Safety air bag, safety air bag device, seat and vehicle

Abstract

The utility model relates to a safety air bag, a safety air bag device, a seat and a vehicle, the safety air bag comprises a first air bag and a second air bag, the first air bag is configured to be unfolded first when the safety air bag is inflated, and the second air bag is configured to be unfolded after the first air bag is inflated to preset air pressure; according to the technical scheme, in the unfolding process, due to the fact that the second air bag is taken out of the preset space in the unfolding process of the first air bag, and after the first air bag is inflated to the preset air pressure, the second air bag is unfolded outside the preset space, and the second air bag is unfolded outside the preset space; and the effect of integral delayed segmented unfolding of the safety air bag is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle airbags, and particularly relates to an airbag, an airbag device, a seat, and a vehicle. Background Art

[0002] Vehicles are equipped with airbags. In the event of a collision, the gas generator is activated to inflate the airbag, and the airbag can act as a buffer for the occupant to reduce injuries.

[0003] In the related art, the airbag is configured at a corresponding position on the vehicle, such as on the seat. When a collision accident occurs, during the deployment process of the airbag, the seat belt will interfere with the airbag, affecting the smooth deployment of the airbag. Summary of the Utility Model

[0004] Embodiments of the present application provide an airbag, an airbag device, a seat, and a vehicle, which improve the smooth deployment of the airbag to at least partially solve the above technical problems.

[0005] To achieve the above object, according to the first aspect of the present application, an airbag is provided, including:

[0006] A first airbag, adapted to be received in a preset space of the seat backrest and configured to deploy first when the airbag is inflated;

[0007] A second airbag, disposed at an end of the first airbag and configured to be carried out of the preset space by the first airbag when the first airbag deploys and to deploy after the first airbag is inflated to a preset air pressure.

[0008] Optionally, before the first airbag is inflated to the preset air pressure, the second airbag is in a folded manner.

[0009] Optionally, the airbag further includes:

[0010] A restricting portion, configured to separate the first airbag and the second airbag before the first airbag is inflated to the preset air pressure.

[0011] Optionally, the restricting portion is configured as a suture line, sewn between the first airbag and the second airbag;

[0012] Or, the restricting portion is configured as an adhesive, bonded between the first airbag and the second airbag.

[0013] Optionally, after the first airbag is inflated to the preset air pressure, the suture line or the adhesive releases the separation between the first airbag and the second airbag, so that the first airbag and the second airbag are communicated.

[0014] Optionally, the length ratio of the first airbag to the second airbag after deployment is 0.8 - 1.5.

[0015] According to a second aspect of the present application, there is provided an airbag device including the airbag as described above.

[0016] Optionally, the airbag device includes:

[0017] A gas generator provided with:

[0018] A gas outlet for communicating with at least the first airbag.

[0019] Optionally, the airbag device further includes:

[0020] A guiding member disposed in the preset space;

[0021] wherein the guiding member is adapted to guide the airbag to deploy along a predetermined route.

[0022] Optionally, the guiding member is configured as a structural fabric.

[0023] According to a third aspect of the present application, there is provided a seat for a vehicle, the seat including:

[0024] The airbag as described above or the airbag device as described above.

[0025] Optionally, the seat further includes:

[0026] A seat back for providing a preset space;

[0027] A tear line adapted to sew the preset space so that the airbag forms an integral body with the seat back.

[0028] Optionally, when the airbag is inflated, the tear line releases the restriction on the airbag so that the airbag pops out from the preset space.

[0029] Optionally, when a three-point seat belt is fastened to the seat and the airbag is received in the preset space, in a first direction, the projection of the restricting portion of the airbag does not intersect with the projection of the shoulder belt portion of the seat belt;

[0030] wherein the first direction is a direction perpendicular to the plane of the seat back of the seat.

[0031] According to a fourth aspect of the present application, there is provided a vehicle including:

[0032] A vehicle body;

[0033] A seat as described above;

[0034] Among them, the seat is adapted to be assembled inside the vehicle body.

