Cushion air bag

Abstract

The invention discloses a cushion air bag which comprises a bag body and an air guide bag arranged in the bag body, the air guide bag comprises a first-stage air guide bag body and at least one second-stage air guide bag body which are formed through cloth pieces, and the first-stage air guide bag body and the at least one second-stage air guide bag body are arranged in the first direction of the bag body. The first-stage air guide bag and the second-stage air guide bag are communicated through a first air guide hole, and the two ends, in the second direction of the bag, of the first-stage air guide bag and the two ends, in the second direction of the bag, of the second-stage air guide bag are both provided with openings so as to be communicated with an inner cavity of the bag; the cloth piece forming the first-stage air guide bag and the corresponding bag cloth piece are sewn and fixed through a first sewing thread, and / or the cloth piece forming the second-stage air guide bag and the corresponding bag cloth piece are sewn and fixed through a second sewing thread, and the first sewing thread and the second sewing thread are arranged in the second direction of the bag. The supporting capacity for the buttocks of the passenger is improved, and the problem that in the prior art, a plane structure formed after the bag is unfolded enables the buttocks of the passenger to be stressed unevenly is solved.

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 smart cockpits, the riding scenes and sitting postures of passengers in cars have also changed greatly. For example, as the tilt angle of the seats in the car changes, passengers will sit in a large tilted posture. Compared with the conventional sitting posture, when the vehicle is impacted, the large tilted sitting posture is more likely to cause the passengers to dive, resulting in increased spinal force, increased abdominal pressure, and seat belt strangulation. Therefore, in order to prevent passengers from diving when the vehicle is impacted, anti-diving air cushions are usually installed on the passenger seats.

[0003] The existing anti-submarine air cushion is usually made of two oppositely arranged cloth pieces that are aligned and sewn together, and a generator hole is reserved. Therefore, after the gas generator is ignited to inflate the anti-submarine air cushion, a hemispherical structure will be formed on the side of the anti-submarine air cushion facing the occupant. Since the anti-submarine air cushion has a large internal pressure after being inflated, the contact area between the anti-submarine air cushion and the occupant's buttocks is reduced, resulting in uneven force on the occupant's buttocks, and finally the occupant is still 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 expansion, resulting in uneven force on the occupant's buttocks.

[0006] The embodiment of the present invention provides the following technical solutions:

[0007] An embodiment of the present invention provides a seat cushion airbag, comprising a bag and an air guide bag arranged in the bag, wherein the bag comprises two bag cloth pieces arranged opposite to each other, wherein one of the bag cloth pieces is provided with a bag installation hole, the air guide bag comprises 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 are both arranged along a first direction of the bag, the primary air guide bag and the secondary air guide bag are communicated with each other 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 bag are both arranged with openings to communicate with the internal cavity of the bag;

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

[0009] Wherein, when the sac and the air guide bag are inflated, the gas flows to the edge portion of the sac through the openings at both ends of the first-level air guide bag, and flows to the second-level air guide bag through the first air guide hole. The first-level air guide bag limits the thickness of the middle portion of the sac through the first stitch and / or the second-level air guide bag limits the thickness of the middle portion of the sac through the second stitch to form a receiving surface on the sac.

[0010] Furthermore, a first preset distance is provided between the first suture and an end of the first-level air guiding bag close to the second-level air guiding bag; a second preset distance is provided between the second suture and an end of the second-level air guiding bag away from the first-level air guiding bag, and the first preset distance and the second preset distance are used to limit the inflation thickness of the middle part of the bag and the length of the receiving surface.

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

[0012] Furthermore, the air guide bag comprises:

[0013] Two first air guide fabrics are arranged opposite to each other, and the two first air guide fabrics are closed at two ends of the bag in the first direction to form a primary air guide bag, and the primary air guide bag is provided with openings at two ends of the bag in the second direction to communicate with the internal cavity of the bag, and the primary air guide bag is provided with the first air guide hole;

[0014] Two second air guide fabrics are arranged opposite to each other, and the two second air guide fabrics are closed at two ends of the bag in the first direction to form a secondary air guide bag, and the two ends of the secondary air guide bag in the second direction are provided with openings to communicate with the internal cavity of the bag;

[0015] Among them, the length of the second air guiding cloth piece in the first direction of the sac is greater than the length of the first air guiding cloth piece in the first direction of the sac, the first-level air guiding bag is placed at one end of the second-level air guiding bag and a reserved air guiding cavity is formed in the second-level air guiding bag, and the first-level air guiding bag is connected to the reserved air guiding cavity through the first air guiding hole.

