Blood pressure measuring air bag, blood pressure measuring device and wearable equipment

Abstract

The invention relates to the field of blood pressure measurement, and discloses a blood pressure measurement air bag, a blood pressure measurement device and wearable equipment. The air bag comprises an air bag wall making contact with a user, and the air bag wall is composed of a first part, a second part and a third part which are sequentially arranged in the width direction of the air bag wall; wherein the first part and the third part correspond to the edge positions of the air bag wall in the width direction, the second part corresponds to the middle position of the air bag wall, and when the air bag wall makes contact with a user, the user is mainly pressed through the second part; as the deformation resistance of the first part and / or the third part is larger than that of the second part, that is, when the second part is bent, the first part and / or the third part are / is not prone to deformation, only the second part exists in the effective compression area, and pulse wave signals at the edge position can be prevented from being transmitted into the air bag air chamber; the consistency of the pulse wave signals in the air chamber of the air bag is good, the quality of the pulse wave signals obtained by the pressure sensor can be improved, and the accuracy of blood pressure measurement is improved.

Description

Technical Field

[0001] The present application relates to the technical field of blood pressure measurement, and in particular to a blood pressure measurement airbag, a blood pressure measurement device and a wearable device. Background Art

[0002] Hypertension is the main risk factor for cardiovascular and cerebrovascular diseases. Blood pressure measurement is the main means to understand blood pressure levels, diagnose and guide hypertension treatment, and evaluate antihypertensive efficacy. Among them, the accuracy of blood pressure measurement is the basis for hypertension treatment and management.

[0003] In recent years, in order to further improve measurement comfort, convenience and user experience, wearable blood pressure measurement technology has begun to appear, and there are wearable blood pressure devices that have passed medical certification standards, such as wrist-worn blood pressure devices.

[0004] At present, the airbag width of wrist-worn blood pressure devices is narrower than that of traditional blood pressure monitors, and may even be less than 37% of the wrist circumference. The reduction in airbag width leads to a smaller pressure area on the wrist, which poses a challenge to the blood pressure measurement accuracy of wrist-worn blood pressure devices.

[0005] Therefore, it is necessary to improve the structure of the airbag to improve the blood pressure measurement accuracy of the wearable blood pressure device. Summary of the invention

[0006] The embodiments of the present application provide a blood pressure measuring airbag, a blood pressure measuring device and a wearable device for improving the accuracy of blood pressure measurement.

[0007] In a first aspect, the present application provides a blood pressure measuring airbag, which includes an airbag wall for contacting a user, and the airbag wall is composed of a first part, a second part and a third part arranged in sequence along its width direction; wherein the anti-deformation ability of the first part is greater than the anti-deformation ability of the second part, and / or the anti-deformation ability of the third part is greater than the anti-deformation ability of the second part.

[0008] According to the embodiment of the present application, the first part and the third part correspond to the edge part of the airbag wall along the width direction, and the second part corresponds to the middle part of the airbag wall. Since the uniformity of the pulse wave signal corresponding to the central part is better, and the uniformity of the pulse wave signal corresponding to the edge part is poor, for this reason, the embodiment of the present application sets the central part to have a smaller anti-deformation ability, so that the uniform pulse wave signal can be smoothly transmitted to the airbag chamber; and the edge part is set to have a higher anti-deformation ability, which can block or attenuate the transmission of the uneven pulse wave signal to the airbag chamber, thereby improving the uniformity of the pulse wave signal in the airbag chamber, and ultimately improving the accuracy of blood pressure measurement.

[0009] In a possible implementation, the airbag wall includes a main body layer and a first material layer, and the first material layer is stacked on the inner surface or outer surface of the main body layer corresponding to the first part, so that the deformation resistance of the first part is greater than that of the second part.

[0010] It can be understood that for the edges of the airbag wall that are not sufficiently compressed, namely the first part and the third part, stacking the first material layer and the second material layer on the outer surface or inner surface of the corresponding main layer can attenuate the signals with poor consistency in the first part and the third part, thereby reducing their impact on the overall signal.

[0011] In a possible implementation, the elastic modulus of the material of the first material layer is greater than the elastic modulus of the material of the main body layer.

[0012] It can be understood that by laminating a first material layer with greater deformation resistance on the outer surface or inner surface of the main body layer corresponding to the first part, the deformation resistance of the first part can be greater than that of the second part.

[0013] In a possible implementation, the material of the main body layer includes polyurethane, polyvinyl chloride or silicone, and the material of the first material layer includes nylon, polyurethane, polyvinyl chloride or silicone.

[0014] It is understandable that in order to facilitate blood pressure measurement, the main body layer is generally made of a flexible material, so the first material layer can be made of a material with greater deformation resistance than any of the above-mentioned flexible materials, such as nylon.

[0015] In a possible implementation, the first material layer includes a plurality of hollow portions spaced apart along a length direction of the airbag.

[0016] Considering that when the first material layer is stacked, the airbag will need more pressure to deform and bend when inflated, so a larger amount of gas and a higher air pressure are required. Therefore, in order to reduce the required pressure, the shape of the first material layer is designed to be hollow, and the hollow part is used for bending and deformation, which can effectively reduce the air pressure and air volume required for inflation.

[0017] In one possible implementation, the size of each hollow portion along the length direction gradually decreases from the first side edge of the first part to the second side edge of the first part, wherein the first side edge and the second side edge are two side edges of the first part arranged opposite to each other along the width direction, and the second side edge is closer to the center of the airbag wall than the first side edge.

[0018] Through the above design, the air pressure and air volume required for inflation can be further reduced.

[0019] In a possible implementation, the shape of each hollow portion includes any one of the following: rectangle, diamond, triangle, circle, ellipse.

[0020] In a possible implementation, the main body layer and the first material layer are an integrated structure.

