Folding air bag, air bag folding method, safety air bag assembly and vehicle

Abstract

The invention relates to a folding air bag, an air bag folding method, a safety air bag assembly and a vehicle. The at least one folding part is connected to the main body part in a bending manner; wherein at least one folding part is provided with a pre-sewing line, and the at least one folding part is fixedly connected with the main body part through the pre-sewing line. According to the technical scheme, the impact force of the air bag is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of folding airbags, and in particular to a folding airbag, an airbag folding method, a safety airbag assembly and a vehicle. Background Art

[0002] At present, the existing airbags adopt manual folding steps such as Z-folding and roll-folding. When the airbag is working, due to the large impact force of the airbag, this will increase the impact on the occupants when they touch the airbag, thereby failing to ensure the safety of the occupants. Summary of the invention

[0003] The embodiments of the present application provide a foldable airbag, an airbag folding method, a safety airbag assembly and a vehicle, which reduce the impact force of the airbag to at least partially solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an airbag is provided, comprising: a main body; at least one folding portion, bent and connected to the main body; wherein at least one folding portion is provided with a pre-sewn line, and at least one folding portion is fixedly connected to the main body through the pre-sewn line.

[0005] Optionally, the folding portion includes a first folding portion, which is provided at one end of the folded airbag and is suitable for extending into an upper portion of the steering wheel.

[0006] Optionally, the virtual circle where the folded airbag is located is divided into a first area, a second area, a third area and a fourth area with equal areas by a virtual cross line passing through the folded airbag, and the first folded portion is located in the first area and the second area.

[0007] Optionally, the virtual cross line includes a first center line separating the first region and the third region and a second center line separating the third region and the fourth region, and the first folding portion is symmetrical about the second center line.

[0008] Optionally, a first folding line and a vent hole are provided in the first area and the second area, and the first folding line is used to make the folded first folded portion include the vent hole.

[0009] Optionally, the first folding portion is provided with at least one first pre-sewn line, and the at least one first pre-sewn line is parallel to the first folding line.

[0010] Optionally, the distance between at least one first pre-sewn line and the first folding line is greater than 20 mm.

[0011] Optionally, the first folding portion is provided with a plurality of first pre-stitched lines, and the interval between two adjacent first pre-stitched lines is 15 mm-25 mm.

[0012] Optionally, the first folding portion is provided with at least one second pre-sewn line, and the second pre-sewn line is symmetrically arranged about the second center line.

[0013] Optionally, the first pre-sewn line is arranged close to the first folding line, and the second pre-sewn line is arranged away from the first folding line.

[0014] Optionally, at least two second pre-stitched lines have unequal extension lengths.

[0015] Optionally, the closest distance between at least one second pre-sewn line and the periphery of the first folded portion is greater than 20 mm.

[0016] Optionally, the first folding portion is provided with a plurality of second pre-stitched lines, and the interval between two adjacent second pre-stitched lines is 5 mm-10 mm.

[0017] Optionally, the main body is provided with at least one main body pre-sewn line, and the main body has a first layer and a second layer relative to each other, and the first layer is fixedly connected to the second layer by at least one main body pre-sewn line.

[0018] Optionally, the virtual circle where the folded airbag is located is divided into a first area, a second area, a third area and a fourth area with equal areas by a virtual cross line passing through the folded airbag; wherein at least one main body pre-sewn line is located in the third area and the fourth area.

[0019] Optionally, the virtual cross line includes a first center line and a second center line, and at least one main body pre-sewn line is symmetrical about the second center line.

[0020] Optionally, the main body is provided with a plurality of main body pre-sewn lines, and the distance between two adjacent main body pre-sewn lines is between 5mm and 15mm.

[0021] Optionally, the extension length of the main pre-stitched line is 180mm-220mm.

[0022] Optionally, the distance between at least one main pre-sewn line and the first center line is 92.5mm-132.5mm.

[0023] Optionally, the plurality of folded portions include a second folded portion and a third folded portion, wherein a portion of the third folded portion covers a portion of the second folded portion.