[0016] Furthermore, the first air guide fabric piece is sewn and fixed to the corresponding second air guide fabric piece and the bladder fabric piece through the first stitching line.

[0017] Furthermore, a second air guide hole is opened at one end of the reserved air guide cavity 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 the end of the bag away from the primary air guide bag.

[0018] Furthermore, each of the pouch cloth sheets has at least two layers;

[0019] 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 means of the first stitching line;

[0020] The second air guide fabric sheet is sewn and fixed to at least one corresponding layer of the bladder fabric sheet through the second stitching line.

[0021] Furthermore, the two first air guide fabric pieces are integrally connected, the two second air guide fabric pieces are integrally connected, and the two bladder fabric pieces are integrally connected.

[0022] Furthermore, it also includes:

[0023] A first weakened sewing portion, wherein the first weakened sewing portion is sewn on the primary air guide bag and is arranged corresponding to the first air guide hole.

[0024] Furthermore, it also includes:

[0025] A second weakened sewing portion, wherein the second weakened sewing portion is sewn on the secondary air guide bag and is arranged corresponding to the second air guide hole.

[0026] Compared with the prior art, the at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects:

[0027] A seat cushion airbag of the present invention is provided with a primary air guide bag and a secondary air guide bag inside the bag, so that after 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 is deployed before the middle of the bag, so as to achieve the encirclement of the occupant's buttocks, and avoid the middle part from being deployed quickly to cause discomfort to the occupant's buttocks or affect the occupant's sitting posture stability;

[0028] Furthermore, since the primary air bag is sewn and fixed to the corresponding bag cloth piece by the first stitch, and the secondary air bag is sewn and fixed to the corresponding bag cloth piece by the second stitch, when the bag is unfolded, its expansion height is limited to close to the primary air bag and the secondary air bag under the action of the first stitch and the second stitch, thereby forming a receiving surface on the upper surface of the bag, and the receiving surface is a roughly planar structure, so as to solve the problem of uneven force on the occupant's buttocks due to the planar structure formed after the bag is unfolded in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 paying 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 (I) 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 (III) of a seat cushion airbag according to an embodiment of the present invention;

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

[0036] Figure 7 A specific implementation mode (V) of a seat cushion airbag according to an embodiment of the present invention;

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

[0038] Fig. 9 A specific implementation manner (VII) of a seat cushion airbag according to an embodiment of the present invention;

[0039] Fig.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 cloth piece; 12. bladder bag installation hole;

[0042] 20. air guide bag; 21. primary air guide bag; 22. secondary air guide bag; 23. first air guide hole; 24. opening; 25. first air guide cloth sheet; 26. second air guide cloth sheet; 27. reserved air guide cavity; 28. second air guide hole;

[0043] 30. First suture;

[0044] 40. Second suture;

[0045] 50. A 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 implementation methods 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 implementation methods, 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 following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present 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 the present 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 the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device 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 drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0051] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0052] Since the existing seat cushion airbag has a lack of 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, which will undoubtedly affect the sitting posture of the occupant 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 cause potential danger to the occupant.

