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 folding parts are 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 unfolding reliability of the folding air bag is improved.

Description

Technical Field

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

[0002] At present, the existing airbags use manual folding steps such as Z-folding and roll-folding, which reduces the overall efficiency of airbag packaging and cannot ensure the controllable size accuracy of the airbag before extrusion. It is difficult to ensure the reliability of the airbag drilling into the upper part of the steering wheel during operation, and the safety of the occupants cannot be guaranteed. 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 improve the deployment reliability of the foldable 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; a plurality of folding parts, which are bent and connected to the main body; wherein at least one folding part is provided with a pre-sewn line, and at least one folding part is fixedly connected to the main body through the pre-sewn line.

[0005] Optionally, a plurality of folded portions are provided at one end of the folded airbag and are adapted to extend into an upper portion of a steering wheel.

[0006] Optionally, the plurality of folded portions include a first folded portion and a second folded portion, wherein a portion of the second folded portion covers a portion of the first folded portion.

[0007] 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 the first folded portion is located in the first area.

[0008] 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 first folding line is provided in the first area, one of the endpoints of the first folding line is the intersection of the first center line and the first area, the other endpoint of the first folding line is located on the virtual circle, and the distance between the other endpoint of the first folding line and the second center line is 42.5mm-82.5mm.

[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 10mm-50mm.

[0011] Optionally, the extension length of the first pre-stitched line is 50 mm-90 mm.

[0012] Optionally, the plurality of folded portions include two first folded portions as described above, and the two first folded portions are located on opposite sides of a midline of the second folded portion.

[0013] Optionally, the two first folded portions are symmetrical about a midline of the second folded portion.

[0014] Optionally, the contour lines of the two first folded portions are spaced apart from each other.

[0015] 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 the second folded portion is located in the first area and the second area.

[0016] Optionally, a midline of the second fold overlaps the second centerline.

[0017] Optionally, the second folding portion is provided with a second folding line, and the distance between the second folding line and the first center line is 90mm-130mm.

[0018] Optionally, the second folding portion is provided with a second pre-sewn line, and the second pre-sewn line is symmetrically arranged about the midline of the second folding portion.

[0019] Optionally, the second 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-15 mm.

[0020] Optionally, the extension length of the second pre-stitched line is 40 mm-80 mm.

[0021] Optionally, the distance between at least one second pre-sewn line and the top of the second folded portion is 20 mm-60 mm.

[0022] Optionally, the second folding portion is provided with a third pre-sewn line, and the third pre-sewn line is symmetrically arranged about the midline of the second folding portion.

[0023] Optionally, the extension length of the third pre-stitch is 80mm-120mm.

[0024] Optionally, the distance between the third pre-sewn line and the second folding line is 3mm-7mm.

[0025] 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.

[0026] 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.

[0027] Optionally, the virtual cross line includes a second center line, and at least one main body pre-sewing line is symmetrical about the second center line.

[0028] 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.

[0029] Optionally, the extension length of the main body pre-stitch is 180mm-220mm.

[0030] Optionally, the distance between at least one main pre-sewn line and the first center line is 92.5mm-132.mm.

[0031] 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 multiple times to form a main body and multiple folded parts; and forming a pre-sewn line on at least one folded part.

[0032] Optionally, the step of folding the initial air bag multiple times specifically includes:

[0033] The initial air bag is folded multiple times to form a main body portion, a plurality of first folded portions, and a second folded portion.

[0034] Optionally, the step of forming a pre-sewn line on at least one folded portion specifically includes:

[0035] forming a first pre-sewn line on the first folded portion;

[0036] forming a second pre-sewn line and a third pre-sewn line on the second folded portion;

[0037] A main body pre-sewn line is formed on the main body portion.

[0038] 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.

[0039] According to a fourth aspect of the present application, a vehicle is provided, characterized in that it includes an airbag assembly.

[0040] In the folding airbag of the embodiment of the present application, a plurality of folding parts are provided through the above-mentioned technical scheme, and at least one folding part is provided with a pre-stitched line. In this way, when the airbag is working, the provision of the pre-stitched line can make the unfolding of the folding part more precise, thereby improving the reliability of the folding part drilling into the upper part of the steering wheel after unfolding, providing more effective protection for the driver, and can effectively reduce the impact force on the neck and chest to a certain extent, reducing the risk of injury to the driver.

[0041] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] 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.

