Airbag device
By introducing blocking and heat insulation components into the airbag device, the problem of high-temperature gas impacting the airbag assembly part is solved, the reliability of the airbag device is improved, and the connection stability between the airbag and the base is ensured.
Patent Information
- Application Number
- CN202521859017.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-29
AI Technical Summary
In existing airbag devices, the high-temperature and high-pressure gas discharged from the gas generator may directly impact the connection between the airbag and the base, causing the assembly part to melt, soften, or burn, which in turn causes the airbag to detach from the base, lose its protective function, and affect reliability.
A blocking component is introduced into the airbag device and placed between the gas generator and the airbag assembly to prevent high-temperature gas from impacting the airbag assembly. This is combined with a heat insulation component and a retaining component to improve the reliability of the connection.
It effectively blocks the impact of high-temperature gas on the airbag assembly, reduces the risk of airbag and base connection failure, ensures that the airbag can expand and deploy normally for protection, and improves the reliability of the airbag device.
Smart Images
Figure CN224676052U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of safety technology, and more specifically, to a blocking element for an airbag device for a vehicle and an airbag device including the blocking element. Background Technology
[0002] In related technologies, airbag devices include a base, an airbag, and a gas generator. The airbag opening and the gas generator are both fixed to the mounting port of the base. The airbag opening covers the outside of the gas generator, and the portion of the gas generator with its exhaust port is located inside the airbag. In an emergency (such as a collision), the gas generator releases gas, inflating the airbag to protect the person. Typically, the gas released by the gas generator is a high-temperature, high-pressure gas. Since the airbag and base are made of polymer materials, this high-temperature, high-pressure gas may directly blow onto the mounting portion connecting the airbag and the base, causing it to rupture or be burned. The part of the base connecting to the airbag is also at risk of being burned. The mounting portion of the airbag, also known as the base, is used for fixed connection to the base. When the mounting portion and / or the base are burned, the airbag may detach from the base, losing its protective function. The risk of burning the mounting portion of the airbag and the part of the base connecting to the airbag is further increased, especially when the exhaust port of the gas generator is close to the airbag opening. Therefore, it is evident that the reliability of airbag devices in related technologies still needs to be improved. Utility Model Content
[0003] The purpose of this application is to provide an airbag device with better reliability.
[0004] The embodiments of this application can be implemented as follows: This application provides an airbag device, including a base, a gas generator, an air bag, and a blocking member; the base has an assembly port, the air bag has an assembly portion forming an opening, both the assembly port and the opening are sleeved on the outside of the gas generator, the assembly portion of the air bag is connected to the base, the gas generator has an exhaust port, the exhaust port is located inside the air bag; the blocking member is disposed between the assembly portion and the gas generator, and the blocking member is used to prevent the gas discharged from the exhaust port from impacting the assembly portion.
[0005] In an optional embodiment, the airbag device further includes a retainer sleeved on the outside of the gas generator, the retainer and the base together clamping the assembly portion of the airbag.
[0006] In an alternative embodiment, the blocking member is connected to the retaining member.
[0007] In an optional embodiment, the outer peripheral surface of the gas generator is provided with a flange, the base includes a support portion, an assembly port is opened in the support portion, and the gas generator is connected to the support portion through the flange.
[0008] In an optional embodiment, the airbag device further includes a heat insulation component, which includes a heat insulation part, an assembly part, a support part, a heat insulation part, and a flange stacked sequentially in the axial direction of the assembly port.
[0009] In an optional embodiment, the blocking member is disposed in the heat insulation part.
[0010] In an optional embodiment, a blocking member is provided on the support portion.
[0011] In an alternative embodiment, the blocking element is disposed on the flange.
[0012] In an optional embodiment, the gas generator has an outer peripheral surface surrounding the central axis of the assembly port, and an exhaust port is opened on the outer peripheral surface of the gas generator.
[0013] In an optional embodiment, the projection of the blocking member on the outer peripheral surface does not cover the exhaust port, and along the axial direction of the assembly port, the projection of the blocking member is relative to the outer side of the exhaust port near the opening of the air bag; wherein the projection direction of the blocking member's projection is radial to the assembly port.
[0014] In an optional embodiment, the blocking member has an inner surface facing the gas generator; Along the axial direction of the assembly port from the outside to the inside of the air bag, the distance between the inner side and the central axis of the assembly port gradually increases or decreases, or the inner side is parallel to the central axis of the assembly port.