[0035] The beneficial effect of this application lies in: providing a vehicle that can better utilize the airbag to protect the occupants by setting the staged deployment of the airbag during the inflation and deployment process.

[0036] More specifically, some embodiments of this application may produce the following specific beneficial effects: In the airbag of the embodiments of this application, the first airbag is configured to deploy first when the airbag is inflated, and the second airbag is configured to be taken out of a preset space when the first airbag deploys, and deploy after the first airbag is inflated to a preset air pressure, completing the deployment of the first airbag and the second airbag of the airbag. Through the above technical solution, during the deployment process, since the second airbag is taken out of the preset space during the deployment of the first airbag, and after the first airbag is inflated to the preset air pressure, the second airbag then deploys outside the preset space, the overall delayed staged deployment effect of the airbag is achieved.

[0037] Other features and advantages of this application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] In order to more fully understand this application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0040] Figure 1 is a schematic diagram of the overall structure of the seat provided in the exemplary embodiment of this application;

[0041] Figure 2 is a schematic diagram of the overall structure of the airbag in the pre-deployment state provided in the exemplary embodiment of this application;

[0042] Figure 3 is a schematic diagram of the overall structure of the airbag in the fully deployed state provided in the exemplary embodiment of this application;

[0043] Figure 4 is a schematic diagram of the structure in which the first airbag and the second airbag are separated by a limiting part provided in the exemplary embodiment of this application;

[0044] Figure 5It is a schematic diagram of the airbag deployment process provided in the exemplary embodiment of the present application;

[0045] Figure 6 It is a schematic diagram of the overall structure of a vehicle provided in the exemplary embodiment of the present application;

[0046] Explanation of reference numerals:

[0047] 1, Vehicle; 2, Occupant;

[0048] 10, Seat; 30, Seat belt;

[0049] 100, Airbag device;

[0050] 110, Airbag; 111, First airbag; 112, Second airbag;

[0051] 113, Restriction part;

[0052] 120, Gas generator; 12a, Gas outlet; 121, Generator body;

[0053] 210, Seat back; 220, Tear line; 230, Connecting member;

[0054] 310, First end; 320, Second end. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0056] Refer to Figures 1 to 5 As shown, for the convenience of introduction, the upper, lower, left, and right orientations are adopted in the corresponding drawings to facilitate the introduction of the relative positional relationship between various parts in the present application, and it should not be construed as a limitation on the absolute position.

[0057] According to the first aspect of the present application, refer to Figures 1 to 4 , the present application provides an airbag 110, including a first airbag 111 and a second airbag 112, and the second airbag 112 is disposed at the end of the first airbag 111.

[0058] Wherein, the airbag 110 can be connected to the seat 10 or other structures, such as the corresponding structure of a motorcycle, and can play a role in protecting the occupant.

[0059] Inflate the airbag 110 so that the airbag 110 can expand and deploy.

[0060] The first airbag 111 is configured to be deployed earlier than the second airbag 112 when the safety airbag 110 is inflated. The second airbag 112 is configured to be brought out of a preset space by the first airbag 111 when the first airbag 111 is deployed, and to be deployed after the first airbag 111 is inflated to a preset air pressure.

[0061] The airbag 110 may be connected to a seat back 210 of the seat 10 . The seat back 210 is used to provide a preset space (not shown in the figure), and the airbag 110 is located in the preset space.

[0062] The airbag 110 in the embodiment of the present application has a stowed state, a pre-deployed state, and a fully deployed state.

[0063] When the airbag 110 is accommodated in the preset space of the seat back 210 , the airbag 110 is in an accommodated state. At this time, the entire airbag 110 is accommodated in the preset space of the seat back 210 .

[0064] refer to Figure 2 When the first airbag 111 of the airbag 110 is inflated, so that the airbag 110 is completely popped out from the preset space of the seat back 210 to the outside of the seat back 210, the airbag 110 is in a pre-deployment state. During the inflation of the first airbag 111, the second airbag 112 will be synchronously brought out of the preset space by the first airbag 111 and popped out of the seat back 210, completing the complete popping out of the airbag 110. At this time, the airbag 110 is in a pre-deployment state that is not fully deployed.

