A head airbag folded bag type fixing device based on pp90 cloth sheet

Abstract

This utility model provides a folded, pouch-shaped fixing device for head airbags based on PP90 fabric, including a fixing assembly. The fixing assembly includes a PP90 fabric body, an airbag fixing piece, an airbag connecting piece, a folded airbag, and a weakening line. The airbag fixing piece is attached to the lower front surface of the PP90 fabric body, and the airbag connecting piece is attached to the lower front surface of the airbag fixing piece. This utility model reduces raw material and processing costs by using a PP90 fabric body instead of TPO plastic support components, combined with structural designs such as sewing thread connections, fabric through-holes, and airbag fixing holes with mounting screws. The lightweight characteristics of the PP90 fabric body reduce weight, contributing to overall vehicle lightweighting. The compact structure and fitting design reduce space occupation and improve the compactness of the curtain airbag. The flexibility and adaptable structure of the fabric enhance its adaptability to complex installation scenarios. The assembly process is simplified, eliminating the need for multiple components and effectively solving the shortcomings of existing technologies.

Description

Technical Field

[0001] This utility model relates to the field of airbag technology, and in particular to a folded bag-shaped fixing device for head airbags based on PP90 fabric. Background Technology

[0002] With the development of automotive technology, cars have become the most important means of transportation in people's daily lives. Cars need to be equipped with airbags. Head airbags are mainly used to prevent injuries caused by the collision between the head of the occupants and the interior parts of the car during a collision.

[0003] Existing methods for securing the folded rear-facing airbags in automobiles primarily utilize TPO (thermoplastic polyolefin) plastic supports. However, this approach has significant limitations: firstly, it is costly due to the complexity of raw material procurement and processing; secondly, it is heavy, directly hindering the lightweighting process of the entire vehicle; thirdly, it occupies a large amount of space, significantly limiting the compactness of the folded airbag; fourthly, it lacks flexibility, making it difficult to adapt to complex installation scenarios; and fifthly, the assembly process is cumbersome, requiring the coordinated operation of multiple components to complete the assembly. Therefore, this paper proposes a head airbag folding rear-facing airbag securing device based on PP90 fabric. Utility Model Content

[0004] In view of this, the present invention aims to provide a head airbag folding bag-shaped fixing device based on PP90 fabric to solve or alleviate the technical problems existing in the prior art, or at least provide a beneficial option.

[0005] The technical solution of this utility model embodiment is implemented as follows: a head airbag folding bag-shaped fixing device based on PP90 fabric, including a fixing component, the fixing component including a PP90 fabric body, an airbag fixing piece, an airbag connecting piece, a folding airbag, a sewing thread, a fabric through hole, an airbag fixing hole and a weakening line. An airbag fixing piece is attached to the lower front surface of the PP90 fabric body. An airbag connecting piece is attached to the lower front surface of the airbag fixing piece. A folded airbag is fixedly connected to the bottom of the airbag connecting piece. The bottom front surfaces of the PP90 fabric body and the airbag connecting piece are fixedly connected to the top rear surface of the airbag fixing piece by sewing thread. The rear surface of the PP90 fabric body is attached to the outer side wall of the folded airbag. A fabric through-hole is opened in the middle of the front surface of the airbag fixing piece. The top of the PP90 fabric body passes through the interior of the fabric through-hole. Airbag fixing holes are opened in the upper front surfaces of both the PP90 fabric body and the airbag fixing piece. A weakening line is provided on the upper part of the front surface of the PP90 fabric body near the airbag fixing piece.

[0006] More preferably, the stitch density of the sewing thread is 8-12 stitches / cm, and the sewing path of the sewing thread is in a continuous wavy shape along the edge where the PP90 fabric body, the airbag connecting piece, and the airbag fixing piece contact.

[0007] More preferably, the upper part of both sides of the PP90 fabric body is provided with arc-shaped grooves, and the inner sidewalls of the two arc-shaped grooves are matched with the inner sidewalls of the through holes of the fabric.

[0008] More preferably, the weakening line is a discontinuous line formed by laser perforation, with a hole spacing of 0.5-1mm and a total length of 1 / 3-1 / 2 of the width of the PP90 fabric body, and is set along the main force direction when the airbag is deployed.

[0009] More preferably, the front surfaces of the PP90 fabric body, the airbag connecting piece, and the airbag fixing piece are all provided with positioning seams near the upper part of the sewing line.

[0010] More preferably, mounting screws penetrate the interior of the two airbag fixing holes.

[0011] More preferably, an anti-slip pad is fitted on the rear part of the outer side wall of the mounting screw, and the front surface of the anti-slip pad is attached to the rear surface of the PP90 fabric body near the outer side of the airbag fixing hole.

