A side curtain airbag

Abstract

The application discloses a side air curtain, which comprises a bag, the bag comprises an air inlet, a bag area below the air inlet is formed with a gas guide channel, a front end of the bag is provided with a pull belt, and the bag further comprises a top cavity suture and an oblique straight filling cavity. A head end of the top cavity suture is connected with a top end suture of the bag, extends to the front end of the bag to cooperate with the top end suture of the bag to form a top buffer cavity, and a tail end of the top cavity suture forms a buffer air inlet of the top buffer cavity between the top end suture of the bag and / or a front end suture of the bag; the oblique straight filling cavity is formed below the top buffer cavity, extends from a front end of the gas guide channel to a lower part of the front end of the bag, and a far end of the oblique straight filling cavity away from the gas guide channel is communicated with the top buffer cavity. The application can avoid the front end of the side air curtain from floating outwards from the window, and solves the problem that the air curtain is interfered with the edge of the window or floats outwards from the window when the air curtain is unfolded due to the fact that the air curtain is only folded in the prior art.

Description

Technical Field

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

[0002] According to current regulations, when the curtain airbag is deployed, it must not get stuck on the B-pillar, support the bottom edge of the window, or float out of the window. In existing technology, the curtain airbag is usually folded in a Z-shape and rolled up to prevent it from getting stuck on the B-pillar, supporting the bottom edge of the window, or floating out of the window. However, performing both Z-folding and rolling up at the same time undoubtedly increases the difficulty of rolling up the curtain airbag and requires higher skills from the operators.

[0003] In existing technologies, simply rolling up the curtain airbag not only reduces the difficulty of rolling it up but also lowers the skill requirements for workers. However, when a curtain airbag formed by simply rolling up is installed on a vehicle body, such as... Figure 1 As shown, the air curtain folds from the inside of the vehicle to the outside. Because the air curtain chamber inflates from top to bottom, during deployment, the top of the air curtain will unfold inwards, while the middle and bottom will fold outwards in one direction. Furthermore, after the lower middle section of the air curtain is inflated, it will sway, increasing the possibility / risk of the air curtain drifting out of the window.

[0004] Currently, no effective solution has been proposed to address the problem that existing technologies, which only involve folding air curtains, cause them to interfere with the edge of the car window or drift out of the window when 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 airbag only rolls up, causing it to interfere with the edge of the car window or drift out of the car window when it is deployed.

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

[0007] This invention provides a side curtain airbag, including a pouch with an air inlet. An air guide channel is formed in the pouch area below the air inlet. A pull strap is provided at the front end of the pouch. The pouch also includes:

[0008] The top cavity suture has its first end connected to the top suture of the pouch and extends toward the front end of the pouch to cooperate with the top suture of the pouch to form a top buffer cavity. The tail end of the top cavity suture forms a buffer air inlet of the top buffer cavity between the top suture of the pouch and / or the front suture of the pouch.

[0009] a slanting straight filling cavity formed below the top buffer cavity, the slanting straight filling cavity extending from the front end of the air guide channel to the lower front end of the airbag, and the end of the slanting straight filling cavity away from the air guide channel being in communication with the top buffer cavity;

[0010] wherein, when the airbag is inflated, the end of the slanting straight filling cavity away from the air guide channel can be supported against the inner side of the door panel after the slanting straight filling cavity is deployed, and the top buffer cavity is deployed and swings the slanting straight filling cavity towards the vehicle interior after the gas enters the top buffer cavity from the slanting straight filling cavity.

[0011] Further, the lower front end of the airbag extends downward to form a convex cavity region, and the convex cavity region is in communication with the end of the slanting straight filling cavity away from the air guide channel to increase the support area of the end of the slanting straight filling cavity away from the air guide channel and the inner side of the door panel.

[0012] Further, the airbag further comprises:

[0013] an air guide channel stitch sewn below the air inlet on the airbag, the leading end of the air guide channel stitch and the top end stitch of the airbag forming the air guide channel, and the trailing end of the air guide channel extending obliquely downward to the lower front end of the airbag;

[0014] a first bottom stitch extending from the bottom end stitch of the airbag to the trailing end of the air guide channel stitch, and the end of the first bottom stitch and the trailing end of the air guide channel stitch having a preset distance to form a bottom cavity air inlet;

[0015] wherein, the first bottom stitch, the trailing end of the air guide channel stitch, the top end stitch of the airbag, and the top cavity stitch together define the slanting straight filling cavity, the first bottom stitch and the bottom end stitch of the airbag forming a bottom cavity, and the bottom cavity being in communication with the slanting straight filling cavity through the bottom cavity air inlet.

