Safety air bag device

Abstract

The utility model provides a safety air bag device, and relates to the technical field of automobile passive safety devices. The safety air bag device comprises an air bag and a restraining piece connected to the air bag, the air bag has an initial state, a middle state and an unfolded state in the inflation process, and the restraining piece is used for restraining at least part of the air bag in the process that the air bag is converted into the middle state from the initial state. And the restraint system is used for releasing restraint on the air bag in the process that the air bag is converted from the middle state to the unfolding state, so that the restrained part of the air bag is unfolded, the airbag device can control the unfolding sequence of the air bag, and then the protection performance of the air bag is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile passive safety devices, in particular to a safety airbag device. BACKGROUND

[0002] The safety airbag device is generally installed inside the automobile instrument panel, and needs to be fully inflated after detonation to prevent the passenger's head from colliding with the instrument panel to protect the passenger. The deployment sequence of the airbag affects the contact position of the airbag after inflation with the passenger, windshield, etc., and directly determines the protection performance of the airbag.

[0003] The existing safety airbag device does not control the deployment sequence of the airbag, which may cause impact on the passenger, windshield, etc. during the deployment process, and the protection performance of the airbag cannot be guaranteed. CONTENT OF THE INVENTION

[0004] The purpose of the present application includes, for example, providing a safety airbag device capable of controlling the deployment sequence of the airbag, thereby improving the protection performance of the airbag.

[0005] Embodiments of the present application can be implemented as follows:

[0006] The embodiments of the present application provide a safety airbag device, which comprises an airbag and a restraint connected to the airbag, the airbag has an initial state, an intermediate state and a deployed state during inflation, the restraint is used to restrain at least part of the airbag during the transition of the airbag from the initial state to the intermediate state, and to release the restraint of the airbag during the transition of the airbag from the intermediate state to the deployed state, so that the restrained part of the airbag is deployed.

[0007] Optionally, when the airbag is in the initial state, the restraint is provided with a connecting end connected to the airbag, and the connecting end can be disconnected from the airbag during the transition of the airbag from the intermediate state to the deployed state, so as to release the restraint of the airbag.

[0008] Optionally, the connecting end comprises a first connecting end and a second connecting end, the first connecting end and the second connecting end are two ends in the extension direction of the restraint, the first connecting end and the second connecting end are connected to the airbag, and at least one of the first connecting end and the second connecting end can be disconnected from the airbag during the transition of the airbag from the intermediate state to the deployed state.

[0009] Optionally, the airbag comprises a main body part and a folded part, the folded part being folded relative to the main body part when the airbag is in an initial state, the first connecting end and the second connecting end being connected to the main body part and the folded part respectively.

[0010] The first connecting end can be disconnected from the main body part during the transition of the airbag from the intermediate state to the deployed state, and / or the second connecting end can be disconnected from the folded part during the transition of the airbag from the intermediate state to the deployed state.

[0011] Optionally, the airbag device further comprises a gas generator, the gas generator being arranged on the main body part, the main body part being provided with a first connecting position and a second connecting position, the first connecting position being closer to the gas generator than the second connecting position, the first connecting end being connected to the first connecting position or the second connecting position.

[0012] Optionally, the main body part is internally provided with a retaining ring, the gas generator being fixed to the retaining ring, the retaining ring being provided with a stud, the stud partially extending out of the main body part, the first connecting end being hung on the stud, wherein the first connecting position is the position of the stud.

[0013] Optionally, the number of the constraint members is plural, the first connecting end of each of the constraint members being connected to the main body part, the second connecting end of each of the constraint members being connected to the folded part.

[0014] Optionally, the airbag comprises a main body part and a folded part, the folded part being folded relative to the main body part when the airbag is in an initial state, the first connecting end and the second connecting end being connected to the main body part;

[0015] The first connecting end and the second connecting end can be disconnected from the main body part during the transition of the airbag from the intermediate state to the deployed state.