[0024] Optionally, the foldable airbag further comprises a drawstring, which is disposed between the first layer and the second layer, and the drawstring is fixedly connected to the first layer and the second layer via at least one main pre-sewn line and at least one second pre-sewn line.

[0025] Optionally, the virtual circle where the folded airbag is located is divided into a first area, a second area, a third area and a fourth area of ​​equal area by a virtual cross line passing through the folded airbag; wherein the second folding portion is located in the first area or the second area, and the third folding portion is located in the first area and the second area.

[0026] Optionally, the virtual cross line includes a first center line separating the first area and the third area and a second center line separating the third area and the fourth area. A second folding line is provided in the first area, one of the endpoints of the second folding line is one of the endpoints of the first center line, the other endpoint of the second folding line is located on the virtual circle, and the other endpoint of the second folding line is at a distance of 42.5mm-82.5mm from the second center line.

[0027] Optionally, the second folding portion is provided with at least one third pre-sewn line, and the at least one third pre-sewn line is parallel to the second folding line.

[0028] Optionally, the distance between at least one third pre-sewn line and the second folding line is 10mm-50mm.

[0029] Optionally, the extension length of the third pre-stitched line is 50 mm-90 mm.

[0030] Optionally, a center line of the third folded portion overlaps with the second center line.

[0031] Optionally, the third folding portion is provided with a third folding line, and the distance between the third folding line and the first center line is 90mm-130mm.

[0032] Optionally, the third folding portion is provided with a fourth pre-sewn line, and the fourth pre-sewn line is symmetrically arranged about the midline of the third folding portion.

[0033] Optionally, the third folding portion is provided with a plurality of fourth pre-stitched lines, and the interval between two adjacent fourth pre-stitched lines is 5 mm-15 mm.

[0034] Optionally, the extension length of the fourth pre-stitch is 40mm-80mm.

[0035] Optionally, the distance between at least one fourth pre-sewn line and the top of the third folded portion is 20 mm-60 mm.

[0036] Optionally, the third folding portion is provided with a fifth pre-sewn line, and the fifth pre-sewn line is symmetrically arranged about the midline of the third folding portion.

[0037] Optionally, the extension length of the fifth pre-stitch is 80 mm-120 mm.

[0038] Optionally, the distance between the fifth pre-sewn line and the third folding line is 3mm-7mm.

[0039] Optionally, the second folding portions include two, and the two second folding portions are located on opposite sides of a midline of the third folding portion.

[0040] According to a second aspect of the present application, an airbag folding method is provided for forming a folded airbag, comprising providing an initial airbag; folding the initial airbag at least once to form a main body and at least one folded portion; and forming a pre-stitched line on at least one folded portion.

[0041] Optionally, the step of folding the initial air bag at least once specifically includes: folding the initial air bag to form a first folded portion.

[0042] Optionally, the step of folding the initial air bag at least once further comprises: folding the initial air bag multiple times to form a main body portion, multiple second folded portions and a third folded portion.

[0043] Optionally, the step of forming a pre-sewn line on at least one folded portion specifically includes:

[0044] forming a third pre-sewn line on the second folded portion;

[0045] forming a fourth pre-sewn line and a fifth pre-sewn line on the third folded portion;

[0046] A main body pre-sewn line is formed on the main body portion.

[0047] According to a third aspect of the present application, there is provided a safety airbag assembly, comprising a folded airbag, a generator corresponding to the folded airbag, and a housing for accommodating the folded airbag and the generator.

[0048] According to a fourth aspect of the present application, a vehicle is provided, characterized in that it includes an airbag assembly.

[0049] In the folding airbag of the embodiment of the present application, through the above-mentioned technical scheme, at least one folding part is provided, and at least one folding part is provided with a pre-stitched line. In this way, when the airbag is working, the setting of the pre-stitched line can also enable the folding part to expand outward when unfolding, avoiding the situation of local excessively fast or excessively slow unfolding, thereby effectively reducing the impact force on the neck and chest to a certain extent, reducing the risk of injury to the driver.

