Cushion air bag

Abstract

The application discloses a cushion air bag, which comprises a bag and a guide air bag arranged in the bag, wherein the guide air bag comprises a primary guide air bag and at least one secondary guide air bag formed by a cloth piece, the primary guide air bag and the at least one secondary guide air bag are arranged along a first direction of the bag, the primary guide air bag and the secondary guide air bag are communicated through a first guide air hole, and both ends of the primary guide air bag and the secondary guide air bag in a second direction of the bag are arranged as openings to be communicated with an internal cavity of the bag; the cloth piece forming the primary guide air bag is sewn and fixed with a corresponding bag cloth piece through a first sewing line, and / or the cloth piece forming the secondary guide air bag is sewn and fixed with a corresponding bag cloth piece through a second sewing line, and the first sewing line and the second sewing line are arranged along the second direction of the bag. The application improves the support capacity for the hips of the passenger and solves the problem that the uneven force is applied to the hips of the passenger due to the planar structure formed after the bag is unfolded in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of safety airbags, and in particular to a seat cushion airbag. Background Art

[0002] With the rapid development of autonomous driving and intelligent cockpits, the riding scenarios and sitting postures of vehicle occupants have undergone significant changes. For example, as the tilt angle of the seats changes, passengers are often forced to sit at a steep angle. Compared to a conventional sitting position, a steep angle is more likely to cause the occupant to dive during a vehicle impact, leading to risks such as increased spinal forces, increased abdominal pressure, and seatbelt strangulation. Therefore, to prevent this, anti-dive air cushions are often installed on passenger seats.

[0003] Existing anti-submarine air cushions are typically made of two aligned, sewn pieces of fabric with a pre-set hole for the generator. Therefore, when the gas generator is activated to inflate the anti-submarine air cushion, the side of the cushion facing the occupant forms a hemispherical structure. Due to the high internal pressure of the inflated anti-submarine air cushion, the contact area between the cushion and the occupant's buttocks is reduced, resulting in uneven force on the occupant's buttocks, ultimately leaving the occupant at risk of diving or tilting.

[0004] Based on this, a new technical solution is needed. Summary of the Invention

[0005] In view of this, an embodiment of the present invention provides a seat cushion airbag to at least solve the problem that the top of the existing seat cushion airbag forms a hemispherical structure after inflation, resulting in uneven force on the occupant's buttocks.

[0006] The embodiments of the present invention provide the following technical solutions:

[0007] An embodiment of the present invention provides a seat cushion airbag, comprising a bag and an air guide bag disposed within the bag, the bag comprising two oppositely disposed bag cloth pieces, one of the bag cloth pieces being provided with a bag mounting hole, the air guide bag comprising a primary air guide bag and at least one secondary air guide bag formed by the cloth pieces, the primary air guide bag and at least one secondary air guide bag being both disposed along a first direction of the bag, the primary air guide bag and the secondary air guide bag being connected via a first air guide hole, and both ends of the primary air guide bag and the secondary air guide bag in a second direction of the bag being provided with openings so as to communicate with an internal cavity of the bag;

[0008] The fabric piece forming the primary air guide bag is sewn and fixed to the corresponding bladder bag fabric piece by a first stitching line, and / or the fabric piece forming the secondary air guide bag is sewn and fixed to the corresponding bladder bag fabric piece by a second stitching line, and both the first stitching line and the second stitching line are arranged along the second direction of the bladder bag;

[0009] wherein, when the airbag and the air guide bag are inflated, the gas flows to the edge portion of the airbag through the openings at both ends of the primary air guide bag, and flows to the secondary air guide bag through the first air guide hole, the thickness of the middle portion of the airbag is limited by the first suture and / or the second suture to form a receiving surface on the airbag.

[0010] Further, the first suture and the primary air guide bag have a first preset distance between one end close to the secondary air guide bag; the second suture and the secondary air guide bag have a second preset distance between one end away from the primary air guide bag, the first preset distance and the second preset distance are used to limit the inflation thickness of the middle portion of the airbag and the length of the receiving surface.

[0011] Further, the first suture has a first preset length in the second direction, and the second suture has a second preset length in the second direction, the first preset length and the second preset length are used to limit the width of the receiving surface.

