Airbag

Abstract

An airbag for a vehicle, the airbag comprising: a main chamber piece (710), wherein left and right sides of the main chamber piece (710) respectively extend outwards and are connected to bulge portions (720), the bulge portions (720) are configured to expand during inflation, the main chamber piece (710) forms a main airbag cushion (730) by means of folding and sewing, and the main airbag cushion (730) is in communication with the bulge portions (720); the two bulge portions (720) are configured, when the airbag is inflated for expansion, to protrude outwards relative to the main airbag cushion (730) and extend towards a passenger to be protected, such that the two bulge portions (720) are respectively located on two sides of the head of said passenger, thereby laterally limiting the head of said passenger to prevent his / her head from moving out of the airbag; and the main airbag cushion (730) is configured to come into contact with the head, neck and chest areas of said passenger when the airbag is inflated for expansion. Such an airbag can better prevent the head of the passenger from sliding out of the airbag, thereby better preventing the head of the passenger from deviating from the airbag and otherwise causing collision injury to the neck or head.

Description

An airbag

[0001] This application claims priority to Chinese Patent Application No. 2024115949643, filed on November 8, 2024, entitled "An Airbag", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of automotive parts technology, and in particular to an airbag. Background Technology

[0003] Airbags enhance passenger safety by rapidly inflating in the event of a collision, providing additional protection. An airbag typically consists of a bag-shaped or spherical inflatable bag. Upon impact, the bag expands to a spherical shape, cushioning the impact and protecting the occupant. However, in collisions, especially tilt-and-roll or offset collisions, the occupant's head may slip out of the airbag and collide with other structures within the vehicle, such as the center console screen, doors, or A-pillars. This head movement can cause the occupant's head to slip out of the airbag, resulting in neck or head injuries. Summary of the Invention

[0004] The purpose of this application is to provide an airbag that can better prevent the occupant's head from slipping out of the airbag, thereby better avoiding neck or head collision injuries caused by the occupant's head deviating from the airbag.

[0005] The specific plan is as follows:

[0006] In a first aspect, this application provides an airbag, comprising:

[0007] The main cavity sheet has protruding parts extending outward from its left and right sides, which are used to expand when inflated. The main cavity sheet is folded and sewn to form a main air bag, which is connected to the protruding parts.

[0008] The two protrusions are used to protrude outward relative to the main airbag and extend toward the occupant to be protected when the airbag is inflated, so that the two protrusions are respectively located on both sides of the head of the occupant to be protected, thereby limiting the head of the occupant to the left and right and preventing the head from moving out of the airbag. The main airbag is used to contact the head, neck and chest of the occupant to be protected when it is inflated.

[0009] Optionally, irregular cavity pieces extend outward from the left and right sides of the main cavity piece and are connected to it. The irregular cavity pieces are stacked and sewn along the edges to form the convex portion.

[0010] Optionally, the irregular cavity piece is a one-piece molded structure, the irregular cavity piece and the main cavity piece are integrally molded structures, and the irregular cavity piece is formed by folding and sewing along the edge to form the convex part.

[0011] Optionally, the irregular cavity piece includes a first irregular cavity piece and a second irregular cavity piece;

[0012] The first irregular cavity piece extends outward and connects to the main cavity piece. The first irregular cavity piece and the main cavity piece are integrally formed. The second irregular cavity piece is stacked with the first irregular cavity piece and sewn together along the edge to form the convex part.

[0013] Optionally, the convex portion is folded inward from the root relative to the main cavity piece to overlap with the main cavity piece. The main cavity piece forms a folded main air bag by overlapping. The folded main air bag is sewn along the edge by an outer sewing structure to form the main air bag. The convex portion overlapping the main cavity piece is sewn together with the main cavity piece by the outer sewing structure, so that the outer sewing structure forms an internal sewing thread for the convex portion.

[0014] The built-in sewing thread is used to apply inward restraint to the bulge when the airbag is inflated, so that the bulge converges inward and extends toward the occupant to be protected.

