Vehicle seat air bag and vehicle

Abstract

The embodiment of the invention provides a vehicle seat air bag and a vehicle, the seat air bag is installed on the side portion of any one of a main driver seat and a co-driver seat and is unfolded between the main driver seat and the co-driver seat, the seat air bag comprises a main cavity and an auxiliary cavity, and the main cavity is provided with a non-inflation area and an external drawstring. One end of the auxiliary cavity is fixed to the main cavity through a connecting section provided with a communicating hole, when the seat air bag is inflated and unfolded, under traction of an external pull belt, the main cavity is bent in a non-inflation area to form an upper cavity body and a lower cavity body, and the upper cavity body and the lower cavity body extend at an angle. A rear end portion higher than the shoulder of the passenger and a front end portion lower than the shoulder of the passenger are formed on the lower contour surface of the upper cavity. After the seat air bag is inflated and unfolded, the end, close to a passenger, of the upper cavity of the main cavity is higher than the shoulder of the passenger, and the end, away from the passenger, of the upper cavity of the main cavity is lower than the shoulder of the passenger, so that a slope low in front and high in rear is formed on the lower contour surface of the upper cavity, the restraint effect on the shoulder of the passenger is improved, and the passenger is prevented from moving towards the front of the vehicle.

Description

Technical Field

[0001] This specification relates to the technical field of vehicle safety, and particularly to a vehicle seat airbag and a vehicle. Background Art

[0002] The seat side airbag can be deployed on the side of the seat when the vehicle is laterally impacted, so as to protect the occupant. Currently, the general seat side airbag can only protect the occupant from the side. When the vehicle is obliquely impacted, the occupant has a tendency to move forward in the vehicle, and it is difficult for the seat side airbag to play a good protective role. Summary of the Invention

[0003] In view of this, the embodiments of this specification provide a vehicle seat airbag and a vehicle. When the seat airbag is inflated and deployed, a main cavity and a secondary cavity are formed. The upper cavity of the main cavity is higher than the occupant's shoulder at the end close to the occupant and lower than the occupant's shoulder at the end far from the occupant, so that the lower contour surface of the upper cavity forms a slope that is lower in the front and higher in the rear, thereby increasing the restraint effect on the occupant's shoulder and avoiding the tendency of the occupant to move forward in the vehicle.

[0004] The embodiments of this specification provide the following technical solutions: A vehicle seat airbag is installed on the side of either the driver's seat or the front passenger seat and deployed between the two. It includes a main cavity and a secondary cavity. The main cavity is provided with a non-inflatable area and an external strap. One end of the secondary cavity is fixed to the main cavity through a connecting section provided with a communication hole.

[0005] When the seat airbag is inflated and deployed, the secondary cavity unfolds in a direction away from the main cavity. Under the traction of the external strap, the main cavity is bent at the non-inflatable area to form an upper cavity and a lower cavity that extend at an angle to each other. The lower contour surface of the upper cavity forms a rear end higher than the occupant's shoulder and a front end lower than the occupant's shoulder. The front end is used to restrain the forward or obliquely forward displacement of the occupant during a vehicle collision.

[0006] Preferably, the lower contour surface of the upper cavity forms an angle a with the horizontal direction.

[0007] Preferably, the external pull straps include a first pull strap and a second pull strap respectively disposed on opposite sides of the main cavity. Both ends of the first pull strap and the second pull strap are connected to the main cavity, and a first upper connection end, a first lower connection end, a second upper connection end, and a second lower connection end of the pull straps are formed on the main cavity. The distance between the first upper connection end and the first lower connection end and the distance between the second upper connection end and the second lower connection end are respectively less than the lengths of the first pull strap and the second pull strap. The upper cavity portion near the first pull strap forms the front end portion, and the upper cavity portion near the second pull strap forms the rear end portion.

[0008] Preferably, the non-inflatable area extends in the vehicle's front-rear direction. The first upper connection end and the second upper connection end are symmetrically arranged, the first lower connection end and the second lower connection end are symmetrically arranged, and the length of the first pull strap is less than the length of the second pull strap.

