Side air curtain

Abstract

The invention discloses a side air curtain which comprises a bag, the bag comprises an air inlet, an air guide channel is formed in a bag area located below the air inlet, a pull belt is arranged at the front end of the bag, and the bag further comprises a top cavity sewing thread and an oblique direct filling cavity. The head end of the top cavity sewing thread is connected with a top end sewing thread of the bag and extends towards the front end of the bag to be matched with the top end sewing thread of the bag to form a top buffer cavity, and a buffer air inlet of the top buffer cavity is formed between the tail end of the top cavity sewing thread and the top end sewing thread of the bag and / or the front end sewing thread of the bag; the oblique direct inflation cavity is formed below the top buffering cavity and extends from the front end of the air guide channel to the lower portion of the front end of the bag, and the end, away from the air guide channel, of the oblique direct inflation cavity communicates with the top buffering cavity. The front end of the side air curtain can be prevented from floating outwards from the vehicle window, and the problem that in the prior art, the air curtain is only rolled and folded, so that the air curtain interferes with the edge of the vehicle window or floats out of the vehicle window when unfolded is solved.

Description

Technical Field

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

[0002] According to the requirements of current regulations, the air curtain cannot get stuck on the B-pillar, touch the bottom edge of the window, or float out of the window when deployed. In the existing technology, the air curtain is usually Z-folded and rolled up so that the air curtain will not get stuck on the B-pillar, touch the bottom edge of the window, or float out of the window when deployed. Performing Z-folding and rolling up at the same time undoubtedly increases the difficulty of rolling up the air curtain, and places high requirements on the staff.

[0003] In the prior art, when the air curtain is purely rolled up, it not only reduces the difficulty of rolling up the air curtain, but also reduces the requirements on the staff. However, when the air curtain formed by rolling up is installed on the vehicle body, Figure 1 As shown in the figure, the folding direction is from the inside of the car to the outside of the car. Since the air curtain chamber is inflated from top to bottom, during the air curtain deployment, the top of the air curtain will be deployed to the inside of the car, but the middle and bottom of the air curtain will be turned out of the car in one direction. In addition, after the middle and lower parts of the air curtain are inflated, the middle and lower parts of the air curtain will sway, thereby increasing the possibility / risk of the air curtain floating out of the window.

[0004] At present, no effective solution has been proposed for the problem that the air curtain in the prior art is only rolled up, which causes the air curtain to interfere with the edge of the window or float out of the window when unfolded. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a side air curtain to at least solve the problem in the prior art that the air curtain is only rolled up, causing the air curtain to interfere with the edge of the window or float outside the window when unfolded.

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

[0007] An embodiment of the present invention provides a side air curtain, comprising a bag, the bag comprising an air inlet, an air guide channel formed in a bag area below the air inlet, a drawstring provided at a front end of the bag, and the bag further comprising:

[0008] A top cavity suture, wherein the head end of the top cavity suture is connected to the top suture of the bladder bag and extends toward the front end of the bladder bag to cooperate with the top suture of the bladder bag to form a top buffer cavity, and a buffer air inlet of the top buffer cavity is formed between the tail end of the top cavity suture and the top suture of the bladder bag and / or the front suture of the bladder bag;

[0009] An oblique direct filling chamber, wherein the oblique direct filling chamber is formed below the top buffer chamber, the oblique direct filling chamber extends from the front end of the air guide channel to the lower front end of the bag, and one end of the oblique direct filling chamber away from the air guide channel is connected to the top buffer chamber;

[0010] Among them, when the bag is inflated, after the oblique direct filling chamber is expanded, its end away from the air guide channel can be against the inner side of the door panel, and after the gas enters the top buffer chamber from the oblique direct filling chamber, the top buffer chamber is expanded and swings the oblique direct filling chamber toward the inside of the vehicle.

[0011] Furthermore, the lower front end of the sac 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 to increase the supporting area between the end of the oblique direct filling cavity away from the air guide channel and the inner side of the door panel.