[0015] Optionally, the airbag further includes a first auxiliary cavity and a second auxiliary cavity, the first auxiliary cavity and the second auxiliary cavity being sewn together with the main cavity to form the main airbag, the main cavity being used to form a first portion of the main airbag that contacts the head, neck and chest of the occupant to be protected, and the first auxiliary cavity and the second auxiliary cavity being used to form a second portion of the main airbag excluding the first portion and the convex portion.

[0016] Optionally, the second part includes at least one of the side portion of the main air bag, the mounting portion of the main air bag, and the protruding portion of the main air bag.

[0017] Optionally, the main cavity plate has a vertically symmetrical left-right structure, and the irregularly shaped cavity plates on the left and right sides of the main cavity plate are symmetrically arranged along the vertical centerline of the main cavity plate.

[0018] Optionally, when the airbag inflates, the two protrusions form a V-shaped or horn-shaped structure with the main airbag.

[0019] Secondly, this application also provides a vehicle including the airbag described in any of the first aspects.

[0020] Compared with the prior art, this application has the following advantages:

[0021] The airbag provided in this application includes a main cavity panel. Protrusions extend outward from both the left and right sides of the main cavity panel, and these protrusions expand during inflation. The main cavity panel can be folded and sewn to form a main airbag. Since the main airbag is connected to the protrusions, air can be inflated into the main airbag when the airbag needs to be deployed, causing the air in the main airbag to flow to the protrusions, allowing both the main airbag and the protrusions to inflate simultaneously. The two protrusions located on the left and right sides of the main cavity panel protrude outward relative to the main airbag and extend towards the occupant to be protected during airbag inflation, so that the two protrusions are located on either side of the occupant's head, thereby limiting the occupant's head to the left and right and preventing the head from moving out of the airbag. The main airbag is designed to contact the head, neck, and chest area of ​​the occupant during inflation.

[0022] As can be seen, when the airbag provided in this application inflates, it can extend two protrusions toward the occupant on the main airbag. These two protrusions are located on both sides of the occupant's head, thereby preventing the occupant's head from slipping out of the airbag and better avoiding neck or head collision injuries caused by the occupant's head deviating from the airbag.

[0023] In addition, this application connects the convex parts to both sides of the main cavity piece, which makes it easier to set two convex parts on the main airbag. The structure is simple and easy to sew, which makes it easier to sew and produce airbags. Attached Figure Description

[0024] Figure 1 is a structural schematic diagram of an example of a car provided in an embodiment of this application.

[0025] Figure 2 is a schematic diagram of an example of an airbag provided in an embodiment of this application, wherein (a) in Figure 2 is a perspective view and (b) in Figure 2 is a left view of (a).

[0026] Figure 3 is a schematic diagram of the connection structure between the main cavity plate and the convex part of the airbag provided in the embodiment of this application.

[0027] Figure 4 is an example of the unfolded cavity of an airbag provided in an embodiment of this application.

[0028] Figure 5 is a schematic diagram of the connection structure between the main cavity sheet and the irregular cavity sheet of the airbag provided in the embodiment of this application.

[0029] Figure 6 is a structural schematic diagram of the manufacturing process of an airbag provided in an embodiment of this application.

[0030] Figure 7 is a schematic diagram of the structure of an airbag composed of the airbag cavities shown in Figure 4.

[0031] Figure 8 is a diagram showing the unfolded cavity of an airbag according to an embodiment of this application.

[0032] Figure 9 is a schematic diagram of the structure of an airbag composed of the airbag cavities shown in Figure 8.

