Air bag and seat air bag device

Abstract

The invention discloses an air bag and a seat air bag device, the air bag comprises a main air bag, the main air bag comprises a main cavity and an air inlet cavity, the air inlet cavity extends outwards from the main cavity, and when an air generator is installed in the air inlet cavity, a gap is formed between a panel, close to the main cavity, of the air inlet cavity and an air outlet of the air generator; the air bag further comprises inner pull belts arranged on the two panels of the main cavity, the main cavity is divided into an upper cavity and a lower cavity communicated with the air inlet cavity through the inner pull belts, through holes are formed in the inner pull belts, or the inner pull belts are matched with the two panels of the main cavity to form an air inlet channel, so that the lower cavity is unfolded earlier than the upper cavity. The air flow direction is limited through the inner pull belt, the rigidity of the lower cavity can be improved, then the convex hull and the lower edge part of the lower cavity are matched to limit the air bag, and the problem that an existing air bag is prone to swing after being unfolded is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive safety components, and particularly to an airbag and a seat airbag device. Background Art

[0002] A central airbag is generally installed in a seat and is used to inflate and break through a seat tear line to deploy between an automotive center console and a driver's / passenger's seat during a collision event, so as to protect both the driver and the passenger simultaneously. For example, it buffers the shoulders and heads of the driver and the passenger to protect them.

[0003] After the existing central airbag is deployed, the bottom end of the central airbag lacks pulling and fixing, resulting in the central airbag shaking after deployment, such as shaking back and forth or left and right, thus reducing the protection ability of the central airbag for the occupants. In addition, after the gas generator of the existing central airbag is detonated, the central airbag is directly filled. The middle and lower parts of the central airbag deploy slowly and have a relatively short pressure holding time, and the supporting ability for the occupants is weak.

[0004] Based on this, a new technical solution is needed. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide an airbag and a seat airbag device to at least solve the problems that the existing central airbag is unstable after deployment and has a weak supporting ability for the occupants.

[0006] Embodiments of the present invention provide the following technical solutions:

[0007] Embodiments of the present invention provide an airbag, including a main airbag. The main airbag includes a main cavity and an intake cavity. The intake cavity extends outward from the main cavity. When a gas generator is installed in the intake cavity, there is a gap between the panel of the intake cavity close to the main cavity and the gas outlet of the gas generator.

[0008] The airbag further includes inner pull belts provided on two panels of the main cavity. The inner pull belts divide the main cavity into an upper cavity and a lower cavity communicating with the intake cavity, and through holes are provided on the inner pull belts or the inner pull belts cooperate with the two panels of the main cavity to form an intake channel, so that the lower cavity deploys before the upper cavity.

[0009] When the main airbag is installed in a seat and inflated and deployed, under the action of the inflation of the gas generator and the restriction of the seat tear line, the panel corresponding to the gas outlet of the gas generator forms a convex bulge inside the seat tear line, and the lower edge part of the lower cavity extends between the automotive center console and the occupant's buttocks.

[0010] Further, the main airbag includes two main panels and two air inlet panels. One end of each air inlet panel is connected to the edge of the corresponding main panel, and the other end extends outward from the main panel.

[0011] Among them, after the two main panels and the two air inlet panels overlap and sew the edges correspondingly, the main airbag is formed.

[0012] Further, the outer edge of the air inlet panel is located on the side of the main panel away from its middle part. The outer edge of the air inlet panel is inclined and transitioned with the outer edge of the main panel through a transition section, and the transition section is correspondingly arranged with the air outlet of the gas generator.

[0013] Further, the main airbag further includes a pull belt panel, and the pull belt panel is connected to the edge of the main panel.

[0014] Further, a plurality of through holes are spaced on the inner pull belt, and the through holes are used to allow the gas entering the lower cavity part to enter the upper cavity.

[0015] Further, the plurality of through holes are sewn by pre-sewing threads;

[0016] Among them, after the lower cavity is inflated to a preset strength, the pre-sewing threads break, allowing the gas to enter the upper cavity.

