Air valve, air path system, wearable device, and blood pressure measurement device

Abstract

The application relates to the technical field of air valves, and provides an air valve, an air path system, a wearable device and a blood pressure measuring device, which can solve the problem of low working reliability of the air path system of the blood pressure measuring device in the related art. The air valve comprises a valve body and a diaphragm arranged in the valve body, the valve body has a first cavity located at a first side of the diaphragm and a second cavity located at a second side of the diaphragm; the valve body is provided with a first contact part and a second contact part, the first contact part is located at the first side and is arranged adjacent to the first cavity, the first contact part surrounds a gas leakage cavity, one side of the gas leakage cavity close to the diaphragm is provided with a cavity opening, and the second contact part is located at the second side; a first gas hole of the valve body is in communication with the first cavity, a second gas hole is in communication with the second cavity, and a gas leakage hole is in communication with the gas leakage cavity; the diaphragm comprises a first diaphragm area and a second diaphragm area, the first diaphragm area is provided with a first air passage, and the second diaphragm area is provided with a second air passage. The application can be used on wearable devices such as smart watches.

Description

Technical Field

[0001] This application relates to the field of air valve technology, and in particular to an air valve, an air circuit system, a wearable device, and a blood pressure measuring device. Background Technology

[0002] Blood pressure, as a key physiological indicator for monitoring human health, acts as a barometer of the body's health status, accurately reflecting the state of bodily functions. To facilitate blood pressure measurement, electronic blood pressure measuring devices have emerged. As medical devices that integrate advanced electronic technology with the principle of indirect blood pressure measurement, they occupy a pivotal position in the field of blood pressure measurement and are key tools for diagnosing and monitoring cardiovascular diseases.

[0003] The gas flow system is a crucial component of electronic blood pressure monitoring devices. It typically consists of an air pump, an air valve, an air bladder, and a sensor. During blood pressure measurement, the air pump delivers airflow, which flows through the air valve into the air bladder. The air bladder inflates and compresses the blood vessel. Blood pressure fluctuations within the vessel are transmitted to the sensor as a pulse wave signal via the air bladder. The sensor detects this pulse wave signal, and the device's processor calculates the blood pressure value based on the detected pulse wave signal. After the blood pressure measurement is complete, the air pump stops operating, and the gas inside the air bladder is released through the air valve.

[0004] Among them, how to design the structure of the air valve to achieve efficient and reliable air leakage of the air circuit system has become one of the important issues in the industry. Summary of the Invention

[0005] Embodiments of this application provide an air valve, an air circuit system, a wearable device, and a blood pressure measuring device to address the problem of low operational reliability of the air circuit system in blood pressure measuring devices in related technologies.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a valve, including a valve body and a diaphragm disposed within the valve body. The diaphragm has a first side and a second side facing each other. The valve body has a first cavity located on the first side and a second cavity located on the second side. The valve body is provided with a first contact portion and a second contact portion. The first contact portion is located on the first side and is disposed adjacent to the first cavity, forming a venting chamber. The venting chamber has an opening on the side near the diaphragm, and the second contact portion is located on the second side. The outer surface of the valve body is provided with a first vent, a second vent, and a venting hole. The first vent communicates with the first cavity, the second vent communicates with the second cavity, and the venting hole communicates with the venting chamber. The diaphragm is a flexible membrane and includes a first diaphragm region and a second diaphragm region. The first diaphragm region is opposite to the first contact portion and has a first vent. The second diaphragm region is opposite to the second contact portion and has a second vent. When the air pressure on the second side of the diaphragm is greater than the air pressure in the first cavity, the first diaphragm region contacts the first contact portion to close the cavity opening and the first vent, thus blocking the communication between the second cavity and the venting cavity; and the second diaphragm region at least partially separates from the second contact portion, allowing the second vent to communicate with the first cavity through the second vent. When the air pressure in the first cavity is greater than the air pressure on the second side of the diaphragm, the first diaphragm region separates from the first contact portion to open the cavity opening and the first vent, thus connecting the first cavity with the venting cavity and the second cavity respectively; and the second diaphragm region contacts the second contact portion to block the second vent from communicating with the first cavity through the second vent.

[0008] In this embodiment of the air valve, the first contact portion forms a venting chamber, and the venting chamber has an opening on the side near the diaphragm. The first diaphragm area has a first vent, and the second diaphragm area has a second vent. When the airbag deflates, the pressure difference between the first and second sides of the diaphragm causes the diaphragm to open the opening, the first vent, and close the second vent, connecting the first vent to the vent and the second vent respectively. Thus, the gas in the airbag can vent through two channels: one formed by the first cavity, the venting chamber, and the vent, and the other formed by the first cavity, the first vent, the second cavity, and the second vent. This not only improves the airbag's deflation efficiency but also ensures normal airbag deflation even if one deflation channel is blocked, thereby improving the reliability of the air system.

[0009] In some embodiments of the first aspect, the first contact portion includes a first boss and an annular wall surrounding the first boss, with an annular groove between the annular wall and the first boss, the annular groove serving as a venting cavity; the first boss has a first contact surface, and the annular wall has a second contact surface; when the air pressure on the second side of the diaphragm is greater than the air pressure in the first cavity, the first diaphragm area contacts the first contact surface and the second contact surface; when the air pressure in the first cavity is greater than the air pressure on the second side of the diaphragm, the first diaphragm area separates from the first contact surface and the second contact surface. This configuration improves the sealing effect of the first diaphragm area on the venting cavity during airbag inflation. Simultaneously, the first boss and the annular wall provide better support for the first diaphragm area, preventing excessive indentation of the first diaphragm area into the venting cavity under the influence of air pressure difference, thus preventing damage to the diaphragm.

[0010] In some embodiments of the first aspect, the first contact surface includes a first central region and a first peripheral region surrounding the first central region, wherein the first central region is the orthographic projection of the first vent onto the first contact surface. This arrangement helps to improve the sealing effect of the first vent, preventing gas from the second cavity from entering the deflation chamber and leaking out through the first vent when the airbag is inflated.

[0011] In some embodiments of the first aspect, the first contact surface and the second contact surface are flush. This arrangement allows for better sealing of the vent chamber and the first vent, preventing gas from the second cavity from entering the vent chamber and leaking out when the airbag is inflated.

[0012] In some embodiments of the first aspect, the first contact surface protrudes beyond the second contact surface. This arrangement allows for better sealing of the vent chamber and the first vent, preventing gas from the second cavity from entering and leaking out during airbag inflation.

[0013] In some embodiments of the first aspect, the edges of the second contact surface are rounded. This configuration further improves the sealing effect of the first diaphragm region on the venting chamber when the airbag is inflated.

[0014] The rounded corner can be located at the outer edge of the second contact surface, or at the inner edge of the second contact surface, or at both the outer edge and the inner edge of the second contact surface respectively.

[0015] In some embodiments of the first aspect, vent holes are located at the position of the first contact portion, and there are multiple vent holes arranged circumferentially along the first contact portion. This arrangement can improve the deflation efficiency of the airbag.

[0016] In some embodiments of the first aspect, the second contact portion has a third contact surface, which includes a second central region and a second peripheral region surrounding the second central region. The second central region is the orthographic projection of the second vent onto the third contact surface. When the air pressure in the second cavity is greater than the air pressure in the first cavity, the second diaphragm region separates from the second peripheral region to open the second vent, allowing the second cavity to communicate with the first cavity through the second vent. When the air pressure in the first cavity is greater than the air pressure in the second cavity, the second diaphragm region contacts the second peripheral region to close the second vent. This configuration simplifies the diaphragm structure, thereby reducing the design and manufacturing costs of the diaphragm. Simultaneously, when the airbag deflates, it improves the sealing effect on the second vent, preventing gas from entering the second cavity through the second vent and causing a decrease in the air pressure in the first cavity, which would affect the opening of the deflation chamber by the first diaphragm region.

[0017] In some embodiments of the first aspect, the second contact portion is a second protrusion disposed within the valve body, and the second contact portion contacts the second diaphragm region so that the second diaphragm region protrudes towards the first side. This arrangement allows for a tighter contact between the second diaphragm region and the third contact surface, improving the sealing effect on the second vent when the airbag deflates. This prevents gas from entering the second cavity through the second vent, thus avoiding a decrease in the air pressure of the first cavity and affecting the opening of the deflation chamber by the first diaphragm region.

[0018] In some embodiments of the first aspect, the valve body includes a first valve wall, a second valve wall, and a valve sidewall connecting the first valve wall and the second valve wall. The valve sidewall includes the first valve sidewall, which is disposed at a first edge of the second valve wall. A second contact portion is disposed on the second valve wall and located at the first edge. One edge of the diaphragm is connected to a first position on the first valve sidewall, and the height of the first position relative to the second valve wall is less than the height of the second contact portion protruding from the second valve wall. This arrangement allows the second contact portion to push the second diaphragm area towards the first side of the diaphragm, thereby keeping the second diaphragm area in a taut state. This arrangement eliminates the need for additional components, making the structure inside the valve body simpler and thus helping to reduce the design and manufacturing costs of the valve body.

[0019] In some embodiments of the first aspect, the second vent includes a first sub-hole and a second sub-hole disposed on the outer surface of the valve body. The first sub-hole communicates with the second cavity. The second contact portion has a third contact surface, and the second sub-hole penetrates the third contact surface and is opposite to the second vent. The second diaphragm region includes a connecting region and a tongue. The connecting region is located around the second vent and is sealed to the third contact surface. The tongue has a first connecting end connected to the edge of the second vent, allowing the tongue to swing relative to the connecting region, thereby allowing the tongue to contact and separate from the third contact surface. When the air pressure on the second side of the diaphragm is greater than the air pressure in the first cavity, the tongue separates from the third contact surface to open the second sub-hole, allowing the second sub-hole to communicate with the first cavity through the second vent. When the air pressure in the first cavity is greater than the air pressure on the second side of the diaphragm, the tongue contacts the third contact surface to close the second sub-hole. The tongue can be integral with the connecting region or can be disposed separately. With this configuration, when the airbag deflates, the tongue can quickly close the second sub-hole under the action of the air pressure difference, thereby preventing gas from leaking out from the second vent and the second sub-hole, which would cause a decrease in the air pressure of the first cavity and affect the opening of the deflation chamber in the first diaphragm area.

[0020] In some embodiments of the first aspect, the valve body includes a first valve wall, a second valve wall, and a valve side wall connecting the first valve wall and the second valve wall; a first vent is disposed on the first valve wall, and a second contact portion is disposed on the second valve wall; both the first vent and the second sub-vent are opposite to the tongue, and the distance from the first vent to the first connecting end is greater than the distance from the second sub-vent to the first connecting end. This configuration facilitates the rapid closing of the second sub-vent by the tongue when the airbag deflates, thereby preventing gas leakage from the second sub-vent from causing a pressure drop in the first cavity, which would affect the opening of the deflation chamber in the first diaphragm region.

