Air nozzle, air bag assembly and wearable device

Abstract

The application provides an air nozzle, an air bag assembly and a wearable device. The air nozzle comprises: an elastic body and a rigid body; the elastic body has a gas-permeable hole and comprises: a main body part, and a connecting part arranged on one side of the main body part and extending away from the main body part, the gas-permeable hole penetrating through the main body part and the connecting part in the extending direction of the connecting part, and the connecting part is further configured to be connected with an external device to make the gas-permeable hole communicate with the external device; the rigid body is connected with the side of the main body part where the connecting part is arranged and surrounds the connecting part, and when the connecting part is connected with the external device, the rigid body is configured to be connected with the external device to fix the connecting part on the external device. Through the above arrangement, the air nozzle can be directly connected with the external device by using the rigid body to fix the connecting part on the external device, thereby omitting the limiting structure required for fixing the elastic body on the external device.

Description

Technical Field

[0001] This application relates to the technical field of wearable devices, specifically to an air nozzle, an airbag assembly, and a wearable device. Background Technology

[0002] Currently, common blood pressure measurement solutions in smartwatches involve placing an air bladder on the watch band and inflating it through the watch head. This inflates the bladder to compress and block the user's blood vessels for blood pressure measurement. The air bladder is typically connected to the watch head via a flexible nozzle. Because the nozzle's elasticity doesn't provide a secure connection, the watch head often includes a retaining structure to hold the nozzle in place, such as a cover plate to press the nozzle firmly against the watch head and improve the connection. However, this retaining structure takes up additional space in the watch head, limiting its design and the layout of internal components. Summary of the Invention

[0003] This application provides an air nozzle, comprising: an elastomer and a rigid body; the elastomer has a vent hole and includes: a main body portion and a connecting portion disposed on one side of the main body portion and extending in a direction away from the main body portion; the vent hole penetrates the main body portion and the connecting portion in the extending direction of the connecting portion, and the connecting portion is further configured to connect to an external device so that the vent hole communicates with the external device; the rigid body is connected to the side of the main body portion where the connecting portion is disposed and is disposed around the connecting portion, and when the connecting portion is connected to the external device, the rigid body is configured to connect to the external device to fix the connecting portion to the external device.

[0004] In another aspect, this application provides an airbag assembly, the airbag assembly comprising: an airbag having a cavity and the aforementioned air nozzle; the main body portion is connected to the airbag on the side opposite to the rigid body, and the vent hole is also connected to the cavity.

[0005] This application also provides a wearable device, the wearable device comprising: a watch head assembly and the aforementioned airbag assembly; wherein, the watch head assembly has a receiving hole, the connecting portion is inserted into the receiving hole so that the vent communicates the cavity and the receiving hole, and the watch head assembly is configured to inflate and deflate the cavity through the receiving hole and the vent; the rigid body is connected to the side of the watch head assembly with the receiving hole to fix the connecting portion in the receiving hole.

[0006] The air nozzle provided in this application features a rigid body on the main body of an elastomer. When the connecting part of the elastomer is connected to an external device, the rigid body can also connect to the external device and fix the connecting part thereto. This allows the rigid body to act as a reinforcement, ensuring a stable connection between the air nozzle and the external device (such as a meter). With this design, the air nozzle can be directly connected and fixed to the external device using the rigid body, eliminating the need for a limiting structure on the external device to fix the air nozzle. This avoids the limitations imposed by limiting structures on the design of the external device and the layout of internal components. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a partial structural schematic diagram of the wearable device 10 provided in the embodiments of this application;

[0009] Figure 2 yes Figure 1 A schematic diagram of a partial cross-sectional structure of the wearable device 10 along line V-V;

[0010] Figure 3 yes Figure 1 Schematic diagram of the structure of the central airbag assembly 200;

[0011] Figure 4 yes Figure 3 Schematic diagram of the structure of the 220 central air nozzle;

[0012] Figure 5 yes Figure 2 Schematic diagram of the structure of the intermediate elastomer 221;

[0013] Figure 6 yes Figure 4 Schematic diagram of the structure of the medium rigid body 222;

[0014] Figure 7 yes Figure 6 A structural schematic diagram of the medium-rigid body 222 from another perspective;

[0015] Figure 8 yes Figure 4 A schematic diagram of the cross-sectional structure of the 220 central air nozzle along line VI-VI. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0017] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0018] Please see Figures 1 to 2 , Figure 1 This is a partial structural schematic diagram of the wearable device 10 provided in an embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the wearable device 10 along line V-V.