[0021] It can be understood that through one-piece molding, during the film forming stage of the airbag wall, using a specific mold, the edge of the airbag wall can be quickly thickened, which can not only effectively attenuate the edge pulse wave signal with poor consistency, but the one-piece molding process can also effectively improve the mass production and yield of the airbag.

[0022] In a possible implementation, the thickness of the first material layer gradually decreases from the first side edge of the first portion to the second side edge of the first portion.

[0023] It is understandable that since the part where the airbag actually contacts the user, such as the wrist itself, has a certain curvature, the structure in which the thickness of the airbag wall gradually decreases from the edge to the center can make the airbag wall fit more closely to the user's wrist and other parts, making the airbag fit better with the user, thereby improving the accuracy of blood pressure detection.

[0024] In a possible implementation, along the length direction of the airbag wall, the first material layer extends from one end to the other end of the airbag wall.

[0025] It can be understood that the first material layer extends from one end of the airbag wall to the other end, that is, covers the entire edge of the airbag, which can more comprehensively prevent signals with poor consistency at the edge from entering the airbag chamber.

[0026] In a possible implementation, the width of the airbag wall is 15 cm to 35 cm, the width of the first portion is 0.1 to 0.4 times the width of the airbag wall, and / or the width of the third portion is 0.1 to 0.4 times the width of the airbag wall.

[0027] It is understandable that the ratio between the width of the first portion and / or the width of the third portion and the width of the balloon wall needs to be determined according to the actual width of the balloon wall. Relatively speaking, within the above range, better blood pressure measurement accuracy can be achieved.

[0028] In a second aspect, the present application provides a blood pressure measurement device, comprising a pressure sensor and the airbag of the first aspect of the embodiment of the present application, wherein the pressure sensor is used to measure the pressure in the air chamber of the airbag.

[0029] In a third aspect, the present application provides a wearable device, comprising a main body and an airbag according to the first aspect of the embodiment of the present application, wherein the airbag is arranged on a surface of the main body facing the user when the main body is worn.

[0030] In a possible implementation, the wearable device is a wristband device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1Ais a schematic diagram of a wristband device according to some embodiments of the present application;

[0032] Figure 1B is a schematic diagram of a pressurized rear airbag according to some embodiments of the present application;

[0033] Figure 2 is a schematic diagram of a structure of a multi-airbag according to some embodiments;

[0034] Figure 3 is a schematic diagram of the structure of an airbag plus a sensor according to some embodiments;

[0035] Figure 4 is a schematic diagram of a pulse wave signal transmission path according to some embodiments of the present application;

[0036] Figure 5 is a schematic diagram of a first airbag according to some embodiments of the present application;

[0037] Figure 6 is a side view of a first airbag according to some embodiments of the present application;

[0038] Figure 7 is a schematic structural diagram of a first material layer according to some embodiments of the present application;

[0039] Figure 8 is a schematic diagram of a second material layer according to some embodiments of the present application;

[0040] Fig. 9 is a schematic structural diagram of a second first material layer according to some embodiments of the present application;

[0041] Fig. 10A is a schematic diagram of a first hollow portion according to some embodiments of the present application;

[0042] Fig. 10B is a schematic diagram of a second hollow portion according to some embodiments of the present application

[0043] Fig.11 is a schematic diagram of a third hollow portion according to some embodiments of the present application;

[0044] Fig.12 is a schematic diagram of a fourth hollow portion according to some embodiments of the present application;

[0045] Fig.13 is a schematic diagram of a fifth hollow portion according to some embodiments of the present application;

[0046] Fig.14is a schematic diagram showing a first thickness reduction method according to some embodiments of the present application;

[0047] Fig.15 is a schematic diagram showing a second thickness reduction method according to some embodiments of the present application;

[0048] Fig.16A is a schematic diagram showing a third thickness reduction method according to some embodiments of the present application;

[0049] Fig. 16B is a schematic diagram of a second airbag according to some embodiments of the present application;

[0050] Fig.17 is a side view of a third airbag according to some embodiments of the present application;

[0051] Fig.18 is a side view of a fourth airbag according to some embodiments of the present application;

[0052] Fig.19 is a schematic diagram of a fifth airbag according to some embodiments of the present application;

[0053] Fig. 20 is a schematic diagram of a reinforcement structure according to some embodiments of the present application. DETAILED DESCRIPTION

[0054] The specific embodiments of the present application will be described below using terms commonly used by those skilled in the art.

[0055] To facilitate understanding of the present invention, some basic concepts and technical terms involved in the present invention are first introduced.

[0056] Human blood pressure: refers to the lateral pressure perpendicular to the blood vessel wall generated by the pulsating blood flow in the blood vessels. The peak value of the pressure is the systolic pressure, also known as high pressure, and the valley value of the pressure is the diastolic pressure, also known as low pressure. The pressure signal generated by the pulsation of blood flow can be called a "pulse wave signal". Blood pressure is an important indicator of health monitoring and can reflect the health status of the human body. Therefore, how to measure blood pressure conveniently and accurately has become a hot issue.

[0057] Oscillometric method: a method of measuring blood pressure. During the specific measurement, an airbag needs to be tied to a person's limbs, and the airbag is pressurized (or pressurized first and then depressurized) to gradually block (or release) the blood flow in the human artery, so that the pulse wave signal of the human body is transmitted to the airbag chamber, causing pressure fluctuations in the airbag chamber. Then, by analyzing the air pressure fluctuations in the airbag chamber, the user's blood pressure (for example, systolic pressure and diastolic pressure) can be obtained. Usually, when wearable devices are used to measure blood pressure, this blood pressure measurement method is generally used to measure the user's blood pressure.

