Air curtain structure and safety air curtain

Abstract

The application discloses an air curtain structure and a safety air curtain, and relates to the technical field of air curtain structures. The air curtain structure comprises an air curtain body, a bottom end seam of the air curtain body forms a lower protruding part, a middle part seam is arranged on one side of the lower protruding part close to a front end of the air curtain body, and the air curtain body comprises a flow guide seam and a buffer seam. The flow guide seam comprises a first longitudinal seam and a first transverse seam, the first longitudinal seam extends from the bottom end seam of the lower protruding part to a top end seam of the air curtain body, the first longitudinal seam and the middle part seam form a first protection cavity, and the first transverse seam extends from one end of the first longitudinal seam close to the top end seam of the air curtain body to a rear end of the air curtain body. The buffer seam is sewn on the air curtain body and is arranged on one side of the flow guide seam close to a rear end seam of the air curtain body, and the buffer seam and the first transverse seam jointly define a second protection cavity at the rear end of the air curtain body. The first protection cavity and the second protection cavity can be rapidly unfolded, and the problem that air curtain instability is caused by multi-channel air inlet in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of airbag, in particular to an air curtain structure and a safety air curtain. BACKGROUND

[0002] As shown in Figure 1 , the rear end of the side air curtain is usually designed with multiple longitudinal channels, which are sequentially inflated and unfolded to provide protection for the occupant. As shown in Figure 2 , to deal with small offset collision (driver or passenger side frontal 25% offset collision test), the lower edge of the rear end of the existing side air curtain is usually provided with a transverse channel (such as a V-shaped channel or a U-shaped channel) for further protection of the occupant.

[0003] In the prior art, when multiple longitudinal channels are provided at the rear end of the side air curtain, the multi-channel design of the air inlet can easily lead to a decrease in stability when the air curtain is unfolded, thereby affecting the coverage and design of the protection area. At the same time, after the transverse channel is provided at the rear end of the side air curtain, since the transverse channel is located at the bottom, its inflation and unfolding speed is slow, and it is difficult to provide sufficient protection for the occupant in a small offset collision.

[0004] Therefore, there is a need for a new technical solution. SUMMARY

[0005] Therefore, the embodiments of the present application provide an air curtain structure and a safety air curtain to at least solve the problems of the existing air curtain multi-channel air inlet leading to a decrease in stability and the transverse channel of the side air curtain unfolding slowly and being insufficient in rigidity.

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

[0007] The embodiments of the present application provide an air curtain structure, which comprises an air curtain body, the bottom end of the air curtain body is curved outward to form a lower convex part, a longitudinal middle seam is arranged on one side of the front end of the lower convex part, and the air curtain body comprises:

[0008] A flow guide seam is sewn on the air curtain body and comprises a first longitudinal seam and a first transverse seam, the first longitudinal seam extends from the bottom end seam of the lower convex part to the top end seam of the air curtain body, the first longitudinal seam and the middle seam form a first protection cavity, and the first transverse seam extends from one end of the first longitudinal seam close to the top end seam of the air curtain body to the rear end of the air curtain body.

[0009] A buffer stitch is sewn on the air curtain body and located on the side of the guide stitch close to the rear end stitch of the air curtain body. A buffer cavity with a buffer air inlet is formed between the buffer stitch and the guide stitch. The buffer stitch and the first horizontal stitch jointly define a second protection cavity at the rear end of the air curtain body.

[0010] Further, the connection of the first longitudinal stitch and the first horizontal stitch is located in the air inlet direction of the air inlet of the air curtain body. The first longitudinal stitch is used to guide the air flow to the first protection cavity, and the first horizontal stitch is used to guide the air flow to the second protection cavity.

[0011] Further, the end of the first horizontal stitch away from the first longitudinal stitch is curved towards the bottom end stitch of the air curtain body to guide the air flow to the bottom end stitch of the air curtain body.

[0012] Further, the extension trend of the buffer stitch is the same as that of the guide stitch, and the buffer stitch comprises a second horizontal stitch and a second longitudinal stitch.

[0013] The second longitudinal stitch extends from the bottom end stitch of the lower protrusion to the first horizontal stitch, and the second horizontal stitch extends from the end of the second longitudinal stitch to the first horizontal stitch close to the rear end stitch of the air curtain body.

[0014] Further, after the end of the first horizontal stitch away from the first longitudinal stitch is curved towards the bottom end stitch of the air curtain body, the first horizontal stitch extends in the direction of the second horizontal stitch to form the buffer air inlet between the first horizontal stitch and the second horizontal stitch, and the buffer air inlet is arranged towards the bottom end stitch of the air curtain body.

