Side air curtain

Abstract

The invention discloses a side air curtain which comprises a bag and an air guide bag, at least one protection cavity is formed in the bag, the air guide bag is arranged in the bag, at least one air outlet of the air guide bag faces an air inlet of the protection cavity, the bag further comprises a plurality of sewing areas, and the sewing areas are sewn at the top end of the bag at intervals. A plurality of thickness reducing areas are formed at the top end of the bag, a plurality of buffer areas are formed between the sewing areas and top end sewing threads of the bag, a first-stage air guide opening communicated with the buffer areas is formed between the top end sewing threads of each sewing area and the top end sewing threads of the bag, and the expansion size of the first-stage air guide opening is smaller than that of an air inlet of the protection cavity. And the air flowing out of the air outlet of the air guide bag is shunted. According to the side air curtain, the multiple thickness reducing areas are formed at the top end of the bag when the bag is inflated so as to avoid the automobile ceiling interior trim part, and the problem that in the prior art, after the side air curtain is unfolded, the top of the side air curtain easily impacts the ceiling interior trim part, and consequently the ceiling interior trim part is disengaged is solved.

Description

Technical Field

[0001] The invention relates to the technical field of safety airbags, and in particular to a side air curtain. Background Art

[0002] Side curtain airbags are usually installed between the A-pillar and C-pillar of a car, and between the roof and the crossbeam of the car, so that when a car crashes, they are deployed downward to protect the occupants when they fall sideways. When the side curtain airbags are detonated and deployed, they are inflated, and when they are not fully deployed, they rush out of their installation position and deploy outwards between the occupants and the door side to protect the occupants.

[0003] In the prior art, after the side air curtain rushes out of its installation position and deploys, the side air curtain as a whole, especially the top, expands rapidly, which will produce a large impact force on the car roof. Because the interior decoration parts on the ceiling are mostly rigid structures, the interior decoration parts of the ceiling will detach from the ceiling or the roof steel beams after being impacted, making subsequent maintenance difficult. Especially when the side air curtain is deployed in the event of a minor collision, if the interior decoration parts are detached, it will undoubtedly increase the maintenance cost of the car after the collision.

[0004] At present, no effective solution has been proposed for the problem in the prior art that the ceiling interior decoration parts are easily separated from the ceiling or the roof due to the impact of the side air curtain after the side air curtain is deployed. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a side air curtain to at least solve the problem in the prior art that after the side air curtain is deployed, the top of the side air curtain is prone to impact the ceiling interior parts, causing the ceiling interior parts to detach.

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

[0007] An embodiment of the present invention provides a side air curtain, comprising a bag and an air guide bag, wherein at least one protective cavity is provided in the bag, the air guide bag is arranged in the bag, and at least one air outlet of the air guide bag faces the air inlet of the protective cavity, and the bag further comprises:

[0008] A plurality of sewing areas, wherein the plurality of sewing areas are sewn at intervals at the top of the bag, and a plurality of reduced thickness areas are formed at the top of the bag, and a plurality of buffer zones are formed between the plurality of sewing areas and the top sutures of the bag, and a primary air guide port connected to the buffer zone is formed between the top suture of each sewing area and the top suture of the bag, and the expansion size of the primary air guide port is smaller than the expansion size of the air inlet of the protective cavity, so as to divert the gas flowing out of the air outlet of the air guide bag;

[0009] Among them, after the bladder is inflated, the multiple reduced thickness areas are arranged corresponding to one or more of the automobile ceiling interior, A-pillar ceiling, and C-pillar ceiling, and the multiple reduced thickness areas form a supporting surface on the side of the bladder facing the vehicle body to increase the contact area with the vehicle body.

[0010] Furthermore, the multiple sewing areas are divided into interior sewing areas and pillar sewing areas, the interior thickening area formed by the interior sewing area is arranged corresponding to the automobile ceiling interior decoration, and the pillar thickening area formed by the pillar sewing area is arranged corresponding to the A-pillar or C-pillar.

