Side air curtain and safety air bag

Abstract

The invention discloses a side air curtain and a safety air bag, the side air curtain comprises a bag, and the bag comprises a non-inflatable part, a first rear protection cavity and a guide suture. Wherein the non-inflation part extends in the longitudinal direction of the bag, the top end of the non-inflation part and the top end of the bag form a gas passing cavity, and the non-inflation part is used for corresponding to an automobile B column; the first rear protection cavity extends in the longitudinal direction of the bag, is located on the side, close to the rear end of the bag, of the non-inflation part and communicates with the gas passing cavity. The guiding suture is formed on the rear side of the top end of the bag, located in the gas passing cavity and recessed in the direction where the first rear protection cavity is located. According to the automobile safety seat, air can rapidly enter the first rear protection cavity, the side air curtain slightly flies outwards and then enters the position between the safety seat and the automobile door panel in cooperation with the rolling and folding mode of the first rear protection cavity, passengers on the automobile safety seat are protected, and the problem that in the prior art, the unfolding speed of the side air curtain at the position Q3 is low is solved.

Description

Technical Field

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

[0002] After the side air curtain is deployed, the area on the side air curtain corresponding to the rear Q3 position of the car (the position between the rear seats of the car and the front seats of the car) is used to protect children in the rear child seats. As the regulations become increasingly stringent, the current regulations have also increased the protection requirements for the rear Q3 position of the car.

[0003] The existing side curtain airbags provide weak protection for the Q3 position. The side curtain airbags inflate and deploy slowly at the Q3 position, making it difficult to effectively protect children in child seats. There is also a risk of hitting people's heads after the side curtain airbags deploy and float inward.

[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 side curtain airbag and a safety airbag to at least solve the problem of slow deployment speed of the side curtain airbag at the Q3 position in the prior art.

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

[0007] An embodiment of the present invention provides a side air curtain, including a bag, wherein the bag includes:

[0008] a non-inflatable portion, the non-inflatable portion extending in the longitudinal direction of the bladder bag, and a top end of the non-inflatable portion and a top end of the bladder bag forming a gas passage cavity, the non-inflatable portion being used to correspond to a B-pillar of a car;

[0009] a first rear protection cavity, which extends in the longitudinal direction of the bladder bag and is located on a side of the non-inflatable portion close to the rear end of the bladder bag and is connected to the gas passage cavity;

[0010] A guide suture, which is formed at the rear side of the top of the bladder bag and is located in the gas passage cavity and is recessed in the direction of the first rear protection cavity, and is used to form an inner convex portion in the bladder bag after the bladder bag is inflated to guide the airflow to flow toward the first rear protection cavity;

[0011] Wherein, the bag is configured to be folded when installed, with at least the middle part being rolled up, and during the process of the bag being inflated and unfolded, the inner convex part formed by the guide seam guides the airflow to quickly enter the first rear protective cavity, so that the first rear protective cavity unfolds downward and enters between the car safety seat and the car door panel.

[0012] Furthermore, the side air curtain also includes:

[0013] a rear buffer chamber, the rear buffer chamber being arranged at a side of the first rear protective chamber away from the non-inflatable portion and being communicated with the first rear protective chamber so that gas first flows to the first rear protective chamber to maintain the working pressure of the first rear protective chamber;

[0014] After the first rear protection cavity is filled with gas, the gas in the first rear protection cavity can flow into the rear buffer cavity, so that the first rear protection cavity can be concave when the first rear protection cavity is hit to protect the occupant.

[0015] Furthermore, the middle portion of the bottom seam of the pouch is configured in a “J” shape to form the non-inflatable portion in the middle of the pouch.

[0016] Further, a first airway is formed between the guide suture and the non-inflatable portion, and a second airway is formed between the guide suture and the rear buffer cavity;

[0017] The first air channel faces the gas passage cavity, and the expansion size of the first air channel is greater than the expansion size of the second air channel. The first air channel is used to guide the airflow to flow toward the first rear protection cavity.