[0015] Further, a pattern stitch is also included, which extends from the rear end stitch of the air curtain body into the second protection cavity to define the thickness of the second protection cavity.

[0016] Further, the pattern stitch extends obliquely upwards from the rear end stitch of the air curtain body and close to the first horizontal stitch.

[0017] The part of the second protection cavity between the pattern stitch and the first horizontal stitch forms a longitudinal cavity to accommodate the head of the occupant.

[0018] Further, the first longitudinal stitch is arranged obliquely, so that the first protection cavity is defined as a longitudinal cavity with an oblique angle to facilitate the first protection cavity to drive the buffer cavity to expand in the horizontal and longitudinal directions.

[0019] Further, the middle part seam and the bottom end seam of the lower protrusion form an n-shaped structure, and a non-inflating area is formed in the middle part of the air curtain body.

[0020] The application further provides a safety air curtain, comprising:

[0021] The air curtain structure as any one of the above;

[0022] A gas guide bag is arranged in the side air curtain, and an air outlet of the gas guide bag is directed to the intersection of the first longitudinal seam and the first transverse seam in the side air curtain.

[0023] Compared with the prior art, the technical scheme adopted by the embodiment of the application can achieve at least the following beneficial effects:

[0024] The air curtain structure of the application can form the first protection cavity, the second protection cavity and the buffer cavity in the rear end of the air curtain body by arranging the flow guide seam and the buffer seam on the bottom end seam of the lower protrusion, and the gas can directly enter the first protection cavity and the second protection cavity along the first longitudinal seam and the first transverse seam, respectively, so that the first protection cavity and the second protection cavity can be rapidly unfolded, thereby solving the problem of instability of the air curtain caused by the multi-channel gas inlet in the prior art.

[0025] Further, since the first protection cavity is directly extended into the lower protrusion, the head of the occupant can be quickly received in a small offset collision after the first protection cavity is rapidly unfolded, and the shoulder of the occupant can be supported after the first protection cavity is collided and the buffer cavity is gradually unfolded. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0027] Figure 1 It is a structural schematic diagram of an existing multi-channel side air curtain.

[0028] Figure 2 It is a structural schematic diagram of an existing frame type side air curtain.

[0029] Figure 3 It is a structural schematic diagram of an air curtain structure of the application.

[0030] The reference signs of the application are as follows:

[0031] 10, air curtain body; 11, lower protrusion; 12, middle thread; 13, guide thread; 131, first longitudinal thread; 132, first transverse thread; 133, first protection cavity; 14, buffer thread; 141, buffer cavity; 142, buffer air inlet; 143, second protection cavity; 144, second transverse thread; 145, second longitudinal thread; 15, pattern thread;

[0032] 20, air guide bag. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described in detail below with reference to the drawings.

[0034] The above examples are merely meant to be illustrative of the present application. It will thus be apparent that those embodiments are merely a part of the present application, and not all embodiments. The present application can be implemented or applied in other different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0035] It should be noted that the various aspects described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect can be implemented both as any number of software, firmware, and / or hardware structures.

[0036] It should also be noted that the figures provided in the following embodiments are merely schematic to illustrate the basic concept of the present application, and only the components related to the present application are shown in the figures, not drawn according to the number, shape and size of the components in actual implementation, and the shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout pattern of the components can be more complex.

[0037] Also in the following description, specific details are provided to facilitate thorough understanding of examples. However, one skilled in the relevant art will appreciate that embodiments can be practiced without these specific details.

[0038] As shown in Figure 1 , Figure 1 The middle side curtain rear end has a plurality of longitudinal protection cavities, and each longitudinal protection cavity is provided with an air inlet channel. Multi-channel air inlet can cause the stability of the side curtain to decrease, thereby affecting the design of the protection area. The folding mode of this kind of curtain is to fold the lower end, and the larger the inclination angle, the longer the airflow path, so that the airbag rear end cavity takes more time to deploy in place. Therefore, more design allowance is needed to compensate for the disadvantages caused by unstable air inlet.

[0039] As shown in Figure 2 , Figure 2 The middle uses a frame cavity, that is, the middle is set as a non-inflatable area, and the periphery of the non-inflatable area is set as an inflatable cavity. However, because the peripheral inflatable cavity is relatively thin, the rigidity is not enough when it is deployed, and it is easy to appear stuck. It is difficult to effectively protect the occupant when dealing with small offset collision.

