A side curtain airbag

Abstract

The application discloses a side air curtain, which comprises a bag and a guide air bag, at least one protection cavity is arranged in the bag, the guide air bag is arranged in the bag, at least one air outlet of the guide air bag faces an air inlet of the protection cavity, the bag further comprises a plurality of sewing areas, the plurality of sewing areas are spaced and sewn at the top end of the bag, a plurality of thickness-reducing areas are formed at the top end of the bag, a plurality of buffer areas are formed between the plurality of sewing areas and sewing lines at the top end of the bag, a primary guide air inlet of each of the buffer areas is formed between the top end sewing line of each of the sewing areas and the top end sewing line of the bag, the inflation size of the primary guide air inlet is smaller than that of the air inlet of the protection cavity, and the gas flowing out of the air outlet of the guide air bag is shunted.

Description

Technical Field

[0001] This invention relates to the field of airbag technology, and more specifically to a side curtain airbag. Background Technology

[0002] Side curtain airbags are typically installed between the A-pillars and C-pillars of a car, located between the roof and crossbeams. In the event of a collision, they deploy downwards to protect occupants if they are thrown sideways. When the side curtain airbag is deployed, it inflates and, before fully deploying, moves out of its installation position and extends outwards between the occupant and the side of the door to protect them.

[0003] In existing technology, after the side curtain airbags are deployed and move out of their installation position, the entire side curtain airbag, especially the top, expands rapidly, which can generate a large impact force on the car roof. Since most of the interior trim parts on the roof are rigid structures, they can detach from the roof or roof beams after being impacted, making subsequent repairs difficult. This is especially true in minor collisions where the side curtain airbags deploy; if the interior trim parts detach, it undoubtedly increases the maintenance costs after a car collision.

[0004] Currently, no effective solution has been proposed for the problem that headliner interior parts are easily detached from the headliner or roof due to the impact of the side curtain airbags after they are deployed. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a side curtain airbag to at least solve the problem in the prior art where the top of the side curtain airbag easily impacts the headliner trim after deployment, causing the headliner trim to detach.

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

[0007] This invention provides a side curtain airbag, comprising a pouch and an air guide bag. The pouch has at least one protective cavity, and the air guide bag is disposed within the pouch, with at least one air outlet of the air guide bag facing the air inlet of the protective cavity. The pouch further includes:

[0008] Multiple sewing zones are sewn at intervals at the top of the pouch, forming multiple thickening areas at the top of the pouch. Multiple buffer zones are formed between the multiple sewing zones and the top seam of the pouch. A primary air duct is formed between the top seam of each sewing zone and the top seam of the pouch, connecting the buffer zone. The expansion size of the primary air duct 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 duct bag.

[0009] After the bag is inflated, the plurality of thickened areas are correspondingly arranged with one or more of the car headliner, A-pillar headliner, and C-pillar headliner, and the plurality of thickened areas form a support surface on the side of the bag facing the car body to increase the contact area with the car 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 corresponds to the interior trim of the car headliner, and the pillar thickening area formed by the pillar sewing area corresponds to the A-pillar or C-pillar.

[0011] Furthermore, the interior sewing area includes a transverse interior sewing section and at least one longitudinal interior sewing section connected to the transverse interior sewing section. The at least one longitudinal interior sewing section is located at one end of the transverse interior sewing section near the air duct. The first-stage air duct is formed between the top of the longitudinal interior sewing section and the top seam of the bladder.

[0012] Furthermore, the interior sewing area includes two longitudinal interior sewing sections, which are disposed at both ends of the transverse interior sewing section;

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

[0014] Furthermore, the column sewing area includes a transverse column sewing section and at least one longitudinal column sewing section connected to the transverse column sewing section. The at least one longitudinal column sewing section is located at one end of the transverse column sewing section near the air guide bag, and the top of the longitudinal column sewing section forms the primary air guide port between the top seam of the bag and the top seam of the bag.

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

[0016] The two longitudinal column sewing portions extend upwards, and the ends away from the transverse column sewing portions are bent into an arc shape or have a locking structure.