[0012] Furthermore, the pouch further comprises:

[0013] An air guide channel suture, wherein the air guide channel suture is sewn below the air inlet on the bag, the air guide channel is formed between the head end of the air guide channel suture and the top suture of the bag, and the tail end of the air guide channel extends obliquely toward the bottom of the front end of the bag;

[0014] A first bottom suture, the first bottom suture extending from the bottom suture of the pouch toward the tail end of the air guide channel suture, and having a preset distance between the end of the first bottom suture and the tail end of the air guide channel suture to form a bottom cavity air inlet;

[0015] Among them, the first bottom suture, the tail end of the air guide channel suture, the top suture of the sac bag, and the top cavity suture jointly define the oblique direct filling cavity, and a bottom cavity is formed between the first bottom suture and the bottom end suture of the sac bag, and the bottom cavity is connected with the oblique direct filling cavity through the bottom cavity air inlet.

[0016] Furthermore, the pouch further comprises:

[0017] The second bottom stitch is located on a side of the first bottom stitch close to the air guide channel stitch, the second bottom stitch extends obliquely from the bottom end stitch of the sac bag toward the first bottom stitch, and cooperates with the first bottom stitch and the bottom end stitch of the sac bag to form a bottom sub-cavity, and a bottom sub-cavity air inlet is formed between the second bottom stitch and the first bottom stitch.

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

[0019] Wherein, the tail end of the air guide channel, the second bottom suture, the first bottom suture, the top suture of the sac and / or the top cavity suture form the oblique straight filling cavity.

[0020] Further, the oblique direct filling chamber includes a first section, a second section and a third section formed in sequence;

[0021] The first section is formed between the tail end of the air guide channel stitch, the end of the second bottom stitch away from the bottom stitch of the bag, and the head end of the top cavity stitch or part of the top stitch of the bag, and the first section is used to drive the bag to expand into the vehicle when inflated and expanded;

[0022] The second section is formed between one end of the second bottom suture away from the bottom suture of the bladder bag, the tail end of the top cavity suture, and part of the first bottom suture, and 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 bladder bag is turned out in advance;

[0023] Another part of the first bottom stitching, the tail end of the top cavity stitching, the front end of the bladder and the lower part stitching form the third section, and the third section is used to press against the inner 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 suture away from the bottom suture of the pouch is located below the end of the first bottom suture away from the bottom suture of the pouch, and cooperates with the first bottom suture and the bottom suture of the pouch to form the bottom sub-cavity, and the bottom sub-cavity is connected with the bottom cavity through the bottom sub-cavity air inlet;

[0025] Wherein, the second bottom suture, the first bottom suture, the tail end of the air guide channel suture, the pouch top suture and / or the top cavity suture form the oblique straight filling cavity.

[0026] Furthermore, the first bottom suture extends to be connected with the tail end of the air guide channel suture, so that the gas flowing to the front end of the pouch can quickly fill the oblique straight filling cavity.

[0027] Furthermore, the pouch further comprises:

[0028] A flower-shaped suture is sewn on the pouch and is located in the oblique straight filling cavity to limit the inflation thickness of the oblique straight filling cavity.

[0029] Furthermore, the pouch further comprises:

[0030] The front end suture is located on the side of the first bottom suture away from the air guide channel, and one end of the front end suture is connected to the bottom end suture of the sac bag, and the other end has a preset distance from the top cavity suture and the front end suture of the sac bag, and the front end suture is used to limit the thickness of the oblique straight filling cavity.

[0031] Furthermore, the pouch further comprises:

[0032] The middle extension cavity extends downward from the middle of the bottom end of the bladder bag and is used to protect the head of the occupant in a collision event when the occupant sits at a large tilt angle.

[0033] 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:

[0034] A side air curtain of the present invention is provided with an oblique straight filling cavity in the middle of the bag, and a top buffer cavity is formed at the top of the oblique straight filling cavity through a top cavity sewing line, so that the gas can directly enter the oblique straight filling cavity after entering the air guide channel, so that the oblique straight filling cavity can be quickly unfolded and pressed against the inner side of the vehicle door, and finally the gas inside the oblique straight filling cavity flows into the top buffer cavity through a buffer air inlet, so as to swing the unfolded oblique straight filling cavity toward the vehicle interior, so as to prevent the front end of the side air curtain from floating outward from the vehicle window, thereby solving the problem in the prior art that the air curtain is only rolled up, causing the air curtain to interfere with the edge of the vehicle window or float out of the vehicle window when unfolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

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

[0037] Figure 2 Schematic diagram of the deployment of a side air curtain of the present invention (I);

[0038] Figure 3 Schematic diagram of the deployment of a side air curtain of the present invention (II);

[0039] Figure 4 Schematic diagram of the deployment of a side air curtain of the present invention (III);

[0040] Figure 5 Schematic diagram of the deployment of a side air curtain of the present invention (IV);

[0041] Figure 6 Schematic diagram of the deployment of a side air curtain of the present invention (V);

[0042] Figure 7 Schematic diagram of the deployment of a side air curtain according to the present invention (VI).

