Double-depth air bag device

Abstract

The invention relates to the field of automobile safety, in particular to a double-depth airbag device which comprises a gas generator, an airbag and a drawstring, the airbag comprises a first airbag and a second airbag which are communicated with each other, the gas generator is connected with the second airbag, a drawstring release mechanism is further arranged on one side of the gas generator, and the drawstring comprises a free section and a release section. The end part of the free section is connected with the first air bag, and the release section is integrally stored in the drawstring release mechanism; in the first inflation stage, the gas generator inflates gas into the second gas bag to enable the second gas bag to be unfolded, and meanwhile the first gas bag is limited to be unfolded under the action of the pull belt; in the second inflation stage, the gas generator inflates gas into the second air bag again, meanwhile, the drawstring release mechanism acts to release the release section in the drawstring and tighten the drawstring, and unfolding of the first air bag is completed. And compared with a traditional air bag, the application range of protection on the front-row passengers is wider, and the effective protection effect can still be achieved in collision under the condition that the front-row passengers are guaranteed to have comfortable sitting postures.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety, and in particular to a double-depth airbag device. Background Art

[0002] Car airbags are used to deploy and protect the occupants when the vehicle collides. In order to have a more comfortable ride, the front passengers usually adjust their seats as far back as possible. In this case, the occupants are far away from the airbags installed in the front trim, which will result in the airbags failing to provide due protection to the occupants after they are detonated in a car collision. Summary of the invention

[0003] In view of the above problems, an embodiment of the present invention provides a dual-depth airbag device.

[0004] A double-depth airbag device provided in an embodiment of the present invention includes a gas generator, an airbag bag and a drawstring, wherein the airbag bag includes a first airbag and a second airbag that are interconnected, the gas generator is connected to the second airbag and is used to inject gas into the airbag bag, a drawstring release mechanism is also provided on one side of the gas generator, the drawstring includes a free section and a release section, the end of the free section is connected to the first airbag, and the release section is stored in the drawstring release mechanism as a whole; In the first inflation stage, the gas generator injects gas into the second airbag to cause the second airbag to expand, while the first airbag is restricted from expanding under the action of the drawstring; In the second inflation stage, the gas generator again injects gas into the second airbag, and at the same time the drawstring release mechanism is actuated to release the release section in the drawstring and tighten the drawstring, thereby completing the deployment of the first airbag.

[0005] Compared with the prior art, the beneficial effects of the present invention are: compared with traditional airbags, the application range of the protection of front-row passengers is wider, and while ensuring the front-row passengers to sit comfortably, it can still play an effective protective role in the event of a collision; and its internal drawstring is in a stressed state during the first and second deployment, so that the deployment of the airbag has higher stability.

[0006] Optionally, the drawstring adopts an integral structure or a split structure; when a split structure is adopted, the free section and the release section are fixed by means of, but not limited to, sewing, riveting, or bonding.

[0007] Optionally, the free section in the drawstring is not limited to one, and one end is connected to the release section, and the other end is connected to a different position of the first air bag.

[0008] Optionally, the drawstring release mechanism includes a support plate having a accommodating cavity in the support plate, the release section being placed in the accommodating cavity, a pull rope device being provided outside the support plate and on one side of the accommodating cavity, and a releaser in the pull rope device being inserted into the accommodating cavity to fix the release section.

[0009] Optionally, the gas generator is embedded in the support plate and located on one side of the accommodating cavity.

[0010] Optionally, the tail end of the release section in the drawstring includes but is not limited to being fixed on a support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings: Figure 1 A schematic diagram of a double-depth airbag device provided in an embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of a double-depth airbag device provided in an embodiment of the present invention Figure 2 ; Figure 3 A structural diagram of a drawstring release mechanism provided by an embodiment of the present invention Figure 1 ; Figure 4 A structural diagram of a drawstring release mechanism provided by an embodiment of the present invention Figure 2 ; Figure 5 A schematic diagram of a first inflation stage state provided by an embodiment of the present invention; Figure 6 A schematic diagram of the second inflation stage state provided by an embodiment of the present invention.