[0009] Preferably, the non-inflatable area extends in the vehicle's front-rear direction. The first pull strap and the second pull strap are of equal length. The first upper connection end and the second upper connection end are symmetrically arranged, and the distance between the first lower connection end and the first upper connection end is less than the distance between the second lower connection end and the second upper connection end.

[0010] Preferably, the main cavity is formed by sewing the edges of a first panel and a second panel along a first outer peripheral line. The distance between the first upper connection end and the first outer peripheral line is greater than the distance between the second upper connection end and the first outer peripheral line.

[0011] Preferably, the first outer peripheral line forms a first arc-shaped corner near the first upper connection end and a second arc-shaped corner near the second upper connection end at the top of the main cavity. The curvature of the first arc-shaped corner is less than the curvature of the second arc-shaped corner.

[0012] Preferably, the included angle a is 5 - 20°.

[0013] Preferably, the auxiliary cavity includes a third panel, which is configured to be formed by folding the third panel in half and sewing it along a second outer peripheral line. The connection section includes a closed seam and a communication hole, and the non-inflatable area is located within the projection area of the closed seam.

[0014] A vehicle includes a driver's seat, a passenger seat, a gas generator, and a seat airbag as described in any one of the above. The gas generator and the seat airbag are both installed on one side of the driver's seat close to the passenger seat or one side of the passenger seat close to the driver's seat, and the gas outlet of the gas generator is in communication with the main cavity.

[0015] 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 this specification at least include:

[0016] When the seat airbag inflates and deploys, a main cavity and a secondary cavity are formed. The main cavity bends along the non-inflated area under the traction of an external pull belt. The main cavity is divided into an upper cavity and a lower cavity through the bending area. One end of the upper cavity close to the occupant is higher than the occupant's shoulder, and the end far from the occupant is lower than the occupant's shoulder, so that the lower contour surface of the upper cavity forms a slope that is lower in the front and higher in the rear, thereby increasing the restraint effect on the occupant's shoulder and avoiding the tendency of the occupant to move forward in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use 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.

[0018] Figure 1 is a schematic diagram when the front side of the vehicle is obliquely impacted;

[0019] Figure 2 is a diagram showing the change in the restraint of the occupant after the vehicle seat airbag provided by the present application is deployed;

[0020] Figure 3 is a schematic structural diagram of the first perspective after the vehicle seat airbag provided by the present application is deployed;

[0021] Figure 4 is a schematic structural diagram of the second perspective after the vehicle seat airbag provided by the present application is deployed;

[0022] Figure 5 is a schematic diagram after the main cavity of the vehicle seat airbag provided by the present application is sewn;

[0023] Figure 6 is a schematic diagram after the secondary cavity of the vehicle seat airbag provided by the present application is sewn.

[0024] In the figure, 1 is the main cavity; 101 is the first panel; 102 is the second panel; 2 is the auxiliary cavity; 201 is the third panel; 3 is the upper cavity; 4 is the lower cavity; 5 is the first drawstring; 6 is the second drawstring; 7 is the front end; 8 is the rear end; 9 is the upper connection end of the first drawstring; 10 is the lower connection end of the first drawstring; 11 is the upper connection end of the second drawstring; 12 is the lower connection end of the second drawstring; 13 is the connection section; 1301 is the closed suture; 14 is the non-inflatable area; 1401 is the closed suture; 15 is the communication hole; 16 is the first arc corner; 17 is the second arc corner; 18 is the first outer peripheral line; 19 is the second outer peripheral line. Detailed implementation mode

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] The following uses specific specific examples to illustrate the implementation modes 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 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 modes. The 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 creative efforts belong to the scope protected by the present application.

[0027] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious 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.

[0028] It also needs to 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 and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be an arbitrary change, and the component layout type may also be more complex.

[0029] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0030] As Figure 1 shown, when a vehicle collides within the impact angle A range, the co-driver will move in the opposite direction of the impact. If this movement is decomposed, the co-driver will have a movement along the front of the vehicle and a movement along the side of the vehicle. Currently, the general seat side airbag can only protect the occupant from the side. When the occupant has a tendency to move forward in the vehicle, the seat side airbag is difficult to provide good protection.