[0017] Further, the thickness of the upper cavity is less than the thickness of the lower cavity; and / or

[0018] The upper cavity corresponds to the neck and the area above the neck of the seat occupant, and the lower cavity corresponds to the shoulders and the area below the shoulders of the occupant.

[0019] Further, an extension part is provided on one of the main panels. After the extension part on the main panel is folded and overlaps with the other main panel and the edges are sewn, the main airbag is formed;

[0020] Among them, when the main airbag is inflated, the extension part on the main panel unfolds to form a folding package, and the folding package is located on the side of the upper cavity close to the co-pilot, the side of the lower cavity close to the co-pilot, the side of the lower cavity close to the driver, or the side of the upper cavity close to the driver.

[0021] Further, the two main panels and the two air inlet panels are integrally connected.

[0022] The present invention also provides a seat airbag device, including:

[0023] An airbag as described in any one of the above;

[0024] A gas generator, which is installed in the air inlet cavity of the airbag, and there is a gap between the air outlet of the gas generator and the panel of the air inlet cavity close to the main cavity of the airbag.

[0025] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of the present invention at least include:

[0026] An airbag of the present invention has a gap between the panel of the air inlet cavity close to the main cavity and the air outlet of the gas generator. When the gas generator is detonated, a convex bulge is formed at one end of the air inlet cavity close to the main cavity under the restriction of the seat tear line, so as to limit the position of the airbag and prevent the airbag from swaying or shaking.

[0027] Furthermore, through the inner pull belt, the lower cavity is first filled and the stiffness of the lower cavity is increased. At the same time, when the airbag is detonated, by extending the lower edge of the lower cavity between the vehicle console and the occupant's buttocks, the vehicle console and the occupant's buttocks limit the lower edge part of the lower cavity. Therefore, when the stiffness of the lower cavity is increased and the lower edge of the lower cavity is limited, the lower cavity can remain stable, so that the entire airbag remains stable, solving the problems of the existing center airbag being unstable after deployment and having weak support ability for the occupant. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 A side view of an airbag according to an embodiment of the present invention;

[0030] Figure 2 A sectional view of an airbag according to an embodiment of the present invention;

[0031] Figure 3 A fabric structure diagram of an airbag according to an embodiment of the present invention;

[0032] Figure 4 A schematic structural diagram of an airbag with an extension part according to an embodiment of the present invention;

[0033] Figure 5 A schematic structural diagram of the folded extension part of an airbag according to an embodiment of the present invention;

[0034] Figure 6 A sectional view of a seat airbag device according to an embodiment of the present invention installed on a seat.

[0035] The reference numerals of the present invention are as follows:

[0036] 10, main airbag; 11, main cavity; 111, upper cavity; 112, lower cavity; 12, intake cavity; 13, convex hull; 14, inner pull belt; 141, through hole; 15, main panel; 16, intake panel; 17, transition section; 18, extension part; 19, pull belt panel;

[0037] 20, gas generator. Specific embodiments

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0040] It should be noted that the following description relates to various aspects of the embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0041] It should also be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The drawings only show the components related to the present application, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in its actual implementation can be an arbitrary change, and the component layout type may also be more complex.

[0042] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0043] After the central airbag deploys, the gas quickly rushes to the top of the central airbag, causing the central airbag to deploy rapidly. However, as the size of the central airbag increases and the number of chambers increases, after the central airbag is inflated and deployed, the lower part has lower stiffness and a short support time.

[0044] Based on the problem that the existing central airbag will sway after or during deployment and the weak support capacity of the middle and lower parts after deployment, the embodiment of this specification proposes a solution: Figure 1 As shown, an airbag of the present invention forms a convex bulge 13 on the inner side of the tear line of the seat when inflated, and limits the time for gas to enter the upper cavity 111 through the inner drawstring 14, ensuring that the lower cavity 112 is filled first and the inflation time of the lower cavity 112 is extended, while making the lower cavity 112 have sufficient rigidity. Therefore, with the lower edge of the lower cavity 112 supported by the car center console and the occupant's buttocks, the side of the lower cavity 112 forms a convex bulge 13 on the inner side of the tear line under the action of the gas generator 20, and the rigidity of the lower cavity 112 is increased, after the central airbag is inflated, the swaying of the airbag is reduced or avoided, thereby improving the protective ability of the central airbag to the occupant.