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

[0054] Based on this, this specification embodiment proposes a processing solution: Figures 1-2 As shown, a seat cushion airbag of the present invention is provided with a gas outlet of a gas generator in a primary air guide bag 21, and 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, so that the edge of the bag 10 and the middle of the bag 10 are at least simultaneously unfolded or the edge of the bag 10 is unfolded before the secondary air guide bag 22, so that the edge of the bag 10 supports the buttocks of the occupant, so that the buttocks of the occupant are kept stable, and at the same time, the middle of the bag 10 is prevented from rapidly expanding, causing discomfort to the buttocks of the occupant or causing the occupant to have 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 primary air guide bag 21 and the secondary air guide bag 22, so that the upper surface of the bag 10 forms a roughly planar structure, so as to increase the planar area of ​​the seat cushion airbag, so that the occupant's buttocks are evenly stressed, thereby 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 technical solutions provided by various embodiments of the present application are described below 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 bag cloth pieces 11 arranged opposite to each other, one of the bag cloth pieces 11 is provided with a bag mounting hole 12, the air guide bag 20 includes a primary air guide bag 21 and at least one or two secondary air guide bags 22 formed by cloth pieces, the primary air guide bag 21 and at least one or two secondary air guide bags 22 are both arranged along a first direction of the bag 10, the primary air guide bag 21 and the secondary air guide bag 22 are connected through a first air guide hole 23, and both ends of the primary air guide bag 21 and the secondary air guide bag 22 in the second direction of the bag 10 are arranged as openings 24 to be connected 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, the air guide bag 20 installation hole is set corresponding to the first-level air guide bag 21, and 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 of the embodiments, the primary air guiding bag 21 and the secondary air guiding bag 22 are two separate bag bodies, and the primary air guiding bag 21 and the secondary air guiding bag 22 are arranged in sequence along the first direction of the bag 10 and are connected through the first air guiding hole 23.

[0064] In some of the embodiments, the first-level air guide bag 21 and the second-level air guide bag 22 can be two bags of different sizes, and 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 guiding 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 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 sufficient to support the occupant's buttocks so that the secondary air guide bag 22 can be fully deployed, the gas flowing to the two ends of the bag 10 through the primary 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 will undoubtedly be 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 primary air guide bag 21 is sewn and fixed to the corresponding bag cloth piece 11 by a first stitch 30 and / or the cloth piece forming the secondary air guide bag 22 is sewn and fixed to the corresponding bag cloth piece 11 by a 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 primary air guide bag 21 limits the thickness of the middle part of the bag 10 by the first stitch 30 and / or the secondary air guide bag 22 limits the thickness of the middle part of the bag 10 by the second stitch 40, so as 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 to the primary air bag 21 and the secondary air bag 22, so as to use the primary air bag 21 and the secondary air bag 22 to limit the expansion height of the bag 10, thereby preventing the bag 10 from expanding violently due to lack of restraint and 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 primary air guide bag 21 and the cloth piece forming the secondary air guide bag 22 are both two pieces, at this time, the cloth piece of the primary air guide bag 21 located at the top is sewn and fixed to the bag cloth piece 11 located at the top by the first stitch 30, and the cloth piece of the primary air guide bag 21 located at the bottom is sewn and fixed to the bag cloth piece 11 located at the bottom by the first stitch 30; the cloth piece of the secondary air guide bag 22 located at the top is sewn and fixed to the bag cloth piece 11 located at the top by the second stitch 40, and the cloth piece of the secondary air guide bag 22 located at the bottom is sewn and fixed to the bag cloth piece 11 located at the bottom by the second stitch 40, so that the primary air guide bag 21 can limit the expansion height of the bag 10 by the first stitch 30, and the secondary air guide bag 22 limits 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, a 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 primary air guide bag 21 and the secondary air guide bag 22 to limit the middle part of the bag 10, the highest point in the middle of the bag 10 that was originally inflated is limited to be equal to or close to the inflation height of the secondary air guide bag 22, thereby reducing the inflation 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 planar structure or a slightly convex / concave structure, so as to make the occupant's sitting posture more stable during an inflation 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 region to stabilize the occupant's sitting posture during an expansion event, and solves the problem that the existing seat cushion airbag forms a hemispherical structure at the top after expansion, causing uneven actual force on the occupant's buttocks.

[0074] Furthermore, there is a first preset distance between the first suture 30 and one 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 one end of the second-level air guide bag 22 away from the first-level air guide bag 21, and 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 may 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 bladder 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 bladder 10 is also larger.

[0077] In some of the embodiments, the inflation thickness of the primary air guide bag 21 and the secondary air guide bag 22 can be adjusted by adjusting the length 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] Further, 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, and 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 with 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 of the embodiments, the first stitch 30 and the second stitch 40 may be arc-shaped to accommodate the hips of the occupant, so that the formed receiving surface has an overall circular or elliptical structure to better cope with the hip curve of the occupant.