[0058] The implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0059] An embodiment of the present application provides a wearable device including a blood pressure measuring airbag (hereinafter referred to as the "airbag"), wherein the airbag includes an airbag wall that is contacted by a user, and the edge portion of the airbag wall is configured to have a strong anti-deformation performance, thereby blocking or attenuating the transmission of an uneven pulse wave signal corresponding to the edge portion of the airbag wall to the airbag chamber, thereby improving the accuracy of blood pressure measurement.

[0060] In the embodiments of the present application, the wearable device can be any one of a wristband device (e.g., a smart watch, a smart bracelet, etc.), a cuff device (e.g., a cuff device worn on an upper arm or wrist), a head-mounted device, and a finger-worn device, depending on the different wearing or wearing parts. For ease of description, the following description takes the case where the wearable device is a wristband device as an example.

[0061] Figure 1A is a schematic diagram of a wristband device 100 according to some embodiments of the present application.

[0062] like Figure 1A As shown, the wristband device 100 may include a main body 101 and a blood pressure measuring device disposed on the main body. The main body 101 includes a watch body 1011 and a wristband 1012, and the watch body 1011 is used to implement the main functions of the wristband device 100, such as display, audio playback, communication, etc. The wristband 1012 is used to wear the watch body 1011 on the user's wrist. For example, the wristband 1012 can be made of a flexible material such as knitted fabric, leather, plastic, etc., so that it can extend around the user's wrist to wear the watch body 1011 on the user's wrist. The connection method between the watch body 1011 and the wristband 1012 can be various methods such as snap connection, bonding, clamping connection, etc., which can be a detachable connection or a fixed connection, which is not limited in this application.

[0063] The blood pressure measuring device includes an airbag 102, an air pump and a pressure sensor (not shown). The airbag 102 is arranged on the surface of the wristband device 100 facing the user's wrist when it is worn. In some possible embodiments, the airbag 102 is detachably mounted on the main body 101. In this way, the airbag 102 can be flexibly installed and removed according to actual user needs. For example, one end of the airbag 102 can be connected to the watch body 1011, and the other end can be connected to the wristband 1012. In addition, the ratio of the length of the part where the airbag 102 fits the wristband 1012 to the total length of the airbag 102 can exceed a certain threshold (for example, 90%), so that the airbag 102 can change its shape accordingly with the bending of the wristband, so as to better fit the user's wrist.

[0064] It should be noted that in this application, the length direction of the airbag 102 is the direction in which the wearable device surrounds the user's wrist when worn (it can also be understood as the direction of the wrist circumference, and the X direction is shown in each figure herein); the width direction of the airbag 102 is the extension direction of the user's arm when the wearable device is worn (it can also be understood as the length direction of the arm, and the Y direction is shown in each figure herein). The thickness direction of the airbag 102 is the direction perpendicular to its length direction and width direction (the Z direction is shown in each figure herein).

[0065] In addition, in the present application, the length, width, and thickness of a component refer to the dimensions of the component along the X direction, along the Y direction, and along the Z direction, respectively.

[0066] Furthermore, the air pump is connected to the air path of the air chamber of the airbag 102, and the air pump is used to inflate or deflate the air chamber. Furthermore, the pressure sensor is connected to the air path of the air chamber of the airbag 102, and the pressure sensor is used to detect the pressure signal in the air chamber during the process of inflation or deflation by the air pump. Furthermore, the wristband device 100 can calculate the user's blood pressure based on the pressure signal and the principle of oscillometric method (for example, the user's blood pressure is calculated by the blood pressure detection chip built into the watch body 1011). Exemplarily, the air pump and the pressure sensor can be integrated in the watch body 1011, which can improve the comfort of users wearing the wristband device for a long time.

[0067] At present, the devices for measuring blood pressure based on the oscillometric method include wristband devices, home wrist sphygmomanometers, upper arm sphygmomanometers, etc. In the oscillometric blood pressure measurement devices, the airbag is the key component of the oscillometric measurement technology. In the oscillometric method, the airbag needs to be inflated and pressurized to achieve compression of the blood vessels, obtain the pulse wave signal under different pressurization levels, and then calculate the blood pressure value based on the correspondence between the pulse wave signal and the pressurization curve. The design of the airbag structure directly affects both the pressurization curve and the pulse wave signal. Therefore, the airbag structure is a key hardware structure that affects the accuracy of oscillometric blood pressure measurement.

[0068] Among them, both home wrist blood pressure monitors and wristband devices can measure blood pressure on the wrist, which is comfortable for users and provides a good experience. They are currently widely used. However, the size and width of the airbags of wrist blood pressure monitors and wristband devices are smaller than those of upper arm blood pressure monitors. In order to adapt to wearable scenarios, the width of the airbags on wristband devices may even be less than 37% of the wrist circumference, which brings greater challenges to the airbag structure design.

[0069] This is because, when the user's blood vessels are continuously compressed, the pulse wave signal fed back from the skin surface is transmitted to the air chamber inside the airbag through different areas of the airbag surface. The oscillometric method requires that the compression effect of different areas of the airbag on the blood vessels be as uniform as possible to improve the accuracy of blood pressure measurement. However, as the width of the airbag narrows, the uneven degree of compression of the blood vessels by different areas of the airbag will increase, thereby affecting the accuracy of blood pressure measurement.

[0070] For example, Figure 1B FIG. 1 shows a cross-sectional view of the airbag 102 after being pressurized (the cross-sectional direction is perpendicular to the X direction). Figure 1B , along the Y direction, the expansion degree of each part of the airbag 102 is different, and the expansion degree of the middle area is greater than that of the two side areas. In other words, the airbag 102 is thick in the middle and thin on both sides. In this way, along the Y direction, the compression effects of each part of the airbag 102 on the blood vessels are inconsistent or asymmetric. Specifically, compared with the middle area of ​​the airbag 102, the compression effect of the edge area of ​​the airbag 102 on the blood vessels is poorer. In this way, the pulse wave signal received in the middle area of ​​the airbag 102 has better uniformity, while the pulse wave signal received in the edge area has poorer uniformity. And as the width of the airbag 102 becomes narrower, the uneven degree of compression of the blood vessels by each area of ​​the airbag 102 will become more and more obvious, so that the uneven degree of the pulse wave signal received by each part of the airbag 102 will also increase accordingly, which ultimately affects the accuracy of blood pressure measurement.