[0045] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0046] like Figures 1 to 6 As shown, an airbag provided by the present invention includes a main airbag 10, the main airbag 10 includes a main cavity 11 and an air inlet cavity 12, the air inlet cavity 12 extends outward from the main cavity 11, when a gas generator 20 is installed in the air inlet cavity 12, there is a gap between the panel of the air inlet cavity 12 close to the main cavity 11 and the air outlet of the gas generator 20; the airbag also includes an inner drawstring 14 provided on the two panels of the main cavity 11, the inner drawstring 14 divides the main cavity 11 into an upper cavity 111 and a lower cavity 112 connected to the air inlet cavity 12, A through hole 141 is provided on the inner pull strap 14, or the inner pull strap 14 cooperates with the two panels of the main cavity 11 to form an air intake channel, so that the lower cavity 112 is deployed before the upper cavity 111; when the main airbag 10 is installed in the seat and is inflated and deployed, under the limiting effect of the inflation of the gas generator 20 and the tear line of the seat, the panel corresponding to the air outlet of the gas generator 20 forms a convex bump 13 on the inner side of the tear line of the seat, and the lower edge of the lower cavity 112 extends to between the center console of the car and the buttocks of the occupant to limit the left and right shaking of the main airbag 10.

[0047] The main airbag 10 is the area of ​​the airbag that bulges after being inflated, such as the main cavity 11 that plays a protective role and the air intake cavity 12 for installing the gas generator 20 and air intake.

[0048] Among them, the main airbag 10 protects at least the shoulders, hips, and head of the occupant. After being inflated, the main airbag 10 can be deployed from the side of the driver's or co-driver's seat and stand between the driver's and co-driver's seats.

[0049] Among them, after the gas generator 20 is installed in the intake cavity 12 and detonated, the main cavity 11 unfolds and breaks through the seat tear line. After the gas generator 20 impacts a part of the panel of the intake cavity 12 close to the main cavity 11, under the action of the seat tear line and the reserved space inside the seat, a convex bulge 13 is formed on the inner side of the cloth piece where the seat tear line is located for the airbag to be limited.

[0050] Among them, the volume of the upper cavity 111 is smaller than that of the lower cavity 112, and the upper cavity 111 mainly corresponds to the neck and the area above the neck of the seat occupant, while the lower cavity 112 corresponds to the shoulders and the area below the shoulders of the occupant, that is, the upper cavity 111 mainly protects the neck and neck area of the seat occupant, and the lower cavity 112 mainly protects the shoulders and the area below the shoulders of the occupant.

[0051] Among them, the thickness of the upper cavity 111 is smaller than that of the lower cavity 112, and the height of the upper cavity 111 is smaller than that of the lower cavity 112 to increase the buffer space and protection strength of the lower cavity 112.

[0052] Among them, the thicknesses of the upper cavity 111 and the lower cavity 112 refer to the thickness along the transverse distance of the vehicle after being installed in the vehicle.

[0053] Among them, when the gas generator 20 is inflated, the lower cavity 112 unfolds first, and the gas enters the upper cavity 111 through the through hole 141 or the intake passage. At the same time, the lower edge part of the lower cavity 112 is inflated and unfolded. Thus, when the airbag is impacted, the compression bending point thereof will be within the range covered by the lower cavity 112 according to the height of the center console, that is, the last part of the airbag maintains stiffness for a long time, so that when the occupant impacts the lower cavity 112, the lower cavity 112 can effectively resist the bending of the airbag, and the covering area of the lower cavity 112 is sufficient to control the excessive tilting of the main trunk of the occupant.

