproof and breathable device 8 can include a plurality of layer structures arranged in a stack, for example, including a foam 801, a balanced hole steel sheet 802, a polyethylene terephthalate (PET) layer, and a waterproof film 804. The balanced 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 respectively bonded and fixed with the balanced hole steel sheet 802. Since the balanced hole steel sheet 802 has a relatively large strength, it can support the entire waterproof and breathable device. In addition, the waterproof film 804 can be arranged on the side of the PET layer 803 away from the balanced hole steel sheet 802, and the waterproof film 804 can be bonded and fixed to the PET layer 803 by the double-sided adhesive 805, but is not limited thereto. When the waterproof and breathable device is arranged in the main body 1, the side of the waterproof film 804 of the first waterproof and breathable device 8 away from the PET layer 803 can be bonded and fixed to the side wall of the main body 1 by the waterproof adhesive 806, and the breathable hole 102d is covered.

[0058] In addition, in order to meet the requirement of the blood pressure measuring device on the air flow during the blood pressure measurement process, in some embodiments of the present application, the air permeation amount of the first waterproof and breathable device 8 can be set, for example, the air permeation amount of the first waterproof and breathable device 8 can be greater than or equal to 100 ml / min. In some other embodiments of the present application, the area of the first waterproof and breathable device 8 can also be adjusted, for example, the area of the first waterproof and breathable device 8 can be greater than 10 mm^2.

[0059] By using the blood pressure measuring device provided by the present application, the air permeation performance of the entire blood pressure measuring device can be met by arranging the breathable hole 102d. In addition, by arranging the first waterproof and breathable device 8 at the breathable hole 102d, the blood pressure measuring device has good waterproof and breathable performance, so that the blood pressure measuring device can be used in some scenes with high waterproof level requirements, thereby expanding the application scenarios of the blood pressure measuring device. Since 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 during the blood pressure measurement process by using the blood pressure measuring device provided by the present application, the blood pressure value measured by the blood pressure measuring device is more accurate.

[0060] From the introduction of the above embodiments, it can be known that the air vent 102a of the blood pressure measuring device provided in the embodiments of the present application is only used to communicate the second air hole 502 of the first air pressure sensor 5a with the outside atmosphere. In some scenes where the waterproof requirement for the first air pressure sensor 5a is not high, or the first air pressure sensor 5a itself has a waterproof structure, or the aperture of the air vent 102a is small, the air vent 102a can not be designed to be waterproof, thereby simplifying the structure of the blood pressure measuring device. However, in some blood pressure measuring devices with high waterproof requirements, a waterproof air permeation device can also be arranged at the air vent 102a. It can be continued to refer to Figure 3 In the embodiment, the second waterproof air permeation device 9 is arranged at the air vent 102a, which can be the same as the first waterproof air permeation device 8 arranged at the air vent 102d, or can be different, which is not limited in the present application.

[0061] It is worth mentioning that, in the embodiments shown in Figure 5 , since the air inlet path 401 and the air exhaust path 402 of the air supply and exhaust device 4 are directly communicated with the outside atmosphere through the air vents arranged on the side wall of the main body 1. Therefore, in the embodiments shown in Figure 5 , the side wall of the main body 1 can not be arranged with the air vent 102d for communicating the cavity 101 with the outside atmosphere, thereby making the waterproof performance of the blood pressure measuring device better. In addition, since the air vents 102b and 102c are used for air inlet and exhaust of the air supply and exhaust device 4, the size of the air vents 102b and 102c can be small, so that the waterproof air permeation device can not be arranged at the air vents 102b and 102c. However, in some blood pressure measuring devices with high waterproof requirements, a waterproof air permeation device can also be arranged at the air vents 102b and 102c, which can be arranged by referring to the first waterproof air permeation device 8 and the second waterproof air permeation device 9 described above, which will not be described here.

[0062] Since in the embodiments shown in Figure 6 , the air inside the cavity 101 of the main body 1 is mainly supplemented through the air vent 102d, and the first waterproof air permeation device 8 is arranged at the air vent 102d. If the first waterproof air permeation device 8 is blocked or has other problems, its air permeation performance will be greatly reduced, thereby affecting the accuracy of the blood pressure measurement of the entire blood pressure measuring device. In order to solve this problem, it can be continued to refer to Figure 6 , a second air pressure sensor 5b can also be arranged 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, and 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.

