Airbag wrapping cloth

Abstract

The invention discloses air bag wrapping cloth which comprises a restraining structure, a first tearing line is arranged on the restraining structure, the restraining structure can wrap a folding bag when at least two ends of the restraining structure are fixed to an air generator, and when the air generator is ignited, the folding bag breaks through the first tearing line and is unfolded. The air bag wrapping cloth further comprises an isolation structure, the length of the isolation structure is larger than that of the restraining structure, and when the two ends of the isolation structure are fixed, the middle of the isolation structure is located in the unfolding direction of the folding bag after being folded or overlapped. After the folding bag breaks through the first tearing line, the middle of the isolation structure and the door cover tearing line, the middle of the isolation structure is broken or separated and unfolded, and at least parts of the two sides of the middle of the isolation structure are correspondingly located between the tearing line of the bag and the door cover and the door cover hinge. The air bag can be prevented from being scratched by the door cover, and the problem that in the prior art, single-layer wrapping cloth cannot wrap the folding air bag tightly and cannot prevent the air bag from being torn by the air bag door cover at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile passive safety devices, and in particular to an airbag wrapping cloth. Background Art

[0002] Before an airbag is folded and installed in a vehicle, it needs to be wrapped with airbag wrapping cloth to maintain the folded state. Therefore, existing airbag wrapping cloths typically have high tensile strength, allowing them to adhere tightly to the folded airbag when wrapped, thus maintaining a compact folded state.

[0003] In the existing technology, when the airbag is inflated and deployed at high speed, it may come into contact with the hinge of the airbag door cover, causing the risk of the airbag being scratched, which undoubtedly reduces the protection ability and stability of the airbag; in addition, although increasing the size of the wrapping cloth can prevent the airbag from being contacted by the hinge of the airbag door cover, it cannot tightly wrap the folded airbag.

[0004] Currently, there is no effective solution to the problem that the existing airbag wrapping cloth cannot simultaneously wrap the folded airbag tightly and prevent the airbag from being torn by the airbag door cover. Summary of the Invention

[0005] In view of this, an embodiment of the present invention provides an airbag wrapping cloth to at least solve the problem that the existing airbag wrapping cloth cannot simultaneously wrap the folded airbag tightly and prevent the airbag from being torn by the airbag door cover.

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

[0007] An embodiment of the present invention provides an airbag wrapping cloth, which is applied to an airbag device covered by a door cover. The airbag device includes a folded bag and a gas generator. The airbag wrapping cloth includes a restraining structure having a first tear line formed thereon. The restraining structure is capable of tightly wrapping the folded bag when at least two ends of the restraining structure are fixed to the gas generator. When the gas generator is detonated, the folded bag breaks through the first tear line and unfolds. The airbag wrapping cloth further includes:

[0008] an isolation structure, wherein the length of the isolation structure is greater than the length of the restraining structure, and when both ends of the isolation structure are fixed, the middle portion of the isolation structure is folded or overlapped and is located in the expansion direction of the foldable pouch;

[0009] Wherein, after the folded pouch breaks through the first tear line, the middle of the isolation structure and the door cover tear line, the middle of the isolation structure is broken or separated and unfolded, and at least parts of the two sides of the middle are correspondingly located between the tear lines of the pouch and the door cover and the door cover hinge.

[0010] Furthermore, both ends of the isolation structure are fixed to the gas generator, the door cover or the restraint structure, so that the isolation structure can be located on a side of the restraint structure close to or away from the folding bag.

[0011] Furthermore, the restraint structure includes a longitudinal portion, the longitudinal portion tightly wraps the folded bag along the front-to-rear direction of the vehicle, and the first tear line is provided on the longitudinal portion;

[0012] Wherein, the isolation structure is arranged along the front-rear direction of the vehicle.

[0013] Furthermore, the restraint structure further includes a transverse portion, which is located on both sides of the longitudinal portion and wraps the folded bag tightly along the left-right direction of the vehicle, and the first tear line extends between the transverse portion and the longitudinal portion.

[0014] Furthermore, the first tear line includes a transverse tear line and two longitudinal tear lines, the transverse tear line is provided on the longitudinal portion along the left-right direction of the vehicle, and the two longitudinal tear lines are provided between the longitudinal portion and the transverse portion along the front-rear direction of the vehicle;

[0015] Both ends of the longitudinal tear line may extend to the edge of the transverse portion or both ends of the longitudinal tear line may be located inside the edge of the transverse portion.

[0016] Furthermore, bolt holes are provided on both sides of the end of the longitudinal portion and on both sides of the end of the transverse portion, and the bolt holes are used to cooperate with bolts on the gas generator.

[0017] Furthermore, the ends of the longitudinal portion and the ends of the transverse portion are both provided with avoidance portions, and the bolt holes are located at two opposite sides of the avoidance portions.