[0016] Optionally, the airbag device further comprises a gas generator, the gas generator being arranged on the main body part, the main body part being provided with a third connecting position and a fourth connecting position, the third connecting position and the fourth connecting position being located on two sides of the gas generator, the first connecting end and the second connecting end being connected to the third connecting position and the fourth connecting position respectively.

[0017] Optionally, the constraint member comprises a plurality of constraint segments connected in sequence, the end portions of two constraint segments located on two sides being the first connecting end and the second connecting end respectively.

[0018] At least one of the first connecting end and the second connecting end can be disconnected from the airbag, and two adjacent constraint sections can be disconnected during the transition of the airbag from the intermediate state to the deployed state.

[0019] Optionally, the constraint member is provided with a weakening structure, and the constraint member can be disconnected at the weakening structure to release the constraint on the airbag during the transition of the airbag from the intermediate state to the deployed state.

[0020] Optionally, a plurality of through holes are arranged at intervals on the constraint member to form the weakening structure, or part of the constraint member is formed by thinning to form the weakening structure.

[0021] The safety airbag device provided by the embodiments of the present application has the following beneficial effects, for example: in order to control the deployment sequence of the airbag, a safety airbag device is designed, which comprises an airbag and a constraint member connected to the airbag. The airbag has an initial state, an intermediate state and a deployed state during inflation. The constraint member is used to constrain at least part of the airbag during the transition of the airbag from the initial state to the intermediate state, and to release the constraint on the airbag during the transition of the airbag from the intermediate state to the deployed state, so that the constrained part of the airbag can be normally deployed.

[0022] During the transition of the airbag from the initial state to the intermediate state, at least part of the airbag is constrained by the constraint member, and the remaining part of the airbag is normally deployed. During the transition of the airbag from the intermediate state to the deployed state, the constraint member releases the constraint on the airbag, and at this time the airbag can be completely deployed. By providing the constraint member, the deployment sequence of the airbag is controlled, the impact of the airbag deployment process is weakened, and the protection performance of the airbag is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Figure 1 First cross-sectional view of the safety airbag device when the airbag is in the initial state;

[0025] Figure 2 Second cross-sectional view of the safety airbag device when the airbag is in the initial state;

[0026] Figure 3 First cross-sectional view of the safety airbag device when the airbag is in the intermediate state;

[0027] Figure 4 First schematic view of the airbag device with the airbag in the intermediate state;

[0028] Figure 5 Schematic view of the first restraining member;

[0029] Figure 6 Schematic view of the second restraining member;

[0030] Figure 7 Second cross-sectional view of the airbag device with the airbag in the intermediate state;

[0031] Figure 8 Third cross-sectional view of the airbag device with the airbag transitioning from the intermediate state to the deployed state;

[0032] Figure 9 Third cross-sectional view of the airbag device with the airbag in the initial state;

[0033] Figure 10 Second schematic view of the airbag device with the airbag in the intermediate state;

[0034] Figure 11 Schematic view of the airbag in the first airbag device being restrained;

[0035] Figure 12 Schematic view of the airbag in the first airbag device being released from restraint;

[0036] Figure 13 Schematic view of the airbag in the first airbag device in the deployed state;

[0037] Figure 14 Schematic view of the airbag in the second airbag device being restrained;

[0038] Figure 15 Schematic view of the airbag in the second airbag device being released from restraint;

[0039] Figure 16 Schematic view of the airbag in the second airbag device in the deployed state.

[0040] Legend: 100 - airbag; 110 - body portion; 111 - first connection location; 112 - second connection location; 113 - third connection location; 114 - fourth connection location; 120 - folded portion; 200 - restraining member; 210 - first connection end; 220 - second connection end; 230 - first restraining segment; 240 - second restraining segment; 250 - hanging hole; 260 - weakening structure; 300 - housing; 400 - gas generator; 500 - retaining ring; 510 - stud; 600 - windscreen. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0046] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0047] As disclosed in the background section, existing airbag devices do not control the deployment sequence of the airbags, which may cause impacts on occupants, windshields, etc., during deployment, thus compromising the protective performance of the airbags. Embodiments of this application provide an airbag device that at least addresses this technical problem.