[0063] In this application, a first threshold can be set for P1. When the air pressure value P1 measured by the second air pressure sensor 5b is less than the set first threshold, the first waterproof and breathable device 8 is considered to have good breathability. In this embodiment, the value of the first threshold can be set according to the specific application scenario. For example, the first threshold can be set to 95 kPa. Thus, when the air pressure value P1 measured by the second air pressure sensor 5b is higher than 95 kPa, the first waterproof and breathable device 8 is considered to have good breathability.

[0064] In addition, when the air pressure value P1 measured by the second air pressure sensor 5b is lower than the first threshold, it is determined that the first waterproof and breathable device 8 is blocked. At this time, the user can replace or clean the first waterproof and breathable device 8 to ensure the safety of the blood pressure measuring device and the stability of blood pressure measurement.

[0065] It is understood that in this application, the first waterproof and breathable device 8 can be disposed on the outside of the main body 1 or on the inside of the main body 1. In addition, the first waterproof and breathable device 8 can be fixed to the main body 1 by threaded locking or snap-fit, so as to realize the detachable connection between the first waterproof and breathable device 8 and the main body 1, thereby facilitating the replacement and cleaning of the first waterproof and breathable device 8.

[0066] Reference Figure 8 , Figure 8 A schematic diagram of the frame structure of a blood pressure measuring device provided for another possible embodiment of this application. Figure 8 The blood pressure measuring device shown in the embodiment is the same as described above. Figure 6 The main difference in the illustrated embodiments is that: Figure 8 In the illustrated embodiment, the blood pressure measuring device further includes an air passage cavity 10, which is disposed within the cavity 101 of the main body 1. Furthermore, the air passage cavity 10 can be, but is not limited to, fixed to the side wall of the main body 1 facing the cavity 101 by means of adhesive bonding or threaded connection, to improve the structural stability of the air passage cavity 10.

[0067] Based on the aforementioned changes to the structure of the blood pressure measuring device, the connection method between the first pressure sensor 5a, the air supply and exhaust device 4, and the airbag 2 in this embodiment of the application has also been adaptively changed. For specific implementation, please refer to... Figure 8 The air supply and exhaust device 4 is connected to the air passage cavity 10 via the first air passage 61, and the first air port 501 of the first air pressure sensor 5a is connected to the air passage cavity 10 via the second air passage 62. Thus, the first air passage 61 and the second air passage 62 can be connected through the air passage cavity 10. Furthermore, the air passage cavity 10 can be connected to the air chamber of the airbag 2 via the fourth air passage 64. Figure 8Other structures of the blood pressure measuring device in the illustrated embodiment can be configured with reference to any of the above embodiments, and will not be described in detail here.

[0068] Using the blood pressure measuring device provided in this embodiment of the application, by adding an air passage cavity 10, the air intake passage 401 and the air release passage 402 of the air supply and exhaust device 4 can be connected to the air chamber of the airbag 2 through the air passage cavity 10. When the air supply and exhaust device 4 is working, it can draw gas from the cavity 101 of the main body 1 into the air passage cavity 10, and then into the air chamber of the airbag 2. In addition, the air supply and exhaust device 4 can also discharge the gas in the airbag 2 by discharging the gas in the air passage cavity 10 through the air release passage 402.

[0069] Furthermore, after the first pressure sensor 5a is connected to the air supply and exhaust device 4 through the air passage cavity 10, it can be connected to the airbag 2 through only one air passage (the fourth air passage 64). See also... Figure 9 , Figure 9 This application illustrates one possible embodiment of the same principle. Figure 8 A schematic diagram of the main body 1 of the corresponding blood pressure measuring device. (From...) Figure 9 It can be seen that only one connection hole 103 for connecting to the air bladder 2 can be opened on the side wall of the main body 1 of the blood pressure measuring device. Additionally, referring to... Figure 10 , Figure 10 This application illustrates one possible embodiment of the same principle. Figure 8 A schematic diagram of the structure of the airbag 2 in the corresponding blood pressure measuring device. In this embodiment, the airbag 2 may be provided with an air nozzle 201, which can be inserted into the aforementioned... Figure 9 The main body 1 shown has an opening, which enables the single-nozzle connection between the airbag 2 and the main body 1. This effectively reduces the number of connection holes 103 in the entire blood pressure measuring device, thereby improving the overall sealing of the blood pressure measuring device. It also reduces the risk of damage to functional modules and components inside the cavity 101 of the main body 1 of the blood pressure measuring device, thus helping to extend the service life of the blood pressure measuring device.