[0015] In an optional embodiment, the blocking element is a ring-shaped structure surrounding the gas generator; Alternatively, the blocking component includes a plurality of blocking portions arranged at intervals around the gas generator, the blocking portions being used to block the gas discharged from the exhaust port from impacting the assembly portion of the gas bag. Alternatively, the airbag device may include multiple blocking elements arranged at intervals around the gas generator.
[0016] In an optional embodiment, the assembly part of the gas bag is connected to the base by a plurality of fasteners, which are arranged circumferentially around the gas generator. The blocking element includes a plurality of blocking portions arranged at intervals around the gas generator, with each blocking portion corresponding to the fastener and the gas generator; or, the airbag device includes a plurality of blocking elements arranged at intervals around the gas generator, with each blocking element corresponding to the fastener and the gas generator.
[0017] The beneficial effects of the airbag device provided in this application embodiment include: The airbag device provided in this application includes a base, a gas generator, an air bag, and a blocking member. The base has an assembly port, and the air bag has an assembly portion forming an opening. Both the assembly port and the opening are fitted onto the outside of the gas generator. The assembly portion of the air bag is connected to the base. The gas generator has an exhaust port located inside the air bag. The blocking member is disposed between the assembly portion and the gas generator, and is used to prevent the gas discharged from the exhaust port from impacting the assembly portion. In this application embodiment, by adding the blocking member, the high-temperature gas ejected from the gas generator can be blocked, preventing direct impact of the high-temperature gas on the assembly portion of the air bag. Therefore, the blocking member can reduce the risk of the air bag's assembly portion and the part of the base connecting to the air bag melting, softening, or burning due to high-temperature gas, thereby reducing the risk of connection failure between the air bag and the base; thus, it can ensure that the air bag can inflate and deploy to perform its protective function. Therefore, the airbag device provided in this application embodiment has better reliability. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a partial cross-sectional view of an airbag device in related technologies; Figure 2 This is an exploded view of an airbag device in one embodiment of this application; Figure 3 This is a schematic diagram of an airbag device in one embodiment of this application (the airbag and blocking component are omitted). Figure 4 This is a cross-sectional view of an airbag device in one embodiment of this application; Figure 5 This is a partial cross-sectional view of an airbag device in one embodiment of this application; Figure 6 This is a schematic diagram of the installation of the blocking member in one embodiment of this application; Figure 7 This is a partial schematic diagram of the airbag device in one embodiment of this application; Figure 8 This is a schematic diagram of a blocking element disposed on a flange in one embodiment of this application; Figure 9 This is a cross-sectional view of the airbag device when the blocking member is disposed on the flange in one embodiment of this application; Figure 10 This is a schematic diagram of a blocking member disposed on a heat insulation member in one embodiment of this application; Figure 11 This is a cross-sectional view of the airbag device in one embodiment of this application, where the blocking member is disposed on the heat insulation member; Figure 12 This is a schematic diagram of a blocking member disposed on a base in one embodiment of this application; Figure 13 This is a cross-sectional view of the airbag device in one embodiment of this application when the blocking member is disposed on the base; Figure 14 This is a schematic diagram of a blocking member disposed on a retaining member in one embodiment of this application; Figure 15 This is a cross-sectional view of the airbag device in one embodiment of this application, where the blocking member is disposed on the retainer; Figure 16 This is a first schematic diagram of a blocking member disposed on a support portion in one embodiment of this application; Figure 17 This is a first cross-sectional view of the blocking member and the supporting portion in one embodiment of this application; Figure 18 This is a second schematic diagram of a blocking member disposed on a support portion of a base in one embodiment of this application; Figure 19 This is a second cross-sectional view of the blocking member and the supporting portion in one embodiment of this application; Figure 20 This is a third schematic diagram of a blocking member disposed on the support portion of the base in one embodiment of this application; Figure 21 This is a third cross-sectional view of the blocking member and the support portion in one embodiment of this application.
[0020] Icons: 100-Base; 110-Support; 120-Assembly port; 200-Gas generator; 210-Exhaust port; 220-Flange; 230-Outer peripheral surface; 300-Air bag; 310-Assembly; 400-Retainer; 410-Fastener; 411-Nut; 500-Blocking component; 510-Inner surface; 600-Insulation component; 610-Insulation part; 620-Transition part; 630-Limiting part. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0025] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0026] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.