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

[0018] The first longitudinal column sewing part extends upward and its end away from the transverse column sewing part is bent into an arc shape or has a locking structure; the second longitudinal column sewing part extends upward at an angle and is connected to the top seam or longitudinal seam of the pouch.

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

[0020] Furthermore, when the column thickening area formed in the column sewing area corresponds to the C-column, the column sewing area includes a first longitudinal column sewing part and a second longitudinal column sewing part disposed at both ends of the transverse column sewing part;

[0021] The first longitudinal column sewing part extends upward at an angle to near the top seam of the pouch, and then extends downward at an angle to connect with the longitudinal seam of the pouch. A secondary air vent is formed between the first longitudinal column sewing part and the top seam of the pouch, and a secondary buffer cavity is formed between the first longitudinal column sewing part and the longitudinal pouch seam of the pouch. The second longitudinal column sewing part extends upward, and the end away from the transverse column sewing part is bent into an arc shape or has a locking structure.

[0022] Furthermore, the bottom rear seam of the bag extends downward to form a protrusion after the bag expands;

[0023] When the occupant lies down inside the vehicle and the bag inflates and deploys, the occupant's head aligns with the protrusion to protect the occupant's head during a collision.

[0024] Compared with the prior art, the beneficial effects that the at least one technical solution adopted in the embodiments of the present invention can achieve include at least:

[0025] The present invention provides a side curtain airbag, which, by setting multiple sewing areas at the top of the airbag, forms multiple thickened areas at the top of the airbag when the airbag is inflated, thereby avoiding impact on the car headliner interior parts. This solves the problem in the prior art where the top of the side curtain airbag easily impacts the headliner interior parts after the side curtain airbag is deployed, causing the headliner interior parts to detach.

[0026] Furthermore, after forming a thickened area in multiple sewing zones, the thickened area has an increased contact portion with the vehicle body compared to the existing top of the bag, thereby making the top of the bag more rigid with the vehicle body as support, providing stronger support and protection for the occupants.

[0027] Furthermore, by aligning the air outlet of the air guide bag with the air inlet of the protective cavity, and setting the expansion size of the primary air guide port to be smaller than the expansion size of the air inlet of the protective cavity, the protective cavity is filled and expanded first to form support, and then the gas flows into the cavity formed by the sewing area to bounce the side curtain airbag into the vehicle, preventing the side curtain airbag from drifting outward. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0030] Figure 2 This is a schematic diagram of the structure of a side air curtain according to an embodiment of the present invention (I);

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

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

[0033] The reference numerals in the drawings of this invention are as follows:

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

[0035] 20. Air duct bag; 21. Air outlet. Detailed Implementation

[0036] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0037] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one 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 aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0041] During the deployment process of the side curtain airbag subsystem, issues such as handle detachment, A-pillar breakage, and airbag scraping against the sealing strip frequently occur, along with the airbag drifting outwards during deployment. Therefore, existing side curtain airbag designs cannot adequately balance these subsystem issues with increasingly stringent performance requirements.

[0042] Based on this, the embodiments of this specification propose a processing solution: such as Figure 1As shown, a side curtain airbag of this application directly faces the air outlet 21 of the air guide bag 20 toward the air inlet 111 of the protective cavity 11, and forms multiple thickened areas at the top of the bag 10, thereby avoiding damage to the headliner interior parts 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 inlet 14 and the air inlet 111, the gas can first flow into the protective cavity 11, and then flow into the cavity formed between the sewing area 12 and the top seam of the pouch 10, so as to prevent the side air curtain from drifting outward.

[0044] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0045] like Figures 1-4 As shown, a side curtain airbag of the present invention includes a bag 10 and an air guide bag 20. The bag 10 has at least one protective cavity 11. The air guide bag 20 is disposed 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 protective cavity 11 is used to protect the occupants inside the vehicle.

[0047] The air outlet 21 of the air guide bag 20 faces the air inlet 111 of the protective cavity 11, which enables the protective cavity 11 to be quickly filled first to form support and protect the occupants inside the vehicle.