[0021] In some embodiments of the first aspect, the valve body includes a first valve wall, a second valve wall, and a valve sidewall connecting the first valve wall and the second valve wall. The valve sidewall includes a first valve sidewall disposed at a first edge of the second valve wall, and a second contact portion disposed on the second valve wall and located at the first edge. A first vent is disposed on the first valve sidewall, and when the tongue separates from the third contact surface, the orthographic projection of the tongue on the first valve sidewall at least partially overlaps with the first vent. This arrangement facilitates the rapid closure of the second sub-orifice by the tongue when the airbag deflates; simultaneously, it avoids interference between the first vent and other structures on the first valve wall, thereby promoting an optimized layout of the valve body structure.

[0022] In some embodiments of the first aspect, the second diaphragm region further includes an elastic element connected between the edge of the tongue and the edge of the second vent. The elastic element applies an elastic force to the tongue, causing it to move towards the third contact surface. When the tongue contacts the third contact surface, it is positioned within the second vent, and the elastic element is located in the gap between the edge of the tongue and the second vent. This configuration allows the tongue to quickly close the second vent when the airbag deflates.

[0023] In some embodiments of the first aspect, the tongue further has a second connecting end, the second connecting end and the first connecting end being opposite ends of the tongue along a first direction; the elastic member includes a first elastic member, one end of which is connected to the second connecting end, and the other end of which extends away from the first connecting end and is connected to the edge of the second vent. With this configuration, the first elastic member can constrain the movement of the second connecting end of the tongue, preventing large-amplitude shaking during the tongue's movement, thus making the tongue's movement more stable.

[0024] In some embodiments of the first aspect, the tongue further has a second connecting end, the second connecting end and the first connecting end being opposite ends of the tongue along a first direction; the elastic element includes a first elastic element, one end of which is connected to the second connecting end, and the other end of which extends away from the first connecting end and is connected to the edge of the second vent; the elastic element includes two second elastic elements, distributed on opposite sides of the tongue along a second direction, each second elastic element connecting the edge of the corresponding side of the tongue to the edge of the second vent; wherein the first direction, the second direction, and the thickness direction of the tongue are perpendicular to each other. With this configuration, the first elastic element can constrain the movement of the second connecting end, and the second elastic element can constrain the movement of the sides of the tongue, preventing wobbling during the tongue's swing and thus making the tongue's movement more stable.

[0025] In some embodiments of the first aspect, the tongue further has a second connecting end, which, along with the first connecting end, are opposite ends of the tongue along a first direction. The elastic element includes two second elastic elements distributed on opposite sides of the tongue along a second direction. Each second elastic element connects the edge of the corresponding side of the tongue to the edge of the second vent. The first direction, the second direction, and the thickness direction of the tongue are all perpendicular to each other. This configuration allows the second elastic elements to constrain the movement of the sides of the tongue, preventing large-amplitude swaying during tongue movement and thus ensuring stable tongue movement.

[0026] In some embodiments of the first aspect, a limiting protrusion is provided on the cavity wall of the first cavity, and a movement space is formed between the limiting protrusion and the third contact surface, with at least a portion of the tongue extending into the movement space. This arrangement allows the limiting protrusion to limit the swing amplitude of the tongue, thereby preventing the elastic element from being torn by the large swing of the tongue when the intake air pressure of the second sub-hole is relatively high.

[0027] In some embodiments of the first aspect, the tongue, elastic element, and connecting area are integrated into a single structure. This arrangement reduces the number of components of the diaphragm, making the diaphragm structure simpler and thus facilitating its fabrication and installation.

[0028] In some embodiments of the first aspect, the tongue and the elastic element are respectively disposed separately from the connecting parts.

[0029] In some embodiments of the first aspect, the second diaphragm region further includes a reinforcing sheet, which is stacked with the tongue. This arrangement increases the stiffness of the tongue, reducing its deformation and ensuring more stable movement of the tongue during airbag inflation and deflation.

[0030] In some embodiments of the first aspect, the reinforcing sheet is a metal sheet or a plastic sheet.

[0031] Secondly, embodiments of this application provide an air circuit system, including an air pump, an air bag, and an air valve as described in any embodiment of the first aspect; the air bag is connected to the first air hole of the air valve through a first air circuit, and the air pump is connected to the second air hole of the air valve through a second air circuit, and the air pump can release the gas flowing into the air pump from the second air circuit.

[0032] The air pump has an air inlet and an air outlet. The air outlet is connected to the second air hole of the air valve through the second air passage. The air inlet is connected to the outside atmosphere. The air vent of the air valve is connected to the outside atmosphere.

[0033] The beneficial effects of the pneumatic system in this embodiment are the same as those of the pneumatic valve in the first aspect, and will not be repeated here.

[0034] In some embodiments of the second aspect, the air pump includes a pump body and a drive component. The pump body has a pump cavity and an air outlet and an air inlet respectively communicating with the pump cavity. The drive component is disposed in the pump cavity, and a pump cavity gap is formed between the drive component and the inner wall of the pump cavity. The pump cavity gap is connected to both the air outlet and the air inlet. With this configuration, the air pump can release the gas flowing into the air pump from the second air passage.

[0035] In some embodiments of the second aspect, the driving component is an impeller or a piezoelectric vibrator.

[0036] Thirdly, embodiments of this application provide a wearable device, including a housing, a strap, and the air system described in the second aspect. The air pump and air valve of the air system are disposed in the housing, the strap is connected to the housing, and the airbag of the air system is disposed in the strap.

[0037] The air valve's vent hole is connected to the shell vent on the housing via a venting air passage, and the air pump's suction port is connected to the connection port on the housing via a third air passage. Both the shell vent and the connection port are connected to the outside atmosphere.

[0038] The beneficial effects of the wearable device in this embodiment are the same as those of the gas valve in the first aspect, and will not be repeated here.

[0039] In some embodiments of the third aspect, the wearable device is a smartwatch or a smart bracelet.

[0040] Fourthly, embodiments of this application provide a blood pressure measuring device, including a housing, a strap, and the air circuit system described in the second aspect. The air pump and air valve of the air circuit system are disposed in the housing, and the air bladder of the air circuit system is disposed in the strap.

[0041] The air valve's vent hole is connected to the shell vent on the housing via a venting air passage, and the air pump's suction port is connected to the connection port on the housing via a third air passage. Both the shell vent and the connection port are connected to the outside atmosphere.

[0042] The beneficial effects of the blood pressure measuring device in this embodiment are the same as those of the air valve in the first aspect, and will not be repeated here.

[0043] In some embodiments of the fourth aspect, the blood pressure measuring device is an upper arm blood pressure monitor or a wrist blood pressure monitor. The wrist blood pressure monitor can be a wearable device, such as a smartwatch or smart bracelet. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of a blood pressure measuring device in related technologies;

[0045] Figure 2 This is a schematic diagram of the structure of a wearable device (smartwatch) in some embodiments of this application;

[0046] Figure 3 for Figure 2 The illustration shows a wearable device worn on the wrist.

[0047] Figure 4 for Figure 2 The diagram shows the positional relationship between the strap and the wrist when the wearable device is worn on the wrist.

[0048] Figure 5 for Figure 2 The image shows an AA cross-sectional view of the wearable device.

[0049] Figure 6 for Figure 5 A magnified view of the left edge of the wearable device shown.

[0050] Figure 7 for Figure 2 The diagram shown is a schematic of the wearable device.

[0051] Figure 8 This is a top view of the air valve in the first embodiment of this application;

[0052] Figure 9 for Figure 8 The BB cross-sectional view of the air valve shown;

[0053] Figure 10 As shown Figure 8 The diagram shows the state of the air valve when the airbag is inflated.

[0054] Figure 11 As shown Figure 8 The diagram shows the state of the air valve when the airbag deflates;

[0055] Figure 12 for Figure 9 A bottom view of the first half of the valve body shown in the figure;

[0056] Figure 13 for Figure 9 A top view of the second half of the valve body shown;

[0057] Figure 14 This is a schematic diagram showing a connection between the edge of the diaphragm of the air valve and the valve sidewall in the first embodiment of this application;

[0058] Figure 15 This is a schematic diagram of the structure of the air valve in the second embodiment of this application;

[0059] Figure 16 for Figure 15 A partial enlarged view of the air valve shown;

[0060] Figure 17 for Figure 15 A bottom view of the first structure of the first half-valve body shown in the figure;

[0061] Figure 18 To and Figure 17 A top view of the first half of the valve body relative to the second half of the valve body shown in the diagram;

[0062] Figure 19 for Figure 15 A bottom view of the second structure of the first half-valve body shown in the figure;

[0063] Figure 20 for Figure 19 A schematic diagram of the first half-valve body from another perspective;

[0064] Figure 21 This is a top view of the air valve in the third embodiment of this application;

[0065] Figure 22 for Figure 21 The shown is a CC cross-sectional view of the air valve;

[0066] Figure 23 for Figure 22 The top view of the second half of the valve body is shown;

[0067] Figure 24 for Figure 22 A DD cross-sectional view of the air valve shown;

[0068] Figure 25 for Figure 24 A magnified view of a portion of the diaphragm shown;

[0069] Figure 26 for Figure 22 The diagram shows the state of the air valve when the airbag is inflated.

[0070] Figure 27 for Figure 26 A partial enlarged view of the air valve shown;

[0071] Figure 28 for Figure 22 The diagram shows the state of the air valve when the airbag deflates;

[0072] Figure 29 for Figure 28 A partial enlarged view of the air valve shown;

[0073] Figure 30 for Figure 22 Another DD cross-sectional view of the air valve shown;

[0074] Figure 31 for Figure 30 A magnified view of a portion of the diaphragm shown;

[0075] Figure 32 This is a partial enlarged view of the air valve at the second contact portion in the fourth embodiment of this application;

[0076] Figure 33 This is a partial enlarged view of the air valve at the second contact portion in the fifth embodiment of this application;

[0077] Figure 34 This is a partial enlarged view of the air valve at the second contact portion in the sixth embodiment of this application;

[0078] Figure 35 This is a partial enlarged view of the air valve at the second contact portion in the seventh embodiment of this application. Detailed Implementation

[0079] Blood pressure, as a key physiological indicator for monitoring human health, acts as a barometer of the body's health status, accurately reflecting the state of bodily functions. To facilitate blood pressure measurement, electronic blood pressure measuring devices have emerged. As medical devices that integrate advanced electronic technology with the principle of indirect blood pressure measurement, they occupy a pivotal position in the field of blood pressure measurement and are key tools for diagnosing and monitoring cardiovascular diseases.

[0080] The gas supply system is a crucial component of electronic blood pressure monitoring devices. It typically consists of an air pump, a valve, an air bladder, and a sensor. The air bladder is attached to a strap that is wrapped around the arm or wrist. During blood pressure measurement, the air pump delivers airflow through the valve into the air bladder. The bladder inflates, compressing the blood vessel. The blood pressure fluctuations within the vessel are transmitted to the sensor as a pulse wave signal via the air bladder. The sensor detects this pulse wave signal, and the device's processor calculates the blood pressure value based on this signal. After the measurement, the air pump stops, and the air inside the air bladder is deflated through the valve.

[0081] Among them, how to design the structure of the air valve to achieve efficient and reliable air leakage of the air circuit system has become one of the important issues in the industry.