[0033] In the diagram, 1. Windshield; 2. Instrument panel; 4. Roof; 5. Sun visor; 6. Module housing; 7. Airbag; 710. Main cavity panel; 711. Third folding structure line; 720. Protrusion; 721. Irregularly shaped cavity panel; 721a. First irregularly shaped cavity panel; 721b. Second irregularly shaped cavity panel; 722. Irregularly shaped cavity stitching structure; 730. Main airbag; 732. Outer stitching structure; 733. Second pull strap; 741. First auxiliary cavity panel; 741a. First stitching structure; 741b. First folding structure line; 742. Second auxiliary cavity panel; 742a. ​​Second stitching structure; 742b. Second folding structure line; 750. Gas generator; 760. Folding airbag; 8. Occupant to be protected. Detailed Implementation

[0034] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] Airbags enhance the safety of vehicle occupants by rapidly inflating during a collision, providing additional protection. An airbag typically consists of an inflatable, bundle-like or spherical airbag. Upon impact, the airbag expands to a spherical shape, cushioning the impact and protecting the occupants. However, in collisions, especially tilt-and-roll or offset collisions, the occupant's head may slip out of the airbag and collide with other structures within the vehicle, such as the center console screen, doors, or A-pillars. This head movement can cause the occupant's head to slip out of the airbag, resulting in neck or head injuries.

[0038] In view of this, this application provides an airbag and a car, the provided airbag can better prevent the head of the occupant 8 from sliding out of the airbag, thereby better avoiding neck or head collision injuries caused by the head of the occupant 8 deviating from the airbag.

[0039] The airbag provided in this application will now be described in detail with reference to the accompanying drawings.

[0040] As shown in Figures 1 to 9, the airbag provided in this application embodiment includes a main cavity sheet 710. The left and right sides of the main cavity sheet 710 are respectively connected to protrusions 720. The protrusions 720 are used to expand when inflated. The main cavity sheet 710 is folded and sewn to form a main air bag 730. The main air bag 730 is connected to the protrusions 720.

[0041] Two protrusions 720 are used to protrude outward relative to the main airbag 730 and extend toward the occupant 8 to be protected when the airbag is inflated, so that the two protrusions 720 are respectively located on both sides of the head of the occupant 8 to be protected, thereby limiting the head of the occupant 8 to the left and right and preventing the head from moving out of the airbag. The main airbag 730 is used to contact the head, neck and chest of the occupant 8 to be protected when it is inflated.

[0042] The aforementioned main cavity piece 710 can be a long strip structure, a square structure, an irregular shape, or any other structure capable of forming the main airbag 730 through sewing. The main cavity piece 710 can be a single piece of fabric or a piece of fabric spliced ​​together and sewn together. This application does not specifically limit this; those skilled in the art can design the specific structure of the main cavity piece 710 according to the specific structure of the airbag. To facilitate airbag sewing, the main cavity piece 710 can be set as a long strip structure so that it can better surround and form the main airbag 730.

[0043] In this embodiment of the application, the main airbag 730 can be formed simply by folding and sewing the main cavity piece 710. Specifically, when the structure of the main airbag 730 is relatively simple and can be easily formed by folding the main cavity piece 710, the airbag can be formed simply by folding and sewing the main cavity piece 710.

[0044] In practical applications, the structure of the main airbag 730 formed by folding and sewing a single main cavity piece 710 is limited in shape and may not be able to form the required airbag shape. Furthermore, it is not easy to sew the main airbag 730 from a single main cavity piece 710; it often requires complex folding and sewing, and the resulting main airbag 730 may have poor flatness and excessive sewing allowance. Therefore, to facilitate the formation of the required airbag structure and to make the sewn airbag flatter and reduce sewing allowance, in one embodiment, as shown in Figures 2, 4, and 8, the airbag may further include auxiliary cavity pieces (the auxiliary cavity pieces in the figures include a first auxiliary cavity piece 741 and a second auxiliary cavity piece 742). The auxiliary cavity pieces are sewn together with the main cavity piece 710 to form the main airbag 730. The main cavity piece 710 forms the first part of the main airbag 730 that contacts the head, neck, and chest area of ​​the occupant 8 to be protected. The auxiliary cavity pieces form the second part of the main airbag 730, excluding the first part and the protruding portion 720. The specific structure of the auxiliary cavity piece and its connection method with the main cavity piece 710 can be set according to the specific structure of the main airbag 730, and are not specifically limited in this application. In the embodiments of this application, the auxiliary cavity piece can be sewn to both the main cavity piece 710 and the protrusion 720, or it can be sewn to only the main cavity piece 710. The specific connection method is set according to the specific structure of the airbag.