[0070] Furthermore, in this embodiment, the specific structure of the air nozzle 201 of the airbag 2 is not limited; for example, refer to Figure 11 , Figure 11The structure of the air nozzle 201 of the air bag 2 provided by one possible embodiment of the present application is shown. The air nozzle 201 can protrude from the air bag 2 in the direction towards the main body 1 from the side surface of the air bag 2, and a clamping structure 2011 can be provided on the air nozzle 201, which can be but is not limited to a ring-shaped protruding structure protruding from the surface of the air nozzle 201. In this way, when the air nozzle 201 is inserted into the connecting hole 103, the air nozzle 201 can be clamped to 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 in 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 air bag 2. At this time, the connection of the main body 1 and the air bag 2 can also be achieved through the insertion of the air nozzle and the connecting hole 103.

[0071] It can be understood that when the air bag 2 and the main body 1 are connected through a single air nozzle, the air path cavity 10 can be connected to the air nozzle 201 of the air bag 2 through the fourth air path 64, so as to realize the communication between the air path cavity 10 and the air cavity of the air bag 2.

[0072] It is worth mentioning that, Figure 8 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air permeable hole 102b and the first waterproof air permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play a role in detecting the air permeability of the first waterproof air permeable device. For example, protrusions can be arranged in the pipelines of the first air path 61, the second air path 62 and the third air path 63, and the air pressure sensor 5a can be arranged in the pipeline of the first air path 61. Figure 8 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air permeable hole 102b and the first waterproof air permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play a role in detecting the air permeability of the first waterproof air permeable device. For example, protrusions can be arranged in the pipelines of the first air path 61, the second air path 62 and the third air path 63, and the air pressure sensor 5a can be arranged in the pipeline of the first air path 61. Figure 8 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air permeable hole 102b and the first waterproof air permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play a role in detecting the air permeability of the first waterproof air permeable device. For example, protrusions can be arranged in the pipelines of the first air path 61, the second air path 62 and the third air path 63, and the air pressure sensor 5a can be arranged in the pipeline of the first air path 61. Figure 13 The specific setting modes of the other structures of the blood pressure measuring device shown will not be described one by one here.

[0073] In some embodiments of the present application, in order to ensure the safety of the blood pressure measuring device, an air valve 11 can also be arranged in the blood pressure measuring device, which can communicate with the air supply and exhaust device 4 and can serve as a backup air outlet of the air supply and exhaust device 4. In specific implementation, the air valve 11 can be arranged in the pipeline of the fourth air path 64. Figure 12 , Figure 12 The frame structure of the blood pressure measuring device of another possible embodiment of the present application is shown. By comparing the blood pressure measuring device shown in Figure 12 with the blood pressure measuring device shown in Figure 8 , it can be found that the difference between the two embodiments mainly lies in that: Figure 12The blood pressure measuring device in the illustrated embodiment is further 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 is in communication with the air path cavity 10 through the fifth air path 65, and the second air port 1102 is in communication with the cavity 101 of the main body 1 through the sixth air path 66.

[0074] In addition, as can be known from the above introduction that the air inlet path 401 and the air exhaust path 402 of the air supply and exhaust device 4 are directly connected with the outside atmosphere through the air holes in the side wall of the main body 1, in some embodiments of the present application, the second air port 1102 of the air valve 11 can also be directly connected with the outside atmosphere through the air holes in the side wall of the main body 1 through the sixth air path 66, 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.

[0075] In this embodiment of the present application, since the air exhaust path 402 of the air supply and exhaust device 4 is in communication with the air path cavity 10, the air valve 11 can be in communication with the air exhaust path 402 of the air supply and exhaust device 4. In this way, in the case that the air exhaust path 402 of the air supply and exhaust device 4 fails or is not open, etc., the air valve 11 can be opened to realize the air exhaust of the air path cavity 10, thereby avoiding damage to the air supply and exhaust device 4, the first air pressure sensor 5a or the air bag 2, etc., so as to ensure the safety of the blood pressure measuring device during the blood pressure measurement process.

