Side air curtain without drawstring

Abstract

The utility model discloses a drawstring-free side air curtain which comprises a bag, a supporting cavity is formed at the front end of the bag, the supporting cavity inclines or vertically extends from the upper portion of the bag to the lower portion of the bag, an air inlet channel of the supporting cavity is arranged towards an air inlet of the bag, and the bag further comprises a sewing portion. The suture part is arranged between the supporting cavity and the vertical suture at the front end of the bag, the suture part is bent into a bent structure with an opening in one side so that a jumping cavity can be formed in the bag, and the suture part and the edge suture of the bag are arranged at intervals so that a cavity air channel of the jumping cavity can be formed between the suture part and the bag. According to the side air curtain, the front end of the side air curtain can be prevented from floating outwards or being clamped on the car window without using a drawstring, and the problem that the front end of the side air curtain can be prevented from floating outwards only by using the drawstring in the existing side air curtain is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety airbags, in particular to a side air curtain without a drawstring. Background Art

[0002] With the rapid development of the automotive industry, the automotive passive safety sector is becoming increasingly mature and competitive. The airbag industry is also facing increasingly stringent requirements for performance, cost, and manufacturability. Therefore, while ensuring high performance, low BOM costs, and manufacturability, continuous improvement of side curtain airbags is necessary to gain a competitive advantage.

[0003] The front end of existing side air curtains is generally connected to the A-pillar of the car through a drawstring, so that when the side air curtain is deployed, the drawstring is used to pull the front end of the side air curtain to prevent the front end of the side air curtain from floating out of the window. However, using the drawstring to pull the side air curtain not only increases the difficulty of assembling and installing the side air curtain, but also increases the production cost of the side air curtain.

[0004] Based on this, a new technical solution is needed. Utility Model Content

[0005] In view of this, an embodiment of the present invention provides a side curtain airbag without a drawstring, so as to at least solve the problem that the existing side curtain airbag needs to use a drawstring to prevent the front end of the side curtain airbag from floating outward.

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

[0007] The present invention provides a strapless side curtain airbag, comprising a bag, a support cavity formed at a front end of the bag, the support cavity extending obliquely from the upper side of the bag to the lower side of the bag, an air inlet passage of the support cavity being arranged toward an air inlet of the bag, and the bag further comprising:

[0008] A suture portion, the suture portion being disposed between the support cavity and the front vertical suture of the pouch, the suture portion being bent into a curved structure with an opening on one side to form a skip cavity on the pouch, and the suture portion being spaced apart from the edge suture of the pouch to form a cavity airway of the skip cavity between the suture portion and the pouch;

[0009] Wherein, at least part of the support cavity is located below the jump cavity, and the opening faces the lower side of the front end vertical suture of the pouch and / or the front lower end transverse suture of the pouch.

[0010] Furthermore, the suture portion has an inverted N-shaped structure, and the suture portion is tilted downward toward the front end of the pouch as a whole, so that the opening of the jump cavity is toward the connection between the vertical suture at the front end of the pouch and the horizontal suture at the front lower end of the pouch.

[0011] Furthermore, the first end of the suture portion extends to be connected to the transverse suture at the front lower end of the pouch, and the cavity airway is formed between the second end of the suture portion and the front end vertical suture of the pouch.

[0012] Furthermore, the top end of the suture portion is located on a side of the horizontal midline of the pouch close to the bottom end of the pouch.

[0013] Furthermore, the second end of the suture portion is bent toward the direction where the first end of the suture portion is located to form a spiral structure.

[0014] Furthermore, the end portion of the second end of the suture portion is arranged toward the front end vertical suture of the pouch or the front lower end transverse suture of the pouch.

[0015] Furthermore, there are at least two suture parts, which are arranged in parallel.

[0016] Furthermore, the size of the cavity airway is smaller than the size of the air inlet airway of the support cavity.

[0017] Furthermore, at least a portion of the top end of the suture portion is located above the air inlet passage of the support cavity, so as to guide the gas to preferentially enter the support cavity.

