Vehicle seat side airbag, sewing method, and vehicle

Abstract

The embodiment of the present specification provides a seat side airbag, a sewing method and a vehicle. The side airbag comprises a bag body formed by sewing at least a first panel and a second panel along an edge, the bag body is configured to bend along a folding line extending in the front-rear direction of the vehicle when inflated, the first panel is folded in two along the folding line away from the second panel to form two layers of panels, and the two layers of panels are fixed at a preset distance from the folding line by a first seam, the part of the first panel between the folding line and the first seam is fixed to the second panel by a second seam, and the profile length of the first panel is less than the profile length of the second panel on the longitudinal section of the bag body at the position of the first seam. In the early stage of the collision, the bag can be quickly filled with gas to form a high-pressure area, quickly restrain the main driver and passenger, and prevent them from tilting sideways in the direction of the co-driver. The airbag only needs two panels to be sewn and folded to achieve the function, and the material cost is relatively low.

Description

Technical Field

[0001] This manual relates to the field of vehicle safety technology, specifically to a vehicle seat side airbag, a sewing method, and a vehicle. Background Technology

[0002] In the field of automotive safety, seat airbags, as important passive safety devices, play a crucial role in protecting the lives of occupants in collisions. Typically, seat airbags are installed on the inner side of the front seats, with the inner side of the driver's seat back being a common installation location. When a collision occurs and the airbag deploys, it provides support between the two seats, offering effective safety protection for the occupants and reducing injuries from the collision.

[0003] Currently, while airbags capable of simultaneously protecting both the driver and front passenger exist, they exhibit significant limitations in handling side impacts during practical applications. When a vehicle experiences a side impact, existing airbags simply deploy rapidly according to a pre-programmed sequence, lacking the ability to intelligently sense and adaptively adjust to the actual posture of the driver and front passenger. Specifically, in the initial stages of a side impact, to quickly and effectively protect the driver and front passenger, the airbag needs to inflate rapidly. This rapid inflation fills the main chamber, creating a high-pressure zone that quickly restrains the driver and front passenger, preventing them from tilting laterally towards the front passenger and thus avoiding secondary collisions with other vehicle components, reducing the severity of injury.

[0004] However, existing airbag manufacturing processes mostly use a method of sewing together multiple pieces of fabric to construct the airbag structure. This manufacturing method is not only complex, but also consumes a large amount of fabric material during production, resulting in high material costs. Summary of the Invention

[0005] In view of this, embodiments of this specification provide a vehicle seat side airbag, a sewing method, and a vehicle.

[0006] This specification provides the following technical solution through its embodiments: a vehicle seat side airbag, comprising a bag body formed by at least a first panel and a second panel along edge seams, the bag body being configured to bend along a fold line extending in the vehicle's longitudinal direction when inflated. The first panel is folded along the fold line away from the second panel to form two panels, and the two panels are fixed at a predetermined distance from the fold line by a first seam. The portion of the first panel between the fold line and the first seam is fixed to the second panel by a second seam. On the longitudinal section of the pouch body at the location of the first seam, the outline length of the first panel is less than the outline length of the second panel.

[0007] Preferably, the first seam and the fold line close to fix the two panels to form an internal air cavity, and the internal air cavity is connected to the main cavity of the bag body through a plurality of first air holes distributed on the first panel.

[0008] Preferably, the second seam is closed to form a locking area, which is used to restrict the expansion of a part of the area near the fold line during the initial inflation of the bag body. The internal air cavity has a triangular cross-section when the bag body is unfolded, and one of the vertices of the triangle is projected onto the fold line, so that the bag body bends along the fold line.

[0009] Preferably, the ratio of the lock zone height to the preset distance is 0.5 to 0.75.

[0010] Preferably, the locking zone is configured such that, after the pressure of gas in the bag body reaches a certain level, it enters the locking zone through the second seam. An exhaust hole is provided in the sewing area of ​​the second panel corresponding to the locking zone to discharge the gas in the locking zone and stabilize the bending angle of the bag body.

[0011] Preferably, the locking area is formed by a closed seam centered on the fold line, such that the locking area is divided along the center by the fold line, and the center of the vent hole is located on the fold line.

[0012] Preferably, the first stitch includes a straight section located at the preset distance and parallel to the fold line, and connecting sections located at both ends of the straight section and extending to the fold line.