[0018] Furthermore, one end of the longitudinal portion is provided with a mounting port and a plurality of mounting holes, the mounting holes are arranged around the mounting port, and bolt holes are provided on both sides of the other end of the longitudinal portion, and the mounting port is used to install the gas generator.

[0019] Furthermore, both ends of the longitudinal portion and both ends of the isolation structure are provided with anti-error marks, and the anti-error marks are used to align the ends of the longitudinal portion and the ends of the isolation structure.

[0020] Furthermore, the isolation structure further includes:

[0021] At least one pre-folding portion is provided on the isolation structure and is located outside the folded or overlapped portion of the isolation structure.

[0022] Furthermore, the pre-folded portion includes two grooves arranged on both sides of one end of the isolation structure, and the two grooves are arranged opposite to each other; or

[0023] The pre-folding portion includes two pre-folding seams that are oppositely arranged on both sides of one end of the isolation structure, and the two pre-folding seams are sewn between the isolation structure and the restraint structure or on the isolation structure.

[0024] Furthermore, the isolation structure further includes:

[0025] A fixing line is sewn between the isolation structure and the constraint structure and is located at both ends of the isolation structure and the constraint structure, and is used to fix the two ends of the isolation structure to the constraint structure.

[0026] Furthermore, the isolation structure further includes:

[0027] Pre-stitched lines are sewn on the folded or overlapping panels in the middle of the isolation structure, and pre-fix the overlapping or folded panels of the isolation structure together or fix the folded or overlapping panels of the isolation structure to the panels of the constraint structure, and the pre-stitched lines can be broken when the folded pouch is unfolded.

[0028] Furthermore, the isolation structure and the restraint structure are fabric cloth structures made of the same material.

[0029] Furthermore, the isolation structure is a single-piece structure, a second tear line is provided in the middle of the isolation structure, and after both ends of the isolation structure are fixed, the folded portion in the middle of the isolation structure and the second tear line are located in the unfolding direction of the folded pouch;

[0030] After the second tear line breaks, both sides of the middle portion of the isolation structure are located between the tear line between the bag and the door cover and the door cover hinge along with the unfolded folded bag.

[0031] Furthermore, the isolation structure includes an expandable first folding portion and / or a second folding portion, and the first folding portion and / or the second folding portion are both located on a side of the panel away from the door cover around the second tear line;

[0032] When the isolation structure includes the first folded portion or the second folded portion, the first folded portion or the second folded portion is located on one side of the second tear line; when the isolation structure wraps the first folded portion and the second folded portion, the first folded portion and the second folded portion are located on both sides of the second tear line.

[0033] Furthermore, the isolation structure is folded an even number of times.

[0034] Furthermore, the isolation structure includes two isolation parts, and the sum of the lengths of the two isolation parts is greater than the length of the constraint structure;

[0035] The middle parts of the two isolation parts are overlapped, and the non-overlapping ends of the two isolation parts are fixed.

[0036] Furthermore, the overlapping length of the two isolation parts ranges from 50 to 70 mm.

[0037] Compared with the prior art, the at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects:

[0038] The airbag wrapping cloth of the present invention uses a restraint structure to wrap the foldable bag so that the foldable bag maintains a folded shape for easy installation, and then uses an isolation structure to wrap the foldable bag so that when the foldable bag is unfolded, the movable ends on both sides of the middle are located between the tear line between the bag and the door cover and the door cover hinge to prevent the bag from being scratched by the door cover, thereby solving the problem in the prior art that a single layer of wrapping cloth cannot simultaneously wrap the folded airbag tightly and prevent the airbag from being torn by the airbag door cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 It is a schematic diagram of the structure of the door cover and various tear lines of the door cover;

[0041] Figure 2 This is a schematic diagram of an installation scenario in which the middle portion of the isolation structure of an airbag wrapping cloth overlaps according to an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of an installation scenario in which the middle portion of the isolation structure in an airbag wrapping cloth is folded according to an embodiment of the present invention;

[0043] Figure 4 A diagram illustrating the deployment structure of an airbag device, an airbag wrap, and a door cover according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic structural diagram of a restraining structure of an airbag wrapping cloth according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of a structure in which the longitudinal tear line does not reach the edge of the transverse portion in the restraint structure according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of a structure in which a longitudinal tear line reaches an edge of a transverse portion in a restraining structure according to an embodiment of the present invention;

[0047] Figure 8 A schematic diagram of a structure having a mounting opening in a restraining structure according to an embodiment of the present invention;

[0048] Figure 9 A folding flow chart (1) of an isolation structure of an airbag wrapping cloth according to an embodiment of the present invention;

[0049] Figure 10 This is a structural schematic diagram of an isolation structure having a pre-folded portion according to an embodiment of the present invention;

[0050] Figure 11 for Figure 10 A folded flow chart of the isolation structure in FIG;

[0051] Figure 12 for Figure 5 The constraint structure and Figure 9 Overlapping schematic diagram of the isolation structure;

[0052] Figure 13 for Figure 7 The constraint structure and Figure 11 Overlapping schematic diagram of the isolation structure;

[0053] Figure 14 for Figure 13 perspective drawing;

[0054] Figure 15 Exploded diagram of the two isolation parts and the restraint structure;

[0055] Figure 16 for Figure 15 Schematic overlay of the structures.