[0018] Furthermore, the pouch further comprises:

[0019] The supporting cavity suture is arranged opposite to the suture portion, and the supporting cavity suture extends obliquely from the top of the sac to the bottom of the sac, and cooperates with the suture portion to jointly limit the supporting cavity.

[0020] 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:

[0021] The utility model provides a side curtain airbag without a drawstring. After the gas enters the support cavity through the air inlet of the bag, the support cavity can be quickly deployed and pressed against the inner door panel of the vehicle door. If the front end of the side curtain airbag floats outward, the gas will flow toward the front end of the bag and then return to impact the stitching portion, so that the stitching portion drives the jump cavity to jump upward. When the jump cavity jumps, since the support cavity and the jump cavity share a part of the stitching portion, and since the support cavity has a tendency to keep the stitching portion straight, when the jump cavity jumps, the support cavity can pull the jump cavity back into the vehicle through the stitching portion, thereby preventing the side curtain airbag from floating outward in the case of no drawstring.

[0022] Furthermore, after the jump cavity floats outward, the bladder cloth piece on the side of the jump cavity close to the interior of the vehicle tilts from the inside of the vehicle to the outside of the vehicle. Therefore, after the gas enters the jump cavity, the bladder cloth piece on the side of the jump cavity close to the interior of the vehicle is subjected to more gas impact, thereby causing the jump cavity to jump toward the interior of the vehicle when the jump cavity jumps, thereby preventing the side air curtain from floating outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0024] Figure 1 This is a first embodiment of a side curtain airbag without a drawstring according to the present invention;

[0025] Figure 2 This is a second embodiment of a side curtain airbag without a drawstring of the present invention;

[0026] Figure 3 This is a third embodiment of a side curtain airbag without a drawstring of the present invention;

[0027] Figure 4 This is a fourth embodiment of a side air curtain without a drawstring according to the present invention.

[0028] The accompanying drawings of the present invention are as follows:

[0029] 10. Pouch; 11. Support cavity; 12. Suture part; 13. Jump cavity; 14. Cavity airway; 15. Support cavity suture. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0031] The following describes the embodiments 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 embodiments, 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 features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0032] 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 this 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 an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0033] 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 illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0034] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0035] With the rapid development of the automotive industry, the automotive passive safety sector is becoming increasingly mature and competitive. The airbag industry is placing ever-higher demands on performance, cost, and manufacturability. Only through continuous design innovation can a competitive advantage be achieved while ensuring high performance, low BOM costs, and manufacturability.

[0036] During static deployment and full-vehicle collisions, side curtain airbags can collide with door panels and float out of windows during deployment. Current technology involves adding a pull strap to the front of the CAB airbag to control its deployment and prevent it from floating outward. This not only increases production costs but also makes installation more difficult.

[0037] Based on this, this specification proposes a solution: Figures 1 to 4 As shown, the utility model is a strapless side air curtain, which forms a support cavity 11 at the front end of the bag 10, and then forms a stitching portion 12 and a jumping cavity 13 between the support cavity 11 and the vertical stitching at the front end of the bag 10, and at least a portion of the support cavity 11 is tilted below the jumping cavity 13, so that after the bag 10 is inflated to make the support cavity 11 unfold and the jumping cavity 13 float outward, the bottom end of the support cavity 11 supports the inner door panel of the vehicle door while giving the jumping cavity 13 a pulling force toward the vehicle, and finally when the gas enters the jumping cavity 13 and impacts the stitching portion 12 to make the jumping cavity 13 jump, the outward-floating jumping cavity 13 can be pulled back.

[0038] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0039] like Figures 1 to 4 As shown, a strapless side air curtain of the present invention includes a bag 10, a support cavity 11 is formed at the front end of the bag 10, the support cavity 11 extends vertically or obliquely from the upper side of the bag 10 to the lower side of the bag 10, and the air inlet duct of the support cavity 11 is arranged toward the air inlet port of the bag 10.