[0043] The accompanying drawings of the present invention are as follows:

[0044] 10. Bag; 101. Air inlet; 102. Air guide channel; 103. Drawstring; 104. Top cavity suture; 105. Top buffer cavity; 106. Oblique straight filling cavity; 107. Protruding 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. Flower-shaped suture; 117. Front end suture; 118. Middle extension cavity. DETAILED DESCRIPTION

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

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Because the side air curtain is restricted by folding when it is in the pure rolled form, it will get stuck on the door during the inflation and deployment process or the front end of the side air curtain will float out of the window when the window is open, thereby reducing the protective effect of the side air curtain.

[0051] Based on this, this specification embodiment proposes a processing solution: Figures 2-3 As shown, a side air curtain of the present invention is provided with an oblique direct filling chamber 106 extending from an air guide channel 102 to the lower front end of the air curtain 10 on the bag 10, so that gas can directly rush into the oblique direct filling chamber 106, so that the oblique direct filling chamber 106 is first deployed to form a cavity structure with a certain rigidity, and finally the gas enters the top buffer chamber 105 through the buffer air inlet 101, so that the top buffer chamber 105 is deployed after the oblique direct filling chamber 106, and the oblique direct filling chamber 106 with a certain rigidity is swung toward the inside of the vehicle, so as to prevent the side air curtain from floating outward.

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

[0053] like Figures 2 to 7 As shown, a side air curtain of the present invention comprises a bag 10 , wherein the bag 10 comprises an air inlet 101 , an air guide channel 102 is formed in a region of the bag 10 below the air inlet 101 , and a drawstring 103 is provided at the front end of the bag 10 .

[0054] The air inlet 101 of the bag 10 is arranged in the middle of the bag 10 , approximately near the B-pillar of the car.

[0055] The air guide channel 102 is located in the middle of the bag 10 and is roughly arranged corresponding to the B-pillar of the automobile.

[0056] One end of the pull strap 103 is used to be connected to the front end of the side air curtain, and the other end is connected to the A-pillar of the car to prevent the front end of the side air curtain from floating out of the window.

[0057] The bag 10 also includes a top cavity suture 104 and an oblique direct filling cavity 106. The head end of the top cavity suture 104 is connected to the top suture of the bag 10, and extends to the front end of the bag 10 to cooperate with the top suture of the bag 10 to form a top buffer cavity 105, and the tail end of the top cavity suture 104 and the top suture of the bag 10 and / or the front suture 117 of the bag 10 form a buffer air inlet 101 of the top buffer cavity 105; the oblique direct filling cavity 106 is formed below the top buffer cavity 105, and the oblique direct filling cavity 106 is connected to the top suture of the bag 10 and extends to the front end of the bag 10 to cooperate with the top suture of the bag 10 to form a buffer air inlet 101 of the top buffer cavity 105; The front end of the channel 102 extends toward the lower front end of the bag 10, and the end of the oblique direct filling chamber 106 away from the air guide channel 102 is connected to the top buffer chamber 105; wherein, when the bag 10 is inflated, after the oblique direct filling chamber 106 is unfolded, its end away from the air guide channel 102 can be against the inner side of the door panel, and after the gas enters the top buffer chamber 105 from the oblique direct filling chamber 106, the top buffer chamber 105 unfolds and swings the oblique direct filling chamber 106 toward the inside of the vehicle.

[0058] The front end of the bag 10 is the front end of the car when the side air curtain is installed on the car, and the rear end is the rear end of the car. The top end of the bag 10 is the top end of the side air curtain when it is deployed and hung in the car, and the bottom end is the bottom end of the side air curtain when it is deployed and hung in the car.

[0059] The head end of the top cavity suture 104 is connected to a portion of the top suture of the bladder bag 10 that is located between the B-pillar and the front end of the bladder bag 10 .

[0060] The top cavity suture 104 extends obliquely downward, and its tail end is close to the front end suture 117 of the pouch 10 , so that there is a preset distance between the top cavity suture 104 and the top end suture of the pouch 10 to form a top buffer cavity 105 .