[0012] Further, the air guide bag comprises:

[0013] two oppositely arranged first air guide cloth pieces, both ends of the two first air guide cloth pieces in the first direction of the airbag are closed to form a primary air guide bag, both ends of the primary air guide bag in the second direction of the airbag are provided with openings to communicate with the internal cavity of the airbag, and the primary air guide bag is provided with the first air guide hole;

[0014] two oppositely arranged second air guide cloth pieces, both ends of the two second air guide cloth pieces in the first direction of the airbag are closed to form a secondary air guide bag, both ends of the secondary air guide bag in the second direction of the airbag are provided with openings to communicate with the internal cavity of the airbag;

[0015] wherein, the length of the second air guide cloth piece in the first direction of the airbag is greater than the length of the first air guide cloth piece in the first direction of the airbag, the primary air guide bag is arranged at one end in the secondary air guide bag and forms a reserved air guide cavity in the secondary air guide bag, and the primary air guide bag communicates with the reserved air guide cavity through the first air guide hole.

[0016] Further, the first air guide cloth piece is fixed by sewing the first suture with the corresponding second air guide cloth piece and the airbag cloth piece.

[0017] Further, the reserved air guide cavity is provided with a second air guide hole at one end away from the primary air guide bag, and the second air guide hole is used to guide the gas in the reserved air guide cavity to one end of the airbag away from the primary air guide bag.

[0018] Further, each of the bag pieces is at least two layers;

[0019] The first air guide piece is fixed by the first sewing line with the corresponding second air guide piece and at least one corresponding bag piece.

[0020] The second air guide piece is fixed by the second sewing line with at least one corresponding bag piece.

[0021] Further, the two first air guide pieces are integrally connected, the two second air guide pieces are integrally connected, and the two bag pieces are integrally connected.

[0022] Further, the application further comprises:

[0023] A first weakened sewing part is sewn on the primary air guide bag and corresponds to the first air guide hole.

[0024] Further, the application further comprises:

[0025] A second weakened sewing part is sewn on the secondary air guide bag and corresponds to the second air guide hole.

[0026] Compared with the prior art, the above-mentioned at least one technical scheme adopted by the embodiment of the application can achieve the beneficial effects at least including:

[0027] The seat cushion air bag of the application sets a primary air guide bag and a secondary air guide bag inside the bag, so that after the gas enters the primary air guide bag, the gas can enter the edge of the bag through the openings on both sides of the primary air guide bag and enter the secondary air guide bag through the first air guide hole, so that the edge of the bag expands first, the middle part of the bag expands later, the passenger's hips are surrounded, and the middle part of the bag does not expand rapidly to cause discomfort to the passenger's hips or affect the passenger's sitting posture stability.

[0028] Further, the primary air guide bag is fixed by the first sewing line with the corresponding bag piece, and the secondary air guide bag is fixed by the second sewing line with the corresponding bag piece, so that when the bag expands, its inflation height is limited to close to the primary air guide bag and the secondary air guide bag under the action of the first sewing line and the second sewing line, so that a receiving surface is formed on the upper surface of the bag, and the receiving surface is a substantially planar structure, thereby solving the problem that the planar structure formed after the bag expands in the prior art causes uneven force on the passenger's hips. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 A top view of a seat cushion airbag according to an embodiment of the present invention;

[0031] Figure 2 is a cross-sectional view of a seat cushion airbag according to an embodiment of the present invention;

[0032] Figure 3 This is a specific implementation (1) of a seat cushion airbag according to an embodiment of the present invention;

[0033] Figure 4 This is a specific implementation (II) of a seat cushion airbag according to an embodiment of the present invention;

[0034] Figure 5 This is a specific implementation method (3) of a seat cushion airbag according to an embodiment of the present invention;

[0035] Figure 6 This is a specific implementation (fourth) of a seat cushion airbag according to an embodiment of the present invention;

[0036] Figure 7 This is a specific implementation (fifth) of a seat cushion airbag according to an embodiment of the present invention;

[0037] Figure 8 This is a specific implementation (six) of a seat cushion airbag according to an embodiment of the present invention;

[0038] Figure 9 This is a specific implementation (seven) of a seat cushion airbag according to an embodiment of the present invention;

[0039] Figure 10 This is a specific implementation (eight) of a seat cushion airbag according to an embodiment of the present invention.