[0031] The following describes the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

[0032] As Figures 2 - 6 shown, a vehicle seat airbag is installed on either side of the driver's seat and the co-driver's seat and deployed between them, including a main cavity 1 and a sub-cavity 2. The main cavity 1 is provided with a non-inflatable area 14 and an external strap. One end of the sub-cavity 2 is fixed to the main cavity 1 through a connecting section 13 provided with a communication hole 15.

[0033] When the seat airbag is inflated and deployed, the sub-cavity 2 unfolds away from the main cavity 1. Under the traction of the external strap, the main cavity 1 bends at the non-inflatable area 14 to form an upper cavity 3 and a lower cavity 4 extending at an angle to each other. The lower contour surface of the upper cavity 3 forms a rear end 8 higher than the occupant's shoulder and a front end 7 lower than the occupant's shoulder. The front end 7 is used to restrict the forward or obliquely forward displacement of the occupant during a vehicle collision.

[0034] By providing a non-inflatable area 14 and an external strap on the main cavity 1, when the seat airbag is inflated and deployed, under the action of the external strap, the main cavity 1 bends at the non-inflatable area 14, and the main cavity 1 forms an upper cavity 3 and a lower cavity 4 along the bending area. One end of the lower contour surface of the upper cavity 3 close to the occupant is higher than the occupant's shoulder, and the end far from the occupant is lower than the occupant's shoulder. When the vehicle is impacted within the impact angle A range, the co-driver will not only have a tendency to move closer to the driver's seat, but also have a tendency to move forward in the vehicle. When the occupant moves forward, since one end of the lower contour surface of the upper cavity 3 close to the occupant is higher than the occupant's shoulder, the occupant will move forward a certain distance. Since the end of the lower contour surface of the upper cavity 3 far from the occupant is lower than the occupant's shoulder, when the occupant moves a certain distance, the occupant's shoulder will necessarily come into contact with the lower contour surface of the upper cavity 3. As the occupant moves forward, the occupant's shoulder will be restricted by the front end 7 of the upper cavity 3, thereby achieving the effect of restricting and protecting the occupant.

[0035] As Figures 2 - 3 shown, in some embodiments, the lower contour surface of the upper cavity 3 forms an angle a with the horizontal direction. Along the direction away from the vehicle seat backrest, the distance between the lower contour surface of the upper cavity 3 and the seat cushion gradually decreases, and the lower contour surface of the upper cavity 3 forms a ramp with a lower front and a higher rear. As the forward movement distance of the occupant increases, the restraint of the upper cavity 3 on the occupant's shoulder gradually becomes stronger, ensuring the protection effect on the occupant.

[0036] It should be noted that, in other embodiments, a protrusion lower than the occupant's shoulder can also be formed at the front end portion 7 of the lower contour surface of the upper cavity 3 to restrain the occupant.

[0037] As Figures 2 - 6 shown, in some embodiments, the outer strap includes a first strap 5 and a second strap 6 respectively disposed on opposite sides of the main cavity 1. Both ends of the first strap 5 and the second strap 6 are connected to the main cavity 1. On the main cavity 1, a first upper connection end 9, a first lower connection end 10, a second upper connection end 11, and a second lower connection end 12 are formed. The distance between the first upper connection end 9 and the first lower connection end 10 and the distance between the second upper connection end 11 and the second lower connection end 12 are respectively smaller than the lengths of the first strap 5 and the second strap 6. The portion of the upper cavity 3 near the first strap 5 forms the front end portion 7, and the portion of the upper cavity 3 near the second strap 6 forms the rear end portion 8. The first upper connection end 9 and the first lower connection end 10 respectively connected to the upper and lower ends of the first strap 5 are disposed on the first side of the main cavity 1 (i.e., the front side of the main cavity 1), and the second upper connection end 11 and the second lower connection end 12 respectively connected to the upper and lower ends of the second strap 6 are disposed on the second side of the main cavity 1 (i.e., the rear side of the main cavity 1). When the main cavity 1 is inflated and deployed, since the distance between the first upper connection end 9 and the first lower connection end 10 is smaller than the length of the first strap 5, and the distance between the second upper connection end 11 and the second lower connection end 12 is smaller than the length of the second strap 6, under the action of the first strap 5 and the second strap 6, the main cavity 1 will be pulled to bend along the non-inflated area 14.