[0019] The wearable device 10 provided in this application can be a smartwatch, a smart bracelet, or a cuff-type blood pressure measuring device, etc. The following example uses a smartwatch as the wearable device 10. Figure 1 As shown, the wearable device 10 includes a meter assembly 100 and an airbag assembly 200. The meter assembly 100 is connected to the airbag assembly 200 and can inflate and deflate the airbag assembly 200, allowing it to expand or contract under the control of the meter assembly 100 to cooperate with the meter assembly 100 in measuring the user's blood pressure. In this embodiment, the airbag assembly 200 can be directly and fixedly connected to the meter assembly 100, eliminating the need for a limiting structure on the meter assembly 100 to fix the airbag assembly 200. This avoids the limitations imposed by the limiting structure on the design and internal component layout of the meter assembly 100.

[0020] The meter assembly 100 is used to inflate and deflate the airbag assembly 200, and can be used in conjunction with the airbag assembly 200 to measure the user's blood pressure. Figure 2As shown, the meter assembly 100 may include a housing 110 and an air pump 120. The housing 110 may have a receiving space for mounting the air pump 120 and other functional components required by the wearable device 10, such as a pressure sensor, battery, microphone, and speaker. Simultaneously, the outer surface of the housing 110 opposite to the receiving space can be connected to the airbag assembly 200 and has a receiving hole 101 for accommodating the airbag assembly 200. The air pump 120 can also communicate with the receiving hole 101, allowing the air pump 120 to inflate and deflate the airbag assembly 200 through the receiving hole 101. In this embodiment, the airbag assembly 200 can be inserted into the receiving hole 101 and connected to the outer surface of the housing 110 opposite to the receiving space to fix the airbag assembly 200 within the receiving hole 101, thereby maintaining the communication between the airbag assembly 200 and the air pump 120. With this configuration, the limiting structure required for fixing the airbag assembly 200 on the housing 110 can be omitted from the meter assembly 100, thereby avoiding the limitation that the limiting structure may impose on the shape design and internal component layout of the meter assembly 100.

[0021] Optionally, in addition to having a receiving hole 101 for inserting the airbag assembly 200, the outer surface of the housing 110 may also be provided with a conduit communicating with the air pump 120. This conduit can be inserted into the airbag assembly 200 to connect the air pump 120 and the airbag assembly 200. Of course, when the conduit is inserted into the airbag assembly 200, the airbag assembly 200 can also be connected to the outer surface of the housing 110 to fix the conduit inside the airbag assembly 200, thereby maintaining the communication between the airbag assembly 200 and the air pump 120. Of course, besides the two embodiments described above, the housing 110 and the airbag assembly 200 can also be connected in other ways, as long as the air pump 120 can communicate with the airbag assembly 200 and the airbag assembly 200 can be fixed to the housing 110. This embodiment does not specify this aspect.

[0022] Optionally, to facilitate wearing the wearable device 10, the wearable device 10 may further include a watchband assembly 300. For example... Figure 1 As shown, the watch strap assembly 300 can be connected to the housing 110 and together with the watch head assembly 100, forms a wearing space 101 for the user to wear. Simultaneously, the airbag assembly 200 can be located on the side of the watch strap assembly 300 facing the wearing space 101, so that the airbag assembly 200, after inflating, can compress the user's wrist to achieve the blood pressure measurement function. In this embodiment, the watch strap assembly 300 is preferably detachably connected to the housing 110. Of course, the watch strap assembly 300 can also be non-detachably connected to the housing 110; this embodiment does not limit this aspect.

[0023] Please combine Figure 2 See Figures 3 to 4 , Figure 3 yes Figure 1 A schematic diagram of the structure of the central airbag assembly 200. Figure 4 yes Figure 3 A schematic diagram of the structure of the 220 air nozzle.