[0048] The pouch 10 also includes multiple sewing areas 12, which are sewn at intervals to the top of the pouch 10, limiting the inflation thickness of the top of the pouch 10 to form multiple thinning areas. Multiple buffer zones 13 are formed between the multiple sewing areas 12 and the top of the pouch 10. A primary air duct 14 is formed between the top seam of each sewing area 12 and the top seam of the pouch 10. The expansion size of the primary air duct 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 bag 20. After the pouch 10 is inflated, the multiple thinning areas are correspondingly set with one or more of the car headliner, A-pillar headliner, and C-pillar headliner. The multiple thinning areas form a support surface on the side of the pouch 10 facing the car body to increase the contact area with the car body.

[0049] The top of the pouch 10 is the top of the pouch 10 after it is installed on the vehicle and unfolded; the bottom of the pouch 10 is the bottom of the pouch 10 after it is installed on the vehicle and unfolded; the front and rear ends of the pouch 10 are the parts of the pouch 10 located at the front and rear ends of the vehicle after it is installed on the vehicle.

[0050] The dimensions of the multiple sewing areas 12 are flexibly set according to the dimensions of the headliner interior parts; the thickened area is the area around the sewing area 12.

[0051] When the pouch 10 is inflated, the portion of the pouch 10 with a sewing area 12 at the top is restricted in its expansion thickness by the sewing area 12, thereby forming a reduced thickness area around the sewing area 12 to prevent the pouch 10 from directly impacting the headliner trim or the A-pillar and C-pillar, which could cause the headliner trim to fall off or the A-pillar and C-pillar to crack.

[0052] By limiting the thickness of the area around the sewing area 12 on the airbag 10, the contact area between the airbag 10 and the vehicle body around the sewing area 12 is increased, which allows the vehicle body to provide better support for the airbag and also improves the stability of the side curtain airbag.

[0053] In this design, after a 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 primary air inlet 14, so that a large amount of gas flows into the protective cavity 11 first, causing the protective cavity 11 to unfold first, and the buffer zone 13 to unfold later, in order to prevent the side air curtain from drifting 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-stage air guide port 14 is smaller than the size of the air inlet 111 of the protective cavity 11, the gas enters the protective cavity 11 first, causing the protective cavity 11 to unfold first and form support. Finally, the gas enters the buffer zone 13, causing the buffer zone 13 to expand and swing the protective cavity 11 towards the inside of the vehicle, preventing the side curtain airbag from drifting outward.

[0055] This application provides multiple sewing areas 12 at the top of the pouch 10, thereby forming a thickened area at the top of the pouch 10 after it is inflated, which reduces the impact force on the car headliner, A-pillar headliner and C-pillar headliner and prevents damage to the car headliner, A-pillar headliner and C-pillar headliner.

[0056] Furthermore, the multiple sewing areas 12 are divided into interior sewing area 121 and pillar sewing area 122. The interior thickening area formed by the interior sewing area 121 corresponds to the interior trim of the car headliner, and the pillar thickening area formed by the pillar sewing area 122 corresponds to the A-pillar or C-pillar.

[0057] Among them, automotive headliner interior components include reading lights, door 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, handle, A-pillar or C-pillar and the side curtain airbag.

[0059] For example, the size of the sewing area 12 at the reading light can 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 section 1211 and at least one longitudinal interior sewing section 1212 connected to the transverse interior sewing section 1211. The at least one longitudinal interior sewing section 1212 is located at one end of the transverse interior sewing section 1211 near the air duct 20. A primary air duct 14 is formed between the top end of the longitudinal interior sewing section 1212 and the top seam of the duct 10.

[0061] The longitudinal interior sewing part 1212 is positioned at the end near the air duct 20 so that the gas is first flowed into the protective cavity 11, thus preventing the buffer zone 13 from being filled first.

[0062] Preferably, the interior sewing area 121 includes two longitudinal interior sewing portions 1212, which are disposed 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-shaped structure, or a locking structure is provided at one end of the two longitudinal interior sewing portions 1212 away from the transverse interior sewing portion 1211.