[0048] Please refer to Figures 1-5The airbag device provided by the embodiments of the present application comprises an airbag 100 and a restraint 200 connected to the airbag 100, the airbag 100 has an initial state, an intermediate state and a deployed state during inflation, the restraint 200 is used to restrain at least part of the airbag 100 during the transition of the airbag 100 from the initial state to the intermediate state, and is used to release the restraint on the airbag 100 during the transition of the airbag 100 from the intermediate state to the deployed state, so that the part of the airbag 100 restrained is deployed.

[0049] It should be noted that the airbag 100 is in the initial state before inflation, the airbag 100 is in the deployed state when inflation is completed, and the intermediate state is between the initial state and the deployed state. When the airbag 100 is between the initial state and the intermediate state, the restraint 200 can restrain at least part of the airbag 100, so that the part of the airbag 100 cannot be normally deployed. During the transition of the airbag 100 from the intermediate state to the deployed state, the restraint 200 releases the restraint on the airbag 100 due to the expansion of the airbag 100, so that the part of the airbag 100 restrained by the restraint 200 can be normally deployed.

[0050] When the airbag 100 is between the initial state and the intermediate state, at least part of the airbag 100 is restrained by the restraint 200 and cannot be temporarily deployed. If the part of the airbag 100 restrained is deployed towards the occupant or the windshield 600, the occupant or the windshield 600 is not easily impacted, and the remaining part of the airbag 100 is normally deployed. When the restraint 200 releases the restraint on the airbag 100, the airbag 100 is completely deployed from the intermediate state to the deployed state. By providing the restraint 200, the deployment sequence of the airbag 100 is controlled, the consistency of the deployment posture of the airbag 100 is improved, the impact during the deployment of the airbag 100 is weakened, and thus the protection performance of the airbag 100 can be improved.

[0051] In some embodiments, the restraint 200 is provided with a connecting end connected to the airbag 100, the connecting end can be disconnected from the airbag 100 during the transition of the airbag 100 from the intermediate state to the deployed state, so as to release the restraint on the airbag 100.

[0052] The restraint 200 is connected to the airbag 100 through the connecting end, and a certain restraint force is applied to the airbag 100. During the transition of the airbag 100 from the initial state to the intermediate state, at least part of the airbag 100 is restrained, so that the part of the airbag 100 cannot be normally deployed. During the transition of the airbag 100 from the intermediate state to the deployed state, the connecting end is disconnected from the airbag 100, and the restraint force is no longer applied to the airbag 100, so that the restraint on the airbag 100 is released.

[0053] In some optional embodiments, the connecting end comprises a first connecting end 210 and a second connecting end 220, the first connecting end 210 and the second connecting end 220 are respectively two ends of the restraint 200 in the extending direction, the first connecting end 210 and the second connecting end 220 are connected to the airbag 100, and at least one of the first connecting end 210 and the second connecting end 220 can be disconnected from the airbag 100 in the process of the airbag 100 changing from the intermediate state to the deployed state.

[0054] The restraint 200 can be long strip-shaped, the first connecting end 210 and the second connecting end 220 of the restraint 200 are respectively two ends in the extending direction of the restraint 200, and at least one of the first connecting end 210 and the second connecting end 220 can be disconnected from the airbag 100 in the process of the airbag 100 changing from the intermediate state to the deployed state, so as to release the restraint on the airbag 100, and the part of the airbag 100 that is restrained can be normally deployed.

[0055] The airbag device further comprises a housing 300, the housing 300 is fixed to the interior of the instrument panel of the whole vehicle through the assembly support; the airbag 100 is partially arranged in the housing 300, and the top of the housing 300 is further provided with a dust cover, and the dust cover is provided with an opening for the airbag 100 to extend out.

[0056] In some embodiments, the airbag 100 comprises a main body part 110 and a folded part 120 connected to each other, the folded part 120 is folded relative to the main body part 110 in the initial state of the airbag 100, and the first connecting end 210 and the second connecting end 220 are respectively connected to the main body part 110 and the folded part 120; the first connecting end 210 can be disconnected from the main body part 110 in the process of the airbag 100 changing from the intermediate state to the deployed state, and / or the second connecting end 220 can be disconnected from the folded part 120 in the process of the airbag 100 changing from the intermediate state to the deployed state.