[0071] In order to improve the accuracy of blood pressure measurement, in one embodiment, Figure 2 As shown, a multi-airbag solution is adopted, in which the airbag structure is composed of at least two independent airbags stacked together. The ultra-narrow airbag close to the skin is the sensing airbag 301, which is used to receive the pulse wave signal on the skin surface, and the wider airbag covering it is used as the pressurizing airbag 302 for full compression. By separating the pressurizing and sensing airbags, this solution can only transmit high-quality signals in a uniform area to the pressure sensor. However, the airbag structure of this solution is more complicated, which will increase the processing flow and process difficulty, and the appearance of the airbag is not simple enough.

[0072] In another embodiment, if Figure 3As shown, the airbag 401 is used as a pressurizing device, which is only used to pressurize and compress the blood vessels, and the pulse wave signal is read by the pressure sensor 402. The pressure sensor 402 can be in the form of a single point or an array. The size of the pressure sensor 402 can be small enough to just cover the area where the blood vessels (such as the radial or ulnar artery of the forearm) are evenly compressed. This ensures that the pressure sensor 402 reads a pulse wave signal with good consistency. However, this solution is very dependent on whether the pressure sensor 402 can accurately press the blood vessel position, and the position of the blood vessel varies from person to person, and it is difficult for the pressure sensor 402 to accurately find the position of each user's blood vessel. In addition, the structure of the airbag 401 plus the pressure sensor 402 is relatively complex, which also increases the difficulty of the processing flow and process, and is difficult to mass produce. At the same time, the appearance is not simple enough.

[0073] To this end, the present application provides an airbag and a wearable device including the airbag. The arrangement of the airbag on the wearable device can refer to the above description (for example, the above description of Figure 1A ), which will not be described here. The airbag includes an airbag wall for contacting the user. Along the width direction, the edge portion of the airbag wall has a greater deformation resistance than the center portion. As mentioned above, the uniformity of the pulse wave signal corresponding to the center portion is better. To this end, the center portion is set to have a smaller deformation resistance, so that the uniform pulse wave signal can be smoothly transmitted to the airbag chamber. The uniformity of the pulse wave signal corresponding to the edge portion is poor. To this end, the edge portion is set to have a higher deformation resistance, which can block or attenuate the transmission of the uneven pulse wave signal to the airbag chamber, thereby improving the uniformity and consistency of the pulse wave signal in the airbag chamber, and ultimately improving the accuracy of blood pressure measurement.

[0074] Figure 4 FIG. 2 shows the pulse wave signal transmission path provided by the embodiment of the present application. Figure 4 As shown, the pulse wave signal in the airbag chamber includes the pulse wave signal of the compressed center and the pulse wave signal of the compressed edge, wherein the pulse wave signal of the compressed center originates from the central part of the airbag wall, and the pulse wave signal of the compressed edge originates from the edge part of the airbag wall; since the central part of the airbag wall is set to have a smaller anti-deformation ability, the pulse wave signal originated from the central part can be effectively transmitted into the air chamber, and then can be detected by the pressure sensor; and since the edge part of the airbag wall is set to have a higher anti-deformation ability, the pulse wave signal originated from the edge part is attenuated and blocked from being transmitted into the air chamber, thereby ensuring that the pulse wave signal that finally enters the air chamber is of better signal quality and consistency.

[0075] It can be understood that the present application only needs to enhance the anti-deformation ability of the edge part of the airbag wall to achieve the improvement of the pulse wave signal quality. The overall processing difficulty is low, and the original airbag main structure and appearance can be maintained unchanged.

[0076] In the present application, the method of enhancing the deformation resistance of the edge portion of the airbag wall may be one or more of the following: superimposing a reinforcing layer on the edge portion, using a material with a higher elastic modulus as the material of the edge portion, increasing the thickness of the edge portion, and providing a reinforcing structure (e.g., reinforcing ribs) on the edge portion, etc., which is not limited in the present application. The following is further described in conjunction with specific embodiments.

[0077] The first embodiment of the airbag of the present application is described below. In this embodiment, a reinforcement layer is added to the edge of the airbag wall to improve the anti-deformation performance of the edge of the airbag wall.

[0078] Figure 5 is a schematic diagram of an airbag 500 according to some embodiments of the present application. Figure 6 is a side view of the airbag 500 .

[0079] refer to Figure 5 The airbag 500 includes a plurality of airbag walls, for example, airbag walls 500a, 500b, 500c, ... The plurality of airbag walls together enclose an air chamber of the airbag. In the present embodiment, a partition wall 500d is further provided in the air chamber, and the partition wall 500d can separate the air chamber into a sub-air chamber 504 and a sub-air chamber 505. The sub-air chamber 504 and the sub-air chamber 505 are interconnected, and the pulse wave signal is first transmitted to the sub-air chamber 504, and the pulse wave signal is uniformized to a certain extent in the sub-air chamber 504 before being transmitted to the sub-air chamber 505. The air pressure sensor is connected to the sub-air chamber 505, so that a more uniform air pressure signal can be measured. In other words, by providing two sub-air chambers, the distribution of the pulse wave signal in the air chamber can be made more uniform, which is beneficial to improving the accuracy of blood pressure measurement.

[0080] It can be understood that in other embodiments, the airbag may have only one air chamber (i.e., no partition wall is provided inside the airbag), or may have multiple sub-air chambers (for example, two partition walls are provided inside the airbag, and the two partition walls can divide the air chamber of the airbag into three sub-air chambers).