[0056] The accompanying drawings of the present invention are as follows:

[0057] 1. Airbag device; 11. Folding bag; 12. Gas generator; 2. Airbag wrapping cloth; 21. Constraint structure; 211. First tear line; 2111. Transverse tear line; 2112. Longitudinal tear line; 212. Longitudinal portion; 2121. Mounting port; 2122. Mounting hole; 213. Transverse portion; 214. Bolt hole; 215. Avoidance portion; 216. Error-proofing mark; 22. Isolation structure; 221. Second tear line; 222. Isolation portion; 223. Pre-folded portion; 2231. Groove; 224. Fixing line; 23. Pre-stitched line; 3. Door cover; 31. Door cover tear line. DETAILED DESCRIPTION

[0058] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0059] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0060] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0061] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0062] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0063] Existing airbag wrapping cloth has high tension and adheres tightly to the surface of the folded airbag, but its function is only to maintain the shape of the folded airbag. During the airbag deployment process, it can be scratched by the door hinge, thereby reducing the airbag's protective ability. While existing technology allows the wrapping cloth to be designed wider or longer, with the extended portion folded and pre-sewn, the pre-sewn seams must be kept relatively strong because the wrapping cloth needs to unfold and break during airbag deployment. Furthermore, if the pre-sewn seams are designed to be weak, the wrapping cloth will inevitably fail to tightly wrap the folded airbag, effectively preventing it from maintaining its shape after folding.

[0064] In view of this, the inventors conducted in-depth research and improvement exploration on the folding bag 11, the wrapping cloth, and the isolation sheet of the wrapping cloth, and found that: an isolation structure 22 can be added to the original wrapping cloth, and the isolation structure 22 can be designed to be wider or longer, and after folding, it is located in the unfolding direction of the folding bag 11, so that the folding bag 11 can be tightly wrapped and shaped with the original wrapping cloth, and the isolation structure 22 is used to isolate the bag and the door cover 3.

[0065] Based on this, this specification proposes a solution: Figures 1 to 4 As shown, an airbag wrapping cloth 2 of the present invention is wrapped around the folding bag 11 along the front-to-rear direction of the vehicle using a restraint structure 21, and the folding bag 11 is shaped, and then the middle folded or overlapping part of the isolation structure 22 with both ends fixed is set in the expansion direction or upper surface of the isolation structure 22, so that when the isolation structure 22 is disconnected from the middle under the action of the folding bag 11, the folded or overlapping part of the isolation structure 22 is expanded outward to between the bag and the hinge of the door cover 3 and the hinge of the door cover 3, solving the problem that the existing single-layer wrapping sheet cannot simultaneously take into account wrapping the folded airbag tightly and preventing the airbag from being torn by the airbag door cover 3.

[0066] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0067] In the present invention, the folding bag 11 is the shape of the airbag after folding. It can be folded in a fixed folding manner or in a disorderly folding manner. The folding bag 11 is generally cylindrical or cubical after folding.

[0068] This application describes the airbag wrapping cloth 2 in detail by taking the folded bag 11 as a rectangular parallelepiped structure.

[0069] Example 1

[0070] like Figures 1 to 16 As shown, an embodiment of the present invention provides an airbag wrapping cloth 2, which is applied to an airbag device 1 covered by a door cover 3. The airbag device 1 includes a folded bag 11 and a gas generator 12. The airbag wrapping cloth 2 includes a restraint structure 21. A first tear line 211 is provided on the restraint structure 21. When at least two ends of the restraint structure 21 are fixed to the gas generator 12, the folded bag 11 can be tightly wrapped. When the gas generator 12 is detonated, the folded bag 11 breaks through the first tear line 211 and unfolds.

[0071] Among them, the door cover 3 refers to a cover located on the vehicle dashboard or vehicle steering wheel, which is mainly used to cover the airbag device 1 and is provided with a door cover tear line 31. When the airbag is deployed, the impact on the door cover 3 causes the door cover 3 to be broken from the door cover tear line 31.

[0072] The door cover tear line 31 may be an H-shaped or U-shaped structure.