[0027] Figure 1 This is a partial cross-sectional view of an airbag device in related technologies. For example... Figure 1 As shown, in related technologies, the assembly part 310 (i.e., the root of the airbag 300) of the airbag 300 is connected to the base 100. The exhaust port of the gas generator 200 of the airbag device is relatively close to the assembly part 310 of the airbag 300. Therefore, the airflow discharged by the gas generator 200 may directly impact the assembly part 310 of the airbag 300. If the gas generator 200 is a pyrotechnic generator, the emitted gas temperature is high, which may cause the assembly part 310 of the airbag 300 and the connection between the base 100 and the airbag 300 to melt, soften, or burn. This burning will cause the airbag 300 to detach from the base 100, thereby rendering the airbag device ineffective and unable to protect the human body. Therefore, the airbag device in related technologies has poor reliability.
[0028] To improve the poor reliability of airbag devices in related technologies, this application provides an airbag device that, by adding a blocking component, obstructs the high-temperature airflow ejected from the gas generator to a certain extent, thereby reducing the direct airflow blowing onto the assembly part of the airbag, lowering the risk of the assembly part of the airbag being burned, and improving reliability.
[0029] Figure 2 This is an exploded view of an airbag device in one embodiment of this application; Figure 3 This is a schematic diagram of an airbag device in one embodiment of this application (airbag 300 and blocking member 500 are omitted). Figure 2 and Figure 3 As shown, the airbag device provided in this application embodiment includes a base 100, a gas generator 200, and an air bag 300.
[0030] In this embodiment, the base 100 is a shell forming a receiving cavity; the receiving cavity can accommodate the air bag 300 and a portion of the gas generator 200. Normally, when the air bag 300 is not inflated, it is folded or rolled up and stored within the receiving cavity of the base 100. One side of the base 100 is open, forming an opening. When gas released from the gas generator 200 fills the air bag 300, the air bag 300 expands and protrudes through the opening of the base 100 to the outside of the receiving cavity, thereby protecting the occupants. The base 100 has a mounting port 120 that communicates with the receiving cavity. The mounting port 120 is fitted onto the outside of the gas generator 200; that is, a portion of the gas generator 200 extends into the receiving cavity of the base 100 through the mounting port 120. The gas generator 200 has an exhaust port 210, which, in this embodiment, is located within the receiving cavity.
[0031] Figure 4 This is a cross-sectional view of an airbag device in one embodiment of this application. Figure 4 As shown, the air bag 300 has an assembly portion 310 forming an opening. The assembly portion 310 of the air bag 300 is fitted onto the outside of the gas generator 200, that is, a portion of the gas generator 200 extends into the air bag 300 through the opening. The exhaust port 210 of the gas generator 200 is located inside the air bag 300. Therefore, when the gas generator 200 is triggered to release gas, the gas can directly enter the air bag 300, thereby causing the air bag 300 to inflate. In this application, the assembly portion 310 of the air bag 300 is connected to the base 100, specifically to the edge of the assembly port 120. Optionally, the plane containing the assembly port 120 is approximately parallel to the plane containing the opening of the air bag 300; optionally, the central axis of the assembly port 120 coincides with the central axis of the opening of the air bag 300. It should be understood that the extension direction of the central axis of the assembly port 120, i.e. the axial direction of the assembly port 120, is parallel to the inner-outer direction of the opening of the air bag 300, and also parallel to the insertion direction of the gas generator 200 into the assembly port 120; optionally, when the gas generator 200 is a columnar structure, the axis of the gas generator 200 is parallel to or coincides with the central axis of the assembly port 120.
[0032] In this embodiment, the airbag device further includes a retainer 400, which is sleeved on the outside of the gas generator 200. The retainer 400 and the base 100 together clamp the assembly portion 310 of the airbag 300. It is understood that the airbag 300 has a certain degree of flexibility, while the retainer 400 has greater rigidity than the airbag 300. The retainer 400, connected to the assembly portion 310 of the airbag 300, helps maintain the opening shape and position of the airbag 300. The retainer 400 and the base 100 together clamp the assembly portion 310 of the airbag 300, thereby improving the reliability of the connection between the airbag 300 and the base 100. The retainer 400 has a clearance opening that can allow the gas generator 200 to pass through, allowing a portion of the gas generator 200 to extend into the receiving cavity of the base 100. Optionally, the clearance of the retainer 400 is coaxially arranged with the assembly opening 120 of the base 100, that is, their central axes coincide.
[0033] In this embodiment, the gas generator 200 has a cylindrical structure with an outer peripheral surface 230, which is cylindrical. To adapt to the shape of the gas generator 200, in this embodiment, the mounting port 120 of the base 100 and the clearance port of the retainer 400 are both circular holes with a diameter slightly larger than the diameter of the gas generator 200. In other optional embodiments, the gas generator 200 can also be other shapes, such as a cuboid; correspondingly, the specific shapes of the mounting port 120 of the base 100 and the clearance port of the retainer 400 can be adjusted according to the shape of the gas generator 200, for example, set as square holes.