[0061] Among them, the inclination angles of various parts of the top cavity suture 104 can be flexibly set according to the size of the top buffer cavity 105.

[0062] The top portion of the oblique direct filling cavity 106 is limited by part of the top suture of the bag 10 and the top cavity suture 104 , and the bottom portion is limited by other sutures to form a direct filling cavity inclined downward from the air guide channel 102 .

[0063] The bottom portion of the oblique direct filling cavity 106 can be flexibly set according to the needs, as long as it cooperates with part of the top suture of the pouch 10 and the top cavity suture 104 to form the oblique direct filling cavity 106 .

[0064] Since one end of the oblique direct filling chamber 106 starts from the gas guiding channel 102 , the oblique direct filling chamber 106 is directly connected to the gas guiding channel 102 , so that the gas can quickly enter the oblique direct filling chamber 106 .

[0065] Preferably, the oblique straight filling cavity 106 extends to the bottom suture of the pouch 10 in the longitudinal direction, and extends to the front suture 117 of the pouch 10 in the transverse direction.

[0066] More preferably, the end of the oblique direct filling cavity 106 extends to the connection between the front end stitch 117 and the bottom end stitch of the bladder 10 , so that the front end of the side air curtain can be fully unfolded and supported by the oblique direct filling cavity 106 .

[0067] Among them, when the end of the oblique straight filling chamber 106 extends to the connection between the front end stitch 117 and the bottom end stitch of the bag 10, after the oblique straight filling chamber 106 is unfolded, the oblique straight filling chamber 106 can support the front end part of the bag 10 both horizontally and vertically, so that the front end part of the bag 10 as a whole has better rigidity, and it is also convenient to swing the front end part of the bag 10 as a whole into the car after the top buffer chamber 105 is inflated, so as to avoid the front end part of the bag 10 floating out of the car window.

[0068] After the oblique direct filling chamber 106 of the present application is filled with gas and unfolded, the gas enters the top buffer chamber 105 through the buffer air inlet 101. Since the top buffer chamber 105 is restricted on the outside by the vehicle body roof after unfolding, the top buffer chamber 105 will expand toward the interior of the vehicle, thereby driving the oblique direct filling chamber 106 to swing toward the interior of the vehicle to prevent the front end of the bag 10 from floating out of the window.

[0069] Furthermore, after being inflated and expanded, the end of the oblique direct charging chamber 106 away from the air guide channel 102 can come into contact with the door panel. Finally, the top of the oblique direct charging chamber 106 is supported by the roof of the vehicle body, the bottom of the oblique direct charging chamber 106 is supported by the door panel, and the pull strap 103 pulls, thereby preventing the oblique direct charging chamber 106 from floating out of the window or floating out of the window when hit.

[0070] Furthermore, if Figure 3As shown, the lower front end of the bag 10 extends downward to form a protruding cavity area 107, and the protruding cavity area 107 is connected to the end of the oblique direct filling cavity 106 away from the air guide channel 102 to increase the supporting area between the end of the oblique direct filling cavity 106 away from the air guide channel 102 and the inner side of the door panel.

[0071] The bottom end suture of the pouch 10 is bent downward into an arc shape and connected to the front end suture 117 of the pouch 10 to form a protruding cavity area 107 at the lower front end of the pouch 10 .

[0072] Among them, after the protruding cavity area 107 is unfolded and inflated, the oblique straight filling cavity 106 is overall in a hammer head shape structure to increase the contact area with the door panel or only make the front lower part of the bag 10 contact the door panel.

[0073] A protruding cavity area 107 is formed at the lower front end of the bag 10, which cooperates with the drawstring 103 and the top of the oblique direct filling cavity 106 to abut against the vehicle body roof so that the oblique direct filling cavity 106 is supported at three points to prevent the oblique direct filling cavity 106 from floating out of the window.