[0045] The second part may include at least one of the following: the side portion of the main airbag 730, the mounting portion of the main airbag 730, and the extension portion of the main airbag 730, but is not limited thereto. As shown in Figures 8 and 9, the second part formed by the auxiliary cavity plate is the side portion of the main airbag 730. As shown in Figures 4 and 7, the second part formed by the auxiliary cavity plate is the mounting portion and the extension portion of the main airbag 730. The mounting portion is the part of the airbag used for installation on the vehicle. The mounting portion may be provided with a gas generator 750, mounting components, etc., so that the airbag can be installed in the vehicle through the mounting components and the airbag can be inflated by the gas generator 750. The extension portion is used to extend the airbag toward the occupant 8. When the airbag is installed on the roof or in other positions that are not directly facing the occupant 8, the extension portion needs to be provided so that the airbag can be extended to the occupant 8 through bending and extension. In this embodiment, the auxiliary cavity forms the side portion, mounting portion, or protruding portion of the main airbag 730, which makes it easier for the airbag as a whole to meet different shape requirements and improves the structural flexibility of airbag manufacturing.

[0046] In one specific embodiment, as shown in Figures 2, 4, and 8, the auxiliary cavity piece may include a first auxiliary cavity piece 741 and a second auxiliary cavity piece 742. The first auxiliary cavity piece 741 and the second auxiliary cavity piece 742 are respectively sewn to the main cavity piece 710 to form the main air bag 730.

[0047] The first auxiliary cavity 741 and the second auxiliary cavity 742 can be two cavities with the same shape and size, or they can be cavities with different shapes and sizes. The specific shape can be set according to the actual structure of the airbag, and this application does not specifically limit it.

[0048] When the second part is the side portion of the main airbag 730, as shown in Figures 8 and 9, the first auxiliary cavity piece 741 and the second auxiliary cavity piece 742 are used to form the left and right sides of the main airbag 730, so that the airbag can form a fuller structure. When the second part is the mounting portion or the extension portion of the main airbag 730, as shown in Figures 4 and 7, the first auxiliary cavity piece 741 and the second auxiliary cavity piece 742 are used to form the two airbag surfaces of the mounting portion and the extension portion of the main airbag 730, respectively. The two airbag surfaces are stacked and sewn together to form a bag-shaped structure, thereby making it easier to form the airbag portions corresponding to the mounting portion and the extension portion.

[0049] The aforementioned protruding portion 720 has a bag-like structure, enabling it to expand during inflation. The protruding portion 720 can be integrally formed with the main cavity plate 710, or it can be sewn onto the main cavity plate 710 using a stitching structure. When expanded, the protruding portion 720 can be a columnar protrusion, an irregularly shaped protrusion, a long strip protrusion, or other protruding structures; this application does not specifically limit this. The protruding portions 720 on the left and right sides of the main cavity plate 710 can have the same structure or different structures.

[0050] The protruding portion 720 can be a one-piece molded bag-like structure, or it can be a bag-like structure formed by sewing together one or more cavity pieces. For example, as shown in Figure 4(c), the left and right sides of the main cavity piece 710 can each extend outwards and be connected to irregularly shaped cavity pieces 721. The irregularly shaped cavity pieces 721 are stacked and sewn along the edges by the irregularly shaped cavity stitching structure 722 to form the aforementioned protruding portion 720. That is, the protruding portion 720 is formed by sewing together the irregularly shaped cavity pieces 721. Specifically, the aforementioned irregularly shaped cavity pieces 721 can be folded in half and then sewn along the edges to form a bag-like protruding portion 720. The irregularly shaped cavity pieces 721 can be a one-piece molded structure with the main cavity piece 710, or the irregularly shaped cavity pieces 721 can be sewn together with the main cavity piece 710. When the convex portion 720 is an integrally molded bag-shaped structure, the sewing process can be reduced and the airbag manufacturing efficiency can be improved. When the convex portion 720 is a bag-shaped structure formed by sewing together one or more cavity pieces, the airbag manufacturing process can be simplified. Those skilled in the art can flexibly choose the forming method of the convex portion 720 and the specific form of the irregular cavity piece 721 according to actual needs. This application does not specifically limit the specific form.