[0040] Based on this, the embodiments of the present specification propose a processing scheme: as shown in Figure 3 The air curtain structure of the present application directly guides the gas to the first protection cavity 133 and the second protection cavity 143 through the flow guide suture 13, so that the first protection cavity 133 and the second protection cavity 143 are quickly deployed, and the first protection cavity 133 drives the buffer cavity 141 to quickly deploy to reach the designated protection area, thereby solving the problem of slow deployment speed of the existing side curtain far end.

[0041] The first protection cavity 133 extends to the lower convex part 11, and the first protection cavity 133 is quickly deployed, so that the part of the first protection cavity 133 at the lower end of the lower convex part 11 has fast deployment speed and strong rigidity, and will not produce stuck, thereby solving the problem of the existing side curtain setting frame cavity.

[0042] The following describes the technical solutions provided by the embodiments of the present application in conjunction with the drawings.

[0043] As shown in Figure 3As shown, the air curtain structure provided by the present application comprises an air curtain body 10, a bottom end of the air curtain body 10 is outwardly curved to form a lower protruding portion 11, a middle portion seam 12 is arranged on one side of the lower protruding portion 11 close to a front end of the air curtain body 10, and the air curtain body 10 comprises a flow guide seam 13 and a buffer seam 14. The flow guide seam 13 is sewn on the air curtain body 10 and comprises a first longitudinal seam 131 and a first transverse seam 132, the first longitudinal seam 131 extends from a bottom end seam of the lower protruding portion 11 to a top end seam of the air curtain body 10, a first protection cavity 133 is formed between the first longitudinal seam 131 and the middle portion seam 12, and the first transverse seam 132 extends from one end of the first longitudinal seam 131 close to the top end seam of the air curtain body 10 to a rear end of the air curtain body 10. The buffer seam 14 is sewn on the air curtain body 10 and is arranged on one side of the flow guide seam 13 close to a rear end seam of the air curtain body 10, a buffer cavity 141 with a buffer air inlet 142 is formed between the buffer seam 14 and the flow guide seam 13, and the buffer seam 14 and the first transverse seam 132 jointly define a second protection cavity 143 at the rear end of the air curtain body 10.

[0044] The lower protruding portion 11 can be in a V-shaped or U-shaped structure and can form a cavity to protect the occupant when inflated.

[0045] The middle portion seam 12 extends from a bottom end of the air curtain body 10 to a top end of the air curtain body 10.

[0046] The top end and the bottom end of the air curtain body 10 are the top end and the bottom end of the air curtain when the air curtain is mounted on a vehicle and unfolded, and the front end and the rear end of the air curtain body 10 are the front end and the rear end of the vehicle when the air curtain is mounted on the vehicle.

[0047] The first longitudinal seam 131 cooperates with the middle portion seam 12 to form a first protection cavity 133 in a longitudinal direction, the first protection cavity 133 can protect the occupant in a small offset collision, and the first protection cavity 133 can also protect the head of the front seat occupant when the front seat occupant is inclined at a large angle.

[0048] In some embodiments, the width of the first protection cavity 133 can be increased by adjusting the position of the first longitudinal seam 131, so that the first protection cavity 133 forms a safety seat protection cavity.

[0049] The first longitudinal seam 131 can guide the airflow to the first protection cavity 133 quickly, so that the first protection cavity 133 is quickly unfolded and maintains a high strength to protect the head of the occupant in a small offset collision.

[0050] The first transverse seam 132 is used to guide the gas to the second protection cavity 143, so that the second protection cavity 143 is quickly inflated, and the second protection cavity 143 can be quickly unfolded in place.

[0051] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0052] Further, the connection of the first longitudinal seam 131 and the first transverse seam 132 is located in the air inlet direction of the air inlet of the air curtain body 10, the first longitudinal seam 131 is used for guiding the gas to the first protection cavity 133, and the first transverse seam 132 is used for guiding the gas to the second protection cavity 143.

[0053] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0054] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0055] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0056] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0057] Further, the connection of the first longitudinal seam 131 and the first transverse seam 132 is located in the air inlet direction of the air inlet of the air curtain body 10, the first longitudinal seam 131 is used for guiding the gas to the first protection cavity 133, and the first transverse seam 132 is used for guiding the gas to the second protection cavity 143.

[0058] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0059] The first longitudinal seam 131 and the first transverse seam 132 are arranged in a whole "┌" structure.

[0060] Further, the extending tendency of the buffer thread 14 is the same as that of the guide thread 13, and the buffer thread 14 comprises a second transverse thread 144 and a second longitudinal thread 145; the second longitudinal thread 145 extends from the bottom end thread of the lower protrusion 11 to the first transverse thread 132 in proximity, and the second transverse thread 144 extends from the end of the second longitudinal thread 145 to the rear end thread of the air curtain body 10 in proximity of the first transverse thread 132.