[0065] When the vehicle 1 collides, the collision degree reaches the ignition condition of the airbag 110, and the airbag 110 switches from the storage state to the pre-deployment state. At this time, the airbag 110 partially unfolds and extends to wrap the left side of the occupant 2.

[0066] In this case, the first airbag 111 wraps the left side of the occupant 2 .

[0067] refer to Figure 2 When the airbag 110 is in the pre-deployment state, the gas generator 120 continuously supplies air to the airbag 110, so that after the first airbag 111 is inflated to a preset air pressure, the second airbag 112 is subsequently deployed to complete the effect of supplying air to the airbag 110, so that the airbag 110 is in a fully deployed state. At this point, the wrapped airbag 110 is fully deployed.

[0068] It can be understood that the first airbag 111 is disposed within a preset space, and the second airbag 112 is disposed at the end of the first airbag 111. During the deployment process, the first airbag 111 takes the second airbag 112 out of the preset space, and after the first airbag 111 is inflated to a preset air pressure, the second airbag 112 then deploys outside the preset space. The length of the preset space can be designed according to the actual requirements of the seat supplier or the vehicle manufacturer.

[0069] Further, in order to enable the second airbag 112 to deploy smoothly and avoid being obstructed by obstacles during the deployment process, such as the interference of the seat belt 30, the end position of the preset space can be offset from the seat belt, so as to enable the smooth deployment of the airbag 110 and ensure that maximum protection is provided to the occupant during a collision.

[0070] After the airbag 110 in the embodiment of the present application is fully deployed, it can wrap the occupant 2 in all directions, and the protection effect is good.

[0071] In some embodiments, the first airbag 111 and the second airbag 112 are configured to be connected and arranged.

[0072] After the first airbag 111 is inflated to the preset air pressure, continue to inflate the first airbag 111, so that the gas in the first airbag 111 enters the second airbag 112, enabling the second airbag 112 to deploy to the preset position.

[0073] In some embodiments, before the first airbag 111 is inflated to the preset air pressure, the second airbag 112 is in a folded manner. It can be understood that in order to save the installation space and ensure rapid deployment during a collision, the second airbag 112 is usually compactly folded and installed in the preset space when it is not triggered to pop out of the preset space. This folding method not only reduces the space occupation but also ensures that the airbag can deploy quickly and evenly when inflated.

[0074] In some embodiments, the airbag 110 includes a restricting portion 113.

[0075] The restricting portion 113 is used to separate the first airbag 111 and the second airbag 112 before the first airbag 111 is inflated to the preset air pressure.

[0076] It can be understood that the main function of the restricting portion 113 is to form a physical barrier between the first airbag 111 and the second airbag 112, ensuring that they do not interfere with each other during the inflation process. This helps to maintain the independence and effectiveness of each airbag, enabling them to fully play their roles in their respective protection areas.

[0077] Although the inflation of the airbag is a highly automated process, the restricting portion 113 can, to a certain extent, control the inflation sequence of the first airbag 111 and the second airbag 112. By ensuring that the first airbag 111 is not affected by the inflation of the second airbag 112 before reaching the preset air pressure, the arrangement of the restricting portion 113 helps to achieve more precise inflation control, thereby improving the overall protection effect.

[0078] When the airbag 110 is in the housed state and the pre-deployment state, the restricting portion 113 separates the first airbag 111 and the second airbag 112. When the airbag 110 is in the fully deployed state, the restricting portion 113 is subjected to the air pressure from the first airbag 111 and then bursts open, releasing the separation between the first airbag 111 and the second airbag 112, allowing the gas in the first airbag 111 to flow into the second airbag 112 to complete the inflation of the airbag 110.

[0079] In some embodiments, the restricting portion 113 is configured as a suture line stitched between the first airbag and the second airbag. It can be understood that, as the restricting portion 113, the suture line has a relatively simple structure and is easy to manufacture. This helps to reduce the complexity and cost of the airbag system.

