Adaptive front impact frontal single chamber airbag

Abstract

The utility model discloses a self -adaptation front row face single cavity safety air bag, including single cavity air bag, air bag clamping plate, gas generator, still include: install in the self -adaptation draw belt subassembly of single cavity air bag, self -adaptation draw belt subassembly includes inner draw belt, extension draw belt and short draw belt, and one end of inner draw belt is connected with the inner surface of single cavity air bag, and one end of extension draw belt is connected with the other end of inner draw belt, and its other end is connected on air bag clamping plate, and one end of short draw belt is connected with the other end of inner draw belt, and its other end is connected on air bag clamping plate, and the length of short draw belt is less than the length of extension draw belt, and draw belt cutting assembly, and draw belt cutting assembly installs on air bag clamping plate, is used for cutting short draw belt under the condition that air bag point explodes and the body shape of driver is greatly different from standard body shape.

Description

Technical Field

[0001] This utility model relates to the field of automotive airbag technology, and in particular to an adaptive front single-chamber airbag. Background Technology

[0002] Existing driver safety airbags typically feature a uniform frontal single-chamber airbag, which cannot accommodate drivers of varying body types. When a driver safety airbag deploys, the contact between the airbag and the driver is a dynamic process. Ideally, the airbag should fully deploy just in time to make direct frontal contact with the driver. However, because drivers have different body shapes and experience varying inertia during a collision, while the full deployment time of the airbag is fixed, this can lead to inadequate protection for the driver.

[0003] Existing driver airbags provide good protection for drivers of standard build (approximately 175cm tall and 70kg in weight). The greater the difference between the standard build and the actual size, especially if the driver is much smaller, the less effective the protection becomes.

[0004] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an adaptive front single-chamber airbag that addresses the shortcomings of the existing technology. This airbag adjusts the thickness of the airbag according to the driver's body size to achieve better protection.

[0006] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0007] An adaptive frontal single-chamber airbag includes a single-chamber airbag, an airbag clamp, and a gas generator. The single-chamber airbag is mounted on the airbag clamp, and the gas generator is mounted on the airbag clamp and rapidly inflates the single-chamber airbag with gas upon deployment, causing the single-chamber airbag to expand and deploy. It also includes:

[0008] An adaptive pull strap assembly is installed within the single-chamber airbag. The adaptive pull strap assembly includes an inner pull strap, an extension pull strap, and a short pull strap. One end of the inner pull strap is connected to the inner surface of the single-chamber airbag. One end of the extension pull strap is connected to the other end of the inner pull strap, and its other end is connected to the airbag clamp. One end of the short pull strap is connected to the other end of the inner pull strap, and its other end is connected to the airbag clamp. The length of the short pull strap is less than the length of the extension pull strap.

[0009] A strap cutting assembly is installed on the airbag clamp and is used to cut the short strap when the airbag deploys and the driver's body size differs significantly from the standard body size.

[0010] In a preferred embodiment of this utility model, the pull strap cutting component includes:

[0011] A cutting strip is disposed in a strip-shaped groove formed on the airbag clamp and extends outward from both ends of the strip-shaped groove. One end of the cutting strip is fixed to the surface of the airbag clamp, and the other end is a free end. The other end of the short pull strap is connected to the strip-shaped groove of the airbag clamp.

[0012] A small gas generator, the small gas generator being mounted on the airbag clamp and connected to the vehicle control system; and

[0013] A pusher block, located on the airbag clamp and near the free end of the cut strip, and connected to the small gas generator;

[0014] When the small gas generator is ignited, the small gas generator pushes the pusher block toward the free end of the cutting strip and lifts the free end of the cutting strip, so that the cutting strip, in conjunction with the strip-shaped groove, cuts the short pull strip.

[0015] In a preferred embodiment of this utility model, the end face of the push block facing the cutting strip is an arc-shaped surface.