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

[0064] The longitudinal interior sewing part 1212 is provided with a locking structure or an arc-shaped structure at the end away from the transverse interior sewing part 1211, 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, such as Figure 2 As shown, the column sewing area 122 includes a transverse column sewing section 1221 and at least one longitudinal column sewing section 1222 connected to the transverse column sewing section 1221. The at least one longitudinal column sewing section 1222 is located at one end of the transverse column sewing section 1221 near the air duct 20. The top end of the longitudinal column sewing section 1222 forms a primary air duct 14 between the top seam of the bladder 10 and the top seam of the bladder 10.

[0066] The longitudinal column sewing part 1222 is positioned at one end near the air guide bag 20 so that the gas is first flowed into the protective cavity 11, thus preventing the buffer zone 13 from being filled first.

[0067] Preferably, the column sewing area 122 includes two longitudinal column sewing portions 1222 disposed 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-shaped 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 has a U-shaped structure as a whole, so as to prevent the gas in the protective cavity 11 from flowing back to the buffer zone 13 quickly, so that the buffer zone 13 is quickly filled.

[0069] In some of these embodiments, such as Figures 3-4 As shown, the column sewing area 122 includes a first longitudinal column sewing part 1223 and a second longitudinal column sewing part 1224 disposed at both ends of the transverse column sewing part 1221; wherein, the first longitudinal column sewing part 1223 extends upward and the end away from the transverse column sewing part 1221 is bent into an arc-shaped structure or provided with a locking structure; the second longitudinal column sewing part 1224 extends upward at an angle and is connected to the top seam or longitudinal seam of the pouch 10.

[0070] Specifically, by extending the second longitudinal column sewing part 1224 upwardly to connect with the top seam or longitudinal seam of the pouch 10, the air inlet 111 of the buffer zone 13 corresponding to the column sewing part is reduced, thereby further reducing the inflation efficiency of the buffer zone 13 corresponding to the column sewing part and avoiding damage to the A-column roof or C-column roof caused by the buffer zone 13 corresponding to the column sewing part.

[0071] Preferably, the second longitudinal column sewing part 1224 is connected to the end of the top seam of the pouch 10 near the longitudinal seam or the end of the longitudinal seam near the top seam of the pouch 10.

[0072] Furthermore, such as Figure 4 As shown, when the column thickness reduction area formed in the column sewing area 122 corresponds to column A, the first longitudinal column sewing part 1223 extends upward and continues to extend in the direction of the second longitudinal column sewing part 1224 until it is close to the second longitudinal column sewing part 1224. A secondary air guide port 15 is formed between the end of the first longitudinal column sewing part 1223 and the second longitudinal column sewing part 1224. A secondary buffer cavity 16 is formed between the first longitudinal column sewing part 1223, the second longitudinal column sewing part 1224 and the transverse column sewing part 1221.

[0073] Specifically, by extending the first longitudinal column sewing part 1223 further toward the direction of the second longitudinal column sewing part 1224, the buffer zone 13 corresponding to the column sewing area 122 can be further thickened to avoid the A-pillar roof being damaged due to excessive thickness of the buffer zone 13 corresponding to the column sewing area 122. In addition, after extending the first longitudinal column sewing part 1223 further toward the second longitudinal column sewing part 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 part 1223 extending laterally to the second longitudinal column sewing part 1224 can be configured as a curved structure to increase the area of ​​the thickened region. For example, it can be configured as an inverted V-shape.

[0075] In some embodiments, when the column thickening area formed in the column sewing area 122 corresponds to the C-column, the column sewing area 122 includes a first longitudinal column sewing part 1223 and a second longitudinal column sewing part 1224 disposed at both ends of the transverse column sewing part 1221; wherein, the first longitudinal column sewing part 1223 extends upward at an angle to near the top seam of the pouch 10, and then extends downward at an angle to connect with the longitudinal seam of the pouch 10, forming a secondary air vent 15 between the first longitudinal column sewing part 1223 and the top seam of the pouch 10, and forming a secondary buffer cavity 16 between the first longitudinal column sewing part 1223 and the longitudinal pouch 10 seam of the pouch 10, and the second longitudinal column sewing part 1224 extends upward, and the end away from the transverse column sewing part 1221 is bent into an arc-shaped structure or provided with a locking structure.