[0016] Further, the airbag further comprises:

[0017] a second bottom stitch located on the side of the first bottom stitch close to the air guide channel stitch, the second bottom stitch extending obliquely from the bottom end stitch of the airbag to the first bottom stitch, and cooperating with the first bottom stitch and the bottom end stitch of the airbag to form a bottom sub-cavity, and the second bottom stitch and the first bottom stitch forming a bottom sub-cavity air inlet.

[0018] Further, the end of the second bottom seam line away from the bottom end seam line of the airbag is located between the tail end of the air guide channel seam line and the end of the first bottom seam line away from the bottom end seam line of the airbag, and the second bottom seam line, the first bottom seam line and the bottom end seam line of the airbag form the bottom sub-cavity, and the bottom sub-cavity is communicated with the oblique straight filling cavity through the bottom sub-cavity air inlet;

[0019] Further, the tail end of the air guide channel seam line, the second bottom seam line, the first bottom seam line, the top end seam line of the airbag and / or the top cavity seam line form the oblique straight filling cavity.

[0020] Further, the oblique straight filling cavity comprises a first section, a second section and a third section formed in sequence.

[0021] The tail end of the air guide channel seam line, the end of the second bottom seam line away from the bottom end seam line of the airbag and the head end of the top end cavity seam line or part of the top end seam line of the airbag form the first section, and the first section is used to drive the airbag to expand into the vehicle during inflation.

[0022] The end of the second bottom seam line away from the bottom end seam line of the airbag, the tail end of the top end cavity seam line, and part of the first bottom seam line form the second section, and the second section is used to make the gas enter the bottom sub-cavity after inflation to make the bottom end edge of the airbag flip out in advance.

[0023] Another part of the first bottom seam line, the tail end of the top end cavity seam line, the front end of the airbag and the lower end part of the seam line form the third section, and the third section is used to resist the inner side door panel of the vehicle door after being filled and guide the airflow to the top buffer cavity.

[0024] Further, the end of the second bottom seam line away from the bottom end seam line of the airbag is located below the end of the first bottom seam line away from the bottom end seam line of the airbag, and the second bottom seam line, the first bottom seam line and the bottom end seam line of the airbag form the bottom sub-cavity, and the bottom sub-cavity is communicated with the bottom cavity through the bottom sub-cavity air inlet.

[0025] Further, the tail end of the air guide channel seam line, the second bottom seam line, the first bottom seam line, the top end seam line of the airbag and / or the top cavity seam line form the oblique straight filling cavity.

[0026] Further, the first bottom seam line extends to the tail end of the air guide channel seam line to make the gas flowing to the front end of the airbag fill the oblique straight filling cavity quickly.

[0027] Further, the airbag further comprises:

[0028] a patterned stitching, which is sewn on the pocket and located in the oblique straight inflation cavity to limit the inflation thickness of the oblique straight inflation cavity.

[0029] Further, the pocket further comprises:

[0030] a front end stitching, which is located on the side of the first bottom stitching away from the air guide channel, and has one end connected with the bottom end stitching of the pocket and the other end having a preset distance from both the top cavity stitching and the front end stitching of the pocket, and is used to limit the thickness of the oblique straight inflation cavity.

[0031] Further, the pocket further comprises:

[0032] a middle extension cavity, which extends downward from the middle of the bottom end of the pocket and is used to protect the head of the occupant in a collision event when the occupant sits at a large inclination angle.

[0033] Compared with the prior art, the technical scheme adopted by the embodiment of the present application can achieve at least the following beneficial effects:

[0034] The side air curtain of the present application is provided with an oblique straight inflation cavity in the middle of the pocket, and a top buffer cavity is formed by the top cavity stitching at the top end of the oblique straight inflation cavity, so that after the gas enters the air guide channel, it can directly enter the oblique straight inflation cavity, so that the oblique straight inflation cavity is quickly unfolded and abuts against the inner side of the door, and finally the gas in the oblique straight inflation cavity flows into the top buffer cavity through the buffer air inlet, so as to swing the unfolded oblique straight inflation cavity towards the car, thereby avoiding the problem that the front end of the air curtain floats outwards from the window in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 It is a schematic diagram of the folding installation of the side air curtain;

[0037] Figure 2 It is a schematic diagram of the unfolding of the side air curtain of the present application (one);

[0038] Figure 3 It is a schematic diagram of the unfolding of the side air curtain of the present application (two);

[0039] Figure 4 Figure 6 is a side curtain deployment schematic (6) of the present application;

[0040] Figure 5 Figure 7 is a side curtain deployment schematic (7) of the present application;

[0041] Figure 6 Figure 8 is a side curtain deployment schematic (8) of the present application;

[0042] Figure 7 Figure 9 is a side curtain deployment schematic (9) of the present application.