[0080] Alternatively, the restricting portion 113 can also be configured as an adhesive bonded between the first airbag 111 and the second airbag 112. It can be understood that in the airbag 110, the adhesive is used to fix the connection between the first airbag 111 and the second airbag 112. The adhesive has excellent sealing performance and good adhesion, which can ensure that the airbag 110 will not fall off or interfere with the deployment of the airbag 110 during normal deployment.

[0081] In some embodiments, after the first airbag 111 is inflated to the preset air pressure, the suture line or the adhesive releases the separation between the first airbag 111 and the second airbag 112 to enable the first airbag 111 and the second airbag 112 to communicate.

[0082] In some specific embodiments, the linear restricting portion 113 is a suture line that temporarily fixes two surfaces of the airbag 110. After supplying gas to the first airbag 111, when the gas pressure in the first airbag 111 acts on the two surfaces of the airbag 110, the airbag 110 can easily break free from the suture line to complete the communication between the first airbag 111 and the second airbag 112.

[0083] In some specific embodiments, the restricting portion 113 can also be in the form of heat stamping to cause a phase change and bonding of a part of the two surfaces of the airbag 110 together, thereby also completing the separation of the first airbag 111 and the second airbag 112 of the airbag 110.

[0084] When using heat ironing to cause phase changes in parts of two sides of the airbag 110 and bond them together, it is necessary to ensure that the two sides of the airbag 110 will not damage the self-structure of the airbag 110 after separation, so as to ensure the connectivity and sealing of the air chamber.

[0085] In some specific embodiments, the restricting part 113 can also be an adhesive, directly bonding parts of the two sides of the airbag 110 together, thereby also being able to complete the separation of the first airbag and the second airbag of the airbag 110.

[0086] In some embodiments, the length ratio of the first airbag 111 to the second airbag 112 after deployment is 0.8 - 1.5.

[0087] It can be understood that the length ratio of 0.8 - 1.5 refers to the ratio range of the length of the first airbag 111 after deployment to the length of the second airbag 112 after deployment. Specifically, if the length of the second airbag 112 is L, then the length of the first airbag will be between 0.8L and 1.5L.

[0088] When the length ratio is close to 0.8, the first airbag 111 is relatively short and may mainly cover the chest and upper body of the driver or passenger, while the second airbag 112 provides more extensive side protection. This configuration may be suitable for vehicle models that require more side protection or have limited space.

[0089] When the length ratio is close to 1.5, the first airbag 111 is relatively long and may cover more body areas, including the head and upper body. This helps to provide more comprehensive protection in a frontal collision.

[0090] Reference Figure 2 and Figure 3 , the length ratio of the first airbag 111 to the second airbag 112 after deployment is set to 1.25. Of course, it can also be set to 0.8, 0.9, 1, 1.5 or other ratios, subject to the smooth deployment of the first airbag 111 and the second airbag 112 after being fitted to the seat 10.

[0091] According to the second aspect of the present application, an airbag device 100 is provided. The airbag device 100 includes the airbag 110 described above, and thus has all the beneficial effects described for the above-mentioned airbag 110, which will not be elaborated here.

[0092] In some embodiments, the airbag device 100 includes: a gas generator 120.

[0093] The gas generator 120 is provided with a gas outlet 12a, and the gas outlet 12a is used to be connected to at least the first airbag 111.

[0094] For example, the gas generator 120 may be connected to the seat 10 .

[0095] refer to Figure 2 and Figure 3 The gas generator 120 includes a generator body 121 and a gas outlet 12 a . The generator body 121 is connected to the seat 10 , and the gas outlet 12 a is connected to the first airbag 111 .

[0096] When the gas generator 120 supplies air to the first airbag 111 so that the first airbag 111 reaches a preset air pressure and the suture line is broken, the first airbag 111 is connected with the second airbag 112 and the second airbag 112 starts to be inflated.