[0076] In the present application, the specific setting form of the air valve 11 is not limited, and for example, the air valve 11 can be an electromagnetic 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 and improving the user experience. For example, in one possible embodiment of the present application, the air valve 11 can be configured such that when the air pressure in the air path cavity 10 is greater than a certain value (such as 300 mmHg), the air valve 11 is electrically controlled to be opened for air exhaust; and when the air pressure in the air path cavity 10 is reduced to a certain value (such as 10 mmHg) or below, the air valve 11 is closed. In this way, the air valve 11 can be adaptively opened or closed according to the air pressure value in the air path cavity 10, so as to maintain the air pressure in the entire air path system in a relatively stable state, thereby improving the reliability of the blood pressure measuring device.

[0077] As can be known from the above introduction of the air valve 11 in the embodiments, the air valve 11 can effectively improve the safety performance of the blood pressure measuring device. Based on this, in some possible embodiments of the present application, an air valve 11 can also be provided on the air path (such as the first air path 61, the third air path 63 or the fourth air path 64, etc.) of the blood pressure measuring device, so as to control the opening and closing of the corresponding air path through the air valve 11, thereby realizing flexible control of the flow state of the gas in the air path, and further improving the reliability of the blood pressure measuring device.

[0078] It is worth mentioning that, Figure 12 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air-permeable hole 102d and the first waterproof air-permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play the role of detecting the air permeability of the first waterproof air-permeable device. For another example, the pipes of the first air path 61, the second air path 62, the third air path 63 and the fourth air path 64 can be provided with protrusions, and the protrusions can be arranged on the side wall of the main body 1 of the blood pressure measuring device shown. Figure 12 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air-permeable hole 102d and the first waterproof air-permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play the role of detecting the air permeability of the first waterproof air-permeable device. For another example, the pipes of the first air path 61, the second air path 62, the third air path 63 and the fourth air path 64 can be provided with protrusions, and the protrusions can be arranged on the side wall of the main body 1 of the blood pressure measuring device shown. Figure 12 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air-permeable hole 102d and the first waterproof air-permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play the role of detecting the air permeability of the first waterproof air-permeable device. For another example, the pipes of the first air path 61, the second air path 62, the third air path 63 and the fourth air path 64 can be provided with protrusions, and the protrusions can be arranged on the side wall of the main body 1 of the blood pressure measuring device shown. Figure 12 The other structures of the blood pressure measuring device shown can be set according to any of the above embodiments, for example, when the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air-permeable hole 102d and the first waterproof air-permeable device 8, the second air pressure sensor 5b can also be arranged in the cavity 101 of the blood pressure measuring device shown to play the role of detecting the air permeability of the first waterproof air-permeable device. For another example, the pipes of the first air path 61, the second air path 62, the third air path 63 and the fourth air path 64 can be provided with protrusions, and the protrusions can be arranged on the side wall of the main body 1 of the blood pressure measuring device shown.

[0079] In addition, in order to improve the accuracy of the blood pressure measuring device in measuring the blood pressure value, a calibration device can be added to the first air pressure sensor 5a in the present application to calibrate the air pressure value measured by the first air pressure sensor 5a in the air cavity of the air bag 2. In specific implementation, the calibration device can be arranged in the air path cavity 10. Figure 13 , Figure 13 The frame structure of the blood pressure measuring device provided for another possible embodiment of the present application is shown in the figure. In this embodiment, the blood pressure measuring device is provided with a third air pressure sensor 5c, which can also be a differential pressure air pressure sensor in this embodiment. The third air pressure sensor 5c includes a third air hole 503 and a fourth air hole 504, and the third air hole 503 can be connected to the air path cavity 10 through a seventh air path 67 to realize the communication between the third air hole 503 and the air cavity of the air bag 2. In addition, an air-permeable hole 102e is formed 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 atmosphere through an eighth air path 68. In the present application, the specific setting position of the air-permeable hole 102e is not limited, which can be adjusted according to the structure design of the main body 1 and the specific setting position of the third air pressure sensor 5c. In addition, it can be understood that the third waterproof air-permeable device 12 can be arranged at the air-permeable hole 102e, which can be set according to the introduction of the first waterproof air-permeable device 8 at the air-permeable hole 102d in any of the above embodiments, which will not be described here.