[0011] Furthermore, the interior sewing area includes a transverse interior sewing portion and at least one longitudinal interior sewing portion connected to the transverse interior sewing portion, at least one longitudinal interior sewing portion is located at one end of the transverse interior sewing portion close to the air guide bag, and the primary air guide port is formed between the top end of the longitudinal interior sewing portion and the top end stitch of the bag.

[0012] Further, the interior sewing area includes two longitudinal interior sewing parts, and the two longitudinal interior sewing parts are arranged at two ends of the transverse interior sewing part;

[0013] Wherein, the ends of the two longitudinal interior sewing parts away from the transverse interior sewing parts are bent into an arc structure, or the ends of the two longitudinal interior sewing parts away from the transverse interior sewing parts are both provided with a locking structure.

[0014] Furthermore, the column sewing area includes a transverse column sewing portion and at least one longitudinal column sewing portion connected to the transverse column sewing portion, at least one longitudinal column sewing portion is located at one end of the transverse column sewing portion close to the air guide bag, and the first-level air guide port is formed between the top end of the longitudinal column sewing portion and the top end stitch of the bag.

[0015] Further, the column sewing area includes two longitudinal column sewing portions arranged at both ends of the transverse column sewing portion;

[0016] Wherein, the two longitudinal column sewing parts extend upward, and the ends away from the transverse column sewing parts are bent into an arc structure or provided with a locking structure.

[0017] Further, the column sewing area includes a first longitudinal column sewing portion and a second longitudinal column sewing portion disposed at both ends of the transverse column sewing portion;

[0018] Among them, the first longitudinal column sewing part extends upward, and the end away from the transverse column sewing part is bent into an arc structure or provided with a lock structure; the second longitudinal column sewing part extends upward at an angle and is connected to the top stitching line or the longitudinal stitching line of the pouch.

[0019] Furthermore, when the column thickening area formed in the column sewing area corresponds to the A-pillar, the first longitudinal column sewing portion extends upward and then continues to extend in the direction of the second longitudinal column sewing portion until it approaches the second longitudinal column sewing portion, and a secondary air guide port is formed between the end of the first longitudinal column sewing portion and the second longitudinal column sewing portion, and a secondary buffer cavity is formed between the first longitudinal column sewing portion, the second longitudinal column sewing portion and the transverse column sewing portion.

[0020] Further, when the column thickness reduction area formed in the column sewing area corresponds to the C-pillar, the column sewing area includes a first longitudinal column sewing portion and a second longitudinal column sewing portion provided at both ends of the transverse column sewing portion;

[0021] Among them, the first longitudinal column sewing portion extends upward at an angle to approach the top stitching line of the pouch, and then extends downward at an angle to connect with the longitudinal stitching line of the pouch, a secondary air guide port is formed between the first longitudinal column sewing portion and the top stitching line of the pouch, and a secondary buffer cavity is formed between the first longitudinal column sewing portion and the longitudinal pouch stitching line of the pouch, the second longitudinal column sewing portion extends upward, and the end away from the transverse column sewing portion is bent into an arc structure or provided with a locking structure.

[0022] Further, the rear side seam at the bottom end of the pouch protrudes and extends downward to form a protrusion after the pouch expands;

[0023] When an occupant in the car lies down and the bag is inflated and unfolded, the occupant's head corresponds to the protruding portion to protect the occupant's head in a collision event.

[0024] 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:

[0025] The side air curtain of the present invention provides a plurality of sewing areas at the top of the bag, so that when the bag is inflated, a plurality of reduced thickness areas are formed at the top of the bag to avoid the car ceiling interior decoration, thereby solving the problem in the prior art that after the side air curtain is deployed, the top of the side air curtain is easy to impact the ceiling interior decoration, causing the ceiling interior decoration to be separated;

[0026] Furthermore, after the reduced thickness area is formed in the plurality of sewing areas, the reduced thickness area increases the portion in contact with the vehicle body relative to the top of the existing bladder bag, so that the top of the bladder bag is supported by the vehicle body to form better rigidity, providing stronger support and protection for the members;

[0027] Furthermore, by directing the air outlet of the air guide bag toward the air inlet of the protection cavity and setting the expansion size of the first-level air guide port to be smaller than the expansion size of the air inlet of the protection cavity, the protection cavity is first filled and expanded to form a support, and then the gas flows into the cavity formed by the sewing area to move the side air curtain into the vehicle, thereby preventing the side air curtain from floating outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 any creative work.