[0082] Figure 1 This is a schematic diagram of a blood pressure measuring device in related technologies, such as... Figure 1 As shown, the pressure measuring device includes a housing 400 and an air circuit system 300.

[0083] The pneumatic system 300 includes an air pump 210, an air valve 100, and an air bag 220. The air pump 210 and the air valve 100 are disposed in the housing 400. The air valve 100 includes a valve body 1 and a diaphragm 2 disposed within the valve body 1. The diaphragm 2 divides the space within the valve body 1 into a first cavity 11 and a second cavity 12. The first cavity 11 is located on the first side of the diaphragm 2 (e.g., ...). Figure 1 The second cavity 12 is located on the second side of the diaphragm 2 (as shown above). Figure 1 (As shown on the lower side).

[0084] The valve body 1 is provided with a first contact portion 13 and a second contact portion 14. Both the first contact portion 13 and the second contact portion 14 are boss structures. The first contact portion 13 is located on the first side of the diaphragm 2, and the second contact portion 14 is located on the second side of the diaphragm 2.

[0085] The diaphragm 2 is a flexible membrane. The diaphragm 2 includes a first diaphragm region 21 and a second diaphragm region 22. The first diaphragm region 21 is opposite to the first contact portion 13, and the second diaphragm region 22 is opposite to the second contact portion 14. The second diaphragm region 22 is provided with a second vent 221.

[0086] The outer surface of the valve body 1 is provided with a first air hole 161, a second air hole 162 and a vent hole 163. The first air hole 161 is connected to the first cavity 11, the second air hole 162 is connected to the second cavity 12, and the vent hole 163 penetrates the side surface of the first contact part 13 near the diaphragm 2. The vent hole 163 is connected to the shell vent 401 on the housing 400 through the vent passage 250. The shell vent 401 is connected to the outside.

[0087] The airbag 220 is connected to the first air hole 161 through the first air passage 230, the air outlet 2101 of the air pump 210 is connected to the second air hole 162 through the second air passage 240, and the air inlet 2102 of the air pump 210 is connected to the connection port 402 on the housing 400 through the third air passage 260. The connection port 402 is connected to the outside.

[0088] When measuring blood pressure, the air pump 210 starts working. The air outlet 2101 of the air pump 210 introduces gas into the second cavity 12 of the air valve 100 through the second air passage 240, making the air pressure in the second cavity 12 greater than the air pressure in the first cavity 11. Under the action of the air pressure difference, the first diaphragm area 21 of the diaphragm 2 comes into contact with the first contact part 13 to close the vent hole 163, thus blocking the connection between the vent hole 163 and the first cavity 11. At the same time, the second diaphragm area 22 of the diaphragm 2 separates from the second contact part 14 to open the second vent 221, so that the first cavity 11 and the second cavity 12 are connected. Gas enters the air bag 220 through the second cavity 12, the second vent 221, the first cavity 11, and the first air passage 230, and the air bag 220 begins to inflate.

[0089] When the blood pressure measurement is finished, the air pump 210 stops working, and the gas in the air bag 220 enters the first cavity 11 of the air valve 100 through the first air passage 230, making the air pressure in the first cavity 11 greater than the air pressure in the second cavity 12. Under the action of the air pressure difference, the second diaphragm area 22 of the diaphragm 2 comes into contact with the second contact part 22 to close the second vent 221, thus blocking the communication between the first cavity 11 and the second cavity 12. At the same time, the first diaphragm area 21 of the diaphragm 2 separates from the first contact part 13 to open the vent hole 163, so that the vent hole 163 is connected to the first cavity 11, and the gas is released from the first cavity 11, the vent hole 163, the vent passage 250 and the shell vent 401 to the outside of the shell 400.

[0090] In the related technology, the valve 100 allows the airbag 220 to deflate through the venting channel formed by the venting hole 163, the venting air passage 250, and the venting port 401 of the housing after the blood pressure measurement is completed. However, since the venting channel is connected to the outside of the housing 400, after the blood pressure measuring device has been used for a period of time, external dust and other impurities can easily enter the venting channel and block it, thereby causing abnormal deflation of the airbag 220 and reducing the working reliability of the air circuit system 300 of the blood pressure measuring device.

[0091] Therefore, this application provides an air valve, an air circuit system, a wearable device, and a blood pressure measuring device. By improving the structure of the first contact part and the diaphragm, when the air bag deflates, the first air hole of the air valve is connected to the second air hole and the vent hole respectively. The gas in the air bag can be released simultaneously through the two venting channels of the second air hole and the vent hole to the outside of the housing of the blood pressure measuring device. This not only improves the deflation efficiency of the air bag, but also improves the working reliability of the air circuit system.

[0092] The blood pressure measuring device in this application embodiment can be an upper arm blood pressure monitor or a wrist blood pressure monitor, and no specific limitation is made here. Among them, the wrist blood pressure monitor can be a wearable device, such as a smartwatch or smart bracelet.

[0093] The following uses a smartwatch as an example to describe the structure of the blood pressure measuring device in this application embodiment. Other types of blood pressure measuring devices can be set up by referring to the relevant structures in the smartwatch embodiment, and will not be described in detail here.

[0094] Figure 2 This is a schematic diagram of the structure of a wearable device (smartwatch) in some embodiments of this application. Figure 3 for Figure 2 The illustration shows the wearable device when worn on the wrist at a 70° angle. Figure 4 for Figure 2 The diagram shows the positional relationship between the strap 500 and the wrist 700 when the wearable device is worn on the wrist 700.

[0095] like Figure 2 , Figure 3 as well as Figure 4 As shown, the wearable device includes a housing 400 and a strap 500, which is connected to the housing 400.

[0096] There can be two straps 500, namely strap 500a and strap 500b. Straps 500a and strap 500b are respectively connected to opposite sides of the housing 400. Straps 500a and strap 500b can be connected together by a connecting structure 800 so that straps 500a and strap 500b and housing 400 form a ring structure. This ring structure can be put on the wrist 700 of the human body. The housing 400 is located on the back side of the wrist 700 (that is, the side away from the artery 710).

[0097] Among them, straps 500a and 500b can be detachably connected to the housing 400 or fixedly connected to the housing 400, without specific limitations.

[0098] In some embodiments, the connecting structure 800 can be a hook and loop fastener, which includes a first sub-attachment with a hook side and a second sub-attachment with a loop side. The first sub-attachment can be disposed on the strap 500b, and the second sub-attachment can be disposed on the strap 500a. The first sub-attachment and the second sub-attachment can be connected to each other so that the strap 500a and the strap 500b are connected together.

[0099] Among them, such as Figure 4 As shown, the first sub-attachment can be set on the inner surface of the strap 500b (e.g., Figure 4 The second sub-attachment can be disposed on the outer surface of the strap 500a (e.g., the surface of the strap 500b near the wrist 700). Figure 4 As shown in the diagram, when the first sub-attachment is connected to the second sub-attachment, the end of the strap 500a (i.e. the end away from the housing 400) is located inside the strap 500b, and the end of the strap 500b (i.e. the end away from the housing 400) is located outside the strap 500a.

[0100] Of course, the connection structure 800 can also be other connection structures besides Velcro, such as magnetic attraction structure, locking structure, etc., depending on the actual situation.

[0101] Figure 5 for Figure 2 The image shows an AA cross-sectional view of the wearable device. Figure 6 for Figure 5 A magnified view of the left edge of the wearable device shown. Figure 7 for Figure 2 The diagram shown is a schematic of a wearable device.

[0102] like Figure 5 , Figure 6 and Figure 7As shown, the wearable device also includes a display screen 620, a processor 610, and an air supply system 300. The display screen 620 is mounted on the housing 400, and a portion of the air supply system 300 and the processor 610 are also located in the housing 400.

[0103] The display screen 620 can be a liquid crystal display screen, an OLED (Organic Light-Emitting Diode) display screen, a QLED (Quantum Dot Light-Emitting Diode) display screen, a Micro LED display screen, an electronic ink display screen, etc., without any specific limitations.

[0104] In some embodiments, such as Figure 5 and Figure 6 As shown, the housing 400 includes a middle frame 410 (also called a front shell or front frame) and a rear cover 420 (also called a battery cover), with the middle frame 410 disposed between the display 620 and the rear cover 420.

[0105] The mid-frame 410 has an H-shaped cross-section and includes a bottom wall 411 and a side wall 412 disposed at the edge of the bottom wall 411. The edge of the display screen 620 is connected to the side wall 412, for example, by bonding. The display screen 620, the bottom wall 411, and the side wall 412 form a first receiving space 430, within which accessories 630 for the display screen 620 are disposed. For example, when the display screen 620 is a liquid crystal display, the accessory 630 may be a backlight; or, when the display screen 620 is an OLED display, the accessory 630 may be a support film, a heat dissipation film, etc.

[0106] The edge of the back cover 420 is connected to the side wall 412 of the middle frame, for example, by snap-fit. The back cover 420, the bottom wall 411 of the middle frame, and the side wall 412 of the middle frame form a second receiving space 440. The second receiving space 440 is used to house the processor 610 and a part of the air circuit system 300.

[0107] Of course, the 410 mid-frame is not limited to Figure 5 The structure shown can also be configured with other structures depending on the actual situation. For example, the middle frame 410 may not include the bottom wall 411, and the middle frame side wall 412 may have a supporting flange that extends inward to support the edge of the accessory 630. In the configuration where the middle frame 410 does not include the bottom wall 411, the back cover 420 may be an integral structure with the middle frame side wall 412, or it may be separate from the middle frame side wall 412. For example, the edge of the back cover 420 may be glued or snapped onto the middle frame side wall 412.

[0108] like Figure 6 and Figure 7 As shown, the air system 300 includes an air pump 210, an air valve 100, and an airbag 220. The air pump 210 and the air valve 100 are disposed in the housing 400 (e.g., in the second receiving space 440), and the airbag 220 is disposed in the strap 500, for example... Figure 6 As shown, the airbag 220 is located inside the strap 500a, i.e. Figure 6 The lower side of the strap 500a shown.

[0109] The air valve 100 has a first air hole 161, a second air hole 162, and a vent hole 163. The air bag 220 is connected to the first air hole 161 through the first air passage 230. The air outlet 2101 of the air pump 210 is connected to the second air hole 162 through the second air passage 240. The air inlet 2102 of the air pump 210 is connected to the connection port 402 on the housing 400 through the third air passage 260. The connection port 402 is connected to the outside atmosphere. The vent hole 163 is connected to the shell vent port 401 on the housing 400 through the vent passage 250. The shell vent port 401 is connected to the outside atmosphere.

[0110] To facilitate the connection between the first air vent 161 and the airbag 220, in some embodiments, such as Figure 6 As shown, the air valve 100 is located on the edge of the housing 400 near the strap 500a (i.e., the strap 500 on which the airbag 220 is located), and the first air hole 161 of the air valve 100 faces the side where the strap 500a is located (e.g., Figure 6 (As shown on the left side). This configuration allows the first air vent 161 to be closer to the airbag 220, thereby shortening the length of the first air passage 230 and facilitating the connection between the first air vent 161 and the airbag 220.