[0012] Among them, 1. gas generator; 2. airbag; 3. drawstring; 4. first airbag; 5. second airbag; 6. drawstring release mechanism; 7. free section; 8. release section; 9. support plate; 10. pull rope device; 11. releaser. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0014] See also Figure 1-Figure 6 A double-depth airbag device provided by an embodiment of the present invention includes a gas generator 1, an airbag bag 2 and a drawstring 3. The airbag bag 2 includes a first airbag 4 and a second airbag 5 which are interconnected. The gas generator 1 is connected to the second airbag 5 for injecting gas into the airbag bag 2. A drawstring release mechanism 6 is also provided on one side of the gas generator 1. The drawstring 3 includes a free section 7 and a release section 8. The end of the free section 7 is connected to the first airbag 4. The release section 8 is stored in the drawstring release mechanism 6 as a whole. In the first inflation stage, the gas generator 1 injects gas into the second airbag 5 to expand the second airbag 5, and at the same time, the first airbag 4 is restricted from expanding under the action of the drawstring 3; In the second inflation stage, the gas generator 1 again injects gas into the second airbag 5, and at the same time the drawstring release mechanism 6 is actuated to release the release section 8 in the drawstring 3 and tighten the drawstring 3, thereby completing the deployment of the first airbag 4.

[0015] In practice, the drawstring 3 adopts an integral structure or a split structure; when a split structure is adopted, the free section 7 and the release section 8 are fixed by means of, but not limited to, sewing, riveting, or bonding.

[0016] In practice, the free section 7 in the drawstring 3 is not limited to one, and one end is connected to the release section 8 and the other end is connected to a different position of the first airbag 4 .

[0017] During implementation, the drawstring release mechanism 6 includes a support plate 9, in which a accommodating cavity is provided, and the release section 8 is placed in the accommodating cavity. When placed specifically, the release section 8 can be folded in a folding manner and then placed in the accommodating cavity. A pull rope device 10 is provided on the outside of the support plate 9 and on one side of the accommodating cavity. The releaser 11 in the pull rope device 10 is inserted into the accommodating cavity to fix the release section 8; the pull rope device 10 can adopt an electronic detonating device, and the releaser 11 breaks when detonated, thereby achieving auxiliary breaking and releasing the drawstring 3; electromagnetic drive can also be adopted, such as an electromagnet structure, and the telescopic rod in the electromagnet cooperates with the gas generator 1 to be retracted during secondary inflation to release the drawstring 3.

[0018] In practice, the gas generator 1 is embedded in the support plate 9 and is located at one side of the accommodating cavity.

[0019] In practice, the tail end of the release section 8 in the pull belt 3 includes but is not limited to being fixed on the support plate 9 , and may also be fixed on the gas generator 1 .

[0020] Compared with traditional airbags, the solution provided by the present invention has a wider range of application for protecting front-row passengers, ensuring that the front-row passengers are sitting comfortably and can still provide effective protection in the event of a collision; and its internal drawstring is in a stressed state during both the first and second deployments, so that the deployment of the airbag has higher stability.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A dual-depth airbag device, comprising a gas generator, an airbag and a drawstring, characterized in that: The airbag bag includes a first airbag and a second airbag that are interconnected. A gas generator is connected to the second airbag to inject gas into the airbag bag. A drawstring release mechanism is also provided on one side of the gas generator. The drawstring includes a free section and a release section. The end of the free section is connected to the first airbag. The release section is stored in the drawstring release mechanism as a whole. In the first inflation stage, the gas generator injects gas into the second airbag to cause the second airbag to expand, while the first airbag is restricted from expanding under the action of the drawstring; In the second inflation stage, the gas generator again injects gas into the second airbag, and at the same time the drawstring release mechanism is actuated to release the release section in the drawstring and tighten the drawstring, thereby completing the deployment of the first airbag.

2. The double-depth airbag device according to claim 1, characterized in that: The drawstring adopts an integral structure or a split structure; when a split structure is adopted, the free section and the release section are fixed by means of, but not limited to, sewing, riveting, or bonding.

3. The dual-depth airbag device according to claim 1, characterized in that: There is not limited to one free section in the drawstring, one end of each is connected to the release section, and the other end is connected to a different position of the first air bag.

4. The dual-depth airbag device according to claim 1, characterized in that: The drawstring release mechanism includes a support plate, a receiving cavity is provided in the support plate, the release section is placed in the receiving cavity, a pull rope device is provided outside the support plate and on one side of the receiving cavity, and the releaser in the pull rope device penetrates into the receiving cavity to fix the release section.

5. The dual-depth airbag device according to claim 4, characterized in that: The gas generator is embedded in the support plate and is located at one side of the accommodating cavity.

6. The dual-depth airbag device according to claim 4, characterized in that: The tail end of the release section in the drawstring includes but is not limited to being fixed on the support plate.

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