[0029] Figure 1 A schematic diagram of the installation of a side air curtain according to an embodiment of the present invention;

[0030] Figure 2 1 is a schematic structural diagram of a side air curtain according to an embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the structure of a side air curtain according to an embodiment of the present invention (II);

[0032] Figure 4 This is a schematic structural diagram of a side air curtain according to an embodiment of the present invention (III).

[0033] The accompanying drawings of the present invention are as follows:

[0034] 10. Bladder; 11. Protective cavity; 111. Air inlet; 112. Front gas passes through protective cavity; 113. Front protective cavity; 114. Non-inflatable part; 115. Middle buffer part; 116. Transverse cavity; 117. Rear protective cavity; 118. Rear buffer cavity; 12. Sewing area; 121. Interior sewing area; 1211. Transverse interior sewing part; 1212. Longitudinal interior sewing part; 122. Column sewing area; 1221. Transverse column sewing part; 1222. Longitudinal column sewing part; 1223. First longitudinal column sewing part; 1224. Second longitudinal column sewing part; 13. Buffer zone; 14. Primary air guide port; 15. Secondary air guide port; 16. Secondary buffer cavity; 17. Protrusion;

[0035] 20. Air guide bag; 21. Air outlet. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] During the detonation process of the side curtain airbag subsystem, there are often subsystem problems such as handle disengagement, A-pillar breakage, airbag scratching the sealing strip, and the airbag deployment posture drifting outside the car. Therefore, the existing side curtain airbag design cannot well balance the subsystem problems and the increasingly stringent performance requirements.

[0042] Based on this, this specification embodiment proposes a processing solution: Figure 1As shown, a side air curtain of the present application directly faces the air outlet 21 of the air guide bag 20 to the air inlet 111 of the protection cavity 11, and forms a plurality of reduced thickness areas at the top of the bag 10, thereby avoiding damage to the ceiling interior when the bag 10 is deployed and improving the support capacity with the vehicle body;

[0043] Furthermore, by adjusting the expansion size of the primary air guide port 14 and the expansion size of the air inlet 111, the gas can first flow to the protective cavity 11, and then flow to the cavity formed between the sewing area 12 and the top stitching of the bag 10, so as to prevent the side air curtain from floating outward.

[0044] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0045] like Figures 1 to 4 As shown, a side air curtain of the present invention includes a bag 10 and an air guide bag 20. At least one protective cavity 11 is provided in the bag 10. The air guide bag 20 is arranged in the bag 10, and at least one air outlet 21 of the air guide bag 20 faces the air inlet 111 of the protective cavity 11.

[0046] The air guide bag 20 is used to guide the gas entering the bag 10 ; the protection cavity 11 is used to protect the occupants in the vehicle.

[0047] The air outlet 21 of the air guide bag 20 faces the air inlet 111 of the protection cavity 11, so that the protection cavity 11 can be quickly filled first to form support and protect the occupants in the vehicle.

[0048] The bag 10 also includes a plurality of sewing areas 12, which are sewn at intervals at the top of the bag 10, and limit the inflation thickness of the top of the bag 10 to form a plurality of reduced thickness areas, a plurality of buffer zones 13 are formed between the plurality of sewing areas 12 and the top of the bag 10, a primary air guide port 14 is formed between the top stitch of each sewing area 12 and the top stitch of the bag 10, and the expansion size of the primary air guide port 14 is smaller than the expansion size of the air inlet 111 of the protective cavity 11, so as to divert the gas flowing out of the air outlet 21 of the air guide bag 20; wherein, after the bag 10 is inflated, the plurality of reduced thickness areas are arranged corresponding to one or more of the car roof interior, the A-pillar ceiling, and the C-pillar ceiling, and the plurality of reduced thickness areas form a support surface on the side of the bag 10 facing the vehicle body, so as to increase the contact area with the vehicle body.