[0074] Furthermore, if Figures 2-3 As shown, the bag 10 also includes an air channel stitch 108 and a first bottom stitch 109. The air channel stitch 108 is sewn below the air inlet 101 on the bag 10, and an air channel 102 is formed between the head end of the air channel stitch 108 and the top stitch of the bag 10, and the tail end of the air channel 102 extends obliquely toward the bottom of the front end of the bag 10; the first bottom stitch 109 extends from the bottom stitch of the bag 10 to the tail end of the air channel stitch 108, and the end of the first bottom stitch 109 is connected to the end of the air channel stitch 108. The tail end has a preset distance to form the bottom cavity 110 air inlet 101; wherein, the first bottom stitch 109, the tail end of the air guide channel stitch 108, the top stitch of the sac bag 10, and the top cavity stitch 104 jointly define the oblique direct filling cavity 106, and the bottom cavity 110 is formed between the first bottom stitch 109 and the bottom stitch of the sac bag 10, and the bottom cavity 110 is connected to the oblique direct filling cavity 106 through the bottom cavity 110 air inlet 101.

[0075] The air guide channel 102 is used to install an air guide bag to guide the airflow.

[0076] Among them, the bottom cavity 110 is used as a buffer cavity. When the oblique direct filling cavity 106 is filled with gas and collided, the gas in the oblique direct filling cavity 106 can also enter the bottom cavity 110 to play a buffering role, thereby preventing the oblique direct filling cavity 106 from being too rigid and hurting the occupants.

[0077] The preset distance between the end of the first bottom suture 109 and the tail end of the air guide channel suture 108 can be flexibly set according to actual needs.

[0078] Among them, by tilting the tail end of the air guide channel suture 108 downward and tilting the first bottom suture 109 upward in the direction of the air guide channel suture 108, the tail end of the air guide channel suture 108, the first bottom suture 109, and part of the bottom suture of the bag 10 together limit the bottom part of the oblique straight filling chamber 106.

[0079] When the gas enters the oblique straight filling chamber 106 , it also enters the bottom chamber 110 , so that the bottom chamber 110 expands and turns the bottom edge of the bag 10 outward, so as to facilitate the bag 10 to unfold.

[0080] Furthermore, if Figure 3 As shown, the pouch 10 also includes a second bottom stitch 111, which is located on the side of the first bottom stitch 109 close to the air guide channel stitch 108, and the second bottom stitch 111 extends obliquely from the bottom end stitch of the pouch 10 toward the first bottom stitch 109, and cooperates with the first bottom stitch 109 and the bottom end stitch of the pouch 10 to form a bottom sub-cavity 112, and a bottom sub-cavity 112 air inlet 101 is formed between the second bottom stitch 111 and the first bottom stitch 109.

[0081] The air inlet 101 of the bottom sub-cavity 112 is used to play a buffering role or to facilitate turning the bottom edge of the bag 10 outward.

[0082] In some of the embodiments, Figure 4 As shown, the end of the second bottom stitch 111 away from the bottom stitch of the bag 10 is located between the tail end of the air guide channel stitch 108 and the end of the first bottom stitch 109 away from the bottom stitch of the bag 10, and the second bottom stitch 111, the first bottom stitch 109 and the bottom stitch of the bag 10 form a bottom sub-cavity 112, and the bottom sub-cavity 112 is connected to the oblique direct filling cavity 106 through the bottom sub-cavity 112 air inlet 101; wherein, the tail end of the air guide channel 102, the second bottom stitch 111, the first bottom stitch 109, the top stitch of the bag 10 and / or the top cavity stitch 104 form the oblique direct filling cavity 106.

[0083] Among them, the end of the second bottom stitch 111 extends upward to be roughly located between the tail end of the air guide channel stitch 108 and the end of the first bottom stitch 109, so that the bottom sub-cavity 112 is directly connected to the oblique direct filling cavity 106, so that the bottom sub-cavity 112 can better obtain the gas in the oblique direct filling cavity 106, so that the bottom stitch of the bag 10 can be turned outward.

[0084] Furthermore, the oblique straight filling cavity 106 includes 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 air guide channel stitch 108, the end of the second bottom stitch 111 away from the bottom stitch of the bag 10, and the head end part of the top cavity stitch or part of the top stitch of the bag 10, and the first section 113 is used to drive the bag 10 to expand into the vehicle when inflated and expanded; the second bottom stitch 111 away from the bottom stitch of the bag 10, the top cavity stitch A second section 114 is formed between the tail end portion of the body stitching and part of the first bottom stitching 109. The second section 114 is used to allow gas to enter the bottom sub-cavity 112 after inflation and expansion, so that the bottom edge of the bag 10 is turned out in advance; a third section 115 is formed between the other part of the first bottom stitching 109, the tail end of the top cavity stitching, the front end of the bag 10 and the lower part of the stitching. The third section 115 is used to resist the inner door panel of the vehicle door after being filled and guide the airflow to the top buffer cavity 105.