[0040] The support cavity 11 is used to protect the occupant's head in a collision event.

[0041] The support cavity 11 is located at a distance of 1 / 4 from the front end of the bladder bag 10 , so that when the gas generator is working, the airflow will be directed into the support cavity 11 immediately.

[0042] In some embodiments, an air guide channel is provided at the bottom of the air inlet of the pouch 10 , and the air inlet of the support cavity 11 is connected to the air guide channel to facilitate rapid expansion of the support cavity 11 .

[0043] Furthermore, there may be multiple supporting cavities 11 , which are arranged in parallel.

[0044] Preferably, the supporting cavity 11 is arranged at an angle.

[0045] After the support cavity 11 is unfolded, the bottom end of the support cavity 11 abuts against the inner door panel of the vehicle door to prevent the side air curtain from floating outward.

[0046] Furthermore, the pouch 10 also includes a suture portion 12, which is arranged between the support cavity 11 and the front end vertical suture of the pouch 10. The suture portion 12 is bent into a curved structure with an opening on one side to form a jump cavity 13 on the pouch 10, and the suture portion 12 is spaced apart from the edge suture of the pouch 10 to form a cavity airway 14 of the jump cavity 13 between the suture portion 12 and the pouch 10; wherein, at least part of the support cavity 11 is located below the jump cavity 13, and the opening is facing the lower side of the front end vertical suture of the pouch 10 and / or the front lower end transverse suture of the pouch 10.

[0047] The supporting cavity 11 and the jumping cavity 13 share a portion of the suture portion 12 .

[0048] Among them, by setting the suture part 12 as a curved structure and cooperating with the front end suture of the bag 10 to form a jumping cavity 13, when the gas flows to the front end of the bag 10 and returns to the suture part 12, it can impact the suture part 12, thereby causing the jumping cavity 13 to jump upward.

[0049] For example, the stitching portion 12 may have an inverted V-shaped structure, an inverted N-shaped structure, or the like.

[0050] The suture portion 12 can also control the thickness of the front end of the pouch 10 and the direction of the airflow, and the curved structure formed by the suture portion 12 has a certain depth and size to increase the area of ​​gas impact.

[0051] The cavity air channel 14 formed between the suture portion 12 and the pouch 10 is used to guide the gas into the jump cavity 13 . The size of the cavity air channel 14 can determine the flow rate and flow velocity of the gas entering the jump cavity 13 .

[0052] Among them, by arranging at least a part of the support cavity 11 below the jumping cavity 13, after the support cavity 11 is fully expanded, if the jumping cavity 13 floats outward during the expansion process, since the support cavity 11 has strong support and is at least partially tilted below the jumping cavity 13, the part of the support cavity 11 below the jumping cavity 13 has a tendency to pull the jumping cavity 13 into the vehicle through the stitching portion 12, so that when the jumping cavity 13 jumps upward, the jumping cavity 13 jumps into the vehicle under the pulling tendency of the support cavity 11.

[0053] Specifically, when the bag 10 is inflated, the gas flows to the support cavity 11 and the front end of the bag 10 through the air guide channel on the bag 10. The gas flowing to the support cavity 11 can make the support cavity 11 expand quickly and make the support cavity 11 support the inner door panel of the vehicle door. The gas flowing to the front end of the bag 10 enters the jump cavity 13 through the cavity gas after flowing to the front end of the bag 10, and returns to impact the stitching part 12, causing the jump cavity 13 to jump. At this time, since the support cavity 11 is tilted and located below the jump cavity 13, the support cavity 11 will give the jump cavity 13 a force to move into the vehicle when performing strong support, thereby pulling the jump cavity 13 to jump into the vehicle when the jump cavity 13 jumps.

[0054] The utility model uses the support cavity 11 as a strong support for the front end of the side air curtain, and is at least partially inclined below the jumping cavity 13. Therefore, after the jumping cavity 13 floats outward, the support cavity 11 has a tendency to move the jumping cavity 13 toward the vehicle in both the horizontal and vertical directions, and finally pulls the jumping cavity 13 to jump toward the vehicle after the jumping cavity 13 jumps.