[0049] Among them, the top end of the bag 10 is the top end of the bag 10 after it is installed on the vehicle and unfolded; the bottom end of the bag 10 is the bottom end of the bag 10 after it is installed on the vehicle and unfolded; the front end and the rear end of the bag 10 are the parts located at the front end and the rear end of the vehicle after the bag 10 is installed on the vehicle.

[0050] The sizes of the multiple sewing areas 12 are flexibly set according to the size of the ceiling interior decoration parts; the reduced thickness area is the area around the sewing area 12.

[0051] Among them, after the bag 10 is inflated, the portion of the top of the bag 10 where the sewing area 12 is set is limited in expansion thickness by the sewing area 12, thereby forming a reduced thickness area around the sewing area 12 to prevent the bag 10 from directly impacting the ceiling interior or the A-pillar, C-pillar, causing the ceiling interior to fall off or the A-pillar, C-pillar to rupture.

[0052] Among them, after the thickness of the area around the sewing area 12 on the bag 10 is limited, the contact area between the bag 10 around the sewing area 12 and the vehicle body is increased, so that the vehicle body can provide better support for the airbag and the stability of the side air curtain is improved.

[0053] Among them, after the buffer zone 13 is formed at the top of the bag 10, the air intake of the buffer zone 13 can be limited through the first-level air guide port 14, so that the gas can flow into the protection cavity 11 in large quantities first, so that the protection cavity 11 can be deployed first, and the buffer zone 13 can be deployed later, so as to prevent the side air curtain from floating outward.

[0054] Specifically, when the gas enters the bag 10 through the air guide bag 20, after the gas enters the bag 10 through the air outlet 21 of the air guide bag 20, since the size of the first-level air guide port 14 is smaller than the size of the air inlet 111 of the protection cavity 11, the gas first enters the protection cavity 11 so that the protection cavity 11 is first unfolded to form a support, and finally the gas enters the buffer zone 13 to expand the buffer zone 13 and swing the protection cavity 11 toward the inside of the vehicle to prevent the side air curtain from floating outward.

[0055] The present application sets a plurality of sewing areas 12 at the top of the bladder 10, thereby forming a reduced thickness area at the top of the bladder 10 after the bladder 10 is inflated, so as to reduce the force of impact on the automobile ceiling interior, A-pillar ceiling and C-pillar ceiling, and avoid damage to the automobile ceiling interior, A-pillar ceiling and C-pillar ceiling.

[0056] Furthermore, the plurality of sewing areas 12 are divided into an interior sewing area 121 and a pillar sewing area 122. The interior thickening area formed by the interior sewing area 121 is arranged corresponding to the interior decoration of the automobile ceiling, and the pillar thickening area formed by the pillar sewing area 122 is arranged corresponding to the A-pillar or the C-pillar.

[0057] Among them, the car ceiling interior parts include reading lights, handles and other interior parts.

[0058] The shape or size of the sewing area 12 can be flexibly set according to the distance between the reading light, the handle, the A-pillar or the C-pillar and the side air curtain.

[0059] For example, the size of the sewing area 12 at the reading light may be smaller than the size of the sewing area 12 at the handle.

[0060] Furthermore, the interior sewing area 121 includes a transverse interior sewing portion 1211 and at least one longitudinal interior sewing portion 1212 connected to the transverse interior sewing portion 1211. The at least one longitudinal interior sewing portion 1212 is located at one end of the transverse interior sewing portion 1211 close to the air bag 20. A primary air outlet 14 is formed between the top end of the longitudinal interior sewing portion 1212 and the top end stitch of the bag 10.