[0080] As can be understood from the above description of the specific configuration of the third pressure sensor 5c, both the third pressure sensor 5c and the first pressure sensor 5a measure the pressure difference between the air passage cavity 10 and the external atmosphere. Based on this, the accuracy of the measurement by the first pressure sensor 5a can be determined by comparing the pressure difference measured by the first pressure sensor 5a with that measured by the third pressure sensor 5c. The determination process can be, for example, as follows: when the difference between the pressure difference measured by the first pressure sensor 5a and that measured by the third pressure sensor 5c is within a first threshold range, the pressure difference measured by the first pressure sensor 5a is determined to be accurate, and the blood pressure measuring device calculates the corresponding blood pressure value based on this pressure difference. In this application, the first threshold range can be set according to the specific application scenario; for example, it can be -200 Pa to 200 Pa.

[0081] Furthermore, if the difference between the pressure difference measured by the first pressure sensor 5a and the pressure difference measured by the third pressure sensor 5c is outside the first threshold range, it is determined that the pressure difference measured by the first pressure sensor 5a is inaccurate. In this case, the pressure difference data measured by the first pressure sensor is discarded, and the next measurement is performed until the difference between the pressure difference measured by the first pressure sensor 5a and the pressure difference measured by the third pressure sensor 5c falls into the first threshold range, and the blood pressure measuring device calculates the corresponding blood pressure value based on the pressure difference.

[0082] It is worth mentioning that, Figure 13 Other structures of the blood pressure measuring device shown in the embodiment can be configured with reference to any of the above embodiments, for example, in Figure 13 When the main body 1 of the blood pressure measuring device shown is provided with a vent 102d and a first waterproof and ventilated device 8 on its side wall, it can also be used in... Figure 13 A second air pressure sensor 5b is installed inside the cavity 101 of the blood pressure measuring device shown, to detect the air permeability of the first waterproof and breathable device 8. Alternatively, protrusions can be provided in the pipes of the first air passage 61, second air passage 62, third air passage 63, fourth air passage 64, fifth air passage 65, sixth air passage 66, seventh air passage 67, and eighth air passage 68. Alternatively, when the blood pressure measuring device does not have an air passage cavity 10, the third air port 503 of the third air pressure sensor 5c can be directly connected to the air cavity of the airbag 2 through the seventh air passage 67. Figure 13 The specific configuration of other structures of the blood pressure measuring device shown will not be elaborated here.

[0083] The blood pressure measuring device of this embodiment of the application can effectively improve the accuracy of blood pressure measurement by adding a third pressure sensor 5c to calibrate the pressure difference measured by the first pressure sensor 5a.

[0084] In this application, the third pressure sensor 5c can, in addition to employing, such as Figure 13 In addition to the differential pressure type pressure sensor shown, an absolute pressure type pressure sensor can also be used. For specific implementation, please refer to... Figure 14 , Figure 14 A schematic diagram of the frame structure of a blood pressure measuring device according to another possible embodiment of this application is shown. In this embodiment, the third air pressure sensor 5c has only one third air port, which is connected to the air passage cavity 10 through the seventh air passage 67.

[0085] exist Figure 14 In the illustrated embodiment, the air pressure inside the airbag 2 measured by the absolute pressure type third pressure sensor 5c can be used to calibrate the air pressure inside the air chamber of the airbag 2 measured by the first pressure sensor 5a. The calibration method can be, for example, that when the difference between the air pressure inside the air chamber of the airbag 2 measured by the first pressure sensor 5a and the air pressure inside the air chamber of the airbag 2 measured by the third pressure sensor 5c is within a first threshold range, the air pressure inside the air chamber of the airbag 2 measured by the first pressure sensor 5a is determined to be accurate, and the blood pressure measuring device calculates the corresponding blood pressure value based on this air pressure. In this application, the first threshold range can be set according to the specific application scenario; for example, it can be -200 Pa to 200 Pa.

[0086] Furthermore, if the difference between the air pressure in the air chamber of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air chamber 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 chamber of the airbag 2 measured by the first air pressure sensor is inaccurate. In this case, the 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 chamber of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air chamber of the airbag 2 measured by the third air pressure sensor 5c falls into the first threshold range, and the blood pressure measuring device calculates the corresponding blood pressure value based on the air pressure.

[0087] As can be seen from the above description of the working principle of the first air pressure sensor 5a, the air pressure difference measured by the first air pressure sensor 5a is directly determined by the external atmospheric pressure and the air pressure inside the air chamber of the airbag 2. We usually consider the external atmospheric pressure to be a constant value. Therefore, the air pressure value inside the air chamber of the airbag 2 can be directly obtained by measuring the pressure difference and the external atmospheric pressure through the first air pressure sensor 5a.