[0034] It is understood that the gas generator 200 needs to be fixed to the base 100 to prevent the gas generator 200 from moving relative to the base 100 in the axial and radial directions of the mounting port 120. Therefore, in this embodiment, a flange 220 is provided on the outer peripheral surface 230 of the gas generator 200. The base 100 includes a support portion 110, and the mounting port 120 is opened in the support portion 110. The gas generator 200 is connected to the support portion 110 through the flange 220, thus achieving relative fixation between the gas generator 200 and the base 100. By providing the support portion 110 and the flange 220, a connection point is provided for fixing the base 100 and the gas generator 200, ensuring the installation reliability of the gas generator 200.
[0035] Since the gas generator 200 may operate at high temperatures, and the base 100 can be made of polymer materials, the support portion 110 of the base 100 is at risk of softening under high temperatures, affecting reliability. Therefore, the airbag device provided in this embodiment further includes a heat insulation component 600, which includes a heat insulation portion 610 disposed between the support portion 110 and the flange 220. This prevents direct contact between the support portion 110 and the flange 220, thus reducing the heat received by the support portion 110 from the flange 220 and preventing the support portion 110 (especially the portion near the inner edge of the gas generator 200) from softening or burning due to excessive temperature. Therefore, in this embodiment, the retainer 400, assembly portion 310, support portion 110, heat insulation portion 610, and flange 220 are sequentially stacked along the axial direction of the assembly port 120. In this embodiment, the heat insulation part 610 has a sheet-like structure, and the heat insulation part 610 is attached to the support part 110 and the flange 220, and surrounds the gas generator 200; that is, a clearance opening is formed in the middle of the heat insulation part 610 to avoid the gas generator 200.
[0036] In this embodiment, the retainer 400, the assembly 310, the support 110, the heat insulation 610, and the flange 220 are connected by fasteners 410. By setting fasteners 410, the retainer 400, the assembly 310, the heat insulation 600, and the gas generator 200 are all fixed relative to the base 100.
[0037] Optionally, the fastener 410 is a bolt. The retainer 400, assembly part 310, support part 110, heat insulation part 610, and flange 220 all have corresponding holes. The bolt passes through these holes sequentially and engages with the nut 411. In other optional embodiments, the holes in the retainer 400 can also be threaded holes. The bolt passes through the flange 220, heat insulation part 610, support part 110, and assembly part 310 sequentially before being screwed onto the retainer 400. In other embodiments, the fastener 410 can also be a rivet, riveting the above structures together.
[0038] Optionally, the airbag device includes a plurality of fasteners 410, which are spaced apart around the gas generator 200; the presence of multiple fasteners 410 increases the connection strength. In this embodiment, the number of fasteners 410 is four; in other embodiments, the number of fasteners 410 may be increased or decreased as needed.
[0039] Optionally, the material of the heat insulation component 600 is a metal or alloy with a high melting point, such as steel, iron, copper, or aluminum. Further, the heat insulation component 600 also includes a transition portion 620 and a limiting portion 630. One end of the transition portion 620 is connected to the heat insulation component 610, and the other end is connected to the limiting portion 630. The limiting portion 630 abuts against the end of the base 100 away from the opening. Optionally, the heat insulation component 600 is a one-piece molded structure with high rigidity. By providing the transition portion 620 and the limiting portion 630, the heat insulation component 600 can support the base 100, increasing the strength of the base 100 and reducing the risk of softening and deformation. In this embodiment, the heat insulation component 600 has two transition portions 620, which are connected to opposite ends of the heat insulation component 610. Each transition portion 620 has a limiting portion 630.
[0040] In this embodiment, the outer peripheral surface 230 of the gas generator 200 surrounds the central axis of the assembly port 120, and the exhaust port 210 is formed on the outer peripheral surface 230 of the gas generator 200. Therefore, the gas generator 200 exhausts gas in its own radial direction, and the exhaust direction is toward the receiving cavity sidewall of the base 100.