[0040] The accompanying drawings of the present invention are as follows:

[0041] 10. Bladder bag; 11. Bladder bag fabric; 12. Bladder bag mounting hole;

[0042] 20. Air guide bag; 21. First-level air guide bag; 22. Second-level air guide bag; 23. First air guide hole; 24. Opening; 25. First air guide cloth; 26. Second air guide cloth; 27. Reserved air guide cavity; 28. Second air guide hole;

[0043] 30. First suture;

[0044] 40. Second suture;

[0045] 50. First weakened sewing portion;

[0046] 60. Second weakened sewing portion. DETAILED DESCRIPTION

[0047] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0048] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0049] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an 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 aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0050] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0051] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0052] Since the existing seat cushion airbag lacks restrictions and constraints on its upper surface after inflation, the upper surface of the seat cushion airbag is fully inflated, resulting in a hemispherical or arc-shaped structure on its upper surface. This will undoubtedly affect the occupant's sitting posture in a collision event and provide uneven support for the occupant's buttocks. Although it protects the occupant's buttocks, the occupant's sitting posture is affected by the seat cushion airbag and there is a problem of side tilt, which will undoubtedly pose a potential danger to the occupant.

[0053] In addition, since the middle part expands first when the seat airbag inflates, there is a lack of restraint on the occupants around the seat airbag, which may cause the occupants to dive, shift sideways, and other problems.

[0054] Based on this, this specification proposes a solution: Figures 1-2 As shown, a seat cushion airbag of the present invention is provided with a gas generator outlet in a primary air guide bag 21. After the gas enters the primary air guide bag 21, the primary air guide bag 21 guides the gas to the two ends of the bag 10 and the secondary air guide bag 22, respectively. As a result, the edge of the bag 10 and the middle of the bag 10 are deployed at least simultaneously, or the edge of the bag 10 is deployed before the secondary air guide bag 22. The edge of the bag 10 supports the occupant's buttocks, keeping the occupant's buttocks stable, while preventing the rapid expansion of the middle of the bag 10 from causing discomfort to the occupant's buttocks or causing an unstable sitting posture.

[0055] Furthermore, by using the first stitch 30 and the second stitch 40, the expansion height of the receiving surface is limited to the same as that of the first-stage air guide bag 21 and the second-stage air guide bag 22, so that the upper surface of the bag 10 forms a roughly planar structure, thereby increasing the planar area of ​​the seat cushion airbag, so that the occupant's buttocks are evenly stressed, solving the problem in the prior art that the seat cushion airbag forms a hemispherical structure at the top after inflation, resulting in uneven actual stress on the occupant's buttocks.

[0056] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0057] like Figures 1-2 As shown, a seat cushion airbag of the present invention includes a bag 10 and an air guide bag 20 arranged in the bag 10. The bag 10 includes two oppositely arranged bag cloth pieces 11, one of which is provided with a bag mounting hole 12. The air guide bag 20 includes a first-level air guide bag 21 and at least one or two-level air guide bags 22 formed by cloth pieces. The first-level air guide bag 21 and the at least one or two-level air guide bags 22 are all arranged along the first direction of the bag 10. The first-level air guide bag 21 and the second-level air guide bag 22 are connected through a first air guide hole 23. Both ends of the first-level air guide bag 21 and the second-level air guide bag 22 in the second direction of the bag 10 are set as openings 24 to communicate with the internal cavity of the bag 10.

[0058] The first direction of the bag 10 may be the front-rear direction of the vehicle when the seat cushion airbag is installed on the vehicle, and the second direction of the bag 10 may be the left-right direction of the vehicle when the seat cushion airbag is installed on the vehicle.

[0059] The bag installation hole 12 is used to install the gas generator.

[0060] Among them, the air guide bag 20 is also provided with an air guide bag 20 installation hole, which is set corresponding to the first-level air guide bag 21. The air guide bag 20 installation hole is used to install the gas generator.

[0061] Among them, when the gas generator is installed in the mounting hole of the air guide bag 20 and the bag mounting hole 12, the air inlet of the gas generator is located in the first-level air guide bag 21, so that when the gas generator is ignited, the gas first enters the first-level air guide bag 21, and is guided and diverted by the first-level air guide bag 21 before entering the edge of the bag 10 and the second-level air guide bag 22.