[0097] refer to Figure 2 The gas generator 120 can be set on the left side of the seat 10, and the occupant 2 is fixed to the seat 10 by the seat belt 30. When the vehicle 1 collides sideways, the gas generator 120 ignites and quickly generates a large amount of gas to cause the first airbag 111 of the airbag 110 to deploy and pop out of the seat back 210 and bring out the preset space for the second airbag 112 to pop out of the seat back 210. Since the gas generator 120 is fixed to the lower left side of the seat back 210, during the deployment process, the first airbag 111 will extend along the left side and upper part of the seat back 210 after popping out of the seat back 210, and then the second airbag 112 will gradually deploy and extend to wrap the right side of the occupant 2, and then the airbag 110 will be fully deployed.

[0098] In some embodiments, the airbag device 100 further includes a guide member.

[0099] The guide component is arranged in a preset space.

[0100] The guide component can guide the airbag 110 to deploy along a preset route.

[0101] In some embodiments, a guide component can be set in a preset space of the seat back 210 corresponding to the first airbag 111, and a wire component is set in the preset space to isolate the airbag 110 from the seat back. When the first airbag 111 begins to inflate, the wire component can guide the first airbag 111 to pop out along the preset space. At the same time, since the material of the seat may be leather or cloth, some sharper parts may interfere with the first airbag 111 during the popping-out process. The wire component can also protect the first airbag 111.

[0102] In some embodiments, the second airbag 112 is provided at the end of the first airbag 111. It can be understood that the second airbag 112 is taken out of the preset space after the first airbag 111 is inflated. During the taking-out process, the guiding member can prevent the popping path of the second airbag 112 from being out of control, and can play a guiding role after the second airbag 112 pops out of the preset space, and can also protect the second airbag 112 to avoid interference from the seat.

[0103] In some embodiments, the guiding member is configured as a structural fabric. Of course, it can also be configured as a plastic part. Using the guiding member can prevent the first airbag 111 and the second airbag 112 from being scratched.

[0104] According to the third aspect of the present application, referring to Figure 1 , a seat 10 for a vehicle is provided, and the seat 10 includes an airbag 110 or an airbag device 100.

[0105] Since the seat 10 includes the airbag 110 or the airbag device 100, it has all the beneficial effects of including the airbag 110 or the airbag device 100, which will not be elaborated here.

[0106] In some embodiments, the seat 10 further includes a seat back 210 and a tear line 220.

[0107] Wherein, the seat back 210 is used to provide a preset space, and the tear line 220 is adapted to sew the preset space to form an integral body with the airbag 110 and the seat back 210.

[0108] In some embodiments, when the airbag 110 is inflated, the tear line 220 is subjected to the impact force of the airbag 110 and thus tears open, releasing the restriction on the airbag 110 so that the airbag 110 pops out of the preset space.

[0109] In some embodiments, when the airbag 110 is located in the preset space of the seat back 210 and the three-point seat belt 30 is fastened to the seat 10, along the first direction, the third projection of the shoulder belt part of the seat belt 30 does not intersect with the second projection of the tear line 220, that is, they are completely staggered.

[0110] It should be noted that the first direction is the direction perpendicular to the plane of the seat back of the seat. Referring to Figure 3 , Figure 3 As shown, the plane formed by the up-down direction and the left-right direction is the plane of the seat back. It can be understood that

[0111] The first direction is perpendicular to the up-down direction and the left-right direction respectively. The purpose of such a design is to ensure that the airbag 110 is not interfered by the seat belt.

[0112] In some specific embodiments, the tear line 220 extends from the left side of the seat 10 towards the upper part of the seat 10. A part of the tear line 220 is disposed on one side of the first end 310 of the seat belt 30, and another part of the tear line 220 extends to one side of the second end 320 of the seat belt 30.

[0113] Exemplarily, referring to Figure 2 and Figure 3 , the entire tear line 220 is located on the left side of the seat belt 30, such that the projection of the shoulder strap portion of the seat belt along the first direction does not intersect with the projection of the tear line 220 along the first direction.