[0018] Furthermore, the pouch comprises:

[0019] A rear buffer suture portion, wherein the rear buffer suture portion is sewn at the rear end of the sac and is spaced apart from the non-inflatable portion to form the first rear protection cavity between the rear buffer suture portion and the non-inflatable portion, wherein the rear buffer suture portion is an inverted U-shaped structure as a whole, and cooperates with the bottom suture of the sac to form the rear buffer cavity, and a primary buffer airway is formed on a side suture of the rear buffer suture portion close to the first rear protection cavity, and the rear buffer cavity is connected to the first rear protection cavity through the primary buffer airway;

[0020] A graded suture portion, wherein the graded suture portion is sewn on the sac along the longitudinal direction of the sac and is located inside the rear buffer suture portion to separate the rear buffer cavity into a primary rear buffer cavity and a secondary rear buffer cavity, and a secondary buffer airway is formed between the graded suture portion and the rear buffer suture portion or the bottom suture of the sac, wherein the primary rear buffer cavity is communicated with the first rear protection cavity through the primary buffer airway, and is communicated with the secondary rear buffer cavity through the secondary buffer airway.

[0021] Furthermore, the pouch further comprises:

[0022] A lock sewing portion is sewn on the bladder bag and is located in the secondary rear buffer cavity, and is used to limit the unfolded thickness of the secondary rear buffer cavity.

[0023] Furthermore, a second rear protection cavity is formed between the rear buffer suture portion and the rear end suture of the sac, and the second rear protection cavity is longitudinally arranged, and the second rear protection cavity is connected with the gas passage cavity through the first airway.

[0024] Furthermore, the pouch further comprises:

[0025] A front buffer cavity is arranged at the front end of the bladder bag along the longitudinal direction of the bladder bag, and a front protection cavity is formed between the front buffer cavity and the non-inflatable portion.

[0026] Further, the pouch includes a first front suture portion and a second front suture portion connected to the first front suture portion;

[0027] The first front suture portion is in a U-shaped structure to form a first front buffer cavity at the front end of the pouch, and two ends of the first front suture portion are spaced apart from the top suture of the pouch to form a first front airway of the first front buffer cavity;

[0028] The second front suture portion is bent and extended downward from one end of the first front suture portion close to the non-inflatable portion to form a second front buffer cavity between the second front suture portion and the first front suture portion, and its bottom end is close to the bottom end of the first front suture portion to form a second front airway of the second front buffer cavity between the bottom end of the second front suture portion and the first front suture portion; or

[0029] The first front seam portion and the second front seam portion are arranged in an overall inverted M-shaped structure.

[0030] The present invention also provides a safety airbag, comprising:

[0031] Side curtain airbags as described in any one of the above;

[0032] An air guide bag, wherein the air guide bag is arranged in the side air curtain, and an air outlet of the air guide bag faces the guide seam and the rear buffer cavity of the side air curtain;

[0033] Wherein, the side air curtain is configured to be folded in a Z-fold and roll-fold form.

[0034] 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:

[0035] A side air curtain of the present invention sets the area corresponding to the B-pillar on the side air curtain as a non-inflatable part, sets a first rear protection cavity on a side of the non-inflatable part close to the rear end, and then sets a guide stitch on the rear side of the top end of the bag belt to guide the gas obtained by the gas cavity to the first rear protection cavity, so that the gas can quickly enter the first rear protection cavity, and then the side air curtain is slightly floated outwards in accordance with the rolling mode of the first rear protection cavity to enter between the safety seat and the car door panel to protect the occupant on the car safety seat, thereby solving the problem of slow deployment speed of the side air curtain at the Q3 position in the prior art;

[0036] Furthermore, by providing a rear buffer chamber and connecting the rear buffer chamber with the first rear protection chamber, the first rear protection chamber can be continuously inflated, and when the first rear protection chamber is hit by a car safety seat, the gas in the first rear protection chamber can also enter the rear buffer chamber to play a buffering and protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1 This is a schematic structural diagram of a first implementation mode of a side curtain airbag in an embodiment of the present invention;

[0039] Figure 2 This is a schematic structural diagram of a second implementation mode of a side air curtain in an embodiment of the present invention;

[0040] Figure 3 Schematic diagram of folding and unfolding of a side air curtain according to an embodiment of the present invention.