[0050] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0052] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0053] Figure 1 is a schematic diagram of the overall structure of a foldable air bag provided in an exemplary embodiment of the present disclosure;

[0054] Figure 2 is an overall cross-sectional view of a folded air bag provided in an exemplary embodiment of the present disclosure;

[0055] Figure 3 is a schematic flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure;

[0056] Figure 4 It is a schematic diagram of the inflation state of the prior art air bag;

[0057] Figure 5 is a schematic diagram of an inflated state of an air bag provided in an exemplary embodiment 1 of the present disclosure;

[0058] Figure 6 is a schematic diagram of an inflated state of an air bag provided in a second exemplary embodiment of the present disclosure;

[0059] Figure 7 is a schematic flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure;

[0060] Figure 8 is a schematic flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure;

[0061] Fig. 9 is a schematic flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure;

[0062] Fig.10 Schematic diagram of a flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure.

[0063] Description of reference numerals:

[0064] Folding air bag 1, main body 10, folding portion 20, first folding portion 21, second folding portion 22, third folding portion 24, first area 31, second area 32, third area 33, fourth area 34, virtual cross line 40, first center line 41, second center line 42, first folding line 51, first pre-stitched line 52, second folding line 61, second pre-stitched line 62, third pre-stitched line 72, third folding line 74, fourth pre-stitched line 75, fifth pre-stitched line 76, main body pre-stitched line 81, exhaust hole 90. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0066] like Figures 1 to 10 As shown, in order to achieve the above-mentioned purpose, according to the first aspect of the present application, an airbag is provided, comprising: a main body 10; at least one folding portion 20, bent and connected to the main body 10; wherein at least one folding portion 20 is provided with a pre-sewn line, and at least one folding portion 20 is fixedly connected to the main body 10 through the pre-sewn line.

[0067] In the folding airbag 1 of the embodiment of the present application, through the above-mentioned technical scheme, at least one folding portion 20 is provided, and at least one folding portion 20 is provided with a pre-stitched line, so that when the airbag is working, it is convenient to inflate and unfold the folding portion 20, and the provision of the pre-stitched line can also enable the folding portion 20 to expand outward more evenly when unfolding, avoiding the situation of local excessively fast or excessively slow unfolding, thereby effectively reducing the impact force on the neck and chest to a certain extent, reducing the risk of injury to the driver.

[0068] FMVSS208 is a federal motor vehicle safety standard developed by the National Highway Traffic Safety Administration of the United States. Its full name is Federal Motor Vehicle Safety Standards No. 208, or "Occupant Collision Protection". The main purpose of this standard is to reduce the number of deaths and severity of injuries of vehicle occupants in collisions by stipulating collision safety requirements and equipment requirements for restraint systems, thereby improving the safety of vehicle occupants.

[0069] like Figure 4 As shown in the figure, it is a schematic diagram of the inflation state of the airbag in the prior art. When the vehicle collides, the airbag has a greater impact force on the neck and chest, causing greater physical damage to the occupants and failing to meet the requirements of FMVSS208.

[0070] like Figure 5 and Figure 6 As shown in the figure, this figure is a schematic diagram of the inflated state of the airbag provided in an exemplary embodiment of the present disclosure. When the vehicle collides, the airbag will not impact the neck, and the impact force on the chest is small, resulting in less physical damage to the occupant, thereby meeting the requirements of FMVSS208.

[0071] Optionally, the folding portion 20 includes a first folding portion 21, which is disposed at one end of the folding airbag 1 and is adapted to extend into the upper portion of the steering wheel. This enables the folding portion 20 to more quickly penetrate into the upper portion of the steering wheel when unfolded, thereby providing more effective protection for the driver.

[0072] Optionally, the virtual circle where the folded airbag 1 is located is divided into a first area 31, a second area 32, a third area 33 and a fourth area 34 of equal area by a virtual cross line passing through the folded airbag 1, and the first folded portion 21 is located in the first area 31 and the second area 32. In this way, the first folded portion 21 can drill into the upper part of the steering wheel more quickly when unfolded, providing more effective protection for the driver.