[0085] Among them, since the oblique straight filling chamber 106 inflates the fastest, when the gas enters the second section 114, part of the gas will enter the bottom sub-cavity 112, causing the bottom sub-cavity 112 to expand and cooperate with the oblique straight filling chamber 106 to increase the rigidity of the lower edge of the bag 10 to prevent the side air curtain from floating outward.

[0086] Among them, by adjusting the air guide channel stitching 108 and the second bottom stitching 111, the thickness of the first section 113 is larger and the width is also wider, and the channel between the air guide channel stitching 108 and the second bottom stitching 111 is reduced to prevent the gas from being quickly diverted to the non-inflated area under the air guide channel 102, making the oblique air guide channel 102 not full enough.

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

[0088] Among them, by setting the end of the second bottom stitch 111 below the end of the first bottom stitch 109 and by adjusting the distance between the first bottom stitch 109 and the tail end of the air guide channel stitch 108, it is possible to avoid the gas in the oblique direct filling chamber 106 being quickly diverted to the bottom cavity 110 or the bottom sub-cavity 112, causing the oblique direct filling chamber 106 to be insufficiently full.

[0089] In some of the embodiments, Figure 6 As shown, the first bottom stitch 109 extends to connect with the tail end of the air guide channel stitch 108, so that the gas flowing to the front end of the bag 10 can quickly fill the oblique direct filling chamber 106, increasing the inflation speed of the oblique direct filling chamber 106 to cope with the gas generator with a smaller inflation volume.

[0090] In some of the embodiments, Figure 6 As shown, the pouch 10 further includes a patterned suture 116 , which is sewn on the pouch 10 and is located in the oblique straight filling chamber 106 to limit the inflation thickness of the oblique straight filling chamber 106 .

[0091] Among them, the flower-shaped stitching 116 can be set at the top of the bag 10 to correspond to the car ceiling interior to limit the unfolded thickness of the bag 10 and prevent the oblique straight filling chamber 106 from expanding too much and damaging the car ceiling interior, such as handles, reading lights, etc.

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

[0093] In some of the embodiments, the bag 10 also includes a front end stitch 117, which is located on the side of the first bottom stitch 109 away from the air guide channel 102, and one end of the front end stitch is connected to the bottom stitch of the bag 10, and the other end has a preset distance from the top cavity stitch 104 and the front end stitch 117 of the bag 10. The front end stitch 117 is used to limit the thickness of the oblique straight filling cavity 106.

[0094] In some of the embodiments, Figure 7 As shown, the bladder bag 10 further includes a middle extension cavity 118 extending downward from the middle of the bottom end of the bladder bag 10 for protecting the occupant's head in a collision event when the occupant sits at a large tilt angle.

[0095] 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.

[0096] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A side air curtain, comprising a bag, the bag comprising an air inlet, an air guide channel formed in a bag area below the air inlet, a drawstring provided at a front end of the bag, characterized in that: The pouch further comprises: A top cavity suture, wherein the head end of the top cavity suture is connected to the top suture of the bladder bag and extends toward the front end of the bladder bag to cooperate with the top suture of the bladder bag to form a top buffer cavity, and a buffer air inlet of the top buffer cavity is formed between the tail end of the top cavity suture and the top suture of the bladder bag and / or the front suture of the bladder bag; An oblique direct filling chamber, wherein the oblique direct filling chamber is formed below the top buffer chamber, the oblique direct filling chamber extends from the front end of the air guide channel to the lower front end of the bag, and one end of the oblique direct filling chamber away from the air guide channel is connected to the top buffer chamber; Among them, when the bag is inflated, after the oblique direct filling chamber is expanded, its end away from the air guide channel can be against the inner side of the door panel, and after the gas enters the top buffer chamber from the oblique direct filling chamber, the top buffer chamber is expanded and swings the oblique direct filling chamber toward the inside of the vehicle.

2. The side curtain airbag according to claim 1, characterized in that: The lower front end of the bag 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 to increase the supporting area between the end of the oblique direct filling cavity away from the air guide channel and the inner side of the vehicle door panel.