[0041] The accompanying drawings of the present invention are as follows:

[0042] 10. Bag; 11. Non-inflatable part; 12. First rear protective cavity; 13. Guide suture; 14. Rear buffer cavity; 15. First airway; 16. Second airway; 17. Rear buffer suture part; 171. Primary buffer airway; 18. Graded suture part; 181. Primary rear buffer cavity; 182. Secondary rear buffer cavity; 183. Secondary buffer airway; 19. Lock stitch part; 20. Second rear protective cavity; 21. Front buffer cavity; 22. Front protective cavity; 23. First front suture part; 231. First front airway; 232. First front buffer cavity; 24. Second front suture part; 241. Second front airway; 242. Second front buffer cavity; 25. Gas passage cavity. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] With the rapid development of the automobile industry, the automobile passive safety industry is becoming more and more mature. However, when dealing with vehicles with child safety seats, since the child safety seats move the occupants' position forward, the existing side airbags may have difficulty protecting the child seats at the Q3 position.

[0049] Furthermore, since the child safety seat is close to the car door panel, it may be difficult for the side airbag to enter between the child safety seat and the car door panel during the deployment process, resulting in the side airbag being unable to protect the occupant of the child seat.

[0050] Based on this, this specification embodiment proposes a processing solution: Figure 1 As shown, a side air curtain of the present invention is provided by setting a non-inflatable portion 11 to correspond to the B-pillar of the automobile, then providing a first rear protection cavity 12 on one side of the non-inflatable portion 11 close to the rear end of the bag belt, and finally providing a guide stitch 13 on the rear side of the top end of the bag belt to allow gas to quickly enter the first rear protection cavity 12, so that the side air curtain can be quickly deployed at the Q3 position to protect the occupant of the child seat;

[0051] Furthermore, by providing the rear buffer chamber 14 , the inflation time of the first rear protection chamber 12 can be guaranteed, and at the same time, a buffering effect can be played to protect the occupant on the child seat.

[0052] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0053] Example 1

[0054] A side air curtain according to an embodiment of the present invention, such as Figures 1 to 3 As shown, it includes a bag 10, which includes a non-inflatable portion 11, a first rear protection cavity 12 and a guide stitch 13. The non-inflatable portion 11 extends in the longitudinal direction of the bag 10, and its top end forms a gas passage cavity 25 with the top end of the bag 10, and the non-inflatable portion 11 is used to correspond to the B-pillar of the car; the first rear protection cavity 12 extends in the longitudinal direction of the bag 10, and is located on the side of the non-inflatable portion 11 close to the rear end of the bag 10, and is connected to the gas passage cavity 25; the guide stitch 13 is formed on the rear side of the top end of the bag 10, and is located in the gas passage cavity 25, and is used to guide the airflow to flow to the first rear protection cavity 12; wherein the bag 10 is configured to be rolled up at least in the middle part when it is installed and folded, and in the process of the bag 10 being inflated, unfolded and floating outward, the guide stitch 13 guides the airflow to quickly enter the first rear protection cavity 12 so that the first rear protection cavity 12 is unfolded downward and enters between the car safety seat and the car door panel.

[0055] In the present application, the top end of the bag 10 is the top end when the bag 10 is installed in the car and unfolded downward, the rear end is the part when the bag 10 is installed in the car and located at the rear end of the car body, the front end is the part when the bag 10 is installed in the car and located at the front end of the car body; the bottom end is the bottom end of the bag 10 after it is installed in the car and unfolded.