[0054] Among them, the head end of the gas generator 20 is inserted into the air intake cavity 12, and the tail end is located outside the air intake cavity 12. Moreover, the tail end of the gas generator 20 can be connected to the pull belt at the lower edge of the main air curtain, so that the gas generator 20 is obliquely arranged, facilitating the formation of a convex bulge 13 at the end of the air intake cavity 12 after detonation in cooperation with the seat tear line. And the gas generator 20 pulls out a transition area between the gas outlet of the gas generator 20 and the air inlet of the main cavity 11 at the upper end of the air intake cavity 12. The transition area can be understood as the parallel distance between the perpendicular bisector of the installed gas generator 20 and the extension line of the interference point between the main airbag 10 and the seat tear opening. The seat tear opening is located within this transition area. After the airbag is deployed, the convex bulge 13 formed by the interference between the upper end of the seat tear opening and the transition area restricts the airbag from shaking in the front and back directions.

[0055] In some of these embodiments, the main airbag 10 includes two main panels 15 and two air intake panels 16. One end of each air intake panel 16 is connected to the edge of the corresponding main panel 15, and the other end extends outward from the main panel 15. Among them, after the two main panels 15 and the two air intake panels 16 are correspondingly overlapped and their edges are sewn, the main airbag 10 is formed.

[0056] Among them, the shape of the main panel 15 can be flexibly set according to the required cavity shape.

[0057] Among them, the air intake panel 16 can be a rectangular panel.

[0058] Furthermore, the outer edge of the air intake panel 16 is located on the side of the main panel 15 away from its middle part. The outer edge of the air intake panel 16 is obliquely transitioned with the outer edge of the main panel 15 through a transition section 17, and the transition section 17 is correspondingly arranged with the gas outlet of the gas generator 20. Among them, the air intake cavity 12 is located at the edge of the main cavity 11 and extends outward, and the gas generator 20 is inserted into the air intake cavity 12.

[0059] Among them, the outer edge of the air intake panel 16 protrudes from the outer edge of the main panel 15.

[0060] Among them, the transition section 17 of the air intake panel 16 forms a convex bulge 13 inside the seat tear line when the gas generator 20 is inflated.

[0061] Among them, by arranging an inner pull belt 14 in the main cavity 11, the gas can quickly flow into the lower cavity 112 and then flow into the upper cavity 111 through the through hole 141 or the air intake channel, so that the lower cavity 112 can first maintain sufficient stiffness and extend the inflation time of the lower cavity 112, enabling the lower cavity 112 to maintain sufficient stiffness within a certain period of time.

[0062] Among them, the inner drawstring 14 can retard the unfolding speed of the upper cavity 111, so that the lower cavity 112 unfolds first to support the area below the occupant's shoulders, reducing the offset of the occupant's head.

[0063] Among them, the inner drawstring 14 and the two panels of the main cavity 11 cooperate to form an air intake channel, which means that a part of the inner drawstring 14 is connected to the panel of the main cavity 11 to form an air intake channel; or the length of the inner drawstring 14 is shorter than the length of the main cavity 11 to form air intake channels on both sides.

[0064] In some of the embodiments, a plurality of through holes 141 are provided at intervals on the inner drawstring 14, and the through holes 141 are used to allow the gas entering the lower cavity 112 to enter the upper cavity 111.

[0065] Among them, the size and quantity of the through holes 141 can be set as required, such as three, five, etc. The aperture of the through holes 141 can be 20 - 30 mm.

[0066] Among them, the sizes of the through holes 141 can be set differently, so that different parts of the airbag unfold at different speeds, which is beneficial to obtaining a favorable cavity unfolding posture and unfolding moment.

[0067] Further, a plurality of through holes 141 are sewn with pre - stitches; among them, after the lower cavity 112 is inflated to a preset strength, the pre - stitches break, allowing the gas to enter the upper cavity 111, so as to increase the inflation time and gas volume of the lower cavity 112, thereby increasing the internal pressure of the lower cavity 112, making the lower cavity 112 more conducive to buffering occupants with a heavier mass.

