A curtain-type airbag bag with high inflation reliability

Abstract

The utility model discloses a curtain type safety air bag bag with high inflation reliability. The curtain type safety air bag bag with high inflation reliability comprises an upper air bag piece and a lower air bag piece, the upper air bag piece and the lower air bag piece are stitched to form an air bag cavity, and the air bag cavity is provided with an inflation port. The curtain type safety air bag bag comprises a gas guide reinforcing piece arranged at the inflation port, the gas guide reinforcing piece comprises two first reinforcing pieces and two second reinforcing pieces, the two first reinforcing pieces and the two second reinforcing pieces are located between the upper air bag piece and the lower air bag piece, and the two second reinforcing pieces are located outside the two first reinforcing pieces. The first reinforcing piece has an overlapping part overlapping with the second reinforcing piece and a gas nozzle part extending beyond the second reinforcing piece, the two first reinforcing pieces and the two second reinforcing pieces are stitched at the partial edges of the overlapping part and are provided with gas distribution ports, and the two first reinforcing pieces are respectively stitched with the upper air bag piece and the lower air bag piece at the edges of the gas nozzle part.

Description

Technical Field

[0001] This utility model relates to the field of airbag technology, and in particular to a curtain-type airbag bag with high inflation reliability. Background Technology

[0002] Curtain airbags (CABs) are an important component of a vehicle's passive safety system. They are typically installed on the top of the side panel of the vehicle and inflate rapidly in the event of a side collision or rollover to prevent occupants' heads from directly impacting the vehicle structure or external objects. With increasingly stringent automotive safety standards, higher requirements are being placed on the inflation reliability, deployment speed, and structural strength of curtain airbags.

[0003] In existing technologies, the airbag structure of curtain airbags typically consists of an upper and lower airbag panel sewn together to form the airbag cavity, which is then connected to the gas generator via an inflation port. However, traditional curtain airbags suffer from insufficient strength in the gas guiding structure and uneven gas distribution during inflation. Specifically, the inflation port area, directly subjected to the high-pressure gas impact from the gas generator, is prone to localized stress concentration, leading to tearing at the sewn joints or damage to the airbag material, resulting in leakage or inflation failure. Furthermore, the lack of gas flow guidance causes uneven pressure distribution within the airbag cavity, with some areas over-inflated while others are under-inflated, affecting the airbag's protective coverage for occupants.

[0004] To address these issues, some existing technologies attempt to improve structural strength by increasing the thickness of the airbag material or optimizing the stitching process. However, such solutions may lead to increased airbag weight, larger folded volume, or reduced deployment flexibility due to excessively rigid materials.

[0005] Therefore, it is necessary to propose a technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model proposes a curtain-type airbag with high inflation reliability.

[0007] This utility model is achieved through the following technical solution: a curtain-type airbag with high inflation reliability, comprising an upper airbag piece and a lower airbag piece, the upper airbag piece and the lower airbag piece being sewn together to form an airbag cavity, the airbag cavity having an inflation port, the curtain-type airbag including an air guiding reinforcement member disposed at the inflation port, the air guiding reinforcement member including two first reinforcement pieces and two second reinforcement pieces, the two first reinforcement pieces and the two second reinforcement pieces being located between the upper airbag piece and the lower airbag piece, and the two second reinforcement pieces being located outside the two first reinforcement pieces, wherein the first reinforcement piece has an overlapping portion that overlaps with the second reinforcement piece, and an air nozzle portion extending beyond the second reinforcement piece, the two first reinforcement pieces and the two second reinforcement pieces being sewn together at a portion of the edge of the overlapping portion and leaving an air distribution port, the two first reinforcement pieces being sewn together with the upper airbag piece and the lower airbag piece respectively at the edge of the air nozzle portion.

[0008] As a further improved technical solution, the air bag cavity includes two cavities located on the left and right sides of the inflation port, and the air distribution port is two in number, facing the two cavities respectively.

[0009] As a further improved technical solution, the two first reinforcing sheets and the two second reinforcing sheets are stitched together at the bottom edge, upper right edge and upper left edge of the overlapping part.