[0038] There are at least the following two embodiments in forming the rear end portion 8 higher than the occupant's shoulder and the front end portion 7 lower than the occupant's shoulder on the lower contour surface of the upper cavity 3:

[0039] Embodiment 1, as Figures 2 - 6As shown, the non-inflatable area 14 extends in the vehicle's front-rear direction. The upper connecting end 9 of the first strap is symmetrically arranged with the upper connecting end 11 of the second strap. The lower connecting end 10 of the first strap is symmetrically arranged with the lower connecting end 12 of the second strap. The length of the first strap 5 is less than the length of the second strap 6. In this embodiment, the distance between the upper connecting end 9 and the lower connecting end 10 of the first strap is the same as the distance between the upper connecting end 11 and the lower connecting end 12 of the second strap, but the length of the first strap 5 is less than the length of the second strap 6, such that the degree of bending of the front side of the main cavity 1 pulled by the first strap 5 is greater than the degree of bending of the rear side of the main cavity 1 pulled by the second strap 6, thereby causing the front end portion 7 of the lower contour surface of the first cavity to be lower than its rear end portion 8. A slope is formed between the front end portion 7 and the rear end portion 8 of the first cavity to achieve forward restraint of the occupant.

[0040] Embodiment 2: The non-inflatable area 14 extends in the vehicle's front-rear direction. The first strap 5 and the second strap 6 are of equal length. The upper connecting end 9 of the first strap is symmetrically arranged with the upper connecting end 11 of the second strap. The distance between the lower connecting end 10 of the first strap and the upper connecting end 9 of the first strap is less than the distance between the lower connecting end 12 of the second strap and the upper connecting end 11 of the second strap. In this embodiment, the first strap 5 and the second strap 6 are of the same length, but the distance between the upper connecting end 9 and the lower connecting end 10 of the first strap is less than the distance between the upper connecting end 11 and the lower connecting end 12 of the second strap, and the upper connecting end 9 of the first strap and the upper connecting end 11 of the second strap are symmetrically distributed (i.e., the upper connecting end 9 of the first strap and the upper connecting end 11 of the second strap are at the same position height). In such a setting, when the main cavity 1 is inflated and deployed, the degree of bending of the front side of the main cavity 1 pulled by the first strap 5 will necessarily be greater than the degree of bending of the rear side of the main cavity 1 pulled by the second strap 6, thereby causing the front end portion 7 of the lower contour surface of the first cavity to be lower than its rear end portion 8.

[0041] As Figures 5 - 6As shown, in some embodiments, the main cavity 1 is formed by sewing the edges of a first panel 101 and a second panel 102 through a first outer peripheral line 18. The distance between the connecting end 9 of the first pull strap and the first outer peripheral line 18 is greater than the distance between the connecting end 11 of the second pull strap and the first outer peripheral line 18. By sewing the first panel 101 and the second panel 102 through the first outer peripheral line 18 to form the main cavity 1, the relatively large distance between the connecting end 9 of the first pull strap and the first outer peripheral line 18 results in a certain unsewn panel area between the first outer peripheral line 18 and the connecting end 9 of the first pull strap. When the main cavity 1 is inflated and expanded, the panel outside the first outer peripheral line 18 will not be inflated (i.e., the area between the first outer peripheral line 18 and the connecting end 9 of the first pull strap will not be inflated), which facilitates the first pull strap 5 to pull the main cavity 1 to bend without being affected by inflation and expansion, and makes it easier to keep the front end 7 at a lower position.

