Side airbag

Abstract

The application provides a side airbag applied to the technical field of vehicle safety, wherein the side airbag is installed on the side of a seat and is formed by sewing edges of airbag panels after the airbag panels are folded along a vertical folding line. The airbag panels are folded to form inner panels and outer panels. The sewing thread includes a first sewing thread and a second sewing thread. The first sewing thread is configured to sew along most of the edges of the inner panels and the outer panels, and an opening is left at the part of the edges away from the vertical folding line. The second sewing thread is configured to sew the inner panels at the opening after the inner panels are folded and aligned in a direction perpendicular to the vertical folding line, and / or to sew the outer panels at the opening after the outer panels are folded and aligned in a direction perpendicular to the vertical folding line. Compared with the prior art, the thickness of the side airbag at the arms of the passenger is increased, the arms of the passenger can be lifted during the unfolding process, and the chest and abdomen of the passenger are effectively protected.

Description

Technical Field

[0001] This application relates to the field of vehicle safety technology, specifically to a side airbag. Background Technology

[0002] In the China New Car Assessment Program (CNCAP) side impact test and the China Insurance Automotive Safety Index (C-IASI) small offset crash test, in order to achieve better protection for front-seat occupants, side airbags and side curtain airbags with sufficient protection area and better energy absorption performance are often required to meet the protection performance requirements. Summary of the Invention

[0003] In view of this, the embodiments of this specification provide a side airbag that provides sufficient protection area for occupants and has good energy absorption performance, so as to improve the protection effect for front-seat occupants.

[0004] The embodiments in this specification provide the following technical solutions:

[0005] This specification provides an embodiment of a side airbag, installed on the side of a seat. It is formed by folding an airbag panel along a vertical fold line and then sewing the edges together. The folded airbag panel forms an inner layer and an outer layer. The sewing includes a first sewing thread and a second sewing thread.

[0006] The first seam is configured to be sewn along most of the edges of the inner and outer fabric pieces, leaving an opening unsewn at the edges away from the vertical fold line.

[0007] The second seam is configured to fold and align the inner layer piece at the pre-reserved opening along a direction perpendicular to the vertical fold line before sewing, and / or fold and align the outer layer piece at the pre-reserved opening along a direction perpendicular to the vertical fold line before sewing.

[0008] When the side airbag is inflated and deployed, the area where the first and second seams intersect extends to the area below the occupant's arm and / or the side of their chest.

[0009] Preferably, the inner and / or outer cut pieces at the reserved opening have a fish-mouth-shaped opening, including an upper edge, a lower edge, and a middle connecting part. The middle connecting part is pulled out in a direction away from the interior of the airbag cavity, and the upper and lower edges are aligned before a second seam is sewn.

[0010] Preferably, the second seam of the inner layer fabric piece and the second seam of the outer layer fabric piece are integral continuous seams.

[0011] Preferably, the airbag panel comprises: one posterior cavity panel and two anterior cavity panels.

[0012] A front cavity piece is sewn onto the left and right sides of the back cavity piece using a third seam. The third seam stitches together a portion of the edge of the front cavity piece and the inner area of ​​the back cavity piece, forming an overlapping area between the front cavity piece and the back cavity piece. The overlapping area on the back cavity piece has a connecting opening. The reserved opening is located on the front cavity piece on the side away from the third seam.

[0013] Preferably, the process of folding the airbag cut piece along the vertical fold line and then sewing the edge with stitches includes:

[0014] Sew the left and right edges of the back cavity piece together using the fourth suture.

[0015] Sew the edges of the remaining parts of the back cavity cut piece and the edges of the front cavity cut piece, excluding the reserved opening, together with the first suture line;

[0016] Sew the pre-reserved opening in the front cavity piece together using the second suture.

[0017] The internal space between the back cavity piece and the fourth and first seams forms the back cavity, and the internal space between the two front cavity pieces forms the front cavity.

[0018] Preferably, the back cavity panel has vertical edges on both sides, and the back cavity is cylindrical after sewing.

[0019] Preferably, the third seam is V-shaped, extending from the vertical edge into the interior of the back cavity piece, and the connecting opening is located at the bend of the third seam.