[0010] As a further improved technical solution, the edges of the air distribution port formed by the two first reinforcing plates and the two second reinforcing plates are straight edges.

[0011] As a further improved technical solution, the air nozzle extends to the right, and the upper right edges of the two first reinforcing plates and the two second reinforcing plates are folded lines and / or arc-shaped edges.

[0012] As a further improved technical solution, the upper left part of the two first reinforcing plates and the two second reinforcing plates is provided with an arc-shaped corner.

[0013] As a further improved technical solution, both the first reinforcing sheet and the second reinforcing sheet have at least one side as an adhesive-coated reinforcing surface with an adhesive layer.

[0014] As a further improved technical solution, the curtain-type airbag also includes several stitching areas at the two cavities where the upper and lower airbag pieces are sewn together.

[0015] As a further improved technical solution, the suture area includes a circular area, or a bone-shaped area with both ends circular and the middle connected by a thin strip.

[0016] As a further improved technical solution, the air bag cavity formed by stitching the upper and lower air bag pieces together is roughly U-shaped.

[0017] The curtain-type airbag with high inflation reliability provided by this utility model has a multi-layered reinforcing structure for the air inlet area. The composite structure of two first reinforcing sheets and two second reinforcing sheets and a specific stitching method significantly improve the tear resistance of the air inlet area and optimize the uniformity of gas distribution while ensuring the lightweight and folding performance of the airbag. This ensures the reliability of the airbag deployment under extreme working conditions. Attached Figure Description

[0018] Figure 1 This is a plan view of an embodiment of the curtain-type airbag of this utility model.

[0019] Figure 2 This is a plan view of the first reinforcing piece in one embodiment of the curtain-type airbag of this utility model.

[0020] Figure 3 This is a plan view of the second reinforcing piece in one embodiment of the curtain-type airbag of this utility model.

[0021] Figure 4 This is a planar schematic diagram of the first and second reinforcing pieces after being sewn together, according to an embodiment of the curtain-type airbag of this utility model.

[0022] Figure 5 yes Figure 1 Schematic diagram of cross section along line AA.

[0023] Figure 6 It is along Figure 1 Schematic diagram of the cross section of the middle BB line.

[0024] The attached diagram is labeled as follows: 101 - edge stitching of the bag piece; 102 - stitching area; 103 - upper piece of the air bag; 104 - lower piece of the air bag; 11 - left cavity; 12 - right cavity; 13 - connecting ear; 15 - inflation port; 2 - air guiding reinforcement; 201 - left air outlet; 202 - right air outlet; 203 - bottom stitching; 204 - upper right stitching; 205 - upper left stitching; 206 - mouth stitching; 21 - first reinforcing piece; 211 - overlapping part; 2111 - bottom edge; 2112 - upper right edge; 2113 - upper left edge; 212 - air nozzle; 22 - second reinforcing piece. Detailed Implementation

[0025] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 6 As shown, this utility model discloses a curtain-type airbag with high inflation reliability. The curtain-type airbag includes an upper airbag panel 103 and a lower airbag panel 104, which are sewn together to form an airbag cavity. The airbag cavity has an inflation port 15. The curtain-type airbag includes an air guiding reinforcement 2 located at the inflation port 15. The air guiding reinforcement 2 includes two first reinforcing pieces 21 and two second reinforcing pieces 22, both located between the upper airbag panel 103 and the lower airbag panel 104, with the two second reinforcing pieces 22 located outside the two first reinforcing pieces 21. The first reinforcing piece 21 has an overlapping portion 211 that overlaps with the second reinforcing piece 22, and an air nozzle portion 212 that extends beyond the second reinforcing piece 22. The two first reinforcing pieces 21 and the two second reinforcing pieces 22 are sewn together at part of the edge of the overlapping portion 211 and leave an air distribution port. The two first reinforcing pieces 21 are sewn together with the upper air bag piece 103 and the lower air bag piece 104 at the edge of the air nozzle portion 212, respectively.