[0056] The non-inflatable portion 11 is a closed area formed on the bag 10 by stitching.

[0057] After the side air curtain is deployed, the non-inflatable portion 11 is at least arranged corresponding to the B-pillar of the vehicle to facilitate rapid deployment of the side air curtain.

[0058] For example, the middle portion of the bottom end seam of the bag band is configured in a zigzag shape to form a non-inflatable portion 11 in the middle of the bag band.

[0059] The middle part of the bottom seam of the bag band can also be configured as an inverted U-shape, an inverted V-shape or the like.

[0060] The first rear protection cavity 12 is a longitudinal cavity. After the side air curtain is deployed, the first rear protection cavity 12 extends from the top of the bag belt to the bottom of the bag 10 and abuts against the upper edge of the car door panel after deployment.

[0061] The top of the first rear protection cavity 12 is provided with an opening, and is communicated with the gas passage cavity 25 to obtain the gas flowing through the gas passage cavity 25 .

[0062] In some of the embodiments, the first rear protective cavity 12 can extend obliquely from the top of the bag 10 to the rear end of the bag 10 and extend to the bottom end of the bag band to facilitate the flow of gas and avoid direct impact of the gas on the stitches forming the first rear protective cavity 12, resulting in kinetic energy loss or the stitches being broken open.

[0063] The first rear protection cavity 12 at least covers the Q3 position of the side air curtain to protect the occupant on the child safety seat.

[0064] Among them, the guide stitch 13 can be extended from the top stitch part of the bladder 10 to the middle part of the bladder 10, so that when the side air curtain is inflated and unfolded, the guide stitch 13 forms an inner convex portion in the bladder 10, thereby guiding the airflow to flow toward the first rear protective cavity 12 through the inner convex portion.

[0065] The inner convex portion is a portion protruding from the top edge of the pouch 10 toward the inside of the pouch 10 .

[0066] In some of the embodiments, the guide suture 13 may be formed using an additional suture, such as an inclined suture, to adjust the shape of the guide suture 13 and subsequently adjust the shape of the inner protrusion.

[0067] The bag 10 of the present application is at least partially rolled up during installation, so that when the bag 10 is inflated and unfolded, the bag 10 slightly floats outward to enter between the child seat and the car door panel.

[0068] Specifically, when the side air curtain is inflated, the gas first enters the gas passage chamber 25, and then the gas flows to the first rear protection chamber 12 under the obstruction and guidance of the inner convex portion, so that the first rear protection chamber 12 is quickly filled and expanded; and because the folding method of the bag 10 includes rolling, the bag 10 will float slightly outward when expanded, allowing the side air curtain to enter between the child safety seat and the car door panel, so as to protect the occupants in the child seat.

[0069] Furthermore, the side air curtain also includes a rear buffer chamber 14, which is arranged on a side of the first rear protection chamber 12 away from the non-inflatable portion 11 and is connected to the first rear protection chamber 12 so that the gas first flows to the first rear protection chamber 12 to maintain the working pressure of the first rear protection chamber 12; wherein, after the first rear protection chamber 12 is filled with gas, the gas in the first rear protection chamber 12 can flow into the rear buffer chamber 14, so that when the first rear protection chamber 12 is hit, it can be concave to protect the occupants.

[0070] The rear buffer chamber 14 is used to play a buffering role, so that when the first rear protective chamber 12 is collided, the gas in the first rear protective chamber 12 enters the rear buffer chamber 14 .

[0071] Among them, by setting the rear buffer chamber 14 to be connected with the first rear protection chamber 12, the gas first enters the first rear protection chamber 12 and then enters the rear buffer chamber 14, so that the first rear protection chamber 12 can be deployed first, avoiding the gas being diverted to the rear buffer chamber 14 first, resulting in a slow deployment speed of the first rear protection chamber 12. When the output time of the gas generator is long, the gas can also gradually flow to the rear buffer chamber 14 through the first rear protection chamber 12 to extend the inflation time of the first rear protection chamber 12.