[0043] The reference signs of the present application are as follows:

[0044] 10, pocket; 101, air inlet; 102, air guide channel; 103, pull strap; 104, top cavity suture; 105, top cushioning cavity; 106, oblique straight filling cavity; 107, convex cavity area; 108, air guide channel suture; 109, first bottom suture; 110, bottom cavity; 111, second bottom suture; 112, bottom sub-cavity; 113, first section; 114, second section; 115, third section; 116, pattern suture; 117, front end suture; 118, middle extension cavity. DETAILED DESCRIPTION

[0045] The embodiments of the present application will be described in detail below with reference to the drawings.

[0046] The embodiments of the present application will be described in detail below with reference to the drawings.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Because the side curtain airbag is restricted by folding when it is in its pure roll-up state, it may get stuck on the door during the inflation and deployment process, or the front part of the side curtain airbag may float out of the window when the window is opened, thus reducing the protective effect of the side curtain airbag.

[0051] Based on this, the embodiments of this specification propose a processing solution: such as Figures 2-3 As shown, a side curtain airbag of the present invention has an oblique direct-charge cavity 106 extending from the air guide channel 102 to the lower front end of the bag 10 on the bag 10, so that gas can directly rush into the oblique direct-charge cavity 106, causing the oblique direct-charge cavity 106 to unfold first to form a cavity structure with a certain rigidity. Finally, the gas enters the top buffer cavity 105 through the buffer air inlet 101, so that the top buffer cavity 105 unfolds after the oblique direct-charge cavity 106, and the oblique direct-charge cavity 106 with a certain rigidity swings inward into the vehicle, thereby preventing the side curtain airbag from drifting outward.

[0052] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0053] like Figures 2-7 As shown, a side curtain airbag of the present invention includes a bag 10, the bag 10 includes an air inlet 101, an air guiding channel 102 is formed in the area of ​​the bag 10 below the air inlet 101, and a pull strap 103 is provided at the front end of the bag 10.

[0054] The air inlet 101 of the bag 10 is arranged at the middle of the bag 10 and substantially corresponds to the B pillar of the automobile.

[0055] The air guide channel 102 is arranged at the middle of the bag 10 and substantially corresponds to the B pillar of the automobile.

[0056] The one end of the pull belt 103 is connected to the front end of the side curtain, and the other end is connected to the A pillar of the automobile to avoid the front end of the side curtain from floating out of the window.

[0057] The bag 10 further comprises a top cavity seam 104 and an oblique straight inflation cavity 106. The leading end of the top cavity seam 104 is connected to the top end seam of the bag 10 and extends to the front end of the bag 10 to form a top buffer cavity 105 with the top end seam of the bag 10, and the trailing end of the top cavity seam 104 forms a buffer air inlet 101 of the top buffer cavity 105 with the top end seam of the bag 10 and / or the front end seam of the bag 10. The oblique straight inflation cavity 106 is formed below the top buffer cavity 105, extends from the front end of the air guide channel 102 to the lower front end of the bag 10, and the end of the oblique straight inflation cavity 106 away from the air guide channel 102 is in communication with the top buffer cavity 105. When the bag 10 is inflated, the end of the oblique straight inflation cavity 106 away from the air guide channel 102 can abut against the inner side of the door panel after the oblique straight inflation cavity 106 is unfolded, and the top buffer cavity 105 unfolds and swings the oblique straight inflation cavity 106 towards the vehicle interior after the gas enters the top buffer cavity 105 from the oblique straight inflation cavity 106.

[0058] The front end of the bag 10 is the front end of the automobile when the side curtain is mounted on the automobile, and the rear end is the rear end of the automobile. The top end of the bag 10 is the top end of the side curtain when the side curtain is unfolded and hung in the vehicle interior, and the bottom end is the bottom end of the side curtain when the side curtain is unfolded and hung in the vehicle interior.