[0068] Among them, the strength of the pre - stitches is relatively low. When the lower cavity 112 is full or nearly full, the pre - stitches break, allowing the gas to quickly enter the upper cavity 111 through the through holes 141.

[0069] In some of the embodiments, the main airbag 10 further includes a drawstring panel, and the drawstring panel is connected to the edge of the main panel 15.

[0070] Among them, the drawstring panel can be used to connect to the tail end of the gas generator 20 or the seat frame.

[0071] In some of the embodiments, an extension part 18 is provided on one main panel 15. After the extension part 18 on the main panel 15 is folded and overlapped with the other main panel 15 and sewn at the edges, the main airbag 10 is formed; when the main airbag 10 is inflated, the extension part 18 on the main panel 15 unfolds to form a folded package, and the folded package is located on one side of the upper cavity 111 close to the co - pilot, one side of the lower cavity 112 close to the co - pilot, one side of the lower cavity 112 close to the driver, or one side of the upper cavity 111 close to the driver.

[0072] Among them, the folding package is used to protect the shoulders or heads of the co-driver or the driver.

[0073] Among them, the folding package bulges to one side to form a protruding portion extending outward, so as to increase the supporting ability of the airbag. Such as supporting the head of the driver or co-driver, the shoulders or hips of the driver or co-driver, etc.

[0074] Among them, the folding package is arranged on the side of the lower cavity 112 close to the co-driver, so that the folding package can support with the center console to further enhance the bending resistance of the airbag.

[0075] Among them, the folding package is arranged in the upper cavity 111, which can increase the thickness of the upper cavity 111 unfolded in the Y direction and further enhance the support between the driver and the co-driver.

[0076] In some embodiments, the two main panels 15 and the two air inlet panels 16 are integrally connected. At this time, the sewing process is to fold the integrally cut piece in half, sew from the split of the two panels of the cloth piece along the edge to the edge of the drawstring, sew the periphery of the drawstring to the panel of the main airbag 10, and then sew along the outer periphery of the split of the two panels to the lowest edge of the air inlet passage. This edge is a single-layer pressed line transition, and then sew along the outer periphery until the split of the two panels and stop at the end of the folded edge.

[0077] Furthermore, the lengths of the two air inlet panels 16 are different, and the longer one and a half are the single-layer pressed line edges during one-piece sewing.

[0078] Furthermore, silicone or elastic sealing strips can be added at the sewing line to increase the airtightness of the airbag and delay the pressure retention time of the cavity.

[0079] After the airbag of the present invention is inflated, the inner drawstring 14 first causes the lower cavity 112 to unfold first and increases the stiffness of the lower cavity 112, and then a convex bulge 13 is formed inside the seat tear line to limit the side part of the airbag and prevent the airbag from swinging left and right; extend the lower edge part of the lower cavity 112 between the car center console and the occupant's hip to limit the bottom of the airbag and prevent the airbag from swinging back and forth, thereby improving the protection ability and protection strength of the airbag and reducing the displacement of the occupant's head; in addition, by increasing the stiffness and inflation time of the lower cavity 112, the protection strength and protection time for the occupant are also improved.

[0080] The present invention can make full use of the functions of the center console and the co-driver seat, support the torso of the occupant by increasing the thickness of the lower cavity 112 and raising the inner teeth, and finally reduce the head offset; in addition, the present invention can also distribute the limited inflation area at the most needed positions, improving the protection ability for the occupant.

[0081] After the airbag of the present invention is deployed, by setting the number and aperture size of the through holes 141 of the inner drawstring 14, the thickness of the lower edge part of the lower cavity 112, and the convex hull 13 formed on the side of the lower cavity 112, the lower cavity 112 can be restricted in three places after the gas generator 20 is inflated, so that the lower cavity 112 maintains stiffness for a long time, achieving the self-standing property of the single-chamber distal airbag.