[0111] In some embodiments, the first air passage 230 may be composed of a pipe and an inner hole, such as... Figure 6 As shown, the first air passage 230 includes a first pipe 231, a first inner hole 232 disposed in the side wall 412 of the middle frame, and a second inner hole 233 disposed in the strap 500. The second inner hole 233 is connected to the airbag 220, the first pipe 231 is connected to the first air hole 161, and the first inner hole 232 is connected between the first pipe 231 and the second inner hole 233. Of course, it can also be limited to this, the first air passage 231 can be entirely a pipe, and a part of the pipe can be embedded in the side wall 412 of the middle frame and the strap 500.

[0112] To facilitate the connection of the vent 163 to the shell vent 401 via the vent passage 250, in some embodiments, such as... Figure 6As shown, the vent 401 and the valve 100 are both located at the edge of the housing 400, and the vent 401 is opposite to the vent hole 163. This shortens the length of the venting passage 250, making it easier for the vent hole 163 to connect to the vent 401 through the venting passage 250.

[0113] Among them, such as Figure 6 As shown, the venting passage 250 can be a pipe, and the venting port 401 is a through hole that penetrates the side wall 412 of the middle frame.

[0114] To facilitate the connection of the air outlet 2101 of the air pump 210 to the second air port 162 via the second air passage 240, in some embodiments, such as Figure 6 As shown, both the air valve 100 and the air pump 210 are located at the edge of the housing 400, and the air outlet 2101 is located on the side of the air pump 210 near the second air hole 162. This arrangement can shorten the length of the second air passage 240, thereby facilitating the connection of the air outlet 2101 of the air pump 210 to the second air hole 162 through the second air passage 240.

[0115] Among them, such as Figure 6 As shown, the second gas passage 240 can be a pipeline.

[0116] To facilitate the connection of the air pump 2100's intake port 2102 to the connection port 402 via the third air passage 260, in some embodiments, such as Figure 6 As shown, the air intake 2102 is located on the side of the air pump 210 near the connection port 402. This arrangement can shorten the length of the third air passage 260, thereby facilitating the connection of the air pump 210's air intake 2102 to the connection port 402 via the third air passage 260.

[0117] In some embodiments, such as Figure 6 As shown, both the air valve 100 and the air pump 210 are located at the edge of the middle frame 410. The air valve 100 is located between the side wall 412 of the middle frame and the air pump 210. The air intake port 2102 is located on the side of the air pump 210 near the air valve 100. The connection port 402 is a connection hole provided on the rear cover 420. The first end of the connection port 402 (e.g.) Figure 6 The right end of the connection port 402 shown is located between the air valve 100 and the air pump 210, and is connected to the air intake port 2102 through the third air passage 260. This facilitates the arrangement of the third air passage 260 and avoids interference between the third air passage 260 and the air valve 100.

[0118] Among them, such as Figure 6 As shown, the third air passage 260 can be a pipeline.

[0119] In some embodiments, such as Figure 6 As shown, the second end of the connector 402 (e.g.) Figure 6The left end of the connection port 402 (as shown) extends to the side of the back cover 420. This design prevents the wrist 700 from blocking the connection port 402 when the wearable device is worn on the wrist, thus ensuring that the air pump 210 can draw air normally during operation.

[0120] To facilitate power supply to the air pump 210, in some embodiments, such as Figure 6 As shown, the air pump 210 is mounted on the circuit board 640.

[0121] In some embodiments, such as Figure 7 As shown, the air pump 210 includes a pump body 2103 and a drive component 2105. The pump body 2103 has a pump cavity 2104. An air outlet 2101 and an air inlet 2102 are both disposed on the pump body 2103 and are respectively connected to the pump cavity 2104. The drive component 2105 is disposed in the pump cavity 2104, and a pump cavity gap 2106 is formed between the drive component 2105 and the inner wall of the pump cavity 2104. The pump cavity gap 2106 is connected to both the air outlet 2101 and the air inlet 2102. The drive component 2105 can be an impeller or a piezoelectric vibrator; no specific limitation is made here.

[0122] In some embodiments, such as Figure 5 and Figure 7 As shown, the processor 610 is mounted on the circuit board 640 and electrically connected to the air pump 210 to control the operation of the air pump 210. The processor 610 can be a system on chip (SOC), a microcontroller (MCU), a microprocessor (MPU), a central processing unit (CPU), etc.

[0123] In some embodiments, such as Figure 7 As shown, the airway system 300 also includes a pressure sensor 270, which is connected to the first air port 161 via a fourth airway 280. The pressure sensor 270 is electrically connected to the processor 610. Since both the airbag 220 and the pressure sensor 270 are connected to the first air port 161, the pressure sensor 270 can detect pressure changes in the airbag 220 when measuring blood pressure, and the processor 610 can calculate the blood pressure value based on these pressure changes.

[0124] Figure 8 This is a top view of the air valve 100 in the first embodiment of this application. Figure 9 for Figure 8 The BB section view of the air valve 100 shown is shown. Figure 10 As shown Figure 8 The diagram shown illustrates the state of the air valve 100 when the airbag 220 is inflated. Figure 11 As shown Figure 8The diagram shows the state of the air valve 100 when the airbag 220 is deflated.

[0125] like Figure 8 and Figure 9 As shown, the air valve 100 includes a valve body 1 and a diaphragm 2 disposed within the valve body 1. The diaphragm 2 has a first side and a second side opposite to each other. The valve body 1 has a first side (e.g., the first side is located on the second side). Figure 9 The first cavity 11 on the upper side of the diaphragm 2 shown, and the cavity on the second side (e.g., the upper side of the diaphragm 2 shown), and the cavity on the second side (e.g., the upper side of the diaphragm 2 shown) Figure 9 The second cavity 12 (under the diaphragm 2 shown).

[0126] The valve body 1 is provided with a first contact portion 13 and a second contact portion 14. The first contact portion 13 is located on the first side and is adjacent to the first cavity 11. The first contact portion 13 forms a venting cavity 15. The venting cavity 15 has an opening 151 on the side near the diaphragm 2. The second contact portion 14 is located on the second side.

[0127] The outer surface of the valve body 1 is provided with a first air hole 161, a second air hole 162 and a vent hole 163. The first air hole 161 is connected to the first cavity 11, the second air hole 162 is connected to the second cavity 12, and the vent hole 163 is connected to the vent cavity 15.

[0128] The diaphragm 2 is a flexible membrane that can deform under pressure. The diaphragm 2 includes a first diaphragm region 21 and a second diaphragm region 22. The first diaphragm region 21 is opposite to the first contact portion 13 and is provided with a first vent 211. The second diaphragm region 22 is opposite to the second contact portion 14 and is provided with a second vent 221.

[0129] like Figure 10 As shown, when the air pressure on the second side of the diaphragm 2 is greater than the air pressure in the first cavity 11 (that is, when the airbag 220 is inflated), under the action of the air pressure difference between the first and second sides of the diaphragm 2, the first diaphragm region 21 contacts the first contact portion 13 to close the cavity opening 151 and the first vent 211, thereby blocking the communication between the second cavity 12 and the venting cavity 15; and the second diaphragm region 22 is at least partially separated from the second contact portion 14, so that the second vent 162 communicates with the first cavity 11 through the second vent 221; in this way, the gas enters the airbag 220 along the air intake channel formed by the second cavity 12-the second vent 221-the first cavity 11-the first air passage 230, and the airbag 220 begins to inflate.

[0130] like Figure 11As shown, when the air pressure in the first cavity 11 is greater than the air pressure on the second side of the diaphragm 2 (that is, when the airbag 220 deflates), under the action of the air pressure difference between the first and second sides of the diaphragm 2, the first diaphragm region 21 separates from the first contact portion 13 to open the cavity opening 151 and the first vent 211, so that the first cavity 11 is connected to the deflation cavity 15 and the second cavity 12 respectively; and the second diaphragm region 22 contacts the second contact portion 14 to block the second air hole 162 from communicating with the first cavity 11 through the second vent 221; thus, as Figure 7 and Figure 11 As shown, a portion of the gas is released outside the housing 400 through the venting channel 1 formed by the first cavity 11, the venting cavity 15, the venting hole 163, and the venting air passage 250; another portion of the gas is released outside the housing 400 through the venting channel 2 formed by the first cavity 11, the first vent 211, the second cavity 12, the second vent 162, the second air passage 240, the air pump 210, and the third air passage 260.

[0131] It should be understood that the air pump 210 can release the gas flowing into it from the second air passage 240. The gas can travel through the air pump 210 via the following paths: Figure 7 As shown, the gas leaks out of the air pump 210 along the path formed by the air outlet 2101 - the pump chamber 2104 on the right side of the drive component 2105 - the pump chamber gap 2106 - the pump chamber 2104 on the left side of the drive component 2105 - the air outlet 2101.

[0132] In this embodiment of the air valve 100, the first contact portion 13 forms a venting chamber 15. The venting chamber 15 has an opening 151 on the side near the diaphragm 2. The first diaphragm region 21 has a first vent 211, and the second diaphragm region 22 has a second vent 221. Thus, when the airbag 220 deflates, the pressure difference between the first and second sides of the diaphragm 2 causes the diaphragm 2 to open the opening 151 and the first vent 211, and close the second vent 221, thereby connecting the first air hole 161 with the venting hole 163 and the second air hole 162, respectively. The gas in the airbag 220 can be vented through two channels: the venting channel 1, which is formed by the first cavity 11, the venting cavity 15, the venting hole 163, and the venting air passage 250; and the venting channel 2, which is formed by the first cavity 11, the first vent 211, the second cavity 12, the second vent 162, the second air passage 240, the air pump 210, and the third air passage 260. This not only improves the venting efficiency of the airbag 220, but also ensures that the airbag 220 can still vent normally even if one venting channel is blocked, thereby improving the working reliability of the air system 300.

[0133] In addition, in the embodiments of this application, the connection and disconnection between the air valve 100, the first air hole 161, the second air hole 162 and the vent hole 163 are all completed by the diaphragm 2 under the action of air pressure difference, without consuming electrical energy, which helps to reduce power consumption and thus helps to improve the battery life of wearable devices.

[0134] In some embodiments, such as Figure 9 As shown, the valve body 1 can be a cuboid structure. The valve body 1 includes a first valve wall 171, a second valve wall 172, and a valve side wall 173 connected between the first valve wall 171 and the second valve wall 172. The first valve wall 171, the second valve wall 172, and the valve side wall 173 form the valve cavity of the valve body 1. The edge of the diaphragm 2 is connected to the valve side wall 173. The first contact part 13, the first air hole 161, and the vent hole 163 are all provided on the first valve wall 171, and the second contact part 14 and the second air hole 162 are all provided on the second valve wall 172.

[0135] In some embodiments, such as Figure 9 As shown, along the arrangement direction H of the first valve wall 171 and the second valve wall 172, the valve sidewall 173 includes a first flange 173a and a second flange 173b. The first flange 173a and the first valve wall 171 are integrally formed to form the first half-valve body 1a; the second flange 173b and the second valve wall 172 are integrally formed to form the second half-valve body 1b. The edge of the diaphragm 2 is disposed between the first flange 173a and the second flange 173b, and is bonded to the first flange 173a and the second flange 173b respectively. With this arrangement, the diaphragm 2 can be installed on the valve sidewall 173 by opening and closing the first half-valve body 1a and the second half-valve body 1b, which helps to improve the installation efficiency of the diaphragm 2.