[0059] The leading end of the top cavity seam 104 is connected to the part of the top end seam of the bag 10 between the B pillar and the front end of the bag 10.

[0060] The top cavity seam 104 extends obliquely downward, and the trailing end of the top cavity seam 104 is close to the front end seam of the bag 10, so that the top cavity seam 104 and the top end seam of the bag 10 have a preset distance to form the top buffer cavity 105.

[0061] The inclination angles of the parts of the top cavity seam 104 can be flexibly set according to the size of the top buffer cavity 105.

[0062] The top end part of the oblique straight inflation cavity 106 is limited by the part of the top end seam of the bag 10 and the top cavity seam 104, and the bottom end part of the oblique straight inflation cavity 106 is limited by other seams to form a straight inflation cavity body obliquely downward from the air guide channel 102.

[0063] The bottom end of the oblique straight inflation cavity 106 can be flexibly set according to requirements, as long as it cooperates with the partial top end seam of the bag 10 and the top cavity seam 104 to form the oblique straight inflation cavity 106.

[0064] Since one end of the oblique straight inflation cavity 106 starts from the air guide channel 102, the oblique straight inflation cavity 106 is directly communicated with the air guide channel 102, so that the gas can quickly enter the oblique straight inflation cavity 106.

[0065] Preferably, the oblique straight inflation cavity 106 extends to the bottom end seam of the bag 10 in the longitudinal direction and extends to the front end seam of the bag 10 in the transverse direction.

[0066] More preferably, the end of the oblique straight inflation cavity 106 extends to the connection between the front end seam and the bottom end seam of the bag 10, so that the front end of the side air curtain can be completely unfolded, and the front end of the side air curtain is supported by the oblique straight inflation cavity 106.

[0067] When the end of the oblique straight inflation cavity 106 extends to the connection between the front end seam and the bottom end seam of the bag 10, the oblique straight inflation cavity 106 can support the front end part of the bag 10 in the transverse and vertical directions after unfolding, so that the front end part of the bag 10 has better rigidity as a whole, and it is also convenient to swing the front end part of the bag 10 as a whole to the inside of the vehicle after the top buffer cavity 105 is inflated, so as to avoid the front end part of the bag 10 from flying out of the window.

[0068] After the oblique straight inflation cavity 106 of the present application is filled with gas and unfolded, the gas enters the top buffer cavity 105 through the buffer air inlet 101. Since the outside of the top buffer cavity 105 is limited by the vehicle roof after unfolding, the top buffer cavity 105 will expand to the direction of the inside of the vehicle, so as to swing the oblique straight inflation cavity 106 to the inside of the vehicle, so as to avoid the front end part of the bag 10 from flying out of the window.

[0069] Further, the end of the oblique straight inflation cavity 106 away from the air guide channel 102 can abut against the door panel after inflation and unfolding, and finally under the action of the top end of the oblique straight inflation cavity 106 being abutted against by the vehicle roof, the bottom end of the oblique straight inflation cavity 106 being abutted against by the door panel and the pulling of the pull belt 103, the oblique straight inflation cavity 106 is prevented from flying out of the window or flying out of the window when being hit.

[0070] Further, as shown in Figure 3 The front end lower part of the bag 10 extends downward to form a convex cavity region 107, and the convex cavity region 107 is communicated with the end of the oblique straight inflation cavity 106 away from the air guide channel 102, so as to increase the support area of the end of the oblique straight inflation cavity 106 away from the air guide channel 102 and the inside of the door panel.

[0071] Wherein, the bottom end of the bag 10 is curved into an arc shape after connecting with the front end of the bag 10, to form a convex cavity area 107 at the lower part of the front end of the bag 10.

[0072] Wherein, the convex cavity area 107 is in a hammerhead structure after being inflated, to increase the contact area with the door panel or only make the lower part of the front end of the bag 10 resist the door panel.

[0073] By forming the convex cavity area 107 at the lower part of the front end of the bag 10, the top end of the diagonal straight inflation cavity 106 is in contact with the roof of the vehicle body to make the diagonal straight inflation cavity 106 be supported by three points, to avoid the diagonal straight inflation cavity 106 from floating out of the window.