[0062] Among them, when the seat cushion airbag is installed on the car seat, the first-level air guide bag 21 is located on the side close to the car seat back, and the second-level air guide bag 22 is located in the middle part of the seat cushion airbag, which is used to be set up corresponding to the upper and lower buttocks of the occupant.

[0063] In some embodiments, the primary air guide bag 21 and the secondary air guide bag 22 are two separate bag bodies, and the primary air guide bag 21 and the secondary air guide bag 22 are arranged sequentially along the first direction of the bag 10 and are connected through the first air guide hole 23.

[0064] In some embodiments, the first-level air guide bag 21 and the second-level air guide bag 22 can be two bags of different sizes. The first-level air guide bag 21 can be located inside the second-level air guide bag 22, so that after the first-level air guide bag 21 is ruptured by the gas generator, the second-level air guide bag 22 can still cooperate with the remaining part of the first-level air guide bag 21 to play a diversion role, thereby avoiding complete failure of the first-level air guide bag 21.

[0065] Specifically, after the gas generator is ignited and the gas enters the first-level air guide bag 21, the gas in the first-level air guide bag 21 can enter the edge of the bag 10 from the openings 24 at both ends of the first-level air guide bag 21, and move along the edge of the bag 10, so that the edge of the bag 10 unfolds; at the same time, the gas in the first-level air guide bag 21 enters the second-level air guide bag 22 from the first air guide hole 23, and causes the second-level air guide bag 22 to unfold. While unfolding, the second-level air guide bag 22 can drive the bag 10 to unfold, and the gas continues to enter the two ends of the bag 10 through the openings 24 at both ends of the second-level air guide bag 22, so that the edge of the bag 10 unfolds rapidly, and finally the edge of the bag 10 and the middle part of the bag 10 unfold almost at the same time, or the unfolding speed of the edge of the bag 10 is greater than the unfolding speed of the middle part of the bag 10.

[0066] Among them, the size of the first air guide hole 23 can be controlled to control the amount of gas in the first-level air guide bag 21 entering the second-level air guide bag 22, so as to control the deployment speed of the second-level air guide bag 22, that is, to control the deployment speed of the middle part of the bag 10.

[0067] Specifically, when the gas entering through the first air guide hole 23 is not enough to support the occupant's buttocks so that the secondary air guide bag 22 is fully deployed, the gas flowing to the two ends of the bag 10 through the first air guide bag 21 can enter the secondary air guide bag 22 through the openings 24 at both ends of the secondary air guide bag 22, so that the secondary air guide bag 22 can be fully deployed. At this time, since the gas at both ends of the bag 10 enters the secondary air guide bag 22 from the openings 24 at both ends of the secondary air guide bag 22, the edge of the bag 10 is undoubtedly deployed first. The bag 10 can wrap the member's buttocks to stabilize the occupant's sitting posture, and when the secondary air guide bag 22 is deployed and the middle part of the bag 10 is deployed at the same time, the occupant can also keep the body stable.

[0068] Furthermore, the cloth piece forming the first-level air guide bag 21 is sewn and fixed to the corresponding bag cloth piece 11 through the first stitch 30 and / or the cloth piece forming the second-level air guide bag 22 is sewn and fixed to the corresponding bag cloth piece 11 through the second stitch 40, and the first stitch 30 and the second stitch 40 are both arranged along the second direction of the bag 10; wherein, when the bag 10 and the air guide bag 20 are inflated, the first-level air guide bag 21 limits the thickness of the middle part of the bag 10 through the first stitch 30 and / or the second-level air guide bag 22 limits the thickness of the middle part of the bag 10 through the second stitch 40 to form a receiving surface on the bag 10.

[0069] Among them, the first suture 30 and the second suture 40 are used to bind the bag 10 with the first-level air guide bag 21 and the second-level air guide bag 22, so as to use the first-level air guide bag 21 and the second-level air guide bag 22 to limit the expansion height of the bag 10, thereby avoiding the bag 10 from expanding violently due to lack of constraint, affecting the stability of the occupant's sitting posture.