[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 of the embodiments, the air guide bag 20 includes two first air guide fabric sheets 25 and two second air guide fabric sheets 26 that are oppositely disposed. Among them, the two first air guiding cloth pieces 25 are closed at both ends of the bag 10 in the first direction to form a first-level air guiding bag 21, and the first-level air guiding 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 guiding bag 21 is provided with a first air guiding hole 23; the two second air guiding cloth pieces 26 are closed at both ends of the bag 10 in the first direction to form a second-level air guiding bag 22, and the second-level air guiding 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 guiding cloth piece 26 in the first direction of the bag 10 is greater than the length of the first air guiding cloth piece 25 in the first direction of the bag 10, the first-level air guiding bag 21 is placed at one end in the second-level air guiding bag 22 and a reserved air guiding cavity 27 is formed in the second-level air guiding bag 22, and the first-level air guiding bag 21 is connected with the reserved air guiding cavity 27 through the first air guiding 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, and because 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 hole 23 can be reserved and formed by sewing two first air guide fabric pieces 25 together to form the primary air guide bag 21 .

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

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

[0088] A second air guide fabric sheet 26 is provided with an air guide bag 20 installation hole for installing 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 guiding role to maintain the overall functional integrity of the air guide bag 20.

[0091] Specifically, after the gas generator is detonated and the gas enters the primary air guide bag 21, the primary air guide bag 21 guides the gas to the reserved air guide cavity 27 through the first air guide hole 23, and the reserved air guide cavity 27 expands to protect the buttocks of the occupant; at the same time, the primary air guide bag 21 guides the gas to the two end edges of the bag 10, so that the two end edges of the bag 10 are quickly expanded. If the cavity in the reserved air guide cavity 27 is not enough for the reserved air guide cavity 27 to expand, the gas at both ends of the bag 10 can enter the reserved air guide cavity 27 to expand the reserved air guide cavity 27.

[0092] like Figures 3 to 10 As shown, the first air guide fabric piece 25 is sewn and fixed to the corresponding second air guide fabric piece 26 and the pouch fabric piece 11 by a first stitch 30; the second air guide fabric piece 26 is sewn and fixed to the corresponding pouch fabric piece 11 by 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 primary air guide bag 21 , and 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 primary air guide bag 21 .

[0095] Among them, when the gas in the reserved air guiding cavity 27 is sufficient, the gas in the reserved air guiding cavity 27 can flow to the end of the bag 10 away from the first-level air guiding bag 21, so that the end of the bag 10 away from the first-level air guiding bag 21 expands and unfolds to prevent the occupants from diving; when the gas in the reserved air guiding cavity 27 is insufficient to fully unfold the end of the bag 10 away from the first-level air guiding bag 21, the reserved air guiding cavity 27 can slightly bulge toward the end of the bag 10 away from the first-level air guiding bag 21 through the second air guiding 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 guiding bag 21, so that the end of the bag 10 away from the first-level air guiding bag 21 quickly bulges.

[0096] Furthermore, each pouch cloth piece 11 has 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 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 corresponding pouch cloth piece 11 through a second stitch 40.

[0097] Among them, by setting the pouch cloth piece 11 as 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 further comprises a first weakened sewing portion 50 and a second weakened sewing portion 60. The first weakened sewing portion 50 is sewn on the primary air guide bag 21 and is arranged corresponding to the first air guide hole 23, so as to make the gas flow to the two sides of the bag 10 first, so that the edge of the bag 10 is unfolded before the secondary air guide bag 22 and the middle of the bag 10, so as to surround the buttocks of the occupant, and facilitate the occupant's sitting posture to be stable; the second weakened sewing portion 60 is sewn on the secondary air guide bag 22 and is arranged corresponding to the second air guide hole 28, so as to guide the gas in the secondary air guide bag 22 or the reserved air guide cavity 27 to flow to the two sides of the bag 10, so that the edge of the bag 10 is unfolded quickly.