[0024] The airbag assembly 200 is connected to the housing 110 and communicates with the air pump 120, and the airbag assembly 200 can also inflate or contract under the control of the air pump 120. Figures 2 to 3 As shown, the airbag assembly 200 may include an airbag 210 and an air nozzle 220. The airbag 210 may have a cavity 201, which can accommodate gas from the air pump 120, allowing the airbag 210 to inflate or contract under the control of the air pump 120. The air nozzle 220 is located at the end of the airbag 210 and communicates with the cavity 201. The air nozzle 220 is also connected to the air pump 120, allowing the air pump 120 to inflate the cavity 201 through the air nozzle 220. Furthermore, after communicating with the air pump 120, the air nozzle 220 can be fixed to the housing 110 to maintain the communication between the air nozzle 220 and the air pump 120. With this configuration, the meter assembly 100 can omit the limiting structure required for fixing the airbag assembly 200 on the housing 110, thereby avoiding the limitations imposed by the limiting structure on the design and internal component layout of the meter assembly 100.

[0025] For example, the airbag 210 may include a first sheet layer 211 and a second sheet layer 212. Figure 2 As shown, the first sheet layer 211 and the second sheet layer 212 can be stacked and together form the aforementioned cavity 201. A notch 202 communicating with the cavity 201 is also provided on the side of the first sheet layer 211 opposite to the second sheet layer 212, allowing communication between the air nozzle 220 and the cavity 201. The first sheet layer 211 and the second sheet layer 212 can be made of elastic material and can undergo elastic deformation after the cavity 201 is inflated, thereby increasing the expansion stroke of the airbag 210. Simultaneously, the first sheet layer 211 and the second sheet layer 212 can also have folded redundant areas, which can be expanded after inflation within the cavity 201 to further increase the expansion stroke of the airbag 210. Furthermore, the first sheet layer 211 and the second sheet layer 212 can be made of TPU (Thermoplastic Urethane) material, and the edges of the first sheet layer 211 and the second sheet layer 212 can be connected by high-frequency hot pressing, so that the first sheet layer 211 and the second sheet layer 212 can jointly form a cavity 201.

[0026] Optionally, the aforementioned structure of the airbag 210 is only one of the optional embodiments. In other embodiments, the specific structure of the airbag 210 may not be limited to this. For example, the airbag 210 may also include more than two layers of sheet material to form two or more cavities 201. That is, the structure of the airbag 210 can be adjusted according to design requirements, as long as the cavities 201 of the airbag 210 can communicate with the air nozzle 220. This embodiment does not limit this.

[0027] For example, the air nozzle 220 may include an elastomer 221 and a rigid body 222. For example... Figure 2 and Figure 4 As shown, the elastomer 221 is disposed on the side of the first sheet layer 211 away from the second sheet layer 212, and the elastomer 221 is also disposed around the notch 202, and surrounds a vent hole 2201 that communicates with the notch 202. At the same time, the vent hole 2201 penetrates the opposite sides of the elastomer 221 near and away from the first sheet layer 211, and the end of the elastomer 221 away from the first sheet layer 211 is also used to insert into the receiving hole 101, so that the air pump 120 can inflate the cavity 201 through the receiving hole 101, the vent hole 2201 and the notch 202. The rigid body 222 can be sleeved on the periphery of the elastic body 221 opposite to the vent hole 2201, and located on the side of the elastic body 221 opposite to the first sheet layer 211. The rigid body 222 is used to connect with the outer surface of the housing 110 after the elastic body 221 is inserted into the receiving hole 101, and to fix the elastic body 221 in the receiving hole 101 to maintain the communication between the air pump 120 and the cavity 201. In this embodiment, the material of the elastic body 221 can be thermoplastic polyurethane, while the material of the rigid body 222 can be metal or rigid plastic. When the material of the rigid body 222 is metal, the elastic body 221 and the rigid body 222 can be integrally manufactured by in-mold injection molding.

[0028] With the above configuration, the rigid body 222 can be used to reinforce the elastic body 221, allowing the connection between the air nozzle 220 and the housing 110 to be unrestricted by the elastic body 221. This enables the rigid body 222 to be directly connected to the housing 110, eliminating the need for a limiting structure on the housing 110 to fix the elastic body 221. This not only avoids the limitations imposed by the limiting structure on the design of the meter assembly 100 and the layout of its internal components, but also saves on the production and assembly costs of the wearable device 10.

[0029] Optionally, in addition to being used with the meter assembly 100, the air nozzle 220 can also be used with other external devices or structures that require it. The following description only uses the use of the air nozzle 220 with the meter assembly 100 as an example.