[0013] Preferably, there are two sets of first air holes, located on the left and right sides of the locking area respectively, with two first air holes in each set, symmetrically arranged with respect to the fold line.

[0014] Preferably, the connecting segment is arc-shaped, and the distance between the intersections with the fold line is greater than the distance between the two sets of the first air holes.

[0015] A method for sewing a vehicle seat side airbag, used to manufacture a vehicle seat side airbag as described in any of the above claims, includes the following steps: The first panel and the second panel are sewn together to form a connecting area; Fold the upper panel down along the fold line of the first panel, and sew the first panel in half through the first seam to form an internal air cavity; The outer peripheries of the first and second panels are sewn together to form the main body of the pouch.

[0016] A vehicle equipped with a vehicle seat side airbag as described in any of the preceding claims.

[0017] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least: In the early stages of a collision, the airbag can quickly fill with gas, creating a high-pressure zone that rapidly restrains the driver and passenger, preventing them from tilting to the side towards the passenger seat, thus effectively protecting their safety. The airbag can be made by sewing and folding two panels together, resulting in low material costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the vehicle seat side airbag provided in this application when it is subjected to a side impact and then deploys; Figure 2 This is a schematic diagram of the vehicle seat side airbag sewing process provided in this application; Figure 3 This is a cross-sectional view of the vehicle seat side airbag after it has been sewn together, and at point AA, provided in this application; Figure 4 These are structural schematic diagrams of the vehicle seat side airbag provided in this application from different perspectives after deployment.

[0020] In the diagram, 1 is the first panel; 2 is the second panel; 3 is the first air vent; 4 is the exhaust vent; 5 is the locking area; 6 is the second seam; 7 is the fold line; 8 is the first seam; 9 is the main body of the pouch; 10 is the internal air cavity; h1 is the height of the locking area; h2 is the preset distance; L1 is the outline length of the second panel; L2 is the outline length of the first panel. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will 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 set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] Furthermore, specific details are provided in the following description 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.

[0026] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0027] like Figures 1-4 As shown, a vehicle seat side airbag includes a bag body 9 formed by at least a first panel 1 and a second panel 2 along an edge seam. The bag body 9 is configured to bend along a fold line 7 extending in the vehicle's longitudinal direction when inflated. The first panel 1 is folded along the fold line 7 away from the second panel 2 to form two panels, and the two panels are fixed at a preset distance h2 from the fold line 7 by a first seam 8. The portion of the first panel 1 between the fold line 7 and the first seam 8 is fixed to the second panel 2 by a second seam 6. On the longitudinal section of the pouch body 9 at the location of the first seam 8, the outline length L2 of the first panel is smaller than the outline length L1 of the second panel.

[0028] The main body 9 of the vehicle seat side airbag is formed by sewing a first panel 1 and a second panel 2 along the edge seam. The first panel 1 is folded in half along a transverse fold line 7 to form two panels, and is fixed by a first seam 8 at a predetermined distance h2 from the fold line 7. When the vehicle is involved in a side collision, the airbag can quickly fill with gas to form a high-pressure zone. The main body 9 of the airbag will bend along the fold line 7 extending in the front-rear direction of the vehicle. Since the outline length L2 of the first panel is less than the outline length L1 of the second panel, the bending method of the main body 9 of the airbag is preset so that the second panel 2 of the main body 9 of the airbag bends toward the first panel 1. That is, the main body 9 of the airbag unfolds in a specific direction (towards the driver and passenger) to protect the occupant in time during a collision.

[0029] The first panel 1 is folded along the fold line 7 away from the second panel 2 to form two panels. At a predetermined distance h2 from the fold line 7, the two panels are fixed by the first seam 8, so that the first panel 1 forms a specific structure in the folded area, which can unfold and bear force in a predetermined manner during inflation. At the same time, the part of the first panel 1 between the fold line 7 and the first seam 8 is fixed to the second panel 2 by the second seam 6, ensuring that all parts can work together during inflation.

[0030] It should be noted that the side airbag of this device is installed on the side of the seat back frame. The first panel 1 is the panel close to the occupant's side of the seat, and the second panel 2 is the panel away from the occupant's side of the seat. The bending of the main body 9 of the airbag means that part of the airbag extends towards the head of the occupant.