[0061] Among them, arranging the longitudinal interior sewing portion 1212 at one end close to the air guide bag 20 can make the gas flow to the protection cavity 11 first, so as to avoid the buffer zone 13 being filled first.

[0062] Preferably, the interior sewing area 121 includes two longitudinal interior sewing portions 1212, and the two longitudinal interior sewing portions 1212 are arranged at both ends of the transverse interior sewing portion 1211; wherein, the ends of the two longitudinal interior sewing portions 1212 away from the transverse interior sewing portion 1211 are bent into an arc structure, or the ends of the two longitudinal interior sewing portions 1212 away from the transverse interior sewing portion 1211 are provided with a locking structure.

[0063] Among them, after the two longitudinal interior sewing parts 1212 are set at the two ends of the transverse interior sewing part 1211, the interior sewing area 121 is overall U-shaped structure to prevent the airflow from flowing back from the protection cavity 11 to the buffer zone 13, so that the buffer zone 13 is inflated in advance.

[0064] Among them, the end of the longitudinal interior sewing part 1212 away from the transverse interior sewing part 1211 is set as a lock structure or an arc structure, which can prevent the end of the longitudinal interior sewing part 1212 away from the transverse interior sewing part 1211 from being torn by gas.

[0065] Furthermore, if Figure 2 As shown, the column sewing area 122 includes a transverse column sewing portion 1221 and at least one longitudinal column sewing portion 1222 connected to the transverse column sewing portion 1221. The at least one longitudinal column sewing portion 1222 is located at one end of the transverse column sewing portion 1221 close to the air guide bag 20. A primary air guide port 14 is formed between the top end of the longitudinal column sewing portion 1222 and the top end stitch of the bag 10.

[0066] Among them, disposing the longitudinal column sewing portion 1222 at one end close to the air guide bag 20 can make the gas flow to the protection cavity 11 first, so as to avoid the buffer zone 13 being filled first.

[0067] Preferably, the column sewing area 122 includes two longitudinal column sewing portions 1222 arranged at both ends of the transverse column sewing portion 1221; wherein the two longitudinal column sewing portions 1222 extend upward, and the ends away from the transverse column sewing portion 1221 are bent into an arc structure or provided with a locking structure.

[0068] Among them, after two longitudinal column sewing parts 1222 are set at both ends of the transverse column sewing part 1221, the column sewing area 122 is an overall U-shaped structure to prevent the gas in the protection cavity 11 from quickly flowing back to the buffer zone 13, so that the buffer zone 13 is quickly filled.

[0069] In some of the embodiments, Figures 3-4 As shown, the column sewing area 122 includes a first longitudinal column sewing portion 1223 and a second longitudinal column sewing portion 1224 which are arranged at both ends of the transverse column sewing portion 1221; wherein, the first longitudinal column sewing portion 1223 extends upward, and is bent into an arc structure or provided with a lock structure at the end away from the transverse column sewing portion 1221; the second longitudinal column sewing portion 1224 extends upward at an angle and is connected to the top stitching or longitudinal stitching of the pouch 10.

[0070] Among them, by extending the second longitudinal column sewing portion 1224 upwardly tilted to connect with the top stitching or longitudinal stitching of the bag 10, the air inlet 111 of the buffer zone 13 corresponding to the column sewing portion is reduced, so as to further reduce the inflation efficiency of the buffer zone 13 corresponding to the column sewing portion, thereby preventing the buffer zone 13 corresponding to the column sewing portion from causing damage to the A-pillar ceiling or the C-pillar ceiling.

[0071] Preferably, the second longitudinal column sewing portion 1224 is connected to an end of the top suture of the pouch 10 close to the longitudinal suture or an end of the longitudinal suture close to the top suture of the pouch 10 .