[0016] In a preferred embodiment of this utility model, the free end of the cutting strip is rounded at the point where it contacts the arc-shaped surface of the push block.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: By installing an adaptive pull strap assembly inside the single-chamber airbag and cutting the adaptive pull strap assembly as needed using a pull strap cutting assembly, the thickness of the single-chamber airbag is changed to accommodate drivers of different body types, effectively supporting the driver's head, reducing chest compression, and preventing the driver's head from contacting the steering wheel or windshield, thus improving the protection effect for the driver. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the present invention when the pull strap has not been cut.

[0020] Figure 2 yes Figure 1 A longitudinal sectional view.

[0021] Figure 3 yes Figure 1 A bottom view.

[0022] Figure 4 This is a schematic diagram of the present invention after the pull strap has been cut.

[0023] Figure 5 yes Figure 4 A longitudinal sectional view.

[0024] Figure 6 yes Figure 4 A bottom view.

[0025] Figure 7 This is a schematic diagram of the structure of this utility model, omitting the single-cavity air bag and the adaptive pull strap assembly.

[0026] Figure 8 yes Figure 7 Top view.

[0027] Figure 9 This is an exploded view of the present invention, omitting the single-cavity air bag and the adaptive pull strap assembly.

[0028] Figure 10 This is a schematic diagram of the cooperation between the push block and the cutting strip of this utility model. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0030] Referring to the attached figure, an adaptive front single-chamber airbag is shown, including a single-chamber airbag 100, an airbag clamp 200, a gas generator 300, an adaptive strap assembly 400, and a strap cutting assembly 500.

[0031] The single-chamber airbag 100 is folded and mounted on the airbag clamp 200. The gas generator 300 is fixedly mounted on the airbag clamp 200 by fastening bolts. When the gas generator 300 is detonated, it releases a large amount of high-pressure gas, which rapidly fills the single-chamber airbag 100, causing it to expand and unfold. Figure 1 and Figure 4 As shown.

[0032] An adaptive pull strap assembly 400 is installed inside the single-chamber airbag 100. Specifically, the adaptive pull strap assembly 400 includes an inner pull strap 410, an extension pull strap 420, and a short pull strap 430. One end of the inner pull strap 410 is sewn to the inner surface of the single-chamber airbag 100. One end of the extension pull strap 420 is sewn to the other end of the inner pull strap 410, and its other end is fixedly connected to the airbag clamp 200. One end of the short pull strap 430 is sewn to the other end of the inner pull strap 410, and its other end is fixedly connected to the airbag clamp 200. The length of the short pull strap 430 is less than the length of the extension pull strap 420. In this embodiment, there are two sets of adaptive pull strap assemblies 400, symmetrically arranged inside the single-chamber airbag 100, which improves the stability of the single-chamber airbag 100 during deployment.

[0033] See Figures 7 to 9 and combined Figure 1 and Figure 4 The pull strap cutting assembly 500 is mounted on the airbag clamp 200 and is used to cut the short pull strap 430 of the adaptive pull strap assembly 400 when the airbag deploys and the driver's body size differs significantly from the standard body size. Specifically, the pull strap cutting assembly 500 includes a cutting strip 510, a small gas generator 520, and a pusher block 530. In this embodiment, to accommodate the number of adaptive pull strap assemblies 400, there are two cutting strips 510 and two pushers 530.

[0034] The cutting strip 510 is disposed in the corresponding strip-shaped groove 210 formed on the airbag clamp 200 and its two ends extend outward from the strip-shaped groove 210. One end of the cutting strip 510 is fixed to the surface of the airbag clamp 200 by welding or other means, and its other end is a free end, that is, the free end of the cutting strip 510 can be lifted up. The other end of the short pull strap 430 is connected to the strip-shaped groove 210 of the airbag clamp 200.

[0035] The small gas generator 520 is fixedly mounted on the airbag clamp 200 by fastening bolts and connected to the vehicle control system.