[0030] Please combine Figure 2 See Figures 5 to 8 , Figure 5 yes Figure 4 Schematic diagram of the structure of the medium elastomer 221 Figure 6 yes Figure 4 Schematic diagram of the structure of the rigid body 222. Figure 7 yes Figure 6 A structural schematic diagram of the medium-rigid body 222 from another perspective. Figure 8 yes Figure 4 A schematic diagram of the cross-sectional structure of the 220 central air nozzle along line VI-VI.

[0031] The elastomer 221 is connected to the first sheet layer 211 and is used to insert into the receiving hole 101 so that the vent hole 2201 is connected to the air pump 120. Figure 2 and Figure 5 As shown, the elastomer 221 includes a main body 2211 and a connecting portion 2212. The main body 2211 is located on the side of the first sheet layer 211 facing away from the second sheet layer 212, covering the notch 202, and is also connected to the rigid body 222 on the side of the main body 2211 facing away from the second sheet layer 212. The connecting portion 2212 is located on the side of the main body 2211 facing away from the second sheet layer 212 and extends in a direction away from the main body 2211. The end of the connecting portion 2212 away from the main body 2211 is used to insert into the receiving hole 101. Simultaneously, a vent 2201 penetrates the main body 2211 and the connecting portion 2212 in the extending direction of the connecting portion 2212, so as to connect the notch 202 and the receiving hole 101 after the connecting portion 2212 is inserted into the receiving hole 101. In this embodiment, the main body 2211 and the first sheet layer 211 can also be connected by high-frequency hot pressing.

[0032] Optionally, to improve the connection strength between the main body 2211 and the rigid body 222, the main body 2211 is further provided with fixing posts 22111 inserted into the rigid body 222. The fixing posts 22111 are located on the side of the main body 2211 away from the first sheet layer 211, and the ends of the fixing posts 22111 away from the main body 2211 can also engage with the rigid body 222 to limit the displacement of the main body 2211 in the direction away from the main body 2211, thereby improving the connection strength between the main body 2211 and the rigid body 222. Furthermore, there can be multiple fixing posts 22111, which can be spaced apart on the main body 2211 and arranged around the connecting portion 2212. For example, there can be four fixing posts 22111, which can be distributed in the four positive directions of the connecting portion 2212. In this embodiment, the fixing post 22111 can be cylindrical, and the diameter of the end of the fixing post 22111 away from the main body 2211 can be larger than the diameter of the rest of the fixing post 22111, so that the end of the fixing post 22111 away from the main body 2211 can be engaged with the rigid body 222.

[0033] Optionally, the connecting part 2212 can be inserted into the receiving hole 101 or the housing 110. For example, when the housing 110 is provided with the aforementioned conduit, the end of the conduit away from the housing 110 can be inserted into the vent hole 2201 and press-fitted with the connecting part 2212. With this configuration, the vent hole 2201 can still communicate with the receiving hole 101, allowing the air pump 120 to inflate the cavity 201. Furthermore, when the conduit is inserted into the vent hole 2201, the rigid body 222 can also be connected to the outer surface of the housing 110 where the conduit is located to fix the conduit within the vent hole 2201.

[0034] Optionally, a first annular groove 2202 may be formed on the periphery of the connecting portion 2212 away from the vent hole 2201, and the area of ​​the rigid body 222 near the connecting portion 2212 may be located within the first annular groove 2202, so as to limit the rigid body 222 by utilizing the sidewall of the first annular groove 2202, thereby further improving the connection strength between the rigid body 222 and the elastic body 221. At the same time, since the rigid body 222 is located on the side of the main body portion 2211 away from the first sheet layer 211, the first annular groove 2202 may also penetrate the side of the connecting portion 2212 facing the main body portion 2211, so as to accommodate the rigid body 222.

[0035] Optionally, the end of the connecting portion 2212 away from the main body 2211 may also have a second annular groove 2203 on its periphery opposite to the vent hole 2201, and the second annular groove 2203 can be used to install the sealing ring 223. The sealing ring 223 can be disposed within the second annular groove 2203 and surround the connecting portion 2212, and the sealing ring 223 also protrudes from the periphery of the connecting portion 2212 opposite to the vent hole 2201. When the connecting portion 2212 is inserted into the receiving hole 101, the sealing ring 223 can abut against the side wall of the receiving hole 101 and the bottom wall of the second annular groove 2203 respectively, to fill the gap between the connecting portion 2212 and the side wall of the receiving hole 101, thereby improving the sealing performance at the connecting portion 2212. In this embodiment, the sealing ring 223 can be made of materials such as silicone, rubber, or soft plastic.