[0073] Optionally, the virtual cross line 40 includes a first center line 41 separating the first area 31 and the third area 33 and a second center line 42 separating the third area 33 and the fourth area 34, and the first folding portion 21 is symmetrical about the second center line 42. In this way, the first folding portion 21 can drill into the upper part of the steering wheel more quickly when unfolded, providing more effective protection for the driver.

[0074] Optionally, a first folding line 51 and an exhaust hole are provided in the first area 31 and the second area 32, and the first folding line 51 is used to make the folded first folded portion 21 include an exhaust hole 90. In this way, the exhaust hole 90 can be prevented from directly facing the driver's face during the opening process of the folded airbag 1, thereby preventing the high-temperature and high-pressure gas ejected from the exhaust hole 90 from directly contacting the driver's face and causing damage to the driver's face.

[0075] Optionally, the first folding portion 21 is provided with at least one first pre-sewn line 52, and at least one first pre-sewn line 52 is parallel to the first folding line 51. The first pre-sewn line 52 is used to limit the top of the folding airbag 1 from unfolding, so that the upper part of the folding airbag 1 has a tendency to move backward when inflated and unfolded, and cooperates with the steering wheel structure to reduce the pressure on the occupant's head. In the present application, the first pre-sewn line 52 passes through the first folding portion 21 and the unfolded area in sequence, so the first pre-sewn line 52 passes through two first layers and two second layers, a total of four layers.

[0076] Optionally, the distance between at least one first pre-sewn line 52 and the first folding line 51 is greater than 20 mm. This arrangement not only facilitates the production of the first pre-sewn line 52, but also reduces the production cost of the product.

[0077] Optionally, the first folding portion 21 is provided with a plurality of first pre-sewn lines 52, and the interval between two adjacent first pre-sewn lines 52 is 15mm-25mm. This arrangement not only facilitates the production of the first pre-sewn lines 52, but also reduces the production cost of the product.

[0078] Optionally, the first folding portion 21 is provided with at least one second pre-sewn line 62, and the second pre-sewn line 62 is symmetrically arranged about the second center line 42. The first pre-sewn line 52 and the second pre-sewn line 62 jointly limit the top of the foldable airbag 1 from unfolding, so that the upper part of the foldable airbag 1 tends to move backward when inflated and unfolded, and the steering wheel structure can reduce the pressure on the occupant's head.

[0079] Optionally, the extension lengths of at least two second pre-sewn lines 62 are unequal. This arrangement not only facilitates the production of the second pre-sewn lines 62, but also reduces the production cost of the product.

[0080] Optionally, the closest distance between at least one second pre-sewn line 62 and the periphery of the first folded portion 21 is greater than 20 mm. This arrangement not only facilitates the production of the second pre-sewn line 62, but also reduces the production cost of the product.

[0081] Optionally, the first folding portion 21 is provided with a plurality of second pre-stitched lines 62, and the interval between two adjacent second pre-stitched lines 62 is 5 mm-10 mm. This arrangement not only facilitates the production of the second pre-stitched lines 62, but also reduces the production cost of the product. In the present application, the second pre-stitched lines 62 sequentially pass through the first folding portion 21 and the unfolded area, so the second pre-stitched lines 62 pass through two first layers and two second layers, a total of four layers.

[0082] Since the portion sewn by the second pre-stitched lines 62 will open before the portion sewn by the first pre-stitched lines 52, in order to ensure that the folding airbag 1 is unfolded according to the designed shape, the intervals between the multiple second pre-stitched lines 62 are smaller than the intervals between the multiple first pre-stitched lines 52, so that the portion sewn by the second pre-stitched lines 62 requires a greater force to open than the portion sewn by the first pre-stitched lines 52, thereby ensuring the normal operation of the folding airbag 1.

[0083] Optionally, the main body 10 is provided with at least one main body pre-sewn line 81, and the main body 10 has a first layer and a second layer opposite to each other, and the first layer is fixedly connected to the second layer by at least one main body pre-sewn line 81. This arrangement not only facilitates the production of the main body pre-sewn line 81, but also reduces the production cost of the product.

[0084] In the present application, the folded air bag 1 comprises a double-layer structure of a first layer and a second layer after being laid flat, and the main body pre-sewn line 81 is penetrated and connected with the first layer and the second layer to improve the fixing effect.