[0073] The gas generator 12 may be a pancake-shaped gas generator 12 , the gas outlet end of which is inserted into the folding bag 11 , and is used to release high-temperature and high-pressure gas to expand the folding bag 11 when ignited.

[0074] Among them, the restraint structure 21 is made of fabric material. For example, the restraint structure 21 is a cloth piece. When the airbag wrapping cloth 2 wraps the folded bag 11 and is installed on the vehicle, it wraps the folded bag 11 tightly at least along the front and rear direction of the vehicle.

[0075] In the description of this application, wrapping along the front-rear direction of the vehicle or wrapping along the left-right direction of the vehicle is based on the fact that the airbag wrapping cloth 2 wraps the folded airbag and is installed on the vehicle domestically.

[0076] The extending direction of the first tear line 211 may be the same as the extending direction of the door cover tear line 31. When the foldable bag 11 is unfolded, the first tear line 211 and the door cover tear line 31 are torn in sequence.

[0077] Furthermore, if Figures 5 to 16 As shown, the airbag wrapping cloth 2 also includes an isolation structure 22, the length of the isolation structure 22 is greater than the length of the restraint structure 21, and when the two ends of the isolation structure 22 are fixed, and the middle part of the isolation structure 22 is folded or overlapped and is located in the unfolding direction of the folded bag 11; wherein, after the folded bag 11 breaks through the first tear line 211, the middle part of the isolation structure 22 and the door cover tear line 31, the middle part of the isolation structure 22 is broken or separated and unfolded into a first panel and a second panel, and at least parts of the two sides of the middle (the first panel and the second panel) are correspondingly located between the tear lines of the bag and the door cover 3 and the hinge of the door cover 3.

[0078] The isolation structure 22 is also a cloth structure, and the isolation structure 22 and the constraint structure 21 are made of the same material.

[0079] The length of the isolation structure 22 and the length of the restraint structure 21 refer to their lengths along the front-rear direction of the vehicle when they are deployed.

[0080] The length difference between the isolation structure 22 and the restraint structure 21 is in the range of 50-70 mm.

[0081] The two ends of the isolation structure 22 being fixed means that the isolation structure 22 is fixed to at least one of the gas generator 12 , the door cover 3 or the restraint structure 21 .

[0082] Specifically, both ends of the isolation structure 22 are fixed to the door cover 3 or the gas generator 12 by bolts, or both ends are sewn to the restraint structure 21 .

[0083] When the isolation structure 22 is a single-piece structure, its total length is greater than the total length of the constraint structure 21, and its middle part needs to be folded, and a second tear line 221 is provided in the middle of the isolation structure 22 to facilitate the unfolding of the middle part of the isolation structure 22; when the isolation structure 22 is at least two-piece structure, the sum of its lengths is greater than the total length of the constraint structure 21, and at this time the middle part needs to be overlapped.

[0084] The portion of the isolation structure 22 that is longer than the restraint structure 21 is folded or overlapped and sewn with pre-sewn thread 23 .

[0085] The working principle of the airbag wrapping cloth 2 of the present invention is: when the gas generator 12 inflates the folded bag 11, the folded bag 11 tears the first tear line 211, the middle part of the isolation structure 22 and the door cover tear line 31 in sequence, so that the middle part of the isolation structure 22 is disconnected or separated, and then unfolded to both sides, so that the torn or separated ends on both sides of the middle part of the isolation structure 22 are correspondingly located between the bag and door cover tear line 31 and the door cover 3 hinge, so as to isolate the tearing points of the bag and the door cover 3.

[0086] Furthermore, the isolation structure 22 can be located on a side of the constraint structure 21 close to or away from the folding bag 11, and its position relative to the constraint structure 21 can be flexibly set according to the connection points at both ends of itself.

[0087] In some of these embodiments, Figure 5 As shown, the restraint structure 21 includes a longitudinal portion 212 , which wraps the folded bag 11 along the front-to-rear direction of the vehicle, and a first tear line 211 is provided on the longitudinal portion 212 ; wherein, the isolation structure 22 is provided along the front-to-rear direction of the vehicle.

[0088] When the restraint structure 21 is installed on the vehicle, the longitudinal portion 212 is in the front-rear direction of the vehicle and tightly wraps the folded bag 11 to shape the folded bag 11 .

[0089] The first tear line 211 is a weakened line or a longitudinal portion 212 , and a plurality of weak points or holes are provided along the first tear line 211 .

[0090] Furthermore, the restraint structure 21 also includes a transverse portion 213, which is located on both sides of the longitudinal portion 212 and tightly wraps the folding bag 11 along the left and right directions of the vehicle, and the first tear line 211 extends between the transverse portion 213 and the longitudinal portion 212. The transverse portion 213 is used to cooperate with the longitudinal portion 212 to wrap the folding bag 11 in all directions to shape the folding bag 11.