[0114] Exemplarily, the tear line 220 can be extended to a position close to the headrest of the seat. At this time, the tear line 220 just avoids the position of the seat belt 30, and the tear line 220 can be used to sew up the preset space to the greatest extent. The length of the tear line 220 is substantially the same as the length of the first airbag 111 installed in the seat 10, ensuring that the airbag 110 pops out at the preset position.

[0115] Along the left side to the right side of the seat 10, the seat belt 30 is fastened to the seat 10, and the first end 310 of the seat belt 30 extends obliquely towards the second end 320 to fix the occupant 2 to the seat 10.

[0116] When the airbag is housed in the preset space, along the first direction, the projection of the limiting portion 113 does not intersect with the projection of the shoulder strap portion of the seat belt 30.

[0117] In some embodiments, referring to Figure 2 , when the first airbag 111 pops out of the preset space and the second airbag 112 is not deployed, along the direction perpendicular to the backrest plane of the backrest 210, the first projection of the first airbag 111 does not intersect with the third projection of the seat belt 30, that is, they are completely staggered.

[0118] Exemplarily, after the airbag 110 is deployed, the first airbag 111 is located between the first end 310 and the second end 320 of the seat belt 30, and along the left side of the seat 10 towards the upper part of the seat 10. The second airbag 112 then continues to deploy along the right side of the seat 10, for example, to the waist of the upper body, achieving the wrapping of the occupant 2 in specific situations.

[0119] In some embodiments, the seat 10 further includes a connecting member 230.

[0120] The connecting member 230 is connected between the airbag 110 and the backrest 210.

[0121] By providing the connecting member 230, when the entire airbag 110 pops out from the seat back 210, one end of the connecting member 230 is fixed to the seat back 210, and the other end pulls the airbag 110, so that the airbag 110 is located at a preset position. Then, the second airbag 112 of the airbag 110 gradually unfolds and extends to wrap the right side of the occupant 2.

[0122] The connecting member 230 is configured as a pull belt, one end of the pull belt is fixed to the seat back 210, and one end is connected to the first airbag 111.

[0123] In the embodiment of the present application, the airbag 110 will be deployed in a two-stage manner. Without interfering with the normal use of the seat belt 30, it first deploys on the left side and then on the right side, avoiding the seat belt 30 or other obstacles, such as the B-pillar, and achieving the protective effect of the airbag 110 fully covering the occupant 2 in all directions.

[0124] Reference Figure 5 , during the deployment process of the airbag 110 of the airbag device 100 in the embodiment of the present application, the following state changes occur in sequence:

[0125] State 201: Both the first airbag 111 and the second airbag 112 are received in the preset space of the seat back 210, and the second airbag 112 is received in the preset space of the seat back 210;

[0126] State 202: The gas generator 120 supplies gas to the first airbag 111, so that the first airbag 111 exerts pressure on the seat back 210, and the tear line 220 is damaged;

[0127] State 203: The first airbag 111 and the second airbag 112 pop out from the seat back 210 along the tear line 220 at the damaged part, and the second airbag 112 remains folded, completing the pre-deployment of the airbag 110;

[0128] State 204: The restricting part 113 between the first airbag 111 and the second airbag 112 is damaged by the pressure of the gas in the first airbag 111;

[0129] State 205: The gas in the first airbag 111 enters the second airbag 112, completing the full deployment of the airbag 110.

[0130] The working principle process of the airbag device 100 in the embodiment of the present application:

[0131] The gas generator 120 is arranged on the left side of the seat 10. The occupant 2 is fixed to the seat 10 by the seat belt 30. The tear line 220 extends from the lower left side of the first end of the seat belt over the headrest to the upper right side of the second end of the seat belt.