[0020] Preferably, the front part of the anterior cavity is V-shaped, and the upper part fits the shoulder and upper arm extension of the occupant.

[0021] Preferably, it also includes two reinforcing fabric pieces, which are disposed in the overlapping areas of the rear cavity cut piece and the two front cavity cut pieces respectively, and the reinforcing fabric pieces corresponding to the communication openings on the rear cavity cut pieces are provided with vents.

[0022] Preferably, the rear cavity panel has an opening and / or bolt hole for inserting a gas generator on the side near the vertical fold line.

[0023] Compared with the prior art, the beneficial effects that can be achieved by the above-mentioned at least one technical solution adopted in the embodiments of this specification include at least the following: by folding the airbag cut piece along the vertical fold line and sewing the edge with a stitch, wherein the inner layer cut piece and the outer layer cut piece are sewn together by a first stitch, and an opening is reserved at the edge away from the vertical fold line without sewing, and the reserved opening is sewn by a second stitch. Specifically, the inner layer cut piece at the reserved opening is aligned and sewn together in a direction perpendicular to the vertical fold line, and the outer layer cut piece is folded and aligned in a direction perpendicular to the vertical fold line and then sewn together, so that when the side airbag is in the inflated and deployed state, the intersection area of ​​the first stitch and the second stitch extends to the area below the occupant's arm and / or the side of the chest. By increasing the thickness through the first stitch and the second stitch for arm protection, the thickness of the side airbag located at the occupant's arm position can be increased, so that the occupant's arm can be raised to protect the occupant's chest and abdomen during the deployment of the side airbag. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an airbag cut piece for a side airbag provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of a side airbag cut piece after being folded along a vertical folding line, according to an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the first seam in a side airbag provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the first and second seams in a side airbag provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of a back cavity cut piece, a reinforcing fabric piece, and a front cavity cut piece provided in an embodiment of this application.

[0030] Figure label:

[0031] 1-Airbag cut piece;

[0032] 10-Inner layer fabric piece;

[0033] 11-Outer layer fabric piece;

[0034] 12-Back cavity cut piece;

[0035] 121 - Connecting port;

[0036] 122 - Opening and / or bolt hole;

[0037] 13-Anterior cavity cut piece;

[0038] 131 - Exhaust port;

[0039] 14-Reinforcing fabric piece;

[0040] 141 - Vent;

[0041] 2-Vertical fold line;

[0042] 3-First suture;

[0043] 4- Reserve an opening;

[0044] 40 - Top edge;

[0045] 41 - Lower edge;

[0046] 42 - Intermediate connecting part;

[0047] 5-Second suture;

[0048] 6-Third suture;

[0049] 7 - Fourth suture. Detailed Implementation

[0050] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0051] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0053] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0054] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0055] In the CNCAP side impact test and the C-IASI small offset crash test, in order to achieve better protection for front-seat occupants, side airbags and side curtain airbags with sufficient protection area and better energy absorption performance are often required to meet the protection performance requirements.

[0056] Based on this, the embodiments of this specification propose a processing solution: An opening is reserved on the edge of the airbag piece away from the vertical fold line. After folding the airbag piece along the vertical fold line, the edges other than the reserved opening are sewn together with a first seam. Then, the reserved opening is pinched together and sewn together with a second seam, so that the sewn side airbag is in a three-dimensional state. This increases the thickness of the side airbag at the occupant's arm, allowing the occupant's arm to be raised to protect the occupant's chest and abdomen during deployment.

[0057] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0058] like Figures 1 to 5 As shown in the embodiment of this specification, a side airbag is provided, which is installed on the side of the seat. It is formed by folding the airbag piece 1 along the vertical folding line 2 and sewing the edge with a sewing thread. After folding, the airbag piece 1 forms an inner piece 10 and an outer piece 11. The sewing thread includes a first sewing thread 3 and a second sewing thread 5.

[0059] Among them, the inner layer piece 10 refers to the side of the airbag piece 1 that is close to the occupant after being folded along the vertical fold line 2, and the outer layer piece 11 refers to the side of the airbag piece 1 that is away from the occupant after being folded along the vertical fold line 2.