[0051] The irregularly shaped cavity 721 can be a one-piece molded structure or formed by sewing together multiple cavity pieces. When the irregularly shaped cavity 721 is a one-piece molded structure, as shown in Figure 4, the irregularly shaped cavity 721 can be folded in half and sewn along the edges to form the aforementioned protrusion 720. The irregularly shaped cavity 721 can be axially symmetrical or asymmetrical. This application does not limit the specific shape. The one-piece molded structure can reduce sewing, making the overall structure of the airbag flatter and improving manufacturing efficiency.

[0052] Optionally, when the irregular cavity piece 721 is formed by sewing together multiple cavity pieces, as shown in Figures 5 and 8, the irregular cavity piece 721 may include a first irregular cavity piece 721a and a second irregular cavity piece 721b. The first irregular cavity piece 721a is connected to the main cavity piece 710. The first irregular cavity piece 721a and the main cavity piece 710 can be integrally formed, or the first irregular cavity piece 721a can be sewn together with the main cavity piece 710. The second irregular cavity piece 721b is stacked on top of the first irregular cavity piece 721a and sewn together along the edges to form a protruding portion 720. By stacking and sewing together multiple cavity pieces, protruding portions 720 with diverse structures can be formed.

[0053] Optionally, the main cavity piece 710 can be a vertically symmetrical structure, and the irregularly shaped cavity pieces 721 on both sides of the main cavity piece 710 can be symmetrically arranged along the vertical center line of the main cavity piece 710 to form a symmetrical airbag structure, making the airbag structure more regular and the sewing of the airbag simpler and more convenient. Alternatively, the main cavity piece 710 can also be a vertically asymmetrical structure, and the irregularly shaped cavity pieces 721 on both sides of the main cavity piece 710 can also be asymmetrically arranged along the vertical center line of the main cavity piece 710. Those skilled in the art can flexibly set the arrangement, and this application does not specifically limit it.

[0054] The convex portion 720 is connected to the main air bag 730. The convex portion 720 and the main air bag 730 are connected so that the convex portion 720 and the main air bag 730 can be inflated and expanded simultaneously by a gas generator 750.

[0055] When the airbag inflates, the two protrusions 720 can extend outward toward the occupant 8 to be protected. Specifically, they can extend directly toward the occupant 8, forming a U-shaped structure with the main airbag 730 during inflating. Alternatively, the two protrusions can extend obliquely toward the occupant 8, forming a V-shape or a bull's horn shape with the main airbag 730 during inflating. The specific structure can be set according to the actual situation. When the protrusions 720 extend obliquely toward the occupant 8, they can apply an inward oblique guiding force to the occupant 8's head, allowing the protrusions 720 to better confine the occupant 8's head between the two protrusions.

[0056] In one embodiment, a first pull strap may be provided inside the main airbag 730. One end of the first pull strap is connected to the root of the protrusion 720, and the other end is connected to the main airbag 730. The first pull strap is used to pull the root of the protrusion 720 inward when the airbag inflates, so that the root of the protrusion 720 contracts inward to maintain the shape of the protrusion 720, preventing the edges of the protrusion 720 and the main airbag 730 from being too smooth and not protruding significantly relative to the main airbag 730, so that the two protrusions are concave inward, thereby effectively blocking the user's head.

[0057] In another embodiment, as shown in Figures 3 and 6, the convex portion 720 can be folded inward from its root relative to the main cavity piece 710 to overlap with it. The main cavity piece 710 forms a folded air bag 760 through this overlap. The folded air bag 760 is sewn along its edges by an outer perimeter stitching structure 732 to form the aforementioned main air bag 730. The convex portion 720, overlapped with the main cavity piece 710, is sewn together with the main cavity piece 710 through the outer perimeter stitching structure 732. The outer stitching structure 732 forms an internal sewing thread around the convex portion 720. This internal sewing thread applies inward restraint to the convex portion 720 during airbag inflation, providing sufficient support to the bottom of the convex portion 720 to maintain its convex shape. This prevents the edges of the convex portion 720 and the main airbag 730 from becoming too rounded and thus not protruding significantly relative to the main airbag 730, ensuring the airbag deploys stably according to the desired shape and effectively blocks the user's head. In this embodiment, even without a pull strap, the convex portion maintains a stable shape and indents inward between the two convex portions, effectively blocking the user's head.