[0081] The airbag wall 500a is the airbag wall 500a of the airbag 500 for contacting the user, that is, when the wristband device is worn, the airbag 500 fits the user's wrist through the airbag wall 500a. The airbag wall 500a is composed of a first part A, a second part B and a third part C arranged in sequence along the Y direction. It can be understood that the first part A and the third part C are the edge parts of the airbag wall 500a, and the second part B is the central part of the airbag wall 500a.

[0082] refer to Figure 6 The airbag wall 500a includes a main body layer 501, a first material layer 502 and a second material layer 503. The first material layer 502 is stacked on the outer surface of the main body layer 501 corresponding to the first part A (that is, the surface of the main body layer 501 facing away from the air chamber), so that the deformation resistance of the first part A is greater than that of the second part B; the second material 503 is stacked on the outer surface of the main body layer 501 corresponding to the third part C, so that the deformation resistance of the third part C is greater than that of the second part B.

[0083] It should be noted that, in other embodiments, the first material layer 502 can also be stacked on the inner surface of the main layer 501 corresponding to the first part A (that is, the surface of the main layer 501 facing the air chamber), which can also make the first part A's anti-deformation ability greater than the second part B's anti-deformation ability; similarly, the second material 503 can be stacked on the inner surface of the main layer 501 corresponding to the third part C, which can also make the third part C's anti-deformation ability greater than the second part B's anti-deformation ability.

[0084] In this embodiment, for the signal source with better signal quality and good consistency on the airbag wall 500a, that is, the second part B, only the main body layer 501 is provided, so it has a smaller thickness and stiffness (corresponding to a smaller anti-deformation ability), so that the pulse wave signal can pass effectively. For the edge parts of the airbag wall 500a that are not sufficiently compressed, that is, the first part A and the third part C, the first material layer 502 and the second material layer 503 are stacked on the corresponding main body layer 501, respectively, which can improve the anti-deformation performance of the first part A and the third part C, thereby attenuating the signals with poor consistency of the first part A and the third part C, and reducing their influence on the overall signal.

[0085] Generally, in order to facilitate blood pressure measurement, the main body layer 501 is made of a flexible material, and the material of the main body layer 501 includes but is not limited to polyurethane, polyvinyl chloride or silicone.

[0086] In some possible embodiments, the first material layer 502 and the second material layer 503 may be made of the same material as the main body layer 501 , that is, by thickening the edge of the airbag wall 500 a , attenuation of signals with poor consistency is achieved.

[0087] Alternatively, in some other possible embodiments, the material of the first material layer 502 is different from the material of the main body layer 501, for example, the elastic modulus of the material of the first material layer 502 is greater than the elastic modulus of the material of the main body layer 501, and the elastic modulus of the material of the second material layer 503 is greater than the elastic modulus of the material of the main body layer 501. For example, the first material layer 502 and the second material layer 503 are made of a material with a larger elastic modulus than any of the above-mentioned flexible materials, such as nylon material. In addition, since nylon material has a better skin feel, using nylon material as the first material layer 502 and the second material layer 503 is also conducive to improving the user's wearing experience.

[0088] In the above embodiment, the first material layer 502 and / or the second material layer 503 are added to the outer surface or inner surface of the main layer 501 of the airbag wall 500a, without increasing the complexity of the structure and process, and having little impact on mass production and appearance.

[0089] In this embodiment, the airbag wall 500a may include a first material layer 502 and a second material layer 503. In other embodiments, the airbag 500a may include one of the first material layer 502 and the second material layer 503.

[0090] For example, in some possible embodiments, Figure 7 As shown, the airbag wall 500a may only include a main body layer 501 and a first material layer 502, and the first material layer 502 is stacked on the outer surface of the main body layer 501 corresponding to the first portion A, so that the deformation resistance of the first portion A is greater than the deformation resistance of the second portion B. In this way, the signal with poor consistency at the first portion A can be attenuated, and the quality of the pulse wave signal can also be improved.

[0091] Similarly, if Figure 8 As shown, the airbag wall 500a may only include a main body layer 501 and a second material layer 503, and the second material layer 503 is stacked on the outer surface of the main body layer 501 corresponding to the third portion C, so that the deformation resistance of the third portion C is greater than the deformation resistance of the second portion B. In this way, the signal with poor consistency at the third portion C can be attenuated, and the quality of the pulse wave signal can also be improved.

[0092] In the actual processing process, the thicker and more rigid film material can be cut into long strips first, and then the film material can be welded or bonded to the corresponding position of the main layer 501 by high-temperature welding or glue bonding (hot melt glue, UV glue, etc. can be selected) to form the first material layer 502 and / or the second material layer 503. The first material layer 502 and the second material layer 503 are solidified at the part close to the edge of the airbag wall 500a, which just corresponds to the area that is not fully compressed when the blood vessel is compressed, so as to achieve the attenuation of the signal with poor consistency in the first part and the third part. Among them, when the material of the first material layer 502 or the second material layer 503 is the same as that of the main layer 501, the high-temperature welding method can be used; when the material of the first material layer 502 or the second material layer 503 is different from that of the main layer 501, the bonding method can be used.

[0093] Alternatively, in the actual processing process, the width of the partition wall 500d (the dimension along the Y direction) can be processed to be larger than the width of the airbag wall 500a, so that both sides of the partition wall 500d along the Y direction are longer than the airbag wall 500a. Then, the slightly longer parts on both sides of the partition wall 500d are respectively turned over to the outer surface of the airbag wall 500a, so that a material layer 502 and a second material layer 503 can be directly formed on the two side edges of the airbag wall 500a.