[0072] Furthermore, if Figure 4 As shown, when the column thickening area formed in the column sewing area 122 corresponds to the A-pillar, the first longitudinal column sewing portion 1223 extends upward and then continues to extend in the direction of the second longitudinal column sewing portion 1224 until it approaches the second longitudinal column sewing portion 1224, and a secondary air guide port 15 is formed between the end of the first longitudinal column sewing portion 1223 and the second longitudinal column sewing portion 1224, and a secondary buffer cavity 16 is formed between the first longitudinal column sewing portion 1223, the second longitudinal column sewing portion 1224 and the transverse column sewing portion 1221.

[0073] Among them, by continuing to extend the first longitudinal column sewing portion 1223 in the direction of the second longitudinal column sewing portion 1224, the buffer zone 13 corresponding to the column sewing area 122 can continue to be thickened, so as to avoid the A-pillar ceiling being damaged due to the excessive thickness of the buffer zone 13 corresponding to the column sewing area 122; in addition, after continuing to extend the first longitudinal column sewing portion 1223 toward the second longitudinal column sewing portion 1224, the inflation rate in the secondary buffer cavity 16 is further reduced, thereby further reducing the expansion rate of the buffer zone 13 corresponding to the column sewing area 122.

[0074] The portion of the first longitudinal column sewing portion 1223 extending laterally toward the second longitudinal column sewing portion 1224 may be configured as a curved structure to increase the area of ​​the reduced thickness region, such as an inverted V shape.

[0075] In some of the embodiments, when the column thickening area formed in the column sewing area 122 corresponds to the C-pillar, the column sewing area 122 includes a first longitudinal column sewing portion 1223 and a second longitudinal column sewing portion 1224 arranged at both ends of the transverse column sewing portion 1221; wherein, the first longitudinal column sewing portion 1223 extends upward at an angle to the top stitching line close to the sac bag 10, and then extends downward at an angle to connect with the longitudinal stitching line of the sac bag 10, a secondary air guide port 15 is formed between the first longitudinal column sewing portion 1223 and the top stitching line of the sac bag 10, and a secondary buffer cavity 16 is formed between the first longitudinal column sewing portion 1223 and the longitudinal sac bag 10 stitching line of the sac bag 10, and the second longitudinal column sewing portion 1224 extends upward, and is bent into an arc structure or is provided with a lock structure at the end away from the transverse column sewing portion 1221.

[0076] The secondary buffer cavity 16 is used to provide a buffering effect and reduce the inflation efficiency of the buffer zone 13 corresponding to the pillar sewing area 122 to avoid damage to the C-pillar during the deployment of the side air curtain.

[0077] The secondary buffer chamber 16 is also used to receive the return gas of the rear protection chamber 117 when the rear protection chamber 117 is collided, so as to reduce the damage to the occupants.

[0078] like Figure 1 As shown, the rear seam at the bottom end of the bag 10 protrudes downward to form a protrusion 17 after the bag 10 is inflated; wherein, after the occupant in the car lies down and the bag 10 is inflated and expanded, the occupant's head corresponds to the protrusion 17 to protect the occupant's head in a collision event.

[0079] In some of the embodiments, Figure 3 As shown, the front end of the bag 10 also includes a front gas passage protection cavity 112 transversely arranged in the middle of the bag 10 and a plurality of front protection cavities 113 located below the front gas passage protection cavity 112. The front gas passage protection cavity 112 is connected to the gas outlet 21 of the air guide bag 20. The front protection cavity 113 is a vertical cavity and is sequentially arranged along the width direction of the bag 10, and the plurality of front protection cavities 113 are respectively connected to the front gas passage protection cavity 112.

[0080] For example, a plurality of vertical stitches may be provided on the pouch 10 to form a plurality of front protection cavities 113 .

[0081] Among them, by setting the front protection cavity 113 as multiple vertical cavities and a horizontal front air-through protection cavity 112, the front protection cavity 113 can be quickly filled and expanded while providing good protection for the occupants, and the front protection cavity 113 can also form good support between the side air curtain and the car door panel.