3. The side curtain airbag according to claim 2, characterized in that: The pouch further comprises: An air guide channel suture, wherein the air guide channel suture is sewn below the air inlet on the bag, the air guide channel is formed between the head end of the air guide channel suture and the top suture of the bag, and the tail end of the air guide channel extends obliquely toward the bottom of the front end of the bag; A first bottom suture, the first bottom suture extending from the bottom suture of the pouch toward the tail end of the air guide channel suture, and having a preset distance between the end of the first bottom suture and the tail end of the air guide channel suture to form a bottom cavity air inlet; Among them, the first bottom suture, the tail end of the air guide channel suture, the top suture of the sac bag, and the top cavity suture jointly define the oblique direct filling cavity, and a bottom cavity is formed between the first bottom suture and the bottom end suture of the sac bag, and the bottom cavity is connected with the oblique direct filling cavity through the bottom cavity air inlet.

4. The side curtain airbag according to claim 3, characterized in that: The pouch further comprises: The second bottom stitch is located on a side of the first bottom stitch close to the air guide channel stitch, the second bottom stitch extends obliquely from the bottom end stitch of the sac bag toward the first bottom stitch, and cooperates with the first bottom stitch and the bottom end stitch of the sac bag to form a bottom sub-cavity, and a bottom sub-cavity air inlet is formed between the second bottom stitch and the first bottom stitch.

5. The side curtain airbag according to claim 4, characterized in that: The end of the second bottom suture away from the bottom suture of the bladder bag is located between the tail end of the air guide channel suture and the end of the first bottom suture away from the bottom suture of the bladder bag, and the second bottom suture, the first bottom suture and the bottom suture of the bladder bag form the bottom sub-cavity, and the bottom sub-cavity is connected with the oblique straight filling cavity through the bottom sub-cavity air inlet; Wherein, the tail end of the air guiding channel, the second bottom suture, the first bottom suture, the top suture of the pouch and / or the top cavity suture form the oblique straight filling cavity.

6. The side curtain airbag according to claim 5, characterized in that: The oblique direct filling chamber includes a first section, a second section and a third section which are formed in sequence; The first section is formed between the tail end of the air guide channel stitch, the end of the second bottom stitch away from the bottom stitch of the bag, and the head end of the top cavity stitch or part of the top stitch of the bag, and the first section is used to drive the bag to expand into the vehicle when inflated and expanded; The second section is formed between one end of the second bottom suture away from the bottom suture of the bladder bag, the tail end of the top cavity suture, and part of the first bottom suture, and 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 bladder bag is turned out in advance; Another part of the first bottom stitching, the tail end of the top cavity stitching, the front end of the bladder and the lower part stitching form the third section, and the third section is used to press against the inner door panel of the vehicle door after being filled and guide the airflow to the top buffer cavity.

7. The side curtain airbag according to claim 4, characterized in that: The end of the second bottom suture away from the bottom suture of the pouch is located below the end of the first bottom suture away from the bottom suture of the pouch, and cooperates with the first bottom suture and the bottom suture of the pouch to form the bottom sub-cavity, and the bottom sub-cavity is connected to the bottom cavity through the bottom sub-cavity air inlet; Wherein, the second bottom suture, the first bottom suture, the tail end of the air guide channel suture, the pouch top suture and / or the top cavity suture form the oblique straight filling cavity.

8. The side curtain airbag according to claim 3, characterized in that: The first bottom suture extends to connect with the tail end of the air guide channel suture, so that the gas flowing to the front end of the pouch can quickly fill the oblique direct filling cavity.

9. The side curtain airbag according to claim 8, characterized in that: The pouch further comprises: A flower-shaped suture, wherein the flower-shaped suture is sewn on the pouch and is located in the oblique straight-filling cavity to limit the inflation thickness of the oblique straight-filling cavity; or The pouch further comprises: The front end suture is located on the side of the first bottom suture away from the air guide channel, and one end of the front end suture is connected to the bottom end suture of the sac bag, and the other end has a preset distance from the top cavity suture and the front end suture of the sac bag, and the front end suture is used to limit the thickness of the oblique straight filling cavity.

10. The side curtain airbag according to claim 1, characterized in that: The pouch further comprises: The middle extension cavity extends downward from the middle of the bottom end of the bladder bag and is used to protect the head of the occupant in a collision event when the occupant sits at a large tilt angle.

Images