[0136] In some embodiments, such as Figure 9 As shown, the height of the first flange 173a can be equal to the height of the second flange 173b. Of course, it is not limited to this; the height of the first flange 173a can also be greater than the height of the second flange 173b.

[0137] The valve body 1 in this embodiment is not limited to a cuboid structure. The valve body 1 can also be configured into other shapes, such as a spherical structure, or other regular or irregular structures, depending on the actual situation.

[0138] In some embodiments, the first contact portion 13 may be configured as follows, specifically as follows: Figure 9 and Figure 12 As shown, Figure 12 for Figure 9The figure shows a bottom view of the first half-valve body 1a. The first contact portion 13 includes a first boss 131 and an annular wall 132 surrounding the first boss 131. An annular groove is provided between the annular wall 132 and the first boss 131. The annular groove is a venting chamber 15 (that is, the venting chamber 15 is surrounded by the first boss 131 and the annular wall 132). The first boss 131 has a first contact surface 1311, and the annular wall 132 has a second contact surface 1321.

[0139] like Figure 10 As shown, when the air pressure on the second side of the diaphragm 2 is greater than the air pressure in the first cavity 11 (that is, when the airbag 220 is inflated), the first diaphragm area 21 comes into contact with the first contact surface 1311 and the second contact surface 1321; as Figure 11 As shown, when the air pressure in the first cavity 11 is greater than the air pressure on the second side of the diaphragm 2 (that is, when the airbag 220 deflates), the first diaphragm area 21 separates from the first contact surface 1311 and the second contact surface 1321.

[0140] By configuring the first contact portion 13 to include a first boss 131 and an annular wall 132, when the airbag 220 is inflated, the first diaphragm area 21 contacts the second contact surface 1321 of the annular wall 132, which can seal the circumference of the cavity opening 151 of the venting cavity 15. This helps to improve the sealing effect of the first diaphragm area 21 on the venting cavity 15, and prevents the gas in the second cavity 12 from entering the venting cavity 15 and leaking out when the airbag 220 is inflated.

[0141] Meanwhile, when the airbag 220 is inflated, the first protrusion 131 and the annular wall 132 are in contact with the first diaphragm area 21, which can provide better support for the first diaphragm area 21 and prevent the first diaphragm area 21 from excessively sinking into the venting chamber 15 under the action of air pressure difference, thus damaging the diaphragm 2.

[0142] The position of the first vent 211 relative to the first contact portion 13 is not unique. In some embodiments, the first vent 211 may be opposite to the first boss 131, specifically as follows: Figure 9 and Figure 12 As shown, the first contact surface 1311 includes a first central area 1312 and a first peripheral area 1313 surrounding the first central area 1312. The first central area 1312 is the orthographic projection of the first vent 211 on the first contact surface 1311, that is, the first vent 211 is opposite to the first central area 1312.

[0143] By setting the first vent 211 to be opposite to the first central area 1312 of the first protrusion 131, the first diaphragm area 21 can contact the first peripheral area 1313 when the airbag 220 is inflated, so as to seal the circumference of the first vent 211. This helps to improve the sealing effect of the first vent 211 and prevent the gas in the second cavity 12 from entering the vent cavity 15 through the first vent 211 and leaking out when the airbag 220 is inflated.

[0144] In some other embodiments, the first vent 211 may also be opposite to the second contact surface 1321, that is, the orthographic projection of the first vent 211 on the first contact portion 13 is located on the second contact surface 1321.

[0145] The positional relationship between the first contact surface 1311 and the second contact surface 1321 in the height direction H of the first boss 131 is not unique. In some embodiments, such as... Figure 9 As shown, the first contact surface 1311 can be flush with the second contact surface 1321. With this arrangement, when the airbag 220 is inflated, the first diaphragm area 21 can better fit with the first contact surface 1311 and the second contact surface 1321, which helps to increase the contact area between the first diaphragm area 21 and the first contact surface 1311 and the second contact surface 1321. This allows for better sealing of the vent chamber 15 and the first vent 211, preventing gas from the second cavity 12 from entering the vent chamber 15 and leaking out when the airbag 220 is inflated.

[0146] In some embodiments, the first contact surface 1311 may also protrude beyond the second contact surface 1321. With this configuration, when the diaphragm 2 is in its natural state (that is, when the air pressure on the first side and the second side of the diaphragm 2 is balanced), the first protrusion 131 can lift the first diaphragm area 21, putting the first diaphragm area 21 in a taut state. In this way, the first diaphragm area 21 can make closer contact with the first contact surface 1311 and the second contact surface 1321 under the action of tension, thereby better sealing the venting chamber 15 and the first vent 211, preventing gas from the second cavity 12 from entering the venting chamber 15 and leaking out when the airbag 220 is inflated.

[0147] To further improve the sealing effect of the first diaphragm region 21 on the venting chamber 15 when the airbag 220 is inflated, in some embodiments, the edge of the second contact surface 1321 is provided with a rounded corner. This rounded corner can be provided at the outer edge of the second contact surface 1321, at the inner edge of the second contact surface 1321, or at both the outer and inner edges of the second contact surface 1321.

[0148] With this configuration, when the airbag 220 is inflated, the edges of the first diaphragm area 21 and the second contact surface 1321 can have a better contact effect, avoiding gaps at the edges of the first diaphragm area 21 and the second contact surface 1321, thereby further improving the sealing effect of the first diaphragm area 21 on the venting chamber 15.

[0149] To improve the deflation efficiency of the airbag 220, in some embodiments, such as Figure 11 and Figure 12 As shown, a vent 163 is located at the first contact portion 13, and there are multiple vent holes 163 arranged circumferentially along the first contact portion 13. By setting the number of vent holes 163 to multiple, when the airbag 220 deflates, it is beneficial for gas to quickly escape from the vent chamber 15, thereby improving the deflation efficiency of the airbag 220 and shortening the deflation time of the airbag 220.

[0150] Among them, such as Figure 8 and Figure 12 As shown, there can be four vent holes 163, which are arranged around the first boss 131 along the circumference of the first contact portion 13, with adjacent vent holes 163 spaced 90° apart. Of course, the number of vent holes 163 is not limited to four; it can also be two, five, or more, depending on the actual situation.

[0151] In some embodiments, such as Figure 9 and Figure 12 As shown, the first contact portion 13 can be disposed in the central region of the first valve wall 171, and correspondingly, the vent hole 163 is also disposed in the central region of the first valve wall 171.

[0152] The first contact portion 13 in this embodiment is not limited to including the first boss 131 and the annular wall 132. For example, the first contact portion 13 may only include the annular wall 132, which forms a venting cavity 15, with the first vent 211 facing the second contact surface 1321 of the annular wall 132.

[0153] In some embodiments, such as Figure 9 and Figure 13 As shown, Figure 13 for Figure 9 The diagram shows a top view of the second half-valve body 1b. The second contact portion 14 has a third contact surface 141, which includes a second central region 142 and a second peripheral region 143 surrounding the second central region 142. The second central region 142 is the orthographic projection of the second vent 221 onto the third contact surface 141; that is, the second vent 221 is opposite to the second central region 141 of the second contact portion 14.

[0154] like Figure 10 As shown, when the air pressure in the second cavity 12 is greater than the air pressure in the first cavity 11 (that is, when the airbag 220 is inflated), the second diaphragm region 22 separates from the second peripheral region 143 to open the second vent 221, allowing the second cavity 12 to connect with the first cavity 11 through the second vent 221. Figure 11 As shown, when the air pressure in the first cavity 11 is greater than the air pressure in the second cavity 12 (that is, when the airbag 220 deflates), the second diaphragm region 22 comes into contact with the second peripheral region 143 to close the second vent 221, thereby blocking the gas from entering the second cavity 12 from the second vent 221.

[0155] With this configuration, when the airbag 220 is inflated, the second diaphragm area 22 separates from the third contact surface 141 as a whole to open the second vent 221. This simplifies the structure of the diaphragm 2, thereby reducing the design and manufacturing costs. Simultaneously, by positioning the second vent 221 opposite the second central area 142, when the airbag 220 deflates, the second diaphragm area 22 can contact the second peripheral area 143 to seal around the second vent 221. This improves the sealing effect of the second vent 221, preventing gas from entering the second cavity 12 through the second vent 221 and causing a pressure drop in the first cavity 11, which would affect the opening of the deflation chamber 15 by the first diaphragm area 21, thus ensuring the normal deflation of the airbag 220.

[0156] In some embodiments, such as Figure 9 and Figure 13 As shown, the second contact portion 14 can be disposed at the edge of the second valve wall 172, for example, the second contact portion 14 can be disposed at the first edge 1721 of the second valve wall 172 (e.g. Figure 13 (as shown at the right edge of the second valve wall 172).

[0157] In some embodiments, such as Figure 14 As shown, Figure 14 This is a schematic diagram showing a connection between the edge of the diaphragm 2 of the air valve 100 and the valve sidewall 173 in the first embodiment of this application. The second contact portion 14 is a second protrusion disposed in the valve body 1. The second contact portion 14 contacts the second diaphragm region 22 so that the second diaphragm region 22 faces the first side (e.g., ...). Figure 14 (The upper side shown in the image) protrusion.

[0158] With this configuration, when the diaphragm 2 is in its natural state (that is, when the air pressure on the first side and the second side of the diaphragm 2 are balanced), the second contact portion 14 can lift the second diaphragm area 22, making the second diaphragm area 22 taut. In this way, the second diaphragm area 22 can make closer contact with the third contact surface 141 under the action of tension. When the airbag 220 deflates, it can improve the sealing effect on the second vent 221, thereby preventing gas from entering the second cavity 12 from the second vent 221 and causing a decrease in the air pressure of the first cavity 11, which would affect the opening of the first diaphragm area 21 to open the deflation chamber 15, thus ensuring the normal deflation of the airbag 220.

[0159] The method of tightening the second diaphragm region 22 is not unique. In some embodiments, the second diaphragm region 22 can be tightened by adjusting the installation position of the edge of the diaphragm 2 relative to the valve sidewall 173, as shown in the example below. Figure 14 As shown, the valve sidewall 173 includes a first valve sidewall 1731, which is disposed at the first edge 1721 of the second valve wall 172 (e.g., Figure 14 At the right edge shown, the second contact portion 14 is disposed on the second valve wall 172 and located at the first edge 1721; one side edge of the diaphragm 2 (e.g., the right edge shown) Figure 14 The right edge shown is connected to the first position of the first valve sidewall 1731. The height H2 of the first position relative to the second valve wall 172 is less than the height H1 of the second contact portion 14 protruding from the second valve wall 172.

[0160] By setting H2 to be less than H1, the second contact portion 14 can push the second diaphragm region 22 towards the first side of the diaphragm 2, thereby putting the second diaphragm region 22 in a taut state. This configuration eliminates the need for additional components, making the internal structure of the valve body 1 simpler and thus helping to reduce the design and manufacturing costs of the valve body 1.