[0058] In this embodiment, the convex portion 720 can be folded inside the main air bag 730 or folded outside the main air bag 730 to achieve stacking with the folded air bag 760.

[0059] The airbag provided in this application includes a main cavity panel 710, with protrusions 720 extending outward from the left and right sides of the main cavity panel 710. The protrusions 720 can expand when inflated. The main cavity panel 710 can form a main airbag 730 by folding and sewing. Since the main airbag 730 is connected to the protrusions 720, the main airbag 730 can be inflated when the airbag needs to be deployed, so that the air in the main airbag 730 flows to the protrusions 720, allowing the main airbag 730 and the protrusions 720 to inflate simultaneously. The two protrusions 720 located on the left and right sides of the main cavity 710 are used to protrude outward relative to the main airbag 730 and extend towards the occupant 8 to be protected when the airbag is inflated, so that the two protrusions 720 are respectively located on both sides of the head of the occupant 8 to be protected, thereby limiting the head of the occupant 8 to the left and right and preventing the head from moving out of the airbag. The main airbag 730 is used to contact the head, neck and chest of the occupant 8 to be protected when it is inflated.

[0060] As can be seen, when the airbag provided in this application inflates, it can extend two protrusions 720 toward the occupant 8 on the main airbag 730. These two protrusions are located on both sides of the occupant 8's head, thereby preventing the occupant 8's head from slipping out of the airbag and better avoiding neck or head collision injuries caused by the occupant 8's head deviating from the airbag.

[0061] In addition, this application connects the convex portion 720 to both sides of the main cavity piece 710, so there is no need to make structural improvements to the auxiliary cavity pieces (such as the first auxiliary cavity piece 741 and the second auxiliary cavity piece 742 mentioned above). It is easier to set two convex portions 720 on the main air bag 730. The structure is simple and easy to sew, which makes it easier to sew and produce airbags.

[0062] The airbag provided in this application can be a roof-mounted airbag installed on the fourth panel of the roof, a front-mounted airbag installed in front of the steering wheel, front panel, or other seats, a side-mounted airbag installed on the side of the seat, or an airbag installed in other positions. This application does not specifically limit the airbag.

[0063] In one embodiment, a second pull strap 733 may be provided inside the main airbag 730. Both ends of the second pull strap 733 are connected inside the main airbag 730, and each end is connected to two opposite surfaces of the main airbag 730. For example, one end of the second pull strap 733 is connected to the connection between the main cavity plate 710 and the first auxiliary cavity plate 741, and the other end is connected to the connection between the main cavity plate 710 and the second auxiliary cavity plate 742. When the airbag is inflated, the second pull strap 733 unfolds along with the expansion of the main airbag 730. The second pull strap 733 is used to control the unfolding shape of the main airbag 730, ensuring that the main airbag 730 is positioned at the head and chest position of the front occupant 8 after inflation, thereby protecting the head and chest position of the front occupant 8 and further improving the protection of the front occupant 8.

[0064] In one specific embodiment, when the airbag is a top-mounted airbag, the first auxiliary cavity 741 and the second auxiliary cavity 742 can be used to form the mounting portion and the extension portion of the top-mounted airbag.

[0065] The following is a specific example illustrating the method for manufacturing the airbag provided in this application. As shown in Figure 6, this application also provides a method for manufacturing an airbag, which includes steps 1 to 6.

[0066] Step 1: Fold the convex portions 720 on both sides of the main cavity plate 710 inward.

[0067] The effect of folding the convex hull 720 inward is shown in Figure 6(a).