[0057] Part of the main body part 110 is arranged in the housing 300, another part of the main body part 110 extends out of the housing 300, the folded part 120 is located outside the housing 300, and the folded part 120 is folded relative to the main body part 110 towards the bottom of the housing 300. The main body part 110 and the folded part 120 can be integrally formed or spliced together.

[0058] In the process that the airbag 100 is transformed from the initial state to the intermediate state, the part of the airbag 100 between the first connecting end 210 and the second connecting end 220 is constrained by the constraint 200 and cannot be expanded temporarily, since this part of the airbag 100 is mainly expanded towards the passenger, the passenger is not easily impacted; while the rest of the airbag 100 is normally expanded, when the airbag 100 is inflated to the state that at least one of the first connecting end 210 and the second connecting end 220 is disconnected from the airbag 100, the constraint 200 releases the constraint on the airbag 100, and the airbag 100 can be fully expanded from the intermediate state to the expanded state, by setting the constraint 200, the expansion sequence of the airbag 100 is controlled, the impact on the passenger in the expansion process of the airbag 100 is weakened, and the protection performance of the airbag 100 is improved.

[0059] In other embodiments, the first connecting end 210 can also be connected to components other than the airbag 100, for example, the first connecting end 210 is connected to the shell 300, or the first connecting end 210 is connected to components outside the airbag device.

[0060] Further, the airbag device further comprises a gas generator 400, the gas generator 400 is arranged on the main body 110, in the case that the airbag 100 is in the initial state, the part of the airbag 100 is rolled towards the side of the gas generator 400 to form the folding part 120.

[0061] The main body 110 is provided with a first connecting position 111 and a second connecting position 112, the first connecting position 111 is closer to the gas generator 400 than the second connecting position 112, and the first connecting end 210 is connected to the first connecting position 111 or the second connecting position 112.

[0062] It should be noted that the first connecting position 111 is located at the bottom of the main body 110 and close to one side of the folding part 120, and the second connecting position 112 is away from the gas generator 400 by a certain distance compared with the first connecting position 111, and the first connecting end 210 can be connected to the first connecting position 111 or the second connecting position 112 according to actual needs.

[0063] It should be noted that the first connecting position 111 and the second connecting position 112 are two straight line regions along the length direction of the shell 300 on the airbag 100 respectively, and the first connecting end 210 can be connected to any position on the straight line region, similarly, the position where the second connecting end 220 is connected to the folding part 120 is also a straight line region along the length direction of the shell 300, and the second connecting end 220 can be connected to any position on the straight line region.

[0064] In some embodiments, the inner portion of the main body 110 is provided with a retaining ring 500, the gas generator 400 is fixed to the retaining ring 500, the retaining ring 500 is provided with a stud 510, the stud 510 partially extends out of the main body 110, and the first connecting end 210 is hung on the stud 510, wherein the first connecting position 111 is the position of the stud 510.

[0065] The retaining ring 500 is located in the inner portion of the main body 110, the stud 510 on the retaining ring 500 partially extends out of the shell 300 through the bottom of the main body 110 and the shell 300, the first connecting end 210 is provided with a hanging hole 250, and the first connecting end 210 is hung on the stud 510 through the hanging hole 250. During the process that the air bag 100 changes from the intermediate state to the unfolded state, the first connecting end 210 can be separated from the stud 510, thereby disconnecting the main body 110.

[0066] In some embodiments, please refer to Figure 6 The constraint 200 is provided with a weakening structure 260, and during the process that the air bag 100 changes from the intermediate state to the unfolded state, the constraint 200 can be disconnected at the weakening structure 260 to release the constraint on the air bag 100.

[0067] The weakening structure 260 can be arranged at the middle portion of the constraint 200, and the constraint 200 is more likely to be disconnected at the weakening structure 260 than other portions of the constraint 200 during the inflation process of the air bag 100, thereby releasing the constraint on the air bag 100.