[0091] Among them, the constraint structure 21 formed by the transverse portion 213 and the longitudinal portion 212 is a cross-shaped structure as a whole, and the first tear line 211 is roughly an H-shaped structure as a whole. The two longitudinal edges of the first tear line 211 are located between the transverse portion 213 and the longitudinal portion 212, and the transverse edge is located in the middle of the isolation structure 22 so that the longitudinal portion 212 can be unfolded.

[0092] The two longitudinal sides of the first tear line 211 may be curves concave toward the transverse sides.

[0093] In some of these embodiments, Figures 6-7 As shown, the first tear line 211 includes a transverse tear line 2111 and two longitudinal tear lines 2112. The transverse tear line 2111 is arranged on the longitudinal portion 212 along the left-right direction of the vehicle, and the two longitudinal tear lines 2112 are arranged between the longitudinal portion 212 and the transverse portion 213 along the front-back direction of the vehicle; the two ends of the longitudinal tear line 2112 can extend to the edge of the transverse portion 213 or the two ends of the longitudinal tear line 2112 are located on the inner side of the edge of the transverse portion 213.

[0094] The first tear line 211 is an H-shaped structure as a whole, and its transverse tear line 2111 is a middle tear line, and the longitudinal tear lines 2112 are tear lines on both sides.

[0095] The deployment form or deployment posture of the restraint structure 21 can be adjusted by adjusting the length and extension position of the first tear line 211 .

[0096] For example, when both ends of the longitudinal tear line 2112 extend to the edge of the transverse portion 213, the transverse portion 213 of the constraint structure 21 is fully unfolded; when both ends of the longitudinal tear line 2112 extend to the inner side of the edge of the transverse portion 213, the transverse portion 213 of the constraint structure 21 is only unfolded in the middle part.

[0097] Furthermore, bolt holes 214 are provided on both sides of the end of the longitudinal portion 212 and on both sides of the end of the transverse portion 213 . The bolt holes 214 are used to cooperate with the bolts on the gas generator 12 for connection.

[0098] Specifically, after the longitudinal portion 212 and the transverse portion 213 are tightly wrapped around the folded bag 11 along a preset direction, the bolt holes 214 on both sides of the ends of the transverse portion 213 and the longitudinal portion 212 are connected with the bolts on the gas generator 12 through bolts.

[0099] In some embodiments, a mounting port and a corresponding bolt hole 214 for mounting the gas generator 12 are provided on one end of the longitudinal portion 212, and bolt holes 214 are provided on both sides of the other end to cooperate with the bolts on the gas generator 12 for connection.

[0100] Furthermore, the ends of the longitudinal portion 212 and the ends of the transverse portion 213 are both provided with avoidance portions 215 , and the bolt holes 214 are located on two opposite sides of the avoidance portions 215 to avoid the gas generator 12 or the folded bag 11 .

[0101] Specifically, when the bolts of the gas generator 12 are not located at the outermost edge of the gas generator 12 , the gas generator 12 can be avoided by the avoidance portion 215 so that the bolt hole 214 is connected to the gas generator 12 by the bolt.

[0102] In some of these embodiments, Figure 8 As shown, one end of the longitudinal portion 212 is provided with a mounting port 2121 and a plurality of mounting holes 2122 , and the mounting holes 2122 are arranged around the mounting port 2121 , and bolt holes 214 are provided on both sides of the other end of the longitudinal portion 212 , and the mounting port 2121 is used to install the gas generator 12 .

[0103] Among them, the air outlet end of the gas generator 12 is inserted into the mounting port 2121, and the bolts on the gas generator 12 are inserted into the mounting hole 2122. Finally, the other end of the longitudinal portion 212 wraps the folding bag 11 along the front and rear direction of the vehicle, and the two bolt holes 214 at the other end of the longitudinal portion 212 are connected to the bolts on the gas generator 12.

[0104] In some embodiments, both ends of the longitudinal portion 212 and both ends of the isolation structure 22 are provided with anti-error marks 216, which are used to align the ends of the longitudinal portion 212 and the ends of the isolation structure 22 to avoid reverse installation of the isolation structure 22.

[0105] The error-proofing mark 216 may be an error-proofing hole.

[0106] In some of these embodiments, Figure 10 As shown, the isolation structure 22 also includes a pre-folding portion 223, which is arranged on the isolation structure 22 and is located on the outside of the folded or overlapping portion of the isolation structure 22. The pre-folding portion 223 is used to avoid interference between the isolation structure 22 and the constraint structure 21 when the middle part of the isolation structure 22 is separated or broken and expanded outward.

[0107] Among them, after the isolation structure 22 is folded or turned over about the pre-folding portion 223, the isolation structure 22 can be flatter at the pre-folding portion 223, avoiding displacement or offset due to the interference of the constraint structure 21 when it is unfolded.