[0094] After adding the first material layer and the second material layer, the airbag will need more pressure to deform and bend when inflated, thus requiring a larger amount of air and a higher air pressure. To this end, in some embodiments, the first material layer 502 and / or the second material layer 503 may be designed to be hollowed out, and the hollowed-out area may be used for bending and deformation, thereby effectively reducing the air pressure required for inflation.

[0095] The following description will be made by taking the provision of a hollow area on the first material layer as an example, and the second material layer may refer to the same implementation manner.

[0096] refer to Fig. 9 In some possible embodiments, the first material layer 502 includes a plurality of hollow portions 502a spaced apart along the length direction of the airbag. The length of each hollow portion 502a and the spacing between adjacent hollow portions 502a can be designed according to the actual size of the airbag, and the present application does not limit this.

[0097] Furthermore, the shape of each hollow portion 502a includes any one of the following: rectangle, diamond, triangle, circle, ellipse.

[0098] Take the shape of the hollow portion 502a as an example, which is a rectangle. Fig. 9 As shown, Fig. 9This is a schematic diagram of a first material layer according to some embodiments of the present application, and each rectangle may be spaced apart by a distance equal to the width of the rectangle.

[0099] like Fig. 10A and Fig. 10B As shown, Fig. 10A and Fig. 10B FIG. 5 shows a case where both the first material layer 502 and the second material layer 503 include a rectangular hollow portion 502a. Fig. 10A In the example shown, along the Y direction, each hollow portion 502a does not penetrate the first material layer 502. It can be understood that in this example, the first material layer 502 is a continuous structure and can be attached to the surface of the main body layer 501 as a whole film, thereby simplifying the formation process of the airbag 500. Fig. 10B In the example shown, each hollow portion 502a penetrates the first material layer along the Y direction. That is, in this example, the first material layer 502 is divided into a plurality of discrete sub-membrane sheets 502b by the hollow portions 502a, and the first material layer 502 can be understood as being composed of a plurality of sub-membrane sheets 502b. In this example, each hollow portion 502a penetrates the first material layer along the Y direction, and the area corresponding to the hollow portion 502a is more likely to bend and deform, which can further reduce the air pressure required when the airbag 500 is inflated.

[0100] like Fig.11 As shown, Fig.11 The case where both the first material layer 502 and the second material layer 503 include a circular hollow portion 502a is shown.

[0101] In some possible embodiments, Fig.12 As shown, the first part A includes a first side A1 and a second side A2. The first side A1 and the second side A2 are two side edges of the first part A that are oppositely arranged along the width direction, and the second side A2 is closer to the center of the airbag wall 500a than the first side A1.

[0102] The length of each hollow portion 502a of the first material layer 502 may gradually decrease from the first side A1 of the first portion A to the second side A2 of the first portion A. For ease of understanding, Fig.12 The hollow portion 502a is a regular triangle, and its length direction gradually decreases from the first side A1 of the first part A to the second side A2 of the first part A. In practical applications, the hollow portion 502a may not be a regular shape.

[0103] like Fig.13 As shown, Fig.13Another possible hollow shape of the hollow portion 502a is shown. The hollow shape may be a semicircle. Similarly, the size of each hollow portion 502a along the length direction gradually decreases from the first side A1 of the first part A to the second side A2 of the first part A.

[0104] Understandably, Fig.12 and Fig.13 In the embodiment, each hollow portion 503a of the second material layer 503 can maintain the same shape and features as each hollow portion 502a of the first material layer 502 to ensure the overall aesthetics. Each hollow portion 503a of the second material layer 503 can refer to the embodiment of each hollow portion 502a of the first material layer 502, which will not be repeated here.

[0105] In the above embodiment, by designing the shape of the first material layer 502 and / or the second material layer 503 to be hollow, and using the hollow area to bend and deform, the required height can be reduced. Figure 5 The air volume and air pressure required to achieve the same compression effect are shown.

[0106] In the actual processing, the desired hollow part shape is first made on a thicker and more rigid film material, and then the film material is welded or bonded to the corresponding position of the main layer 501 by high-temperature welding or point glue bonding (hot melt glue, UV glue, etc. can be selected) to form the first material layer 502 and / or the second material layer 503. The first material layer 502 and the second material layer 503 are solidified at the part close to the edge of the airbag wall 500a, which just corresponds to the area that is not fully compressed when the blood vessel is compressed, so that the signal with poor consistency at the first part and the third part is attenuated without increasing the pressure required for the bending of the airbag.

[0107] In some possible embodiments, Fig.14 As shown, the thickness of the first material layer 502 gradually decreases from the first side A1 of the first portion A to the second side A2 of the first portion A.

[0108] Specifically, Fig.14 FIG. 5 shows a method in which the thickness of the first material layer 502 decreases linearly from the first side A1 of the first portion A to the second side A2 of the first portion A. In other embodiments, such as Fig.15 As shown, the thickness of the first material layer 502 decreases in a curved manner from the first side A1 of the first portion A to the second side A2 of the first portion A; or Fig.16A As shown, the thickness of the first material layer 502 decreases in a step-like manner from the first side A1 of the first portion A to the second side A2 of the first portion A.

[0109] Understandably, Fig.14 , Fig.15 and Fig.16AIn the embodiment, the thickness of the second material layer 503 can refer to the first material layer 502, and gradually decrease in the opposite direction thereof, and specifically, whether it is reduced linearly, curvedly, or steppedly, can be the same as the first material layer 502 to ensure the overall aesthetics. The thickness of the second material layer 503 can also refer to the embodiment of the thickness of the first material layer 502, and will not be repeated here.

[0110] The advantage of doing this is that it can not only effectively attenuate the edge pulse wave signal with poor consistency, but also because the part where the airbag 500 actually contacts the user, such as the wrist itself, has a certain curvature, the structure in which the thickness of the airbag wall 500a gradually decreases from the edge to the center can make the airbag wall 500a fit the user's wrist and other parts more closely, so that the airbag 500 fits the user well and the accuracy of blood pressure detection can be improved.