[0161] In other embodiments, a pressing member may be provided around the second contact portion 14 to tighten the second diaphragm region 22. Specifically, a pressing member is provided on the first side of the diaphragm 2, one end of the pressing member is connected to the first valve wall 171, and the other end of the pressing member extends to the edge of the second contact portion 14 and abuts against the diaphragm 2 to keep the second diaphragm region 22 in a tightened state.

[0162] Figure 15 This is a schematic diagram of the structure of the air valve 100 in the second embodiment of this application. Figure 16 for Figure 15 A partial enlarged view of the air valve 100 shown. Figure 17 for Figure 15 A bottom view of the first structure of the first half-valve body 1a shown in the figure. Figure 18 To and Figure 17The top view of the first half-valve body 1a relative to the second half-valve body 1b shown. Figure 19 for Figure 15 A bottom view of the second structure of the first half-valve body 1a shown in the figure. Figure 20 for Figure 19 The diagram shows the structure of the first half-valve body 1a from another perspective.

[0163] Figures 15-20 The air valve 100 shown is Figures 9-14 The main difference between the air valve 100 shown is that the connection structure between the edge of the diaphragm 2 and the valve body 1 is different. Figures 15-20 In the air valve 100 shown, the edge of the diaphragm 2 extends into the connecting groove 1730 provided on the valve side wall 173, as described below:

[0164] like Figure 15 and Figure 16 As shown, a connecting groove 1730 is provided on the valve sidewall 173, and the edge of the diaphragm 2 extends into the connecting groove 1730 so that the edge of the diaphragm 2 is connected to the valve sidewall 173. The groove depth of the connecting groove 1730 is less than the thickness of the valve sidewall 173, that is, the connecting groove 1730 does not penetrate the valve sidewall 173.

[0165] Among them, such as Figure 16 , Figure 17 and Figure 18 As shown, along the arrangement direction H of the first valve wall 171 and the second valve wall 172, the valve sidewall 173 includes a first flange 173a and a second flange 173b. The first flange 173a and the first valve wall 171 are integrally formed to form the first half valve body 1a; the second flange 173b and the second valve wall 172 are integrally formed to form the second half valve body 1b. The first flange 173a is provided with a positioning step 1731, and the positioning step 1731 and the second flange 173b form a connecting groove 1730.

[0166] When installing the diaphragm 2, the edge of the diaphragm 2 can be placed in the positioning step 1731 of the first half valve body 1a, and then the second flange 173b of the second half valve body 1b is aligned with the first flange 173a of the first half valve body 1a, thereby installing the edge of the diaphragm 2 in the connecting groove 1730.

[0167] To ensure a more secure installation of the diaphragm 2, in some embodiments, such as Figure 15 , Figure 16 and Figure 17 As shown, the connecting groove 1730 can be an annular groove arranged around the first cavity 11. For example, the connecting groove 1730 can be a rectangular annular groove. By setting the connecting groove 1730 as an annular groove, the connection length between the diaphragm 2 and the valve sidewall 173 in the circumferential direction can be increased, thereby allowing the diaphragm 2 to be more firmly connected to the valve sidewall 173.

[0168] The outer contour shape of the first cavity 11 is not unique. In some embodiments, the outer contour shape of the first cavity 11 can be a regular shape, specifically as follows: Figure 17 As shown, the outer contour shape of the first cavity 11 can be a rectangle (or a rectangle with rounded corners), and correspondingly, the outer contour shape of the second cavity 12 is also a rectangle (or a rectangle with rounded corners).

[0169] In other embodiments, the outer contour shape of the first cavity 11 may also be irregular, specifically as follows: Figure 19 and Figure 20 As shown, the first cavity 11 includes a first cavity region 114 and a second cavity region 113 that are connected to each other. The first cavity region 114 is disposed around the first contact portion 13, and the outer contour line 1141 of the first cavity region 114 is an arc. The outer contour line of the second cavity region 113 includes a first straight line 1131, a second straight line 1132, and a third straight line 1133. The first straight line 1131 and the third straight line 1133 are parallel. The second straight line 1132 connects the first straight line 1131 and the third straight line 1133, and the angle between the second straight line 1132 and the first straight line 1131 is an obtuse angle. The first straight line 1131 is connected to one end of the outer contour line 1141, and the third straight line 1133 is connected to the other end of the outer contour line 1141 through a transition arc line 1134. The first vent 161 is located in the second cavity region 113. Correspondingly, the outer contour shape of the second cavity 12 is the same as the outer contour shape of the first cavity 11. This configuration allows the outer contours of the first cavity 11 and the second cavity 12 to resemble the volute shape of a centrifugal fan, which helps to reduce the flow resistance of gas within the first cavity 11 and the second cavity 12.

[0170] Among them, such as Figure 19 As shown, the first vent 161 can be located at the corner of the second cavity region 113 away from the first cavity region 114.

[0171] In some embodiments, such as Figure 19 and Figure 20 As shown, a blind hole 1314 is provided on the first contact surface 1311 of the first contact portion 13, and the blind hole 1314 is opposite to the first vent 211 on the first diaphragm region 21. Of course, in other embodiments, such as Figure 17 As shown, blind holes 1314 may not be required on the first contact surface 1311.

[0172] For details regarding the other structures of the air valve 100 in this embodiment, please refer to [link / reference needed]. Figures 9-14 The structure of the air valve 100 shown is configured as described, and will not be elaborated further here.

[0173] Figure 21 This is a top view of the air valve 100 in the third embodiment of this application. Figure 22 for Figure 21 The shown is a CC cross-sectional view of the air valve 100. Figure 23 for Figure 22 The top view of the second half valve body 1b shown. Figure 24 for Figure 22 A DD cross-sectional view of the air valve 100 shown. Figure 25 for Figure 24 The enlarged view of a portion of diaphragm 2 shown is shown. Figure 26 for Figure 22 The diagram shown illustrates the state of the air valve 100 when the airbag 220 is inflated. Figure 27 for Figure 26 The enlarged view of the air valve 100 shown is a partial view. Figure 28 for Figure 22 The diagram shown illustrates the state of the air valve 100 when the airbag 220 deflates. Figure 29 for Figure 28 The enlarged view of the air valve 100 shown is a partial view. Figure 30 for Figure 22 Another DD cross-sectional view of the air valve 100 shown. Figure 31 for Figure 30 A magnified view of a portion of diaphragm 2 shown.

[0174] Figures 21-31 The air valve 100 shown is Figures 9-14 The main differences between the air valves 100 shown are: the structure of the second diaphragm region 22 of the diaphragm 2 is different, and the location of the second air hole 162 is different. Figures 21-31 In the air valve 100 shown, the second air port 162 includes two sub-ports, one of which communicates with the second cavity 12, and the other sub-port penetrates the third contact surface 141; the second diaphragm region 22 has a tongue 223, which is connected to the edge of the second vent 221 and is used to open and close one of the sub-ports of the second air port 162 located on the third contact surface 141, as specifically described below:

[0175] In some embodiments, such as Figure 21 , Figure 22 as well as Figure 23 As shown, the second vent 162 includes a first sub-hole 1621 and a second sub-hole 1622 disposed on the outer surface of the valve body 1. The first sub-hole 1621 communicates with the second cavity 12, and the second contact portion 14 has a third contact surface 141 (e.g., Figure 23 The area defined by points a, b, c, and d), the second sub-hole 1622 penetrates the third contact surface 141 and is opposite to the second vent 221. Both the first sub-hole 1621 and the second sub-hole 1622 are connected to the air pump 210 through the second air passage 240. Wherein, as Figure 22As shown, the second air passage 240 includes a first sub-air passage 2401 and a second sub-air passage 2402. One end of the first sub-air passage 2401 is connected to the first sub-hole 1621, and the other end of the first sub-air passage 2401 is connected to the air pump 210. One end of the second sub-air passage 2402 is connected to the second sub-hole 1622, and the other end of the second sub-air passage 2402 is connected to the air pump 210.

[0176] like Figure 22 , Figure 24 as well as Figure 25 As shown, the second diaphragm region 22 includes a connecting region 222 and a tongue 223. The connecting region 222 is located around the second vent 221 and is sealed to the third contact surface 141 (e.g., bonded). The tongue 223 has a first connecting end 2231, which is connected to the edge of the second vent 221, allowing the tongue 223 to swing relative to the connecting region 222, thereby allowing the tongue 223 to contact and separate from the third contact surface 141.

[0177] like Figure 26 and Figure 27 As shown, when the second side of diaphragm 2 (e.g.) Figure 26 When the air pressure on the lower side of the diaphragm 2 is greater than the air pressure in the first cavity 11 (that is, when the airbag 220 is inflated), under the action of the air pressure difference, the tongue 223 separates from the third contact surface 141 to open the second sub-hole 1622, so that the second sub-hole 1622 communicates with the first cavity 11 through the second vent 221.

[0178] In this way, a portion of the gas output from the air pump 210 enters the airbag 220 through the second sub-hole 1622, the second vent 221, the first cavity 11, the first air hole 161, and the first air passage 230, thereby inflating the airbag 220. Meanwhile, another portion of the gas output from the air pump 210 enters the second cavity 12 through the first sub-hole 1621, making the air pressure in the second cavity 12 greater than the air pressure in the first cavity 11. Under the action of the air pressure difference, the first diaphragm region 21 comes into contact with the first contact portion 12 to close the vent chamber 15 and the first vent 211, thereby preventing gas from entering the vent chamber 15 from the second cavity 12.

[0179] like Figure 28 and Figure 29 As shown, when the air pressure in the first cavity 11 is greater than that on the second side of the diaphragm 2 (e.g., ...), Figure 27When the air pressure on the lower side of the diaphragm 2 (that is, when the airbag 220 deflates) is low, under the action of the air pressure difference, the tongue 223 contacts the third contact surface 141 to close the second sub-hole 1622, thereby blocking the gas from entering the second sub-hole 1622 through the second vent 221; at the same time, the first diaphragm area 21 separates from the first contact part 13 to open the venting chamber 15 and the first vent 211, and a part of the gas that entered the first cavity 11 enters the venting chamber 15 and is discharged through the vent hole 163; another part of the gas that entered the first cavity 11 enters the air pump 210 through the first vent 211, the second cavity 12, the first sub-hole 1621, and the second air passage 240, and is discharged by the air pump 210.

[0180] In this embodiment, the tongue 223 of the second diaphragm region 22 swings under the pressure difference to open and close the second sub-hole 1622, thereby connecting and disconnecting the second sub-hole 1622 from the first cavity 11. Compared to the entire second diaphragm region 22, the tongue 223 is smaller, so when the airbag 220 deflates, the tongue 223 can quickly close the second sub-hole 1622 under the action of the pressure difference. This can prevent gas from leaking out from the second vent 221 and the second sub-hole 1622, causing a decrease in the air pressure of the first cavity 11, which would affect the opening of the venting chamber 15 of the first diaphragm region 21, thereby ensuring the normal deflation of the airbag 220.