[0108] Two specific structures of the pre-folding portion 223 are provided as follows:

[0109] (1) The pre-folded portion 223 includes two grooves 2231 disposed on both sides of one end of the isolation structure 22, and the two grooves 2231 are disposed opposite to each other.

[0110] Among them, when the longitudinal tear line 2112 on the constraint structure 21 does not extend to the edge of the transverse part 213, if the middle part of the isolation structure 22 expands outward, the grooves 2231 set on both sides of one end of the isolation structure 22 can avoid the connection between the longitudinal part and the transverse part 213 in the constraint structure 21, thereby avoiding interference between the constraint structure 21 and the isolation structure 22, and at the same time making the isolation structure 22 expand more smoothly, avoiding the displacement of the constraint structure 21 after expansion.

[0111] (2) The pre-folded portion 223 includes two pre-folded seams arranged opposite to each other on both sides of one end of the isolation structure 22. The two pre-folded seams are sewn between the isolation structure 22 and the constraint structure 21 or are sewn separately on the isolation structure 22.

[0112] Among them, when the longitudinal tear line 2112 of the restraint structure 21 does not extend to the edge of the transverse part 213, if the middle part of the isolation structure 22 expands outward, it can provide stronger stress or resistance through the pre-folded seams at both ends to reduce the impact of the restraint structure 21 on the isolation structure 22.

[0113] Among them, the pre-folding portion 223 can also be set as other structures, such as a weakening line, etc. As long as it can reduce the interference effect of the constraint structure 21 on the isolation structure 22 and make the isolation structure 22 unfold more smoothly, it belongs to the protection scope of this application.

[0114] In some embodiments, the isolation structure 22 also includes a fixing line 224, which is sewn between the isolation structure 22 and the constraint structure 21 and located at both ends of the isolation structure 22 and the constraint structure 21, and is used to fix the two ends of the isolation structure 22 to the constraint structure 21.

[0115] The fixing lines 224 are used to fix the two ends of the isolation structure 22 to prevent the isolation structure 22 from being offset relative to the constraint structure 21 during assembly or use.

[0116] In some of the embodiments, the isolation structure 22 also includes a pre-stitch 23, which is sewn on the folded or overlapping panel in the middle of the isolation structure 22, and pre-fixes the overlapping or folded panels of the isolation structure 22 together or fixes the folded or overlapping panels of the isolation structure 22 to the panel of the constraint structure 21, and the pre-stitch 23 can be broken when the folded bag 11 is unfolded.

[0117] The pre-sewn thread 23 is used to fix the overlapping portion or the folded portion in the middle of the isolation structure 22 .

[0118] The pre-stitched thread 23 is used to comb the folded or overlapping parts in the middle of the isolation structure 22 to avoid disordered arrangement of the folded or overlapping parts in the middle of the isolation structure 22 or to avoid deformation or displacement of the middle of the isolation structure 22 during transportation.

[0119] The pre-sewn line 23 is a relatively low-strength sewing line that breaks after the gas generator 12 is detonated, so that the folded or overlapped portion in the middle of the isolation structure 22 can be unfolded.

[0120] The specific designs of the two isolation structures 22 are introduced as follows:

[0121] like Figures 6 to 14 As shown, the isolation structure 22 is a single-piece structure, and a second tear line 221 is provided in the middle of the isolation structure 22. After the two ends of the isolation structure 22 are fixed, the folded part in the middle of the isolation structure 22 and the second tear line 221 are located in the unfolding direction of the folding bag 11; after the second tear line 221 breaks, the two sides of the middle of the isolation structure 22 form a first panel and a second panel (panels on both sides of the middle) along with the unfolded folding bag 11, and the first panel and the second panel are located between the tear line of the bag and the door cover 3 and the hinge of the door cover 3.

[0122] Among them, the second tear line 221 and the door cover tear line 31 are set correspondingly. For example, when the door cover tear line 31 is set close to the front of the vehicle, the second tear line 221 is also close to the front of the vehicle, so that the first panel and the second panel formed after the two sides of the middle part of the isolation structure 22 are unfolded can adapt to the length of the unfolded part of the door cover 3.

[0123] The lengths of the first panel and the second panel are adjusted by the position of the second tear line 221 .

[0124] Among them, when the isolation structure 22 is a single-piece structure, its two ends can be aligned with the two ends of the longitudinal portion 212 of the constraint structure 21, and the middle part is folded, and after folding, the second tear line 221 is set to correspond to the door cover tear line 31 above and below.

[0125] Specifically, when the folded bag 11 is unfolded, the second tear line 221 is torn, and the two sides of the middle portion of the isolation structure 22 are unfolded outward along with the folded bag 11 and are located between the tear line between the bag and the door cover 3 and the hinge of the door cover 3.