[0085] Optionally, the virtual circle where the folded airbag 1 is located is divided into a first area 31, a second area 32, a third area 33 and a fourth area 34 of equal area by a virtual cross line 40 passing through the folded airbag 1; wherein at least one main body pre-sewn line 81 is located in the third area 33 and the fourth area 34. This arrangement not only facilitates the production of the main body pre-sewn line 81, but also reduces the production cost of the product.

[0086] Optionally, the virtual cross line 40 includes a second center line 42, and at least one main body pre-sewn line 81 is symmetrical about the second center line 42. This arrangement not only facilitates the production of the main body pre-sewn line 81, but also reduces the production cost of the product.

[0087] Optionally, the main body 10 is provided with a plurality of main body pre-sewn lines 81, and the spacing between two adjacent main body pre-sewn lines 81 is between 5-15 mm. This arrangement not only facilitates the production of the main body pre-sewn lines 81, but also reduces the production cost of the product.

[0088] Optionally, the extension length of the main body pre-sewn line 81 is 180mm-220mm. This arrangement not only facilitates the production of the main body pre-sewn line 81, but also reduces the production cost of the product.

[0089] Optionally, the distance between at least one main body pre-sewn line 81 and the first center line 41 is 92.5 mm-132.5 mm. This arrangement not only facilitates the production of the main body pre-sewn line 81, but also reduces the production cost of the product.

[0090] Optionally, the folding airbag 1 further includes a drawstring, which is disposed between the first layer and the second layer, and the drawstring is fixedly connected to the first layer and the second layer through at least one main pre-sewn line 81 and at least one second pre-sewn line 62. In this way, when the folding airbag 1 is detonated, the drawstring can work normally, thereby satisfying the normal use of the folding airbag 1.

[0091] Optionally, the plurality of folding portions 20 include a second folding portion 22 and a third folding portion 24, wherein a portion of the third folding portion 24 covers a portion of the second folding portion 22. This enables the folding portion 20 to drill into the upper portion of the steering wheel more quickly when unfolded, providing more effective protection for the driver.

[0092] Optionally, the virtual circle where the folded airbag 1 is located is divided into a first area 31, a second area 32, a third area 33 and a fourth area 34 of equal area by a virtual cross line 40 passing through the folded airbag 1; wherein the second folded portion 22 is located in the first area 31. In this way, the second folded portion 22 can drill into the upper part of the steering wheel more quickly when unfolded, providing more effective protection for the driver.

[0093] Optionally, the virtual cross line 40 includes a first center line 41 separating the first area 31 and the third area 33 and a second center line 42 separating the third area 33 and the fourth area 34. A second folding line 61 is provided in the first area 31. One of the endpoints of the second folding line 61 is the intersection of the first center line 41 and the first area 31. The other endpoint of the second folding line 61 is located on the virtual circle, and the distance between the other endpoint of the second folding line 61 and the second center line 42 is 42.5 mm-82.5 mm. In this way, the second folding portion 22 can be more quickly drilled into the upper part of the steering wheel when unfolded, providing more effective protection for the driver.

[0094] Optionally, the second folding portion 22 is provided with at least one third pre-sewn line 72, and the at least one third pre-sewn line 72 is parallel to the second folding line 61. This arrangement not only facilitates the production of the third pre-sewn line 72, but also reduces the production cost of the product.

[0095] Optionally, the distance between at least one third pre-sewn line 72 and the second folding line 61 is 10 mm to 50 mm. This arrangement not only facilitates the production of the third pre-sewn line 72, but also reduces the production cost of the product.

[0096] Optionally, the extension length of the third pre-sewn line 72 is 50 mm-90 mm. This arrangement not only facilitates the production of the third pre-sewn line 72, but also reduces the production cost of the product.

[0097] Optionally, the center line of the third folded portion 24 overlaps the second center line 42. This arrangement not only facilitates the production of the fourth pre-sewn line 75, but also reduces the production cost of the product.