[0044] Figure 1 is a schematic diagram of an overall structure of a foldable air bag provided in an exemplary embodiment of the present disclosure;

[0045] Figure 2 is another overall structural schematic diagram of a foldable air bag provided in an exemplary embodiment of the present disclosure;

[0046] Figure 3 It is a schematic diagram of the inflation state of the prior art air bag;

[0047] Figure 4 is a schematic diagram of an air bag inflated state provided in an exemplary embodiment of the present disclosure;

[0048] Figure 5 is a schematic flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure;

[0049] Figure 6 is a schematic flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure;

[0050] Figure 7 Schematic diagram of a flow chart of an airbag folding method provided in an exemplary embodiment of the present disclosure.

[0051] Description of reference numerals:

[0052] Folding air bag 1, main body 10, folding portion 20, first folding portion 21, second folding portion 23, 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 71, second pre-stitched line 72, third pre-stitched line 73, main body pre-stitched line 81, exhaust hole 90. DETAILED DESCRIPTION

[0053] 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.

[0054] like Figures 1 to 7 As shown, in order to achieve the above-mentioned purpose, according to the first aspect of the present application, a foldable airbag 1 is provided, comprising: a main body 10; a plurality of folding parts 20, which are bent and connected to the main body 10; wherein at least one folding part 20 is provided with a pre-sewn line, and at least one folding part 20 is fixedly connected to the main body 10 by the pre-sewn line.

[0055] In the folding airbag 1 of the embodiment of the present application, through the above-mentioned technical scheme, a plurality of folding parts 20 are provided, and at least one folding part 20 is provided with a pre-stitched line, so that when the airbag is working, it is convenient to inflate and unfold the folding part 20, and the provision of the pre-stitched line can also make the unfolding of the folding part 20 more precise, thereby improving the reliability of the folding part 20 drilling into the upper part of the steering wheel after unfolding, and providing more effective protection for the driver. When the folding part 20 drills into the upper part of the steering wheel after unfolding, since the upper part of the steering wheel faces the driver's neck, the airbag can be used to protect the driver's neck, effectively reducing the Nig value, and can effectively reduce the impact force on the neck and chest to a certain extent, reducing the risk of injury to the driver.

[0056] 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.

[0057] like Figure 3 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.

[0058] like Figure 4 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.

[0059] Optionally, a plurality of folding portions 20 are provided at one end of the folding airbag 1 and are adapted to extend into the upper portion of the steering wheel, so that the folding portion 20 can be more quickly inserted into the upper portion of the steering wheel when unfolded, thereby providing more effective protection for the driver.

[0060] Optionally, the plurality of folding portions 20 include a first folding portion 21 and a second folding portion 23, wherein a portion of the second folding portion 23 covers a portion of the first folding portion 21. 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.

[0061] 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 first folded portion 21 is located in the first area 31. 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.

[0062] 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 first folding line 51 is provided in the first area 31. One of the endpoints of the first folding line 51 is the intersection of the first center line 41 and the first area 31. The other endpoint of the first folding line 51 is located on the virtual circle, and the distance between the other endpoint of the first folding line 51 and the second center line 42 is 42.5 mm-82.5 mm. In this way, the first folding portion 21 can be more quickly drilled into the upper part of the steering wheel when unfolded, providing more effective protection for the driver.

[0063] Optionally, the first folding portion 21 is provided with at least one first pre-sewn line 52, and the at least one first pre-sewn line 52 is parallel to the first folding line 51. This arrangement not only facilitates the production of the first pre-sewn line 52, but also reduces the production cost of the product.

[0064] Optionally, the distance between at least one first pre-sewn line 52 and the first folding line 51 is 10 mm to 50 mm. This arrangement not only facilitates the production of the first pre-sewn line 52, but also reduces the production cost of the product.

[0065] Optionally, the extension length of the first pre-sewn line 52 is 50 mm to 90 mm. This arrangement not only facilitates the production of the first pre-sewn line 52, but also reduces the production cost of the product.

[0066] Optionally, the first region is provided with an exhaust hole 90, and the first folding line is used to make the folded first folded portion have the exhaust hole 90. This can prevent the exhaust hole 90 from directly facing the driver's face during the unfolding 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.

[0067] Optionally, the plurality of folding portions 20 include two first folding portions 21 as described above, and the two first folding portions 21 are located on opposite sides of the midline of the second folding portion 23. 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.

[0068] Optionally, the two first folding portions 21 are symmetrical about the midline of the second folding portion 23. The above arrangement is simple, not only convenient for processing, but also improves the production efficiency of the device.