[0076] The secondary buffer chamber 16 is used to provide a buffering effect and reduce the inflation efficiency of the buffer zone 13 corresponding to the column sewing area 122, so as 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 backflow gas from the rear protection chamber 117 when the rear protection chamber 117 is impacted, so as to reduce the injury to the occupants.

[0078] like Figure 1 As shown, the bottom rear seam of the bladder 10 extends downward to form a protrusion 17 after the bladder 10 inflates; wherein, when the occupant lies down in the car and the bladder 10 inflates and deploys, the occupant's head corresponds to the protrusion 17 to protect the occupant's head in a collision event.

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

[0080] For example, multiple vertical sutures can be provided on the pouch 10 to form multiple anterior protective cavities 113.

[0081] By configuring the front protection chamber 113 as multiple vertical chambers and a horizontal front air passage protection chamber 112, the front protection chamber 113 can be quickly filled and deployed while providing good protection for the occupants. The front protection chamber 113 also provides good support between the side curtain airbags and the car door panels.

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

[0083] Furthermore, a buffer seam is provided on the side of the non-inflatable part 114 near the front end of the pouch 10. The buffer seam is C-shaped, with one end connected to the seam of the non-inflatable part 114 and the other end spaced apart from the non-inflatable part 114, and located above the bottom seam of the pouch 10 to form a middle buffer part 115.

[0084] A transverse cavity 116 is formed below the non-inflatable part 114 and the middle buffer part 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 the side of the non-inflatable part 114 near the rear end of the bladder 10. The rear protection cavity 117 is a longitudinal cavity and is provided in correspondence with another air outlet 21 of the air guide bag 20. It is used to protect the rear passengers, such as the passengers in the child seat.

[0086] For example, the rear protective chamber 117 is located approximately at position Q3 of the side curtain airbag and is used to protect occupants in child seats.

[0087] Among them, a rear buffer cavity 118 is provided on the side of the rear protective cavity 117 away from the non-inflatable part 114, which is used to buffer the rear protective cavity 117.

[0088] Specifically, the rear buffer cavity 118 is formed by a rear buffer seam, which is inverted U-shaped, and one end near the rear protective cavity 117 forms an airway that communicates with the rear protective cavity 117.

[0089] Specifically, the transverse cavity 116 formed below the non-inflatable part 114 and the middle buffer part 115 of this application is connected to the front protection cavity 113 and the rear protection cavity 117, respectively, so that the gas in the front protection cavity 113 and the rear protection cavity 117 of the bag 10 can flow to each other so that the front protection cavity 113 and the rear protection cavity 117 can be quickly deployed.

[0090] The side curtain airbag of the present invention, by providing a pocket-shaped flower pattern at the top of the airbag 10 and located near the gas generator, can divert the gas generated by the gas generator, ensuring that the main cavity of the airbag is quickly filled and providing rapid support for the occupant; it can also reduce the impact of the airbag on the surrounding environment, ensure that the upper inflation area of ​​the airbag has sufficient overlap with the vehicle body, and the airbag is supported by the vehicle body, forming better rigidity and providing stronger support and protection for the occupant; this application can also control the size of the air inlet 111 of the pocket-shaped flower pattern to ensure that the internal pressure of the airbag cavity is stable when the occupant comes into contact with and is squeezed by the airbag.

[0091] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the descriptions are relatively simple, and the relevant parts can be referred to the descriptions in the system embodiments.