[0061] Wherein, the first transverse thread 132, the first longitudinal thread 131 cooperate with the second transverse thread 144, the second longitudinal thread 145 so that the buffer cavity 141 as a whole forms a "┌" structure, so as to increase the volume of the buffer cavity 141 without affecting the volume of the second protection cavity 143 and the first protection cavity 133, so that the gas can first fill the first protection cavity 133 and the second protection cavity 143.

[0062] Further, after the first transverse thread 132 bends away from the end of the first longitudinal thread 131 to the bottom end thread of the air curtain body 10, it extends in the direction of the second transverse thread 144, so that the first transverse thread 132 and the second transverse thread 144 form a buffer air inlet 142, which is arranged towards the bottom end thread of the air curtain body 10.

[0063] Wherein, by arranging the buffer air inlet 142 towards the bottom end thread of the air curtain body 10, the gas can enter the buffer cavity 141 after filling the second protection cavity 143, so as to ensure that the second protection cavity 143 is filled first.

[0064] Wherein, by extending the first transverse thread 132 in the direction of the second transverse thread 144, the end of the first transverse thread 132 forms an arc structure, so that the airflow can enter the second protection cavity 143 more smoothly, and the end of the first transverse thread 132 will not be torn by the impact of the gas.

[0065] Further, the air curtain structure further comprises a pattern thread 15, which extends from the rear end thread of the air curtain body 10 into the second protection cavity 143, for defining the thickness of the second protection cavity 143, so that the second protection cavity 143 has sufficient rigidity.

[0066] Further, the pattern thread 15 extends obliquely upwards from the rear end thread of the air curtain body 10 and approaches the first transverse thread 132; wherein, the pattern thread 15 and the first transverse thread 132 make part of the second protection cavity 143 form a longitudinal cavity to accommodate the head of the occupant.

[0067] Wherein, the flower-shaped sewing line 15 can make the approximate longitudinal cavity in the second protection cavity 143 still be able to puff up enough thickness when the gas amount is insufficient, and by flexibly adjusting the length, position and the like of the flower-shaped sewing line 15, the required rigidity under different intervals (the distance from the rear interior part to the dummy head) can be met, and the problem that the rear end size of the second protection cavity 143 is too large to be inconvenient to be unfolded in the vehicle, such as being stuck by the rear seat, the dummy injury value exceeding the standard and the like can be avoided.

[0068] Wherein, the flower-shaped sewing line 15 can cooperate with the first transverse sewing line 132 to define the approximate longitudinal cavity at the part of the air curtain body 10 bending downward at the rear of the air curtain body 10, so as to protect the passenger.

[0069] Further, the first longitudinal sewing line 131 is arranged to be inclined, so that the first protection cavity 133 is defined as a longitudinal cavity with an inclined angle, so as to facilitate the first protection cavity 133 to drive the buffer cavity 141 to unfold in the transverse and longitudinal directions.

[0070] Specifically, by arranging the first longitudinal sewing line 131 to be inclined, the first protection cavity 133 is also defined to be inclined at least on one side, so that when unfolded, the first protection cavity 133 can drive the buffer cavity 141 to unfold in the transverse and longitudinal directions, avoiding that the buffer cavity 141 is stuck (such as being stuck by the child seat) in the transverse or longitudinal direction and cannot be quickly unfolded.

[0071] Further, the middle sewing line 12 and the bottom end sewing line of the lower convex part 11 extend to form an n-shaped structure, and a non-inflating area is formed in the middle of the air curtain body 10, so that the gas enters the protection cavity first, and the side air curtain cannot be completely unfolded due to insufficient gas amount.

[0072] The gas of the present application flows to the rear end of the air curtain body 10, and a branch is formed by the first transverse sewing line 132 and the first longitudinal sewing line 131, without the need to introduce the gas flow through other cavity channels, and by adjusting the distance between the first transverse sewing line 132 and the top end sewing line of the air curtain body 10 or the distance between the first longitudinal sewing line 131 and the central sewing line, the arrival time of the small offset protection area under different requirements can be met.

[0073] The present application directly charges the first protection cavity 133 and the second protection cavity 143 through a single branch, so that the first protection cavity 133 and the second protection cavity 143 can be quickly positioned to provide protection, and the unfolding posture is stable.