[0072] Furthermore, the connection port between the rear buffer cavity 14 and the first rear protective cavity 12 is located in the middle of the first rear protective cavity 12 so that the first rear protective cavity 12 can be deployed first.

[0073] In the present application, the guide suture 13 is located above the first protective cavity and extends in the direction of the first rear protective cavity 12, so that a first air channel 15 is formed between the guide suture 13 and the non-inflatable part 11, and a second air channel 16 is formed between the guide suture 13 and the rear buffer cavity 14; wherein, the first air channel 15 is toward the gas passage cavity 25, and the expansion size of the first air channel 15 is greater than the expansion size of the second air channel 16, and the first air channel 15 is used to guide the airflow to flow toward the first rear protective cavity 12.

[0074] The size of the first air passage 15 is set larger than that of the second air passage 16 , so that the gas first flows to the first rear protection chamber 12 in large quantities under the guidance of the inner convex portion, so that the first rear protection chamber 12 is first deployed to protect the occupant on the child seat.

[0075] In some of the embodiments, the bag 10 includes a rear buffer suture portion 17 and a graded suture portion 18, the rear buffer suture portion 17 is sewn at the rear end of the bag 10, and is spaced apart from the non-inflatable portion 11 to form a first rear protective cavity 12 between the rear buffer suture portion 17 and the non-inflatable portion 11, wherein the rear buffer suture portion 17 is an inverted U-shaped structure as a whole, and cooperates with the bottom suture of the bag 10 to form a rear buffer cavity 14, and a first-level buffer airway 171 is formed on the suture on one side of the rear buffer suture portion 17 close to the first rear protective cavity 12, and the rear buffer cavity 14 passes through the first buffer airway The grading suture portion 18 is sewn on the bag 10 along the longitudinal direction of the bag 10 and is located inside the rear buffer suture portion 17 to separate the rear buffer cavity 14 into a primary rear buffer cavity 181 and a secondary rear buffer cavity 182, and a secondary buffer airway 183 is formed between the grading suture portion 18 and the rear buffer suture portion 17 or the bottom suture of the bag 10, wherein the primary rear buffer cavity 181 is communicated with the first rear protection cavity 12 through the primary buffer airway 171, and is communicated with the secondary rear buffer cavity 182 through the secondary buffer airway 183.

[0076] Among them, the top end of the rear buffer stitching portion 17 can be set to be inclined according to actual needs. For example, the top end of the rear buffer stitching portion 17 is inclined downward from the side close to the middle of the bladder bag 10 to the side close to the rear end of the bladder bag 10 to adjust the air intake rate or the expansion size of the rear side of the top end of the bladder bag 10.

[0077] The suture on one side of the rear buffer suture portion 17 close to the first rear protective cavity 12 is segmented to form a primary buffer airway 171 , and the gas in the first rear protective cavity 12 can flow into the rear buffer cavity 14 through the primary buffer airway 171 .

[0078] The primary buffer air duct 171 may be disposed at the bottom or middle of the first rear protection cavity 12 .

[0079] Among them, the graded suture part 18 can be a suture arranged in sections to form a secondary buffer airway 183, or it can be an integrally sewn suture, which is spaced apart from the rear buffer suture part 17 or the suture at the bottom end of the bag 10 to form a secondary buffer airway 183.

[0080] When the gas enters the rear buffer chamber 14 from the first rear protection chamber 12 , it first enters the first-level rear buffer chamber 181 through the first-level buffer air channel 171 , and then, after the gas is sufficient and the first-level rear buffer chamber 181 expands, the gas enters the second-level rear buffer chamber 182 through the second-level buffer air channel 183 .