[0012] More preferably, the inner wall of the airbag fixing hole is provided with an annular reinforcing layer.

[0013] The present invention has the following advantages due to the adoption of the above technical solution: This invention reduces raw material and processing costs by using a PP90 fabric sheet as the main body instead of a TPO plastic support component, combined with structural designs such as sewing thread connection, fabric through-holes, and airbag fixing holes with mounting screws. The lightweight nature of the PP90 fabric sheet reduces weight, contributing to overall vehicle lightweighting. The compact structure and fitting design reduce space occupation and improve the compactness of the air curtain. The fabric's flexibility and adaptable structure enhance its adaptability to complex installation scenarios. The assembly process is simplified, eliminating the need for multiple components and effectively addressing the shortcomings of existing technologies.

[0014] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0016] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the PP90 fabric sheet body and the weakening line of this utility model; Figure 3 This is a cross-sectional view of the overall structure of this utility model; Figure 4 This is a cross-sectional view of the PP90 fabric sheet used to wrap the folded airbag of this utility model.

[0017] Reference numerals: 1. Fixing component; 11. PP90 fabric body; 12. Airbag fixing piece; 13. Airbag connecting piece; 14. Folding airbag; 15. Sewing thread; 16. Fabric through hole; 17. Airbag fixing hole; 18. Weakening line; 19. Arc-shaped groove; 20. Positioning seam; 21. Mounting screw; 22. Anti-slip pad; 23. Circular reinforcement layer. Detailed Implementation

[0018] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-4 As shown, this utility model embodiment provides a head airbag folding bag-shaped fixing device based on PP90 fabric, including fixing component 1. Fixing component 1 includes PP90 fabric body 11, airbag fixing piece 12, airbag connecting piece 13, folding airbag 14, sewing thread 15, fabric through hole 16, airbag fixing hole 17 and weakening line 18. An airbag fixing piece 12 is attached to the lower front surface of the PP90 fabric body 11. An airbag connecting piece 13 is attached to the lower front surface of the airbag fixing piece 12. A folded airbag 14 is fixedly connected to the bottom of the airbag connecting piece 13. The bottom front surfaces of the PP90 fabric body 11 and the airbag connecting piece 13 are fixedly connected to the top rear surface of the airbag fixing piece 12 by a sewing thread 15. The rear surface of the PP90 fabric body 11 is attached to the outer side wall of the folded airbag 14. A fabric through hole 16 is opened in the middle of the front surface of the airbag fixing piece 12. The top of the PP90 fabric body 11 passes through the interior of the fabric through hole 16. An airbag fixing hole 17 is opened in the upper front surface of both the PP90 fabric body 11 and the airbag fixing piece 12. A weakening line 18 is provided on the upper part of the front surface of the PP90 fabric body 11 near the airbag fixing piece 12. The PP90 fabric body 11 is made of polypropylene (PP) as the core raw material, and is produced by spinning and weaving processes. It has high strength and good flexibility. Its key performance parameters include: tensile strength ≥1050N / cm, which can withstand the tension of the folding airbag 14 during daily restraint and installation; tear strength ≥80N / cm, which ensures that it is not easily damaged by external forces such as vibration and friction in non-collision state; and temperature resistance range of -40℃ to 120℃, which can adapt to the temperature changes of different automotive use environments and avoid low-temperature embrittlement or high-temperature aging. The PP90 fabric body 11, through the high strength characteristics of polypropylene material, multi-dimensional structural connection design and directional fracture release mechanism of weakening line 18, takes into account both the daily stable restraint of folding airbag 14 and safe and efficient deployment during collision. It is the core carrier for the device to achieve lightweight, low cost and high safety.

[0021] In one embodiment, specifically: the stitch density of the sewing thread 15 is 8-12 stitches / cm, and the sewing path of the sewing thread 15 is in a continuous wavy shape along the edge where the PP90 fabric body 11, the airbag connecting piece 13 and the airbag fixing piece 12 meet. Among them, the stitch density directly determines the connection strength and flexibility of the suture site. A density range of 8-12 stitches / cm can ensure the connection strength with a sufficient number of stitches (ensuring that the three parts fit together and are fixed without separation), while also retaining a certain degree of flexibility to accommodate slight relative displacement between components. The suture path is a continuous wavy shape along the contact edges of the three components, rather than a straight line, serving two main functions: The wavy path disperses the stress on the suture more, avoiding stress concentration at a single point when suturing in a straight line (such as when a vehicle is bumping, the local tension will not directly act on a single stitch), thus reducing the risk of suture breakage. When the folded airbag 14 begins to inflate upon impact, a slight relative stretching or displacement will occur between the PP90 fabric body 11, the airbag connecting piece 13, and the airbag fixing piece 12. The wavy path can adapt to this deformation through its own "stretching" characteristics, preventing the sutures from being torn due to rigid constraints, reserving buffer space for the priority breakage of the weakening line 18 (releasing constraints), and ensuring that the airbag deployment process is not hindered.