[0055] In some embodiments, the suture portion 12 has an inverted N-shaped structure, and the suture portion 12 is tilted downward toward the front end of the pouch 10 as a whole, so that the opening of the jump cavity 13 is toward the connection between the vertical suture at the front end of the pouch 10 and the horizontal suture at the front lower end of the pouch 10.

[0056] When the stitching portion 12 is configured as an inverted n-shaped structure, both ends of the stitching portion 12 are configured to tilt outwards to increase the opening area of ​​the stitching portion 12 .

[0057] Preferably, the connection between the front vertical suture of the pouch 10 and the front lower transverse suture of the pouch 10 is configured as an arc-shaped structure to facilitate gas return.

[0058] Among them, by directing the opening of the jumping chamber 13 toward the connection between the front vertical stitching of the bag 10 and the front lower horizontal stitching of the bag 10, after the gas flows through the arc structure at the connection between the front vertical stitching of the bag 10 and the front lower horizontal stitching of the bag 10, it can smoothly turn back and impact the stitching part 12, so that the stitching part 12 drives the jumping chamber 13 to jump.

[0059] Furthermore, the first end of the suture portion 12 extends obliquely to connect with the horizontal suture at the front lower end of the pouch 10 , and a cavity airway 14 is formed between the second end of the suture portion 12 and the front vertical suture of the pouch 10 .

[0060] Among them, by extending the first end of the suture portion 12 to connect with the transverse suture at the front lower end of the bag 10, the gas reflected at the end of the bag 10 can be completely retained in the jump cavity 13, and since the first end of the suture portion 12 is inclined, it can also guide the gas to flow to the upper end of the suture portion 12 to impact the upper end of the suture portion 12, causing the suture portion 12 to jump.

[0061] Among them, since the first section of the stitching portion 12 is arranged at an angle, the portion of the support cavity 11 close to the jump cavity 13 can also form an inclined structure, so that the support cavity 11 can pull the jump cavity 13 to float into the vehicle.

[0062] Among them, by extending the first end of the suture portion 12 to connect with the horizontal suture at the front lower end of the sac 10, the gas in the support cavity 11 can be prevented from entering the jump cavity 13, so that the gas entering the support cavity 11 collides with the gas reflected from the end of the sac 10, resulting in a decrease in the total kinetic energy of the gas, thereby reducing the jumping ability of the jump cavity 13.

[0063] In some of the embodiments, the top of the suture portion 12 is located on the side of the horizontal midline of the pouch 10 close to the bottom of the pouch 10 to reduce the flow length of the gas, avoid the gas flowing too long a distance, reduce the kinetic energy, and cause the jumping ability of the jump chamber 13 to decrease.

[0064] In some of the embodiments, the second end of the suture portion 12 is bent toward the direction of the first end of the suture portion 12 to form a spiral structure, so that the jump cavity 13 has a spiral structure, and at the same time, the gas is guided to hit the suture portion 12 multiple times, so that the jump cavity 13 jumps multiple times, so that the jump cavity 13 jumps to the correct position.

[0065] Preferably, the end of the second end of the suture portion 12 is arranged toward the front end vertical suture of the bag 10 or the front lower end horizontal suture of the bag 10, so that after the gas flows to the deepest part of the spiral structure, it can still impact the suture portion 12, so that the jumping chamber 13 has the power to jump upward.

[0066] In some embodiments, there are at least two suture portions 12 arranged in parallel, and the two suture portions 12 are sewn in the same manner to increase the area of ​​the suture portion 12 impacted by the gas, thereby facilitating the jumping of the jumping cavity 13 .

[0067] For example, when there are two suture portions 12 , the two suture portions 12 may form an M-shaped structure.