[0068] It should be noted that when the weakening structure 260 is arranged on the constraint 200, the connecting end on the constraint 200 can be stably connected with the air bag 100, and there is no need to design the connecting end to be disconnected with the air bag 100. Of course, in other optional embodiments, the constraint 200 can be disconnected at the weakening structure 260, and the connecting end thereof can also be disconnected with the air bag 100, thereby being able to release the constraint on the air bag 100 in multiple forms.

[0069] In some optional embodiments, a plurality of through holes are arranged at intervals on the constraint 200 to form the weakening structure 260; or, a portion of the constraint 200 is thinned to form the weakening structure 260.

[0070] By arranging a plurality of through holes at intervals on the constraint 200, the portion of the constraint 200 provided with the plurality of through holes forms the weakening structure 260, or a portion of the constraint 200 is thinned to form the weakening structure 260, and the thickness of the constraint 200 at the weakening structure 260 is less than the thickness of other portions of the constraint 200.

[0071] It can be understood that the weakening structure 260 is not limited to forming a plurality of through holes on the restraint 200 or thinning a portion of the restraint 200, as long as the restraint 200 can be broken at the weakening structure 260 to release the restraint on the airbag 100.

[0072] In some embodiments, referring to Figure 7 , Figure 8 The first connecting end 210 and the second connecting end 220 are both connected to the main body 110, and the first connecting end 210 and the second connecting end 220 can be disconnected from the main body 110 during the transition of the airbag 100 from the intermediate state to the deployed state.

[0073] In an optional embodiment, the restraint 200 is arranged around the folding portion 120 and part of the main body 110, and during the transition of the airbag 100 from the initial state to the intermediate state, the portion of the airbag 100 between the first connecting end 210 and the second connecting end 220 is restrained by the restraint 200 and cannot be deployed temporarily. Since this portion of the airbag 100 is mainly deployed towards the windshield 600, the windshield 600 is less likely to be impacted. The rest of the airbag 100 is normally deployed. When the airbag 100 is inflated to the point that at least one of the first connecting end 210 and the second connecting end 220 is disconnected from the airbag 100, the restraint 200 releases the restraint on the airbag 100, and the airbag 100 can be fully deployed from the intermediate state to the deployed state. By arranging the restraint 200, the deployment sequence of the airbag 100 is controlled, the impact of the airbag 100 on the windshield 600 during deployment is weakened, and the protection performance of the airbag 100 is improved.

[0074] Further, the main body 110 is provided with a third connecting position 113 and a fourth connecting position 114, the third connecting position 113 and the fourth connecting position 114 are located on both sides of the gas generator 400, and the first connecting end 210 and the second connecting end 220 are connected to the third connecting position 113 and the fourth connecting position 114, respectively.

[0075] The third connecting position 113 and the fourth connecting position 114 are located on the main body 110, and the third connecting position 113 and the fourth connecting position 114 are both close to the gas generator 400 and located on both sides of the gas generator 400 along the width direction of the housing 300. During the transition of the airbag 100 from the initial state to the intermediate state, the portion of the airbag 100 between the third connecting position 113 and the fourth connecting position 114 on the main body 110 is restrained by the restraint 200 and cannot be normally deployed temporarily, thereby playing a role in protecting the windshield 600.

[0076] In some alternative embodiments, the restraint 200 is cloth or rope, and the connection end of the restraint 200 and the airbag 100 can be fixed by sewing, bonding, hanging or laser welding, as long as the connection end of the restraint 200 and the airbag 100 can be disconnected.

[0077] In some embodiments, the restraint includes a plurality of restraint segments connected in sequence, and the ends of the two restraint segments on the two sides are the first connection end 210 and the second connection end 220, respectively. During the process of the airbag changing from the intermediate state to the deployed state, at least one of the first connection end 210 and the second connection end 220 can be disconnected from the airbag 100, and the adjacent two restraint segments can be disconnected.