[0060] In the embodiments of this specification, the edge of the airbag piece 1 after being folded along the vertical fold line 2 is sewn together by the first seam 3 and the second seam 5.

[0061] The first seam 3 is configured to sew along most of the edges of the inner layer piece 10 and the outer layer piece 11, leaving an opening 4 unsewn at a portion of the edge away from the vertical fold line 2; the second seam 5 is configured to fold and align the inner layer piece 10 at the reserved opening 4 in a direction perpendicular to the vertical fold line 2 before sewing, and / or fold and align the outer layer piece 11 at the reserved opening 4 in a direction perpendicular to the vertical fold line 2 before sewing.

[0062] Specifically, the first seam 3 sews together most of the edges of the inner layer 10 and the outer layer 11 after the airbag piece 1 is folded along the vertical fold line 2, and sews the inner layer 10 and the outer layer 11 together, and leaves an opening 4 on the inner layer 10 and the outer layer 11 away from the vertical fold line 2 without sewing.

[0063] In the embodiments described in this specification, the inner layer piece 10 and the outer layer piece 11 are sewn together in a planar state by the first seam 3.

[0064] Furthermore, the second seam 5 will sew the reserved openings 4 on the inner layer fabric piece 10 and the outer layer fabric piece 11 together. Specifically, the inner layer fabric piece 10 at the reserved opening 4 is folded and aligned in a direction perpendicular to the vertical fold line 2 and then sewn, and / or the outer layer fabric piece 11 at the reserved opening 4 is folded and aligned in a direction perpendicular to the vertical fold line 2 and then sewn. That is, the inner layer fabric piece 10 and the outer layer fabric piece 11 are folded and aligned towards the outside of the airbag cavity in a direction perpendicular to the vertical fold line 2 and then sewn together. The inner layer 10 and the outer layer 11 are sewn together in a three-dimensional state by the second seam 5, so that the side airbag after being sewn by the first seam 3 and the second seam 5 is in a three-dimensional state, and the thickness of the portion of the inner layer 10 and the outer layer 11 away from the vertical fold line 2 is increased. The portion of the inner layer 10 and the outer layer 11 away from the vertical fold line 2 is located at the front end of the side airbag near the occupant's arm.

[0065] Furthermore, when the side airbag is inflated and deployed, the area where the first seam 3 and the second seam 5 intersect extends to the area below the occupant's arm and / or the side of the chest.

[0066] In the embodiments described in this specification, the first seam 3 is used to sew the inner layer piece 10 and the outer layer piece 11 together, and the second seam 5 is used to sew any one layer of the inner layer piece 10 and the outer layer piece 11 together. The first seam 3 and the second seam 5 intersect to increase the thickness for the protection of the occupant's raised arm.

[0067] In one alternative implementation, such as Figure 1 As shown, the inner layer piece 10 and / or outer layer piece 11 at the reserved opening 4 have a fish mouth-shaped opening, which includes an upper edge 40, a lower edge 41, and a middle connecting part 42.

[0068] like Figure 2 As shown, after folding the airbag panel 1 along the vertical fold line 2, the reserved openings 4 on the inner panel 10 and the outer panel 11 overlap. Specifically, the upper edge 40, lower edge 41, and middle connecting portion 42 of the fish-mouth-shaped opening of the inner panel 10 overlap with the upper edge 40, lower edge 41, and middle connecting portion 42 of the fish-mouth-shaped opening of the outer panel 11, respectively, forming... Figure 2 The reserved opening 4 shown in the figure.

[0069] Furthermore, the middle connecting part 42 of the inner layer piece 10 and the outer layer piece 11 are pulled out in a direction away from the inside of the airbag cavity, and the upper edge 40 and the lower edge 41 are aligned before sewing the second seam 5.

[0070] Preferably, the second seam 5 of the inner layer piece 10 and the second seam 5 of the outer layer piece 11 are integral continuous seams.

[0071] Figure 3 The structure of the dotted circle formed by sewing the second seam 5 with the reserved opening 4 is shown in the enlarged view below. Figure 4 As shown.

[0072] In the embodiments described in this specification, the fish-mouth-shaped opening facilitates the sewing of the side airbags, ensuring batch consistency, as only the edges need to be sewn.