[0181] In order for the tongue 223 to quickly close the second sub-hole 1622 when the airbag 220 deflates, in some embodiments, such as Figure 24 and Figure 25 As shown, the second diaphragm region 22 also includes an elastic element 224, which is connected between the edge of the tongue 223 and the edge of the second vent 221. The elastic element 224 is used to apply an elastic force to the tongue 223, which can cause the tongue 223 to move towards the third contact surface 141. With this configuration, when the airbag 220 deflates, the tongue 223 can close the second sub-hole 1622 more quickly under the combined action of the pressure difference and the elastic force, thereby preventing gas from leaking out of the second sub-hole 1622 and causing a decrease in the air pressure of the first cavity 11, which would affect the opening of the vent chamber 15 in the first diaphragm region 21, thus ensuring the normal deflation of the airbag 220.

[0182] In some embodiments, such as Figure 28 and Figure 29 As shown, when the tongue 223 contacts the third contact surface 141, the tongue 223 is located in the second vent 221, and the elastic element 224 is located in the gap between the edge of the tongue 223 and the edge of the second vent 221. In this way, interference between the elastic element 224 and the tongue 223 can be avoided, so as to prevent the tongue 223 from closing the second sub-hole 1622.

[0183] The composition of elastic element 224 is not unique. Figure 24 and Figure 25 An embodiment of a first structure of the elastic member 224 is shown. In this embodiment, the tongue 223 further has a second connecting end 2232. The first connecting end 2231 and the second connecting end 2232 are the opposite ends of the tongue 223 along a first direction Y. The first direction Y is a direction perpendicular to the thickness direction of the tongue 223. For example, the first direction Y can be the length direction of the tongue 223.

[0184] The elastic element 224 includes a first elastic element 2241, one end of which is connected to the second connecting end 2232, and the other end of which extends away from the first connecting end 2231 and is connected to the edge of the second vent 221.

[0185] By connecting the first elastic element 2241 to the second connecting end 2232 of the tongue 223, the first elastic element 2241 can provide elastic force to the second connecting end 2232 of the tongue 223 to constrain the movement of the second connecting end 2232, thereby preventing large-amplitude shaking during the swing of the tongue 223, thus making the movement of the tongue 223 more stable, and ensuring that the tongue 223 can open and close the second sub-hole 1622 normally.

[0186] Figure 30 and Figure 31 An embodiment of a second structure of the elastic element 224 is shown. In this embodiment, the tongue 223 further has a second connecting end 2232. The first connecting end 2231 and the second connecting end 2232 are the opposite ends of the tongue 223 along the first direction Y. The elastic element 224 includes a first elastic element 2241 and two second elastic elements 2242. One end of the first elastic element 2241 is connected to the second connecting end 2232, and the other end of the first elastic element 2241 extends away from the first connecting end 2231 and is connected to the edge of the second vent 221.

[0187] Along the second direction X, two second elastic members 2242 are distributed on opposite sides of the tongue 223, and each second elastic member 2242 connects the edge of the corresponding side of the tongue 223 to the edge of the second vent 221; wherein the first direction Y, the second direction X and the thickness direction of the tongue 223 are perpendicular to each other, for example, the first direction Y can be the length direction of the tongue 223 and the second direction X can be the width direction of the tongue 223.

[0188] By connecting the first elastic element 2241 to the second connecting end 2232 of the tongue 223, and connecting the corresponding edge of the tongue 223 to the edge of the second vent 221 respectively, the first elastic element 2241 can constrain the movement of the second connecting end 2232, and the second elastic element 2242 can constrain the movement of the side of the tongue 223. This can prevent the tongue 223 from shaking during its swing, thus making the movement of the tongue 223 more stable, and ensuring that the tongue 223 can open and close the second sub-hole 1622 normally.

[0189] In addition to including a first elastic element 2241 and two second elastic elements 2242, the elastic element 224 may also include two second elastic elements 2242 but not the first elastic element 2241.

[0190] The structure of the first elastic element 2241 is not unique; in some embodiments, such as... Figure 25 and Figure 27 As shown, the first elastic element 2241 can be a strip-shaped structure, and along the length direction of the first elastic element 2241, the first elastic element 2241 is in the shape of a broken line. However, it is not limited to this. Along the length direction of the first elastic element 2241, the first elastic element 2241 can also be in the shape of a straight line (that is, the first elastic element 2241 is straight) or in the shape of a wave.

[0191] The structure of the second elastic element 2242 is not unique; in some embodiments, such as... Figure 30 and Figure 31 As shown, the second elastic element 2242 can be a strip structure, and along the length direction of the second elastic element 2242, the second elastic element 2242 is in the shape of a broken line. However, it is not limited to this. Along the length direction of the second elastic element 2242, the second elastic element 2242 can also be in the shape of a straight line (that is, the second elastic element 2242 is straight) or in the shape of a wave.

[0192] In some embodiments, such as Figure 24 and Figure 25 As shown, the tongue 223, elastic element 224, and connecting area 222 are integrated into one structure. This design reduces the number of components in the diaphragm 2, making its structure simpler and facilitating its manufacture and installation.

[0193] The tongue 223 and the elastic element 224 can be formed by a stamping process, that is, by punching away the part around the tongue 223 to form the tongue 223 and the elastic element 224. The part of the second diaphragm area 22 that is punched away by the punch forms the second vent 221.

[0194] Of course, it is not limited to this. The tongue 223, the elastic element 224, and the connecting area 222 can also be set separately and then connected together.

[0195] To ensure more stable movement of the tongue 223 during the inflation and deflation of the airbag 220, in some embodiments, such as Figure 27 As shown, the second diaphragm region 22 also includes a reinforcing sheet (not shown in the figure), which is stacked with the tongue 223. This arrangement increases the rigidity of the tongue 223 by providing a reinforcing sheet on the tongue 223, thereby reducing the deformation of the tongue 223 and ensuring more stable movement of the tongue 223 during the inflation and deflation of the airbag 220.

[0196] The reinforcing sheet can be a metal sheet, such as an aluminum alloy sheet or a steel sheet, or it can be a plastic sheet. The thickness of the reinforcing sheet should be relatively small (e.g., less than 0.1 mm) to reduce its weight and thus reduce the difficulty of opening the tongue 223.

[0197] In some embodiments, such as Figure 27 As shown, the reinforcing piece can be disposed on the side of the tongue 223 away from the third contact surface 141.

[0198] For details regarding the other structures of the air valve 100 in this embodiment, please refer to [link / reference needed]. Figures 9-14 The structure of the air valve 100 shown is configured as described, and will not be elaborated further here.

[0199] Figure 32 This is a partial enlarged view of the air valve 100 at the second contact portion 14 in the fourth embodiment of this application. Figure 32 The air valve 100 shown is Figures 21-31 The main difference between the air valve 100 shown is that the positions of the first air port 161 and the second sub-port 1622 relative to the tongue 223 are different, as described below:

[0200] like Figure 32 As shown, the first air hole 161 is disposed on the first valve wall 171, and the second contact part 14 is disposed on the second valve wall 172. The first air hole 161 and the second sub-hole 1622 are both opposite to the tongue 223. The distance L1 from the first air hole 161 to the first connecting end 2231 is greater than the distance L2 from the second sub-hole 1622 to the first connecting end 2231.

[0201] By setting the distance L1 from the first vent 161 to the first connecting end 2231 to be greater than the distance L2 from the second sub-vent 1622 to the first connecting end 2231, when the airbag 220 deflates, the lever arm of the airflow impact force on the tongue 223 can be made larger, thereby increasing the torque of the airflow impact force. This is beneficial for the tongue 223 to quickly close the second sub-vent 1622, thus preventing gas from leaking out of the second sub-vent 1622 and causing a decrease in the air pressure of the first cavity 11, which would affect the opening of the venting chamber 15 in the first diaphragm area 21, thereby ensuring the normal deflation of the airbag 220.

[0202] Among them, such as Figure 32 As shown, the distance L1 from the first vent 161 to the first connecting end 2231 can be the distance from the hole axis of the first vent 161 to the first connecting end 2231; the distance L2 from the second sub-hole 1622 to the first connecting end 2231 can be the distance from the hole axis of the second sub-hole 1622 to the first connecting end 2231.

[0203] For details regarding the other structures of the air valve 100 in this embodiment, please refer to [link / reference needed]. Figures 21-31 The structure of the air valve 100 shown is configured as described, and will not be elaborated further here.

[0204] Figure 33 This is a partial enlarged view of the air valve 100 at the second contact portion 14 in the fifth embodiment of this application. Figure 33 The air valve 100 shown is Figures 21-31 The main difference between the air valve 100 shown is that the position of the first air hole 161 relative to the tongue 223 is different, as described below:

[0205] like Figure 33 As shown, the valve sidewall 173 includes a first valve sidewall 1731, which is disposed at the first edge 1721 of the second valve wall 172. The second contact portion 14 is disposed on the second valve wall 172 and located at the first edge 1721. The first vent 161 is disposed on the first valve sidewall 1731. When the tongue 223 separates from the third contact surface 141, the orthographic projection of the tongue 223 on the first valve sidewall 1731 overlaps with the first vent 161 at least partially, that is, the tongue 223 is opposite to the first vent 161.

[0206] By placing the first vent 161 on the side wall 1731 of the first valve, and when the tongue 223 separates from the third contact surface 141, the tongue 223 faces the first vent 161. Thus, when the airbag 220 deflates, the airflow acts laterally on the tongue 223, causing the tongue 223 to quickly close the second sub-hole 1622. Simultaneously, placing the first vent 161 on the side wall 1731 of the first valve avoids interference between the first vent 161 and other structures on the first valve wall 171 (such as connectors connected to the vent 163), thereby facilitating the optimized layout of the structure on the valve body 1.

[0207] For details regarding the other structures of the air valve 100 in this embodiment, please refer to [link / reference needed]. Figures 21-31 The structure of the air valve 100 shown is configured as described, and will not be elaborated further here.

[0208] Figure 34 This is a partial enlarged view of the air valve 100 at the second contact portion 14 in the sixth embodiment of this application. Figure 34The main difference between the air valve 100 shown in Figure 32 and the air valve 100 shown in Figure 32 is: Figure 34 The valve 100 has a limiting protrusion 111 added at the position of the tongue 223, as described below:

[0209] like Figure 34 As shown, a limiting protrusion 111 is provided on the cavity wall of the first cavity 11, and a movement space 112 is formed between the limiting protrusion 111 and the third contact surface 141. At least a portion of the tongue 223 extends into the movement space 112. By setting the limiting protrusion 111, when the airbag 220 is inflated, the limiting protrusion 111 can limit the swing amplitude of the tongue 223, thereby preventing the elastic element 224 from being torn by the large swing of the tongue 223 when the air pressure of the second sub-hole 1622 is relatively large.

[0210] Among them, such as Figure 34 As shown, the limiting protrusion 111 can be disposed on the first valve wall 171 and is an integral structure with the first valve wall 171.

[0211] In some embodiments, such as Figure 34 As shown, the limiting protrusion 111 can be set at the edge of the first air hole 161.

[0212] For details regarding the other structures of the air valve 100 in this embodiment, please refer to [link / reference needed]. Figure 32 The structure of the air valve 100 shown is configured as described, and will not be elaborated further here.