[0078] It should be noted that the connection position between the restraint segments can be the end of the restraint segment, or the middle of the restraint segment, and the number of restraint segments can be determined according to actual needs. The restraint segment can be cloth or rope, and the restraint segments can be fixed by sewing, bonding, hanging or laser welding, as long as the restraint segments can be disconnected.

[0079] In an alternative embodiment, please refer to Figure 9 The restraint 200 includes a first restraint segment 230 and a second restraint segment 240, one end of the first restraint segment 230 and one end of the second restraint segment 240 are connected, the first connection end 210 is the end of the first restraint segment 230 away from the second restraint segment 240, and the second connection end 220 is the end of the second restraint segment 240 away from the first restraint segment 230.

[0080] In an alternative embodiment, the end of the first restraint segment 230 away from the second restraint segment 240 is connected to the first connection position 111, and the end of the second restraint segment 240 away from the first restraint segment 230 is connected to the folding portion 120. At this time, the first restraint segment 230 and the second restraint segment 240 jointly restrain the airbag 100 to weaken the impact on the occupant.

[0081] When the retaining ring 500 is provided with a stud 510, the end of the first restraint segment 230 away from the second restraint segment 240 is provided with a hanging hole 250, and the end of the first restraint segment 230 away from the second restraint segment 240 is hung on the stud 510 through the hanging hole 250. During the process of the airbag 100 changing from the intermediate state to the deployed state, the end of the first restraint segment 230 away from the second restraint segment 240 can be separated from the stud 510, so as to be disconnected from the airbag 100.

[0082] In other alternative embodiments, the first restraint section 230 is connected to the second connection location 112 at an end distal from the second restraint section 240, and the second restraint section 240 is connected to the folded portion 120 at an end distal from the first restraint section 230, such that the first restraint section 230 and the second restraint section 240 jointly restrain the airbag 100 to attenuate the impact on the occupant.

[0083] In other alternative embodiments, the first restraint section 230 is connected to the second connection location 112 at an end distal from the second restraint section 240, and the second restraint section 240 is connected to the folded portion 120 at an end distal from the first restraint section 230, such that the first restraint section 230 and the second restraint section 240 jointly restrain the airbag 100 to attenuate the impact on the occupant.

[0084] In other alternative embodiments, the first restraint section 230 is connected to the second connection location 112 at an end distal from the second restraint section 240, and the second restraint section 240 is connected to the folded portion 120 at an end distal from the first restraint section 230, such that the first restraint section 230 and the second restraint section 240 jointly restrain the airbag 100 to attenuate the impact on the occupant.

[0085] In some embodiments, the number of restraints 200 is plural, and the first connection end 210 and the second connection end 220 of each restraint 200 are connected to the main portion 110 and the folded portion 120, respectively.

[0086] In some embodiments, the number of restraints 200 is plural, and the first connection end 210 and the second connection end 220 of each restraint 200 are connected to the main portion 110 and the folded portion 120, respectively.

[0087] In an alternative embodiment, please refer to Figure 10 , the number of restraints 200 is two, and the first connection end 210 of each restraint 200 is connected to the first connection location 111, and the second connection end 220 of each restraint 200 is connected to the folded portion 120.

[0088] It can be understood that in other alternative embodiments, the first connection end 210 of one restraint 200 is connected to the first connection location 111, and the second connection end 220 is connected to the folded portion 120; the first connection end 210 of the other restraint 200 is connected to the second connection location 112, and the second connection end 220 is connected to the folded portion 120.

[0089] Please refer to Figures 11-13 , Figure 11The state that the part of the airbag 100 between the second connecting position 112 on the main body part 110 and the folding part 120 is limited by the limiting part 200 is shown, Figure 12 The state that the limiting part 200 releases the limitation on the airbag 100 is shown, Figure 13 The state that the airbag 100 is in the unfolded state is shown, and the arrow in the figure is the gas flow direction of the airbag 100 in the unfolding process.

[0090] Since the part of the airbag 100 limited by the limiting part 200 is mainly unfolded towards the passenger side, in the early stage of the unfolding of the airbag 100, the airbag 100 is unfolded towards the windshield 600 side first, and the passenger is not easily impacted; with the rising of the pressure inside the airbag 100, the connecting end is disconnected from the airbag 100, and the limiting part 200 releases the limitation on the airbag 100, at this time, the airbag 100 can be completely unfolded to the unfolded state.