[0073] Furthermore, such as Figure 4 As shown, the first seam 3 and the second seam 5 are perpendicular to each other, which can increase the thickness of the side airbag near the occupant's arm. When the first seam 3 and the second seam 5 are perpendicular to each other, the thickness of the side airbag near the occupant's arm is the greatest, and the widening effect of the airbag brought by the second seam 5 is maximized through the integrated continuous seam.

[0074] By setting the angle between the upper edge 40 and the lower edge 41 of the fish mouth-shaped opening, the fish mouth-shaped opening after folding and alignment can be sewn in a continuous manner. For example, the angle between the upper edge 40 and the other edges is 90 degrees, and the angle between the upper edge 40 and the lower edge 41 is 120 degrees. At this time, the sewing will be continuous.

[0075] like Figure 5 As shown, the airbag panel 1 includes: a rear cavity panel 12 and two front cavity panels 13. A front cavity panel 13 is sewn onto the left and right sides of the rear cavity panel 12 by a third suture 6. The third suture 6 sews a portion of the edge of the front cavity panel 13 to the internal area of ​​the rear cavity panel 12, forming an overlapping area between the front cavity panel 13 and the rear cavity panel 12. The overlapping area on the rear cavity panel 12 is provided with a connecting opening 121. A reserved opening 4 is provided on the side of the front cavity panel 13 away from the third suture 6.

[0076] Among them, an exhaust port 131 is provided on the front cavity piece 13 sewn on the rear cavity piece 12 on the side where the connecting port 121 is located.

[0077] In the embodiments of this specification, the process of folding the airbag piece 1 along the vertical fold line 2 and then sewing the edges includes: sewing the left and right edges of the rear cavity piece 12 with the fourth seam 7; sewing the other edges of the rear cavity piece 12 and the edges of the front cavity piece 13 except for the reserved opening 4 with the first seam; sewing the reserved opening 4 of the front cavity piece 13 with the second seam 5, so that the internal space between the rear cavity piece 12 and the fourth seam 7 and the first seam 3 forms the rear cavity, and the internal space between the two front cavity pieces 13 forms the front cavity.

[0078] Among them, after the left and right sides of the back cavity piece 12 are sewn together with the fourth seam 7, the left and right sides of the back cavity piece 12 have vertical edges, and the back cavity as a whole is cylindrical after sewing.

[0079] Specifically, the third seam 6 is V-shaped and extends from the vertical edge into the interior of the rear cavity piece 12, with the connecting opening 121 located at the bend of the third seam 6.

[0080] Furthermore, the front part of the anterior cavity is V-shaped, and the upper part fits the occupant's shoulder and upper arm extension.

[0081] Furthermore, the side airbag also includes two reinforcing fabric pieces 14, which are disposed in the overlapping areas of the rear cavity cut piece 12 and the two front cavity cut pieces 13, respectively. The reinforcing fabric pieces 14 corresponding to the communication opening 121 on the rear cavity cut piece 12 are provided with vents 141.

[0082] When the reinforcing fabric piece 14 corresponding to the connecting opening 121 on the rear cavity piece 12 is sewn onto the rear cavity piece 12, the connecting opening 121 and the vent 141 overlap. A circle is sewn around the outer edge of the overlapping area of ​​the connecting opening 121 and the vent 141 to fix the connecting opening 121 and the vent 141 and to prevent air leakage.

[0083] In the embodiments described in this specification, the rear cavity cut piece 12 is provided with an opening and / or bolt hole 121 for inserting a gas generator on the side near the vertical fold line 2.