[0028] The curtain-type airbag with high inflation reliability provided by this utility model has an air guiding reinforcement 2 designed in the inflation port 15 area. The air guiding reinforcement 2 adopts a multi-layer reinforcing sheet structure. By using the composite structure of two first reinforcing sheets 21 and two second reinforcing sheets 22 and a specific stitching method, the tear resistance of the inflation port 15 area is significantly improved and the uniformity of gas distribution is optimized while ensuring the lightweight and folding performance of the airbag, thus ensuring the deployment reliability of the airbag under extreme working conditions.

[0029] like Figure 1As shown, the curtain-type airbag of this utility model is formed by an upper airbag piece 103 and a lower airbag piece 104 enclosing an airbag cavity through a seam 101 along the edge of the airbag pieces. The airbag cavity is generally U-shaped, including a left cavity 11 and a right cavity 12 located on the left and right sides of the inflation port 15. The edge of the curtain-type airbag is also provided with several connecting ears 13, which are used to fix the curtain-type airbag to the vehicle body or other components that need to be connected. An air guiding reinforcement 2 is provided at the inflation port 15. The air guiding reinforcement 2 is composed of two first reinforcing pieces 21 and two second reinforcing pieces 22, which are used to enhance the tear resistance of the inflation port area and guide the gas flow. Several stitched areas 102 are provided inside the airbag cavity to adjust the airbag deployment shape and air pressure distribution.

[0030] Please refer to Figures 2 to 6 As shown, the air guiding reinforcement 2 adopts a four-layer composite structure: two first reinforcing plates 21 are located on the inner side, and two second reinforcing plates 22 are symmetrically located on the outer side of the first reinforcing plates 21. Specifically, the first reinforcing plate 21 includes an overlapping portion 211 and an air nozzle portion 212, wherein the overlapping portion 211 and the second reinforcing plate 22 have approximately the same shape and can overlap and be stitched together. The air nozzle portion 212 extends outward beyond the boundary of the second reinforcing plate 22. The two first reinforcing plates 21 and the two second reinforcing plates 22 are stitched together at the bottom edge 2111, the upper right edge 2112, and the upper left edge 2113 of the overlapping portion 211. In this embodiment, the air distribution port includes a left air distribution port 201 facing the left cavity 11 and a right air distribution port 202 facing the right cavity 12. The edges of the two first reinforcing plates 21 and the two second reinforcing plates 22 forming the air distribution port are straight edges. In this embodiment, the air nozzle portion 212 extends to the left, and the upper right edge 2112 of the two first reinforcing plates 21 and the two second reinforcing plates 22 is a folded line and / or an arc-shaped edge. A rounded corner portion is provided at the upper left edge 2113 of the two first reinforcing plates 21 and the two second reinforcing plates 22.

[0031] Specifically, the air guiding reinforcement 2 has two air distribution ports, which can evenly distribute high-pressure gas to the left cavity 11 and the right cavity 12. For this purpose, the two first reinforcing pieces 21 and the second reinforcing piece 22 are sewn together at a specific edge of the overlapping portion 211 to form an air distribution port structure. In this embodiment, the bottom stitching line 203 sews both first reinforcing pieces 21 and both second reinforcing pieces 22 along the bottom edge 2111 of the overlapping portion 211, sealing the lower side of the inflation port 15; the upper right stitching line 204 and the upper left stitching line 205 are sewn together along the upper right edge 2112 and the upper left edge 2113 respectively, forming the air guiding boundaries of the left and right air distribution ports 201 and 202, thereby separating the inflation port 15 and the left and right air distribution ports 201 and 202. In this embodiment, the opening edges of the left and right air distribution ports 201 and 202 are designed as straight lines to ensure that the airflow direction is accurately directed towards the left cavity 11 and the right cavity 12. The width of the gas distribution port can be optimized by adjusting the position of the suture lines 204 and 205 to adapt to the flow characteristics of different gas generators.