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

[0101] The second weakened sewing portion 60 is sewn between the two second air guide fabric sheets 26 and corresponds to the second air guide hole 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 into 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] Since the size of the openings 24 at both ends of the primary air guide bag 21 is larger than the size of the first air guide hole 23, the edge deployment speed of the bag 10 is greater than the deployment speed of the middle part of the bag 10, so that during the deployment of the bag 10, the edge of the bag 10 wraps around the occupant's buttocks to maintain the stability of the occupant's buttocks;

[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 air bag and optimizes the air outlet direction of the air guide bag 20 by stitching, so as to constrain the original thicker area in the middle of the bag 10, so as to control the thickness of the bag 10. The present invention not only solves the problem of the integrity of the seat cushion airbag, but also controls the unfolding thickness of the seat cushion airbag, so that the plane area of ​​the seat cushion airbag after unfolding becomes larger, and the plane area contacted by the lower part of the pelvis becomes larger, so that the force on the occupant's buttocks is more evenly applied.

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

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

Claims

1. A seat cushion airbag, comprising a bag and an air guide bag arranged in the bag, wherein the bag comprises two oppositely arranged bag cloth pieces, one of which is provided with a bag installation 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 sheet, the primary air guide bag and at least one secondary air guide bag are both arranged along a first direction of the bag, 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 a second direction of the bag are both arranged to be openings so as to be connected with the internal cavity of the bag; The cloth piece forming the primary air guide bag is sewn and fixed with the corresponding cloth piece of the bladder bag by a first stitch and / or the cloth piece forming the secondary air guide bag is sewn and fixed with the corresponding cloth piece of the bladder bag by a second stitch, and the first stitch and the second stitch are both arranged along the second direction of the bladder bag; Wherein, when the sac and the air guide bag are inflated, the gas flows to the edge portion of the sac through the openings at both ends of the first-level air guide bag, and flows to the second-level air guide bag through the first air guide hole. The first-level air guide bag limits the thickness of the middle portion of the sac through the first stitch and / or the second-level air guide bag limits the thickness of the middle portion of the sac through the second stitch to form a receiving surface on the sac.

2. The seat cushion airbag according to claim 1, characterized in that: There is a first preset distance between the first suture and an end of the first-level air guiding bag close to the second-level air guiding bag; there is a second preset distance between the second suture and an end of the second-level air guiding bag away from the first-level air guiding bag, and the first preset distance and the second preset distance are used to limit the inflation thickness of the middle part of the bag and the length of the receiving surface.

3. The seat cushion airbag according to claim 2, characterized in that: 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.

4. The seat cushion airbag according to claim 3, characterized in that: The air guide bag comprises: Two first air guide fabrics are arranged opposite to each other, and the two first air guide fabrics are closed at two ends of the bag in the first direction to form a primary air guide bag, and the primary air guide bag is provided with openings at two ends of the bag in the second direction to communicate with the internal cavity of the bag, and the primary air guide bag is provided with the first air guide hole; Two second air guide fabrics are arranged opposite to each other, and the two second air guide fabrics are closed at two ends of the bag in the first direction to form a secondary air guide bag, and the two ends of the secondary air guide bag in the second direction are provided with openings to communicate with the internal cavity of the bag; Among them, the length of the second air guiding cloth piece in the first direction of the sac is greater than the length of the first air guiding cloth piece in the first direction of the sac, the first-level air guiding bag is placed at one end of the second-level air guiding bag and a reserved air guiding cavity is formed in the second-level air guiding bag, and the first-level air guiding bag is connected to the reserved air guiding cavity through the first air guiding hole.

5. The seat cushion airbag according to claim 4, characterized in that: The first air guide fabric piece is sewn and fixed to the corresponding second air guide fabric piece and the bladder fabric piece through the first stitching line.

6. The seat cushion airbag according to claim 5, characterized in that: A second air guide hole is formed at one end of the reserved air guide cavity 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 the end of the bag away from the primary air guide bag.

7. The seat cushion airbag according to claim 6, characterized in that: Each of the pouch fabric sheets has 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 means of the first stitching line; The second air guide fabric sheet is sewn and fixed to at least one corresponding layer of the bladder fabric sheet through the second stitching line.

8. The seat cushion airbag according to claim 7, 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 bladder fabric pieces are connected as one piece.

9. The seat cushion airbag according to any one of claims 1 to 8, characterized in that: Also includes: A first weakened sewing portion, wherein the first weakened sewing portion is sewn on the primary air guide bag and is arranged corresponding to the first air guide hole.

10. The seat cushion airbag according to any one of claims 6 to 8, characterized in that: Also includes: A second weakened sewing portion, wherein the 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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