[0074] Further, as shown in Figures 2-3 The bag 10 also includes a gas guide channel seam 108 and a first bottom seam 109. Wherein, the gas guide channel seam 108 is sewn below the air inlet 101 on the bag 10, the leading end of the gas guide channel seam 108 and the top end seam of the bag 10 form a gas guide channel 102, the trailing end of the gas guide channel 102 extends obliquely below the front end of the bag 10; the first bottom seam 109 extends from the bottom end seam of the bag 10 to the trailing end of the gas guide channel seam 108, and the end of the first bottom seam 109 and the trailing end of the gas guide channel seam 108 have a predetermined distance to form a bottom cavity 110 air inlet 101; wherein, the first bottom seam 109, the trailing end of the gas guide channel seam 108, the top end seam of the bag 10, and the top cavity seam 104 together define the diagonal straight inflation cavity 106, the first bottom seam 109 and the bottom end seam of the bag 10 form the bottom cavity 110, and the bottom cavity 110 communicates with the diagonal straight inflation cavity 106 through the bottom cavity 110 air inlet 101.

[0075] Wherein, the gas guide channel 102 is used to install a gas guide bag to guide the airflow.

[0076] Wherein, the bottom cavity 110 is used as a buffer cavity, when the diagonal straight inflation cavity 106 is fully inflated and is hit, the gas in the diagonal straight inflation cavity 106 can also enter the bottom cavity 110 to play a buffering role, to avoid the diagonal straight inflation cavity 106 being too rigid to harm the occupant.

[0077] Wherein, the predetermined distance between the end of the first bottom seam 109 and the trailing end of the gas guide channel seam 108 can be flexibly set according to actual needs.

[0078] Wherein, the tail end of the gas channeling stitch 108 is set to be inclined downward, and the first bottom stitch 109 is set to be inclined upward toward the direction of the gas channeling stitch 108, so that the tail end of the gas channeling stitch 108, the first bottom stitch 109, and the partial bottom end stitch of the capsule bag 10 jointly limit the bottom end part of the oblique straight filling cavity 106.

[0079] Wherein, in the process of gas entering the oblique straight filling cavity 106, the bottom cavity 110 is also entered at the same time, so that the bottom cavity 110 expands to turn the bottom end edge of the capsule bag 10 outward, so as to facilitate the unfolding of the capsule bag 10.

[0080] Further, as shown in Figure 3 , the capsule bag 10 also includes a second bottom stitch 111, which is located on the side of the first bottom stitch 109 close to the gas channeling stitch 108, and the second bottom stitch 111 extends from the bottom end stitch of the capsule bag 10 to the first bottom stitch 109, and cooperates with the first bottom stitch 109 and the bottom end stitch of the capsule bag 10 to form a bottom sub-cavity 112, and the second bottom stitch 111 and the first bottom stitch 109 form a bottom sub-cavity 112 gas inlet 101.

[0081] Wherein, the bottom sub-cavity 112 gas inlet 101 is used for buffering or facilitating the turning of the bottom end edge of the capsule bag 10 outward.

[0082] In some embodiments, as shown in Figure 4 , the end of the second bottom stitch 111 away from the bottom end stitch of the capsule bag 10 is located between the tail end of the gas channeling stitch 108 and the end of the first bottom stitch 109 away from the bottom end stitch of the capsule bag 10, and the second bottom stitch 111, the first bottom stitch 109, and the bottom end stitch of the capsule bag 10 form a bottom sub-cavity 112, which is communicated with the oblique straight filling cavity 106 through the bottom sub-cavity 112 gas inlet 101; wherein, the tail end of the gas channeling 102, the second bottom stitch 111, the first bottom stitch 109, the top stitch of the capsule bag 10, and / or the top cavity stitch 104 form the oblique straight filling cavity 106.

[0083] Wherein, the end of the second bottom stitch 111 extends upward to be approximately between the tail end of the gas channeling stitch 108 and the end of the first bottom stitch 109, so that the bottom sub-cavity 112 is directly communicated with the oblique straight filling cavity 106, so that the bottom sub-cavity 112 better obtains the gas in the oblique straight filling cavity 106, so as to facilitate the turning of the bottom end stitch of the capsule bag 10 outward.