[0031] like Figures 2-3 As shown, in some embodiments, the first seam 8 and the fold line 7 are closed to fix the two panels to form an internal air cavity 10. The internal air cavity 10 is connected to the main cavity of the bag body 9 through a plurality of first air holes 3 distributed on the first panel 1.

[0032] The first seam 8 and the fold line 7 close together, fixing the two layers of panels formed by folding the first panel 1 in half. This creates a relatively independent space inside the main body 9 of the airbag, namely the internal air chamber 10. Several first air holes 3 distributed on the first panel 1 are used to connect the internal air chamber 10 with the main cavity of the main body 9 of the airbag. During the inflation process, the gas first enters the main cavity, causing the main cavity to quickly form a high-pressure zone. As inflation continues, the gas in the main cavity slowly flows into the internal air chamber 10 through these first air holes 3, realizing the phased flow of gas. By designing the internal air chamber 10 and the first air holes 3, the gas in the main cavity can be evenly distributed throughout the airbag, forming a uniform pressure state, which helps to stabilize the shape of the airbag, avoid local over-expansion or contraction, and improve the protective effect.

[0033] like Figures 2-3 As shown, the second seam 6 is closed and sewn to form a locking area 5, which is used to restrict the expansion of a part of the area near the fold line 7 during the initial inflation of the bag body 9. The internal air cavity 10 has a triangular cross-section when the bag body 9 is unfolded, and one of the vertices of the triangle is projected onto the fold line 7, so that the bag body 9 bends along the fold line 7.

[0034] The locking area 5 is formed by sealing the second seam 6. During the initial inflation of the airbag body 9, the locking area 5 restricts the expansion of a portion of the area near the fold line 7. When the airbag inflates, the locking area 5, through its tight stitching structure, temporarily prevents gas diffusion in that area, thus allowing the airbag to maintain a certain shape and structural stability during the initial inflation phase. This facilitates the bending of the airbag and allows the airbag body 9 to unfold in a predetermined manner, improving the protection for the occupant. The internal air cavity 10 has a triangular cross-section when the airbag body 9 unfolds, with one vertex of the triangle projected onto the fold line 7. The locking area 5, formed by the combination of the first panel 1 and the second panel 2, defines one side of the triangle, while the two layers of the first panel 1 within a predetermined distance define the other two sides. During the airbag inflation and unfolding process, due to the triangular structure and the positional relationship between the vertex and the fold line 7, when the gas pressure reaches a certain level, a bending force along the fold line 7 is generated on the airbag body 9, guiding the airbag body 9 to bend along the fold line 7. In addition, the bent-shaped main body of this structure has a certain rigidity, providing reaction force support after contact with the occupant.

[0035] like Figure 2 As shown, in some embodiments, the ratio of the lock zone height h1 to the preset distance h2 is 0.5 to 0.75.

[0036] The preset distance h2 refers to the distance between the first seam 8 and the fold line 7 when the first panel 1 is folded along the transverse fold line 7 and the two panels are fixed by the first seam 8. The locking area height h1 refers to the height of the area formed by the closing seam (i.e., the second seam 6).

[0037] When the main body 9 of the bladder is inflated, gas first enters the main cavity and quickly forms a high-pressure zone. As gas continues to be injected, the pressure inside the main cavity gradually increases, pushing the bladder outward. The locking zone 5, through its specific stitching structure and the ratio of its height to the preset distance h2, plays a crucial role in controlling the expansion shape of the bladder. By setting the ratio of the locking zone height h1 to the preset distance h2 within the range of 0.5 to 0.75, the bending angle of the bladder during inflation can be precisely controlled. This ratio range has been optimized to ensure that the bladder unfolds in the predetermined manner during inflation, providing the best protection for the occupant.

[0038] like Figures 2-4 As shown, in some embodiments, the locking zone 5 is configured such that, after the gas pressure inside the airbag body 9 reaches a certain level, it enters the locking zone 5 through the second seam 6. An exhaust port is provided on the second panel corresponding to the sewn area of ​​the locking zone to discharge the gas within the locking zone and stabilize the bending angle of the airbag body. When a side collision occurs, the airbag system is triggered, and gas rapidly inflates the airbag body 9, causing a sharp rise in pressure inside the airbag body 9. As the pressure continues to increase, when a certain preset threshold is reached, the gas pressure overcomes the resistance at the second seam 6, allowing the gas to seep into the locking zone 5 through the second seam 6 and finally be discharged through the exhaust port 4.