[0213] Figure 35 This is a partial enlarged view of the air valve 100 at the second contact portion 14 in the seventh embodiment of this application. Figure 35 The main difference between the air valve 100 shown in Figure 33 and the air valve 100 shown in Figure 33 is: Figure 35 The valve 100 has a limiting protrusion 111 added at the position of the tongue 223, as described below:

[0214] like Figure 35 As shown, a limiting protrusion 111 is provided on the cavity wall of the first cavity 11, and a movement space 112 is formed between the limiting protrusion 111 and the third contact surface 141. At least a portion of the tongue 223 extends into the movement space 112. With this configuration, when the airbag 220 is inflated, the limiting protrusion 111 can limit the swing amplitude of the tongue 223, thereby preventing the elastic element 224 from being torn by the large swing of the tongue 223 when the air pressure of the second sub-hole 1622 is relatively high.

[0215] For details regarding the other structures of the air valve 100 in this embodiment, please refer to [link / reference needed]. Figure 33 The structure of the air valve 100 shown is configured as described, and will not be elaborated further here.

[0216] The types of cross-sectional lines in the accompanying drawings are for distinguishing different components and should not be construed as limiting the materials of the components. The accompanying drawings are for illustrating structural composition and are not shown to scale of the actual product.

[0217] While the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0218] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0219] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0220] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0221] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0222] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gas valve, characterized in that, Includes a valve body (1) and a diaphragm (2) disposed within the valve body (1), the diaphragm (2) having a first side and a second side opposite to each other, the valve body (1) having a first cavity (11) located on the first side and a second cavity (12) located on the second side; The valve body (1) is provided with a first contact portion (13) and a second contact portion (14). The first contact portion (13) is located on the first side and is adjacent to the first cavity (11). The first contact portion (13) forms a venting cavity (15). The venting cavity (15) has an opening (151) on the side near the diaphragm (2). The second contact portion (14) is located on the second side. The outer surface of the valve body (1) is provided with a first air hole (161), a second air hole (162) and a vent hole (163). The first air hole (161) is connected to the first cavity (11), the second air hole (162) is connected to the second cavity (12), and the vent hole (163) is connected to the vent cavity (15). The diaphragm (2) includes a first diaphragm region (21) and a second diaphragm region (22). The first diaphragm region (21) is provided with a first vent (211), and the second diaphragm region (22) is provided with a second vent (221). When the air pressure on the second side of the diaphragm (2) is greater than the air pressure in the first cavity (11), the first diaphragm region (21) contacts the first contact portion (13) to close the cavity opening (151) and the first vent (211), thereby blocking the communication between the second cavity (12) and the venting cavity (15); and the second diaphragm region (22) is at least partially separated from the second contact portion (14), allowing the second vent (162) to communicate with the first cavity (11) through the second vent (221); When the air pressure in the first cavity (11) is greater than the air pressure on the second side of the diaphragm (2), the first diaphragm area (21) separates from the first contact portion (13) to open the cavity opening (151) and the first vent (211), so that the first cavity (11) is connected to the venting cavity (15) and the second cavity (12) respectively; and the second diaphragm area (22) contacts the second contact portion (14) to block the second air hole (162) from communicating with the first cavity (11) through the second vent (221).

2. The air valve according to claim 1, characterized in that, The first contact portion (13) includes a first boss (131) and an annular wall (132) surrounding the first boss (131). An annular groove is provided between the annular wall (132) and the first boss (131), and the annular groove is the venting chamber (15). The first boss (131) has a first contact surface (1311), and the annular wall (132) has a second contact surface (1321). When the air pressure on the second side of the diaphragm (2) is greater than the air pressure in the first cavity (11), the first diaphragm area (21) comes into contact with the first contact surface (1311) and the second contact surface (1321); When the air pressure in the first cavity (11) is greater than the air pressure on the second side of the diaphragm (2), the first diaphragm region (21) separates from the first contact surface (1311) and the second contact surface (1321).

3. The air valve according to claim 2, characterized in that, The first contact surface (1311) includes a first central area (1312) and a first peripheral area (1313) surrounding the first central area (1312). The first central area (1312) is the orthographic projection of the first vent (211) onto the first contact surface (1311).

4. The air valve according to claim 2 or 3, characterized in that, The first contact surface (1311) is flush with the second contact surface (1321), or the first contact surface (1311) protrudes from the second contact surface (1321).

5. The air valve according to any one of claims 2 to 4, characterized in that, The edge of the second contact surface (1321) is provided with rounded corners.

6. The air valve according to any one of claims 1 to 5, characterized in that, The vent hole (163) is located at the position of the first contact portion (13), and there are multiple vent holes (163), which are arranged circumferentially along the first contact portion (13).

7. The air valve according to any one of claims 1 to 6, characterized in that, The second contact portion (14) has a third contact surface (141), the third contact surface (141) includes a second central area (142) and a second peripheral area (143) surrounding the second central area (142), the second central area (142) being the orthographic projection of the second vent (221) onto the third contact surface (141); When the air pressure in the second cavity (12) is greater than the air pressure in the first cavity (11), the second diaphragm area (22) separates from the second peripheral area (143) to open the second vent (221) so that the second cavity (12) is connected to the first cavity (11) through the second vent (221); When the air pressure in the first cavity (11) is greater than the air pressure in the second cavity (12), the second diaphragm region (22) comes into contact with the second peripheral region (143) to close the second vent (221).

8. The air valve according to claim 7, characterized in that, The second contact portion (14) is a second protrusion disposed in the valve body (1). The second contact portion (14) contacts the second diaphragm area (22) so that the second diaphragm area (22) protrudes towards the first side.

9. The air valve according to claim 8, characterized in that, The valve body (1) includes a first valve wall (171), a second valve wall (172), and a valve side wall (173) connecting the first valve wall (171) and the second valve wall (172). The valve side wall (173) includes a first valve side wall (1731), which is disposed at the first edge (1721) of the second valve wall (172). The second contact portion (14) is disposed on the second valve wall (172) and located at the first edge (1721). One edge of the diaphragm (2) is connected to a first position on the first valve sidewall (1731), and the height of the first position relative to the second valve wall (172) is less than the height of the second contact portion (14) protruding from the second valve wall (172).

10. The air valve according to any one of claims 1 to 6, characterized in that, The second vent (162) includes a first sub-hole (1621) and a second sub-hole (1622) disposed on the outer surface of the valve body (1). The first sub-hole (1621) communicates with the second cavity (12). The second contact portion (14) has a third contact surface (141). The second sub-hole (1622) penetrates the third contact surface (141) and is opposite to the second vent (221). The second diaphragm region (22) includes a connecting region (222) and a tongue (223). The connecting region (222) is located around the second vent (221) and is sealed to the third contact surface (141). The tongue (223) has a first connecting end (2231) which is connected to the edge of the second vent (221), so that the tongue (223) can swing relative to the connecting region (222), thereby allowing the tongue (223) to contact and separate from the third contact surface (141). When the air pressure on the second side of the diaphragm (2) is greater than the air pressure in the first cavity (11), the tongue (223) separates from the third contact surface (141) to open the second sub-hole (1622) and allow the second sub-hole (1622) to communicate with the first cavity (11) through the second vent (221); when the air pressure in the first cavity (11) is greater than the air pressure on the second side of the diaphragm (2), the tongue (223) contacts the third contact surface (141) to close the second sub-hole (1622).

11. The air valve according to claim 10, characterized in that, The valve body (1) includes a first valve wall (171), a second valve wall (172), and a valve side wall (173) connected between the first valve wall (171) and the second valve wall (172); the first air hole (161) is disposed on the first valve wall (171), and the second contact portion (14) is disposed on the second valve wall (172); The first air hole (161) and the second sub-hole (1622) are both opposite to the tongue (223). The distance from the first air hole (161) to the first connecting end (2231) is greater than the distance from the second sub-hole (1622) to the first connecting end (2231).

12. The air valve according to claim 10, characterized in that, The valve body (1) includes a first valve wall (171), a second valve wall (172), and a valve side wall (173) connecting the first valve wall (171) and the second valve wall (172). The valve side wall (173) includes a first valve side wall (1731), which is disposed at the first edge (1721) of the second valve wall (172). The second contact portion (14) is disposed on the second valve wall (172) and located at the first edge (1721). The first vent (161) is disposed on the first valve sidewall (1731). When the tongue (223) is separated from the third contact surface (141), the orthographic projection of the tongue (223) on the first valve sidewall (1731) at least partially overlaps with the first vent (161).

13. The air valve according to any one of claims 10 to 12, characterized in that, The second diaphragm region (22) further includes an elastic element (224), which is connected between the edge of the tongue (223) and the edge of the second vent (221). The elastic element (224) is used to apply an elastic force to the tongue (223), which can cause the tongue (223) to move toward the third contact surface (141). When the tongue (223) contacts the third contact surface (141), the tongue (223) is located in the second vent (221), and the elastic element (224) is located in the gap between the edge of the tongue (223) and the second vent (221).

14. The air valve according to claim 13, characterized in that, The tongue (223) also has a second connecting end (2232), the second connecting end (2232) and the first connecting end (2231) being the opposite ends of the tongue (223) along the first direction (Y); The elastic element (224) includes a first elastic element (2241), one end of which is connected to the second connecting end (2232), and the other end of which extends away from the first connecting end (2231) and is connected to the edge of the second vent (221). And / or, the elastic element (224) includes two second elastic elements (2242), which are distributed on opposite sides of the tongue (223) along the second direction (X), and each second elastic element (2242) connects the edge of the corresponding side of the tongue (223) to the edge of the second vent (221); wherein the first direction (Y), the second direction (X) and the thickness direction of the tongue (223) are perpendicular to each other.

15. The air valve according to claim 13 or 14, characterized in that, The first cavity (11) has a limiting protrusion (111) on its cavity wall. The limiting protrusion (111) and the third contact surface (141) form a movement space (112). At least a portion of the tongue (223) extends into the movement space (112).

16. The air valve according to any one of claims 13 to 15, characterized in that, The tongue (223), the elastic element (224), and the connecting area (222) are an integral structure.

17. The air valve according to any one of claims 10 to 16, characterized in that, The second diaphragm region (22) also includes a reinforcing sheet (225), which is stacked with the tongue sheet (223).

18. A gas path system, characterized in that, It includes an air pump (210), an airbag (220), and an air valve (100) according to any one of claims 1 to 17; The airbag (220) is connected to the first air hole (161) of the air valve (100) through the first air passage (230); The air pump (210) is connected to the second air hole (162) of the air valve (100) through the second air passage (240), and the air pump (210) can release the gas flowing into the air pump (210) from the second air passage (240).

19. A wearable device, characterized in that, The device includes a housing (400), a strap (500), and an air system (300) as described in claim 18, wherein the air pump (210) and air valve (100) of the air system (300) are disposed in the housing (400), the strap (500) is connected to the housing (400), and the airbag (220) of the air system (300) is disposed in the strap (500).

20. A blood pressure measuring device, characterized in that, It includes a housing (400), a strap (500), and an air system (300) as described in claim 18, wherein the air pump (210) and air valve (100) of the air system (300) are disposed in the housing (400), and the airbag (220) of the air system (300) is disposed in the strap (500).

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