[0041] In this application, the airbag device also includes a blocking member 500, which is disposed between the assembly part 310 and the gas generator 200. The blocking member 500 is used to block the gas discharged from the exhaust port 210 from impacting the assembly part 310. Figure 5 This is a partial cross-sectional view of an airbag device in one embodiment of this application. Figure 5 As shown, a portion of the airflow ejected from the exhaust port 210 toward the assembly part 310 is blocked by the blocking member 500, preventing direct impact on the assembly part 310. This avoids the assembly part 310 from melting or burning due to the impact of the high-temperature airflow. Furthermore, the portion of the base 100 connected to the assembly part 310 (specifically, the support part 110 in this embodiment) is also protected from the impact of the high-temperature gas, thus preventing softening or burning. In this configuration, a high connection strength is maintained between the assembly part 310 of the airbag 300 and the base 100, reducing the likelihood of the airbag 300 detaching from the base 100 after gas is introduced. Therefore, the airbag device provided in this application has superior reliability.
[0042] Figure 6 This is a schematic diagram of the installation of the blocking member 500 in one embodiment of this application; Figure 7 This is a partial schematic diagram of an airbag device in one embodiment of this application. Figure 6 and Figure 7As shown, optionally, the blocking member 500 is an annular structure surrounding the gas generator 200. By setting the blocking member 500 as an annular structure, all parts surrounding the inner edges of the mounting portion 310 and the support portion 110 of the gas generator 200 can be protected, resulting in better protection.
[0043] In alternative embodiments, the blocking member 500 may include a plurality of blocking portions spaced apart around the gas generator 200, which are used to block the gas discharged from the exhaust port 210 from impacting the assembly portion 310 of the airbag 300; furthermore, the plurality of blocking portions may be connected by a connecting portion. Alternatively, the airbag device includes a plurality of blocking members 500 spaced apart around the gas generator 200. In both of the above cases, not all locations of the assembly portion 310 are provided with blocking portions (or blocking members 500) between them and the gas generator 200; the blocking portions (or blocking members 500) may be selectively provided in areas requiring key protection. For example, the gas generator 200 may have a plurality of exhaust ports 210 on its outer peripheral surface 230, which are discretely arranged around the circumference of the gas generator 200, and the blocking portions (or blocking members 500) may be correspondingly provided between the area on the outer peripheral surface 230 where the exhaust ports 210 are located and the assembly portion 310. No blocking part (or blocking member 500) is provided between the area on the outer peripheral surface 230 where there is no vent 210 and the assembly part 310, because the probability of the assembly part 310 and the support part 110 being burned by high temperature is low in these locations.
[0044] In this embodiment, the assembly portion 310 of the airbag 300 is connected to the base 100 by a plurality of fasteners 410, which are arranged circumferentially around the gas generator 200. When the blocking member 500 includes a plurality of blocking portions spaced around the gas generator 200, optionally, the blocking portions are correspondingly disposed between the fasteners 410 and the gas generator 200. It is understood that the connection strength between the airbag 300 and the base 100 mainly depends on the structural strength of the assembly portion 310 and the support portion 110 at the fasteners 410. Therefore, providing blocking portions at the locations of the fasteners 410 can effectively improve the protective effect and enhance the reliability of the airbag device. Similarly, in other embodiments, the airbag device may also include a plurality of blocking members 500 spaced around the gas generator 200, with each blocking member 500 correspondingly disposed between the fasteners 410 and the gas generator 200.
[0045] As mentioned above, the connection strength between the air bag 300 and the base 100 mainly depends on the structural strength of the assembly portion 310 and the support portion 110 at the fastener 410. Therefore, to prevent the assembly portion 310 and the support portion 110 at the fastener 410 from softening or even melting, the area on the outer peripheral surface 230 of the gas generator 200 directly opposite the fastener 410 may not have an exhaust port 210. This reduces the impact of the high-temperature airflow on the assembly portion 310 and the support portion 110 at the fastener 410. It should be understood that the airflow discharged from the exhaust port 210 is not necessarily only directed out along the exhaust port 210; there may also be obliquely directed airflow, which may also reach the assembly portion 310 and the support portion 110 at the location of the fastener 410. Therefore, ensuring that a blocking element 500 (or a blocking part) is provided between the fastener 410 and the gas generator 200 can reduce the negative impact of the obliquely directed airflow on the assembly portion 310 and the support portion 110 at the location of the fastener 410 to a certain extent.
[0046] In this embodiment, the blocking member 500 can be connected to the retainer 400, base 100, heat insulation member 600, or flange 220. Specifically, it can be connected to the above-mentioned components by welding, snap-fitting, bonding, riveting, or screwing; the blocking member 500 can also be an integral structure with the retainer 400, base 100, heat insulation member 600, or flange 220. In some optional embodiments, the blocking member 500 can also be placed on the flange 220.