[0069] Optionally, the contour lines of the two first folding portions 21 are spaced apart from each other, so that the two first folding portions 21 will not interfere with each other, thereby ensuring the safety of the device when in use.

[0070] 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 23 is located in the first area 31 and the second area 32. In this way, the second folded portion 23 can drill into the upper part of the steering wheel more quickly when unfolded, providing more effective protection for the driver.

[0071] Optionally, the middle line of the second folded portion 23 overlaps the second center line 42. This arrangement not only facilitates the production of the second pre-sewn line 72, but also reduces the production cost of the product.

[0072] Optionally, the second folding portion 23 is provided with a second folding line 71, and the distance between the second folding line 71 and the first center line 41 is 90mm-130mm. This arrangement not only facilitates the production of the second pre-sewn line 72, but also reduces the production cost of the product.

[0073] Optionally, the second folding portion 23 is provided with a second pre-sewn line 72, and the second pre-sewn line 72 is symmetrically arranged about the midline of the second folding portion 23. Such an arrangement not only facilitates the production of the second pre-sewn line 72, but also reduces the production cost of the product.

[0074] Optionally, the second folding portion 23 is provided with a plurality of second pre-sewn lines 72, and the interval between two adjacent second pre-sewn lines 72 is 5 mm-15 mm. This arrangement not only facilitates the production of the second pre-sewn lines 72, but also reduces the production cost of the product.

[0075] Optionally, the extension length of the second pre-sewn line 72 is 40 mm to 80 mm. This arrangement not only facilitates the production of the second pre-sewn line 72, but also reduces the production cost of the product.

[0076] Optionally, the distance between at least one second pre-sewn line 72 and the top of the second folded portion 23 is 80 mm-120 mm. This arrangement not only facilitates the production of the second pre-sewn line 72, but also reduces the production cost of the product.

[0077] Optionally, the second folding portion 23 is provided with a third pre-sewn line 73, and the third pre-sewn line 73 is symmetrically arranged about the midline of the second folding portion 23. Such an arrangement not only facilitates the production of the third pre-sewn line 73, but also reduces the production cost of the product.

[0078] Optionally, the extension length of the third pre-sewn line 73 is 80 mm-120 mm. This arrangement not only facilitates the production of the third pre-sewn line 73, but also reduces the production cost of the product.

[0079] Optionally, the distance between the third pre-sewn line 73 and the second folding line 71 is 3 mm-7 mm. This arrangement not only facilitates the production of the third pre-sewn line 73, but also reduces the production cost of the product.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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 5mm and 15mm. This arrangement not only facilitates the production of the main body pre-sewn lines 81, but also reduces the production cost of the product.

[0084] 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.

[0085] Optionally, the distance between at least one main body pre-sewn line 81 and the first center line 41 is 92.5 mm-132 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.

[0086] According to a second aspect of the present application, there is provided an airbag folding method for forming a folded airbag 1, comprising:

[0087] S100: Provide initial air bag;

[0088] S200: folding the initial air bag multiple times to form a main body portion 10 and multiple folded portions 20;

[0089] S300 : forming a pre-sewn line on at least one folded portion 20 .

[0090] Optionally, the step of folding the initial air bag multiple times specifically includes:

[0091] S201 : Folding the initial air bag multiple times to form a main body portion 10 , a first folded portion 21 and a second folded portion 23 .

[0092] Optionally, the step of forming a pre-sewn line on at least one folding portion 20 specifically includes:

[0093] S301: forming a first pre-sewn line 52 on the first folded portion 21;

[0094] S302: forming a second pre-sewn line 72 and a third pre-sewn line 73 on the second folding portion 23;

[0095] S303 : forming a main body pre-sewn line 81 on the main body portion 10 .

[0096] 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.

[0097] According to a fourth aspect of the present application, a vehicle is provided, characterized in that it includes an airbag assembly.

[0098] In the folding airbag 1 of the embodiment of the present application, through the above-mentioned technical scheme, a plurality of folding parts 20 are provided, and at least one folding part 20 is provided with a pre-stitched line, so that when the airbag is working, it is convenient to inflate and unfold the folding part 20, and the provision of the pre-stitched line can also make the unfolding of the folding part 20 more precise, thereby improving the reliability of the folding part 20 drilling into the upper part of the steering wheel after unfolding, providing more effective protection for the driver, effectively reducing the Nig value, and can effectively reduce the impact force on the neck and chest to a certain extent, thereby reducing the risk of injury to the driver.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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; A plurality of folding parts, 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 airbag according to claim 1, characterized in that: A plurality of folding portions are arranged at one end of the folding airbag and are suitable for extending into the upper part of the steering wheel.