[0126] Furthermore, the isolation structure 22 includes an expandable first folding portion and / or a second folding portion, and the first folding portion and / or the second folding portion are both located on a side of the panel away from the door cover 3 around the second tear line 221 .

[0127] Specifically, when the isolation structure 22 includes a first folded portion or a second folded portion, the first folded portion or the second folded portion is located on one side of the second tear line 221; when the isolation structure 22 wraps the first folded portion and the second folded portion, the first folded portion and the second folded portion are located on both sides of the second tear line 221.

[0128] Among them, due to the different positions of the second tear line 221, the folding parts of the isolation structure 22 are also different. For example, when the second tear line 221 and the door cover tear line 31 are both located close to the edge, only the first folding part or the second folding part is formed in the middle of the isolation structure 22; when the second tear line 221 is located in the middle position, the parts on both sides of the second tear line 221 are folded to form the first folding part and the second folding part at the same time.

[0129] Preferably, the isolation structure 22 is folded an even number of times to facilitate the expansion or folding of the isolation structure 22 .

[0130] like Figures 15-16 As shown, the isolation structure 22 is a two-piece separate structure, which includes two isolation parts 222, the sum of the lengths of the two isolation parts 222 is greater than the length of the constraint structure 21; the middle parts of the two isolation parts 222 are overlapped, and the non-overlapping ends of the two isolation parts 222 are fixed.

[0131] Among them, the isolation part 222 is divided into a fixed end and an expanded end. The fixed end is used to form the two ends of the isolation structure 22, which is fixed on the door cover 3, the gas generator 12 or the constraint structure 21; the expanded ends of the two isolation parts 222 are overlapped, and are used to follow the folding bag 11 to expand to isolate the folding bag 11 and the door cover 3.

[0132] A pre-sewn thread 23 is provided between the unfolded ends of the two isolation portions 222 , and the pre-sewn thread 23 is broken when the pouch is unfolded.

[0133] Specifically, when the foldable bag 11 is unfolded, both unfolding ends of the two isolation portions 222 follow the foldable bag 11 and unfold outward to isolate the unfolded bag from the door cover 3 .

[0134] Preferably, the overlapping length of the two isolation portions 222 is in the range of 50-70 mm.

[0135] In some embodiments, a surface of the isolation structure 22 facing the door cover 3 is provided with a coating, such as a silicone layer.

[0136] The airbag wrapping cloth 2 of the present invention, based on existing single-layer wrapping cloth, adds an extendable insulating structure 22. The central portion of the insulating structure 22 is weakened, i.e., a weakening structure, such as a tear line, is provided in the middle of the insulating structure 22. This allows the central portion of the insulating structure 22 to be expanded to both sides, and its expanded length can be adjusted according to actual needs. When expanded to both sides of the central portion of the insulating structure 22, it fully protects the integrity of the door cover 3 and the airbag panel, preventing direct contact between the airbag and the door cover 3, thus resolving the problem of traditional single-layer wrapping cloth incompletely covering the door cover 3 area. Furthermore, the insulating structure of the present invention is folded in an orderly manner and pre-sewn to the restraining structure 21, resulting in a relatively simple process.

[0137] In this specification, references to the same or similar parts between the various embodiments can be made to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0138] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An airbag wrapping cloth, applied to an airbag device covered by a door cover, the airbag device comprising a folded bag and a gas generator, the airbag wrapping cloth comprising a restraining structure, the restraining structure having a first tear line formed thereon, the restraining structure being capable of tightly wrapping the folded bag when at least two ends of the restraining structure are fixed to the gas generator, and the folded bag breaking through the first tear line and unfolding when the gas generator is detonated, characterized in that: The airbag wrapping cloth further comprises: an isolation structure, wherein the length of the isolation structure is greater than the length of the restraining structure, and when both ends of the isolation structure are fixed, the middle portion of the isolation structure is folded or overlapped and is located in the expansion direction of the foldable pouch; Wherein, after the folded pouch breaks through the first tear line, the middle of the isolation structure and the door cover tear line, the middle of the isolation structure is broken or separated and unfolded, and at least parts of the two sides of the middle are correspondingly located between the tear lines of the pouch and the door cover and the door cover hinge.

2. The airbag wrapping cloth according to claim 1, characterized in that: Both ends of the isolation structure are fixed to the gas generator, the door cover or the restraint structure, so that the isolation structure can be located on a side of the restraint structure close to or away from the folded bag.

3. The airbag wrapping cloth according to claim 1, characterized in that: The restraint structure includes a longitudinal portion, the longitudinal portion tightly wraps the folded bag along the front-to-rear direction of the vehicle, and the longitudinal portion is provided with the first tear line; Wherein, the isolation structure is arranged along the front-rear direction of the vehicle.