[0098] Optionally, the third folding portion 24 is provided with a third folding line 74, and the distance between the third folding line 74 and the first center line 41 is 90 mm-120 mm. This arrangement not only facilitates the production of the fourth pre-sewn line 75, but also reduces the production cost of the product.

[0099] Optionally, the third folding portion 24 is provided with a fourth pre-sewn line 75, and the fourth pre-sewn line 75 is symmetrically arranged about the midline of the third folding portion 24. Such an arrangement not only facilitates the production of the fourth pre-sewn line 75, but also reduces the production cost of the product.

[0100] Optionally, the third folding portion 24 is provided with a plurality of fourth pre-sewn lines 75, and the interval between two adjacent fourth pre-sewn lines 75 is 5 mm-15 mm. This arrangement not only facilitates the production of the fourth pre-sewn lines 75, but also reduces the production cost of the product.

[0101] Optionally, the extension length of the fourth pre-sewn line 75 is 40 mm to 80 mm. This arrangement not only facilitates the production of the fourth pre-sewn line 75, but also reduces the production cost of the product.

[0102] Optionally, the distance between at least one fourth pre-sewn line 75 and the top of the third folded portion 24 is 20 mm-60 mm. This arrangement not only facilitates the production of the fourth pre-sewn line 75, but also reduces the production cost of the product.

[0103] Optionally, the third folding portion 24 is provided with a fifth pre-sewn line 76, and the fifth pre-sewn line 76 is symmetrically arranged about the midline of the third folding portion 24. Such an arrangement not only facilitates the production of the fifth pre-sewn line 76, but also reduces the production cost of the product.

[0104] Optionally, the extension length of the fifth pre-sewn line 76 is 80 mm-120 mm. This arrangement not only facilitates the production of the fifth pre-sewn line 76, but also reduces the production cost of the product.

[0105] Optionally, the distance between the fifth pre-sewn line 76 and the third folding line 74 is 3 mm-7 mm. This arrangement not only facilitates the production of the fifth pre-sewn line 76, but also reduces the production cost of the product.

[0106] Optionally, the plurality of folding portions 20 include two second folding portions 22 as described above, and the two second folding portions 22 are located on opposite sides of the midline of the third folding portion 24. In this way, when the airbag is working, the folding portion 20 is easily inflated and unfolded, thereby effectively reducing the impact force on the neck and chest to a certain extent, and reducing the risk of injury to the driver.

[0107] According to a second aspect of the present application, there is provided an airbag folding method for forming a folded airbag 1, comprising:

[0108] S100: Provide initial air bag;

[0109] S200: folding the initial air bag at least once to form a main body portion 10 and at least one folded portion 20;

[0110] S300 : forming a pre-sewn line on at least one folded portion 20 .

[0111] Optionally, the step of folding the initial air bag at least once specifically includes:

[0112] S201 : folding the initial air bag to form a first folded portion 21 .

[0113] Optionally, the step of folding the initial air bag at least once further comprises:

[0114] S202 : Folding the initial air bag multiple times to form a main body portion 10 , a plurality of second folded portions 22 and a third folded portion 24 .

[0115] Optionally, the step of forming a pre-sewn line on at least one folding portion 20 specifically includes:

[0116] S301: forming a third pre-sewn line 72 on the second folded portion 22;

[0117] S302: forming a fourth pre-sewn line 75 and a fifth pre-sewn line 76 on the third folded portion 24;

[0118] S303 : forming a main body pre-sewn line 81 on the main body portion 10 .

[0119] According to a third aspect of the present application, a safety airbag assembly is provided, comprising a folded airbag 1, a generator corresponding to the folded airbag 1, and a housing for accommodating the folded airbag 1 and the generator.

[0120] According to a fourth aspect of the present application, a vehicle is provided, characterized in that it includes an airbag assembly.

[0121] In the folding airbag 1 of the embodiment of the present application, through the above-mentioned technical scheme, at least one folding portion 20 is provided, and at least one folding portion 20 is provided with a pre-stitched line, so that when the airbag is working, it is convenient to inflate and unfold the folding portion 20, and the provision of the pre-stitched line can also enable the folding portion 20 to expand outward more evenly when unfolding, avoiding the situation of local excessively fast or excessively slow unfolding, thereby effectively reducing the impact force on the neck and chest to a certain extent, reducing the risk of injury to the driver.