[0068] Step 2: Stack the first auxiliary cavity piece 741 and the main cavity piece 710 together and sew them together using the first sewing structure 741a.

[0069] The effect of stacking and sewing the first auxiliary cavity piece 741 and the main cavity piece 710 together is shown in Figure 6(b).

[0070] Step 3: The first auxiliary cavity plate 741 is folded outward along the first folding structure line 741b.

[0071] The first auxiliary cavity plate 741 is provided with a first folding structure line 741b. The effect of the first auxiliary cavity plate 741 folding outward along the first folding structure line 741b is shown in Figure 6(c).

[0072] Step 4: The second auxiliary cavity piece 742 is stacked with the first auxiliary cavity piece 741 and the main cavity piece 710 obtained in step 3 and sewn together through the second sewing structure 742a.

[0073] The effect of the second auxiliary cavity piece 742 being sewn together with the combined body through the second sewing structure 742a is shown in Figure 6(d).

[0074] Step 5: The second auxiliary cavity piece 742 folds outward along the second folding structure line 742b, and the main cavity piece 710 folds along the third folding structure line 711 to obtain the folded air bag 760.

[0075] The second auxiliary cavity plate 742 is provided with a second folding structure line 742b, and the main cavity plate 710 is provided with a third folding structure line 711. The effect of the second auxiliary cavity plate 742 folding outward along the second folding structure line 742b is shown in Figure 6(e), and the effect of the main cavity plate 710 folding along the third folding structure line 711 is shown in Figure 6(f).

[0076] Step 6: The folded air bag 760 obtained in Step 5 is closed and fixed together with the main cavity piece 710 by the outer periphery sewing structure. The convex portion 720 stacked on the main cavity piece 710 is sewn together with the main cavity piece 710 by the outer periphery sewing structure 732, so that the outer periphery sewing structure 732 forms an internal sewing line for the convex portion 720.

[0077] The structure after suturing in step 6 is shown in Figure 6(g). After suturing in step 6, the airbag has a folded structure. After inflation, the airbag unfolds to form the unfolded structure shown in Figure 7.

[0078] This application also provides a vehicle including the airbag described in any of the preceding claims. Referring to Figure 1, the vehicle includes a windshield 1, an instrument panel 2, a roof, a roof 4, and a sun visor 5. The windshield 1 and the instrument panel have a certain angle between them. The roof is fixedly connected to the top of the windshield 1. The sun visor 5 is rotatably connected to the bottom surface of the roof 4. A gap is provided between the roof 4 and the roof, and a module housing 6 is installed within the gap. An airbag is installed within the module housing 6. When the vehicle collides, the airbag inflates and deploys from the module housing 6, protecting the head and chest of the front passenger 8, thereby reducing the injury to the front passenger 8.

[0079] Furthermore, to facilitate airbag deployment, a weakening line is provided at the end of the roof 4 near the windshield 1. When the airbag inflates and deploys, the front end of the roof 4 folds along the weakening line, thereby facilitating airbag deployment and allowing the airbag to further envelop the front occupants 8. In this embodiment, the weakening line can be composed of a groove along the width of the roof 4. In other embodiments, it can also be composed of several through holes evenly spaced along the width of the roof 4, as long as it facilitates the folding of the roof 4 along the weakening line.

[0080] The airbag also includes a gas generator 750 located inside the main airbag 730. One end of the gas generator 750 extends out of the main airbag 730 and is fixedly connected to the module housing 6 by bolts. When the car is involved in a collision, the gas generator 750 operates to inflate the main airbag, causing the main airbag and the bulge 720 to expand, thereby enveloping the front passenger 8 and reducing the possibility of the front passenger 8 being thrown forward and hitting the windshield 1 or dashboard due to the impact of the car.

[0081] It should be noted that although several structures, components, or units for implementing the relevant functions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the specific embodiments of this application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided and embodied by multiple components, structures, or units.