[0091] Reference Figures 14-16 , Figure 14 The state that the part of the airbag 100 between the third connecting position 113 and the fourth connecting position 114 on the main body part 110 is limited by the limiting part 200 is shown, Figure 15 The state that the limiting part 200 releases the limitation on the airbag 100 is shown, Figure 16 The state that the airbag 100 is in the unfolded state is shown, and the arrow in the figure is the gas flow direction of the airbag 100 in the unfolding process.

[0092] Since the part of the airbag 100 limited by the limiting part 200 is mainly unfolded towards the windshield 600 side, in the early stage of the unfolding of the airbag 100, the windshield 600 is not easily impacted; with the rising of the pressure inside the airbag 100, the connecting end is disconnected from the airbag 100, and the limiting part 200 releases the limitation on the airbag 100, at this time, the airbag 100 can be completely unfolded to the unfolded state.

[0093] The working principle of the airbag device provided by the embodiment of the application at least includes: the part of the airbag 100 mainly unfolded towards the passenger side is limited by the limiting part 200, in the process that the airbag 100 is changed from the initial state to the unfolded state, the remaining part of the airbag 100 is unfolded first, then the limiting part 200 releases the limitation on the part of the airbag 100 unfolded towards the passenger side, the part of the airbag 100 unfolded towards the passenger side is unfolded later, the unfolding sequence of the airbag 100 is limited, and the protection on the passenger is achieved; the part of the airbag 100 mainly unfolded towards the windshield 600 side is limited by the limiting part 200, in the process that the airbag 100 is changed from the initial state to the unfolded state, the remaining part of the airbag 100 is unfolded first, then the limiting part 200 releases the limitation on the part of the airbag 100 unfolded towards the windshield 600 side, the part of the airbag 100 unfolded towards the windshield 600 side is unfolded later, the unfolding sequence of the airbag 100 is limited, and the protection on the windshield 600 is achieved.

[0094] The airbag device provided by the embodiments of the present application has at least the following beneficial effects: the deployment sequence of the airbag 100 is controlled by the restraint member 200 restraining the part of the airbag 100 between the connection position on the main body portion 110 and the folded portion 120, and the impact on the occupant during the deployment of the airbag 100 is reduced; the deployment sequence of the airbag 100 is controlled by the restraint member 200 restraining the part of the airbag 100 between the two connection positions on the main body portion 110, and the impact on the windshield 600 during the deployment of the airbag 100 is reduced; and the consistency of the deployment posture of the airbag 100 is improved after the deployment sequence of the airbag 100 is controlled by the restraint member 200, and the deployment process of the airbag 100 is more controllable.

[0095] In summary, the embodiments of the present application provide an airbag device, which includes an airbag 100 and a restraint member 200. During the process of the airbag 100 changing from an initial state to a deployed state, part of the airbag 100 is restrained by the restraint member 200 and cannot be deployed temporarily, while the rest of the airbag 100 is normally deployed. When at least one connection end of the restraint member 200 is disconnected from the airbag 100 or the restraint member 200 itself is disconnected at the weakened structure 260, the restraint member 200 releases the restraint on the airbag 100, until the airbag 100 is completely deployed to the deployed state. By arranging the restraint member 200, the deployment sequence of the airbag 100 is controlled, the impact during the deployment of the airbag 100 is reduced, and the protection performance of the airbag 100 is improved.

[0096] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An airbag device characterized by comprising: The safety airbag device comprises an airbag (100) and a restraint member (200) connected to the airbag (100), the airbag (100) has an initial state, an intermediate state and a deployed state during inflation, the restraint member (200) is used to restrain at least part of the airbag (100) during the transition of the airbag (100) from the initial state to the intermediate state, and is used to release the restraint of the airbag (100) during the transition of the airbag (100) from the intermediate state to the deployed state, so that the restrained part of the airbag (100) is deployed.