[0088] It is worth mentioning that, Figure 14 Other structures of the blood pressure measuring device shown in the embodiment can be configured with reference to any of the above embodiments, for example, in Figure 14When the side wall of the main body 1 of the blood pressure measuring device shown is provided with the air-permeable hole 102d and the first waterproof air-permeable device 8, the second air-permeable hole 102e can also be provided on the side wall of the main body 1. Figure 14 The second air pressure sensor 5b is arranged in the cavity 101 of the blood pressure measuring device shown to play a role of detecting the air permeability of the first waterproof air-permeable device 8. For example, a protrusion can be arranged in the pipeline 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 example, when the air path cavity 10 is not arranged in the blood pressure measuring device, the third air hole of the third air pressure sensor 5c can be directly communicated with the air cavity of the air bag 2 through the seventh air path 67, and the air pressure in the air cavity of the air bag 2 can be directly measured by the third air pressure sensor 5c. Figure 14 The specific arrangement of other structures of the blood pressure measuring device shown will not be described here.

[0089] The blood pressure measuring device of the embodiment of the present application can effectively improve the accuracy of the blood pressure measuring device in measuring the blood pressure value by arranging the third air pressure sensor 5c to calibrate the measurement result of the first air pressure sensor 5a.

[0090] Referring to Figure 15 , Figure 15 The structural schematic diagram of the blood pressure measuring device provided by another embodiment of the present application is shown. The structure of the blood pressure measuring device of the embodiment is different from that of any of the above-mentioned 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-permeable hole 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 communicated with 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 air bag 2.

[0091] 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 pressure difference measured by the first air pressure sensor 5a, the second air pressure sensor 5b can also be arranged in the cavity 101 of the main body 1. Figure 15 The second air pressure sensor 5b is an absolute pressure sensor, and is arranged 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 arranged opposite to the second air hole 502 of the first air pressure sensor 5a. In a possible embodiment, the fifth air hole 505 and the second air hole 502 can be coaxially arranged, and the distance between the fifth air hole 505 and the second air hole 502 is less than or equal to 1 mm.

[0092] Since the second air pressure sensor 5b includes only one fifth air port 505, it can measure the air pressure inside the cavity 101 of the main body 1. Furthermore, since the distance between the fifth air port 505 and the second air port 502 is small, the air pressure measured on the side of the fifth air port 505 can be considered equal to the air pressure measured on the side of the second air port 502.

[0093] In adopting this application Figure 15 When the blood pressure measuring device shown performs blood pressure measurement, air is pumped into the air chamber of the airbag 2 through the air supply and exhaust device 4. This creates a low-pressure space within the air chamber 101 of the main body 1, lower than atmospheric pressure. Assuming the air pressure within the air chamber 101 of the main body 1 is P1 (the absolute pressure sensor reading), the external atmospheric pressure is P0, and the air pressure within the air chamber of the airbag 2 is P, it can be understood that this pressure P is the differential pressure value within the air chamber of the airbag 2, and its absolute pressure value is P + P0. The relationship between these pressure values ​​is as follows: the reading of the first pressure sensor 5a: P2 = P + P0 - P1; therefore, the actual air pressure within the airbag 2 is: P = P2 - ΔP (ΔP = P0 - P1), then P = P2 - (P0 - P1).

[0094] It is understood that, in this embodiment of the application, although the air pressure inside the main body 1 is low, by setting a second air pressure sensor 5b inside the cavity 101 of the main body 1, the difference between the external atmospheric pressure P0 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 inside the air chamber of the airbag 2, and the true air pressure value inside the airbag 2 can be obtained. This effectively improves the accuracy of blood pressure measurement in the blood pressure measuring device.

[0095] In addition, in this embodiment of the application, a first waterproof and breathable device 8 can be provided at the vent 102d of the blood pressure measuring device. In this way, while achieving waterproofing of the whole device, the accuracy of the blood pressure value measured by the blood pressure measuring device can also be guaranteed.