[0047] Figure 8 This is a schematic diagram of a blocking member 500 disposed on flange 220 in one embodiment of this application; Figure 9 This is a cross-sectional view of the airbag device when the blocking member 500 is disposed on the flange 220 in one embodiment of this application. Figure 8 and Figure 9 As shown, the blocking member 500 is annular in shape and is sleeved on the gas generator 200. One end of the blocking member 500 in the axial direction of the gas generator 200 is connected to the side of the flange 220 facing the gas bag 300, and there is a certain gap between the blocking member 500 and the outer peripheral surface 230 of the gas generator 200. Specifically, the blocking member 500 can be connected to the flange 220 by welding. In other embodiments, the blocking member 500 can also be connected to the flange 220 by snap-fit, bonding, riveting, screw connection, or integral casting. As described above, the annular blocking member 500 can also be replaced by multiple blocking members 500 arranged at intervals around the gas generator 200; or, the annular blocking member 500 can be replaced by a blocking member 500 including multiple blocking parts, which are arranged at intervals around the gas generator 200.
[0048] Figure 10This is a schematic diagram of a blocking member 500 disposed on a heat insulation member 600 in one embodiment of this application; Figure 11 This is a cross-sectional view of the airbag device when the blocking member 500 is disposed on the heat insulation member 600 in one embodiment of this application. Figure 10 and Figure 11 As shown, the blocking member 500 is disposed on the inner edge of the heat insulation part 610 and protrudes into the opening of the gas bag 300. It should be understood that the clearance opening on the heat insulation part 610 for the gas generator 200 to pass through is formed by the inner edge of the heat insulation part 610. Since the heat insulation part 600 can be made of metal or alloy, in this embodiment, the blocking member 500 can be formed by folding the inner edge of the heat insulation part 610, or it can be stamped together with the heat insulation part 600. In other embodiments, the blocking member 500 can also be connected to the heat insulation part 600 by snap-fit, adhesive, riveting or screw connection. As described above, the blocking member 500 can also be replaced by a plurality of blocking members 500 arranged at intervals around the gas generator 200; or, the blocking member 500 includes a plurality of blocking parts, which are arranged at intervals around the gas generator 200.
[0049] Figure 12 This is a schematic diagram of a blocking member 500 disposed on a base 100 in one embodiment of this application; Figure 13 This is a cross-sectional view of the airbag device when the blocking member 500 is disposed on the base 100 in one embodiment of this application. Figure 12 and Figure 13 As shown, the blocking member 500 is disposed on the support portion 110 of the base 100, specifically on the inner edge of the support portion 110 and protruding into the air bag 300. It should be understood that the clearance opening on the support portion 110 for the gas generator 200 to pass through is formed by the inner edge of the support portion 110. Since the base 100 can be made of a polymer material (such as plastic), in this embodiment, the blocking member 500 can be integrally formed with the base 100; if the base 100 and the blocking member 500 are made of different materials, a portion of the blocking member 500 can also be embedded within the support portion 110 of the base 100. It can be understood that when the blocking member 500 is made of a polymer material, even if the blocking member 500 itself may be burned by high-temperature gas, it can still provide a certain degree of blocking effect, thereby protecting the assembly portion 310 and the support portion 110. In other embodiments, the blocking member 500 can also be connected to the support portion 110 of the base 100 by snap-fit, adhesive, riveting, or screw connection. As described above, the blocking member 500 can also be replaced by a plurality of blocking members 500 arranged at intervals around the gas generator 200; or, the blocking member 500 may include a plurality of blocking parts arranged at intervals around the gas generator 200.
[0050] Figure 14 This is a schematic diagram of a blocking member 500 disposed on a retaining member 400 in one embodiment of this application; Figure 15 This is a cross-sectional view of the airbag device when the blocking member 500 is disposed on the retainer 400 in one embodiment of this application. Figure 14 and Figure 15 As shown, the blocking member 500 is disposed on the inner edge of the retainer 400 and protrudes outward from the opening of the gas bag 300. It should be understood that the clearance opening on the retainer 400 for the gas generator 200 to pass through is formed by the inner edge of the retainer 400. In this embodiment, the blocking member 500 can be integrally formed with the retainer 400 (e.g., by stamping). In other embodiments, the blocking member 500 can also be connected to the support portion 110 of the base 100 by means of snap-fit, bonding, riveting or screw connection. As described above, the blocking member 500 can also be replaced by a plurality of blocking members 500 arranged at intervals around the gas generator 200; or, the blocking member 500 includes a plurality of blocking portions arranged at intervals around the gas generator 200.