[0084] Further, the oblique straight inflation cavity 106 comprises a first section 113, a second section 114 and a third section 115 formed in sequence; the first section 113 is formed between the tail end of the gas guide channel stitch line 108, the end of the second bottom stitch line 111 away from the bottom end stitch line of the bag 10 and the head end portion of the top end cavity stitch line or the top end stitch line of the partial bag 10, and is used to drive the bag 10 to unfold towards the vehicle interior when inflated; the second section 114 is formed between the end of the second bottom stitch line 111 away from the bottom end stitch line of the bag 10, the tail end portion of the top end cavity stitch line and the partial first bottom stitch line 109, and is used to make the gas enter the bottom sub-cavity 112 after inflation, so that the bottom end edge of the bag 10 is flipped out in advance; the third section 115 is formed between the other partial first bottom stitch line 109, the tail end of the top end cavity stitch line, the front end and the lower end portion stitch line of the bag 10, and is used to resist the inner side door panel of the vehicle door after inflation, and guide the airflow to the top buffer cavity 105.

[0085] Wherein, since the oblique straight inflation cavity 106 inflates the fastest, when the gas enters the second section 114, part of the gas will enter the bottom sub-cavity 112, so that the bottom sub-cavity 112 unfolds and cooperates with the oblique straight inflation cavity 106 to increase the rigidity of the lower edge of the bag 10, so as to prevent the side air curtain from drifting outwards.

[0086] Wherein, by adjusting the gas guide channel stitch line 108 and the second bottom stitch line 111, the thickness of the first section 113 is larger, the width is also wider, and the channel between the gas guide channel stitch line 108 and the second bottom stitch line 111 is reduced, avoiding the gas being quickly shunted to the non-inflated area below the gas guide channel 102, so that the oblique gas guide channel 102 is not full enough.

[0087] In some embodiments, as shown in Figure 5 the end of the second bottom stitch line 111 away from the bottom end stitch line of the bag 10 is located below the end of the first bottom stitch line 109 away from the bottom end stitch line of the bag 10, and cooperates with the first bottom stitch line 109 and the bottom end stitch line of the bag 10 to form the bottom sub-cavity 112, which is communicated with the bottom cavity 110 through the bottom sub-cavity 112 gas inlet 101; wherein, the second bottom stitch line 111, the first bottom stitch line 109, the tail end of the gas guide channel stitch line 108, the top stitch line of the bag 10 and / or the top cavity stitch line 104 form the oblique straight inflation cavity 106.

[0088] Wherein, by setting the end of the second bottom stitch line 111 below the end of the first bottom stitch line 109, and by adjusting the distance between the first bottom stitch line 109 and the tail end of the gas guide channel stitch line 108, the gas in the oblique straight inflation cavity 106 can be prevented from being quickly shunted to the bottom cavity 110 or the bottom sub-cavity 112, resulting in that the oblique straight inflation cavity 106 is not full enough.

[0089] In some of these embodiments, such as Figure 6 As shown, the first bottom suture 109 extends to connect with the tail end of the air channel suture 108, so that the gas flowing to the front end of the bag 10 quickly fills the oblique direct inflation chamber 106, increasing the inflation speed of the oblique direct inflation chamber 106 to cope with the gas generator with a small inflation volume.

[0090] In some of these embodiments, such as Figure 6 As shown, the pouch 10 also includes a floral stitch 116, which is sewn onto the pouch 10 and located within the oblique direct inflation cavity 106 to limit the inflation thickness of the oblique direct inflation cavity 106.

[0091] The floral stitching 116 can be set at the top of the pouch 10 to correspond with the interior trim of the car headliner, so as to limit the unfolded thickness of the pouch 10 and prevent the oblique direct filling cavity 106 from expanding too much and damaging the interior trim of the car headliner, such as handles and reading lights.

[0092] For example, the floral stitching 116 can be configured as a U-shaped structure or a handle-shaped structure.

[0093] In some embodiments, the pouch 10 further includes a front end suture 117, which is located on the side of the first bottom suture 109 away from the air passage 102. One end of the front end suture 117 is connected to the bottom end suture of the pouch 10, and the other end is at a predetermined distance from both the top cavity suture 104 and the front end suture 117 of the pouch 10. The front end suture 117 is used to limit the thickness of the oblique direct filling cavity 106.

[0094] In some of these embodiments, such as Figure 7 As shown, the pouch 10 also includes a central extension cavity 118 that extends downward from the center of the bottom end of the pouch 10 to protect the occupant's head in a collision event when the occupant is seated at a large recline angle.

[0095] 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.