[0082] Furthermore, the bladder 10 also includes a non-inflatable portion 114, which is arranged in the middle of the bladder 10 to correspond to the B-pillar, and the bottom end of the non-inflatable portion 114 is spaced from the bottom end stitch of the bladder 10 to form a middle protective cavity 11 at the bottom end of the non-inflatable portion 114.

[0083] Furthermore, a buffer suture is provided on one side of the non-inflatable portion 114 close to the front end of the sac bag 10. The buffer suture is C-shaped, and one end of the buffer suture is connected to the suture of the non-inflatable portion 114, and the other end is spaced apart from the non-inflatable portion 114 and located above the suture at the bottom end of the sac bag 10 to form a middle buffer portion 115.

[0084] A transverse cavity 116 is formed below the non-inflatable portion 114 and the middle buffer portion 115 to facilitate the passage of gas or to form a transverse protective cavity 11 .

[0085] Furthermore, a rear protection cavity 117 is provided on one side of the non-inflatable portion 114 close to the rear end of the bag 10. The rear protection cavity 117 is a longitudinal cavity and is arranged corresponding to another air outlet 21 of the air guide bag 20 for protecting rear passengers, such as passengers in child seats.

[0086] For example, the rear protection cavity 117 is approximately located at the Q3 position of the side air curtain and is used to protect the occupant in the child seat.

[0087] A rear buffer chamber 118 is provided on a side of the rear protection chamber 117 away from the non-inflatable portion 114 , for providing a buffer for the rear protection chamber 117 .

[0088] Specifically, the rear buffer cavity 118 is formed by a rear buffer suture, the rear buffer suture is in an inverted U-shape, and an airway communicating with the rear protective cavity 117 is formed at one end thereof close to the rear protective cavity 117 .

[0089] Specifically, the transverse cavity 116 formed below the non-inflatable portion 114 and the middle buffer portion 115 of the present application connects the front protective cavity 113 and the rear protective cavity 117 respectively, so that the gases in the front protective cavity 113 and the rear protective cavity 117 of the bag 10 flow to each other so that the front protective cavity 113 and the rear protective cavity 117 can be quickly expanded.

[0090] A side air curtain of the present invention, by providing a pocket-shaped pattern at the top of the bag 10 and situating it near the gas generator, can divert the gas generated by the gas generator, ensure that the main cavity of the airbag is quickly filled, and quickly provide support for the occupant; it can also reduce the impact of the airbag on the surrounding environment, ensure that the inflation area at the upper end of the airbag has a sufficient overlap with the vehicle body, and the airbag is supported by the vehicle body to form better rigidity, providing stronger support and protection for the occupant; the present application can also control the size of the air inlet 111 of the pocket pattern to ensure that the internal pressure of the airbag cavity is stabilized when the occupant is in contact and squeezed with the airbag.

[0091] 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.

[0092] 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 side air curtain, comprising a bag and an air guide bag, wherein at least one protective cavity is provided in the bag, the air guide bag is arranged in the bag, and at least one air outlet of the air guide bag faces the air inlet of the protective cavity, characterized in that: The pouch further comprises: A plurality of sewing areas, wherein the plurality of sewing areas are sewn at intervals at the top of the bag, and a plurality of reduced thickness areas are formed at the top of the bag, and a plurality of buffer zones are formed between the plurality of sewing areas and the top sutures of the bag, and a primary air guide port connected to the buffer zone is formed between the top suture of each sewing area and the top suture of the bag, and the expansion size of the primary air guide port is smaller than the expansion size of the air inlet of the protective cavity, so as to divert the gas flowing out of the air outlet of the air guide bag; Among them, after the bladder is inflated, the multiple reduced thickness areas are arranged corresponding to one or more of the automobile ceiling interior, A-pillar ceiling, and C-pillar ceiling, and the multiple reduced thickness areas form a supporting surface on the side of the bladder facing the vehicle body to increase the contact area with the vehicle body.