[0032] Furthermore, the upper right edge of the second reinforcing piece 22 adopts a zigzag or arc-shaped transition, which matches the zigzag or arc-shaped edge of the first reinforcing piece 21 to form a progressive guide surface, reducing gas flow resistance. The arc-shaped corner of the gas guide reinforcement 2, such as... Figure 2 and Figure 4 As shown, this design avoids turbulence caused by sudden airflow changes, further reducing pressure loss. Additionally, the design of the nozzle 212 extending to one side further optimizes the docking angle between the inflation port 15 and the gas generator. The description of the nozzle 212 facing right in this document is for ease of description of the upper left and upper right directions. It can be understood that if it appears to be facing right when viewed from the front, it appears to be facing left when viewed from the back; therefore, the above directions are only for relative convenience and do not represent absolute directions. The curtain-type airbag provided by this utility model can be installed on the left side of a vehicle or on the right side. It is easy to understand that for installations on the left and right sides of a vehicle, the curtain-type airbag is typically designed with axial symmetry or installed symmetrically.

[0033] like Figure 5 and Figure 6As shown, the upper airbag piece 103, the first reinforcing piece 21, the second reinforcing piece 22, and the lower airbag piece 104 are stacked sequentially to form a multi-layered protective structure at the inflation port 15. The overlapping portions 211 of the first reinforcing piece 21 and the second reinforcing piece 22 are partially sewn together, forming the bottom seam 203, the upper right seam 204, and the upper left seam 205. These seams are not sewn to the upper airbag piece 103 and the lower airbag piece 104 to avoid the final pressure concentrating on them. The edges of the nozzle portions 212 of the two first reinforcing pieces 21 are sewn to the upper airbag piece 103 and the lower airbag piece 104 respectively through the opening seam 206, forming a reinforced support for the inflation channel inlet. In this invention, only the first reinforcing piece 21 extends to form the air nozzle 212, while the second reinforcing piece 22 is not present. This ensures that only a single piece reinforces one side of the air nozzle 212, avoiding excessive reinforcement of the air nozzle 212. This allows the air nozzle to guide inflation while avoiding the possibility of hard protrusions or difficulty in expansion during folding, which could affect inflation efficiency.

[0034] In this embodiment, both the first reinforcing sheet 21 and the second reinforcing sheet 22 have at least one side that is an adhesive-coated reinforcing surface. Specifically, the inward-facing sides of both the first reinforcing sheet 21 and the second reinforcing sheet 22 are adhesive-coated reinforcing surfaces. In some embodiments, the first reinforcing sheet 21 and the second reinforcing sheet 22 are made of high-strength nylon fabric, and at least one side is coated with a silicone layer to form the adhesive-coated reinforcing surface. The adhesive layer can enhance abrasion resistance to reduce frictional loss between the reinforcing sheet and the upper and lower sheets of the air bag during inflation, and improve airtightness by filling the gaps between fabric fibers, preventing high-pressure gas from leaking from the needle holes.

[0035] Please refer to it again. Figure 1 As shown, in this embodiment, the airbag cavity has a U-shaped design, which matches the vehicle's side profile to ensure that the airbag covers the area from the A-pillar to the C-pillar after deployment. The left cavity 11 and the right cavity 12 correspond to the head protection areas of the front and rear passengers, respectively. The middle recessed portion avoids the sunroof or roof beam structure to prevent interference. The middle recessed portion may have a single-layer bag piece, that is, only the upper airbag piece 103 or the lower airbag piece 104. Furthermore, multiple stitching areas 102 are provided inside the airbag cavity. The stitching areas 102 include circular areas or bone-shaped areas with circular ends and a middle section formed by a thin strip. The stitching areas 102 force the gas to disperse and fill to the distal end, achieving rapid and uniform inflation, improving inflation efficiency and effect. The use of circular or bone-shaped stitching areas 102 has the advantages of uniform stress and less tearing at the stitches. In practical applications, the number and distribution of the stitching areas 102 can be adjusted according to the specific size of the airbag.

[0036] When a vehicle collision occurs, the gas generator injects high-pressure gas into the airbag cavity through the inflation port 15. The gas, passing through the nozzle 212 of the air guide reinforcement 2, impacts the inflation port area inside the nozzle 212. This invention disperses stress through a four-layer reinforced structure in this area, preventing the upper and lower panels 103 and 104 of the airbag from directly bearing the impact and tearing. Subsequently, the gas enters the left cavity 11 and right cavity 12 through the left and right air distribution ports 201 and 202. The straight edges of the air distribution ports guide the gas to form two roughly symmetrical jets, ensuring synchronous inflation of the left and right cavities. During this process, the stitched area 102 restricts local expansion, prompting the gas to quickly fill the distal end of the airbag, reducing deployment time.