[0070] Specifically, when the seat cushion airbag is in a flat state, if the cloth piece forming the first-level air guide bag 21 and the cloth piece forming the second-level air guide bag 22 are both two pieces, at this time, the cloth piece of the first-level air guide bag 21 located above is sewn and fixed to the bag cloth piece 11 located above by the first stitch 30, and the cloth piece of the first-level air guide bag 21 located below is sewn and fixed to the bag cloth piece 11 located below by the first stitch 30; the cloth piece of the second-level air guide bag 22 located above is sewn and fixed to the bag cloth piece 11 located above by the second stitch 40, and the cloth piece of the second-level air guide bag 22 located below is sewn and fixed to the bag cloth piece 11 located below by the second stitch 40, so that the first-level air guide bag 21 can limit the expansion height of the bag 10 by the first stitch 30, and the second-level air guide bag 22 can limit the expansion height of the bag 10 by the second stitch 40.

[0071] Among them, since there is a preset distance between the first suture 30 and the second suture 40 in the first direction and they do not overlap, when the bag 10 is inflated, the receiving surface is formed on the bag 10 between the first suture 30 and the second suture 40 and around it, and the height of the receiving surface is similar to or equal to the expansion height of the first-level air guide bag 21 and the second-level air guide bag 22.

[0072] Among them, since the first stitch 30 and the second stitch 40 cooperate with the first-level air guide bag 21 and the second-level air guide bag 22 to limit the middle part of the bag 10, the highest point of the original expansion in the middle of the bag 10 is limited to be equal to or close to the expansion height of the second-level air guide bag 22, thereby reducing the expansion height difference between the middle part of the bag 10 and the edge part of the bag 10, so that the surface of the bag 10 facing the occupant forms a roughly flat structure or a slightly convex / concave structure, so as to make the occupant's sitting posture more stable during an expansion event and prevent the occupant from diving or moving left and right.

[0073] The present invention uses a first-level air guide bag 21 to drain the gas released by the gas generator so that the edge of the bag 10 and the middle part of the bag 10 expand and unfold at least simultaneously or the edge of the bag 10 expands before the middle part of the bag 10, and limits the height of the middle part of the bag 10 through the first suture 30, the second suture 40, the first-level air guide bag 21 and the second-level air guide bag 22 so that the height of the middle part of the bag 10 approaches the height of the edge part of the bag 10, so that the side of the bag 10 facing the occupant forms a roughly planar structure, thereby increasing the area of ​​the planar area to stabilize the occupant's sitting posture during an expansion event, solving the problem that the existing seat cushion airbag forms a hemispherical structure at the top after expansion, causing uneven force on the occupant's buttocks.

[0074] Furthermore, there is a first preset distance between the first suture 30 and the end of the first-level air guide bag 21 close to the second-level air guide bag 22; there is a second preset distance between the second suture 40 and the end of the second-level air guide bag 22 away from the first-level air guide bag 21. The first preset distance and the second preset distance are used to limit the inflation thickness of the middle part of the bag 10 and the length of the receiving surface.

[0075] The distance between the first suture 30 and the second suture 40 can also be adjusted to adjust the length of the receiving surface.

[0076] Specifically, when the first preset distance and the second preset distance are smaller, the inflated thickness / expanded thickness of the middle part of the pouch 10 is also smaller; when the first preset distance and the second preset distance are larger, the inflated thickness / expanded thickness of the middle part of the pouch 10 is also larger.

[0077] In some embodiments, the lengths of the primary air guide bag 21 and the secondary air guide bag 22 can be adjusted to adjust the inflation thickness of the primary air guide bag 21 and the secondary air guide bag 22, and then the inflation thickness of the middle part of the bag 10, that is, the inflation thickness of the receiving surface, can be adjusted.

[0078] Furthermore, the first suture 30 has a first preset length along the second direction, and the second suture 40 has a second preset length along the second direction. The first preset length and the second preset length are used to limit the width of the receiving surface.

[0079] The first preset length of the first suture 30 and the second preset length of the second suture 40 are used to limit the binding size of the bag 10 and the primary air guide bag 21 and the secondary air guide bag 22 .

[0080] For example, the greater the first preset length and the second preset length are, the greater the width of the receiving surface is; and the smaller the first preset length and the second preset length are, the smaller the width of the receiving surface is.

[0081] In some embodiments, the first suture 30 and the second suture 40 may be arc-shaped to accommodate the occupant's hips, so that the formed receiving surface has an overall circular or elliptical structure to better accommodate the occupant's hip curve.

[0082] For example, when the first suture 30 and the second suture 40 are both arc-shaped structures, a “()” structure is formed between the first suture 30 and the second suture 40 .