[0081] Among them, the first-level rear buffer chamber 181 and the second-level rear buffer chamber 182 can play a secondary buffering role for the first rear protection chamber 12. When dealing with a gas generator with a longer output time, it can ensure that the first rear protection chamber 12 has a longer inflation time, providing sufficient buffering effect for the first rear protection chamber.

[0082] Furthermore, the bag 10 also includes a lock sewing portion 19, which is sewn on the bag 10 and located in the secondary rear buffer cavity 182, and is used to limit the unfolded thickness of the secondary rear buffer cavity 182 to prevent the secondary rear buffer cavity 182 from expanding too thick, resulting in squeezing the child seat and pushing the child seat to tilt.

[0083] Among them, the lock sewing part 19 can be set to multiple according to needs, and is arranged at intervals along the length direction of the secondary rear buffer cavity 182.

[0084] In some of the embodiments, a lock sewing portion 19 may also be provided in the primary rear buffer cavity 181 to limit the thickness of the primary rear buffer cavity 181 or to limit the rate at which gas flows to the secondary rear buffer cavity 182 .

[0085] Furthermore, a second rear protection cavity 20 is formed between the rear buffer suture portion 17 and the rear end suture of the bladder bag 10 , and the second rear protection cavity 20 is longitudinally arranged. The second rear protection cavity 20 is connected to the gas passage cavity 25 through the first airway 15 .

[0086] The second rear protection cavity 20 is longitudinally arranged at the rear end of the pouch 10 to provide protection.

[0087] Furthermore, the bladder bag 10 further includes a front buffer cavity 21 , which is disposed at the front end of the bladder bag 10 along the longitudinal direction of the bladder bag 10 , and a front protective cavity 22 is formed between the front buffer cavity 21 and the non-inflatable portion 11 .

[0088] The front protection cavity 22 is used to protect the front row occupants, and the front buffer cavity 21 is used to protect the front protection cavity 22 .

[0089] Specifically, after the gas enters the front protection cavity 22 , if the front protection cavity 22 is collided, the gas in the front protection cavity 22 can flow into the front buffer cavity 21 , thereby preventing the front protection cavity 22 from being too rigid and hurting the occupants.

[0090] Specifically, the bag 10 includes a first front suture portion 23 and a second front suture portion 24 connected to the first front suture portion 23; the first front suture portion 23 is in a U-shaped structure to form a first front buffer cavity 21 at the front end of the bag 10, and the two ends of the first front suture portion 23 are spaced apart from the top suture of the bag 10 to form a first front airway 231 of the first front buffer cavity 21; the second front suture portion 24 is bent and extended downward from one end of the first front suture portion 23 close to the non-inflatable portion 11 to form a second front buffer cavity 21 between the second front suture portion 24 and the first front suture portion 23, and its bottom end is close to the bottom end of the first front suture portion 23 to form a second front airway 241 of the second front buffer cavity 21 between the bottom end of the second front suture portion 24 and the first front suture portion 23.

[0091] There is a gap between the front end of the first front suture portion 23 and the front end suture of the bladder bag 10 to form another air intake channel, so that the gas can enter the first front buffer cavity 21 from the front protection cavity 22 .

[0092] There is a preset distance between the bottom end of the second front stitching portion 24 and the bottom end of the stitching of the bladder bag 10 , so that the lower half of the bladder bag 10 expands into a transverse cavity to receive the occupant's head in a collision event.

[0093] In some of the embodiments, the first front suture portion 23 and the second front suture portion 24 are arranged in an M-shaped structure, and there is a gap between the first front suture portion 23 and the second front suture portion 24 and the top suture of the bag 10 to form the first front air channel 231 and the second front air channel 241.

[0094] The side air curtain of the present application is provided with a guide seam 13 and the middle part of the side air curtain is set to be rolled up, so that the air bag can float slightly outward after being deployed and smoothly enter the gap between the car door panel and the child seat. Then, with the design of the secondary buffer area of ​​the rear buffer cavity 14, the air bag can maintain a certain pressure to ensure that the side air curtain supports the occupant.