[0084] The embodiments in this specification implement a dual-cavity airbag design with separate front and rear cavities and single-hole air conduction. This design can meet the needs of the front and rear cavities in the initial stage of a collision and the on-demand distribution of pressure. The cylindrical rear cavity with higher internal pressure can resist vehicle intrusion during a collision while pushing the occupant's torso to avoid direct injury, while the front cavity with lower internal pressure can effectively protect the occupant's torso. The front cavity incorporates a "V"-shaped piece for transverse sewing on the basis of conventional longitudinal sewing of the airbag to increase the transverse thickness of the inflated airbag, which helps to push the occupant's arm movement and absorb energy, thereby improving the protection performance of the occupant. The transverse sewing combined with the "V"-shaped piece design can achieve a unique 3D effect through two 2D pieces. Compared with the traditional 3D effect of three 2D pieces, it can effectively reduce one piece and reduce the complexity of sewing, while achieving the preset 3D protection effect. The heat-insulating airbag design with a hole at the front end of the side seam can meet the protection requirements of the side-mounted airbag module airbag, which prioritizes the upper and lower ends of the rear cavity for inflation before inflating the front cavity.

[0085] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the product embodiments described later are relatively simple since they correspond to the methods; relevant parts can be referred to the descriptions in the system embodiments.

[0086] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A side airbag, installed on the side of a seat, formed by folding an airbag piece along a vertical fold line and then sewing the edges together, characterized in that... The airbag panel is folded to form an inner panel and an outer panel. The inner panel refers to the side of the airbag panel closest to the occupant after folding along the vertical fold line, and the outer panel refers to the side of the airbag panel furthest from the occupant after folding along the vertical fold line. The stitching includes a first stitch and a second stitch. The first seam is configured to sew along most of the edges of the inner and outer fabric pieces, leaving an opening unsewn at a portion of the edge away from the vertical fold line. The second seam is configured to fold and align the inner layer piece at the reserved opening along a direction perpendicular to the vertical fold line before sewing, and / or fold and align the outer layer piece at the reserved opening along a direction perpendicular to the vertical fold line before sewing. When the side airbag is inflated and deployed, the area where the first and second seams intersect extends to the area below the occupant's arm and / or the side of the chest.

2. The side airbag according to claim 1, characterized in that, The inner and / or outer cut pieces at the reserved opening have a fish-mouth-shaped opening, including an upper edge, a lower edge, and a middle connecting part. The middle connecting part is pulled out in a direction away from the interior of the airbag cavity, and the upper and lower edges are aligned before the second seam is sewn on.

3. The side airbag according to claim 2, characterized in that, The second seam of the inner layer fabric piece and the second seam of the outer layer fabric piece are an integral, continuous seam.

4. The side airbag according to any one of claims 1-3, characterized in that, The airbag insert comprises: one posterior cavity insert and two anterior cavity inserts. A front cavity piece is sewn onto the left and right sides of the rear cavity piece by a third seam. The third seam sews a portion of the edge of the front cavity piece to the inner area of ​​the rear cavity piece, forming an overlapping area between the front cavity piece and the rear cavity piece. The overlapping area on the rear cavity piece is provided with a connecting opening. The reserved opening is located on the front cavity piece away from the third seam.

5. The side airbag according to claim 4, characterized in that, The process of folding the airbag cut piece along the vertical fold line and then sewing the edges includes: The left and right edges of the rear cavity piece are sewn together with the fourth suture. Sew the edges of the other parts of the rear cavity cut piece and the edges of the front cavity cut piece, excluding the reserved opening, together with the first suture line; The reserved opening of the front cavity piece is sewn together using the second suture. The internal space between the rear cavity panel and the fourth seam and the first seam forms the rear cavity, and the internal space between the two front cavity panels forms the front cavity.

6. The side airbag according to claim 5, characterized in that, The back cavity panel has vertical edges on both sides, and the back cavity is cylindrical after sewing.

7. The side airbag according to claim 6, characterized in that, The third seam is V-shaped and extends from the vertical edge into the interior of the back cavity piece, narrowing outwards. The connecting opening is located at the bend of the third seam.

8. The side airbag according to claim 5, characterized in that, The front part of the cavity is V-shaped, and the upper part fits the shoulder and upper arm extension of the occupant.

9. The side airbag according to claim 5, characterized in that, It also includes two reinforcing fabric pieces, which are disposed in the overlapping areas of the rear cavity cut piece and the two front cavity cut pieces respectively, and the reinforcing fabric pieces corresponding to the communication opening on the rear cavity cut piece are provided with vents.

10. The side airbag according to claim 5, characterized in that, The rear cavity panel has an opening and / or bolt hole for inserting a gas generator on the side near the vertical fold line.

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