[0022] In one embodiment, specifically: arc-shaped grooves 19 are provided on the upper parts of both sides of the PP90 fabric body 11, and the inner sidewalls of the two arc-shaped grooves 19 are adapted to the inner sidewalls of the fabric through holes 16; by adapting the arc-shaped grooves 19 on the upper parts of both sides of the PP90 fabric body 11 to the inner sidewalls of the fabric through holes 16, the bonding stability after penetration is enhanced. In one embodiment, specifically: the weakening line 18 is a discontinuous line formed by laser perforation, with a hole spacing of 0.5-1mm, a total length of 1 / 3-1 / 2 of the width of the PP90 fabric body 11, and is set along the main force direction when the airbag is deployed; The weakening line 18 is designed to precisely and quickly release the constraint of the PP90 fabric 11 on the folded airbag 14 during a collision, while ensuring structural stability during daily use. The discontinuous lines formed by laser perforation make this area a mechanical weak point of the PP90 fabric 11, with lower tear resistance, allowing it to break preferentially under the thrust generated by the inflation of the folded airbag 14. The hole spacing of 0.5-1mm balances "fractureability" and "daily stability." Too small a spacing would make the weakening line too fragile, potentially leading to accidental breakage due to vibration, while too large a spacing would increase the fracture resistance, delaying the airbag deployment. The total length is 1 / 3 to 1 / 2 of the width of the PP90 fabric 11, ensuring that a sufficient opening is formed after fracture to release the folded airbag 14, while avoiding the impact of excessive length on the overall structural strength of the fabric. The line is set along the main force direction during airbag deployment, ensuring that the fracture direction is consistent with the airbag inflation thrust direction, guaranteeing the directionality of constraint release, and ensuring that the folded airbag 14 deploys smoothly along the preset path to perform its protective function.

[0023] In one embodiment, specifically: the front surfaces of the PP90 fabric body 11, the airbag connecting piece 13, and the airbag fixing piece 12 are all provided with positioning seams 20 near the upper part of the sewing line 15; the positioning seams 20 facilitate the alignment of the PP90 fabric body 11, the airbag connecting piece 13, and the airbag fixing piece 12 during installation, ensuring the precise relative positions of the three, thereby ensuring the precision of the sewing, and thus ensuring the consistency of the shape of the folded airbag 14.

[0024] In one embodiment, specifically: mounting screws 21 pass through the interior of the two airbag fixing holes 17; the mounting screws 21 facilitate the secure fixing of the entire device to the vehicle mounting position.

[0025] In one embodiment, specifically: an anti-slip pad 22 is fitted on the rear part of the outer side wall of the mounting screw 21, and the front surface of the anti-slip pad 22 is attached to the rear surface of the PP90 fabric body 11 near the outer side of the airbag fixing hole 17; the anti-slip pad 22 fitted on the outer side wall of the mounting screw 21 is in close contact with the rear surface of the PP90 fabric body 11, thereby preventing the device from loosening during vehicle vibration through friction.

[0026] In one embodiment, specifically: an annular reinforcing layer 23 is provided on the inner wall of the airbag fixing hole 17; the annular reinforcing layer 23 on the inner wall of the airbag fixing hole 17 enhances the tear resistance of the hole, thereby preventing the edge of the airbag fixing hole 17 from being damaged when the screw is tightened, and increasing the tensile strength of the edge of the airbag fixing hole 17.