2. The side curtain airbag according to claim 1, characterized in that: The multiple sewing areas are divided into interior sewing areas and pillar sewing areas. The interior thickening area formed by the interior sewing area is arranged corresponding to the automobile ceiling interior decoration part, and the pillar thickening area formed by the pillar sewing area is arranged corresponding to the A-pillar or C-pillar.

3. The side curtain airbag according to claim 2, characterized in that: The interior sewing area includes a transverse interior sewing portion and at least one longitudinal interior sewing portion connected to the transverse interior sewing portion, at least one longitudinal interior sewing portion is located at one end of the transverse interior sewing portion close to the air guide bag, and the primary air guide port is formed between the top end of the longitudinal interior sewing portion and the top end stitch of the bag.

4. The side curtain airbag according to claim 3, characterized in that: The interior sewing area includes two longitudinal interior sewing parts, and the two longitudinal interior sewing parts are arranged at two ends of the transverse interior sewing part; Wherein, the ends of the two longitudinal interior sewing parts away from the transverse interior sewing parts are bent into an arc structure, or the ends of the two longitudinal interior sewing parts away from the transverse interior sewing parts are both provided with a locking structure.

5. The side curtain airbag according to any one of claims 2 to 4, characterized in that: The column sewing area includes a transverse column sewing portion and at least one longitudinal column sewing portion connected to the transverse column sewing portion, at least one longitudinal column sewing portion is located at one end of the transverse column sewing portion close to the air guide bag, and the first-level air guide port is formed between the top end of the longitudinal column sewing portion and the top end stitch of the bag.

6. The side curtain airbag according to claim 5, characterized in that: The column sewing area includes two longitudinal column sewing parts arranged at both ends of the transverse column sewing part; Wherein, the two longitudinal column sewing parts extend upward, and the ends away from the transverse column sewing parts are bent into an arc structure or provided with a locking structure.

7. The side curtain airbag according to claim 5, characterized in that: The column sewing area includes a first longitudinal column sewing portion and a second longitudinal column sewing portion disposed at both ends of the transverse column sewing portion; Among them, the first longitudinal column sewing part extends upward, and the end away from the transverse column sewing part is bent into an arc structure or provided with a lock structure; the second longitudinal column sewing part extends upward at an angle and is connected to the top stitching line or the longitudinal stitching line of the pouch.

8. The side curtain airbag according to claim 7, characterized in that: When the column thickening area formed in the column sewing area corresponds to the A-pillar, the first longitudinal column sewing portion extends upward and then continues to extend in the direction of the second longitudinal column sewing portion until it approaches the second longitudinal column sewing portion, and a secondary air guide port is formed between the end of the first longitudinal column sewing portion and the second longitudinal column sewing portion, and a secondary buffer cavity is formed between the first longitudinal column sewing portion, the second longitudinal column sewing portion and the transverse column sewing portion.

9. The side curtain airbag according to claim 5, characterized in that: When the column thickness reduction area formed in the column sewing area corresponds to the C-pillar, the column sewing area includes a first longitudinal column sewing portion and a second longitudinal column sewing portion provided at both ends of the transverse column sewing portion; Among them, the first longitudinal column sewing portion extends upward at an angle to approach the top stitching line of the pouch, and then extends downward at an angle to connect with the longitudinal stitching line of the pouch, a secondary air guide port is formed between the first longitudinal column sewing portion and the top stitching line of the pouch, and a secondary buffer cavity is formed between the first longitudinal column sewing portion and the longitudinal pouch stitching line of the pouch, the second longitudinal column sewing portion extends upward, and the end away from the transverse column sewing portion is bent into an arc structure or provided with a locking structure.

10. The side curtain airbag according to claim 1, characterized in that: The rear side stitching of the bottom end of the pouch protrudes and extends downward to form a protrusion after the pouch is expanded; When an occupant in the car lies down and the bag is inflated and unfolded, the occupant's head corresponds to the protruding portion to protect the occupant's head in a collision event.

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