[0036] Two push blocks 530 are located on the airbag clamp 200, on both sides of the miniature gas generator 520, and close to the free ends of the corresponding cutting strips 510. Each push block 530 is connected to the miniature gas generator 520 via a connecting push rod 531. The end face of the push block 530 facing the cutting strip 510 is an arc-shaped surface 532, which facilitates the push block 530 lifting the free end of the cutting strip 510. The contact point 511 between the free end of the cutting strip 510 and the arc-shaped surface 532 of the push block 530 is rounded to better coordinate the action of the cutting strip 510 and the push block 530. Figure 10 As shown.

[0037] The working principle of the adaptive front single-chamber airbag of this utility model is as follows:

[0038] When the driver is in the driver's seat, the vehicle control system collects the driver's body shape data through cameras and / or pressure sensors, and determines whether the driver's body shape data exceeds the standard body shape range.

[0039] If the driver's body measurements do not exceed the standard body size range, upon collision, the gas generator 300 will detonate, releasing a large amount of high-pressure gas that rapidly fills the single-chamber airbag 100, causing it to expand and deploy. The expanded thickness is typically approximately 240mm. At this point, the short strap 430 remains taut, while the extension strap 420 remains slack. Figures 1 to 3 As shown.

[0040] If the driver's body measurements are smaller than the standard body size range, upon collision, the gas generator 300 is detonated, releasing a large amount of high-pressure gas that rapidly fills the single-chamber airbag 100, causing it to expand and deploy. Simultaneously, the small gas generator 520 is detonated, and the resulting high-pressure gas, via the connecting push rod 531, moves the push block 530 towards the free end of the cutting strip 510. This causes the push block 530 to lift the free end of the cutting strip 510, allowing it to cut the short strap 430 in conjunction with the strip-shaped groove 210. After the short strap 430 is cut, the extension strap 420 becomes taut. Because the length of the extension strap 420 is greater than the length of the short strap 430, the deployed thickness of the single-chamber airbag 100 is typically approximately 274 mm, better accommodating drivers of this size.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adaptive frontal single-chamber airbag, comprising a single-chamber airbag, an airbag clamp, and a gas generator, wherein the single-chamber airbag is mounted on the airbag clamp, and the gas generator is mounted on the airbag clamp and rapidly inflates the single-chamber airbag with gas upon deployment, causing the single-chamber airbag to expand and deploy; characterized in that, Also includes: An adaptive pull strap assembly is installed inside the single-chamber airbag. The adaptive pull strap assembly includes an inner pull strap, an extension pull strap, and a short pull strap. One end of the inner pull strap is connected to the inner surface of the single-chamber airbag. One end of the extension pull strap is connected to the other end of the inner pull strap, and the other end of the extension pull strap is connected to the airbag clamp. One end of the short pull strap is connected to the other end of the inner pull strap, and the other end of the short pull strap is connected to the airbag clamp. The length of the short pull strap is less than the length of the extension pull strap. as well as A strap cutting assembly is installed on the airbag clamp and is used to cut the short strap when the airbag deploys and the driver's body size differs significantly from the standard body size.

2. The adaptive front single-chamber airbag as described in claim 1, characterized in that, The zipper cutting assembly includes: A cutting strip is disposed in a strip-shaped groove formed on the airbag clamp and extends outward from both ends of the strip-shaped groove. One end of the cutting strip is fixed to the surface of the airbag clamp, and the other end is a free end. The other end of the short pull strap is connected to the strip-shaped groove of the airbag clamp. A small gas generator, the small gas generator being mounted on the airbag clamp and connected to the vehicle control system; and A pusher block, located on the airbag clamp and near the free end of the cut strip, and connected to the small gas generator; When the small gas generator is ignited, the small gas generator pushes the pusher block toward the free end of the cutting strip and lifts the free end of the cutting strip, so that the cutting strip, in conjunction with the strip-shaped groove, cuts the short pull strip.

3. The adaptive front single-chamber airbag as described in claim 2, characterized in that, The end face of the pusher block facing the cutting strip is an arc-shaped surface.

4. The adaptive front single-chamber airbag as described in claim 3, characterized in that, The free end of the cutting strip is rounded at the point where it contacts the arc-shaped surface of the push block.

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