[0036] like Figure 2 and Figures 5 to 6 As shown, the rigid body 222 is connected to the side of the main body 2211 away from the first sheet layer 211, that is, to the side of the main body 2211 where the connecting portion 2212 is provided, and is arranged around the connecting portion 2212. When the end of the connecting portion 2212 away from the main body 2211 is inserted into the receiving hole 101, the rigid body 222 can be connected to the outer surface of the housing 110 to fix the connecting portion 2212 within the receiving hole 101. For example, an adhesive layer 224 is provided between the rigid body 222 and the outer surface of the housing 110, and this adhesive layer 224 can bond and fix the rigid body 222 to the housing 110, thereby maintaining the communication between the vent 2201 and the receiving hole 101. In this embodiment, the adhesive layer 224 can specifically be formed by applying hot melt adhesive or thermosetting adhesive to the side of the rigid body 222 away from the main body 2211.

[0037] With the above configuration, the air nozzle 220 can not only be reinforced by the rigid body 222, but also be directly bonded to the outer surface of the housing 110 by applying adhesive to the rigid body 222, without being limited by the elastomer 221 (TPU material does not have adhesive properties with hot melt adhesive or thermosetting adhesive, and cannot be fixed by adhesive). Thus, the meter assembly 100 can omit the limiting structure required for fixing the elastomer 221 on the housing 110, avoiding the limitations imposed by the limiting structure on the shape design and internal component layout of the meter assembly 100, and saving on the production and assembly costs of the meter assembly 100.

[0038] Alternatively, besides bonding the rigid body 222 and the housing 110, other methods, such as detachable or non-detachable methods, can also be used to connect the rigid body 222 and the housing 110. For example, the rigid body 222 can be fixedly connected to the outer surface of the housing 110 by a snap-fit ​​method. Alternatively, the rigid body 222 can be magnetically connected to the housing 110, making the rigid body 222 and the housing 110 detachable. This only requires the rigid body 222 to connect to the housing 110 after the connecting part 2212 is inserted into the receiving hole 101, thus fixing the connecting part 2212. This embodiment does not limit this approach.

[0039] Optionally, in order to cooperate with the fixing post 22111 in the aforementioned embodiment, the rigid body 222 may also have a fixing hole 2221 for inserting the fixing post 22111. For example... Figure 5 and Figure 6 As shown, the fixing hole 2221 can penetrate the rigid body 222 on opposite sides near and away from the main body 2211. The opening diameter of the fixing hole 2221 in the portion away from the main body 2211 is larger than the opening diameter in the portion near the main body 2211, to match the shape of the fixing post 22111. This allows the fixing post 22111 to engage with the inner wall of the fixing hole 2221, improving the connection strength between the main body 2211 and the rigid body 222. In this embodiment, the number of fixing holes 2221 can also be four, to respectively mate with four fixing posts 22111.

[0040] Optionally, the positions of the fixing post 22111 and the fixing hole 2221 can also be interchanged. That is, the fixing post 22111 can also be part of the rigid body 222, while the main body 2211 has a fixing hole 2221, and the fixing post 22111 can still be inserted into the fixing hole 2221 and cooperate with the fixing hole 2221 to improve the connection between the main body 2211 and the rigid body 222.

[0041] Optionally, the main body 2211 may also have a blind hole 2204 on the side facing the rigid body 222, and the rigid body 222 may also have a protrusion 2222 located within the blind hole 2204 and matching the shape of the blind hole 2204. Figure 5 and Figure 7 As shown, the protrusion 2222 can occupy the blind hole 2204 to increase the contact area between the main body 2211 and the rigid body 222, thereby improving the bonding strength between the main body 2211 and the rigid body 222 when integrally manufactured by in-mold injection molding. Of course, similar to the fixing post 22111 and the fixing hole 2221, the positions of the blind hole 2204 and the protrusion 2222 can also be interchanged, and this embodiment does not limit this.