[0039] Vent holes 4 are provided on the second panel 2 corresponding to the sewing area of ​​the locking area 5. When gas enters the locking area 5, the gas can be discharged from the locking area 5 through the vent holes 4. This can prevent the locking area 5 from expanding due to excessive gas, thereby affecting the overall bending angle and stability of the bag body 9. It also avoids the impact of excessive expansion of the locking area 5 on the bending angle of the bag body 9.

[0040] like Figures 2-4 As shown, in some embodiments, the locking area 5 is formed by a closed seam centered on the fold line 7, such that the locking area 5 is divided along the center by the fold line 7, and the center of the vent 4 is located on the fold line 7. The second seam 6 of the locking area 5 is sewn along the fold line 7 to form a specific closed area. When the bag body 9 is inflated, the gas pressure gradually increases, and the locking area 5, through its seam structure, can initially limit the expansion of a portion of the area near the fold line 7, thus stabilizing the shape of the bag. At the same time, the center of the vent 4 is also located on the fold line 7, so that when the gas pressure in the locking area 5 reaches a certain level, the gas can be directly discharged from the vent 4 on the fold line 7.

[0041] Because the center of the suture in the locking zone 5 is located on the fold line 7, it allows for more precise control of the expansion in the area near the fold line 7. During the initial inflation phase of the pouch, this helps maintain the overall shape of the pouch and prevents instability caused by excessive local expansion. The center of the vent 4 is also located on the fold line 7, allowing gas in the locking zone 5 to escape quickly and directly from the vent 4 when pressure increases, preventing excessive expansion of the locking zone 5 due to high gas pressure, which could affect the overall bending angle and stability of the pouch body 9.

[0042] like Figures 2-4 As shown, in some embodiments, the fold line 7 extends along the front-rear direction of the vehicle, and the first seam 8 includes a straight section located at the preset distance h2 and parallel to the fold line 7, and connecting sections located at both ends of the straight section and extending to the fold line 7.

[0043] The fold line 7 is designed to extend along the front-to-back direction of the vehicle to match the geometry of the vehicle seats and occupants, ensuring that the airbag can deploy along the optimal path during inflation. The straight section is set at a preset distance h2 and is parallel to the fold line 7. Because the straight section is parallel to the fold line 7, it ensures that the internal air chamber 10 expands evenly along the direction of the fold line 7 during inflation. The connecting section is located at both ends of the straight section and extends to the fold line 7. The function of the connecting section is to connect the straight section and the fold line 7 together to form a complete seam structure.

[0044] like Figures 2-4 As shown, in some embodiments, the first air hole 3 is provided in two sets, located on the left and right sides of the locking area 5 respectively, with two first air holes 3 in each set, symmetrically arranged with respect to the fold line 7.

[0045] When the main body 9 of the bladder is inflated, the gas first enters the main cavity and quickly forms a high-pressure zone. As the gas continues to be inflated, the pressure inside the main cavity gradually increases. The gas flows into the inner air cavity 10 through the first vent 3. Since the first vent 3 is located on the left and right sides of the locking area 5 and is symmetrically arranged with respect to the fold line 7, the gas can flow evenly from the main cavity into the inner air cavity 10, avoiding excessively high or low local pressure. The symmetrical arrangement of the first vent 3 helps to form a uniform pressure distribution within the inner air cavity 10. When the gas flows into the inner air cavity 10 through the vent, the vents on both sides work simultaneously, allowing the pressure within the inner air cavity 10 to quickly reach a balanced state.

[0046] like Figures 2-3 As shown, in some embodiments, the connecting segment is arc-shaped, and the distance between its intersection with the fold line 7 is greater than the distance between the two sets of the first air holes 3. By setting the arc-shaped connecting segment, stress concentration under the bending shape of the bag can be effectively prevented, protecting the bag from tearing.