[0037] As described above, the curtain-type airbag with high inflation reliability provided by this utility model, by designing an air guiding reinforcement 2 in the inflation port 15 area, the air guiding reinforcement 2 adopts a multi-layer reinforcing sheet structure, and utilizes the composite structure of two first reinforcing sheets 21 and two second reinforcing sheets 22 and a specific stitching method, to significantly improve the tear resistance of the inflation port 15 area and optimize the uniformity of gas distribution while ensuring the lightweight and folding performance of the airbag, thus ensuring the deployment reliability of the airbag under extreme working conditions.

[0038] This utility model has been described through several specific embodiments. Those skilled in the art should understand that various modifications and equivalent substitutions can be made to this utility model without departing from its scope. Furthermore, various modifications can be made to this utility model for specific situations or circumstances without departing from its scope. Therefore, this utility model is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of this utility model.

Claims

1. A curtain airbag having high reliability of inflation, comprising an upper airbag panel and a lower airbag panel, the upper airbag panel and the lower airbag panel being sewn to enclose an airbag chamber, the airbag chamber having an inflation port, characterized in that, The curtain-type airbag bag comprises a gas guide reinforcing piece arranged at the inflation port, the gas guide reinforcing piece comprises two pieces of first reinforcing pieces and two pieces of second reinforcing pieces, the two pieces of first reinforcing pieces and the two pieces of second reinforcing pieces are arranged between the upper bag piece and the lower bag piece, and the two pieces of second reinforcing pieces are arranged outside the two pieces of first reinforcing pieces, wherein the first reinforcing piece has an overlapping part overlapping with the second reinforcing piece and a gas nozzle part extending beyond the second reinforcing piece, the two pieces of first reinforcing pieces and the two pieces of second reinforcing pieces are sewn at part of the edges of the overlapping part and leave a gas distribution port, and the two pieces of first reinforcing pieces are respectively sewn with the upper bag piece and the lower bag piece at the edges of the gas nozzle part.

2. The curtain airbag of claim 1, wherein The bag cavity comprises two cavities arranged at the left and right sides of the inflation port, and the gas distribution port comprises two gas distribution ports respectively facing the two cavities.

3. The curtain airbag of claim 2, wherein the airbag fabric is formed by sewing the airbag fabric pieces together in a manner that the airbag fabric pieces are overlapped with each other in the overlapping portions. The two pieces of first reinforcing pieces and the two pieces of second reinforcing pieces are sewn at the bottom edges, the right upper edges and the left upper edges of the overlapping part.

4. The curtain airbag of claim 3, wherein The edges of the two pieces of first reinforcing pieces and the two pieces of second reinforcing pieces forming the gas distribution port are straight edges.

5. The curtain-type airbag with high inflation reliability as described in claim 3, characterized in that, The gas nozzle part extends towards the left side, and the right upper edges of the two pieces of first reinforcing pieces and the two pieces of second reinforcing pieces are fold lines and / or arc lines.

6. The curtain airbag of claim 5, wherein The left upper parts of the two pieces of first reinforcing pieces and the two pieces of second reinforcing pieces are provided with circular arc corner parts.

7. The curtain airbag of claim 1, wherein The first reinforcing piece and the second reinforcing piece are at least single-sidedly provided with a glue-coated reinforcing surface with a glue-coated layer.

8. The curtain airbag of claim 2, wherein The curtain-type airbag bag further comprises a plurality of sewing areas for sewing the upper bag piece and the lower bag piece at the two cavities.

9. The curtain airbag of claim 8, wherein The sewing area comprises a circular area, or a bone-shaped area formed by connecting a circular-shaped two ends and an elongated strip-shaped middle part.

10. The curtain airbag of claim 1 to 9, wherein The bag cavity surrounded by the sewn upper bag piece and lower bag piece is substantially a concave-shaped cavity.

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