[0082] Furthermore, although the various components of the components or apparatus in this application and the mounting arrangements between them are described in a specific order in the accompanying drawings, this does not require or imply that the components or apparatus must be designed according to that specific component or mounting arrangement, or that all the components shown must be included to achieve the desired result. Additional or alternative components may be omitted, multiple components may be combined into one component to achieve the corresponding function, and / or a component may be decomposed into multiple components to achieve the corresponding function, etc.

[0083] Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

Claims

1. An airbag, characterized in that, include: The main cavity plate (710) has protrusions (720) extending outward from its left and right sides, respectively. The protrusions (720) are used to expand when inflated. The main cavity plate (710) is folded and sewn to form a main air bag (730), and the main air bag (730) is connected to the protrusions (720). The two protrusions (720) are used to protrude outward relative to the main airbag (730) and extend toward the occupant to be protected when the airbag is inflated, so that the two protrusions (720) are respectively located on both sides of the head of the occupant to be protected, thereby limiting the head of the occupant to be protected to the left and right and preventing the head from moving out of the airbag. The main airbag (730) is used to contact the head, neck and chest of the occupant to be protected when it is inflated.

2. The airbag according to claim 1, characterized in that, The main cavity piece (710) has irregular cavity pieces (721) extending outward from its left and right sides respectively. The irregular cavity pieces (721) are formed by stacking and sewing along the edges to form the convex part (720).

3. The airbag according to claim 2, characterized in that, The irregular cavity piece (721) is a one-piece molded structure. The irregular cavity piece (721) and the main cavity piece (710) are integrally molded structures. The irregular cavity piece (721) is formed by folding and sewing along the edge to form the convex part (720).

4. The airbag according to claim 2, characterized in that, The irregular cavity piece (721) includes a first irregular cavity piece (721a) and a second irregular cavity piece (721b); The first irregular cavity piece (721a) is connected to the main cavity piece (710). The first irregular cavity piece (721a) and the main cavity piece (710) are integrally formed. The second irregular cavity piece (721b) is stacked with the first irregular cavity piece (721a) and sewn together along the edge to form the convex part (720).

5. The airbag according to any one of claims 1 to 4, characterized in that, The convex portion (720) is folded inward from the root relative to the main cavity piece (710) to overlap with the main cavity piece (710). The main cavity piece (710) forms a folded air bag (760) by overlapping. The folded air bag (760) is sewn along the edge by a sewing structure to form the main air bag (730). The convex portion (720) overlapping the main cavity piece (710) is sewn together with the main cavity piece (710) by the outer sewing structure (732) so that the outer sewing structure (732) forms an internal sewing thread for the convex portion (720). The built-in sewing thread is used to apply inward restraint to the root of the convex portion (720) when the airbag is inflated, so that the convex portion (720) maintains its convex shape.

6. The airbag according to any one of claims 1 to 4, characterized in that, The airbag also includes an auxiliary cavity, which is sewn to the main cavity (710) to form the main airbag (730). The main cavity (710) forms a first part of the main airbag (730) that contacts the head, neck and chest of the occupant to be protected. The auxiliary cavity forms a second part of the main airbag (730) excluding the first part and the convex portion (720).

7. The airbag according to claim 6, characterized in that, The second part includes at least one of the side portion of the main air bag (730), the mounting portion of the main air bag (730), and the protruding portion of the main air bag (730).

8. The airbag according to claim 7, characterized in that, The auxiliary cavity includes a first auxiliary cavity (741) and a second auxiliary cavity (742), the first auxiliary cavity (741) and the second auxiliary cavity (742) being sewn to the main cavity (710) to form the main air bag (730); When the second part is the side part of the main air bag (730), the first auxiliary cavity plate (741) and the second auxiliary cavity plate (742) are respectively used to form the left and right sides of the main air bag (730).

9. The airbag according to claim 2, characterized in that, The main cavity plate (710) is a vertically symmetrical or asymmetrical structure, and the irregular cavity plates (721) on the left and right sides of the main cavity plate (710) are symmetrically arranged along the vertical center line of the main cavity plate (710).

10. The airbag according to any one of claims 1 to 4, characterized in that, When the airbag is inflated, the two protrusions (720) and the main airbag (730) form a V-shaped or horn-shaped structure.

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