[0068] Furthermore, the size of the cavity air passage 14 is smaller than the size of the air inlet passage of the support cavity 11 , so that gas can enter the support cavity 11 in large quantities first, causing the support cavity 11 to be deployed first.

[0069] Furthermore, at least a portion of the top end of the suture portion 12 is located above the air inlet passage of the support cavity 11 to guide the gas to enter the support cavity 11 first, so that the support cavity 11 can be deployed first to form a strong support.

[0070] Furthermore, the pouch 10 also includes a supporting cavity suture 15 , which is arranged opposite to the suture portion 12 . The supporting cavity suture 15 extends obliquely from the top of the pouch 10 to the bottom of the pouch 10 , and cooperates with the suture portion 12 to jointly limit the supporting cavity 11 .

[0071] The strapless side air curtain of the present invention forms a jumping cavity 13 by designing an inverted V or N-shaped stitching portion 12, and forms sufficient limiting support between the supporting portion and the door interior in the initial stage of the operation of the side air curtain to ensure that when the side air curtain is working, when severe postures such as the side air curtain hitting the door panel or floating out of the window occur, the jumping cavity 13 floating outward can be pulled back into the car through the design of the supporting cavity 11 and the jumping cavity 13 itself.

[0072] In this specification, references to the same or similar parts between the various embodiments can be made to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0073] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A strapless side curtain airbag, comprising a bladder, characterized in that: A support cavity is formed at the front end of the pouch, and the support cavity extends obliquely or vertically from the upper side of the pouch to the lower side of the pouch, and an air inlet passage of the support cavity is arranged toward the air inlet of the pouch. The pouch further includes: A suture portion, the suture portion being disposed between the support cavity and the front vertical suture of the pouch, the suture portion being bent into a curved structure with an opening on one side to form a skip cavity on the pouch, and the suture portion being spaced apart from the edge suture of the pouch to form a cavity airway of the skip cavity between the suture portion and the pouch; Wherein, when the support cavity is tilted, at least part of the support cavity is located below the jump cavity, and the opening faces the lower side of the front vertical suture of the pouch and / or the front lower end transverse suture of the pouch.

2. The strapless side curtain airbag according to claim 1, characterized in that: The suture portion has an inverted N-shaped structure, and the suture portion is tilted downward toward the front end of the pouch as a whole, so that the opening of the jump cavity faces the connection between the front end vertical suture of the pouch and the front lower end horizontal suture of the pouch.

3. The strapless side curtain airbag according to claim 2, characterized in that: The first end of the suture portion extends to be connected to the horizontal suture at the front lower end of the pouch, and the cavity airway is formed between the second end of the suture portion and the vertical suture at the front end of the pouch.

4. The strapless side curtain airbag according to any one of claims 2 to 3, characterized in that: The top end of the suture portion is located on a side of the horizontal midline of the pouch close to the bottom end of the pouch.

5. The strapless side curtain airbag according to claim 3, characterized in that: The second end of the suture portion is bent toward the direction where the first end of the suture portion is located to form a spiral structure.

6. The strapless side curtain airbag according to claim 5, characterized in that: The end portion of the second end of the suture portion is arranged toward the front end vertical suture of the pouch or the front lower end transverse suture of the pouch.

7. The strapless side curtain airbag according to claim 2, characterized in that: There are at least two suture parts, which are arranged in parallel.

8. The strapless side curtain airbag according to claim 7, characterized in that: The size of the cavity airway is smaller than the size of the air inlet airway of the support cavity.

9. The strapless side curtain airbag according to any one of claims 2 to 3, 5 to 8, characterized in that: At least a portion of the top end of the suture portion is located above the air inlet passage of the support cavity, so as to guide the gas to preferentially enter the support cavity.

10. The strapless side curtain airbag according to claim 1, characterized in that: The pouch further comprises: The supporting cavity suture is arranged opposite to the suture portion, and the supporting cavity suture extends obliquely from the top of the sac to the bottom of the sac, and cooperates with the suture portion to jointly limit the supporting cavity.

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