[0082] The manufacturing process of the airbag of the present invention is simple. It only needs one cavity piece and one inner drawstring 14 piece to form. After the cavity piece is folded in half, the inner drawstring 14 piece is sewn in, and then the periphery of the cavity is sewn to complete the manufacturing. The sewing line is short, the deflation area is small; the base cloth area of the piece is very small; the volume after folding is very small, and it is easy to be assembled into the seat; the manufacturing process is simple and the mass production cost is low.

[0083] As Figure 6 shown, the present invention also provides a seat airbag device, including the airbag and the gas generator 20 described in any one of the above. The gas generator 20 is installed in the air inlet cavity 12 of the airbag, and there is a gap between the air outlet of the gas generator 20 and the panel of the air inlet cavity 12 close to the main airbag cavity 11.

[0084] In this specification, the same or similar parts between various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the descriptions are relatively simple, and the relevant parts can refer to the partial descriptions of the system embodiments.

[0085] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An airbag, characterized in that, Comprising a main airbag, the main airbag includes a main cavity and an air inlet cavity, the air inlet cavity extends outward from the main cavity, and when a gas generator is installed in the air inlet cavity, there is a gap between the panel of the air inlet cavity close to the main cavity and the air outlet of the gas generator; The airbag further includes inner pull straps provided on two panels of the main cavity, the inner pull straps divide the main cavity into an upper cavity and a lower cavity communicating with the air inlet cavity, and through holes are provided on the inner pull straps or the inner pull straps cooperate with the two panels of the main cavity to form an air inlet passage, so that the lower cavity unfolds prior to the upper cavity; When the main airbag is installed in a seat and inflated and deployed, under the inflation of the gas generator and the restricting action of the seat tear line, a convex bulge is formed on the panel corresponding to the air outlet of the gas generator inside the seat tear line, and the lower edge portion of the lower cavity extends between the automotive center console and the occupant's buttocks.

2. The airbag according to claim 1, characterized in that, The main airbag includes two main panels and two air inlet panels, one end of each air inlet panel is connected to the edge of the corresponding main panel, and the other end extends outward from the main panel; Wherein, after the two main panels and the two air inlet panels are overlapped and sewn at their edges, the main airbag is formed.

3. The airbag according to claim 2, wherein The outer edge of the air inlet panel is located on one side of the main panel away from its middle part, and the outer edge of the air inlet panel is inclined and transitioned with the outer edge of the main panel through a transition section, and the transition section is correspondingly arranged with the air outlet of the gas generator.

4. The airbag according to claim 2, wherein The main airbag further includes a pull strap panel, and the pull strap panel is connected to the edge of the main panel.

5. The airbag according to claim 1, characterized in that, A plurality of through holes are provided at intervals on the inner pull strap, and the through holes are used for allowing the gas entering the lower cavity part to enter the upper cavity.

6. The airbag according to claim 5, characterized in that, The plurality of through holes are sewn with pre-sewing threads; Wherein, after the lower cavity is inflated to a preset strength, the pre-sewing threads break, so that the gas enters the upper cavity.

7. The airbag according to claim 1, wherein The thickness of the upper cavity is less than the thickness of the lower cavity; and / or The upper cavity corresponds to the neck and the area above the neck of the seat occupant, and the lower cavity corresponds to the shoulders and the area below the shoulders of the occupant.

8. The airbag according to claim 2, wherein, An extension part is provided on one of the main panels, and after the extension part on the main panel is folded and overlapped with the other main panel and sewn at the edges, the main airbag is formed; Wherein, when the main airbag is inflated, the extension part on the main panel unfolds to form a folded package, and the folded package is located on one side of the upper cavity close to the co-pilot, one side of the lower cavity close to the co-pilot, one side of the lower cavity close to the driver, or one side of the upper cavity close to the driver.

9. The airbag according to claim 2, characterized in that, The two main panels and the two air inlet panels are integrally connected.

10. A seat airbag device, characterized in that, Comprising: The airbag according to any one of claims 1 to 9; A gas generator, the gas generator is installed in the air inlet cavity of the airbag, and there is a gap between the air outlet of the gas generator and the panel of the air inlet cavity close to the main cavity of the airbag.

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