[0083] In some embodiments, the air guide bag 20 includes two oppositely disposed first air guide fabric panels 25 and two oppositely disposed second air guide fabric panels 26 . Among them, the two first air guide cloth pieces 25 are closed at both ends of the bag 10 in the first direction to form a first-level air guide bag 21, and the first-level air guide bag 21 is provided with openings 24 at both ends of the bag 10 in the second direction to communicate with the internal cavity of the bag 10, and the first-level air guide bag 21 is provided with a first air guide hole 23; the two second air guide cloth pieces 26 are closed at both ends of the bag 10 in the first direction to form a second-level air guide bag 22, and the second-level air guide bag 22 is provided with openings 24 at both ends of the bag 10 in the second direction to communicate with the internal cavity of the bag 10; wherein, the length of the second air guide cloth piece 26 in the first direction of the bag 10 is greater than the length of the first air guide cloth piece 25 in the first direction of the bag 10, the first-level air guide bag 21 is placed at one end inside the second-level air guide bag 22 and forms a reserved air guide cavity 27 inside the second-level air guide bag 22, and the first-level air guide bag 21 is communicated with the reserved air guide cavity 27 through the first air guide hole 23.

[0084] Among them, after the two first air guide cloth pieces 25 are aligned and overlapped, the two ends of the two first air guide cloth pieces 25 are sewn together to directly form a first-level air guide bag 21. Since the two ends of the first-level air guide bag 21 in the second direction are not sewn together, two openings 24 are directly formed and connected to the internal cavity of the bag 10.

[0085] The first air guide holes 23 can be reserved and formed by sewing two first air guide fabric pieces 25 together to form the first-level air guide bag 21 .

[0086] Among them, a first air guide cloth sheet 25 is provided with an air guide bag 20 mounting hole for mounting a gas generator.

[0087] The second air guide fabric piece 26 forms the secondary air guide bag 22 in the same manner as the first air guide fabric piece 25 forms the primary air guide bag 21 .

[0088] A second air guide fabric sheet 26 is provided with an air guide bag 20 mounting hole for mounting a gas generator.

[0089] Among them, since the size of the first-level air guide bag 21 is smaller than that of the second-level air guide bag 22, the first-level air guide bag 21 is used to drain the gas released by the gas generator, and the reserved air guide cavity 27 is set corresponding to the upper and lower parts of the occupant's buttocks to protect the occupant's buttocks.

[0090] Among them, by putting the first-level air guide bag 21 into the second-level air guide bag 22, when the first-level air guide bag 21 is ruptured by the high-temperature and high-pressure gas and high-temperature residue of the gas generator, the second-level air guide bag 22 can continue to play a diversion role to maintain the overall functional integrity of the air guide bag 20.

[0091] Specifically, after the inflator is detonated and gas enters the primary airbag 21, it directs the gas through the first air guide hole 23 toward the reserved air guide cavity 27. The reserved air guide cavity 27 expands to protect the occupant's buttocks. Simultaneously, the primary airbag 21 directs the gas toward the two ends of the bladder 10, allowing it to rapidly expand. If the reserved air guide cavity 27 is insufficient for expansion, gas at both ends of the bladder 10 can enter the reserved air guide cavity 27, causing it to expand.

[0092] like Figures 3-10 As shown, the first air guide cloth piece 25 is sewn and fixed to the corresponding second air guide cloth piece 26 and the pouch cloth piece 11 through a first stitch 30; the second air guide cloth piece 26 is sewn and fixed to the corresponding pouch cloth piece 11 through a second stitch 40, and the second stitch 40 is located on one side of the reserved air guide cavity 27.

[0093] Preferably, in order to enhance the strength of the first air guide fabric sheet 25 and the second air guide fabric sheet 26 , both the first air guide fabric sheet 25 and the second air guide fabric sheet 26 have a double-layer structure.

[0094] Furthermore, a second air guide hole 28 is opened at one end of the reserved air guide cavity 27 away from the first-level air guide bag 21. The second air guide hole 28 is used to guide the gas in the reserved air guide cavity 27 to the end of the bag 10 away from the first-level air guide bag 21.