[0111] like Figures 5 to 13 As shown, along the length direction of the airbag wall 500a, the first material layer 502 can extend from one end of the airbag wall 500a to the other end; that is, the first material layer 502 can cover the edge of the entire compression area, so as to more comprehensively prevent signals with poor consistency at the edge position from entering the airbag air chamber.

[0112] In actual applications, the width of the airbag wall 500a of the airbag used on the wristband device 100 is 15cm to 35cm, then the width of the first part A can be 0.1 times to 0.4 times the width of the airbag wall 500a, and / or the width of the third part C is 0.1 times to 0.4 times the width of the airbag wall 500a. Here, the specific values ​​are summarized based on actual application experience. Within the above range, better blood pressure measurement accuracy can be achieved. It should be noted that the ratio between the width of the first part A and / or the width of the third part C and the width of the airbag wall 500a needs to be determined based on the actual width of the airbag wall 500a, and the above data is only an example.

[0113] In addition, in this embodiment, the first material layer 502 and the second material layer 503 may not be solid structures, but may be in the form of airbags. Fig. 16B As shown, the first material layer 502 and the second material layer 503 are respectively formed with cavities therein, so that the first material layer 502 and the second material layer 503 form airbags 502b and airbags 503b, respectively. It can be understood that since the airbags 502b and airbags 503b have strong anti-deformation ability, after the airbags 502b and airbags 503b are stacked on the corresponding main body layer 501 of the first part A and the third part C, the anti-deformation ability of the first part A and the third part C can be improved, so as to block or attenuate the transmission of the uneven pulse wave signal to the air chamber of the airbag 500.

[0114] The second embodiment of the airbag of the present application is introduced below. In this embodiment, the reinforcing layer and the main body layer are integrally formed to improve the anti-deformation performance of the edge portion of the airbag wall while reducing the process difficulty.

[0115] In the first embodiment described above (for example, Figures 5 to 16B In the corresponding embodiment), during the processing of the airbag 500, it is necessary to first complete the preparation of the main layer 501 of the airbag wall 500a, and then stack the first material layer 502 and the second material layer 503 on the outer surface of the main layer 501 corresponding to the first part A and the third part C respectively by welding or bonding.

[0116] In this embodiment, in order to further simplify the processing steps and reduce the process difficulty, refer to Fig.17 The main body layer 501, the first material layer 502 and the second material layer 503 can be integrally formed, that is, the main body layer 501, the first material layer 502 and the second material layer 503 are an integrated structure.

[0117] In some possible embodiments, by means of integrated molding, a specific mold is used during the film forming stage of the airbag wall 500a to form the airbag wall 500a. Figure 14 to Figure 16A The structure shown is thick at the edges and thin in the middle. Figure 14 to Figure 16A In the example shown, the first material layer 502 is disposed on the outer surface of the main body layer 501 . In other examples, the first material layer 502 may also be disposed on the inner surface of the main body layer 501 .

[0118] In this way, the edge of the airbag wall 500a can be quickly thickened by one-piece molding, which can not only effectively attenuate the edge pulse wave signal with poor consistency, but also the one-piece molding process can effectively improve the mass production and yield of the airbag.

[0119] Other configurations of the airbag wall (eg, shape and size of the airbag wall) are substantially the same as the configurations of the airbag wall 500a in the first embodiment described above, so reference may be made to the description of the airbag wall 500a described above and no further elaboration is given.

[0120] The third embodiment of the airbag of the present application is introduced below. In this embodiment, a material with a high elastic modulus is used at the edge of the airbag wall to improve the anti-deformation performance of the edge of the airbag wall.

[0121] like Fig.18 As shown, Fig.18 1 is a side view of an airbag 600 according to some embodiments of the present application. The airbag 600 includes an airbag wall 600a for contacting a user, and the airbag wall 600a is composed of a first portion A', a second portion B' and a third portion C' sequentially arranged along its width direction.

[0122] The first portion A′ is formed by material layer 601 , the second portion B′ is formed by material layer 602 , and the third portion C′ is formed by material layer 603 . Fig.18 Different line colors represent different materials.

[0123] The deformation resistance of the material layer 601 is greater than that of the material layer 602, so that the deformation resistance of the first portion A' is greater than that of the second portion B'. The deformation resistance of the material layer 603 is greater than that of the material layer 602, so that the deformation resistance of the third portion C' is greater than that of the second portion B'.

[0124] In some possible embodiments, the material layer 602 corresponding to the second part B' can be made of any one of polyurethane, polyvinyl chloride or silicone; the material layer 601 corresponding to the first part A' and the material layer 603 corresponding to the third part C' can be made of nylon.

[0125] It should be noted that, in other possible embodiments, the material layer 601 corresponding to the first part A' can be kept the same as the material layer 602 corresponding to the second part B', and only the material layer 603 corresponding to the third part C' uses a material with a greater elastic modulus than the material layer 602 corresponding to the second part B'; or, the material layer 603 corresponding to the third part C' can be kept the same as the material layer 602 corresponding to the second part B', and only the material layer 601 corresponding to the first part A' uses a material with a greater elastic modulus than the material layer 602 corresponding to the second part B'.

[0126] In some embodiments, Fig.18 As shown, the first part A', the second part B' and the third part C' have substantially the same thickness. In other embodiments, the thickness of each part may also be different, for example, the thickness of the first part A' is greater than the thickness of the second part B', and / or the thickness of the third part C' is greater than the thickness of the second part B'. In some possible embodiments, the thickness of the material layer 601 corresponding to the first part A', and / or the thickness of the material layer 603 corresponding to the third part C', can refer to the embodiment of the first material layer 502 and the second material layer 503 in the first embodiment, so that the airbag wall 600a can form a structure in which the thickness gradually decreases from the edge to the center. In this way, not only can the edge pulse wave signal with poor consistency be effectively attenuated, but also the airbag 600 can be well fitted with the user, thereby improving the accuracy of blood pressure detection.