[0051] Please refer to the previous document. Figure 5 Optionally, the projection of the blocking member 500 on the outer peripheral surface 230 of the gas generator 200 does not cover the exhaust port 210, and along the axial direction of the mounting port 120, the projection of the blocking member 500 is closer to the outer side of the exhaust port 210 relative to the opening; wherein, the projection direction of the projection of the blocking member 500 is radial to the mounting port 120 (i.e., Figure 5 (Horizontal direction in the figure). By setting it in this way, the blocking member 500 can protect the assembly part 310 while minimizing interference with the gas generator 200's exhaust into the gas bag 300. This avoids a significant reduction in the exhaust flow rate of the gas generator 200 due to the blocking member 500 obstructing the exhaust port 210 to a large extent, which would affect the expansion speed of the gas bag 300. It is understood that when the expansion speed of the gas bag 300 is insufficient, it will not be able to exert its protective effect in time. Optionally, the projection of the blocking member 500 on the outer peripheral surface 230 of the gas generator 200 is close to the inner edge of the gas bag 300 and aligned with the outer edge of the exhaust port 210 near the outside of the gas bag 300 (the lower edge in the figure). This ensures that the blocking member 500 does not obstruct the exhaust port 210 and also provides a greater degree of protection for the assembly part 310 of the gas bag 300. In other embodiments, the projection of the blocking member 500 on the outer peripheral surface 230 of the gas generator 200 may also cover part or completely cover the exhaust port 210; or, the projection of the blocking member 500 on the outer peripheral surface 230 of the gas generator 200 may be spaced apart from the exhaust port 210.
[0052] In an optional embodiment, the blocking member 500 has an inner surface 510 facing the gas generator 200, extending from the outside of the gas bag 300 to the inside of the gas bag 300 along the axial direction of the assembly port 120, and the distance between the inner surface 510 of the blocking member 500 and the central axis of the assembly port 120 gradually increases. Figure 16This is a first schematic diagram of a blocking member 500 disposed on a support portion 110 in one embodiment of this application; Figure 17 This is a first cross-sectional view of the blocking member 500 and the support portion 110 in one embodiment of this application. Figure 16 and Figure 17 As shown, taking the annular structure of the blocking member 500 disposed on the support portion 110 as an example, along the axial direction of the assembly port 120 from the outside of the air bag 300 to the inside of the air bag 300, the inner diameter of the blocking member 500 gradually increases, and the distance between the inner side surface 510 of the blocking member 500 and the central axis of the assembly port 120 gradually increases. This arrangement results in the gap width between the inner side surface 510 of the blocking member 500 and the outer peripheral surface 230 of the gas generator 200 gradually increasing in the direction from the outside of the air bag 300 to the inside of the air bag 300. Therefore, the inner side surface 510 of the blocking member 500 has a good guiding effect, which can guide the airflow between the blocking member 500 and the gas generator 200 into the air bag 300, facilitating the smooth entry of the airflow into the air bag 300 and causing the air bag 300 to inflate. Optionally, the angle between the inner side surface 510 of the blocking member 500 and the central axis of the assembly port 120 can be 5° to 60°, such as 45°; in other words, the angle between the blocking member 500 and the support portion 110 is an acute angle of 30° to 85°.
[0053] In alternative embodiments, along the axial direction of the assembly port 120 from the outside of the air bag 300 to the inside of the air bag 300, the distance between the inner side surface 510 of the blocking member 500 and the central axis of the assembly port 120 gradually decreases, such as... Figure 18 and Figure 19 As shown. Optionally, the angle between the inner surface 510 of the blocking member 500 and the central axis of the mounting opening 120 can be 5° to 60°, for example, 45°; in other words, the angle between the blocking member 500 and the support portion 110 is an obtuse angle of 95° to 150°. In other embodiments, the inner surface 510 of the blocking member 500 can also be parallel to the central axis of the mounting opening 120, such as... Figure 20 and Figure 21 As shown.