3. The foldable airbag according to claim 2, characterized in that: The multiple folding parts include a first folding part, 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; a first folding line is provided in the first area and / or the second area, and the first folding part is folded along the first folding line.

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 fourth area and a second center line separating the third area and the fourth area, one of the endpoints of the first folding line is an intersection of the first center line and the virtual circle, the other endpoint of the first folding line is located on the virtual circle, and the other endpoint of the first folding line is 42.5mm-82.5mm away from the second center line.

5. The foldable airbag according to claim 3, 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.

6. The foldable air bag according to claim 5, characterized in that: The distance between at least one of the first pre-sewn lines and the first folding line is 10mm-50mm.

7. The foldable air bag according to claim 5, characterized in that: The extension length of the first pre-stitched line is 50 mm-90 mm.

8. The foldable airbag according to any one of claims 3 to 7, characterized in that: An exhaust hole is provided in the first region, and the first folding line is used to make the first folded portion have the exhaust hole after being folded.

9. The foldable airbag according to any one of claims 3 to 7, characterized in that: The plurality of folded portions include two first folded portions, and the two first folded portions are respectively located on both sides of the second center line.

10. The foldable air bag according to claim 9, characterized in that: The two first folded portions are symmetrical about the second center line.

11. The foldable air bag according to claim 9, characterized in that: The contour lines of the two first folded portions are spaced apart from each other.

12. The foldable air bag according to claim 9, characterized in that: It also includes a second folded portion, a portion of which covers a portion of the first folded portion; wherein the second folded portion is located in the first area and the second area.

13. The foldable air bag according to claim 12, characterized in that: A midline of the second folded portion overlaps with the second center line.

14. The foldable air bag according to claim 12, characterized in that: The second folding portion is provided with a second folding line, and the distance between the second folding line and the first center line is 90mm-130mm.

15. The foldable air bag according to claim 12, characterized in that: The second folding portion is provided with a second pre-sewn line, and the second pre-sewn line is symmetrically arranged about the midline of the second folding portion.

16. The foldable air bag according to claim 15, characterized in that: The second 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-15 mm.

17. The foldable air bag according to claim 15, characterized in that: The extension length of the second pre-stitched line is 40 mm-80 mm.

18. The foldable air bag according to claim 15, characterized in that: The distance between at least one of the second pre-sewn lines and the top of the second folded portion is 20mm-60mm.

19. The foldable air bag according to claim 14, characterized in that: The second folding portion is provided with a third pre-sewn line, and the third pre-sewn line is symmetrically arranged about the midline of the second folding portion.

20. The foldable air bag according to claim 19, characterized in that: The extension length of the third pre-stitched line is 80mm-120mm.

21. The foldable air bag according to claim 19, characterized in that: The distance between the third pre-sewn line and the second folding line is 3mm-7mm.

22. 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.

23. The foldable air bag according to claim 22, 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.

24. The foldable air bag according to claim 23, 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.

25. The foldable air bag according to claim 23, 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.

26. The foldable air bag according to claim 23, characterized in that: The extension length of the main body pre-sewn thread is 180mm-220mm.

27. The foldable air bag according to claim 23, 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.

28. An air bag folding method, characterized in that: Used to form the folded air bag as described in any one of rights 1-27, comprising: Provides initial air bag; Folding the initial air bag multiple times to form a main body portion and multiple folded portions; A pre-sewn line is formed on at least one of the folded portions.

29. The air bag folding method according to claim 28, characterized in that: The step of folding the initial air bag multiple times specifically includes: The initial air bag is folded multiple times to form the main body portion, multiple first folded portions and a second folded portion.

30. The air bag folding method according to claim 29, characterized in that: The step of forming the pre-sewn line on at least one of the folded portions specifically includes: forming a first pre-sewn line on the first folded portion; forming a second pre-sewn line and a third pre-sewn line on the second folded portion; A main body pre-sewn line is formed on the main body portion.

31. A safety airbag assembly, characterized in that: The invention comprises the folded air bag according to any one of claims 1 to 27, a generator corresponding to the folded air bag, and a shell for accommodating the folded air bag and the generator.

32. A vehicle, characterized in that: Comprising an airbag assembly as claimed in claim 31.

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