[0096] Furthermore, since the second pressure sensor 5b is located within the cavity 101 of the main body 1, and the second pressure sensor 5b is an absolute pressure sensor, it can be understood from the above description of detecting the degree of blockage of the first waterproof and breathable device 8 by setting the second pressure sensor 5b that, in this application... Figure 15In the illustrated embodiment, the degree of blockage of the first waterproof air permeable device 8 can also be determined according to the magnitude of the measured air pressure value P1 of the second air pressure sensor 5b during the blood pressure measurement. In a specific implementation, a first threshold value can be set for P1. When the measured air pressure value P1 of the second air pressure sensor 5b is higher than the first threshold value, it is determined that the air permeability of the first waterproof air permeable device 8 is good. And / or, when the measured air pressure value P1 of the second air pressure sensor 5b is less than the first threshold value, it is determined that the air permeability of the first waterproof air permeable device 8 is poor. At this time, the user can replace or clean the first waterproof air permeable device 8 to ensure the safety of the blood pressure measurement device and the stability of the blood pressure measurement, so that the blood pressure value measured by the blood pressure measurement device is more accurate.

[0097] In the present application, the first waterproof air permeable 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 fixing mode of the first waterproof air permeable device 8 and the main body 1 can be threaded locking or clamping, etc., so as to realize the detachable connection of the first waterproof air permeable device 8 and the main body 1, thereby facilitating the replacement and cleaning of the first waterproof air permeable device 8, etc.

[0098] It is worth mentioning that, Figure 15 The other structures of the blood pressure measurement device of the illustrated embodiment can be arranged according to any of the above embodiments, for example, an air path cavity 10 can be arranged in the blood pressure measurement device, so that the air supply and exhaust device 4 is communicated with the air path cavity 10 through the first air path 61, the first air hole 501 of the first air pressure sensor 5a is communicated with the air path cavity 10 through the second air path 62, and the air path cavity 10 is communicated with the air bag 2 through the fourth air path 64, to realize the connection between the main body 1 and the air bag 2 through a single air nozzle. For Figure 15 The specific arrangement mode of the other structures of the blood pressure measurement device is not described here.

[0099] 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, the first waterproof air permeable device 8 can be arranged on the main body 1 of the blood pressure measurement device to realize the waterproof design of the blood pressure measurement device. In addition, the air permeability of the first waterproof air permeable device 8 can be detected through the arrangement of the second air pressure sensor 5b, so as to avoid the influence of the blockage of the first waterproof air permeable device 8 on the measurement result of the blood pressure measurement device.

[0100] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A body assembly characterized by, The main body, the air supply and exhaust device and the first air pressure sensor are included, wherein: The main body includes a cavity 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 for connecting the air bag; The air supply and exhaust device includes an air inlet path and an air outlet path, and is used for communicating with the air cavity of the air bag through the first air path; The first air pressure sensor includes a first air hole and a second air hole; the main body is provided with a first air permeable hole; the first air hole is used for communicating with the air cavity of the air bag through the second air path; and the second air hole communicates with the first air permeable hole through the third air path, so that the first air pressure sensor communicates with the external atmosphere through the first air permeable hole.

2. The body assembly of claim 1, wherein, The main body is also provided with a second air permeable hole, and the second air permeable hole is provided with a first waterproof air permeable device.

3. The body assembly of claim 2, wherein, The air permeation amount of the first waterproof air permeable device is greater than or equal to 100 ml / min.

4. A body assembly according to any one of claims 1 to 3, wherein The main body assembly further includes an air path cavity arranged in the cavity of the main body; The air supply and exhaust device communicates with the air path cavity, and the first air hole of the first air pressure sensor communicates with the air path cavity; the air path cavity communicates with the air cavity of the air bag.

5. A body assembly according to any one of claims 1 to 4, wherein The first air permeable hole is also provided with a second waterproof air permeable device.

6. A body assembly according to any one of claims 1 to 5, wherein The inner wall of the pipeline of the second air path is provided with a plurality of protrusions, and the plurality of protrusions are arranged alternately and spaced along the extension direction of the pipeline.

7. A body assembly according to any one of claims 1 to 6, wherein The first pressure sensor further includes a pressure diaphragm between the first air hole and the second air hole.

8. A body assembly according to any one of claims 1 to 7, wherein The air inlet path and the air outlet path both communicate with the cavity.

9. A body assembly according to any one of claims 1 to 8, wherein, The side wall is provided with the first air permeable hole.