2. The airbag device according to claim 1, characterized by The restraint member (200) is provided with a connection end connected to the airbag (100), and the connection end can be disconnected from the airbag (100) during the transition of the airbag (100) from the intermediate state to the deployed state, so as to release the restraint of the airbag (100).

3. The airbag device according to claim 2, characterized by The connection end comprises a first connection end (210) and a second connection end (220), the first connection end (210) and the second connection end (220) are respectively two ends of the restraint member (200) in the extension direction, the first connection end (210) and the second connection end (220) are connected to the airbag (100), and at least one of the first connection end (210) and the second connection end (220) can be disconnected from the airbag (100) during the transition of the airbag (100) from the intermediate state to the deployed state.

4. The airbag device according to claim 3, characterized by The airbag (100) comprises a main body part (110) and a folding part (120) connected to each other, the folding part (120) is folded relative to the main body part (110) when the airbag (100) is in the initial state, the first connection end (210) and the second connection end (220) are connected to the main body part (110) and the folding part (120) respectively. The first connection end (210) can be disconnected from the main body part (110) during the transition of the airbag (100) from the intermediate state to the deployed state, and / or the second connection end (220) can be disconnected from the folding part (120) during the transition of the airbag (100) from the intermediate state to the deployed state.

5. The airbag device according to claim 4, characterized by The safety airbag device further comprises a gas generator (400), the gas generator (400) is arranged on the main body part (110), the main body part (110) is provided with a first connection position (111) and a second connection position (112), the first connection position (111) is closer to the gas generator (400) than the second connection position (112), and the first connection end (210) is connected to the first connection position (111) or the second connection position (112).

6. The airbag device according to claim 5, characterized by The inner part of the main body part (110) is provided with a retaining ring (500), the gas generator (400) is fixed to the retaining ring (500), the retaining ring (500) is provided with a stud (510), the stud (510) partially extends out of the main body part (110), the first connecting end (210) is hung on the stud (510), and the first connecting position (111) is the position of the stud (510).

7. The airbag device according to claim 4, characterized by The number of the constraint members (200) is multiple, the first connecting end (210) of each constraint member (200) is connected to the main body part (110), and the second connecting end (220) of each constraint member (200) is connected to the folding part (120).

8. The airbag device according to claim 3, characterized by The airbag (100) comprises a main body part (110) and a folding part (120), the folding part (120) is folded relative to the main body part (110) when the airbag (100) is in an initial state, and the first connecting end (210) and the second connecting end (220) are both connected to the main body part (110). The first connecting end (210) and the second connecting end (220) can both be disconnected from the main body part (110) during the process that the airbag (100) is transformed from the intermediate state to the unfolded state.

9. The airbag device according to claim 8, characterized by The safety airbag device further comprises a gas generator (400), the gas generator (400) is arranged on the main body part (110), the main body part (110) is provided with a third connecting position (113) and a fourth connecting position (114), the third connecting position (113) and the fourth connecting position (114) are located on both sides of the gas generator (400), and the first connecting end (210) and the second connecting end (220) are connected to the third connecting position (113) and the fourth connecting position (114) respectively.

10. The airbag device according to claim 3, characterized by The constraint member (200) comprises multiple constraint sections connected in sequence, and the ends of two constraint sections located on both sides are the first connecting end (210) and the second connecting end (220) respectively. During the process that the airbag (100) is transformed from the intermediate state to the unfolded state, at least one of the first connecting end (210) and the second connecting end (220) can be disconnected from the airbag (100), and the adjacent two constraint sections can be disconnected.

11. The airbag device according to any one of claims 1 to 10, characterized by The constraint member (200) is provided with a weakening structure (260), during the process that the airbag (100) is transformed from the intermediate state to the unfolded state, the constraint member (200) can be disconnected at the weakening structure (260) to release the constraint on the airbag (100).

12. The airbag device according to claim 11, characterized by Multiple through holes are arranged at intervals on the constraint member (200) to form the weakening structure (260), or part of the constraint member (200) is formed into the weakening structure (260) by thinning.

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