[0127] The fourth embodiment of the airbag of the present application is described below. In this embodiment, a reinforcing structure (eg, reinforcing ribs) is provided at the edge of the airbag wall to improve the anti-deformation performance of the edge of the airbag wall.

[0128] like Fig.19 As shown, Fig.19 is a schematic diagram of an airbag 700 according to some embodiments of the present application. The airbag 700 includes an airbag wall 700a for contacting a user, and the airbag wall 700a is composed of a first part A", a second part B" and a third part C" sequentially arranged along its width direction;

[0129] The airbag wall 700a includes a main body layer 701, and the inner surface of the main body layer 701 corresponding to the first part A" is provided with a reinforcement structure so that the first part A" has a greater anti-deformation ability than the second part B". The inner surface of the main body layer 701 corresponding to the third part C" is also provided with a reinforcement structure (not shown in the figure) so that the third part C" has a greater anti-deformation ability than the second part B".

[0130] In this way, for the signal source with better signal quality and good consistency on the airbag wall 700a, that is, the second part B", the rigidity of the original main layer 701 is maintained to facilitate the effective passage of the signal. For the edges of the airbag wall 700a that are not sufficiently compressed, that is, the first part A" and the third part C", a reinforcement structure is set on the inner surface of the corresponding main layer 701, which can attenuate the signals with poor consistency in the first part A" and the third part C".

[0131] The following only takes the reinforcement structure of the inner surface of the main body layer 701 corresponding to the first part A" as an example, and the reinforcement structure of the inner surface of the main body layer 701 corresponding to the third part C" can refer to the same implementation.

[0132] like Fig.19 As shown, in some possible embodiments, the reinforcement structure includes a plurality of reinforcing ribs 702 spaced apart along the length direction, and the shape of each reinforcing rib 702 includes any one of the following: rectangle, diamond, triangle, circle, ellipse.

[0133] Or, in some other possible embodiments, such as Fig. 20 As shown, the reinforcement structure of the inner surface of the main body layer 701 corresponding to the first part A" includes a reinforcement rod 703 extending from one end of the airbag wall 700a to the other end. The shape of the cross section of the reinforcement rod 703 includes any of the following: rectangle, diamond, triangle, circle, ellipse.

[0134] In this way, while ensuring the rigidity of the main layer 701 corresponding to the first part A" and the main layer 701 corresponding to the third part C", a reinforcement structure is set on the inner surface, which can not only avoid deformation of the edge of the airbag wall 700a, but also prevent the airbag wall 700a from thickening.

[0135] In summary, the airbag provided in the embodiment of the present application isolates the edge signals with poor consistency at the edge of the airbag wall by enhancing the deformation resistance of the first part and / or the third part of the airbag wall, optimizes the consistency of the pulse wave signal entering the air chamber, and has a simple processing technology, which does not affect the overall appearance and mass producibility of the airbag.

[0136] It should be noted that in the examples and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0137] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims

1. A blood pressure measuring airbag, characterized in that: The airbag includes an airbag wall for contacting a user, wherein the airbag wall is composed of a first portion, a second portion and a third portion sequentially arranged along a width direction thereof; The first portion has a greater anti-deformation capability than the second portion, and / or the third portion has a greater anti-deformation capability than the second portion.

2. The airbag according to claim 1, characterized in that: The airbag wall includes a main body layer and a first material layer, wherein the first material layer is stacked on an inner surface or an outer surface of the main body layer corresponding to the first portion, so that the first portion has a greater anti-deformation capability than the second portion.

3. The airbag according to claim 2, characterized in that: The elastic modulus of the material of the first material layer is greater than the elastic modulus of the material of the main body layer.

4. The airbag according to claim 2, characterized in that: The material of the main body layer includes polyurethane, polyvinyl chloride or silicone, and the material of the first material layer includes nylon, polyurethane, polyvinyl chloride or silicone.

5. The airbag according to claim 2, characterized in that: The first material layer includes a plurality of hollow portions spaced apart along the length direction of the airbag.

6. The airbag according to claim 5, characterized in that: The size of each hollow portion along the length direction gradually decreases from the first side edge of the first part to the second side edge of the first part, wherein the first side edge and the second side edge are two side edges of the first part arranged opposite to each other along the width direction, and the second side edge is closer to the center of the airbag wall than the first side edge.

7. The airbag according to claim 5, characterized in that: The shape of each hollow portion includes any of the following: rectangle, diamond, triangle, circle, ellipse.

8. The airbag according to claim 2, characterized in that: The main body layer and the first material layer are an integrated structure.

9. The airbag according to any one of claims 2 to 8, characterized in that: The thickness of the first material layer gradually decreases from the first side edge of the first portion to the second side edge of the first portion.

10. The airbag according to any one of claims 2 to 9, characterized in that: Along the length direction of the airbag wall, the first material layer extends from one end to the other end of the airbag wall.

11. The airbag according to any one of claims 1 to 10, characterized in that: The width of the airbag wall is 15 cm to 35 cm, the width of the first portion is 0.1 to 0.4 times the width of the airbag wall, and / or the width of the third portion is 0.1 to 0.4 times the width of the airbag wall.

12. A blood pressure measuring device, characterized in that: The invention comprises an airbag according to any one of claims 1 to 11 and a pressure sensor, wherein the pressure sensor is used to measure the pressure in the air chamber of the airbag.

13. A wearable device, characterized in that: The invention comprises a main body and the airbag according to any one of claims 1 to 11, wherein the airbag is arranged on a surface of the main body facing the user in a worn state.

14. The wearable device according to claim 13, characterized in that: The wearable device is a wristband device.

Images