10. A body assembly according to any one of claims 1 to 9, wherein, The third air path includes a pipeline, one end of the pipeline communicates with the second air hole, and the other end of the pipeline communicates with the first air permeable hole.

11. A body assembly according to any one of claims 1 to 10, wherein, The main body assembly further includes a second air pressure sensor arranged in the cavity of the main body, and the main body assembly determines the air permeability of the first waterproof air permeable device according to the air pressure value measured by the second air pressure sensor.

12. The body assembly of claim 11, wherein, 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 air permeable 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 first waterproof air permeable device is blocked.

13. The body assembly of claim 4, wherein, The main body assembly further includes a gas valve including a first gas port and a second gas port, the first gas port communicates with the air path cavity through a fifth air path, and the second gas port communicates with the cavity of the main body through a sixth air path.

14. A body assembly as claimed in claim 4 or 13, wherein, The main body assembly further includes a third air pressure sensor including a third air hole and a fourth air hole; the main body is also provided with a third air permeable hole; the third air hole communicates with the air path cavity through a seventh air path, and the fourth air hole communicates with the third air permeable hole through an eighth air path.

15. The body assembly of claim 14, wherein, 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. 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.

16. The body assembly of claim 4 or 13, wherein, The main body assembly further comprises a third air pressure sensor, which is an absolute pressure sensor; the third air pressure sensor comprises a third air hole, which is connected to the air path cavity through a seventh air path.

17. The body assembly of claim 16, wherein, When the difference between the air pressure in the air bag measured by the first air pressure sensor and the air pressure in the air bag measured by the third air pressure sensor is within a first threshold range, it is determined that the air pressure in the air bag measured by the first air pressure sensor is accurate. When the difference between the air pressure in the air bag measured by the first air pressure sensor and the air pressure in the air bag measured by the third air pressure sensor is outside the first threshold range, it is determined that the air pressure in the air bag measured by the first air pressure sensor is inaccurate.

18. The body assembly of any one of claims 1-17, wherein, The main body further comprises a fourth air hole and a fifth air hole, the air inlet path of the air supply and exhaust device is connected to the outside atmosphere through the fourth air hole, and the air exhaust path is connected to the outside atmosphere through the fifth air hole.

19. A blood pressure measurement device, characterized by The main body assembly and the air bag according to any one of claims 1-18.

20. The blood pressure measurement device of claim 19, wherein, The main body is detachably connected to the air bag.

21. The blood pressure measurement device of claim 20, wherein, The end of the main body is provided with a connecting hole, the air bag has an air nozzle, the air nozzle protrudes from the air bag towards the main body, the air nozzle is inserted into the connecting hole, and the fourth air path is connected to the air nozzle.

22. A blood pressure measurement device as claimed in any one of claims 19 to 21, wherein, The blood pressure measuring device further comprises a photoplethysmography (PPG) module and an ECG detection module, the PPG module and the ECG detection module are arranged on the bottom surface of the main body.

23. A main body assembly characterized by, The main body, 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 comprises an end portion for connecting the air bag. The air supply and exhaust device comprises an air inlet path and an air exhaust path, and is used for connecting the air cavity of the air bag through a first air path. The first air pressure sensor comprises a first air hole, a second air hole, and a pressure diaphragm, the pressure diaphragm is located between the first air hole and the second air hole, the main body is provided with a first air hole, the first air hole is used for connecting the air cavity of the air bag through a second air path, and the second air hole is connected to the cavity. The second air pressure sensor is an absolute pressure sensor, and comprises a fifth air hole, which is arranged opposite to the second air hole. ​ 24. The body assembly of claim 23, wherein, The main body assembly obtains the air pressure value in the air cavity of the air bag 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.

25. A body assembly as claimed in claim 23 or 24, wherein, The fifth air hole is coaxially arranged with the second air hole.

26. The body assembly of claim 25, wherein, The spacing between the fifth air hole and the second air hole is less than or equal to 1mm.

27. A body assembly as claimed in any one of claims 23 to 26, wherein, The main body is also provided with a gas permeable hole, and the gas permeable hole is provided with a waterproof and gas permeable device; when the air pressure value measured by the second air pressure sensor is higher than a first threshold value, it is determined that the waterproof and gas permeable device has good gas permeability; 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 and gas permeable device is blocked.

28. A blood pressure measurement device, characterized by The main body assembly and the air bag according to any one of claims 23-27 are included.

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