[0092] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A side curtain airbag, comprising a pouch and an air guide bag, wherein the pouch has at least one protective cavity, the air guide bag is disposed within the pouch, and at least one air outlet of the air guide bag faces the air inlet of the protective cavity, characterized in that, The pouch also includes: Multiple sewing zones are sewn at intervals at the top of the pouch, forming multiple thickening areas at the top of the pouch. Multiple buffer zones are formed between the multiple sewing zones and the top seam of the pouch. A primary air duct is formed between the top seam of each sewing zone and the top seam of the pouch, connecting the buffer zone. The expansion size of the primary air duct 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 duct bag. The sewing area is at least divided into an interior sewing area. The interior thickness reduction area formed by the interior sewing area corresponds to the interior trim of the car headliner. The interior sewing area includes a horizontal interior sewing part and two vertical interior sewing parts connected to the horizontal interior sewing part. The two vertical interior sewing parts are located at both ends of the horizontal interior sewing part. The top of the vertical interior sewing part and the top seam of the pouch form the first-stage air vent. After the buffer zone is formed at the top of the pouch, the air intake of the buffer zone can be limited through the first-stage air vent. After the bag is inflated, the plurality of thickened areas are correspondingly arranged with one or more of the car headliner, A-pillar headliner, and C-pillar headliner, and the plurality of thickened areas form a support surface on the side of the bag facing the car body to increase the contact area with the car body.

2. The side curtain air vent according to claim 1, characterized in that, The multiple sewing areas are further divided into column sewing areas, and the column thickness reduction area formed by the column sewing area is set in correspondence with the A column or C column.

3. The side curtain air vent according to claim 2, characterized in that, The ends of the two longitudinal interior sewing parts away from the transverse interior sewing parts are bent into an arc-shaped structure, or the ends of the two longitudinal interior sewing parts away from the transverse interior sewing parts are provided with a locking structure.

4. The side curtain airbag according to any one of claims 2 to 3, characterized in that, The column sewing area includes a transverse column sewing section and at least one longitudinal column sewing section connected to the transverse column sewing section. The at least one longitudinal column sewing section is located at one end of the transverse column sewing section near the air guide bag. The first-level air guide port is formed between the top end of the longitudinal column sewing section and the top seam of the bag.

5. The side curtain air vent according to claim 4, characterized in that, The column sewing area includes two longitudinal column sewing sections disposed at both ends of the transverse column sewing section; The two longitudinal column sewing portions extend upwards, and the ends away from the transverse column sewing portions are bent into an arc shape or have a locking structure.

6. The side curtain air vent according to claim 4, characterized in that, The column sewing area includes a first longitudinal column sewing part and a second longitudinal column sewing part disposed at both ends of the transverse column sewing part; The first longitudinal column sewing part extends upward and its end away from the transverse column sewing part is bent into an arc shape or has a locking structure; the second longitudinal column sewing part extends upward at an angle and is connected to the top seam or longitudinal seam of the pouch.

7. The side curtain air vent according to claim 6, characterized in that, When the column thickening area formed in the column sewing area corresponds to the column A, the first longitudinal column sewing part extends upward and continues to extend in the direction of the second longitudinal column sewing part until it is close to the second longitudinal column sewing part, and a secondary air guide is formed between the end of the first longitudinal column sewing part and the second longitudinal column sewing part, and a secondary buffer cavity is formed between the first longitudinal column sewing part, the second longitudinal column sewing part and the transverse column sewing part.

8. The side curtain air vent according to claim 4, characterized in that, When the column thickening area formed in the column sewing area corresponds to the C-column, the column sewing area includes a first longitudinal column sewing part and a second longitudinal column sewing part disposed at both ends of the transverse column sewing part; The first longitudinal column sewing part extends upward at an angle to near the top seam of the pouch, and then extends downward at an angle to connect with the longitudinal seam of the pouch. A secondary air vent is formed between the first longitudinal column sewing part and the top seam of the pouch, and a secondary buffer cavity is formed between the first longitudinal column sewing part and the longitudinal pouch seam of the pouch. The second longitudinal column sewing part extends upward, and the end away from the transverse column sewing part is bent into an arc shape or has a locking structure.

9. The side curtain air vent according to claim 1, characterized in that, The bottom rear seam of the bag extends downward to form a protrusion after the bag expands. When the occupant lies down inside the vehicle and the bag inflates and deploys, the occupant's head aligns with the protrusion to protect the occupant's head during a collision.

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