Double-depth air bag device

Abstract

The utility model relates to the field of automobile safety, in particular to a double-depth air bag device which comprises an air generator, an air bag air bag and a drawstring, the air bag air bag comprises a first air bag and a second air bag which are communicated with each other, the air generator is connected with the second air bag, and a drawstring releasing mechanism is further arranged on one side of the air generator. The drawstring comprises a free section and a release section, the end of the free section is connected with the first air bag, and the whole release section is 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 utility model relates to the technical field of automobile safety, in particular to a double-depth airbag device. Background Art

[0002] Car airbags are used to deploy and protect passengers when the vehicle collides. In order to have a more comfortable ride, front passengers usually adjust their seats as far back as possible. In this case, the passengers are far away from the airbags installed in the front trim, which will result in the airbags being unable to provide the proper protection to the passengers after being detonated in a car collision. Utility Model Content

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

[0004] The present invention provides a dual-depth airbag device, comprising a gas generator, an airbag bag, and a drawstring. The airbag bag comprises a first airbag and a second airbag that are interconnected. The 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 comprises 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 its entirety in the drawstring release mechanism.

[0005] In the first inflation stage, the gas generator injects gas into the second airbag to expand the second airbag, while the pull strap restricts the expansion of the first airbag.

[0006] 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, completing the deployment of the first airbag.

[0007] Compared with the existing technology, the beneficial effects of the present invention are: compared with traditional airbags, the scope of application of protection for front passengers is wider, and while ensuring that the front passengers 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 deployments, which makes the deployment of the airbag more stable.

[0008] Optionally, the drawstring adopts an integrated 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.

[0009] Optionally, the number of free segments in the drawstring is not limited to one, and one end is connected to the release segment and the other end is connected to a different position of the first air bag.

[0010] Optionally, 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 is inserted into the receiving cavity to fix the release section.

[0011] Optionally, the gas generator is embedded in the support plate and located on one side of the accommodating cavity.

[0012] Optionally, the tail end of the release section in the drawstring includes but is not limited to being fixed on the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 A schematic diagram of the structure of a double-depth airbag device provided in an embodiment of the utility model Figure 1 ;

[0015] Figure 2 A schematic diagram of the structure of a double-depth airbag device provided in an embodiment of the utility model Figure 2 ;

[0016] Figure 3 A schematic diagram of the structure of a drawstring release mechanism provided in an embodiment of the present invention Figure 1 ;

[0017] Figure 4 A schematic diagram of the structure of a drawstring release mechanism provided in an embodiment of the present invention Figure 2 ;

[0018] Figure 5 A schematic diagram of a first inflation stage state provided by an embodiment of the present utility model;

[0019] Figure 6 A schematic diagram of the second inflation stage state provided by an embodiment of the present utility model.

[0020] 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

[0021] 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 schematic embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0022] See also Figures 1-6 The present invention provides a dual-depth airbag device, including 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 that 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, and the release section 8 is stored in the drawstring release mechanism 6 as a whole.

[0023] In the first inflation stage, the gas generator 1 injects gas into the second airbag 5 to expand the second airbag 5, while the drawstring 3 restricts the expansion of the first airbag 4;

[0024] 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, completing the deployment of the first airbag 4.

[0025] In practice, the drawstring 3 adopts an integrated structure or a split structure; when a split structure is adopted, the free section 7 and the release section 8 are fixed by, but not limited to, sewing, riveting, or bonding.

[0026] In practice, the number of free segments 7 in the drawstring 3 is not limited to one, and one end is connected to the release segment 8 and the other end is connected to a different position of the first airbag 4 .

[0027] During implementation, the drawstring release mechanism 6 includes a support plate 9, which is provided with a accommodating cavity, and the release section 8 is placed in the accommodating cavity. When placed specifically, the release section 8 can be folded and 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; it can also adopt electromagnetic drive, 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.

[0028] In practice, the gas generator 1 is embedded in the support plate 9 and is located on one side of the accommodating cavity.

[0029] 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 .

[0030] Compared with traditional airbags, the solution provided by the present invention has a wider range of application for protecting front-seat passengers, ensuring that the front-seat 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, which makes the deployment of the airbag more stable.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection 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 includes a first airbag and a second airbag that are interconnected. A gas generator is connected to the second airbag for injecting gas into the airbag. 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 expand the second airbag, while the pull strap restricts the expansion of the first airbag. 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, completing the deployment of the first airbag.

2. The dual-depth airbag device according to claim 1, wherein: The drawstring adopts an integrated 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, wherein: There is not limited to one free section in the drawstring, and one end 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, wherein: The drawstring release mechanism includes a support plate with a receiving cavity in the support plate, in which the release section is placed, and 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, wherein: The gas generator is embedded in the supporting plate and is located at one side of the accommodating cavity.

6. The dual-depth airbag device according to claim 4, wherein: 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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