[0042] As Figures 5 - 6 shown, in some embodiments, the first outer peripheral line 18 forms a first arc-shaped corner 16 near the connecting end 9 of the first pull strap and a second arc-shaped corner 17 near the connecting end 11 of the second pull strap at the top of the main cavity 1. The curvature of the first arc-shaped corner 16 is less than the curvature of the second arc-shaped corner 17. The first outer peripheral line 18 forms the first arc-shaped corner 16 and the second arc-shaped corner 17 on both sides of the top respectively. The first arc-shaped corner 16 is on the side close to the first pull strap 5, and the second arc-shaped corner 17 is on the side close to the second pull strap 6. Moreover, the curvature of the first arc-shaped corner 16 is less than the curvature of the second arc-shaped corner 17. When the main cavity 1 is inflated and expanded, the part of the upper cavity 3 close to the second pull strap 6 will be more bulged, which is more conducive to raising the rear end 8 of the upper cavity 3 and making it higher than the part of the upper cavity 3 close to the first pull strap 5 (i.e., the front end 7 of the upper cavity 3). It should be noted that the radius of curvature of the first arc-shaped corner 6 is greater than that of the second arc-shaped corner 17, resulting in a relatively larger non-inflated area near the connecting end of the first pull strap, and the pulling effect on the first pull strap 5 is more obvious.

[0043] As Figure 3 shown, in some embodiments, the included angle a is 5 - 20°. The lower contour surface of the upper cavity 3 forms an included angle a with the horizontal direction between 5 - 20°. On the basis of ensuring that the upper cavity 3 can achieve good restraint on the occupant, it can also avoid excessive traction force of the main cavity 1 on the first pull strap 5 and ensure the connection effect between the first pull strap 5 and the main cavity 1.

[0044] As Figure 6As shown, in some embodiments, the secondary cavity 2 includes a third panel 201, which is configured to be formed by folding the third panel 201 in half and sewing it along the second outer periphery line 19. The connecting section 13 includes a closed seam 1301 and a communication hole 15. The non-inflatable area 14 is located within the projection area of the closed seam 1301. By using an independent third panel 201, the secondary cavity 2 is formed by folding the third panel 201 in half and sewing it along the second outer periphery line 19. The third panel 201 is connected to the main cavity 1 through the connecting section 13. The connecting section 13 is formed by the closed seam 1301. A closed seam 1401 is provided within the connecting section 13 to form the non-inflatable area 14. The closed seam 1401 stitches at least the first panel 101 and the second panel 102, facilitating the bending of the main cavity 1. A communication hole 15 is provided within the connecting section 13 to communicate the main cavity 1 and the secondary cavity 2, ensuring that the gas in the main cavity 1 can enter the secondary cavity 2 through the communication hole 15.

[0045] It should be noted that the communication hole 15 is located below the closed seam 1301, facilitating the rapid entry of the gas in the main cavity 1 into the secondary cavity 2.

[0046] Please refer to Figures 1 - 6 , based on the same inventive concept, an embodiment of this specification provides a vehicle, including a driver's seat, a passenger seat, a gas generator, and a seat airbag as described in any one of the above. The gas generator and the seat airbag are both installed on one side of the driver's seat close to the passenger seat or one side of the passenger seat close to the driver's seat. The gas outlet of the gas generator is in communication with the main cavity 1.

[0047] In practice, by using the above seat airbag, when the front side of the vehicle is obliquely impacted, the occupant starts to move obliquely forward in the opposite direction of the collision. The gas generator is detonated to inflate the main cavity 1. The main cavity inflates and unfolds. Under the action of the external strap, the main cavity 1 bends at the non-inflatable area 14 to form an upper cavity 3 and a lower cavity 4. There is a certain gap between the upper cavity 3 and the lower cavity 4. When the occupant moves obliquely forward, the shoulder will quickly get stuck in the gap between the upper cavity 3 and the lower cavity 4. One end of the lower contour surface of the upper cavity 3 close to the occupant is higher than the occupant's shoulder, and the end far from the occupant is lower than the occupant's shoulder. As the occupant moves, the occupant's shoulder contacts the lower contour surface of the upper cavity 3, and the upper cavity 3 provides a binding force to the occupant's shoulder to prevent the occupant from moving forward further, achieving the effect of protecting the occupant.