[0074] The present application also provides a safety air curtain, which comprises the air curtain structure and the gas guide bag 20, the gas guide bag 20 is arranged in the side air curtain, and one gas outlet of the gas guide bag 20 faces the intersection of the first longitudinal sewing line 131 and the first transverse sewing line 132 in the side air curtain.

[0075] The first protection cavity 133 is a straight cavity, so that the side curtain can be quickly deployed to the designated position and keep good stability within a specified time.

[0076] The first protection cavity 133 and the second protection cavity 143 of the safety curtain can be filled and form rigidity within a specified time, and the first protection cavity 133 can drive the buffer cavity 141 to quickly reach the designated protection position, so as to avoid the delay of the airbag due to the lower end jamming, and the buffer cavity 141 is deployed after the first protection cavity 133 and the second protection cavity 143 are filled, so that the first protection cavity 133 and the second protection cavity 143 can provide better protection capability.

[0077] The first protection cavity 133 can protect the head of the occupant in a small offset collision, so as to avoid the impact between the head of the occupant and the door trim.

[0078] In the specification, the same or similar parts among various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. Especially, for the product embodiment described later, since it is corresponding to the method, the description is relatively simple, and the related parts can be referred to the part of the system embodiment.

[0079] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air curtain structure comprising an air curtain body, a bottom end of the air curtain body is sewn outwardly to form a lower protrusion, a middle part of the lower protrusion is provided with a longitudinal middle seam near a side of a front end of the air curtain body, characterized in that, The air curtain body comprises: a guide flow thread sewn on the air curtain body, comprising a first longitudinal thread and a first transverse thread, the first longitudinal thread extending from the bottom end thread of the lower convex part to the top end thread of the air curtain body, the first longitudinal thread and the middle thread forming a first protection cavity, and the first transverse thread extending from the end of the first longitudinal thread close to the top end thread of the air curtain body to the rear end of the air curtain body; a buffer thread sewn on the air curtain body and located on the side of the guide flow thread close to the rear end thread of the air curtain body, the buffer thread and the guide flow thread forming a buffer cavity with a buffer air inlet, and the buffer thread and the first transverse thread jointly defining a second protection cavity at the rear end of the air curtain body.

2. The curtain of gas structure of claim 1, wherein, The connection of the first longitudinal thread and the first transverse thread is located in the air inlet direction of the air inlet of the air curtain body, the first longitudinal thread is used for guiding the air flow to the first protection cavity, and the first transverse thread is used for guiding the air flow to the second protection cavity.

3. The curtain of gas structure of claim 1, wherein, The end of the first transverse thread away from the first longitudinal thread is bent to the bottom end thread of the air curtain body to guide the air flow to the bottom end thread of the air curtain body.

4. The gas curtain structure of claim 3, wherein, The extension trend of the buffer thread is the same as that of the guide flow thread, and the buffer thread comprises a second transverse thread and a second longitudinal thread; The second longitudinal thread extends from the bottom end thread of the lower convex part to the first transverse thread, and the second transverse thread extends from the end of the second longitudinal thread to the rear end thread of the air curtain body close to the first transverse thread.

5. The gas curtain structure of claim 4, wherein, After the end of the first transverse thread away from the first longitudinal thread is bent to the bottom end thread of the air curtain body, the first transverse thread extends to the direction of the second transverse thread, so that the buffer air inlet is formed between the first transverse thread and the second transverse thread, and the buffer air inlet is arranged towards the bottom end thread of the air curtain body.

6. The curtain of air structure of claim 3, wherein, Further comprising a pattern thread extending from the rear end thread of the air curtain body into the second protection cavity for defining the thickness of the second protection cavity.

7. The gas curtain structure of claim 6, wherein, The pattern thread extends obliquely upwards from the rear end thread of the air curtain body and close to the first transverse thread. The second protection cavity is formed as a longitudinal cavity between the pattern thread and the first transverse thread to accommodate the head of the occupant.

8. The curtain of air structure of claim 1, wherein, The first longitudinal thread is arranged obliquely, so that the first protection cavity is defined as a longitudinal cavity with an oblique angle to facilitate the first protection cavity to drive the buffer cavity to expand in the transverse and longitudinal directions.

9. The curtain of gas structure of claim 1, wherein, The middle thread and the bottom end thread of the lower convex part extend to form an n-shaped structure, and a non-inflatable area is formed in the middle of the air curtain body.

10. A safety curtain, characterized by The air curtain structure according to any one of claims 1-9; a gas guide bag arranged in the air curtain structure, and having an air outlet towards the joint of the first longitudinal thread and the first transverse thread in the air curtain structure. ​

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