[0122] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0123] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0124] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0125] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0126] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0127] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A foldable air bag, characterized in that: include: Main body; At least one folding portion, bent and connected to the main body; Wherein, at least one of the folding parts is provided with a pre-sewn line, and at least one of the folding parts is fixedly connected to the main body part through the pre-sewn line.

2. The foldable air bag according to claim 1, characterized in that: The folding portion comprises a first folding portion, which is arranged at one end of the folding airbag and is suitable for extending into the upper part of the steering wheel.

3. The foldable air bag according to claim 1, characterized in that: The virtual circle where the folded airbag is located is divided into a first area, a second area, a third area and a fourth area with equal areas by a virtual cross line passing through the folded airbag, and the first folded portion is located in the first area and the second area.

4. The foldable air bag according to claim 3, characterized in that: The virtual cross line includes a first center line separating the first area and the third area and a second center line separating the third area and the fourth area, and the first folding portion is symmetrical about the second center line.

5. The foldable air bag according to claim 4, characterized in that: A first folding line and a vent hole are provided in the first region and the second region, and the first folding line is used to make the first folded portion include the vent hole after being folded.

6. The foldable air bag according to claim 5, characterized in that: The first folding portion is provided with at least one first pre-sewn line, and the at least one first pre-sewn line is parallel to the first folding line.

7. The foldable air bag according to claim 6, characterized in that: The distance between at least one of the first pre-sewn lines and the first folding line is greater than 20 mm.

8. The foldable air bag according to claim 6, characterized in that: The first folding portion is provided with a plurality of first pre-stitched lines, and the interval between two adjacent first pre-stitched lines is 15 mm-25 mm.

9. The foldable air bag according to claim 6, characterized in that: The first folding portion is provided with at least one second pre-sewn line, the first pre-sewn line is arranged close to the first folding line, and the second pre-sewn line is arranged away from the first folding line.

10. The foldable air bag according to claim 4, characterized in that: The second pre-sewn lines are arranged symmetrically about the second center line.

11. The foldable air bag according to claim 9, characterized in that: At least two of the second pre-stitched lines have unequal extension lengths.

12. The foldable air bag according to claim 9, characterized in that: The closest distance between at least one of the second pre-sewn lines and the periphery of the first folded portion is greater than 20 mm.

13. The foldable air bag according to claim 9, characterized in that: The first folding portion is provided with a plurality of second pre-stitched lines, and the interval between two adjacent second pre-stitched lines is 5 mm-10 mm.

14. The foldable air bag according to claim 1, characterized in that: The main body is provided with at least one main body pre-sewn thread, and the main body has a first layer and a second layer opposite to each other, and the first layer is fixedly connected to the second layer through at least one main body pre-sewn thread.

15. The foldable air bag according to claim 14, characterized in that: The virtual circle where the folding airbag is located is divided into a first area, a second area, a third area and a fourth area with equal areas by a virtual cross line passing through the folding airbag; wherein at least one of the main body pre-sewn lines is located in the third area and the fourth area.

16. The foldable air bag according to claim 15, characterized in that: The virtual cross line includes a first center line and a second center line, and at least one of the main body pre-sewing lines is symmetrical about the second center line.

17. The foldable air bag according to claim 15, characterized in that: The main body is provided with a plurality of main body pre-sewn lines, and the distance between two adjacent main body pre-sewn lines is between 5mm and 15mm.

18. The foldable air bag according to claim 15, characterized in that: The extension length of the main body pre-sewn thread is 180mm-220mm.

19. The foldable air bag according to claim 15, characterized in that: The distance between at least one of the main body pre-sewn lines and the first center line is 92.5mm-132.5mm.

20. The foldable air bag according to claim 14, characterized in that: The foldable airbag further comprises a drawstring, wherein the drawstring is arranged between the first layer and the second layer, and the drawstring is fixedly connected to the first layer and the second layer through at least one main body pre-sewn line and at least one second pre-sewn line.