[0095] Among them, when the gas in the reserved air guide cavity 27 is sufficient, the gas in the reserved air guide cavity 27 can flow to the end of the bag 10 away from the first-level air guide bag 21, so that the end of the bag 10 away from the first-level air guide bag 21 can expand and unfold to prevent the occupant from diving; when the gas in the reserved air guide cavity 27 is not enough to make the end of the bag 10 away from the first-level air guide bag 21 fully unfold, the reserved air guide cavity 27 can slightly bulge toward the end of the bag 10 away from the first-level air guide bag 21 through the second air guide hole 28, so that the gas at both ends of the bag 10 can quickly enter the end of the bag 10 away from the first-level air guide bag 21, so that the end of the bag 10 away from the first-level air guide bag 21 can quickly bulge.

[0096] Furthermore, each pouch cloth piece 11 is composed of at least two layers; the first air guide cloth piece 25 is sewn and fixed to the corresponding second air guide cloth piece 26 and at least one layer of corresponding pouch cloth piece 11 through a first stitch 30; the second air guide cloth piece 26 is sewn and fixed to at least one layer of corresponding pouch cloth piece 11 through a second stitch 40.

[0097] Among them, by setting the pouch cloth piece 11 into two layers, the strength of the pouch cloth piece 11 is increased, and when only the inner pouch cloth piece 11 is sewn by the first stitch 30 or the second stitch 40, when the inner pouch cloth piece 11 is torn, the outer cloth piece can also maintain the functional integrity of the pouch 10.

[0098] Preferably, the two first air guide fabric pieces 25 are integrally connected, the two second air guide fabric pieces 26 are integrally connected, and the two bag fabric pieces 11 are integrally connected to save processing technology.

[0099] The seat cushion airbag of the present invention also includes a first weakened sewn portion 50 and a second weakened sewn portion 60. The first weakened sewn portion 50 is sewn onto the primary air guide bag 21 and corresponds to the first air guide hole 23. It is used to direct gas to flow preferentially to the sides of the bag 10, allowing the edges of the bag 10 to expand before the secondary air guide bag 22 and the middle of the bag 10, thereby enclosing the occupant's buttocks and facilitating a stable sitting posture. The second weakened sewn portion 60 is sewn onto the secondary air guide bag 22 and corresponds to the second air guide hole 28. It is used to direct gas within the secondary air guide bag 22 or the reserved air guide cavity 27 to flow to the sides of the bag 10, allowing the edges of the bag 10 to expand quickly.

[0100] The first weakened sewn portion 50 is sewn between the two first air guide fabric sheets 25 and corresponds to the first air guide holes 23 in front and back, and can be broken under the impact of gas.

[0101] The second weakened sewn portion 60 is sewn between the two second air guide fabric sheets 26 and corresponds to the second air guide holes 28 in front and back, and can be broken by the impact of gas.

[0102] Preferably, the stitch strength of the second weakened sewn portion 60 is smaller than the stitch strength of the first weakened sewn portion 50 .

[0103] A working principle of the present invention is as follows:

[0104] After the gas generator is installed in the mounting hole of the air guide bag 20 and the bag mounting hole 12, if the gas generator is detonated, the gas enters the primary air guide bag 21, and the primary air guide bag 21 guides the gas to the edge of the bag 10 and the secondary air guide bag 22;

[0105] Because the openings 24 at both ends of the primary air bag 21 are larger than the first air guide holes 23 , the edge of the bag 10 deploys faster than the middle of the bag 10 . As a result, during the deployment of the bag 10 , the edge of the bag 10 wraps around the occupant's buttocks to maintain stability.

[0106] When the gas at both ends of the bag 10 flows toward the middle of the bag 10 (the secondary air guide bag 22 or the reserved air guide cavity 27), since the middle of the bag 10 is restricted by the first suture 30 and the second suture 40, the expansion height of the middle of the bag 10 is the same as the expansion size of the secondary air guide bag 22 or the reserved air guide cavity 27, so that a roughly planar structure is formed on the bag 10 to provide stable support for the occupant's buttocks.

[0107] The present invention adds an air guide bag 20 to the airbag and optimizes its air outlet direction through stitching, thereby constraining the thicker area in the center of the bag 10, thereby controlling the thickness of the bag 10. This not only solves the problem of seat cushion airbag integrity but also controls the deployed thickness of the seat cushion airbag, increasing the flat surface area of ​​the deployed seat cushion airbag and the flat surface area contacted by the lower pelvis, thereby more evenly applying force to the occupant's buttocks.