[0047] Based on the same inventive concept, such as Figures 2-4 As shown in the embodiments of this specification, a method for sewing a vehicle seat side airbag is provided for manufacturing a vehicle seat side airbag as described in any of the above claims, comprising the following steps: The first panel 1 and the second panel 2 are sewn together to form a connecting area. By sewing the first panel 1 and the second panel 2 together, an initial connecting structure is formed. This connecting area not only provides a sewing basis for subsequent steps, but also ensures the overall structural stability of the airbag device, and allows the airbag to bend along the connecting area during deployment. The upper panel of the first panel 1 is folded down along the fold line 7, and the first panel 1 is folded and sewn together through the first seam 8 to form an internal air cavity 10. Specifically, the upper part of the first panel 1 is folded down along the preset fold line 7, and then the folded part is folded and sewn together through the first seam 8 to form a closed air cavity inside the first panel 1. During the inflation of the airbag, the gas in the main cavity slowly enters the internal air cavity 10 through the first air holes 3 distributed on the first panel 1, so that the entire airbag forms a uniform pressure state in the later stage. By sewing the outer peripheries of the first panel 1 and the second panel 2 together, a closed pouch body 9 structure is formed.

[0048] Based on the same inventive concept, such as Figures 1-4 As shown in the embodiments of this specification, a vehicle is provided, equipped with a vehicle seat side airbag as described in any of the above claims. By employing the above airbag device, in the early stages of a collision, the airbag can rapidly inflate, forming a high-pressure zone that quickly restrains the driver and passenger, preventing them from tilting laterally towards the passenger side, thereby effectively protecting occupant safety. As gas continues to inflate, the pressure within the main chamber gradually increases, and the gas flows through the first air hole 3 into the internal air chamber 10, forming a pressure equalization state, which helps stabilize the shape of the airbag. This can be achieved by sewing only two panels together, resulting in low material costs.

[0049] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the method embodiments described later are relatively simple in description since they correspond to the system, and relevant parts can be referred to the descriptions in the system embodiments.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle seat side airbag comprising a bag body formed by at least a first panel and a second panel along an edge seam, the bag body being configured to bend along a fold line extending in the vehicle's longitudinal direction upon inflation, characterized in that, The first panel is folded along the fold line away from the second panel to form two panels, and the two panels are fixed at a predetermined distance from the fold line by a first seam. The portion of the first panel between the fold line and the first seam is fixed to the second panel by a second seam. On the longitudinal section of the pouch body at the location of the first seam, the outline length of the first panel is less than the outline length of the second panel.

2. The vehicle seat side airbag according to claim 1, characterized in that, The first suture and the fold line close to fix the two panels to form an internal air cavity, which is connected to the main cavity of the bag body through a number of first air holes distributed on the first panel.

3. The vehicle seat side airbag according to claim 2, characterized in that, The second suture is closed to form a locking area, which is used to restrict the expansion of a part of the area near the fold line during the initial inflation of the bag body. The internal air cavity has a triangular cross-section when the bag body is unfolded, and one of the vertices of the triangle is projected onto the fold line, so that the bag body bends along the fold line.

4. The vehicle seat side airbag according to claim 3, characterized in that, The ratio of the lock zone height to the preset distance is 0.5 to 0.

75.

5. The vehicle seat side airbag according to claim 3, characterized in that, The locking zone is configured such that when the pressure of gas inside the bag body reaches a certain level, it enters the locking zone through the second seam. An exhaust hole is provided in the sewing area of ​​the second panel corresponding to the locking zone to discharge the gas inside the locking zone and stabilize the bending angle of the bag body.

6. The vehicle seat side airbag according to claim 5, characterized in that, The locking area is formed by a closed seam centered on the fold line, such that the locking area is divided along the center by the fold line, and the center of the vent hole is located on the fold line.

7. The vehicle seat side airbag according to any one of claims 1-6, characterized in that, The first suture includes a straight section located at the preset distance and parallel to the fold line, and connecting sections located at both ends of the straight section and extending to the fold line.

8. The vehicle seat side airbag according to claim 6, characterized in that, The first air hole is provided in two sets, located on the left and right sides of the locking area respectively. Each set has two first air holes, which are symmetrically arranged with respect to the fold line. The connecting section is arc-shaped, and the distance between the intersections with the fold line is greater than the distance between the two sets of first air holes.

9. A method for sewing side airbags for vehicle seats, characterized in that, Manufacturing a vehicle seat side airbag as described in any one of claims 1-8 includes the following steps: The first and second panels are sewn together by a second seam to form a locking area; Fold the upper panel down along the fold line of the first panel, and sew the first panel in half along the first seam. The outer peripheries of the first and second panels are sewn together to form the main body of the pouch.

10. A vehicle, characterized in that, Equipped with a vehicle seat side airbag as described in any one of claims 1-8.

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