[0054] In summary, the airbag device provided in this application includes a base 100, a gas generator 200, an air bag 300, and a blocking member 500. The base 100 has an assembly opening 120, and the air bag 300 has an assembly portion 310 forming an opening. Both the assembly opening 120 and the opening are fitted onto the outside of the gas generator 200. The assembly portion 310 of the air bag 300 is connected to the base 100. The gas generator 200 has an exhaust port 210 located inside the air bag 300. The blocking member 500 is disposed between the assembly portion 310 and the gas generator 200, and is used to prevent the gas discharged from the exhaust port 210 from impacting the assembly portion 310. In this application embodiment, by adding the blocking member 500, the high-temperature gas ejected from the gas generator 200 can be blocked, preventing direct impact of the high-temperature gas on the assembly portion 310 of the air bag 300. Therefore, the blocking member 500 can reduce the risk of the assembly part 310 of the airbag 300 and the part of the base 100 that connects to the airbag 300 melting, softening, or burning due to high-temperature gas, thereby reducing the risk of connection failure between the airbag 300 and the base 100; thus, it can ensure that the airbag 300 can inflate and deploy to perform its protective function. It can be seen that the airbag device provided in this application embodiment has better reliability.
[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. An airbag device, characterized in that, The device includes a base (100), a gas generator (200), an air bag (300), and a blocking member (500). The base (100) has an assembly port (120), and the air bag (300) has an assembly part (310) forming an opening. The assembly port (120) and the assembly part (310) are both sleeved on the outside of the gas generator (200). The assembly part (310) of the air bag (300) is connected to the base (100). The gas generator (200) has an exhaust port (210) located inside the air bag (300). The blocking member (500) is disposed between the assembly part (310) and the gas generator (200). The blocking member (500) is used to prevent the gas discharged from the exhaust port (210) from impacting the assembly part (310).
2. The airbag device according to claim 1, characterized in that, The airbag device also includes a retainer (400) which is sleeved on the outside of the gas generator (200). The retainer (400) and the base (100) together hold the assembly part (310) of the airbag (300).
3. The airbag device according to claim 2, characterized in that, The blocking member (500) is connected to the retaining member (400).
4. The airbag device according to claim 1, characterized in that, The outer peripheral surface (230) of the gas generator (200) is provided with a flange (220), the base (100) includes a support (110), the assembly port (120) is opened in the support (110), and the gas generator (200) is connected to the support (110) through the flange (220).
5. The airbag device according to claim 4, characterized in that, The airbag device also includes a heat insulation component (600), which includes a heat insulation part (610). The assembly part (310), the support part (110), the heat insulation part (610) and the flange (220) are stacked sequentially in the axial direction of the assembly port (120).
6. The airbag device according to claim 5, characterized in that, The blocking member (500) is disposed on the heat insulation part (610).
7. The airbag device according to claim 4, characterized in that, The blocking member (500) is disposed on the support portion (110).
8. The airbag device according to claim 4, characterized in that, The blocking element (500) is disposed on the flange (220).
9. The airbag device according to claim 1, characterized in that, The gas generator (200) has an outer peripheral surface (230) surrounding the central axis of the assembly port (120), and the exhaust port (210) is located on the outer peripheral surface (230) of the gas generator (200).
10. The airbag device according to claim 9, characterized in that, The projection of the blocking member (500) on the outer peripheral surface (230) does not cover the exhaust port (210), and along the axial direction of the assembly port (120), the projection of the blocking member (500) is located on the outer side of the opening of the air bag relative to the exhaust port (210); wherein the projection direction of the projection of the blocking member (500) is radial to the assembly port (120).
11. The airbag device according to claim 9, characterized in that, The blocking member (500) has an inner side (510) facing the gas generator (200). Along the axial direction of the assembly port (120), from the outside of the air bag (300) to the inside of the air bag (300), the distance between the inner side surface (510) and the central axis of the assembly port (120) gradually increases or gradually decreases, or the inner side surface (510) is parallel to the central axis of the assembly port (120).
12. The airbag device according to claim 1, characterized in that, The blocking member (500) is a ring-shaped structure surrounding the gas generator (200); Alternatively, the blocking member (500) may include a plurality of blocking portions arranged at intervals around the gas generator (200), the blocking portions being used to prevent gas discharged from the exhaust port (210) from impacting the assembly portion (310) of the gas bag (300). Alternatively, the airbag device may include a plurality of the blocking elements (500) spaced apart around the gas generator (200).
13. The airbag device according to claim 1, characterized in that, The assembly part (310) of the air bag (300) is connected to the base (100) by a plurality of fasteners (410), which are arranged circumferentially around the gas generator (200). The blocking member (500) includes a plurality of blocking portions arranged at intervals around the gas generator (200), the blocking portions being disposed one-to-one between the fastener (410) and the gas generator (200); or, the airbag device includes a plurality of the blocking members (500) arranged at intervals around the gas generator (200), the blocking members (500) being disposed one-to-one between the fastener (410) and the gas generator (200).