[0095] This embodiment sets the middle part of the side air curtain to be folded, thereby ensuring that the side air curtain floats outward. During the floating process of the side air curtain, the airflow quickly enters the first rear protection cavity 12 under the action of the guide seam 13, so that the first rear protection cavity 12 is quickly unfolded, so that the side air curtain enters between the child seat and the car door panel, and protects the occupant in the child seat at the same time.

[0096] Example 2

[0097] like Figure 3As shown, the present invention also provides a safety airbag, comprising a side air curtain and an air guide bag as described in any one of Example 1, wherein the air guide bag is arranged in the side air curtain, and an air outlet of the air guide bag is facing the guide seam 13 and the rear buffer cavity 14 of the side air curtain; wherein the side air curtain is configured to be folded in a Z-fold and roll-fold form.

[0098] Specifically, the side curtain airbag is configured to be folded in a Z-fold and a roll-fold form.

[0099] The mature folding scheme of the airbag 1Z fold + rolling fold of the present embodiment designs a concave shape (guide stitch 13) above the airbag Q3 position to guide more gas into the Q3 cavity (the first rear protection cavity 12 body) and produce a slightly outward expansion effect, so that the airway can be deployed more quickly and can smoothly enter between the child seat and the car door panel, thereby playing a buffering role earlier. And because of the stricter regulations, in view of FMVSS226 (purpose: to reduce the damage to the occupant's head in the window area in rollover and side collision accidents; requirement: after the airbag is deployed (1.5s&6s), the human head hits the airbag at a certain speed, and the airbag does not exceed 100mm from the window) and Audi's stricter requirements for this item (the requirements must also be met under the condition that the airbag is pushed out of the window; so the airbag design requires a large vertical cavity for effective support. At the same time, considering that the generator output time is long and the airbag protection range is large, resulting in a large airbag volume, a multi-stage inflation buffer zone is set in the airbag, so that when a collision occurs, the airbag maintains a certain working pressure within the effective working time (40-70ms), ensuring that the airbag can meet the requirements of FMVSS226 after it is fully filled.

[0100] The safety airbag of the present invention can make the side air curtain quickly unfold and enter between the child seat and the car door panel by controlling the direction of airflow and the deployment direction of the airbag. A plurality of large longitudinal cavities are arranged on the side air curtain (the deployment thickness of the first rear protection cavity 12 and the second rear protection cavity 20 is recommended to be more than 130 mm), which can also ensure that the side air curtain has strong support. The airbag is provided with a multi-stage inflation buffer zone, so that the larger side air curtain can maintain a certain working pressure within the effective working time (40ms~70ms) when used with a generator with a longer output time.

[0101] 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.

[0102] 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 curtain airbag, characterized in that: A pouch comprising: a non-inflatable portion, the non-inflatable portion extending in the longitudinal direction of the pouch, and a top end of the non-inflatable portion and a top end of the pouch forming a gas passage cavity; a first rear protection cavity, which extends in the longitudinal direction of the bladder bag and is located on a side of the non-inflatable portion close to the rear end of the bladder bag and is connected to the gas passage cavity; A guide suture, formed at the rear side of the top end of the bladder and located in the gas passage cavity, and used to form an inner convex portion in the bladder after the bladder is inflated to guide the airflow to flow toward the first rear protection cavity; Wherein, the bag is configured to be folded when installed, with at least the middle part being rolled up, and during the process of the bag being inflated and unfolded, the inner convex part formed by the guide seam guides the airflow to quickly enter the first rear protective cavity, so that the first rear protective cavity unfolds downward and enters between the car safety seat and the car door panel.