[0132] When the vehicle 1 collides sideways, the gas generator 120 ignites and rapidly generates a large amount of gas, causing the first airbag 111 of the airbag 110 to deploy and pop out of the seat back 210 and bring out the second airbag 112 to pop out of the preset space of the seat back 210. Since the gas generator 120 is fixed to the lower left side of the seat back 210, during the deployment process, the first airbag 111 will extend along the left side and upper part of the seat back 210 after popping out of the seat back 210. When the first airbag 111 is inflated to the preset air pressure, the second airbag 112 is located outside the preset space and is in a folded manner. When the first airbag 111 is inflated to the preset air pressure, the second airbag 112 will also gradually deploy and extend to wrap the right side of the occupant 2. At this point, the airbag 110 is fully deployed.

[0133] It should be noted that the deployment of the safety airbag 110 is an instantaneous process, so the delay time of the extended segmented deployment of the first airbag 111 and the second airbag 112 is also very fast, which can be within a few tenths of a second.

[0134] According to the fourth aspect of the present application, reference Figure 6 , a vehicle 1 is provided, comprising a vehicle body and a seat 10. The vehicle 1 comprises the seat 10, which is suitable for being assembled inside the vehicle body for passengers to sit on. All the beneficial effects of the seat 10 have been described above and will not be repeated in this application.

[0135] The vehicle 1 in the embodiment of the present application may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present application does not make any specific limitation on this.

[0136] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0137] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0138] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0139] The above are only the preferred embodiments of the present application and do not impose any formal restrictions on the present application. Although in the embodiments of the present application, the descriptions of each embodiment have their own emphases, for the parts not detailed in a certain embodiment, reference can be made to the relevant embodiments of other embodiments. However, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. An airbag, characterized in that, Comprising: A first airbag, adapted to be received in a preset space of a seat backrest and configured to deploy first when the airbag is inflated; A second airbag, disposed at an end of the first airbag, configured to be carried out of the preset space by the first airbag when the first airbag deploys, and to deploy after the first airbag is inflated to a preset air pressure.

2. The airbag according to claim 1, characterized in that, Before the first airbag is inflated to the preset air pressure, the second airbag is in a folded manner.

3. The airbag according to claim 1, characterized in that, The airbag further comprises: A restricting portion for separating the first airbag and the second airbag before the first airbag is inflated to the preset air pressure.

4. The airbag according to claim 3, characterized in that, The restricting portion is configured as a suture line sewn between the first airbag and the second airbag; Or, the restricting portion is configured as an adhesive bonded between the first airbag and the second airbag.

5. The airbag according to claim 4, wherein After the first airbag is inflated to the preset air pressure, the suture line or the adhesive releases the separation between the first airbag and the second airbag, so that the first airbag and the second airbag communicate.

6. The airbag according to claim 1, characterized in that, The length ratio of the first airbag and the second airbag after deployment is 0.8 - 1.

5.

7. An airbag device, characterized in that, Comprising the airbag according to any one of claims 1 to 6.

8. The airbag device according to claim 7, wherein Comprising: A gas generator provided with: A gas outlet for communicating with at least the first airbag.

9. The airbag device according to claim 7, characterized in that, Further comprising: A guiding member disposed in the preset space; Wherein, the guiding member is adapted to guide the airbag to deploy along a predetermined route.

10. The airbag device according to claim 9, characterized in that, The guiding member is configured as a structural cloth.

11. A seat for a vehicle, characterized in that, Comprising: The airbag according to any one of claims 1 to 6 or the airbag device according to any one of claims 7 to 10.

12. The seat according to claim 11, characterized in that, Further comprising: A seat backrest for providing a preset space; A tear line adapted to sew the preset space so that the airbag and the seat backrest form an integral body.

13. The seat according to claim 12, characterized in that, When the airbag is inflated, the tear line releases the restriction on the airbag so that the airbag pops out of the preset space.

14. The seat according to any one of claims 12 to 13, wherein When a three-point seat belt is fastened to the seat and the airbag is received in the preset space, along a first direction, the projection of the restricting portion of the airbag does not intersect the projection of the shoulder belt portion of the seat belt; Wherein, the first direction is a direction perpendicular to the plane of the seat backrest.

15. A vehicle, characterized in that, Comprising a vehicle body and the seat according to any one of claims 11 to 14, the seat being adapted to be assembled inside the vehicle body.

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