[0048] For the various embodiments in this specification, the same or similar parts can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is relatively simple, and the relevant parts can be referred to the description of the system embodiments.

[0049] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by 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. A vehicle seat airbag, installed on either side of a driver's seat or a passenger seat and deployed between the two, comprising a main cavity and a secondary cavity, wherein the main cavity is provided with a non-inflated area and an external drawstring, and one end of the secondary cavity is fixed to the main cavity through a connecting section provided with a connecting hole, characterized in that: When the seat airbag is inflated and deployed, the auxiliary cavity deploys in a direction away from the main cavity, and under the traction of the external pull strap, the main cavity is bent in the non-inflation area to form an upper cavity and a lower cavity extending at an angle to each other, and the lower contour surface of the upper cavity is formed with a rear end portion higher than the occupant's shoulders and a front end portion lower than the occupant's shoulders, and the front end portion is used to restrain the occupant's forward or oblique forward displacement during a vehicle collision.

2. The vehicle seat airbag according to claim 1, characterized in that: The lower contour surface of the upper cavity forms an angle a with the horizontal direction.

3. The vehicle seat airbag according to claim 2, characterized in that: The external draw strap includes a first draw strap and a second draw strap respectively arranged on opposite sides of the main cavity, both ends of the first draw strap and the second draw strap are connected to the main cavity, and a first draw strap upper connecting end, a first draw strap lower connecting end, a second draw strap upper connecting end and a second draw strap lower connecting end are formed on the main cavity, the distance between the first draw strap upper connecting end and the first draw strap lower connecting end and the distance between the second draw strap upper connecting end and the second draw strap lower connecting end are respectively smaller than the length of the first draw strap and the second draw strap, the upper cavity portion close to the first draw strap forms the front end portion, and the upper cavity portion close to the second draw strap forms the rear end portion.

4. The vehicle seat airbag according to claim 3, characterized in that: The non-inflatable area extends along the front-to-rear direction of the vehicle, the upper connecting end of the first pull strap is symmetrically arranged with the upper connecting end of the second pull strap, the lower connecting end of the first pull strap is symmetrically arranged with the lower connecting end of the second pull strap, and the length of the first pull strap is less than the length of the second pull strap.

5. The vehicle seat airbag according to claim 3, characterized in that: The non-inflatable area extends along the front-to-rear direction of the vehicle, the first pull strap and the second pull strap are of equal length, the upper connecting end of the first pull strap and the upper connecting end of the second pull strap are symmetrically arranged, and the distance between the lower connecting end of the first pull strap and the upper connecting end of the first pull strap is smaller than the distance between the lower connecting end of the second pull strap and the upper connecting end of the second pull strap.

6. The vehicle seat airbag according to any one of claims 3 to 5, characterized in that: The main cavity is formed by sewing the edges of the first panel and the second panel through the first outer peripheral line, and the distance between the upper connecting end of the first drawstring and the first outer peripheral line is greater than the distance between the upper connecting end of the second drawstring and the first outer peripheral line.

7. The vehicle seat airbag according to claim 6, characterized in that: The first outer periphery forms a first arc corner close to the upper connecting end of the first drawstring and a second arc corner close to the upper connecting end of the second drawstring at the top of the main cavity, and the curvature of the first arc corner is smaller than the curvature of the second arc corner.

8. The vehicle seat airbag according to claim 2, characterized in that: The angle a is 5-20°.

9. The vehicle seat airbag according to claim 7, characterized in that: The secondary cavity includes a third panel, which is configured to be formed by folding the third panel in half and sewing it through a second peripheral line. The connecting section includes a closed sealing seam and a connecting hole. The non-inflated area is located within the projection area of ​​the closed sealing seam.

10. A vehicle, characterized in that: It includes a main driver's seat, a co-pilot seat, a gas generator and a seat airbag as described in any one of claims 1 to 8, the gas generator and the seat airbag are both installed on the side of the main driver's seat close to the co-pilot seat or on the side of the co-pilot seat close to the main driver's seat, and the gas generator outlet is connected to the main cavity.

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