[0042] Optionally, to further improve the connection strength between the elastic body 221 and the rigid body 222, the bottom wall of the first annular groove 2202 is also provided with a positioning part 22121, and a dovetail groove 2223 is provided in the area of ​​the rigid body 222 located in the first annular groove 2202. Figure 8 As shown, the positioning part 22121 is located inside the dovetail groove 2223, and the shape of the positioning part 22121 matches the shape of the dovetail groove 2223. It can cooperate with the inner wall of the dovetail groove 2223 to limit the rigid body 222 in the direction away from the vent hole 2201 of the connecting part 2212, so as to improve the connection between the rigid body 222 and the connecting part 2212.

[0043] Optionally, the positions of the positioning part 22121 and the dovetail groove 2223 can be interchanged. That is, the bottom wall of the first annular groove 2202 can be provided with a dovetail groove 2223, and the positioning part 22121 is provided on the side of the rigid body 222 facing the bottom wall of the first annular groove 2202. With this arrangement, the positioning part 22121 and the dovetail groove 2223 can still limit the position of the rigid body 222.

[0044] The air nozzle 220 provided in this application features a rigid body 222 on the main body 2211 of the elastic body 221. When the connecting portion 2212 of the elastic body 221 is connected to an external device, the rigid body 222 can also be connected to the external device, fixing the connecting portion 2212 to the external device. This allows the rigid body 222 to act as a reinforcement, ensuring a stable connection between the air nozzle 220 and the external device (such as a meter). With this configuration, the air nozzle 220 can be directly connected and fixed to the external device using the rigid body 222, eliminating the need for a limiting structure on the external device to fix the air nozzle 220. This avoids the limitations imposed by the limiting structure on the external device's design and the layout of internal components.

[0045] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. An air valve, characterized in that, The air nozzle includes: an elastomer and a rigid body; The elastomer has a vent hole and includes: a main body portion and a connecting portion disposed on one side of the main body portion and extending in a direction away from the main body portion. The vent hole penetrates the main body portion and the connecting portion in the extending direction of the connecting portion, and the connecting portion is further configured to connect to an external device so that the vent hole is connected to the external device. The rigid body is connected to the side of the main body where the connecting portion is provided, and is arranged around the connecting portion. When the connecting portion is connected to the external device, the rigid body is configured to connect to the external device to fix the connecting portion to the external device.

2. The air nozzle according to claim 1, characterized in that, One of the main body and the rigid body is provided with a fixing post inserted into the other, and the fixing post is configured to improve the connection strength between the main body and the rigid body.

3. The air nozzle according to claim 1, characterized in that, The connecting portion also has a first annular groove on its periphery opposite to the vent hole; wherein, The area of ​​the rigid body near the connecting portion is also located within the first annular groove, and the sidewall of the first annular groove limits the rigid body in the extending direction.

4. The air nozzle according to claim 3, characterized in that, One of the bottom wall of the first annular groove and the rigid body is further provided with a dovetail groove, and the other is further provided with a positioning part that matches the dovetail groove, and the positioning part is located in the dovetail groove to limit the rigid body in the direction of the connecting part away from the vent hole.

5. The air nozzle according to claim 1, characterized in that, The end of the connecting portion away from the main body is configured for inserting the external device, so that the vent is connected to the external device; wherein... The end of the connecting portion away from the main body is provided with a second annular groove on the circumferential side opposite to the vent hole, to accommodate a sealing ring located between the connecting portion and the external device.

6. The air nozzle according to claim 1, characterized in that, The main body, the connecting part, and the rigid body are integrally manufactured using in-mold injection molding.

7. The air nozzle according to claim 1, characterized in that, The rigid body is made of metal or hard plastic, and the elastic body is made of thermoplastic polyurethane.

8. An airbag assembly, characterized in that, The airbag assembly includes: an airbag having a cavity and an air nozzle as described in any one of claims 1-7; The main body is connected to the airbag on the side opposite to the rigid body, and the vent is also connected to the cavity.

9. A wearable device, characterized in that, The wearable device includes: a head assembly and the airbag assembly as described in claim 8; wherein... The meter assembly has a receiving hole, and the connecting part is inserted into the receiving hole so that the vent connects the cavity and the receiving hole. The meter assembly is configured to inflate and deflate the cavity through the receiving hole and the vent. The rigid body is connected to the side of the meter assembly with the receiving hole to fix the connecting part in the receiving hole.

10. The wearable device according to claim 9, characterized in that, An adhesive layer is provided between the rigid body and the meter assembly to bond the rigid body and the meter assembly.

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