[0108] In this specification, references to the same or similar parts between the various embodiments can be made to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0109] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A seat cushion airbag, comprising a bag and an air guide bag disposed in the bag, wherein the bag comprises two oppositely disposed bag cloth pieces, one of which is provided with a bag mounting hole, characterized in that: The air guide bag includes a primary air guide bag and at least one secondary air guide bag formed by a cloth piece, the primary air guide bag and the at least one secondary air guide bag are both arranged along a first direction of the sac, the primary air guide bag and the secondary air guide bag are connected through a first air guide hole, and both ends of the primary air guide bag and the secondary air guide bag in the second direction of the sac are set to be open to communicate with the internal cavity of the sac; The fabric piece forming the primary air guide bag is sewn and fixed to the corresponding bladder bag fabric piece by a first stitching line, and / or the fabric piece forming the secondary air guide bag is sewn and fixed to the corresponding bladder bag fabric piece by a second stitching line, and both the first stitching line and the second stitching line are arranged along the second direction of the bladder bag; When the bladder bag and the air guide bag are inflated, gas flows to the edge of the bladder bag through the openings at both ends of the primary air guide bag and flows to the secondary air guide bag through the first air guide hole. The thickness of the middle portion of the bladder bag is limited by the first stitching of the primary air guide bag and / or the second stitching of the secondary air guide bag, so as to form a receiving surface on the bladder bag. A first preset distance is defined between the first suture and an end of the primary air guide bag close to the secondary air guide bag; a second preset distance is defined between the second suture and an end of the secondary air guide bag away from the primary air guide bag, wherein the first preset distance and the second preset distance are used to limit the inflated thickness of the middle portion of the bag and the length of the receiving surface; The first suture has a first preset length along the second direction, and the second suture has a second preset length along the second direction. The first preset length and the second preset length are used to limit the width of the receiving surface.

2. The seat cushion airbag according to claim 1, characterized in that: The air guide bag comprises: Two first air guide fabric pieces are arranged opposite to each other, and the two first air guide fabric pieces are closed at both ends of the pouch in the first direction to form a primary air guide bag, and the primary air guide bag has openings at both ends of the pouch in the second direction to communicate with the internal cavity of the pouch, and the primary air guide bag is provided with the first air guide hole; Two second air guide fabric sheets are arranged opposite to each other, and the two second air guide fabric sheets are closed at both ends of the pouch in the first direction to form a secondary air guide bag, and the secondary air guide bag has openings at both ends of the pouch in the second direction to communicate with the internal cavity of the pouch; Among them, the length of the second air guide cloth piece in the first direction of the sac is greater than the length of the first air guide cloth piece in the first direction of the sac, the first-level air guide bag is placed at one end of the second-level air guide bag and a reserved air guide cavity is formed in the second-level air guide bag, and the first-level air guide bag is connected to the reserved air guide cavity through the first air guide hole.

3. The seat cushion airbag according to claim 2, characterized in that: The first air guide fabric piece is sewn and fixed to the corresponding second air guide fabric piece and the pouch fabric piece through the first stitching line.

4. The seat cushion airbag according to claim 3, characterized in that: A second air guide hole is provided at one end of the reserved air guide cavity away from the first-level air guide bag, and the second air guide hole is used to guide the gas in the reserved air guide cavity to the end of the bag away from the first-level air guide bag.

5. The seat cushion airbag according to claim 4, characterized in that: Each of the pouch fabric sheets is composed of at least two layers; The first air guide fabric sheet is sewn and fixed to the corresponding second air guide fabric sheet and at least one layer of the corresponding pouch fabric sheet by using the first stitching line; The second air guide fabric sheet is sewn and fixed to at least one corresponding pouch fabric sheet through the second stitching line.

6. The seat cushion airbag according to claim 5, characterized in that: The two first air guide fabric pieces are connected as one piece, the two second air guide fabric pieces are connected as one piece, and the two bag fabric pieces are connected as one piece.

7. The seat cushion airbag according to any one of claims 1 to 6, characterized in that: Also includes: A first weakened sewing portion is sewn on the first-level air guide bag and is arranged corresponding to the first air guide hole.

8. The seat cushion airbag according to any one of claims 4 to 6, characterized in that: Also includes: A second weakened sewing portion is sewn on the secondary air guide bag and is arranged corresponding to the second air guide hole.

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