[0027] When this utility model is in operation: when the car is driving or parked normally, the rear surface of the PP90 fabric body 11 is tightly attached to the outer side wall of the folded airbag 14, forming a wrapping constraint along its folded contour; the lower part of its front surface is attached to the airbag fixing piece 12, and the lower part of the airbag fixing piece 12 is attached to the airbag connecting piece 13, and the three are fixedly connected at the bottom edge by sewing thread 15; the top of the PP90 fabric body 11 extends upward and passes through the fabric through hole 16 in the middle of the airbag fixing piece 12; after passing through, the PP90 fabric body 11 is aligned with the airbag fixing hole 17 on the upper part of the airbag fixing piece 12, and the mounting screw 21 passes through the two airbag fixing holes 17 and is fixed to the car body; finally, a multi-fixing system of "wrapping-stitching-penetration-locking" is formed, which stably constrains the folded airbag 14 in a compact state; When a car collision occurs and the safety system triggers the inflation of the folding airbag 14, the airbag 14 inflates rapidly, causing a sharp increase in air pressure. This generates a tremendous outward thrust on the PP90 fabric body 11 that surrounds it. At this moment, the weakening line 18 (a discontinuous line formed by laser perforation with a hole spacing of 0.5-1mm) on the front surface of the PP90 fabric body 11 near the upper part of the airbag fixing plate 12 becomes a weak point in terms of mechanical strength. Under the thrust, it breaks preferentially, causing the PP90 fabric body 11 to separate along the weakening line 18, thus releasing the folding airbag. The airbag 14 is wrapped and restrained; after the restraint is released, the folding airbag 14 breaks through the remaining restraint under the push of air pressure and quickly unfolds in the preset direction; at this time, the connection between the airbag fixing piece 12 and the airbag connecting piece 13 and the PP90 fabric body 11 through the sewing thread 15 remains stable, and the fixing of the mounting screw 21 to the vehicle body is also not loose, providing a reliable basic support for the unfolding of the folding airbag 14, ensuring that its unfolding position is accurate (directly facing the occupant's head area), and finally forming an effective buffer barrier to avoid direct collision between the occupant's head and the vehicle body parts.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A PP90 cloth sheet based head restraint airbag folding post bag type fixing device, characterized by: The device includes a fixing component (1), which includes a PP90 fabric body (11), an airbag fixing piece (12), an airbag connecting piece (13), a folding airbag (14), a sewing thread (15), a fabric through hole (16), an airbag fixing hole (17), and a weakening line (18). An airbag fixing piece (12) is attached to the lower front surface of the PP90 fabric body (11). An airbag connecting piece (13) is attached to the lower front surface of the airbag fixing piece (12). A folded airbag (14) is fixedly connected to the bottom of the airbag connecting piece (13). The bottom front surfaces of the PP90 fabric body (11) and the airbag connecting piece (13) are fixedly connected to the top rear surface of the airbag fixing piece (12) by a sewing thread (15). The PP90 fabric body (11) The rear surface is attached to the outer wall of the folded airbag (14). A fabric through hole (16) is provided in the middle of the front surface of the airbag fixing piece (12). The top of the PP90 fabric body (11) passes through the interior of the fabric through hole (16). Airbag fixing holes (17) are provided on the upper part of the front surface of both the PP90 fabric body (11) and the airbag fixing piece (12). A weakening line (18) is provided on the front surface of the PP90 fabric body (11) near the upper part of the airbag fixing piece (12).

2. A PP90 fabric based head airbag folding after bag type fixation device according to claim 1, characterized in that: The stitch density of the sewing thread (15) is 8-12 stitches / cm, and the sewing path of the sewing thread (15) is in a continuous wavy shape along the edge where the PP90 fabric body (11), the airbag connecting piece (13) and the airbag fixing piece (12) meet.

3. A PP90 fabric based head airbag folding after bag type fixation device according to claim 1, characterized in that: The upper part of both sides of the PP90 fabric body (11) is provided with arc-shaped grooves (19), and the inner sidewalls of the two arc-shaped grooves (19) are matched with the inner sidewalls of the fabric through hole (16).

4. A PP90 fabric based head airbag folding after bag type fixation device according to claim 1, characterized in that: The weakening line (18) is a discontinuous line formed by laser perforation, with a hole spacing of 0.5-1mm and a total length of 1 / 3-1 / 2 of the width of the PP90 fabric body (11), and is set along the main force direction when the airbag is deployed.

5. A PP90 cloth sheet based head airbag folding after bag type fixing device according to claim 1, characterized in that: The front surfaces of the PP90 fabric body (11), airbag connecting piece (13) and airbag fixing piece (12) are all provided with positioning seams (20) near the upper part of the sewing line (15).

6. A PP90 cloth sheet based head airbag folding after bag type fixing device according to claim 1, characterized in that: The two airbag fixing holes (17) are fitted with mounting screws (21).

7. A PP90 fabric based head airbag folding after bag type fixation device according to claim 6, characterized in that: An anti-slip pad (22) is fitted on the rear side of the outer wall of the mounting screw (21). The front surface of the anti-slip pad (22) is attached to the rear surface of the PP90 fabric body (11) near the outer side of the airbag fixing hole (17).

8. A PP90 fabric based head airbag folding after bag type fixation device according to claim 6, characterized in that: The inner wall of the airbag fixing hole (17) is provided with an annular reinforcing layer (23).

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