21. The foldable air bag according to claim 1, characterized in that: The folding portion includes a second folding portion and a third folding portion, wherein a portion of the third folding portion covers a portion of the second folding portion, and the virtual circle where the folding airbag is located is divided into a first area, a second area, a third area and a fourth area with equal areas by a virtual cross line passing through the folding airbag; wherein the second folding portion is located in the first area or the second area, and the third folding portion is located in the first area and the second area.

22. The foldable air bag according to claim 21, characterized in that: The virtual cross line includes a first center line separating the first area and the third area and a second center line separating the third area and the fourth area. A second folding line is provided in the first area, one of the endpoints of the second folding line is one of the endpoints of the first center line, the other endpoint of the second folding line is located on the virtual circle, and the distance between the other endpoint of the second folding line and the second center line is 42.5mm-82.5mm.

23. The foldable air bag according to claim 22, characterized in that: The second folding portion is provided with at least one third pre-sewn line, and the at least one third pre-sewn line is parallel to the second folding line.

24. The foldable air bag according to claim 23, characterized in that: The distance between at least one of the third pre-sewn lines and the second folding line is 10mm-50mm.

25. The foldable air bag according to claim 23, characterized in that: The extension length of the third pre-stitched line is 50mm-90mm.

26. The foldable air bag according to claim 22, characterized in that: A center line of the third folded portion overlaps with the second center line.

27. The foldable air bag according to claim 22, characterized in that: The third folding portion is provided with a third folding line, and the distance between the third folding line and the first center line is 90mm-130mm.

28. The foldable air bag according to claim 27, characterized in that: The third folding portion is provided with a fourth pre-sewn line, and the fourth pre-sewn line is symmetrically arranged about the midline of the third folding portion.

29. The foldable air bag according to claim 28, characterized in that: The third folding portion is provided with a plurality of fourth pre-stitched lines, and the interval between two adjacent fourth pre-stitched lines is 5mm-15mm.

30. The foldable air bag according to claim 28, characterized in that: The extension length of the fourth pre-stitched line is 40mm-80mm.

31. The foldable air bag according to claim 28, characterized in that: The distance between at least one of the fourth pre-sewn lines and the top of the third folded portion is 20mm-60mm.

32. The foldable air bag according to claim 31, characterized in that: The third folding portion is provided with a fifth pre-sewn line, and the fifth pre-sewn line is symmetrically arranged about the midline of the third folding portion.

33. The foldable air bag according to claim 32, characterized in that: The extension length of the fifth pre-stitched line is 80mm-120mm.

34. The foldable air bag according to claim 32, characterized in that: The distance between the fifth pre-sewn line and the third folding line is 3mm-7mm.

35. The foldable air bag according to any one of claims 21 to 34, characterized in that: The second folding portions include two second folding portions, and the two second folding portions are located at opposite sides of the midline of the third folding portion.

36. An air bag folding method, characterized in that: For forming the folded air bag as described in any one of rights 1-35, comprising: Provide initial air bag; Folding the initial air bag at least once to form a main body portion and at least one folded portion; A pre-sewn line is formed on at least one of the folded portions.

37. The air bag folding method according to claim 36, characterized in that: The step of folding the initial air bag at least once specifically comprises: The initial air bag is folded to form a first fold.

38. The air bag folding method according to claim 37, characterized in that: The step of folding the initial air bag at least once also includes: The initial air bag is folded multiple times to form the main body portion, multiple second folded portions, and a third folded portion.

39. The air bag folding method according to claim 38, characterized in that: The step of forming the pre-sewn line on at least one of the folded portions specifically includes: forming a third pre-sewn line on the second folded portion; forming a fourth pre-sewn line and a fifth pre-sewn line on the third folded portion; A main body pre-sewn line is formed on the main body portion.

40. A safety airbag assembly, characterized in that: The invention comprises the folded air bag according to any one of claims 1 to 35, a generator corresponding to the folded air bag, and a shell for accommodating the folded air bag and the generator.

41. A vehicle, characterized in that: Including a folding air bag as described in any one of claims 1-35.

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