4. The airbag wrapping cloth according to claim 3, characterized in that: The restraint structure further includes a transverse portion, which is located on both sides of the longitudinal portion and tightly wraps the folded bag along the left-right direction of the vehicle, and the first tear line extends between the transverse portion and the longitudinal portion.

5. The airbag wrapping cloth according to claim 4, characterized in that: The first tear line includes a transverse tear line and two longitudinal tear lines, wherein the transverse tear line is provided on the longitudinal portion along the left-right direction of the vehicle, and the two longitudinal tear lines are provided between the longitudinal portion and the transverse portion along the front-rear direction of the vehicle; Both ends of the longitudinal tear line may extend to the edge of the transverse portion or both ends of the longitudinal tear line may be located inside the edge of the transverse portion.

6. The airbag wrapping cloth according to claim 4, characterized in that: Bolt holes are provided on both sides of the end of the longitudinal portion and on both sides of the end of the transverse portion. The bolt holes are used to cooperate with the bolts on the gas generator for connection.

7. The airbag wrapping cloth according to claim 6, characterized in that: The ends of the longitudinal portion and the ends of the transverse portion are both provided with avoidance portions, and the bolt holes are located at two opposite sides of the avoidance portions.

8. The airbag wrapping cloth according to claim 3, characterized in that: One end of the longitudinal portion is provided with a mounting opening and a plurality of mounting holes, the mounting holes are arranged around the mounting opening, and bolt holes are provided on both sides of the other end of the longitudinal portion, and the mounting opening is used to install the gas generator.

9. The airbag wrapping cloth according to claim 3, characterized in that: Both ends of the longitudinal portion and both ends of the isolation structure are provided with anti-error marks, and the anti-error marks are used to align the ends of the longitudinal portion and the ends of the isolation structure.

10. The airbag wrapping cloth according to claim 1, characterized in that: The isolation structure further includes: At least one pre-folding portion is provided on the isolation structure and is located outside the folded or overlapped portion of the isolation structure.

11. The airbag wrapping cloth according to claim 10, characterized in that: The pre-folding portion includes two grooves arranged on both sides of one end of the isolation structure, and the two grooves are arranged opposite to each other; or The pre-folding portion includes two pre-folding seams that are oppositely arranged on both sides of one end of the isolation structure, and the two pre-folding seams are sewn between the isolation structure and the restraint structure or on the isolation structure.

12. The airbag wrapping cloth according to claim 1, characterized in that: The isolation structure further includes: A fixing line is sewn between the isolation structure and the constraint structure and is located at both ends of the isolation structure and the constraint structure, and is used to fix the two ends of the isolation structure to the constraint structure.

13. The airbag wrapping cloth according to claim 1, characterized in that: The isolation structure further includes: Pre-stitched lines are sewn on the folded or overlapping panels in the middle of the isolation structure, and pre-fix the overlapping or folded panels of the isolation structure together or fix the folded or overlapping panels of the isolation structure to the panels of the constraint structure, and the pre-stitched lines can be broken when the folded pouch is unfolded.

14. The airbag wrapping cloth according to claim 1, characterized in that: The isolation structure and the restraint structure are fabric sheet structures made of the same material.

15. The airbag wrapping cloth according to any one of claims 1 to 14, characterized in that: The isolation structure is a single-piece structure, and a second tear line is provided in the middle of the isolation structure. After the two ends of the isolation structure are fixed, the folded portion in the middle of the isolation structure and the second tear line are located in the unfolding direction of the folded pouch; After the second tear line breaks, both sides of the middle portion of the isolation structure are located between the tear line between the bag and the door cover and the door cover hinge along with the unfolded folded bag.

16. The airbag wrapping cloth according to claim 15, characterized in that: The isolation structure comprises an expandable first folding portion and / or a second folding portion, wherein the first folding portion and / or the second folding portion are both located on a side of the panel away from the door cover around the second tear line; When the isolation structure includes the first folded portion or the second folded portion, the first folded portion or the second folded portion is located on one side of the second tear line; When the isolation structure wraps the first folded portion and the second folded portion, the first folded portion and the second folded portion are located on both sides of the second tear line.

17. The airbag wrapping cloth according to claim 16, characterized in that: The isolation structure has an even number of folding times.

18. The airbag wrapping cloth according to any one of claims 1 to 14, characterized in that: The isolation structure includes two isolation parts, and the sum of the lengths of the two isolation parts is greater than the length of the constraint structure; The middle parts of the two isolation parts are overlapped, and the non-overlapping ends of the two isolation parts are fixed.

19. The airbag wrapping cloth according to claim 18, characterized in that: The overlapping length of the two isolation parts ranges from 50 to 70 mm.

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