[0096] 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, the pouch including an air inlet, an air guiding channel formed in a pouch area below the air inlet, and a pull strap at the front end of the pouch, characterized in that, The pouch also includes: The top cavity suture has its first end connected to the top suture of the pouch and extends toward the front end of the pouch to cooperate with the top suture of the pouch to form a top buffer cavity. The tail end of the top cavity suture forms a buffer air inlet of the top buffer cavity between the top suture and the front suture of the pouch. An oblique direct-inflation cavity is formed below the top buffer cavity. The oblique direct-inflation cavity extends from the front end of the air guide channel to the lower front end of the pouch, and the end of the oblique direct-inflation cavity away from the air guide channel is connected to the top buffer cavity. The oblique direct-inflation cavity extends longitudinally to the bottom seam of the pouch and transversely to the front seam of the pouch. The lower front end of the bladder extends downward to form a protruding cavity area, and the protruding cavity area is connected to the end of the oblique direct filling cavity away from the air guide channel, so as to increase the support area between the end of the oblique direct filling cavity away from the air guide channel and the inside of the door panel. The pouch also includes: An air-guiding channel seam is sewn below the air inlet on the pouch. The first end of the air-guiding channel seam forms the air-guiding channel between the top seam of the pouch and the tail end of the air-guiding channel extends obliquely downward towards the front end of the pouch. A first bottom seam extends from the bottom seam of the pouch to the tail end of the air channel seam, and the end of the first bottom seam is at a predetermined distance from the tail end of the air channel seam to form a bottom cavity air inlet. The first bottom suture, the tail end of the air channel suture, the top suture of the bladder, and the top cavity suture together define the oblique direct filling cavity. A bottom cavity is formed between the first bottom suture and the bottom end suture of the bladder. The bottom cavity is connected to the oblique direct filling cavity through the bottom cavity air inlet. The second bottom seam is located on the side of the first bottom seam near the air channel seam. The second bottom seam extends obliquely from the bottom seam of the bag to the first bottom seam and forms a bottom sub-cavity with the first bottom seam and the bottom seam of the bag. An air inlet for the bottom sub-cavity is formed between the second bottom seam and the first bottom seam. When the bag is inflated, after the oblique direct inflation chamber is expanded, its end away from the air guide channel can abut against the inside of the door panel. After the gas enters the top buffer chamber from the oblique direct inflation chamber, the top buffer chamber expands and swings the oblique direct inflation chamber into the vehicle.

2. The side curtain air vent according to claim 1, characterized in that, The end of the second bottom seam away from the bottom seam of the pouch is located between the tail end of the air channel seam and the end of the first bottom seam away from the bottom seam of the pouch, and the second bottom seam, the first bottom seam and the bottom seam of the pouch form the bottom sub-cavity, and the bottom sub-cavity is connected to the inclined direct filling cavity through the bottom sub-cavity air inlet; The oblique direct filling cavity is formed by the tail end of the air guiding channel, the second bottom suture, the first bottom suture, the top suture of the bladder, and the top cavity suture.

3. The side curtain air vent according to claim 2, characterized in that, The oblique direct filling cavity includes a first section, a second section, and a third section formed sequentially; The first section is formed between the tail end of the air channel stitch, the end of the second bottom stitch away from the bottom stitch of the bag, the beginning portion of the top cavity stitch, and part of the top stitch of the bag. The first section is used to drive the bag to unfold into the vehicle when it is inflated. The second bottom seam is formed between one end away from the bottom seam of the pouch, the tail end of the top cavity seam, and part of the first bottom seam. The second section is used to allow gas to enter the bottom sub-cavity after inflation and expansion, so that the bottom edge of the pouch will turn out in advance. Another portion forms the third section between the first bottom seam, the tail end of the top cavity seam, the front end and bottom end seam of the bladder, the third section being used to press against the inner door panel of the car door after being filled, and to guide the airflow to the top buffer cavity.

4. The side curtain airbag according to claim 1, characterized in that, The end of the second bottom seam away from the bottom seam of the pouch is located below the end of the first bottom seam away from the bottom seam of the pouch, and together with the first bottom seam and the bottom seam of the pouch, they form the bottom sub-cavity. The bottom sub-cavity is connected to the bottom cavity through the bottom sub-cavity air inlet. The second bottom suture, the first bottom suture, the tail end of the air channel suture, the top suture of the bladder, and the top cavity suture form the oblique direct filling cavity.

5. The side curtain air vent according to claim 1, characterized in that, The pouch also includes: A central extension cavity extends downward from the center of the bottom end of the bladder to protect the occupant's head in a collision event when the occupant is seated at a large recline angle.

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