2. The side curtain airbag according to claim 1, characterized in that: Also includes: a rear buffer chamber, the rear buffer chamber being arranged at a side of the first rear protective chamber away from the non-inflatable portion and being communicated with the first rear protective chamber so that gas first flows to the first rear protective chamber to maintain the working pressure of the first rear protective chamber; After the first rear protection cavity is filled with gas, the gas in the first rear protection cavity can flow into the rear buffer cavity, so that the first rear protection cavity can be concave when the first rear protection cavity is hit to protect the occupant.

3. The side curtain airbag according to claim 2, characterized in that: The middle portion of the bottom suture of the sac is configured in a "J" shape to form the non-inflatable portion in the middle of the sac.

4. The side curtain airbag according to claim 3, characterized in that: A first air channel is formed between the guide suture and the non-inflatable portion, and a second air channel is formed between the guide suture and the rear buffer cavity; The first air channel faces the gas passage cavity, and the expansion size of the first air channel is greater than the expansion size of the second air channel. The first air channel is used to guide the airflow to flow toward the first rear protection cavity.

5. The side curtain airbag according to any one of claims 1 to 4, characterized in that: The pouch comprises: A rear buffer suture portion, wherein the rear buffer suture portion is sewn at the rear end of the sac and is spaced apart from the non-inflatable portion to form the first rear protection cavity between the rear buffer suture portion and the non-inflatable portion, wherein the rear buffer suture portion is an inverted U-shaped structure as a whole, and cooperates with the bottom suture of the sac to form the rear buffer cavity, and a primary buffer airway is formed on a side suture of the rear buffer suture portion close to the first rear protection cavity, and the rear buffer cavity is connected to the first rear protection cavity through the primary buffer airway; A graded suture portion, wherein the graded suture portion is sewn on the sac along the longitudinal direction of the sac and is located inside the rear buffer suture portion to separate the rear buffer cavity into a primary rear buffer cavity and a secondary rear buffer cavity, and a secondary buffer airway is formed between the graded suture portion and the rear buffer suture portion or the bottom suture of the sac, wherein the primary rear buffer cavity is communicated with the first rear protection cavity through the primary buffer airway, and is communicated with the secondary rear buffer cavity through the secondary buffer airway.

6. The side curtain airbag according to claim 5, characterized in that: The pouch further comprises: A lock sewing portion is sewn on the bladder bag and is located in the secondary rear buffer cavity, and is used to limit the unfolded thickness of the secondary rear buffer cavity.

7. The side curtain airbag according to claim 5, characterized in that: A second rear protection cavity is formed between the rear buffer suture portion and the rear end suture of the sac, and the second rear protection cavity is longitudinally arranged. The second rear protection cavity is connected with the gas passage cavity through the first airway.

8. The side curtain airbag according to claim 5, characterized in that: The pouch further comprises: A front buffer cavity is arranged at the front end of the bladder bag along the longitudinal direction of the bladder bag, and a front protection cavity is formed between the front buffer cavity and the non-inflatable portion.

9. The side curtain airbag according to claim 8, characterized in that: The pouch includes a first front suture portion and a second front suture portion connected to the first front suture portion; The first front suture portion is in a U-shaped structure to form a first front buffer cavity at the front end of the pouch, and two ends of the first front suture portion are spaced apart from the top suture of the pouch to form a first front airway of the first front buffer cavity; The second front suture portion is bent and extended downward from one end of the first front suture portion close to the non-inflatable portion to form a second front buffer cavity between the second front suture portion and the first front suture portion, and its bottom end is close to the bottom end of the first front suture portion to form a second front airway of the second front buffer cavity between the bottom end of the second front suture portion and the first front suture portion; or The first front seam portion and the second front seam portion are arranged in an overall inverted M-shaped structure.

10. A safety airbag, characterized in that: include: The side curtain airbag according to any one of claims 1 to 9; An air guide bag, wherein the air guide bag is arranged in the side air curtain, and an air outlet of the air guide bag faces the guide seam and the rear buffer cavity of the side air curtain; Wherein, the side air curtain is configured to be folded in a Z-fold and roll-fold form.

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